CN105632406A - Display device and image control method - Google Patents
Display device and image control method Download PDFInfo
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- CN105632406A CN105632406A CN201610005789.9A CN201610005789A CN105632406A CN 105632406 A CN105632406 A CN 105632406A CN 201610005789 A CN201610005789 A CN 201610005789A CN 105632406 A CN105632406 A CN 105632406A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
Abstract
The invention discloses a display device and an image control method. The display device comprises a display panel and a drive module; the drive module is electrically connected to the display panel, and drives the display panel to display the image, wherein the percentage of the brightness of the illumination pixel of the display panel and the illumination area has a curve; when the curve is smaller than the first illumination area percentage, the curve has a first slope, and when the curve is greater than the first illumination area percentage, the curve has a second slope, and the absolute value of the second slope is greater than the absolute value of the first slope. The invention discloses an image control method for the display device.
Description
The application is the applying date is on 08 03rd, 2012, and application number is 201210275182.4, and denomination of invention is the divisional application of the patent application of " display device and image control method thereof ".
Technical field
The present invention is about a kind of display device and image control method thereof, especially in regard to a kind of self-emission display apparatus and image control method thereof.
Background technology
Organic Light Emitting Diode (OrganicLight-EmittingDiode, OLED) have that self-luminous, high brightness, high contrast, volume be frivolous, low power consumption and the advantage such as response speed is fast, therefore, all kinds of display image system it is applied to gradually, for instance organic light-emitting display device. Organic light-emitting display device can be complied with its type of drive and be divided into passive matrix type (Passive-Matrix) and active matrix (Active-Matrix) etc. two kinds. Passive matrix type organic light-emitting display device is limited to drive pattern, therefore have the life-span shorter with cannot the shortcoming such as large area. Although active matrix organic light-emitting display device cost costly, technique more complicated, but be applicable to large scale, the true color of high information capacity of high-res shows, therefore, it has also become the main flow of organic light-emitting display device.
The equivalent circuit of the pixel of known a kind of active matrix organic light-emitting display device has two thin film transistor (TFT)s, an electric capacity (2T1C) and an organic illuminating element. In two transistors, the transistor of one of them is as selecting switch, and its grid can receive scan signal, and its drain electrode can receive a data signal. Another transistor can drive element as one, and this element can control an electric current and drive organic illuminating element luminous. Wherein, data signal inputs the grid of this driving element, and organic light-emitting display device can pass through to control the voltage of this data signal, to control the luminosity of the organic illuminating element of this pixel. Thereby, capable of displaying image.
Please respectively refer to shown in Figure 1A and Figure 1B, wherein, the pixel intensity that is lit that Figure 1A is known a kind of organic light-emitting display device accounts for the schematic diagram of whole elemental area percentage ratio, and the power consumption being lit pixel that Figure 1B is known a kind of organic light-emitting display device accounts for the schematic diagram of whole elemental area percentage ratio. Wherein, the transverse axis of Figure 1A and Figure 1B represents in the show image of organic light-emitting display device respectively, it is lit pixel and accounts for the percentage ratio of whole elemental area, the longitudinal axis of Figure 1A represents the brightness ratio that the brightness being lit pixel is lit with whole pixels, and the longitudinal axis of Figure 1B represents the consumption power of display device. In this, as shown in Figure 1A, assuming that when pixel is lit, this pixel is shown as white, and when pixel is not lit, this pixel is shown as black.
For the some L of Figure 1A curve, it represents when in the display picture of organic light-emitting display device, is lit pixel and accounts for the percentage ratio of whole elemental area when being 20%, and the brightness being lit pixel in this show image is about about 136% when whole pixel is lit. Wherein, when show image be lit pixel account for the ratio of whole elemental area less time, then the brightness being lit pixel is higher, and higher brightness contributes to beholder and is easier to see show image. But, when be lit pixel account for the ratio of whole elemental area higher time, owing to show image there being more pixel can emit beam, therefore the brightness being lit pixel will not equal proportion raise, therefore, the brightness being lit pixel of Figure 1A is to reduce with lighting area increase, but beholder also can easily see show image.
It addition, as shown in Figure 1B, when one shows in picture, be lit pixel account for the percentage ratio of whole elemental area higher time, the power consumption of organic light-emitting display device almost rises in a linear fashion.
Therefore, how to provide a kind of display device and image control method thereof, display device can be made to have relatively low power consumption in response to different show images, it has also become one of important topic.
Summary of the invention
Because above-mentioned problem, the purpose of the present invention is for providing a kind of display device that display device can be made to have lower power consumption in response to different show images and image control method thereof.
For reaching above-mentioned purpose, include a display floater and according to a kind of display device of the present invention and drive module. Drive module to electrically connect with display floater, and there is an image-processing circuit and a data drive circuit. Image-processing circuit receives one first signal of video signal of a picture frame time, when an average gray-scale value of the first signal of video signal sets grey decision-making more than or equal to one first, image-processing circuit reduces the grey decision-making of the first signal of video signal according to one first ratio and becomes one second signal of video signal. Data drive circuit receives the second signal of video signal, and drives display floater to show an image according to the second signal of video signal.
In one embodiment, display device is an organic LED display device.
In one embodiment, display floater, according to the first driving electric current setting grey decision-making, is drive between the 10% to 30% of whole pixel light currents between display floater.
In one embodiment, when average gray-scale value is more than or equal to the first setting grey decision-making, and when setting grey decision-making less than one second, image-processing circuit reduces the grey decision-making of the first signal of video signal according to the first ratio and becomes the second signal of video signal.
In one embodiment, when average gray-scale value sets grey decision-making more than or equal to second, image-processing circuit reduces the grey decision-making of the first signal of video signal according to one second ratio and becomes one the 3rd signal of video signal.
In one embodiment, display floater, according to the second driving electric current setting grey decision-making, is drive between the 65% to 75% of whole pixel light currents between display floater.
In one embodiment, second grey decision-making is set more than the first setting grey decision-making.
In one embodiment, the first ratio is between 0.9��0.75, and the second ratio is between 0.74��0.55.
In one embodiment, when average gray-scale value is more than or equal to the first setting grey decision-making, and when setting grey decision-making less than one the 3rd, image-processing circuit reduces the grey decision-making of the first signal of video signal according to one the 3rd ratio and becomes one the 4th signal of video signal, and the 3rd sets grey decision-making less than the second setting grey decision-making.
In one embodiment, data drive circuit exports a data drive signal according to the second signal of video signal or the 3rd signal of video signal or the 4th signal of video signal and drives multiple pixel show images of display floater.
In one embodiment, each pixel has a driving transistor and a light-emitting component, and data drive signal inputs the grid driving transistor respectively, to control the luminosity of light-emitting component.
For reaching above-mentioned purpose, image control method according to a kind of display device of the present invention, display device has a display floater and and drives module, module is driven to electrically connect with display floater, and there is an image-processing circuit and a data drive circuit, image control method includes one first signal of video signal being received a picture frame time by image-processing circuit, when an average gray-scale value of the first signal of video signal is more than or equal to one first setting grey decision-making, and when setting grey decision-making less than one second, reduce the grey decision-making of the first signal of video signal by image-processing circuit according to one first ratio and become one second signal of video signal.
In one embodiment, display floater, according to the first driving electric current setting grey decision-making, is drive the 10% to 30% of whole pixel light currents between display floater.
In one embodiment, image control method more includes working as average gray-scale value and sets grey decision-making more than or equal to one second, and during less than most high gray value, image-processing circuit reduces the grey decision-making of the first signal of video signal according to one second ratio and becomes one the 3rd signal of video signal.
In one embodiment, display floater, according to the second driving electric current setting grey decision-making, is drive between the 65% to 75% of whole pixel light currents between display floater.
In one embodiment, the first ratio is between 0.9��0.75, and the second ratio is between 0.74��0.55.
In one embodiment, when average gray-scale value is more than or equal to the first setting grey decision-making, and when setting grey decision-making less than one the 3rd, reduce the grey decision-making of the first signal of video signal by image-processing circuit according to one the 3rd ratio and become one the 4th signal of video signal, and the 3rd sets grey decision-making less than the second setting grey decision-making.
In one embodiment, image control method more includes exporting a data drive signal driving display floater show image by data drive circuit according to the second signal of video signal or the 3rd signal of video signal or the 4th signal of video signal.
In one embodiment, image control method is more included being controlled respectively by data drive signal multiple pixels of display floater and emits beam.
In one embodiment, image control method is more included being inputted the one of each pixel respectively by data drive signal and drives the grid of transistor, to control the luminosity of a light-emitting component of each pixel.
For reaching above-mentioned purpose, include a display floater and according to a kind of display device of the present invention and drive module, module is driven to electrically connect with display floater, and drive display floater show image, wherein, the brightness of display floater point bright pixel has a curve with lighting area percentage, and curve had one first slope before one first lights area percentage, curve has one second slope after first lights area percentage, and the absolute value of the second slope is more than the absolute value of the first slope.
In one embodiment, first to light area percentage be between 10% to 30%.
In one embodiment, curve has one the 3rd slope after one second lights area percentage, and the 3rd slope and the second slope are to differ, and second lights area percentage and light area percentage more than first.
In one embodiment, second to light area percentage be between 65% to 75%.
In one embodiment, the absolute value of the second slope is more than the absolute value of the 3rd slope.
In one embodiment, the brightness of display floater point bright pixel is the brightness of most high gray value.
From the above, the driving module of display device of the present invention has an image-processing circuit can receive one first signal of video signal of a picture frame time, and when an average gray-scale value of the first signal of video signal sets grey decision-making more than or equal to one first, image-processing circuit can reduce the grey decision-making of the first signal of video signal according to one first ratio and become one second signal of video signal. It addition, data drive circuit can receive the second signal of video signal, and drive display floater show image according to the second signal of video signal. Comparing with known, the present invention can control the gray scale voltage of data drive circuit output in response to the grey decision-making of different show images, makes display floater have relatively low driving electric current, and then makes display device have relatively low power consumption.
Accompanying drawing explanation
The pixel intensity that is lit that Figure 1A is known a kind of organic light-emitting display device accounts for the schematic diagram of whole elemental area percentage ratio;
Figure 1B is the schematic diagram that the power consumption being lit pixel of known a kind of organic light-emitting display device accounts for whole elemental area percentage ratio;
Fig. 2 is the function block schematic diagram of a kind of display device of present pre-ferred embodiments;
Fig. 3 is the schematic flow sheet of the image control method of a kind of display device of present pre-ferred embodiments;
Fig. 4 A is in the image control method of the application present invention, the brightness of the some bright pixel of two kinds of different display devices and the schematic diagram lighting area percentage; And
Fig. 4 B is that in the image control method of the application present invention, the power consumption of the some bright pixel of two kinds of different display devices accounts for the schematic diagram of whole elemental area percentage ratio.
Drawing reference numeral:
1: display device
11: display floater
12: drive module
121: image-processing circuit
122: data drive circuit
123: scan drive circuit
A, B: dotted line
A ', B ': solid line
Dn: data wire
L: point
S01��S04: step
S1: the first signal of video signal
S2: the second signal of video signal
Sm: scanning line
Detailed description of the invention
Hereinafter with reference to relevant drawings, a kind of display device according to present pre-ferred embodiments and image control method thereof being described, wherein identical element will be illustrated with identical reference marks.
Refer to shown in Fig. 2, it is the function block schematic diagram of a kind of display device 1 of present pre-ferred embodiments.
The display device 1 of the present invention is a self-luminous (self-luminous) display device. In this, it is for active matrix organic light-emitting display device (AM-OLED). Certainly, display device 1 is alternatively other self-emission display apparatus. Wherein, display device 1 includes display floater 11 and a driving module 12.
Display floater 11 has at least one pixel, and driving module 12 is drive display floater 11 by least scan line and at least one data wire. In this example it is shown that device 1 is to have multiple pixel (Fig. 2 does not show), multi-strip scanning line SmAnd a plurality of data lines DnFor example. Wherein, described these scanning line SmAnd described these data wires DnIt is in being crisscross arranged to form these pel arrays described. And display floater 11 can pass through described these scanning line SmAnd described these data wires DnElectrically connect with driving module 12.
Module 12 is driven to include an image-processing circuit 121, data drive circuit 122 and scan driving circuit 123. Wherein, scan drive circuit 123 is by described these scanning line SmElectrically connect with display floater 11, and data drive circuit 121 is by described these data wires DnElectrically connect with display floater 11. Scanning line S can be made respectively when scan drive circuit 123 exports one scan driving signalmConducting, and data drive circuit 121 can by a data drive signal of every for correspondence one-row pixels by described these data wires DnIt is sent to these pixels described, so that display floater 11 show image. It addition, drive module 12 more can include a sequencing contro (T-con) circuit (Fig. 2 does not show) respectively with data drive circuit 121 and scan drive circuit 123. Wherein, image-processing circuit 121 can be included in sequential control circuit, to save circuit cost. Certainly, image-processing circuit 121 is alternatively an independent integrated circuit, in this, is not any limitation as.
Image-processing circuit 121 can receive one first signal of video signal S1 of a picture frame time (frametime), and calculates an average gray-scale value of the first signal of video signal S1. Wherein, a picture frame time is exactly the time that display device 1 shows needed for a picture, therefore the first signal of video signal S1 has in a display picture, drives whole grey decision-making of all pixels of display floater 11. In other words, image-processing circuit 121 first calculates the average gray-scale value of all pixels of a display picture, and when this average gray-scale value sets grey decision-making (first sets grey decision-making average gray-scale value) more than or equal to one first, image-processing circuit 121 can reduce the grey decision-making of the first signal of video signal S1 according to one first ratio and become one second signal of video signal S2. In this, display floater 11 can be luminous according to the first setting grey decision-making, and display floater 11 is according to the first driving electric current setting grey decision-making, is can drive between the 10% to 30% of whole pixel light current between display floater.
In the present embodiment, grey decision-making for 8 bits, the scope of the grey decision-making of display floater 11 is between 0��255, therefore, grey decision-making is set as 145 for first, grey decision-making 145 drives the electric current of display floater 11, approximates and drives the 30% of electric current with what all pixels of display floater 11 were lighted by most high gray value (255). It addition, the value of the first ratio can between 0.9��0.75, first ratio of the present embodiment is for 0.8. Therefore, when showing the average gray-scale value of all pixels of picture more than or equal to 145, image-processing circuit 121 can obtain the second signal of video signal S2 after respectively each grey decision-making of the first signal of video signal S1 can being multiplied by 0.8. Such as the grey decision-making of a certain pixel of the first signal of video signal S1 is 200, and assumes that in picture, the meansigma methods of all grey decision-making is above 145, so the grey decision-making of pixel will reduce to 200 �� 0.8=160, this is the new grey decision-making of this pixel of the second signal of video signal S2. Other pixel is by that analogy.
Additionally, in the present embodiment, when calculated average gray-scale value is more than or equal to the first setting grey decision-making, and when setting grey decision-making less than one second, that is first set grey decision-making average gray-scale value second when setting grey decision-making, then image-processing circuit 121 reduces the grey decision-making of the first signal of video signal S1 also in accordance with the first ratio and becomes the second signal of video signal S2. In addition, when calculated average gray-scale value is more than or equal to the second setting grey decision-making, that is second set grey decision-making average gray-scale value, then image-processing circuit 121 can reduce the grey decision-making of the first signal of video signal S1 according to one second ratio and become one the 3rd signal of video signal (Fig. 2 does not show). Wherein, the numerical value of the first ratio and the second ratio can be identical or differ, and second sets grey decision-making and can set grey decision-making more than first. Wherein, display floater 11, according to the second driving electric current setting grey decision-making, is can drive between the 65% to 75% of whole pixel light current between display floater 11. The value of the second ratio can between 0.74��0.55, and in the present embodiment, the second ratio is for 0.72, and the second setting grey decision-making is such as 215. Grey decision-making 215 drives the electric current of display floater 11, is equal to display floater 11 and drives the 70% of whole pixel light current.
Holding, the image-processing circuit 121 of the present invention first calculates the average gray-scale value of all pixels in a display picture, and < during the first setting grey decision-making (such as 145), the first signal of video signal S1 does not change when 0 average gray-scale value; When the first setting grey decision-making (such as 145) average gray-scale value, < during the second setting grey decision-making (such as 215), each grey decision-making of the first signal of video signal S1 is to be multiplied by the first ratio (such as 0.8) and become the second signal of video signal S2; When second sets most high gray value (such as 255) of grey decision-making (such as 215) average gray-scale value, then each grey decision-making of the first signal of video signal S1 is to be multiplied by the second ratio (such as 0.72) and become the 3rd signal of video signal. In this, first set grey decision-making as 145, second set grey decision-making as the 215, first ratio as 0.8 and second ratio as 0.72 simply citing, user is it is of course possible to use different first to set grey decision-making, second set grey decision-making, the first ratio and the second ratio according to its demand.
It addition, there is the existence of the second setting grey decision-making and the second ratio in the present embodiment, but, in other embodiments, user also can not use the second setting grey decision-making and the second ratio, and only uses the first setting grey decision-making and the first ratio. In other words, in other embodiments, when first sets most high gray value (such as 255) of grey decision-making average gray-scale value, each grey decision-making of the first signal of video signal S1 can be multiplied by a ratio by image-processing circuit 121 respectively, to obtain the second signal of video signal S2. Additionally, user also can set more setting grey decision-making and ratio thereof certainly according to different display devices, for instance the 3rd setting grey decision-making, the 4th setting grey decision-making, the 3rd ratio and the 4th ratio etc. can be set. Such as can set one the 3rd setting grey decision-making and set between grey decision-making and the second setting grey decision-making between first, and when average gray-scale value is more than or equal to the first setting grey decision-making, and when setting grey decision-making less than one the 3rd, image-processing circuit 121 can reduce the grey decision-making of the first signal of video signal according to one the 3rd ratio and become one the 4th signal of video signal, or be other setting means, in this, it is not any limitation as.
When producing the second signal of video signal S2 or the 3rd signal of video signal or four signal of video signal when image-processing circuit 121, data drive circuit 122 can receive, and drives display floater 11 show image according to the second signal of video signal S2 or the 3rd signal of video signal or the 4th signal of video signal. In this, data drive circuit 122 can export a data drive signal according to the signal of video signal correspondence received and drive display floater 11 show image. In other words, when data drive circuit 122 receives the signal of video signal of image-processing circuit 121 output, data drive circuit 122 can export data drive signal according to this signal of video signal correspondence, and these pixels described that data drive signal can control display floater 11 respectively send corresponding light, with show image picture.
In this example it is shown that each pixel of panel 11 can be respectively provided with a driving transistor and a light-emitting component (Organic Light Emitting Diode), wherein, transistor is driven can to control light-emitting component luminescence. And the data drive signal of data drive circuit 122 output can pass through data wire DnInput the grid driving transistor of each pixel, thereby can control the luminosity of the light-emitting component of each pixel. During owing to setting grey decision-making when the average gray-scale value showing picture more than or equal to first, image-processing circuit 121 has reduced the grey decision-making of signal of video signal output, therefore all gray scale voltages of the data drive signal of data drive circuit 122 output also reduce, therefore the luminosity of the light-emitting component of all pixels also reduces, the electric current driving display floater 11 is also reduced, therefore the power consumption of display device 1 also can reduce.
It should be noted that when the average gray-scale value showing picture is relatively low, represent display device 1 and show that the ratio being lit pixel of picture is less, therefore the present invention does not turn down the grey decision-making of the first signal of video signal S1, so help to beholder sees show image. But, when the average gray-scale value showing picture is higher, represent the ratio being lit pixel in the display picture of display device 1 higher, owing to show image there being more pixel can emit beam, therefore the present invention turns down the grey decision-making of the first signal of video signal S1, and then the overall brightness of picture reduces to make display device 1 show, but for beholder, although the overall brightness of display picture reduces, but owing to picture there being more pixel can emit beam, therefore beholder is not easy to find, nor affect on its rating quality.
It addition, referring to shown in Fig. 2 and Fig. 3, wherein, Fig. 3 is the schematic flow sheet of the image control method of a kind of display device of present pre-ferred embodiments.
As in figure 2 it is shown, display device 1 includes a display floater 11 and drives module 12. Module 12 is driven to include an image-processing circuit 121, data drive circuit 122 and scan driving circuit 123. Wherein, the technical characteristic of display device 1 can refer to above-mentioned, repeats no more in this.
It addition, as it is shown on figure 3, the image control method of the display device of the present invention is to include step S01 to step S04.
In step S01, as in figure 2 it is shown, be the one first signal of video signal S1 being received a picture frame time by image-processing circuit 121. In this, a picture frame time is exactly the time that display device 1 shows needed for a picture, therefore the first signal of video signal S1 has in a display picture, drives whole grey decision-making of all pixels of display floater 11.
Then, in step S02, it is when an average gray-scale value of the first signal of video signal S1 is more than or equal to one first setting grey decision-making, and when setting grey decision-making less than one second, reduce the grey decision-making of the first signal of video signal S1 by image-processing circuit 121 according to one first ratio and become one second signal of video signal S2. Wherein, display floater 11, according to the first driving electric current setting grey decision-making, is drive the 10% to 30% of whole pixel light current between display floater 11. In this, the first ratio is 0.8, and first to set grey decision-making be for 145, and grey decision-making 145 drives the electric current of display floater 11, approximates and drives the 30% of electric current with what all pixels of display floater 11 were lighted by most high gray value (255).
It addition, in step S03, when average gray-scale value sets grey decision-making more than or equal to second, and during less than most high gray value, reduce the grey decision-making of the first signal of video signal S1 by image-processing circuit 121 according to one second ratio and become one the 3rd signal of video signal. In this, display floater 11, according to the second driving electric current setting grey decision-making, is can drive between the 65% to 75% of whole pixel light current between display floater 11. In the present embodiment, the second ratio is for 0.72, and the second setting grey decision-making is such as 215. Grey decision-making 215 drives the electric current of display floater 11, is equal to display floater 11 and drives the 70% of whole pixel light current.
Finally, after the judgement performing average gray-scale value and process, step S04 can be performed, be export a data drive signal by data drive circuit 122 according to the second signal of video signal S2 or the 3rd signal of video signal to drive display floater 11 show image. In this, it is that the multiple pixels being controlled display floater 11 by data drive signal respectively are emitted beam, with show image. It addition, be one of each pixel by data drive signal respectively input display panel 11 grid of driving transistor, to control the luminosity of a light-emitting component of each pixel.
Additionally, the further feature of the image control method of display device of the present invention is in above-mentioned middle detailed description, repeat no more in this.
Additionally, please respectively refer to shown in Fig. 4 A and Fig. 4 B, wherein, Fig. 4 A is in the image control method of the application present invention, the brightness of the some bright pixel of two kinds of different display devices and the schematic diagram lighting area (onarea) percentage ratio, and in the image control method that Fig. 4 B is the application present invention, the power consumption of the some bright pixel of two kinds of different display devices accounts for the schematic diagram of whole elemental area percentage ratio. In this, it is the ratio (such as 30:100) driving electric current driving electric current and all light picture measuring a display picture, just can correspond to the percentage ratio how much lighting area. It addition, the present invention is after the current ratio measuring and driving display floater with average gray-scale value and all light grey decision-making, for instance obtain the percentage ratio lighting area of pixel in the way of look-up table (look-uptable). Additionally, the brightness that the brightness of display floater point bright pixel is most high gray value.
Wherein, the transverse axis of Fig. 4 A and Fig. 4 B represents in the show image of display device respectively, and pixel lights the percentage ratio of area, and the longitudinal axis of Fig. 4 A represents the brightness being lit pixel, and the longitudinal axis of Fig. 4 B represents the consumption power of two kinds of display devices. It addition, solid line A ', the B ' of Fig. 4 A and Fig. 4 B indicate that two kinds of different display devices do not use the curve of the image control method of the present invention, and dotted line A, B indicate that two kinds of different display devices use the curve of the image control method of the present invention.
In the present embodiment, grey decision-making is set for 145 with first, grey decision-making 145 drives the electric current of display floater 11, drive the 30% of electric current equal to what all pixels of display floater 11 lighted with most high gray value (255), namely light area 30% (present invention can be light area 10%��30% between). Therefore, as shown in Figure 4 A, after being lit elemental area ratio 30%, the brightness of dotted line A and B reduces because of the first ratio (0.8), therefore dotted line A, B are when more than 30%, brightness curve is turned right lower inclination soon, in other words, dotted line A, B had one first slope before lighting the 30% of area, dotted line A, B have one second slope after light area 30%, and first slope and the second slope be differ, and the absolute value of the second slope be greater than the first slope absolute value (present invention can be light area 10%��30% between).
Additionally, it is for 215 that the second of the present embodiment sets grey decision-making, and grey decision-making 215 drives the electric current of display floater 11, be equal to display floater 11 and drive the 70% of whole pixel light current, namely light area 70% (present invention can be light area 65%��75% between). Therefore, when display floater be lit elemental area more than 70% after (the second ratio is 0.72), dotted line A, B turn right lower inclination with another slope again, in other words, dotted line A, B have one the 3rd slope after light area 70%, and the 3rd slope and the second slope be differ, and the absolute value of the second slope be greater than the 3rd slope absolute value (present invention can be light area 65%��75% between).
It addition, as shown in Figure 4 B, when the percentage ratio lighting area is more and more high, the power consumption of display device is also more and more high. But, by Fig. 4 B it is evident that, in time lighting area more than 30%, curve A, B of the power consumption of the image control method of the present invention is higher along with lighting area, it will be apparent that reduce a lot than the power consumption profile A ', the B ' that do not use image control method of the present invention.
Last is mentioned that, for organic LED display device, when showing a webpage, owing to, in the display picture on webpage, usually the ratio shared by white portion is higher, show according to statistics, the average power consumption of the display picture of webpage, all shows about the 75% of white power consumption, is also approximately equivalent to a bright pixel and accounts for about the 75% of whole elemental area for picture, therefore, the image control method of the present invention applied as described above its power consumption can be reduced.
Additionally, according to statistics, if during organic LED display device display movie or television picture, the average power consumption of its display picture is about 20% (is approximately equivalent to light elemental area and accounts for whole elemental area about 20%) that picture all shows the power consumption of white. If additionally, during the static images such as display photos, the average power consumption of its display picture is about 23% (is approximately equivalent to a bright pixel and accounts for whole elemental area about 23%) that picture all shows the power consumption of white. Two kinds of above-mentioned display pictures, although its power consumption is relatively low, and but, the image control method that still can moderately apply the present invention more reduces its power consumption.
In sum, the driving module of display device of the present invention has an image-processing circuit can receive one first signal of video signal of a picture frame time, and when an average gray-scale value of the first signal of video signal sets grey decision-making more than or equal to one first, image-processing circuit can reduce the grey decision-making of the first signal of video signal according to one first ratio and become one second signal of video signal. It addition, data drive circuit can receive the second signal of video signal, and drive display floater show image according to the second signal of video signal. Comparing with known, the present invention can control the gray scale voltage of data drive circuit output in response to the grey decision-making of different show images, makes display floater have relatively low driving electric current, and then makes display device have relatively low power consumption.
The foregoing is only illustrative, but not be restricted person. Any spirit without departing from the present invention and category, and to its equivalent modifications carried out or change, all should be included in claim.
Claims (20)
1. a display device, it is characterised in that described display device includes:
One display floater; And
One drives module, electrically connects with described display floater, and drives described display floater show image,
Wherein, the brightness of described display floater point bright pixel has a curve with lighting area percentage, described curve has one first slope in less than 1 first when lighting area percentage, described curve has one second slope in time lighting area percentage more than described first, and the absolute value of described second slope is more than the absolute value of described first slope.
2. display device as claimed in claim 1, it is characterised in that it is an organic LED display device.
3. display device as claimed in claim 1, it is characterised in that described first lights area percentage between 0% to 30%.
4. display device as claimed in claim 1, it is characterised in that described display floater lights elemental area percentage ratio when lighting area percentage more than described first, and the brightness of described display floater reduces according to one first ratio.
5. display device as claimed in claim 4, it is characterised in that described first ratio is between 0.9 and 0.75.
6. display device as claimed in claim 1, it is characterized in that, described curve has one the 3rd slope in more than 1 second when lighting area percentage, described 3rd slope and described second slope differ, and described second lights area percentage lights area percentage more than described first.
7. display device as claimed in claim 6, it is characterised in that the absolute value of described second slope is more than the absolute value of described 3rd slope.
8. display device as claimed in claim 6, it is characterised in that described second lights area percentage between 30% to 50%.
9. display device as claimed in claim 6, it is characterised in that described display floater lights elemental area percentage ratio when lighting area percentage more than described second, and the brightness of described display floater reduces according to one second ratio.
10. display device as claimed in claim 9, it is characterised in that described second ratio is between 0.74 and 0.55.
11. a display device, it is characterised in that described display device includes:
One display floater; And
One drives module, electrically connects with described display floater, and drives described display floater show image,
Wherein, described display floater is lighted the power consumption of area percentage and described display floater and is had a curve, described curve has one first slope in less than 1 first when lighting area percentage, described curve has one second slope in time lighting area percentage more than described first, and the absolute value of described second slope is not equal to the absolute value of described first slope.
12. display device as claimed in claim 11, it is characterised in that described first lights area percentage between 0% to 30%.
13. display device as claimed in claim 11, it is characterised in that the absolute value of described second slope is less than the absolute value of described first slope.
14. display device as claimed in claim 11, it is characterized in that, described curve has one the 3rd slope in more than 1 second when lighting area percentage, described 3rd slope and described second slope differ, and described second lights area percentage lights area percentage more than described first.
15. display device as claimed in claim 14, it is characterised in that the absolute value of described 3rd slope is less than the absolute value of described second slope.
16. display device as claimed in claim 14, it is characterised in that described second lights area percentage between 30% to 50%.
17. a display device, it is characterised in that described display device includes:
One display floater; And
One drives module, electrically connects with described display floater, and drives described display floater show image,
Wherein, when described display floater shows that the power consumption that picture is static image shows between the power consumption that picture is movie or television picture and the power consumption that described display floater display picture is webpage between described display floater.
18. display device as claimed in claim 17, it is characterised in that described display floater display picture is the average power consumption of webpage, shows that picture all shows the 75% of the power consumption of white for described display floater.
19. display device as claimed in claim 17, it is characterised in that described display floater display picture is the average power consumption of static image, shows that picture all shows the 23% of the power consumption of white for described display floater.
20. display device as claimed in claim 17, it is characterised in that described display floater display picture is the average power consumption of movie or television picture, shows that picture all shows the 20% of the power consumption of white for described display floater.
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| CN104699438B (en) * | 2015-03-24 | 2018-01-16 | 深圳市华星光电技术有限公司 | The apparatus and method handled the picture to be shown of OLED display |
| TWI560647B (en) * | 2015-09-16 | 2016-12-01 | Au Optronics Corp | Displaying method and display panel utilizing the same |
| CN109377941B (en) * | 2018-12-21 | 2020-09-01 | 深圳市华星光电半导体显示技术有限公司 | Image display device and image display adjusting method |
| US10714003B1 (en) * | 2019-01-03 | 2020-07-14 | Himax Technologies Limited | Image processing method and image processing system |
| CN111933082B (en) * | 2020-09-03 | 2022-11-29 | 京东方科技集团股份有限公司 | Method for improving low gray scale image quality and display device |
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| CN103578391B (en) | 2016-02-17 |
| CN103578391A (en) | 2014-02-12 |
| CN105632406B (en) | 2018-07-24 |
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