CN100533523C - Plasma display brightness regulating device and method thereof - Google Patents
Plasma display brightness regulating device and method thereof Download PDFInfo
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- CN100533523C CN100533523C CN 200510124094 CN200510124094A CN100533523C CN 100533523 C CN100533523 C CN 100533523C CN 200510124094 CN200510124094 CN 200510124094 CN 200510124094 A CN200510124094 A CN 200510124094A CN 100533523 C CN100533523 C CN 100533523C
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Abstract
The invention provides a brightness adjustment device which is applicable to plasma display. The brightness adjustment device includes brightness controller, gray degree controller and power controller. Brightness controller is to generate gray adjustment signal and power adjustment signal. Gray degree controller is to receive first brightness video signal and gray adjustment signal, then adjust the video signal according to the gray adjustment signal and output the adjusted signal. Power controller is to receive adjusted signal and power adjustment signal and adjust the power, then output the sub-graph field control signal. In the adjustment of brightness, the same scene level of the images is maintained.
Description
Technical field
The present invention relates to the brightness adjusting device and the method thereof of plasma display, and be particularly related to the brightness adjustment mode of keeping the original picture stereovision of plasma display and reducing power consumption.
Background technology
Existing display device mainly can be divided into two big kinds, a kind ofly is to use cathode-ray tube (CRT) (cathoderay tube, display CRT), another kind then are flat-panel monitor (flat panel display).Because it is light, thin that the display of flat-panel monitor ratio use cathode-ray tube (CRT) comes, and have again display image indeformable, be not subjected to characteristics such as magnetic interference, therefore in the market of display, replace old cathode-ray tube display gradually, and become at present at commodity in great demand on the market.
Comparatively common on the market flat-panel monitor mainly contain LCD (liquid crystaldisplay, LCD) with plasma display (plasma display panel, PDP) etc.The plasma display technology principle is the ultraviolet ray that is produced when utilizing noble gas discharge, excite color phosphor after, be converted to the acceptable visible light of human eye again.Wherein plasma display is better than the LCD part and is to make large-area display screen, therefore has its specific application market to exist, and in addition, plasma display has the visual angle in addition than advantages such as broadness and life-span are long.
In known technology, when plasma display is adjusted in brightness, often to turn down gray scale to achieve the goal, as shown in Figure 1.This known method is under the constant drain powertrace, and gray scale is turned down, and sacrifices the stereovision of whole picture.In addition,, when reducing brightness, still consuming constant power, therefore failing in good time saving consumed power because powertrace is constant.
From the above, be the stereovision of keeping whole picture and in good time raising energy use efficiency, the present invention will provide solution.
Summary of the invention
The purpose of this invention is to provide a kind of brightness adjusting device and method, so that when adjusting the brightness of display, do not sacrifice the picture stereovision.
Another object of the present invention provides a kind of brightness adjusting device and method, makes when the brightness of turning down display, can reduce the consumed power of display simultaneously.
The invention provides a kind of brightness adjusting device, be applicable to plasma display, this brightness adjusting device comprises brightness controller, gray scale adjuster and power controller.Brightness controller is to adjust signal and power adjustment signal in order to output gray level.The gray scale adjuster is to adjust signal in order to receive first luminance video signal and gray scale, after this first luminance video signal adjusts according to gray scale adjustment signal, and signal after the adjustment of output video gray scale.Power controller is to adjust signal in order to signal and power after the adjustment of receiver, video gray scale, after signal is adjusted the adjustment of signal power according to power after this video gray scale adjustment, and output subgraph field control signal.
According to the present invention's preferred embodiment, this first luminance video signal is adjusted the translation adjustment that is adjusted into linearity that signal is done according to gray scale.
According to the present invention's preferred embodiment, this first luminance video signal is adjusted the nonlinear translation adjustment that is adjusted into that signal does according to gray scale.
According to the present invention's preferred embodiment, this video gray scale is adjusted signal and is adjusted the work rate adjustment of signal institute according to power, is to adjust power consumption, to reach the effect that brightness is adjusted.
According to another preferred embodiment of the present invention, this video gray scale is adjusted signal and is adjusted the work rate adjustment of signal institute according to power, is to keep pulsed frequency with adjustment, to reach the effect that brightness is adjusted.
According to the present invention's embodiment, wherein power controller comprises display rate adjuster and automatic power controller.The display rate adjuster is adjusted signal and is converted display rate adjustment signal in order to received power.Automatic power controller is connected to the display rate adjuster, adjusts signal in order to receive display rate, and utilizes display rate to adjust signal, required consumed power and brightness when adjusting the video gray scale that is received and adjusting the demonstration of signal, and output subgraph field control signal.
Wherein, keep pulsed frequency when this automatic power controller will be adjusted signal deciding and show according to the display rate that received in an embodiment, to keep pulsed frequency high more when demonstration, and corresponding power is big more.
In another embodiment, keep pulsed frequency when this automatic power controller is adjusted signal deciding and shown according to the display rate that received, when keeping pulsed frequency when identical, display rate is high more, and corresponding power is big more.
According to the present invention's a embodiment again, it also comprises subgraph field processor and plasma display module, and this subgraph field processor is connected to plasma display module, and receives the adjusted signal of brightness (power), with the brightness demonstration of control plasma display module.
According to another embodiment of the present invention, it also comprises sensor, and this sensor is connected to brightness controller, and adjusts the brightness control signal of brightness controller automatically according to extraneous brightness.
The invention provides a kind of luminance regulating method, be applicable to plasma display.This luminance regulating method comprises the following steps.At first, receive first luminance video signal and gray scale and adjust signal, after this first luminance video signal was done linear or non-linear adjustment according to gray scale adjustment signal, the output video gray scale was adjusted signal.Subsequently, received power is adjusted signal and is adjusted signal with the video gray scale, after the video gray scale is adjusted signal and adjusted the adjustment of signal power according to power, exports adjusted subgraph field and keeps the signal of pulsed frequency.
According to the present invention's preferred embodiment, this video gray scale is adjusted signal and is adjusted the work rate adjustment of signal institute according to power, is to adjust power consumption, to reach the effect that brightness is adjusted.
According to another preferred embodiment of the present invention, this video gray scale is adjusted signal and is adjusted the work rate adjustment of signal institute according to power, is to keep pulsed frequency with adjustment, to reach the effect that brightness is adjusted.
According to the present invention's embodiment, this power is adjusted signal can be by adjusting or extraneous brightness sensing and adjusting automatically manually.
The present invention makes under the indeclinable situation of picture stereovision because of having taked to adjust the mode that consumed power is adjusted brightness, adjusts the brightness of picture; And than low-light level the time, reduce the consumed power of display, in the hope of reaching the purpose of saving the energy.
State with other purpose, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and conjunction with figs. elaborate.
Description of drawings
Fig. 1 is that known technology ionic medium display brightness is adjusted mode.
Fig. 2 adjusts mode for the brightness of ionic medium display of the present invention.
The principle that Fig. 3 is applied to for the brightness adjustment.
Fig. 4 is the schematic block diagram of brightness adjusting device.
Fig. 5 adjusts synoptic diagram for brightness to the slope of gray scale.
Fig. 6 is the internals block scheme of power controller 300.
Fig. 7 is the process flow diagram of brightness control method.
The main element description of symbols
100: brightness controller
200: the gray scale adjuster
300: power controller
310: the display rate adjuster
320: automatic power controller
400: the subgraph field processor
500: plasma display module
510: scan line driver
520: the addressed line driver
530: Plasmia indicating panel
S
1: control signal
S
2: first luminance video signal
S
3: gray scale is adjusted signal
S
4: power is adjusted signal
S
5: the video gray scale is adjusted signal
S
6: subgraph field control signal
S
7: the scan-data signal
S701: receive first luminance video signal and gray scale and adjust signal
S702: linearity or nonlinear gray adjustment
S703: first luminance video signal is adjusted signal according to gray scale and is done linear the adjustment
S704: first luminance video signal is adjusted signal according to gray scale and is done non-linear adjustment
S705: the output video gray scale is adjusted signal
S706: received power adjusts signal and this video gray scale is adjusted signal
S707: adjust power consumption or adjustment and keep pulsed frequency f
s
S708: output subgraph field control signal
Embodiment
The preferable feature of embodiment chosen of the present invention will explain with reference to accompanying drawing.The present invention's spirit and scope are not limited to selected these embodiment as illustrative purposes.It should be noted that these accompanying drawings should not be considered as any specific size or ratio.In the present invention's scope, hereinafter described any structure and material all can suitably be changed.
As shown in Figure 2, the present invention has designed a kind of brightness and has adjusted function, makes that the stereovision of picture still is maintained, and also can reduce power consumption when brightness is turned down when the brightness of making plasma display is adjusted.Its method is different from the known technology part and is power is made change to the curve of display rate itself, and just when brightness was turned down, power is to the just downward revision of curve of display rate, and was same, and when brightness was heightened, power was just upwards revised the curve of display rate.Hence one can see that, the adjustment of brightness will be accompanied by consumed power change but not in the known technology, the variation of simple gray-level.
The principle of Fig. 3 for being applied in brightness control method one preferred embodiment of the present invention.The method according to power adjustment adjust the curve of the power of image itself to display rate.Will be among the figure with 250 watts and 230 watts keep pulse (sustain pulse) frequency f
sCurve to display rate explains, and finerly keeps pulsed frequency f with modulation
sOr display rate obtains desired brightness effects.
As shown in Figure 3, when power is turned down to 230 watt-hours by 250 watts, under identical display rate, 250 watts of pairing pulsed frequency f that keep
1Be higher than 230 watts of pairing pulsed frequency f that keep
2, that is to say, when under same picture, desiring to keep identical display rate, can obtain on 230 watts of powertrace than the low pulsed frequency f that keeps that operates on 250 watts of powertrace
1'.In addition, under same picture, keep under the pulsed frequency identical, Fig. 3 has also presented the phenomenon of 250 watts of powertrace than 230 watts of higher display rates of powertrace, therefore the present invention is when increasing brightness and improving power consumption, also can increase the brightness of picture, and keep grey originally.
As shown in the above, when doing the brightness adjustment, can adjust power consumption, keep pulsed frequency f with adjustment
sAs foundation, so that under different brightness, keep the quality of image frame.
With reference to shown in Figure 3, just keep pulsed frequency f with adjustment
sBe example, under identical display rate, keep pulsed frequency by f
1Change into f
2The time, consumed power is reduced to 230 watts by 250 watts, thereby reaches the effect of saving the energy.To adjust power consumption is example, is f keeping pulsed frequency equally
2The time, consumed power is if increase to 250 watts by 230 watts, and display rate will improve relatively, therefore increase the brightness of original picture.
Fig. 4 is the schematic block diagram of brightness adjusting device, is the gray scale intensities treatment mechanism of exemplary embodiments of the present invention shown in the figure.
With reference to shown in Figure 4, this brightness adjusting device comprises brightness controller 100, gray scale adjuster 200, power controller 300, subgraph field processor 400 and plasma display module 500.
At first, brightness controller 100 obtains extraneous control signal S
1, at this moment, the first luminance video signal S
2Input gray level adjuster 200, brightness controller 100 then output gray level are adjusted signal S
3Adjust signal S with power
4Subsequently, gray scale is adjusted signal S
3Input to gray scale adjuster 200, make the luminance video signal S that wins
2After linear or nonlinear adjustment, the output video gray scale is adjusted signal S
5, this video gray scale is adjusted signal S
5Adjust signal S with power
4 Power input controller 300 all then, and the video gray scale is adjusted signal S
5Then adjust signal S according to power
4After power is adjusted, produce subgraph field control signal S
6, receive and produce by subgraph field processor 400 again and drive the required scan-data signal S of plasma display module 500
7
The internals of plasma display module 500 comprises scan line driver 510, addressed line driver 520 and Plasmia indicating panel 530, and wherein scan line driver 510 and addressed line driver 520 are responsible for driving each pixel unit circuit in the Plasmia indicating panel 530.
Above-mentioned control signal S
1Can be by the adjustment of operating brightness manually, or by sensor to external world brightness induction and change automatically.With a preferred embodiment is example, and the user can adjust the slope of brightness to gray scale according to the personal like by the pattern of manual adjustment.As shown in Figure 5, within certain grey, this figure is an example with 255 grades, adjusts the slope of brightness to gray scale.When heightening brightness, increase slope, and when turning down brightness, reduce slope.
With another preferred embodiment is example, if be connected to brightness controller 100 with the sensor (not shown) earlier, then can utilize sensor light sensing situation to external world itself, under self-adjusting pattern, carry out the action of above-mentioned change brightness, can obtain keeping the effect of image picture quality equally the gray scale slope.
Fig. 6 be power controller 300 the internals block scheme and with the annexation of periphery, this power controller 300 comprises display rate adjuster 310 and automatic power controller 320.
This display rate adjuster 310 receives from the power of brightness controller 100 adjusts signal S
4, again power is adjusted signal S to the curve of display rate according to power
4Adjust, and with this information input automatic power controller 320, automatic power controller 320 just can be adjusted signal S with the video gray scale
5Convert subgraph field control signal S to
6, and input subgraph field processor 400.
The process steps that Fig. 7 takes for one of brightness control method of the present invention preferred embodiment.At first, receive first luminance video signal and gray scale and adjust signal S701, judge it is to do the gray scale translation with linear or nonlinear mode to adjust S702 again, according to the result who judges first luminance video signal is adjusted signal according to gray scale respectively again and be linear or nonlinear adjustment S703/S704, just export the video gray scale that is produced afterwards and adjust signal S705, next step is that received power is adjusted signal and the video gray scale is adjusted signal S706, (keeps pulsed frequency f to adjust power consumption again
s) power adjusts S707, again the video gray scale is adjusted signal and adjusted signal power consumption adjustment according to power and do and keep pulsed frequency f
sAdjust the subgraph field control signal S708 that last output is again produced.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any person of ordinary skill in the field; without departing from the spirit and scope of the invention; when can doing a little change and improvement, so the present invention's protection domain is as the criterion when looking the claim person of defining.
Claims (14)
1. a brightness adjusting device is applicable to plasma display, it is characterized in that this brightness adjusting device comprises:
Brightness controller is adjusted signal and power adjustment signal in order to output gray level;
The gray scale adjuster is adjusted signal in order to receive first luminance video signal and this gray scale, and after this first luminance video signal adjusted according to this gray scale adjustment signal, the output video gray scale was adjusted signal; And
Power controller, this video gray scale is adjusted signal and this power is adjusted signal in order to receive, after this video gray scale adjustment signal is adjusted the adjustment of signal power according to this power, output subgraph field control signal.
2. brightness adjusting device according to claim 1 is characterized in that this first luminance video signal is adjusted into the linear translation adjustment according to what this gray scale adjusted that signal does.
3. brightness adjusting device according to claim 1 is characterized in that this first luminance video signal adjusts the non-linear translation adjustment that is adjusted into that signal does according to this gray scale.
4. brightness adjusting device according to claim 1 is characterized in that this power adjustment that this video gray scale adjustment signal is done according to this power adjustment signal, is to adjust power consumption to reach the effect that brightness is adjusted.
5. brightness adjusting device according to claim 1 is characterized in that this power adjustment that this video gray scale adjustment signal is done according to this power adjustment signal, is to keep pulsed frequency to reach the effect that brightness is adjusted with adjustment.
6. brightness adjusting device according to claim 1 is characterized in that this power controller comprises:
The display rate adjuster is adjusted signal and is converted display rate adjustment signal in order to receive this power; And
Automatic power controller is connected to this display rate adjuster, adjusts signal in order to receive this display rate, and utilizes this display rate to adjust signal, adjusts the pulsed frequency of keeping that this video gray scale that is received is adjusted signal, to export this subgraph field control signal.
7. brightness adjusting device according to claim 1, it is characterized in that also comprising subgraph field processor and plasma display module, this subgraph field processor is connected to this plasma display module, and receives this subgraph field control signal, shows with the brightness of controlling this plasma display module.
8. brightness adjusting device according to claim 1 is characterized in that also comprising sensor, and this sensor electrical is connected to this brightness controller, and adjusts this brightness controller automatically according to extraneous brightness.
9. a luminance regulating method is applicable to plasma display, it is characterized in that this luminance regulating method comprises the following steps:
Receive first luminance video signal and gray scale and adjust signal, after this first luminance video signal adjusted according to this gray scale adjustment signal, the output video gray scale was adjusted signal; And
Received power adjusts signal and this video gray scale is adjusted signal, after this video gray scale adjustment signal is adjusted the adjustment of signal power according to this power, and output subgraph field control signal.
10. luminance regulating method according to claim 9 is characterized in that this first luminance video signal is adjusted into the linear translation adjustment according to what this gray scale adjusted that signal does.
11. luminance regulating method according to claim 9 is characterized in that this first luminance video signal adjusts the non-linear translation adjustment that is adjusted into that signal does according to this gray scale.
12. luminance regulating method according to claim 9 is characterized in that adjusting signal according to this power adjusts power consumption, to reach the effect that brightness is adjusted.
13. luminance regulating method according to claim 9 is characterized in that adjusting signal according to this power adjusts and keep pulsed frequency, to reach the effect that brightness is adjusted.
14. luminance regulating method according to claim 9 is characterized in that this power adjustment signal adjustment automatically by extraneous brightness sensing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510124094 CN100533523C (en) | 2005-11-28 | 2005-11-28 | Plasma display brightness regulating device and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510124094 CN100533523C (en) | 2005-11-28 | 2005-11-28 | Plasma display brightness regulating device and method thereof |
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|---|---|
| CN1975830A CN1975830A (en) | 2007-06-06 |
| CN100533523C true CN100533523C (en) | 2009-08-26 |
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|---|---|---|---|
| CN 200510124094 Expired - Fee Related CN100533523C (en) | 2005-11-28 | 2005-11-28 | Plasma display brightness regulating device and method thereof |
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| CN105741765B (en) * | 2016-04-06 | 2018-06-26 | 康佳集团股份有限公司 | A kind of Poewr control method of display device, system and smart television |
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Non-Patent Citations (2)
| Title |
|---|
| 彩色等离子体显示器灰度校正方法研究. 张小宁，沈思宽，张军，刘纯亮.西安交通大学学报，第37卷第4期. 2003 |
| 彩色等离子体显示器灰度校正方法研究. 张小宁，沈思宽，张军，刘纯亮.西安交通大学学报，第37卷第4期. 2003 * |
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Owner name: CPT TECHNOLOGY (GROUP) CO., LTD. Free format text: FORMER OWNER: CHINA PROJECTION TUBE CO., LTD. Effective date: 20130718 |
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Effective date of registration: 20130718 Address after: 350000, No. 1, building 6, building No. third, fourth, Confucian Road West, Mawei District, Fujian, Fuzhou Patentee after: CPT DISPLAY TECHNOLOGY (SHENZHEN)CO., LTD. Address before: Taiwan, Taipei, China Zhongshan North Road three paragraph twenty-two Patentee before: Chunghwa Picture Tubes Ltd. |
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Granted publication date: 20090826 Termination date: 20191128 |