CN103617780A - AMOLED display screen drive circuit and nonlinear interpolation construction method thereof - Google Patents
AMOLED display screen drive circuit and nonlinear interpolation construction method thereof Download PDFInfo
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Abstract
The invention relates to an AMOLED voltage-mode display screen drive circuit and a nonlinear interpolation construction method thereof. The AMOLED voltage-mode display screen drive circuit comprises a time schedule controller, a data processing circuit, a gamma correction circuit and a nonlinear interpolation and buffer circuit. The data processing circuit receives sequential control signals and serial image data, converts the serial image data to parallel data in line, and transmits the parallel data to the nonlinear interpolation and buffer circuit. The gamma correction circuit generates M-level gray level voltages according to a gamma correction curve, the nonlinear interpolation and buffer circuit receives the gray level voltages and the image data and generates N-position gray level voltages to drive a display screen. According to the AMOLED voltage-mode display screen drive circuit and the nonlinear interpolation construction method thereof, a complex circuit structure is not introduced, the nonlinear interpolation and buffer circuit is used for carrying out nonlinear interpolation on gamma correction circuit M-position output reference electric potential, the gamma correction circuit M-position output reference electric potential can be well matched with the gamma correction curve, and therefore higher gray level electric potential display accuracy can be achieved.
Description
Technical field
The present invention relates to organic light-emitting diode display technical field, be specifically related to the building method of a kind of AMOLED voltage mode display drive circuit and gradation potential non-linear interpolation.
Background technology
Organic Light Emitting Diode (Organic Light Emitting Diode, hereinafter to be referred as OLED) display technique is under the effect of electric field, and organic semiconductor and luminous organic material are carried out to carrier injection and compound and cause its luminous technology.Apply the display of this technology, be OLED display.OLED is as novel light-emitting technology, there is autoluminescence, visual angle is wide, the reaction time is short, luminescence efficiency is high, operating voltage is low, panel is thin, can make large scale with can flexing etc. characteristic.Other display techniques compared to current main flow, as LCD, light-emitting diode display etc., all have obvious advantage in many aspects.
Active Matrix OLED (AMOLED) voltage mode driving circuit is converted into corresponding gray shade scale current potential by viewdata signal, and relation transfers to display screen to drive its normal operation chronologically.When using viewdata signal to drive display screen, the voltage/gray-tone response feature showing due to OLED presents non-linear, causes screen display distortion, therefore by gamma correction curve, viewdata signal current potential is compensated.The AMOLED voltage mode display drive circuit of current high color depth adopts primary and secondary two-stage digital-to-analog conversion (DAC) circuit structure for example, to realize n bit (n=8) gray shade scale current potential structure mostly, is to adopt linear secondary DAC.Its overall framework as shown in Figure 1.The M(M=2 of linear secondary DAC to gamma correction circuit
n-2+ 2 ,-2 in index reflected interpolation density, and interpolation density is 2 bits) a level output reference potential carries out linear interpolation, forms N(N=2
n) level gray shade scale current potential.The reference potential producing due to linear interpolation has departed from gamma correction curve, and each gray shade scale current potential of driving circuit output has larger error.
Summary of the invention
The present invention is directed to prior art for the problem of AMOLED voltage mode driving circuit gray shade scale current potential precision deficiency, a kind of method of gradation potential non-linear interpolation structure is provided, and a kind of new AMOLED voltage mode driving circuit.
A kind of AMOLED display screen grey grade current potential non-linear interpolation building method provided by the invention, the M level gamma corrected voltage producing from gamma correction circuit, extract 3 adjacent gray shade scale current potential VL, VM, VH, as with reference to voltage, VH>VM>VL wherein.In gray shade scale-data voltage plane, construct one by the nonlinear curve of these 3 reference point of potentials, getting the data voltage that inserts gray shade scale position on this nonlinear curve is corresponding gray shade scale current potential.
A kind of AMOLED voltage mode driving circuit provided by the invention, comprising: sequential control circuit 1, data processing circuit 2, gamma correction circuit 3, non-linear interpolation and buffer circuits group 4.
Described sequential control circuit 1 produces timing control signal and transfers to other each circuit unit, to keep all circuit units to work chronologically.
Described data processing circuit 2 receives n bit serial viewdata signal s1, is converted into K road n bit parallel signal s2, and according to timing control signal, parallel viewdata signal is transferred to non-linear interpolation and buffer circuits group 4.Above-mentioned data processing circuit 2 is by going here and there and changing, and the All Datarows that belongs to same frame in the view data of serial transmission is exported at one time by parallel interface.
Described gamma correction circuit 3 produces M level reference gray level grade current potential, is transferred to non-linear interpolation and buffer circuits group 4.
Described non-linear interpolation and buffer circuits group 4, according to the quantity K of display screen source channel, each non-linear interpolation of passage configuration and buffer circuits 4_i(i=1,2 ..., K).Non-linear interpolation and buffer circuits 4_i are according to the gray shade scale G of the n bit image data signal potential representative of this passage, the M level reference gray level grade current potential producing from described gamma correction circuit 3, select and hithermost 3 the adjacent reference gray level grade current potential VL of gray shade scale G, VH, VM, for example, by non-linear interpolation method (parabola interpolation), obtain the driving voltage corresponding with this viewdata signal current potential, output to OLED display screen.
The linear interpolation building method that interpolation building method of the present invention is more general has higher interpolation accuracy, has higher picture disply quality.Driving circuit of the present invention carries out non-linear interpolation by non-linear interpolation and buffer circuits to gamma correction circuit M level output reference potential, and matched well between gamma correction curve, realizes gradation potential display precision more accurately.
Accompanying drawing explanation
Fig. 1 is AMOLED voltage mode display drive circuit prior art scheme
Fig. 2 is the contrast of non-linear interpolation method provided by the invention and linear interpolation and desirable gamma correction curve
Fig. 3 is the error contrast of non-linear interpolation method provided by the invention and linear interpolation
Fig. 4 is that AMOLED voltage mode display screen of the present invention drives overall frame structure figure
Fig. 5 is the structural representation of data processing circuit
Fig. 6 is a kind of embodiment of gamma correction circuit
Fig. 7 is the gamma correction circuit group schematic diagram that comprises a plurality of gamma correction circuits and a time division multiplex selector switch
Fig. 8 is the structural representation of non-linear interpolation of the present invention and buffer circuits
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
The scheme of prior art shown in Fig. 1, the AMOLED voltage mode display drive circuit of high color depth comprises sequential control circuit 1, data processing circuit 2, gamma correction circuit 3, linear interpolation and buffer circuits group 40.Wherein adopt gamma correction circuit 3 as non-linear one-level DAC, adopt one group of linear interpolation and buffer circuits 40_i(i=1,2 ..., K, K is display screen source electrode quantity) as secondary DAC.
As shown in Figure 2, a kind of AMOLED display screen grey current potential non-linear interpolation building method provided by the invention, the M level gamma corrected voltage producing from gamma correction circuit, extract 3 adjacent gray shade scale current potentials, as with reference to voltage, in gray shade scale-output voltage plane, construct one by the nonlinear curve of these 3 reference point of potentials, getting the data voltage that inserts gray shade scale position on this nonlinear curve is corresponding gray shade scale current potential.This current potential VOUT be these 3 reference potentials special ratios and, by controlling the scale-up factor of reference voltage, obtain.Take polynomial interpolation method as example, it constructs one by the para-curve of these 3 reference point of potentials in gray shade scale-data voltage plane, getting the data voltage that inserts gray shade scale place on this para-curve is corresponding gray shade scale current potential, and this voltage can obtain by 3 adjacent gray shade scale current potentials are dwindled and are added by particular factor.
For example, in n bit image data signal, if interpolation density is 2 bits, desirable its high bit (n-2) Bit data BH, the gray shade scale corresponding gamma corrected voltage represented compared with the viewdata signal current potential of low data BL=00.According to this viewdata signal current potential BH00, continuous two current potential VM, the VH that in M level reference potential, choose corresponding reference gray level grade current potential VL and be adjacent, totally 3 reference potentials, wherein VH>VM>VL.For example the high-order BH=000000 of data current potential selects and immediate 3 the gray shade scale current potential V0 of gray shade scale 0, V4, V8; The high-order BH=000001 of data current potential selects and immediate 3 the gray shade scale current potential V4 of gray shade scale 4, V8, V12, the like.
In view data compared with the determined position of low data BL (this position between VH and VM, and determined by interpolation density),, the data voltage of getting on this para-curve is corresponding gray shade scale current potential, has
VOUT(BL)=coefficient 1 * VH+ coefficient 2 * VM-coefficient 3 * VL (formula 1)
Wherein, coefficient 1, coefficient 2, coefficient 3 are determined by concrete interpolation algorithm, and coefficient 1+ coefficient 2-coefficient 3=1
For example, by quadratic polynomial interpolation method, calculate and can draw:
VOUT(11)=21/32×VH+7/16×VM–3/32×VL
VOUT(10)=3/8×VH+3/4×VM–1/8×VL
V?OUT(01)=5/32×VH+15/16×VM–3/32×VL
As shown in Figure 3, this interpolation building method is compared and is had higher interpolation accuracy with linear interpolation building method, has higher picture disply quality.Simulation results DNL and INL are respectively 0.57LSB and 0.50LSB, and be 6.6 μ s stabilization time (0.2%).
Fig. 4 is a kind of AMOLED voltage mode display drive circuit of the present invention, comprises sequential control circuit 1, data processing circuit 2, gamma correction circuit 3 and non-linear interpolation and buffer circuits group 4.
Described sequential control circuit 1 produces timing control signal according to clock signal and transfers to data processing circuit 2 and gamma correction circuit 3, to guarantee that it correctly exports data chronologically.
Described data processing circuit 2 receives n bit serial viewdata signal s1, is converted into K road n bit parallel viewdata signal s2, according to timing control signal, described parallel image data-signal s2 is transferred to non-linear interpolation and buffer circuits group 4.Described data processing circuit 2 receives the timing control signal of sequential control circuit 1, and by going here and there and changing, the All Datarows that belongs to same frame in the view data that serial mode is transmitted outputs to next stage circuit from parallel interface at one time.
As shown in Figure 5, described data processing circuit 2 comprises shift register 201, sample latch 202, keeps latch 203 and level displacement shifter 204.
The present invention can be used for the miniature control module of MCU() interface modes, MDD(mobile display data) interface modes and rgb interface pattern etc., above-mentioned three kinds of application models adopt respectively existing techniques in realizing MCU data processing circuit 21, MDD data processing circuit 22, RGB data processing circuit 23, and three's difference is to process content and/or the sequential difference of input signal.
Take rgb interface pattern as example, RGB data processing circuit 23 receives timing control signal and the serial RGB viewdata signal of sequential control circuit 1, and the rgb image data signal of serial input is converted to parallel data-signal, with the time-multiplexed form of RGB in accordance with regulations sequential transfer to respectively non-linear interpolation and buffer circuits group 4.
Described gamma correction circuit 3 produces M level reference gray level grade current potential, is transferred to non-linear interpolation and buffer circuits group 4.
The concrete structure that Fig. 6 comprises gamma correction circuit 3, for example a kind of gamma correction circuit 31, comprises first order ladder resistance 311, gamma amplitude correction selector switch 312 and second level ladder resistance 313.First order ladder resistance 311 is the ladder resistance through overcorrect according to reference voltage and resistance value, produces 4 candidates' the highest gray shade scale current potential V0R and 4 the minimum gray shade scale current potential of candidate V260R.Candidate's current potential of the highest gray shade scale current potential and minimum gray shade scale current potential is transferred to respectively two gamma amplitude correction selector switchs 312, and selector switch 312 is chosen respectively one according to amplitude correction signal R0 and R1 and is sent to second level ladder resistance 313 as its reference gray level grade current potential from 4 candidate's current potentials.Described second level ladder resistance 313 receives respectively high-order gray shade scale reference voltage and low level gray shade scale reference voltage from two gamma amplitude correction selector switchs 312, and the dividing potential drop between two reference voltages produces 64 gray shade scale current potentials (take n=8, interpolation density be example for 2 bits) of V4R, V8R to V256R by nonlinear ladder resistance.Together with V0R and V260R, totally 66 reference potentials are exported together.
Fig. 7 is gamma correction circuit group 30 schematic diagram that comprise a plurality of gamma correction circuits and a time division multiplex selector switch.Wherein said gamma correction circuit 3 can be a plurality of, and for example gamma correction circuit 31,32,33, now also has a time division multiplex selector switch 34.A plurality of correcting circuits produce respectively M position reference gray level grade current potential, and transmit it to time division multiplex selector switch 34.Time division multiplex selector switch 34 is the output signal selection to a plurality of gamma correction circuits 31,32,33 according to the control signal of sequential control circuit, each M position voltage of exporting from a plurality of correcting circuits at times, select wherein one group and export, be transferred to non-linear interpolation and buffer circuits group 4.
Take rgb interface pattern as example, and described gamma correction circuit group 30 couples of R, G, B signal respectively provide a gamma correction circuit 31,32,33.Each correction amplitude is different, i.e. R, G, corresponding three the different calibration curves of B.Although circuit structure is the same, wherein the resistance of resistance is different.For example in 31, amplitude correction signal is R0 and R1, is G0 and G1 in 32, is B0 and B1 in 33.Time division multiplex selector switch 34 selects that corresponding with sequential to export in R, G, a B3 signal, for example, in one-period, first export R data, then export G data, finally exports B data.Fig. 8 is a kind of AMOLED voltage mode display drive circuit of the present invention, for rgb interface pattern, comprises sequential control circuit 1, RGB data processing circuit 23, gamma correction circuit group 30 and non-linear interpolation and buffer circuits group 4.
In the various embodiments described above, each non-linear interpolation and buffer circuits 4_i(i=1 in described non-linear interpolation and buffer circuits group 4,2, K, K is display screen source electrode quantity) all as shown in Figure 9, comprise current potential selector switch 41, noble potential interpolating unit 42, electronegative potential interpolating unit 43, electric current summing circuit 44 and output buffer 45.The function of each several part is: current potential selector switch 41 is selected 3 reference voltage VH, VM, VL in M step voltage; Noble potential interpolating unit 42 is determined VH, the basic proportionate relationship of VM two current potentials and output voltage, and be converted into electric current; Electronegative potential interpolating unit 43 is used VM, and VL two voltages are proofreaied and correct output voltage, on the determined ratio of module 42 basis, output voltage VO UT are carried out to adjustment by a small margin, finally to realize non-linear interpolation.Electric current summing circuit 44 modules are by current summation, to realize the combination of 42,43 these two module acquired results; Output buffer 45 is converted to voltage again by the electric current obtaining after being added, and exports next stage circuit to.
Current potential selector switch 41 receives the M level reference gray level grade electric potential signal of gamma correction circuit 3 and the viewdata signal of data processing circuit 2, in M level input current potential, choose immediate 3 the gray shade scale potential value VL of the gray shade scale represented with picture signal, VM, VH, it is transferred to respectively to noble potential interpolating unit 42 and electronegative potential interpolating unit 43.
Because the feature of interpolation coefficient, is shown in formula 1, it is larger that insertion voltage is affected by VH, VM, and noble potential interpolating unit 42 completes the conversion of this noble potential, and sets up the relation between VH, VM, these 3 current potentials of VOUT; And insert voltage, affected by VL less, and electronegative potential interpolating unit 43 completes the conversion of electronegative potential, and it is input as two of VL and VM, introduces the impact of electronegative potential by inserting a little electric current, carries out the adjustment of output voltage.
Described noble potential interpolating unit 42 is higher two reference gray level grade current potential (VH from 3 reference voltages of current potential selector switch 41 its extractions of reception, VM), from data processing circuit 2, receive 2 bit image data compared with low level signal BL, respectively by two reference gray level grade current potential (VH, VM) be converted into electric current, and according to the difference of insertion position, in the parameter of non-linear insertion, carry out ratio adjusting to transforming the electric current obtaining.Insertion position is definite compared with low level signal BL by view data.Ratio regulates the current control module by described noble potential interpolating unit 42 inside to realize.With reference to voltage transitions, be after electric current, directly by current control module, zoom in or out in proportion, the coefficient zooming in or out is to change under compared with the control of low level signal BL in view data.From output buffer 45, receive output voltage signal VOUT to form negative feedback.Output current Ivi as shown in Equation 2.
Ivi/g=coefficient 1 * VH+(coefficient 2 – coefficients 3) * VM – VOUT (formula 2)
Described electronegative potential interpolating unit 43 receives two lower reference gray level grade current potential (VM its 3 adjacent reference voltages that extract from current potential selector switch 41, VL), and receive 2 bit image data compared with low level BL signal (identical with 42 modules) from data processing circuit 2, these two adjacent reference potentials are carried out to voltage and to the rear enforcement ratio of the conversion of electric current, regulate, the coefficient that ratio regulates is to change under compared with the control of low level signal BL in view data.The output current Iic obtaining is transferred to electric current summing circuit 44, as shown in Equation 3.
Iic/g=coefficient 3 * (VM – VL) (formula 3)
Described electric current summing circuit 44 receives output current from noble potential interpolating unit 42 and electronegative potential interpolating unit 43 respectively.Described output buffer 45 is from electric current summing circuit 44 received current signals, and output buffer 45 provides current-voltage translation function, by current conversion, is output voltage VO UT, and the load capacity to next stage circuit is also provided.Export VOUT to AMOLED voltage mode display screen to drive its normal operation.Described electric current summing circuit 44 output current I44, as shown in Equation 4.
I44/g=Ivi/g+Iic/g=coefficient 1*VH+ coefficient 2*VM – coefficient 3*VL – VOUT (formula 4)
The coefficient of formula 2～4 is unified, and g is voltage/current conversion coefficient.
Making above-mentioned 44 output current I44 is zero, has formed the relativeness of formula 1.
Described non-linear interpolation and buffer circuits are different from the secondary DAC of general switching capacity, the secondary DAC of resistance string etc., adopt the secondary DAC structure of current-modulation, on the basis of linear interpolation structure, by the cooperation of noble potential interpolating unit and electronegative potential interpolating unit, complete special ratios relations different according to insertion position between output voltage and 3 reference voltages.This proportionate relationship can be followed and according to the difference of non-linear interpolation method, be changed to obtain best interpolation effect, has realized the secondary DAC of non-linear interpolation.
Claims (7)
1. an AMOLED display screen grey grade current potential non-linear interpolation building method, the M level gamma corrected voltage producing from gamma correction circuit, extract three adjacent gray shade scale current potential VL, VM, VH, as with reference to voltage, VH>VM>VL wherein, in gray shade scale-data voltage plane, construct one by the nonlinear curve of these 3 reference point of potentials, getting the data voltage that inserts gray shade scale position on this nonlinear curve is corresponding gray shade scale current potential.
2. AMOLED display screen grey grade current potential non-linear interpolation building method as claimed in claim 1, is characterized in that,
The step of extracting 3 adjacent gray shade scale current potentials the described M level gamma corrected voltage producing from gamma correction circuit is, in n bit image data signal, get its high bit (n-2) Bit data BH, the gray shade scale corresponding gamma corrected voltage represented compared with the viewdata signal current potential of low data BL=00, as with reference to gray shade scale current potential VL, and continuous two current potential VM, the VH that are adjacent, totally 3 reference potentials;
Describedly in gray shade scale-data voltage plane, construct a method by the nonlinear curve of these 3 reference point of potentials and be, in gray shade scale-data voltage plane, construct one by the para-curve of these 3 reference point of potentials;
The described data voltage that inserts gray shade scale position on this nonlinear curve of getting is that the method for corresponding gray shade scale current potential is, between VH and VM, in view data, compared with the determined gray shade scale of low data BL position, the data voltage of getting on this para-curve is corresponding gray shade scale current potential.
3. an AMOLED voltage mode driving circuit, comprising: sequential control circuit (1), data processing circuit (2), gamma correction circuit (3) or gamma correction circuit group (30), non-linear interpolation and buffer circuits group (4).
It is characterized in that,
Described sequential control circuit (1) produces timing control signal and transfers to other each circuit unit, to keep all circuit units to work chronologically;
Described data processing circuit (2) receives n bit serial viewdata signal (s1), be converted into K road n bit parallel viewdata signal (s2), and according to timing control signal, described parallel image data-signal (s2) transferred to non-linear interpolation and buffer circuits group (4).Described data processing circuit (2) is by going here and there and changing, and the All Datarows that belongs to same frame in the view data of serial transmission is exported at one time by parallel interface;
Described gamma correction circuit (3) produces M level reference gray level grade current potential, is transferred to non-linear interpolation and buffer circuits group (4);
Described non-linear interpolation and buffer circuits group (4), according to the quantity K of display screen source channel, each non-linear interpolation of passage configuration and buffer circuits (4_i).Described non-linear interpolation and buffer circuits (4_i) are according to the gray shade scale G of the n bit image data signal potential representative of this passage, the M level reference gray level grade current potential producing from described gamma correction circuit (3), select and hithermost 3 the adjacent reference gray level grade current potential VL of described gray shade scale G, VH, VM, by non-linear interpolation method, obtain the driving voltage corresponding with this viewdata signal current potential, output to OLED display screen.
4. AMOLED voltage mode driving circuit as claimed in claim 3, is characterized in that, described data processing circuit (2) is MCU data processing circuit (21).
5. AMOLED voltage mode driving circuit as claimed in claim 3, is characterized in that, described data processing circuit (2) is MDD data processing circuit (22).
6. AMOLED voltage mode driving circuit as claimed in claim 3, is characterized in that,
Described data processing circuit (2) is RGB data processing circuit (23);
Described gamma correction circuit group (30) comprises a plurality of gamma correction circuits (31,32,33), and a time division multiplex selector switch (34);
Described a plurality of gamma correction circuit (31,32,33) produces respectively M position reference gray level grade current potential, and transmit it to time division multiplex selector switch (34), described time division multiplex selector switch (34) is the output signal selection to described a plurality of gamma correction circuits (31,32,33) according to the control signal of described sequential control circuit (1), each M position voltage of exporting from described a plurality of gamma correction circuits (31,32,33) at times, select wherein one group to export, be transferred to described non-linear interpolation and buffer circuits group (4).
7. AMOLED voltage mode driving circuit as described in claim 3～6, is characterized in that,
In described non-linear interpolation and buffer circuits group (4), each non-linear interpolation and buffer circuits (4_i) comprise current potential selector switch (41), noble potential interpolating unit (42), electronegative potential interpolating unit (43), electric current summing circuit (44) and output buffer (45);
Described current potential selector switch (41) receives the M level reference gray level grade electric potential signal of described gamma correction circuit (3) and the viewdata signal of described data processing circuit (2), in M level input current potential, choose immediate 3 the gray shade scale potential value VL of the gray shade scale represented with picture signal, VM, VH, it is transferred to respectively to described noble potential interpolating unit (42) and described electronegative potential interpolating unit (43);
Described noble potential interpolating unit (42) receives higher two reference gray level grade current potential (VH 3 reference voltages of its extraction from described current potential selector switch (41), VM), from data processing circuit 2, receive 2 bit image data compared with low level signal BL, respectively by two reference gray level grade current potential (VH, VM) be converted into electric current, and according to described view data, compared with the parameter of the determined insertion position of low level signal BL, carry out ratio adjusting to transforming the electric current obtaining, ratio regulates by the inner current control module of described noble potential interpolating unit (42) and realizes, described noble potential interpolating unit (42) receives output voltage signal VOUT to form negative feedback from described output buffer (45), output current Ivi is:
Ivi/g=coefficient 1 * VH+(coefficient 2 – coefficients 3) * VM – VOUT
Described electronegative potential interpolating unit (43) receives two reference gray level grade current potential (VM lower its 3 adjacent reference voltages that extract from described current potential selector switch (41), VL), and it is identical with 42 modules compared with low level signal BL(from data processing circuit 2, to receive 2 bit image data), these two adjacent reference potentials are carried out to voltage to the rear enforcement ratio adjusting of conversion of electric current, the coefficient that ratio regulates is to change under compared with the control of low level signal BL in view data, and output current Iic is:
Iic/g=coefficient 3 * (VM – VL)
Described electric current summing circuit (44) receives output current from described noble potential interpolating unit (42) and described electronegative potential interpolating unit (43) respectively.Described output buffer (45) is from described electric current summing circuit (44) received current signal, described output buffer (45) provides current-voltage translation function, by current conversion, be output voltage VO UT, load capacity to next stage circuit is also provided, has exported VOUT to AMOLED voltage mode display screen to drive its normal operation;
Described electric current summing circuit 44 output current I44, have
I44/g=Ivi/g+Iic/g=coefficient 1*VH+ coefficient 2*VM – coefficient 3*VL – VOUT=0
Wherein, g is voltage/current conversion coefficient;
Coefficient 1, coefficient 2, coefficient 3 are determined by concrete interpolation algorithm, and coefficient 1+ coefficient 2-coefficient 3=1.
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|---|---|---|---|---|
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| CN105590583A (en) * | 2016-03-28 | 2016-05-18 | 北京宏力尼科科技有限公司 | Gray scale voltage generation circuit, generation method, driving circuit and display device |
| CN105913815A (en) * | 2016-04-15 | 2016-08-31 | 深圳市华星光电技术有限公司 | Mura phenomenon compensation method of display panel |
| CN106486071A (en) * | 2016-12-23 | 2017-03-08 | 福州大学 | A kind of electric moistening display non-linear voltage amplitude gray modulation method and its device |
| CN109543499A (en) * | 2017-09-21 | 2019-03-29 | 三星电子株式会社 | Gamma circuitry, electronic equipment and execution optical finger print know method for distinguishing |
| CN111477170A (en) * | 2020-04-02 | 2020-07-31 | 广东晟合技术有限公司 | Method for reducing gamma line in O L ED product by using multi-stage interpolation |
| CN111724729A (en) * | 2019-03-21 | 2020-09-29 | 瑞鼎科技股份有限公司 | Source driver and operating method thereof |
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| CN113630933A (en) * | 2021-09-18 | 2021-11-09 | 上海三思电子工程有限公司 | LED driver, driving circuit and driving method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020145602A1 (en) * | 1995-02-17 | 2002-10-10 | Yojiro Matsueda | Liquid crystal display apparatus, driving method therefor, and display system |
| CN1870097A (en) * | 2005-05-26 | 2006-11-29 | 株式会社日立制作所 | Image displaying apparatus |
| US20090231256A1 (en) * | 2008-03-17 | 2009-09-17 | Eui Tae Kim | Digital gamma correction system and method |
| US20090262146A1 (en) * | 2008-02-08 | 2009-10-22 | Rohm Co., Ltd. | Source driver |
| JP2012065089A (en) * | 2010-09-15 | 2012-03-29 | Mitsubishi Electric Corp | Color correction device and display device |
-
2013
- 2013-12-06 CN CN201310655290.9A patent/CN103617780B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020145602A1 (en) * | 1995-02-17 | 2002-10-10 | Yojiro Matsueda | Liquid crystal display apparatus, driving method therefor, and display system |
| CN1870097A (en) * | 2005-05-26 | 2006-11-29 | 株式会社日立制作所 | Image displaying apparatus |
| US20090262146A1 (en) * | 2008-02-08 | 2009-10-22 | Rohm Co., Ltd. | Source driver |
| US20090231256A1 (en) * | 2008-03-17 | 2009-09-17 | Eui Tae Kim | Digital gamma correction system and method |
| JP2012065089A (en) * | 2010-09-15 | 2012-03-29 | Mitsubishi Electric Corp | Color correction device and display device |
Non-Patent Citations (1)
| Title |
|---|
| ，YONG-JOON JEON，HYUNG-MIN LEE，ETL: "A Piecewise Linear 10 Bit DAC Architecture With Drain Current Modulation for Compact LCD Driver ICs", 《IEEE JOURNAL OF SOLID STATE CIRCUITS》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104252834A (en) * | 2014-05-27 | 2014-12-31 | 四川虹视显示技术有限公司 | AMOLED (Active Matrix/Organic Light Emitting Diode) low-gray characteristic compensation driving circuit |
| CN105590583A (en) * | 2016-03-28 | 2016-05-18 | 北京宏力尼科科技有限公司 | Gray scale voltage generation circuit, generation method, driving circuit and display device |
| CN105590583B (en) * | 2016-03-28 | 2018-06-01 | 二十一世纪（北京）微电子技术有限公司 | Gray scale voltage generation circuit, production method, driving circuit and display device |
| CN105913815A (en) * | 2016-04-15 | 2016-08-31 | 深圳市华星光电技术有限公司 | Mura phenomenon compensation method of display panel |
| CN105913815B (en) * | 2016-04-15 | 2018-06-05 | 深圳市华星光电技术有限公司 | Display panel Mura phenomenon compensation methodes |
| CN106486071A (en) * | 2016-12-23 | 2017-03-08 | 福州大学 | A kind of electric moistening display non-linear voltage amplitude gray modulation method and its device |
| CN106486071B (en) * | 2016-12-23 | 2018-11-27 | 福州大学 | A kind of electric moistening display non-linear voltage amplitude gray modulation method and device thereof |
| CN109543499A (en) * | 2017-09-21 | 2019-03-29 | 三星电子株式会社 | Gamma circuitry, electronic equipment and execution optical finger print know method for distinguishing |
| CN111724729B (en) * | 2019-03-21 | 2021-11-30 | 瑞鼎科技股份有限公司 | Source driver and operating method thereof |
| CN111724729A (en) * | 2019-03-21 | 2020-09-29 | 瑞鼎科技股份有限公司 | Source driver and operating method thereof |
| CN112687236A (en) * | 2019-10-17 | 2021-04-20 | 苏州超锐微电子有限公司 | Slope programmable DAC circuit for gamma correction and implementation method thereof |
| CN111477170A (en) * | 2020-04-02 | 2020-07-31 | 广东晟合技术有限公司 | Method for reducing gamma line in O L ED product by using multi-stage interpolation |
| CN111477170B (en) * | 2020-04-02 | 2021-08-10 | 广东晟合微电子有限公司 | Method for reducing gamma lines in OLED product by using multi-stage interpolation |
| CN113630933A (en) * | 2021-09-18 | 2021-11-09 | 上海三思电子工程有限公司 | LED driver, driving circuit and driving method |
| CN113630933B (en) * | 2021-09-18 | 2024-02-27 | 上海三思电子工程有限公司 | LED driver, driving circuit and driving method |
| CN114464123A (en) * | 2022-03-24 | 2022-05-10 | 武汉天马微电子有限公司 | Gamma debugging method and gamma debugging device for display panel |
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