CN103617780B - AMOLED display drive circuit and non-linear interpolation building method - Google Patents
AMOLED display drive circuit and non-linear interpolation building method Download PDFInfo
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Abstract
The present invention relates to a kind of AMOLED voltage mode display drive circuit and non-linear interpolation building method. A kind of AMOLED voltage mode display drive circuit, comprises time schedule controller, data processing circuit, gamma correction circuit and non-linear interpolation and buffer circuits. Data processing circuit receives timing control signal and serial image data, and serial data is converted to the parallel data with behavior unit, transfers to non-linear interpolation and buffer circuits group. Described gamma correction circuit produces M level grayscale voltage according to gamma correction curve, and described non-linear interpolation and buffer circuits receive grayscale voltage and view data, and produces N position grayscale voltage driving display screen. The present invention is not introducing on the basis of complicated circuit construction, by non-linear interpolation and buffer circuits, gamma circuit for rectifying M position output reference potential is carried out to non-linear interpolation, with gamma correction curve matched well, realizes higher gradation potential display precision.
Description
Technical field
The present invention relates to organic light-emitting diode display technical field, be specifically related to a kind of AMOLED voltage mode display screen and driveThe building method of moving circuit and gradation potential non-linear interpolation.
Background technology
Organic Light Emitting Diode (OrganicLightEmittingDiode, hereinafter to be referred as OLED) Display Technique is at electric fieldEffect under, organic semiconductor and luminous organic material are carried out to carrier injection and compound and cause its luminous technology. ApplicationThe display of this technology, be OLED display. OLED, as novel light-emitting technology, has self-luminous, visual angleExtensively, the reaction time is short, luminous efficiency is high, operating voltage is low, panel is thin, can make large scale with can flexing etc. characteristic. CompareIn other Display Techniques of current main flow, as LCD, light-emitting diode display etc., all there is in many aspects obvious advantage.
Viewdata signal is converted into corresponding gray scale etc. by Active Matrix OLED (AMOLED) voltage mode drive circuitLevel current potential, relation transfers to display screen to drive it normally to work chronologically. In the time using viewdata signal to drive display screen,Voltage/gray-tone response the feature showing due to OLED presents non-linearly, causes screen display distortion, therefore passes through Gamma correctionCurve compensates viewdata signal current potential. The AMOLED voltage mode display screen of current high color depth drives electricityRoad adopts primary and secondary two-stage digital-to-analogue conversion (DAC) circuit structure for example, to realize n bit (n=8) tonal gradation current potential mostlyStructure is to adopt linear secondary DAC. Its overall framework as shown in Figure 1. The M of linear secondary DAC to gamma correction circuit(M＝2n-2+ 2 ,-2 in index reflected interpolation density, and interpolation density is 2 bits) a level output reference potential entersLine linearity interpolation, forms N (N=2n) level tonal gradation current potential. The reference potential producing due to linear interpolation has departed from galAgate calibration curve, each tonal gradation current potential of drive circuit output has larger error.
Summary of the invention
The present invention is directed to the problem of prior art for AMOLED voltage mode drive circuit tonal gradation 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 drive circuit.
A kind of AMOLED display screen grey grade current potential non-linear interpolation building method provided by the invention, from Gamma correction electricityIn the M level gamma corrected voltage that road produces, extract 3 adjacent tonal gradation current potential VL, VM, VH, as reference electricityPress wherein VH > VM > VL. In tonal gradation-data voltage plane, construct one by these 3 reference point of potentialsNonlinear curve, getting the data voltage that inserts tonal gradation position on this nonlinear curve is corresponding tonal gradation current potential.
A kind of AMOLED voltage mode drive circuit provided by the invention, comprising: sequential control circuit 1, data processing electricityRoad 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 pressSequential is normally worked.
Described data processing circuit 2 receives n Bits Serial viewdata signal s1, is converted into K road n bit parallel letterNumber 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 passed throughParallel interface is exported at one time.
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, one of each passage configurationNon-linear interpolation and buffer circuits 4_i (i=1,2 ..., K). Non-linear interpolation and buffer circuits 4_i are according to the n of this passageThe tonal gradation G of bit image data signal potential representative, the M level reference gray level producing from described gamma correction circuit 3In grade current potential, select and hithermost 3 the adjacent reference gray level grade current potential VL of tonal gradation G, VH, VM, pass throughNon-linear interpolation method (for example parabola interpolation) obtains the driving voltage corresponding with this viewdata signal current potential, outputs toOLED display screen.
The linear interpolation building method that interpolation building method of the present invention is more general has higher interpolation accuracy, has higherPicture disply quality. Drive circuit of the present invention is exported gamma correction circuit M level by non-linear interpolation and buffer circuitsReference potential carries out non-linear interpolation, and matched well between gamma correction curve, realizes gradation potential display precision more accurately.
Brief description of the drawings
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 multiple gamma correction circuits and a time division multiplex selector
Fig. 8 is that the structural representation of non-linear interpolation of the present invention and buffer circuits is concrete
Detailed description of the invention
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 sequentialControl circuit 1, data processing circuit 2, gamma correction circuit 3, linear interpolation and buffer circuits group 40. Wherein adoptGamma correction circuit 3 is 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, from galIn the M level gamma corrected voltage that agate correcting circuit produces, extract 3 adjacent tonal gradation current potentials, as with reference to voltage,In tonal gradation-output voltage plane, construct one by the nonlinear curve of these 3 reference point of potentials, get this nonlinear curveThe data voltage of upper insertion tonal gradation position is corresponding tonal gradation current potential. This current potential VOUT is these 3 reference potentialsSpecial ratios and, obtain by controlling the proportionality coefficient of reference voltage. Taking polynomial interopolation method as example, it is in gray scale etc.In level-data voltage plane, construct one by the parabola of these 3 reference point of potentials, get on this parabola and insert tonal gradationThe data voltage at place is corresponding tonal gradation current potential, and this voltage can be by pressing particular factor to 3 adjacent tonal gradation current potentialsDwindle and be added and obtain.
For example, in n bit image data signal, if interpolation density is 2 bits, desirable its high bit (n-2) bitData BH, the tonal gradation corresponding Gamma correction electricity represented compared with the viewdata signal current potential of low data BL=00Press. According to this viewdata signal current potential BH00, in M level reference potential, choose corresponding reference gray level grade current potential VL,And continuous two current potential VM, the VH that are adjacent, totally 3 reference potentials, wherein VH > VM > VL. For example data electricityThe high-order BH=000000 in position selects and immediate 3 the tonal gradation current potential V0 of tonal gradation 0, V4, V8; NumberAccording to current potential, high-order BH=000001 selects and immediate 3 the tonal gradation current potential V4 of tonal gradation 4, V8, V12,The like.
View data compared with the determined position of low data BL (this position between VH and VM, and by interpolation densityDetermine),, the data voltage of getting on this parabola is corresponding tonal gradation 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, calculate and can draw by quadratic polynomial interpolation method:
VOUT(11)＝21/32×VH+7/16×VM-3/32×VL
VOUT(10)＝3/8×VH+3/4×VM-1/8×VL
VOUT(01)＝5/32×VH+15/16×VM-3/32×VL
As shown in Figure 3, this interpolation building method has higher interpolation accuracy compared with linear interpolation building method, has moreHigh picture disply quality. Simulation results DNL and INL are respectively 0.57LSB and 0.50LSB, stabilization time(0.2%) be 6.6 μ s.
Fig. 4 is a kind of AMOLED voltage mode display drive circuit of the present invention, comprises sequential control circuit 1, numberAccording to treatment 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 schoolPositive circuit 3, to ensure that it correctly exports data chronologically.
Described data processing circuit 2 receives n Bits Serial viewdata signal s1, is converted into K road n parallel-by-bit imageData-signal s2, transfers to non-linear interpolation and buffer electricity according to timing control signal by described parallel image data-signal s2Road group 4. Described data processing circuit 2 receives the timing control signal of sequential control circuit 1, by going here and there and changing, makes stringThe All Datarows that belongs to same frame in the view data of line mode transmission 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 latchDevice 203 and level displacement shifter 204.
The present invention can be used for rgb interface pattern. RGB data processing circuit 23 receives the sequential control of sequential control circuit 1Signal processed and serial RGB viewdata signal, and the rgb image data signal of serial input is converted to parallel dataSignal, 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 electricityResistance 311, gamma amplitude correction selector 312 and second level ladder resistance 313. First order ladder resistance 311 is according to ginsengExamine voltage and the resistance value ladder resistance through overcorrect, produce 4 candidates' the highest tonal gradation current potential VOR and 4 timesSelect minimum tonal gradation current potential V260R. Candidate's current potential of the highest tonal gradation current potential and minimum tonal gradation current potential is by a point supplementary biographyTransport to two gamma amplitude correction selectors 312, selector 312 according to amplitude correction signal R0 and R1 respectively from 4In candidate's current potential, choose one and be sent to second level ladder resistance 313 as its reference gray level grade current potential. Described second level ladderResistance 313 receives respectively high-order tonal gradation reference voltage and low level tonal gradation from two gamma amplitude correction selectors 312Reference voltage, and the dividing potential drop between two reference voltages produces V4R, V8R to V256R by nonlinear ladder resistance64 tonal gradation current potentials (taking n=8, interpolation density as 2 bits are as example). Together with VOR and V260R, totally 66Individual reference potential is exported together.
Fig. 7 is gamma correction circuit group 30 schematic diagrames that comprise multiple gamma correction circuits and a time division multiplex selector. ItsDescribed in gamma correction circuit 3 can be multiple,, now also there is a time-division in for example gamma correction circuit 31,32,33Multiplexing selector 34. Multiple correcting circuits produce respectively M position reference gray level grade current potential, and transmit it to time division multiplex choosingSelect device 34. Time division multiplex selector 34 according to the control signal of sequential control circuit to multiple gamma correction circuit 31,32,33 output signal selection, selects wherein one group carry out defeated from multiple correcting circuit each M position voltage of exporting at timesGo out, be transferred to non-linear interpolation and buffer circuits group 4.
Taking rgb interface pattern as example, described gamma correction circuit group 30 respectively provides a gamma school to R, G, B signalPositive circuit 31,32,33. Each correction amplitude difference, i.e. R, G, corresponding three the different calibration curves of B. Circuit knotAlthough structure is the same, wherein the resistance of resistance is different. For example in 31, amplitude correction signal is R0 and R1, in 32For G0 and G1, be B0 and B1 in 33. Time division multiplex selector 34 in R, G, a B3 signal, select withCorresponding that of sequential exported, for example, in one-period, first export R data, then export G data, finally defeatedGo out B data. Fig. 8 is a kind of AMOLED voltage mode display drive circuit of the present invention, for rgb interface mouldFormula, comprises sequential control circuit 1, RGB data processing circuit 23, gamma correction circuit group 30 and non-linear interpolation and slowRush device circuit group 4.
In the various embodiments described above, each non-linear interpolation and buffer circuits in described non-linear interpolation and buffer circuits group 44_i (i=1,2 ..., K, K is display screen source electrode quantity) all as shown in Figure 9, comprise current potential selector 41, high potential interpolationUnit 42, electronegative potential interpolating unit 43, electric current summing circuit 44 and output buffer 45. The function of each several part is: electricityDigit selector 41 is selected 3 reference voltage VH, VM, VL in M step voltage; High 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,VL two voltages are proofreaied and correct output voltage, on the determined ratio of module 42 basis, output voltage VO UT are enteredRow adjustment by a small margin, finally to realize non-linear interpolation. Electric current summing circuit 44 modules are current summation, to realize 42,The combination of 43 these two module acquired results; The electric current obtaining after being added is converted to voltage by output buffer 45 again, exports toNext stage circuit.
Current potential selector 41 receives M level reference gray level grade electric potential signal and the data processing circuit 2 of gamma correction circuit 3Viewdata signal, in M level input current potential, choose immediate 3 gray scales of the tonal gradation represented with picture signalGrade potential value VL, VM, VH, transfer to respectively high potential interpolating unit 42 and electronegative potential interpolating unit 43 by it.
Because the feature of interpolation coefficient, is shown in formula 1, it is larger that insertion voltage is affected by VH, VM, high potential interpolating unit 42Complete the conversion of this high potential, and set up the relation between VH, VM, these 3 current potentials of VOUT; Be subject to VL and insert voltageAffect littlely, electronegative potential interpolating unit 43 completes the conversion of electronegative potential, and it is input as two of VL and VM, by inserting oneIndividual little electric current is introduced the impact of electronegative potential, carries out the adjustment of output voltage.
Higher two references from 3 reference voltages of current potential selector 41 its extractions of reception of described high potential interpolating unit 42Tonal gradation current potential (VH, VM), receives 2 bit image data compared with low level signal BL from data processing circuit 2, respectivelyTwo reference gray level grade current potentials (VH, VM) are converted into electric current, and the electric current that conversion is obtained is not according to insertion positionWith carrying out ratio adjusting in the parameter of non-linear insertion. Insertion position is definite compared with low level signal BL by view data. Ratio is adjustedJoint is realized by the current control module of described high potential interpolating unit 42 inside. Be after electric current with reference to voltage transitions, straightConnect excess current control module and zoom in or out in proportion, the coefficient zooming in or out in view data compared with low level signal BLUnder controlling, change. Receive output voltage signal VOUT to form negative-feedback from output buffer 45. Output current IviAs shown in Equation 2.
Ivi/g=coefficient 1 × VH+ (coefficient 2-coefficient 3) × VM-VOUT (formula 2)
Described electronegative potential interpolating unit 43 receives its 3 adjacent reference voltages that extract lower from current potential selector 41Two reference gray level grade current potentials (VM, VL), and receive 2 bit image data compared with low level BL from data processing circuit 2Signal (identical with 42 modules), carries out voltage to the rear enforcement ratio of conversion of electric current to these two adjacent reference potentials and regulates,The coefficient that ratio regulates is to change under compared with the control of low level signal BL in view data. By the output current Iic transmission obtainingTo 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 high 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 conversionFunction, is output voltage VO UT by current conversion, and the load capacity to next stage circuit is also provided. VOUT is exportedTo AMOLED voltage mode display screen to drive it normally to work. Described electric current summing circuit 44 output current I44, asShown in formula 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, pass through high potential interpolating unit and electronegative potential interpolationThe cooperation of unit, completes special ratios relations different according to insertion position between output voltage and 3 reference voltages. This ratioRelation can be followed and be changed according to the difference of non-linear interpolation method to obtain best interpolation effect, has realized the secondary of non-linear interpolationDAC。
Claims (4)
1. an AMOLED display screen grey grade current potential non-linear interpolation building method, produces from gamma correction circuitM level gamma corrected voltage in extract three adjacent tonal gradation current potential VL, VM, VH, as with reference to voltage,Wherein VH > VM > VL constructs one by these 3 reference point of potentials in tonal gradation-data voltage planeNonlinear curve, getting the data voltage that inserts tonal gradation position on this nonlinear curve is corresponding tonal gradation electricityPosition; Described in claim, AMOLED display screen grey grade current potential non-linear interpolation building method, is characterized in that,
The described M level gamma corrected voltage producing from gamma correction circuit, extract 3 adjacent tonal gradation current potentialsStep be in n bit image data signal, to get its high bit (n-2) Bit data BH, compared with lower-order digitAccording to the corresponding gamma corrected voltage of the represented tonal gradation of the viewdata signal current potential of BL=00, as a referenceTonal gradation current potential VL, and continuous two current potential VM, the VH that are adjacent, totally 3 reference potentials;
Describedly in tonal gradation-data voltage plane, construct one by the nonlinear curve of these 3 reference point of potentialsMethod be in tonal gradation-data voltage plane, to construct one by the parabola of these 3 reference point of potentials;
The described data voltage that inserts tonal gradation position on this nonlinear curve of getting is corresponding tonal gradation current potentialMethod is, between VH and VM, compared with the determined tonal gradation of low data BL position, to get this in view dataData voltage on parabola is corresponding tonal gradation current potential.
2. an AMOLED voltage mode drive 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 keepThere is circuit unit normally to work chronologically; Described data processing circuit (2) receives n Bits Serial viewdata signal(s1), be converted into K road n bit parallel viewdata signal (s2), and according to timing control signal by instituteState parallel image data-signal (s2) and transfer to non-linear interpolation and buffer circuits group (4); Described data processingCircuit (2) is by going here and there and changing, and the All Datarows that makes to belong in the view data of serial transmission same frame is by alsoLine interface is exported at one time; Described gamma correction circuit (3) produces M level reference gray level grade current potential, passesBe passed to non-linear interpolation and buffer circuits group (4); Described non-linear interpolation and buffer circuits group (4), rootShield according to the show the quantity K of source channel, non-linear interpolation of each passage configuration and buffer circuits (4_i);Described non-linear interpolation and buffer circuits (4_i) are according to the n bit image data signal potential representative of this passageTonal gradation G, from described gamma correction circuit (3) produce M level reference gray level grade current potential select and instituteState hithermost 3 the adjacent reference gray level grade current potential VL of tonal gradation G, VH, VM, by non-linear interpolation sideMethod obtains the driving voltage corresponding with this viewdata signal current potential, outputs to OLED display screen.
3. AMOLED voltage mode drive circuit as claimed in claim 2, is characterized in that,
Described data processing circuit (2) is RGB data processing circuit (23);
Described gamma correction circuit group (30) comprises multiple gamma correction circuits (31,32,33), and one timeDivide multiplexing selector (34);
Described multiple gamma correction circuit (31,32,33) produces respectively M position reference gray level grade current potential, and willIt transfers to time division multiplex selector (34), and described time division multiplex selector (34) is according to described SECO electricityThe output signal selection of the control signal on road (1) to described multiple gamma correction circuits (31,32,33), timesharingEach M position voltage of exporting from described multiple gamma correction circuits (31,32,33) of section, select wherein one group to enterLine output, is transferred to described non-linear interpolation and buffer circuits group (4).
4. AMOLED voltage mode drive circuit as described in claim 2 or 3, is characterized in that,
Each non-linear interpolation and buffer circuits (4_i) in described non-linear interpolation and buffer circuits group (4)All comprise current potential selector (41), high potential interpolating unit (42), electronegative potential interpolating unit (43), electric currentSumming circuit (44) and output buffer (45);
Described current potential selector (41) receives the M level reference gray level grade current potential letter of described gamma correction circuit (3)Number and the viewdata signal of described data processing circuit (2), in M level input current potential, choose and picture signal instituteImmediate 3 the tonal gradation potential value VL of tonal gradation, VM, the VH that represent, described in it is transferred to respectivelyHigh potential interpolating unit (42) and described electronegative potential interpolating unit (43);
Described high potential interpolating unit (42) receives 3 reference voltages of its extraction from described current potential selector (41)In higher two reference gray level grade current potentials (VH, VM), receive 2 bit image data from data processing circuit 2Low level signal BL, is converted into electric current by two reference gray level grade current potentials (VH, VM) respectively, and obtains transformingElectric current carry out ratio adjusting according to described view data compared with the parameter of the determined insertion position of low level signal BL, thanExample regulates by the inner current control module of described high potential interpolating unit (42) and realizes, described high potential interpolationUnit (42) receives output voltage signal VOUT to form negative-feedback, output from described output buffer (45)Electric current IviFor:
Ivi/ g=coefficient 1 × VH+ (coefficient 2 – coefficients 3) × VM – VOUT
Described electronegative potential interpolating unit (43) receives from described current potential selector (41) 3 adjacent ginsengs that it extractsExamine two reference gray level grade current potentials (VM, VL) lower in voltage, and receive 2 bits from data processing circuit 2View data, compared with low level signal BL (identical with 42 modules), is carried out voltage to electricity to these two adjacent reference potentialsThe rear enforcement ratio of conversion of stream regulates, and the coefficient that ratio regulates is to become under compared with the control of low level signal BL in view dataChange output current IicFor:
Iic/ g=coefficient 3 × (VM – VL)
Described electric current summing circuit (44) is respectively from described high potential interpolating unit (42) and described electronegative potential interpolationUnit (43) receives output current; Described output buffer (45) receives from described electric current summing circuit (44)Current signal, described output buffer (45) provides current-voltage translation function, is output voltage by current conversionVOUT, also provides the load capacity to next stage circuit, exports VOUT to AMOLED voltage modeDisplay screen is to drive it normally to work;
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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| CN104252834B (en) * | 2014-05-27 | 2017-03-29 | 四川虹视显示技术有限公司 | The low gamma characteristic compensation drive circuits of AMOLED |
| 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 |
| 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 |
| 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 |
| KR20190033235A (en) * | 2017-09-21 | 2019-03-29 | 삼성전자주식회사 | Gamma circuit supporting optical fingerprint recognition, electronic device including the same and method of performing optical fingerprint recognition |
| TWI744614B (en) * | 2019-03-21 | 2021-11-01 | 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 |
| 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 |
| 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 |
| CN114464123B (en) * | 2022-03-24 | 2023-08-18 | 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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| KR101286536B1 (en) * | 2008-03-17 | 2013-07-17 | 엘지디스플레이 주식회사 | Digital gamma correction system and correction method |
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