CN103021316A - Driving system and method applicable to red, green, blue and white (RGBW) sub-pixel display screen - Google Patents
Driving system and method applicable to red, green, blue and white (RGBW) sub-pixel display screen Download PDFInfo
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Abstract
The invention discloses a driving system and method applicable to a red, green, blue and white (RGBW) sub-pixel display screen. The driving system comprises a RGB source driving chip and an analog signal conversion unit. The RGB source driving chip is used for converting received each N group of RGB digital driving signals coming from a time schedule controller to N groups of analog driving signals comprising RGB sub-pixel driving voltage and outputting the analog driving signals to the analog signal conversion unit. The analog signal conversion unit is used for converting each N group of the analog driving signals comprising RGB sub-pixel driving voltage to N groups of the analog driving signals comprising RGBW sub-pixel driving voltage and outputting the analog driving signals comprising RGBW sub-pixel driving voltage to an effective display area of the RGBW sub-pixel display screen, wherein N is a positive integer. According to the driving system and method, the effect of using the RGB source driving chip to drive the RGBW display screen can be achieved, system complexity is simplified, and system driving cost is saved.
Description
Technical field
The present invention relates to display screen Driving technique field, relate in particular to a kind of RGBW(of being applicable to red, green, blue, white) drive system and the method for four sub-pixels display screens.
Background technology
With TFT-LCD(Thin Film Transistor-Liquid Crystal Display, thin film transistor (TFT)-LCDs) compares, AMOLED(Active-Matrix Organic Light Emitting Diode, active matrix organic light-emitting diode) display screen has more advantage, such as: need not backlight, fast response time, contrast is high, the visual angle is wide, energy consumption is low and can realizes soft demonstration etc., have significant progress in the flat pannel display field in future.But, because the problems such as AMOLED exists lack of homogeneity, threshold value drift in manufacture process, luminescence efficiency is low and serviceable life is short, therefore, industry is often used the mode of interior pixels Compensation Design (increasing TFT number and electric capacity number in sub-pixel) at present, compensate the threshold deviation of AMOLED, improve the show uniformity of AMOLED.Yet, when the mode that adopts the interior pixels Compensation Design compensates the threshold deviation of AMOLED, can greatly reduce AMOLED pixel aperture ratio, cause the AMOLED brightness of display screen to reduce, for this kind situation, industry has further proposed the Pixel Design mode of RGBW four sub-pixels, increase a white sub-pixels by the pixel basis in original RGB three sub-pixels, solve the problem that the AMOLED brightness of display screen descends, improve the comprehensive brightness of AMOLED display screen.
In addition, utilizing WOLED(White Organic Light Emitting Diode, white organic LED) also can adopt the Pixel Design mode of above-mentioned RGBW during the large-sized AMOLED display screen of technological development, particularly, reserve the W light-emitting zone by the original rgb pixel basis at WOLED, and the color film of this W light-emitting zone position removed, can obtain the pixel of RGBW mode.
Further, because the present TCON(time schedule controller that drives signal that provides for the Source Driver chip (source drive chip) of each display screen) received raw data is generally the RGB digital drive signals, and the needed driving signal of RGBW display screen (such as the AMOLED display screen) is for comprising R, G, B, the analog drive signal of W four sub-pixels driving voltages, therefore, for RGBW four sub-pixels display screens, how should original RGB digital drive signals be converted to and comprise R, G, B, the analog drive signal of W four sub-pixels driving voltages, and then realize the problem that solves for primary that is driven into of RGBW display screen.At present, industry generally adopts the mode of digital signal conversion to realize that the RGB data are to the conversion of RGBW data, that is to say, after the RGB digital drive signals enters into TCON, by this TCON the RGB digital drive signals that receives is carried out a series of data processing operation and obtain the RGBW digital drive signals, and the RGBW digital drive signals that obtains passed to Source Driver chip, afterwards, by this Source Driver chip the RGBW digital drive signals that receives is carried out digital-to-analog conversion, obtain comprising R, G, B, the analog drive signal of W four sub-pixels driving voltages also outputs in the AMOLED display screen, realization is to the driving of this AMOLED display screen, and concrete data conversion process can be as shown in Figure 1.
But when adopting aforesaid way that this original RGB digital drive signals is converted to the analog drive signal that comprises R, G, B, W four sub-pixels driving voltages and then the driving that realizes the RGBW display screen, there are the following problems:
1) described Source Driver chip is required to be the chip that can support RGBW type pixel driver, existing RGB source drive chip can't use, reason is that existing RGB source drive chip has independently Gamma circuit (gray level circuit) correspondence of RGB, its output terminal is per 3 passage one-periods, and RGBW display screen per 4 passage one-periods really, the two can not correspondingly connect;
2) in existing data transfer method, TCON need to carry out complicated data to be processed, and has increased burden and the design complexities of TCON;
3) in existing data transfer method, the volume of transmitted data between TCON and the Source Driver chip is larger, has improved signal transmission frequencies, has increased realization difficulty and the EMI(electromagnetic interference (EMI) of system) risk;
4) in existing data transfer method, the output channel quantity of Source Driver chip is 4/3 times under the RGB mode, because the increase of output channel quantity can cause the increase of Source Driver number of chips, therefore, the driving cost of the further increase of meeting system and the complexity of system.
That is to say, when the mode that adopts existing digital signal conversion is converted to the analog drive signal that comprises R, G, B, W four sub-pixels driving voltages and then the driving that realizes the RGBW display screen with this original RGB digital drive signals, can not utilize existing RGB source drive chip to drive the RGBW display screen, can have also simultaneously that volume of transmitted data is large, system complexity is higher and drive the higher problem of cost.
Summary of the invention
The embodiment of the invention provides a kind of drive system and method for the RGBW of being applicable to four sub-pixels display screens, in order to solve exist in the prior art utilize the RGBW source drive chip to drive the RGBW display screen time volume of transmitted data that causes large, system complexity is higher and drive the higher problem of cost.
A kind of drive system that is applicable to RGBW four sub-pixels display screens comprises:
The RGB source drive chip, the every N group RGB digital drive signals from TCON that is used for receiving is carried out digital-to-analog conversion, obtain the analog drive signal that the N group comprises R, G, B three sub-pixels driving voltages, and described N group is comprised that the analog drive signal of R, G, B three sub-pixels driving voltages outputs to the analog signal conversion unit;
The analog signal conversion unit, the every N group from the RGB source drive chip that is used for receiving comprises that the analog drive signal of R, G, B three sub-pixels driving voltages is converted to the analog drive signal that the N group comprises R, G, B, W four sub-pixels driving voltages, and the group of the N after will changing comprises that the analog drive signal of R, G, B, W four sub-pixels driving voltages outputs to the effective display area of RGBW four sub-pixels display screens, wherein, described N is positive integer.
A kind of driving method of the RGBW four sub-pixels display screens based on above-mentioned drive system, described method comprises:
The N that the analog signal conversion unit receives the output of RGB source drive chip organizes the analog drive signal that comprises R, G, B three sub-pixels driving voltages, and wherein, described N is positive integer;
Every group of analog drive signal that comprises R, G, B three sub-pixels driving voltages that the analog signal conversion unit will receive is converted to respectively the analog drive signal that comprises R, G, B, W four sub-pixels driving voltages, and every group of analog drive signal that comprises R, G, B, W four sub-pixels driving voltages after will changing outputs to the effective display area of RGBW four sub-pixels display screens.
Beneficial effect of the present invention is as follows:
The embodiment of the invention provides a kind of drive system and method for the RGBW of being applicable to four sub-pixels display screens, described drive system comprises RGB source drive chip and analog signal conversion unit, wherein, the every N group RGB digital drive signals from TCON that described RGB source drive chip is used for receiving is carried out digital-to-analog conversion, obtain the analog drive signal that the N group comprises R, G, B three sub-pixels driving voltages, and described N group is comprised that the analog drive signal of R, G, B three sub-pixels driving voltages outputs to the analog signal conversion unit; The every N group from the RGB source drive chip that described analog signal conversion unit is used for receiving comprises that the analog drive signal of R, G, B three sub-pixels driving voltages is converted to the analog drive signal that the N group comprises R, G, B, W four sub-pixels driving voltages, and the group of the N after will changing comprises that the analog drive signal of R, G, B, W four sub-pixels driving voltages outputs to the effective display area of RGBW four sub-pixels display screens, wherein, described N is positive integer.By technical scheme of the present invention, can realize utilizing the RGB source drive chip to drive the effect of RGBW display screen, solved exist in the prior art utilize the RGBW source drive chip to drive the RGBW display screen time volume of transmitted data that causes large, system complexity is higher and drive the higher problem of cost, greatly simplified the complexity of system and saved the driving cost of system.
Description of drawings
The mode that Figure 1 shows that the conversion of available technology adopting digital signal is converted to the analog drive signal that comprises R, G, B, W four sub-pixels driving voltages and then the structural representation of realizing the driving of RGBW display screen with original RGB digital drive signals;
Figure 2 shows that the structural representation of the drive system that is applicable to RGBW four sub-pixels display screens described in the embodiment of the invention one;
Figure 3 shows that the electrical block diagram of analog signal conversion subelement described in the embodiment of the invention one;
Figure 4 shows that the schematic flow sheet of the driving method that is applicable to RGBW four sub-pixels display screens described in the embodiment of the invention two.
Embodiment
Embodiments of the present invention is further illustrated below in conjunction with Figure of description, but the present invention is not limited to the following examples.
Embodiment one:
As shown in Figure 2, it is for being applicable to the structural representation of the drive system of RGBW four sub-pixels display screens described in the embodiment of the invention one, described drive system comprises RGB source drive chip 11 and analog signal conversion unit 12, can also comprise for the RGB digital drive signals that receives from external system, and the RGB digital drive signals that receives outputed to the TCON13 of RGB source drive chip 11 and RGBW four sub-pixels display screens 14 etc., wherein:
Described RGB source drive chip 11 is used for receiving the RGB digital drive signals from TCON13, and the every N group RGB digital drive signals from TCON13 that will receive is carried out digital-to-analog conversion, obtain the analog drive signal that the N group comprises R, G, B three sub-pixels driving voltages, and, described N group is comprised that the analog drive signal of R, G, B three sub-pixels driving voltages outputs to analog signal conversion unit 12, wherein, described N is positive integer; The number of the pixel column that comprises in the numerical value of described N and the RGBW four sub-pixels display screens 14 particularly, is identical.
Particularly, described RGB source drive chip 11 is after the RGB digital drive signals that receives from TCON13, can carry out the data buffering storage at chip internal, after whenever obtaining N group RGB digital drive signals, this N group RGB digital drive signals is carried out digital-to-analog conversion, N group after obtaining changing comprises the analog drive signal of R, G, B three sub-pixels driving voltages, and the group of the N after the described conversion is comprised that the analog drive signal of R, G, B three sub-pixels driving voltages outputs to analog signal conversion unit 12.
The every N group from RGB source drive chip 11 that described analog signal conversion unit 12 is used for receiving comprises that the analog drive signal of R, G, B three sub-pixels driving voltages is converted to the analog drive signal that the N group comprises R, G, B, W four sub-pixels driving voltages, and the group of the N after will changing comprises that the analog drive signal of R, G, B, W four sub-pixels driving voltages outputs to the effective display area of RGBW four sub-pixels display screens 14, wherein, described N is positive integer.
Particularly, because in embodiments of the present invention, the final received analog drive signal of the effective display area of RGBW four sub-pixels display screens 14 comprises the analog drive signal of R, G, B, W four sub-pixels driving voltages for the N group consistent with himself desired signal, therefore, can realize the driving of RGBW four sub-pixels display screens 14.
Need to prove, in various embodiments of the present invention, described RGBW four sub-pixels display screen 14(can be referred to as the RGBW display screen) can be AMOLED display screen etc., the embodiment of the invention is not done any restriction to this; In addition, described RGB source drive chip 11 and TCON13 etc. are conventional chip; Need to prove again, described analog signal conversion unit 12 can be autonomous device between the effective display area that is arranged in RGB source drive chip 11 and RGBW four sub-pixels display screens 14 and that be positioned at described RGBW four sub-pixels display screens 14, also can be between the effective display area that is arranged in RGB source drive chip 11 and RGBW four sub-pixels display screens 14 and be positioned at the integrated equipment of described RGBW four sub-pixels display screens 14, the embodiment of the invention is not done any restriction yet to this.
Particularly, in various embodiments of the present invention, described analog signal conversion unit 12 comprises one to one analog signal conversion subelement 121 of analog drive signal that N respectively comprises R, G, B three sub-pixels driving voltages with described N group:
For arbitrary analog signal conversion subelement 121, R, G, the B three sub-pixels driving voltages of this analog signal conversion subelement 121 analog drive signal of comprising R, G, B three sub-pixels driving voltages corresponding with this analog signal conversion subelement 121 that be used for receiving carry out the analog addition computing, obtain W sub-pixel driving voltage, and described R, G, B three sub-pixels driving voltages and W sub-pixel driving voltage made up, obtain comprising the analog drive signal of R, G, B, W four sub-pixels driving voltages.
Further, as shown in Figure 3, described analog signal conversion subelement 121 can comprise operational amplifier OA1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6 for the analog addition circuit of three inputs, wherein:
One end of described the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3 is respectively R, G, the B sub-pixel drive voltage signal input end (Vrin as shown in Figure 3, Vgin, Vbin) of described analog signal conversion subelement 121, and the other end also links to each other with the positive input of described operational amplifier OA1 by the 4th resistance R 4 ground connection and this other end;
One end of described the 5th resistance R 5 links to each other other end ground connection with the reverse input end of described operational amplifier OA1;
One end of described the 6th resistance R 6 links to each other with the reverse input end of described operational amplifier OA1, the other end links to each other with the output terminal of described operational amplifier OA1, wherein, the output terminal of described operational amplifier OA1 is the W sub-pixel drive voltage signal output terminal (Vwout as shown in Figure 3) of described analog signal conversion subelement 121; And,
Described analog signal conversion subelement 121 also comprises respectively one by one corresponding R, G, the B sub-pixel drive voltage signal output terminal (Vrout as shown in Figure 3, Vgout, Vbout) that links to each other of R, G by wire and described analog signal conversion subelement 121, B sub-pixel drive voltage signal input end.
Further, the power supply of described operational amplifier OA1 is identical with the analog power of described RGB source drive chip 11, is VDDA shown in Figure 3 and VSSA.
Further, described analog signal conversion subelement 121 and is arranged in described RGBW four sub-pixels display screens 14 between the effective display area of RGB source drive chip 11 and RGBW four sub-pixels display screens 14.
Further, described the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6 can be by the ITO(tin indium oxides in the described RGBW four sub-pixels display screens 14) form, described operational amplifier OA1 can be by the TFT(thin film transistor (TFT)) form, the embodiment of the invention is not done any restriction to this.
Further, in various embodiments of the present invention, for so that resulting W sub-pixel driving voltage is R, G, B sub-pixel driving voltage three's the mean value of input, the resistance value of described the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6 needs identical, the resistance value of described the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3 needs identical, and the resistance value of described the first resistance R 1 is required to be three times of resistance value of described the 4th resistance R 4, at this moment, Vwout=(Vrin+Vgin+Vbin)/3.
Further, because as the R of W sub-pixel driving voltage for input, G, during B sub-pixel driving voltage three's mean value, although can basically reach the actual driving requirement of RGBW display screen, but can not compensate the skew of white balance, can not regulate the brightness of W sub-pixel, can only be applicable to the application of low-end product, therefore, in order further to improve the driving effect of drive system described in the embodiment of the invention, in various embodiments of the present invention, the 4th resistance R 4 can kept, on the identical basis of the resistance value of the 5th resistance R 5 and the 6th resistance R 6, adjust respectively the first resistance R 1, the resistance value of the second resistance R 2 and the 3rd resistance R 3, so that the first resistance R 1, the resistance value of the second resistance R 2 and the 3rd resistance R 3 different and all with the 4th resistance R 4(or the 5th resistance R 5, or the 6th resistance R 6) proportional between, thereby so that the W sub-pixel driving voltage that finally obtains satisfies following formula:
Vwout=(a*Vrin+b*Vgin+c*Vbin)/3, wherein, described a, b, c are scale-up factor.
In such cases, owing to adjusting the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3 and the 4th resistance R 4(or the 5th resistance R 5 or the 6th resistance R 6 simultaneously) between resistance concern, can obtain the different RGB sub-pixel of proportion, therefore can reach the effect of the brightness of regulating white balance and W sub-pixel.
The embodiment of the invention one provides a kind of drive system of the RGBW of being applicable to four sub-pixels display screens, described drive system comprises: RGB source drive chip and analog signal conversion unit, wherein, the every N group RGB digital drive signals from TCON that described RGB source drive chip is used for receiving is carried out digital-to-analog conversion, obtain the analog drive signal that the N group comprises R, G, B three sub-pixels driving voltages, and described N group is comprised that the analog drive signal of R, G, B three sub-pixels driving voltages outputs to the analog signal conversion unit; The every N group from the RGB source drive chip that described analog signal conversion unit is used for receiving comprises that the analog drive signal of R, G, B three sub-pixels driving voltages is converted to the analog drive signal that the N group comprises R, G, B, W four sub-pixels driving voltages, and the group of the N after will changing comprises that the analog drive signal of R, G, B, W four sub-pixels driving voltages outputs to the effective display area of RGBW four sub-pixels display screens, wherein, described N is positive integer.By the embodiment of the invention one described technical scheme, can realize utilizing the RGB source drive chip to drive the effect of RGBW display screen, solved exist in the prior art utilize the RGBW source drive chip to drive the RGBW display screen time volume of transmitted data that causes large, system complexity is higher and drive the higher problem of cost, greatly simplified the complexity of system and saved the driving cost of system.
Embodiment two:
As shown in Figure 4, it is for being applicable to the schematic flow sheet of the driving method of RGBW four sub-pixels display screens described in the embodiment of the invention two, described RGBW four sub-pixels display screens (be called for short RGBW display screen) can be for the AMOLED display screen etc., the embodiment of the invention is not done any restriction to this, particularly, described driving method can may further comprise the steps:
Step 101: the N that the analog signal conversion unit receives the output of RGB source drive chip organizes the analog drive signal that comprises R, G, B three sub-pixels driving voltages, and wherein, described N is positive integer.
Particularly, the N group exported of RGB source drive chip comprises that the analog drive signal of R, G, B three sub-pixels driving voltages is to be undertaken obtaining after the digital-to-analog conversion by the RGB digital drive signals from TCON that this RGB source drive chip will receive.
Particularly, the RGB source drive chip is after the RGB digital drive signals that receives from TCON, carry out the data buffering storage at chip internal, and after whenever obtaining N group RGB digital drive signals, this N group RGB digital drive signals is carried out digital-to-analog conversion, N group after obtaining changing comprises the analog drive signal of R, G, B three sub-pixels driving voltages, and the group of the N after the described conversion is comprised that the analog drive signal of R, G, B three sub-pixels driving voltages outputs in the analog signal conversion unit.
Need to prove, in various embodiments of the present invention, described TCON and RGB source drive chip are conventional chip; Need to prove in addition, the number of the pixel column that comprises in the numerical value of described N and the RGBW display screen is identical.
Need to prove again, described analog signal conversion unit can be autonomous device between the effective display area that is arranged in RGB source drive chip and RGBW display screen and that be positioned at described RGBW display screen, also can be between the effective display area that is arranged in RGB source drive chip and RGBW display screen and be positioned at the integrated equipment of described RGBW display screen, the embodiment of the invention is not done any restriction to this.
Step 102: every group of analog drive signal that comprises R, G, B three sub-pixels driving voltages that the analog signal conversion unit will receive is converted to respectively the analog drive signal that comprises R, G, B, W four sub-pixels driving voltages.
Particularly, described analog signal conversion unit comprises one to one analog signal conversion subelement of N analog drive signal that comprises R, G, B three sub-pixels driving voltages with described N group respectively.
Further, the every group of analog drive signal that comprises R, G, B three sub-pixels driving voltages that receives is converted to respectively the analog drive signal that comprises R, G, B, W four sub-pixels driving voltages, specifically can comprises:
Comprise R for arbitrary group, G, the analog drive signal of B three sub-pixels driving voltages, by organizing the corresponding analog signal conversion subelement of analog drive signal to the R in this group analog drive signal with this, G, B three sub-pixels driving voltages carry out the analog addition computing, obtain W sub-pixel driving voltage, and, by organizing the corresponding analog signal conversion subelement of analog drive signal with described R with this, G, B three sub-pixels driving voltages and W sub-pixel driving voltage make up, and obtain comprising R, G, B, the analog drive signal of W four sub-pixels driving voltages.
Particularly, as shown in Figure 3 (Fig. 3 is the electrical block diagram of described analog signal conversion subelement), described analog signal conversion subelement can be the analog addition circuit of three inputs, it specifically can comprise operational amplifier OA1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6, wherein:
One end of described the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3 is respectively R, G, the B sub-pixel drive voltage signal input end (Vrin as shown in Figure 3, Vgin, Vbin) of described analog signal conversion subelement 121, and the other end also links to each other with the positive input of described operational amplifier OA1 by the 4th resistance R 4 ground connection and this other end;
One end of described the 5th resistance R 5 links to each other other end ground connection with the reverse input end of described operational amplifier OA1;
One end of described the 6th resistance R 6 links to each other with the reverse input end of described operational amplifier OA1, the other end links to each other with the output terminal of described operational amplifier OA1, wherein, the output terminal of described operational amplifier OA1 is the W sub-pixel drive voltage signal output terminal (Vwout as shown in Figure 3) of described analog signal conversion subelement; And,
Described analog signal conversion subelement also comprises respectively one by one corresponding R, G, the B sub-pixel drive voltage signal output terminal (Vrout as shown in Figure 3, Vgout, Vbout) that links to each other of R, G by wire and described analog signal conversion subelement, B sub-pixel drive voltage signal input end.
Further, the power supply of described operational amplifier OA1 is identical with the analog power of described RGB source drive chip, is VDDA and VSSA.
Further, described analog signal conversion subelement and is arranged in described RGBW display screen between the effective display area of RGB source drive chip and RGBW display screen.
Further, described the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6 can be formed by the ITO in the described RGBW display screen, and described operational amplifier OA1 can be formed by TFT.
Further, in various embodiments of the present invention, for so that resulting W sub-pixel driving voltage is R, G, B sub-pixel driving voltage three's the mean value of input, the resistance value of described the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6 needs identical, the resistance value of described the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3 needs identical, and the resistance value of described the first resistance R 1 is required to be three times of resistance value of described the 4th resistance R 4, at this moment, Vwout=(Vrin+Vgin+Vbin)/3.
Further, because as the R of W sub-pixel driving voltage for input, G, during B sub-pixel driving voltage three's mean value, although can basically reach the actual driving requirement of RGBW display screen, but can not compensate the skew of white balance, can not regulate the brightness of W sub-pixel, can only be applicable to the application of low-end product, therefore, in order further to improve the driving effect of drive system in the embodiment of the invention, in various embodiments of the present invention, the 4th resistance R 4 can kept, on the identical basis of the resistance value of the 5th resistance R 5 and the 6th resistance R 6, adjust respectively the first resistance R 1, the resistance value of the second resistance R 2 and the 3rd resistance R 3, so that the first resistance R 1, the resistance value of the second resistance R 2 and the 3rd resistance R 3 different and all with the 4th resistance R 4(or the 5th resistance R 5, or the 6th resistance R 6) proportional, thereby so that the W sub-pixel driving voltage that finally obtains satisfies following formula:
Vwout=(a*Vrin+b*Vgin+c*Vbin)/3, wherein, described a, b, c are scale-up factor.
In such cases, owing to adjusting the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3 and the 4th resistance R 4(or the 5th resistance R 5 or the 6th resistance R 6 simultaneously) between resistance concern, can obtain the different RGB sub-pixel of proportion, therefore can reach the effect of the brightness of regulating white balance and W sub-pixel.
Step 103: every group of analog drive signal that comprises R, G, B, W four sub-pixels driving voltages after will changing outputs to the effective display area of RGBW four sub-pixels display screens.
Particularly, in this step 103, because the received analog drive signal of the effective display area of RGBW four sub-pixels display screens comprises the analog drive signal of R, G, B, W four sub-pixels driving voltages for the N group consistent with himself desired signal, therefore, can realize the driving of RGBW four sub-pixels display screens.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. a drive system that is applicable to red, green, blue and white RGBW four sub-pixels display screens is characterized in that, described drive system comprises RGB source drive chip and analog signal conversion unit:
Described RGB source drive chip, the every N group RGB digital drive signals from time schedule controller TCON that is used for receiving is carried out digital-to-analog conversion, obtain the analog drive signal that the N group comprises R, G, B three sub-pixels driving voltages, and described N group is comprised that the analog drive signal of R, G, B three sub-pixels driving voltages outputs to described analog signal conversion unit;
Described analog signal conversion unit, the every N group from described RGB source drive chip that is used for receiving comprises that the analog drive signal of R, G, B three sub-pixels driving voltages is converted to the analog drive signal that the N group comprises R, G, B, W four sub-pixels driving voltages, and the group of the N after will changing comprises that the analog drive signal of R, G, B, W four sub-pixels driving voltages outputs to the effective display area of RGBW four sub-pixels display screens, wherein, described N is positive integer.
2. drive system as claimed in claim 1 is characterized in that, described analog signal conversion unit comprises one to one analog signal conversion subelement of analog drive signal that N respectively comprises R, G, B three sub-pixels driving voltages with described N group:
For arbitrary analog signal conversion subelement, this analog signal conversion subelement carries out the analog addition computing for R, G, the B three sub-pixels driving voltages of the analog drive signal that comprises R, G, B three sub-pixels driving voltages corresponding with this analog signal conversion subelement that will receive, obtain W sub-pixel driving voltage, and described R, G, B three sub-pixels driving voltages and W sub-pixel driving voltage made up, obtain comprising the analog drive signal of R, G, B, W four sub-pixels driving voltages.
3. drive system as claimed in claim 2 is characterized in that, described analog signal conversion subelement comprises operational amplifier, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and the 6th resistance, wherein:
One end of described the first resistance, the second resistance and the 3rd resistance is respectively R, G, the B sub-pixel drive voltage signal input end of described analog signal conversion subelement, and the other end also links to each other with the positive input of described operational amplifier by the 4th resistance eutral grounding and this other end;
One end of described the 5th resistance links to each other with the reverse input end of described operational amplifier, other end ground connection;
One end of described the 6th resistance links to each other with the reverse input end of described operational amplifier, the other end links to each other with the output terminal of described operational amplifier, wherein, the output terminal of described operational amplifier is the W sub-pixel drive voltage signal output terminal of described analog signal conversion subelement; And,
Described analog signal conversion subelement also comprises respectively one by one corresponding R, G, the B sub-pixel drive voltage signal output terminal that links to each other of R, G by wire and described analog signal conversion subelement, B sub-pixel drive voltage signal input end.
4. drive system as claimed in claim 3 is characterized in that,
Described analog signal conversion unit and is arranged in described RGBW four sub-pixels display screens between the effective display area of RGB source drive chip and RGBW four sub-pixels display screens.
5. drive system as claimed in claim 4 is characterized in that,
Described the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and the 6th resistance are formed by the tin indium oxide ITO in the described RGBW four sub-pixels display screens;
Described operational amplifier is formed by thin film transistor (TFT) TFT.
6. drive system as claimed in claim 3 is characterized in that,
The resistance value of described the 4th resistance, the 5th resistance and the 6th resistance is identical;
The resistance value of described the first resistance, the second resistance and the 3rd resistance is identical, and the resistance value of described the first resistance is three times of resistance value of described the 4th resistance.
7. drive system as claimed in claim 3 is characterized in that,
The resistance value of described the 4th resistance, the 5th resistance and the 6th resistance is identical;
The resistance value of described the first resistance, the second resistance and the 3rd resistance becomes different preset proportion from the resistance value of described the 4th resistance respectively.
8. the driving method based on the RGBW four sub-pixels display screens of the arbitrary described drive system of claim 1 ~ 7 is characterized in that, described method comprises:
The N that the analog signal conversion unit receives the output of RGB source drive chip organizes the analog drive signal that comprises R, G, B three sub-pixels driving voltages, and wherein, described N is positive integer;
Every group of analog drive signal that comprises R, G, B three sub-pixels driving voltages that the analog signal conversion unit will receive is converted to respectively the analog drive signal that comprises R, G, B, W four sub-pixels driving voltages, and every group of analog drive signal that comprises R, G, B, W four sub-pixels driving voltages after will changing outputs to the effective display area of RGBW four sub-pixels display screens.
9. driving method as claimed in claim 8 is characterized in that, described analog signal conversion unit comprises one to one analog signal conversion subelement of analog drive signal that N respectively comprises R, G, B three sub-pixels driving voltages with described N group;
The every group of analog drive signal that comprises R, G, B three sub-pixels driving voltages that receives is converted to respectively the analog drive signal that comprises R, G, B, W four sub-pixels driving voltages, specifically comprises:
Comprise R for arbitrary group, G, the analog drive signal of B three sub-pixels driving voltages, by organizing the corresponding analog signal conversion subelement of analog drive signal to the R in this group analog drive signal with this, G, B three sub-pixels driving voltages carry out the analog addition computing, obtain W sub-pixel driving voltage, and, by organizing the corresponding analog signal conversion subelement of analog drive signal with described R with this, G, B three sub-pixels driving voltages and W sub-pixel driving voltage make up, and obtain comprising R, G, B, the analog drive signal of W four sub-pixels driving voltages.
10. driving method as claimed in claim 9 is characterized in that, described analog signal conversion subelement comprises operational amplifier, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and the 6th resistance, wherein:
One end of described the first resistance, the second resistance and the 3rd resistance is respectively R, G, the B sub-pixel drive voltage signal input end of described analog signal conversion subelement, and the other end also links to each other with the positive input of described operational amplifier by the 4th resistance eutral grounding and this other end;
One end of described the 5th resistance links to each other with the reverse input end of described operational amplifier, other end ground connection;
One end of described the 6th resistance links to each other with the reverse input end of described operational amplifier, the other end links to each other with the output terminal of described operational amplifier, wherein, the output terminal of described operational amplifier is the W sub-pixel drive voltage signal output terminal of described analog signal conversion subelement; And,
Described analog signal conversion subelement also comprises respectively one by one corresponding R, G, the B sub-pixel drive voltage signal output terminal that links to each other of R, G by wire and described analog signal conversion subelement, B sub-pixel drive voltage signal input end.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505052A (en) * | 2014-09-18 | 2015-04-08 | 深圳市华星光电技术有限公司 | Method and device for image data processing |
| CN105719603A (en) * | 2014-12-01 | 2016-06-29 | Tcl集团股份有限公司 | RGBW (Red Green Blue White) data output method and device |
| US9454926B2 (en) | 2014-09-18 | 2016-09-27 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Image data processing method and device of using the same |
| CN106251801A (en) * | 2016-08-09 | 2016-12-21 | 上海展荟诗实业有限公司 | A kind of RGB scalable color light emitting device drive system and method |
| CN106356016A (en) * | 2016-10-31 | 2017-01-25 | 昆山国显光电有限公司 | Display method and display device for correspondingly arranging four-color pixels |
| WO2017215029A1 (en) * | 2016-06-12 | 2017-12-21 | 深圳市华星光电技术有限公司 | Data drive circuit of amoled display apparatus |
| CN111785225A (en) * | 2020-07-07 | 2020-10-16 | 深圳市华星光电半导体显示技术有限公司 | White balance adjusting method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1545082A (en) * | 2003-11-28 | 2004-11-10 | 友达光电股份有限公司 | Equipment and method for improving separation of gamma curve |
| CN1731500A (en) * | 2005-08-15 | 2006-02-08 | 友达光电股份有限公司 | Color conversion method and circuit |
| JP2006163068A (en) * | 2004-12-08 | 2006-06-22 | Sanyo Electric Co Ltd | Signal processing circuit of self-luminous display device |
| US20060215191A1 (en) * | 2005-03-22 | 2006-09-28 | Sanyo Electric Co., Ltd. | Display apparatus |
| CN101059936A (en) * | 2006-04-18 | 2007-10-24 | 统宝光电股份有限公司 | Image display systems and methods for providing driving voltages |
| US20080252797A1 (en) * | 2007-04-13 | 2008-10-16 | Hamer John W | Method for input-signal transformation for rgbw displays with variable w color |
-
2012
- 2012-12-10 CN CN201210530847.1A patent/CN103021316B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1545082A (en) * | 2003-11-28 | 2004-11-10 | 友达光电股份有限公司 | Equipment and method for improving separation of gamma curve |
| JP2006163068A (en) * | 2004-12-08 | 2006-06-22 | Sanyo Electric Co Ltd | Signal processing circuit of self-luminous display device |
| US20060215191A1 (en) * | 2005-03-22 | 2006-09-28 | Sanyo Electric Co., Ltd. | Display apparatus |
| CN1731500A (en) * | 2005-08-15 | 2006-02-08 | 友达光电股份有限公司 | Color conversion method and circuit |
| CN101059936A (en) * | 2006-04-18 | 2007-10-24 | 统宝光电股份有限公司 | Image display systems and methods for providing driving voltages |
| US20080252797A1 (en) * | 2007-04-13 | 2008-10-16 | Hamer John W | Method for input-signal transformation for rgbw displays with variable w color |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505052A (en) * | 2014-09-18 | 2015-04-08 | 深圳市华星光电技术有限公司 | Method and device for image data processing |
| US9454926B2 (en) | 2014-09-18 | 2016-09-27 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Image data processing method and device of using the same |
| CN104505052B (en) * | 2014-09-18 | 2017-01-25 | 深圳市华星光电技术有限公司 | Method and device for image data processing |
| CN105719603A (en) * | 2014-12-01 | 2016-06-29 | Tcl集团股份有限公司 | RGBW (Red Green Blue White) data output method and device |
| CN105719603B (en) * | 2014-12-01 | 2018-07-13 | Tcl集团股份有限公司 | A kind of RGBW data output method and device |
| WO2017215029A1 (en) * | 2016-06-12 | 2017-12-21 | 深圳市华星光电技术有限公司 | Data drive circuit of amoled display apparatus |
| CN106251801A (en) * | 2016-08-09 | 2016-12-21 | 上海展荟诗实业有限公司 | A kind of RGB scalable color light emitting device drive system and method |
| CN106356016A (en) * | 2016-10-31 | 2017-01-25 | 昆山国显光电有限公司 | Display method and display device for correspondingly arranging four-color pixels |
| CN111785225A (en) * | 2020-07-07 | 2020-10-16 | 深圳市华星光电半导体显示技术有限公司 | White balance adjusting method and device |
| CN111785225B (en) * | 2020-07-07 | 2022-04-12 | 深圳市华星光电半导体显示技术有限公司 | White balance adjusting method and device |
| US11735130B2 (en) | 2020-07-07 | 2023-08-22 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | White balance adjusting method and electronic equipment |
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|---|---|
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