CN103021316B - A kind of drive system and method being applicable to RGBW tetra-sub-pixels display screen - Google Patents
A kind of drive system and method being applicable to RGBW tetra-sub-pixels display screen Download PDFInfo
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Abstract
The invention discloses a kind of drive system and the method that are applicable to red, green, blue and white RGBW tetra-sub-pixels display screen, described drive system comprises: comprise R for the every N group RGB digital drive signals from time schedule controller received is converted to N group, G, the analog drive signal of B tri-sub-pixels driving voltage also outputs to the RGB source drive chip of simulating signal converting unit, and for the every N group from RGB source drive chip is comprised R, G, the analog drive signal of B tri-sub-pixels driving voltage is converted to N group and comprises R, G, B, the analog drive signal of W tetra-sub-pixels driving voltage also outputs to the simulating signal converting unit of the effective display area of RGBW tetra-sub-pixels display screen, wherein, described N is positive integer.By scheme of the present invention, can realize utilizing RGB source drive chip to drive the effect of RGBW display screen, the complexity simplifying system, the driving cost saving system.
Description
Technical field
The present invention relates to display screen Driving technique field, particularly relate to one and be applicable to RGBW(red, green, blue, white) drive system of four sub-pixels display screens and method.
Background technology
With TFT-LCD(Thin Film Transistor-Liquid Crystal Display, TFT-LCD display screen) compare, AMOLED(Active-Matrix Organic Light Emitting Diode, active matrix organic light-emitting diode) display screen has more advantage, such as: without the need to backlight, fast response time, contrast is high, visual angle is wide, energy consumption is low and can realize soft display etc., has significant progress in the flat display field in future.But, because AMOLED exists the problems such as lack of homogeneity, threshold value drift, luminescence efficiency low and serviceable life is short in the fabrication process, therefore, current industry often uses the mode of interior pixels Compensation Design (increasing TFT number and electric capacity number in sub-pixel), compensate the threshold deviation of AMOLED, improve the show uniformity of AMOLED.But, when adopting the mode of interior pixels Compensation Design to compensate the threshold deviation of AMOLED, greatly can reduce the pixel aperture ratio of AMOLED, cause AMOLED brightness of display screen to reduce, for this kind of situation, industry further provides the Pixel Design mode of RGBW tetra-sub-pixels, by increasing a white sub-pixels in the pixel basis of original RGB tri-sub-pixels, solving the problem that AMOLED brightness of display screen declines, improving the general brightness of AMOLED display screen.
In addition, utilizing WOLED(White Organic Light Emitting Diode, white organic LED) technological development large-sized AMOLED display screen time also can adopt the Pixel Design mode of above-mentioned RGBW, particularly, by W light-emitting zone reserved on original rgb pixel basis of WOLED, and the color film of this W light-emitting zone position is removed, the pixel of RGBW mode can be obtained.
Further, because the Source Driver chip (source drive chip) at present for each display screen provides the TCON(time schedule controller of drive singal) received by raw data be generally RGB digital drive signals, and the drive singal required for RGBW display screen (as AMOLED display screen) is for comprising R, G, B, the analog drive signal of W tetra-sub-pixels driving voltage, therefore, for RGBW tetra-sub-pixels display screen, how this original RGB digital drive signals is converted to and comprises R, G, B, the analog drive signal of W tetra-sub-pixels driving voltage, and then realize the problem be driven into as primarily solving of RGBW display screen.At present, the mode that industry generally adopts digital signal to change is to realize the conversion of RGB data to RGBW data, that is, after RGB digital drive signals enters into TCON, by this TCON, a series of data processing operation is carried out to the RGB digital drive signals received and obtain RGBW digital drive signals, and the RGBW digital drive signals obtained is passed to Source Driver chip, afterwards, by this Source Driver chip, the RGBW digital drive signals received is carried out digital-to-analog conversion, obtain comprising R, G, B, the analog drive signal of W tetra-sub-pixels driving voltage also outputs in AMOLED display screen, realize the driving to this AMOLED display screen, concrete data conversion process can be as shown in Figure 1.
But, adopt aforesaid way this original RGB digital drive signals to be converted to comprise R, G, B, W tetra-sub-pixels driving voltage analog drive signal so that realize the driving of RGBW display screen time, there are the following problems:
1) described Source Driver chip is required to be the chip can supporting that RGBW classes of pixels drives, existing RGB source drive chip cannot use, reason is that existing RGB source drive chip has RGB independently Gamma circuit (gray level circuit) correspondence, its output terminal is every 3 passage one-periods, and RGBW display screen every 4 passage one-periods really, the two can not correspondingly connect;
2) in existing data transfer method, TCON needs to carry out complicated data processing, adds burden and the design complexities of TCON;
3) in existing data transfer method, the volume of transmitted data between TCON and Source Driver chip is comparatively large, and improve signal transmission frequencies, what add system realizes difficulty and EMI(electromagnetic interference (EMI)) risk;
4) in existing data transfer method, the output channel quantity of Source Driver chip is 4/3 times under RGB mode, increase due to output channel quantity can cause the increase of Source Driver number of chips, therefore, can the driving cost of further increase system and the complexity of system.
That is, adopting the mode of existing digital signal conversion this original RGB digital drive signals is converted to comprise R, G, B, W tetra-sub-pixels driving voltage analog drive signal so that realize the driving of RGBW display screen time, existing RGB source drive chip can not be utilized to drive RGBW display screen, also can there is the problem that volume of transmitted data is comparatively large, system complexity is higher and driving cost is higher simultaneously.
Summary of the invention
Embodiments provide a kind of drive system and the method that are applicable to RGBW tetra-sub-pixels display screen, in order to solve utilizing of existing in prior art, the volume of transmitted data caused during RGBW source drive chip driving RGBW display screen is comparatively large, system complexity is higher and drive the problem that cost is higher.
Be applicable to a drive system for RGBW tetra-sub-pixels display screen, comprise:
RGB source drive chip, for the every N group RGB digital drive signals from TCON received is carried out digital-to-analog conversion, obtain N group and comprise R, G, B tri-analog drive signal of sub-pixels driving voltage, and described N group is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage output to simulating signal converting unit;
Simulating signal converting unit, for the every N group from RGB source drive chip received is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage be converted to N group and comprise R, G, B, W tetra-analog drive signal of sub-pixels driving voltage, and the N group after conversion is comprised R, G, B, W tetra-the analog drive signal of sub-pixels driving voltage output to the effective display area of RGBW tetra-sub-pixels display screen, wherein, described N is positive integer.
Based on a driving method for the RGBW tetra-sub-pixels display screen of above-mentioned drive system, described method comprises:
Simulating signal converting unit receives N group that RGB source drive chip exports and comprises R, G, B tri-analog drive signal of sub-pixels driving voltage, and wherein, described N is positive integer;
Simulating signal converting unit the often group received is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage be converted to respectively and comprise R, G, B, W tetra-analog drive signal of sub-pixels driving voltage, and the often group after conversion is comprised R, G, B, W tetra-the analog drive signal of sub-pixels driving voltage output to the effective display area of RGBW tetra-sub-pixels display screen.
Beneficial effect of the present invention is as follows:
Embodiments provide a kind of drive system and the method that are applicable to RGBW tetra-sub-pixels display screen, described drive system comprises RGB source drive chip and simulating signal converting unit, wherein, described RGB source drive chip is used for the every N group RGB digital drive signals from TCON received to carry out digital-to-analog conversion, obtain N group and comprise R, G, B tri-analog drive signal of sub-pixels driving voltage, and described N group is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage output to simulating signal converting unit; Described simulating signal converting unit be used for the every N group from RGB source drive chip received to comprise R, G, B tri-the analog drive signal of sub-pixels driving voltage be converted to N group and comprise R, G, B, W tetra-analog drive signal of sub-pixels driving voltage, and the N group after conversion is comprised R, G, B, W tetra-the analog drive signal of sub-pixels driving voltage output to the effective display area of RGBW tetra-sub-pixels display screen, wherein, described N is positive integer.By technical scheme of the present invention, can realize utilizing RGB source drive chip to drive the effect of RGBW display screen, solve exist in prior art utilize RGBW source drive chip to drive RGBW display screen time the volume of transmitted data that causes comparatively large, system complexity is higher and drive the problem that cost is higher, greatly simplifie the complexity of system and save the driving cost of system.
Accompanying drawing explanation
Figure 1 shows that in prior art the mode adopting digital signal to change original RGB digital drive signals is converted to comprise R, G, B, W tetra-sub-pixels driving voltage analog drive signal so that realize the structural representation of driving of RGBW display screen;
Figure 2 shows that the structural representation of the drive system being applicable to RGBW tetra-sub-pixels display screen described in the embodiment of the present invention one;
Figure 3 shows that the electrical block diagram of the conversion of simulating signal described in the embodiment of the present invention one subelement;
Figure 4 shows that the schematic flow sheet of the driving method being applicable to RGBW tetra-sub-pixels display screen described in the embodiment of the present invention two.
Embodiment
Below in conjunction with Figure of description, embodiments of the present invention is further illustrated, 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 tetra-sub-pixels display screen described in the embodiment of the present invention one, described drive system comprises RGB source drive chip 11 and simulating signal converting unit 12, the RGB digital drive signals for receiving from external system can also be comprised, and the RGB digital drive signals received is outputted to TCON13 and the RGBW tetra-sub-pixels display screen 14 etc. of RGB source drive chip 11, wherein:
Described RGB source drive chip 11 is for receiving the RGB digital drive signals from TCON13, and the every N group RGB digital drive signals from TCON13 received is carried out digital-to-analog conversion, obtain N group and comprise R, G, B tri-analog drive signal of sub-pixels driving voltage, and, described N group is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage output to simulating signal converting unit 12, wherein, described N is positive integer; Particularly, the numerical value of described N is identical with the number of the pixel column comprised in RGBW tetra-sub-pixels display screen 14.
Particularly, described RGB source drive chip 11 is after receiving the RGB digital drive signals from TCON13, data buffering storage can be carried out at chip internal, after often obtaining N group RGB digital drive signals, this N group RGB digital drive signals is carried out digital-to-analog conversion, obtain the N group after changing and comprise R, G, B tri-analog drive signal of sub-pixels driving voltage, and the N group after described conversion is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage output to simulating signal converting unit 12.
Described simulating signal converting unit 12 for the every N group from RGB source drive chip 11 received is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage be converted to N group and comprise R, G, B, W tetra-analog drive signal of sub-pixels driving voltage, and the N group after conversion is comprised R, G, B, W tetra-the analog drive signal of sub-pixels driving voltage output to the effective display area of RGBW tetra-sub-pixels display screen 14, wherein, described N is positive integer.
Particularly, due in embodiments of the present invention, the final received analog drive signal in the effective display area of RGBW tetra-sub-pixels display screen 14 is that the N group consistent with himself desired signal comprises R, G, B, W tetra-analog drive signal of sub-pixels driving voltage, therefore, the driving of RGBW tetra-sub-pixels display screen 14 can be realized.
It should be noted that, in various embodiments of the present invention, described RGBW tetra-sub-pixels display screen 14(can referred to as RGBW display screen) can be AMOLED display screen etc., the embodiment of the present invention is not limited in any way this; In addition, described RGB source drive chip 11 and TCON13 etc. are conventional die; It should be noted that again, described simulating signal converting unit 12 can for be arranged in RGB source drive chip 11 and RGBW tetra-sub-pixels display screen 14 effective display area between and be positioned at the autonomous device of described RGBW tetra-sub-pixels display screen 14, also can for be arranged in RGB source drive chip 11 and RGBW tetra-sub-pixels display screen 14 effective display area between and be positioned at the integrated equipment of described RGBW tetra-sub-pixels display screen 14, the embodiment of the present invention is not also limited in any way this.
Particularly, in various embodiments of the present invention, described simulating signal converting unit 12 comprise N number of comprise with described N group respectively R, G, B tri-sub-pixels driving voltage analog drive signal one to one simulating signal change subelement 121:
For arbitrary simulating signal conversion subelement 121, this simulating signal conversion subelement 121 for by receive with this simulating signal change subelement 121 corresponding comprise R, G, B tri-sub-pixels driving voltage analog drive signal in R, G, B tri-sub-pixels driving voltage carry out analog addition computing, obtain W sub-pixel driving voltage, and by described R, G, B tri-sub-pixels driving voltage and W sub-pixel driving voltage combine, obtain comprising R, G, B, W tetra-analog drive signal of sub-pixels driving voltage.
Further, as shown in Figure 3, it can be the analog addition circuit of three inputs that described simulating signal changes subelement 121, comprises operational amplifier OA1, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6, wherein:
One end of described first resistance R1, the second resistance R2 and the 3rd resistance R3 is respectively R, G, B sub-pixel drive voltage signal input end (Vrin, Vgin, Vbin as shown in Figure 3) of described simulating signal conversion subelement 121, and the other end passes through the 4th resistance R4 ground connection and this other end is also connected with the positive input of described operational amplifier OA1;
One end of described 5th resistance R5 is connected with the reverse input end of described operational amplifier OA1, other end ground connection;
One end of described 6th resistance R6 is connected with the reverse input end of described operational amplifier OA1, the other end is connected 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 simulating signal conversion subelement 121; And,
Described simulating signal conversion subelement 121 also comprises R, G, B sub-pixel drive voltage signal output terminal (Vrout, Vgout, Vbout as shown in Figure 3) that R, G, B sub-pixel drive voltage signal input end one_to_one corresponding of changing subelement 121 respectively by wire and described simulating signal is connected.
Further, the power supply of described operational amplifier OA1 is identical with the analog power of described RGB source drive chip 11, is VDDA and VSSA shown in Fig. 3.
Further, described simulating signal conversion subelement 121 between RGB source drive chip 11 and the effective display area of RGBW tetra-sub-pixels display screen 14, and is arranged in described RGBW tetra-sub-pixels display screen 14.
Further, described first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6 can by the ITO(tin indium oxides in described RGBW tetra-sub-pixels display screen 14) formed, described operational amplifier OA1 can by TFT(thin film transistor (TFT)) formed, the embodiment of the present invention is not limited in any way this.
Further, in various embodiments of the present invention, be the mean value of R, G, B sub-pixel driving voltage three of input to make obtained W sub-pixel driving voltage, the resistance value of described 4th resistance R4, the 5th resistance R5 and the 6th resistance R6 needs identical, the resistance value of described first resistance R1, the second resistance R2 and the 3rd resistance R3 needs identical, and the resistance value of described first resistance R1 is required to be three times of the resistance value of described 4th resistance R4, now, Vwout=(Vrin+Vgin+Vbin)/3.
Further, owing to when W sub-pixel driving voltage being the R of input, G, during the mean value of B sub-pixel driving voltage three, although the actual driving requirement of RGBW display screen substantially can be reached, but the skew of white balance can not be compensated, the brightness of W sub-pixel can not be regulated, the application of low-end product can only be applicable to, therefore, in order to improve the driving effect of drive system described in the embodiment of the present invention further, in various embodiments of the present invention, can at maintenance the 4th resistance R4, on the basis that the resistance value of the 5th resistance R5 and the 6th resistance R6 is identical, adjust the first resistance R1 respectively, the resistance value of the second resistance R2 and the 3rd resistance R3, make the first resistance R1, the resistance value of the second resistance R2 and the 3rd resistance R3 different and all with the 4th resistance R4(or the 5th resistance R5, or the 6th resistance R6) between proportional, thus make the W sub-pixel driving voltage finally obtained meet 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 R1, the second resistance R2 and the 3rd resistance R3 and the 4th resistance R4(or the 5th resistance R5 or the 6th resistance R6 simultaneously) between value relatable, the RGB sub-pixel that proportion is different can be obtained, therefore can reach the effect of the brightness regulating white balance and W sub-pixel.
The embodiment of the present invention one provides a kind of drive system being applicable to RGBW tetra-sub-pixels display screen, described drive system comprises: RGB source drive chip and simulating signal converting unit, wherein, described RGB source drive chip is used for the every N group RGB digital drive signals from TCON received to carry out digital-to-analog conversion, obtain N group and comprise R, G, B tri-analog drive signal of sub-pixels driving voltage, and described N group is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage output to simulating signal converting unit; Described simulating signal converting unit be used for the every N group from RGB source drive chip received to comprise R, G, B tri-the analog drive signal of sub-pixels driving voltage be converted to N group and comprise R, G, B, W tetra-analog drive signal of sub-pixels driving voltage, and the N group after conversion is comprised R, G, B, W tetra-the analog drive signal of sub-pixels driving voltage output to the effective display area of RGBW tetra-sub-pixels display screen, wherein, described N is positive integer.By technical scheme described in the embodiment of the present invention one, can realize utilizing RGB source drive chip to drive the effect of RGBW display screen, solve exist in prior art utilize RGBW source drive chip to drive RGBW display screen time the volume of transmitted data that causes comparatively large, system complexity is higher and drive the problem that cost is higher, greatly simplifie the complexity of system and save 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 tetra-sub-pixels display screen described in the embodiment of the present invention two, described RGBW tetra-sub-pixels display screen (being called for short RGBW display screen) can be AMOLED display screen etc., the embodiment of the present invention is not limited in any way this, particularly, described driving method can comprise the following steps:
Step 101: simulating signal converting unit receives N group that RGB source drive chip exports and comprises R, G, B tri-analog drive signal of sub-pixels driving voltage, and wherein, described N is positive integer.
Particularly, the N group that RGB source drive chip exports comprise R, G, B tri-the analog drive signal of sub-pixels driving voltage be obtain after the RGB digital drive signals from TCON received being carried out digital-to-analog conversion by this RGB source drive chip.
Particularly, RGB source drive chip is after receiving the RGB digital drive signals from TCON, data buffering storage is carried out at chip internal, and after often obtaining N group RGB digital drive signals, this N group RGB digital drive signals is carried out digital-to-analog conversion, obtain the N group after changing and comprise R, G, B tri-analog drive signal of sub-pixels driving voltage, and the N group after described conversion is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage output in simulating signal converting unit.
It should be noted that, in various embodiments of the present invention, described TCON and RGB source drive chip is conventional die; It should be noted that in addition, the numerical value of described N is identical with the number of the pixel column comprised in RGBW display screen.
It should be noted that again, described simulating signal converting unit can for be arranged in RGB source drive chip and RGBW display screen effective display area between and be positioned at the autonomous device of described RGBW display screen, also can for be arranged in RGB source drive chip and RGBW display screen effective display area between and be positioned at the integrated equipment of described RGBW display screen, the embodiment of the present invention is not limited in any way this.
Step 102: simulating signal converting unit the often group received is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage be converted to respectively and comprise R, G, B, W tetra-analog drive signal of sub-pixels driving voltage.
Particularly, described simulating signal converting unit comprise N number of comprise with described N group respectively R, G, B tri-sub-pixels driving voltage analog drive signal one to one simulating signal change subelement.
Further, the often group received is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage be converted to respectively and comprise R, G, B, W tetra-analog drive signal of sub-pixels driving voltage, specifically can comprise:
R is comprised for arbitrary group, G, the analog drive signal of B tri-sub-pixels driving voltage, subelement is changed to the R in this group analog drive signal by the simulating signal corresponding with this group analog drive signal, G, B tri-sub-pixels driving voltage carries out analog addition computing, obtain W sub-pixel driving voltage, and, subelement is changed by described R by the simulating signal corresponding with this group analog drive signal, G, B tri-sub-pixels driving voltage and W sub-pixel driving voltage combine, obtain comprising R, G, B, the analog drive signal of W tetra-sub-pixels driving voltage.
Particularly, as shown in Figure 3 (Fig. 3 is the electrical block diagram of described simulating signal conversion subelement), it can be the analog addition circuit of three inputs that described simulating signal changes subelement, it specifically can comprise operational amplifier OA1, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6, wherein:
One end of described first resistance R1, the second resistance R2 and the 3rd resistance R3 is respectively R, G, B sub-pixel drive voltage signal input end (Vrin, Vgin, Vbin as shown in Figure 3) of described simulating signal conversion subelement 121, and the other end passes through the 4th resistance R4 ground connection and this other end is also connected with the positive input of described operational amplifier OA1;
One end of described 5th resistance R5 is connected with the reverse input end of described operational amplifier OA1, other end ground connection;
One end of described 6th resistance R6 is connected with the reverse input end of described operational amplifier OA1, the other end is connected 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 simulating signal conversion subelement; And,
Described simulating signal conversion subelement also comprises R, G, B sub-pixel drive voltage signal output terminal (Vrout, Vgout, Vbout as shown in Figure 3) that R, G, B sub-pixel drive voltage signal input end one_to_one corresponding of changing subelement respectively by wire and described simulating signal is connected.
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 simulating signal conversion subelement between RGB source drive chip and the effective display area of RGBW display screen, and is arranged in described RGBW display screen.
Further, described first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6 can be formed by the ITO in described RGBW display screen, and described operational amplifier OA1 can be formed by TFT.
Further, in various embodiments of the present invention, be the mean value of R, G, B sub-pixel driving voltage three of input to make obtained W sub-pixel driving voltage, the resistance value of described 4th resistance R4, the 5th resistance R5 and the 6th resistance R6 needs identical, the resistance value of described first resistance R1, the second resistance R2 and the 3rd resistance R3 needs identical, and the resistance value of described first resistance R1 is required to be three times of the resistance value of described 4th resistance R4, now, Vwout=(Vrin+Vgin+Vbin)/3.
Further, owing to when W sub-pixel driving voltage being the R of input, G, during the mean value of B sub-pixel driving voltage three, although the actual driving requirement of RGBW display screen substantially can be reached, but the skew of white balance can not be compensated, the brightness of W sub-pixel can not be regulated, the application of low-end product can only be applicable to, therefore, in order to improve the driving effect of drive system in the embodiment of the present invention further, in various embodiments of the present invention, can at maintenance the 4th resistance R4, on the basis that the resistance value of the 5th resistance R5 and the 6th resistance R6 is identical, adjust the first resistance R1 respectively, the resistance value of the second resistance R2 and the 3rd resistance R3, make the first resistance R1, the resistance value of the second resistance R2 and the 3rd resistance R3 different and all with the 4th resistance R4(or the 5th resistance R5, or the 6th resistance R6) proportional, thus make the W sub-pixel driving voltage finally obtained meet 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 R1, the second resistance R2 and the 3rd resistance R3 and the 4th resistance R4(or the 5th resistance R5 or the 6th resistance R6 simultaneously) between value relatable, the RGB sub-pixel that proportion is different can be obtained, therefore can reach the effect of the brightness regulating white balance and W sub-pixel.
Step 103: the often group after conversion is comprised R, G, B, W tetra-the analog drive signal of sub-pixels driving voltage output to the effective display area of RGBW tetra-sub-pixels display screen.
Particularly, in this step 103, due to RGBW tetra-sub-pixels display screen effective display area received by analog drive signal be that the N group consistent with himself desired signal comprises R, G, B, W tetra-analog drive signal of sub-pixels driving voltage, therefore, the driving of RGBW tetra-sub-pixels display screen can be realized.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. be applicable to a drive system for red, green, blue and white RGBW tetra-sub-pixels display screen, it is characterized in that, described drive system comprises RGB source drive chip and simulating signal converting unit:
Described RGB source drive chip, for the every N group RGB digital drive signals from time schedule controller TCON received is carried out digital-to-analog conversion, obtain N group and comprise R, G, B tri-analog drive signal of sub-pixels driving voltage, and described N group is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage output to described simulating signal converting unit;
Described simulating signal converting unit, for the every N group from described RGB source drive chip received is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage be converted to N group and comprise R, G, B, W tetra-analog drive signal of sub-pixels driving voltage, and the N group after conversion is comprised R, G, B, W tetra-the analog drive signal of sub-pixels driving voltage output to the effective display area of RGBW tetra-sub-pixels display screen, wherein, described N is positive integer;
Described simulating signal converting unit comprise N number of comprise with described N group respectively R, G, B tri-sub-pixels driving voltage analog drive signal one to one simulating signal change subelement:
For arbitrary simulating signal conversion subelement, this simulating signal conversion subelement be used for by receive with this simulating signal change subelement corresponding comprise R, G, B tri-sub-pixels driving voltage analog drive signal in R, G, B tri-sub-pixels driving voltage carry out analog addition computing, obtain W sub-pixel driving voltage, and by described R, G, B tri-sub-pixels driving voltage and W sub-pixel driving voltage combine, obtain comprising R, G, B, W tetra-analog drive signal of sub-pixels driving voltage;
Described simulating 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 first resistance, the second resistance and the 3rd resistance is respectively R, G, B sub-pixel drive voltage signal input end of described simulating signal conversion subelement, and the other end passes through the 4th resistance eutral grounding and this other end is also connected with the positive input of described operational amplifier;
One end of described 5th resistance is connected with the reverse input end of described operational amplifier, other end ground connection;
One end of described 6th resistance is connected with the reverse input end of described operational amplifier, the other end is connected 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 simulating signal conversion subelement; And,
Described simulating signal conversion subelement also comprises R, G, B sub-pixel drive voltage signal output terminal that R, G, B sub-pixel drive voltage signal input end one_to_one corresponding of changing subelement respectively by wire and described simulating signal is connected.
2. drive system as claimed in claim 1, is characterized in that,
Described simulating signal converting unit between RGB source drive chip and the effective display area of RGBW tetra-sub-pixels display screen, and is arranged in described RGBW tetra-sub-pixels display screen.
3. drive system as claimed in claim 2, is characterized in that,
Described 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 described RGBW tetra-sub-pixels display screen;
Described operational amplifier is formed by thin film transistor (TFT) TFT.
4. drive system as claimed in claim 1, is characterized in that,
The resistance value of described 4th resistance, the 5th resistance and the 6th resistance is identical;
The resistance value of described first resistance, the second resistance and the 3rd resistance is identical, and the resistance value of described first resistance is three times of the resistance value of described 4th resistance.
5. drive system as claimed in claim 1, is characterized in that,
The resistance value of described 4th resistance, the 5th resistance and the 6th resistance is identical;
The resistance value of described first resistance, the second resistance and the 3rd resistance becomes different setting ratios from the resistance value of described 4th resistance respectively.
6., based on a driving method for the RGBW tetra-sub-pixels display screen of the arbitrary described drive system of Claims 1 to 5, it is characterized in that, described method comprises:
Simulating signal converting unit receives N group that RGB source drive chip exports and comprises R, G, B tri-analog drive signal of sub-pixels driving voltage, and wherein, described N is positive integer;
Simulating signal converting unit the often group received is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage be converted to respectively and comprise R, G, B, W tetra-analog drive signal of sub-pixels driving voltage, and the often group after conversion is comprised R, G, B, W tetra-the analog drive signal of sub-pixels driving voltage output to the effective display area of RGBW tetra-sub-pixels display screen.
7. driving method as claimed in claim 6, is characterized in that, described simulating signal converting unit comprise N number of comprise with described N group respectively R, G, B tri-sub-pixels driving voltage analog drive signal one to one simulating signal change subelement;
The often group received is comprised R, G, B tri-the analog drive signal of sub-pixels driving voltage be converted to respectively and comprise R, G, B, W tetra-analog drive signal of sub-pixels driving voltage, specifically comprise:
R is comprised for arbitrary group, G, the analog drive signal of B tri-sub-pixels driving voltage, subelement is changed to the R in this group analog drive signal by the simulating signal corresponding with this group analog drive signal, G, B tri-sub-pixels driving voltage carries out analog addition computing, obtain W sub-pixel driving voltage, and, subelement is changed by described R by the simulating signal corresponding with this group analog drive signal, G, B tri-sub-pixels driving voltage and W sub-pixel driving voltage combine, obtain comprising R, G, B, the analog drive signal of W tetra-sub-pixels driving voltage.
8. driving method as claimed in claim 7, is characterized in that, described simulating 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 first resistance, the second resistance and the 3rd resistance is respectively R, G, B sub-pixel drive voltage signal input end of described simulating signal conversion subelement, and the other end passes through the 4th resistance eutral grounding and this other end is also connected with the positive input of described operational amplifier;
One end of described 5th resistance is connected with the reverse input end of described operational amplifier, other end ground connection;
One end of described 6th resistance is connected with the reverse input end of described operational amplifier, the other end is connected 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 simulating signal conversion subelement; And,
Described simulating signal conversion subelement also comprises R, G, B sub-pixel drive voltage signal output terminal that R, G, B sub-pixel drive voltage signal input end one_to_one corresponding of changing subelement respectively by wire and described simulating signal is connected.
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| 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 |
| 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 |
| CN105895027B (en) * | 2016-06-12 | 2018-11-20 | 深圳市华星光电技术有限公司 | The data drive circuit of AMOLED display device |
| 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 |
| CN106356016B (en) * | 2016-10-31 | 2020-02-11 | 昆山国显光电有限公司 | Four-color pixel arrangement, corresponding display method and display device thereof |
| 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 |
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