CN115050318A - Display driving device with crosstalk compensation and display device comprising same - Google Patents
Display driving device with crosstalk compensation and display device comprising same Download PDFInfo
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- CN115050318A CN115050318A CN202110255335.8A CN202110255335A CN115050318A CN 115050318 A CN115050318 A CN 115050318A CN 202110255335 A CN202110255335 A CN 202110255335A CN 115050318 A CN115050318 A CN 115050318A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
Abstract
A display driving device comprises a pixel row gray scale characteristic value calculating unit, a pixel crosstalk compensation unit and a driving unit, wherein the pixel row gray scale characteristic value calculating unit calculates a pixel row gray scale characteristic value of each pixel row of a display picture frame, and the pixel row gray scale characteristic value is the sum of the pixel gray scale characteristic values of all display pixels of a corresponding pixel row; the pixel crosstalk compensation unit compensates each display pixel of the corresponding pixel row by using a pixel compensation value of each pixel row, wherein the pixel compensation value of each pixel row is generated by comparing the pixel row gray scale characteristic value of the pixel row with a plurality of preset pixel row gray scale characteristic thresholds; the driving unit drives the display panel by the display pixels of the display frame after the compensation.
Description
Technical Field
The present invention relates to a display driving device, and more particularly, to a display driving device with crosstalk compensation and a display device including the same.
Background
The brightness displayed by a flat display panel, such as an Organic Light Emitting Diode (OLED) panel, is often affected by the picture in the neighboring area, resulting in a non-uniform brightness state of the picture, wherein the condition of an extension line of a black and white boundary line is more obvious, which is caused by crosstalk (crosstalk) phenomenon that mutual interference is generated between signals.
Fig. 1 shows a frame of a display frame (frame) to illustrate the crosstalk phenomenon, and as shown in the figure, the display frame has a black block, when driving to the display scan line S (x-1), since the display screen is white, the voltage of the display data line D (a) is at a low potential (L), and when the display data line D (a) is driven to the display scanning line S (x), since the image displays black blocks, the voltage of the display data lines D (a) is changed from low potential (L) to high potential (H), when driving to the display scanning line S (x +1), the image displays black blocks, so the voltage of the display data line D (a) is high (H), since the voltage of the display data line d (a) changes from the low potential (L) to the high potential (H) to affect the operating voltage (ELVDD) of the pixel units in the same row (row) of the display panel, a rising spike is generated in the operating voltage.
Furthermore, when the display scan line S (y) is driven, the display screen still displays black blocks, so the voltage of the display data line d (a) is high (H), and when the display scan line S (y +1) is driven, the display screen is white, so the voltage of the display data line d (a) is changed from high (H) to low (L), when the display scan line S (y +2) is driven, the display screen is white, so the voltage of the display data line d (a) is low (L), and since the change of the voltage of the display data line d (a) from high (H) to low (L) affects the operating voltage (ELVDD) of the pixel units in the same row (row) of the display panel, a sudden drop wave is generated on the operating voltage.
Therefore, for the display data line d (b) shown in fig. 1, the working voltages of the pixel rows corresponding to the display scanning lines S (x) and S (y +1) are disturbed to generate the rising spike and the falling spike, which also affects the display of the display data line d (b), resulting in the uneven brightness of the display panel.
In order to solve the problem of uneven brightness of the display panel caused by the crosstalk, a direct solution is to compensate the voltage of the display data line according to the surge variation of the operating voltage of the pixel row, for example, the voltage of the display data line d (b) varies according to the surge variation of the operating voltage, and the compensation method is affected by the time delay and cannot compensate the voltage of the display data line correctly, so as to meet the actual requirement.
Therefore, there are still many disadvantages in the conventional design of crosstalk compensation for display panels, and there is a need for improvement.
Disclosure of Invention
The present invention is directed to a display driving device with crosstalk compensation and a display device including the same, wherein the display driving device utilizes an algorithm to analyze image content of a display frame to calculate a pixel row gray scale characteristic value of each pixel row, and obtains a pixel row compensation value of each display pixel by comparing a pixel row gray scale characteristic threshold, so as to perform compensation to effectively reduce the influence of crosstalk.
According to one aspect of the present invention, a display driving apparatus for driving a display panel to display a display frame on the display panel, the display frame having a plurality of pixel rows, each pixel row having a plurality of display pixels, a pixel value of each display pixel including at least one color value, the display driving apparatus comprises: a pixel row gray scale characteristic value calculating unit, configured to calculate a pixel row gray scale characteristic value of each pixel row of the display frame, where the pixel row gray scale characteristic value is a sum of pixel gray scale characteristic values of all display pixels of a corresponding pixel row, the pixel gray scale characteristic value of each display pixel is generated by comparing a pixel color integration value of the display pixel with a plurality of preset pixel gray scale characteristic thresholds, and the pixel color integration value of each display pixel is a sum of pixel values of all colors of the display pixel multiplied by corresponding weights; a pixel crosstalk compensation unit, which compensates each display pixel of the corresponding pixel row by using a pixel compensation value of each pixel row, wherein the pixel compensation value of each pixel row is generated according to the comparison of the pixel row gray-scale characteristic value of the pixel row with a plurality of preset pixel row gray-scale characteristic thresholds; and a driving unit for driving the display panel by the compensated display pixels of the display frame.
According to another aspect of the present invention, a display device includes: a display panel; and a display driving device for driving the display panel to display a display frame on the display panel, the display frame having a plurality of pixel rows, each pixel row having a plurality of display pixels, a pixel value of each display pixel including at least one color value, the display driving device comprising: a pixel row gray scale characteristic value calculating unit, configured to calculate a pixel row gray scale characteristic value of each pixel row of the display frame, where the pixel row gray scale characteristic value is a sum of pixel gray scale characteristic values of all display pixels of a corresponding pixel row, the pixel gray scale characteristic value of each display pixel is generated by comparing a pixel color integration value of the display pixel with a plurality of preset pixel gray scale characteristic thresholds, and the pixel color integration value of each display pixel is a sum of pixel values of all colors of the display pixel multiplied by corresponding weights; a pixel crosstalk compensation unit for compensating each display pixel of the corresponding pixel row by using a pixel compensation value of each pixel row, wherein the pixel compensation value of each pixel row is generated by comparing the pixel row gray scale characteristic value of the pixel row with a plurality of preset pixel row gray scale characteristic thresholds; and a driving unit for driving the display panel with the compensated display pixels of the display frame.
Drawings
FIG. 1 shows a display frame to illustrate the crosstalk phenomenon.
Fig. 2 shows a schematic diagram of a display device according to the present invention.
FIG. 3 is a block diagram illustrating an exemplary operation of a pixel row gray scale characteristic value calculating unit according to the present invention.
Fig. 4 shows an exemplary operation of the pixel crosstalk compensation unit according to the present invention.
FIG. 5 shows an exemplary test for crosstalk compensation according to the present invention.
Fig. 6 shows another exemplary test for crosstalk compensation according to the present invention.
Pixel row gray-scale characteristic value calculating unit 23
Pixel crosstalk compensation unit 25
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific examples described herein are merely illustrative of the embodiments of the invention and are not intended to limit the invention.
Fig. 2 shows a schematic diagram of a display device according to the present invention, which includes a display panel 10 and a display driving device 20, the display driving device 20 has a driving unit 21, a pixel row gray scale characteristic value calculating unit 23, and a pixel crosstalk compensating unit 25. Wherein the display driving device 20 is configured to drive the display panel 10 to display the display frame 30 on the display panel 10, the display frame 30 has a plurality of pixel rows 31, each pixel row 31 has a plurality of display pixels 311, each display pixel 311 includes at least one display sub-pixel of a specific color, that is, the pixel value of each display pixel 311 includes at least one color value, in one embodiment and the following description of the present invention, each display pixel 311 of the display frame 30 includes a red display sub-pixel, a green display sub-pixel and a blue display sub-pixel, that is, the pixel value of each display pixel 311 includes a red color value (R), a green color value (G) and a blue color value (B), in other embodiments, the display sub-pixels in the display pixels 311 may be a combination of different colors, and thus the present invention is not limited to the combination of the colors of the display sub-pixels.
The pixel row gray scale characteristic value calculating unit 23 is configured to calculate a pixel row gray scale characteristic value K of each pixel row 31 of the display frame 30, where the pixel row gray scale characteristic value K is a sum of pixel gray scale characteristic values q of all the display pixels 311 of the corresponding pixel row 31, and the pixel gray scale characteristic value q of each display pixel 311 is a value generated by comparing a pixel color integration value v of the display pixel 311 with a plurality of preset pixel gray scale characteristic thresholds th, where the pixel color integration value v of each display pixel 311 is a sum of pixel values (R/G/B) of all colors of the display pixel 311 multiplied by corresponding weights respectively.
The values of the pixel gray-scale characteristic thresholds th are integers greater than 0 and sequentially increase, so that a plurality of numerical value ranges can be defined in the numerical values greater than 0, the plurality of numerical value ranges respectively correspond to a plurality of preset pixel gray-scale characteristic values q ', and the plurality of preset pixel gray-scale characteristic values q ' are sequentially decreased, for example, sequentially decreased to 0, so that the pixel gray-scale characteristic value q of the display pixel 311 can be obtained as the preset pixel gray-scale characteristic value q ' corresponding to the numerical value range according to which numerical value range the pixel color integrated value v is located.
Referring to fig. 3, an exemplary operation of the pixel row gray scale characteristic value calculating unit 23 according to the present invention shows that a pixel value (R/G/B) of a display pixel 311 of a pixel row 31 has a red color value R, a green color value G and a blue color value B, wherein weights of the red color value R, the green color value G and the blue color value B are wr, wg and wb, respectively, wherein the weights wr, wg and wb are values between 0-1, for example, wr-1/4, wg-1/2 and wb-1/4, and accordingly, a pixel color integration value v of the display pixel 311 is wr × R + wg × G + wb × B. As shown in the example of fig. 3, the plurality of pixel gray scale characteristic thresholds th includes three pixel gray scale characteristic thresholds th1, th2, and th3, wherein 0< th1< th2< th3, so that four value ranges of vs1, vs2, vs3, and vs4 can be defined in the values greater than 0, and the value ranges of vs1, vs2, vs3, and vs4 respectively correspond to four predetermined pixel gray scale characteristic values of q1, q2, q3, and q4, wherein q1> q1> q1> q1 ═ 0, so that the pixel gray scale characteristic value q of the display pixel 311 is the predetermined pixel gray scale characteristic value q1 corresponding to the value range of vs1 (i.e., v is between th1 and th 1).
The gray-scale characteristic value q of each display pixel 311 in a pixel row 31 can be obtained by the above-mentioned method, and the gray-scale characteristic values q of all the display pixels 311 in the pixel row 31 are added up to calculate the gray-scale characteristic value K of the pixel row in each pixel row 31.
Referring to fig. 2 again, the pixel crosstalk compensation unit 25 compensates each display pixel 311 of the corresponding pixel row 31 by using a pixel compensation value comp of each pixel row 31, to eliminate the effect of crosstalk, the pixel compensation value comp of each pixel row 31 is a value generated by comparing the pixel row gray-scale characteristic value K of the pixel row 31 with a plurality of predetermined pixel row gray-scale characteristic thresholds TH, wherein the values of the plurality of pixel row gray scale characteristic thresholds TH are integers greater than 0 and increase in sequence, so that a plurality of numerical ranges can be defined among the values greater than 0, the numerical ranges respectively correspond to the plurality of predetermined pixel compensation values comp ', and the plurality of predetermined pixel compensation values comp' increase in sequence, for example, sequentially increased from 0, so that according to which value range the gray scale characteristic value K bit of the pixel row is located, the pixel compensation value comp of the display pixel 311 corresponding to the pixel row 31 can be obtained as the predetermined pixel compensation value comp' corresponding to the value range.
Referring to fig. 4, an exemplary operation of the pixel crosstalk compensation unit 25 according to the present invention is shown, in which a pixel row 31 has a pixel row gray scale characteristic value K, and a display pixel 311 of the pixel row 31 has a display pixel value (R, G, B), a plurality of pixel row gray scale characteristic thresholds TH includes three pixel row gray scale characteristic thresholds TH1, TH2, TH3, wherein 0< TH1< TH 5 < TH3, so that four ranges of values VS1, VS2, VS3, VS4 are defined in values greater than 0, the ranges of values VS1, VS2, VS3, and VS4 respectively correspond to four predetermined pixel row compensation values comp1, comp2, comp3, and comp4, wherein 0-comp 1-36311, so that the range of values corresponding to the pixel row compensation pixel value K of the pixel row 31 is obtained as the predetermined pixel row gray scale characteristic value TH1, the range of the pixel row compensation pixel value TH1, the TH1 is between the predetermined pixel range 1 (1) and the predetermined pixel range 1, for example, the TH1, the display pixel range 1 is 1, the pixel crosstalk compensation unit 25 compensates the pixel value (R/G/B) of the display pixel 311 according to the pixel compensation value comp, where the compensated pixel value (R '/G '/B ') is:
R’＝R-comp＝R-comp2，
G’＝G-comp＝G-comp2，
B’＝B-comp＝B-comp2，
in this way, each display pixel 311 of each pixel row 31 of the display frame 30 can be compensated, so that the driving unit 21 can drive the display panel 10 with the compensated display pixels 311 of the display frame 30 to correctly perform display without being affected by crosstalk.
FIG. 5 shows an exemplary crosstalk compensation process according to the present invention, in which the display frame 30 has white regions A, B, C and black regions D1, D2, the white region B is located between the black regions D1, D2 and needs to be compensated, the pixel values of the white regions A, B, C are (255 ), the pixel values of the black regions D1, D2 are (0,0,0), and the pixel value of the white region B after being compensated by the crosstalk compensation process of the present invention is (254,254,254).
FIG. 6 is a cross-talk compensation in accordance with another exemplary embodiment of the present invention, showing white regions A, X, B, C, D, E, F, G, H, I, J to be compensated, wherein the white region X will not be compensated because the black region adjacent to the white region X is small and the pixel compensation value comp of the white region X is calculated to be 0; in the area needing compensation, the original pixel value of the white area A is (255 ), and the compensated pixel value is (253,253,253); the original pixel value of the white region B is (255 ), and the compensated pixel value is (253,253,253); the original pixel value of the white region C is (255 ), and the compensated pixel value is (254,254,254); the original pixel value of the white area D is (255 ), and the compensated pixel value is (253,253,253); the original pixel value of the white area E is (255 ), and the compensated pixel value is (253,253,253); the original pixel value of the white region F is (255 ), and the compensated pixel value is (253,253,253); the original pixel value of the white region G is (255 ), and the compensated pixel value is (254,254,254); the original pixel value of the white region H is (255 ), and the compensated pixel value is (253,253,253); the original pixel value of the white area I is (255 ), and the compensated pixel value is (254,254,254); the original pixel value of the white region J is (255 ), and the compensated pixel value is (254,254,254).
From the above description, the present invention utilizes an algorithm to analyze the image content of the display frame to calculate the pixel row gray scale characteristic value of each pixel row, and then obtains the pixel row compensation value of each display pixel by comparing the pixel row gray scale characteristic threshold, thereby effectively improving and reducing the crosstalk phenomenon by changing the pixel value of the display frame.
The above-described embodiments are merely exemplary for convenience in explanation, and the scope of the claims of the present invention should be determined by the claims rather than by the limitations of the above-described embodiments.
Claims (10)
1. A display driving apparatus for driving a display panel to display a display frame on the display panel, the display frame having a plurality of pixel rows, each pixel row having a plurality of display pixels, a pixel value of each display pixel including at least one color value, the display driving apparatus comprising:
a pixel row gray scale characteristic value calculating unit, configured to calculate a pixel row gray scale characteristic value of each pixel row of the display frame, where the pixel row gray scale characteristic value is a sum of pixel gray scale characteristic values of all display pixels of a corresponding pixel row, the pixel gray scale characteristic value of each display pixel is generated by comparing a pixel color integration value of the display pixel with a plurality of preset pixel gray scale characteristic thresholds, and the pixel color integration value of each display pixel is a sum of pixel values of all colors of the display pixel multiplied by corresponding weights;
a pixel crosstalk compensation unit, which compensates each display pixel of the corresponding pixel row by using a pixel compensation value of each pixel row, wherein the pixel compensation value of each pixel row is generated according to the comparison of the pixel row gray-scale characteristic value of the pixel row with a plurality of preset pixel row gray-scale characteristic thresholds; and
and the driving unit drives the display panel by the compensated display pixels of the display frame.
2. The display driving device as claimed in claim 1, wherein the plurality of pixel gray scale characteristic thresholds are integers greater than 0 and sequentially increase to define a plurality of value ranges respectively corresponding to a plurality of predetermined pixel gray scale characteristic values among the values greater than 0, the plurality of predetermined pixel gray scale characteristic values being sequentially decreased.
3. The display driving device as claimed in claim 2, wherein the pixel gray scale characteristic value of the display pixel is a predetermined pixel gray scale characteristic value corresponding to a numerical range of the pixel color integration value of the display pixel.
4. The display driving device as claimed in claim 2, wherein the plurality of predetermined pixel gray scale characteristic values are sequentially decreased to 0.
5. The display driving device as claimed in claim 1, wherein the pixel value of each display pixel has a red color value, a green color value and a blue color value, and the integrated pixel color value of each display pixel is:
v＝wr×R+wg×G+wb×B，
wherein v represents the pixel color integration value, R represents the red color value, G represents the green color value, B represents the blue color value, and wr, wg, and wb are weights between 0 and 1, respectively.
6. The display driving device as claimed in claim 1, wherein the threshold values of the gray scale characteristics of the pixel rows are integers greater than 0 and increase sequentially, so as to define a plurality of value ranges corresponding to a plurality of predetermined pixel compensation values among the values greater than 0, respectively, the predetermined pixel compensation values increasing sequentially.
7. The display driving device as claimed in claim 6, wherein the pixel compensation value of the display pixel is a predetermined pixel compensation value corresponding to a range of gray scale characteristic values of pixel rows of the pixel row to which the display pixel belongs.
8. The display driving device as claimed in claim 6, wherein the plurality of predetermined pixel compensation values are sequentially increased from 0.
9. The display driving apparatus of claim 7, wherein the pixel value of each display pixel has a red color value, a green color value and a blue color value, and the pixel crosstalk compensation unit compensates the pixel value of the display pixel with the pixel compensation value by:
R’＝R-comp，
G’＝G-comp，
B’＝B-comp，
wherein, R represents the red color value before compensation, G represents the green color value before compensation, B represents the blue color value before compensation, R ' represents the red color value after compensation, G ' represents the green color value after compensation, B ' represents the blue color value after compensation, and comp represents the pixel compensation value.
10. A display device, comprising:
a display panel; and
a display driver for driving a display panel to display a display frame on the display panel, the display frame having a plurality of pixel rows, each pixel row having a plurality of display pixels, a pixel value of each display pixel including at least one color value, the display driver comprising:
a pixel row gray scale characteristic value calculating unit, configured to calculate a pixel row gray scale characteristic value of each pixel row of the display frame, where the pixel row gray scale characteristic value is a sum of pixel gray scale characteristic values of all display pixels of a corresponding pixel row, the pixel gray scale characteristic value of each display pixel is generated by comparing a pixel color integration value of the display pixel with a plurality of preset pixel gray scale characteristic thresholds, and the pixel color integration value of each display pixel is a sum of pixel values of all colors of the display pixel multiplied by corresponding weights;
a pixel crosstalk compensation unit for compensating each display pixel of the corresponding pixel row by using a pixel compensation value of each pixel row, wherein the pixel compensation value of each pixel row is generated by comparing the pixel row gray scale characteristic value of the pixel row with a plurality of preset pixel row gray scale characteristic thresholds; and
and the driving unit drives the display panel by the compensated display pixels of the display frame.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115798372A (en) * | 2022-11-02 | 2023-03-14 | 上海傲显科技有限公司 | Image processing method, system, terminal and computer storage medium |
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| CN115798372A (en) * | 2022-11-02 | 2023-03-14 | 上海傲显科技有限公司 | Image processing method, system, terminal and computer storage medium |
| CN115798372B (en) * | 2022-11-02 | 2023-11-17 | 上海傲显科技有限公司 | Image processing method, system, terminal and computer storage medium |
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