CN109360534B - Pixel driving method - Google Patents
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- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3607—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 by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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Abstract
The invention provides a pixel driving method. The pixel driving method comprises the steps of judging whether a brightness compensation value is larger than a preset threshold value or not by obtaining the brightness compensation value of the sub-pixel of the ith row and the ith column of the jth row; when the brightness compensation value is less than or equal to the preset threshold value, the current display picture can be known not to be a heavy load picture, so that the brightness value of the jth row and ith column of sub-pixels can be directly output without compensating the brightness value, when the brightness compensation value is greater than the preset threshold value, the current display picture can be known to be the heavy load picture, the compensated brightness value of the jth row and ith column of sub-pixels can be output according to the target brightness value of the jth row and ith column of sub-pixels and the brightness compensation value, the heavy load picture is converted into a light load picture, and the problem that the temperature of a source electrode driver under the heavy load picture is overhigh is solved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a pixel driving method.
Background
Thin Film Transistors (TFTs) are the main driving elements in current Liquid Crystal Displays (LCDs) and Active Matrix Organic electroluminescent displays (AMOLEDs), and are directly related to the display performance of flat panel displays.
Most of the existing liquid crystal displays in the market are backlight liquid crystal displays (lcds), which include a liquid crystal display panel and a backlight module (backlight module). The liquid crystal display panel operates on the principle that liquid crystal molecules are poured between a thin film Transistor Array (TFT Array Substrate) and a color filter (color filter, CF) Substrate, pixel voltage and common voltage are applied to the two substrates, and the rotation direction of the liquid crystal molecules is controlled by an electric field formed between the pixel voltage and the common voltage, so that light of a backlight module is transmitted out to generate a picture.
With the continuous pursuit of display quality, a high refresh rate (e.g. 120HZ) and high image quality (e.g. 8K) lcd is a development trend, and in order to reduce the risk of vertical crosstalk, a pixel driving circuit of 1G1D architecture is usually adopted, that is, the pixel driving circuit includes a plurality of sub-pixels arranged in an array, one scanning line corresponds to one row of sub-pixels, and one data line corresponds to two adjacent rows of sub-pixels, however, a high refresh rate and high image quality lcd panel inevitably causes load (loading) of a source driver, and in order to realize bright-dark alternation of the pixels in the adjacent rows, when a data signal transmitted to a data line by the source driver is frequently switched between a low gray scale voltage and a high gray scale voltage, a temperature of the source driver is too high due to a large voltage difference before and after switching, and the source driver is damaged, so that the device can not work normally; in addition, a large amount of current is consumed under a heavy-duty picture with alternating bright and dark, and power consumption is increased. Therefore, the prior art generally adds a heat sink to the lcd to solve the problem of excessive temperature of the source driver under heavy-duty images, but adding a heat sink will undoubtedly increase the cost.
Disclosure of Invention
The invention aims to provide a pixel driving method, which is used for converting a heavy-load picture into a light-load picture and solving the problem that a source electrode driver under the heavy-load picture has overhigh temperature.
To achieve the above object, the present invention provides a pixel driving method, comprising the steps of:
step S1, providing a pixel driving circuit, wherein the pixel driving circuit comprises a plurality of sub-pixels distributed in an array, a plurality of scanning lines extending along the horizontal direction and a plurality of data lines extending along the vertical direction; each scanning line is correspondingly connected with a row of sub-pixels, and each data line is correspondingly connected with a plurality of sub-pixels positioned in an odd row in one column of sub-pixels in two adjacent columns of sub-pixels and a plurality of sub-pixels positioned in an even row in the other column of sub-pixels;
step S2, obtaining a target brightness value of a sub-pixel at the ith row and the ith column of the jth row, and setting i and j as positive integers;
step S3, obtaining the brightness compensation value of the ith row and ith column sub-pixels;
step S4, judging whether the brightness compensation value of the ith row and ith column sub-pixels is larger than a preset threshold value; when the brightness compensation value is larger than a preset threshold value, outputting a compensated brightness value of the ith row and ith column of sub-pixels according to a target brightness value of the ith row and ith column of sub-pixels and the brightness compensation value; and when the brightness compensation value is smaller than or equal to a preset threshold value, outputting the brightness value of the ith column of the jth row.
In step S4, the display frame of the heavy loading frame is converted into the display frame of the light loading frame by outputting the compensated brightness value of the jth row and ith column sub-pixels.
The reloading picture is a picture in which the brightness values of the sub-pixels in the odd-numbered rows are all greater than or equal to a preset first brightness value, the brightness values of the sub-pixels in the even-numbered rows are all less than or equal to a preset second brightness value, and the first brightness value is greater than the second brightness value.
Each column of sub-pixels is a sub-pixel with the same color, and each row of sub-pixels comprises a plurality of red sub-pixels, a plurality of green sub-pixels and a plurality of blue sub-pixels which are sequentially arranged along the horizontal direction.
The total number of columns of the plurality of sub-pixels is 45; the total number of rows of the plurality of sub-pixels is 3.
In step S2, according to the target brightness value calculation formula:
obtaining a target brightness value of the sub-pixel of the ith column in the jth row, wherein
Is the target brightness value of the sub-pixel of the ith column in the jth row, Mj,iIs the luminance value of the sub-pixel of the ith column in the jth row, Mj+1,iIs the brightness value of the sub-pixel of the ith column in the j +1 th rowj,i+3Is the luminance value of the sub-pixel at the i +3 th column of the j rowj+1,i+3Is the luminance value of the sub-pixel at the (i + 3) th column of the (j + 1) th row.
In step S3, a formula is calculated according to the luminance compensation value:
obtaining a brightness compensation value of a sub-pixel in the ith row and the ith column, wherein delta is the brightness compensation value of the sub-pixel in the ith row and the ith column, and n is the total column number of the sub-pixels;
when j is an odd number, Δj,i＝|Mj,i-Mj+1,i+1|，Δj+1,i＝|Mj+1,i+1-Mj+2,iL, wherein Mj+1,i+1Is the luminance value of the sub-pixel at the (i + 1) th row and the (j + 1) th column, Mj+2,iThe luminance value of the ith column sub-pixel of the j +2 th row;
when j is an even number, Δj,i＝|Mj,i-Mj+1,i-1|，Δj+1,i＝|Mj+1,i-1-Mj+2,iL, wherein Mj+1,i-1Is row j +1The luminance value of the sub-pixel of the (i-1) th column.
In step S4, according to the compensated luminance value calculation formula:
obtaining the compensated brightness value of the sub-pixel of the ith column in the jth row, wherein NewMj,iAnd (4) the ratio is a compensation coefficient for the compensated brightness value of the ith sub-pixel in the jth row.
In step S3, when j is even number and i is 1, Mj+1,i-1By Mj+1,6Instead, wherein Mj+1,6Is the luminance value of the sub-pixel at the row j +1 and column 6.
The invention has the beneficial effects that: the pixel driving method of the invention judges whether the brightness compensation value is larger than a preset threshold value or not by obtaining the brightness compensation value of the sub-pixel at the ith row and the ith column of the jth row; when the brightness compensation value is less than or equal to the preset threshold value, the current display picture can be known not to be a heavy load picture, so that the brightness value of the jth row and ith column of sub-pixels can be directly output without compensating the brightness value, when the brightness compensation value is greater than the preset threshold value, the current display picture can be known to be the heavy load picture, the compensated brightness value of the jth row and ith column of sub-pixels can be output according to the target brightness value of the jth row and ith column of sub-pixels and the brightness compensation value, the heavy load picture is converted into a light load picture, and the problem that the temperature of a source electrode driver under the heavy load picture is overhigh is solved.
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For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.
In the drawings, there is shown in the drawings,
FIG. 1 is a flow chart of a pixel driving method according to the present invention;
fig. 2 is a schematic diagram of a pixel driving circuit of the pixel driving method of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Referring to fig. 1, the present invention provides a pixel driving method, including the following steps:
step S1, please refer to fig. 2, a pixel driving circuit is provided, which includes a plurality of sub-pixels 10 distributed in an array, a plurality of scan lines 20 extending along a horizontal direction, and a plurality of data lines 30 extending along a vertical direction; each scanning line 20 is correspondingly connected with a row of sub-pixels 10, and each data line 30 is correspondingly connected with a plurality of sub-pixels 10 positioned in an odd row in one column of sub-pixels 10 in two adjacent columns of sub-pixels 10 and a plurality of sub-pixels 10 positioned in an even row in the other column of sub-pixels 10;
step S2, obtaining a target brightness value of the sub-pixel 10 in the ith row and the ith column of the jth row, and setting i and j as positive integers;
step S3, obtaining the brightness compensation value of the sub-pixel 10 at the ith row and the ith column;
step S4, determining whether the luminance compensation value of the ith row and ith column sub-pixels 10 is greater than a preset threshold; when the brightness compensation value is larger than the preset threshold value, outputting the compensated brightness value of the ith row and ith column of sub-pixels 10 according to the target brightness value and the brightness compensation value of the ith row and ith column of sub-pixels 10; when the brightness compensation value is less than or equal to the preset threshold value, the brightness value of the sub-pixel 10 in the ith column of the jth row is output.
Specifically, in step S4, the display frame of the heavy-duty frame is converted into the display frame of the light-duty frame by outputting the compensated brightness value of the jth row and ith column sub-pixels 10.
Specifically, the reloaded picture is a picture in which the luminance values of the sub-pixels 10 in the odd-numbered rows are all greater than or equal to a preset first luminance value and the luminance values of the sub-pixels 10 in the even-numbered rows are all less than or equal to a preset second luminance value, and the first luminance value is greater than the second luminance value.
It should be noted that, in the present invention, by obtaining the luminance compensation value of the ith row and ith column of sub-pixels 10, it is determined whether the luminance compensation value is greater than a preset threshold value; when the brightness compensation value is less than or equal to the preset threshold value, it can be known that the current display picture is not a heavy-load picture, so that the brightness value of the jth row and ith column of sub-pixels 10 can be directly output without compensating the brightness value, when the brightness compensation value is greater than the preset threshold value, it can be known that the current display picture is a heavy-load picture, the brightness value compensated by the jth row and ith column of sub-pixels 10 is output according to the target brightness value and the brightness compensation value of the jth row and ith column of sub-pixels 10, so as to convert the heavy-load picture into a light-load picture, and the problem that the temperature of the source driver is too high under the heavy-load picture is solved.
Specifically, each row of sub-pixels 10 is a sub-pixel 10 with the same color, and each row of sub-pixels 10 includes a plurality of red sub-pixels R, a plurality of green sub-pixels G, and a plurality of blue sub-pixels B sequentially arranged along the horizontal direction. That is, the sub-pixels 10 are regularly and repeatedly arranged, wherein the sub-pixel 10 in the first row is a red sub-pixel R, the sub-pixel 10 in the second row is a green sub-pixel G, the sub-pixel 10 in the third row is a blue sub-pixel B, the sub-pixel 10 in the fourth row is a red sub-pixel R, the sub-pixel 10 in the fifth row is a green sub-pixel G, and the sub-pixel 10 in the sixth row is a blue sub-pixel B.
Specifically, in order to avoid interference of high-frequency display of characters and the like, on the premise of sufficiently saving cost, it is only required to obtain a brightness compensation value by taking 45 pixel units 40 in the horizontal direction through experiments, and each pixel unit 40 includes three subpixels, namely, 3 red subpixels R, three subpixels G, and three blue subpixels B, that is, the total number of columns of the subpixels 10 is 45, and the total number of rows of the subpixels 10 is 3.
Specifically, in step S2, according to the target brightness value calculation formula:
obtaining a target brightness value of the sub-pixel 10 at the jth row and ith column, wherein
Is line jTarget brightness value, M, of the i-th column of sub-pixels 10j,iIs the luminance value, M, of the sub-pixel 10 at the jth row and ith columnj+1,iIs the luminance value, M, of the sub-pixel 10 at the ith column of the j +1 th rowj,i+3Is the luminance value, M, of the sub-pixel 10 at the i +3 th column of the j rowj+1,i+3Is the luminance value of the sub-pixel 10 at the (j + 1) th row and the (i + 3) th column.
Specifically, in step S3, according to the luminance compensation value calculation formula:
obtaining a brightness compensation value of the sub-pixel 10 in the ith row and the ith column of the jth row, wherein Δ is the brightness compensation value of the sub-pixel 10 in the ith row and the ith column of the jth row, and n is the total column number of the sub-pixels 10;
when j is an odd number, Δj,i＝|Mj,i-Mj+1,i+1|，Δj+1,i＝|Mj+1,i+1-Mj+2,iL, wherein Mj+1,i+1Is the brightness value of the sub-pixel 10 at the j +1 th row and the i +1 th column, Mj+2,iThe luminance value of the ith column sub-pixel 10 in the j +2 th row;
when j is an even number, Δj,i＝|Mj,i-Mj+1,i-1|，Δj+1,i＝|Mj+1,i-1-Mj+2,iL, wherein Mj+1,i-1The luminance value of the sub-pixel 10 in the (j + 1) th row and the (i-1) th column;
specifically, in step S4, according to the compensated luminance value calculation formula:
obtaining the compensated brightness value of the sub-pixel 10 in the ith row and the ith column, wherein NewMj,iThe ratio is a compensation coefficient for the compensated luminance value of the jth row and ith column of sub-pixels 10.
In particular, the method comprises the following steps of,
is the average value of the luminance values of four sub-pixels 10 of the same color in two adjacent rows of sub-pixels 10.
Specifically, in step S3, when j is an even number and i is 1, Mj+1,i-1By Mj+1,6Instead, wherein Mj+1,6Is the luminance value of the sub-pixel 10 at the 6 th column of the j +1 th row.
In summary, the pixel driving method of the invention determines whether the luminance compensation value is greater than a preset threshold value by obtaining the luminance compensation value of the ith row and ith column of sub-pixels; when the brightness compensation value is less than or equal to the preset threshold value, the current display picture can be known not to be a heavy load picture, so that the brightness value of the jth row and ith column of sub-pixels can be directly output without compensating the brightness value, when the brightness compensation value is greater than the preset threshold value, the current display picture can be known to be the heavy load picture, the compensated brightness value of the jth row and ith column of sub-pixels can be output according to the target brightness value of the jth row and ith column of sub-pixels and the brightness compensation value, the heavy load picture is converted into a light load picture, and the problem that the temperature of a source electrode driver under the heavy load picture is overhigh is solved.
As described above, it will be apparent to those skilled in the art that other various changes and modifications may be made based on the technical solution and concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.
Claims (8)
1. A pixel driving method, comprising the steps of:
step S1, providing a pixel driving circuit, wherein the pixel driving circuit comprises a plurality of sub-pixels (10) distributed in an array, a plurality of scanning lines (20) extending along the horizontal direction and a plurality of data lines (30) extending along the vertical direction; each scanning line (20) is correspondingly connected with a row of sub-pixels (10), and each data line (30) is correspondingly connected with a plurality of sub-pixels (10) positioned in an odd row in one column of sub-pixels (10) in two adjacent columns of sub-pixels (10) and a plurality of sub-pixels (10) positioned in an even row in the other column of sub-pixels (10);
step S2, obtaining a target brightness value of the ith row and ith column of sub-pixels (10), and setting i and j as positive integers;
step S3, obtaining the brightness compensation value of the sub-pixel (10) of the ith row and the ith column;
step S4, judging whether the brightness compensation value of the ith row and ith column sub-pixel (10) is larger than a preset threshold value; when the brightness compensation value is larger than a preset threshold value, outputting a compensated brightness value of the ith row and ith column of sub-pixels (10) according to a target brightness value and the brightness compensation value of the ith row and ith column of sub-pixels (10); when the brightness compensation value is smaller than or equal to a preset threshold value, outputting the brightness value of the sub-pixel (10) in the ith row and the ith column;
in the step S4, the display frame of the heavy-load frame is converted into the display frame of the light-load frame by outputting the compensated brightness value of the jth row and ith column sub-pixel (10).
2. The pixel driving method according to claim 1, wherein the reloaded frame is a frame in which the luminance values of the sub-pixels (10) in odd-numbered rows are all greater than or equal to a predetermined first luminance value and the luminance values of the sub-pixels (10) in even-numbered rows are all less than or equal to a predetermined second luminance value, and the first luminance value is greater than the second luminance value.
3. The pixel driving method according to claim 1, wherein each column of sub-pixels (10) is a same color sub-pixel (10), and each row of sub-pixels (10) comprises a plurality of red sub-pixels (R), a plurality of green sub-pixels (G), and a plurality of blue sub-pixels (B) sequentially arranged along a horizontal direction.
4. A pixel driving method according to claim 1, wherein the total number of columns of the plurality of sub-pixels (10) is 45; the total number of rows of the plurality of sub-pixels (10) is 3.
5. The pixel driving method according to claim 1, wherein in the step S2, according to a target luminance value calculation formula:
obtaining a target brightness value of the sub-pixel (10) of the ith row and ith column, wherein
Is the object of the sub-pixel (10) of the jth row and ith columnValue of standard luminance, Mj,iIs the brightness value of the sub-pixel (10) at the jth row and ith columnj+1,iIs the brightness value of the sub-pixel (10) at the ith column of the j +1 th rowj,i+3Is the luminance value of the sub-pixel (10) at the i +3 th column of the j rowj+1,i+3Is the luminance value of the sub-pixel (10) at the (j + 1) th row and the (i + 3) th column.
6. The pixel driving method according to claim 5, wherein in the step S3, according to the luminance compensation value calculation formula:
obtaining a brightness compensation value of a sub-pixel (10) in the ith column of the jth row, wherein delta is the brightness compensation value of the sub-pixel (10) in the ith column of the jth row, and n is the total column number of the sub-pixels (10);
when j is an odd number, Δj,i＝|Mj,i-Mj+1,i+1|，Δj+1,i＝|Mj+1,i+1-Mj+2,iL, wherein Mj+1,i+1Is the brightness value of the sub-pixel (10) at the j +1 th row and the i +1 th column, Mj+2,iThe luminance value of the ith column sub-pixel (10) of the j +2 th row;
when j is an even number, Δj,i＝|Mj,i-Mj+1,i-1|，Δj+1,i＝|Mj+1,i-1-Mj+2,iL, wherein Mj+1,i-1Is the luminance value of the sub-pixel (10) of the (j + 1) th row and the (i-1) th column.
7. The pixel driving method according to claim 5,
the average value of the brightness values of four sub-pixels (10) with the same color in two adjacent rows of sub-pixels (10) is obtained.
8. The pixel driving method according to claim 6, wherein in step S3, when j is even and i is 1, M isj+1,i-1By Mj+1,6Instead, wherein Mj+1,6Is the brightness of the sub-pixel (10) of the 6 th column of the j +1 th rowThe value is obtained.
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| CN106782421B (en) * | 2017-03-10 | 2019-08-13 | 深圳市华星光电技术有限公司 | Image element driving method and device |
| CN106847157B (en) * | 2017-03-24 | 2020-01-21 | 上海天马有机发光显示技术有限公司 | Brightness compensation method and device of display panel |
| CN107731194A (en) * | 2017-11-21 | 2018-02-23 | 深圳市华星光电半导体显示技术有限公司 | A kind of mura compensation methodes and device |
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2018
- 2018-11-30 CN CN201811459035.6A patent/CN109360534B/en active Active
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2019
- 2019-01-07 WO PCT/CN2019/070718 patent/WO2020107656A1/en active Application Filing
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| WO2020107656A1 (en) | 2020-06-04 |
| CN109360534A (en) | 2019-02-19 |
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