TWI557720B - Display driver and display apparatus - Google Patents

Description

Display driver and display device

The present invention relates to an electronic device and a driver for an electronic device, and more particularly to a display device and a display driver.

With the rapid development of display technology, the current market performance requirements for display panels are toward high resolution, high brightness and low power consumption. However, as the resolution of the display panel increases, in order to display high resolution, the number of sub-pixels thereon also increases, thereby increasing the manufacturing cost of the display panel. In order to reduce the manufacturing cost of the display panel, a sub-pixel rendering method (SPR method) has emerged. The display device uses a different sub-pixel arrangement and design to develop a suitable algorithm, so that the resolution at the time of displaying the image can be improved to the sub-pixel resolution. Since the size of the sub-pixel is smaller than the pixel, the human eye can see that the resolution (ie, the visual resolution) of the image is improved. In addition, from the perspective of low power consumption, the display device can also operate in a low power mode of operation depending on the needs of the actual application. In the low power mode of operation, the display device will provide a better user experience if it continues to provide good display quality.

The invention provides a display driver and a display device, which can achieve both display quality and energy saving.

A display driver of the present invention is used to drive a display panel. The display panel is configured to display an image frame in a first display mode or a second display mode. The display driver includes a first display drive channel and a second display drive channel. The first display driving channel is in a first display mode, and uses a sub-pixel imaging method to drive the display panel to display an image frame. The second display driving channel is in a second display mode, and the sub-pixel imaging method is used to drive the display panel to display the image frame. The display panel includes a sub-pixel repeating unit. The sub-pixel repeating units are repeatedly arranged to form a display panel. The sub-pixel repetition unit includes a plurality of pixel units. Each pixel unit includes one to two sub-pixels. In the second display mode, the second display driving channel uses a plurality of gamma voltages to drive the corresponding gray scale values of the sub-pixel display on the display panel. The voltage value of at least one of the gamma voltages is determined according to the arrangement of the sub-pixels on the display panel.

A display device of the present invention includes a display panel and a display driver. The display panel includes a sub-pixel repeating unit. The sub-pixel repeating units are repeatedly arranged to form a display panel. The sub-pixel repetition unit includes a plurality of pixel units. Each pixel unit includes one to two sub-pixels. The display panel is configured to display an image frame in a first display mode or a second display mode. The display driver is coupled to the display panel. The display driver includes a first display driving channel and a second display driving channel for driving the display panel to display the image frame by using a sub-pixel imaging method. In the second display In the display mode, the second display driving channel uses a plurality of gamma voltages to drive the corresponding grayscale value of the sub-pixel display on the display panel. The voltage value of at least one of the gamma voltages is determined according to the arrangement of the sub-pixels on the display panel.

In an embodiment of the invention, in the display panel, each pixel unit includes at least one of a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel. The voltage value of at least one of the gamma voltages is determined according to at least one proportional relationship. At least one proportional relationship is based on at least one of the first color subpixel, the second color subpixel, and the third color subpixel in the subpixel repeat unit, based on the pixel unit, in a A first quantity ratio occupies in one direction and a second quantity ratio occupies in a second direction are determined.

In an embodiment of the invention, in the display panel, the pixel unit includes a first pixel unit and a second pixel unit. The first color subpixel and the second color subpixel are adjacently arranged to form a first pixel unit. The third color subpixel and the second color subpixel are adjacently arranged to form a second pixel unit.

In an embodiment of the invention, in the display panel, the pixel unit includes a first pixel unit, a second pixel unit, and a third pixel unit. The first color subpixel and the second color subpixel are adjacently arranged to form a first pixel unit. The third color subpixel and the second color subpixel are adjacently arranged to form a second pixel unit. The first color subpixel and the third color subpixel are adjacently arranged to form a third pixel unit.

In an embodiment of the invention, in the display panel, the first color The sub-pixel, the second color sub-pixel, and the third color sub-pixel are adjacently arranged to form two pixel units among the pixel units.

In an embodiment of the invention, in the above display panel, each pixel unit includes a single sub-pixel. A single sub-pixel includes a first color sub-pixel, a second color sub-pixel, or a third color sub-pixel.

In an embodiment of the invention, in the display panel, the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are respectively a red sub-pixel, a green sub-pixel, and a blue sub-pixel. Picture.

In an embodiment of the invention, the sub-pixel includes a target driver sub-pixel. In the second display mode, the second display driving channel determines whether to use the determined at least one gamma voltage to drive the target driver according to a boundary relationship between the target driving sub-pixel and the plurality of sub-pixels adjacent thereto Picture.

In an embodiment of the invention, the second display driving channel determines the boundary relationship according to the most significant bit of the sub-pixel data of the write target driving sub-pixel and the sub-pixel adjacent thereto.

In an embodiment of the invention, the second display driving channel includes a data processing unit and a voltage output unit. The data processing unit is configured to determine the boundary relationship according to the most significant bit of the sub-pixel data of the write target driving sub-pixel and the sub-pixel adjacent thereto. The voltage output unit is coupled to the data processing unit. The voltage output unit is configured to determine whether to use the determined at least one gamma voltage to drive the target driving sub-pixel according to a boundary relationship between the target driving sub-pixel and the plurality of sub-pixels adjacent thereto.

In an embodiment of the invention, the gamma voltage includes a first gamma voltage, a second gamma voltage, and a third gamma voltage. The voltage value of the third gamma voltage is determined according to the arrangement of the sub-pixels on the display panel. The voltage value of the first gamma voltage is less than the voltage value of the second gamma voltage. The voltage value of the third gamma voltage is interposed between the voltage values of the first gamma voltage and the second gamma voltage.

In an embodiment of the invention, the gamma voltage further includes a fourth gamma voltage. The voltage value of the fourth gamma voltage is further determined according to the arrangement of the sub-pixels on the display panel. The voltage value of the fourth gamma voltage is interposed between the voltage values of the first gamma voltage and the third gamma voltage.

In an embodiment of the invention, in the first display mode, the first display driving channel drives the display panel by using the first gamma voltage and the second gamma voltage.

In an embodiment of the invention, the display driver further includes a selection unit. The selecting unit selects to drive the display panel to display the image frame in the first display mode or the second display mode by using the first display driving channel or the second display driving channel according to a selection signal.

Based on the above, in the exemplary embodiment of the present invention, the display driver drives the sub-pixel display corresponding gray scale value by using the gamma voltage determined according to the arrangement manner of the sub-pixels on the display panel in the second display mode. Both display quality and energy saving.

The above described features and advantages of the invention will be apparent from the following description.

100‧‧‧ display device

110‧‧‧ display driver

112‧‧‧First display drive channel

114‧‧‧Second display drive channel

116‧‧‧Selection unit

120, 420, 520, 620, 720‧‧‧ display panels

210‧‧‧First voltage converter

220‧‧‧Boundary Detection Circuit

230‧‧‧pixel filter circuit

240‧‧‧Second voltage converter

310‧‧‧ Data Processing Unit

320‧‧‧Voltage output unit

422R, 422B, 522R, 522B, 522G, 622R, 622B, 722R, 722B, 722G‧‧‧ pixel units

430, 530, 630, 730‧‧ ‧ subpixel repeating unit

622‧‧‧Subpixel combination

P11, P12, P13, P14, P44‧‧‧ pixel data

S1‧‧‧ Display information

S2, S3‧‧‧ drive signals

SEL‧‧‧Select signal

SP_G‧‧‧Green sub-pixel

SP_R‧‧‧Red sub-pixel

SP_B‧‧‧Blue sub-pixel

WP‧‧‧ pixel width

2WP‧‧‧2x pixel width

X, Y‧‧‧ coordinates direction

S900, S910, S920, S930, S940, S950, S960, S970‧‧‧ steps of the display driving method

FIG. 1 is a schematic diagram of a display device according to an embodiment of the invention.

2 is a schematic diagram showing the internal circuit block of the display driver of the embodiment of FIG. 1.

3, 7, 11, and 15 are schematic diagrams showing partial pixel data of different embodiments of the present invention.

4, 8, 12, and 16 are schematic diagrams showing partial sub-pixels on a display panel according to different embodiments of the present invention.

5, 9, 13, and 17 are schematic diagrams showing sub-pixel repeating units of different embodiments of the present invention.

6, FIG. 10, FIG. 14, and FIG. 18 are schematic diagrams showing a sub-pixel combination for displaying white dots according to different embodiments of the present invention.

FIG. 19 is a flow chart showing the steps of a display driving method according to an embodiment of the invention.

FIG. 1 is a schematic diagram of a display device according to an embodiment of the invention. 2 is a schematic diagram showing the internal circuit block of the display driver of the embodiment of FIG. 1. Referring to FIG. 1 and FIG. 2 , the display device 100 of the embodiment includes a display driver 110 and a display panel 120 . The display driver 110 is coupled to the display panel 120. The display driver 110 is configured to receive a display material S1, and output a driving signal S2 or S3 to the display panel 120 after performing data processing on the display material S1 to utilize a sub-pixel imaging method. The display panel 120 is configured to display an image frame in a first display mode or a second display mode. In this embodiment, the second display mode is, for example, a low-power mode in an energy-saving power-saving application. In contrast, the first display mode is, for example, a normal mode of the non-low power operation mode.

Specifically, in the embodiment, the display driver 110 includes a first display driving channel 112, a second display driving channel 114, and a selection unit 116. The selecting unit 116 is configured to select the first display driving channel 112 or the second display driving channel 114 according to a selection signal SEL to perform data processing on the display material S1. The first display driving channel 112 and the second display driving channel 114 respectively output driving signals S2 and S3 to cause the display driver 110 to drive the display panel 120 to display an image frame in the first display mode or the second display mode.

In the present embodiment, the selection signal SEL is, for example, selected to turn on the signal transmission path connected to the second display driving channel 114 when the display device 100 has a requirement to enter the low power operation mode, so that the display driver 110 utilizes the second display driving. Channel 114 drives display panel 120. In this embodiment, the display device 100 enters a low-power operation mode, including but not limited to, the display device 100 is in a standby state because it does not need to display a complete image frame for a long time, or the user needs according to actual operation requirements. The display device 100 is self-set to enter a low power mode of operation, or the power device for supplying the display device 100 may be used for power, or other conditions that may require entry into a low power mode of operation. In at least the above three cases, the display device 100 is likely to enter the low power operation mode, and the display driver 110 uses the second display drive channel 114 to drive the display panel 120.

In the embodiment, the first display driving channel 112 uses the sub-pixel imaging method to drive the display panel 120 to display an image frame in the first display mode. Specifically, the first display driving channel 112 of the embodiment includes a first voltage converter 210, an edge detection circuit 220, a pixel filtering circuit 230, and a second voltage conversion. 240. In the first display mode, the first voltage converter 210 performs a gamma-to-linear conversion on the non-linear gamma image signal of the display data S1 to convert the nonlinear gamma image signal into a linear signal. . Then, the boundary detection circuit 220 performs boundary detection on the image frame information included in the linear signal. Then, the pixel filter circuit 230 performs a filtering operation on the boundary information of the image frame to improve the quality of the image frame to be displayed. Then, the second voltage converter 240 performs a linear-to-gamma conversion on the linear signal after the filtering operation to convert the linear signal into a nonlinear gamma voltage, thereby being in the first display mode. The drive signal S2 is output to drive the display panel 120.

Therefore, in the first display mode, the first display driving channel 112 drives the display panel 120, for example, using a plurality of preset gamma voltages. For example, in an embodiment, the first display driving channel 112 drives the plurality of sub-pixels on the display panel 120 by using gamma voltages V0, V255 and other preset gamma voltages in the first display mode, for example. Displays the corresponding grayscale value.

In the embodiment, the second display driving channel 114 drives the display panel 120 to display the image frame by using the sub-pixel imaging method in the second display mode. Specifically, the second display driving channel 114 of the embodiment includes a data processing unit 310. And a voltage output unit 320. The voltage output unit 320 is coupled to the data processing unit 310. In the second display mode, the voltage output unit 320 drives the display panel 120 with a plurality of gamma voltages. In this embodiment, the voltage value of at least one of the gamma voltages for driving the display panel 120 is determined according to the arrangement of the sub-pixels on the display panel 120. For example, in the present embodiment, the arrangement of sub-pixels can be evaluated, for example, by at least one proportional relationship related to the arrangement of sub-pixels. The proportional relationship is determined, for example, according to the arrangement of sub-pixels of different colors on different directions on the display panel 120. Therefore, in the present embodiment, the voltage value of at least one of the gamma voltages for driving the display panel 120 can be determined, for example, according to the proportional relationship.

For example, in an embodiment, the voltage output unit 320 drives the plurality of sub-pixels on the display panel 120 to display corresponding grayscale values, for example, by using the gamma voltages V0, V186, and V255 in the second display mode. In this example, the gamma voltage V186 is determined, for example, according to the arrangement of sub-pixels on the display panel 120, and the determined gamma voltage V186 is interposed between the gamma voltages V0 and V255. That is to say, the gamma voltage V186 is used as the intermediate voltage between the two, which is determined by the proportional relationship of the panel sub-pixels, and is used to provide the sub-pixel arrangement to complement the color on the edge. In another embodiment, the voltage output unit 320 drives the plurality of sub-pixels on the display panel 120 to display corresponding grayscale values, for example, by using the gamma voltages V0, V155, V212, and V255 in the second display mode. In this example, the gamma voltages V155 and V212 are determined, for example, according to the arrangement of sub-pixels on the display panel 120, and the determined gamma voltages V155 and V212 are interposed between the gamma voltages V0 and V255. In this embodiment, the phase Compared with the second display mode, in the first display mode, the gamma voltages V0, V255 and other preset gamma voltages for driving the display panel 120 are predetermined, and are not based on the display panel 120 and the sub-pictures. The proportional relationship related to the arrangement of the elements is adjusted. That is, the gamma voltages V0, V255 determine the minimum grayscale value and the maximum grayscale value of the display panel 120.

It should be noted that although the present embodiment is exemplified in that the display driver 110 includes two display driving channels, the present invention is not limited thereto. In an embodiment, the driving function of the second display driving channel 114 can also be implemented by integrating into any one of the first display driving channels 112. Alternatively, in an embodiment, the driving function of the second display driving channel 114 can also be implemented by adding a circuit block to the first display driving channel 112.

Several embodiments are set forth below to illustrate the manner in which the second display drive channel 114 determines the gamma voltage, although the invention is not limited to the various embodiments illustrated. Further combinations are also allowed between the embodiments.

FIG. 3 is a schematic diagram showing partial pixel data according to an embodiment of the present invention. 4 is a schematic diagram showing a portion of a sub-pixel on a display panel according to an embodiment of the invention. FIG. 5 is a schematic diagram showing a sub-pixel repeating unit according to an embodiment of the present invention.

Referring to FIG. 1 to FIG. 5, in the embodiment, FIG. 3 is, for example, the display data S1 input to the display driver 110 in FIG. 1, which includes multi-pixel data P11 to P44 for writing respectively. The plurality of pixel units 422R, 422B are displayed on the display panel 420. In this embodiment, the pixel data P11 to P44 respectively include the first color sub-pixel data, the second color sub-pixel data, and the third color sub-pixel data. Further, in the present embodiment, although FIG. 3 is exemplified by only the 16-pixel data P11 to P44, the number thereof is not intended to limit the present invention. In the present embodiment, the display panel 420 includes a plurality of pixel units 422R, 422B, and each of the pixel units 422R, 422B includes two sub-pixels. The two sub-pixels are, for example, sub-pixels of two colors selected from the group consisting of a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel. For example, in this embodiment, the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are, for example, a red sub-pixel, a green sub-pixel, and a blue sub-pixel, respectively. The invention is not limited. In an embodiment, the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel may be a combination of white sub-pixels and other different color sub-pixels. In the present embodiment, the pixel unit 422R includes, for example, a red sub-pixel and a green sub-pixel, and the pixel unit 422B includes, for example, a blue sub-pixel and a green sub-pixel. Two pixel units 422R, 422B including different color sub-pixels are staggered in different directions of the display panel 420 to form a sub-pixel array. In this embodiment, the pixel units 422R, 422B respectively include two sub-pixels.

In the present embodiment, the display driver 110 writes, for example, the pixel data P11 into the pixel unit 422R, which also has a pixel width WP in the X direction and the Y direction. In the present embodiment, since the pixel unit 422R includes only the red sub-pixel and the green sub-pixel, the display driver 110 drives the display panel 420 to display the image frame by using the sub-pixel imaging method. In the sub-pixel imaging method, in order to display the pixel data P11 having red, blue, and green colors, the pixel unit 422R including only the red sub-pixel and the green sub-pixel will cooperate with at least the pixel unit adjacent thereto. 422B jointly displays the pixel data P11 to compensate for the blue sub-pictures that are missing by itself. Prime. Similarly, in the sub-pixel imaging method, in order to display the pixel data P12 having red, blue, and green colors, the pixel unit 422B including only the blue sub-pixel and the green sub-pixel is at least adjacent to the left and right sides thereof. The pixel unit 422R collectively displays the pixel data P12 to compensate for the red sub-pixels that are missing by itself. Such a method of displaying the same pixel data by using adjacent pixel units in cooperation may be referred to as a sub-pixel imaging method, but the present invention is not limited thereto. In other embodiments, there are other possibilities for the display driver 110 to use the sub-pixel imaging method to drive the display panel 420 to display an image frame.

Referring to FIG. 5, in the embodiment, a part of the sub-pixels of the display panel 420 are arranged in an array to form the sub-pixel repeating unit 430 of FIG. 5. The sub-pixel repetition unit 430 is repeatedly arranged to form a sub-pixel array of the display panel 420. In the present embodiment, the sub-pixel repetition unit 430 is, for example, a 4×4 pixel array formed by arranging a plurality of pixel units 422R and 422B. In the present embodiment, in addition to the gamma voltages V0, V255, the voltage output unit 320 drives the sub-pixels on the display panel 420, for example, by using a gamma voltage V186 in the second display mode. In the present embodiment, the gamma voltage V186 is determined, for example, according to at least one proportional relationship. This proportional relationship is based on the pixel elements 422R, 422B in the sub-pixel repetition unit 430, based on the pixel unit, a first quantity ratio (horizontal sub-pixel ratio) occupied in the X direction and in the Y direction. The second quantity ratio (the vertical sub-pixel ratio) of the possession is determined. For example, taking the red sub-pixel as an example, in the first column of the sub-pixel repetition unit 430, the pixel unit 422R occupies the same row in the X direction in terms of the number ratio. A quantity ratio is 1/2. In other words, based on the pixel unit, at the first Among the four pixel units 422R, 422B of the column, the pixel unit 422R having the red sub-pixels occupies two in number, and thus the first number ratio is 1/2. Each pixel column in the Y direction includes a pixel unit 422R, and therefore, the second number ratio of the pixel unit 422R in the Y direction is 1/1 in terms of the number ratio. That is to say, in the sub-pixel repetition unit 430, each column includes the pixel unit 422R having the red sub-pixel on the basis of the pixel unit, and thus the second number ratio is 1/1. Therefore, the proportional relationship determined according to the red sub-pixel is (1/2) / (1/1) = 1/2. Similarly, taking the blue sub-pixel as an example, in the sub-pixel repeating unit 430, the first number ratio of the pixel units 422B occupying the same column in the X direction is 1/2. Each pixel column in the Y direction includes a pixel unit 422B, and therefore, the second number ratio of the pixel unit 422B in the Y direction is 1/1. Therefore, the proportional relationship determined according to the blue sub-pixel is (1/2) / (1/1) = 1/2. Further, taking the green sub-pixel as an example, in the sub-pixel repeating unit 430, since the pixel units 422B and 422R all include the green sub-pixel, the pixel units 422B and 422R occupy the same column in the X direction. The first quantity ratio is 1/1, and the second quantity ratio occupied in the same line in the Y direction is 1/1. Therefore, the proportional relationship determined according to the green sub-pixel is (1/1)/(1/1)=1/1. In the present embodiment, the gamma voltage V186 is determined, for example, according to a proportional relationship of 1/2 with a preset gamma voltage curve, and is used to drive red and blue sub-pixels on the display panel 420.

After the voltage value of the gamma voltage V186 is determined according to the arrangement of the sub-pixels on the display panel 420, the voltage output unit 320 determines the boundary relationship between the target driving sub-pixel and the plurality of sub-pixels adjacent thereto. Whether to use the decision The gamma voltage V186 drives the target drive sub-pixel. For example, in the present embodiment, assuming that the target driver sub-pixel is the blue sub-pixel of the pixel unit 422B in FIG. 4, the data processing unit 310 drives the sub-pixel and the adjacent sub-pixel according to the write target. The most significant bit of the sub-pixel data of the pixel determines the boundary relationship between these sub-pixels. Taking the blue sub-pixel data of the pixel data P11, P12, and P13 as an example, the data processing unit 310 fetches the most significant bit of the blue sub-pixel data to determine the blue sub-pixel. The boundary relationship between. It is assumed that the sequence of the most significant bits of the blue sub-pixel data captured by the data processing unit 310 is sequentially 010. In this example, the voltage output unit 320 determines that the gamma voltage V186 is used to drive the pixel unit 422B. Blue sub-pixels. In addition, in this embodiment, it is assumed that the sequence of the most significant bit of the blue sub-pixel data captured by the data processing unit 310 is 011, 100 or 101, and the voltage output unit 320 also determines to use the gamma voltage V186. The blue sub-pixel of the pixel unit 422B is driven. In this embodiment, if the sequence of the most significant bit of the blue sub-pixel data is 000, 001, 110 or 111, the voltage output unit 320 drives the blue of the pixel unit 422B, for example, by the gamma voltage V0 or V255. The dice picture. Similarly, in the embodiment, if the target driver subpixel is the red subpixel of the pixel unit 422R, whether the voltage output unit 320 is driven by the gamma voltage V186 can also be determined by using the above determination method. Let me repeat. Further, in the present embodiment, the green sub-pixel is driven by, for example, a gamma voltage V0 or V255.

Therefore, in this embodiment, the voltage output unit 320 can have a built-in look-up table in which the correspondence between the sequence of the most significant bits and the gamma voltage is listed. The voltage output unit 320 can determine the boundary at which the boundary is based on the truth table. Which gamma voltage needs to be output to drive the sub-pixels.

FIG. 6 is a schematic diagram showing a sub-pixel combination for displaying white dots according to an embodiment of the invention. In the present embodiment, the display panel 420 displays a white dot by, for example, a sub-pixel combination including a red sub-pixel SP_R, a green sub-pixel SP_G, and a blue sub-pixel SP_B. In FIG. 6, the red sub-pixel SP_R is denoted as R186 indicating that the red sub-pixel SP_R is driven by the gamma voltage V186 and is displayed in red. The green sub-pixel SP_G is denoted as G255, indicating that the green sub-pixel SP_G is driven by the gamma voltage V255 and is displayed in green. The blue sub-pixel SP_B is denoted as B186 indicating that the blue sub-pixel SP_B is driven by the gamma voltage V186 and displays blue. The red sub-pixel SP_R, the green sub-pixel SP_G, and the blue sub-pixel SP_B operate in cooperation in the second display mode to display a white point.

FIG. 7 is a schematic diagram showing partial pixel data according to another embodiment of the present invention. FIG. 8 is a schematic diagram of a portion of a sub-pixel on a display panel according to another embodiment of the present invention. FIG. 9 is a schematic diagram showing a sub-pixel repeating unit according to another embodiment of the present invention. Referring to FIG. 7 to FIG. 9, the display panel 520 of this embodiment is similar to the display panel 420 of the embodiment of FIG. 4, but the main difference between the two is, for example, the arrangement of sub-pixels on the display panel 520, and the sub-pictures. The constituent elements of the repeating unit 530.

Specifically, in the present embodiment, the display panel 520 includes a plurality of pixel units 522R, 522G, and 522B, and each of the pixel units 522R, 522G, and 522B includes two sub-pixels. For example, in the embodiment, the pixel unit 522R includes, for example, a red sub-pixel, a green sub-pixel, and the pixel unit 522B includes, for example, a blue sub-pixel, a red sub-pixel, and the pixel unit 522G includes, for example, green. Sub-pixel, blue sub-paint Prime. Three pixel units 522R, 522G, 522B including different color sub-pixels are staggered in different directions of the display panel 520 to form a sub-pixel array. In the present embodiment, the pixel units 522R, 522G, and 522B respectively include two sub-pixels.

In this embodiment, a portion of the sub-pixels of the display panel 520 are arranged in an array to form the sub-pixel repeating unit 530 of FIG. The sub-pixel repeating unit 530 is repeatedly arranged to form a sub-pixel array of the display panel 520. In the present embodiment, the sub-pixel repetition unit 530 is, for example, a 3×4 pixel array formed by arranging a plurality of pixel units 522R, 522G, and 522B. In the present embodiment, in addition to the gamma voltages V0, V255, the voltage output unit 320 drives the sub-pixels on the display panel 520, for example, by using a gamma voltage V212 in the second display mode. In the present embodiment, the gamma voltage V212 is, for example, a ratio of the first quantity occupied in the X direction (horizontal sub-pixel ratio) and Y in the sub-pixel repetition unit 530 according to the pixel units 522R, 522G, 522B. The second quantity ratio (vertical sub-pixel ratio) occupied in the direction is determined. For example, taking the red sub-pixel as an example, in the first column of the sub-pixel repetition unit 530, the pixel units 522R, 522B all include red sub-pixels, and in terms of the ratio, the two are in the X direction. The first number of ratios in the same column above is 2/3. That is to say, based on the pixel unit, among the three pixel units 522R, 522G, and 522B in the first column, the pixel units 522R and 522B having the red sub-pixels occupy two in number, and thus A quantity ratio is 2/3. Each of the columns in the Y direction includes pixel units 522R and 522B having red sub-pixels. Therefore, the ratio of the pixel units 522R and 522B occupying in the Y direction is 1/1 in terms of the number ratio. That is, based on the pixel unit, in the sub-pixel repeating unit 530, each column includes red The pixel elements 522R, 522B of the sub-pixels are therefore 1/1. Therefore, the proportional relationship determined by the red sub-pixel is (2/3)/(1/1)=2/3. Similarly, the proportional relationship determined by the blue sub-pixels and the green sub-pixels is also 2/3. In the present embodiment, the gamma voltage V212 is determined, for example, according to a proportional relationship of 2/3 with a preset gamma voltage curve, and is used to drive sub-pixels of red, green, and blue on the display panel 520.

In the present embodiment, in addition to the gamma voltages V0, V212, V255, the voltage output unit 320 drives the sub-pixels on the display panel 520, for example, by a gamma voltage V155 in the second display mode. In the present embodiment, the voltage value of the gamma voltage V155 is interposed between the gamma voltages V0, V212. In detail, after the gamma voltage V212 is determined according to the proportional relationship of 2/3 with the preset gamma voltage curve, the ratio of 2/3 is divided by 2 to obtain a proportional relationship of 1/3. The gamma voltage V155 is determined, for example, according to a proportional relationship of 1/3 with a preset gamma voltage curve, and is used to drive sub-pixels of red, green, and blue on the display panel 520. In other words, the gamma voltage V155 is also determined according to the arrangement of the sub-pixels on the display panel 520.

After the voltage values of the gamma voltages V155 and V212 are determined according to the arrangement of the sub-pixels on the display panel 520, the voltage output unit 320 according to the boundary between the target driving sub-pixel and the plurality of sub-pixels adjacent thereto It is judged whether or not the target gamma voltage V155 or V212 is used to drive the target driving sub-pixel. For example, in the present embodiment, assuming that the target driver subpixel is the blue subpixel of the pixel unit 522B in FIG. 8, the data processing unit 310 drives the subpixels according to the write target. The most significant bit of the sub-pixel data of the neighboring sub-pixels is used to determine the boundary relationship between the sub-pixels. Taking the blue sub-pixel data of the pixel data P11, P12, and P13 as an example, the data processing unit 310 extracts the most significant bit of the blue sub-pixel data to determine the blue sub-pixel. Border relationship. It is assumed that the sequence of the most significant bits of the blue sub-pixel data captured by the data processing unit 310 is sequentially 010. In this example, the voltage output unit 320 determines that the gamma voltage V212 is used to drive the pixel unit 522B. Blue sub-pixels. It is assumed that the sequence of the most significant bits of the blue sub-pixel data retrieved by the data processing unit 310 is 100 or 101. In this example, the voltage output unit 320 determines that the gamma voltage V155 is used to drive the pixel unit 522B. Blue sub-pixels.

In addition, in this embodiment, it is assumed that the target driver sub-pixel is the red sub-pixel of the pixel unit 522B in FIG. 8, and the data processing unit 310 captures the red sub-pixel data of the pixel data P11, P12, and P13. The most significant bit to determine the boundary between the red sub-pixels. It is assumed that the sequence of the most significant bit of the red sub-pixel data captured by the data processing unit 310 is 010 or 110. In this example, the voltage output unit 320 determines that the gamma voltage V212 is used to drive the red color of the pixel unit 522B. Sub-pixel. It is assumed that the sequence of the most significant bit of the red sub-pixel data captured by the data processing unit 310 is 001 or 101. In this example, the voltage output unit 320 determines that the gamma voltage V155 is used to drive the red color of the pixel unit 522B. Sub-pixel.

Similarly, in the present embodiment, if the target driver subpixel is the green subpixel of the pixel unit 522G, whether the voltage output unit 320 is driven by the gamma voltage V155 or V212 can also be determined by the above determination method. For example, suppose The most significant bit of the green sub-pixel data captured by the material processing unit 310 is sequentially 010. In this example, the voltage output unit 320 determines that the green sub-pixel of the pixel unit 522G is driven by the gamma voltage V212. . It is assumed that the sequence of the most significant bit of the green sub-pixel data captured by the data processing unit 310 is 100 or 101. In this example, the voltage output unit 320 determines that the gamma voltage V155 is used to drive the green of the pixel unit 522G. Sub-pixel. Further, in the present embodiment, if the target driving sub-pixel is the blue sub-pixel of the pixel unit 522G, whether or not the voltage output unit 320 is driven by the gamma voltage V155 or V212 can also be determined by the above-described determination method. For example, assume that the sequence of the most significant bit of the blue sub-pixel data captured by the data processing unit 310 is 010 or 110. In this example, the voltage output unit 320 determines that the gamma voltage V212 is used to drive the picture. The blue sub-pixel of element unit 522G. It is assumed that the sequence of the most significant bit of the blue sub-pixel data captured by the data processing unit 310 is 001 or 101. In this example, the voltage output unit 320 determines that the gamma voltage V155 is used to drive the pixel unit 522G. Blue sub-pixels.

Similarly, in the present embodiment, if the target driver subpixel is the red subpixel of the pixel unit 522R, whether the voltage output unit 320 is driven by the gamma voltage V155 or V212 can also be determined by the above determination method. For example, it is assumed that the most significant bit of the red sub-pixel data captured by the data processing unit 310 is sequentially 010. In this example, the voltage output unit 320 determines to use the gamma voltage V212 to drive the pixel unit 522R. Red sub-pixels. It is assumed that the sequence of the most significant bits of the red sub-pixel data captured by the data processing unit 310 is 100 or 101. In this example, the voltage output unit 320 determines that the gamma voltage V155 is used to drive the pixel unit. Red sub-pixel of 522R. Further, in the present embodiment, if the target driving sub-pixel is the green sub-pixel of the pixel unit 522R, whether or not the voltage output unit 320 is driven by the gamma voltage V155 or V212 can also be determined by the above-described determination method. For example, assume that the sequence of the most significant bit of the green sub-pixel data captured by the data processing unit 310 is 010 or 110. In this example, the voltage output unit 320 determines to use the gamma voltage V212 to drive the pixel. The green sub-pixel of unit 522R. It is assumed that the sequence of the most significant bit of the green sub-pixel data captured by the data processing unit 310 is 001 or 101. In this example, the voltage output unit 320 determines that the gamma voltage V155 is used to drive the green of the pixel unit 522R. Sub-pixel.

FIG. 10 is a schematic diagram showing a sub-pixel combination of displaying white dots according to another embodiment of the present invention. In the present embodiment, the display panel 520 displays a white dot by, for example, a sub-pixel combination including a red sub-pixel SP_R, a green sub-pixel SP_G, and a blue sub-pixel SP_B. In FIG. 10, the red sub-pixel SP_R is denoted by R212 indicating that the red sub-pixel SP_R is driven by the gamma voltage V212 and is displayed in red. The green sub-pixel SP_G is denoted as G212, indicating that the green sub-pixel SP_G is driven by the gamma voltage V212 and is displayed in green. The blue sub-pixel SP_B is denoted as B212, indicating that the blue sub-pixel SP_B is driven by the gamma voltage V212 and displays blue. The red sub-pixel SP_R, the green sub-pixel SP_G, and the blue sub-pixel SP_B operate in cooperation in the second display mode to display a white point.

FIG. 11 is a schematic diagram showing a part of pixel data according to another embodiment of the present invention. FIG. 12 is a schematic diagram showing a portion of a sub-pixel on a display panel according to another embodiment of the present invention. FIG. 13 is a schematic diagram showing a sub-pixel repeating unit according to another embodiment of the present invention; intention. Referring to FIG. 11 to FIG. 13 , the display panel 620 of the embodiment is similar to the display panel 520 of the embodiment of FIG. 8 , but the main difference between the two is, for example, the arrangement of sub-pixels on the display panel 620 and the sub-pictures. The constituent elements of the repeating unit 630.

Specifically, in the embodiment, the display panel 620 includes a plurality of sub-pixel combinations 622, which are composed of a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel adjacent arrangement. Each sub-pixel combination 622 includes two pixel units 622R, 622B. For example, in the present embodiment, the sub-pixel combination 622 adjacent to the red sub-pixel, the green sub-pixel, and the blue sub-pixel includes, for example, two pixel units 622R, 622B on the display panel 620. The pixel units 622R, 622B share three sub-pixels. Therefore, each pixel unit 622R, 622B includes 1.5 sub-pixels, wherein the pixel unit 622R includes a complete red sub-pixel, and the pixel unit 622B includes a complete pixel. Blue sub-pixels. A plurality of sub-pixel combinations 622 including three different colors are arranged in different directions of the display panel 620 to form a sub-pixel array. In the present embodiment, the pixel data P11, P12 are, for example, written in the same sub-pixel combination 622, and therefore, the sub-pixel combination 622 has two pixel widths 2WP in the X direction.

In this embodiment, a portion of the sub-pixels of the display panel 620 are arranged in an array to form the sub-pixel repeating unit 630 of FIG. The sub-pixel repeating unit 630 is repeatedly arranged to form a sub-pixel array of the display panel 620. In the present embodiment, the sub-pixel repetition unit 630 is, for example, a 4×4 pixel array formed by arranging a plurality of pixel units 622R and 622B. In the present embodiment, in addition to the gamma voltages V0, V255, the voltage output unit 320 drives the sub-pixels on the display panel 620, for example, by a gamma voltage V186 in the second display mode. In this embodiment, the gamma voltage V186 For example, according to the pixel units 622R, 622B in the sub-pixel repetition unit 630, the first quantity ratio (horizontal sub-pixel ratio) occupied in the X direction and the second quantity ratio (vertical sub-picture) occupied in the Y direction The prime ratio is determined. For example, taking the red sub-pixel as an example, in the first column of the sub-pixel repetition unit 630, the first quantity ratio of the pixel unit 622R in the same column in the X direction is the ratio of the number. It is 1/2. That is to say, based on the pixel unit, in the four pixel units 622R, 622B of the first column, the pixel unit 622R having the red sub-pixels occupies two in number, so the first quantity ratio is 1/2. Each column in the Y direction includes a pixel unit 622R, and therefore, the second number ratio of the pixel unit 622R in the Y direction is 1/1 in terms of the number ratio. That is, on the basis of the pixel unit, in the sub-pixel repetition unit 630, each column includes the pixel unit 622R having the red sub-pixel, and thus the second number ratio is 1/1. Therefore, the proportional relationship determined according to the red sub-pixel is (1/2) / (1/1) = 1/2. Similarly, the proportional relationship determined by the blue sub-pixels and the green sub-pixels is also 1/2. In the present embodiment, the gamma voltage V186 is determined, for example, according to a proportional relationship of 1/2 with a preset gamma voltage curve, and is used to drive sub-pixels of red, green, and blue on the display panel 620.

After the voltage value of the gamma voltage V186 is determined according to the arrangement of the sub-pixels on the display panel 620, the voltage output unit 320 determines the boundary relationship between the target driving sub-pixel and the plurality of sub-pixels adjacent thereto. Whether to use the determined gamma voltage V186 to drive the target driver sub-pixel. In the present embodiment, the material processing unit 310 determines the boundary relationship between the sub-pixels, for example, according to the most significant bit of the sub-pixel data of the write target driving sub-pixel and the sub-pixel adjacent thereto. In this In the embodiment, the method for determining the boundary relationship between the sub-pixels by the data processing unit 310 can obtain sufficient teaching, suggestion and implementation description from the description of the embodiment of FIG. 1 to FIG. 10, and therefore will not be described again.

FIG. 14 is a schematic diagram showing a sub-pixel combination for displaying white dots according to another embodiment of the present invention. In the present embodiment, the display panel 620 displays a white point by, for example, a sub-pixel combination including a red sub-pixel SP_R, a green sub-pixel SP_G, and a blue sub-pixel SP_B. In FIG. 14, the red sub-pixel SP_R is denoted as R186 indicating that the red sub-pixel SP_R is driven by the gamma voltage V186 and is displayed in red. The green sub-pixel SP_G is denoted as G186, indicating that the green sub-pixel SP_G is driven by the gamma voltage V186 and is displayed in green. The blue sub-pixel SP_B is denoted as B186 indicating that the blue sub-pixel SP_B is driven by the gamma voltage V186 and displays blue. The red sub-pixel SP_R, the green sub-pixel SP_G, and the blue sub-pixel SP_B operate in cooperation in the second display mode to display a white point.

FIG. 15 is a schematic diagram showing partial pixel data according to another embodiment of the present invention. 16 is a schematic diagram showing a portion of a sub-pixel on a display panel according to another embodiment of the present invention. FIG. 17 is a schematic diagram showing a sub-pixel repeating unit according to another embodiment of the present invention. Referring to FIG. 15 to FIG. 17, the display panel 720 of this embodiment is similar to the display panel 520 of the embodiment of FIG. 8, but the main difference between the two is, for example, the arrangement of sub-pixels on the display panel 720, and the sub-pictures. The constituent elements of the repeating unit 730.

Specifically, in the present embodiment, the display panel 720 includes a plurality of pixel units 722R, 722G, and 722B, and each of the pixel units 722R, 722G, and 722B includes one sub-pixel. For example, in the present embodiment, the pixel unit 722R is, for example, a package. Including the red sub-pixel, the pixel unit 722B includes, for example, a blue sub-pixel, and the pixel unit 722G includes, for example, a green sub-pixel. Three pixel units 722R, 722G, 722B including different color sub-pixels are staggered in different directions of the display panel 720 to form a sub-pixel array. In the present embodiment, the pixel material P11 is, for example, the write pixel unit 722R, and therefore both have a pixel width WP in the X direction.

In this embodiment, a portion of the sub-pixels of the display panel 720 are arranged in an array to form the sub-pixel repeating unit 730 of FIG. The sub-pixel repeating unit 730 is repeatedly arranged to form a sub-pixel array of the display panel 720. In the present embodiment, the sub-pixel repetition unit 730 is, for example, a 4×4 pixel array formed by arranging a plurality of pixel units 722R, 722G, and 722B. In the present embodiment, in addition to the gamma voltages V0, V255, the voltage output unit 320 drives the sub-pixels on the display panel 720, for example, by a gamma voltage V186 in the second display mode. In the present embodiment, the gamma voltage V186 is, for example, the first number ratio (horizontal sub-pixel ratio) occupied in the X direction in the sub-pixel repetition unit 730 according to the pixel units 722R, 722G, 722B and in Y. The second quantity ratio (vertical sub-pixel ratio) occupied in the direction is determined. For example, taking the red sub-pixel as an example, in the first column of the sub-pixel repetition unit 730, the first quantity ratio of the pixel unit 722R in the same column in the X direction is the ratio of the number. It is 1/2. That is, on the basis of the pixel unit, in the four pixel units 722R, 722G, and 722B of the first column, the pixel unit 722R having the red sub-pixels occupies two in number, and thus the first number The ratio is 1/2. The pixel unit 722R is included every one column in the Y direction, and therefore, the second number ratio of the pixel unit 722R in the Y direction is 1/2 in terms of the number ratio. That is, Based on the pixel unit, in the sub-pixel repetition unit 730, the pixel unit 722R having the red sub-pixel is included every interval, so the second number ratio is 1/2. Therefore, the proportional relationship determined according to the red sub-pixel is (1/2) / (1/2) = 1. Similarly, the proportional relationship determined by the blue sub-pixel is also 1. Further, in the present embodiment, taking the green sub-pixel as an example, in the sub-pixel repetition unit 730, the first number ratio of the pixel unit 722G occupying in the same column in the X direction is 1/2. Each column in the Y direction includes a pixel unit 722G, and therefore, the second number ratio of the pixel unit 722G in the Y direction is 1/1. That is to say, based on the pixel unit, in the sub-pixel repetition unit 730, each column includes a pixel unit 722G having a green sub-pixel, and thus the second number ratio is 1/1. Therefore, the proportional relationship determined according to the green sub-pixel is (1/2) / (1/1) = 1/2. Therefore, in the present embodiment, the gamma voltage V186 is determined, for example, according to a proportional relationship of 1/2 with a preset gamma voltage curve, and is used to drive a green sub-pixel on the display panel 720. Further, in the present embodiment, the red and blue sub-pixels are driven, for example, by gamma voltages V0 or V255.

After the voltage value of the gamma voltage V186 is determined according to the arrangement of the sub-pixels on the display panel 720, the voltage output unit 320 determines the boundary relationship between the target driving sub-pixel and the plurality of sub-pixels adjacent thereto. Whether to use the determined gamma voltage V186 to drive the target driver sub-pixel. In the present embodiment, the material processing unit 310 determines the boundary relationship between the sub-pixels, for example, according to the most significant bit of the sub-pixel data of the write target driving sub-pixel and the sub-pixel adjacent thereto. In the embodiment, the method for determining the boundary relationship between the sub-pixels by the data processing unit 310 can obtain sufficient teaching, suggestion and implementation from the description of the embodiment of FIG. 1 to FIG. Explain, so I won't go into details.

FIG. 18 is a schematic diagram showing a sub-pixel combination for displaying white dots according to another embodiment of the present invention. In the present embodiment, the display panel 820 displays a white dot by, for example, a sub-pixel combination including a red sub-pixel SP_R, two green sub-pixels SP_G, and a blue sub-pixel SP_B. In FIG. 18, the red sub-pixel SP_R is denoted as R255 to indicate that the red sub-pixel SP_R is driven by the gamma voltage V255 and is displayed in red. The green sub-pixel SP_G is denoted as G186, indicating that the green sub-pixel SP_G is driven by the gamma voltage V186 and is displayed in green. The blue sub-pixel SP_B is indicated by B255 to indicate that the blue sub-pixel SP_B is driven by the gamma voltage V255 and displays blue. In the present embodiment, one red sub-pixel SP_R, two green sub-pixels SP_G, and one blue sub-pixel SP_B cooperate in the second display mode to display a white point.

FIG. 19 is a flow chart showing the steps of a display driving method according to an embodiment of the invention. The display driving method is at least applied to the display device 100 of FIG. 1, for example. The display driving method is as follows. In step S900, at least one proportional relationship related to the arrangement of the sub-pixels on the display panel 120 is based on at least one of the red sub-pixel, the green sub-pixel, and the blue sub-pixel on the display panel 120. The direction and the arrangement of the Y direction are determined. Next, in step S910, the voltage value of at least one of the plurality of gamma voltages V0, V186, and V255 is determined according to the proportional relationship determined in step S900. Thereafter, in step S920, the display driver 110 selects to use the first display driving channel 112 or the second display driving channel 114 in the first display mode or the second display mode according to the selection signal SEL. The display panel 120 is driven to display an image screen.

In step S920, if the display driver 110 selects to drive the display panel 120 to display the image frame by using the first display driving channel 112 in the first display mode according to the selection signal SEL, the display driving method performs step S930. In step S930, the first display driving channel 112 drives the display panel 120 to display the image frame by using the gamma voltages V0, V255 and other preset gamma voltages in the first display mode.

In step S920, if the display driver 110 selects to use the second display driving channel 114 to drive the display panel 120 to display the image frame in the second display mode according to the selection signal SEL, the display driving method performs step S940. In step S940, the second display driving channel 114 determines the target driving according to the highest effective bit of the sub-pixel data of the write target driving sub-pixel and the plurality of sub-pixels adjacent thereto in the second display mode. A boundary between a subpixel and its neighboring subpixels. Next, in step S950, the second display driving channel 114 determines whether to drive the target driving sub-pixel by the gamma voltage V186 determined in step S910 according to the boundary relationship in the second display mode.

In step S950, if the second display driving channel 114 decides to drive the target driving sub-pixel by the gamma voltage V186, the display driving method performs step S960. In step S960, the second display driving channel 114 drives the target driving sub-pixel using the gamma voltage V186. In step S950, if the second display driving channel 114 decides not to drive the target driving sub-pixel by the gamma voltage V186, the display driving method performs step S970. In step S970, the second display driving channel 114 The target driver sub-pixel is driven by the gamma voltage V0 or V255.

In addition, the display driving method of the embodiment of the present invention can obtain sufficient teachings, suggestions, and implementation descriptions from the description of the embodiment of FIG. 1 to FIG. 18, and thus will not be described again.

In summary, in an exemplary embodiment of the present invention, a voltage value of at least one gamma voltage of the plurality of gamma voltages for driving the display panel is determined according to a proportional relationship, and the proportional relationship is based on different colors. The sub-pixels are determined by the arrangement of the display panels in different directions. In the second display mode, the display driver according to the exemplary embodiment of the present invention determines whether to use the determined gamma voltage to drive the display panel according to the boundary relationship between the sub-pixels to achieve both display quality and energy saving.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

110‧‧‧ display driver

112‧‧‧First display drive channel

114‧‧‧Second display drive channel

116‧‧‧Selection unit

210‧‧‧First voltage converter

220‧‧‧Boundary Detection Circuit

230‧‧‧pixel filter circuit

240‧‧‧Second voltage converter

310‧‧‧ Data Processing Unit

320‧‧‧Voltage output unit

S1‧‧‧ Display information

S2, S3‧‧‧ drive signals

SEL‧‧‧Select signal

Claims (26)

A display driver for driving a display panel, wherein the display panel is configured to display an image frame in a first display mode or a second display mode, the display driver comprising: a first display driving channel, in a a first display mode, using a sub-pixel imaging method to drive the display panel to display an image frame; and a second display driving channel, in a second display mode, using the sub-pixel imaging method to drive the display panel display The image frame, wherein the display panel includes a sub-pixel repeating unit, and the sub-pixel repeating unit is repeatedly arranged to form the display panel, the sub-pixel repeating unit includes a plurality of pixel units, each of the pixel units including One or two sub-pixels, wherein in the second display mode, the second display driving channel uses a plurality of gamma voltages to drive the sub-pixels on the display panel to display corresponding grayscale values, and the The voltage value of at least one of the gamma voltages is determined according to the arrangement of the sub-pixels on the display panel. The display driver according to claim 1, wherein in the display panel, each of the pixel units includes a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel. At least one of the voltage values of the at least one gamma voltage of the gamma voltages is determined according to at least one proportional relationship, wherein the at least one proportional relationship is based on the first color sub-pixel, the first At least one of the two color subpixels and the third color subpixel is repeated in the subpixel In the unit, based on the pixel unit, a first quantity ratio occupies in a first direction and a second quantity ratio occupies in a second direction are determined. The display driver of claim 2, wherein in the display panel, the pixel units comprise a first pixel unit and a second pixel unit, the first color sub-pixel and the first The two color subpixels are adjacently arranged to form the first pixel unit, and the third color subpixel and the second color subpixel are adjacently arranged to form the second pixel unit. The display driver of claim 2, wherein in the display panel, the pixel units comprise a first pixel unit, a second pixel unit, and a third pixel unit, the first The color sub-pixel and the second color sub-pixel are adjacently arranged to form the first pixel unit, and the third color sub-pixel and the second color sub-pixel are adjacently arranged to form the second pixel unit And the first color subpixel and the third color subpixel are adjacently arranged to form the third pixel unit. The display driver of claim 2, wherein in the display panel, the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are adjacently arranged to form the Two pixel units in the pixel unit. The display driver of claim 2, wherein in the display panel, each of the pixel units comprises a single sub-pixel, and the single sub-pixel includes the first color sub-pixel, the first Two color subpixels or the third color subpixels. The display driver of claim 2, wherein in the display panel, the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are respectively red sub-pixels, Green sub-pixels and blue sub-pixels. The display driver of claim 1, wherein the sub-pixels comprise a target driver sub-pixel, and in the second display mode, the second display driving channel drives the sub-pixels according to the target and A boundary relationship between the adjacent plurality of sub-pixels determines whether the target driving sub-pixel is driven by the determined at least one gamma voltage. The display driver of claim 8, wherein the second display driving channel is based on writing the target driver sub-pixel and the most significant bit of the sub-pixel data of the sub-pixels adjacent thereto. Determine the boundary relationship. The display driver of claim 9, wherein the second display driving channel comprises: a data processing unit for writing the sub-pixels of the target and the sub-pixels adjacent thereto according to the target processing pixel Determining the boundary relationship by the most significant bit of the pixel data; and a voltage output unit determining whether to utilize the determined relationship according to the boundary relationship between the target driving sub-pixel and the plurality of sub-pixels adjacent thereto At least one gamma voltage to drive the target drive sub-pixel. The display driver of claim 1, wherein the gamma voltages comprise a first gamma voltage, a second gamma voltage, and a third gamma voltage, and a voltage of the third gamma voltage The value is determined according to the arrangement of the sub-pixels on the display panel, wherein the voltage value of the first gamma voltage is less than the voltage value of the second gamma voltage, and the voltage value of the third gamma voltage is The first gamma voltage and the second Between the voltage values of the gamma voltage. The display driver of claim 11, wherein the gamma voltage further comprises a fourth gamma voltage, and the voltage value of the fourth gamma voltage is further based on the sub-pixels of the display panel The arrangement determines the voltage value of the fourth gamma voltage between the first gamma voltage and the voltage value of the third gamma voltage. The display driver of claim 11, further comprising: a selection unit, configured to drive the display panel on the first display by using the first display driving channel or the second display driving channel according to a selection signal The image screen is displayed in the mode or the second display mode. A display device comprising: a display panel comprising a sub-pixel repeating unit, the sub-pixel repeating unit is repeatedly arranged to form the display panel, the sub-pixel repeating unit comprises a plurality of pixel units, each of the pixel units The display panel is configured to display an image frame in a first display mode or a second display mode; and a display driver coupled to the display panel includes a first display driver a channel and a second display driving channel for driving the display panel to display the image frame by using a sub-pixel imaging method, wherein in the second display mode, the second display driving channel uses a plurality of gamma voltages Driving the sub-pixels on the display panel to display corresponding grayscale values, and determining voltage values of at least one of the gamma voltages according to the arrangement of the sub-pixels on the display panel . The display device of claim 14, wherein in the display panel, each of the pixel units comprises a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel At least one of the voltage values of the at least one gamma voltage of the gamma voltages is determined according to at least one proportional relationship, wherein the at least one proportional relationship is based on the first color sub-pixel, the first At least one of the two-color sub-pixel and the third color sub-pixel is determined by a ratio of the second-pixel sub-pixel in a first direction and a ratio occupied in a second direction. The display device of claim 15, wherein in the display panel, the pixel units comprise a first pixel unit and a second pixel unit, the first color sub-pixel and the first The two color subpixels are adjacently arranged to form the first pixel unit, and the third color subpixel and the second color subpixel are adjacently arranged to form the second pixel unit. The display device of claim 15, wherein the pixel unit comprises a first pixel unit, a second pixel unit and a third pixel unit, the first The color sub-pixel and the second color sub-pixel are adjacently arranged to form the first pixel unit, and the third color sub-pixel and the second color sub-pixel are adjacently arranged to form the second pixel unit And the first color subpixel and the third color subpixel are adjacently arranged to form the third pixel unit. The display device of claim 15, wherein the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel in the display panel The pixels are arranged adjacent to each other to form two pixel units among the pixel units. The display device of claim 15, wherein in the display panel, each of the pixel units includes a single sub-pixel, and the single sub-pixel includes the first color sub-pixel, the first Two color subpixels or the third color subpixels. The display device of claim 15, wherein in the display panel, the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are respectively red sub-pixels, Green sub-pixels and blue sub-pixels. The display device of claim 14, wherein the sub-pixels comprise a target driver sub-pixel, and in the second display mode, the second display driving channel drives the sub-pixels according to the target and A boundary relationship between the adjacent plurality of sub-pixels determines whether the target driving sub-pixel is driven by the determined at least one gamma voltage. The display device of claim 21, wherein the second display driving channel is based on writing the target driving sub-pixel and the most significant bit of the sub-pixel data of the sub-pixels adjacent thereto. Determine the boundary relationship. The display device of claim 22, wherein the second display driving channel comprises: a data processing unit for writing a sub-pixel of the target driving sub-pixel and the sub-pixels adjacent thereto The most significant bit of the pixel data determines the boundary relationship; and a voltage output unit coupled to the data processing unit for driving the sub-pixel between the target pixel and the plurality of sub-pixels adjacent thereto The boundary relationship is judged to be Whether the target driving sub-pixel is driven by the determined at least one gamma voltage. The display device of claim 14, wherein the gamma voltages comprise a first gamma voltage, a second gamma voltage, and a third gamma voltage, and a voltage of the third gamma voltage The value is determined according to the arrangement of the sub-pixels on the display panel, wherein the voltage value of the first gamma voltage is less than the voltage value of the second gamma voltage, and the voltage value of the third gamma voltage is Between the first gamma voltage and the voltage value of the second gamma voltage. The display device of claim 24, wherein the gamma voltage further comprises a fourth gamma voltage, and the voltage value of the fourth gamma voltage is further based on the sub-pixels of the display panel The arrangement determines the voltage value of the fourth gamma voltage between the first gamma voltage and the voltage value of the third gamma voltage. The display device of claim 25, wherein the display driver further comprises: a selection unit, configured to drive the display panel by using the first display driving channel or the second display driving channel according to a selection signal The image frame is displayed in the first display mode or the second display mode.