CN114613340A - Display panel, display module system, display driving method and display driving device - Google Patents

Display panel, display module system, display driving method and display driving device Download PDF

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CN114613340A
CN114613340A CN202210267623.XA CN202210267623A CN114613340A CN 114613340 A CN114613340 A CN 114613340A CN 202210267623 A CN202210267623 A CN 202210267623A CN 114613340 A CN114613340 A CN 114613340A
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pixel
light
gray scale
gray
emitting element
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CN114613340B (en
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王铮
包凤卿
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The disclosure provides a display panel, a display module system, a display driving method and a display driving device. The display panel comprises a first liquid crystal panel and a second liquid crystal panel which are arranged in a stacked mode, wherein the first liquid crystal panel is provided with a plurality of color pixels which are arranged in an array mode, the second liquid crystal panel is provided with a plurality of gray-scale pixels which are arranged in an array mode, and each gray-scale pixel is opposite to the plurality of color pixels which are arranged in the array mode. The display panel is beneficial to reducing power consumption, reducing cost, improving display brightness, improving display contrast and reducing computation.

Description

Display panel, display module system, display driving method and display driving device
Technical Field
The disclosure belongs to the technical field of display, and particularly relates to a display panel, a display module, a display system, a display driving method and a display driving device.
Background
This section is intended to provide a background or context to the embodiments recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Liquid crystal display technology is a common display technology. The technical problems to be continuously explored by those skilled in the art are to improve the display effect of the liquid crystal display and to try to reduce the power consumption of the liquid crystal display.
Disclosure of Invention
The disclosure provides a display panel, a display module system, a display driving method and a display driving device.
The first aspect of the present disclosure provides a display panel, which includes a first liquid crystal panel and a second liquid crystal panel that are stacked, where the first liquid crystal panel has a plurality of color pixels arranged in an array, and the second liquid crystal panel has a plurality of grayscale pixels arranged in an array, and each of the grayscale pixels faces a plurality of the color pixels arranged in an array.
In some embodiments, each of the gray pixels corresponds to a plurality of color pixels that are equal in size and arranged in a rectangle.
In some embodiments, the display panel includes a first substrate, a second substrate, and a third substrate stacked in a layer, the first liquid crystal panel includes the first substrate, the second substrate, and a first liquid crystal layer formed between the first substrate and the second substrate, and the second liquid crystal panel includes the second substrate, the third substrate, and a second liquid crystal layer formed between the second substrate and the third substrate.
A second aspect of the present disclosure provides a display module, including a backlight panel, a first polarizer, a second polarizer, and the display panel of the first aspect of the present disclosure, where the first polarizer is disposed on a side of the first liquid crystal panel opposite to the second liquid crystal panel, the second polarizer is disposed on a side of the second liquid crystal panel opposite to the first liquid crystal panel, the backlight panel is provided with a plurality of light emitting elements arranged in an array, the light emitting elements are configured to emit light toward the second polarizer, all the gray scale pixels are divided into a plurality of dimming regions arranged in an array, each dimming region includes a plurality of gray scale pixels arranged in an array, a corner of each dimming region is opposite to one light emitting element, and adjacent corners of adjacent dimming regions share one light emitting element.
In some embodiments, a top corner of each of the dimming regions faces a center of one of the light emitting elements.
In some embodiments, the display module further includes an optical film disposed between the light emitting element and the second polarizer.
A third aspect of the present disclosure provides a display driving method for driving a display module according to the second aspect of the present disclosure, the method comprising:
determining the pixel gray scale of an image frame to be displayed;
determining the brightness parameters of all the light-emitting elements according to the pixel gray scale of the image frame to be displayed;
determining the brightness parameter of the light received by each gray scale pixel in the dimming area according to the brightness parameter of the light-emitting element corresponding to the dimming area;
determining the gray scale of each gray scale pixel according to the brightness parameter of the light received by each gray scale pixel and the pixel gray scale of the color pixel opposite to each gray scale pixel;
and driving the first liquid crystal panel according to the image frame to be displayed, synchronously driving each gray scale pixel according to the determined gray scale of each gray scale pixel, and synchronously driving each light-emitting element according to the determined brightness parameter of each light-emitting element.
In some embodiments, determining the brightness parameter of each light-emitting element according to the pixel gray scale of the image frame to be displayed includes:
determining a rectangular region formed by extending a vertex angle corresponding to a corresponding dimming region of any light-emitting element to a midpoint of a corresponding side in an extending direction of the side of the dimming region adjacent to the vertex angle, and calculating a pixel gray scale mean value in a display region of the image frame to be displayed corresponding to the determined rectangular region;
and mapping the pixel gray scale mean value corresponding to any light-emitting element into the brightness level of any light-emitting element, wherein the brightness parameter comprises the brightness level.
In some embodiments, determining the brightness parameter of the light received by each gray scale pixel in the dimming region according to the brightness parameter of the light emitting element corresponding to the dimming region includes:
the brightness level of the light-emitting element corresponding to the brightness of the light received by any gray scale pixel is determined according to the brightness levels of the 4 light-emitting elements corresponding to the dimming area where any gray scale pixel is located and the distance parameters between the 4 light-emitting elements and any gray scale pixel, and the brightness parameter of the light received by each gray scale pixel is calculated according to the brightness level of the light-emitting element.
In some embodiments, determining the gray scale of each gray scale pixel according to the brightness parameter of the light received by each gray scale pixel and the pixel gray scale of the color pixel directly opposite to each gray scale pixel comprises calculating the gray scale of each gray scale pixel according to the following formula:
Gk＝[Gt*(N-1)]/P(x，y)；
wherein, P(x，y)Is the brightness level of the light-emitting element corresponding to the light received by the gray scale pixel with coordinates (x, y), N is the total number of available gray scales of the gray scale pixel, GtThe gray scale is the average gray scale of the color pixels corresponding to the gray scale pixel with the coordinate (x, y) in the image frame to be displayed, wherein k is a proportionality coefficient.
A 4 th aspect of the present disclosure provides a display driving device including: the first determining module is used for determining the pixel gray scale of the image frame to be displayed; the second determining module is used for determining the brightness parameter of each light-emitting element according to the pixel gray scale of the image frame to be displayed; the third determining module is used for determining the brightness parameter of the light received by each gray scale pixel in the dimming area according to the brightness parameter of the light-emitting element corresponding to the dimming area; the fourth determining module is used for determining the gray scale of each gray scale pixel according to the brightness parameter of the light received by each gray scale pixel and the pixel gray scale of the color pixel opposite to each gray scale pixel; and the output module is used for driving the first liquid crystal panel according to the image frame to be displayed, synchronously driving each gray-scale pixel according to the determined gray scale of each gray-scale pixel, and synchronously driving each light-emitting element according to the determined brightness parameter of each light-emitting element.
A fifth aspect of the present disclosure provides a display driving apparatus including a memory storing instructions and a processor executing the instructions to perform the display driving method of the third aspect of the present disclosure.
A sixth aspect of the present disclosure provides a display system comprising the display module of the second aspect of the present disclosure, and a display driving device comprising the 4 th aspect or the fifth aspect of the present disclosure.
Drawings
Fig. 1 is a schematic structural diagram of a display system provided in an embodiment of the present disclosure.
Fig. 2 is a schematic diagram of a dividing manner of the backlight partition in the embodiment of the disclosure.
Fig. 3 is a schematic diagram illustrating a division manner of the dimming partition in the embodiment of the present disclosure.
Fig. 4 is a schematic diagram of luminance distribution of light emitting elements in an embodiment of the present disclosure.
Fig. 5 is a schematic diagram illustrating an image gray scale statistics manner of color pixels directly opposite to each other in gray scale pixels according to embodiment 1 of the present disclosure.
Fig. 6 is a flowchart illustrating a display driving method according to an embodiment of the disclosure.
Fig. 7 is a block diagram of a display driving apparatus according to an embodiment of the present disclosure.
Fig. 8 is a block diagram of a display driving apparatus according to another embodiment of the present disclosure.
10, a first liquid crystal panel; p, color pixels; 20. a second liquid crystal panel; 2a, gray scale pixels; 30. an optical film; 40. a backlight plate; 41. a light emitting element; 4a, a dimming area; 50. a backlight driving assembly; 701. a first determination module; 702. a second determination module; 703. a third determination module; 704. a 4 th determination module; 705. an output module; 801. a memory; 802. a processor.
Detailed Description
The disclosure will be further described with reference to the embodiments shown in the drawings.
Some of the two-layer liquid crystal display panels known to the inventors of the present disclosure have one layer of liquid crystal display panel having color pixels and the other layer of liquid crystal display panel having gray scale pixels, which are opposite to each other in one-to-one correspondence with the color pixels. Although the contrast of the double-layer liquid crystal display panel can be greatly improved, the calculation amount and the power consumption for driving the double-layer liquid crystal display panel are very large. And the gray pixel density is very high, which also causes the light transmittance of the double-layer liquid crystal display panel to be very low, further increasing the power consumption of the backlight source.
With reference to fig. 1 to 5, an embodiment of the present disclosure provides a display panel, which includes a first liquid crystal panel 10 and a second liquid crystal panel 20 that are stacked, where the first liquid crystal panel 10 has a plurality of color pixels P arranged in an array, the second liquid crystal panel 20 has a plurality of grayscale pixels 2a arranged in an array, and each of the grayscale pixels 2a faces the plurality of color pixels P arranged in an array.
A color film is provided in the first liquid crystal panel 10. This for example results in each color pixel P comprising 3 differently colored sub-pixels. And no color film is provided in the second liquid crystal panel 20. The second liquid crystal panel 20 simply functions to adjust brightness.
In most cases, the difference in luminance between adjacent pixels in one frame of an image to be displayed is not large. Therefore, using a gray pixel 2a to adjust the brightness of the color pixels P in a smaller area can also provide a higher display contrast as known by the inventor of the present disclosure.
On the other hand, since the resolution of the second liquid crystal panel 20 is low, the transmittance of the second liquid crystal panel 20 is high, which is not only beneficial to improving the display brightness, but also beneficial to reducing the power consumption.
Further, the resolution of the second liquid crystal panel 20 is low, and the amount of calculation required for determining the gradation of each gradation pixel 2a is also greatly reduced, which is also advantageous in reducing power consumption.
In some embodiments, each of the gray pixels 2a corresponds to a plurality of color pixels P having the same size and arranged in a rectangular shape. Of course, the display area may be divided into a central area and a peripheral area, where the number of color pixels P corresponding to the gray scale pixels 2a in the central area is relatively small, and the number of color pixels P corresponding to the gray scale pixels 2a in the peripheral area is relatively large. I.e. the accuracy of the brightness adjustment for the central area of the display may be greater than the accuracy of the brightness adjustment for the peripheral areas of the display.
In some embodiments, the display panel includes a first substrate, a second substrate, and a third substrate, which are stacked, the first liquid crystal panel 10 includes the first substrate, the second substrate, and a first liquid crystal layer formed between the first substrate and the second substrate, and the second liquid crystal panel 20 includes the second substrate, the third substrate, and a second liquid crystal layer formed between the second substrate and the third substrate.
The first substrate, the second substrate, and the third substrate are, for example, glass substrates. The first substrate is also commonly referred to as a color filter substrate. The two liquid crystal panels share one glass substrate. This is to reduce the thickness of the display panel. Of course, the first liquid crystal panel 10 and the second liquid crystal panel 20 may be two liquid crystal panels that can be independently separated.
With reference to fig. 1 to 5, an embodiment of the present disclosure further provides a display module including a backlight panel 40, a first polarizer (not shown, also commonly referred to as an upper polarizer), a second polarizer (not shown, also commonly referred to as a lower polarizer), and the display panel of the foregoing embodiment, where the first polarizer is disposed on a side of the first liquid crystal panel 10 opposite to the second liquid crystal panel 20, and the second polarizer is disposed on a side of the second liquid crystal panel 20 opposite to the first liquid crystal panel 10. The backlight plate 40 is provided with a plurality of light emitting elements 41 arranged in an array, and the light emitting elements 41 are used for emitting light toward the second polarizer.
Specifically, the first polarizer is attached to the light emitting surface of the first liquid crystal panel, and the second polarizer is attached to the light incident surface of the second liquid crystal panel.
All the gray scale pixels 2a are divided into a plurality of dimming regions 4a arranged in an array, each of the dimming regions 4a includes a plurality of the gray scale pixels 2a arranged in an array, a corner of each of the dimming regions 4a is opposite to one of the light emitting elements 41, wherein adjacent corners of adjacent dimming regions 4a share one of the light emitting elements 41.
The light emitting element 41 may be a conventional light emitting diode (LED lamp). This can reduce the cost of the backlight panel. One light emitting element 41 is disposed at the 4-corner position of each dimming region 4a, which enables the light received by each gray scale pixel 2a within the dimming region 4a to be relatively uniform.
Specifically, the single dimming region 4a corresponds to m × n grayscale pixels 2a (m in the lateral direction and n in the vertical direction). When the number of light-emitting elements 41 required is denoted by N, N is 4+2 (m-1) +2 (N-1) + (m-1) × (N-1).
In a specific example, the resolution of the first liquid crystal panel 10 is 1920 × 1080, the dimming regions 4a are arranged in an array of 16 × 9, and the corresponding grayscale pixels 2a in each dimming region 4a are arranged in an array of 30 × 30. The display module has 170 light emitting elements 41, 129600 gray pixels 2a, 2073600 color pixels P.
The number of the visible light emitting elements 41 and the gradation pixels 2a is very small relative to the number of the color pixels P. This greatly reduces the cost of the backlight panel 40.
In some embodiments, the top corner of each of the dimming regions 4a faces the center of one of the light emitting elements 41. With this arrangement, it is possible to make it easier to subsequently determine the gradation of each gradation pixel 2 a.
In other embodiments, in order to increase the utilization rate of light of the light emitting elements 41 to a greater extent, referring to fig. 2, the position of the outermost ring of light emitting elements 41 is shifted inward relative to the previous embodiments.
In some embodiments, the display module further includes an optical film 30 disposed between the light emitting element 41 and the second polarizer.
The optical film 30 may include, for example, an upper diffusion sheet, an upper prism sheet, a lower diffusion sheet, and the like. Of course, the optical film 30 may be increased or decreased as appropriate, such as removing the prism sheet or adding a Brightness Enhancement Film (BEF).
The backlight driving assembly 50 is used to control the brightness of each light emitting element 41 in the backlight panel 40, and includes, for example, a Microcontroller (MCU), a light emitting element driving circuit, a voltage stabilizing power supply circuit, and the like.
Based on the above structure, referring to fig. 6, an embodiment of the present disclosure further provides a display driving method for driving the display module of the foregoing embodiment, where the method includes the following steps.
Step 101, determining a pixel gray scale of an image frame to be displayed.
Specifically, an image frame to be displayed (typically, a color image) may be acquired by the display driving apparatus described later, and then the image frame to be displayed may be converted into a grayscale image by the display driving apparatus. Each pixel in the gray scale image represents the gray scale of one color pixel P.
Step 102, determining the brightness parameter of each light-emitting element 41 according to the pixel gray scale of the image frame to be displayed.
Specifically, a rectangular region is determined, which is formed by extending from a corresponding vertex angle of the corresponding dimming region 4a of any one of the light emitting elements 41 (i.e., a vertex angle of the dimming region 4a closest to the light emitting element 41) to a midpoint of a corresponding side in an extending direction of the side of the dimming region 4a adjacent to the vertex angle, and a pixel gray-scale average value in the display region of the image frame to be displayed corresponding to the determined rectangular region is calculated.
Referring to the region indicated by the thick black solid line located at the lower left corner in fig. 2, for the light emitting elements 41 at the 4 corners, the average value of the pixel gradations in the rectangular region where the top angle of the light modulation region 4a by the light emitting element 41 is the top angle and the half of the length and width of the light modulation region 4a is the length and width is calculated.
Following the previous example, for the light emitting elements 41 at 4 corners, it is necessary to calculate the gray-scale average of the pixels in the rectangular area with the end point of the image frame to be displayed as the end point and the 1/2 side length of the dimming area 4a as the side length. Specifically, a pixel gray scale mean of 900 pixels needs to be calculated.
With continued reference to the region indicated by the thick black solid line on the left side in fig. 2, for the light emitting elements 41 on 4 sides (excluding the light emitting elements 41 on the corners described above), the pixel grayscale average value in the rectangular region of 1/2 in which the light emitting element 41 is the midpoint of one side and the adjacent side is the side corresponding to the dimming region 4a is calculated.
In the previous example, for the light emitting elements 41 on 4 sides not including 4 corners, it is necessary to calculate the pixel gray-scale average value in the rectangular region having the side length of the dimming region 4a extending inward 1/2 with the light emitting element 41 as the midpoint of one side. Specifically, a pixel gray scale average of 1800 pixels needs to be calculated.
With continued reference to the region marked by bold black in the middle of fig. 2, for the light emitting element 41 located in the non-edge region, the pixel gray-scale average value in the rectangular region centered on the light emitting element 41 and having the length and width of the dimming region 4a as the length and width is calculated.
Following the foregoing example, for the non-edge light emitting element 41, it is necessary to calculate the pixel grayscale mean value in the rectangular region centered on the light emitting element 41. Specifically, the pixel gray-scale mean of 3600 pixels needs to be calculated.
Of course, to determine how bright each light emitting element 41 needs to emit light, the gray-scale average of a wider range of pixels in the image frame to be displayed may also be referenced.
To simplify the operation, the result of the pixel gray-scale mean is rounded, leaving out the fraction points later.
Subsequently, the pixel grayscale mean corresponding to any one of the light emitting elements 41 is mapped to the luminance level of any one of the light emitting elements 41, and the luminance parameter includes the luminance level.
The correspondence between the luminance level of the light emitting element 41 and the average value of the pixel gray levels is preset and determined by a developer through experimental debugging.
For example, in a practical example, the luminance of the light emitting element 41 is divided into 100 levels (1 to 100), and the gray scale of the image frame to be displayed has 256 levels (0 to 255). Assuming that the pixel grayscale averages for the 4 light-emitting elements 41 of one dimming region 4a are calculated to be 192, 128 in this order, the luminance levels mapped to the light-emitting elements 41 are 75, 50 in this order.
Of course, the absolute luminance of the light emitting element 41 may be used as the luminance parameter, but this increases the amount of calculation.
Step 103, determining the brightness parameter of the light received by each gray scale pixel 2a in the dimming area 4a according to the brightness parameter of the light emitting element 41 corresponding to the dimming area 4 a.
The law of the attenuation of the light emitted by one light-emitting element 41 with distance is determined. The closer a gray-scale pixel 2a is to a light-emitting element 41, the stronger the light emitted from the light-emitting element 41 is received by the gray-scale pixel 2 a.
Specifically, the luminance level of the light emitting element 41 corresponding to the luminance of the light received by any one of the gradation pixels 2a is determined based on the luminance levels of the 4 light emitting elements 41 corresponding to the dimming region 4a in which any one of the gradation pixels 2a is located and the distance parameter between the 4 light emitting elements 41 and any one of the gradation pixels 2a, and the luminance parameter of the light received by each gradation pixel 2a is calculated in units of the luminance level of the light emitting element 41.
In other words, the luminance of the light emitted from the 4 light emitting elements 41 received by one gradation pixel 2a is equivalent to the luminance level of one light emitting element 41.
Specifically, the luminance level of the light-emitting element 41 received by one of the grayscale pixels 2a is inversely proportional to the square of the distance therebetween. Fig. 4 shows the distribution of the luminance levels when the light emitted from the light emitting elements 41 located at the four corners in one dimming division reaches the respective gradation pixels 2a (the gradation pixels 2a have not been passed).
In the embodiment of the present disclosure, the following formula is used to calculate the brightness level corresponding to the intensity of the light emitted from the 4 surrounding light-emitting elements 41 received by one gray-scale pixel 2 a:
Figure BDA0003552448380000081
where P (x, y) is the luminance level received by the gradation pixel 2a at the coordinate (x, y),Pl1to Pl4The brightness levels of the light emitted from the light emitting elements 41 at the four corners of the dimming region 4a, m is the number of the horizontal gray scale pixels 2a in one dimming region 4a, and n is the number of the vertical gray scale pixels 2a in one dimming region 4 a.
Referring to fig. 3, one dimming region 4a in this embodiment contains 900 grayscale pixels 2a arranged in a 30 x 30 array. Following the previous example, i.e. assuming that the brightness levels of the light emitting elements 41 at the four corners of one dimming region 4a are 75, 50 and 50 in this order, the brightness level of the light received by the gray scale pixel 2a at the position with coordinates of (15, 15) is:
P(15，15)＝{75*[1-(142+142)/(302+302)]+75*[1-(152+142)/(302+302)]+50*(1-(142+152)/(302+302))+50*(1-(152+152)/(302+302)]}/4＝47.81≈48。
step 104, determining the gray scale of each gray scale pixel 2a according to the brightness parameter of the light received by each gray scale pixel 2a and the pixel gray scale of the color pixel P directly opposite to each gray scale pixel 2 a.
Specifically, the gray scale of each gray scale pixel 2a is calculated according to the following formula:
Gk＝[Gt*(N-1)]/P(x，y)；
wherein, P(x，y)The gray scale pixel 2a with coordinates (x, y) receives the brightness level of the light emitting element 41 corresponding to the light of the light emitting element 41, N is the total number of available gray scales of the gray scale pixel 2a, the minimum gray scale of the gray scale pixel 2a is 0, GtIs the average gray scale of the color pixel P corresponding to the gray scale pixel 2a with the coordinate (x, y) in the image frame to be displayed.
Specifically, referring to fig. 5, the pixel gray scale of the image to be displayed in the area corresponding to one gray pixel 2a is averaged, and the result is denoted as Gt. In the example shown in FIG. 5, Gt＝51。
Step 105, driving the first liquid crystal panel 10 according to the frame to be displayed, and synchronously driving each gray-scale pixel 2a according to the determined gray-scale of each gray-scale pixel 2a, and synchronously driving each light-emitting element 41 according to the determined brightness parameter of each light-emitting element 41.
That is, it is necessary to adjust the luminance of the light emitting element 41 and the light transmittance of the gradation pixel 2a in synchronization with each other when displaying an image for each frame. The above 3 actions can be synchronized with the frame synchronization signal.
The display driving method is based on the display module, the number of the gray pixels 2a and the number of the light emitting elements 41 are small, and the calculation amount is very low.
The calculation amount is further reduced by measuring the brightness of the light by adopting the brightness level.
Based on the same inventive concept, referring to fig. 7, an embodiment of the present disclosure also provides a display driving apparatus including: a first determining module 701, configured to determine a pixel gray scale of an image frame to be displayed; a second determining module 702, configured to determine a luminance parameter of each light emitting element 41 according to the pixel gray scale of the image frame to be displayed; a third determining module 703, configured to determine, according to the luminance parameter of the light-emitting element 41 corresponding to the dimming area 4a, the luminance parameter of the light received by each grayscale pixel 2a in the dimming area 4 a; a fourth determining module 704, configured to determine a gray scale of each gray scale pixel 2a according to the brightness parameter of the light received by each gray scale pixel 2a and a pixel gray scale of the color pixel P directly facing each gray scale pixel 2 a; the output module 705 is configured to drive the first liquid crystal panel 10 according to the image frame to be displayed, and synchronously drive each gray-scale pixel 2a according to the determined gray scale of each gray-scale pixel 2a, and synchronously drive each light-emitting element 41 according to the determined luminance parameter of each light-emitting element 41.
The modules in the above display driving apparatus may be implemented by software, hardware, or a combination of software and hardware. Each module corresponds to a step of implementing the foregoing display driving method, and specific details may refer to the foregoing embodiments. The modules described above may be implemented, for example, by an Application Specific Integrated Circuit (ASIC) or a Microcontroller (MCU).
Based on the same inventive concept, referring to fig. 8, an embodiment of the present disclosure further provides a display driving apparatus, including a memory 801 and a processor 802, where the memory 801 stores instructions and the processor 802 executes the instructions to perform the foregoing display driving method.
The memory 801 is, for example, a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like. The processor 802 is, for example, a CPU, GPU, TPU, FPGA, NPU, or the like.
The embodiment of the present disclosure further provides a display system, which includes the display module and the display driving device. The display system is, for example, a mobile phone, a tablet computer, a television, or the like.
The embodiments in the disclosure are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The scope of the present disclosure is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present disclosure by those skilled in the art without departing from the scope and spirit of the present disclosure. It is intended that the present disclosure also encompass such modifications and variations as fall within the scope of the claims and their equivalents.

Claims (13)

1. The display panel is characterized by comprising a first liquid crystal panel and a second liquid crystal panel which are arranged in a stacked mode, wherein the first liquid crystal panel is provided with a plurality of color pixels which are arranged in an array mode, the second liquid crystal panel is provided with a plurality of gray-scale pixels which are arranged in an array mode, and each gray-scale pixel is opposite to the plurality of color pixels which are arranged in the array mode.
2. The display panel according to claim 1, wherein each of the gray scale pixels corresponds to a plurality of color pixels having the same size and arranged in a rectangle.
3. The display panel according to claim 1, wherein the first liquid crystal panel comprises a first substrate, a second substrate, and a first liquid crystal layer formed between the first substrate and the second substrate, and wherein the second liquid crystal panel comprises the second substrate, a third substrate, and a second liquid crystal layer formed between the second substrate and the third substrate.
4. A display module comprising a backlight, a first polarizer, a second polarizer and the display panel according to any one of claims 1 to 3, wherein the first polarizer is disposed on a side of the first liquid crystal panel opposite to the second liquid crystal panel, the second polarizer is disposed on a side of the second liquid crystal panel opposite to the first liquid crystal panel, the backlight is provided with a plurality of light emitting elements arranged in an array, the light emitting elements are configured to emit light toward the second polarizer, all the gray-scale pixels are divided into a plurality of dimming regions arranged in an array, each dimming region comprises a plurality of gray-scale pixels arranged in an array, a corner of each dimming region is opposite to one light emitting element, and adjacent corners of adjacent dimming regions share one light emitting element.
5. The display module according to claim 4, wherein a top corner of each of the dimming regions is opposite to a center of one of the light emitting elements.
6. The display module of claim 4, further comprising an optical film disposed between the light emitting element and the second polarizer.
7. A display driving method for driving the display module according to any one of claims 4 to 6, the method comprising:
determining the pixel gray scale of an image frame to be displayed;
determining the brightness parameters of all the light-emitting elements according to the pixel gray scale of the image frame to be displayed;
determining the brightness parameter of the light received by each gray scale pixel in the dimming area according to the brightness parameter of the light-emitting element corresponding to the dimming area;
determining the gray scale of each gray scale pixel according to the brightness parameter of the light received by each gray scale pixel and the pixel gray scale of the color pixel opposite to each gray scale pixel;
and driving the first liquid crystal panel according to the image frame to be displayed, synchronously driving each gray scale pixel according to the determined gray scale of each gray scale pixel, and synchronously driving each light-emitting element according to the determined brightness parameter of each light-emitting element.
8. The method of claim 7, wherein determining the brightness parameter of each light-emitting element according to the gray scale of the pixel of the image frame to be displayed comprises:
determining a rectangular region formed by extending a vertex angle corresponding to a corresponding dimming region of any light-emitting element to a midpoint of a corresponding side in an extending direction of the side of the dimming region adjacent to the vertex angle, and calculating a pixel gray scale mean value in a display region of the image frame to be displayed corresponding to the determined rectangular region;
and mapping the pixel gray-scale mean value corresponding to any one light-emitting element into the brightness level of any one light-emitting element, wherein the brightness parameter comprises the brightness level of the light-emitting element.
9. The method of claim 8, wherein determining the brightness parameter of the light received by each gray-scale pixel in the dimming region according to the brightness parameter of the light-emitting element corresponding to the dimming region comprises:
the brightness level of the light-emitting element corresponding to the brightness of the light received by any gray scale pixel is determined according to the brightness levels of the 4 light-emitting elements corresponding to the dimming area where any gray scale pixel is located and the distance parameters between the 4 light-emitting elements and any gray scale pixel, and the brightness parameter of the light received by each gray scale pixel is calculated according to the brightness level of the light-emitting element.
10. The method of claim 9, wherein determining the gray level of each gray pixel based on the brightness parameter of the light received by each gray pixel and the pixel gray level of the color pixel directly opposite to each gray pixel comprises calculating the gray level of each gray pixel according to the following formula:
Gk＝[Gt*(N-1)]/P(x,y)；
wherein, P(x,y)The gray scale pixel with coordinate (x, y) receives the brightness level of the light emitting element corresponding to the light of the light emitting element, N is the total number of available gray scales of the gray scale pixel, GtThe gray scale is the average gray scale of the color pixel corresponding to the gray scale pixel with the coordinate (x, y) in the image frame to be displayed, and k is a proportionality coefficient.
11. A display driving apparatus, comprising:
the first determining module is used for determining the pixel gray scale of the image frame to be displayed;
the second determining module is used for determining the brightness parameter of each light-emitting element according to the pixel gray scale of the image frame to be displayed;
the third determining module is used for determining the brightness parameter of the light received by each gray scale pixel in the dimming area according to the brightness parameter of the light-emitting element corresponding to the dimming area;
the fourth determining module is used for determining the gray scale of each gray scale pixel according to the brightness parameter of the light received by each gray scale pixel and the pixel gray scale of the color pixel opposite to each gray scale pixel;
and the output module is used for driving the first liquid crystal panel according to the image frame to be displayed, synchronously driving each gray-scale pixel according to the determined gray scale of each gray-scale pixel, and synchronously driving each light-emitting element according to the determined brightness parameter of each light-emitting element.
12. A display driving apparatus comprising a memory storing instructions and a processor executing the instructions to perform the display driving method according to any one of claims 7 to 10.
13. A display system, comprising the display module according to any one of claims 4 to 6 and the display driving device according to claim 11 or 12.
CN202210267623.XA 2022-03-17 2022-03-17 Display panel, display module and system, display driving method and device Active CN114613340B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090051707A1 (en) * 2005-09-30 2009-02-26 Mitsuaki Hirata Liquid Crystal Display Device Drive Method, Liquid Crystal Display Device, and Television Receiver
US20110043549A1 (en) * 2008-04-01 2011-02-24 Koninklijke Philips Electronics N.V. High contrast liquid crystal display with adjustable white color point
CN108877694A (en) * 2018-08-06 2018-11-23 深圳创维－Rgb电子有限公司 A kind of dual-layered liquid crystal screen, backlight brightness control method, device and electronic equipment
CN109960082A (en) * 2019-05-05 2019-07-02 京东方科技集团股份有限公司 Field sequence display module, display device and field sequence display control method
CN110111749A (en) * 2019-06-18 2019-08-09 厦门天马微电子有限公司 A kind of Liquid Crystal Display And Method For Driving
CN111025795A (en) * 2019-12-06 2020-04-17 深圳市华星光电半导体显示技术有限公司 Liquid crystal display device
CN111785222A (en) * 2019-04-04 2020-10-16 海信视像科技股份有限公司 Contrast lifting algorithm and double-panel display device
CN112017604A (en) * 2019-05-31 2020-12-01 京东方科技集团股份有限公司 Driving method, driving device, display device and computer readable storage medium

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090051707A1 (en) * 2005-09-30 2009-02-26 Mitsuaki Hirata Liquid Crystal Display Device Drive Method, Liquid Crystal Display Device, and Television Receiver
US20110043549A1 (en) * 2008-04-01 2011-02-24 Koninklijke Philips Electronics N.V. High contrast liquid crystal display with adjustable white color point
CN108877694A (en) * 2018-08-06 2018-11-23 深圳创维－Rgb电子有限公司 A kind of dual-layered liquid crystal screen, backlight brightness control method, device and electronic equipment
CN111785222A (en) * 2019-04-04 2020-10-16 海信视像科技股份有限公司 Contrast lifting algorithm and double-panel display device
CN109960082A (en) * 2019-05-05 2019-07-02 京东方科技集团股份有限公司 Field sequence display module, display device and field sequence display control method
CN112017604A (en) * 2019-05-31 2020-12-01 京东方科技集团股份有限公司 Driving method, driving device, display device and computer readable storage medium
CN110111749A (en) * 2019-06-18 2019-08-09 厦门天马微电子有限公司 A kind of Liquid Crystal Display And Method For Driving
CN111025795A (en) * 2019-12-06 2020-04-17 深圳市华星光电半导体显示技术有限公司 Liquid crystal display device

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