CN114613340B - Display panel, display module and system, display driving method and device - Google Patents
Display panel, display module and system, display driving method and device Download PDFInfo
- Publication number
- CN114613340B CN114613340B CN202210267623.XA CN202210267623A CN114613340B CN 114613340 B CN114613340 B CN 114613340B CN 202210267623 A CN202210267623 A CN 202210267623A CN 114613340 B CN114613340 B CN 114613340B
- Authority
- CN
- China
- Prior art keywords
- gray
- pixel
- light
- emitting element
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Abstract
The disclosure provides a display panel, a display module, a display 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 pixels which are arranged in an array mode, and each gray pixel is opposite to the plurality of color pixels which are arranged in an array mode. The display panel is beneficial to reducing power consumption, reducing cost, improving display brightness, improving display contrast and reducing operation amount.
Description
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 for 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. Improving the display effect of a liquid crystal display and reducing the power consumption of the liquid crystal display are always technical problems continuously explored by those skilled in the art.
Disclosure of Invention
The disclosure provides a display panel, a display module, a display system, a display driving method and a display driving device.
The first aspect of the present disclosure provides a display panel, including a first liquid crystal panel and a second liquid crystal panel that are stacked, the first liquid crystal panel has a plurality of color pixels arranged in an array, the second liquid crystal panel has a plurality of gray pixels arranged in an array, and each gray pixel is opposite to a plurality of color pixels arranged in an array.
In some embodiments, each of the grayscale pixels corresponds to a plurality of color pixels of the same size and arranged in a rectangle.
In some embodiments, the display panel includes a first substrate, a second substrate, and a third substrate that are stacked, 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.
The second aspect of the present disclosure provides a display module, including a backlight plate, a first polarizer, a second polarizer and a display panel according to 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, a plurality of light emitting elements arranged in an array are disposed on the backlight plate, the light emitting elements are used for emitting light toward the second polarizer, all gray pixels are divided into a plurality of dimming areas arranged in an array, each dimming area includes a plurality of gray pixels arranged in an array, each corner of each dimming area is opposite to one light emitting element, and adjacent corners of adjacent dimming areas share one light emitting element.
In some embodiments, the apex angle of each of the dimming regions is opposite to the 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 the display module of the second aspect of the present disclosure, the method including:
determining the pixel gray scale of an image frame to be displayed;
determining brightness parameters of all the light-emitting elements according to the pixel gray level of the image frame to be displayed;
determining the brightness parameter of the light received by each gray pixel in the dimming area according to the brightness parameter of the light-emitting element corresponding to the dimming area;
determining the gray level of each gray level pixel according to the brightness parameter of the light received by each gray level pixel and the pixel gray level of the color pixel opposite to each gray level pixel;
and driving the first liquid crystal panel according to the image frame to be displayed, synchronously driving each gray pixel according to the determined gray level of each gray 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 area formed by taking a corresponding vertex angle of a corresponding dimming area of any one light-emitting element as a starting point and extending to the midpoint of a corresponding side towards the extending direction of the side of the dimming area adjacent to the vertex angle, and calculating a pixel gray scale average value in a display area of the image frame to be displayed corresponding to the determined rectangular area;
and mapping the pixel gray-scale average value corresponding to any one of the light-emitting elements to the brightness level of the any one of the light-emitting elements, 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 area according to the brightness parameter of the light emitting element corresponding to the dimming area includes:
and determining the brightness level of the light emitting element corresponding to the brightness of the light received by any gray-scale pixel according to the brightness level of 4 light emitting elements corresponding to the dimming area where any gray-scale pixel is positioned and the distance parameter between the 4 light emitting elements and any gray-scale pixel, wherein the brightness parameter of the light received by each gray-scale pixel is calculated according to the brightness level of the light emitting element as a unit.
In some embodiments, determining the gray level of each gray pixel based on the luminance parameter of the light received by said each gray pixel and the pixel gray level of the color pixel opposite to said each gray pixel comprises calculating the gray level of said each gray pixel according to the following formula:
G k ＝[G t *(N-1)]/P (x，y) ；
wherein P is (x，y) The brightness level of the light emitting element corresponding to the light received by the light emitting element is given to the gray pixel with the coordinates of (x, y), N is the total number of available gray scales of the gray pixel, G t The average gray scale of the color pixels corresponding to the gray scale pixels with coordinates of (x, y) in the image frame to be displayed is shown, wherein k is a proportionality coefficient.
A 4 th aspect of the present disclosure provides a display driving apparatus, including: the first determining module is used for determining the pixel gray level 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 level of the image frame to be displayed; a third determining module, configured to determine a luminance parameter of light received by each gray-scale pixel in the dimming area according to a luminance parameter of a light emitting element corresponding to the dimming area; a fourth determining module, configured to determine a gray level of each gray pixel according to a brightness parameter of light received by each gray pixel and a pixel gray level of a color pixel opposite to each gray 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 pixel according to the determined gray level of each gray 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 comprising 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 including the display module of the second aspect of the present disclosure, and a display driving device including the 4 th or 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 division manner of backlight partitions in an embodiment of the present disclosure.
Fig. 3 is a schematic diagram of a division manner of dimming partitions in an embodiment of the present disclosure.
Fig. 4 is a schematic view of luminance distribution of a light emitting element in an embodiment of the present disclosure.
Fig. 5 is a schematic diagram of an image gray scale statistic of color pixels facing each other with gray scale pixel in embodiment 1 of the present disclosure.
Fig. 6 is a flow chart of a display driving method according to an embodiment of the present 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, 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 is further described below with reference to the embodiments shown in the drawings.
In some dual-layer liquid crystal display panels known to the inventors of the present disclosure, one layer of the liquid crystal display panel has color pixels, and the other layer of the liquid crystal display panel has gray scale pixels, which are opposite to each other in one-to-one correspondence with the color pixels. Although the contrast ratio of such a double-layer liquid crystal display panel can be greatly improved, the operation amount and power consumption for driving such a 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, and further increases the power consumption of the backlight source.
Referring to fig. 1 to 5, an embodiment of the present disclosure provides a display panel including a first liquid crystal panel 10 and a second liquid crystal panel 20 stacked together, where the first liquid crystal panel 10 has a plurality of color pixels P arranged in an array, and the second liquid crystal panel 20 has a plurality of gray scale pixels 2a arranged in an array, and each of the gray scale 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 results, for example, in each color pixel P comprising 3 sub-pixels of different colors. And no color film is provided in the second liquid crystal panel 20. The second liquid crystal panel 20 simply plays a role in adjusting brightness.
In most cases, the luminance difference between adjacent pixels in a frame of an image to be displayed is not large. Thus, the brightness of the color pixels P in a smaller area is adjusted by one gray-scale pixel 2a, and a higher display contrast can be provided as in the technical solution known to the present inventors.
On the other hand, since the resolution of the second liquid crystal panel 20 is low, the light transmittance of the second liquid crystal panel 20 is high, which is advantageous for both improving the display brightness and reducing the power consumption.
Further, the resolution of the second liquid crystal panel 20 is low, and the amount of calculation required to determine the gray scale of each gray scale pixel 2a is also greatly reduced, which is also advantageous in reducing power consumption.
In some embodiments, each of the grayscale pixels 2a corresponds to a plurality of color pixels P of the same size and arranged in a rectangle. Of course, the display area may be divided into a middle area and a peripheral area, where the number of color pixels P corresponding to the gray-scale pixels 2a in the middle 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 of the central area of the display may be greater than the accuracy of the brightness adjustment of the peripheral area of the display.
In some embodiments, the display panel includes a first substrate, a second substrate, and a third substrate that 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 film 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 separated independently.
Referring to fig. 1 to 5, the embodiment of the disclosure further provides a display module, including a backlight plate 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 towards the second polarizer.
Specifically, the first polaroid is attached to the light-emitting surface of the first liquid crystal panel, and the second polaroid is attached to the light-entering surface of the second liquid crystal panel.
All the gray pixels 2a are divided into a plurality of dimming areas 4a arranged in an array, each of the dimming areas 4a includes a plurality of the gray pixels 2a arranged in an array, and a corner of each of the dimming areas 4a is opposite to one of the light emitting elements 41, wherein adjacent corners of adjacent dimming areas 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. One light emitting element 41 is provided at the 4-angular position of each dimming area 4a, which enables the light received by each gray-scale pixel 2a within the dimming area 4a to be relatively uniform.
Specifically, the single dimming region 4a corresponds to m×n gray-scale pixels 2a (lateral m, longitudinal n). Thus, the number of light emitting elements 41 required is N, where n=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 gray-scale 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-scale pixels 2a,2073600 color pixels P.
The number of visible light emitting elements 41 and gray scale pixels 2a is very small relative to the number of color pixels P. This greatly reduces the cost of the backlight 40.
In some embodiments, the apex angle of each dimming area 4a faces the center of one of the light emitting elements 41. This design makes it possible to make the subsequent determination of the gray level of each gray pixel 2a easier.
In other embodiments, however, the position of the outermost ring of light-emitting elements 41 is shifted inward relative to the previous embodiments with reference to fig. 2 in order to increase the light utilization of the light-emitting elements 41 to a greater extent.
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, for example, by removing a prism sheet or adding a Brightness Enhancement Film (BEF).
The backlight driving assembly 50 is used for controlling 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 stabilized voltage 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, the method including the following steps.
Step 101, determining the pixel gray scale of the image frame to be displayed.
Specifically, an image frame to be displayed (typically a color image) may be acquired by a display driving device later, and then converted into a grayscale image by the display driving device. Each pixel in the gray image represents the gray level 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 formed by extending the extending direction of the side of the dimming region 4a adjacent to the vertex angle to the midpoint of the corresponding side with the corresponding vertex angle of the dimming region 4a corresponding to any one of the light emitting elements 41 (i.e., the vertex angle of the dimming region 4a closest to the light emitting element 41) as the starting point is determined, and the 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 marked with a thick black solid line at the lower left corner in fig. 2, for the light emitting elements 41 at the 4 corners, the average value of the pixel gray scale in the rectangular region having the apex angle of the dimming region 4a by the light emitting element 41 as the apex angle and half the length and width of the dimming region 4a as the length and width is calculated.
In the previous example, for the light emitting elements 41 at the 4 corners, the end points of the image frame to be displayed need to be calculated as the end points, and the gray scale average of the pixels in the rectangular area with the 1/2 side length of the dimming area 4a as the side length is calculated. Specifically, a pixel gray-scale average of 900 pixels needs to be calculated.
With continued reference to the region marked by the thick black solid line on the left in fig. 2, for the light emitting element 41 on the 4 sides (excluding the light emitting element 41 on the corner described above), the pixel gray-scale average value in the rectangular region having the light emitting element 41 as the midpoint of one side and the adjacent side as 1/2 of the side corresponding to the dimming region 4a is calculated.
Along the previous example, for the light emitting element 41 on 4 sides excluding 4 corners, it is necessary to calculate the pixel gray-scale average value in the rectangular region of the side length of the dimming region 4a extending inward by 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 with the 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.
In the previous example, for the non-edge light emitting element 41, it is necessary to calculate the pixel gray-scale average value in a rectangular region centering on the light emitting element 41. Specifically, a pixel gray-scale average of 3600 pixels needs to be calculated.
Of course, in order to determine how bright each light emitting element 41 needs to emit, the gray-scale average of pixels in a larger range in the image frame to be displayed may also be referred to.
In order to simplify the operation, the result of the pixel gray-scale average value is rounded off, and the part after decimal point is omitted.
Then, the pixel gray-scale average value 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 brightness level of the light emitting element 41 and the pixel gray scale average value is preset, and is determined by a developer after 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 gray-scale average values corresponding to the 4 light emitting elements 41 of one dimming area 4a are 192, 128 in order, the brightness levels mapped to the light emitting elements 41 are 75, 50, and 50 in 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 computation.
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 decay of the light emitted by one light emitting element 41 with distance is determined. The closer a grayscale pixel 2a is to a light emitting element 41, the more intense the light emitted by the light emitting element 41 that the grayscale pixel 2a receives.
Specifically, the luminance level of the light emitting element 41 corresponding to the luminance of the light received by any one gray-scale pixel 2a is determined according to the luminance level of the 4 light emitting elements 41 corresponding to the dimming area 4a where any one gray-scale pixel 2a is located, and the distance parameter between the 4 light emitting elements 41 and any one gray-scale pixel 2a, and the luminance parameter of the light received by each gray-scale 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 a certain gray-scale pixel 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 four corners in one dimming partition reaches the respective gradation pixels 2a (the gradation pixels 2a have not been passed through).
In the embodiment of the present disclosure, the luminance level corresponding to the intensity of light emitted from the surrounding 4 light emitting elements 41 received by one gray-scale pixel 2a is calculated using the following formula:
wherein P (x, y) is the light intensity level received by the gray pixel 2a at the coordinates (x, y), P l1 To P l4 The brightness levels of light emitted from the light emitting elements 41 at the four corners of the dimming area 4a are respectively, m is the number of gray-scale pixels 2a in the horizontal direction within one dimming area 4a, and n is the number of gray-scale pixels 2a in the vertical direction within one dimming area 4 a.
Referring to fig. 3, one dimming area 4a in this embodiment includes 900 gray scale pixels 2a arranged in a 30×30 array. The former example, that is, assuming that the luminance levels of the light emitting elements 41 at the four corners of one dimming area 4a are 75, 50, and 50 in this order, the luminance level of the light received by the gradation pixel 2a at the position of coordinates (15, 15) is:
P(15，15)＝{75*[1-(14 2 +14 2 )/(30 2 +30 2 )]+75*[1-(15 2 +14 2 )/(30 2 +30 2 )]+50*(1-(14 2 +15 2 )/(30 2 +30 2 ))+50*(1-(15 2 +15 2 )/(30 2 +30 2 )]}/4＝47.81≈48。
step 104, determining the gray level of each gray pixel 2a according to the brightness parameter of the light received by each gray pixel 2a and the pixel gray level of the color pixel P opposite to each gray pixel 2a.
Specifically, the gray scale of each gray pixel 2a is calculated according to the following formula:
G k ＝[G t *(N-1)]/P (x，y) ；
wherein P is (x，y) The brightness level of the light emitting element 41 corresponding to the light received by the light emitting element 41 for the gray scale pixel 2a with coordinates of (x, y), N is the total number of available gray scales of the gray scale pixel 2a, and the minimum gray scale of the gray scale pixel 2a is 0,G t The average gray level of the color pixel P corresponding to the gray level pixel 2a with coordinates of (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 scale pixel 2a is averaged, and the result is denoted as G t . In the example shown in FIG. 5, G t ＝51。
Step 105, driving the first liquid crystal panel 10 according to the image frame to be displayed, 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, when displaying each frame of image, the luminance of the light emitting element 41 and the transmittance of the gradation pixel 2a need to be adjusted in synchronization. The above 3 actions may be synchronized with a frame synchronization signal.
The above display driving method is based on the display module described above, and the number of gray-scale pixels 2a and light-emitting elements 41 is small, and the operation amount is very low.
The calculation amount is further reduced because the brightness of the light is measured by adopting the brightness level.
Based on the same inventive concept, referring to fig. 7, an embodiment of the present disclosure further provides a display driving apparatus including: a first determining module 701, configured to determine a pixel gray level of an image frame to be displayed; a second determining module 702, configured to determine a brightness parameter of each light emitting element 41 according to the pixel gray level of the image frame to be displayed; a third determining module 703, configured to determine a luminance parameter of the light received by each gray-scale pixel 2a in the dimming area 4a according to the luminance parameter of the light emitting element 41 corresponding to the dimming area 4 a; a fourth determining module 704, configured to determine a gray level of each gray pixel 2a according to a brightness parameter of the light received by each gray pixel 2a and a pixel gray level of the color pixel P opposite to each gray pixel 2 a; an output module 705, configured to drive the first liquid crystal panel 10 according to the image frame to be displayed, 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 brightness parameter of each light-emitting element 41.
The modules in the display driving device can be realized by software, hardware or a combination of the software and the hardware. The steps of the display driving method are correspondingly implemented by the modules, and specific details can be referred to the foregoing embodiments. The modules described above may be implemented, for example, by an Application Specific Integrated Circuit (ASIC) or Microcontroller (MCU) or the like.
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, the memory 801 storing instructions, the processor 802 executing the instructions to perform the aforementioned 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, CPU, GPU, TPU, FPGA, NPU or the like.
The embodiment of the disclosure also provides a display system, which comprises 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 various embodiments in this disclosure are described in a progressive manner, and identical and similar parts of the various embodiments are all referred to each other, and each embodiment is mainly described as different from 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 disclosure. Such modifications and variations are intended to be included herein within the scope of the following claims and their equivalents.
Claims (10)
1. The display module is characterized by comprising a backlight plate, a first polaroid, a second polaroid and a display panel, wherein the first polaroid is arranged on one side of a first liquid crystal panel, which is opposite to a second liquid crystal panel, the second polaroid is arranged on one side of the second liquid crystal panel, which is opposite to the first liquid crystal panel, a plurality of light-emitting elements which are arranged in an array manner are arranged on the backlight plate and are used for emitting light towards the second polaroid, all gray pixels are divided into a plurality of dimming areas which are arranged in an array manner, each dimming area comprises a plurality of gray pixels which are arranged in an array manner, and the corner of each dimming area is opposite to one light-emitting element, wherein the adjacent corner of each adjacent dimming area shares one light-emitting element;
wherein, the display panel includes: the first liquid crystal display device comprises a first liquid crystal panel and a second liquid crystal panel which are stacked, 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 pixels which are arranged in an array mode, and each gray pixel is opposite to the plurality of color pixels which are arranged in an array mode.
2. The display module of claim 1, wherein a vertex angle of each of the dimming regions is opposite to a center of one of the light emitting elements.
3. The display module of claim 1, further comprising an optical film disposed between the light emitting element and the second polarizer.
4. A display driving method for driving the display module according to any one of claims 1 to 3, the method comprising:
determining the pixel gray scale of an image frame to be displayed;
determining brightness parameters of all the light-emitting elements according to the pixel gray level of the image frame to be displayed;
determining the brightness parameter of the light received by each gray pixel in the dimming area according to the brightness parameter of the light-emitting element corresponding to the dimming area;
determining the gray level of each gray level pixel according to the brightness parameter of the light received by each gray level pixel and the pixel gray level of the color pixel opposite to each gray level pixel;
and driving the first liquid crystal panel according to the image frame to be displayed, synchronously driving each gray pixel according to the determined gray level of each gray pixel, and synchronously driving each light emitting element according to the determined brightness parameter of each light emitting element.
5. The method of claim 4, wherein determining the brightness parameter of each light-emitting element according to the pixel gray scale of the image frame to be displayed comprises:
determining a rectangular area formed by taking a corresponding vertex angle of a corresponding dimming area of any one light-emitting element as a starting point and extending to the midpoint of a corresponding side towards the extending direction of the side of the dimming area adjacent to the vertex angle, and calculating a pixel gray scale average value in a display area of the image frame to be displayed corresponding to the determined rectangular area;
and mapping the pixel gray-scale average value corresponding to any one of the light-emitting elements to the brightness level of the any one of the light-emitting elements, wherein the brightness parameter comprises the brightness level of the light-emitting element.
6. The method of claim 5, wherein 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 comprises:
and determining the brightness level of the light emitting element corresponding to the brightness of the light received by any gray-scale pixel according to the brightness level of 4 light emitting elements corresponding to the dimming area where any gray-scale pixel is positioned and the distance parameter between the 4 light emitting elements and any gray-scale pixel, wherein the brightness parameter of the light received by each gray-scale pixel is calculated according to the brightness level of the light emitting element as a unit.
7. The method of claim 6, wherein determining the gray level of each gray pixel based on the luminance parameter of the light received by the each gray pixel and the pixel gray level of the color pixel opposite to the each gray pixel comprises calculating the gray level of each gray pixel according to the following formula:
G k ＝[G t *(N-1)]/P (，) ；
wherein P is (，) The brightness level of the light emitting element corresponding to the light received by the light emitting element is given to the gray pixel with the coordinates of (x, y), N is the total number of available gray scales of the gray pixel, G t The average gray scale of the color pixels corresponding to the gray scale pixels with coordinates of (x, y) in the image frame to be displayed is given, and k is a proportionality coefficient.
8. A display driving apparatus, comprising:
the first determining module is used for determining the pixel gray level 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 level of the image frame to be displayed;
a third determining module, configured to determine a luminance parameter of light received by each gray-scale pixel in a dimming area according to a luminance parameter of a light emitting element corresponding to the dimming area;
a fourth determining module, configured to determine a gray level of each gray pixel according to a brightness parameter of light received by each gray pixel and a pixel gray level of a color pixel opposite to each gray 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 pixel according to the determined gray level of each gray pixel, and synchronously driving each light emitting element according to the determined brightness parameter of each light emitting element.
9. A display driving device comprising a memory and a processor, the memory storing instructions that are executed by the processor to perform the display driving method according to any one of claims 4 to 7.
10. A display system comprising the display module according to any one of claims 1 to 3 and the display driving device according to claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210267623.XA CN114613340B (en) | 2022-03-17 | 2022-03-17 | Display panel, display module and system, display driving method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210267623.XA CN114613340B (en) | 2022-03-17 | 2022-03-17 | Display panel, display module and system, display driving method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114613340A CN114613340A (en) | 2022-06-10 |
| CN114613340B true CN114613340B (en) | 2023-08-08 |
Family
ID=81865897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210267623.XA Active CN114613340B (en) | 2022-03-17 | 2022-03-17 | Display panel, display module and system, display driving method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114613340B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8451201B2 (en) * | 2005-09-30 | 2013-05-28 | Sharp Kabushiki Kaisha | Liquid crystal display device drive method, liquid crystal display device, and television receiver |
| WO2009122329A1 (en) * | 2008-04-01 | 2009-10-08 | Koninklijke Philips Electronics N. V. | High contrast liquid crystal display with adjustable white color point |
| CN108877694B (en) * | 2018-08-06 | 2021-08-31 | 深圳创维－Rgb电子有限公司 | Double-layer liquid crystal screen, backlight brightness control method and device and electronic equipment |
| CN111785222B (en) * | 2019-04-04 | 2021-05-28 | 海信视像科技股份有限公司 | Contrast lifting algorithm and double-panel display device |
| CN109960082B (en) * | 2019-05-05 | 2022-06-07 | 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 |
| CN112017604B (en) * | 2019-05-31 | 2022-07-08 | 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 |
| CN111025795B (en) * | 2019-12-06 | 2021-03-23 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display device |
-
2022
- 2022-03-17 CN CN202210267623.XA patent/CN114613340B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114613340A (en) | 2022-06-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10984736B2 (en) | Image display processing method and device thereof, display device and storage medium | |
| KR101425956B1 (en) | Surface light source device and liquid crystal display unit | |
| CN110136657B (en) | Backlight value and compensation value acquisition method and display device | |
| WO2020224314A1 (en) | Field sequential display module, display device and control method for field sequential display module | |
| CN102074212B (en) | Method of compensating for pixel data and liquid crystal display | |
| WO2019210641A1 (en) | Method for eliminating backlight mura | |
| KR102073065B1 (en) | Liquid crystal display and method for driving the same | |
| JP2008003220A5 (en) | ||
| JP2007328345A (en) | Display device and integrated circuit chip mounted thereon | |
| CN107204174B (en) | Liquid crystal display panel and its driving method, liquid crystal display | |
| US20210341795A1 (en) | Display device and display method of display device | |
| KR20090049550A (en) | Planar light source device and liquid crystal display device assembly | |
| WO2017199642A1 (en) | Backlight device and display device using same | |
| US20110234478A1 (en) | Liquid crystal display device | |
| JP6749824B2 (en) | Display device and lighting device | |
| CN114613340B (en) | Display panel, display module and system, display driving method and device | |
| WO2013073428A1 (en) | Display device | |
| WO2013108646A1 (en) | Display device | |
| JP2008140653A (en) | Surface light source device and liquid crystal display device assembly | |
| JP5642133B2 (en) | Image display device, image display method, and device for controlling image display device | |
| WO2022133920A1 (en) | Image display method and apparatus, and storage medium | |
| KR20110054095A (en) | Display device and method for driving the same | |
| KR101728349B1 (en) | Liquid crystal display device for dual display | |
| JP4631805B2 (en) | Surface light source device | |
| KR20040061281A (en) | Liquid crystal display device for adjusting brightness |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |