CN111028810B - Display method of display device - Google Patents

Display method of display device Download PDF

Info

Publication number
CN111028810B
CN111028810B CN201911355218.8A CN201911355218A CN111028810B CN 111028810 B CN111028810 B CN 111028810B CN 201911355218 A CN201911355218 A CN 201911355218A CN 111028810 B CN111028810 B CN 111028810B
Authority
CN
China
Prior art keywords
display
standard
gray
scale value
backlight
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
Application number
CN201911355218.8A
Other languages
Chinese (zh)
Other versions
CN111028810A (en
Inventor
陈宇
丁雪融
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhu Tianma Automotive Electronics Co ltd
Original Assignee
Shanghai Tianma Microelectronics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Tianma Microelectronics Co Ltd filed Critical Shanghai Tianma Microelectronics Co Ltd
Priority to CN201911355218.8A priority Critical patent/CN111028810B/en
Publication of CN111028810A publication Critical patent/CN111028810A/en
Application granted granted Critical
Publication of CN111028810B publication Critical patent/CN111028810B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources

Abstract

The invention discloses a display method of a display device, belonging to the technical field of display, wherein the display device comprises a backlight module and a first display panel which are oppositely arranged; the backlight module comprises M backlight gray scale values when emitting light, wherein M is 2m(ii) a The first display panel comprises N display gray-scale values, wherein N is 2n(ii) a Pre-storing a standard table, wherein the standard table comprises B standard gray scale values, and B is 2b(ii) a The display method comprises the following steps: knowing an image to be displayed and a standard gray-scale value of each first pixel corresponding to the image; searching standard display data corresponding to the standard gray scale value of the image from the standard table; obtaining a backlight gray scale value when the backlight module corresponding to the standard display data emits light and a display gray scale value when the first display panel displays the light; the external driving circuit drives the display device to display an image. The invention can realize the display of the image with high numerical value bits by the source electrode drive IC with low numerical value bits, and simultaneously realize the effects of saving cost and improving display quality.

Description

Display method of display device
Technical Field
The invention relates to the technical field of display, in particular to a display method of a display device.
Background
In the conventional display device, the display panel is mainly divided into two mainstream technologies of a liquid crystal display panel and an organic self-luminous display panel. The liquid crystal display panel forms an electric field capable of controlling the deflection of liquid crystal molecules by providing proper voltage to the pixel electrode and the common electrode, and further controls the transmission of light rays to realize the display function of the display panel; the organic self-luminous display panel adopts an organic electroluminescent material, and when current passes through the organic electroluminescent material, the luminescent material can emit light, so that the display function of the display panel is realized. Liquid Crystal Display (LCD) devices are widely used in televisions, notebook computers, mobile phones, etc. because of their advantages of thin and light profile, low power consumption, and no radiation pollution. The liquid crystal display screen can not self-illuminate, and is a passive illuminating element, and mainly uses a backlight module below the liquid crystal display screen to provide a light source, the backlight source and the liquid crystal display screen are combined together to form a liquid crystal display module, the backlight module is one of key components of a liquid crystal display panel, and has the function of supplying sufficient light source with uniform brightness and distribution, so that the liquid crystal display panel can normally display images. The liquid crystal display includes a plurality of source drive Integrated Circuits (ICs) supplying data voltages to data lines of a liquid crystal display panel, and a plurality of gate drive integrated circuits sequentially supplying gate pulses (i.e., scan pulses) to gate lines of the liquid crystal display panel, and the liquid crystal display panel may be formed of a plurality of pixels, each of which may be defined with intersections of a plurality of gate lines (for selecting the gates of the pixels) and a plurality of source lines (for transmitting color data such as gray data). The source driver integrated circuit supplies display information in the form of a voltage to each pixel, and the gate driver integrated circuit may apply a control signal to the gate lines and supply color data to the source lines to vary the light transmittance of the pixels according to the display information, and finally display an image on the display panel.
The majority of the images we are currently primarily exposed to are 24bit or 32bit color depth, which is equal to R, G, B of 8bit per channel or the addition of 8bit r, G, B, a color channels per channel, where the number of bits of the display 10bit and 8bit represents a gamut or vividness that is not a color, which refers to a gradation of color, 8bit means that each primary color has 256 shades of gray, i.e., 0-255 for gray levels of color from black to white, 10bit means that each primary color has 1024 shades of gray, meaning that the monochrome color channel has 1024 shades of gray, and the range of shades is 0-1023. The more gray scale levels, the finer the color, the more uniform the color transition, with 8 bits providing 256 sampling points and 10 bits providing 1024 sampling points, with the color precision 4 times that of 8 bits.
At present, a 10-bit source electrode driving IC is needed for a conventional 10-bit display screen, but the source electrode driving ICs of 8 bits are used for some small-size display screens such as a vehicle-mounted display screen at present, the cost of the 10-bit source electrode driving IC is high, the selectivity is low at present, and the version of the vehicle-mounted display screen is not met.
Therefore, it is an urgent technical problem for those skilled in the art to provide a display method of a display device that can display an image with a high number of bits by using a source driver IC with a low number of bits, and achieve the effects of saving cost and improving display quality.
Disclosure of Invention
In view of the above, the present invention provides a display method of a display device, so as to solve the problems of high cost and low selectivity of the high quality display image that needs to be implemented by a high cost source driver IC in the prior art.
The invention provides a display method of a display device, wherein the display device comprises: the backlight module and the first display panel are oppositely arranged; the first display panel is positioned on one side of the light-emitting surface of the backlight module, and the backlight module comprises a plurality of light-emitting areas which are arranged in an array; the first display panel comprises a plurality of first pixels arranged in an array; in the same area of the display device, the number of the luminous areas is A, the number of the first pixels is B, wherein B/A is less than 50; the backlight module comprises M backlight gray scale values when emitting light, each backlight gray scale value corresponds to one backlight data, and M is 2m(ii) a The first display panel comprises N display gray-scale values when displaying, each display gray-scale value corresponds to one display data, and N is 2n(ii) a Wherein m is more than or equal to 0, n is more than or equal to 0, and m and n are integers; prestoring a standard table, wherein the standard table comprises B standard gray-scale values, each standard gray-scale value corresponds to one standard display data, and B is 2b(ii) a Wherein b > m, b > n, and b is an integer; the display method comprises the following steps: knowing an image to be displayed and a standard gray-scale value of each first pixel corresponding to the image; searching standard display data corresponding to the standard gray scale value of the image from the standard table; obtaining a backlight gray scale value when the backlight module corresponding to the standard display data emits light and a display gray scale value when the first display panel displays the light; and the external driving circuit drives the display device to display images according to the obtained backlight gray-scale value when the backlight module emits light and the display gray-scale value when the first display panel displays.
Compared with the prior art, the display method of the display device provided by the invention at least realizes the following beneficial effects:
the backlight module comprises a plurality of luminous areas which are arranged in an array, can realize the Local Dimming function of the backlight module through the Local Dimming technology, improve the dynamic contrast ratio, realize energy conservation, greatly reduce the electric quantity, improve the contrast value and the gray scale number of a display picture, reduce the ghost shadow and the like. In the display method of the display device, when an image to be displayed is known, a standard gray-scale value of each first pixel corresponding to the image can be obtained; the standard display data corresponding to each standard gray scale value of the known image is searched from the standard table, then the backlight gray scale value when the backlight module corresponding to the standard display data emits light and the display gray scale value when the first display panel displays are obtained, and finally the external driving circuit drives the display device to display the image according to the obtained backlight gray scale value when the backlight module emits light and the display gray scale value when the first display panel displays, so that the combination of the 8-bit backlight module and the 8-bit first display panel is realized, and the 10-bit display effect of the display device is realized.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic plan view of a display device according to an embodiment of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A' of FIG. 1;
fig. 3 is a schematic block diagram of a display method of a display device according to an embodiment of the present invention;
FIG. 4 is a schematic block diagram illustrating a flow chart of another display method of the display device according to the embodiment of the invention;
FIG. 5 is a diagram illustrating a luminance response curve of a general display device;
FIG. 6 is a graphical representation of the response curve and reference index curve of FIG. 5 after normalization;
FIG. 7 is a schematic block diagram illustrating a flow chart of another display method of the display device according to the embodiment of the invention;
FIG. 8 is a schematic workflow block diagram provided by an embodiment of the invention;
fig. 9 is another sectional view taken along line a-a' of fig. 1.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1 to fig. 3, fig. 1 is a schematic plan view of a display device according to an embodiment of the present invention, fig. 2 is a schematic sectional view taken along a direction a-a' of fig. 1, fig. 3 is a schematic flow chart of a display method of the display device according to the embodiment of the present invention, and the display method of the display device according to the embodiment of the present invention is applied to the following display device 111; the display device 111 includes: the backlight module 100 and the first display panel 200 are oppositely arranged;
the first display panel 200 is located at one side of the light emitting surface E of the backlight module 100, and the backlight module 100 includes a plurality of light emitting areas 101 arranged in an array; the first display panel 200 includes a plurality of first pixels 201 arranged in an array;
in one same region G of the display device 111, the number of the light emitting regions 101 is A, the number of the first pixels 201 is B, wherein B/A < 50;
backlight module 100 light-emitting bagIncluding M backlight gray scale values, each backlight gray scale value corresponding to one backlight data, M2m(ii) a The first display panel 200 includes N display gray-scale values, each display gray-scale value corresponds to one display data, and N is 2n(ii) a Wherein m is more than or equal to 0, n is more than or equal to 0, and m and n are integers;
prestoring a standard table, wherein the standard table comprises B standard gray-scale values, each standard gray-scale value corresponds to one standard display data, and B is 2b(ii) a Wherein b > m, b > n, and b is an integer;
the display method comprises the following steps:
step 001: knowing the image to be displayed and the standard gray-scale value of each first pixel 201 corresponding to the image;
step 002: searching standard display data corresponding to the standard gray scale value of the image from the standard table;
step 003: obtaining a backlight gray scale value when the backlight module 100 emits light corresponding to the standard display data and a display gray scale value when the first display panel 200 displays the light;
step 004: the external driving circuit drives the display device to display an image according to the obtained backlight gray-scale value when the backlight module 100 emits light and the obtained display gray-scale value when the first display panel 200 displays the image.
Specifically, in the display device 111 of the present embodiment, the backlight module 100 includes a plurality of light emitting areas 101 arranged in an array, and the backlight module 100 can implement a Local Dimming function of the backlight module 100 through a Local Dimming technology. Local Dimming (Local backlight adjustment) uses a backlight composed of hundreds of light sources to replace a cold cathode backlight, the brightness of the backlight light source can be adjusted according to the brightness of an image, the brightness of a high-brightness part in the displayed image can be maximized, and meanwhile, the brightness of a dark part can be reduced or even closed to achieve the optimal contrast, so that the reduction of the brightness of a dark part reduces the power consumption of the backlight. Especially, the direct type backlight module is matched with a Local Dimming technology, generally, the backlight module of the liquid crystal display panel is subjected to partition processing, brightness analysis is performed on each partition according to the brightness of an image signal, and a driving chip (not shown) of the backlight module 100 is controlled according to an analysis result to drive each light emitting region 101 in the backlight module 100, so that the purpose of performing real-time brightness adjustment on the backlight is achieved, bright areas are brighter, dark places are darker, dynamic contrast is improved, energy saving is achieved, electric quantity can be greatly reduced, a display picture contrast value and a gray scale number are improved, residual images are reduced, and the like.
In the display method of the display device 111 provided in this embodiment, the backlight module 100 includes M backlight gray-scale values when emitting light, each backlight gray-scale value corresponds to one backlight data, and M is 2m(ii) a The first display panel 200 includes N display gray-scale values, each display gray-scale value corresponds to one display data, and N is 2n(ii) a Wherein m is more than or equal to 0, n is more than or equal to 0, and m and n are integers; optionally, m and n may be integers greater than or equal to 8, and m and n may be equal or unequal, where m is the number of bits of the backlight module 100, and n is the number of bits of the first display panel 200. Prestoring a standard table, wherein the standard table comprises B standard gray-scale values, each standard gray-scale value corresponds to one standard display data, and B is 2b(ii) a Wherein b > m, b > n, and b is an integer; optionally, b is an integer greater than 8, and b is the number of bits of the display screen to be reached by the display device 111.
For example, taking m as 8, n as 8, and b as 10 as an example, the backlight module 100 is driven by using 8-bit driving chips, 8bit indicates that each primary color has 256 gray levels, and the achievable luminance level is the gray level from black to white corresponding to 0-255, the first display panel 200 is driven by using 8-bit source driving chips, and the achievable luminance level is also the gray level from black to white corresponding to 0-255, the display method of the present embodiment can achieve the 10-bit display effect of the display device 111 by using the backlight module 100 and the first display panel 200, that is, each primary color of the final display device 111 has 1024 gray levels, the monochrome color channel has 1024 gray levels, and the color gradation range is 0-1023. Specifically, the backlight module 100 includes 256 backlight gray-scale values during light emission, each backlight gray-scale value corresponds to one backlight data, and M is 256 is 28(ii) a The first display panel 200 includes 256 display gray-scale values, each display gray-scale value corresponds to one display data, and N-256-28(ii) a Prestored standard tableOne, the standard table one includes 1024 standard gray-scale values, each standard gray-scale value corresponds to one standard display data, and B is 1024 or 210(ii) a The standard table one is as follows:
Gray LV
0 0
1 0.0003
2 0.0015
3 0.0035
4 0.0067
5 0.0109
6 0.0163
7 0.0228
8 0.0306
9 0.0397
…… ……
1019 1310.6546
1020 1313.4860
1021 1316.3206
1022 1319.1587
1023 1322.0000
the first standard table is display data corresponding to each display Gray scale value for the display device 111 to achieve a display effect of 10 bits, Gray in the first standard table represents a standard display Gray scale value, and LV represents that each standard display Gray scale value corresponds to one standard display data. When the image to be displayed is known, the standard gray-scale value of each first pixel 201 corresponding to the image can be obtained; searching standard display data LV corresponding to each standard Gray-scale value Gray of the known image from the first standard table; obtaining a backlight gray scale value when the backlight module 100 corresponding to the standard display data LV is emitting light and a display gray scale value when the first display panel 200 displays the backlight gray scale value; the external driving circuit (which may be a driving IC) drives the display device 111 to display an image according to the obtained backlight gray-scale value when the backlight module 100 emits light and the obtained display gray-scale value when the first display panel 200 displays; therefore, the combination of the backlight module 100 with 8 bits and the first display panel 200 with 8 bits is realized, so as to realize the 10-bit display effect of the display device 111, that is, the display method of the display device 111 of the embodiment can realize the display of the image with high numerical bit through the source driver IC with low numerical bit, and simultaneously realize the effects of saving cost and improving display quality.
It should be noted that, in the display method of this embodiment, there are various methods for searching the standard display data LV corresponding to each standard Gray-scale value Gray of the known image from the standard table one, and then obtaining the backlight Gray-scale value when the backlight module 100 corresponding to the standard display data LV emits light and the display Gray-scale value when the first display panel 200 displays the backlight Gray-scale value, and the method may be obtained by calculation with a calculation algorithm or by other methods. In addition, in the present embodiment, in a same area G of the display device 111, the number of the light emitting areas 101 is a, the number of the first pixels 201 is B, wherein B/a is less than 50, and the display method of the display device is suitable for a case that the ratio of the resolution of the first display panel 200 to the number of the partitions of the backlight module 100 is less than 50:1, that is, in the same area G of the display device 111, the ratio of the number of the first pixels 201 of the first display panel 200 to the number of the light emitting areas 101 of the backlight module 100 is less than 50, and the smaller the ratio, the better the display effect. In this embodiment, only the backlight module 100 with 8 bits is combined with the first display panel 200 with 8 bits to achieve the 10-bit display effect of the display device 111, which is taken as an example to illustrate the technical solution of this embodiment, and may also be a technical solution for achieving displaying of an image with a high numerical bit by using other source driver ICs with a low numerical bit.
It is understood that fig. 2 of the present embodiment only shows the structures of the first display panel 200 and the backlight module 100 by way of example, but is not limited to this structure, and may also include other structures capable of implementing a display function, such as an upper polarizer and a lower polarizer located on the upper surface and the lower surface of the first display panel 200, which can be understood according to the structures of the liquid crystal display device in the related art, and the description of the present embodiment is not repeated herein.
Optionally, the backlight module 100 is a direct-type backlight module, each light emitting region 101 includes a plurality of LED beads 1000, where the LED beads 1000 may be any one of mini LED beads or micro LED beads, and when the mini LED beads are selected as the light source of the backlight module 100 in the embodiment, the mini LEDs may be arranged in an array on a substrate (not shown in the figure) of the backlight module 100, so that the backlight module 100 becomes a direct-type backlight source. The mini LED is also called a sub-millimeter light emitting diode, and means an LED having a grain size of about 100 to 1000 micrometers, when the mini LED is used to form the LED provided in this embodiment, the yield is High, and the LED has a special-shaped cutting characteristic, and a High-curved backlight form can be formed by matching with a flexible substrate, and the LED has better color rendering properties, and when the backlight module 100 is applied to the first display panel 200, the LED can provide more precise HDR (High Dynamic Range, High Dynamic Range image) partitions for the first display panel 200, and the backlight module has a plurality of Dynamic partitions, faster dimming response speed, higher control accuracy, and can greatly increase the speed of backlight response of the Dynamic partitions and the brightness of each partition, and also can reduce the thickness of the backlight module. In some optional embodiments, a micro LED may be further selected as the light source of the backlight module 100 in this embodiment, the micro LED is an LED with a grain size of about 1-10 μm, and has a self-luminous display characteristic, and advantages of the micro LED include an all-solid state, a long lifetime, a high brightness, a low power consumption, a small volume, an ultra-high resolution, being applicable to extreme environments such as high temperature or radiation, and being capable of realizing a display screen with pixel particles of 0.05 mm or less, and the micro LED has a very low power consumption, and has a good material stability and no image residue.
In some optional embodiments, please refer to fig. 1, fig. 2, and fig. 4 in combination, where fig. 4 is a schematic flow chart of another display method of a display device according to an embodiment of the present invention, in which the display method of the display device provided in this embodiment, in step 002: after searching for the standard display data corresponding to the standard gray scale value of the image from the standard table, step 003 is specifically to obtain the backlight gray scale value when the backlight module corresponding to the standard display data is emitting light and the display gray scale value when the first display panel displays through a table look-up method;
the backlight module 100 comprises M backlight gray scale values when emitting light, each backlight gray scale value corresponds to one backlightData, M ═ 2m(ii) a The first display panel 200 includes N display gray-scale values, each display gray-scale value corresponds to one display data, and N is 2n(ii) a Wherein m is more than or equal to 0, n is more than or equal to 0, and m and n are integers;
prestoring a standard table, wherein the standard table comprises B standard gray-scale values, each standard gray-scale value corresponds to one standard display data, and B is 2b(ii) a Wherein b > m, b > n, and b is an integer;
the table lookup method comprises the following steps:
prestoring a lookup table, wherein the lookup table comprises a pieces of display data, and a is M × N, and the a pieces of display data of the lookup table are formed by combining M pieces of backlight data of the backlight module 100 and N pieces of gray scale data of the first display panel 200;
searching standard display data LV corresponding to a standard gray-scale value of the image from the standard table;
searching display data LV0 corresponding to the standard display data LV from a lookup table, wherein the display data LV0 corresponds to a backlight gray-scale value X of the backlight module 100 and a display gray-scale value Y of the first display panel 200;
the external driving circuit controls the backlight module 100 to emit light with a backlight gray scale value of X, so that the first display panel 200 displays an image with a display gray scale value of Y.
As shown in fig. 4, the display method of the present embodiment includes:
step 001: knowing the image to be displayed and the standard gray-scale value of each first pixel 201 corresponding to the image;
step 002: searching standard display data LV corresponding to a standard gray-scale value of the image from the standard table;
step 003: searching display data LV0 corresponding to the standard display data LV from a lookup table, wherein the display data LV0 corresponds to a backlight gray-scale value X of a backlight module and a display gray-scale value Y of a first display panel;
step 004: the external driving circuit controls the backlight module 100 to emit light with a backlight gray scale value of X, so that the first display panel 200 displays an image with a display gray scale value of Y.
Specifically, the present embodimentTaking m as 8, n as 8, and b as 10 as an example, the backlight module 100 is driven by an 8-bit driving chip, 8bit indicates that each primary color has 256 gray levels, and the luminance gradation that can be realized is the gray level from black to white corresponding to 0-255, the first display panel 200 is driven by an 8-bit source driving chip, and the luminance gradation that can be realized is the gray level from black to white corresponding to 0-255, the display method of the embodiment can realize the 10-bit display effect of the display device 111 by using the backlight module 100 and the first display panel 200, that is, each primary color of the final display device 111 has 1024 gray levels, the monochrome color channel has 1024 gray levels, and the range of the gray levels is 0-1023. Specifically, the backlight module 100 includes 256 backlight gray-scale values during light emission, each backlight gray-scale value corresponds to one backlight data, and M is 256 is 28(ii) a The first display panel 200 includes 256 display gray-scale values, each display gray-scale value corresponds to one display data, and N-256-28(ii) a Prestoring a standard table I, wherein the standard table I comprises 1024 standard gray-scale values, each standard gray-scale value corresponds to one standard display data, and B is 1024 or 210(ii) a The standard table one is as shown in the above embodiments. The first standard table is display data corresponding to each display Gray scale value for the display device 111 to achieve a display effect of 10 bits, Gray in the first standard table represents a standard display Gray scale value, and LV represents that each standard display Gray scale value corresponds to one standard display data. When the image to be displayed is known, the standard gray-scale value of each first pixel 201 corresponding to the image can be obtained; prestoring a first lookup table, wherein the first lookup table comprises 65536 display data, a is M × N is 256 × 256 is 65536, and 65536 display data of the first lookup table are formed by combining 256 backlight data of the backlight module 100 and 256 gray scale data of the first display panel 200;
the look-up table one is as follows:
Figure BDA0002335723820000111
the first lookup table is driven by the backlight module 100 using 8-bit driving chip, and the first display panel 200 uses 8-bit driving energy of the source driving chip65536 display data LV0 can be combined, Gray in the first lookup table represents 256 backlight Gray-scale values driven by the backlight module 100 using 8-bit driving chip, the brightness level of the Gray-scale values can be from black to white corresponding to 0-255, and PWM in the first lookup tableReg256 display gray scale values which represent that the first display panel 200 is driven by using the source driving chip with 8 bits, and the achievable brightness gradation is also the gray scale level from black to white corresponding to 0-255; that is, 2 of the lookup table one can be obtained by testing and calculation16Individual display data LV 0: the 0-255 display gray scale and 0-255 backlight brightness combination table can achieve the display effect of 10 bits or more by displaying the gray scale and backlight brightness combination. Searching standard display data LV corresponding to a standard gray-scale value of the image from the first standard table; searching display data LV0 corresponding to the standard display data LV from a first lookup table, wherein the display data LV0 corresponds to a backlight gray-scale value X of a backlight module and a display gray-scale value Y of a first display panel; the external driving circuit (which may be a driving IC) controls the backlight module 100 to emit light with a backlight gray scale value X, so that the first display panel 200 displays an image with a display gray scale value Y.
For example, the standard display data corresponding to a standard gray scale value 2 of the image is 0.0015, the display data 0.0017 corresponding to the standard display data 0.0015 is searched from the first lookup table, and the display data 0.0017 corresponds to a backlight gray scale value 4 of the backlight module 100 and a display gray scale value 3 of the first display panel 200; the external driving circuit controls the backlight gray scale value of the light emitted from the backlight module 100 to be 4, so that the display gray scale value displayed by the first display panel 200 is 3, and the display effect of the 10-bit high-quality display picture of the display device 111 can be realized by combining the 8-bit backlight module 100 and the 8-bit first display panel 200. That is, the display method of the display device 111 of this embodiment is to display the image with the high-value bit by the source driver IC with the low-value bit in the manner of a lookup table by pre-storing the standard table and the lookup table, and meanwhile, to achieve the effects of saving the cost and improving the display quality.
It should be noted that, in this embodiment, the standard display number is looked up from the lookup tableAccording to the display data LV0 corresponding to the LV, specifically: the value of LV0 is equal to the value of LV. Ideally, the display data LV0 equal to the standard display data LV in the standard table can be found from the lookup table, but due to the existence of the insurmountable error, the standard display data corresponding to one standard gray scale value 2 of the above-mentioned image is 0.0015, and only the display data 0.0017, 0.0015 and 0.0017 corresponding to the standard display data 0.0015 have an error of 0.0002 from the lookup table one. Since the standard gamma curve of a general display device allows an error of 0.2, gamma is a parameter for representing the luminance response characteristic of the display device, the relationship between the display luminance of the general display device and the input voltage of the source driver chip is close to an exponential curve, as shown in fig. 5 and 6, fig. 5 is a schematic diagram of the luminance response curve of the general display device, fig. 6 is a schematic diagram of the response curve after the normalization process of fig. 5 and a reference exponential curve, the horizontal direction of the curve in fig. 5 represents the input voltage, the vertical direction represents the display luminance, and after the normalization process of the curve, as shown in fig. 6, the response curve and the exponential function curve y ═ x2.2Very close, the luminance response curve of a display device can therefore be expressed as an exponential function, y-xγWhere γ is the gamma value and is actually the power of the exponential function. Because the gamma values of different display devices have different requirements, the gamma value of the traditional Cathode Ray Tube (CRT) display device is usually 2.2, because the display characteristics are more suitable for the visual characteristics of people, if the gamma value is larger, the whole image feels darker, and the details in the dark scene of the image are easy to lose; if the gamma value is small, the whole image feels brighter, the image becomes hazy, and the gradation feeling deteriorates. Of course, it is also required to make the gamma value 2.4, and the error of gamma value 0.2 is within the allowable range, so that the display data 0.0017 corresponding to the standard display data 0.0015 is found from the lookup table one, and the errors of 0.0002 in 0.0015 and 0.0017 are within the normal allowable error range.
In some alternative embodiments, please refer to fig. 1, fig. 2, and fig. 7 in combination, where fig. 7 is a schematic flowchart of another display method of a display device according to an embodiment of the present invention, in which the display method of the display device provided in this embodiment includes, in step 002: after searching for the standard display data corresponding to the standard gray scale value of the image from the standard table, step 003 specifically is to obtain, through a calculation algorithm, a backlight gray scale value when the backlight module 100 corresponding to the standard display data is emitting light and a display gray scale value when the first display panel 200 displays;
specifically, the backlight module 100 includes M backlight gray-scale values when emitting light, each backlight gray-scale value corresponds to one backlight data, and M is 2m(ii) a The first display panel 200 includes N display gray-scale values, each display gray-scale value corresponds to one display data, and N is 2n(ii) a Wherein m is more than or equal to 0, n is more than or equal to 0, and m and n are integers;
prestoring a standard table, wherein the standard table comprises B standard gray-scale values, each standard gray-scale value corresponds to one standard display data, and B is 2b(ii) a Wherein b > m, b > n, and b is an integer;
the calculation algorithm comprises the following steps:
calculating the value range of the backlight gray scale value of the backlight module 100 corresponding to the standard gray scale value of each first pixel 201 of the image through a first algorithm;
in one light emitting area 101, taking the intersection of the value ranges of the backlight gray-scale values of the backlight module 100 corresponding to the standard gray-scale value of each first pixel 201 of the image;
taking the integral value in the intersection as the backlight gray scale value when the backlight module 100 in the light emitting region 101 emits light, and then calculating the display gray scale value of the first display panel 200 corresponding to the backlight gray scale value;
the external driving circuit inputs a backlight gray scale value to the backlight module 100, and inputs a display gray scale value to the first display panel 20, and drives the display device 111 to display an image.
As shown in fig. 7, the display method of the present embodiment includes:
step 001: knowing the image to be displayed and the standard gray-scale value of each first pixel 201 corresponding to the image;
step 002: searching standard display data LV corresponding to a standard gray-scale value of the image from the standard table;
step 0031: calculating the value range of the backlight gray scale value of the backlight module 100 corresponding to the standard gray scale value of each first pixel 201 of the image through a first algorithm;
step 0032: in one light emitting area 101, taking the intersection of the value ranges of the backlight gray-scale values of the backlight module 100 corresponding to the standard gray-scale value of each first pixel 201 of the image;
step 0033: taking the integral value in the intersection as the backlight gray scale value when the backlight module 100 in the light emitting region 101 emits light, and then calculating the display gray scale value of the first display panel 200 corresponding to the backlight gray scale value;
step 004: the external driving circuit inputs a backlight gray scale value to the backlight module 100, and inputs a display gray scale value to the first display panel 20, and drives the display device 111 to display an image.
The embodiment further explains that the process of obtaining the backlight gray scale value when the backlight module 100 corresponding to the standard display data emits light and the display gray scale value when the first display panel 200 displays in step 003 can be realized by a calculation algorithm, so that an image with a high numerical bit can be displayed by the source driver IC with a low numerical bit, and the purposes of saving cost and improving display quality are achieved.
In some optional embodiments, please continue to refer to fig. 1, fig. 2, and fig. 7, in this embodiment, the value range of the backlight gray scale value of the backlight module 100 corresponding to the standard gray scale value of each first pixel 201 of the image calculated by the first algorithm specifically includes:
the backlight gray-scale value of the backlight module 100 corresponding to the standard gray-scale value of each first pixel 201 satisfies:
Figure BDA0002335723820000141
wherein, PWMRegThe standard Gray-scale values of the first pixels 201 are the backlight Gray-scale values of the backlight module 100, Gray is the display Gray-scale values of the first display panel 200 corresponding to each backlight Gray-scale value, Data is the standard Gray-scale value of each first pixel 201 of the known image, and γ is the standard gamma of the known first display panel 20Value, where 0.2 is the allowed error.
The method for calculating the value range of the backlight gray-scale value of the backlight module 100 corresponding to the standard gray-scale value of each first pixel 201 of the image comprises the following steps:
by binary functions
Figure BDA0002335723820000142
Drawing a curved surface graph of a binary function through a first section
Figure BDA0002335723820000143
Second cross section
Figure BDA0002335723820000144
The value range of the backlight gray scale value of the backlight module 100 corresponding to the standard gray scale value of each first pixel 201 of the image is clipped and controlled on the curved surface graph.
The embodiment further explains an algorithm process of obtaining the backlight gray-scale value when the backlight module 100 emits light and the display gray-scale value when the first display panel 200 displays, which correspond to the standard display data, by calculating an algorithm, and a value range of the backlight gray-scale value of the backlight module 100 corresponding to the standard gray-scale value of each first pixel 201 of the image is calculated by the first algorithm, wherein the backlight gray-scale value of the backlight module 100 corresponding to the standard gray-scale value of each first pixel 201 satisfies:
Figure BDA0002335723820000151
the method for calculating the value range of the backlight gray-scale value of the backlight module 100 corresponding to the standard gray-scale value of each first pixel 201 of the image comprises the following steps: by binary functions
Figure BDA0002335723820000152
Drawing a curved surface graph of a binary function through a first section
Figure BDA0002335723820000153
Second cross section
Figure BDA0002335723820000154
The value range of the backlight gray scale value of the backlight module 100 corresponding to the standard gray scale value of each first pixel 201 of the image is clipped and controlled on the curved surface graph.
The above calculation algorithm can also be directly converted into a new lookup table two, which is shown as follows:
Figure BDA0002335723820000155
each Data can determine PWM according to the following lookup table IIregThe specific reason for the value range of (a) is as follows:
Figure BDA0002335723820000161
is a monotonically increasing function, according to
Figure BDA0002335723820000162
Finding the backlight Gray scale value PWM of the backlight module 100 when Gray is maximum by the lookup table tworegmax; according to
Figure BDA0002335723820000163
Finding the backlight Gray-scale value PWM of the backlight module 100 when Gray is the minimum through the lookup table IIregmin; the backlight gray scale value of the backlight module 100 has a value range of (PWM)regmin，PWMregmax)。
The embodiment further explains that when the process of obtaining the backlight gray-scale value when the backlight module 100 corresponding to the standard display data emits light and the display gray-scale value when the first display panel 200 displays in step 003 are implemented by using a calculation algorithm, the process of implementing calculation is specifically implemented, and further, an image with a high numerical bit can be displayed by using a source driver IC with a low numerical bit, so as to achieve the purposes of saving cost and improving display quality.
In some optional embodiments, please refer to fig. 8, and fig. 8 is a schematic workflow block diagram provided by an embodiment of the present invention, and it can be understood that fig. 8 of this embodiment is a specific flowchart for realizing a 10-bit display effect of a display device by combining an 8-bit backlight module and an 8-bit first display panel, and specifically, as shown in fig. 8, a required 10-bit video or picture signal is input from the outside through an LVDS interface (where LVDS refers to Low-Voltage Differential Signaling, which is a signal transmission mode, a level standard, and an LVDS interface, also called an RS-644 bus interface, which is a data transmission and interface technology Low error rate, low crosstalk and low radiation, etc.), then transmitting 10-bit video or picture signals to a TCON (Timer Control Register) or an FPGA (Field Programmable Gate Array) for arithmetic operation processing to obtain a backlight gray scale value when the 8-bit backlight module in the 10-bit video or picture respectively corresponds to standard display data and a display gray scale value when the 8-bit first display panel displays, then transmitting the two values to the 8-bit backlight driving chip of the backlight module and the 8-bit source driving chip of the first display panel respectively, the backlight driving chip providing a driving signal to the backlight module according to the 8-bit backlight gray scale value, the source driving chip providing a driving signal to the first display panel according to the 8-bit display gray scale value, and finally the display device displaying the required 10-bit video or picture signals, thereby realizing the display of high-value images by the low-value bit source driving IC, the purposes of saving cost and improving display quality are achieved.
In some alternative embodiments, with continuing reference to fig. 1-7, in this embodiment, the first display panel 200 includes a first substrate 2001, a second substrate 2002 disposed opposite to each other, and a first liquid crystal layer 2003 disposed between the first substrate 2001 and the second substrate 2002, the second substrate 2002 is disposed on a side of the first substrate 2001 away from the backlight module 100, and the second substrate 2002 includes a color-resist layer 2004.
This embodiment further explains an optional structure of the display device 111, which may be a structure in which the backlight module 100 is matched with a single-screen first display panel 200, the first display panel 200 of the display device 111 may be a liquid crystal display panel, a first liquid crystal layer 2003 is disposed between the first substrate 2001 and the second substrate 2002, and the first display panel 200 utilizes the liquid crystal molecules of the first liquid crystal layer 2003 to change the arrangement direction of the liquid crystal molecules under the action of an external electric field, so that a backlight source provided by the backlight module 100 can pass through the first liquid crystal layer 2003, thereby displaying an image.
In some alternative embodiments, please continue to refer to fig. 1 and 9, fig. 9 is another schematic sectional view taken along direction a-a' of fig. 1, in which the display device 111 further includes a second display panel 300, and the second display panel 300 is located at one side of the light emitting surface E1 of the first display panel 200;
the second display panel 300 includes a plurality of second pixels 301 arranged in an array;
in one same region G of the display device 111, the number of light-emitting regions 101 is a ', the number of first pixels 201 is B ', and the number of second pixels 301 is C ', where C ' ═ B ', and C '/a ' < 50.
Optionally, the first display panel 200 includes a third substrate 2005, a fourth substrate 2006 and a second liquid crystal layer 2007 arranged between the third substrate 2005 and the fourth substrate 2006, which are oppositely disposed, the fourth substrate 2006 is located on a side of the third substrate 2005 far away from the backlight module 100, and the first display panel 200 implements black and white display;
the second display panel 300 includes a fifth substrate 3001, a sixth substrate 3002 and a third liquid crystal layer 3003 disposed between the fifth substrate 3001 and the sixth substrate 3002, the fifth substrate 3001 and the sixth substrate 3002 are opposite to each other, the sixth substrate 3002 is located on a side of the fifth substrate 3001 away from the first display panel 200, the sixth substrate 3002 includes a color resist layer 3004, and the second display panel 300 implements color display.
The present embodiment further explains another optional structure of the display device 111, which may be a structure in which the backlight module 100 is matched with the first display panel 200 and the second display panel 300 of the dual-panel, and the second display panel 300 may be a liquid crystal display panel, so that the second display panel 300 utilizes the liquid crystal molecules of the third liquid crystal layer 3003 to change the arrangement direction of the liquid crystal molecules under the action of the external electric field, so that the backlight source provided by the backlight module 100 can pass through the third liquid crystal layer 3003, thereby displaying an image. The first display panel 200 only needs to regulate and control the brightness of the first display panel, so that the second display panel 300 is finely regulated and controlled, and the effect of improving the contrast of the whole display device 111 is achieved. Therefore, the first display panel 200 only needs to be capable of black and white display, and the first display panel 200 is designed as a black and white screen, which can also avoid the situation that the transmittance of the whole display device is reduced due to the design of the first display panel 200 as a color screen. The present embodiment further explains that in one same region G of the display device 111, the number of light emitting regions 101 is a ', the number of first pixels 201 is B ', the number of second pixels 301 is C ', where C ' ═ B ', and C '/a ' < 50, i.e., the ratio of the number of first pixels 201 of the first display panel 200 to the number of second pixels 301 of the second display panel 300 is 1: 1, thereby really realizing the purpose of displaying the image with high numerical value bit through the source drive IC with low numerical value bit, and achieving the purposes of saving cost and improving display quality. If one first pixel 201 of the lower panel (i.e., the first display panel 200) corresponds to a plurality of second pixels 301 of the upper panel (i.e., the first display panel 300), the source driver ICs cannot individually provide the data voltage signals to the corresponding pixels when providing the signals, which is likely to cause signal interference.
It is understood that fig. 9 of the present embodiment only shows the structures of the second display panel 300, the first display panel 200, and the backlight module 100 by way of example, but is not limited to this structure, and may also include other structures capable of implementing a display function, such as a polarizer located between the first display panel 200 and the backlight module 100, and an upper polarizer and a lower polarizer located on the upper and lower surfaces of the second display panel 300, and the like.
As can be seen from the foregoing embodiments, the display method of the display device according to the present invention at least achieves the following advantages:
the backlight module comprises a plurality of luminous areas which are arranged in an array, can realize the Local Dimming function of the backlight module through the Local Dimming technology, improve the dynamic contrast ratio, realize energy conservation, greatly reduce the electric quantity, improve the contrast value and the gray scale number of a display picture, reduce the ghost shadow and the like. In the display method of the display device, when an image to be displayed is known, a standard gray-scale value of each first pixel corresponding to the image can be obtained; the standard display data corresponding to each standard gray scale value of the known image is searched from the standard table, then the backlight gray scale value when the backlight module corresponding to the standard display data emits light and the display gray scale value when the first display panel displays are obtained, and finally the external driving circuit drives the display device to display the image according to the obtained backlight gray scale value when the backlight module emits light and the display gray scale value when the first display panel displays, so that the combination of the 8-bit backlight module and the 8-bit first display panel is realized, and the 10-bit display effect of the display device is realized.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (11)

1. A display method of a display device, the display device comprising: the backlight module and the first display panel are oppositely arranged;
the first display panel is positioned on one side of the light-emitting surface of the backlight module, and the backlight module comprises a plurality of light-emitting areas which are arranged in an array; the first display panel comprises a plurality of first pixels arranged in an array;
in the same region of the display device, the number of the luminous regions is A, the number of the first pixels is B, and B/A is less than 50;
the backlight module comprises M backlight gray scale values when emitting light, each backlight gray scale value corresponds to one backlight data, and M is 2m(ii) a The first display panel comprises N display gray-scale values when displaying, each display gray-scale value corresponds to one piece of display data, and N is 2n(ii) a Wherein m is more than or equal to 0, n is more than or equal to 0, and m and n are integers;
pre-storing a standard table, wherein the standard table comprises B standard gray-scale values, each standard gray-scale value corresponds to one standard display data, and B is 2b(ii) a Wherein b > m, b > n, and b is an integer;
the display method comprises the following steps:
knowing an image to be displayed and a standard gray-scale value of each first pixel corresponding to the image;
searching standard display data corresponding to the standard gray-scale value of the image from the standard table;
obtaining a backlight gray scale value corresponding to the standard display data when the backlight module emits light and a display gray scale value when the first display panel displays the light;
and the external driving circuit drives the display device to display the image according to the obtained backlight gray-scale value when the backlight module emits light and the obtained display gray-scale value when the first display panel displays.
2. The display method of the display device according to claim 1, wherein standard display data corresponding to one of the standard grayscale values of the image is looked up from the standard table;
obtaining a backlight gray scale value corresponding to the standard display data when the backlight module emits light and a display gray scale value when the first display panel displays the light through a table look-up method;
the table lookup method comprises the following steps:
prestoring a lookup table, wherein the lookup table comprises A display data, A is M multiplied by N, and the A display data of the lookup table is formed by combining M backlight data of the backlight module and N gray scale data of the first display panel;
searching standard display data LV corresponding to one standard gray-scale value of the image from the standard table;
searching display data LV0 corresponding to the standard display data LV from the lookup table, wherein the display data LV0 corresponds to a backlight gray-scale value X of the backlight module and a display gray-scale value Y of the first display panel;
and the external driving circuit controls the backlight gray scale value of the light emitted by the backlight module to be X, so that the display gray scale value displayed by the first display panel is Y, and the image is displayed.
3. The display method of the display device according to claim 2, wherein the searching for the display data LV0 corresponding to the standard display data LV from the lookup table specifically includes: the value of the LV0 is equal to the value of the LV.
4. The display method of the display device according to claim 1, wherein standard display data corresponding to one of the standard grayscale values of the image is looked up from the standard table;
obtaining a backlight gray scale value corresponding to the standard display data when the backlight module emits light and a display gray scale value when the first display panel displays the light through a calculation algorithm;
the calculation algorithm comprises:
calculating the value range of the backlight gray scale value of the backlight module corresponding to the standard gray scale value of each first pixel of the image through a first algorithm;
in one light emitting area, taking the intersection of the value ranges of the backlight gray scale values of the backlight module corresponding to the standard gray scale value of each first pixel of the image;
taking the integral value in the intersection as a backlight gray scale value when the backlight module in the light emitting area emits light, and calculating a display gray scale value of the first display panel corresponding to the backlight gray scale value;
and the external driving circuit inputs the backlight gray scale value to the backlight module, inputs the display gray scale value to the first display panel and drives the display device to display the image.
5. The display method of the display device according to claim 4, wherein the calculating a range of the backlight gray-scale value of the backlight module corresponding to the standard gray-scale value of each first pixel of the image by a first algorithm specifically comprises:
the backlight gray-scale value of the backlight module corresponding to the standard gray-scale value of each first pixel meets the following requirements:
Figure FDA0003009626790000031
wherein, PWMRegThe Gray is a display Gray level value of the first display panel corresponding to each standard Gray level value of the first pixel, the Data is a known standard Gray level value of each first pixel of the image, and the gamma is a known standard gamma value of the first display panel.
6. The display method of a display device according to claim 5,
the calculation method of the value range of the backlight gray scale value of the backlight module corresponding to the standard gray scale value of each first pixel of the image comprises the following steps:
by binary functions
Figure FDA0003009626790000032
Drawing a curved surface graph of the binary function through a first section
Figure FDA0003009626790000033
Second cross section
Figure FDA0003009626790000034
Controlling each station of the image on the curved surface graphAnd the value range of the backlight gray scale value of the backlight module corresponding to the standard gray scale value of the first pixel.
7. The method according to claim 1, wherein the first display panel comprises a first substrate, a second substrate and a first liquid crystal layer, the first substrate and the second substrate are disposed opposite to each other, the first liquid crystal layer is disposed between the first substrate and the second substrate, the second substrate is disposed on a side of the first substrate away from the backlight module, and the second substrate comprises a color resist layer.
8. The method according to claim 1, wherein the display device further comprises a second display panel disposed on a side of the light-emitting surface of the first display panel;
the second display panel comprises a plurality of second pixels arranged in an array;
in the same region of the display device, the number of the light emitting regions is a ', the number of the first pixels is B ', the number of the second pixels is C ', wherein C ' ═ B ', and C '/a ' < 50.
9. The display method of a display device according to claim 8,
the first display panel comprises a third substrate, a fourth substrate and a second liquid crystal layer, wherein the third substrate and the fourth substrate are arranged oppositely, the second liquid crystal layer is arranged between the third substrate and the fourth substrate, the fourth substrate is positioned on one side of the third substrate, which is far away from the backlight module, and the first display panel realizes black and white display;
the second display panel comprises a fifth substrate, a sixth substrate and a third liquid crystal layer, wherein the fifth substrate and the sixth substrate are oppositely arranged, the third liquid crystal layer is arranged between the fifth substrate and the sixth substrate, the sixth substrate is located on one side, far away from the first display panel, of the fifth substrate, the sixth substrate comprises a color resistance layer, and the second display panel realizes color display.
10. The method as claimed in claim 1, wherein the backlight module is a direct-type backlight module.
11. The display method of the display device according to claim 10, wherein each of the light emitting regions includes a plurality of LED beads.
CN201911355218.8A 2019-12-25 2019-12-25 Display method of display device Active CN111028810B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911355218.8A CN111028810B (en) 2019-12-25 2019-12-25 Display method of display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911355218.8A CN111028810B (en) 2019-12-25 2019-12-25 Display method of display device

Publications (2)

Publication Number Publication Date
CN111028810A CN111028810A (en) 2020-04-17
CN111028810B true CN111028810B (en) 2021-08-24

Family

ID=70213089

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911355218.8A Active CN111028810B (en) 2019-12-25 2019-12-25 Display method of display device

Country Status (1)

Country Link
CN (1) CN111028810B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112509525B (en) * 2020-12-02 2022-04-26 Tcl华星光电技术有限公司 Control method and control device for liquid crystal display backlight module
CN112863427B (en) 2021-01-13 2022-05-13 厦门天马微电子有限公司 Method for adjusting brightness of light-emitting panel, light-emitting panel and display device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1949347A (en) * 2005-10-14 2007-04-18 群康科技(深圳)有限公司 Driving method for liquid crystal display
JP2008276019A (en) * 2007-05-01 2008-11-13 ▲ぎょく▼瀚科技股▲ふん▼有限公司 Dynamic backlight control method for liquid crystal display
CN101471043A (en) * 2007-12-24 2009-07-01 奇美电子股份有限公司 Field sequence type LCD apparatus and its driving method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI406261B (en) * 2008-07-03 2013-08-21 Cpt Technology Group Co Ltd Driving method of liquid crystal display

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1949347A (en) * 2005-10-14 2007-04-18 群康科技(深圳)有限公司 Driving method for liquid crystal display
JP2008276019A (en) * 2007-05-01 2008-11-13 ▲ぎょく▼瀚科技股▲ふん▼有限公司 Dynamic backlight control method for liquid crystal display
CN101471043A (en) * 2007-12-24 2009-07-01 奇美电子股份有限公司 Field sequence type LCD apparatus and its driving method

Also Published As

Publication number Publication date
CN111028810A (en) 2020-04-17

Similar Documents

Publication Publication Date Title
EP3013029B1 (en) Data conversation unit and method for data conversation and display device having data conversation unit
US7911442B2 (en) Dynamic color gamut of LED backlight
US8358293B2 (en) Method for driving light source blocks, driving unit for performing the method and display apparatus having the driving unit
KR101158868B1 (en) Liquid Crystal Display capable of adjusting each brightness level in plural divided areas and method for driving the same
US9595229B2 (en) Local dimming method and liquid crystal display
US10229642B2 (en) Liquid crystal display device
KR101578214B1 (en) Liquid crystal display device and driving method thereof
US20090051637A1 (en) Display devices
US9349312B2 (en) AMOLED display device and method for precisely compensating aging thereof
CN112863427B (en) Method for adjusting brightness of light-emitting panel, light-emitting panel and display device
US8378959B2 (en) Method of dimming light sources, light source apparatus for performing the method, and display apparatus having the light source apparatus
KR101899399B1 (en) Liquid crystal display device driving circuit and method thereof
US8305332B2 (en) Backlight unit, liquid crystal display device including the same, and localized dimming method thereof
US9330607B2 (en) Display device including a gray compensator and method of driving the same
CN111028810B (en) Display method of display device
CN110534054B (en) Display driving method and device, display device, storage medium and chip
KR101025800B1 (en) Display device capable of using both of global dimming and local dimming
KR101989527B1 (en) Image Display Device And Method Of Displaying Image
US20080001879A1 (en) Driving method of liquid crystal display device
CN109410819B (en) Display system and driving method of display system
KR101320653B1 (en) Display and Driving Method of the same
KR102141032B1 (en) Image displaying method and display device driving thereof
US20230138364A1 (en) Display processing apparatus and method for processing image data
KR20070064101A (en) Electron emission display device and driving method thereof
US20090085498A1 (en) Electron emission device for back light unit and liquid crystal display thereof

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
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20221013

Address after: 3rd Floor, Building B1, Wanjiang Fortune Plaza, No. 88 Ruixiang Road, Guandou Street, Jiujiang District, Wuhu City, Anhui Province 241060

Patentee after: Wuhu Tianma Automotive Electronics Co.,Ltd.

Address before: 201201 888 and 889 Huiqing Road, Pudong New Area, Shanghai

Patentee before: SHANGHAI TIANMA MICRO-ELECTRONICS Co.,Ltd.