CN111641820A - White balance adjusting method and device of liquid crystal display panel - Google Patents
White balance adjusting method and device of liquid crystal display panel Download PDFInfo
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- CN111641820A CN111641820A CN202010437108.2A CN202010437108A CN111641820A CN 111641820 A CN111641820 A CN 111641820A CN 202010437108 A CN202010437108 A CN 202010437108A CN 111641820 A CN111641820 A CN 111641820A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0127—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter
Abstract
The application provides a white balance adjusting method of a liquid crystal display panel, which comprises the following steps: determining interpolation parameters corresponding to two endpoint frame rates of a frame rate interval containing the current frame rate according to the current frame rate of the liquid crystal display panel and an interpolation parameter table; acquiring an intermediate white balance data table corresponding to the endpoint frame rate according to the interpolation parameters and the original white balance data table; performing linear interpolation on two intermediate white balance data tables corresponding to the two endpoint frame rates to obtain a target white balance data table corresponding to the current frame rate; and carrying out white balance adjustment on the liquid crystal display panel according to the target white balance data table. According to the method and the device, the target white balance data table corresponding to the current frame rate can be continuously generated along with the change of the frame rate of the liquid crystal display panel, so that the liquid crystal display panel can achieve the optimal white balance adjustment effect under any frame rate, and the display effects of the liquid crystal display panel under different frame rates tend to be consistent. The application also provides a white balance adjusting device of the liquid crystal display panel.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a method and an apparatus for adjusting white balance of a liquid crystal display panel.
Background
Liquid Crystal Display (LCD) devices have become the mainstream products in Display devices due to their advantages of thin body, power saving, and no radiation. Most of LCD devices in the existing market are backlight type LCD devices, which include an LCD panel and a backlight module. The working principle of the LCD panel is as follows: the deflection angle of liquid crystal molecules erected between the two parallel glass substrates is controlled by applying voltage to the two parallel glass substrates, so that light rays of the backlight module are refracted out to generate a picture.
Because the white field color coordinates of different LCD panels have different differences in different degrees, if corresponding white balance adjustment is not performed, the display effects of different LCD panels have a large difference, and therefore, the white balance adjustment needs to be performed in the production process of each LCD panel to reduce the difference in display effects between different LCD panels.
The conventional white balance method of the LCD panel is: and acquiring a white balance data table of the LCD panel, wherein the table comprises a plurality of gray scales and a white balance value corresponding to each gray scale, and carrying out white balance adjustment on the LCD panel through the white balance data table, specifically carrying out white balance adjustment on sub-pixels corresponding to the gray scales according to the white balance values in the white balance data table. However, with the development of display technology, the LCD panel has various frame rates, and when the frame rate of the LCD panel changes, the original white balance data table is still used to perform white balance adjustment on the LCD panel, which cannot make the LCD panel achieve the optimal white balance adjustment effect, resulting in a larger difference in display effects of the same LCD panel at different frame rates.
Disclosure of Invention
Therefore, it is necessary to provide a method and an apparatus for adjusting white balance of a liquid crystal display panel, so as to ensure that the display effects of the liquid crystal display panel at different frame rates are consistent.
In a first aspect, an embodiment of the present application provides a method for adjusting a white balance of a liquid crystal display panel, including the following steps:
determining a frame rate interval containing the current frame rate according to the current frame rate of the liquid crystal display panel and a preset interpolation parameter table, determining two endpoint frame rates of the frame rate interval, and determining an interpolation parameter corresponding to each endpoint frame rate; the interpolation parameter table comprises a plurality of endpoint frame rates and the interpolation parameter corresponding to each endpoint frame rate;
acquiring an intermediate white balance data table corresponding to the endpoint frame rate according to the interpolation parameter and a preset original white balance data table; the original white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at a standard frame rate, and the intermediate white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at an endpoint frame rate;
performing linear interpolation on the two intermediate white balance data tables corresponding to the two endpoint frame rates to obtain a target white balance data table corresponding to the current frame rate; the target white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at the current frame rate;
and carrying out white balance adjustment on the liquid crystal display panel according to the target white balance data table.
In some embodiments, the step of "determining a frame rate interval including the current frame rate according to the current frame rate of the liquid crystal display panel and a preset interpolation parameter table" includes:
arranging a plurality of end point frame rates in a descending order, and taking a frame rate section between every two adjacent end point frame rates as one frame rate interval;
taking the frame rate interval meeting the preset condition as the frame rate interval containing the current frame rate;
the preset condition is that one of the two endpoint frame rates in the same frame rate interval is smaller than the current frame rate, and the other one is larger than the current frame rate.
In some embodiments, the original white balance data table is divided into three original tables, one for each color sub-pixel, each original table includes a plurality of the gray levels of the corresponding color sub-pixel, and a corresponding white balance value of each gray level at the standard frame rate.
In some embodiments, the step of "obtaining an intermediate white balance data table corresponding to the endpoint frame rate according to the interpolation parameter and a preset original white balance data table" includes:
multiplying a plurality of white balance values in each original table by the interpolation parameter respectively to obtain three intermediate tables corresponding to the endpoint frame rate; each intermediate table comprises a plurality of gray scales of the sub-pixels of the corresponding color and a white balance value corresponding to each gray scale at the endpoint frame rate;
and combining three intermediate tables to form the intermediate white balance data table.
In some embodiments, the step of performing linear interpolation on the two intermediate white balance data tables corresponding to the two endpoint frame rates to obtain the target white balance data table corresponding to the current frame rate includes:
performing linear interpolation on every two same intermediate tables in the six intermediate tables corresponding to the two endpoint frame rates to obtain three target tables corresponding to the current frame rate; the colors of the sub-pixels corresponding to the two intermediate tables of the same kind are the same, the sub-pixel of each color corresponds to one target table, and each target table comprises a plurality of gray scales of the sub-pixels of the corresponding color and a white balance value corresponding to each gray scale at the current frame rate;
and combining the three target tables to form the target white balance data table.
In some embodiments, the step of "determining a frame rate interval including the current frame rate according to the current frame rate of the liquid crystal display panel and a preset interpolation parameter table" further includes:
acquiring the pixel clock signal frequency of the liquid crystal display panel at the current moment according to the video source signal of the liquid crystal display panel;
and calculating the current frame rate of the liquid crystal display panel according to the pixel clock signal frequency and a preset frame rate calculation formula.
In some embodiments, the frame rate calculation formula is:
Frame_Rate＝Pixel_Clock_Frequency/(H_total*V_total)；
the Frame _ Rate is the current Frame Rate, the Pixel _ Clock _ Frequency is the Pixel Clock signal Frequency, the H _ total is the total scanning time of the liquid crystal display panel in the horizontal direction set at the current time, and the V _ total is the total scanning time of the liquid crystal display panel in the vertical direction set at the current time.
In a second aspect, an embodiment of the present application provides a white balance adjustment apparatus for a liquid crystal display panel, including a memory, a processor, an interpolation parameter determining module, an intermediate white balance data table obtaining module, a target white balance data table obtaining module, and a white balance adjustment module; the memory is coupled to the processor for storing a plurality of instructions executable by the processor, the plurality of instructions comprising:
controlling the interpolation parameter determining module to determine a frame rate interval containing the current frame rate according to the current frame rate of the liquid crystal display panel and a preset interpolation parameter table, determine two endpoint frame rates of the frame rate interval, and determine an interpolation parameter corresponding to each endpoint frame rate; the interpolation parameter table comprises a plurality of endpoint frame rates and the interpolation parameter corresponding to each endpoint frame rate;
controlling the intermediate white balance data table acquisition module to acquire an intermediate white balance data table corresponding to the endpoint frame rate according to the interpolation parameter and a preset original white balance data table; the original white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at a standard frame rate, and the intermediate white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at an endpoint frame rate;
controlling the target white balance data table acquisition module to perform linear interpolation on the two intermediate white balance data tables corresponding to the two endpoint frame rates so as to acquire a target white balance data table corresponding to the current frame rate; the target white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at the current frame rate;
and controlling the white balance adjusting module to perform white balance adjustment on the liquid crystal display panel according to the target white balance data table.
In some embodiments, the interpolation parameter determination module comprises:
the sequencing unit is used for sequencing the end point frame rates from small to large, and taking a frame rate section between every two adjacent end point frame rates as a frame rate interval;
a frame rate section determining unit configured to determine the frame rate section satisfying a preset condition as the frame rate section including the current frame rate;
the preset condition is that one of the two endpoint frame rates in the same frame rate interval is smaller than the current frame rate, and the other one is larger than the current frame rate.
In some embodiments, the original white balance data table is divided into three original tables, one for each color sub-pixel, each original table includes a plurality of the gray levels of the corresponding color sub-pixel, and a corresponding white balance value of each gray level at the standard frame rate.
According to the white balance adjustment method and device for the liquid crystal display panel, the intermediate white balance data tables corresponding to the two endpoint frame rates of the frame rate interval including the current frame rate are determined through the current frame rate, the interpolation parameter table and the original white balance data table of the liquid crystal display panel, the target white balance data table corresponding to the current frame rate is determined through the linear interpolation operation of the two intermediate white balance data tables, and then the white balance adjustment is performed on the liquid crystal display panel through the target white balance data table. The method and the device provided by the embodiment of the application can continuously generate the target white balance data table corresponding to the current frame rate according to the original white balance data table along with the change of the frame rate of the liquid crystal display panel, so that the gray scale and the brightness curve of the liquid crystal display panel can be controlled to meet the requirement of gamma 2.2 at any frame rate, the optimal white balance adjustment effect is achieved, and the display effects of the liquid crystal display panel at different frame rates are ensured to be consistent.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a white balance adjustment method for an lcd panel according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a flowchart of a white balance adjustment method for an lcd panel according to an embodiment of the present disclosure, as shown in fig. 1, the method includes:
Specifically, the frame rate of the liquid crystal display panel in the embodiment of the present application is variable, and the frame rate of the liquid crystal display panel at the current time can be calculated according to the pixel clock signal frequency of the liquid crystal display panel at the current time, the total scanning time of the liquid crystal display panel in the horizontal direction set at the current time, and the total scanning time of the liquid crystal display panel in the vertical direction set at the current time.
In the embodiment of the present application, assuming that the frame rate variation range is 60-120Hz, a plurality of frame rates are selected from 60-120Hz in advance as the endpoint frame rates, and corresponding interpolation parameters are preset for the endpoint frame rates, so as to form an interpolation parameter table shown in table 1.
TABLE 1 interpolation parameter Table
| Endpoint frame rate | Interpolation parameter |
| 65Hz | Q1 |
| 80Hz | Q2 |
| ……. | …… |
| 90Hz | Qm-1 |
| 110Hz | Qm |
Table 1 is an interpolation parameter table, and if the current frame rate is 95Hz, it is determined that the frame rate interval in which the current frame rate is located is 90-110Hz according to the content shown in Table 1, the two endpoint frame rates of the frame rate interval are 90Hz and 110Hz, respectively, and the interpolation parameter corresponding to the endpoint frame rate of 90Hz is Qm-1And the interpolation parameter corresponding to the endpoint frame rate of 110Hz is Qm。
102, acquiring an intermediate white balance data table corresponding to the endpoint frame rate according to the interpolation parameter and a preset original white balance data table; the original white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at a standard frame rate, and the intermediate white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at an endpoint frame rate.
Specifically, the standard frame rate may be arbitrarily selected within a variation range of the frame rate, and this is not specifically limited in the embodiment of the present application. Based on Qm-1And an original white balance data table, acquiring a first intermediate white balance data table corresponding to the endpoint frame rate of 90Hz, and based on QmAnd the original white balance data table, and acquiring a second intermediate white balance data table corresponding to the endpoint frame rate of 110 Hz.
The first intermediate white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at an endpoint frame rate of 90Hz, and the second intermediate white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at an endpoint frame rate of 110 Hz.
Specifically, linear interpolation is performed on the first intermediate white balance data table and the second intermediate white balance data table to obtain a target white balance data table corresponding to the current frame rate.
And 104, carrying out white balance adjustment on the liquid crystal display panel according to the target white balance data table.
Specifically, the white balance adjustment is performed on the sub-pixels corresponding to the gray scales according to the white balance value in the target white balance data table, so that the liquid crystal display panel achieves the optimal white balance adjustment effect under the current frame rate.
According to the white balance adjustment method for the liquid crystal display panel, the intermediate white balance data tables corresponding to the two endpoint frame rates of the frame rate interval including the current frame rate are determined through the current frame rate, the interpolation parameter table and the original white balance data table of the liquid crystal display panel, the target white balance data table corresponding to the current frame rate is determined through the linear interpolation operation of the two intermediate white balance data tables, and then the white balance adjustment is performed on the liquid crystal display panel through the target white balance data table. According to the method provided by the embodiment of the application, the target white balance data table corresponding to the current frame rate can be continuously generated according to the original white balance data table along with the change of the frame rate of the liquid crystal display panel, so that the gray scale and the brightness curve of the liquid crystal display panel can be controlled to meet the requirement of gamma 2.2 at any frame rate, the optimal white balance adjustment effect is achieved, and the display effects of the liquid crystal display panel at different frame rates tend to be consistent.
In some embodiments, the step of determining a frame rate interval including the current frame rate according to the current frame rate of the liquid crystal display panel and a preset interpolation parameter table includes:
arranging a plurality of endpoint frame rates in a descending order, and taking a frame rate section between every two adjacent endpoint frame rates as a frame rate interval; taking the frame rate interval meeting the preset condition as a frame rate interval containing the current frame rate; the preset condition is that one of two endpoint frame rates in the same frame rate interval is less than the current frame rate, and the other one is greater than the current frame rate.
For example, if the end frame rates are 65Hz, 80Hz, 90Hz and 110Hz, respectively, 65-80Hz is a frame rate interval, 80-90Hz is a frame rate interval, 90-110Hz is a frame rate interval, and if the current frame rate is 95Hz, the frame rate interval satisfying the preset condition is 90-110 Hz.
In some embodiments, the original white balance data table is divided into three original tables, one for each color sub-pixel, each original table including a number of gray levels for the corresponding color sub-pixel, and a corresponding white balance value for each gray level at the standard frame rate.
Specifically, the liquid crystal display panel in the embodiment of the present application has subpixels of three colors in total, which are respectively a red subpixel, a green subpixel, and a blue subpixel. And dividing the original white balance data table into three original tables according to the colors of the sub-pixels, so that the sub-pixels of each color correspond to one original table.
For example, the three original tables are the first original table, the second original table and the third original table, respectively. The red sub-pixel corresponds to a first original table, and the first original table comprises a plurality of gray scales of the red sub-pixel and a white balance value corresponding to each gray scale at a standard frame rate; the green sub-pixels correspond to a second original table, and the second original table comprises a plurality of gray scales of the green sub-pixels and a white balance value corresponding to each gray scale at a standard frame rate; the blue sub-pixel corresponds to a third original table, and the third original table includes a plurality of gray levels of the blue sub-pixel, and a white balance value corresponding to each gray level at the standard frame rate.
Table 2 is a first original table, and table 2 shows the corresponding white balance values of 1024 gray levels of the red sub-pixel at the standard frame rate.
Table 2 first original form
| Gray scale | White balance value |
| 0-500 | K1 |
| 501-700 | K2 |
| ……. | …… |
| 800-900 | Km-1 |
| 901-1023 | Km |
It should be noted that the second original table and the third original table are similar to the first original table shown in table 2, and the embodiments of the present application do not show the tables of the second original table and the third original table.
In some embodiments, the step of obtaining an intermediate white balance data table corresponding to the endpoint frame rate according to the interpolation parameter and a preset original white balance data table includes:
multiplying a plurality of white balance values in each original table by interpolation parameters respectively to obtain three intermediate tables corresponding to the endpoint frame rate; each intermediate table comprises a plurality of gray scales of the sub-pixels of the corresponding color and a white balance value corresponding to each gray scale at the endpoint frame rate; and combining the three intermediate tables to form an intermediate white balance data table.
Specifically, a plurality of white balance values in a first original table are respectively multiplied by interpolation parameters to obtain a first intermediate table corresponding to the endpoint frame rate; multiplying a plurality of white balance values in the second original table by the interpolation parameters respectively to obtain a second intermediate table corresponding to the endpoint frame rate; multiplying a plurality of white balance values in a third original table by the interpolation parameters respectively to obtain a third intermediate table corresponding to the endpoint frame rate; and combining the three intermediate tables to form an intermediate white balance data table.
For example, the interpolation parameter corresponding to the endpoint frame rate of 90Hz is Qm-1Respectively connecting a plurality of white balance values in the first original table with Qm-1The first intermediate table corresponding to the endpoint frame rate of 90Hz is obtained as shown in table 3.
Table 3 is a first intermediate table corresponding to an endpoint frame rate of 90Hz, and Table 3 shows the white balance values of 1024 gray levels of the red sub-pixel at the endpoint frame rate of 90 Hz.
First intermediate table corresponding to end point frame rate of table 390 Hz
| Gray scale | White balance value |
| 0-500 | K1*Qm-1 |
| 501-700 | K2*Qm-1 |
| ……. | …… |
| 800-900 | Km-1*Qm-1 |
| 901-1023 | Km*Qm-1 |
In some embodiments, the step of performing linear interpolation on two intermediate white balance data tables corresponding to the two endpoint frame rates to obtain the target white balance data table corresponding to the current frame rate includes:
performing linear interpolation on every two same intermediate tables in the six intermediate tables corresponding to the two endpoint frame rates to obtain three target tables corresponding to the current frame rate; the colors of the sub-pixels corresponding to the two intermediate tables of the same kind are the same, the sub-pixel of each color corresponds to a target table, and each target table comprises a plurality of gray scales of the sub-pixel of the corresponding color and a white balance value corresponding to each gray scale at the current frame rate; and combining the three target tables to form a target white balance data table.
Specifically, the two endpoint frame rates are respectively referred to as a first endpoint frame rate and a second endpoint frame rate, the first endpoint frame rate corresponds to three target tables, and the second endpoint frame rate also corresponds to three target tables. Performing linear interpolation on a first intermediate table corresponding to the first end point frame rate and a first intermediate table corresponding to the second end point frame rate to obtain a first target table corresponding to the current frame rate; performing linear interpolation on a second intermediate table corresponding to the second end point frame rate and a second intermediate table corresponding to the second end point frame rate to obtain a second target table corresponding to the current frame rate; and performing linear interpolation on the third intermediate table corresponding to the first end point frame rate and the third intermediate table corresponding to the second end point frame rate to obtain a third target table corresponding to the current frame rate.
For example, the first intermediate table corresponding to the endpoint frame rate of 90Hz and 90Hz is shown in table 3, and the first intermediate table corresponding to the endpoint frame rate of 110Hz and 110Hz is shown in table 4.
Table 4 is a first intermediate table corresponding to an endpoint frame rate of 110Hz, and Table 4 shows the white balance values of 1024 gray levels of the red sub-pixel corresponding to the endpoint frame rate of 110 Hz.
First intermediate table corresponding to endpoint frame rate of table 4110 Hz
The linear interpolation is performed on the first intermediate table corresponding to the endpoint frame rate of 90Hz shown in table 3 and the first intermediate table corresponding to the endpoint frame rate of 110Hz shown in table 4, specifically:
and performing linear interpolation on the white balance values of the same gray scale in the two first intermediate tables, and acquiring a first target table corresponding to the current frame rate of 95Hz as shown in the table 5 according to the current frame rate.
Table 5 is a first target table corresponding to the current frame rate of 95Hz, and as shown in Table 5, Table 5 shows the white balance values corresponding to the 1024 gray levels of the red sub-pixel at the current frame rate of 95 Hz.
First target table corresponding to current frame rate of table 595 Hz
In some embodiments, the step of determining a frame rate interval including the current frame rate according to the current frame rate of the liquid crystal display panel and a preset interpolation parameter table further comprises:
acquiring the pixel clock signal frequency of the liquid crystal display panel at the current moment according to the video source signal of the liquid crystal display panel; and calculating the current frame rate of the liquid crystal display panel according to the pixel clock signal frequency and a preset frame rate calculation formula.
In some embodiments, the frame rate calculation formula is:
Frame_Rate＝Pixel_Clock_Frequency/(H_total*V_total)；
the Frame _ Rate is a current Frame Rate, the Pixel _ Clock _ Frequency is a Pixel Clock signal Frequency, the H _ total is a total scanning time of the liquid crystal display panel in the horizontal direction set at the current time, and the V _ total is a total scanning time of the liquid crystal display panel in the vertical direction set at the current time.
The embodiment of the application also provides a white balance adjusting device of the liquid crystal display panel, which comprises a memory, a processor, an interpolation parameter determining module, a middle white balance data table obtaining module, a target white balance data table obtaining module and a white balance adjusting module; the memory is coupled to the processor for storing a plurality of instructions executable by the processor, the plurality of instructions comprising:
the control interpolation parameter determining module determines a frame rate interval containing the current frame rate according to the current frame rate of the liquid crystal display panel and a preset interpolation parameter table, determines two endpoint frame rates of the frame rate interval, and determines an interpolation parameter corresponding to each endpoint frame rate; the interpolation parameter table comprises a plurality of endpoint frame rates and interpolation parameters corresponding to each endpoint frame rate; controlling an intermediate white balance data table acquisition module to acquire an intermediate white balance data table corresponding to the endpoint frame rate according to the interpolation parameter and a preset original white balance data table; the original white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at a standard frame rate, and the intermediate white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at an endpoint frame rate; the control target white balance data table acquisition module performs linear interpolation on two intermediate white balance data tables corresponding to the two endpoint frame rates to acquire a target white balance data table corresponding to the current frame rate; the target white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at the current frame rate; and the control white balance adjusting module is used for carrying out white balance adjustment on the liquid crystal display panel according to the target white balance data table.
In particular, the memory may be used to store software programs and modules, which mainly include a program storage area and a data storage area. The processor executes various functional applications and data processing by executing software programs and modules stored in the memory.
The processor performs various functions and processes data by running or executing software programs and/or modules stored in the memory and calling data stored in the memory, thereby performing overall monitoring.
The white balance adjustment device for a liquid crystal display panel provided in the embodiment of the present application specifically executes the processes of the above method embodiments, and please refer to the contents of the above method embodiments for details, which are not described herein again. According to the device provided by the embodiment of the application, the intermediate white balance data tables corresponding to the two endpoint frame rates of the frame rate interval including the current frame rate are determined through the current frame rate, the interpolation parameter table and the original white balance data table of the liquid crystal display panel, the target white balance data table corresponding to the current frame rate is further determined through the linear interpolation operation of the two intermediate white balance data tables, and then the white balance adjustment is carried out on the liquid crystal display panel through the target white balance data table. The device provided by the embodiment of the application can continuously generate the target white balance data table corresponding to the current frame rate according to the original white balance data table along with the change of the frame rate of the liquid crystal display panel, so that the gray scale and the brightness curve of the liquid crystal display panel can be controlled to meet the requirement of gamma 2.2 at any frame rate, the optimal white balance adjustment effect is achieved, and the display effects of the liquid crystal display panel at different frame rates tend to be consistent.
In some embodiments, the interpolation parameter determination module comprises:
the sequencing unit is used for sequencing the end point frame rates from small to large, and taking a frame rate section between every two adjacent end point frame rates as a frame rate interval; a frame rate interval determination unit, configured to use a frame rate interval satisfying a preset condition as a frame rate interval including a current frame rate; the preset condition is that one of two endpoint frame rates in the same frame rate interval is less than the current frame rate, and the other one is greater than the current frame rate.
Specifically, the sorting unit and the frame rate interval determining unit in the interpolation parameter determining module are configured to execute the process of the foregoing method embodiment, and details of the foregoing method embodiment are specifically referred to, and are not described herein again.
In some embodiments, the original white balance data table is divided into three original tables, one for each color sub-pixel, each original table including a number of gray levels for the corresponding color sub-pixel, and a corresponding white balance value for each gray level at the standard frame rate.
Specifically, the content of the method embodiment is described in detail for the division of the original white balance data table and the description of the three original tables, which is not described herein again.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above embodiments of the present application are described in detail, and specific examples are applied in the present application to explain the principles and implementations of the present application, and the description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A white balance adjustment method of a liquid crystal display panel is characterized by comprising the following steps:
determining a frame rate interval containing the current frame rate according to the current frame rate of the liquid crystal display panel and a preset interpolation parameter table, determining two endpoint frame rates of the frame rate interval, and determining an interpolation parameter corresponding to each endpoint frame rate; the interpolation parameter table comprises a plurality of endpoint frame rates and the interpolation parameter corresponding to each endpoint frame rate;
acquiring an intermediate white balance data table corresponding to the endpoint frame rate according to the interpolation parameter and a preset original white balance data table; the original white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at a standard frame rate, and the intermediate white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at an endpoint frame rate;
performing linear interpolation on the two intermediate white balance data tables corresponding to the two endpoint frame rates to obtain a target white balance data table corresponding to the current frame rate; the target white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at the current frame rate;
and carrying out white balance adjustment on the liquid crystal display panel according to the target white balance data table.
2. The white balance adjustment method of claim 1, wherein the step of determining a frame rate interval including a current frame rate of the liquid crystal display panel according to the current frame rate and a preset interpolation parameter table comprises:
arranging a plurality of end point frame rates in a descending order, and taking a frame rate section between every two adjacent end point frame rates as one frame rate interval;
taking the frame rate interval meeting the preset condition as the frame rate interval containing the current frame rate;
the preset condition is that one of the two endpoint frame rates in the same frame rate interval is smaller than the current frame rate, and the other one is larger than the current frame rate.
3. The white balance adjustment method according to claim 1, wherein the original white balance data table is divided into three original tables, one original table is corresponding to each color sub-pixel, each original table includes a plurality of the gray levels of the corresponding color sub-pixel, and each gray level has a corresponding white balance value at the standard frame rate.
4. The white balance adjustment method according to claim 3, wherein the step of obtaining an intermediate white balance data table corresponding to the endpoint frame rate according to the interpolation parameter and a preset original white balance data table comprises:
multiplying a plurality of white balance values in each original table by the interpolation parameter respectively to obtain three intermediate tables corresponding to the endpoint frame rate; each intermediate table comprises a plurality of gray scales of the sub-pixels of the corresponding color and a white balance value corresponding to each gray scale at the endpoint frame rate;
and combining three intermediate tables to form the intermediate white balance data table.
5. The white balance adjustment method according to claim 4, wherein the step of performing linear interpolation on two intermediate white balance data tables corresponding to two end frame rates to obtain the target white balance data table corresponding to the current frame rate includes:
performing linear interpolation on every two same intermediate tables in the six intermediate tables corresponding to the two endpoint frame rates to obtain three target tables corresponding to the current frame rate; the colors of the sub-pixels corresponding to the two intermediate tables of the same kind are the same, the sub-pixel of each color corresponds to one target table, and each target table comprises a plurality of gray scales of the sub-pixels of the corresponding color and a white balance value corresponding to each gray scale at the current frame rate;
and combining the three target tables to form the target white balance data table.
6. The white balance adjustment method according to claim 1, wherein the step of determining a frame rate interval including the current frame rate according to the current frame rate of the LCD panel and a preset interpolation parameter table further comprises:
acquiring the pixel clock signal frequency of the liquid crystal display panel at the current moment according to the video source signal of the liquid crystal display panel;
and calculating the current frame rate of the liquid crystal display panel according to the pixel clock signal frequency and a preset frame rate calculation formula.
7. The white balance adjustment method according to claim 6, wherein the frame rate calculation formula is:
Frame_Rate＝Pixel_Clock_Frequency/(H_total*V_total)；
the Frame _ Rate is the current Frame Rate, the Pixel _ Clock _ Frequency is the Pixel Clock signal Frequency, the H _ total is the total scanning time of the liquid crystal display panel in the horizontal direction set at the current time, and the V _ total is the total scanning time of the liquid crystal display panel in the vertical direction set at the current time.
8. The white balance adjusting device of the liquid crystal display panel is characterized by comprising a memory, a processor, an interpolation parameter determining module, a middle white balance data table acquiring module, a target white balance data table acquiring module and a white balance adjusting module; the memory is coupled to the processor for storing a plurality of instructions executable by the processor, the plurality of instructions comprising:
controlling the interpolation parameter determining module to determine a frame rate interval containing the current frame rate according to the current frame rate of the liquid crystal display panel and a preset interpolation parameter table, determine two endpoint frame rates of the frame rate interval, and determine an interpolation parameter corresponding to each endpoint frame rate; the interpolation parameter table comprises a plurality of endpoint frame rates and the interpolation parameter corresponding to each endpoint frame rate;
controlling the intermediate white balance data table acquisition module to acquire an intermediate white balance data table corresponding to the endpoint frame rate according to the interpolation parameter and a preset original white balance data table; the original white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at a standard frame rate, and the intermediate white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at an endpoint frame rate;
controlling the target white balance data table acquisition module to perform linear interpolation on the two intermediate white balance data tables corresponding to the two endpoint frame rates so as to acquire a target white balance data table corresponding to the current frame rate; the target white balance data table comprises a plurality of gray scales and a white balance value corresponding to each gray scale at the current frame rate;
and controlling the white balance adjusting module to perform white balance adjustment on the liquid crystal display panel according to the target white balance data table.
9. The white balance adjustment apparatus of claim 8, wherein the interpolation parameter determination module comprises:
the sequencing unit is used for sequencing the end point frame rates from small to large, and taking a frame rate section between every two adjacent end point frame rates as a frame rate interval;
a frame rate section determining unit configured to determine the frame rate section satisfying a preset condition as the frame rate section including the current frame rate;
the preset condition is that one of the two endpoint frame rates in the same frame rate interval is smaller than the current frame rate, and the other one is larger than the current frame rate.
10. The white balance adjustment apparatus according to claim 8, wherein the original white balance data table is divided into three original tables, one for each color sub-pixel, each original table includes a plurality of the gray levels of the corresponding color sub-pixel, and each gray level has a corresponding white balance value at the standard frame rate.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113707069A (en) * | 2021-08-30 | 2021-11-26 | Tcl华星光电技术有限公司 | Time schedule controller, display terminal and display compensation method |
| CN114765017A (en) * | 2021-01-13 | 2022-07-19 | 辉达公司 | Pixel degradation tracking and compensation for display technology |
| US11443711B2 (en) * | 2020-04-01 | 2022-09-13 | Tcl China Star Optoelectronics Technology Co., Ltd. | Liquid crystal display panel improving flicker problem due to difference of grey voltages and refreshing frequency |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533611A (en) * | 2008-03-10 | 2009-09-16 | 奇美电子股份有限公司 | Liquid crystal display panel, liquid crystal display device and control method thereof |
| US20100007595A1 (en) * | 2008-07-08 | 2010-01-14 | Chi Mei Optoelectronics Corp. | Driving method for liquid crystal panel and lcd |
| CN103730096A (en) * | 2013-12-31 | 2014-04-16 | 深圳市华星光电技术有限公司 | White balance adjusting method and system and LCD manufacturing method |
| CN105263010A (en) * | 2015-11-26 | 2016-01-20 | 深圳市华星光电技术有限公司 | Automatic white balance method and system |
| CN107360410A (en) * | 2017-07-10 | 2017-11-17 | 广东欧珀移动通信有限公司 | Method for controlling white balance, device and terminal device |
| CN107358933A (en) * | 2017-09-15 | 2017-11-17 | 深圳市华星光电技术有限公司 | The white balance method and device of liquid crystal display panel |
| CN107799086A (en) * | 2017-11-22 | 2018-03-13 | 深圳市华星光电技术有限公司 | The over-driving method and device of liquid crystal display panel |
| CN107945756A (en) * | 2017-11-21 | 2018-04-20 | 深圳市华星光电技术有限公司 | The white balance method and device of liquid crystal display panel |
| CN110223650A (en) * | 2019-05-29 | 2019-09-10 | 惠科股份有限公司 | The white balance parameter generation method and display device of four color pixels |
-
2020
- 2020-05-21 CN CN202010437108.2A patent/CN111641820B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533611A (en) * | 2008-03-10 | 2009-09-16 | 奇美电子股份有限公司 | Liquid crystal display panel, liquid crystal display device and control method thereof |
| US20100007595A1 (en) * | 2008-07-08 | 2010-01-14 | Chi Mei Optoelectronics Corp. | Driving method for liquid crystal panel and lcd |
| CN103730096A (en) * | 2013-12-31 | 2014-04-16 | 深圳市华星光电技术有限公司 | White balance adjusting method and system and LCD manufacturing method |
| CN105263010A (en) * | 2015-11-26 | 2016-01-20 | 深圳市华星光电技术有限公司 | Automatic white balance method and system |
| CN107360410A (en) * | 2017-07-10 | 2017-11-17 | 广东欧珀移动通信有限公司 | Method for controlling white balance, device and terminal device |
| CN107358933A (en) * | 2017-09-15 | 2017-11-17 | 深圳市华星光电技术有限公司 | The white balance method and device of liquid crystal display panel |
| CN107945756A (en) * | 2017-11-21 | 2018-04-20 | 深圳市华星光电技术有限公司 | The white balance method and device of liquid crystal display panel |
| CN107799086A (en) * | 2017-11-22 | 2018-03-13 | 深圳市华星光电技术有限公司 | The over-driving method and device of liquid crystal display panel |
| CN110223650A (en) * | 2019-05-29 | 2019-09-10 | 惠科股份有限公司 | The white balance parameter generation method and display device of four color pixels |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11443711B2 (en) * | 2020-04-01 | 2022-09-13 | Tcl China Star Optoelectronics Technology Co., Ltd. | Liquid crystal display panel improving flicker problem due to difference of grey voltages and refreshing frequency |
| CN114765017A (en) * | 2021-01-13 | 2022-07-19 | 辉达公司 | Pixel degradation tracking and compensation for display technology |
| CN113707069A (en) * | 2021-08-30 | 2021-11-26 | Tcl华星光电技术有限公司 | Time schedule controller, display terminal and display compensation method |
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|---|---|
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