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CN112447148B - Display device and correction method thereof - Google Patents

Display device and correction method thereof Download PDF

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Publication number
CN112447148B
CN112447148B CN201910826618.6A CN201910826618A CN112447148B CN 112447148 B CN112447148 B CN 112447148B CN 201910826618 A CN201910826618 A CN 201910826618A CN 112447148 B CN112447148 B CN 112447148B
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gray scale
brightness value
display device
driving voltage
liquid crystal
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CN112447148A (en
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李瑞莲
聂春扬
李振东
杨昆
胡胜华
戴珂
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

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

Abstract

The embodiment of the invention provides a correction method of a display device and the display device, relates to the technical field of display, and can ensure that the display device obtains the maximum brightness while ensuring the color temperature. A correction method of a display device includes: obtaining the corresponding driving voltage V of the liquid crystal display panel under the gray scale M-NM‑N(ii) a At gray scale M, driving voltage VM‑NDriving the liquid crystal display panel as a reference driving voltage to obtain a reference brightness value corresponding to the display device; acquiring a third corresponding relation between the gray scale and the reference brightness value and the reference driving voltage of the liquid crystal display panel according to the reference brightness value corresponding to the gray scale M; increasing the reference driving voltage under the gray scale M, and judging whether the color temperature of the display device can be adjusted to a preset target color temperature range; if yes, changing N, and circulating the steps until the judgment is negative; and if not, storing the third corresponding relation in the last cycle.

Description

Display device and correction method thereof
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display device and a correction method thereof.
Background
At present, a double-layer liquid crystal display panel (Dual Cell) product is concerned by the market because the double-layer liquid crystal display panel has the characteristics of ultrahigh contrast ratio which is larger than 40000:1, color depth which is as high as 16bit, million-level regional dimming realization and the like.
For the color temperature of the product, the brightness of the corresponding three-primary-color sub-pixels is reduced according to the measured initial color temperature value in the prior art to obtain the target color coordinate, so that the purpose of adjusting the color temperature is achieved.
Although the existing color temperature adjusting method can meet the requirement of color temperature, the overall brightness of the display device is sacrificed, and the quality of the product is reduced.
Disclosure of Invention
Embodiments of the present invention provide a correction method for a display device and a display device, which can enable the display device to obtain maximum brightness while ensuring color temperature.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in one aspect, a method for calibrating a display device is provided, including: s10, obtaining a driving voltage V corresponding to the liquid crystal display panel under the gray scale M-N according to the one-to-one correspondence relationship between the gray scale and the brightness value of the display device and the driving voltage of the liquid crystal display panel in the display deviceM-N(ii) a The display device also comprises a light control panel arranged on the light incident side of the liquid crystal display panel; the light control panel is configured to control a backlight to be directed to the liquid crystal display panel therethrough; the gray scale range of the display device is 0-M, and M is 2k-1, 0 < N < M, N and k being positive integers; s20, driving the voltage V at the gray scale MM-NDriving the liquid crystal display panel as a reference driving voltage to obtain a reference brightness value corresponding to the display device; s30, acquiring a third corresponding relation between the gray scale, the reference brightness value and the reference driving voltage of the liquid crystal display panel according to the reference brightness value corresponding to the gray scale M; s40, increasing the reference driving voltage under the gray scale M, and judging whether the color temperature of the display device can be adjusted to a preset target color temperature range; s50, if yes, changing N, and circulating S10-S40 until the judgment is negative; and S60, if not, storing the third corresponding relation in the last cycle. And S70, for each gray scale, adjusting the driving voltage of the liquid crystal display panel in the display device to the reference driving voltage according to the third corresponding relation, so that the brightness value of the display device under each gray scale is adjusted to the reference brightness value.
Optionally, if the color temperature can be adjusted to be within a preset target color temperature range, changing N, and looping through S10-S40 until the determination is negative, including: if the color temperature can be adjusted to the preset target color temperature range, acquiring a brightness value corresponding to the display device as a first brightness value when the color temperature is adjusted to the preset target color temperature range; searching and obtaining a gray scale corresponding to the first brightness value according to the one-to-one correspondence relationship between the gray scale and the brightness value of the display device and the driving voltage of a liquid crystal display panel in the display device; setting the gray scale M-N equal to the gray scale corresponding to the first brightness value, and circulating S10-S40 until judging no.
Optionally, if the color temperature can be adjusted to be within a preset target color temperature range, changing N, and looping through S10-S40 until the judgment is negative, including: if the color temperature can be adjusted to the preset target color temperature range, N is reduced by 1, and S10-S40 are circulated until the judgment is negative.
Optionally, before S10, the method for obtaining a color temperature correction relationship further includes: adjusting the driving voltage of the liquid crystal display panel under each gray scale to enable the brightness value corresponding to the liquid crystal display panel under each gray scale to meet the first corresponding relation between the gray scale and the brightness value; wherein the first corresponding relationship between gray scale and brightness value is
Figure BDA0002189290770000021
GAM is a preset gamma value, LMAXIs the brightness value corresponding to the maximum gray scale MAX, LXIs the brightness value corresponding to the X-th gray scale, wherein X is an integer.
Optionally, before adjusting the driving voltage of the liquid crystal display panel at each gray scale to make the brightness value corresponding to the liquid crystal display panel at each gray scale satisfy the first corresponding relationship between the gray scale and the brightness value, the method for obtaining the color temperature correction relationship further includes: adjusting the driving voltage of the light control panel under each gray scale to enable the brightness value corresponding to the light control panel under each gray scale to meet a second corresponding relation between the gray scale and the brightness value; wherein the second corresponding relationship between gray scale and brightness value is
Figure BDA0002189290770000022
L′MAXIs a maximum gray scale MAX pairRespective brightness value, L'XThe brightness value corresponding to the Xth gray scale.
Optionally, obtaining a third corresponding relationship between the gray scale, the reference brightness value, and the reference driving voltage of the liquid crystal display panel according to the reference brightness value corresponding to the gray scale M includes: according to the reference brightness value corresponding to the gray scale M, using
Figure BDA0002189290770000031
Calculating to obtain a reference brightness value corresponding to the display device under each gray scale; l ″)MAXA reference brightness value, L ″, corresponding to the maximum gray level MAXXThe reference brightness value is corresponding to the Xth gray scale; and acquiring a reference driving voltage corresponding to the liquid crystal display panel according to the reference brightness value under each gray scale.
In another aspect, there is also provided a display device including: the device comprises a liquid crystal display panel, a light control panel, a memory and a processor; the memory stores a computer program executable on the processor and stores results; the processor implements the correction method of the display device as described above when executing the computer program.
The embodiment of the invention provides a correction method of a display device and the display device, which are used for obtaining a driving voltage V corresponding to a gray scale M-N liquid crystal display panelM-NAnd at the gray level M, the driving voltage V is setM-NDriving the liquid crystal display panel as a reference driving voltage to obtain a reference brightness value corresponding to the display device; then, according to a reference brightness value corresponding to the gray scale M, acquiring a third corresponding relation between the gray scale, the reference brightness value and a reference driving voltage of the liquid crystal display panel, on the basis, increasing the reference driving voltage under the gray scale M, judging whether the color temperature of the display device can be adjusted to a preset target color temperature range, if so, indicating that the brightness of the display device can be further improved, repeating the steps after changing N until the color temperature cannot be adjusted to the preset target color temperature range, indicating that the brightness of the display device reaches the highest value, storing the third corresponding relation between the gray scale, the reference brightness value and the reference driving voltage of the liquid crystal display panel in the last circulation, and according to the third corresponding relationAnd adjusting the driving voltage of the liquid crystal display panel in the display device to the reference driving voltage according to the three corresponding relations, so that the brightness value of the display device under each gray scale is adjusted to the reference brightness value, and the display device not only meets the requirement of color temperature, but also obtains the maximum brightness.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for obtaining a color temperature correction relationship according to an embodiment of the present invention;
fig. 2a is a schematic structural diagram of a display device according to an embodiment of the present invention;
FIG. 2b is a schematic top view of the light control panel shown in FIG. 2 a;
fig. 3 is a schematic flow chart of another method for obtaining a color temperature correction relationship according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of a method for obtaining a color temperature correction relationship according to another embodiment of the present invention;
fig. 5 is a schematic flowchart of another method for obtaining a color temperature correction relationship according to an embodiment of the present invention;
fig. 6 is a schematic flowchart of another method for obtaining a color temperature correction relationship according to an embodiment of the present invention;
fig. 7 is a schematic flowchart of another method for obtaining a color temperature correction relationship according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another display device according to an embodiment of the present invention.
Reference numerals:
1-a display device; 10-a liquid crystal display panel; 20-a light control panel; 21-a light control unit; 30-a memory; 40-a processor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
In the principle of color temperature adjustment, for any target color temperature value, the driving voltage corresponding to the pixels in the liquid crystal display panel can be increased at the same time, or the driving voltage corresponding to the pixels can be decreased at the same time, so that the color temperature of the liquid crystal display panel can reach the target color temperature value.
However, in the prior art, when the color temperature is adjusted, the liquid crystal display panel is usually lit at the maximum gray scale, and at this time, the pixel driving voltage is already the maximum value, and accordingly, the liquid crystal display panel has already reached the maximum brightness, and the color temperature cannot be adjusted by increasing the pixel driving voltage, so that the color temperature can only reach the target color temperature value by reducing the pixel driving voltage. Here, the driving voltage of the pixel is reduced, and the corresponding brightness value is reduced, thereby sacrificing the brightness of the product.
In view of the above problems, an embodiment of the present invention provides a method for calibrating a display device, as shown in fig. 1, including:
s10, obtaining the driving voltage V corresponding to the liquid crystal display panel under the gray scale M-N according to the one-to-one correspondence of the gray scale and the brightness value of the display device and the driving voltage of the liquid crystal display panel in the display deviceM-N。
As shown in fig. 2a, the display device 1 further includes a light control panel 20 disposed on the light incident side of the liquid crystal display panel 10; the light control panel 20 is configured to control the backlight to be directed to the liquid crystal display panel 10 therethrough; the gray scale range of the display device is 0-M, and M is 2k-1, 0 < N < M, N and k being positive integers.
As shown in fig. 2b, the light control panel 20 includes a plurality of light control cells 21, each light control cell 21 is defined by signal lines in the horizontal direction and in the vertical direction, and the signal lines are routed as broken lines.
It should be noted that the gray scale range depends on the number of bits of data transmission in the display device. If the number of bits of the data transmission is 6, k is 6, and M is 26-1 is 63, the gray scale range is 0-63, and N is more than 0 and less than 63; if the number of bits of the data transmission is 8, k is 8, and M is 28-1 is 255, the gray scale range is 0-255, and then 0 < N < 255; if the number of bits of the data transmission is 10, k is 10, and M is 2101023, the gray scale ranges from 0 to 1023, and 0 < N < 1023.
Here, the size of N may be set as needed at the time of the first acquisition, and the present invention is not limited thereto.
S20, driving the voltage V at the gray scale MM-NAnd driving the liquid crystal display panel as a reference driving voltage to acquire a reference brightness value corresponding to the display device.
S30, obtaining a third corresponding relation between the gray scale, the reference brightness value and the reference driving voltage of the liquid crystal display panel according to the reference brightness value corresponding to the gray scale M.
S40, increasing the reference driving voltage under the gray scale M, and judging whether the color temperature of the display device can be adjusted to the preset target color temperature range.
It is understood that increasing the reference driving voltage at the gray level M means increasing the driving voltage V at the gray level MM-NIs increased on the basis of (1).
The target color temperature range may be set as required, but the present invention is not limited thereto.
S50, if yes, changing N, and circulating S10-S40 until the judgment is negative.
And S60, if not, storing the third corresponding relation in the last cycle.
And S70, for each gray scale, adjusting the driving voltage of the liquid crystal display panel in the display device to the reference driving voltage according to the third corresponding relation, so that the brightness value of the display device under each gray scale is adjusted to the reference brightness value.
Based on the above description, a correction method of a display device is provided below to clearly describe its implementation process.
For example, if the gray scale range of the display device is 0 to 255, M is 255, and N is 10.
The first step is as follows: obtaining the driving voltage V corresponding to the liquid crystal display panel under the gray scale 245 according to the one-to-one correspondence relationship between the gray scale and the brightness value of the display device and the driving voltage of the liquid crystal display panel in the display device245＝16v。
The second step is that: under the gray scale of 255, the liquid crystal display panel is driven by using 16v as a reference driving voltage, and the reference brightness value corresponding to the display device is acquired to be Lp。
The third step: since the driving voltage corresponding to the maximum gray scale 255 is changed, the reference luminance value L corresponding to the gray scale 255 needs to be changed againpAnd calculating a reference brightness value under each gray scale, and acquiring a reference driving voltage of the corresponding liquid crystal display panel, wherein the one-to-one correspondence relationship between the gray scales, the reference brightness values and the reference driving voltage of the liquid crystal display panel is a third correspondence relationship.
The fourth step: at gray level of 255, with reference driving voltage V'255＝V245And increasing the color temperature of the display device on the basis of 16v to judge whether the color temperature of the display device can be adjusted to be within a preset target color temperature range.
The fifth step: if the brightness of the liquid crystal display panel still has a space for continuously increasing, N needs to be adjusted to continuously loop the first step to the fourth step to acquire the third corresponding relationship again in order to maximize the brightness even when the color temperature of the display device is ensured.
And a sixth step: if not, the driving voltage of the liquid crystal display panel reaches the maximum value, the upward adjustment cannot be continued, and the brightness also reaches the maximum value, at the moment, a third corresponding relation between the gray scale, the reference brightness value and the reference driving voltage of the liquid crystal display panel is stored;
the seventh step: and aiming at each gray scale, adjusting the driving voltage of the liquid crystal display panel in the display device to the reference driving voltage according to the third corresponding relation, so that the brightness value of the display device under each gray scale is adjusted to the reference brightness value, and the brightness of the display device is the maximum under the condition of meeting the color temperature.
Embodiments of the present invention provide a method for calibrating a display device by obtaining a driving voltage V corresponding to a gray scale M-N LCD panelM-NAnd at the gray level M, the driving voltage V is setM-NDriving the liquid crystal display panel as a reference driving voltage to obtain a reference brightness value corresponding to the display device; then, according to the reference brightness value corresponding to the gray scale M, obtaining a third corresponding relation between the gray scale, the reference brightness value and the reference driving voltage of the liquid crystal display panel, on the basis, increasing the reference driving voltage under the gray scale M, judging whether the color temperature of the display device can be adjusted to a preset target color temperature range, if so, indicating that the brightness of the display device can be further improved, repeating the steps after changing N until the color temperature can not be adjusted to the preset target color temperature range, indicating that the brightness of the display device reaches the maximum, at the moment, storing the third corresponding relation between the gray scale, the reference brightness value and the reference driving voltage of the liquid crystal display panel in the last circulation, adjusting the driving voltage of the liquid crystal display panel in the display device to the reference driving voltage according to the third corresponding relation, so that the brightness value of the display device under each gray scale is adjusted to the reference brightness value, thereby the display device can meet the requirement of color temperature and obtain maximum brightness.
Optionally, as shown in fig. 3, before S10, the method for obtaining a color temperature correction relationship further includes:
and S1, adjusting the driving voltage of the liquid crystal display panel under each gray scale to enable the brightness value corresponding to the liquid crystal display panel under each gray scale to meet the first corresponding relation between the gray scale and the brightness value.
Wherein the first corresponding relationship between gray scale and brightness value is
Figure BDA0002189290770000071
GAM is a preset gamma value, LMAXIs the brightness value corresponding to the maximum gray scale MAX, LXIs the brightness value corresponding to the X-th gray scale, wherein X is an integer.
It should be noted that, since human eyes are more sensitive to the change of low brightness and relatively insensitive to the change of high brightness, in order to satisfy the visual effect, when the liquid crystal display panel displays, the corresponding relationship between gray scales and brightness values is not linear, but nonlinear, that is, the brightness change is small at low gray scales and is large at high gray scales, and this nonlinear curve is generally called as a gamma curve.
Based on this, for the liquid crystal display panel just produced, if the gray scale range is 0 to 255, the brightness variation condition under all gray scales does not satisfy the visual requirement, so the driving voltage under each gray scale needs to be adjusted according to the preset gamma value, for example, the gamma value is 2.2, so that the gray scale and the brightness value satisfy the first corresponding relationship, that is, the gray scale and the brightness value satisfy the first corresponding relationship
Figure BDA0002189290770000081
Optionally, as shown in fig. 4, before S1, the method for obtaining a color temperature correction relationship further includes:
and S2, adjusting the driving voltage of the light control panel under each gray scale to make the brightness value corresponding to the light control panel under each gray scale meet the second corresponding relation between the gray scale and the brightness value.
Wherein the second corresponding relationship between gray scale and brightness value is
Figure BDA0002189290770000082
L′MAXIs the brightness value, L ', corresponding to the maximum gray scale MAX'XThe brightness value corresponding to the Xth gray scale.
For the light control panel just produced, if the gray scale range is 0-255, the brightness change condition under all gray scales does not meet the visual requirement, so the driving voltage under each gray scale needs to be adjusted according to the preset gamma value, so that the gray scale and the brightness value meet the second corresponding relation.
Optionally, as shown in fig. 5, in the step S30, obtaining a third corresponding relationship between a gray scale, a reference luminance value and a reference driving voltage of the liquid crystal display panel according to the reference luminance value corresponding to the gray scale M includes:
s301, according to the reference brightness value corresponding to the gray scale M, using
Figure BDA0002189290770000083
And calculating to obtain a reference brightness value corresponding to each gray scale display device.
Wherein, L ″)MAXA reference brightness value, L ″, corresponding to the maximum gray level MAXXThe reference brightness value corresponding to the Xth gray scale.
S302, obtaining a reference driving voltage corresponding to the liquid crystal display panel according to the reference brightness value under each gray scale.
Illustratively, according to the example in S60 above, the driving voltage V is set at the gray level 255245Driving the LCD panel with 16v as reference driving voltage, and obtaining a corresponding reference brightness value Lp。
At this time, the maximum gray level MAX is 255, and the corresponding reference brightness value L ″MAX＝LpAccording to
Figure BDA0002189290770000084
The reference brightness value corresponding to the display device under each gray scale can be calculated.
It should be noted that, if the display device includes a liquid crystal display panel and a light control panel, for each gray scale, a luminance value corresponding to the light control panel is subtracted from a reference luminance value of the display device, so as to obtain a luminance value corresponding to the liquid crystal display panel, and according to a correspondence between the luminance value and a driving voltage, a driving voltage of the liquid crystal display panel corresponding to the luminance value can be obtained as a reference driving voltage.
Alternatively, as shown in fig. 6, in S50, if the color temperature can be adjusted to be within the preset target color temperature range, changing N, and looping through S10 to S40 until determining no, includes:
s501, if the color temperature can be adjusted to the preset target color temperature range, when the color temperature is adjusted to the preset target color temperature range, the brightness value corresponding to the display device is obtained and used as a first brightness value.
S502, according to the one-to-one correspondence relationship between the gray scale and the brightness value of the display device and the driving voltage of the liquid crystal display panel in the display device, the gray scale corresponding to the first brightness value is searched and obtained.
It should be noted that, if the first luminance value does not find the corresponding gray scale in the one-to-one correspondence relationship between the gray scale, the luminance value and the driving voltage of the liquid crystal display panel in the display device, the maximum value of all gray scales corresponding to the luminance value smaller than the first luminance value is found and is used as the gray scale corresponding to the first luminance value.
For example, if the corresponding gray scale cannot be found when the first luminance value is 60nit, the gray scale corresponding to the luminance value smaller than the first luminance value is found, for example, 142 gray scale corresponding to 59.5nit, 140 gray scale corresponding to 59nit, and 134 gray scale corresponding to 58nit are found, and the largest 142 gray scale is taken as the gray scale corresponding to the first luminance value 60 nit.
S503, setting the gray scale M-N equal to the gray scale corresponding to the first brightness value, and repeating the steps S10-S40 until the judgment is negative.
For example, according to the first step to the fourth step in the example of S60, at the gray level of 255, the liquid crystal display panel is increased based on the reference driving voltage 16v, and if the reference driving voltage is measured to be increased to 16.5v, the color temperature of the display device is adjusted to be within the preset target color temperature range, and at this time, the brightness of the display device is LqAnd the L isqAs the first luminance value.
According to the one-to-one correspondence relationship between the gray scale and the brightness value of the display device and the driving voltage of the liquid crystal display panel in the display device, the gray scale corresponding to the first brightness value is found and obtained, for example, 247. The first brightness value LqFor the corresponding gray level 247, M-N is 247, M is 255, and N is 8.
Alternatively, as shown in fig. 7, in the step S50, if the color temperature can be adjusted to be within the preset target color temperature range, changing N, and looping through S10 to S40 until determining no, includes:
if the color temperature can be adjusted to the preset target color temperature range, N is reduced by 1, and S10-S40 are circulated until the judgment is negative.
For example, as can be seen from the first step to the fourth step in the example of S60, when N is 10, the liquid crystal display panel is driven with the driving voltage 16v of the gray scale 245 as the reference driving voltage at the gray scale 255, and then the reference driving voltage is increased, if the color temperature can be adjusted to the preset target color temperature range, it is indicated that the brightness of the liquid crystal display panel can be further increased, and if the preset N value is larger, N is decreased by 1, that is, N is 9, the first step to the fourth step are circulated, and if the color temperature can be adjusted to the preset target color temperature range, N is further decreased by 1, that is, N is 8, the first step to the fourth step are circulated, and so on until the determination is negative.
An embodiment of the present invention also provides a display device 1, as shown in fig. 8, including: a liquid crystal display panel 10, a light control panel 20, and a memory 30 and a processor 40;
the memory 30 stores a computer program executable on the processor 40 and stores results; the processor 40, when executing the computer program, implements the correction method of the display apparatus 1 as described above.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (6)

1. A method for calibrating a display device, comprising:
s10, obtaining a driving voltage V corresponding to the liquid crystal display panel under the gray scale M-N according to the one-to-one correspondence relationship between the gray scale and the brightness value of the display device and the driving voltage of the liquid crystal display panel in the display deviceM-N(ii) a The display device also comprises a light control panel arranged at the light incidence side of the liquid crystal display panel; the light control panel is configured to control a backlight to be directed to the liquid crystal display panel therethrough; the gray scale range of the display device is 0-M, and M is 2k-1, 0 < N < M, N and k being positive integers;
s20, driving the voltage V at the gray scale MM-NAs a reference driveDriving the liquid crystal display panel by voltage to obtain a reference brightness value corresponding to the display device;
s30, acquiring a third corresponding relation between the gray scale, the reference brightness value and the reference driving voltage of the liquid crystal display panel according to the reference brightness value corresponding to the gray scale M;
s40, increasing the reference driving voltage under the gray scale M, and judging whether the color temperature of the display device can be adjusted to a preset target color temperature range;
s50, if yes, reducing N by 1, and circulating S10-S40 until the judgment is negative;
s60, if not, storing the third corresponding relation in the last cycle;
and S70, for each gray scale, adjusting the driving voltage of the liquid crystal display panel in the display device to the reference driving voltage according to the third corresponding relation, so that the brightness value of the display device under each gray scale is adjusted to the reference brightness value.
2. The method of claim 1, wherein if the color temperature can be adjusted to a predetermined target color temperature range, N is decreased by 1, and the steps from S10 to S40 are repeated until the determination is negative, comprising:
if the color temperature can be adjusted to the preset target color temperature range, acquiring a brightness value corresponding to the display device as a first brightness value when the color temperature is adjusted to the preset target color temperature range;
searching to obtain a gray scale corresponding to the first brightness value according to the one-to-one correspondence relationship between the gray scale and the brightness value of the display device and the driving voltage of a liquid crystal display panel in the display device;
setting the gray scale M-N equal to the gray scale corresponding to the first brightness value, and circulating S10-S40 until judging no.
3. The method for correcting a display device according to claim 1, wherein before S10, the method further comprises:
adjusting the driving voltage of the liquid crystal display panel under each gray scale to enable the brightness value corresponding to the liquid crystal display panel under each gray scale to meet the first corresponding relation between the gray scale and the brightness value;
wherein the first corresponding relationship between gray scale and brightness value is
Figure FDA0003499771950000021
GAM is a preset gamma value, LMAXIs the brightness value corresponding to the maximum gray scale MAX, LXThe brightness value corresponding to the X-th gray scale, wherein X is an integer.
4. The method of claim 1, wherein before the driving voltage of the liquid crystal display panel is adjusted at each gray level to satisfy the first correspondence relationship between gray level and brightness value, the method further comprises:
adjusting the driving voltage of the light control panel under each gray scale to enable the brightness value corresponding to the light control panel under each gray scale to meet a second corresponding relation between the gray scale and the brightness value;
wherein the second corresponding relationship between gray scale and brightness value is
Figure FDA0003499771950000022
L′MAXIs the brightness value, L ', corresponding to the maximum gray scale MAX'XThe brightness value corresponding to the Xth gray scale.
5. The method of claim 1, wherein obtaining a third corresponding relationship between a gray level, a reference luminance value and a reference driving voltage of the LCD panel according to a reference luminance value corresponding to the gray level M comprises:
according to the reference brightness value corresponding to the gray scale M, using
Figure FDA0003499771950000023
Calculating to obtain the corresponding reference brightness of the display device under each gray scaleA value; l ″)MAXA reference brightness value, L ″, corresponding to the maximum gray level MAXXThe reference brightness value is corresponding to the Xth gray scale;
and acquiring a reference driving voltage corresponding to the liquid crystal display panel according to the reference brightness value under each gray scale.
6. A display device, comprising: the LCD device comprises a liquid crystal display panel, a light control panel, a memory and a processor;
the memory stores a computer program executable on the processor and stores results;
the processor, when executing the computer program, implements a correction method for a display device according to any one of claims 1-5.
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CN114928731B (en) * 2022-05-05 2023-11-28 中国电子科技集团公司第十四研究所 Intelligent color interactive display method and device
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101443834A (en) * 2006-05-24 2009-05-27 松下电器产业株式会社 Color temperature correction device and display device
CN107146565A (en) * 2017-04-26 2017-09-08 广州视源电子科技股份有限公司 Method and device for calibrating Gamma curve of display based on DICOM curve
CN107545869A (en) * 2017-10-17 2018-01-05 努比亚技术有限公司 Screen color temp method of adjustment, mobile terminal and computer-readable recording medium
CN110070841A (en) * 2019-03-26 2019-07-30 深圳市嘉利达专显科技有限公司 A kind of adjusting process of display screen, device and electronic equipment

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI377536B (en) * 2007-12-28 2012-11-21 Himax Tech Ltd Method to adjust gamma table by gamma curve and color temperature curve
KR101679360B1 (en) * 2010-08-05 2016-11-25 삼성디스플레이 주식회사 An apparatus and a method for generating gray-scale voltage, and an organic electroluminescent display
CN106940993B (en) * 2017-05-23 2019-02-05 京东方科技集团股份有限公司 A kind of display bearing calibration and system
CN107578755B (en) * 2017-09-30 2019-09-17 晶晨半导体(上海)股份有限公司 A kind of bearing calibration of screen intensity and colour temperature
CN108615511B (en) * 2018-06-28 2020-09-01 深圳市华星光电技术有限公司 Display method and display device
CN109119046B (en) * 2018-09-10 2020-06-05 深圳市华星光电技术有限公司 Adjusting system and adjusting method for gray scale brightness and memory
CN109979415B (en) * 2019-04-24 2020-12-08 深圳市华星光电半导体显示技术有限公司 Method and system for converting RGB (red, green and blue) into RGBW (red, green and blue)

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101443834A (en) * 2006-05-24 2009-05-27 松下电器产业株式会社 Color temperature correction device and display device
CN107146565A (en) * 2017-04-26 2017-09-08 广州视源电子科技股份有限公司 Method and device for calibrating Gamma curve of display based on DICOM curve
CN107545869A (en) * 2017-10-17 2018-01-05 努比亚技术有限公司 Screen color temp method of adjustment, mobile terminal and computer-readable recording medium
CN110070841A (en) * 2019-03-26 2019-07-30 深圳市嘉利达专显科技有限公司 A kind of adjusting process of display screen, device and electronic equipment

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