CN113470575A - Pressure drop compensation method and device - Google Patents

Pressure drop compensation method and device Download PDF

Info

Publication number
CN113470575A
CN113470575A CN202110719163.5A CN202110719163A CN113470575A CN 113470575 A CN113470575 A CN 113470575A CN 202110719163 A CN202110719163 A CN 202110719163A CN 113470575 A CN113470575 A CN 113470575A
Authority
CN
China
Prior art keywords
display
voltage drop
drop compensation
brightness
display module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110719163.5A
Other languages
Chinese (zh)
Other versions
CN113470575B (en
Inventor
朱家明
李永岗
郗文远
彭春生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei Visionox Technology Co Ltd
Original Assignee
Hefei Visionox Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hefei Visionox Technology Co Ltd filed Critical Hefei Visionox Technology Co Ltd
Priority to CN202110719163.5A priority Critical patent/CN113470575B/en
Publication of CN113470575A publication Critical patent/CN113470575A/en
Application granted granted Critical
Publication of CN113470575B publication Critical patent/CN113470575B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The present application relates to a method and apparatus for compensating for pressure drop. The method comprises the following steps: acquiring the brightness value of each display unit in the target display module; determining brightness comparison results of at least two display areas in the target display module based on the brightness values of all display units in the target display module, wherein each display area comprises at least one display unit; and performing voltage drop compensation on each display unit in the target display module by adopting the voltage drop compensation scheme corresponding to the brightness comparison results of at least two display areas in the target display module based on the corresponding relation between the brightness comparison result and the voltage drop compensation scheme. The method is suitable for mass production.

Description

Pressure drop compensation method and device
Technical Field
The present disclosure relates to display technologies, and in particular, to a method and an apparatus for compensating for voltage drop.
Background
An OLED (Organic Light Emitting Display) is not only Light and thin, low in power consumption, high in brightness, good in luminance, and capable of displaying pure black, but also can be curved, and is known as a "illusion Display". An Organic Light Emitting Diode (OLED) in an Organic Light Emitting display belongs to a current type Organic Light Emitting device, and a Driver IC (driving chip) supplies a voltage through a metal wire.
The IR Drop (current resistance Drop) caused by the self-resistance of the metal wires between the organic light emitting diodes and the driving chip at different positions is different, which results in different brightness of the organic light emitting diodes at different positions. In the conventional technology, the respective brightness distribution condition of each display module formed by a plurality of organic light emitting diodes can be acquired, and an IR Drop compensation scheme for the respective brightness distribution condition can be formulated correspondingly, so that the brightness uniformity of each display module is improved.
However, in the conventional technology, each display module sets up an IR Drop compensation scheme, and a large number of display modules need to set up a large number of IR Drop compensation schemes, so that the efficiency is low, the cost is high, and the method is not suitable for mass production products.
Disclosure of Invention
In view of the above, it is necessary to provide a method and an apparatus for compensating for a voltage drop, which can be applied to mass production.
A method of pressure drop compensation, the method comprising:
acquiring the brightness value of each display unit in the target display module;
determining brightness comparison results of at least two display areas in the target display module based on the brightness values of all display units in the target display module, wherein each display area comprises at least one display unit;
and performing voltage drop compensation on each display unit in the target display module by adopting the voltage drop compensation scheme corresponding to the brightness comparison results of at least two display areas in the target display module based on the corresponding relation between the brightness comparison result and the voltage drop compensation scheme.
In one embodiment, the performing voltage drop compensation on each display unit in the target display module by using the voltage drop compensation schemes corresponding to the brightness comparison results of at least two display areas in the target display module based on the correspondence between the brightness comparison result and the voltage drop compensation scheme includes:
when the brightness comparison result of a first display area and a second display area in the target display module is that the brightness value of the first display area is smaller than that of the second display area, performing voltage drop compensation on each display unit in the target display module by adopting a first voltage drop compensation scheme, wherein a voltage drop compensation parameter of the first display area in the first voltage drop compensation scheme is larger than that of the second display area;
and when the brightness comparison result of the first display area and the second display area in the target display module is that the brightness value of the first display area is greater than that of the second display area, performing voltage drop compensation on each display unit in the target display module by adopting a second voltage drop compensation scheme, wherein the voltage drop compensation parameter of the first display area in the second voltage drop compensation scheme is smaller than that of the second display area.
In one embodiment, the distance between the display unit and the driving chip in the first display area is greater than the distance between the display unit and the driving chip in the second display area.
In one embodiment, the first voltage drop compensation scheme is determined by voltage drop compensation parameters of each display unit in a plurality of first sample display modules, and the brightness value of a first display area in each first sample display module is smaller than that of a second display area; the second voltage drop compensation scheme is determined by voltage drop compensation parameters of all display units in a plurality of second sample display modules, and the brightness value of a first display area in each second sample display module is larger than that of a second display area.
In one embodiment, the voltage drop compensation parameter of each display unit in the first voltage drop compensation scheme is a median of the voltage drop compensation parameters of the corresponding display units in the plurality of first sample display modules, and the voltage drop compensation parameter of each display unit in the second voltage drop compensation scheme is a median of the voltage drop compensation parameters of the corresponding display units in the plurality of second sample display modules;
or the voltage drop compensation parameter of each display unit in the first voltage drop compensation scheme is an average value of the voltage drop compensation parameters of the corresponding display units in the plurality of first sample display modules, and the voltage drop compensation parameter of each display unit in the second voltage drop compensation scheme is an average value of the voltage drop compensation parameters of the corresponding display units in the plurality of second sample display modules.
In one embodiment, the determining the brightness comparison result of at least two display areas in the target display module based on the brightness value of each display unit in the target display module includes:
determining brightness values of a first display area and a second display area in the target display module based on the brightness values of all display units in the target display module;
and determining the brightness comparison result of the first display area and the second display area in the target display module based on the brightness values of the first display area and the second display area in the target display module.
In one embodiment, the luminance values of the first display region and the second display region are the maximum values of the luminance values of the display units in the first display region and the second display region;
or the brightness values of the first display area and the second display area are the median of the brightness values of the display units in the first display area and the second display area;
or the brightness values of the first display area and the second display area are the average value of the brightness values of the display units in the first display area and the second display area.
In one embodiment, the performing, based on the correspondence between the brightness comparison result and the voltage drop compensation scheme, the voltage drop compensation for each display unit in the target display module by using the voltage drop compensation scheme corresponding to the brightness comparison result of at least two display areas in the target display module includes:
determining the brightness uniformity of the target display module based on the brightness value of each display unit in the target display module;
and if the brightness uniformity of the target display module is smaller than or equal to a set threshold value, performing voltage drop compensation on each display unit in the target display module by adopting a voltage drop compensation scheme corresponding to the brightness comparison results of at least two display areas in the target display module based on the corresponding relation between the brightness comparison result and the voltage drop compensation scheme.
In one embodiment, the performing, based on the correspondence between the brightness comparison result and the voltage drop compensation scheme, the voltage drop compensation for each display unit in the target display module by using the voltage drop compensation scheme corresponding to the brightness comparison result of at least two display areas in the target display module includes:
selecting a voltage drop compensation scheme corresponding to the brightness comparison results of at least two display areas in the target display module based on the corresponding relationship between the brightness comparison results and the voltage drop compensation scheme, wherein the voltage drop compensation scheme comprises voltage drop compensation parameters of each display unit;
acquiring a target brightness value of the target display module;
determining a voltage drop compensation value of a reference display unit based on the target brightness value and a brightness value of the reference display unit in the target display module, wherein the reference display unit is any one display unit in the target display module;
determining a voltage drop compensation value of each display unit in the target display module based on the voltage drop compensation value of the reference display unit and the voltage drop compensation parameter of each display unit in the voltage drop compensation scheme;
and performing voltage drop compensation on each display unit in the display module by using the voltage drop compensation value of each display unit in the target display module.
A pressure drop compensation device, the device comprising:
the acquisition module is used for acquiring the brightness value of each display unit in the target display module;
the determining module is used for determining the brightness comparison result of at least two display areas in the target display module based on the brightness value of each display unit in the target display module, wherein each display area comprises at least one display unit;
and the compensation module is used for performing voltage drop compensation on each display unit in the target display module by adopting the voltage drop compensation scheme corresponding to the brightness comparison results of at least two display areas in the target display module based on the corresponding relation between the brightness comparison result and the voltage drop compensation scheme.
According to the voltage drop compensation method and device, the brightness value of each display unit in the target display module is obtained firstly, then the brightness comparison result of at least two display areas in the target display module is determined based on the brightness value of each display unit in the target display module, each display area comprises at least one display unit, and therefore voltage drop compensation can be carried out on each display unit in the target display module by adopting the voltage drop compensation method corresponding to the brightness comparison result of at least two display areas in the target display module based on the corresponding relation between the brightness comparison result and the voltage drop compensation scheme. As the matched voltage drop compensation scheme is adopted to perform voltage drop compensation on the target display module according to the brightness comparison result between different display areas in the target display module, better voltage drop compensation effect can be achieved, and the brightness uniformity of the target display module is effectively improved. And all target display module assemblies that the luminance comparative result of display area is the same all adopt same pressure drop compensation scheme to compensate, can reduce the formulation time of compensation scheme by a wide margin, simplify the compensation process of target display module assembly, improve the compensation efficiency of target display module assembly, reduce the compensation cost of target display module assembly, can be applicable to the volume production product well.
Drawings
FIG. 1 is a diagram of an exemplary embodiment of a method for compensating for pressure drop;
FIG. 2 is a diagram illustrating voltage drop compensation of a display module with brightness comparison results according to the related art;
FIG. 3 is a diagram illustrating voltage drop compensation of a display module with another brightness comparison result according to the related art;
FIG. 4 is a schematic flow diagram of a pressure drop compensation method according to one embodiment;
FIG. 5 is a diagram illustrating voltage drop compensation for a display module with brightness comparison results according to an embodiment;
FIG. 6 is a diagram illustrating voltage drop compensation for another display module with brightness comparison results according to an embodiment;
FIG. 7 is a schematic flow chart of a pressure drop compensation method according to another embodiment;
FIG. 8 is a schematic flow chart of a pressure drop compensation method in yet another embodiment;
FIG. 9 is a schematic flow chart of a pressure drop compensation method in yet another embodiment;
FIG. 10 is a block diagram of a pressure drop compensation device according to an embodiment;
FIG. 11 is a diagram illustrating an internal structure of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The voltage drop compensation method provided by the application can be applied to the application environment as shown in fig. 1. The display module 10 includes a driving chip 11 and a plurality of display units 12, where the plurality of display units 12 are located on the same side of the driving chip 11 and connected to the driving chip 11 through a metal trace 13. For example, the display units 12 are distributed in an array, and the driving chip 11 is located at one side of the array and connected to each display unit 12 through a metal trace 13. The display unit 12 may be, but is not limited to, an organic light emitting diode. The driving chip 11 provides voltage to the display unit 12 through metal wires, and the voltage controls the brightness of the display unit 12.
As shown in fig. 1, the plurality of display units 12 may be divided into two display areas, a first display area a and a second display area B, respectively. Each display region includes at least one display unit 12, and a distance between the display unit 12 and the driving chip 11 in the first display region a is greater than a distance between the display unit 12 and the driving chip 11 in the second display region B. Because the distance between the display unit 12 and the driving chip 11 is positively correlated with the resistance of the metal wire 13, and the resistance of the metal wire 13 is positively correlated with the IR Drop, theoretically, the brightness of the display unit 12 in the first display area a of each display module 10 is less than the brightness of the display unit 12 in the second display area B, and the voltage Drop compensation parameter of the display unit 12 in the first display area a of each display module 10 is greater than the voltage Drop compensation parameter of the display unit 12 in the second display area B. That is, the comparison results of the brightness of each display region in different display modules 10 and the voltage drop compensation parameter are the same. The difference is that the difference between the compensation parameters of the voltage drop in the first display area a and the second display area B in different display modules 10 is different.
In the related art, enough display modules 10 are taken as samples, the pressure drop compensation parameters of each display unit 12 in each sample are determined, and the pressure drop compensation parameters of each display unit 12 in all the samples are summarized to obtain a pressure drop compensation scheme. For example, the median value of the pressure drop compensation parameter of the same display unit 12 in all samples is taken as the pressure drop compensation parameter of this display unit 12 in the pressure drop compensation scheme. Then all display module assemblies 10 all adopt this voltage drop compensation scheme to carry out the voltage drop compensation, and efficient, with low costs is applicable to the volume production product.
However, the brightness comparison results of the display areas in different display modules 10 are different. For example, due to the influence of the manufacturing process, the luminance of the first display area a in a portion of the display module 10 is greater than the luminance of the second display area B. In fact, the luminance of the first display area a in most of the display modules 10 is smaller than the luminance of the second display area B, and the luminance of the first display area a in a small part of the display modules 10 is greater than the luminance of the second display area B, so that the voltage drop compensation parameter of the first display area a in the voltage drop compensation scheme is greater than the voltage drop compensation parameter of the second display area B. The display module 10 with the luminance of the first display area a smaller than that of the second display area B is compensated by the voltage drop compensation scheme, as shown in fig. 2, the difference between the luminance of the first display area a and the luminance of the second display area B can be reduced, and the luminance uniformity of the display module 10 can be improved. The voltage drop compensation scheme is adopted for the display module 10 with the luminance of the first display area a being greater than that of the second display area B to perform the voltage drop compensation, as shown in fig. 3, the difference between the luminances of the first display area a and the second display area B is further increased, and the luminance uniformity of the display module 10 is reduced.
In view of the above problems, embodiments of the present invention provide a method for compensating for a voltage drop. Firstly, aiming at different brightness comparison results, enough display modules are respectively taken to determine and summarize the voltage drop compensation parameters of each display unit, and a voltage drop compensation scheme corresponding to the brightness comparison results is obtained. And then for any display module, obtaining the brightness value of each display unit in the display module to determine a brightness comparison result, and performing voltage drop compensation on the display module by adopting a voltage drop compensation scheme corresponding to the brightness comparison result of the display module according to the corresponding relation between the brightness comparison result and the voltage drop compensation scheme. Like this, the display module assembly still adopts the pressure drop compensation scheme that obtains in advance to carry out the pressure drop compensation, and is efficient, and is with low costs, is applicable to the volume production product. And the voltage drop compensation scheme adopted by different display modules corresponds to the brightness comparison result of the display module, so that the brightness difference in the display module can be reduced, the brightness uniformity of the display module is improved, and the condition of reducing the brightness uniformity of the display module is avoided.
In one embodiment, as shown in fig. 4, a voltage drop compensation method is provided, which is described by taking the method as an example applied to a computer device connected to the driving chip in fig. 1, and includes the following steps:
step S402, acquiring the brightness value of each display unit in the target display module.
Wherein, the target display module is a display module which does not carry out voltage drop compensation. The display module comprises a driving chip and a plurality of display units, wherein the display units are positioned on the same side of the driving chip and are connected with the driving chip through metal wiring. The display unit may be, but is not limited to, an organic light emitting diode. The driving chip is used for providing driving voltage for the display unit, and the voltage controls the brightness of the display unit.
Specifically, the computer device may obtain the brightness value of each display unit in the target display module through the optical collecting device. The optical acquisition equipment firstly measures the target display module to obtain the brightness value of each display unit in the target display module, and then the obtained brightness value is input or transmitted to the computer equipment, so that the computer equipment can obtain the brightness value of each display unit in the target display module.
Illustratively, the optical acquisition device may be, but is not limited to, a color analyzer, a camera, etc., such as CA 410.
In one implementation, the step S402 may include: and measuring the brightness value of each display unit in the target display module through the color analyzer to obtain the brightness value of each display unit in the target display module.
The color analyzer is provided with a brightness meter, and can measure each display unit in the target display module to obtain the brightness value of the display unit.
The target display module presents a white picture in the measuring process of the color analyzer.
The white picture appears when the red display unit, the green display unit, and the blue display unit are simultaneously illuminated. The target display module presents a white picture, all the display units emit light and the light-emitting brightness is theoretically the same, the brightness of each display unit at the moment is obtained, and the brightness comparison result of each display unit in the target display module can be accurately determined.
In another implementation, the step S402 may include: shooting a presented image of the target display module through a camera; acquiring brightness estimated values of all display units from the displayed image by using image processing software; and determining the brightness actual value corresponding to the brightness estimated value of each display unit based on the corresponding relation between the brightness estimated value and the brightness actual value to obtain the brightness value of each display unit in the target display module.
The brightness estimation value is a brightness value obtained by the image processing software from a shot image of the target display module, and the brightness actual value is a brightness value of the target display module.
The camera can acquire the display images corresponding to all the display units at the same time, the brightness estimation value of each display unit can be acquired from the display images by using image processing software, and the brightness actual value corresponding to the brightness estimation value of each display unit can be determined based on the corresponding relation between the brightness estimation value and the brightness actual value, so that the brightness value of each display unit in the target display module is obtained.
The image presented by the target display module is a white picture, and the brightness comparison result of each display unit in the target display module can be accurately determined.
Illustratively, the image processing software may be, but is not limited to, CAD (Computer Aided Design) software.
In practical application, a camera is adopted to shoot a display image of at least one display module in advance, image processing software is utilized to obtain a brightness estimation value of each display unit from the display image, a color analyzer is adopted to measure a brightness actual value of at least one display unit in the same display module, and the brightness actual value of each display unit corresponds to the brightness estimation value of the corresponding display unit, so that the corresponding relation between the brightness estimation value and the brightness actual value can be established. Then, a camera shoots a presentation image of any one display module, and image processing software is used for obtaining the brightness estimation value of each display unit from the presentation image, namely, the brightness actual value corresponding to the brightness estimation value of each display unit can be determined based on the corresponding relation between the brightness estimation value and the brightness actual value.
Step S404, determining the brightness comparison result of at least two display areas in the target display module group based on the brightness value of each display unit in the target display module group.
Wherein each display area comprises at least one display unit. The brightness of each display area is determined by the brightness value of each display unit included in the display area.
Specifically, this step S404 includes: determining the brightness values of at least two display areas in the target display module based on the brightness values of all display units in the target display module; and determining the brightness comparison result of at least two display areas in the target display module based on the brightness values of at least two display areas in the target display module.
The computer equipment collects the brightness values of all the display units in all the display areas in the target display module to obtain the brightness value of each display area based on the brightness value of each display unit in the target display module, quantizes the brightness of each display area to compare the brightness of each display area, and obtains the brightness comparison result of at least two display areas in the target display module.
Illustratively, the brightness value of the display area may take one of the following values: the maximum value of the brightness values of all the display units in the display area, the median value of the brightness values of all the display units in the display area, and the average value of the brightness values of all the display units in the display area.
The maximum value of the brightness values of all the display units in the same display area is used as the brightness value, so that the difference of the brightness sizes of the display areas can be better reflected, and the brightness comparison result of each display area can be accurately determined. The median or average of the brightness values of all the display units in the same display area is adopted, so that the brightness of each display area can be better reflected, and the brightness comparison result of each display area can be accurately determined.
In practical application, the display module may include two display regions, or may include three display regions, four display regions, five display regions, and the like. The number and the distribution position of the display areas can be divided according to the brightness distribution condition of the display module. For example, the brightness of the display module changes in a direction approaching or departing from the driving chip, and the display module may include two display regions, where a distance between one display region and the driving chip is greater than that between the other display region. For another example, the brightness of the display module changes on the equidistant line of the driving chip, and the display module also includes two display areas, and the distance between the two display areas and the driving chip is the same. For another example, the brightness of the display module changes simultaneously in the direction close to or away from the driving chip and on the equidistant line of the driving chip, and the display module may include three display regions or four display regions, as long as there are two display regions in the direction close to or away from the driving chip, and there are also two display regions on the equidistant line of the driving chip.
When the display module comprises two display areas, the brightness comparison result of each display area in the display module is only two, and the brightness of one display area is greater than that of the other display area and is less than that of the other display area. When the display module comprises more than three display areas, the brightness comparison result of each display area in the display module can be the brightness comparison result between each two display areas in the display module, and can also be the brightness comparison result of all the display areas in the display module.
Step S406, based on the correspondence between the brightness comparison result and the voltage drop compensation scheme, performing voltage drop compensation on each display unit in the target display module by using the voltage drop compensation scheme corresponding to the brightness comparison result of at least two display areas in the target display module.
The brightness comparison result and the voltage drop compensation scheme are in one-to-one correspondence, namely, each brightness comparison result corresponds to one voltage drop compensation scheme. The display module of the same brightness comparison result adopts the same voltage drop compensation scheme to perform voltage drop compensation, and the display module of different brightness comparison results adopts different voltage drop compensation schemes.
For example, the display module includes two display areas, which are the first display area and the second display area respectively, and the brightness comparison result of each display area in the display module has two types: the luminance of the first display area is less than the luminance of the second display area, and the luminance of the first display area is greater than the luminance of the second display area. The brightness comparison result corresponds to two voltage drop compensation schemes, namely a first voltage drop compensation scheme and a second voltage drop compensation scheme. In the first voltage drop compensation scheme, the voltage drop compensation parameter of the first display area is greater than the voltage drop compensation parameter of the second display area, and the comparison result corresponds to the comparison result that the brightness of the first display area is less than that of the second display area. In the second voltage drop compensation scheme, the voltage drop compensation parameter of the first display area is smaller than the voltage drop compensation parameter of the second display area, and the comparison result corresponds to the fact that the brightness of the first display area is larger than the brightness of the second display area.
If the brightness of the first display area in the target display module is smaller than that of the second display area, the first voltage drop compensation scheme is adopted to perform voltage drop compensation on the target display module, the voltage drop compensation result is shown in fig. 5, the difference between the brightness of the first display area and the brightness of the second display area is reduced, and the brightness uniformity of the target display module is improved. If the brightness of the first display area in the target display module is greater than the brightness of the second display area, the second voltage drop compensation scheme is adopted to perform voltage drop compensation on the target display module, the voltage drop compensation result is shown in fig. 6, the difference between the brightness of the display units in the first display area and the second display area is reduced, and the brightness uniformity of the target display module is improved. Therefore, the brightness uniformity of the display module can be improved for the display modules with various brightness comparison results.
Specifically, the step S406 includes: selecting a voltage drop compensation scheme corresponding to the brightness comparison results of at least two display areas in the target display module based on the corresponding relation between the brightness comparison results and the voltage drop compensation scheme, wherein the voltage drop compensation scheme comprises voltage drop compensation parameters of each display unit; acquiring a target brightness value of a target display module; determining a voltage drop compensation value of a reference display unit based on a target brightness value of the target display module and a brightness value of the reference display unit in the target display module, wherein the reference display unit is any one display unit in the target display module; determining a voltage drop compensation value of each display unit in the target display module based on the voltage drop compensation value of the reference display unit and the voltage drop compensation parameter of each display unit in the selected voltage drop compensation scheme; and performing voltage drop compensation on each display unit in the display module by adopting the voltage drop compensation value of each display unit in the target display module.
The voltage drop compensation parameter is a numerical value for comparing the voltage drop compensation degree of each display unit in the same display module. The target brightness value is the brightness value that each display unit in the target display module needs to reach. The voltage drop compensation value is a value for measuring the voltage drop compensation degree of one display unit reaching a target brightness value.
And the computer equipment selects a voltage drop compensation scheme corresponding to the brightness comparison results of at least two display areas in the target display module based on the corresponding relation between the brightness comparison result and the voltage drop compensation scheme, wherein the voltage drop compensation scheme comprises voltage drop compensation parameters of each display unit, and the degree relation of voltage drop compensation of each display unit in the target display module can be obtained. At the moment, a target brightness value of the target display module is obtained, so that a voltage drop compensation value of the reference display unit is determined based on the target brightness value of the target display module and the brightness value of the reference display unit in the target display module, a voltage drop compensation value of each display unit in the target display module is determined based on the voltage drop compensation value of the reference display unit and the voltage drop compensation parameter of each display unit in the selected voltage drop compensation scheme, and finally, voltage drop compensation is performed on each display unit in the display module by adopting the voltage drop compensation value of each display unit in the target display module, so that the brightness value of each display unit in the target display module reaches the target brightness value.
Illustratively, the reference display unit is a display unit located at the center of the target display module.
The brightness value of the display unit positioned in the center of the target display module is usually closest to the brightness value of the target display module, and the display unit is used as a reference display unit to determine a voltage drop compensation value, so that the brightness value of each display unit in the target display module can reach the target brightness value.
Exemplarily, the determining the voltage drop compensation value of the reference display unit based on the target brightness value of the target display module and the brightness value of the reference display unit in the target display module comprises: and taking the difference value between the target brightness value of the target display module and the brightness value of the reference display unit in the target display module as a voltage drop compensation value of the reference display unit.
Exemplarily, determining the voltage drop compensation value of each display unit in the target display module based on the voltage drop compensation value of the reference display unit and the voltage drop compensation parameter of each display unit in the selected voltage drop compensation scheme includes: and multiplying the ratio of the voltage drop compensation parameter of the reference display unit to the voltage drop compensation parameter of the target display unit in the voltage drop compensation scheme by the voltage drop compensation value of the reference display unit to obtain the voltage drop compensation value of the target display unit in the target display module.
Exemplarily, the voltage drop compensation is performed on each display unit in the display module by adopting the voltage drop compensation value of each display unit in the target display module, and the method comprises the following steps: and increasing or decreasing the driving voltage value of each display unit in the target display module based on the voltage drop compensation value of each display unit in the target display module.
The brightness of the display unit is controlled by the driving voltage, and the driving voltage value of the corresponding display unit is increased or decreased directly based on the voltage drop compensation value of each display unit in the target display module, so that the brightness value of the corresponding display unit can be changed, and the voltage drop compensation is realized.
In practical application, aiming at different brightness comparison results, enough display modules are taken in advance to determine and summarize the voltage drop compensation parameters of each display unit, so as to obtain a voltage drop compensation scheme corresponding to the brightness comparison results. And then, acquiring the brightness value of each display unit in any one display module (namely, the target display module), and determining the brightness comparison result of at least two display areas in the target display module, namely, performing voltage drop compensation on the target display module by adopting the voltage drop compensation scheme corresponding to the target display module based on the corresponding relation between the brightness comparison result and the voltage drop compensation scheme.
The distribution mode of the display units in each display module group of the obtained voltage drop compensation scheme is the same as that of the target display module group, so that the driving voltage values of the corresponding display units in the target display module group are increased or decreased based on the voltage drop compensation parameters of the display units in the voltage drop compensation scheme.
In the voltage drop compensation method, the brightness value of each display unit in the target display module is obtained first, and then the brightness comparison result of at least two display areas in the target display module is determined based on the brightness value of each display unit in the target display module, wherein each display area comprises at least one display unit, so that the voltage drop compensation can be performed on each display unit in the target display module by adopting the voltage drop compensation method corresponding to the brightness comparison result of at least two display areas in the target display module based on the corresponding relation between the brightness comparison result and the voltage drop compensation scheme. As the matched voltage drop compensation scheme is adopted to perform voltage drop compensation on the target display module according to the brightness comparison result between different display areas in the target display module, better voltage drop compensation effect can be achieved, and the brightness uniformity of the target display module is effectively improved. And all target display module assemblies that the luminance comparative result of display area is the same all adopt same pressure drop compensation scheme to compensate, can reduce the formulation time of compensation scheme by a wide margin, simplify the compensation process of target display module assembly, improve the compensation efficiency of target display module assembly, reduce the compensation cost of target display module assembly, can be applicable to the volume production product well.
The display module comprises a driving chip and a plurality of display units, wherein the display units are positioned on the same side of the driving chip and are connected with the driving chip through metal wiring. The brightness of each display unit is positively correlated with the voltage provided by the driving chip, and the IR Drop is positively correlated with the distance between the display unit and the driving chip, so that the brightness of each display unit is correlated with the distance between the display unit and the driving chip. Generally, the luminance of the display unit farther from the driving chip is smaller than the luminance of the display unit closer to the driving chip. Meanwhile, due to the influence of the production process, the brightness of the display unit which is far away from the driving chip in the display module is larger than that of the display unit which is near to the driving chip. Therefore, the brightness difference of each display unit in the display module is basically concentrated on the display unit far away from the driving chip and the display unit near to the driving chip.
To this end, in one embodiment, as shown in fig. 7, a voltage drop compensation method is provided, in which a plurality of display units are divided into two display areas, a first display area and a second display area, and a distance between a display unit and a driving chip in the first display area is greater than a distance between a display unit and a driving chip in the second display area. Specifically, the method comprises the following steps:
step S702, obtaining the brightness value of each display unit in the target display module.
Specifically, the step S702 is the same as the step S402, and is not described in detail here.
Step S704, determining brightness values of the first display area and the second display area in the target display module based on the brightness values of the display units in the target display module.
The first display area and the second display area are different display areas, and the distance between the display unit and the driving chip in the first display area is larger than the distance between the display unit and the driving chip in the second display area. For example, the first display area includes all display units whose distances from the driving chip are greater than the distances from the display module to the driving chip, and the second display area includes all display units whose distances from the driving chip are less than the distances from the display module to the driving chip.
The different luminance of each display unit in the display module mainly reflects in the luminance size difference in first display area and second display area. The display module is divided into a first display area and a second display area, and the brightness distribution condition of the display module can be conveniently and accurately determined according to the brightness comparison result of the first display area and the second display area.
The luminance values of the first display region and the second display region may be determined in one of three implementations:
in one implementation, the luminance value of the first display region is a maximum of the luminance values of the display units in the first display region, and the luminance value of the second display region is a maximum of the luminance values of the display units in the second display region.
In another implementation manner, the brightness value of the first display area is a median of the brightness values of the display units in the first display area, and the brightness value of the second display area is a median of the brightness values of the display units in the second display area.
In yet another implementation, the luminance value of the first display region is an average of luminance values of the display units in the first display region, and the luminance value of the second display region is an average of luminance values of the display units in the second display region.
The above three implementation manners respectively adopt the maximum value, the median value and the average value of the brightness values of all the display units in the same display area as the brightness value of the display area, which are all beneficial to accurately determining the brightness comparison result of each display area.
Step S706, determining a brightness comparison result between the first display area and the second display area in the target display module based on the brightness values of the first display area and the second display area in the target display module.
The brightness comparison result of the first display area and the second display area in the target display module may include the following two types: the luminance value of the first display region is smaller than the luminance value of the second display region, and the luminance value of the first display region is larger than the luminance value of the second display region.
In this embodiment, step S404 is implemented by step S704 and step S706.
Step S708, when the brightness comparison result of the first display area and the second display area in the target display module is that the brightness value of the first display area is smaller than the brightness value of the second display area, performing voltage drop compensation on each display unit in the target display module by using a first voltage drop compensation scheme, where a voltage drop compensation parameter of the first display area in the first voltage drop compensation scheme is greater than a voltage drop compensation parameter of the second display area.
The brightness value of the first display area in the target display module is smaller than that of the second display area, and the voltage drop compensation parameter of the first display area in the first voltage drop compensation scheme for voltage drop compensation of the target display module is larger than that of the second display area, so that the brightness difference between the first display area and the second display area in the target display module can be reduced, and the uniformity of the target display module is improved.
Specifically, the first voltage drop compensation scheme is determined by voltage drop compensation parameters of each display unit in the plurality of first sample display modules, and the brightness value of the first display area in each first sample display module is smaller than the brightness value of the second display area. Wherein, the first sample display module is used as a sample to obtain a first voltage drop compensation scheme.
Optionally, the voltage drop compensation parameter of each display unit in the first voltage drop compensation scheme may be determined in one of the following two implementation manners:
in one implementation, the voltage drop compensation parameter of each display unit in the first voltage drop compensation scheme is a median of the voltage drop compensation parameters of the corresponding display units in the plurality of first sample display modules.
In another implementation manner, the voltage drop compensation parameter of each display unit in the first voltage drop compensation scheme is an average value of the voltage drop compensation parameters of the corresponding display units in the plurality of first sample display modules.
Step S710, when the brightness comparison result between the first display area and the second display area in the target display module is that the brightness value of the first display area is greater than the brightness value of the second display area, performing voltage drop compensation on each display unit in the target display module by using a second voltage drop compensation scheme, where a voltage drop compensation parameter of the first display area in the second voltage drop compensation scheme is smaller than a voltage drop compensation parameter of the second display area.
The brightness value of the first display area in the target display module is larger than that of the second display area, and the voltage drop compensation parameter of the first display area in the second voltage drop compensation scheme for voltage drop compensation of the target display module is smaller than that of the second display area, so that the brightness difference between the first display area and the second display area in the target display module can be reduced, and the uniformity of the target display module is improved.
Specifically, the second voltage drop compensation scheme is determined by voltage drop compensation parameters of each display unit in the plurality of second sample display modules, and the brightness value of the first display area in each second sample display module is greater than the brightness value of the second display area. And the second sample display module is also used as a display module for obtaining the first pressure drop compensation scheme. The difference between the second sample display module and the first sample display module is mainly that the brightness value of the first display area in the first sample display module is smaller than that of the second display area, and the brightness value of the first display area in the second sample display module is larger than that of the second display area.
Optionally, the voltage drop compensation parameter of each display unit in the second voltage drop compensation scheme may be determined in one of the following two implementation manners:
in one implementation, when the voltage drop compensation parameter of each display unit in the first voltage drop compensation scheme is the median of the voltage drop compensation parameter of the corresponding display unit in the plurality of first sample display modules, the voltage drop compensation parameter of each display unit in the second voltage drop compensation scheme is the median of the voltage drop compensation parameter of the corresponding display unit in the plurality of second sample display modules.
In another implementation manner, when the voltage drop compensation parameter of each display unit in the first voltage drop compensation scheme is an average value of the voltage drop compensation parameters of the corresponding display units in the plurality of first sample display modules, the voltage drop compensation parameter of each display unit in the second voltage drop compensation scheme is an average value of the voltage drop compensation parameters of the corresponding display units in the plurality of second sample display modules.
In this embodiment, step S406 is implemented by step S708 and step S710.
In this embodiment, the brightness comparison result of the plurality of display units in the target display module can be simplified into the brightness comparison result of the two display areas by dividing the plurality of display units into the two display areas, i.e., the first display area and the second display area. And the IR Drop size is positively correlated with the distance between the display unit and the driving chip, and the distance between the display unit and the driving chip in the first display area is greater than the distance between the display unit and the driving chip in the second display area, so that the brightness comparison result of the first display area and the second display area can accurately represent the brightness comparison result of a plurality of display units in the target display module.
If the brightness value of the first display area in the target display module is smaller than the brightness value of the second display area, the voltage drop compensation scheme that the voltage drop compensation parameter of the first display area is larger than the voltage drop compensation parameter of the second display area is adopted to perform voltage drop compensation on the target display module, so that the brightness difference between the first display area and the second display area in the target display module can be reduced, and the uniformity of the target display module is improved. If the brightness value of the first display area in the target display module is larger than the brightness value of the second display area, the voltage drop compensation scheme that the voltage drop compensation parameter of the first display area is smaller than the voltage drop compensation parameter of the second display area is adopted to perform voltage drop compensation on the target display module, so that the brightness difference between the first display area and the second display area in the target display module can be reduced, and the uniformity of the target display module is improved. In conclusion, the brightness uniformity of the target display module with different brightness comparison results can be improved, the voltage drop compensation scheme is directly adopted for voltage drop compensation, the efficiency is high, the cost is low, and the method is suitable for mass production products.
The brightness uniformity of the display module has a certain standard and is larger than a set threshold value. If the brightness uniformity of one display module is greater than the set threshold before the voltage drop compensation is carried out, the voltage drop compensation is not required to be carried out on the display module, so that the cost is further reduced and the efficiency is improved.
Therefore, in an embodiment, as shown in fig. 8, the step of performing voltage drop compensation on each display unit in the target display module by using the voltage drop compensation scheme corresponding to the brightness comparison result of at least two display regions in the target display module based on the correspondence between the brightness comparison result and the voltage drop compensation scheme specifically includes:
step S802, determining the brightness uniformity of the target display module based on the brightness values of the display units in the target display module.
The brightness uniformity of the target display module is a similarity evaluation index of the brightness values of the display units in the target display module.
Specifically, the step S802 includes: and determining the ratio of the minimum value to the maximum value of the brightness values of all the display units in the target display module based on the brightness values of all the display units in the target display module, and taking the ratio as the brightness uniformity of the target display module.
For example, the set threshold may be set according to the product requirements of the target display module, such as 95%.
Step S804, if the brightness uniformity of the target display module is less than or equal to the set threshold, performing voltage drop compensation on each display unit in the target display module by using the voltage drop compensation scheme corresponding to the brightness comparison result of at least two display areas in the target display module based on the correspondence between the brightness comparison result and the voltage drop compensation scheme.
In this embodiment, the brightness uniformity of the target display module is determined based on the brightness values of the display units in the target display module, and if the brightness uniformity of the target display module is greater than the set threshold, the voltage drop compensation is not performed on the target display module, so that the time and the cost can be saved.
Correspondingly, determining the brightness comparison result of at least two display areas in the target display module based on the brightness value of each display unit in the target display module may include: and if the brightness uniformity of the target display module is less than or equal to the set threshold, determining the brightness comparison result of at least two display areas in the target display module based on the brightness value of each display unit in the target display module.
In a specific embodiment, as shown in fig. 9, the method includes:
step S902, obtaining brightness values of each display unit in the target display module, and determining a brightness comparison result between a first display area and a second display area in the target display module based on the brightness values of each display unit in the target display module, where a distance between a display unit and a driver chip in the first display area is greater than a distance between a display unit and a driver chip in the second display area.
Step S904, determining the brightness uniformity of the target display module based on the brightness values of the display units in the target display module, and determining whether the brightness uniformity of the target display module is greater than a set threshold. If yes, if the brightness uniformity of the target display module is greater than the set threshold, then execute step S906; if not, that is, the brightness uniformity of the target display module is less than or equal to the set threshold, step S908 is executed.
Step S906, no voltage drop compensation is performed on each display unit in the target display module.
Step S908 is performed to determine whether the brightness comparison result between the first display area and the second display area in the target display module is that the brightness value of the second display unit is greater than the brightness value of the first display unit. If yes, that is, the brightness comparison result between the first display area and the second display area in the target display module is that the brightness value of the second display unit is greater than the brightness value of the first display unit, then step S910 is executed; if not, that is, the comparison result of the brightness of the first display area and the second display area in the target display module is that the brightness value of the second display unit is less than or equal to the brightness value of the first display unit, step S912 is executed.
Step S910, performing voltage drop compensation on each display unit in the target display module by using a first voltage drop compensation scheme, where a voltage drop compensation parameter of a first display area in the first voltage drop compensation scheme is greater than a voltage drop compensation parameter of a second display area.
Step S912, performing voltage drop compensation on each display unit in the target display module by using a second voltage drop compensation scheme, where a voltage drop compensation parameter of the first display area in the second voltage drop compensation scheme is smaller than a voltage drop compensation parameter of the second display area.
In this embodiment, through obtaining the luminance value of each display element in the target display module, and based on the luminance value of each display element in the target display module, determine the luminance comparison result of the first display area and the second display area in the target display module and the luminance uniformity of the target display module, it is convenient to carry out corresponding processing to different situations of the target display module. Whether the brightness uniformity of the target display module is larger than a set threshold value or not is judged, and when the brightness uniformity of the target display module is larger than the set threshold value, the voltage drop compensation is not carried out on each display unit in the target display module, so that the voltage drop compensation of the target display module with high brightness uniformity can be omitted, and the time and the cost are saved. When the brightness value of the second display unit in the target display module is larger than that of the first display unit, the first voltage drop compensation scheme is adopted to perform voltage drop compensation on each display unit in the target display module, when the brightness value of the second display unit in the target display module is smaller than or equal to that of the first display unit, the second voltage drop compensation scheme is adopted to perform voltage drop compensation on each display unit in the target display module, the corresponding voltage drop compensation schemes can be respectively adopted for the target display modules with different brightness distribution conditions to perform voltage drop compensation, and the brightness uniformity of all the target display modules is improved.
The first voltage drop compensation scheme and the second voltage drop compensation scheme are obtained in advance and correspond to the brightness comparison result, and the method specifically comprises the following steps: obtaining the pressure drop compensation parameters of each display unit in a plurality of sample display modules, wherein the brightness comparison results of at least two display areas in each sample display module are the same; and obtaining the pressure drop compensation parameters of the corresponding display units in the pressure drop compensation scheme based on the pressure drop compensation parameters of the display units in the plurality of sample display modules.
Wherein, the sample display module is used as a sample to obtain a pressure drop compensation scheme. The brightness comparison results of at least the display areas in the sample display module group of the same voltage drop compensation scheme are the same, and the brightness comparison results of at least the display areas in the sample display module groups of different voltage drop compensation schemes are different. For example, for the first voltage drop compensation scheme, the luminance values of the first display regions in the plurality of sample display modules are all less than the luminance value of the second display region; for the second voltage drop compensation scheme, the brightness values of the first display areas in the plurality of sample display modules are all greater than the brightness value of the second display area.
Specifically, obtain the pressure drop compensation parameter of each display element in a plurality of sample display module assemblies, include: obtaining the brightness values of all display units in all the sample display modules by taking a plurality of sample display modules, and determining the brightness comparison result of at least two display areas in all the sample display modules based on the brightness values of all the display units in all the sample display modules; and selecting a plurality of sample display modules with the same brightness comparison result, and obtaining the pressure drop compensation parameters of each display unit in each sample display module.
In practical application, the brightness value of each display unit in the sample display module can be obtained every time when one sample display module is taken, and the brightness comparison result of at least two display areas in the sample display module is determined based on the brightness value of each display unit in the sample display module. And if the number of the sample display modules of each brightness comparison result is more than or equal to the set number, stopping sampling the sample display modules. And then randomly selecting a set number of sample display modules from the sample display modules of each brightness comparison result, obtaining the pressure drop compensation parameters of each display unit in each sample display module, and further obtaining the pressure drop compensation schemes corresponding to the brightness comparison results.
Illustratively, the set number is 30 to 50.
30-50 sample display modules with the same brightness comparison result can reflect the overall situation of the brightness comparison result and can take account of the workload and the cost of processing.
Optionally, obtaining a pressure drop compensation parameter of each display unit in each sample display module comprises: adopting various pressure drop compensation parameter combinations to perform pressure drop compensation on the same sample display module, and determining the brightness uniformity of the sample display module after the pressure drop compensation; and obtaining the voltage drop compensation parameters of each display unit in the sample display module based on the voltage drop compensation parameter combination with the highest brightness uniformity.
The voltage drop compensation parameters of the display units in the same voltage drop compensation parameter combination are linearly increased or decreased along the increasing or decreasing direction of the brightness value, for example, the voltage drop compensation parameters of the display units are linearly decreased along the increasing direction of the brightness value, or the voltage drop compensation parameters of the display units are linearly increased along the decreasing direction of the brightness value. The linear increase and decrease amplitudes of the voltage drop compensation parameters of each display unit in different voltage drop compensation parameter combinations are different, for example, the difference of the voltage drop compensation parameters of two adjacent display units in one voltage drop compensation parameter combination is twice as large as the difference of the voltage drop compensation parameters of two adjacent display units in the other voltage drop compensation parameter combination.
Optionally, selecting a plurality of sample display modules with the same brightness comparison result, including: acquiring brightness values based on all display units in all sample display modules, and determining the brightness uniformity of all sample display modules; and if the brightness of one sample display module is within the set range, selecting the sample display module. Correspondingly, if the brightness of one sample display module is out of the set range, the sample display module is excluded.
Utilize luminance homogeneity to screen sample display module assembly, be favorable to the accurate pressure drop condition of confirming sample display module assembly, and then improve the compensation effect of pressure drop compensation scheme.
Illustratively, the setting range employs one of three ranges: the threshold value is less than or equal to a set threshold value, greater than or equal to a good product threshold value and less than or equal to a set threshold value.
The display module assembly that luminance homogeneity is greater than the settlement threshold value need not carry out the pressure drop compensation, and the display module assembly that luminance homogeneity is less than the yields threshold value can't reach the product requirement through the pressure drop compensation, and such display module assembly is got rid of in the screening, is favorable to the accurate pressure drop condition of confirming sample display module assembly, and then improves the compensation effect of pressure drop compensation scheme.
In one implementation, based on the voltage drop compensation parameters of each display unit in the plurality of sample display modules, a voltage drop compensation scheme corresponding to the brightness comparison result of at least two display areas in the target display module is obtained, which includes: and the median of the voltage drop compensation parameters of the same display unit in the plurality of sample display modules is used as the voltage drop compensation parameters of the same display unit in the voltage drop compensation scheme.
In another implementation manner, based on the voltage drop compensation parameters of each display unit in the plurality of sample display modules, a voltage drop compensation scheme corresponding to the brightness comparison result of at least two display areas in the target display module is obtained, which includes: and adopting the average value of the pressure drop compensation parameters of the same display unit in the plurality of sample display modules as the pressure drop compensation parameters of the same display unit in the pressure drop compensation scheme.
In practical application, after the voltage drop compensation scheme is obtained, the display module different from the sample display module can be taken to perform voltage drop compensation by adopting the voltage drop compensation scheme, and the brightness uniformity of each display module after voltage drop compensation is determined. If the brightness uniformity after the voltage drop compensation of all the display modules is larger than the set threshold value, the voltage drop compensation scheme passes the verification; if the brightness uniformity after the voltage drop compensation of at least one display module is less than or equal to the set threshold, the voltage drop compensation scheme is not passed seriously, and a new voltage drop compensation scheme needs to be obtained.
In this embodiment, through the pressure drop compensation parameter who obtains each display element in a plurality of sample display module assemblies, the luminance comparative result of two at least display areas in every sample display module assembly is the same with the luminance comparative result of two at least display areas in the target display module assembly, and based on the pressure drop compensation parameter of each display element in a plurality of sample display module assemblies, obtain the pressure drop compensation scheme that the luminance comparative result of two at least display areas in the target display module assembly corresponds, can all adopt this pressure drop compensation scheme to carry out the pressure drop compensation to the same target display module assembly of luminance comparative result, and high in effect, low cost, and is suitable for volume production product.
It should be understood that although the various steps in the flowcharts of fig. 4, 7-9 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 4, 7-9 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps or stages.
In one embodiment, as shown in fig. 10, there is provided a voltage drop compensation device 1000, including: an obtaining module 1001, a determining module 1002, and a compensating module 1003, wherein:
the obtaining module 1001 is configured to obtain a brightness value of each display unit in the target display module.
The determining module 1002 is configured to determine a brightness comparison result of at least two display areas in the target display module based on the brightness value of each display unit in the target display module, where each display area includes at least one display unit.
And the compensation module 1003 is configured to perform voltage drop compensation on each display unit in the target display module by using the voltage drop compensation scheme corresponding to the brightness comparison results of the at least two display areas in the target display module based on the correspondence between the brightness comparison results and the voltage drop compensation scheme.
According to the voltage drop compensation device, the brightness value of each display unit in the target display module is obtained firstly, then the brightness comparison result of at least two display areas in the target display module is determined based on the brightness value of each display unit in the target display module, each display area comprises at least one display unit, and therefore voltage drop compensation can be carried out on each display unit in the target display module by adopting the voltage drop compensation method corresponding to the brightness comparison result of at least two display areas in the target display module based on the corresponding relation between the brightness comparison result and the voltage drop compensation scheme. As the matched voltage drop compensation scheme is adopted to perform voltage drop compensation on the target display module according to the brightness comparison result between different display areas in the target display module, better voltage drop compensation effect can be achieved, and the brightness uniformity of the target display module is effectively improved. And all target display module assemblies that the luminance comparative result of display area is the same all adopt same pressure drop compensation scheme to compensate, can reduce the formulation time of compensation scheme by a wide margin, simplify the compensation process of target display module assembly, improve the compensation efficiency of target display module assembly, reduce the compensation cost of target display module assembly, can be applicable to the volume production product well.
In one embodiment, the display area includes a first display area and a second display area, and the compensation module 1003 is configured to, when the brightness comparison result between the first display area and the second display area in the target display module is that the brightness value of the first display area is smaller than the brightness value of the second display area, perform voltage drop compensation on each display unit in the target display module by using a first voltage drop compensation scheme, where a voltage drop compensation parameter of the first display area in the first voltage drop compensation scheme is greater than a voltage drop compensation parameter of the second display area; and when the brightness comparison result of the first display area and the second display area in the target display module is that the brightness value of the first display area is greater than that of the second display area, performing voltage drop compensation on each display unit in the target display module by adopting a second voltage drop compensation scheme, wherein the voltage drop compensation parameter of the first display area in the second voltage drop compensation scheme is smaller than that of the second display area.
In one embodiment, the first voltage drop compensation scheme is determined by voltage drop compensation parameters of each display unit in a plurality of first sample display modules, and the brightness value of a first display area in each first sample display module is smaller than that of a second display area; the second voltage drop compensation scheme is determined by voltage drop compensation parameters of all the display units in the plurality of second sample display modules, and the brightness value of the first display area in each second sample display module is larger than that of the second display area.
In one embodiment, the voltage drop compensation parameter of each display unit in the first voltage drop compensation scheme is a median of the voltage drop compensation parameters of the corresponding display units in the plurality of first sample display modules, and the voltage drop compensation parameter of each display unit in the second voltage drop compensation scheme is a median of the voltage drop compensation parameters of the corresponding display units in the plurality of second sample display modules; or the voltage drop compensation parameter of each display unit in the first voltage drop compensation scheme is an average value of the voltage drop compensation parameters of the corresponding display units in the plurality of first sample display modules, and the voltage drop compensation parameter of each display unit in the second voltage drop compensation scheme is an average value of the voltage drop compensation parameters of the corresponding display units in the plurality of second sample display modules.
In one embodiment, the determining module 1002 comprises a brightness determining unit and a brightness comparing unit, wherein: and the brightness determining unit is used for determining the brightness values of the first display area and the second display area in the target display module based on the brightness values of all the display units in the target display module. And the brightness comparison unit is used for determining the brightness comparison result of the first display area and the second display area in the target display module based on the brightness values of the first display area and the second display area in the target display module.
In one embodiment, the luminance values of the first display region and the second display region are the maximum values of the luminance values of the display units in the first display region and the second display region; or the brightness values of the first display area and the second display area are median values of the brightness values of the display units in the first display area and the second display area; alternatively, the luminance values of the first display region and the second display region are an average value of the luminance values of the display units in the first display region and the second display region.
In one embodiment, the compensation module 1003 includes a uniformity determination unit and a compensation unit, wherein: and the uniformity determining unit is used for determining the brightness uniformity of the target display module based on the brightness value of each display unit in the target display module. And the compensation unit is used for performing voltage drop compensation on each display unit in the target display module by adopting the voltage drop compensation scheme corresponding to the brightness comparison results of at least two display areas in the target display module based on the corresponding relation between the brightness comparison result and the voltage drop compensation scheme when the brightness uniformity of the target display module is smaller than or equal to the set threshold value.
For the specific definition of the pressure drop compensation device, reference may be made to the above definition of the pressure drop compensation method, which is not described herein again. The modules in the pressure drop compensation device can be implemented in whole or in part by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, the internal structure of which may be as shown in fig. 11. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used to store the pressure drop compensation scheme. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of compensating for a pressure drop.
Those skilled in the art will appreciate that the architecture shown in fig. 11 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of the above-described method embodiments when executing the computer program.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A method of compensating for a pressure drop, the method comprising:
acquiring the brightness value of each display unit in the target display module;
determining brightness comparison results of at least two display areas in the target display module based on the brightness values of all display units in the target display module, wherein each display area comprises at least one display unit;
and performing voltage drop compensation on each display unit in the target display module by adopting the voltage drop compensation scheme corresponding to the brightness comparison results of at least two display areas in the target display module based on the corresponding relation between the brightness comparison result and the voltage drop compensation scheme.
2. The method according to claim 1, wherein the display regions include a first display region and a second display region, and the performing voltage drop compensation on each display unit in the target display module by using the voltage drop compensation schemes corresponding to the brightness comparison results of at least two display regions in the target display module based on the correspondence between the brightness comparison results and the voltage drop compensation schemes comprises:
when the brightness comparison result of a first display area and a second display area in the target display module is that the brightness value of the first display area is smaller than that of the second display area, performing voltage drop compensation on each display unit in the target display module by adopting a first voltage drop compensation scheme, wherein a voltage drop compensation parameter of the first display area in the first voltage drop compensation scheme is larger than that of the second display area;
and when the brightness comparison result of the first display area and the second display area in the target display module is that the brightness value of the first display area is greater than that of the second display area, performing voltage drop compensation on each display unit in the target display module by adopting a second voltage drop compensation scheme, wherein the voltage drop compensation parameter of the first display area in the second voltage drop compensation scheme is smaller than that of the second display area.
3. The method of claim 2, wherein a distance between the display unit and the driving chip in the first display region is greater than a distance between the display unit and the driving chip in the second display region.
4. The method according to claim 2 or 3, wherein the first voltage drop compensation scheme is determined by voltage drop compensation parameters of each display unit in a plurality of first sample display modules, and the brightness value of a first display area in the first sample display module is smaller than that of a second display area; the second voltage drop compensation scheme is determined by voltage drop compensation parameters of all display units in a plurality of second sample display modules, and the brightness value of a first display area in each second sample display module is larger than that of a second display area.
5. The method according to claim 4, wherein the voltage drop compensation parameter of each display unit in the first voltage drop compensation scheme is a median value of the voltage drop compensation parameters of the corresponding display units in the first plurality of sample display modules, and the voltage drop compensation parameter of each display unit in the second voltage drop compensation scheme is a median value of the voltage drop compensation parameters of the corresponding display units in the second plurality of sample display modules;
or the voltage drop compensation parameter of each display unit in the first voltage drop compensation scheme is an average value of the voltage drop compensation parameters of the corresponding display units in the plurality of first sample display modules, and the voltage drop compensation parameter of each display unit in the second voltage drop compensation scheme is an average value of the voltage drop compensation parameters of the corresponding display units in the plurality of second sample display modules.
6. The method according to claim 2 or 3, wherein the determining the brightness comparison result of at least two display areas in the target display module based on the brightness values of the display units in the target display module comprises:
determining brightness values of a first display area and a second display area in the target display module based on the brightness values of all display units in the target display module;
and determining the brightness comparison result of the first display area and the second display area in the target display module based on the brightness values of the first display area and the second display area in the target display module.
7. The method according to claim 6, wherein the luminance values of the first display region and the second display region are the maximum values of the luminance values of the display units in the first display region and the second display region;
or the brightness values of the first display area and the second display area are the median of the brightness values of the display units in the first display area and the second display area;
or the brightness values of the first display area and the second display area are the average value of the brightness values of the display units in the first display area and the second display area.
8. The method according to any one of claims 1 to 7, wherein performing voltage drop compensation on each display unit in the target display module by using the voltage drop compensation scheme corresponding to the brightness comparison results of at least two display regions in the target display module based on the correspondence between the brightness comparison results and the voltage drop compensation scheme comprises:
determining the brightness uniformity of the target display module based on the brightness value of each display unit in the target display module;
and if the brightness uniformity of the target display module is smaller than or equal to a set threshold value, performing voltage drop compensation on each display unit in the target display module by adopting a voltage drop compensation scheme corresponding to the brightness comparison results of at least two display areas in the target display module based on the corresponding relation between the brightness comparison result and the voltage drop compensation scheme.
9. The method according to any one of claims 1 to 8, wherein performing voltage drop compensation on each display unit in the target display module by using the voltage drop compensation scheme corresponding to the brightness comparison results of at least two display regions in the target display module based on the correspondence between the brightness comparison results and the voltage drop compensation scheme comprises:
selecting a voltage drop compensation scheme corresponding to the brightness comparison results of at least two display areas in the target display module based on the corresponding relationship between the brightness comparison results and the voltage drop compensation scheme, wherein the voltage drop compensation scheme comprises voltage drop compensation parameters of each display unit;
acquiring a target brightness value of the target display module;
determining a voltage drop compensation value of a reference display unit based on the target brightness value and a brightness value of the reference display unit in the target display module, wherein the reference display unit is any one display unit in the target display module;
determining a voltage drop compensation value of each display unit in the target display module based on the voltage drop compensation value of the reference display unit and the voltage drop compensation parameter of each display unit in the voltage drop compensation scheme;
and performing voltage drop compensation on each display unit in the display module by using the voltage drop compensation value of each display unit in the target display module.
10. A pressure drop compensation device, the device comprising:
the acquisition module is used for acquiring the brightness value of each display unit in the target display module;
the determining module is used for determining the brightness comparison result of at least two display areas in the target display module based on the brightness value of each display unit in the target display module, wherein each display area comprises at least one display unit;
and the compensation module is used for performing voltage drop compensation on each display unit in the target display module by adopting the voltage drop compensation scheme corresponding to the brightness comparison results of at least two display areas in the target display module based on the corresponding relation between the brightness comparison result and the voltage drop compensation scheme.
CN202110719163.5A 2021-06-28 2021-06-28 Pressure drop compensation method and device Active CN113470575B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110719163.5A CN113470575B (en) 2021-06-28 2021-06-28 Pressure drop compensation method and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110719163.5A CN113470575B (en) 2021-06-28 2021-06-28 Pressure drop compensation method and device

Publications (2)

Publication Number Publication Date
CN113470575A true CN113470575A (en) 2021-10-01
CN113470575B CN113470575B (en) 2022-09-13

Family

ID=77873273

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110719163.5A Active CN113470575B (en) 2021-06-28 2021-06-28 Pressure drop compensation method and device

Country Status (1)

Country Link
CN (1) CN113470575B (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104036722A (en) * 2014-05-16 2014-09-10 京东方科技集团股份有限公司 Pixel unit driving circuit, driving method thereof and display device
KR20160047618A (en) * 2014-10-22 2016-05-03 삼성디스플레이 주식회사 Data compensating apparatus and organic light emitting display device having the same
US20170193905A1 (en) * 2016-01-04 2017-07-06 Boe Technology Group Co., Ltd. Voltage drop compensation method, voltage drop compensation device, and display device
CN109817160A (en) * 2019-04-01 2019-05-28 芯颖科技有限公司 display screen brightness control method and device
US20200211457A1 (en) * 2018-12-31 2020-07-02 Lg Display Co., Ltd. Luminance compensation device and electroluminescence display using the same
CN111798797A (en) * 2020-07-28 2020-10-20 合肥鑫晟光电科技有限公司 Display control method and device, display device and medium
CN111816113A (en) * 2020-07-29 2020-10-23 昆山工研院新型平板显示技术中心有限公司 Brightness compensation method, device and equipment of display panel
CN112562594A (en) * 2020-12-25 2021-03-26 合肥维信诺科技有限公司 Voltage drop compensation method and device of AMOLED display module
CN112951162A (en) * 2021-02-24 2021-06-11 北京小米移动软件有限公司 Display screen and control method and device thereof

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104036722A (en) * 2014-05-16 2014-09-10 京东方科技集团股份有限公司 Pixel unit driving circuit, driving method thereof and display device
KR20160047618A (en) * 2014-10-22 2016-05-03 삼성디스플레이 주식회사 Data compensating apparatus and organic light emitting display device having the same
US20170193905A1 (en) * 2016-01-04 2017-07-06 Boe Technology Group Co., Ltd. Voltage drop compensation method, voltage drop compensation device, and display device
US20200211457A1 (en) * 2018-12-31 2020-07-02 Lg Display Co., Ltd. Luminance compensation device and electroluminescence display using the same
CN109817160A (en) * 2019-04-01 2019-05-28 芯颖科技有限公司 display screen brightness control method and device
CN111798797A (en) * 2020-07-28 2020-10-20 合肥鑫晟光电科技有限公司 Display control method and device, display device and medium
CN111816113A (en) * 2020-07-29 2020-10-23 昆山工研院新型平板显示技术中心有限公司 Brightness compensation method, device and equipment of display panel
CN112562594A (en) * 2020-12-25 2021-03-26 合肥维信诺科技有限公司 Voltage drop compensation method and device of AMOLED display module
CN112951162A (en) * 2021-02-24 2021-06-11 北京小米移动软件有限公司 Display screen and control method and device thereof

Also Published As

Publication number Publication date
CN113470575B (en) 2022-09-13

Similar Documents

Publication Publication Date Title
US11482154B2 (en) Method, apparatus and device for acquiring luminance compensation data
CN110024020B (en) Display device, calibration device and calibration method thereof
US10249250B2 (en) Backlight control method, backlight module and display apparatus
CN103916603B (en) Backlighting detecting and equipment
WO2019100675A1 (en) Partition-based backlight control method and device
CN107507571A (en) A kind of method and device that external optical compensation is carried out to AMOLED
US9082354B2 (en) Display device and control method therefor
CN111145138B (en) Detection method, device and equipment for LED lamp panel and storage medium
CN105185302A (en) Correction method for light point position deviation among monochromatic images and application thereof
CN111028779B (en) Display panel compensation method and device and display panel
CN113470575B (en) Pressure drop compensation method and device
CN104766310A (en) Light source detecting system and method
CN114359337B (en) RGBT visual target tracking method and device, electronic equipment and storage medium
CN111063319B (en) Image dynamic enhancement method and device based on backlight adjustment and computer equipment
KR102372014B1 (en) Prediction method and system for predicting a luminance decline of display device
CN114283728A (en) Compensation method and device of display panel and computer readable storage medium
CN112614461B (en) Compensation method and device of display panel
CN110675650A (en) Parking space state monitoring method
CN106683047B (en) Illumination compensation method and system for panoramic image
CN111402817B (en) White point coordinate compensation method and device, computer equipment and storage medium
KR20140095793A (en) Method and system for evaluating panel mura
CN107818748B (en) Display panel detection method and device
KR20170102086A (en) Display panel and method of testing the same
US10438547B2 (en) Display device
CN109192118B (en) Method and apparatus for detecting bonding failure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant