CN114596812B - Display screen indentation compensation method, compensation device and electronic equipment - Google Patents

Display screen indentation compensation method, compensation device and electronic equipment Download PDF

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Publication number
CN114596812B
CN114596812B CN202011413989.0A CN202011413989A CN114596812B CN 114596812 B CN114596812 B CN 114596812B CN 202011413989 A CN202011413989 A CN 202011413989A CN 114596812 B CN114596812 B CN 114596812B
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Prior art keywords
display
display area
brightness
difference
driving
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CN114596812A (en
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李健
唐磊
刘赛
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Beijing Xiaomi Mobile Software Co Ltd
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Beijing Xiaomi Mobile Software Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—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

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  • 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 disclosure relates to a display screen indentation compensation method, a compensation device and electronic equipment, wherein the method comprises the following steps: detecting the display brightness of a display screen under set gray scale; when the display brightness difference between the first display area and the second display area of the display screen is larger than or equal to a first difference value, brightness compensation is carried out on the first display area by using a driving voltage higher than a preset threshold value; the second display area surrounds the first display area, and the preset threshold value is a preset driving voltage value for compensating uneven brightness mura of the display screen; when the display brightness difference after the brightness compensation is detected to be smaller than a second difference value, acquiring brightness compensation data of the first display area; wherein the second difference is less than the first difference; and determining a target Gamma value under the set gray scale according to the brightness compensation data.

Description

Display screen indentation compensation method, compensation device and electronic equipment
Technical Field
The disclosure relates to the technical field of display, and in particular relates to a display screen indentation compensation method, a display screen indentation compensation device and electronic equipment.
Background
The display screen includes a plurality of display units. The display units provide display of various colors through light mixing phenomenon by self-luminescence and light rays emitted by the display units with different colors.
In some cases, the display screen exhibits luminance unevenness (mura) of display, for example, luminance unevenness is: the display screen obviously shows the phenomenon that the display color of a certain place or a plurality of places is darker or lighter than the display color of surrounding areas. The problem of uneven display is particularly prominent when large-area solid-color pictures or the same background are displayed, so that the display effect of the display screen is poor.
Disclosure of Invention
In view of this, the disclosure provides a display screen indentation compensation method, a compensation device and an electronic device.
According to a first aspect of an embodiment of the present disclosure, there is provided a method for compensating for an indentation of a display screen, including:
detecting the display brightness of a display screen under set gray scale;
when the display brightness difference between the first display area and the second display area of the display screen is larger than or equal to a first difference value, brightness compensation is carried out on the first display area by using a driving voltage higher than a preset threshold value; the second display area surrounds the first display area, and the preset threshold value is a preset driving voltage value for compensating uneven brightness mura of the display screen;
When the display brightness difference after the brightness compensation is detected to be smaller than a second difference value, acquiring brightness compensation data of the first display area; wherein the second difference is less than the first difference;
and determining a target Gamma value under the set gray scale according to the brightness compensation data.
In some embodiments, the first display area includes a plurality of display units arranged in parallel along a preset direction, the preset direction pointing to an edge of the first display area along a center of the first display area;
the brightness compensation of the first display area with a driving voltage higher than a preset threshold value includes:
performing brightness compensation on the first display area along the preset direction by using driving voltages with values decreasing in sequence according to the first variation; and the difference value of the driving voltages provided for two adjacent display units along the preset direction is the first variation.
In some embodiments, the first display area includes:
a circular display area; the preset direction is a direction extending from the center point of the circular display area to the edge of the circular display area, and is parallel to the radial direction of the circular display area;
Or alternatively, the first and second heat exchangers may be,
a bar display area.
In some embodiments, the method further comprises:
when the display brightness difference is detected to be larger than or equal to the second difference value and smaller than the first difference value after brightness compensation, carrying out brightness compensation on the first display area by using driving voltages with values decreasing in sequence according to a second variation along the preset direction;
wherein the second variation is smaller than the first variation; and along the preset direction, the difference value of the driving voltages provided for the two adjacent display units is the second variation.
In some embodiments, the method further comprises:
and burning the brightness compensation data into the electronic equipment configured with the display screen.
According to a second aspect of embodiments of the present disclosure, there is provided a display screen indentation compensation apparatus, including:
the detection module is used for detecting the display brightness of the display screen under the set gray level;
the driving module is used for carrying out brightness compensation on the first display area by using a driving voltage higher than a preset threshold value when the display brightness difference between the first display area and the second display area of the display screen is larger than or equal to a first difference value; the second display area surrounds the first display area, and the preset threshold value is a preset driving voltage value for compensating uneven brightness mura of the display screen;
The acquisition module is used for acquiring the brightness compensation data of the first display area when the display brightness difference after brightness compensation is detected to be smaller than the second difference value; wherein the second difference is less than the first difference;
and the determining module is used for determining the target Gamma value under the set gray scale according to the brightness compensation data.
In some embodiments, the first display area includes a plurality of display units arranged in parallel along a preset direction, the preset direction pointing to an edge of the first display area along a center of the first display area;
the driving module is specifically configured to perform brightness compensation in the first display area along the preset direction with a driving voltage that sequentially decreases according to a first variation value; and the difference value of the driving voltages provided for two adjacent display units along the preset direction is the first variation.
In some embodiments, the driving module is further configured to perform brightness compensation on the first display area with a driving voltage that sequentially decreases in value according to a second variation along the preset direction when the display brightness difference after brightness compensation is detected to be greater than or equal to the second difference and less than the first difference;
Wherein the second variation is smaller than the first variation; and along the preset direction, the difference value of the driving voltages provided for the two adjacent display units is the second variation.
In some embodiments, the apparatus further comprises:
and the burning module is used for burning the brightness compensation data into the electronic equipment configured with the display screen.
According to a third aspect of embodiments of the present disclosure, there is provided an electronic device, comprising:
a display screen including a plurality of display units;
the first driving assembly and the second driving assembly are respectively and electrically connected with the display unit; the driving voltage output by the second driving component is larger than the driving voltage output by the first driving component;
the control assembly is respectively and electrically connected with the display unit, the first driving assembly and the second driving assembly and is used for determining target driving voltage of the display unit and controlling the first driving assembly to output driving voltage to the display unit with the target driving voltage smaller than or equal to a preset threshold value; wherein the driving voltage enables the controlled switch of the display unit to work in a saturation region;
the control component is further used for controlling the second driving component to output driving voltage to the display unit with the target driving voltage being larger than the preset threshold value.
In some embodiments, the electronic device further comprises:
a storage component for storing indication information of the display unit with the target driving voltage larger than the preset threshold value;
the control component is electrically connected with the storage component and used for reading and controlling the second driving component to output driving voltage to the display unit indicated by the indication information according to the indication information.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:
the display brightness of the display screen under the set gray level is detected; when the display brightness difference between the first display area and the second display area is larger than or equal to the first difference value, brightness compensation is carried out on the first display area by using a driving voltage higher than a preset threshold value; the preset threshold value is a preset driving voltage value for compensating uneven brightness mura of the display screen; when the display brightness difference after brightness compensation is detected to be smaller than the second difference value, acquiring brightness compensation data of a first display area; wherein the second difference is less than the first difference; according to the brightness compensation data, the target Gamma value under the set gray level is determined, and Gamma of the display screen under different set gray levels can be debugged, so that the display brightness difference between the first display area and the second display area is reduced, at least part of bad display screens with uneven display brightness are adjusted to be good products meeting the quality requirements, and the display effect and the yield of the display screen are improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1a is a schematic diagram of an OLED display module with indentations according to an exemplary embodiment.
FIG. 1b is a schematic diagram of another OLED display module with indentations according to an exemplary embodiment.
Fig. 2 is a flow chart illustrating a display screen indentation compensation method according to an exemplary embodiment.
Fig. 3 is a block diagram illustrating a display screen indentation compensation arrangement according to an exemplary embodiment.
Fig. 4 is a block diagram of an electronic device, according to an example embodiment.
Fig. 5 is a simplified schematic diagram of a display unit according to an exemplary embodiment.
Fig. 6 is a schematic diagram illustrating the operational characteristics of a second controlled switch according to an exemplary embodiment.
Fig. 7 is a schematic diagram of an electronic device, according to an example embodiment.
Fig. 8 is a block diagram illustrating a production system of a display device according to an exemplary embodiment.
Fig. 9 is a schematic workflow diagram of a production system of a display device according to an exemplary embodiment.
Fig. 10 is a block diagram illustrating an apparatus for displaying according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
The flexible screen including Organic Light-Emitting Diode (OLED) can be formed into film on Polyimide (PI) substrate and sealed to form OLED display module. Because the polyimide substrate is very thin (5-10 um), in the process of three-dimensional (3D) lamination, composite adhesive tape lamination or the like, the screen body of the display area in the OLED display module can be provided with indentations due to raw materials or process reasons.
For example, when the OLED display module includes a composite material including graphite flakes, the graphite flakes have small holes, so that the overall composite material has a step difference, so that the OLED display module may exhibit uniform circular-hole-shaped indentations as shown in fig. 1a when displaying. Further, there is uneven brightness in the circular hole inner region and the circular hole outer region.
For another example, when the flexible screen and the polyimide substrate are three-dimensionally bonded, the flexible screen may have a phenomenon of uneven stress, so that a display area of the OLED display module has a bottom indentation as shown in fig. 1 b.
When the display screen of the display module is lightened, larger brightness difference and color difference are formed between the indentation position and other display positions around the indentation, so that a user observes clear indentation on the display screen, the display brightness of the OLED display module is uneven, and the display effect and the production yield of the OLED display module are reduced.
Fig. 2 is a flow chart illustrating a method of compensating for display screen indentations according to an exemplary embodiment. Referring to fig. 2, the method comprises the steps of:
s100: detecting the display brightness of a display screen under set gray scale;
s110: when the display brightness difference between the first display area and the second display area of the display screen is larger than or equal to the first difference value, brightness compensation is carried out on the first display area by using a driving voltage higher than a preset threshold value; the second display area surrounds the first display area, and the preset threshold value is a preset driving voltage value for compensating uneven brightness mura of the display screen;
S120: when the display brightness difference after brightness compensation is detected to be smaller than the second difference value, acquiring brightness compensation data of a first display area; wherein the second difference is less than the first difference;
s130: and determining a target Gamma value under the set gray scale according to the brightness compensation data.
The first display area is located within the footprint area and the second display area is located outside the footprint area.
The preset threshold may be a value of a driving voltage for performing brightness compensation in the first display area determined empirically. For example, the display screen may have uneven display brightness due to poor process uniformity, so that the preset threshold value of the driving voltage may be determined according to the influence of the process uniformity on the uneven display brightness.
The optical compensation data may include: when each display unit of the display screen displays the same brightness, the brightness difference is visual. The brightness difference includes, but is not limited to, a visual gray scale difference when displaying the same gray scale.
The optical compensation data, such as demura data, may reflect the on-voltage difference between the on and off of different display cells. The voltage difference may be generated by: poor process uniformity results in different turn-on voltages of the controlled cells included in the display cells and/or the display cells are located in the indentation area of the display screen.
When there is an impression in the display screen due to a physical level difference or the like, the display luminance difference inside and outside the impression area is generally large, for example, greater than or equal to the above-described first difference. Therefore, after the display unit in the impression area is provided with the driving voltage with the value equal to the preset threshold value for brightness compensation, the display brightness difference which can be observed by naked eyes of a user still exists between the inside of the impression area and the outside of the impression area, and the display uniformity degree of the display screen is difficult to improve.
According to the display brightness compensation method and device, the display brightness of the display screen under the set gray level is detected, when the display brightness difference between the first display area and the second display area of the display screen is larger than or equal to the first difference value, the first display area is subjected to brightness compensation by the driving voltage higher than the preset threshold value, the display brightness difference after brightness compensation is checked again, when the display brightness difference is smaller than the second difference value, brightness compensation data of the first display area are obtained, the target Gamma value under the set gray level is determined, gamma of the display screen under different set gray levels can be debugged, so that the display brightness difference between the first display area and the second display area is reduced, at least part of bad display screens with uneven display brightness originally are adjusted to be good products meeting quality requirements, and the display effect and the yield of the display screen are improved.
It can be appreciated that the Gamma value (Gamma) of the display screen under different brightness (for example, 2nit,15nit,30 nit..400 nit.) can be adjusted to correct and compensate the display units located in the first display area under different gray scales, so as to realize uniform display of the screen.
In some embodiments, the first display area includes a plurality of display units arranged side by side along a preset direction, the preset direction pointing to an edge of the first display area along a center of the first display area;
the brightness compensation of the first display area with a driving voltage higher than a preset threshold value comprises:
performing brightness compensation on the first display area along the preset direction by using driving voltages with values decreasing in sequence according to the first variation; and the difference value of the driving voltages provided for the two adjacent display units along the preset direction is a first variation.
Illustratively, the first display area may include: a circular display area; the preset direction is a direction extending from the center point of the circular display area to the edge of the circular display area, and is parallel to the radial direction of the circular display area.
Illustratively, the first display area may include: a bar display area. For example, a rectangular display area, or a square display area.
When the first display area includes a bar display area with central symmetry, and the symmetry center of the bar display area is located inside the bar display area, the preset direction may include: and a direction extending to the edge of the strip-shaped display area by taking the symmetry center of the strip-shaped display area as a starting point.
When the first display area includes an impression, generally, a display unit in the first display area near the center of the impression has a large difference in display luminance from a display unit in the second display area; the display unit in the first display area along the preset direction and close to the edge of the impression has smaller display brightness difference with the display unit in the second display area. Therefore, when the same driving voltage is supplied to all the display units in the first display area, a minute display luminance difference between the different display units arranged in the above-described preset direction is ignored.
In the embodiment of the disclosure, the brightness compensation is performed on the first display area by using the driving voltage with the value decreasing sequentially according to the first variation along the preset direction, so that the fine display brightness difference between different display units in the first display area is fully considered, the accuracy of brightness compensation for each display unit in the first display area can be improved, and the display uniformity is further improved.
In some embodiments, the method further comprises:
when the display brightness difference is detected to be larger than or equal to the second difference value and smaller than the first difference value after brightness compensation, carrying out brightness compensation on the first display area by using driving voltages with values decreasing in sequence according to the second variation along the preset direction;
wherein the second variation is smaller than the first variation; and along the preset direction, the difference value of the driving voltages provided for the two adjacent display units is a second variation.
It is understood that when the difference between the display brightness is greater than or equal to the second difference and less than the first difference after the brightness compensation, the brightness compensation has a certain effect of improving the uneven display brightness, but the user can still observe a certain uneven display brightness.
Therefore, in the embodiment of the disclosure, after performing brightness compensation, when the display brightness difference is greater than or equal to the second difference value and less than the first difference value, the brightness compensation is performed on the first display area along the preset direction by using the driving voltage with the value decreasing sequentially according to the second variation, so that the display brightness difference between the first display area and the second display area can be further reduced, and the display uniformity of the display screen is improved.
And the brightness compensation is performed by using the driving voltages with values decreasing in sequence according to the first variation, and then when the display brightness difference is larger than or equal to the second difference and smaller than the first difference, the brightness compensation is performed by using the driving voltages with values decreasing in sequence according to the second variation, so that the accuracy of the determined optical compensation data is improved.
In some embodiments, the method further comprises: and burning the brightness compensation data into the electronic equipment configured with the display screen.
For example, a storage component can be included in the electronic device. The brightness compensation data can be burnt in the memory component.
According to the embodiment of the disclosure, the brightness compensation data are burnt into the electronic equipment, so that when the electronic equipment displays, display screen indentation compensation can be performed according to the burnt brightness compensation data, at least part of bad electronic equipment with uneven display brightness originally caused by the existence of the indentations is adjusted to be good products meeting the quality requirements, and the display effect of the electronic equipment is improved.
Fig. 3 is a schematic diagram illustrating a display screen indentation compensation arrangement 100 according to an exemplary embodiment. Referring to fig. 3, the compensation device 100 includes:
The detection module 110 is configured to detect display brightness of the display screen under a set gray level;
the driving module 120 performs brightness compensation on the first display area with a driving voltage higher than a preset threshold when the display brightness difference between the first display area and the second display area of the display screen is greater than or equal to the first difference; the second display area surrounds the first display area, and the preset threshold value is a preset driving voltage value for compensating uneven brightness mura of the display screen;
an obtaining module 130, configured to obtain brightness compensation data of the first display area when the display brightness difference after brightness compensation is detected to be smaller than the second difference; wherein the second difference is less than the first difference;
and the determining module 140 is configured to determine a target Gamma value under the set gray scale according to the brightness compensation data.
According to the control device provided by the embodiment of the disclosure, gamma of the display screen under different set gray levels can be debugged, and the target Gamma value under the set gray levels is determined, so that the display brightness difference between the first display area and the second display area is reduced, at least part of bad display screens with uneven display brightness originally are adjusted to be good products meeting the quality requirements, and the display effect and the yield of the display screens are improved.
In some embodiments, the first display area includes a plurality of display units arranged side by side along a preset direction, the preset direction pointing to an edge of the first display area along a center of the first display area;
the driving module is specifically configured to perform brightness compensation in the first display area along the preset direction with a driving voltage whose value decreases in sequence according to the first variation; and the difference value of the driving voltages provided for the two adjacent display units along the preset direction is a first variation.
According to the driving module provided by the embodiment of the disclosure, the fine display brightness difference among different display units in the first display area is fully considered, so that the accuracy of brightness compensation for each display unit in the first display area can be improved, and the display uniformity is further improved.
In some embodiments, the driving module is further configured to perform brightness compensation on the first display area with a driving voltage whose value decreases in sequence according to the second variation along the preset direction when the display brightness difference after brightness compensation is detected to be greater than or equal to the second difference and less than the first difference;
wherein the second variation is smaller than the first variation; and along the preset direction, the difference value of the driving voltages provided for the two adjacent display units is a second variation.
According to the driving module provided by the embodiment of the disclosure, after brightness compensation is performed, when the display brightness difference is greater than or equal to the second difference value and smaller than the first difference value, the first display area is subjected to brightness compensation by using the driving voltage with values decreasing in sequence according to the second variation along the preset direction, so that the display brightness difference between the first display area and the second display area can be further reduced, and the display uniformity of the display screen is improved.
In some embodiments, the apparatus further comprises: and the burning module is used for burning the brightness compensation data into the electronic equipment configured with the display screen.
In the embodiment of the disclosure, the above-mentioned burning module is provided, so that the electronic device can burn the brightness compensation data into the above-mentioned electronic device, and when displaying, the electronic device can perform display screen indentation compensation according to the burned brightness compensation data, so that at least part of bad electronic devices with uneven display brightness originally caused by the existence of indentations are adjusted to be good products meeting the quality requirements, and the display effect of the electronic device is improved.
Fig. 4 is a schematic diagram of an electronic device 200, shown in accordance with an exemplary embodiment. Referring to fig. 4, the electronic apparatus 200 includes:
A display screen 210 including a plurality of display units;
the first driving assembly 221 and the second driving assembly 222 are electrically connected with the display unit, respectively; the driving voltage output by the second driving component is larger than the driving voltage output by the first driving component;
the control component 230 is electrically connected with the display unit, the first driving component and the second driving component respectively, and is used for determining a target driving voltage of the display unit and controlling the first driving component to output the driving voltage to the display unit of which the target driving voltage is smaller than or equal to a preset threshold value; wherein the driving voltage enables the controlled switch of the display unit to work in a saturation region;
the control component 230 is further configured to control the second driving component to output the driving voltage to the display unit with the target driving voltage greater than the preset threshold.
The electronic device 200 may include: a mobile terminal device. Such as a cell phone, notebook computer, tablet computer, or car computer, etc.
The electronic device 200 may further include: an intelligent household device. Such as a television, a floor sweeping robot, or a refrigerator, etc. It can be appreciated that the smart home device has a display function.
The display 210 may include an OLED display. The display screen 210 may include a display array of a plurality of display units.
The first driving assembly 221 may include: a driver IC (driver IC) chip, the second driving assembly 222 may include: a power integrated circuit (power IC) chip.
It should be noted that, when electric signals having the same voltage and current values are input to the first driving assembly 221 and the second driving assembly 222, respectively, the first voltage output by the first driving assembly 221 based on the electric signals is smaller than the second voltage output by the second driving assembly 222 based on the electric signals.
In some embodiments, the first driving assembly 221 may be electrically connected to each display unit included in the display screen 210.
In some embodiments, the first driving assembly 221 may be electrically connected only to the display unit having the target driving voltage less than or equal to the preset threshold. In this way, compared to the first driving component 221 being electrically connected to each display unit included in the display screen 210, the number of wires used for connecting the first driving component 221 and the display unit in the electronic device 200 can be reduced, so as to reduce the layout area occupied by the wires, which is beneficial to reducing the size of the electronic device 200.
It should be emphasized that, whether the first driving component 221 is electrically connected to each display unit included in the display screen 210 or whether the first driving component 221 is electrically connected to only display units having a target driving voltage less than or equal to a preset threshold value, the control component 230 controls the first driving component 221 to output a driving voltage to display units having a target driving voltage less than or equal to the preset threshold value, but not to display units having a target driving voltage greater than the preset threshold value.
The control assembly 230 may include: a general purpose processor chip, a digital signal processor chip, or other logic control chip, etc.
The preset threshold may be any value written in the electronic device 200 in advance, for example, the preset threshold may be experimental data measured in a laboratory, or the preset threshold may be an empirical value obtained according to display brightness unevenness of the display screen 210. Specifically, the preset threshold may be 3 volts, 3.5 volts, or 4 volts.
In the embodiment of the disclosure, by setting the output driving voltage to be greater than the second driving component 222 of the first driving component 221, the driving voltage can be output to the display unit with the target driving voltage greater than the preset threshold through the second driving component 222, and compared with the driving voltage output to the display unit with the target driving voltage greater than the preset threshold through the first driving component 221, the uneven display brightness caused by the fact that the driving voltage output by the first driving component 221 is less than the preset driving voltage can be reduced, and the display effect is improved.
In addition, compared with the case that the first driving component 221 outputs the driving voltage to the display unit with the target driving voltage greater than the preset threshold, the embodiment of the disclosure introduces the second driving component 222 capable of increasing the driving voltage, and increases the driving voltage through the second driving voltage component, so that the display unevenness is visually reduced, at least part of bad electronic devices with uneven display brightness originally caused by the fact that the driving voltage output by the first driving component 221 is smaller than the target driving voltage are adjusted to be good products meeting the quality requirements, and the improvement of the yield of the electronic devices 200 is facilitated.
In some embodiments, the electronic device further comprises:
a storage component for storing indication information of the display unit with the target driving voltage larger than a preset threshold value;
and the control component 230 is electrically connected with the storage component and is used for reading and controlling the second driving component to output driving voltage to the display unit indicated by the indication information according to the indication information.
The storage assembly may include: nonvolatile memory, and the like.
The display screen 210 may include a display array of a plurality of display units.
The indication information may include: coordinate indicating parameters indicating the position of the display unit with the target driving voltage greater than the preset threshold value in the display array, sequence indicating parameters indicating the refreshing sequence of the display unit with the target driving voltage greater than the preset threshold value in each display refreshing process, and the like.
The above indication information may be written in advance in a predetermined storage area of the storage component, for example, in a predetermined flash memory (flash) during the production process of the electronic device 200.
The control unit 230 stores a storage address of the predetermined storage area, and the control unit 230 reads the optical compensation data from the predetermined storage area according to the storage address after power-up.
In the embodiment of the disclosure, by setting the storage component, the control component 230 can read and determine, according to the indication information stored in the storage component, a display unit with a target driving voltage greater than a preset threshold, so as to control the second driving component 222 to output the driving voltage to the display unit with the target driving voltage greater than the preset threshold, which is simple.
In some embodiments, the control component 230 is configured to obtain optical compensation data of the display unit, and determine that the target driving voltage of the display unit is less than or equal to a preset threshold value when the optical compensation data of the display unit is less than or equal to the preset compensation data;
the control component 230 is further configured to determine that the target driving voltage of the display unit is greater than a preset threshold value when the optical compensation data of the display unit is greater than the preset compensation data.
The optical compensation data may be test brightness difference data when the display screen 210 is tested for brightness non-uniformity. The test luminance difference data may include: each display unit of the display screen 210 has a visually different brightness when displaying the same brightness. The brightness difference includes, but is not limited to, a visual gray scale difference when displaying the same gray scale.
The optical compensation data, such as demura data, may reflect the on-voltage difference between the on and off of different display cells. The voltage difference may be generated by: poor process uniformity results in different turn-on voltages of the controlled cells included in the display cells and/or the display cells being located in the indentation area of the display screen 210.
It is noted that when the brightness difference due to the indentation is small, the preset driving voltage in the display unit located in the indentation area is less than or equal to the preset threshold value. When the brightness difference caused by the indentation is large, the preset driving voltage in the display unit positioned in the indentation area is larger than the display unit with the preset threshold value.
For the display screen 210 with the indentation, the difference of brightness between the inside and outside of the indentation area is large due to the physical level difference, and the uneven brightness of the indentation area is also generated due to the poor process uniformity, so when the difference of brightness caused by the indentation is large, a large preset driving voltage and current are required for driving the display unit in the indentation area to perform the brightness display, so as to compensate for the uneven brightness of the display caused by the indentation and the process uniformity. It should be noted that the preset driving voltage of the display unit in the indentation area is greater than the preset driving voltage of the display unit outside the indentation area.
In the embodiment of the present disclosure, the preset compensation data may be any value written in the display screen 210 in advance, for example, the preset threshold may be experimental data measured in a laboratory, or an empirical value according to uneven display brightness of the display screen 210. For example, the predetermined threshold may be 3 volts, 3.5 volts, 4 volts, or the like.
In the related art, the electronic device 200 having poor uniformity of display brightness due to the indentation is used as a defective product, and the product yield is reduced, instead of repairing the display brightness unevenness due to the indentation.
Alternatively, in the related art, the first driving component 221 may also provide the output voltage to the display unit with the preset driving voltage greater than the preset threshold, however, because the color difference is greater due to the indentation, the driving voltage output by the first driving component 221 is smaller than the preset driving voltage of the display unit, so that the display brightness non-uniformity still exists in the indentation area, so that the electronic device 200 still cannot meet the display uniformity.
According to the embodiment of the disclosure, the control component 230 is arranged to obtain the optical compensation data of the display unit, when the optical compensation data of the display unit is larger than the preset compensation data, the preset driving voltage of the display unit is determined to be larger than the preset threshold value, and the second driving component 222 is controlled to output the driving voltage to the display unit, compared with the case that the first driving component 221 outputs the driving voltage to the display unit with the preset driving voltage larger than the preset threshold value, the display brightness non-uniformity phenomenon caused by the fact that the driving voltage output by the first driving component 221 is smaller than the preset driving voltage can be reduced, and the display effect is improved.
In addition, compared with the case that the first driving component 221 outputs the driving voltage to the display unit with the preset driving voltage greater than the preset threshold, the second driving component 222 is provided, so that the display effect is improved, and the display brightness difference between the inside of the indentation area and the outside of the indentation area in the flexible display screen 210 can be reduced, so that the driving voltage is originally output to the display unit with the preset driving voltage greater than the preset threshold in the indentation area by the first driving component 221, and at least part of the bad electronic equipment 200 with uneven display brightness still exists can be adjusted to be good products meeting the requirement of uniformity of the display brightness, and the yield of the electronic equipment is improved.
In some embodiments, referring to fig. 5, the display unit may include:
a first controlled switch 211;
a second controlled switch 212;
a capacitor 213;
the light emitting diode 214 is connected to the second controlled switch 212, and is used for realizing the integral display of the display screen 210 with other display units through self luminescence or non-self luminescence.
The first controlled switch 211 may include: the first controlled terminal may be connected to a Scan line (Scan) of the display screen 210, and is configured to control whether the first input terminal and the first output terminal are turned on based on a Scan voltage on the Scan line. The first input terminal is connected to the first driving device 221 and the second driving device 222, respectively, for receiving a driving voltage (Vdata). The first output is connected to the second controlled switch 212. The first controlled switch 211 may include a transistor, such as a MOS transistor or a triode.
Taking the first controlled switch 211 as an MOS transistor as an example, the MOS transistor may include: source (Source), drain (Drain), and Gate (Gate). The first controlled end is a gate of the MOS transistor, and the gate of the MOS transistor is connected to a scan line of the display screen 210, for controlling whether the display unit is turned on or not. The first input terminal may be a source; the first output terminal may be a drain.
The second controlled switch 212 may include: the second controlled terminal is connected to the output terminal of the first controlled switch 211, the second input terminal is connected to the power line (VDD) of the display screen 210, and the second output terminal is connected to the anode of the light emitting diode 214. The second controlled switch 212 may include a transistor, such as a MOS transistor or a triode.
Taking the example that the second controlled switch 212 is a MOS transistor, the MOS transistor may include: source (Source), drain (Drain), and Gate (Gate). The second controlled terminal is a gate of the MOS transistor, and the gate of the MOS transistor may be connected to the first output terminal of the first controlled switch 211, for controlling whether the second controlled switch 212 is turned on. The second input terminal may be a source; the second output terminal may be a drain.
When the second controlled switch 212 is a MOS transistor, the switching characteristics of the second controlled switch 212 may be as shown in fig. 6. V (V) GS V is the voltage between the grid electrode and the source electrode of the MOS tube DS Is the voltage between the drain electrode and the source electrode of the MOS tube, I D Is the current flowing through the source. In the variable resistance region of the MOS tube, along with V DS Is gradually increased in absolute value, I D The absolute value of (c) increases rapidly until the saturation region is entered, at which point the led 214 emits light.
The brightness of the light emitting diode 214 is controlled by the second controlled switch 212. Specifically, taking the second controlled switch 212 as an MOS transistor as an example, as shown in fig. 5 and 6, in the saturation region of the MOS transistor, in a certain range, along with V GS The absolute value of (a) increases, the current I D To increase the brightness produced by the light emitting diode 214. Due to V of the second controlled switch 212 GS As to the output voltage of the first controlled switch 211, the brightness of the display unit may be controlled by inputting the driving voltage Vdata of the first controlled switch 211.
Because the turn-on voltage of the second controlled switch 212 may be different in each display unit due to the problem of process uniformity, the voltage applied to the light emitting diode 214 is different, and the light emitting diode 214 in each display unit emits light based on the different voltage, resulting in different light emitting luminance of different display units. If the switching voltage difference between different display units is large, the phenomenon of uneven display brightness can occur.
A capacitor 213 is connected in parallel with the second controlled switch 212. Taking the capacitor 213 as a parallel plate capacitor, a first plate of the parallel plate capacitor is connected to the second controlled terminal, and a second plate of the parallel plate capacitor is connected to the second input terminal.
The light emitting diode 214 includes an anode and a cathode, wherein the anode voltage of the anode is the power supply voltage VDD; the cathode voltage of the cathode is VSS.
In some embodiments, referring to fig. 7, the display screen 210 includes: a display region 210a and a non-display region 210b located outside the display region;
the electronic device 200 further includes: a first circuit board 241 and a second circuit board 242;
the first driving component 221 is located in the non-display area 210b and connected with the control component 230 through the first circuit board 241 and the second circuit board 242 in sequence;
the second driving assembly 222 is disposed on the first circuit board 241 and is connected to the control assembly 230 (not shown) through the second circuit board 242.
The display area 210a is located on a surface of the electronic device 200 facing the user.
The first driving assembly 221 may be located on the same surface of the display screen 210 as the display area, or the first driving assembly 221 may be located on the opposite surface of the display screen 210 from the display area. It should be noted that, when the first driving element 221 may be located on the same surface of the display screen 210 as the display area, the surface of the first driving element 221 may be covered with the light shielding layer, so that the user does not observe the first driving element 221.
Both the first circuit board 241 and the second circuit board 242 may be bent. Accordingly, the first circuit board 241 and/or the second circuit board 242 may be bent as needed in the electronic device 200 or straight as shown in fig. 7.
The first driving unit 221 may be fixed to the non-display area 210b. The second driving component 222 may be fixed on the first circuit board 241.
In some embodiments, the electronic device 200 includes:
a housing having an opening;
a display screen 210 exposed through the opening;
the first driving component 221 is located on the non-display area 210b and faces the inside of the housing;
the first circuit board 241, the second circuit board 242, and the second driving assembly 222 are disposed in a cavity formed by the display screen 210 and the housing.
In some embodiments, the electronic device 200 further comprises:
the power supply assembly is electrically connected with the first driving assembly 221 and the second driving assembly 222 respectively and is used for providing a preset voltage;
a first driving component 221 for converting the received preset voltage into a driving voltage having a first voltage value according to a first ratio;
a second driving component 222 for converting the received preset voltage into a driving voltage having a second voltage value according to a second ratio; wherein the second voltage value is greater than the first voltage value.
The power supply assembly may include: electrochemical cells, biological cells, or physical cells, etc. Such as lithium ion batteries, enzymatic batteries or solar cells.
The first driving component 221 may include a first power amplifier, and the second driving component 222 may include a second power amplifier, so that the first driving component may amplify into a driving voltage according to the received preset voltage, and further drive the display unit to display.
Fig. 8 is a block diagram illustrating a production system 300 of an electronic device 200, according to an example embodiment. Referring to fig. 8, a system 300 includes:
display screen production equipment 310;
the first adjusting device 321 is communicated with the display screen production device 310, and is configured to obtain optical compensation data of uneven brightness of the display screen 210, and increase a preset driving voltage value of a display unit in the display screen 210 of the display screen 210 from a current voltage value to a preset threshold value when the optical compensation data is greater than the preset compensation data; the control switch of the display unit works in a saturation region by presetting a driving voltage;
the second adjusting device 322 is communicated with the first adjusting device 321, and is configured to obtain a current brightness value of the display unit when a preset driving voltage value of the display unit is a preset threshold value, and increase the value of the preset driving voltage from the preset threshold value to a second voltage value according to a difference value between the current brightness value and the target brightness value when the current brightness value is smaller than the target brightness value; the second voltage value is a value of a driving voltage output by the second driving component 222 to the display unit.
The display production apparatus 310 is used to produce the display 210. It should be noted that the display production apparatus 310 may also assemble the first driving assembly 221, the second driving assembly 222 and the display 210.
The preset compensation data may be determined according to a driving voltage that the first driving assembly 221 can output. It can be understood that when the optical compensation data of the display unit is greater than the preset compensation data, the preset driving voltage of the display unit is outside the driving voltage range that the first driving component 221 can output, that is, when the first driving component 221 provides the driving voltage to the display unit, the display brightness non-uniformity phenomenon still exists.
When the optical compensation data of the display unit is less than or equal to the preset compensation data, the preset driving voltage of the display unit is within the driving voltage range that the first driving component 221 can output, that is, the output voltage provided by the first driving component 221 can repair the uneven display brightness of the display unit.
The first adjustment device 321 may provide the same driving voltage Vdata to each display unit in the display screen 210 to light the display screen 210 to display a solid-color picture, then capture a picture of the lit display screen 210, obtain a first image, and obtain the optical compensation data according to the first image.
When the optical compensation data of the display unit is greater than the preset compensation data, the display unit is located in the indentation area of the display screen 210, and a larger driving voltage needs to be provided to the display unit to reduce the display brightness non-uniformity. At this time, the first adjustment device 321 may set the preset driving voltage of the display unit to a preset threshold value.
It should be noted that, when the display screen 210 includes a display unit whose optical compensation data is greater than the preset compensation data, and the driving voltage output to the display unit whose optical compensation data is greater than the preset compensation data is equal to the preset threshold, the brightness of the display unit still has a brightness difference between other display units, that is, the display screen 210 still has uneven display brightness. Therefore, it needs to be adjusted again.
And when the preset driving voltage value of the display unit is a preset threshold value and the current brightness is equal to the target brightness value, keeping the preset driving voltage value of the display unit as the preset threshold value. The first driving component 221 may be configured to output a driving voltage having a preset threshold value to the display unit.
By setting the second adjusting device 322, when detecting that the display screen 210 includes a display unit with a preset driving voltage value being a preset threshold value, the embodiment of the disclosure lights the display screen 210 again to obtain the current brightness value of the display unit; when the current brightness value is smaller than the target brightness value, the value of the preset driving voltage is increased from the preset threshold value to the second voltage value according to the difference value between the current brightness value and the target brightness value, so that brightness compensation can be performed on the display screen 210 with larger display brightness difference, the display quality of the manufactured electronic equipment 200 is ensured, and the yield of the electronic equipment 200 is improved.
In some embodiments, the second adjusting device 322 is further configured to generate the indication information and write the indication information into the storage component of the electronic device 200; the indication information is used for indicating the target driving voltage to be a display unit with a second voltage value.
The indication information may include: coordinate indicating parameters indicating the position of the display unit with the target driving voltage greater than the preset threshold value in the display array, sequence indicating parameters indicating the refreshing sequence of the display unit with the target driving voltage greater than the preset threshold value in each display refreshing process, and the like.
In the embodiment of the disclosure, the second adjusting device 322 generates the indication information and writes the indication information into the storage component of the electronic device 200, and in the operation process of the electronic device 200, the control component 230 in the electronic device 200 can read and determine, according to the indication information stored in the storage component, the display unit with the target driving voltage greater than the preset threshold, so as to control the second driving component 222 to output the driving voltage to the display unit with the target driving voltage greater than the preset threshold.
In some embodiments, the first adjusting device 321 is further configured to increase the value of the target driving voltage of the display unit from the current voltage to a first voltage value less than or equal to the preset threshold according to the difference between the optical compensation data and the preset threshold when the optical compensation data is less than or equal to the preset threshold; the first voltage value is a value of a driving voltage output by the first driving component 221 to the display unit.
When the optical compensation data is smaller than or equal to the preset threshold, the brightness difference of the display screen 210 is considered to be smaller, and at this time, the driving voltage provided by the first adjusting device can compensate for the display brightness non-uniformity, so that the display uniformity of the display screen 210 meets the user requirement.
It can be understood that, when the display screen 210 has uneven display brightness only due to process uniformity or the color difference of the display screen 210 due to indentation is small, the preset driving voltage of the display unit is within the driving voltage range that can be provided by the first adjusting device, so that the preset driving voltage of the display unit can be determined to be the first voltage value by the first adjusting device, and the display screen 210 does not need to be adjusted by the second adjusting device.
When the first adjustment device acquires the optical compensation data, since the driving voltage supplied to each display unit by the first adjustment device is the same, theoretically the luminance of each display unit in the first image is the same. If the brightness difference is detected in the first image under the same gray level, the first adjusting device can compensate and debug the brightness difference.
For example, taking the example of the display 210 having circular hole-shaped indentations as shown in fig. 1a, the presence of indentations in the circular hole area results in a brightness difference. The first adjusting device can perform brightness compensation on the display unit positioned in the round hole under the same gray scale.
Specifically, for example, the brightness of the display unit positioned outside the round hole is Lv, and the display unit positioned in the round holeThe brightness of the display unit is Lv-delta Lv The first adjusting device 321 may adjust the driving voltage provided to the in-round hole display unit to vdata+δ Vdata . Thus, by adding a delta Vdata To increase the current of the display unit located in the circular hole, thereby increasing the brightness of the display unit in the circular hole by adjusting the current, so as to reduce the brightness difference between the display unit in the circular hole area and the display unit in the circular hole area outside the circular hole.
In some embodiments, the first adjusting device 321 and the second adjusting device 322 may respectively debug Gamma values (Gamma) of the display screen 210 under different brightness (for example, 2nit,15nit,30 nit..400 nit), correct and compensate the display unit of each gray-scale model of the Gamma in the circular hole, and finally realize uniform display of the screen.
FIG. 9 is a schematic workflow diagram of a production system, according to an exemplary embodiment. Referring to fig. 9, when the electronic apparatus 200 has uneven electrical picture due to the difference of the on-voltage of the controlled switch, the first type of patch repair compensation (Demura 1) is performed on the electronic apparatus 200 through the first adjustment device 321.
For the display brightness caused by the electric picture non-uniformity, the optical compensation data of the display unit is less than or equal to the preset compensation data, and thus, the preset driving voltage of the display unit is less than or equal to the preset threshold value, and the driving voltage Vdata can be provided through the first driving component 221 (e.g., the driving IC). At this time, after the electric image unevenness is debugged, the color difference repair of the indentation area is performed, that is, the second type of patch repair compensation (Demura 2) is performed on the electronic device 200 through the second adjusting device.
For the repairing of the color difference of the indentation area, when the color difference of the indentation area is smaller, the optical compensation data of the display unit in the indentation area is smaller than or equal to the preset compensation data, and therefore, the target driving voltage of the display unit is smaller than or equal to the preset threshold, that is, the Vdata value range of the display unit is within the threshold range of the first driving component 221 (for example, the driving IC), and the driving voltage Vdata can also be provided by the first driving component 221 (for example, the driving IC) to perform the repairing of the color difference.
When the color difference in the indentation area is larger, the first type of patch repair compensation (Demura 1) is performed on the electronic device 200 by the first adjusting device 321, and the optical compensation data of the display unit in the indentation area is larger than the preset compensation data, so that the target driving voltage of the display unit is larger than the preset threshold, that is, the Vdata value range of the display unit exceeds the threshold range of the first driving component 221 (for example, driving IC), and at this time, the driving voltage Vdata needs to be provided to the display unit with the optical compensation data larger than the preset compensation data by the second driving component 222 (for example, demura Power IC) to perform the color difference repair.
After the chromatic aberration of the indentation area disappears, the second type of striation repairing, compensating and repairing is finished.
Fig. 10 is a block diagram illustrating an apparatus 800 for display according to an exemplary embodiment. For example, apparatus 800 may be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, fitness device, personal digital assistant, or the like.
The apparatus 800 includes a multimedia component 808. The multimedia component 808 includes the electronic device 200 provided by embodiments of the present disclosure. The multimedia component 808 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation.
In some embodiments, the multimedia component 808 includes a front camera and/or a rear camera. The front camera and/or the rear camera may receive external multimedia data when the apparatus 800 is in an operational mode, such as a photographing mode or a video mode. Each front camera and/or rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.
Referring to fig. 10, the apparatus 800 may further include one or more of the following components: a processing component 802, a memory 804, a power component 806, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.
The processing component 802 generally controls overall operation of the apparatus 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to perform all or part of the steps of the methods described above. In addition, the processing component 802 can also include one or more modules that facilitate interactions between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.
The memory 804 is configured to store various types of data to support operations at the apparatus 800. Examples of such data include instructions for any application or method operating on the device 800, contact data, phonebook data, messages, pictures, video, and the like. The memory 804 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically Erasable Programmable Read Only Memory (EEPROM), erasable Programmable Read Only Memory (EPROM), programmable Read Only Memory (PROM), read Only Memory (ROM), magnetic memory, flash memory, magnetic or optical disk.
The power supply component 806 provides power to the various components of the device 800. The power supply assembly 806 may include: a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for device 800.
The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the device 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 further includes a speaker for outputting audio signals.
The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.
The sensor assembly 814 includes one or more sensors for providing status assessment of various aspects of the apparatus 800. For example, the sensor assembly 814 may detect the on/off state of the device 800, the relative positioning of the components, such as the display and keypad of the device 800, the sensor assembly 814 may also detect a change in position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration/deceleration of the device 800, and a change in temperature of the device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 816 is configured to facilitate communication between the apparatus 800 and other devices, either in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In one exemplary embodiment, the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, or other technologies.
In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (9)

1. A method for compensating for display screen impressions, comprising:
detecting the display brightness of a display screen under set gray scale;
when the display brightness difference between the first display area and the second display area of the display screen is larger than or equal to a first difference value, brightness compensation is carried out on the first display area by using a driving voltage higher than a preset threshold value; the second display area surrounds the first display area, and the preset threshold value is a preset driving voltage value for compensating uneven brightness mura of the display screen; the first display area comprises a plurality of display units which are arranged in parallel along a preset direction, and the preset direction points to the edge of the first display area along the center of the first display area; the brightness compensation of the first display area with a driving voltage higher than a preset threshold value includes: performing brightness compensation on the first display area along the preset direction by using driving voltages with values decreasing in sequence according to the first variation; the difference value of the driving voltages provided for two adjacent display units along the preset direction is the first variation;
When the display brightness difference after the brightness compensation is detected to be smaller than a second difference value, acquiring brightness compensation data of the first display area; wherein the second difference is less than the first difference;
and determining a target Gamma value under the set gray scale according to the brightness compensation data.
2. The method of claim 1, wherein the first display area comprises:
a circular display area; the preset direction is a direction extending from the center point of the circular display area to the edge of the circular display area, and is parallel to the radial direction of the circular display area;
or alternatively, the first and second heat exchangers may be,
a bar display area.
3. The method according to claim 1, wherein the method further comprises:
when the display brightness difference is detected to be larger than or equal to the second difference value and smaller than the first difference value after brightness compensation, carrying out brightness compensation on the first display area by using driving voltages with values decreasing in sequence according to a second variation along the preset direction;
wherein the second variation is smaller than the first variation; and along the preset direction, the difference value of the driving voltages provided for the two adjacent display units is the second variation.
4. The method according to claim 1, wherein the method further comprises:
and burning the brightness compensation data into the electronic equipment configured with the display screen.
5. A display screen indentation compensation device, comprising:
the detection module is used for detecting the display brightness of the display screen under the set gray level;
the driving module is used for carrying out brightness compensation on the first display area by using a driving voltage higher than a preset threshold value when the display brightness difference between the first display area and the second display area of the display screen is larger than or equal to a first difference value; the second display area surrounds the first display area, and the preset threshold value is a preset driving voltage value for compensating uneven brightness mura of the display screen; the first display area comprises a plurality of display units which are arranged in parallel along a preset direction, and the preset direction points to the edge of the first display area along the center of the first display area; the driving module is specifically configured to perform brightness compensation in the first display area along the preset direction with a driving voltage that sequentially decreases according to a first variation value; the difference value of the driving voltages provided for two adjacent display units along the preset direction is the first variation;
The acquisition module is used for acquiring the brightness compensation data of the first display area when the display brightness difference after brightness compensation is detected to be smaller than the second difference value; wherein the second difference is less than the first difference;
and the determining module is used for determining the target Gamma value under the set gray scale according to the brightness compensation data.
6. The apparatus of claim 5, wherein the device comprises a plurality of sensors,
the driving module is further configured to perform brightness compensation on the first display area with a driving voltage whose value decreases in sequence according to a second variation along the preset direction when the display brightness difference is detected to be greater than or equal to the second difference and less than the first difference after brightness compensation is performed;
wherein the second variation is smaller than the first variation; and along the preset direction, the difference value of the driving voltages provided for the two adjacent display units is the second variation.
7. The apparatus of claim 5, wherein the apparatus further comprises:
and the burning module is used for burning the brightness compensation data into the electronic equipment configured with the display screen.
8. An electronic device, comprising:
A display screen including a plurality of display units;
the first driving assembly and the second driving assembly are respectively and electrically connected with the display unit; the driving voltage output by the second driving component is larger than the driving voltage output by the first driving component;
the control assembly is respectively and electrically connected with the display unit, the first driving assembly and the second driving assembly and is used for determining target driving voltage of the display unit and controlling the first driving assembly to output driving voltage to the display unit with the target driving voltage smaller than or equal to a preset threshold value; wherein the driving voltage enables the controlled switch of the display unit to work in a saturation region;
the control component is further used for controlling the second driving component to output driving voltage to the display unit of which the target driving voltage is larger than the preset threshold value; the control component is specifically configured to control the second driving component to perform brightness compensation on the first display area with a driving voltage higher than a preset threshold when a display brightness difference between the first display area and the second display area of the display screen is greater than or equal to a first difference value; the second display area surrounds the first display area, and the preset threshold value is a preset driving voltage value for compensating uneven brightness mura of the display screen; the first display area comprises a plurality of display units which are arranged in parallel along a preset direction, and the preset direction points to the edge of the first display area along the center of the first display area; the second driving component is specifically configured to perform brightness compensation on the first display area along the preset direction with a driving voltage that is sequentially decreased by a first variation value; and the difference value of the driving voltages provided for two adjacent display units along the preset direction is the first variation.
9. The electronic device of claim 8, wherein the electronic device further comprises:
a storage component for storing indication information of the display unit with the target driving voltage larger than the preset threshold value;
the control component is electrically connected with the storage component and used for reading and controlling the second driving component to output driving voltage to the display unit indicated by the indication information according to the indication information.
CN202011413989.0A 2020-12-03 2020-12-03 Display screen indentation compensation method, compensation device and electronic equipment Active CN114596812B (en)

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