CN112419948B - Display substrate, control method thereof and display device - Google Patents
Display substrate, control method thereof and display device Download PDFInfo
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- CN112419948B CN112419948B CN202011378137.2A CN202011378137A CN112419948B CN 112419948 B CN112419948 B CN 112419948B CN 202011378137 A CN202011378137 A CN 202011378137A CN 112419948 B CN112419948 B CN 112419948B
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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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]
- G09G3/3225—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] using an active matrix
- G09G3/3233—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] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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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
- 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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Abstract
The invention relates to a display substrate, a control method thereof and a display device. The display substrate comprises a display area, a first sub-pixel, a second sub-pixel and a control chip; the display area comprises a detection sub-area and a pixel sub-area; the first sub-pixel is positioned in the detection sub-area, the second sub-pixel is positioned in the pixel sub-area, and the light emitting colors of the first sub-pixel and the second sub-pixel are the same; the control chip collects a first signal value of a first electric signal of the first sub-pixel when the first sub-pixel and the second sub-pixel work, and outputs a control instruction when the first signal value is out of a reference range, the control instruction is used for adjusting a second signal value and the first signal value of a second electric signal of the second sub-pixel to be within the reference range, and the type of the second electric signal is the same as that of the first electric signal; the first signal value is positively correlated with the light-emitting brightness of the first sub-pixel, or the first signal value is negatively correlated with the light-emitting brightness of the first sub-pixel. According to the embodiment of the invention, display brightness abnormality can be alleviated.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display substrate, a control method of the display substrate and a display device.
Background
In the related art, organic Light Emitting Diodes (OLEDs), which have the characteristics of high contrast, wide viewing angle, flexible display, etc., have been applied to more and more display devices, such as mobile phones and computers. Moreover, the current popular full-screen is preferred by each large terminal company because of its higher visual impact and display effect. However, when the OLED display screen is displayed at high brightness and high contrast for a long time, the brightness of the picture may be uneven due to different brightness attenuations of different pixels, and dark spots or bright spots may occur. Moreover, the brightness of different pixels of the OLED display screen is inconsistent with the temperature variation, which causes the white balance point of the screen to move, resulting in color shift.
Therefore, how to control the display device to alleviate the brightness abnormality is a technical problem to be solved.
Disclosure of Invention
The invention provides a display substrate, a control method thereof and a display device, and aims to overcome the defects in the related art.
According to a first aspect of the embodiments of the present invention, a display substrate is provided, which includes a display area, a first sub-pixel, a second sub-pixel, and a control chip;
the display area comprises a detection sub-area and a pixel sub-area; the detection sub-region is adjacent to the pixel sub-region;
the first sub-pixel is positioned in the detection sub-area, the second sub-pixel is positioned in the pixel sub-area, and the light-emitting color of the first sub-pixel is the same as that of the second sub-pixel;
the control chip is used for acquiring a first signal value of a first electric signal of the first sub-pixel when the first sub-pixel and the second sub-pixel work, and outputting a control instruction when the first signal value is out of a reference range, wherein the control instruction is used for adjusting a second signal value of a second electric signal of the second sub-pixel and the first signal value to be within the reference range, and the type of the second electric signal is the same as the type of the first electric signal;
the first signal value is positively correlated with the light-emitting brightness of the first sub-pixel, and the second signal value is positively correlated with the light-emitting brightness of the second sub-pixel, or the first signal value is negatively correlated with the light-emitting brightness of the first sub-pixel, and the second signal value is negatively correlated with the light-emitting brightness of the second sub-pixel.
In one embodiment, the type of the second electrical signal and the type of the first electrical signal are both current signals, the first signal value and the second signal value are both current values, the reference range is a current value reference range, the first signal value is positively correlated with the light-emitting brightness of the first sub-pixel, and the second signal value is positively correlated with the light-emitting brightness of the second sub-pixel; alternatively, the first and second liquid crystal display panels may be,
the type of the second electrical signal and the type of the first electrical signal are both voltage signals, the first signal value and the second signal value are both voltage values, the reference range is a voltage value reference range, the first signal value is negatively correlated with the light-emitting brightness of the first sub-pixel, and the second signal value is negatively correlated with the light-emitting brightness of the second sub-pixel.
In one embodiment, when the type of the second electrical signal and the type of the first electrical signal are both current signals, the minimum value of the reference range is the minimum gray-scale current of the first sub-pixel at room temperature, and the maximum value of the reference range is the maximum gray-scale current of the first sub-pixel at room temperature;
when the type of the second electrical signal and the type of the first electrical signal are both voltage signals, the minimum value of the reference range is the minimum gray scale voltage of the first sub-pixel under the room temperature condition, and the maximum value of the reference range is the maximum gray scale voltage of the first sub-pixel under the room temperature condition.
In one embodiment, the display substrate further includes: the pixel circuit comprises a substrate, a first pixel circuit and a second pixel circuit;
the first pixel circuit and the second pixel circuit are positioned on the substrate, the first sub-pixel is positioned on one side of the first pixel circuit, which is far away from the substrate, and the first pixel circuit is electrically connected with the first sub-pixel; the second sub-pixel is positioned on one side of the second pixel circuit far away from the substrate, and the second pixel circuit is electrically connected with the second sub-pixel;
the driving mode of the first sub-pixel is a passive mode; the first pixel circuit comprises only one electronic switch; the driving mode of the second sub-pixel is an active mode.
In one embodiment, the light transmittance of the detector sub-region is greater than the light transmittance of the pixel sub-region; the display substrate further comprises a fingerprint identification area, and the fingerprint identification area is located in the detection sub-area.
In one embodiment, the display substrate further includes a driving chip, and a projection of the driving chip on the display substrate at least partially overlaps with the detection sub-region.
In one embodiment, the sub-detection region is located at an edge of the display region, and/or the sub-pixel region is located at an edge of the display region.
In one embodiment, the detection sub-region is located at a corner of the display region, and/or the pixel sub-region is located at a corner of the display region.
In one embodiment, the detection sub-region is located at an edge of the display region and surrounds the pixel sub-region.
According to a second aspect of embodiments of the present invention, there is provided a display device including: the display substrate is provided.
In one embodiment, the display substrate further includes a substrate, a first pixel circuit and a second pixel circuit, the first pixel circuit and the second pixel circuit are located on the substrate, the light transmittance of the detection sub-region is greater than that of the pixel sub-region, the display substrate further includes a fingerprint identification region, the fingerprint identification region is located in the detection sub-region, the display device further includes a fingerprint identification component, the fingerprint identification component is located on one side of the substrate away from the first pixel circuit, and a projection of the fingerprint identification component on the display substrate is located in the fingerprint identification region.
According to a third aspect of embodiments of the present invention, there is provided a control method of a display substrate, the display substrate including a display area, a first sub-pixel, and a second sub-pixel; the display area comprises a detection sub-area and a pixel sub-area; the detection sub-region is adjacent to the pixel sub-region; the first sub-pixel is positioned in the detection sub-area, the second sub-pixel is positioned in the pixel sub-area, and the light-emitting color of the first sub-pixel is the same as that of the second sub-pixel; the method comprises the following steps:
acquiring a first signal value of a first electric signal of the first sub-pixel when the first sub-pixel and the second sub-pixel work;
when the first signal value is out of a reference range, adjusting a second signal value of a second electric signal of the second sub-pixel and the first signal value to be in the reference range, wherein the type of the second electric signal is the same as that of the first electric signal; the first signal value is positively correlated with the light-emitting brightness of the first sub-pixel, and the second signal value is positively correlated with the light-emitting brightness of the second sub-pixel, or the first signal value is negatively correlated with the light-emitting brightness of the first sub-pixel, and the second signal value is negatively correlated with the light-emitting brightness of the second sub-pixel.
According to the above embodiment, since the display substrate includes the display area, the first sub-pixel, the second sub-pixel and the control chip, the display area includes the detector sub-area and the pixel sub-area, the detector sub-area is adjacent to the pixel sub-area, the first sub-pixel is located in the detector sub-area, the second sub-pixel is located in the pixel sub-area, the light emitting color of the first sub-pixel is the same as the light emitting color of the second sub-pixel, the control chip collects the first signal value of the first electrical signal of the first sub-pixel when the first sub-pixel and the second sub-pixel are operated, and outputs the control instruction when the first signal value is located outside the reference range, the control instruction is used to adjust the second signal value of the second electrical signal of the second sub-pixel and the first signal value to be within the reference range, and since the first signal value is positively correlated to the light emitting luminance of the first sub-pixel, the second signal value is positively correlated to the light emitting luminance of the second sub-pixel, or the first signal value is negatively correlated to the light emitting luminance of the first sub-pixel, the second sub-pixel, and the abnormal luminance can be detected, and the abnormal luminance display can be performed, and whether the abnormal luminance display can be determined.
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 invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic structural diagram of a display substrate according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 4 is a schematic diagram showing the relationship between the current and the temperature of a sub-pixel according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of another display substrate according to an embodiment of the present invention;
fig. 7 is a schematic structural view showing a display device according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating a method of controlling a display substrate according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The embodiment of the invention provides a display substrate. As shown in fig. 1, the display substrate includes: a display region 11, a first sub-pixel (not shown), a second sub-pixel (not shown), a first pixel circuit (not shown), a second pixel circuit (not shown), and a control chip (not shown); the display area 11 includes a detection sub-area 111 and a pixel sub-area 112; the detection sub-region 111 is adjacent to the pixel sub-region 112; the first sub-pixel is located in the detection sub-region 111, the second sub-pixel is located in the pixel sub-region 112, and the light emitting color of the first sub-pixel is the same as the light emitting color of the second sub-pixel.
In this embodiment, the control chip is configured to acquire a first signal value of a first electrical signal of the first subpixel when the first subpixel and the second subpixel operate, and output a control instruction when the first signal value is outside a reference range, where the control instruction is used to adjust a second signal value and the first signal value of a second electrical signal of the second subpixel to be within the reference range, and a type of the second electrical signal is the same as a type of the first electrical signal.
In this embodiment, the first signal value is positively correlated with the light-emitting luminance of the first sub-pixel, and the second signal value is positively correlated with the light-emitting luminance of the second sub-pixel. Or the first signal value is inversely related to the light-emitting brightness of the first sub-pixel, and the second signal value is inversely related to the light-emitting brightness of the second sub-pixel.
In this embodiment, the display substrate includes a display area, a first sub-pixel, a second sub-pixel, and a control chip, the display area includes a detection sub-area and a pixel sub-area, the detection sub-area is adjacent to the pixel sub-area, the first sub-pixel is located in the detection sub-area, the second sub-pixel is located in the pixel sub-area, a light emitting color of the first sub-pixel is the same as a light emitting color of the second sub-pixel, the control chip collects a first signal value of a first electrical signal of the first sub-pixel when the first sub-pixel and the second sub-pixel operate, and outputs a control instruction when the first signal value is outside a reference range, the control instruction is used to adjust a second signal value of a second electrical signal of the second sub-pixel and the first signal value to the reference range, and the first signal value is positively correlated to the light emitting luminance of the first sub-pixel, the second signal value is positively correlated to the light emitting luminance of the second sub-pixel, or the first signal value is negatively correlated to the light emitting luminance of the first sub-pixel, and the second signal value is negatively correlated to the light emitting luminance of the second sub-pixel, so that whether an abnormal luminance display area exists can be detected, and the abnormal luminance display area can be compensated.
The display substrate provided by the embodiment of the present invention is briefly described above, and the display substrate provided by the embodiment of the present invention is described in detail below.
The embodiment of the invention also provides a display substrate. As shown in fig. 1, the display substrate includes: a display region 11, a first pixel unit (not shown), a second pixel unit (not shown), a control chip (not shown), and a driving chip (not shown).
In the present embodiment, as shown in fig. 1, the display area 11 includes a detection sub-area 111 and a pixel sub-area 112; the detection sub-region 111 is adjacent to the pixel sub-region 112. The detection sub-area 111 is located at an edge of the display area 11, for example, at a corner, a straight edge of the display area 11.
In the present embodiment, the pixel sub-area 112 may be an area other than the detection sub-area 111 in the display area 11.
In the present embodiment, the first pixel unit is located in the detection sub-region 111. As shown in fig. 2, the first pixel unit 21 includes a first sub-pixel R1, a first sub-pixel G1 and a first sub-pixel B1, wherein the light emitting color of the first sub-pixel R1 is red, the light emitting color of the first sub-pixel G1 is green, and the light emitting color of the first sub-pixel B1 is blue. The first pixel cell 21 is located between the encapsulation layer 26 and the substrate 25.
In the present embodiment, as shown in fig. 2, the first pixel circuit 23 is located on the substrate 25. The first pixel circuit 23 includes a pixel driving circuit Dr1, a pixel driving circuit Dg1 and a pixel driving circuit Db1, the pixel driving circuit Dr1 is electrically connected to the first sub-pixel R1, the pixel driving circuit Dg1 is electrically connected to the first sub-pixel G1, and the pixel driving circuit Db1 is electrically connected to the first sub-pixel B1. The pixel driving circuit Dr1 is located between the first sub-pixel R1 and the substrate 25, the pixel driving circuit Dg1 is located between the first sub-pixel G1 and the substrate 25, and the pixel driving circuit Db1 is located between the first sub-pixel B1 and the substrate 25.
In this embodiment, the driving method of the first sub-pixel R1, the driving method of the first sub-pixel G1 and the driving method of the first sub-pixel B1 are all active driving. Of course, in other embodiments, the driving manner of the first sub-pixel R1, the driving manner of the first sub-pixel G1, and the driving manner of the first sub-pixel B1 may all be passive driving.
In the present embodiment, the first sub-pixel R1, the first sub-pixel G1 and the first sub-pixel B1 are all OLED pixels. Moreover, the first sub-pixel R1, the first sub-pixel G1 and the first sub-pixel B1 are all powered by a constant voltage power supply.
In the present embodiment, the second pixel unit is located in the pixel sub-region 112. As shown in fig. 2, the second pixel unit 22 includes a second sub-pixel R2, a second sub-pixel G2 and a second sub-pixel B2, wherein the light emitting color of the second sub-pixel R2 is red, the light emitting color of the second sub-pixel G2 is green, and the light emitting color of the second sub-pixel B2 is blue. The second pixel cell 22 is located between the encapsulation layer 26 and the substrate 25.
In the present embodiment, as shown in fig. 2, the second pixel circuit 24 is located on the substrate 25. The second pixel circuit 24 includes a pixel driving circuit Dr2, a pixel driving circuit Dg2 and a pixel driving circuit Db2, the pixel driving circuit Dr2 is electrically connected to the second sub-pixel R2, the pixel driving circuit Dg2 is electrically connected to the second sub-pixel G2, and the pixel driving circuit Db2 is electrically connected to the second sub-pixel B2. The pixel driving circuit Dr2 is located between the second sub-pixel R2 and the substrate 25, the pixel driving circuit Dg2 is located between the second sub-pixel G2 and the substrate 25, and the pixel driving circuit Db2 is located between the second sub-pixel B2 and the substrate 25.
In this embodiment, the driving manner of the second sub-pixel R2, the driving manner of the second sub-pixel G2 and the driving manner of the second sub-pixel B2 are all active driving.
In the present embodiment, the second sub-pixel R2, the second sub-pixel G2 and the second sub-pixel B2 are all OLED pixels. Moreover, the second sub-pixel R2, the second sub-pixel G2 and the second sub-pixel B2 are all powered by a constant voltage power supply.
In the present embodiment, the driving chip is located below the display area 11, but is not limited thereto.
In this embodiment, for the first subpixel R1 and the second subpixel R2, when the first subpixel R1 and the second subpixel R2 operate, the control chip acquires a first signal value of a first electrical signal of the first subpixel R1 for each first subpixel R1 in the detection sub-region 111, and outputs a control instruction when the first signal value of the first subpixel R1 is outside a reference range, where the control instruction is used to control the driving chip to adjust a second signal value of a second electrical signal of the second subpixel R2 and the first signal value of the first electrical signal of the first subpixel R1 to be within the reference range.
In this embodiment, the type of the second electrical signal and the type of the first electrical signal are both current signals, that is, the first electrical signal of the first sub-pixel R1 is the driving current of the first sub-pixel R1, the second electrical signal of the second sub-pixel R2 is the driving current of the second sub-pixel R2, the first signal value of the first sub-pixel R1 and the second signal value of the second sub-pixel R2 are both current values, and the first signal value of the second sub-pixel R2 is positively correlated with the light emission luminance of the first sub-pixel R1, that is, the larger the first signal value of the first sub-pixel R1 is, the larger the light emission luminance of the first sub-pixel R1 is, and the second signal value of the second sub-pixel R2 is positively correlated with the light emission luminance of the second sub-pixel R2, that is, the larger the second signal value of the second sub-pixel R2 is, the larger the light emission luminance of the second sub-pixel R2 is.
In the present embodiment, the reference range is a current value reference range. The minimum value of the reference range is the minimum gray-scale current of the first sub-pixel R1 at room temperature, and the maximum value of the reference range is the maximum gray-scale current of the first sub-pixel R1 at room temperature. Of course, the minimum and maximum values of the reference range are not limited to the values described above.
In this embodiment, it may be detected whether the first signal value of the first sub-pixel R1 in the detection sub-region 111 is within the reference range, and when the first signal value of the first sub-pixel R1 is outside the reference range, the second signal value of the second electrical signal of the second sub-pixel R2 and the first signal value of the first electrical signal of the first sub-pixel R1 are adjusted to be within the reference range. When the second signal value of the second electrical signal of the second sub-pixel R2 in the pixel sub-region 112 is adjusted to be within the reference range, the second signal value of the second electrical signal of the second sub-pixel R2 having a different distance from the detection sub-region 111 may be adjusted to be within the reference range in a time-sharing manner. For example, the second signal value of the second electrical signal of the second sub-pixel R2 close to the detection sub-region 111 may be adjusted to be within the reference range, and then the second signal value of the second electrical signal of the second sub-pixel R2 far from the detection sub-region 111 may be adjusted to be within the reference range.
Similarly, in this embodiment, for the first sub-pixel G1 and the second sub-pixel G2, when the first sub-pixel G1 and the second sub-pixel G2 operate, the control chip acquires a first signal value of the first electrical signal of the first sub-pixel G1 for each first sub-pixel G1 in the detection sub-region 111, and outputs a control instruction when the first signal value is outside the reference range, where the control instruction is used to control the driving chip to adjust the second signal value of the second electrical signal of the second sub-pixel G2 and the first signal value of the first electrical signal of the first sub-pixel G1 to be within the reference range.
In this embodiment, the first electrical signal of the first sub-pixel G1 is a driving current of the first sub-pixel R1, the second electrical signal of the second sub-pixel G2 is a driving current of the second sub-pixel R2, both the first signal value and the second signal value are current values, the first signal value of the first sub-pixel G1 is positively correlated with the light emission luminance of the first sub-pixel G1, that is, the greater the first signal value of the first sub-pixel G1, the greater the light emission luminance of the first sub-pixel G1, the positively correlated the second signal value of the second sub-pixel G2 with the light emission luminance of the second sub-pixel G2, that is, the greater the second signal value of the second sub-pixel G2, the greater the light emission luminance of the second sub-pixel G2.
In the present embodiment, the reference range is a current value reference range. The minimum value of the reference range is the minimum gray-scale current of the first sub-pixel G1 at room temperature, and the maximum value of the reference range is the maximum gray-scale current of the first sub-pixel G1 at room temperature. Of course, the minimum and maximum values of the reference range are not limited to the values described above.
In this embodiment, it may be detected whether the first signal value of the first sub-pixel G1 in the detection sub-region 111 is within the reference range, and when the first signal value of the first sub-pixel G1 is outside the reference range, the second signal value of the second electrical signal of the second sub-pixel G2 and the first signal value of the first electrical signal of the first sub-pixel G1 are adjusted to be within the reference range. When the second signal value of the second electrical signal of the second sub-pixel G2 in the pixel sub-region 112 is adjusted to be within the reference range, the second signal value of the second electrical signal of the second sub-pixel G2 having a different distance from the detection sub-region 111 may be adjusted to be within the reference range in a time-sharing manner. For example, the second signal value of the second electrical signal of the second sub-pixel G2 close to the detection sub-region 111 may be adjusted to be within the reference range, and then the second signal value of the second electrical signal of the second sub-pixel G2 far from the detection sub-region 111 may be adjusted to be within the reference range.
Similarly, in the embodiment, for the first subpixel B1 and the second subpixel B2, when the first subpixel B1 and the second subpixel B2 operate, for each first subpixel B1 in the detection sub-region 111, the control chip acquires a first signal value of a first electrical signal of the first subpixel B1, and when the first signal value of the first subpixel B1 is located outside the reference range, outputs a control instruction, where the control instruction is used to control the driving chip to adjust a second signal value of a second electrical signal of the second subpixel B2 and the first signal value of the first electrical signal of the first subpixel B1 to be within the reference range.
In this embodiment, the first electrical signal of the first sub-pixel B1 is the driving current of the first sub-pixel B1, the second electrical signal of the second sub-pixel B2 is the driving current of the second sub-pixel B2, both the first signal value and the second signal value are current values, the first signal value of the first sub-pixel B1 is positively correlated with the light emission luminance of the first sub-pixel B1, that is, the greater the first signal value of the first sub-pixel B1 is, the greater the light emission luminance of the first sub-pixel B1 is, the positively correlated the second signal value of the second sub-pixel B2 with the light emission luminance of the second sub-pixel B2 is, that is, the greater the second signal value of the second sub-pixel B2 is, the greater the light emission luminance of the second sub-pixel B2 is.
In the present embodiment, the reference range is a current value reference range. The minimum value of the reference range is the minimum gray-scale current of the first sub-pixel B1 at room temperature, and the maximum value of the reference range is the maximum gray-scale current of the first sub-pixel B1 at room temperature. Of course, the minimum and maximum values of the reference range are not limited to the values described above.
In this embodiment, it may be detected whether the first signal value of the first sub-pixel B1 in the detection sub-region 111 is within the reference range, and when the first signal value of the first sub-pixel B1 is outside the reference range, the second signal value of the second electrical signal of the second sub-pixel B2 and the first signal value of the first electrical signal of the first sub-pixel B1 are adjusted to be within the reference range. When the second signal value of the second electrical signal of the second sub-pixel B2 in the pixel sub-area 112 is adjusted to be within the reference range, the second signal value of the second electrical signal of the second sub-pixel B2 having a different distance from the detection sub-area 111 may be adjusted to be within the reference range in a time-sharing manner. For example, the second signal value of the second electrical signal of the second sub-pixel B2 close to the detection sub-region 111 may be adjusted to be within the reference range, and then the second signal value of the second electrical signal of the second sub-pixel B2 far from the detection sub-region 111 may be adjusted to be within the reference range.
In this embodiment, whether display brightness abnormality exists or not can be determined by detecting the first signal value of the first electrical signal of the first sub-pixel through the detection sub-region, and when the display brightness abnormality exists, the display brightness of the display region can be adjusted to perform brightness compensation, so that the display brightness abnormality can be reduced, and the phenomena of uneven picture brightness, occurrence of dark spots or bright spots and the like caused by different brightness attenuation differences of different sub-pixels when the display substrate displays for a long time are avoided.
It should be noted that, in this embodiment, the first subpixel R1, the first subpixel G1, and the first subpixel B1 are all powered by a constant voltage power supply, the second subpixel R2, the second subpixel G2, and the second subpixel B2 are all powered by a constant voltage power supply, the type of the second electrical signal and the type of the first electrical signal are both current signals, the first signal value and the second signal value are both current values, the reference range is a current value reference range, the first signal value is positively correlated with the light emission luminance of the first subpixel, the second signal value is positively correlated with the light emission luminance of the second subpixel as an example, in an actual implementation, the first subpixel R1, the first subpixel G1, and the first subpixel B1 are all powered by a constant current power supply, the second subpixel R2, the second subpixel G2, and the second subpixel B2 are all powered by a constant current power supply, the type of the second electrical signal and the type of the first electrical signal may be both voltage signals, the first signal value and the second signal value are both voltage values, the reference range is a minimum value of the first electrical signal, and the second signal is a minimum value of the first electrical signal under a condition of the room temperature reference condition.
In this embodiment, the display substrate includes a display area, a first sub-pixel, a second sub-pixel and a control chip, the display area includes a detection sub-area and a pixel sub-area, the detection sub-area is adjacent to the pixel sub-area, the first sub-pixel is located in the detection sub-area, the second sub-pixel is located in the pixel sub-area, the light emitting color of the first sub-pixel is the same as the light emitting color of the second sub-pixel, the control chip collects a first signal value of a first electrical signal of the first sub-pixel when the first sub-pixel and the second sub-pixel operate, and outputs a control instruction when the first signal value is located outside a reference range, the control instruction is used to adjust a second signal value of a second electrical signal of the second sub-pixel and the first signal value to within the reference range, and the first signal value is positively correlated to the light emitting luminance of the first sub-pixel, the second signal value is positively correlated to the light emitting luminance of the second sub-pixel, or the first signal value is negatively correlated to the light emitting luminance of the second sub-pixel, so that whether an abnormal luminance display can be detected, and the abnormal luminance display can be performed.
The embodiment of the invention also provides a display substrate. As shown in fig. 3, in the present embodiment, different from the above embodiments, the display area 11 includes a detection sub-area 111, a pixel sub-area 112 and a central display sub-area 113; the detection sub-region 111 is adjacent to the pixel sub-region 112. The detection sub-area 111 is located at the edge of the display area 11, and the pixel sub-area 112 is located at the edge of the display area 11. The distance between the central display sub-region 113 and the detection sub-region 111 is greater than the distance between the pixel sub-region 112 and the detection sub-region 111.
In the present embodiment, the driving chip is located below the display area 11, and the projection of the driving chip on the display substrate partially overlaps or completely overlaps with the detection sub-area 111. The driving chip generates heat during operation, which may cause the temperature of the detection sub-region 111 and the pixel sub-region 112 to increase. The first sub-pixel R1, the first sub-pixel G1 and the first sub-pixel B1 in the detection sub-region 111, and the second sub-pixel R2, the second sub-pixel G2 and the second sub-pixel B2 in the pixel sub-region 112 may have a luminance higher than a predetermined luminance due to a temperature rise, and a white balance point may move due to a variation of luminance of sub-pixels of different colors with a temperature amplitude being inconsistent, thereby causing a color shift phenomenon.
Fig. 4 is a schematic diagram showing the relationship between current and temperature under the same voltage for the red emitting sub-pixel R, the green emitting sub-pixel G, and the blue emitting sub-pixel B. As shown in fig. 4, the current of the sub-pixels with different colors varies with the temperature, i.e. the luminance of the sub-pixels with different colors varies with the temperature, resulting in color shift. As can be seen from fig. 4, at a temperature of 20 c and above, the current and temperature of the sub-pixels R, G, and B are almost linearly related. After a large number of tests and fitting data results, the one-to-one correspondence between current and temperature can be found. Therefore, the purpose of accurately testing the temperature can be achieved according to the one-to-one correspondence relationship between the current and the temperature and the collected current of the sub-pixels.
In this embodiment, it may be detected whether the first signal value of the first sub-pixel R1 in the detection sub-region 111 is within the reference range, and when the first signal value of the first sub-pixel R1 is outside the reference range, the second signal value of the second electrical signal of the second sub-pixel R2 and the first signal value of the first electrical signal of the first sub-pixel R1 in the pixel sub-region 112 are adjusted to be within the reference range.
In this embodiment, it may be detected whether the first signal value of the first sub-pixel G1 in the detection sub-region 111 is within the reference range, and when the first signal value of the first sub-pixel G1 is outside the reference range, the second signal value of the second electrical signal of the second sub-pixel G2 and the first signal value of the first electrical signal of the first sub-pixel G1 in the pixel sub-region 112 are adjusted to be within the reference range.
In this embodiment, it may be detected whether the first signal value of the first sub-pixel B1 in the detection sub-region 111 is within the reference range, and when the first signal value of the first sub-pixel B1 is outside the reference range, the second signal value of the second electrical signal of the second sub-pixel B2 and the first signal value of the first electrical signal of the first sub-pixel B1 in the pixel sub-region 112 are adjusted to be within the reference range.
In this embodiment, whether display brightness abnormality exists or not may be determined by detecting a first signal value of a first electrical signal of a first sub-pixel by a detection sub-region, and when it is detected that display brightness abnormality exists, the display brightness of a local display region close to the detection sub-region may be adjusted to perform brightness compensation, so that a white balance point is stabilized within an acceptable range, and thus display brightness abnormality may be reduced, and a color cast phenomenon may be reduced.
In the present embodiment, the pixel sub-area 112 is located at the straight edge of the display area 11, and in practical implementation, when the detection sub-area 111 is located only at the corner of the display area 11, the pixel sub-area 112 may also be located at the corner of the display area 11.
The embodiment of the invention also provides a display substrate. In the present embodiment, different from the above embodiments, the driving method of the first sub-pixel R1, the driving method of the first sub-pixel G1, and the driving method of the first sub-pixel B1 are all driven passively. The pixel driving circuit Dr1, the pixel driving circuit Dg1 and the pixel driving circuit Db1 each include only one electronic switch, for example, the electronic switch is a thin film transistor. The light transmittance of the detection sub-region 111 is greater than that of the pixel sub-region 112.
As shown in fig. 5, in the embodiment, the display substrate further includes a fingerprint identification area 114, the fingerprint identification area 114 is located in the sub-detection area 112, and a fingerprint identification component may be disposed below the fingerprint identification area 114 to implement the under-screen fingerprint identification. Since the light transmittance of the detection sub-region 111 is high, the accuracy of fingerprint identification can be improved.
The embodiment of the invention also provides a display substrate. In the present embodiment, different from the above embodiments, as shown in fig. 6, the detection sub-region 111 is located at the edge of the display region 11 and surrounds the pixel sub-region 112.
In this embodiment, whether the average value of the first signal value of the first subpixel R1 in the detection sub-region 111 is within the reference range may be detected in real time, and when the average value of the first signal value of the first subpixel R1 is outside the reference range, the second signal value of the second electrical signal of the second subpixel R2 and the first signal value of the first electrical signal of the first subpixel R1 are adjusted to be within the reference range. When the average value of the first signal value of the first subpixel R1 is within the reference range, it continues to be detected whether the average value of the first signal value of the first subpixel R1 in the detection sub-region 111 is within the reference range.
In this embodiment, whether the average value of the first signal values of the first sub-pixel G1 in the detection sub-region 111 is within the reference range may be detected in real time, and when the average value of the first signal values of the first sub-pixel G1 is outside the reference range, the second signal value of the second electrical signal of the second sub-pixel G2 and the first signal value of the first electrical signal of the first sub-pixel G1 are adjusted to be within the reference range. When the average value of the first signal value of the first subpixel G1 is within the reference range, it continues to detect whether the average value of the first signal value of the first subpixel G1 in the detection sub-region 111 is within the reference range.
In this embodiment, it may be detected in real time whether the average value of the first signal value of the first sub-pixel B1 in the detection sub-region 111 is within the reference range, and when the average value of the first signal value of the first sub-pixel B1 is outside the reference range, the second signal value of the second electrical signal of the second sub-pixel B2 and the first signal value of the first electrical signal of the first sub-pixel B1 are adjusted to be within the reference range. When the average value of the first signal value of the first subpixel B1 is within the reference range, it continues to be detected whether the average value of the first signal value of the first subpixel B1 in the detection sub-region 111 is within the reference range.
The embodiment of the invention also provides a display device. As shown in fig. 7, the display device includes a display module and further includes the display substrate 1 according to any of the embodiments.
As shown in fig. 7, in the present embodiment, the display device further includes a fingerprint identification component 21, the fingerprint identification component 21 is located on a side of the substrate 25 away from the first pixel circuit 23, and a projection of the fingerprint identification component 21 on the display substrate 1 is located in the fingerprint identification area 114.
In this embodiment, the display substrate includes a display area, a first sub-pixel, a second sub-pixel, and a control chip, the display area includes a detection sub-area and a pixel sub-area, the detection sub-area is adjacent to the pixel sub-area, the first sub-pixel is located in the detection sub-area, the second sub-pixel is located in the pixel sub-area, a light emitting color of the first sub-pixel is the same as a light emitting color of the second sub-pixel, the control chip collects a first signal value of a first electrical signal of the first sub-pixel when the first sub-pixel and the second sub-pixel operate, and outputs a control instruction when the first signal value is outside a reference range, the control instruction is used to adjust a second signal value of a second electrical signal of the second sub-pixel and the first signal value to the reference range, and the first signal value is positively correlated to the light emitting luminance of the first sub-pixel, the second signal value is positively correlated to the light emitting luminance of the second sub-pixel, or the first signal value is negatively correlated to the light emitting luminance of the first sub-pixel, and the second signal value is negatively correlated to the light emitting luminance of the second sub-pixel, so that whether an abnormal luminance display area exists can be detected, and the abnormal luminance display area can be compensated.
The embodiment of the invention also provides a control method of the display substrate, which is used for controlling the display substrate in any embodiment. As shown in fig. 8, the method for controlling a display substrate includes steps 801 to 802 of:
in step 801, a first signal value of a first electrical signal of a first sub-pixel is acquired when the first sub-pixel and a second sub-pixel are operated.
In step 802, when the first signal value is outside the reference range, a second signal value of a second electrical signal of the second sub-pixel and the first signal value are adjusted to be within the reference range, and the type of the second electrical signal is the same as the type of the first electrical signal.
In this embodiment, the display substrate includes a display area, a first sub-pixel, a second sub-pixel and a control chip, the display area includes a detection sub-area and a pixel sub-area, the detection sub-area is adjacent to the pixel sub-area, the first sub-pixel is located in the detection sub-area, the second sub-pixel is located in the pixel sub-area, the light emitting color of the first sub-pixel is the same as the light emitting color of the second sub-pixel, the control chip collects a first signal value of a first electrical signal of the first sub-pixel when the first sub-pixel and the second sub-pixel operate, and outputs a control instruction when the first signal value is located outside a reference range, the control instruction is used to adjust a second signal value of a second electrical signal of the second sub-pixel and the first signal value to within the reference range, and the first signal value is positively correlated to the light emitting luminance of the first sub-pixel, the second signal value is positively correlated to the light emitting luminance of the second sub-pixel, or the first signal value is negatively correlated to the light emitting luminance of the second sub-pixel, so that whether an abnormal luminance display can be detected, and the abnormal luminance display can be performed.
The display device in this embodiment may be: any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator and the like.
It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intermediate layer or element may also be present. Like reference numerals refer to like elements throughout.
In the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (12)
1. A display substrate is characterized by comprising a display area, a first sub-pixel, a second sub-pixel and a control chip; the display area comprises a detection sub-area and a pixel sub-area; the detection sub-region is adjacent to the pixel sub-region; the first sub-pixel is positioned in the detection sub-area, the second sub-pixel is positioned in the pixel sub-area, and the light-emitting color of the first sub-pixel is the same as that of the second sub-pixel;
the control chip is used for acquiring a first signal value of a first electric signal of the first sub-pixel when the first sub-pixel and the second sub-pixel work, and outputting a control instruction when the first signal value is out of a reference range, wherein the control instruction is used for adjusting a second signal value of a second electric signal of the second sub-pixel and the first signal value to be within the reference range, and the type of the second electric signal is the same as the type of the first electric signal;
the first signal value is positively correlated with the light-emitting brightness of the first sub-pixel, and the second signal value is positively correlated with the light-emitting brightness of the second sub-pixel, or the first signal value is negatively correlated with the light-emitting brightness of the first sub-pixel, and the second signal value is negatively correlated with the light-emitting brightness of the second sub-pixel.
2. The display substrate according to claim 1, wherein the type of the second electrical signal and the type of the first electrical signal are both current signals, the first signal value and the second signal value are both current values, the reference range is a current value reference range, the first signal value is positively correlated with the light emission luminance of the first sub-pixel, and the second signal value is positively correlated with the light emission luminance of the second sub-pixel; alternatively, the first and second electrodes may be,
the type of the second electrical signal and the type of the first electrical signal are both voltage signals, the first signal value and the second signal value are both voltage values, the reference range is a voltage value reference range, the first signal value is negatively correlated with the light-emitting brightness of the first sub-pixel, and the second signal value is negatively correlated with the light-emitting brightness of the second sub-pixel.
3. The display substrate according to claim 2, wherein when the type of the second electrical signal and the type of the first electrical signal are both current signals, the minimum value of the reference range is a minimum gray-scale current of the first sub-pixel at room temperature, and the maximum value of the reference range is a maximum gray-scale current of the first sub-pixel at room temperature;
when the type of the second electrical signal and the type of the first electrical signal are both voltage signals, the minimum value of the reference range is the minimum gray scale voltage of the first sub-pixel under the room temperature condition, and the maximum value of the reference range is the maximum gray scale voltage of the first sub-pixel under the room temperature condition.
4. The display substrate of claim 1, further comprising: the pixel circuit comprises a substrate, a first pixel circuit and a second pixel circuit;
the first pixel circuit and the second pixel circuit are positioned on the substrate, the first sub-pixel is positioned on one side of the first pixel circuit, which is far away from the substrate, and the first pixel circuit is electrically connected with the first sub-pixel; the second sub-pixel is positioned on one side of the second pixel circuit far away from the substrate, and the second pixel circuit is electrically connected with the second sub-pixel;
the driving mode of the first sub-pixel is a passive mode; the first pixel circuit comprises only one electronic switch; the driving mode of the second sub-pixel is an active mode.
5. The display substrate of claim 4, wherein the light transmittance of the detector sub-region is greater than the light transmittance of the pixel sub-region; the display substrate further comprises a fingerprint identification area, and the fingerprint identification area is located in the detection sub-area.
6. The display substrate of claim 1, further comprising a driving chip, wherein a projection of the driving chip on the display substrate at least partially overlaps the detection sub-region.
7. The display substrate of claim 1, wherein the sub-detection area is located at an edge of the display area, and/or wherein the sub-pixel area is located at an edge of the display area.
8. The display substrate of claim 1, wherein the detection sub-region is located at a corner of the display region, and/or wherein the pixel sub-region is located at a corner of the display region.
9. The display substrate of claim 1, wherein the detection sub-region is located at an edge of the display region and surrounds the pixel sub-region.
10. A display device, comprising: the display substrate of any one of claims 1 to 9.
11. The display device according to claim 10, wherein the display substrate further comprises a substrate, a first pixel circuit and a second pixel circuit, the first pixel circuit and the second pixel circuit are located on the substrate, the light transmittance of the detection sub-region is greater than that of the pixel sub-region, the display substrate further comprises a fingerprint identification region, the fingerprint identification region is located in the detection sub-region, the display device further comprises a fingerprint identification component, the fingerprint identification component is located on a side of the substrate away from the first pixel circuit, and a projection of the fingerprint identification component on the display substrate is located in the fingerprint identification region.
12. The control method of the display substrate is characterized in that the display substrate comprises a display area, a first sub-pixel and a second sub-pixel; the display area comprises a detection sub-area and a pixel sub-area; the detection sub-region is adjacent to the pixel sub-region; the first sub-pixel is positioned in the detection sub-area, the second sub-pixel is positioned in the pixel sub-area, and the light-emitting color of the first sub-pixel is the same as that of the second sub-pixel; the method comprises the following steps:
acquiring a first signal value of a first electric signal of the first sub-pixel when the first sub-pixel and the second sub-pixel work;
when the first signal value is out of a reference range, adjusting a second signal value of a second electric signal of the second sub-pixel and the first signal value to be in the reference range, wherein the type of the second electric signal is the same as that of the first electric signal; the first signal value is positively correlated with the light-emitting brightness of the first sub-pixel, and the second signal value is positively correlated with the light-emitting brightness of the second sub-pixel, or the first signal value is negatively correlated with the light-emitting brightness of the first sub-pixel, and the second signal value is negatively correlated with the light-emitting brightness of the second sub-pixel.
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