CN111179754A - Display substrate, display device and brightness compensation method - Google Patents
Display substrate, display device and brightness compensation method Download PDFInfo
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- CN111179754A CN111179754A CN202010002625.7A CN202010002625A CN111179754A CN 111179754 A CN111179754 A CN 111179754A CN 202010002625 A CN202010002625 A CN 202010002625A CN 111179754 A CN111179754 A CN 111179754A
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Abstract
The invention provides a display substrate, a display device and a brightness compensation method, wherein the display substrate comprises a flexible substrate, pixel islands and island bridges, the pixel islands are positioned on the flexible substrate and connected through the island bridges, one or more pixel units are arranged on each pixel island, a groove is arranged in the area outside each pixel island, the depth direction of the groove extends along the thickness direction of the flexible substrate, and a sensor for detecting the width of the groove is also arranged on the display substrate so as to compensate the brightness of the pixel units according to the width of the groove. According to the invention, the groove is arranged in the region outside the pixel island of the display substrate, and the sensor for detecting the width of the groove can detect the width of the groove.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display substrate, a display device and a brightness compensation method.
Background
With the development of display technology, flexible display technology is gradually mature. A flexible display device is a stretchable display device, which can be stretched or compressed within a certain range, however, when the flexible display device is deformed, the area of a display region changes, for example, the area may increase or decrease, when the area of the display region changes, the luminance per unit area also changes, for example, when the luminance of each pixel unit is not changed, and when the area of the display device is increased by stretching, the luminance per unit area of a display panel decreases, and the luminance change per unit area of the display panel may affect the display effect.
Disclosure of Invention
The embodiment of the invention provides a display substrate, a display device and a brightness compensation method, and aims to solve the problem that when a flexible display substrate deforms, the display effect is possibly influenced.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a display substrate, including a flexible substrate, and a pixel island and an island bridge located on the flexible substrate, where the pixel islands are connected by the island bridge, each pixel island is provided with one or more pixel units, a groove is formed in a region outside the pixel island, a depth direction of the groove extends along a thickness direction of the flexible substrate, and the display substrate is further provided with a sensor for detecting a width of the groove, so as to compensate brightness of the pixel units according to the width of the groove.
Optionally, a plurality of grooves are disposed around the island bridge connected to each of the pixel islands, a length direction of each groove extends in a direction parallel to the flexible substrate, and length directions of at least two of the plurality of grooves are located on two non-parallel straight lines.
Optionally, a plurality of first grooves whose extending directions are parallel to the first direction and a plurality of second grooves whose extending directions are parallel to the second direction are disposed on the island bridge surrounding each of the pixel islands, and the first direction and the second direction are directions parallel to the flexible substrate and perpendicular to each other.
Optionally, four pixel units are disposed on each pixel island, at least two first grooves and at least two second grooves are circumferentially distributed around each pixel island, lengths of at least two first grooves are not equal, and lengths of at least two second grooves are not equal.
Optionally, the sensor includes a capacitor disposed in the groove, and two poles of the capacitor are disposed on two opposite inner walls of the groove, respectively; and/or
The sensor is including setting up in displacement sensor in the recess, the sensor includes first end and second end, first end with the second end set up respectively in on two inner walls that the recess is relative.
Optionally, the width of the sensor in the direction perpendicular to the flexible substrate is not more than half of the height of the groove in the direction perpendicular to the flexible substrate;
the sensor is located the recess is close to display substrate's light-emitting side one side, perhaps the sensor is located the recess is kept away from display substrate's light-emitting side one side.
In a second aspect, an embodiment of the present invention provides a display device, including the display substrate described in any one of the above.
In a third aspect, an embodiment of the present invention provides a brightness compensation method applied to the display device described above, including the following steps:
detecting the width of the corresponding groove through the sensor;
determining a stretching area and a squeezing area of the display substrate according to the width of the groove;
and compensating the brightness of the display substrate according to the stretching state of the display substrate, wherein the brightness of the pixel unit in the stretching area is controlled to be increased, and the brightness of the pixel unit in the squeezing area is controlled to be reduced.
Optionally, the determining the stretching area and the pressing area of the display substrate according to the width of the groove includes:
determining a groove with a distance smaller than a preset distance threshold value from a target pixel unit as a target groove, wherein the target pixel unit is a pixel unit on the display substrate;
acquiring the width variation of each target groove;
determining the deformation amount of the area where the target pixel unit is located according to the width variation of each target groove and the distance between each target groove and the target pixel unit, and determining the stretching state of the area where the target pixel unit is located according to the deformation amount of the area where the target pixel unit is located, wherein the area where the deformation amount is larger than 0 is a stretching area, and the area where the deformation amount is smaller than 0 is an extrusion area.
Optionally, the compensating the brightness of the display substrate according to the stretching state of the display substrate includes:
determining a compensation proportion of the target pixel unit according to the deformation amount of the area where the target pixel unit is located and the distance between the target pixel unit and the target reference point, wherein the compensation proportion of the target pixel unit is reduced along with the increase of the distance between the target pixel unit and the groove;
and determining the compensation gray scale of the target pixel unit according to the determined compensation proportion so as to enable the brightness variation of the target pixel unit in a unit area to be smaller than a preset threshold value.
According to the embodiment of the invention, the groove is arranged in the region outside the pixel island of the display substrate, and the sensor for detecting the width of the groove can detect the width of the groove.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a display substrate according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a groove in one embodiment of the present invention;
FIG. 3 is yet another cross-sectional view of a groove in an embodiment of the present invention; FIG. 4 is a schematic view of another structure of a display substrate according to an embodiment of the present invention;
FIG. 5 is a flow chart of a brightness compensation method according to an embodiment of the present invention;
fig. 6 is a schematic view of another structure of the display substrate according to the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a display substrate.
As shown in fig. 1, in one embodiment, the display substrate includes a flexible substrate, pixel islands 110 and island bridges 120 on the flexible substrate.
The pixel islands 110 are connected through an island bridge 120, one or more pixel units 111 are disposed on each pixel island 110, in fig. 1, squares with different filling formats in one pixel unit 111 represent sub-pixels with different colors included in the pixel unit 111, and inter-island connecting lines may be further disposed on the island bridge 120 as needed, wherein the flexible substrate, the pixel islands 110, the island bridge 120, and the pixel units 111 disposed on the island bridge 120 may all refer to the related art, and no further limitation is made herein.
In this embodiment, a groove 130 is further formed in a region outside the pixel island 110, and a depth direction of the groove 130 extends along a thickness direction of the flexible substrate, which can also be understood as that the groove 130 extends from a position close to the display substrate to a direction away from the display substrate.
A sensor for detecting the width of the groove 130 is further disposed on the display substrate to compensate the brightness of the pixel unit 111 according to the width of the groove 130 detected by the sensor.
It should be understood that, for the display substrate, when deformation occurs due to external force, the deformation of the pixel island 110 is small and negligible, and the main deformation occurs at the island bridge 120, so in this embodiment, the groove 130 is disposed in the area outside the pixel island 110, so as to implement detection of the size of the display substrate by detecting the width of the groove 130.
When the display substrate deforms, the width of the groove 130 changes accordingly, and the larger the deformation of the display substrate is, the larger the width change of the groove 130 is, so that the deformation of the display substrate can be determined according to the width change of the groove 130.
After determining the deformation size of the display substrate, the pixel unit 111 on the display substrate may be further compensated.
It should be understood that if the luminance of each pixel unit 111 is not changed, when the display substrate is stretched and the area is increased, the luminous flux per unit area of the display substrate is reduced, that is, the luminance corresponding to the display substrate is reduced, and for an observer, the luminance of the display panel can be observed to be reduced; conversely, when the display substrate is compressed, the luminance of the display panel increases, and the viewer can observe an increase in the luminance of the display panel.
Accordingly, if the display substrate is in a stretched state, the brightness of the pixel unit 111 is increased, and if the display substrate is in a compressed state, the brightness of the pixel unit 111 is decreased, so that the illumination variation of the display substrate is reduced, the display effect of the display substrate is relatively stable, and the change of the display effect of the display substrate due to the deformation is reduced.
According to the embodiment of the invention, the groove 130 is arranged in the region outside the pixel island 110 of the display substrate, and the sensor for detecting the width of the groove 130 can detect the width of the groove 130, and the deformation of the display substrate occurs in the region outside the pixel island 110, so that the width of the groove 130 can reflect the deformation of the display substrate, and therefore, the pixel unit 111 can be compensated according to the widths of the grooves 130 at different positions in a targeted manner, which is beneficial to improving the compensation effect, and the display effect is improved.
Optionally, a plurality of grooves 130 are disposed around the island bridge 120 connected to each pixel island 110, so that deformation near each pixel island 110 can be detected, so as to compensate the pixel unit 111 on each pixel island 110 in a targeted manner, which is beneficial to improving the compensation effect.
The length direction of the grooves 130 extends in a direction parallel to the flexible substrate, and the length direction of at least two of the plurality of grooves 130 is located on two non-parallel straight lines.
It should be understood that each vector in the plane can be represented by two non-collinear vectors in the plane, and thus, in the present embodiment, the length directions of at least two grooves 130 are located on two non-parallel straight lines, and it can also be understood that the straight lines on which the length directions of at least two grooves 130 are located intersect.
Since each groove 130 can only reflect the deformation in the width direction, by providing at least two grooves 130 and intersecting the straight lines of the length directions of the two grooves 130, the corresponding deformation size and deformation direction can be determined according to the width change of the two grooves 130.
Meanwhile, since the structures of the respective regions of the display substrate are different, for example, the pixel islands 110 or the island bridges 120 may exist in the different regions, the deformation of the display substrate is not uniform, that is, the deformation amount of the respective positions of the display substrate is not uniform.
Therefore, in the embodiment, the plurality of grooves 130 are disposed around the island bridge 120 of the pixel island 110, so that the deformation magnitude near the pixel island 110 can be determined according to the distance relationship between the deformation amount of each groove 130 around the pixel island 110 and the pixel island 110, and thus, the compensation result can be determined in a targeted manner, which is beneficial to improving the compensation effect.
Optionally, in one embodiment, a plurality of first grooves extending in a direction parallel to the first direction and a plurality of second grooves extending in a direction parallel to the second direction are disposed on the island bridge 120 surrounding each pixel island 110, and the first direction and the second direction are directions parallel to the flexible substrate and perpendicular to each other.
The first grooves are exemplified as the transverse grooves 130 in fig. 4, i.e., the reference numerals 11-0, 11-1, 11-2, 22-0, 22-1, 22-2 and other grooves 130 parallel to the direction of these grooves 130, and the second grooves 130 are exemplified as the longitudinal grooves 130 in fig. 4, i.e., the reference numerals 12-0, 12-1, 12-2, 21-0, 21-1, 21-2 and other grooves 130 parallel to these grooves 130.
In this way, the longitudinal stretching or compressing amount of the display substrate can be determined through the width change of the first groove, the transverse stretching or compressing amount of the display substrate can be determined through the width change of the second groove, and then the deformation direction and size of the display substrate can be obtained through calculation.
Optionally, in another specific embodiment, four pixel units 111 are disposed on each pixel island 110, at least two first grooves and at least two second grooves are circumferentially distributed around each pixel island 110, lengths of at least two first grooves are not equal, and lengths of at least two second grooves are not equal.
As shown in fig. 1, in this embodiment, since the plurality of grooves 130 are disposed on the display substrate, and the plurality of grooves 130 are distributed around the pixel island 110, the grooves 130 can measure deformation amounts in various directions of the display substrate, thereby facilitating more accurate determination of the deformation size of the region corresponding to each pixel on the pixel island 110, and improving the accuracy of the compensation result.
In this embodiment, the purpose of providing a plurality of grooves 130 with different lengths along the same direction is to improve the accuracy of detecting the deformation of the pixel unit 111.
For example, as shown in fig. 1 and 4, in the present embodiment, four longer grooves 130 are included around each pixel island 110, two of which are first grooves and two of which are second grooves; further, eight relatively short grooves are included around each pixel island, and four of the eight relatively short grooves 130 are first grooves 130, and the other four are second grooves 130.
Optionally, the sensor includes a capacitor disposed in the groove 130, and two poles of the capacitor are respectively disposed on two opposite inner walls of the groove 130; and/or the sensor comprises a displacement sensor arranged in the groove 130, the sensor comprises a first end and a second end, and the first end and the second end are respectively arranged on two opposite inner walls of the groove 130.
In one embodiment, the selected sensor is a capacitor, and specifically, as shown in fig. 2 or fig. 3, two poles of the capacitor are respectively formed on two opposite inner walls of the groove 130, so that the capacitance of the capacitor is a constant value when other conditions are determined, and the capacitance decreases as the distance between the two electrodes increases and becomes larger as the distance between the two electrodes decreases. Therefore, the distance between the two inner walls of the groove 130 can be determined by detecting the capacitance value of the capacitor.
In another embodiment, the sensor is a displacement sensor, and specifically, for example, may be a photoelectric displacement sensor, one of the first end and the second end of which is a transmitting end, and the other of which is a receiving end, and by detecting the distance between the transmitting end and the receiving end, the detection of the width of the groove 130 can be realized.
Optionally, the width of the sensor in the direction perpendicular to the flexible substrate is no more than half the height of the groove 130 in the direction perpendicular to the flexible substrate; the sensor is located on one side of the light-emitting side of the groove 130 close to the display substrate, or the sensor is located on one side of the light-emitting side of the groove 130 far away from the display substrate.
As shown in fig. 3, as shown in fig. 2 and fig. 3, wherein fig. 2 is a cross-sectional view of the display substrate along a direction parallel to the flexible substrate, and fig. 3 is a cross-sectional view perpendicular to the flexible substrate, the groove 130 may be divided into two parts, namely, a side close to the light emitting side of the display unit and a side far away from the light emitting side of the display unit, which may also be referred to as a display surface and a non-display surface of the display unit, with a half of the depth of the groove 130 as a limit.
It should be noted that in the case of the display substrate being a bottom emission type display substrate, the light exit side (or display surface) of the display substrate is a side close to the flexible substrate, and in the case of the display substrate being a top emission type display substrate, the light exit side of the display substrate is a side far from the flexible substrate.
It should be understood that the flexible display panel may be deformed in a curled form, such that a side surface located at an outer side of the curl is stretched and a side surface located at an inner side of the curl is compressed, with a limit of about one-half of the depth of the groove 130.
Therefore, when the sensor detects that the width of the groove 130 on the light emitting side is increased, it indicates that the light emitting side of the display panel is in a stretched state, and if the sensor detects that the width of the side of the groove 130 away from the light emitting side is increased, it indicates that the light emitting side of the display panel is in a compressed state.
The invention also provides a display device comprising the display substrate.
The technical solution of this embodiment includes all the technical solutions of the above display substrate embodiment, so that at least all the technical effects can be achieved, and details are not described here.
The invention also provides a brightness compensation method which is applied to the display device.
As shown in fig. 5, in one embodiment, the brightness compensation method includes the steps of:
step 501: the width of the corresponding groove is detected by the sensor.
The sensor in this embodiment is used to detect the width of the groove, and therefore, when the shape of the display device changes, the sensor can detect the width of the groove.
Taking the sensor as an example of the capacitor in the above embodiment, the capacitance of the capacitor is inversely proportional to the distance between the plates, that is, under a certain other condition, the larger the plate distance is, the smaller the capacitor is, and the larger the distance is, so that under a condition that other conditions are not changed, if the capacitance of the capacitor is detected to be reduced, the width of the groove is increased, and if the capacitance of the capacitor is increased, the width of the groove is reduced.
Step 502: and determining a stretching area and a pressing area of the display substrate according to the width of the groove.
After determining the current width of the groove, it may be compared to the initial width of the groove to determine whether the display substrate is in an elongated state or a compressed state to determine the stretched and squeezed regions of the display substrate.
It should be understood that if the sensor is disposed on the side close to the display surface in the above-described embodiment of the display substrate, when the width of the groove is increased, the area where the groove is located is the stretching area of the display substrate, and if the width of the groove is decreased, the area where the groove is located is the pressing area of the display substrate; on the contrary, if the sensor is disposed on the side close to the non-display surface in the above embodiment of the display substrate, when the width of the groove is increased, the area where the groove is located is the extrusion area of the display substrate, and if the width of the groove is decreased, the area where the groove is located is the stretching area of the display substrate.
Step 503: and compensating the brightness of the display substrate according to the stretching state of the display substrate.
It should be understood that if the brightness of each pixel unit is not changed, when the display substrate is stretched and the area is increased, the luminous flux per unit area of the display substrate is reduced, that is, the luminance corresponding to the display substrate is reduced, whereas when the display substrate is compressed, the luminance of the display panel is increased.
Therefore, in this embodiment, the brightness of the pixel unit located in the stretching region is controlled to increase, and the brightness of the pixel unit located in the squeezing region is controlled to decrease. Therefore, when the display substrate is in a deformation state, the illumination variation corresponding to each position of the display panel is reduced, the brightness variation of the display panel observed by a user is small, and the display effect is relatively stable.
According to the embodiment of the invention, the groove is arranged in the region outside the pixel island of the display substrate, and the sensor for detecting the width of the groove can detect the width of the groove.
Optionally, the determining the stretching area and the pressing area of the display substrate according to the width of the groove includes:
determining a groove with a distance smaller than a preset distance threshold value from a target pixel unit as a target groove, wherein the target pixel unit is a pixel unit on the display substrate;
acquiring the width variation of each target groove;
determining the deformation amount of the area where the target pixel unit is located according to the width variation of each target groove and the distance between each target groove and the target pixel unit, and determining the stretching state of the area where the target pixel unit is located according to the deformation amount of the area where the target pixel unit is located, wherein the area where the deformation amount is larger than 0 is a stretching area, and the area where the deformation amount is smaller than 0 is an extrusion area.
It will be appreciated that if a groove is spaced a relatively large distance from a pixel element, then the distortion occurring in the vicinity of the groove has a relatively small correlation with the distortion occurring in the vicinity of the pixel element, and that the distortion at the groove is of reference to the distortion occurring in the vicinity of the pixel element only if the distance between the groove and the pixel element is relatively close.
Therefore, in the embodiment, the groove having a distance from the target pixel unit smaller than the preset threshold is selected as the target groove, so as to calculate the deformation amount of the target pixel unit according to the deformation amount of the target groove.
After the width variation of the target groove is obtained, the influence of the deformation generated at the target groove on the target pixel unit is determined according to the distance between the target groove and the target pixel unit.
Obviously, the smaller the distance between the target groove and the target pixel unit, the greater the influence of the deformation occurring at the target groove on the target pixel unit, and conversely, the greater the distance between the target groove and the target pixel unit, the smaller the influence of the deformation occurring at the target groove on the target pixel unit.
In one embodiment, when the deformation size at the pixel P13 is calculated, this is achieved by the following equation (1).
in the above formula,. DELTA.D13Referring to the magnitude of the deformation at pixel P13, a, b, c, and e are the respective weights of the deformation corresponding to the sensors in each of groove 11-0, groove 11-2, groove 21-0, and groove 21-2, and their values vary with the relative position to the groove, e.g., in this embodiment, the distance between groove 11-0 and pixel P13 is greater than the distance between groove 11-2 and pixel P13, and thus the coefficient a is less than the coefficient b.
It should be understood that, when the width of the groove 11-0 is deformed, the surrounding pixels P01, P02, P03, P04, P11, P12, P13 and P14 are all affected, when the groove 11-2 is deformed, the neighboring pixels P12 and P13 are greatly affected, and when the influence of the neighboring pixels P11 and P14 is less affected, the influence can be ignored for simplifying the operation.
In the formula d110Represents the detection result of the sensor at the groove 11-0, f (d)110) It represents the deformation amount of the groove determined according to the detection result of the sensor, and so on.
Since the extending directions of the grooves 11-0 and 11-2 are the same, the result calculated from the detection results of the sensors corresponding to the two grooves is the magnitude of the deformation of the target pixel unit in the longitudinal direction in the figure.
Similarly, the result calculated from the detection results of the sensors corresponding to the grooves 21-0 and 21-2 is the magnitude of deformation in the lateral direction in the drawing at the target pixel unit.
Further, the actual deformation size at the pixel P13 can be determined from the calculated longitudinal deformation size and the calculated transverse deformation size.
It should be understood that the sign ± in the formula (1) should be determined as "+" or "-" according to actual conditions, and the sign takes "+" when in the stretching state and "-" when in the squeezing state. That is, the region of the final calculation result where the amount of deformation is greater than 0 is a stretching region, and the region where the amount of deformation is less than 0 is an extrusion region.
Optionally, the compensating the brightness of the display substrate according to the stretching state of the display substrate includes:
determining a compensation proportion of the target pixel unit according to the deformation amount of the area where the target pixel unit is located and the distance between the target pixel unit and the target reference point, wherein the compensation proportion of the target pixel unit is reduced along with the increase of the distance between the target pixel unit and the groove;
and determining the compensation gray scale of the target pixel unit according to the determined compensation proportion so as to enable the brightness variation of the target pixel unit in a unit area to be smaller than a preset threshold value.
After the deformation size at the target pixel unit is determined through the above process, a compensation proportion for the target pixel unit is further determined according to the distance between the target pixel unit and the target reference point.
The purpose of compensating the target pixel unit is to make the brightness variation amount of each pixel unit in a unit area smaller than a preset threshold value, so that the average brightness of the display device has a small variation from the viewpoint of an observer.
In one embodiment, the compensation ratio for the target pixel cell is determined by, in particular, the following equation (2).
In one embodiment, as shown in fig. 6, with the center points of the four adjacent pixel islands, i.e., the center point of the groove 11-0, as the target reference point, the initial distance between the pixel P13 and the point a is D, and the value of D is a fixed value, the deformation rate occurring at the pixel P13 is proportional to the deformation rate occurring at the pixel P13
P13wherein the value of △ D is specifically the result of the calculation according to the above formula (1)13. Accordingly, the luminance variation image Δ L of the target pixel is L × δ, where L is the initial luminance of the target pixel.
Defining gamma coefficient of the display panel as gamma, the corresponding compensation result is Gafter＝(1+δ)1/γ*Gbefore. Wherein G isafterFor the final compensation result, GbeforeFor the pixel gray scale before compensation, GbeforeThe preceding factor is the determined compensation ratio.
In this way, the gray scales of the pixel units are compensated, so that the average brightness of the display units of the display panel is relatively stable, and the possible adverse effect on the display effect due to the deformation of the display substrate is reduced.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A display substrate is characterized by comprising a flexible substrate, pixel islands and island bridges, wherein the pixel islands are located on the flexible substrate and are connected through the island bridges, one or more pixel units are arranged on each pixel island, a groove is formed in the area outside each pixel island, the depth direction of the groove extends along the thickness direction of the flexible substrate, and a sensor for detecting the width of the groove is further arranged on the display substrate so as to compensate the brightness of the pixel units according to the width of the groove.
2. The display substrate according to claim 1, wherein a plurality of the grooves are provided around the island bridge connected to each of the pixel islands, a length direction of the grooves extends in a direction parallel to the flexible substrate, and a length direction of at least two of the plurality of the grooves is located on two non-parallel straight lines.
3. The display substrate according to claim 2, wherein a plurality of first grooves extending in a direction parallel to a first direction and a plurality of second grooves extending in a direction parallel to a second direction are disposed on the island bridge surrounding each of the pixel islands, and the first direction and the second direction are directions parallel to the flexible substrate and perpendicular to each other.
4. The display substrate according to claim 3, wherein four pixel units are disposed on each of the pixel islands, at least two first grooves and at least two second grooves are circumferentially distributed around each of the pixel islands, at least two of the first grooves have different lengths, and at least two of the second grooves have different lengths.
5. The display substrate according to any one of claims 1 to 4, wherein the sensor comprises a capacitor disposed in the groove, and two poles of the capacitor are disposed on two opposite inner walls of the groove, respectively; and/or
The sensor is including setting up in displacement sensor in the recess, the sensor includes first end and second end, first end with the second end set up respectively in on two inner walls that the recess is relative.
6. The display substrate of claim 5, wherein a width of the sensor in a direction perpendicular to the flexible substrate is no more than half a height of the groove in the direction perpendicular to the flexible substrate;
the sensor is located the recess is close to display substrate's light-emitting side one side, perhaps the sensor is located the recess is kept away from display substrate's light-emitting side one side.
7. A display device comprising the display substrate according to any one of claims 1 to 6.
8. A luminance compensation method applied to the display device according to claim 7, comprising the steps of:
detecting the width of the corresponding groove through the sensor;
determining a stretching area and a squeezing area of the display substrate according to the width of the groove;
and compensating the brightness of the display substrate according to the stretching state of the display substrate, wherein the brightness of the pixel unit in the stretching area is controlled to be increased, and the brightness of the pixel unit in the squeezing area is controlled to be reduced.
9. The brightness compensation method of claim 8, wherein the determining the stretching region and the pressing region of the display substrate according to the width of the groove comprises:
determining a groove with a distance smaller than a preset distance threshold value from a target pixel unit as a target groove, wherein the target pixel unit is a pixel unit on the display substrate;
acquiring the width variation of each target groove;
determining the deformation amount of the area where the target pixel unit is located according to the width variation of each target groove and the distance between each target groove and the target pixel unit, and determining the stretching state of the area where the target pixel unit is located according to the deformation amount of the area where the target pixel unit is located, wherein the area where the deformation amount is larger than 0 is a stretching area, and the area where the deformation amount is smaller than 0 is an extrusion area.
10. The luminance compensation method as claimed in claim 9, wherein the compensating the luminance of the display substrate according to the stretched state of the display substrate comprises:
determining a compensation proportion of the target pixel unit according to the deformation amount of the area where the target pixel unit is located and the distance between the target pixel unit and the target reference point, wherein the compensation proportion of the target pixel unit is reduced along with the increase of the distance between the target pixel unit and the groove;
and determining the compensation gray scale of the target pixel unit according to the determined compensation proportion so as to enable the brightness variation of the target pixel unit in a unit area to be smaller than a preset threshold value.
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