Display panel, detection method thereof and display device

Abstract

The embodiment of the invention provides a display panel and a detection method thereof, and the display panel comprises a sub-pixel unit which comprises a light-emitting sub-pixel and a light-sensing sub-pixel, the light-emitting sub-pixel is used for emitting light, and the light-sensing sub-pixel is used for obtaining light sensing information; the recognition unit is used for acquiring a biological recognition detection area, the biological recognition detection area comprises more than two sub-areas, and the sub-areas at least comprise light sensing sub-pixels; the acquisition unit is used for determining first light sensing information at a first moment and second light sensing information at a second moment of each sub-region according to the sensing light information; and the first stress calculation unit is used for determining first stress change information of the sub-region according to the first light sensing information and the second light sensing information of the sub-region. According to the display panel provided by the embodiment of the invention, the stress effect of the biological recognition detection area on the display panel can be obtained, so that the controller of the display device can conveniently realize multiple functions according to the stress effect, and the use performance of the display panel can be improved.

Description

Technical Field

[0001] This application relates to the technical field of display devices, and in particular, to a display panel, a detection method thereof, and a display device. Background Art

[0002] Flat panel display devices based on technologies such as Organic Light Emitting Diode (OLED) and Light Emitting Diode (LED) are widely used in various consumer electronic products such as mobile phones, televisions, laptop computers, and desktop computers due to their advantages of high picture quality, power saving, thin body, and wide application range, and have become the mainstream in display devices.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the Invention

[0004] Embodiments of this application provide a display panel, a detection method thereof, and a display device, aiming to improve the performance of the display panel.

[0005] An embodiment of the first aspect of this application provides a display panel, including: a sub-pixel unit, including a light-emitting sub-pixel and a photosensitive sub-pixel, the light-emitting sub-pixel is used for emitting light, and the photosensitive sub-pixel is used for obtaining induction light information; an identification unit, used for obtaining a biometric detection area, the biometric detection area includes two or more sub-areas, and the sub-areas at least include photosensitive sub-pixels; an acquisition unit, used for determining first photosensitive information at a first moment and second photosensitive information at a second moment of each sub-area according to the induction light information; a first stress calculation unit, used for determining first stress change information of the sub-area according to the first photosensitive information and the second photosensitive information of the sub-area.

[0006] An embodiment of the first aspect of this application provides a display panel, including: an identification unit, used for obtaining a biometric detection area, the biometric detection area includes two or more sub-areas; an acquisition unit, used for obtaining first induction information at a first moment and second induction information at a second moment of each sub-area; a first stress calculation unit, used for determining first stress change information of the sub-area according to the first induction information and the second induction information of each sub-area; a second stress calculation unit, used for determining second stress change information of the biometric detection area according to the first stress change information of two or more sub-areas.

[0007] An embodiment of the second aspect of this application further provides a stress detection method for a display panel. The display panel includes a sub-pixel unit, and the sub-pixel unit includes a light-emitting sub-pixel and a photosensitive sub-pixel. The light-emitting sub-pixel is used for emitting light, and the photosensitive sub-pixel is used for sensing light information. The stress detection method for the display panel includes:

[0008] Obtain a biometric detection area;

[0009] Divide the biometric detection area into two or more sub - areas, where the sub - areas at least include photosensitive sub - pixels;

[0010] Obtain the photosensitive information of the photosensitive sub - pixels in the sub - area, and determine the first photosensitive information at the first moment and the second photosensitive information at the second moment of each sub - area according to the photosensitive information;

[0011] Determine the first stress change information of the sub - area according to the first photosensitive information and the second photosensitive information of the sub - area.

[0012] An embodiment of the third aspect of the present application further provides a display device. The display device includes the display panel provided in any of the above - mentioned first - aspect embodiments, or the display device includes the display panel detected by using the stress detection method in any of the above - mentioned second - aspect embodiments.

[0013] In the display panel provided in the embodiment of the present application, the display panel includes a sub - pixel unit, an identification unit, and a first stress calculation unit. The light - emitting sub - pixels of the sub - pixel unit are used for emitting light to meet the light - emitting display requirements of the display panel, and the photosensitive sub - pixels can obtain the induced light information to meet the photosensitive requirements of the display panel. The identification unit can obtain the biometric detection area. According to the identification unit, the location and range of the biometric detection area can be determined. There are two or more sub - areas in the biometric detection area, and the sub - areas at least include photosensitive sub - pixels. The photosensitive sub - pixels in the sub - area can be used to obtain the photosensitive information of the sub - area. The acquisition unit can determine the first photosensitive information at the first moment and the second photosensitive information at the second moment of each sub - area according to the photosensitive information obtained by the photosensitive sub - pixels in the sub - area. The first stress calculation unit can determine the first stress change information according to the first photosensitive information and the second photosensitive information, that is, determine the first stress change information of the sub - area, and further determine the stress condition of the biometric detection area. Therefore, the display panel provided in the embodiment of the present application can not only achieve the display effect, but also obtain the stress effect of the biometric detection area on the display panel, which is convenient for the controller of the display device to implement various functions according to the stress effect and can improve the performance of the display panel. Description of the Drawings

[0014] By reading the following detailed description of non - restrictive embodiments with reference to the accompanying drawings, other features, objects, and advantages of the present application will become more obvious, where the same or similar reference numerals represent the same or similar features.

[0015] Figure 1 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

[0016] Figure 2 isFigure 1 Schematic diagram of a partially enlarged structure;

[0017] Figure 3 Schematic diagram of a display panel provided by an embodiment of the present application in a usage state;

[0018] Figure 4 Partial cross-sectional view of a display panel provided by an embodiment of the present application in a usage state;

[0019] Figure 5 Partial cross-sectional view of a display panel provided by another embodiment of the present application in a usage state;

[0020] Figure 6 Partial cross-sectional view of a display panel provided by yet another embodiment of the present application in a usage state;

[0021] Figure 7 Modular structure diagram of a display panel provided by an embodiment of the present application;

[0022] Figure 8 Schematic diagram of the structure of a biometric detection area of a display panel provided by an embodiment of the present application;

[0023] Figure 9 Schematic diagram of the structure of a biometric detection area of a display panel provided by another embodiment of the present application;

[0024] Figure 10 Schematic diagram of the structure of a biometric detection area of a display panel provided by still another embodiment of the present application;

[0025] Figure 11 Schematic diagram of the structure of a biometric detection area of a display panel provided by yet another embodiment of the present application;

[0026] Figures 12a to 13b Force analysis diagram of a display panel provided by an embodiment of the present application;

[0027] Figure 14 Light emission schematic diagram of a display panel provided by an embodiment of the present application;

[0028] Figure 15 Schematic diagram of the structure of a light filtering structure of a display panel provided by an embodiment of the present application;

[0029] Figure 16 [[ID=�3]]Force analysis diagram of a display panel provided by an embodiment of the present application in a usage state;

[0030] Figure 17 Force analysis waveform diagram of a display panel provided by an embodiment of the present application;

[0031] Figure 18 It is a waveform diagram of force analysis of a display panel provided by another embodiment of the present application;

[0032] Figure 19 It is a schematic flow chart of a stress detection method for a display panel provided by an embodiment of the present application;

[0033] Figure 20 It is a schematic flow chart of a stress detection method for a display panel provided by another embodiment of the present application.

[0034] Explanation of reference numerals:

[0035] 100, sub-pixel unit; 110, light-emitting sub-pixel; 111, red sub-pixel; 112, green sub-pixel; 113, blue sub-pixel; 114, pixel electrode; 115, light-emitting structure; 120, photosensitive sub-pixel; 121, photosensitive electrode; 122, photosensitive structure; 131, first carrier layer; 132, second carrier layer; 140, common electrode layer; 151, first encapsulation layer; 152, second encapsulation layer; 153, third encapsulation layer; 160, pixel definition layer; 161, pixel defining portion; 162, pixel opening; 170, light extraction layer;

[0036] 200, biometric detection area; 210, sub-area; 211, central sub-area; 212, first sub-area; 213, second sub-area; 201, peripheral area;

[0037] 300, light filtering structure; 310, first color filter unit; 320, second color filter unit; 330, third color filter unit;

[0038] 400, isolation structure;

[0039] 10, recognition unit; 20, acquisition unit; 30, first stress calculation unit; 40, second stress calculation unit;

[0040] X, first direction; Y, second direction; Z, third direction. Detailed implementation manners

[0041] Aspects and exemplary embodiments of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application. In the drawings and the following description, at least some of the well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present application; and, for clarity, the dimensions of some structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0042] In the description of the present application, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present application. In addition, terms such as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] The orientation terms appearing in the following description are all the directions shown in the figures and do not specifically limit the structure of the embodiments of the present application. In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "mounting" and "connecting" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0044] By integrating a light sensor on an organic light-emitting diode display device, fingerprint images, pulse wave data, etc. can be obtained, and a multifunctional organic light-emitting diode display device with biometric function and health sensor function can be realized. For the new application of integrating a health sensor on a display device, it is possible to infer mental states such as stress from the pulse wave and reflect the results in a game. In this case, in order to achieve a smooth transition between finger pulse wave measurement and game operation, how to operate game objects without moving the finger measuring the pulse wave away from the display device becomes a technical problem to be solved urgently. In addition, using the light sensor integrated in the display, the pulse wave is measured by photoplethysmography (PPG).

[0045] To better understand the present application, the following is combined with Figures 1 to 15A detailed description is given of the display panel and its detection method according to the embodiments of the present application.

[0046] As Figures 1 to 8 shown, an embodiment of the first aspect of the present application provides a display panel, including: a sub-pixel unit 100, including a light-emitting sub-pixel 110 and a photosensitive sub-pixel 120, the light-emitting sub-pixel 110 is used for emitting light, and the photosensitive sub-pixel 120 is used for acquiring sensed light information; an identification unit 10, used for acquiring a biometric detection area 200, the biometric detection area 200 includes two or more sub-areas 210, and the sub-area 210 at least includes a photosensitive sub-pixel 120; an acquisition unit 20, used for determining first photosensitive information at a first moment and second photosensitive information at a second moment of each sub-area 210 according to the sensed light information; a first stress calculation unit 30, used for determining first stress change information of the sub-area 210 according to the first photosensitive information and the second photosensitive information of the sub-area 210.

[0047] In the display panel provided by the embodiment of the present application, the display panel includes a sub-pixel unit 100, an identification unit 10, and a first stress calculation unit 30. The light-emitting sub-pixel 110 of the sub-pixel unit 100 is used for emitting light to meet the light-emitting display requirement of the display panel, and the photosensitive sub-pixel 120 can acquire sensed light information to meet the photosensitive requirement of the display panel. The identification unit 10 can acquire the biometric detection area 200. According to the identification unit 10, the position and range of the biometric detection area 200 can be determined. The biometric detection area 200 includes two or more sub-areas 210, and the sub-area 210 at least includes a photosensitive sub-pixel 120. The photosensitive sub-pixel 120 in the sub-area 210 can be used for acquiring the photosensitive information of the sub-area 210. The acquisition unit 20 can determine the first photosensitive information at a first moment and the second photosensitive information at a second moment of each sub-area 210 according to the photosensitive information acquired by the photosensitive sub-pixel 120 in the sub-area 210. The first stress calculation unit 30 can determine the first stress change information according to the first photosensitive information and the second photosensitive information, that is, determine the first stress change information of the sub-area 210, and further can determine the stress condition of the biometric detection area 200. Therefore, the display panel provided by the embodiment of the present application can not only achieve the display effect, but also obtain the stress effect of the biometric detection area 200 on the display panel, and further facilitate the controller of the display device to implement various functions according to the stress effect, and can improve the use performance of the display panel.

[0048] Optionally, the light-emitting sub-pixel 110 includes a red sub-pixel 111, a green sub-pixel 112, and a blue sub-pixel 113 to achieve color display of the display panel. The photosensitive sub-pixel 120 can be used to sense the light emitted by the red sub-pixel 111, the light emitted by the green sub-pixel 112, or the light emitted by the blue sub-pixel 113. The photosensitive sub-pixel 120 can also be used to sense other light, for example, the photosensitive sub-pixel 120 can be used to sense infrared light.

[0049] Optionally, the area of the photosensitive sub-pixel 120 is smaller than the area of the light-emitting sub-pixel 110. For example, the area of the photosensitive sub-pixel 120 is smaller than the area of at least one of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113. Optionally, the area of the photosensitive sub-pixel 120 is smaller than the area of any one of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113. The distribution area of the photosensitive sub-pixel 120 is small, and the distribution area of the light-emitting sub-pixel 110 is large, which can ensure the display effect of the display panel.

[0050] There are various arrangements of the red sub-pixel 111, the green sub-pixel 112, the blue sub-pixel 113, and the photosensitive sub-pixel 120. For example, the red sub-pixel 111 and the green sub-pixel 112 are spaced apart along the second direction Y, the blue sub-pixel 113 and the photosensitive sub-pixel 120 are distributed along the second direction Y, and the columns where the red sub-pixel 111 and the green sub-pixel 112 are located are spaced apart from the columns where the blue sub-pixel 113 and the photosensitive sub-pixel 120 are located along the first direction X, so that the distribution of the red sub-pixel 111, the green sub-pixel 112, the blue sub-pixel 113, and the photosensitive sub-pixel 120 is more uniform. In addition, the area of the blue sub-pixel 113 is generally larger than the areas of the red sub-pixel 111 and the green sub-pixel 112, and the area of the photosensitive sub-pixel 120 is generally smaller than the sum of the areas of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113. The red sub-pixel 111 and the green sub-pixel 112 are arranged in the same column, and the photosensitive sub-pixel 120 and the blue sub-pixel 113 are arranged in the same column, making the distribution of the sub-pixels more scientific and reasonable, and capable of improving the pixel aperture ratio.

[0051] As Figure 3 and Figure 4 shown, the biometric detection area 200 can be used to identify the user's fingerprint, for example. When the user manipulates the display panel in the Figure 3 shown manner, Figure 4The traveling direction of the light is indicated by an arrow. When the light reaches the user's fingerprint and is reflected, the photosensitive sub-pixel 120 can obtain the reflected light and thus obtain fingerprint information. The photosensitive sub-pixel 120 can also determine data such as a pulse wave based on the reflected light information, and further determine the change in the force applied by the user to the display panel. Optionally, the biometric monitoring area can be used to detect the force applied by the user's finger, palm, etc. on the display panel. In this application, an example is given where the biometric monitoring area is used to detect the force applied by the user's finger on the display panel. In addition, in this application, the sensor (i.e., the photosensitive sub-pixel 120) is directly integrated on the display panel, and the photosensitive sub-pixel 120 can be configured in the entire display area of the display panel to achieve a full-screen response at a relatively fast speed. The embodiments of this application do not require an external device to obtain data such as a pulse wave, and can determine the control of game objects in the display panel. Moreover, in the embodiments of this application, the user's finger does not need to leave the surface of the display panel to obtain data such as a pulse wave and determine the force information, realizing a smooth transfer between data acquisition and game operations.

[0052] Optionally, as Figures 4 to 6 shown, the display panel further includes a pixel definition layer 160. The pixel definition layer 160 includes a pixel limiting portion 161 and a pixel opening 162. The light-emitting sub-pixel 110 includes a light-emitting structure 115, and the photosensitive sub-pixel 120 includes a photosensitive structure 122. The light-emitting structure 115 and the photosensitive structure 122 are both located in the pixel opening 162. Optionally, the light-emitting sub-pixel 110 and the photosensitive sub-pixel 120 may further include a carrier layer and a common electrode layer 140. The carrier layers of the light-emitting sub-pixel 110 and the photosensitive sub-pixel 120 can be interconnected into a whole-surface structure. The carrier layer may include a first carrier layer 131 located on the side of the light-emitting structure 115 and the photosensitive structure 122 facing away from the common electrode, and a second carrier layer 132 facing the common electrode layer 140. A light extraction layer 170 may also be provided on the common electrode layer 140. The common electrode layers 140 of the light-emitting sub-pixel 110 and the photosensitive sub-pixel 120 can be interconnected into a whole-surface structure. The light-emitting sub-pixel 110 further includes a pixel electrode 114, and the pixel electrode 114 is located on the side of the light-emitting structure 115 facing away from the common electrode layer 140. The photosensitive sub-pixel 120 further includes a photosensitive electrode 121, and the photosensitive electrode 121 is located on the side of the photosensitive structure 122 facing away from the common electrode layer 140. Optionally, a packaging layer is provided on the common electrode layer 140. The packaging layer includes a first packaging layer 151, a second packaging layer 152, and a third packaging layer 153. The first packaging layer 151 and the third packaging layer 153 may be inorganic packaging layers, and the second packaging layer 152 may be an organic packaging layer.

[0053] Figure 5 and Figure 4 The difference from Figure 5An isolation structure 400 is provided on the middle pixel definition layer 160, and the isolation structure 400 is used to separate the light-emitting material layer into independent light-emitting structures 115. And Figure 5 Both the middle common electrode layer 140 and the first encapsulation layer 151 are separated by the isolation structure 400 into a plurality of independent units. Figure 6 And Figure 5 The difference is that redundant material is reserved between the first encapsulation layer 151 and the isolation structure 400.

[0054] The first stress change information of the sub-region 210, that is, the change information of the first stress received by the sub-region 210. The first stress received by the sub-region 210 can be the pressure applied by the user to the display panel, that is, the direction of the first stress is perpendicular to the display surface of the display panel.

[0055] In some alternative embodiments, please continue to refer to Figures 1 to 7 , the display panel further includes a second stress calculation unit 40, and the second stress calculation unit 40 is further configured to determine the second stress change information of the biometric detection region 200 according to the first stress change information of two adjacent sub-regions 210.

[0056] In these alternative embodiments, the first stress calculation unit 30 can calculate the change information of the first stress received by a single sub-region 210, and the second stress calculation unit 40 can determine the change information of the second stress received by the entire biometric detection region 200 according to the first stress change information of two adjacent sub-regions 210, which is convenient for controlling the display panel according to the overall force of the biometric detection region 200.

[0057] There are various ways to set the second stress change information. For example, the second stress change information is the magnitude information of the force on the entire biometric detection region 200.

[0058] In some other alternative embodiments, the second stress change information includes the change of the second stress received by the biometric detection region 200 in the side-by-side direction of two adjacent sub-regions 210.

[0059] In these alternative embodiments, not only can the change information of the pressure (i.e., the first stress) received by the sub-region 210 be obtained, but also the change direction of the second stress received by the entire biometric detection region 200 can be determined according to the change of the first stress information, which is convenient for controlling the display content of the display panel according to the change direction of the stress, and can further improve the use effect of the display panel.

[0060] Optionally, the first stress change information includes information on the increase and / or decrease of the first stress received by the sub-region 210. That is, the first stress change information characterizes whether the first stress received by the sub-region 210 increases or decreases. The first stress calculation unit 30 can determine whether the first stress increases or decreases from the first moment to the second moment based on the first photosensitive information at the first moment and the second photosensitive information at the second moment.

[0061] Optionally, the second stress calculation unit 40 is further configured to determine the direction of the second stress as pointing from the sub-region 210 with a decreasing first stress to the sub-region 210 with an increasing first stress when, among two adjacent sub-regions 210, the first stress of one of them increases and the first stress of the other decreases.

[0062] In these alternative embodiments, when, among two adjacent sub-regions 210, the first stress of one of them increases and the first stress of the other decreases, it indicates that the direction of the user's finger force application has changed, and the finger exerts force in the direction of the increasing first stress. Therefore, the direction of the second stress is from the sub-region 210 with a decreasing first stress to the sub-region 210 with an increasing first stress. According to the embodiments of the present application, the direction change of the second stress in the plane of the display panel can be accurately determined.

[0063] There are various distribution methods for the multiple sub-regions 210, such as Figure 1 As shown, the multiple sub-regions 210 may be arranged in an array along the first direction X and the second direction Y. For example, in some alternative embodiments, at least two sub-regions 210 are distributed along the first direction X, and the second stress calculation unit 40 is further configured to determine the change of the second stress in the first direction X based on the first stress change information of at least two sub-regions 210 distributed along the first direction X, and / or at least two sub-regions 210 are distributed along the second direction Y, and the second stress calculation unit 40 is further configured to determine the change of the second stress in the second direction Y based on the first stress change information of at least two sub-regions 210 distributed along the second direction Y.

[0064] In these alternative embodiments, when there are two sub-regions 210 distributed along the first direction X, and when the first stress of one of the two sub-regions 210 increases and the first stress of the other decreases, it is determined that the change of the second stress in the first direction X is from the sub-region 210 with a decreasing first stress to the sub-region 210 with an increasing first stress. When there are two sub-regions 210 distributed along the second direction Y, and when the first stress of one of the two sub-regions 210 increases and the first stress of the other decreases, it is determined that the change of the second stress in the second direction Y is from the sub-region 210 with a decreasing first stress to the sub-region 210 with an increasing first stress.

[0065] In the embodiments of the present application, when multiple sub-regions 210 are arranged in an array along the first direction X and the second direction Y, the change direction of the second stress in the first direction X and the second direction Y can be determined according to the change of the first stress in the multiple sub-regions 210, so as to accurately judge the change trend of the user's finger, which is convenient for determining the screen display according to the change trend of the user's finger, and can further improve the use effect of the display panel.

[0066] Optionally, the direction of the first stress is the third direction Z, and the third direction Z intersects with the first direction X and the second direction Y pairwise. For example, the first stress is perpendicular to the display surface, while the first direction X, the second direction Y, and the display surface are parallel.

[0067] In some alternative embodiments, as Figure 8 shown, the multiple sub-regions 210 are arranged in n rows and m columns along the first direction X and the second direction Y, where n and m are both positive integers greater than or equal to 2, the first direction X is the row direction, and the second direction Y is the column direction. In Figure 8 the shown embodiment, n and m are both 2, and the four sub-regions 210 are arranged in two rows and two columns. Optionally, the display panel further includes a peripheral region 201 located on the outer peripheral side of the biometric detection region 200, and light-emitting sub-pixels 110 are arranged in the peripheral region 201.

[0068] In these alternative embodiments, the multiple sub-regions 210 are arranged in n rows and m columns along the first direction X and the second direction Y, so that there are two adjacent sub-regions 210 in both the first direction X and the second direction Y, and the change of the stress received by the biometric detection region 200 of the display panel in the first direction X, the second direction Y, and the third direction Z can be determined, that is, the triaxial force direction of the display panel can be determined, which can well improve the use effect of the display panel.

[0069] There are various ways to set the shape of the sub-region 210. For example, as Figure 8 shown, the sub-region 210 can be rectangular. Or, as Figure 7 shown, when n and m are both 2, the four sub-regions 210 are circularly distributed. Optionally, the peripheral region 201 surrounds the sub-region 210, and the shape of the peripheral region 201 is adapted to the shape of the sub-region 210.

[0070] In some alternative embodiments, the n×m sub-regions 210 form m first sub-region groups distributed along the first direction X, and each first sub-region group includes n sub-regions 210 distributed along the second direction Y. The first stress calculation unit 30 is further configured to obtain the first stress change information of at least two sub-regions 210 distributed along the second direction Y in each first sub-region group, and the second stress calculation unit 40 is further configured to determine the change of the second stress in the second direction Y according to the first stress change information of each first sub-region group.

[0071] In these alternative embodiments, the plurality of sub-regions 210 include m first sub-region groups distributed along the first direction X, and each first sub-region group includes n sub-regions 210 distributed along the second direction Y. The first stress calculation unit 30 can obtain the change in the first stress received by the plurality of sub-regions 210 within the first sub-region group, and the second stress calculation unit 40 can determine the change in the second stress within the first sub-region group in the second direction Y. Therefore, the change in the second stress within the m first sub-region groups in the second direction Y can be obtained, which can improve the accuracy of judging the change in the second stress in the second direction Y.

[0072] And / or, in some alternative embodiments, n rows and m columns of sub-regions 210 form n second sub-region groups distributed along the second direction Y. Each second sub-region group includes m sub-regions 210 distributed along the first direction X. The first stress calculation unit 30 is further configured to obtain the first stress change information of at least two sub-regions 210 distributed along the first direction X within each second sub-region group, and the second stress calculation unit 40 is further configured to determine the change in the second stress in the first direction X according to the first stress change information of each second sub-region group.

[0073] In these alternative embodiments, the plurality of sub-regions 210 include n second sub-region groups distributed along the second direction Y, and each second sub-region group includes n sub-regions 210 distributed along the first direction X. The first stress calculation unit 30 can obtain the change in the first stress received by the plurality of sub-regions 210 within the second sub-region group, and the second stress calculation unit 40 can determine the change in the second stress within the second sub-region group in the first direction X. Therefore, the change in the second stress within the n second sub-region groups in the first direction X can be obtained, which can improve the accuracy of judging the change in the second stress in the first direction X.

[0074] In other alternative embodiments, as Figure 10 shown, the plurality of sub-regions 210 can also be distributed in other ways. For example, the plurality of sub-regions 210 include a central sub-region 211, a first sub-region 212 located on at least one side of the central sub-region 211 in the first direction X, and a second sub-region 213 located on at least one side of the central sub-region 211 in the second direction Y. In Figure 7 the illustrated embodiment, the number of the first sub-regions 212 can be two, and the two first sub-regions 212 are respectively arranged on both sides of the central sub-region 211. The number of the second sub-regions 213 is two, and the two second sub-regions 213 are respectively arranged on both sides of the central sub-region 211. The shape of the peripheral region 201 is adapted to the shape of the sub-region 210. For example, a part of the peripheral region 201 is located between the first sub-region 212 and the second sub-region 213.

[0075] In these alternative embodiments, the multiple sub-regions 210 include a central sub-region 211, a first sub-region 212, and a second sub-region 213, which are distributed in the above-described manner such that two adjacent sub-regions 210 are provided in both the first direction X and the second direction Y, so as to facilitate determining the change of the second stress in the first direction X and the second direction Y based on the central sub-region 211, the first sub-region 212, and the second sub-region 213.

[0076] There are various ways to set the shapes of the central sub-region 211, the first sub-region 212, and the second sub-region 213, such as Figure 8 As shown, the shapes of the central sub-region 211, the first sub-region 212, and the second sub-region 213 can be rectangular. Alternatively, as Figure 9 shown, the central sub-region 211 is circular, and two first sub-regions 212 and two second sub-regions 213 are arranged around the periphery of the central sub-region 211, and the two first sub-regions 212 and the two second sub-regions 213 enclose the central sub-region 211 to form a closed ring.

[0077] In some alternative embodiments, the first stress calculation unit 30 is further configured to obtain the first stress change information of the central sub-region 211 and the first sub-region 212; the second stress calculation unit 40 is further configured to determine the change of the second stress in the first direction X based on the first stress change information of the central sub-region 211 and the first sub-region 212.

[0078] In these alternative embodiments, the first sub-region 212 and the central region are distributed in the first direction X, and the change of the second stress in the first direction X can be determined based on the first sub-region 212 and the central region.

[0079] In some alternative embodiments, the first stress calculation unit 30 is further configured to obtain the first stress change information of the central sub-region 211 and the second sub-region 213; the second stress calculation unit 40 is further configured to determine the change of the second stress in the second direction Y based on the first stress change information of the central sub-region 211 and the second sub-region 213.

[0080] In these alternative embodiments, the second sub-region 213 and the central region are distributed in the second direction Y, and the change of the second stress in the second direction Y can be determined based on the second sub-region 213 and the central region.

[0081] In some alternative embodiments, when the first stress changes of the multiple sub-regions 210 are the same, the second stress calculation unit 40 is further configured to determine that the direction of the second stress is the third direction Z, and the third direction Z is perpendicular to the display surface of the display panel.

[0082] In these alternative embodiments, the change in the second stress in the third direction Z can also be determined according to the change in the first stress received by the plurality of sub-regions 210.

[0083] In some alternative embodiments, the second stress calculation unit 40 is further configured to determine that the second stress decreases in the third direction Z when the first stress of the plurality of sub-regions 210 all decreases; and / or, when the stress calculation unit is further configured to determine that the second stress increases in the third direction Z when the first stress of the plurality of sub-regions 210 all increases.

[0084] In these alternative embodiments, when the plurality of first stresses all increase in the third direction Z, it indicates that the second stress of the entire biometric detection region 200 increases in the third direction Z. When the plurality of first stresses all decrease in the third direction Z, it indicates that the second stress of the entire biometric detection region 200 decreases in the third direction Z.

[0085] There are various ways to obtain the first stress. For example, a pressure sensor, such as a piezoresistive sensor, can be arranged in the display panel to obtain the first stress.

[0086] In some other alternative embodiments, the first stress calculation unit 30 is configured to determine the pulse wave data of each sub-region 210 according to the sensed light information, and determine the first stress change information of each sub-region 210 according to the pulse wave data.

[0087] In these alternative embodiments, the photosensing sub-pixel 120 can obtain the sensed light information of the user's finger, and then can obtain the image information of the finger. According to the image information of the finger, the pulse wave data of the user's finger on the sub-region 210 can be determined. When the user's finger presses the panel forcefully, the pulse wave image will change. Therefore, the first stress calculation unit 30 can determine the first stress change information of the sub-region 210 according to the pulse wave data.

[0088] Optionally, when using the display panel provided in the embodiment of the present application to detect the fingertip image information of the user in the biometric detection region 200, the light emitted by the light-emitting sub-pixel 110 can be diffused inside the fingertip organism and reflected. The photosensing sub-pixel 120 can obtain these reflected lights and then determine the fingertip image. During this process, as Figure 12a and Figure 12bAs shown, the main factors affecting the reflected light are as follows: (1) Light loss occurs at the contact surface between the fingertip surface and the display panel. (2) The influence on light reflection caused by components other than blood in the living body, such as connective tissue, muscle, bone, etc. (3) The venous blood in the fingertip. (4) The residual arterial blood in the fingertip. (5) The pulsating arterial blood in the fingertip. Among them, the pulsating arterial blood in the fingertip in point (5) changes over time. Strictly speaking, the pulse wave data includes the light changes caused by the second to fifth points. In the embodiments of the present application, the pulse wave data may include the change in the intensity of the reflected light sensed by the photosensitive sub-pixels 120 over time. The pulse wave data signal can be divided into an alternating current component and a direct current component. Among them, the change in the alternating current is due to point (5). For example, the frequency is 1Hz - 2Hz at rest, and its magnitude is 1 / 10 to 1 / 100 of the direct current component. Optionally, the pulse wave data signal can not only infer the pulse, but also infer the mental stress state and blood pressure.

[0089] In some embodiments, as Figure 12a and Figure 13a shown, assume Figure 12a is a schematic diagram of the fingertip in contact with the display panel in a natural state, Figure 13a is a schematic diagram of the fingertip pressing the display panel. If the fingertip presses the biometric detection area 200, the display panel and the fingertip will be in closer contact, the contact area will increase, and blood flow will also be blocked, so the blood volume will decrease. Therefore, as Figure 12b and Figure 13b shown, the loss caused by components other than the above point (2) is reduced, and as a result, the alternating current AC component of the pulse wave data signal decreases and the direct current DC component increases. This phenomenon can be used to determine the stress along the third direction Z.

[0090] In the embodiments of the present application, a plurality of sub-regions 210 are arranged in two or more rows and two or more columns along the first direction X and the second direction Y. By comparing the pulse wave data of each sub-region 210, the first stress change of each sub-region 210 can be inferred, and the force conditions of the biometric detection area 200 in the three directions of the first direction X, the second direction Y, and the third direction Z can be detected.

[0091] Optionally, the first stress calculation unit 30 is used to determine the first stress change information according to the change of the alternating current signal and / or the direct current signal of the pulse wave data of each sub-region 210. In these optional embodiments, the change of the first stress over time can be determined according to the change of the alternating current signal and / or the direct current signal.

[0092] For example, the first stress calculation unit 30 is configured to determine that the first stress of the sub-region 210 increases when the alternating current signal of the sub-region 210 decreases over time. And / or, the first stress calculation unit 30 is configured to determine that the first stress of the sub-region 210 increases when the direct current signal of the sub-region 210 increases over time.

[0093] For another example, the first stress calculation unit 30 is configured to determine that the first stress of the sub-region 210 decreases when the alternating current signal of the sub-region 210 increases over time; and / or, the first stress calculation unit 30 is configured to determine that the first stress of the sub-region 210 decreases when the direct current signal of the sub-region 210 decreases over time.

[0094] It can be understood that, referring to the above text, when the alternating current signal of the pulse wave data signal decreases over time, the direct current signal increases over time. When the alternating current signal of the pulse wave data signal increases over time, the direct current signal decreases over time.

[0095] In some alternative embodiments, the acquisition unit 20 is configured to acquire first photosensitive information and second photosensitive information by using the photosensitive sub-pixels 120 located within the biometric detection region 200.

[0096] In these alternative embodiments, acquiring the first photosensitive information and the second photosensitive information by using the photosensitive sub-pixels 120 within the biometric detection region 200 can improve the accuracy of the force analysis of the biometric detection region 200.

[0097] Optionally, the sub-region 210 includes light-emitting sub-pixels 110, and the acquisition unit 20 is configured to, when the light-emitting sub-pixels 110 within the biometric detection region 200 are turned off and at least one light-emitting sub-pixel 110 located on the periphery of the biometric detection region 200 is turned on, for example, when at least one light-emitting sub-pixel 110 in the peripheral region 201 is turned on, acquire the reflected light information of the light emitted by at least one light-emitting sub-pixel 110 by using the photosensitive sub-pixels 120 located within the biometric detection region 200.

[0098] In these alternative embodiments, when acquiring the first photosensitive information and the second photosensitive information by using the photosensitive sub-pixels 120 within the biometric detection region 200, the light-emitting sub-pixels 110 within the biometric detection region 200 are turned off, and the light-emitting sub-pixels 110 located on the periphery of the biometric detection region 200 are turned on, so that the light emitted by the light-emitting sub-pixels 110 located outside the biometric detection region 200 is reflected after passing through the fingertip, and the photosensitive sub-pixels 120 acquire this reflected light to determine the first photosensitive information and the second photosensitive information, which can improve the influence of the light emission of the light-emitting sub-pixels 110 within the biometric detection region 200 on the photosensitive sub-pixels 120 and can improve the accuracy of the analysis result.

[0099] Optionally, the light-emitting sub-pixels 110 located around the biometric detection area 200 can be located outside the biometric detection area 200 and adjacent to the edge of the biometric detection area 200. For example, the light-emitting sub-pixels 110 located around the biometric detection area 200 can be located in the peripheral area 201.

[0100] In some alternative embodiments, such as Figures 1 to 14 As shown, the light emitted by the light-emitting sub-pixel 110 is intermittent light, and the light-emitting sub-pixel 110 does not emit light in the first time period, and the light-emitting sub-pixel 110 emits light in the second time period. The obtaining unit 20 is configured to obtain first light information in the first time period and second light information in the second time period, and filter ambient light according to the first light information and the second light information to determine actual sensed light information.

[0101] In these alternative embodiments, the light emitted by the light-emitting sub-pixel 110 is intermittent light. When the light-emitting sub-pixel 110 does not emit light in the first time period, the first light information obtained by the obtaining unit 20 in the first time period is the sensed light information caused by the presence of ambient light. When the light-emitting sub-pixel 110 emits light in the second time period, the second light information obtained by the obtaining unit 20 in the second time period includes both the sensed light information caused by ambient light and the sensed light information caused by the light-emitting sub-pixel 110. According to the first sensed light information and the second light information, the sensed light information caused by ambient light can be removed from the second light information to determine the actual sensed light information, thereby filtering the influence of ambient light.

[0102] Optionally, the first sensed light information at the first moment and the second sensed light information at the second moment obtained by the obtaining unit 20 can both be actual sensed light information. For example, at the first moment, there are a first time period and a second time period. The obtaining unit 20 determines the first sensed light information according to the sensed light information in the first time period and the second time period within the first moment. The obtained first sensed light information filters the influence of ambient light and is the actual sensed light information emitted by the light-emitting sub-pixel 110 and reflected by the fingertip. Similarly, at the second moment, there are a first time period and a second time period. The obtaining unit 20 determines the second sensed light information according to the sensed light information in the first time period and the second time period within the second moment. The obtained second sensed light information filters the influence of ambient light and is the actual sensed light information emitted by the light-emitting sub-pixel 110 and reflected by the fingertip.

[0103] In some other alternative embodiments, such as Figure 15As shown, the display panel further includes a light filtering structure 300. The light filtering structure 300 includes a first color filtering unit 310 and a second color filtering unit 320. The photosensitive sub-pixel 120 is configured to obtain first color light information and second color light information. The light-emitting sub-pixel 110 includes a first color photon sub-pixel and other color photon sub-pixels. The obtaining unit 20 is further configured to, when the first color photon sub-pixel is turned on and other color photon sub-pixels are turned off, determine the second color light intensity in the ambient light according to the second color light information and determine the first color light intensity in the ambient light, and determine the first color actual sensed light information according to the first color light information and the first color light intensity in the ambient light.

[0104] The first color photon sub-pixel can be one of a green sub-pixel 112, a red sub-pixel 111, and a blue sub-pixel 113. The other color photon sub-pixels are other light-emitting sub-pixels 110 in the light-emitting sub-pixel 110 except the first color photon sub-pixel.

[0105] There are multiple ways for the photosensitive sub-pixel 120 to obtain the first color light information and the second color light information. For example, the photosensitive sub-pixel 120 includes a first photosensitive sub-pixel 120 and a second photosensitive sub-pixel 120. The first photosensitive sub-pixel 120 is configured to obtain the first color light information, and the second photosensitive sub-pixel 120 is configured to obtain the second color light information. The first photosensitive sub-pixel 120 and the second photosensitive sub-pixel 120 are used to obtain different color light information.

[0106] Alternatively, the photosensitive sub-pixel 120 includes a first photosensitive sub-pixel 120 and a second photosensitive sub-pixel 120. The first color filtering unit 310 and the first photosensitive sub-pixel 120 are correspondingly arranged, and the second color filtering unit 320 and the second photosensitive sub-pixel 120 are correspondingly arranged. Both the first photosensitive sub-pixel 120 and the second photosensitive sub-pixel 120 are configured to sense the first color light information and the second color light information. The first photosensitive sub-pixel 120 is configured to obtain the first color light information passing through the first filtering unit, and the second photosensitive sub-pixel 120 is configured to obtain the second color light information passing through the second filtering unit. In these alternative embodiments, the structures of the first photosensitive sub-pixel 120 and the second photosensitive sub-pixel 120 are the same and can be fabricated in the same process step. Since the first photosensitive sub-pixel 120 and the first color filtering unit 310 are correspondingly arranged, the light information sensed by the first photosensitive sub-pixel 120 is the first color light information passing through the first color filtering unit 310. Similarly, the light information sensed by the second photosensitive sub-pixel 120 is the second color light information passing through the second color filtering unit 320.

[0107] The first photosensitive pixel 120 and the first color filter unit 310 are correspondingly arranged. For example, the projection of the first photosensitive pixel 120 in the thickness direction and the projection of the first color filter unit 310 in the thickness direction at least partially overlap. For example, the projection of the first photosensitive pixel 120 in the thickness direction is located within the projection of the first color filter unit 310 in the thickness direction. Similarly, the second photosensitive pixel 120 and the second color filter unit 320 are correspondingly arranged. For example, the projection of the second photosensitive pixel 120 in the thickness direction and the projection of the second color filter unit 320 in the thickness direction at least partially overlap. For example, the projection of the second photosensitive pixel 120 in the thickness direction is located within the projection of the second color filter unit 320 in the thickness direction.

[0108] In these alternative embodiments, the filter structure 300 includes a first color filter unit 310 and a second color filter unit 320. The first color filter unit 310 is configured to allow the first color light to pass through, and the second color filter unit 320 is configured to allow the second color light to pass through. The photosensitive pixel 120 can acquire the first color light information and the second color light information. When the light-emitting pixel 110 emits the first color light, the first color light information acquired by the photosensitive pixel 120 includes both the first color light in the ambient light and the first color light emitted by the light-emitting pixel 110. And the second color light information acquired by the photosensitive pixel 120 includes the second color light in the ambient light. According to the ratio of the second color light and the first color light in the ambient light, the first color light intensity in the ambient light can be determined based on the second color light information. Then, by removing the first color light in the ambient light from the first color light information, the first color actual sensed light information can be determined.

[0109] Optionally, the filter structure 300 further includes a third color filter unit 330. Optionally, the first color filter unit 310 is a green filter unit, and the first color filter unit 310 and the green sub-pixel 112 are correspondingly arranged. Optionally, the second color filter unit 320 is a red filter unit, and the second color filter unit 320 and the red sub-pixel 111 are correspondingly arranged. Optionally, the third color filter unit 330 is a blue filter unit, and the third color filter unit 330 and the blue sub-pixel 113 are correspondingly arranged. The corresponding arrangement method is as described above and will not be elaborated here.

[0110] Optionally, the photosensitive sub-pixel 120 can be used to sense green light and red light. Then, the first color filter unit 310 can be a green filter unit, the second color filter unit 320 can be a red filter unit, and the third color filter unit 330 can be a blue filter unit. Assuming that the green light is the target light, that is, the second color filter unit 320 is correspondingly arranged on the photosensitive sub-pixel 120, the green light amount of the green sensed light obtained by the obtaining unit 20 that belongs to the ambient light part can be determined according to the red photosensitive information and the light amount ratio of the red light and the green light in the ambient light. Furthermore, the green light amount of the photosensitive sub-pixel 110 that belongs to the fingerprint reflection in the green sensed light can be determined, thereby filtering out the influence of the ambient light.

[0111] In some other embodiments, the second color light intensity in the ambient light can also be determined according to the first color light information, and finally the second color actual sensed light information can be determined.

[0112] Optionally, both the first photosensitive information and the second photosensitive information obtained by the obtaining unit 20 are actual sensed light information. That is, the sensed light information in the ambient light is excluded from the first photosensitive information obtained by the obtaining unit 20, and the sensed light information in the ambient light is also excluded from the second photosensitive information obtained by the obtaining unit 20 to improve the accuracy of the corresponding stress judgment.

[0113] In some optional embodiments, the recognition unit 10 includes: a first recognition subunit, configured to obtain the current touch operation position information of the user; and a second recognition subunit, configured to determine the biometric detection area 200 according to the current touch operation position information.

[0114] In these optional embodiments, the recognition unit 10 includes a first recognition subunit and a second recognition subunit. The first recognition subunit can obtain the touch operation position information of the user to determine the position of the user's touch operation, and the second recognition subunit can determine the biometric detection area 200 according to the touch operation position information.

[0115] Optionally, the display panel further includes a control unit, and the control unit is further configured to output a control instruction according to the second stress change information and / or the first stress, so as to implement the control of the display screen of the display device.

[0116] For further explanation of the present application, taking Figure 7 the four sub-areas 210 included in the biometric detection area 200 shown as an example, how to determine the second stress information will be described.

[0117] As Figure 7As shown, multiple sub-regions 210 include four sub-regions 210, which are distributed in two rows and two columns along the first direction X and the second direction Y. The four sub-regions 210 are the PD-1 region, the PD-2 region, the PD-3 region, and the PD-4 region respectively.

[0118]

[0119] Please refer to Figure 16 、 Figure 17 and the above table. At and before time T1, it indicates that the user's finger is in a natural contact state with the screen. From time T1 to time T2, the alternating current signal ΔAC1 in the PD-1 region decreases, and the direct current signal ΔDC1 increases, indicating that the first stress on the PD-1 region increases in the third direction Z. Similarly, the first stress on the PD-2 region increases in the third direction Z. On the contrary, the first stress on the PD-3 region and the PD-4 region decreases in the third direction Z. It indicates that the direction of the second stress on the entire biometric detection region 200 points from the PD-3 region to the PD-2 region. At the same time, the direction of the second stress on the entire biometric detection region 200 points from the PD-4 region to the PD-1 region. The user's finger has a tendency to exert an upward force in the Figure 14 viewing direction shown, and the display screen can be adjusted according to this tendency.

[0120] From time T2 to time T3, the alternating current signal ΔAC1 in the PD-1 region increases, and the direct current signal ΔDC1 decreases, indicating that the first stress on the PD-1 region decreases in the third direction Z. Similarly, the first stress on the PD-2 region decreases in the third direction Z. On the contrary, the first stress on the PD-3 region and the PD-4 region increases in the third direction Z. It indicates that the direction of the second stress on the entire biometric detection region 200 points from the PD-1 region to the PD-4 region. At the same time, the direction of the second stress on the entire biometric detection region 200 points from the PD-2 region to the PD-3 region. The user's finger has a tendency to exert a downward force in the Figure 14 viewing direction shown, and the display screen can be adjusted according to this tendency.

[0121] From time T3 to time T4, the alternating current signal ΔAC1 in the PD-1 region decreases, and the direct current signal ΔDC1 increases, indicating that the first stress on the PD-1 region increases in the third direction Z. Similarly, the first stress on the PD-4 region increases in the third direction Z. On the contrary, the first stress on the PD-2 region and the PD-3 region decreases in the third direction Z. It indicates that the direction of the second stress on the entire biometric detection region 200 points from the PD-2 region to the PD-1 region. At the same time, the direction of the second stress on the entire biometric detection region 200 points from the PD-3 region to the PD-4 region. The user's finger has a tendency to exert force to the right in the Figure 14 shown view direction, and the display screen can be adjusted according to this tendency.

[0122] From time T4 to time T5, the alternating current signal ΔAC1 in the PD-1 region increases, and the direct current signal ΔDC1 decreases, indicating that the first stress on the PD-1 region decreases in the third direction Z. Similarly, the first stress on the PD-4 region decreases in the third direction Z. On the contrary, the first stress on the PD-2 region and the PD-3 region increases in the third direction Z. It indicates that the direction of the second stress on the entire biometric detection region 200 points from the PD-1 region to the PD-2 region. At the same time, the direction of the second stress on the entire biometric detection region 200 points from the PD-4 region to the PD-3 region. The user's finger has a tendency to exert force to the left in the Figure 14 shown view direction, and the display screen can be adjusted according to this tendency.

[0123] From time T5 to time T6, the alternating current signal in the PD-1 region decreases, and the direct current signal increases, indicating that the first stress on the PD-1 region increases in the third direction Z. Similarly, the first stress on the PD-2, PD-3, and PD-4 regions all increase in the third direction Z. It indicates that the direction of the second stress on the entire biometric detection region 200 is the third direction Z and is the direction of squeezing the display panel. The user's finger has a tendency to exert force on the display panel in the Figure 14 shown view direction, and the display screen can be adjusted according to this tendency.

[0124] To further explain the present application, taking the Figure 10 five sub-regions 210 included in the biometric detection region 200 shown as an example, how to determine the second stress information will be described.

[0125] As Figure 10As shown, a plurality of sub-regions 210 include a central sub-region 211 and two first sub-regions 212 located on both sides of the central sub-region 211 in the first direction X, and two second sub-regions 213 located on both sides of the central sub-region 211 in the second direction Y. That is, the number of sub-regions 210 is 5, and the 5 sub-regions 210 are numbered as PD-1 region, PD-2 region, PD-3 region, PD-4 region, and PD-5 region respectively.

[0126]

[0127] Please refer to Figure 16 、 Figure 18 and the above table. Before and at time T1, it means that the user's finger is in a natural contact state with the screen. From time T1 to time T2, the alternating current signal ΔAC1 in the PD-1 region remains unchanged, the direct current signal ΔDC1 remains unchanged, and the first stress received by the PD-1 region remains unchanged in the third direction Z. Similarly, the first stress received by the PD-3 region and the PD-5 region remains unchanged in the third direction Z; the alternating current signal ΔAC2 in the PD-2 region decreases, the direct current signal ΔDC2 increases, and the first stress received by the PD-2 region increases in the third direction Z; on the contrary, the first stress received by the PD-4 region decreases in the third direction Z. It means that the direction of the second stress received by the entire biometric detection region 200 points from the PD-4 region to the PD-5 region and then to the PD-2 region. The user's finger has a tendency to exert an upward force in the Figure 14 view direction shown, and the display screen can be adjusted according to this tendency.

[0128] From time T2 to time T3, the alternating current signal ΔAC1 in the PD-1 region remains unchanged, the direct current signal ΔDC1 remains unchanged, and the first stress received by the PD-1 region remains unchanged in the third direction Z. Similarly, the first stress received by the PD-3 region and the PD-5 region remains unchanged in the third direction Z; the alternating current signal ΔAC2 in the PD-2 region increases, the direct current signal ΔDC2 decreases, and the first stress received by the PD-2 region decreases in the third direction Z; on the contrary, the first stress received by the PD-4 region increases in the third direction Z. It means that the direction of the second stress received by the entire biometric detection region 200 points from the PD-2 region to the PD-5 region and then to the PD-4 region. The user's finger has a tendency to exert an upward force in the Figure 14 view direction shown, and the display screen can be adjusted according to this tendency.

[0129] From time T3 to time T4, the alternating current signal ΔAC1 in the PD-1 region decreases, and the direct current signal ΔDC1 increases. The first stress received by the PD-1 region increases in the third direction Z. On the contrary, the first stress received by the PD-3 region decreases in the third direction Z. The first stresses received by the PD-2, PD-4, and PD-5 regions remain unchanged in the third direction Z. It indicates that the direction of the second stress received by the entire biometric detection area 200 points from the PD-3 region to the PD-5 region and then to the PD-1 region. The user's finger has a tendency to exert force towards the right in the Figure 14 view direction shown, and the display screen can be adjusted according to this tendency.

[0130] From time T4 to time T5, the alternating current signal ΔAC1 in the PD-1 region increases, and the direct current signal ΔDC1 decreases. The first stress received by the PD-1 region decreases in the third direction Z. On the contrary, the first stress received by the PD-3 region increases in the third direction Z. The first stresses received by the PD-2, PD-4, and PD-5 regions remain unchanged in the third direction Z. It indicates that the direction of the second stress received by the entire biometric detection area 200 points from the PD-1 region to the PD-5 region and then to the PD-3 region. The user's finger has a tendency to exert force towards the left in the Figure 14 view direction shown, and the display screen can be adjusted according to this tendency.

[0131] From time T5 to time T6, the first stresses received by the PD-1, PD-2, PD-3, PD-4, and PD-5 increase in the third direction Z. It indicates that the direction of the second stress received by the entire biometric detection area 200 is the third direction Z and is the direction of squeezing the display panel. The user's finger has a tendency to exert force towards the display panel in the Figure 14 view direction shown, and the display screen can be adjusted according to this tendency.

[0132] As Figures 1 to 16 shown, an embodiment of the first aspect of the present application further provides a display panel, including: an identification unit 10 for obtaining a biometric detection area 200, where the biometric detection area 200 includes two or more sub-areas 210; an acquisition unit 20 for obtaining the first induction information of each sub-area 210 at the first moment and the second induction information at the second moment; a first stress calculation unit 30 for determining the first stress change information of the sub-area 210 according to the first induction information and the second induction information of each sub-area 210; and a second stress calculation unit 40 for determining the second stress change information of the biometric detection area 200 according to the first stress change information of two or more sub-areas 210.

[0133] In the display panel provided in the embodiment of the present application, the display panel includes an identification unit 10, an acquisition unit 20, a first stress calculation unit 30, and a second stress calculation unit 40. The identification unit 10 can acquire a biometric detection area 200. The acquisition unit 20 can acquire first sensing information of each sub-area 210 in the biometric detection area 200 at a first moment and second sensing information at a second moment. The first stress calculation unit 30 can determine first stress change information of the sub-area 210 according to the first sensing information and the second sensing information of each sub-area 210, that is, the first stress calculation unit 30 can determine the force condition of each sub-area 210 itself. The second stress calculation unit 40 can determine second stress change information of the biometric detection area 200 according to the first stress change information of two or more sub-areas 210, that is, the second stress calculation unit 40 can determine the force condition of the entire biometric detection area 200 according to the force conditions of multiple sub-areas 210. Therefore, the display panel provided in the embodiment of the present application can not only achieve a display effect, but also obtain the force effect of the biometric detection area 200 on the display panel, thereby facilitating the controller of the display device to implement various functions according to the force effect, and improving the service performance of the display panel.

[0134] For the setting manners of the identification unit 10, the acquisition unit 20, the first stress calculation unit 30, and the second stress calculation unit 40, reference may be made to the above text, and details will not be repeated here.

[0135] For example, referring to the above text, the second stress change information includes the change of the second stress received by the biometric detection area 200 in the side-by-side direction of two adjacent sub-areas 210. Then, the first stress change information includes information on the increase and / or decrease of the first stress received by the sub-area 210. The second stress calculation unit 40 is further configured to, when the first stress of one of two adjacent sub-areas 210 increases and the first stress of the other decreases, determine that the direction of the second stress is from the sub-area 210 with the decreasing first stress to the sub-area 210 with the increasing first stress.

[0136] Optionally, the display panels of any of the above first aspect embodiments can be cross-referenced with each other. For example, the display panel of the embodiment of the present application may include the above-mentioned light-emitting sub-pixels 110 and photosensitive sub-pixels 120, etc.

[0137] As Figure 19 shown, the embodiment of the second aspect of the present application further provides a method for detecting the stress of a display panel. The display panel may be the display panel provided in any of the above first aspect embodiments. For example, the display panel includes a sub-pixel unit 100, and the sub-pixel unit 100 includes a light-emitting sub-pixel 110 and a photosensitive sub-pixel 120. The light-emitting sub-pixel 110 is configured to emit light, and the photosensitive sub-pixel 120 is configured to sense light information. Please refer to Figures 1 to 19, the stress detection method of the display panel includes:

[0138] Step S01: Obtain the biometric detection area 200.

[0139] Step S02: Divide the biometric detection area 200 into two or more sub-areas 210, and the sub-areas 210 at least include photosensitive sub-pixels 120.

[0140] Step S03: Obtain the photosensitive information of the photosensitive sub-pixels 120 in the sub-areas 210, and determine the first photosensitive information at the first moment and the second photosensitive information at the second moment of each sub-area 210 according to the photosensitive information.

[0141] Step S04: Determine the first stress change information of the sub-areas 210 according to the first photosensitive information and the second photosensitive information of the sub-areas 210.

[0142] In the stress detection method of the display panel provided in the embodiment of the present application, first, the position of the biometric detection area 200 can be determined through step S01, then the biometric detection area 200 is divided into multiple sub-areas 210, then the photosensitive information of each sub-area 210 is obtained, and finally, the first stress change information of each sub-area 210 can be determined according to the photosensitive information, so as to accurately detect the stress condition of the display panel, so as to adjust the display screen of the display panel according to the stress of the display panel, etc.

[0143] In some alternative embodiments, as Figure 20 shown, the stress detection method of the display panel further includes:

[0144] Step S05: Determine the second stress change information of the biometric detection area 200 according to the first stress change information of two adjacent sub-areas 210, and the second stress change information includes the change of the second stress received by the biometric detection area 200 in the side-by-side direction of two adjacent sub-areas 210.

[0145] In these alternative embodiments, the change of the second stress received by the entire biometric detection area 200 can also be determined according to the first stress received by two adjacent sub-areas 210.

[0146] For example, the first stress change information includes information on the increase and / or decrease of the first stress received by the sub-area 210. In step S05, when one of the two adjacent sub-areas 210 has an increase in the first stress and the other has a decrease in the first stress, it is determined that the direction of the second stress is from the sub-area 210 with a decrease in the first stress to the sub-area 210 with an increase in the first stress; or, when the first stress changes of multiple sub-areas 210 are the same, it is determined that the direction of the second stress is the third direction Z, and the third direction Z is perpendicular to the display surface of the display panel.

[0147] Optionally, at least two sub-regions 210 are distributed along the first direction X. In step S05, the change of the second stress in the first direction X is determined according to the first stress change information of at least two sub-regions 210 distributed along the first direction X. And / or, at least two sub-regions 210 are distributed along the second direction Y. In step S05, the change of the second stress in the second direction Y is determined according to the first stress change information of at least two sub-regions 210 distributed along the second direction Y.

[0148] In the embodiment of the present application, when two sub-regions 210 are distributed along the first direction X, the change of the second stress in the first direction X can be determined. When two sub-regions 210 are distributed along the second direction Y, the change of the second stress in the second direction Y can be determined.

[0149] Optionally, referring to the above, when multiple sub-regions 210 are distributed in an n-row and m-column pattern along the first direction X and the second direction Y, where n and m are positive integers greater than or equal to 2, the first direction X is the row direction, and the second direction Y is the column direction, the n-row and m-column sub-regions 210 form m first sub-region groups distributed along the first direction X, and each first sub-region group includes n sub-regions 210 distributed along the second direction Y. In step S04, the first stress change information of at least two sub-regions 210 distributed along the second direction Y within each first sub-region group can be obtained. In step S05, the change of the second stress in the second direction Y can be determined according to the first stress change information of each first sub-region group. And / or, the n-row and m-column sub-regions 210 form n second sub-region groups distributed along the second direction Y, and the second sub-region group includes m sub-regions 210 distributed along the first direction X. In step S04, the first stress change information of at least two sub-regions 210 distributed along the first direction X within each second sub-region group can be obtained, and in step S05, the change of the second stress in the first direction X can be determined according to the first stress change information of each second sub-region group. To improve the accuracy of the stress detection result.

[0150] Alternatively, in some other alternative embodiments, when multiple sub-regions 210 include a central sub-region 211, a first sub-region 212 located on one side of the central sub-region 211 in the first direction X, and a second sub-region 213 located on the second direction Y of the central sub-region 211, the first stress change information of the central sub-region 211 and the first sub-region 212 can be obtained in step S04. In step S05, the change of the second stress in the first direction X can be determined according to the first stress change information of the central sub-region 211 and the first sub-region 212, and / or, the first stress change information of the central sub-region 211 and the second sub-region 213 can be obtained in step S04; in step S05, the change of the second stress in the second direction Y can be determined according to the first stress change information of the central sub-region 211 and the second sub-region 213. To improve the accuracy of the stress detection result.

[0151] In step S05, when the first stress of multiple sub-regions 210 all decreases, it is determined that the second stress decreases in the third direction Z; and / or, when the stress calculation unit is further configured to determine that the second stress increases in the third direction Z when the first stress of multiple sub-regions 210 all increases. That is, the orientation of the second stress in the third direction Z can also be detected in step S05.

[0152] There are various ways to obtain the first stress change information in step S04. For example, in step S04, the pulse wave data of each sub-region 210 can be determined according to the induced light information, and the first stress change information of each sub-region 210 can be determined according to the pulse wave data. Without an external device, the pulse wave data of each sub-region 210 can be directly determined according to the induced light information, and the first stress change information of each sub-region 210 can be determined according to the pulse wave data.

[0153] Optionally, in step S04, the first stress change information can be determined according to the change of the alternating current signal and / or direct current signal of the pulse wave data of each sub-region 210. For example, when the alternating current signal of the sub-region 210 decreases with time, it is determined that the first stress of the sub-region 210 increases. And / or, when the direct current signal of the sub-region 210 increases with time, it is determined that the first stress of the sub-region 210 increases. Or, when the alternating current signal of the sub-region 210 increases with time, it is determined that the first stress of the sub-region 210 decreases; and / or, when the direct current signal of the sub-region 210 decreases with time, it is determined that the first stress of the sub-region 210 decreases.

[0154] In step S03, the photosensitive sub-pixels 120 located within the biometric detection area 200 can be used to obtain the first light information and the second photosensitive information, so as to improve the accuracy of the detection result. For example, the sub-area 210 includes the light-emitting sub-pixels 110. In step S03, when the light-emitting sub-pixels 110 within the biometric detection area 200 are turned off and at least one light-emitting sub-pixel 110 on the peripheral side of the biometric detection area 200 is turned on, the photosensitive sub-pixels 120 within the biometric detection area 200 are used to obtain the reflected light information of the light emitted by at least one light-emitting sub-pixel 110, so as to further improve the accuracy of the detection result.

[0155] Optionally, the light emitted by the light-emitting sub-pixels 110 is intermittent light, and the light-emitting sub-pixels 110 do not emit light in the first time period and emit light in the second time period. In step S03, the first light information in the first time period and the second light information in the second time period can be obtained, and the ambient light can be filtered according to the first light information and the second light information to determine the actual sensed light information, and the first photosensitive information at the first moment and the second photosensitive information at the second moment can be determined according to the actual sensed light information. This can improve the influence of ambient light on the detection result and further improve the accuracy of the detection result.

[0156] In some other alternative embodiments, the display panel further includes a light filtering structure 300. The light filtering structure 300 includes a first color filter unit 310 and a second color filter unit 320. The photosensitive sub-pixels 120 are used to obtain the first color light information and the second color light information. In step S03, the first color light intensity in the ambient light can be determined according to the second color light information, and the actual sensed light information can be determined according to the first color light information and the first color light intensity in the ambient light. This can improve the influence of ambient light on the detection result and further improve the accuracy of the detection result.

[0157] There are various ways to obtain the first color light information and the second color light information. For example, optionally, the light-emitting sub-pixels 110 include first color sub-pixels and other color sub-pixels, and the photosensitive sub-pixels 120 include first photosensitive sub-pixels 120 and second photosensitive sub-pixels 120.

[0158] Optionally, the first photosensitive sub-pixels 120 are used to obtain the first color light information, and the second photosensitive sub-pixels 120 are used to obtain the second color light information. In step S03, when the first color sub-pixels emit light and the other color sub-pixels are turned off, the second color light intensity in the ambient light is determined according to the second color light information and the first color light intensity in the ambient light is determined, and the first color actual sensed light information is determined according to the first color light information and the first color light intensity in the ambient light, so as to further improve the accuracy of the detection result.

[0159] Alternatively, in some other alternative embodiments, the first color filter unit 310 is correspondingly disposed with the first photosensitive sub-pixel 120, the second color filter unit 320 is correspondingly disposed with the second photosensitive sub-pixel 120, the first photosensitive sub-pixel 120 and the second photosensitive sub-pixel 120 are both configured to sense first color light information and second color light information, the first photosensitive sub-pixel 120 is used to obtain the first color light information via the first filter unit, and the second photosensitive sub-pixel 120 is used to obtain the second color light information via the second filter unit. At this time, in step S03, when the first color sub-pixel emits light and other color sub-pixels are turned off, the second color light intensity in the ambient light is determined according to the second color light information, and the first color light intensity in the ambient light is determined. The first color actual sensed light information is determined according to the first color light information and the first color light intensity in the ambient light, further improving the accuracy of the detection result.

[0160] Although the present application has been described with reference to the preferred embodiments, various modifications can be made thereto and components thereof can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that, Comprising: Sub-pixel units, including light-emitting sub-pixels and photosensitive sub-pixels, where the light-emitting sub-pixels are used for emitting light, and the photosensitive sub-pixels are used for acquiring sensing light information; An identification unit, configured to acquire a biometric detection area, where the biometric detection area includes two or more sub-areas, and the sub-areas at least include the photosensitive sub-pixels; An acquisition unit, configured to determine first photosensitive information at a first moment and second photosensitive information at a second moment of each of the sub-areas according to the sensing light information; A first stress calculation unit, configured to determine first stress change information of the sub-areas according to the first photosensitive information and the second photosensitive information of the sub-areas.

2. The display panel according to claim 1, wherein Further comprising: A second stress calculation unit, which is further configured to determine second stress change information of the biometric detection area according to the first stress change information of two adjacent sub-areas; Preferably, the display panel further includes a control unit, and the control unit is further configured to output a control instruction according to the second stress change information; Preferably, the second stress change information includes the change of the second stress received by the biometric detection area in the side-by-side direction of two adjacent sub-areas; Preferably, the first stress change information includes information on the increase and / or decrease of the first stress received by the sub-areas, and the second stress calculation unit is further configured to, when the first stress of one of two adjacent sub-areas increases and the first stress of the other decreases, determine that the direction of the second stress is from the sub-area with the decreasing first stress to the sub-area with the increasing first stress; Preferably, the direction of the first stress is perpendicular to the display surface of the display panel; Preferably, at least two of the sub-areas are distributed in a first direction, and the second stress calculation unit is further configured to determine the change of the second stress in the first direction according to the first stress change information of at least two of the sub-areas distributed in the first direction; and / or, at least two of the sub-areas are distributed in a second direction, and the second stress calculation unit is further configured to determine the change of the second stress in the second direction according to the first stress change information of at least two of the sub-areas distributed in the second direction; Preferably, the direction of the first stress is a third direction, and the third direction intersects with the first direction and the second direction pairwise; Preferably, a plurality of the sub-areas are distributed in an n-row and m-column manner in the first direction and the second direction, where n and m are both positive integers greater than or equal to 2, the first direction is the row direction, and the second direction is the column direction; Preferably, the n-row and m-column sub-areas form m first sub-area groups distributed in the first direction, each of the first sub-area groups includes n sub-areas distributed in the second direction, the first stress calculation unit is further configured to acquire the first stress change information of at least two of the sub-areas distributed in the second direction within each of the first sub-area groups, and the second stress calculation unit is further configured to determine the change of the second stress in the second direction according to the first stress change information of each of the first sub-area groups; And / or, n×m sub-regions form n second sub-region groups distributed along the second direction, each second sub-region group includes m sub-regions distributed along the first direction, the first stress calculation unit is further configured to obtain first stress change information of at least two sub-regions distributed along the first direction within each second sub-region group, and the second stress calculation unit is further configured to determine the change of the second stress in the first direction according to the first stress change information of each second sub-region group; Preferably, the multiple sub-regions include a central sub-region, a first sub-region located on at least one side of the central sub-region in the first direction, and a second sub-region located on at least one side of the central sub-region in the second direction; The first stress calculation unit is further configured to obtain first stress change information of the central sub-region and the first sub-region; The second stress calculation unit is further configured to determine the change of the second stress in the first direction according to the first stress change information of the central sub-region and the first sub-region, and / or, the first stress calculation unit is further configured to obtain first stress change information of the central sub-region and the second sub-region; The second stress calculation unit is further configured to determine the change of the second stress in the second direction according to the first stress change information of the central sub-region and the second sub-region.

3. The display panel according to claim 2, wherein The second stress calculation unit is further configured to, when the first stress changes of the multiple sub-regions are the same, determine that the direction of the second stress is the third direction, and the third direction is perpendicular to the display surface of the display panel; Preferably, the second stress calculation unit is further configured to, when the first stress of the multiple sub-regions all decreases, determine that the second stress decreases in the third direction; and / or, when the stress calculation unit is further configured to, when the first stress of the multiple sub-regions all increases, determine that the second stress increases in the third direction.

4. The display panel according to claim 1, wherein The first stress calculation unit is configured to determine the pulse wave data of each sub-region according to the sensed light information, and determine the first stress change information of each sub-region according to the pulse wave data; Preferably, the first stress calculation unit is configured to determine the first stress change information according to the change of the alternating current signal and / or the direct current signal of the pulse wave data of each sub-region; Preferably, the first stress calculation unit is configured to, when the alternating current signal of the sub-region decreases with time, determine that the first stress of the sub-region increases; and / or, the first stress calculation unit is configured to, when the direct current signal of the sub-region increases with time, determine that the first stress of the sub-region increases; Preferably, the first stress calculation unit is configured to, when the alternating current signal of the sub-region increases with time, determine that the first stress of the sub-region decreases; and / or, the first stress calculation unit is configured to, when the direct current signal of the sub-region decreases with time, determine that the first stress of the sub-region decreases.

5. The display panel according to claim 1, wherein The acquisition unit is configured to acquire the first photosensitive information and the second photosensitive information by using the photosensitive sub-pixels located in the biometric detection area; Preferably, the sub-region includes the light-emitting sub-pixel, and the obtaining unit is configured to, when the light-emitting sub-pixel in the biometric detection region is turned off and at least one light-emitting sub-pixel located on the periphery of the biometric detection region is turned on, obtain the reflected light information of the light emitted by at least one light-emitting sub-pixel by using the photosensitive sub-pixel in the biometric detection region.

6. The display panel according to claim 1, wherein The light emitted by the light-emitting sub-pixel is intermittent light, and the light-emitting sub-pixel does not emit light in a first time period and emits light in a second time period. The obtaining unit is configured to obtain first light information in the first time period and second light information in the second time period, and filter ambient light according to the first light information and the second light information to determine actual sensed light information.

7. The display panel according to claim 1, wherein the display panel further includes a light filtering structure, and the light filtering structure includes a first color filter unit and a second color filter unit; the photosensitive sub-pixel includes a first photosensitive sub-pixel and a second photosensitive sub-pixel, the first color filter unit and the first photosensitive sub-pixel are correspondingly arranged, the second color filter unit and the second photosensitive sub-pixel are correspondingly arranged, the first photosensitive sub-pixel is configured to obtain first color light information, the second photosensitive sub-pixel is configured to obtain second color light information, or both the first photosensitive sub-pixel and the second photosensitive sub-pixel are configured to sense first color light information and second color light information, the first photosensitive sub-pixel is configured to obtain first color light information passing through the first color filter unit, and the second photosensitive sub-pixel is configured to obtain second color light information passing through the second color filter unit; the light-emitting sub-pixel includes a first color photon sub-pixel and other color photon sub-pixels, and the obtaining unit is further configured to, when the first color photon sub-pixel is turned on and other color photon sub-pixels are turned off, determine the second color light intensity in the ambient light and determine the first color light intensity in the ambient light according to the second color light information, and determine the first color actual sensed light information according to the first color light information and the first color light intensity in the ambient light.

8. The display panel according to claim 1, wherein The recognition unit includes: a first recognition sub-unit, configured to obtain the current touch operation position information of the user; a second recognition sub-unit, configured to determine a biometric detection region according to the current touch operation position information; and / or, the display panel further includes a control unit, and the control unit is configured to output a control instruction according to the first stress change information.

9. A display panel, characterized in that, including: a recognition unit, configured to obtain a biometric detection region, and the biometric detection region includes two or more sub-regions; an obtaining unit, configured to obtain first sensing information of each sub-region at a first moment and second sensing information of each sub-region at a second moment; a first stress calculation unit, configured to determine first stress change information of the sub-region according to the first sensing information and the second sensing information of each sub-region; a second stress calculation unit, configured to determine second stress change information of the biometric detection region according to the first stress change information of two or more sub-regions.

10. The display panel according to claim 9, wherein The second stress change information includes the change of the second stress received by the biometric detection area in the side-by-side direction of two adjacent sub-areas; Preferably, the first stress change information includes information on the increase and / or decrease of the first stress received by the sub-area, and the second stress calculation unit is further configured to, when the first stress of one of two adjacent sub-areas increases and the first stress of the other sub-area decreases, determine that the direction of the second stress is from the sub-area with the decreasing first stress to the sub-area with the increasing first stress.

11. The display panel according to claim 9, wherein The display panel further includes photosensitive sub-pixels and light-emitting sub-pixels. At least one photosensitive sub-pixel is provided in each sub-area. The photosensitive sub-pixel is configured to obtain photosensitive information. The first sensing information includes first photosensitive information, and the second sensing information includes second photosensitive information.

12. A method for detecting stress of a display panel, characterized in that, The display panel includes a sub-pixel unit. The sub-pixel unit includes a light-emitting sub-pixel and a photosensitive sub-pixel. The light-emitting sub-pixel is configured to emit light, and the photosensitive sub-pixel is configured to sense optical information. The stress detection method of the display panel includes: Obtain a biometric detection area; Divide the biometric detection area into two or more sub-areas, and the sub-areas at least include the photosensitive sub-pixels; Obtain the photosensitive information of the photosensitive sub-pixels in the sub-areas, and determine the first photosensitive information at the first moment and the second photosensitive information at the second moment of each sub-area according to the photosensitive information; Determine the first stress change information of the sub-area according to the first photosensitive information and the second photosensitive information of the sub-area.

13. The stress detection method according to claim 12, wherein, It further includes: Determine the second stress change information of the biometric detection area according to the first stress change information of two adjacent sub-areas. The second stress change information includes the change of the second stress received by the biometric detection area in the side-by-side direction of two adjacent sub-areas; Preferably, the first stress change information includes information on the increase and / or decrease of the first stress received by the sub-area, In the step of determining the second stress change information of the biometric detection area according to the first stress change information of two adjacent sub-areas: when the first stress of one of two adjacent sub-areas increases and the first stress of the other sub-area decreases, determine that the direction of the second stress is from the sub-area with the decreasing first stress to the sub-area with the increasing first stress; Alternatively, when the first stress changes of the multiple sub-areas are the same, determine that the direction of the second stress is a third direction, and the third direction is perpendicular to the display surface of the display panel.

14. A display device, characterized in that, The display device includes the display panel according to any one of claims 1-11, or the display device includes the display panel detected by using the stress detection method in claims 12-13.

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