Display panel, preparation method thereof and display device

Abstract

Embodiments of the present disclosure provide a display panel, a preparation method thereof and a display device. The display panel comprises a display area and a photosensitive area. In the photosensitive area, the display panel comprises a display structure layer, a functional layer located on a side of the display structure layer away from the display, and a photosensitive device layer located on a side of the functional layer away from the display structure layer. The photosensitive device layer is provided with a photosensitive device. The functional layer is provided with a photosensitive opening hole corresponding to the photosensitive device. A photosensitive compensation device is arranged on a side of the photosensitive opening hole close to the display structure layer. The photosensitive compensation device is used to change the light path of light rays emitted by the display structure layer towards the photosensitive device, so that the photosensitive area of the photosensitive device can receive light rays.

Description

TECHNICAL FIELD

[0001] The embodiment of the present disclosure relates to, but is not limited to, the technical field of display, in particular to a display panel, a preparation method thereof and a display device. BACKGROUND

[0002] An organic light emitting diode (OLED) is an active light emitting display device, which has the advantages of self-emission, wide viewing angle, high contrast, low power consumption, extremely high response speed, thinness, flexibility and low cost. With the continuous development of display technology, the display device with OLED as the light emitting device and controlled by a thin film transistor (TFT) has become the mainstream product in the current display field, and has been widely used in mobile phones, computers, televisions, vehicles, smart wearable devices and other fields.

[0003] With the rapid development of consumer electronics, in life, there is usually such an actual life experience that when the external environment light is relatively dark, the mobile phone and wearable device will automatically adjust to a low brightness mode to adapt to the environment, and when the ambient light is relatively high, it will automatically adjust to a high brightness mode to ensure that the human eye can clearly obtain and perceive the screen display information. The sensing of the brightness of the light mainly depends on the work of the photosensitive sensor, which is used to sense the light intensity and feedback to the display device to automatically adjust the screen brightness to achieve the purpose of energy saving. SUMMARY

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] The technical problem to be solved by the exemplary embodiments of the present disclosure is to provide a display panel, a preparation method thereof and a display device to solve the problem of deviation in the photosensitive result of the existing photosensitive device.

[0006] In one aspect, the exemplary embodiments of the present disclosure provide a display panel, comprising a display area and a photosensitive area, in the photosensitive area, in a direction perpendicular to the display panel, the display panel comprises a display structure layer, a functional layer located on a side of the display structure layer away from the display, and a photosensitive device layer located on a side of the functional layer away from the display structure layer; the photosensitive device layer is provided with a photosensitive device, the functional layer is provided with a photosensitive opening hole corresponding to the photosensitive device, and a photosensitive compensation device is arranged on a side of the photosensitive opening hole close to the display structure layer; the photosensitive compensation device is used to change the light path of the light rays emitted by the display structure layer to the photosensitive device, so that the photosensitive area of the photosensitive device can receive the light rays.

[0007] In another aspect, the exemplary embodiments of the present disclosure also provide a display device comprising the display panel.

[0008] In another aspect, the exemplary embodiments of the present disclosure provide a method for manufacturing a display panel, the display panel comprising a display area and a light sensing area, the method comprising:

[0009] forming a functional layer on a side of the display structure layer away from the display;

[0010] forming a light sensing opening in the functional layer in the light sensing area;

[0011] disposing a light sensing compensation device on a side of the light sensing opening close to the display structure layer, the light sensing compensation device being configured to change a light path of light rays passing through the display structure layer and directed to the light sensing device, so that the light sensing device can receive light rays in a light sensing area;

[0012] forming a light sensing device layer on a side of the functional layer away from the display structure layer, the light sensing device layer being provided with a light sensing device corresponding to the light sensing opening.

[0013] The exemplary embodiments of the present disclosure provide a display panel, a method for manufacturing the display panel, and a display device. By disposing the light sensing compensation device, the light path of light rays directed to the light sensing sensor can be changed, so that the light sensing sensor can receive sufficient light rays, and the display panel can truly reflect the current light intensity even when the display panel is tilted, so that the screen brightness can be controlled at a proper level, and the light sensing compensation at a tilt angle can be achieved.

[0014] Other aspects can become apparent from the following detailed description when read in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the technical solutions of the present disclosure, and constitute a part of the specification, and are used to explain the technical solutions of the present disclosure together with the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions of the present disclosure. The shapes and sizes of the components in the drawings do not reflect true proportions, and the purpose is only to schematically illustrate the present disclosure.

[0016] Figure 1 FIG. 1 is a structural schematic diagram of a display device;

[0017] Figure 2 FIG. 2 is a partial planar structural schematic diagram of a display panel;

[0018] Figure 3 FIG. 3 is a side view of the display panel; Figure 2

[0019] Figure 4a FIG. 5 is a schematic diagram of a propagation path of light rays vertically incident on a light sensing area; ​

[0020] Figure 4b A schematic diagram of the propagation path of light rays obliquely incident on the photosensitive region;

[0021] Figure 5 A schematic diagram of a display panel structure according to an embodiment of the present disclosure;

[0022] Figure 6a A schematic diagram of the light path after the photosensitive compensation device is provided according to an embodiment of the present disclosure;

[0023] Figure 6b A schematic diagram of another photosensitive compensation device according to an embodiment of the present disclosure;

[0024] Figure 7 A schematic diagram of another photosensitive compensation device according to an embodiment of the present disclosure;

[0025] Figure 8a A light path diagram of light rays less than 30° incident on the photosensitive compensation device;

[0026] Figure 8b A light path diagram of light rays 30° incident on the photosensitive compensation device;

[0027] Figure 9a A schematic diagram of a photosensitive compensation device provided with a boss area according to an embodiment of the present disclosure;

[0028] Figure 9b A schematic diagram of another photosensitive compensation device according to an embodiment of the present disclosure;

[0029] Figure 10a A light path diagram of light rays vertically incident on the photosensitive compensation device shown; Figure 9a A light path diagram of light rays vertically incident on the photosensitive compensation device shown;

[0030] Figure 10b A light path diagram of light rays obliquely incident on the photosensitive compensation device shown; Figure 9a A light path diagram of light rays obliquely incident on the photosensitive compensation device shown. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the following will describe the embodiments of the present disclosure in detail with reference to the drawings. It should be noted that the embodiments can be implemented in many different forms. Those skilled in the art can easily understand that the manners and contents can be changed into various forms without departing from the purpose of the present disclosure and the scope thereof. Therefore, the present disclosure should not be interpreted as being limited to the contents described in the following embodiments. The embodiments in the present disclosure and the features in the embodiments can be combined with each other arbitrarily without conflict. In order to keep the following description of the embodiments of the present disclosure clear and brief, the present disclosure omits the detailed description of some known functions and known components. The drawings of the embodiments of the present disclosure only involve the structures related to the present disclosure, and other structures can be referred to the general design

[0032] The scale of the drawings in this disclosure can be used as a reference in an actual process, but is not limited thereto. For example, the width-length ratio of the channel, the thickness and interval of each film layer, and the width and interval of each signal line can be adjusted as needed. The number of pixels in the display panel and the number of sub-pixels in each pixel are not limited to the number shown in the drawings. The drawings described in this disclosure are only schematic diagrams, and one embodiment of this disclosure is not limited to the shapes or values shown in the drawings.

[0033] In this specification, ordinal numbers such as "first", "second", "third", and the like are used to avoid confusion of components, and are not intended to limit in terms of numbers.

[0034] In this specification, words of "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like that indicate the orientation or positional relationship are used to describe the positional relationship of the components with reference to the drawings, and are only used for convenience of this specification and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure. The positional relationship of the components is appropriately changed according to the direction of describing each component. Therefore, it is not limited to the words described in the specification, and can be appropriately changed according to the situation.

[0035] In this specification, unless explicitly defined and limited otherwise, the terms "mount", "connected", "connected" should be broadly understood. For example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate, or communication between two elements. For those skilled in the art, the specific meaning of the above terms in this disclosure can be understood according to the specific circumstances.

[0036] In this specification, a transistor refers to an element including at least a gate electrode, a drain electrode, and a source electrode. The transistor has a channel region between the drain electrode (drain electrode terminal, drain region, or drain electrode) and the source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, the channel region refers to a region where current mainly flows.

[0037] In this specification, the first electrode can be a drain electrode, and the second electrode can be a source electrode, or the first electrode can be a source electrode, and the second electrode can be a drain electrode. In the case of using a transistor with opposite polarity or in the case of changing the direction of current in the circuit operation, the functions of "source electrode" and "drain electrode" are sometimes exchanged with each other. Therefore, in this specification, "source electrode" and "drain electrode" can be exchanged with each other.

[0038] In the present specification, "electrically connected" includes a case where components are connected together through an element having some electrical action. The element having some electrical action is not particularly limited as long as it can perform transmission and reception of an electrical signal between the components to be connected. Examples of the element having some electrical action include not only an electrode and a wiring but also a switching element such as a transistor, a resistor, an inductor, a capacitor, and another element having some function.

[0039] In the present specification, "parallel" means a state where an angle formed by two straight lines is greater than or equal to -10° and less than or equal to 10°, and thus, a state where the angle is greater than or equal to -5° and less than or equal to 5° is also included. In addition, "perpendicular" means a state where an angle formed by two straight lines is greater than or equal to 80° and less than or equal to 100°, and thus, a state where the angle is greater than or equal to 85° and less than or equal to 95° is also included.

[0040] In the present specification, "film" and "layer" can be interchanged with each other. For example, "a conductive layer" can be replaced with "a conductive film". Similarly, "an insulating film" can be replaced with "an insulating layer".

[0041] In the present specification, a triangle, a rectangle, a trapezoid, a pentagon, or a hexagon is not strictly a triangle, a rectangle, a trapezoid, a pentagon, or a hexagon, and can be an approximately triangle, a rectangle, a trapezoid, a pentagon, or a hexagon, and can include some small deformation due to a tolerance, can include a rounded corner, a rounded side, and deformation, and the like.

[0042] "About" in the present disclosure means not strictly limited to a limit, and allows a value within a range of process and measurement error.

[0043] Figure 1 A structure diagram of a display device. As Figure 1As shown, the display device can include a timing controller, a data driver, a scan driver, a light emitting driver, and a pixel array, the timing controller connected to the data driver, the scan driver, and the light emitting driver, respectively, the data driver connected to a plurality of data signal lines (D1 to Dn), respectively, the scan driver connected to a plurality of scan signal lines (S1 to Sm), respectively, the light emitting driver connected to a plurality of light emitting signal lines (E1 to Eo), respectively. The pixel array can include a plurality of sub-pixels Pxij, i and j can be natural numbers, at least one sub-pixel Pxij can include a circuit unit and a light emitting device connected to the circuit unit, the circuit unit can include at least one scan signal line, at least one data signal line, at least one light emitting signal line, and a pixel driving circuit. In an exemplary embodiment, the timing controller can provide a gray scale value and a control signal suitable for the specification of the data driver to the data driver, can provide a clock signal, a scan start signal, and the like suitable for the specification of the scan driver to the scan driver, and can provide a clock signal, an emission stop signal, and the like suitable for the specification of the light emitting driver to the light emitting driver. The data driver can generate data voltages to be provided to the data signal lines D1, D2, D3, …, and Dn using the gray scale value and the control signal received from the timing controller. For example, the data driver can sample the gray scale value using the clock signal, and apply data voltages corresponding to the gray scale value to the data signal lines D1 to Dn in units of a pixel row. n can be a natural number. The scan driver can generate scan signals to be provided to the scan signal lines S1, S2, S3, …, and Sm by receiving the clock signal, the scan start signal, and the like from the timing controller. For example, the scan driver can sequentially provide the scan signal having an on-level pulse to the scan signal lines S1 to Sm. For example, the scan driver can be configured in the form of a shift register, and can generate the scan signal in such a manner that the scan start signal provided in the form of an on-level pulse is sequentially transferred to a next stage circuit under the control of the clock signal. m can be a natural number. The light emitting driver can generate emission signals to be provided to the light emitting signal lines E1, E2, E3, …, and Eo by receiving the clock signal, the emission stop signal, and the like from the timing controller. For example, the light emitting driver can sequentially provide the emission signal having an off-level pulse to the light emitting signal lines E1 to Eo. For example, the light emitting driver can be configured in the form of a shift register, and can generate the emission signal in such a manner that the emission stop signal provided in the form of an off-level pulse is sequentially transferred to a next stage circuit under the control of the clock signal. o can be a natural number.

[0044] For products like smart terminals, hardware such as light sensors is typically required to detect light intensity and automatically adjust screen brightness. The inventors discovered that in real life, users' handheld smart display terminals are not always held horizontally. Especially for wearable products, the screen is often tilted at a certain angle to the horizontal for better viewing. This common user habit often causes ambient light to enter the sensor's light-sensitive area at an angle, reducing the sensor's ability to judge ambient light intensity. Ultimately, this leads to deviations in the display module's brightness adjustment, such as insufficient screen brightness.

[0045] Figure 2 This is a schematic diagram of a partial planar structure of a display panel. Figure 3 for Figure 2 The side view of the central display panel. (Example) Figure 2 and Figure 3 As shown, the display panel may include at least a display area 110 and a photosensitive area 120. Figure 2 (The location of the photosensitive area is for illustrative purposes only). The photosensitive area 120 is the area where the photosensitive sensor 300 is exposed to light. The photosensitive sensor 300 is located on the side of the display panel 100 away from the display. A functional layer, such as a flexible printed circuit (FPC) 210, is also provided between the photosensitive sensor 300 and the display panel.

[0046] Figure 4a This is a schematic diagram of the propagation path of light rays incident perpendicularly on the photosensitive area. Figure 4b This is a schematic diagram of the propagation path of light incident obliquely on the photosensitive area. Figure 4a and Figure 4b The diagram also shows a buffer layer 220 between the FPC210 and the display structure layer 100, and a pad 310 between the FPC210 and the photosensor 300. Figure 4a and Figure 4b As shown, the photosensor 300 is mounted on the back of the display panel, away from the display structure layer 100. To allow light to enter the photosensitive area 320 of the photosensor 300, an opening is required between the photosensor 300 and the display structure layer 100. This design limits the angle of incident light from the opening. Consequently, ambient light at different incident angles overlaps with the photosensitive area of ​​the photosensor in varying sizes after passing through the opening. In other words, incident light at different angles will create shadow areas of different sizes on the photosensor. Figure 4bAs shown. This means that under certain circumstances, the light-sensing area of ​​the photosensor is small, and when oblique light is incident, a considerable area of ​​shadow 330 exists in the photosensitive area 320 of the photosensor. Obviously, this area cannot perform light detection, and ultimately, it will have a serious deviation in reflecting the true intensity of the external ambient light, causing the host to adjust the screen too low. Therefore, the ability of the photosensor to accurately acquire the external ambient light is particularly important, as it often determines the precise adjustment of the screen brightness by the integrated circuit IC.

[0047] Therefore, embodiments of this disclosure provide a display panel, such as Figure 5 As shown, the display panel includes a display area 110 and a photosensitive area 120. In the photosensitive area 120, perpendicular to the display panel, the display panel includes a display structure layer 100, a functional layer 200 located on the side of the display structure layer 100 facing away from the display, and a photosensitive device layer located on the side of the functional layer 200 away from the display structure layer 100. The photosensitive device layer is provided with a photosensor 300. The functional layer is provided with a photosensor opening corresponding to the photosensor. A photosensor compensation device 400 is provided within the photosensor opening near the display structure layer. The photosensor compensation device 400 is used to change the optical path of light passing through the display structure layer to the photosensor, so that all photosensitive areas of the photosensor can receive light.

[0048] By setting up a light-sensitive compensation device, the light path of the light rays hitting the light sensor can be changed, so that the light sensor can sense enough light to accurately reflect the current light intensity when the display panel is tilted. This avoids excessively low adjustment of screen brightness and achieves light-sensitive compensation at tilt angles.

[0049] The direction perpendicular to the display panel and the direction perpendicular to the display structure layer, as described in this article, have the same meaning. The direction parallel to the display panel and the direction parallel to the display structure layer have the same meaning.

[0050] In an exemplary embodiment, the photosensitivity compensation device may be a photosensitivity compensation lens, such as a plano-concave mirror.

[0051] In an exemplary embodiment, within the photosensitive area, the functional layer 200 may include a flexible printed circuit board (FPC) layer 210 and a buffer layer 220. The FPC layer 210 is provided with a first photosensitive hole 211, and the buffer layer 220 is provided with a second photosensitive hole 221. The orthographic projection of the first photosensitive hole 211 onto the display area plane may coincide with the orthographic projection of the second photosensitive hole 221 onto the display area plane (e.g., ...). Figure 6a As shown, the first photosensitive aperture 211 and the second photosensitive aperture 221 together form a photosensitive opening. The photosensitive compensation device can be located inside the second photosensitive aperture 221. The photosensitive compensation device can be fixed by snap-fit ​​or adhesive.

[0052] In an exemplary embodiment, such as Figure 6a As shown, on a plane perpendicular to the display panel, the photosensitivity compensation device 400 includes at least a plateau region 410 and a tilt transition region 420. The distance between the plateau region 410 and the photosensitive device is greater than the distance between the tilt transition region 420 and the photosensitive device. In an exemplary embodiment, on a plane perpendicular to the display panel, the plateau region is positioned opposite to the photosensitizing area of ​​the photosensitizer. The tilt transition region 420 may be located on either side of the plateau region 410, such as... Figure 6a As shown, or located on either side of platform area 410, such as Figure 6b As shown in Figure 6 (which illustrates an example where the tilted area 420 is located to the right of the platform area 410; in other embodiments, the tilted transition area may also be located only to the left of the platform area, depending on the position of the photosensitive device in the product), the thickness of the platform area refers to the difference between the distance from the surface furthest from the display structure layer and the distance from the surface closest to the display structure layer. The thickness of the platform area is the same at all points. On a plane perpendicular to the display panel, the thickness of the tilted transition area varies, increasing with distance from the platform area. The thickness of the tilted transition area also refers to the distance between the upper and lower surfaces of the tilted transition area on a plane perpendicular to the display panel, in a direction perpendicular to the display panel.

[0053] Depend on Figure 6a Taking the edge light as an example, when no photosensitive compensation device is set, the light that was originally directed towards point P1 changes its path and is directed towards point P2 after the photosensitive compensation device is set. The photosensitive compensation device changes the propagation path of the obliquely incident light, ensuring that the photosensitive sensor has the ability to detect light over the entire area in this state.

[0054] In an exemplary embodiment, the photosensor is designed to accurately capture ambient light incident at any tilt angle. For example... Figure 7 As shown, on a plane perpendicular to the display panel, the horizontal width of the inclined transition area, i.e., the width of the inclined transition area in the direction parallel to the display panel, is: L2 = H * sinαcosα. The vertical height of the inclined transition area exceeding the platform area, i.e., the height of the inclined transition area exceeding the platform area in the direction perpendicular to the display panel, is: L3 = H * sinαcosα. 2α, wherein, a is the inclination angle of the inclined transition region, which can be the angle between the inclined surface of the inclined transition region and the display panel in a plane perpendicular to the display panel, and H is the distance from the surface of the platform region away from the display structure layer to the surface of the photosensitive sensor close to the display structure layer. The horizontal width refers to the length of the inclined transition region in the direction parallel to the display panel, or the distance from one edge of the platform region to the other edge of the platform region in the direction parallel to the display panel. The vertical height refers to the difference between the maximum height (thickness) and the minimum height (thickness) of the inclined transition region in the direction perpendicular to the display panel. Through the above design, the propagation path of the incident light with an inclination angle θ ∈ (0°, a) can be changed. And it is ensured that the photosensitive sensor can effectively detect the intensity of the inclined light when the light is incident at any inclination angle θ.

[0055] In an example embodiment, to ensure that the photosensitive sensor has the same light sensing amount as the conventional design when the light is incident at a normal angle, the horizontal width of the platform region of the photosensitive compensation device, i.e., the width of the platform region in the direction parallel to the display panel, can be designed to be greater than or equal to the length (width) L1 of the photosensitive region 320 of the photosensitive sensor. As shown in Figure 7 the figure, the width L1 of the concave flat surface of the compensation lens is equal to the width of the photosensitive region 320 of the photosensitive sensor.

[0056] In an example embodiment, based on the actual situation, when the light is incident at an inclination angle of 30° (the angle between the light and the normal line perpendicular to the display panel is 30°) into the photosensitive region, if the photosensitive sensor can accurately collect the ambient light data, the display driving chip can accurately control the brightness of the display panel. Based on the physical optical refraction theory, Figure 8a the figure shows the light path diagram of the incident light A1 with an inclination angle in the range of (0°, 30°) obliquely incident into the photosensitive compensation device. Wherein β1 represents the angle (incident angle) between the light A1 and the normal line of the inclined transition region, and β2 represents the angle (exit angle) between the exit light A2 and the normal line of the inclined transition region. Figure 8b the figure shows the light path diagram when the incident light B1 is incident at an inclination angle θ equal to 30°, at which the normal line is parallel to the incident (exit) light. Through geometric light path analysis, it is found that when the horizontal width of the inclined transition region of the photosensitive compensation device is: the vertical height is: The inclination angle of the inclined transition region: a = 30°. That is, the light rays with an inclination angle of θ ≤ 30° can be fully covered on the photosensitive area of the photosensitive sensor after the oblique incidence of the photosensitive compensation device. In other words, the above design can ensure the effective change of the photosensitive sensor to the propagation path of the oblique incidence light, and finally make the photosensitive sensor have the full-area photosensitive detection capability and accurately detect the intensity of the real environment light.

[0057] In this embodiment, the photosensitive compensation lens is arranged at a position with a height of H from the display structure layer at the opening of the photosensitive sensor to compensate for the photosensitive intensity of the oblique incidence light. Through the special design of the lens edge angle, the triangular structure of the edge protrusion satisfies: side length side length When the acute angle a = 30°, the photosensitive area of the photosensitive sensor can be fully covered by the light when the light is incident at an inclination angle of θ ≤ 30°. Through such a design, the photosensitive sensor can accurately acquire the external environment light, and also provides a feasible solution for accurately adjusting the screen brightness, greatly enhancing the user experience in real-life scenarios.

[0058] In an example embodiment, in the photosensitive area, the functional layer 200 includes a flexible circuit board (FPC) layer 210 and a buffer layer 220, the FPC layer 210 is provided with a first photosensitive hole 211, and the buffer layer 220 is provided with a second photosensitive hole 221. The orthographic projection of the first photosensitive hole 211 on the display area plane is within the range of the orthographic projection of the second photosensitive hole 221 on the display area plane, that is, the edge of the orthographic projection of the second photosensitive hole 221 on the display area plane is located outside the edge of the orthographic projection of the first photosensitive hole 211 on the display area plane. The first photosensitive hole 211 and the second photosensitive hole 221 together form a photosensitive opening. The photosensitive compensation device is located in the second photosensitive hole 221.

[0059] In an example embodiment, the photosensitive compensation device can further include a boss area 430. In a plane perpendicular to the display panel, the boss area 430 is located on the side of the inclined transition region 420 away from the platform area 410. In a direction perpendicular to the display structure layer, the boss area 430 is arranged between the flexible circuit board layer and the display structure layer. As shown in Figure 9a The upper surface of the boss area is adjacent to the flexible circuit board layer, and the lower surface of the boss area is adjacent to the display structure layer.

[0060] In an example embodiment, the horizontal width of the boss area 430, that is, the width of the boss area in the direction parallel to the display structure layer (Wboss), is less than the horizontal width of the inclined transition region 420 (Wtransition). Figure 9aL4) can be the distance between the edge of the second light-sensitive hole 221 orthogonally projected on the display area plane and the edge of the first light-sensitive hole 211 orthogonally projected on the display area plane, and the length of L4 does not exceed the distance (such as L5 in the figure) between the inner wall of the first light-sensitive hole close to the boss area and the edge of the light sensor. The boss area of the FPC layer protruding from the buffer layer and the light compensation device can provide support for the assembly of the light sensor, preventing film printing defects on the display structure layer caused by stress on the sensor pads during FPC bonding. The thickness of the boss area is the maximum thickness of the inclined transition area, and the thickness of the platform area is the minimum thickness of the inclined transition area.

[0061] In the example embodiment, in a plane parallel to the display panel, the shapes of the first light-sensitive hole 211 and the second light-sensitive hole 221 can be any one or more of the following: rectangular, polygonal, circular, and elliptical.

[0062] In the example embodiment, according to the position of the light-sensitive area, the light compensation device can be asymmetrically arranged as shown Figure 9b , and no inclined transition area can be arranged between part of the platform area and the boss area.

[0063] In the example embodiment, in a plane perpendicular to the display panel, the inclined surface of the inclined transition area can be a plane or a curved surface.

[0064] Figure 10a The example embodiment of the present disclosure is shown Figure 9a The light path shown in the scheme is perpendicular to the incident light, and in the case of perpendicular incidence, the example embodiment can ensure that the light intensity is not affected. Figure 10b The light path when the ambient light is obliquely incident is shown Figure 4b The shadow area is significantly reduced, and it can be clearly seen that, due to the arrangement of the light compensation lens, the propagation path of the obliquely incident light is changed, ensuring that the light sensor has full-area light sensing detection capability in this state. Through the structural design of the example embodiment of the present disclosure, compensation for any obliquely incident light, especially obliquely incident light within an angle range of θ ≤ 30°, can be achieved, and precise collection of the intensity of obliquely incident light by the light sensor can be achieved. Therefore, the introduction of the light compensation device enables the originally non-light-sensing shadow area to re-perceive the incidence of external ambient light, realizes light compensation when the light is obliquely incident, and ensures that the display module can accurately adjust the display brightness.

[0065] The example embodiment of the present disclosure also provides a preparation method of a display panel to prepare the display panel of the foregoing example embodiment. In the example embodiment, the display panel includes a display area and a light-sensitive area, and the preparation method includes:

[0066] forming a functional layer on the side of the display structure layer away from the display;

[0067] In the photosensitive region, a photosensitive opening is formed in the functional layer;

[0068] A photosensitive compensation device is arranged in the photosensitive opening close to the display structure layer, and the photosensitive compensation device is used to change the light path of the light rays emitted by the display structure layer to the photosensitive device, so that the photosensitive area of the photosensitive device can receive the light rays.

[0069] A photosensitive device layer is formed on the side of the functional layer away from the display structure layer, and the photosensitive device layer is provided with a photosensitive device corresponding to the photosensitive opening.

[0070] In an example embodiment, the functional layer is formed on the side of the display structure layer away from the display, comprising:

[0071] A buffer layer is formed on the side of the display structure layer away from the display, and a first photosensitive hole is formed in the buffer layer;

[0072] A flexible circuit board layer is formed on the side of the buffer layer away from the display structure layer, and a second photosensitive hole is formed in the flexible circuit board layer, and the orthographic projection of the second photosensitive hole on the display structure layer plane is within the range of the orthographic projection of the first photosensitive hole on the display structure layer plane, and the first photosensitive hole and the second photosensitive hole together constitute the photosensitive opening.

[0073] In an example embodiment, the photosensitive compensation device arranged in the photosensitive opening close to the display structure layer comprises a photosensitive compensation device arranged in the first photosensitive hole of the buffer layer.

[0074] In an example embodiment, the photosensitive compensation device is a flat concave mirror.

[0075] The example embodiments of the present disclosure also provide a display device comprising the aforementioned display panel. The display device of the example embodiments of the present disclosure can be a mobile phone, a tablet computer, a display, a notebook computer, or any product or component having a display function, or can be a smart watch or other wearable device.

[0076] Although the embodiments of the present disclosure are as described above, the content described is only the embodiments adopted for the purpose of facilitating the understanding of the present disclosure, and is not intended to limit the present disclosure. Any person skilled in the art of the present disclosure can make any modification and change in the form and details without departing from the spirit and scope of the present disclosure, but the patent protection scope of the present disclosure shall be subject to the scope defined by the appended claims.

Claims

1. A display panel, characterized in that, include: The display area and the photosensitive area, wherein in the photosensitive area, in a direction perpendicular to the display panel, the display panel includes a display structure layer, a functional layer located on the side of the display structure layer away from the display, and a photosensitive device layer located on the side of the functional layer away from the display structure layer. The photosensitive device layer is provided with a photosensitive device, and the functional layer is provided with a photosensitive opening corresponding to the photosensitive device. A photosensitive compensation device is provided in the photosensitive opening on the side near the display structure layer. The photosensitive compensation device is used to change the light path of the light rays that pass through the display structure layer to the photosensitive device, so that the photosensitive area of ​​the photosensitive device can receive light. The photosensitive compensation device includes a platform area and a tilt transition area. On a plane perpendicular to the display panel, the platform area is disposed opposite to the photosensitive area of ​​the photosensitive device. The tilt transition area is located on either side of the platform area or on any side. The further away from the platform area, the greater the thickness of the tilt transition area. The distance between the platform area and the photosensitive device is greater than the distance between the tilt transition area and the photosensitive device.

2. The display panel according to claim 1, characterized in that, in: On a plane perpendicular to the display panel, the width of the inclined transition area in the direction parallel to the display panel is... The tilted transition area extends beyond the platform area by a height in the direction perpendicular to the display panel. ; in, H is the distance from the surface of the platform region away from the display structure layer to the surface of the photosensitive device close to the display structure layer.

3. The display panel according to claim 1, characterized in that, in: The tilt angle of the tilt transition area is 30°; the width of the tilt transition area in the direction parallel to the display panel is... The tilted transition area extends beyond the platform area in a direction perpendicular to the display panel by a height of [missing information]. Where H is the distance from the surface of the platform region away from the display structure layer to the surface of the photosensitive device close to the display structure layer.

4. The display panel according to claim 1, 2, or 3, characterized in that, in: On a plane perpendicular to the display panel, the width of the platform area in the direction parallel to the display panel is greater than or equal to the width of the photosensitive area of ​​the photosensitive device.

5. The display panel according to claim 1, characterized in that, in: The functional layer includes a buffer layer and a flexible circuit board layer located on the side of the buffer layer away from the display structure layer. The buffer layer is provided with a first photosensitive hole, and the flexible circuit board layer is provided with a second photosensitive hole. The orthographic projection of the second photosensitive hole on the plane of the display structure layer is within the range of the orthographic projection of the first photosensitive hole on the plane of the display structure layer. The first photosensitive hole and the second photosensitive hole together form the photosensitive opening. The photosensitive compensation device is located in the first photosensitive hole.

6. The display panel according to claim 5, characterized in that, in: On a plane perpendicular to the display panel, the photosensitive compensation device also includes a boss area, which is located on the side of the inclined transition area away from the platform area. In a direction perpendicular to the display structure layer, the boss area is disposed between the flexible circuit board layer and the display structure layer.

7. The display panel according to claim 6, characterized in that, in: On a plane perpendicular to the display panel and in a direction parallel to the display structure layer, the horizontal width of the protrusion area does not exceed the distance between the inner wall of the second photosensitive hole on the side closest to the protrusion area and the edge of the photosensitive device.

8. The display panel according to claim 5, characterized in that, in: The shapes of the first and second photosensitive holes include any of the following: rectangular, polygonal, circular, and elliptical.

9. The display panel according to claim 1, characterized in that, in, The inclined surface of the inclined transition zone is either a plane or a curved surface.

10. The display panel according to claim 1, characterized in that, in, The photosensitive compensation device is a plano-concave lens.

11. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 10.

12. A method for manufacturing a display panel, characterized in that, The display panel includes a display area and a photosensitive area, and the manufacturing method includes: A functional layer is formed on the side of the display structure layer that is away from the display. In the photosensitive area, a photosensitive opening is formed in the functional layer; A photosensitive compensation device is disposed within the photosensitive opening on one side near the display structure layer. The photosensitive compensation device is used to change the light path of light rays passing through the display structure layer and striking the photosensitive device, so that all photosensitive areas of the photosensitive device can receive light. The photosensitive compensation device includes a platform area and a tilted transition area. On a plane perpendicular to the display panel, the platform area is disposed opposite to the photosensitive area of ​​the photosensitive device. The tilted transition area is located on either side of the platform area or on either side of the platform area. The thickness of the tilted transition area increases the further away from the platform area. The distance between the platform area and the photosensitive device is greater than the distance between the tilted transition area and the photosensitive device. A photosensitive device layer is formed on the side of the functional layer away from the display structure layer. The photosensitive device layer is provided with a photosensitive device, and the photosensitive device corresponds to the photosensitive opening.

13. The method for manufacturing a display panel according to claim 12, characterized in that, The formation of a functional layer on the side of the display structure layer opposite to the display includes: A buffer layer is formed on the side of the display structure layer away from the display, and a first photosensitive hole is formed in the buffer layer; A flexible circuit board layer is formed on the side of the buffer layer away from the display structure layer. A second photosensitive hole is formed on the flexible circuit board layer. The orthographic projection of the second photosensitive hole on the plane of the display structure layer is within the range of the orthographic projection of the first photosensitive hole on the plane of the display structure layer. The first photosensitive hole and the second photosensitive hole together constitute the photosensitive opening.

14. The method for manufacturing a display panel according to claim 13, characterized in that, The provision of a photosensitive compensation device within the photosensitive opening on the side near the display structure layer includes: A photosensitive compensation device is provided in the first photosensitive hole of the buffer layer.

Images