Display substrate, manufacturing method thereof and display device

Abstract

The invention provides a display substrate, a manufacturing method thereof and a display device. The display substrate comprises a substrate, a light-proof functional film layer and an ambient light sensor, wherein the light-proof functional film layer and the ambient light sensor are arranged on the substrate. The substrate is provided with a display area, the display area comprises a plurality of sub-pixel areas, and an ambient light sensing area is arranged between at least part of every two adjacent sub-pixel areas. A light-transmitting hole is formed in the light-proof functional film layer, and the orthographic projection of the light-transmitting hole on the substrate is located in the ambient light sensing area, so that ambient light on the display side can penetrate through the light-transmitting hole in the light-proof functional film layer to be projected to an ambient light sensor in the ambient light sensing area. The orthographic projection of the ambient light sensor on the substrate is located in the ambient light sensing area.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display substrate, a method for manufacturing the same, and a display device. Background Technology

[0002] OLED (Organic Light-Emitting Diode) displays are considered a promising next-generation display technology due to their advantages such as thinness, light weight, wide viewing angle, active light emission, continuously adjustable emission color, low cost, fast response speed, low power consumption, low driving voltage, wide operating temperature range, simple manufacturing process, high luminous efficiency, narrow bezels, and flexible display capabilities. OLED displays are rapidly gaining traction in the high-end smartphone and wearable device markets due to their unique performance advantages in display quality, thinness, and flexibility.

[0003] With the development of smart terminal display technology, more and more functional devices (such as sensors) are integrated into the screen. The ambient light sensor on the mobile phone is one such functional device that can be integrated into the screen. However, integrating the ambient light sensor into the display screen will occupy a certain area, affect the resolution, and is not conducive to achieving full-screen display. Summary of the Invention

[0004] The technical problem to be solved by this disclosure is to provide a display substrate and its manufacturing method, as well as a display device, which can solve the problem that integrating an ambient light sensor on the display screen will occupy a certain area and is not conducive to achieving full-screen display.

[0005] To address the aforementioned technical problems, the embodiments of this disclosure provide the following technical solutions:

[0006] On one hand, a display substrate is provided, including a substrate, an opaque functional film layer disposed on the substrate, and an ambient light sensor. The substrate has a display area comprising a plurality of sub-pixel areas, with an ambient light sensing area between at least partially adjacent sub-pixel areas. The opaque functional film layer has a light-transmitting hole, the orthographic projection of which onto the substrate lies within the ambient light sensing area, so that ambient light from the display side can pass through the light-transmitting hole in the opaque functional film layer and be projected onto the ambient light sensor in the ambient light sensing area. The orthographic projection of the ambient light sensor onto the substrate lies within the ambient light sensing area.

[0007] On one hand, a method for manufacturing a display substrate is provided, comprising: providing a substrate having a display area, the display area including a plurality of sub-pixel areas, and an ambient light sensing area between at least some of two adjacent sub-pixel areas; forming an opaque functional film layer on the substrate, the opaque functional film layer having a light-transmitting hole, the orthographic projection of the light-transmitting hole on the substrate being located within the ambient light sensing area, so that ambient light on the display side can be projected through the light-transmitting hole in the opaque functional film layer to an ambient light sensor in the ambient light sensing area; and forming an ambient light sensor on the substrate, the orthographic projection of the ambient light sensor on the substrate being located within the ambient light sensing area.

[0008] On the one hand, a display device is provided, including the aforementioned OLED display substrate.

[0009] The embodiments disclosed herein have the following beneficial effects:

[0010] In the above solution, by placing the ambient light sensor between the sub-pixel areas of the display area, there is no need to set up a separate area for the ambient light sensor, thus not affecting the resolution and the achievement of full-screen display. Furthermore, light-transmitting holes are set in the opaque functional film layer between the sub-pixel areas, allowing ambient light to be projected onto the ambient light sensor through the light-transmitting holes to achieve ambient light detection. Attached Figure Description

[0011] Figure 1 This is a plan view of the display substrate in some embodiments of this disclosure;

[0012] Figure 2 This is a partial cross-sectional view of the display substrate in some embodiments of this disclosure;

[0013] Figures 3-6 This is a schematic diagram illustrating the manufacturing process of the display substrate in some embodiments of this disclosure;

[0014] Figure 7 This is a partial planar schematic diagram of the display substrate in some embodiments of this disclosure. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure are within the scope of protection of this disclosure.

[0016] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising,” “having,” and “including,” and any variations thereof, mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. In embodiments of this disclosure, unless otherwise specified, “multiple” refers to two or more.

[0017] With the development of smart terminal display technology, more and more functional devices (such as sensors) are integrated into the screen. The ambient light sensor on the mobile phone is one such functional device that can be integrated into the screen. However, integrating the ambient light sensor into the display screen will occupy a certain area, affect the resolution, and is not conducive to achieving full-screen display.

[0018] Based on this, this disclosure provides a display substrate that, by placing an ambient light sensor between sub-pixel areas of the display area, eliminates the need for a separate area to accommodate the sensor, thus not affecting resolution or the achievement of full-screen display. Furthermore, light-transmitting holes are provided in the opaque functional film layer between the sub-pixel areas, allowing ambient light to be projected onto the ambient light sensor for detection.

[0019] The technical solutions of this disclosure will now be described in detail with reference to specific embodiments and accompanying drawings.

[0020] According to some embodiments of this disclosure, a display substrate is provided. (In conjunction with...) Figure 1 and Figure 2 As shown, the display substrate includes a substrate 201, an opaque functional film layer disposed on the substrate 201, and an ambient light sensor 20.

[0021] The substrate 201 has a display area comprising multiple sub-pixel regions, with an ambient light sensing area 200 between at least some adjacent sub-pixel regions. The orthographic projection of the ambient light sensor 20 onto the substrate 201 lies within the ambient light sensing area 200. A light-transmitting hole 10 is present in the opaque functional film layer, and the orthographic projection of the light-transmitting hole 10 onto the substrate 201 lies within the ambient light sensing area 200, allowing ambient light from the display side to pass through the light-transmitting hole 10 in the opaque functional film layer and be projected onto the ambient light sensor 200 in the ambient light sensing area 200.

[0022] Therefore, by setting an ambient light sensing area between at least some of the adjacent sub-pixel regions, there is no need to set up a separate area for the ambient light sensor, thus not affecting the resolution or the achievement of full-screen display. Furthermore, a light-transmitting hole is opened in the opaque functional film layer of the ambient light sensing area, allowing ambient light to be projected onto the ambient light sensor through the light-transmitting hole to achieve ambient light detection.

[0023] The display substrate in this embodiment can be, for example, an OLED display substrate, a QLED (electroluminescent diode) display substrate, a Micro-LED (micro-light-emitting diode) display substrate, etc.

[0024] The display area of ​​the display substrate may include, for example, but not limited to, a red (R) sub-pixel area 101, a green (G) sub-pixel area 102, and a blue (B) sub-pixel area 103, thereby enabling color display using the RGB three primary colors. Understandably, the display substrate may also enable color display using the RGBY four primary colors, or using the CMY three primary colors.

[0025] In some embodiments, an ambient light sensing area 200 may be formed between a portion of two adjacent sub-pixel regions so as not to affect the resolution of the product.

[0026] According to some embodiments of this application, an ambient light sensing area 200 is provided between at least two adjacent sub-pixel areas. The at least two adjacent sub-pixel areas include a target sub-pixel area. A plurality of light-transmitting holes 10 are provided around the target sub-pixel area to receive more ambient light and ensure the detection accuracy of the ambient light sensor 20.

[0027] Among them, multiple light-transmitting holes 10 can be symmetrically distributed on the periphery of the target sub-pixel area or asymmetrically distributed on the periphery of the target sub-pixel area.

[0028] The target sub-pixel region may be, for example, but is not limited to, the blue sub-pixel region 103.

[0029] In some embodiments, the multiple sub-pixel regions of the display area can be arranged in an array, including multiple rows of sub-pixel regions and multiple columns of sub-pixel regions. Multiple light-transmitting holes can be provided around the target sub-pixel region of the row of sub-pixel regions every other row or multiple rows of sub-pixel regions to reduce the occurrence of optical diffraction.

[0030] According to some embodiments of this application, the display area includes multiple pixel regions, each pixel region including multiple adjacent sub-pixel regions, and the multiple pixel regions can be arranged in an array. At least one light-transmitting hole 10 is provided around the periphery of the target sub-pixel region. The ratio of the sum of the areas of at least one orthogonal projection of each light-transmitting hole 10 onto the substrate 201 to the area of ​​the pixel region is 2% to 8%, that is, the aperture ratio of at least one light-transmitting hole 10 is 2% to 8%, thereby enabling the transmittance of ambient light to reach 2.36% to 4.72%. The ambient light sensor integrated into the display area requires an ambient light transmittance greater than 1% to 2%. Therefore, by reasonably setting the aperture ratio of at least one light-transmitting hole 10, the transmittance requirements of the ambient light sensor can be met, enabling the detection of ambient light intensity.

[0031] In one example, a light-transmitting hole can be formed around the periphery of a target sub-pixel region, with an aperture ratio of approximately 2%.

[0032] In another example, 2 to 4 light-transmitting holes can be formed around the periphery of a target sub-pixel region, with an aperture ratio of approximately 8%.

[0033] The orthographic projection of the light-transmitting hole 10 onto the substrate 201 can be a circle, an ellipse, a square, or a polygon.

[0034] In this embodiment of the present disclosure, the ambient light sensor can be disposed on the back side of the substrate 201 away from the display side, or it can be disposed on the front side of the substrate 201 near the display side.

[0035] In this embodiment, the opaque functional film layer is located on the side of the ambient light sensor closer to the display side. By creating a light-transmitting hole 10 in the opaque functional film layer, ambient light from the display side can pass through the light-transmitting hole 10 and be projected onto the ambient light sensor 20 to detect the intensity of the ambient light. The screen brightness can be adjusted according to the intensity of the ambient light to achieve the best visual effect and improve the user experience.

[0036] According to some embodiments of this disclosure, the display substrate includes a pixel defining layer 110 having a plurality of pixel openings that define a plurality of sub-pixel regions on the substrate 201. The pixel defining layer 110 may be made of an opaque material, such as a resin doped with ink. In this case, the opaque functional film layer includes the pixel defining layer 110, which is located on the side of the ambient light sensor 20 closer to the display side. The light-transmitting aperture 10 includes a first light-transmitting aperture 11 penetrating the pixel defining layer 110, allowing ambient light to be projected onto the ambient light sensor through the first light-transmitting aperture 11 in the pixel defining layer 110.

[0037] According to some embodiments of this disclosure, the display substrate is a COE (Color on Encapsulation) display substrate, which further includes a black matrix 120 and a filter layer 121 disposed on a substrate 201. The black matrix 120 has multiple windows, and the area where the orthographic projection of the windows on the substrate 201 is located at least partially overlaps with the sub-pixel area. The filter layer 121 is located within the windows of the black matrix 120. Furthermore, the black matrix 120 is located on the side of the ambient light sensor 20 closer to the display side. In this case, the opaque functional film layer includes the black matrix 120, and the light-transmitting hole 10 includes a second light-transmitting hole 12 penetrating through the black matrix 120. The second light-transmitting hole 12 and the first light-transmitting hole 11 are positioned correspondingly, so that ambient light from the display side can be projected onto the ambient light sensor 20 of the ambient light sensing area 200 through the corresponding first light-transmitting hole 11 and second light-transmitting hole 12. See [reference needed]. Figures 2-6 As shown.

[0038] According to some embodiments of this disclosure, the display substrate is an OLED display substrate, each sub-pixel region of which includes an OLED. The anode 1 and organic light-emitting layer 2 of the OLED can be located within the pixel opening of the pixel defining layer 110, and the cathodes 3 of multiple OLEDs are an integral structure. The cathodes 3 of the OLED cover the pixel defining layer 110 and the organic light-emitting layer 2. The OLED can be located on the side of the ambient light sensor 20 closer to the display side. In this case, the cathode 3 has a third light-transmitting hole 13, the orthographic projection of the third light-transmitting hole 13 on the substrate 201 is located within the ambient light sensing area 200, and the positions of the third light-transmitting hole 13 and the first light-transmitting hole 11 correspond, so that ambient light from the display side can be projected onto the ambient light sensor 20 of the ambient light sensing area 200 through the corresponding first light-transmitting hole 11 and the third light-transmitting hole 13, avoiding the influence of the ambient light transmittance due to the reflection of the cathode 3. See [link to relevant documentation]. Figures 2-6 As shown.

[0039] According to some embodiments of this disclosure, the display substrate is an active-matrix (AMOLED) display substrate, and each sub-pixel region further includes a thin-film transistor, as well as multiple gate lines and multiple data lines. The anode 1 of the OLED and the drain 7 of the thin-film transistor are connected. The multiple gate lines and multiple data lines are distributed horizontally and vertically, with the gate lines located between two adjacent rows of sub-pixel regions and the data lines located between two adjacent columns of sub-pixel regions. In this case, the opaque functional film layer includes gate lines and data lines, and the light-transmitting hole 10 includes a fourth light-transmitting hole 14 penetrating the gate lines and / or data lines. The fourth light-transmitting hole 14 and the first light-transmitting hole 11 are positioned correspondingly, so that ambient light on the display side can be projected onto the ambient light sensor 20 of the ambient light sensing area 200 through the corresponding first light-transmitting hole 11, third light-transmitting hole 13, and fourth light-transmitting hole 14. Figures 2-6 In the illustrated example, the fourth light-transmitting hole 14 is a via through which the data cable 21 passes.

[0040] In some embodiments, such as Figure 7 As shown, the ambient light sensor 20 and the active layer 4 of the thin-film transistor can be made of the same polycrystalline silicon thin film, which simplifies the manufacturing process and reduces costs.

[0041] In other embodiments, such as Figure 2-6 As shown, the ambient light sensor can also be a standalone device, located on the back of the substrate 201 away from the display side.

[0042] Taking an active-matrix (AMOLED) display substrate as an example, the functional film layers of the display area 100 may include a barrier layer, a buffer layer, a thin-film transistor (TFT), a first planarization layer 206, a second planarization layer 207, a pixel defining layer 110, an organic light-emitting diode, and an encapsulation layer 209, sequentially disposed on a substrate 201. The substrate 201 may be, for example, but is not limited to, a flexible substrate such as a PI substrate. The barrier layer may be a composite multilayer structure of inorganic / organic / inorganic layers, wherein the material of the inorganic layer may be S. i O2, S i N X SiO x N yAlternatively, Al2O3 can be used to prevent external water and oxygen from penetrating the substrate 201, protecting the overlying organic layer. The buffer layer can be a single-layer or multi-layer inorganic layer, for example, it may include a first buffer layer 202 and a second buffer layer 203, used to block impurities or ions from the substrate 201 from diffusing to the active layer 4, ensuring TFT performance and providing a flat surface. The thin-film transistor (TFT) includes an active layer 4, a gate insulator 204, a gate 5, an interlayer dielectric layer 205, a source 6, and a drain 7. The first and second planarization layers are organic layers used to provide a flat carrier surface. The pixel defining layer 110 (PDL) has multiple pixel openings, which define multiple sub-pixel regions in the display area. The multiple sub-pixel regions are arranged in an array, including multiple rows and multiple columns of sub-pixel regions. The pixel defining layer 110 (PDL) can be made of an insulating material doped with ink, which helps reduce crosstalk. An organic light-emitting diode (OLED) includes an anode 1 and an organic light-emitting layer 2 located within a pixel opening in a pixel defining layer 110, and a cathode 3 disposed on the organic light-emitting layer 2. The anode 1 and cathode 3 of the OLED can be made of transparent conductive materials, such as indium tin oxide (ITO), indium zinc oxide (IZO), or indium gallium zinc oxide (IGZO). The encapsulation layer can be a cover plate, such as a glass cover plate, and sealed with a sealing material such as glass powder or epoxy resin. The encapsulation layer can also be a composite multilayer structure of inorganic / organic / inorganic layers. Figure 2-6 In the illustrative example, the encapsulation layer 209 is a composite multilayer structure of inorganic layer / organic layer / inorganic layer.

[0043] The functional film layer of the display area may also include multiple gate lines fabricated in the same layer as the gate electrode 5 and multiple data lines 21 fabricated in the same layer as the source and drain electrodes. The data lines 21 may extend along the column direction, and the multiple data lines 21 may be arranged along the row direction. The gate lines may extend along the row direction, and the multiple gate lines may be arranged along the column direction.

[0044] For a COE (Color on Encapsulation) OLED display substrate, the functional film layer of the display area may also include a black matrix 120 disposed on the encapsulation layer 209 and a filter layer 121 disposed in the window of the black matrix 120.

[0045] For an OLED display substrate with integrated touch technology, the functional film layer of the display area may also include a protective layer 210 covering the black matrix 120 and the filter layer 121, and a touch sensing layer 211 disposed on the protective layer 210.

[0046] In this embodiment, the opaque functional film layer may include a pixel defining layer 110, a black matrix 120, gate lines, and data lines. The light-transmitting holes 10 in the ambient light sensing area 200 include a first light-transmitting hole 11 penetrating the pixel defining layer 110, a second light-transmitting hole 12 penetrating the black matrix 120, and a fourth light-transmitting hole 14 penetrating the gate lines and / or data lines. The cathode 3 of the OLED may include a third light-transmitting hole 13 located in the ambient light sensing area 200. The positions of the first light-transmitting hole 11, the second light-transmitting hole 12, the third light-transmitting hole 13, and the fourth light-transmitting hole 14 are corresponding, so that ambient light can be sequentially transmitted through the corresponding second light-transmitting hole 12, the first light-transmitting hole 11, the third light-transmitting hole 13, and the fourth light-transmitting hole 14 and projected onto the ambient light sensor 20 below.

[0047] See Figure 7 As shown, the ambient light sensor 20 can be a co-layer structure with the active layer 4 of the thin-film transistor, both made of the same polycrystalline silicon film layer. Alternatively, the ambient light sensor 20 can be made of a single-crystal silicon film layer, and can be a co-layer structure with the active layer 4 of the thin-film transistor, both made of different film layers. In this case, the display substrate can further include a first photosensitive signal line 22 and a second photosensitive signal line 23, which are electrically connected to opposite ends of the ambient light sensor 20 to extract the sensing signal from the ambient light sensor 20. The first photosensitive signal line 22 and the second photosensitive signal line 23 can be a co-layer structure with the source and drain electrodes, both made of the same source and drain metal film layer.

[0048] The display substrate may further include a first light-shielding layer 8 and a second light-shielding layer 9. The first light-shielding layer 8 is located on the side of the active layer 4 of the thin-film transistor facing away from the display side, and the second light-shielding layer 9 is located on the side of the ambient light sensor 20 facing away from the display side. The orthographic projection of the active layer 4 onto the plane of the substrate 201 lies within the orthographic projection of the first light-shielding layer 8 onto the plane of the substrate 201, and the orthographic projection of the ambient light sensor onto the plane of the substrate 201 lies within the orthographic projection of the second light-shielding layer 9 onto the plane of the substrate 201. The first light-shielding layer 8 and the second light-shielding layer 9 can prevent ambient light or light from adjacent pixels from shining onto the polysilicon layer from below, avoiding photo-induced leakage current. The first light-shielding layer 8 and the second light-shielding layer 9 can be grounded metal, thereby shielding against interference from external electric fields, and the metal layer helps with uniform heat dissipation.

[0049] It should be noted that the ambient light sensor 20 can also be a standalone device, disposed on the back side of the substrate 201 away from the display side, see [reference]. Figures 2-6 As shown. Figure 2 and Figure 7 The only difference is the way the ambient light sensor is set up; the positions and relationships of other structures and membranes can be the same.

[0050] It is understood that the above description uses an AMOLED display substrate as an example to illustrate the various functional film layers in the display area. It does not limit the display area of ​​the OLED display substrate in this embodiment to necessarily including the aforementioned functional film layers. For example, the display area of ​​a passive OLED (PMOLED) display substrate does not include a thin-film transistor (TFT) layer, gate lines, and data lines. Similarly, in the case of an external touchscreen, the display substrate does not include a protective layer and a touch sensing layer. Furthermore, when using a separate color filter, the display substrate does not include a black matrix and a filter layer.

[0051] According to some embodiments of this disclosure, a method for manufacturing a display substrate is also provided, see [link to relevant documentation]. Figures 1-6 As shown, the method may include:

[0052] Step S110: Provide a substrate 201, the substrate 201 having a display area, the display area including a plurality of sub-pixel areas, and at least a partial ambient light sensing area 200 between two adjacent sub-pixel areas;

[0053] Step S120: An opaque functional film layer is formed on the substrate 201. The opaque functional film layer has a light-transmitting hole 10. The orthogonal projection of the light-transmitting hole 10 on the substrate 201 is located in the ambient light sensing area 200, so that the ambient light on the display side can be projected to the ambient light sensor 20 of the ambient light sensing area 200 through the light-transmitting hole 10 in the opaque functional film layer.

[0054] Step S130: An ambient light sensor 20 is formed on the substrate 201, and the orthographic projection of the ambient light sensor 20 on the substrate 201 is located within the ambient light sensing area 200.

[0055] In the above method steps, by setting an ambient light sensing area between at least some of the adjacent sub-pixel regions, there is no need to set up a separate area for the ambient light sensor, thus not affecting the resolution and the achievement of full-screen display. Furthermore, a light-transmitting hole is opened in the opaque functional film layer of the ambient light sensing area, allowing ambient light to be projected onto the ambient light sensor through the light-transmitting hole to achieve ambient light detection.

[0056] In one example, the display substrate is an OLED display substrate, and the opaque functional film layer may include a pixel defining layer 110, gate lines, data lines 21 and black matrix 120. The light-transmitting hole 10 includes a first light-transmitting hole 11 penetrating the pixel defining layer 110, a second light-transmitting hole 12 penetrating the black matrix 120, and a fourth light-transmitting hole 14 penetrating the gate lines and / or data lines 21.

[0057] See Figures 2-6 As shown, the method for manufacturing a display substrate may include:

[0058] Thin-film transistors are formed within the sub-pixel region;

[0059] A grid line is formed between two adjacent rows of sub-pixel regions;

[0060] Data lines 21 are formed between two adjacent columns of sub-pixel regions;

[0061] A fourth light-transmitting hole 14 is formed through the grid line and / or data line 21, and the orthogonal projection of the fourth light-transmitting hole 14 on the substrate 201 is located within the ambient light sensing area 200.

[0062] Forming a planarization layer on a thin-film transistor;

[0063] A pixel defining layer 110 is formed on a planar layer. The pixel defining layer 110 has multiple pixel openings, and the pixel openings define multiple sub-pixel regions in the display area.

[0064] A first light-transmitting hole 11 is formed that penetrates the pixel defining layer 110;

[0065] Multiple OLEDs are formed on the pixel defining layer 110. The anode 1 and the light-emitting layer of the OLED are located inside the pixel opening. The cathode 3 of the multiple OLEDs are an integral structure and cover the pixel defining layer 110 and the light-emitting layer.

[0066] A third light-transmitting hole 13 is formed in the cathode 3;

[0067] Forming a thin-film encapsulation layer covering multiple OLEDs;

[0068] A black matrix 120 is formed on the thin film encapsulation layer. The black matrix 120 has multiple windows. The regions where the orthogonal projections of the windows onto the substrate 201 are located at least partially overlap with the sub-pixel regions.

[0069] A filter layer 121 is formed within the window;

[0070] A second light-transmitting hole 12 is formed in the black matrix 120. The positions of the first light-transmitting hole 11, the second light-transmitting hole 12, the third light-transmitting hole 13, and the fourth light-transmitting hole 14 are corresponding, so that the ambient light on the display side can be projected onto the ambient light sensor 20 of the ambient light sensing area 200 through the corresponding fourth light-transmitting hole 14, the first light-transmitting hole 11, the third light-transmitting hole 13, and the second light-transmitting hole 12.

[0071] In this example, the opaque functional film layer may include a pixel defining layer 110, a black matrix 120, gate lines, and data lines 21. The light-transmitting holes 10 in the ambient light sensing area 200 include a first light-transmitting hole 11 penetrating the pixel defining layer 110, a second light-transmitting hole 12 penetrating the black matrix 120, and a fourth light-transmitting hole 14 penetrating the gate lines and / or data lines 21. The cathode 3 of the OLED may include a third light-transmitting hole 13 located in the ambient light sensing area 200. The positions of the first light-transmitting hole 11, the second light-transmitting hole 12, the third light-transmitting hole 13, and the fourth light-transmitting hole 14 are corresponding, so that ambient light can be sequentially transmitted through the corresponding second light-transmitting hole 12, the first light-transmitting hole 11, the third light-transmitting hole 13, and the fourth light-transmitting hole 14 and projected onto the ambient light sensor below.

[0072] In this example, without affecting the manufacturing process of the OLED display substrate, the light-transmitting holes can be opened simultaneously in the manufacturing processes of the pixel defining layer 110, the black matrix 120, and the data line 21.

[0073] Before forming the thin-film encapsulation layer 209, the cathode 3 of the OLED can be patterned using a UV laser cutting device to form a third light-transmitting hole 13 in the cathode 3. Alternatively, after forming the thin-film encapsulation layer 209, an IR laser cutting device can be used to cut the cathode 3 of the OLED through the thin-film encapsulation layer to form the third light-transmitting hole 13 in the cathode 3. The third light-transmitting hole 13 in the cathode 3 of the OLED can be circular.

[0074] According to some embodiments of this disclosure, a display device is also provided, including the display substrate described above.

[0075] The display device includes, but is not limited to, components such as a display panel, a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply. Those skilled in the art will understand that the structure of the display device described above does not constitute a limitation on the display device; the display device may include more or fewer of the aforementioned components, or combine certain components, or arrange different components. In the embodiments of this disclosure, the display device includes, but is not limited to, a monitor, a mobile phone, a tablet computer, a television set, a wearable electronic device, a navigation display device, etc.

[0076] Display devices can be any product or component with display function, such as televisions, monitors, digital photo frames, mobile phones, and tablets. Display devices also include flexible circuit boards, printed circuit boards, and backplanes.

[0077] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0078] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display substrate, comprising: A substrate having a display area, the display area comprising a plurality of sub-pixel areas, wherein at least some adjacent sub-pixel areas are separated by an ambient light sensing area; An opaque functional film layer is disposed on the substrate, and the opaque functional film layer has a light-transmitting hole. The orthogonal projection of the light-transmitting hole on the substrate is located within the ambient light sensing area, so that ambient light on the display side can be projected to the ambient light sensor in the ambient light sensing area through the light-transmitting hole in the opaque functional film layer. An ambient light sensor is disposed on the substrate, and the orthographic projection of the ambient light sensor on the substrate is located within the ambient light sensing area.

2. The display substrate according to claim 1, wherein, The at least two adjacent sub-pixel regions include a target sub-pixel region, and a plurality of light-transmitting holes are provided on the periphery of the target sub-pixel region, the plurality of light-transmitting holes being symmetrically distributed on the periphery of the target sub-pixel region.

3. The display substrate according to claim 1, wherein, The display area includes multiple pixel regions, and each pixel region includes multiple adjacent sub-pixel regions; At least two adjacent sub-pixel regions include a target sub-pixel region, and at least one light-transmitting hole is provided around the periphery of the target sub-pixel region. The ratio of the sum of the areas of at least one orthogonal projection of each of the at least one light-transmitting hole on the substrate to the area of ​​the pixel region is 2% to 8%.

4. The display substrate according to claim 1, wherein, The orthographic projection of the light-transmitting hole onto the substrate is circular, elliptical, square, or polygonal.

5. The display substrate according to any one of claims 1-4, further comprising: A pixel defining layer is disposed on the substrate, the pixel defining layer having a plurality of pixel openings, the plurality of pixel openings defining the plurality of sub-pixel regions in the display area; The opaque functional film layer includes a pixel defining layer, and the light-transmitting hole includes a first light-transmitting hole that penetrates the pixel defining layer.

6. The display substrate according to claim 5, wherein, The opaque functional film layer also includes: A black matrix is ​​disposed on the substrate, the black matrix having multiple windows, and the region where the orthographic projection of the window on the substrate is located at least partially overlaps with the sub-pixel region; The filter layer located within the window; The opaque functional film layer includes the black matrix, and the light-transmitting hole includes a second light-transmitting hole that penetrates the black matrix. The second light-transmitting hole and the first light-transmitting hole are positioned to correspond, so that ambient light on the display side can be projected onto the ambient light sensor in the ambient light sensing area through the first light-transmitting hole and the second light-transmitting hole at the corresponding positions.

7. The display substrate according to claim 5, further comprising: Multiple OLEDs, wherein the anode and light-emitting layer of the OLEDs are located within the sub-pixel region, and the cathodes of the multiple OLEDs are an integral structure; The cathode has a third light-transmitting hole, the orthographic projection of which on the substrate is located within the ambient light sensing area, and the third light-transmitting hole corresponds to the position of the first light-transmitting hole, so that ambient light on the display side can be projected onto the ambient light sensor in the ambient light sensing area through the corresponding first and third light-transmitting holes.

8. The display substrate according to claim 7, further comprising: Multiple thin-film transistors are located within the sub-pixel region, and the anode of the OLED is connected to the drain electrode of the thin-film transistors; Multiple gate lines and multiple data lines are distributed horizontally and vertically, with the gate lines located between two adjacent rows of sub-pixel regions and the data lines located between two adjacent columns of sub-pixel regions; The opaque functional film layer further includes the grid lines and data lines, and the light-transmitting hole includes a fourth light-transmitting hole that passes through the grid lines and / or data lines. The fourth light-transmitting hole and the first light-transmitting hole are positioned to correspond to each other, so that ambient light on the display side can be projected onto the ambient light sensor in the ambient light sensing area through the first light-transmitting hole, the third light-transmitting hole and the fourth light-transmitting hole corresponding to the position.

9. The display substrate according to claim 8, wherein, The ambient light sensor and the active layer of the thin-film transistor are homogeneous structures made from the same polycrystalline silicon thin film.

10. The display substrate according to any one of claims 1-4, wherein, The ambient light sensor is located on the back side of the substrate, away from the display side.

11. A display device comprising a display substrate according to any one of claims 1-10.

12. A method for manufacturing a display substrate, comprising: A substrate is provided, the substrate having a display area, the display area including a plurality of sub-pixel areas, and an ambient light sensing area between at least partially adjacent two sub-pixel areas; An opaque functional film layer is formed on the substrate, and the opaque functional film layer has a light-transmitting hole. The orthogonal projection of the light-transmitting hole on the substrate is located within the ambient light sensing area, so that ambient light on the display side can be projected to the ambient light sensor in the ambient light sensing area through the light-transmitting hole in the opaque functional film layer. An ambient light sensor is formed on the substrate, and the orthographic projection of the ambient light sensor on the substrate is located within the ambient light sensing area.

13. The manufacturing method according to claim 12, wherein, The display substrate is an OLED display substrate, the opaque functional film layer includes a pixel defining layer, gate lines, data lines and a black matrix, and the light-transmitting holes include a first light-transmitting hole penetrating the pixel defining layer, a second light-transmitting hole penetrating the black matrix, and a fourth light-transmitting hole penetrating the gate lines and / or data lines. The manufacturing method includes: A thin-film transistor is formed within the sub-pixel region; A grid line is formed between two adjacent rows of sub-pixel regions; Data lines are formed between two adjacent columns of sub-pixel regions; A fourth light-transmitting hole is formed through the grid line and / or data line, and the orthogonal projection of the fourth light-transmitting hole on the substrate is located within the ambient light sensing area; Forming a planarization layer on a thin-film transistor; The pixel defining layer is formed on the planar layer, the pixel defining layer having a plurality of pixel openings, the pixel openings defining the plurality of sub-pixel regions in the display area; A first light-transmitting hole is formed that penetrates the pixel defining layer; Multiple OLEDs are formed on the pixel defining layer, the anode and light-emitting layer of the OLEDs are located within the pixel opening, and the cathodes of the multiple OLEDs are an integral structure covering the pixel defining layer and the light-emitting layer; A third light-transmitting hole is formed in the cathode; Forming a thin-film encapsulation layer covering multiple OLEDs; A black matrix is ​​formed on the thin film encapsulation layer. The black matrix has multiple windows, and the regions where the orthogonal projections of the windows onto the substrate are located at least partially overlap with the sub-pixel regions. A filter layer is formed within the window; A second light-transmitting hole is formed in the black matrix. The positions of the first light-transmitting hole, the second light-transmitting hole, the third light-transmitting hole, and the fourth light-transmitting hole are corresponding, so that ambient light on the display side can be projected onto the ambient light sensor in the ambient light sensing area through the fourth light-transmitting hole, the first light-transmitting hole, the third light-transmitting hole, and the second light-transmitting hole corresponding to the position.

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