Display panel, laser touch display device, light sensing touch device and method

Abstract

The invention discloses a display panel, a laser touch display device and a light sensing touch device and method.The display panel comprises a display area and a first conducting layer, the display area comprises a substrate, a light emitting unit, a pixel driving circuit and a light sensor, and the light sensor comprises a light sensing device, a first transmission electrode and a second transmission electrode; the first transmission electrode is connected with a plurality of light sensors along one of two parallel directions of the surface of the display panel through a first signal transmission line in the first conductive layer, and the second transmission electrode is a transparent electrode. The laser touch display device comprises a touch chip, a display driving chip and the display panel. The light sensing touch device comprises the display panel and a laser pen used for emitting two kinds of laser to the display panel, and the two kinds of laser correspond to two kinds of operation respectively. The touch control method for the laser touch control display device comprises the following steps: the touch control chip receives an induction signal generated by the light sensor and controls the on-off of the target driving circuit; the problem that a screen is inconvenient to touch at a short distance is solved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel, a laser touch display device, a light-sensing touch device, and a light-sensing touch method. Background Technology

[0002] With the rapid development of electronic products, touch screens have been widely adopted in products such as computers, mobile phones, and home appliances. Among touch display panels, capacitive touch display panels achieve touch operation by detecting changes in capacitance, enabling multi-touch.

[0003] However, this touch control method requires close-range hand operation. When using a large-size touch screen, close-range operation prevents users from seeing the entire screen, and the screen will be distorted, making it difficult for users to operate the screen. Summary of the Invention

[0004] This application provides a display panel, a laser touch display device, a light-sensing touch device and method to solve the problem of inconvenience in touching screens at close range.

[0005] According to a first aspect of this application, a display panel is provided, including a display area, the display area including a substrate, a plurality of light-emitting units, a plurality of pixel driving circuits and a plurality of light sensors, the pixel driving circuits being electrically connected to the light-emitting units, the plurality of light sensors being arranged in an array along a first direction and a second direction, the first direction and the second direction being parallel to the surface of the substrate; the display panel further includes a first conductive layer located on one side of the substrate, the light sensor including a photosensitive device and a first transmission electrode and a second transmission electrode located on both sides of the photosensitive device along a third direction, the second transmission electrode being a transparent electrode, the first conductive layer having a first signal transmission line, the first transmission electrodes of the plurality of light sensors being connected along the first direction or the second direction through the first signal transmission line, the third direction being perpendicular to the surface of the substrate.

[0006] According to a second aspect of this application, a laser touch display device is provided, including a touch chip, a display driver chip, and the aforementioned display panel. The touch chip is electrically connected to the electrodes of a plurality of light sensors in the display panel, and the display driver chip is electrically connected to both the touch chip and a plurality of pixel driving circuits in the display panel.

[0007] According to a third aspect of this application, a light-sensing touch device is provided, including a laser pen and the aforementioned display panel. The laser pen is used to emit a first laser or a second laser onto the display panel, wherein: a light sensor in the display panel performs a first operation upon receiving the first laser; the light sensor performs the first operation upon receiving the second laser; and the first laser and the second laser are lasers of different colors or lasers of the same color but different frequencies.

[0008] According to a fourth aspect of this application, a light-sensing touch control method is provided, applied in the aforementioned laser touch display device. The method includes: when a target light sensor in the laser touch display device generates a sensing signal, a touch chip generates a control signal corresponding to the sensing signal, wherein the target light sensor is at least one light sensor in the display panel; and a display driver chip controls the switching of a target pixel driving circuit according to the control signal, wherein the target pixel driving circuit is at least one of a plurality of pixel driving circuits, and the target pixel driving circuit is a pixel driving circuit corresponding to the target light sensor.

[0009] The display panel proposed in this application includes a display area, which comprises a substrate, multiple light-emitting units, multiple pixel driving circuits, and multiple light sensors. The pixel driving circuits are electrically connected to the light-emitting units. The multiple light sensors are arranged in an array along a first direction and a second direction, which are parallel to the surface of the substrate. The light sensor array is also arranged in an array along the first and second directions, and the light sensors are parallel to the surface of the substrate. This allows each light sensor to capture the light signal at its location and ensures effective coverage of the light sensors on the screen, thereby achieving full-range reception of light signals from in front of the screen. The display panel also includes a first conductive layer located on one side of the substrate, which has first signal transmission lines. These signal transmission lines provide connections between the light sensors, ensuring that signals are transmitted quickly and accurately. The light sensor includes a photosensitive element and a first transmission electrode and a second transmission electrode located on both sides of the photosensitive element along a third direction. The second transmission electrode is a transparent electrode. The first transmission electrodes of the multiple light sensors are connected along the first signal transmission lines in the first or second direction, which are perpendicular to the surface of the substrate. The transparent nature of the second transmission electrode ensures that external light signals are not blocked when they reach the light sensor. The first signal transmission line extends along a first or second direction and connects multiple light sensors, so that the sensing signals of all light sensors converge on the first signal transmission line, which facilitates the subsequent connection to the control chip. The sensing signals are transmitted to the control chip through the first signal transmission line, and the control chip controls the pixel driving circuit to make the light-emitting unit generate a corresponding response, so as to complete the touch control of the screen with external light signals. The light signals can be emitted to the screen from a distance, thus realizing the effect of long-distance touch control. Attached Figure Description

[0010] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0011] Figure 1 This is a cross-sectional view of a first type of display panel provided according to an embodiment of this application;

[0012] Figure 2 This is a cross-sectional view of a second type of display panel provided according to an embodiment of this application;

[0013] Figure 3 This is a cross-sectional view of a third type of display panel provided according to an embodiment of this application;

[0014] Figure 4 This is a cross-sectional view of the fourth type of display panel provided according to the embodiments of this application;

[0015] Figure 5 This is a cross-sectional view of the fifth type of display panel provided according to an embodiment of this application;

[0016] Figure 6 This is a top view of the first type of display panel provided according to an embodiment of this application;

[0017] Figure 7 This is a top view of a second type of display panel provided according to an embodiment of this application;

[0018] Figure 8 This is a top view of a third type of display panel provided according to an embodiment of this application;

[0019] Figure 9 This is a schematic diagram of the structure of a laser touch display device according to an embodiment of this application;

[0020] Figure 10 This is a schematic diagram of the structure of a laser pointer according to an embodiment of this application;

[0021] Figure 11 This is a schematic diagram of the structure of a light-sensing touch device according to an embodiment of this application;

[0022] Figure 12 This is a flowchart of a light-sensing touch control method provided according to an embodiment of this application;

[0023] The above figures include the following reference numerals:

[0024] 1. Display area; 101. Substrate; 102. Light-emitting unit; 103. Pixel driving circuit; 10301. Active structure; 104. Light sensor; 10401. First sensor; 10402. Second sensor; 1041. Photosensitive device; 1042. First transmission electrode; 1043. Second transmission electrode; 105. First conductive layer; 1051. First signal transmission line; 10511. First sub-conductive part; 10512. Second sub-conductive part; 1061. Second signal transmission line; 10611. Third sub-conductive part; 10612. Fourth sub-conductive part; 107. Color filter substrate; 108. Light-shielding layer; 109. First via; 110. Second via; 201. Laser pointer; 1001. Water and oxygen barrier layer; 1002. Barrier layer; 1003. Buffer layer; 10031. First buffer layer; 10032. Second buffer layer; 1031. Gate insulating layer; 1032. Capacitor insulating layer; 1033. Insulating dielectric layer; 1034. Passivation layer; 1004. First planarization layer; 1005. Second planarization layer; 1006. Pixel definition layer; 1007. Thin film encapsulation layer; 1008. Anti-reflective color filter layer; 10. Display panel; 20. Touch chip; 30. Display driver chip. Detailed Implementation

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] As mentioned in the background section, capacitive touch display panels require close-range hand operation. When using large-size touch screens, close-range operation prevents users from viewing the entire screen, and the displayed image is distorted, hindering screen operation. To address these issues, this application provides a display panel, a laser touch display device, a light-sensing touch device, and a method, wherein, as... Figures 1 to 8 As shown, a display panel is provided, including a display area 1. The display area 1 includes a substrate 101, a plurality of light-emitting units 102, a plurality of pixel driving circuits 103 and a plurality of light sensors 104. The pixel driving circuits 103 are electrically connected to the light-emitting units 102.

[0029] like Figure 6 As shown, multiple light sensors 104 are arranged in an array along a first direction a and a second direction b, with the first direction a and the second direction b parallel to the surface of the substrate 101. A first signal transmission line 1051 extends along the first direction a and a second signal transmission line 1061 extends along the second direction b. The display panel also includes a first conductive layer 105 located on one side of the substrate 101, such as... Figures 1 to 5 As shown, the light sensor 104 includes a photosensitive element 1041 and a first transmission electrode 1042 and a second transmission electrode 1043 located on both sides of the photosensitive element 1041 along a third direction. The second transmission electrode 1043 is a transparent electrode. A first signal transmission line 1051 is provided in the first conductive layer 105. The first transmission electrodes 1042 of multiple light sensors 104 are connected along a first direction a or a second direction b through the first signal transmission line 1051, with the third direction perpendicular to the surface of the substrate 101. The first transmission electrodes 1042 and 1043 are used to collect and transmit signals from the light sensor 104. The transparency of the second transmission electrode 1043 ensures unobstructed transmission of light signals. The first signal transmission line 1051 connects all light sensors to form a signal network. The first conductive layer 105 serves as a platform for signal transmission, ensuring efficient transmission of signals from the light sensor 104.

[0030] In the embodiments of this application, such as Figures 1 to 6As shown, the substrate 101 provides support and protection for the display panel while ensuring its thinness and flexibility. The light-emitting unit 102 displays images, achieving high resolution and rich color display effects. The pixel driving circuit 103 is electrically connected to the light-emitting unit 102 and controls the brightness of each light-emitting unit 102, ensuring high precision and response speed for high-quality dynamic display. Multiple light sensors 104 are arranged in an array along a first direction a and a second direction b. The arrangement of the first direction a and the second direction b parallel to the surface of the substrate 101 ensures that the entire display area 1 is covered with light sensors 104, enabling precise positioning of light touch signals from in front of the screen and improving touch accuracy and response speed. The first conductive layer 105 provides electrical connection to the light sensors 104 and also serves as a signal transmission carrier, ensuring signal transmission efficiency and stability. The photosensitive device 1041 is the core component of the light sensor 104, used to receive external light signals and convert them into electrical signals that can be used for further processing. The light sensor 104 also includes a first transmission electrode 1042 and a second transmission electrode 1043 located on both sides of the photosensitive device 1041 along a third direction; the third direction is perpendicular to the surface of the substrate 101. This electrode design ensures that the photosensitive device 1041 can efficiently receive external light signals and transmit signals to the touch chip through the electrodes, achieving effective signal transmission and processing. The second transmission electrode 1043 can be a transparent electrode to prevent external light signals from being blocked by the second transmission electrode 1043, thus preventing the light signals from being transmitted to the light sensor 104. The first signal transmission line 1051 is the path for the light sensor 104 to transmit signals to the touch chip. The design of the first signal transmission line 1051 connects the signal transmission paths, reducing signal delay and loss. The first transmission electrodes 1042 of multiple light sensors 104 are connected along a first direction a or a second direction b through the first signal transmission line 1051; this connection method simplifies the complexity of the touch system, improves the efficiency of signal transmission, and makes the touch response faster and the operation experience smoother.

[0031] This application embodiment ensures the detection of touch signals across the entire screen area through the array arrangement of optical sensors, without affecting display quality due to the physical presence of the sensors. Specifically, the optical sensors receive external light signals and convert them into electrical signals. These electrical signals are then transmitted to the touch chip via a first transmission electrode and a first signal transmission line. The touch chip processes these electrical signals and sends signals to the pixel driving circuit to drive the light-emitting units to complete the touch display. Since the light signals can be transmitted to the screen at a certain distance, touch display can be completed without touching the screen, achieving long-distance touch functionality. Through the precise coordination between the pixel driving circuit and the light-emitting units, and the parallel layout of the optical sensors and the substrate 101, the integration of touch and display functions is achieved. Especially on large-size display panels, this greatly expands the operating space of touch, supports touch operations at greater distances, and enhances the flexibility and applicability of touch. Furthermore, the display panel provided in this embodiment enhances the user experience, avoids blurred vision caused by close-range operation, and is particularly beneficial for long-term use of large screens (such as education and meetings), reducing the risk of eye fatigue, solving the problem of image distortion seen by the human eye when using the screen at close range, improving user comfort, and solving the problem of inconvenience of close-range touch screen in related technologies.

[0032] The above is the core idea of ​​this application. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to specific embodiments and accompanying drawings. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] Example 1

[0034] This embodiment provides a display panel, such as Figure 1 and Figure 6As shown, the display area includes a display area 1 and a first conductive layer 105. The display area 1 includes a substrate 101, a plurality of light-emitting units 102, a plurality of pixel driving circuits 103 and a plurality of light sensors 104. The pixel driving circuits 103 are electrically connected to the light-emitting units 102. The plurality of light sensors 104 are arranged in an array along a first direction a and a second direction b. The first direction a and the second direction b are parallel to the surface of the substrate 101. The first signal transmission line 1051 extends along the first direction a and the second signal transmission line 1061 extends along the second direction b. The first conductive layer 105 is located on one side of the substrate 101. The photosensitive element 104 includes a photosensitive element 1041 and a first transmission electrode 1042 and a second transmission electrode 1043 located on both sides of the photosensitive element 1041 along a third direction. The second transmission electrode 1043 is a transparent electrode. The first conductive layer 105 has a first signal transmission line 1051. The first transmission electrodes 1042 of the plurality of photosensitive elements 104 are connected along a first direction a or a second direction b through the first signal transmission line 1051. The third direction is perpendicular to the surface of the substrate 101.

[0035] For example, such as Figures 1 to 5 As shown, the display area 1 includes a substrate 101, a water and oxygen barrier layer 1001, a barrier layer 1002, a buffer layer 1003, a gate insulating layer 1031, a capacitor insulating layer 1032, an insulating dielectric layer 1033, a passivation layer 1034, a first planarization layer 1004, a second planarization layer 1005, a pixel definition layer 1006, a thin film encapsulation layer 1007, and an anti-reflection color filter layer 1008, which, as shown... Figure 1 and Figure 3 As shown, the buffer layer 1003 also includes a first buffer layer 10031 and a second buffer layer 10032, with the first buffer layer in contact with the barrier layer 1002.

[0036] Exemplarily, the substrate includes one or more of glass and flexible substrate (PI), the flexible substrate PI being formed of any suitable insulating material having flexibility, including one or more of polyimide (PI), polycarbonate (PC), polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyaryl compounds (PAR), and glass fiber reinforced plastic (FRP), and the substrate may also include other types, which may be selected by those skilled in the art as needed.

[0037] For example, the material of the water and oxygen barrier layer includes one or more of silicon oxide (SiO) and silicon nitride (SiN), and the material of the barrier also includes other types, which are not specifically limited in this application.

[0038] For example, the barrier layer (PI2) may be made of one or more materials selected from polyimide (PI), polycarbonate (PC), polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyaryl compounds (PAR), and glass fiber reinforced plastic (FRP).

[0039] For example, the material of the buffer layer includes one or more of silicon oxide (SiOx), silicon nitride (SiNx), silicon oxynitride (SiOxNy), aluminum oxide (AlOx), or aluminum nitride (AlNx), and the buffer layer may also contain multiple sub-buffer layers to block oxygen and moisture and provide a flat surface.

[0040] Exemplarily, the gate insulating layer (GI) further includes an active layer (poly), which includes a source region and a drain region formed by doping. The region between the source region and the drain region is an undoped channel region. The material of GI includes one or more of silicon oxide (SiO) and silicon nitride (SiN), and other materials of GI are also included, which are not specifically limited in this application.

[0041] For example, the materials of the capacitor insulating layer (IMD), insulating dielectric layer (ILD), and passivation layer (PV) include one or more of silicon oxide (SiO) and silicon nitride (SiN). The IMD also includes a first metal layer / gate (M1), and the ILD also includes a capacitor layer (MC). The materials of M1 and MC include one or more of molybdenum (Mo) and its oxides. Other types of materials are also included in the above-mentioned layers, which are not specifically limited in this application.

[0042] For example, the materials of the first planarization layer (PLN1) and the second planarization layer (PLN2) include one or more of acrylic, polyimide (PI) and benzocyclobutene (BCB), and PLN2 also includes a third metal layer (M3), the material of which includes one or more of molybdenum (Mo) and its oxides.

[0043] For example, the pixel definition layer (PDL) is made of one or more of polyimide (PI), polyamide, benzocyclobutene (BCB), acrylic resin, phenolic resin and SiNx. The PDL also includes a reflective layer (RE) and some light-emitting devices (light-emitting units). The RE is made of one or more of indium tin oxide (ITO) and silver (Ag).

[0044] For example, the material of the first conductive layer includes one or more of indium tin oxide (ITO) and molybdenum (Mo), and other materials of the first conductive layer are also included, which are not specifically limited in this application.

[0045] For example, the light-emitting unit includes one or more of the following: organic light-emitting diode (OLED) light-emitting pixels, light-emitting diode (LED), and miniature light-emitting diode (Mini LED). The light-emitting unit shown in this embodiment is an OLED, and each light-emitting unit contains only one of the three sub-pixels: red, green, and blue.

[0046] For example, the photosensitive device in the light sensor is a photodiode, which is used to receive light spots. Its material includes amorphous silicon (a-Si). The photosensitive device also includes other types. This is only one embodiment of the present application. The present application does not specifically limit the type of photosensitive device. Those skilled in the art can choose according to actual needs.

[0047] For example, the photosensitive device shown in the embodiments of this application is used to receive laser light spots. Laser has advantages over other types of light, such as high brightness, good monochromaticity, strong directionality and high safety.

[0048] like Figure 1 and Figure 6 As shown, the display panel also includes a second conductive layer located on the side of the first conductive layer 105 away from the substrate 101. The second conductive layer has a second transmission electrode 1043 and a second signal transmission line 1061. The second transmission electrodes 1043 of the plurality of light sensors 104 are connected through the second signal transmission line 1061. There is an overlapping area between the first conductive layer 105 and the second conductive layer. The overlapping area includes a photosensitive device 1041.

[0049] In this embodiment, if Figure 1 and Figure 6 As shown, the second conductive layer includes a second transmission electrode 1043 and a second signal transmission line 1061. All the second transmission electrodes 1043 are connected via the second signal transmission line 1061 to form a complete signal network. Connecting all the second transmission electrodes 1043 via the second signal transmission line 1061 is equivalent to all the second transmission electrodes 1043 sharing an electrode, ensuring a consistent IR voltage drop (IR drop) for the second transmission electrodes 1043. This provides an additional path for signal transmission from the photosensor 104, increasing the redundancy and stability of signal transmission and improving the uniformity of the photocurrent. Through the design of the overlapping region, the photocurrent signal can form a closed loop between the two conductive layers.

[0050] For example, the material of the second conductive layer includes one or more of indium tin oxide (ITO) and molybdenum (Mo), and other materials of the second conductive layer are also included, which are not specifically limited in this application.

[0051] In some alternative implementations, such as Figure 1 As shown, the first transmission electrode 1042 is located between the first conductive layer 105 and the photosensitive device 1041. The first transmission electrode 1042 of the plurality of photosensitive sensors 104 is connected to the first conductive layer 105 through the first via 109. The second conductive layer and the first conductive layer 105 have an overlapping area, which includes the photosensitive device 1041. In this embodiment, the first transmission electrode 1042 and the first conductive layer 105 are not in the same layer, which reduces the manufacturing difficulty. The above layout ensures that the first transmission electrode 1042 of the photosensitive sensor 104 can establish an electrical connection with the first conductive layer 105 through the first via 109, thereby forming a complete signal path from the photosensitive sensor 104 to the touch control integrated circuit (Touch IC). The touch integrated circuit will be abbreviated as touch chip below.

[0052] In some alternative implementations, such as Figure 1 and Figure 6 As shown, the first conductive layer 105 includes a plurality of first conductive portions extending along a first direction a and spaced apart. Each first conductive portion has a first sub-orthographic projection on the substrate 101, forming the horizontal coordinate portion for touch signal acquisition. The second conductive layer includes a plurality of second conductive portions extending along a second direction b and spaced apart. Each second conductive portion has a second sub-orthographic projection on the substrate 101, forming the vertical coordinate portion for touch signal acquisition. The second sub-orthographic projection overlaps with the first sub-orthographic projection, and the first direction a intersects with the second direction b. The first conductive layer 105 includes a plurality of first conductive portions extending along the first direction a. These conductive portions form regularly arranged first sub-orthographic projections on the substrate 101. This crisscrossing layout of conductive portions not only simplifies the acquisition and processing of touch signals but also achieves two-dimensional positioning of touch signals through the overlap in the first direction a and the second direction b, greatly improving the accuracy of laser touch. The regular arrangement and spacing of the conductive portions facilitate uniform acquisition of touch signals, reduce signal blind spots, and enhance the overall touch operation experience. It should be noted that the above horizontal and vertical coordinates do not refer to specific directions, but only represent coordinates in one direction.

[0053] For example, such as Figure 6 As shown, the intersection angle between the first direction a and the second direction b is a right angle, which is beneficial for the subsequent scanning of the touch chip.

[0054] In some alternative implementations, such as Figure 1 As shown, the display panel also includes a light-shielding layer 108 located on the side of at least one pixel driving circuit 103 facing away from the light-emitting unit 102. The addition of the light-shielding layer 108 effectively reduces the interference of external light on the pixel driving circuit 103, ensuring the stability and contrast of the display effect. The light-shielding layer 108 and the second transmission electrode 1043 are located on the same layer. The touch signal can be directly and efficiently transmitted to the touch chip through the second transmission electrode 1043 in the light-shielding layer 108, avoiding additional loss of the touch signal during transmission, thereby reducing the delay of touch operation. This not only improves the touch response speed and accuracy of the display panel, but also optimizes the display quality and energy efficiency.

[0055] In some alternative implementations, such as Figure 1 As shown, the display panel also includes a photosensitive layer comprising a plurality of photosensitive devices 1041 for capturing laser signals. The photosensitive devices 1041 being located on the same layer facilitates their integration. The driving circuit layer also includes a semiconductor layer having an active structure 10301 of the pixel driving circuit 103 and at least a portion of the photosensitive layer.

[0056] For example, such as Figure 1 As shown, the semiconductor layer includes an active structure 10301 and a photosensitive device 1041. A first conductive layer 105 is located on the side of the active structure 10301 closest to the substrate 101. A light-shielding layer 108 at least partially overlaps with the active structure 10301. The addition of the light-shielding layer 108 effectively prevents external ambient light from interfering with the pixel driving circuit 103, ensuring the clarity and contrast of the displayed image. Specifically, the active structure 10301 is the core part of the pixel driving circuit 103, responsible for controlling the display state of each pixel. However, external ambient light may affect the normal operation of the active structure 10301, resulting in poor display performance. To solve this problem, the light-shielding layer 108 is designed to overlap with the active structure 10301, which can effectively block ambient light and protect the active structure 10301 from interference.

[0057] For example, such as Figure 1 As shown, the photosensitive element 1041 in the light sensor 104 and the active structure 10301 in the pixel driving circuit 103 are located on the same layer. By placing the photosensitive element 1041 in the light sensor 104 and the active structure 10301 in the pixel driving circuit 103 on the same layer, the display panel is not only structurally simpler, but also significantly improved in touch response. Since signal transmission through multiple layers is not required, touch signals can reach the touch chip faster, thereby accelerating the recognition and execution speed of touch operations.

[0058] In some alternative implementations, such as Figure 1 As shown, the plurality of optical sensors 104 include a plurality of first sensors 10401 and a plurality of second sensors 10402. The first sensors 10401 have a first semiconductor material, which includes silicon and / or germanium. The second sensors 10402 have a second semiconductor material, which includes any one or more of gallium arsenide, indium phosphide and gallium nitride.

[0059] The photosensitive sensors 104 made of different materials exhibit significantly different light sensitivities in specific wavelength bands. The first semiconductor material includes silicon and / or germanium, with silicon and germanium having a photosensitive wavelength band between 400nm and 700nm, and being particularly sensitive between 650nm and 700nm, exhibiting high absorption in the red light band. The second semiconductor material includes gallium arsenide, indium phosphide, and gallium nitride, with photosensitive wavelengths between 495nm and 570nm, and high absorption in the green light band. This combination of materials and sensors allows the display panel to maintain the stability and sensitivity of its touch function even in low-light touch mode. Furthermore, the two sensors can detect lasers of different wavelengths, thereby allowing for the setting of functions corresponding to different wavelengths of laser light, enabling the completion of various touch functions, improving the versatility of screen touch control, and enhancing the practicality of the display panel.

[0060] In some alternative implementations, such as Figure 1 and Figure 6 As shown, multiple first sensors 10401 and multiple second sensors 10402 constitute multiple sensor groups distributed along a first direction a and a second direction b. Each sensor group corresponds one-to-one with a pixel driving circuit 103, and adjacent sensor groups are spaced apart. First sensors 10401 and second sensors 10402 within the same sensor group are adjacent to each other. First sensor 10401 is responsible for receiving and converting light signals of a first frequency, and second sensor 10402 is responsible for converting light signals of a second frequency. The first sensors 10401 and second sensors 10402 are grouped together and adjacent, ensuring uniform sensor distribution and seamless switching of sensor functions. This guarantees that when light signals of different frequencies illuminate the display panel, a corresponding sensor on the display panel receives the signal, allowing for rapid capture and processing regardless of the light signal frequency from which the touch operation originates. Simultaneously, the spaced distribution between adjacent sensor groups avoids mutual interference between sensor signals, enhancing the stability and reliability of touch operations.

[0061] For example, such as Figure 1As shown, the first sensor 10401 and the second sensor 10402 are light sensors 104 of different colors. The first transmission electrode 1042 of the multiple light sensors 104 is connected to the first conductive layer 105 through the first via 109. The first transmission electrode 1042 is in contact with the photosensitive device 1041. The second transmission electrode 1043 is a transparent electrode and is directly in contact with the photosensitive device 1041. The buffer layer 1003 includes a first buffer layer 10031 and a second buffer layer 10032. The first conductive layer 105 and the first transmission electrode 1042 are located in the second buffer layer 10032. The first transmission electrode 1042 of each light sensor 104 in the display area 1 is interconnected through the first conductive layer 105 and shares a common electrode. The second transmission electrode 1043 is located in the gate insulating layer 1031. The second transmission electrode 1043 of each light sensor 104 in the display area 1 is interconnected through the second conductive layer and shares a common electrode. Specifically, the second conductive layer is located in the reflective layer within the gate insulating layer 1031. A portion of the reflective layer is used for the connection between the light-emitting unit 102 and the pixel driving circuit 103, and a portion is used for the second conductive layer of the light sensor 104. A top view of the display area 1 is shown below. Figure 6 As shown.

[0062] In some alternative implementations, such as Figure 6 As shown, the first signal transmission line 1051 in the first conductive layer of the first sensor 10401 includes: a plurality of first sub-conductive portions 10511 extending along a first direction a and spaced apart; the first signal transmission line 1051 in the first conductive layer includes: a plurality of second sub-conductive portions 10512 extending along the first direction a and spaced apart, the first sub-conductive portions 10511 and the second sub-conductive portions 10512 located in the same sensor group are adjacent to each other; the second conductive layer in the first sensor 10401 includes a plurality of third sub-conductive portions 10611 extending along a second direction b and spaced apart, the second conductive layer in the second sensor 10402 includes a plurality of fourth sub-conductive portions 10612 extending along the second direction b and spaced apart, the third sub-conductive portions 10611 and the fourth sub-conductive portions 10612 located in the same sensor group are adjacent to each other.

[0063] In this embodiment, as Figure 6As shown, the first conductive layer 105 in the first sensor 10401 and the second sensor 10402 is designed with multiple first sub-conductive portions 10511 and second sub-conductive portions 10512 extending along the first direction a and spaced apart, forming a touch signal capturing network in the first direction a. The second signal transmission line 1061 in the second conductive layer includes a third sub-conductive portion 10611 and a fourth sub-conductive portion 10612 extending along the second direction b and spaced apart, forming a capturing network for touch signals in the second direction b. The adjacent design of the sub-conductive portions allows the touch signals to form dense capturing points in the first direction a and the second direction b, reducing signal blind spots and improving the recognition rate of touch operations. At the same time, the cross-distributed sub-conductive portions allow the touch chip to accurately scan to obtain the sensor position, thereby completing precise touch control of the display panel.

[0064] For example, such as Figure 6 As shown, the first direction a and the second direction b are perpendicular to each other to ensure accurate scanning by the touch chip.

[0065] In some alternative implementations, such as Figure 1 As shown, the display panel also includes a color filter substrate 107 located on the side of the light-emitting unit 102 away from the pixel driving circuit 103. The color filter substrate 107 has multiple filtering areas corresponding to multiple light sensors 104. In order to distinguish and optimize the processing of touch signals of different wavelengths, the display panel incorporates a color filter substrate 107 located on the side of the light-emitting unit 102 away from the pixel driving circuit 103 in its structural design. The light signal can be initially filtered by the color filter substrate 107 according to wavelength before entering the sensor, so that the first sensor 10401 can only obtain the light signal that the first sensor 10401 is sensitive to, and the second sensor 10402 can only obtain the light signal that the second sensor 10402 is sensitive to, thereby improving the targeting and efficiency of signal processing. Since the optical sensor 104 responds to a range of wavelengths rather than a single value, it will also produce a slight response when light of other wavelengths enters it, thus causing signal interference. In this embodiment, the color filter reduces interference and confusion during signal processing, enabling the first sensor 10401 and the second sensor 10402 to respond efficiently to light signals of specific wavelengths, further improving the accuracy and response speed of touch operation. At the same time, touch can also be effectively completed for lasers with poor monochromaticity through color filter filtering, reducing the requirements for lasers, thereby reducing production costs and providing users with a smoother and more accurate touch experience.

[0066] Example 2

[0067] The structure of the display panel in this embodiment is described in Embodiment 1, and will not be repeated here. The difference from Embodiment 1 is as follows:

[0068] like Figure 2 and Figure 6 As shown, the first conductive layer 105 has a first transmission electrode 1042 for capturing and transmitting touch signals. The first signal transmission line 1051 in the first conductive layer 105 includes the first transmission electrode 1042. The first transmission electrode 1042 can be connected to the first signal transmission line 1051 without additional connection, simplifying the connection structure and improving the transmission efficiency of touch signals. The display panel also includes a light-emitting device layer located on the side of the substrate 101 opposite to the pixel driving circuit 103. The light-emitting unit 102 is located in the light-emitting device layer, and the second conductive layer is a transparent conductive layer containing the pixel electrode and the second transmission electrode 1043 in the light-emitting unit 102. This embodiment ensures that the capture and processing of light signals can be performed directly in the light-emitting device layer without transmission through multiple layers of conductive materials, reducing signal attenuation and delay, and making touch operation more sensitive.

[0069] Specifically, such as Figure 2 As shown, the transparent conductive layer other than the pixel electrode of the light-emitting unit 102 constitutes the second signal transmission line 1061. The second signal transmission line 1061 includes the second transmission electrode 1043. The first signal transmission line 1051 in the first conductive layer 105 includes the first transmission electrode 1042. The photosensitive device 1041 is directly connected between the first transmission electrode 1042 and the second transmission electrode 1043.

[0070] In some alternative implementations, such as Figure 2 As shown, the first conductive layer 105 is located between the light-emitting device layer and the substrate 101. By placing the first conductive layer 105 in this position, the signal in the first transmission electrode 1042 passes through fewer or no other conductive or non-conductive layers.

[0071] For example, such as Figure 2 As shown, the first conductive layer 105 is disposed in the second planarization layer 1005.

[0072] For example, such as Figure 2 As shown, the active structure 10301 is located on the side of the first conductive layer 105 near the substrate 101, and the light-shielding layer 108 overlaps with the active structure 10301 at least partially.

[0073] For example, such as Figure 2As shown, the first sensor 10401 and the second sensor 10402 are light sensors 104 of different colors. The first transmission electrode 1042 is located in the first conductive layer 105 and is in contact with the photosensitive device 1041. The second transmission electrode 1043 is a transparent electrode and is directly in contact with the photosensitive device 1041. The first conductive layer 105, the first transmission electrode 1042, and the photosensitive device 1041 are located in the second planarization layer 1005. The first transmission electrode 1042 of each light sensor 104 in the display area 1 is interconnected through the first conductive layer 105 and shares a common electrode. The second transmission electrode 1043 is located in the pixel definition layer 1006. The second transmission electrode 1043 of each light sensor 104 in the display area 1 is interconnected through the second conductive layer and shares a common electrode. Specifically, the second conductive layer is located in the reflective layer of the pixel definition layer 1006. A portion of the reflective layer is used for the connection between the light-emitting unit 102 and the pixel driving circuit 103, and a portion is used for the second conductive layer of the light sensor 104. A top view of the display area 1 is shown below. Figure 6 As shown.

[0074] Example 3

[0075] The structure of the display panel in this embodiment is described in Embodiment 1, and will not be repeated here. The difference from the embodiment is as follows:

[0076] like Figure 3 As shown, the first sensor 10401 and the second sensor 10402 are light sensors 104 of the same color but different frequencies. The first transmission electrode 1042 is connected to the first conductive layer 105 through the first via 109. The first transmission electrode 1042 is in contact with the photosensitive device 1041. The second transmission electrode 1043 is a transparent electrode. The second conductive layer is located in the light-shielding layer 108. Part of the light-shielding layer 108 forms the second signal transmission line. The second transmission electrode 1043 is directly in contact with the photosensitive device 1041. The first conductive layer 105 is located in the first buffer layer 10031. The second transmission electrode 1043, the photosensitive device 1041, and the active structure 10301 are all located in the gate insulating layer 1031. The top view of display area 1 is shown below. Figure 7As shown, a first signal transmission line 1051 is arranged along the second direction b, and a second signal transmission line 1061 is arranged along the first direction a. A photosensitive sensor is provided in the overlapping area of ​​the first signal transmission line 1051 and the second signal transmission line 1061, including a first transmission electrode (not shown) in the first signal transmission line 1051 and a second transmission electrode (not shown) in the second signal transmission line 1061. A photosensitive device (not shown) is located between the two transmission electrodes, and a light-emitting unit 102 is located in the gap between the transmission electrodes. Furthermore, the arrangement direction of the electrodes may also include: the first signal transmission line arranged along the first direction a and the second signal transmission line arranged along the second direction b; this application does not specifically limit this.

[0077] For example, such as Figure 7 As shown, the intersection angle between the first direction a and the second direction b is a right angle, which is beneficial for the subsequent scanning of the touch chip.

[0078] Example 4

[0079] The structure of the display panel in this embodiment is described in Embodiment 1, and will not be repeated here. The difference from Embodiment 1 is as follows:

[0080] like Figure 4 As shown, the second transmission electrode 1043 is located on the side of the first transmission electrode 1042 facing away from the substrate 101. The projection of the light-emitting unit 102 onto the bottom surface of the substrate 101 is a first orthographic projection, and the projection of the second transmission electrode 1043 onto the bottom surface of the substrate 101 is located between adjacent first orthographic projections. The projections of the light-emitting units 102 onto the bottom surface of the substrate 101 define the positions of the display pixels, while the projections of the second transmission electrode 1043 are located between these projections of the light-emitting units 102. This ensures that the collection of touch signals and the generation of display signals do not interfere with each other, avoids spatial overlap between touch signals and display signals, reduces crosstalk between signals, and improves the accuracy of touch recognition.

[0081] Specifically, in the design of the display panel, the layout of the light-emitting units directly affects the display resolution and brightness. To ensure display quality while providing efficient touch functionality, the second transmission electrode 1043 is positioned in the gap between the projections of the light-emitting units. When a laser touch signal is generated, the signal passes directly through the space between the display pixels to reach the second transmission electrode of the light sensor, unaffected by the display units. Subsequently, the signal is transmitted to the touch chip via the second transmission electrode. By analyzing the signal strength and position, the touch chip can accurately identify the location of the laser touch point, achieving high-precision touch operation recognition even when the touch point is located between two light-emitting pixels.

[0082] In some alternative implementations, such as Figure 4 As shown, the pixel driving circuit 103 includes an active structure 10301. A first conductive layer 105 is located on the side of the active structure 10301 closest to the substrate 101, and the first conductive layer 105 includes a light-shielding structure, namely a light-shielding layer 108, which at least partially overlaps with the active structure 10301 of the pixel driving circuit 103. The addition of the light-shielding structure effectively prevents external ambient light from interfering with the pixel driving circuit 103, ensuring the clarity and contrast of the displayed image. Specifically, the active structure 10301 is the core part of the pixel driving circuit 103, responsible for controlling the display state of each pixel. However, external ambient light may affect the normal operation of the active structure 10301, resulting in poor display effect. To solve this problem, the light-shielding structure is designed to overlap with the active structure 10301, which can effectively block ambient light and protect the active structure 10301 from interference.

[0083] And, as Figure 4 As shown, the display panel also includes a light-shielding layer 108 located on the side of at least one pixel driving circuit 103 away from the light-emitting unit 102. The light-shielding layer 108 is located in the first conductive layer 105 and connected along a first direction or a second direction via a first transmission electrode 1042. External light interference is a significant factor affecting display performance, especially in the design of laser touch screens, where additional consideration must be given to touch signal transmission and display quality maintenance. Therefore, the light-shielding layer 108 in the display panel is used to block the direct impact of backlight and ambient light on the pixel driving circuit 103. Furthermore, by placing the light-shielding layer 108 in the first conductive layer 105, the first signal transmission line is located in the light-shielding layer 108 and connected using the first transmission electrode 1042, allowing the touch signal to smoothly pass through the light-shielding layer 108 and be transmitted to the touch chip to complete subsequent touch operations on the screen, thereby improving the overall performance of the display panel.

[0084] For example, such as Figure 4 As shown, the light-shielding layer 108, except for the portion corresponding to the pixel driving circuit 103, constitutes the first signal transmission line. The first signal transmission line is connected to the first transmission electrode 1042, which reduces signal loss. By setting the first signal transmission layer as a partial light-shielding layer 108, the transmission of touch signals is ensured while reducing process steps. In addition, due to the function of the light-shielding layer 108 itself, the interference of external light is also reduced.

[0085] For example, such as Figure 4As shown, the first sensor 10401 and the second sensor 10402 are light sensors 104 of the same color but different frequencies. The first transmission electrode 1042 is located in the first conductive layer 105 and is in contact with the photosensitive device 1041. The first transmission electrodes 1042 of each light sensor 104 in the display area 1 are interconnected and share a single electrode. The light-shielding layer 108 is located in the first conductive layer 105 of the buffer layer 1003. The second transmission electrode 1043 is a transparent electrode and is directly in contact with the photosensitive device 1041. The second transmission electrode 1043 of each photosensitive device 1041 in the display area 1 is independently set and is not interconnected. The second transmission electrode 1043, the photosensitive device 1041, and the active structure 10301 are all located in the gate insulating layer 1031. Specifically, the first transmission electrode 1042 and the light-shielding layer 108 are both located in the first conductive layer 105. A portion of the first conductive layer 105 serves as the light-shielding layer 108 for back shading of the active structure 10301, and a portion serves as the first transmission electrode 1042 of the photosensor 104. The light-shielding layer 108 has a perforated mesh structure. The second transmission electrode 1043 located above each photosensitive device 1041 and the pixel electrode in the light-emitting unit 102 are located in different layers, as shown in the top view. Figure 8 As shown, the light sensor is directly connected to the touch chip. Figure 8 Each second transmission electrode 1043 in the figure corresponds to a first transmission electrode (not shown in the figure), which is connected to the touch chip (not shown in the figure) in the display panel through the connection shown in the figure. The first transmission electrodes share a single electrode, saving one electrode manufacturing step, and the touch chip can obtain the position of photocurrent generation at any time without scanning.

[0086] Example 5

[0087] The structure of the display panel in this embodiment is described in Embodiment 1, and will not be repeated here. The difference from Embodiment 1 is as follows:

[0088] like Figure 5As shown, the first transmission electrode 1042 is connected to the first conductive layer 105 through the second via 110. The display panel also includes a light-emitting device layer located on the side of the substrate 101 opposite to the pixel driving circuit 103. The light-emitting unit 102 is located in the light-emitting device layer. The light-emitting device layer includes a transparent conductive layer, in which the pixel electrode of the light-emitting unit 102 and the second transmission electrode 1043 are located. In this embodiment, the first transmission electrode 1042 is connected to the first conductive layer 105 through the second via 110, providing a stable vertical transmission path for the touch signal and ensuring that the signal of the first transmission electrode 1042 is transmitted to the first conductive layer 105. The light-emitting device layer has a transparent conductive layer, in which the pixel electrode of the light-emitting unit 102 and the second transmission electrode 1043 are located. The photosensitive device 1041 between the transparent conductive layer and the first transmission electrode 1042 ensures that the light signal is converted into a touch signal, while the transparent electrode ensures that the light signal can pass through the second transmission electrode 1043 and ensures the electrical connection of the photosensitive device 1041. The second transmission electrode 1043 and the pixel electrode of the light-emitting unit 102 are located on the same layer, which reduces the number of layers in the display panel, reduces the number of process steps, and lowers the production cost.

[0089] For example, such as Figure 5 As shown, the transparent conductive layer other than the pixel electrode of the light-emitting unit 102 constitutes the second signal transmission line 1061. The second signal transmission line 1061 includes the second transmission electrode 1043, which shortens the length of the signal transmission path and reduces the loss during signal transmission. The light-shielding layer 108 except for the part corresponding to the pixel driving circuit 103 constitutes the first signal transmission line 1051. The first transmission electrode 1042 is connected to the first signal transmission line 1051 through the second via 110.

[0090] In some alternative implementations, such as Figure 5 As shown, the first transmission electrode 1042 is located between the light-emitting device layer and the first conductive layer 105, meaning that the first transmission electrode 1042 and the first conductive layer 105 are connected through the first signal transmission line 1051. There is an overlapping area between the first conductive layer 105 and the second transmission electrode 1043, including the photosensitive device 1041. Through the arrangement of the first overlapping area, the areas where the first transmission electrode 1042 at both ends of the photosensitive device 1041 is connected to the first signal transmission line 1051 in the first conductive layer 105, and the areas where it is connected to the second transmission electrode 1043 and the second signal transmission line 1061 in the second conductive layer, are connected through the photosensitive device 1041. This tightly couples the photosensitive device 1041 with the signal transmission path, thereby realizing the generation and transmission of touch signals and achieving the purpose of touch operation of the screen.

[0091] In some alternative embodiments, the display panel also includes a driving circuit layer located on one side of the substrate 101, with pixel driving circuits 103 located in the driving circuit layer. These circuits are responsible for controlling the display state of each pixel. The second transmission electrode 1043 is a transparent electrode located in the driving circuit layer. The transparent electrode ensures that the transmission of light signals is not limited even in a high-resolution display panel.

[0092] In this embodiment, as Figure 5 As shown, the signal transmission path is as follows: the light signal passes through the second transmission electrode 1043 to the photosensitive device 1041, the photosensitive device 1041 converts the light signal into an electrical signal, transmits the electrical signal to the first transmission electrode 1042, and then transmits it through the third via to the first conductive layer 105, and then transmits it to the touch chip through the first signal transmission line in the horizontal first conductive layer 105. The touch chip generates a touch signal to control the pixel driving circuit 103 to perform display.

[0093] For example, such as Figure 5 As shown, the pixel driving circuit 103 includes an active structure 10301, and the photosensitive device 1041 in the light sensor 104 and the active structure 10301 in the pixel driving circuit 103 are located on different layers.

[0094] For example, such as Figure 5 As shown, the first sensor 10401 and the second sensor 10402 are light sensors 104 of the same color but different frequencies. The first transmission electrode 1042 is connected to the first conductive layer 105 through the second via 110. The first transmission electrode 1042 is in contact with the photosensitive device 1041. The first transmission electrode 1042 and the photosensitive device 1041 are located in the second planarization layer 1005. The first transmission electrode 1042 of each light sensor 104 in the display area 1 is connected to each other through the first conductive layer 105 and shares a common electrode. The light-shielding layer 108 is located in the first conductive layer 105 in the buffer layer 1003. The second transmission electrode 1043 is a transparent electrode. The second transmission electrode 1043 is directly in contact with the photosensitive device 1041. The second transmission electrode 1043 of each photosensitive device 1041 in the display area 1 is set independently and is not connected to each other. The second transmission electrode 1043 is located in the pixel definition layer 1006. Specifically, in display area 1, a portion of the first conductive layer 105 serves as a light-shielding layer 108 to back-shield the active structure 10301 in the light-emitting area, and a portion is used to connect with the first transmission electrode 1042 in the light sensor 104. The first conductive layer 105 has a hollow mesh structure. The second transmission electrode 1043 located above each photosensitive device 1041 is located in the same layer as the pixel electrode in the light-emitting unit 102, as shown in the top view. Figure 8 As shown.

[0095] According to the second aspect of this application, such as Figure 9 As shown, a laser touch display device is provided, including a touch chip 20, a display driver chip 30 and the aforementioned display panel 10. The touch chip 20 is electrically connected to the electrodes of a plurality of light sensors in the display panel 10, and the display driver chip 30 is electrically connected to the touch chip 20 and a plurality of pixel driving circuits in the display panel 10.

[0096] In this embodiment, as Figure 9 As shown, the touch chip 20 is directly electrically connected to the electrodes of multiple light sensors in the display panel 10, and is responsible for processing the laser signals processed by the light sensors and recognizing user commands. The display driver chip 30 is electrically connected to the touch chip 20 and multiple pixel driving circuits in the display panel 10, respectively, and is responsible for processing the touch feedback received from the touch chip 20 and controlling the image refresh of the display panel 10, ensuring that touch operations can be quickly reflected on the display screen, realizing touch and display response. Due to the high directionality and monochromaticity of laser, the touch experience of the large-size display panel 10 is significantly improved in scenarios such as education, meetings, and entertainment, allowing users to operate without close proximity, reducing eye fatigue, and expanding the scope of touch applications.

[0097] According to a third aspect of this application, a light-sensing touch device is provided, such as... Figure 10 and Figure 11 As shown, the device includes a laser pointer 201 and the aforementioned display panel 10. The laser pointer 201 is used to emit a first laser or a second laser towards the display panel 10. Specifically, the light sensor in the display panel 10 performs a first operation upon receiving the first laser; and performs a second operation upon receiving the second laser. The first and second lasers are lasers of different colors or lasers of the same color but different frequencies. This application provides rich input methods for touch operation through the design of the first and second lasers. Users can select different laser pointers 201 according to their operational needs to achieve diverse touch modes.

[0098] In this embodiment, as Figure 10 and Figure 11 As shown, by emitting lasers with different characteristics through the laser pointer 201, the light sensor in the display panel 10 can identify the type of laser based on the color or frequency of the laser and transmit the identified laser type to the touch chip. The touch chip identifies and selects the type of touch operation. In this way, without complex additional signal processing, diverse touch functions can be achieved directly by switching the laser pointer 201, simplifying the operation process and improving the immediacy and user experience of touch operation.

[0099] For example, this method is also applicable to various display environments, including but not limited to bright sunlight or dim indoor lighting, because the strong directionality and high brightness of the laser signal enable the light sensor 104 to accurately capture touch signals under various lighting conditions, further expanding the application scenarios of the technology.

[0100] For example, the first laser corresponds to the click and pointer modes, and the second laser corresponds to the line drawing and drag modes.

[0101] For example, the first laser and the second laser are laser pointers 201 with the same color but different laser frequencies. Figure 10 As shown in (a).

[0102] For example, the first laser and the second laser are laser pointers 201 of different colors. Figure 10 As shown in (b).

[0103] According to a fourth aspect of this application, a light-sensing touch control method is provided, such as... Figure 12 As shown, the method applied in the aforementioned laser touch display device includes:

[0104] S1. When the target light sensor in the laser touch display device generates a sensing signal, the touch chip generates a control signal corresponding to the sensing signal. The target light sensor is at least one light sensor in the display panel.

[0105] S2. The display driver chip controls the switching of the target pixel driving circuit according to the control signal. The target pixel driving circuit is at least one of multiple pixel driving circuits and is the pixel driving circuit corresponding to the target light sensor.

[0106] The optical sensing touch method provided in this application directly generates a sensing signal from a light sensor, which is then quickly converted into a control signal by a touch chip, reducing signal processing time and improving the immediacy of touch operation. During step S1, the target light sensor is the one that receives the light signal. Simultaneously, the control signal directly acts on the target pixel driving circuit corresponding to the light sensor, controlling the corresponding pixel driving circuit to drive the corresponding light-emitting unit, thus completing the touch display. Through the optical sensing touch method in the above embodiments, the display panel can achieve high-precision recognition and instant response to long-distance touch (light signal, here using laser) operations, significantly improving the touch experience of large-size screens in educational, conferencing, and other scenarios.

[0107] In some optional implementations, the touch chip includes a first touch chip that generates a control signal corresponding to the sensing signal, including: when the target light sensor generates a first sensing signal, the first touch chip generates a first control signal corresponding to the first sensing signal, so that the display driver chip controls the switching of the target pixel driving circuit according to the first control signal, wherein the first sensing signal includes the position information of the target light sensor and the frequency information of the light sensed by the target light sensor.

[0108] In this embodiment, to further refine and optimize the recognition and processing of touch signals, the touch chip is designed to include a first touch chip responsible for processing the first sensing signal. When the target light sensor receives a laser signal, the first sensing signal carries the position information of the target light sensor and the frequency information of the sensed light. Based on this information, the first touch chip generates a first control signal, instructing the display driver chip to control the switching state of the target pixel driving circuit, thereby realizing specific touch functions, such as dot pointer or line drawing operations. By centrally processing the first sensing signal through the first touch chip, the touch operation type can be quickly determined based on the frequency information of the signal, avoiding signal processing confusion and misidentification.

[0109] In some optional embodiments, the touch chip includes a second touch chip that generates a control signal corresponding to the sensing signal, including: when the target light sensor group generates a second sensing signal, the second touch chip generates a second control signal corresponding to the second sensing signal, so that the display driver chip controls the switching of the target pixel driving circuit according to the second control signal, wherein the second sensing signal includes position information of the target light sensor group and color information of the light sensed by the target light sensor group.

[0110] In this embodiment, with light sensors sensitive to two colors of light, the color information of the signal plays a decisive role in distinguishing the type of touch operation. By centrally processing the second sensing signal containing color information through the second touch chip, the type of touch operation can be accurately determined. The position information of the target light sensor group is used to accurately locate the position of the touch operation on the display panel, ensuring the accurate execution of the touch function. The two colors of light have a significant frequency difference compared to different frequencies of light of the same color (within the visible light range), which enables the light sensor to identify more accurately, reduces the probability of signal misidentification, and thus improves the accuracy of long-distance touch.

[0111] Specifically, the display panel provided in this application is also applicable to other types of display panels, including but not limited to OLED, LCD and Mini LED, and this application does not make any specific limitations.

[0112] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0113] 1) This application integrates a light sensor array arranged along the first and second directions in the display panel, parallel to the substrate, to ensure no interference with the display. The light sensor receives laser signals using a transparent electrode in the third direction (perpendicular to the substrate). The first transmission electrode is connected along the first and second directions through signal lines in the first conductive layer, achieving efficient signal transmission. This facilitates the transmission of the sensing signal generated by the light sensor to an external control chip to control the pixel driving circuit so that the light-emitting unit produces a corresponding response, thereby completing the light signal touch control of the screen. Since the light signal can be emitted towards the screen at a certain distance, long-distance touch control is achieved, solving the problem of inconvenience of close-range screen touch control in related technologies.

[0114] 2) This application also utilizes a laser pointer to emit a laser beam onto the display panel. The laser beam emitted by the laser pointer is captured by a light sensor, and the touch chip analyzes the signal to control the corresponding pixel driving circuit, causing the light-emitting unit at a specific location to respond, thus achieving precise remote operation. This design leverages the directionality of the laser and the full coverage of the light sensor array to achieve a long-distance touch effect, enhancing the interactive experience of large-screen displays.

[0115] 3) By setting two frequencies of the laser pointer (different colors or different frequencies of the same color) and two light sensors corresponding to those frequencies, the touch chip generates control signals for two functions based on the sensing signals of the two sensors, thereby controlling the switching of the pixel driving circuit. This enables different functions to be corresponding to different laser frequencies, thus achieving multiple controls on the screen.

[0116] 4) By setting the color filter substrate, other stray light is filtered to prevent it from being misidentified by the light sensor, reducing interference and confusion in the signal processing process. This enables the sensor to respond efficiently to light signals of specific wavelengths, further improving the accuracy and response speed of touch operation. At the same time, for light source signals with poor monochromaticity (laser), touch can also be effectively completed through the filtering of the color filter, reducing the requirements for the light source and thus reducing production costs.

[0117] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0118] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that, The display area includes a substrate, multiple light-emitting units, multiple pixel driving circuits, and multiple light sensors. The pixel driving circuits are electrically connected to the light-emitting units, and the multiple light sensors are arranged in an array along a first direction and a second direction, which are parallel to the surface of the substrate. The display panel further includes a first conductive layer located on one side of the substrate. The light sensor includes a photosensitive device and a first transmission electrode and a second transmission electrode located on both sides of the photosensitive device along a third direction. The first conductive layer has a first signal transmission line. The first transmission electrodes of the plurality of light sensors are connected along the first direction or the second direction through the first signal transmission line. The third direction is perpendicular to the surface of the substrate.

2. The display panel according to claim 1, characterized in that, The display panel further includes a second conductive layer located on the side of the first conductive layer away from the substrate. The second conductive layer has a second transmission electrode and a second signal transmission line. The second transmission electrodes of the plurality of light sensors are connected through the second signal transmission line. There is an overlapping area between the first conductive layer and the second conductive layer. The overlapping area includes the photosensitive device.

3. The display panel according to claim 2, characterized in that, The first transmission electrode is located between the first conductive layer and the photosensitive device, and the first transmission electrode is connected to the first conductive layer through a first via.

4. The display panel according to claim 1, characterized in that, The second transmission electrode is located on the side of the first transmission electrode away from the substrate. The projection of the light-emitting unit on the bottom surface of the substrate is a first orthographic projection, and the projection of the second transmission electrode on the bottom surface of the substrate is located between adjacent first orthographic projections.

5. The display panel according to claim 4, characterized in that, The pixel driving circuit includes an active structure, the first conductive layer is located on the side of the active structure close to the substrate, and the first conductive layer includes a light-shielding structure, the light-shielding structure at least partially overlapping the active structure of the pixel driving circuit.

6. The display panel according to claim 4, characterized in that, The display panel further includes a light-shielding layer located on the side of at least one of the pixel driving circuits opposite to the light-emitting unit. The light-shielding layer is located in the first conductive layer and is connected along the first direction or the second direction through the first transmission electrode.

7. The display panel according to claim 4, characterized in that, The pixel driving circuit includes an active structure, and the photosensitive element of the light sensor and the active structure of the pixel driving circuit are located on the same layer.

8. The display panel according to claim 4, characterized in that, The first transmission electrode is connected to the first conductive layer through a second via. The display panel also includes a light-emitting device layer located on the side of the substrate away from the pixel driving circuit. The light-emitting unit is located in the light-emitting device layer. The light-emitting device layer includes a transparent conductive layer, in which the pixel electrode of the light-emitting unit and the second transmission electrode are located.

9. The display panel according to claim 8, characterized in that, The first transmission electrode is located between the light-emitting device layer and the first conductive layer, and there is an overlapping region between the first conductive layer and the second transmission electrode, the overlapping region including the photosensitive device.

10. The display panel according to claim 2, characterized in that, The first conductive layer includes a plurality of first conductive portions extending along the first direction and spaced apart, each of the first conductive portions having a first sub-orthographic projection on the substrate. The second conductive layer includes a plurality of second conductive portions extending along the second direction and spaced apart. Each second conductive portion has a second sub-orthographic projection on the substrate. The second sub-orthographic projection overlaps with the first sub-orthographic projection. The first direction intersects with the second direction.

11. The display panel according to claim 3, characterized in that, The display panel further includes a driving circuit layer located on one side of the substrate, the pixel driving circuit is located in the driving circuit layer, and the second transmission electrode is a transparent electrode located in the driving circuit layer.

12. The display panel according to claim 11, characterized in that, The display panel further includes a light-shielding layer located on the side of at least one of the pixel driving circuits facing away from the light-emitting unit, the light-shielding layer being located on the same layer as the first transmission electrode.

13. The display panel according to claim 11, characterized in that, The display panel further includes a photosensitive layer comprising a plurality of the photosensitive devices, and the driving circuit layer further includes a semiconductor layer having an active region of the pixel driving circuit and at least a portion of the photosensitive layer.

14. The display panel according to claim 2, characterized in that, The first conductive layer has the first transmission electrode, and the display panel further includes a light-emitting device layer located on the side of the substrate away from the pixel driving circuit. The light-emitting unit is located in the light-emitting device layer, and the second conductive layer is a transparent conductive layer having the pixel electrode in the light-emitting unit and the second transmission electrode.

15. The display panel according to claim 14, characterized in that, The first conductive layer is located between the light-emitting device layer and the substrate.

16. The display panel according to claim 2, characterized in that, The plurality of optical sensors include a plurality of first sensors and a plurality of second sensors, wherein the first sensors have a first semiconductor material, the first semiconductor material including silicon and / or germanium, and the second sensors have a second semiconductor material, the second semiconductor material including any one or more of gallium arsenide, indium phosphide and gallium nitride.

17. The display panel according to claim 16, characterized in that, Multiple first sensors and multiple second sensors constitute multiple sensor groups distributed along a first direction and a second direction. Each sensor group corresponds to a pixel driving circuit, and adjacent sensor groups are distributed at intervals. The first sensors and second sensors located in the same sensor group are adjacent to each other.

18. The display panel according to claim 17, characterized in that, The first signal transmission line connected to the first sensor includes a plurality of first sub-conductive portions extending along a first direction and spaced apart, and the first signal transmission line connected to the second sensor includes a plurality of second sub-conductive portions extending along a first direction and spaced apart, wherein the first sub-conductive portions and the second sub-conductive portions located in the same sensor group are adjacent to each other; The second signal transmission line connected to the first sensor includes a plurality of third sub-conductive portions extending along a second direction and spaced apart, and the second signal transmission line connected to the second sensor includes a plurality of fourth sub-conductive portions extending along a second direction and spaced apart, wherein the third sub-conductive portions and the fourth sub-conductive portions located in the same sensor group are adjacent to each other.

19. The display panel according to claim 17, characterized in that, The display panel also includes a color filter substrate located on the side of the light-emitting unit away from the pixel driving circuit, and the color filter substrate has multiple filter areas corresponding to the multiple light sensors respectively.

20. A laser touch display device, characterized in that, The device includes a display panel, a touch chip, and a display driver chip as described in any one of claims 1 to 19, wherein the touch chip is electrically connected to the electrodes of a plurality of light sensors in the display panel, and the display driver chip is electrically connected to the touch chip and a plurality of pixel driving circuits in the display panel, respectively.

21. A light-sensing touch control device, characterized in that, Includes a laser pointer and a display panel according to any one of claims 1 to 19, wherein the laser pointer is used to emit a first laser or a second laser toward the display panel, wherein: The light sensor in the display panel performs a first operation upon receiving the first laser beam. The optical sensor performs the first operation upon receiving the second laser beam; The first laser and the second laser are lasers of different colors or lasers of the same color but different frequencies.

22. A light-sensing touch control method, characterized in that, Applied to the laser touch display device of claim 20, the method includes: When the target light sensor in the laser touch display device generates a sensing signal, the touch chip generates a control signal corresponding to the sensing signal, wherein the target light sensor is at least one light sensor in the display panel; The display driver chip controls the switching of the target pixel driving circuit according to the control signal. The target pixel driving circuit is at least one of a plurality of pixel driving circuits, and the target pixel driving circuit is the pixel driving circuit corresponding to the target light sensor.

23. The optical sensing touch control method according to claim 22, characterized in that, The touch chip includes a first touch chip, which generates a control signal corresponding to the sensing signal, including: When the target light sensor generates a first sensing signal, the first touch chip generates a first control signal corresponding to the first sensing signal, so that the display driver chip controls the switching of the target pixel driving circuit according to the first control signal. The first sensing signal includes the position information of the target light sensor and the frequency information of the light sensed by the target light sensor.

24. The optical sensing touch control method according to claim 22, characterized in that, The touch chip includes a second touch chip, which generates a control signal corresponding to the sensing signal, including: When the target light sensor group generates a second sensing signal, the second touch chip generates a second control signal corresponding to the second sensing signal, so that the display driver chip controls the switching of the target pixel driving circuit according to the second control signal. The second sensing signal includes the position information of the target light sensor group and the color information of the light sensed by the target light sensor group.

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