Display panel, optical pen, display device and interaction system

Abstract

According to the display panel, the optical pen, the display device and the interaction system, the surface of the first electrode is arranged to be of the optical diffuse reflection structure to increase diffuse reflection light rays, so that the light ray transmittance of the display panel is improved, the light ray quantity of the edge of the coding pattern in the coding pattern layer is improved, the contrast ratio of the coding pattern is improved, and the display effect is improved. And thus, the recognition accuracy of the coding pattern in the coding pattern layer is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel, an optical pen, a display device and an interactive system. Background Art

[0002] With the diversification of online education and office space, and the popularization of portable electronic products in business or education, people have higher demands for human-computer interaction, and the demand for stylus is more obvious. An optical pen is a stylus that uses light as a communication medium. Users can hold the optical pen to record information or perform touch operations on the display panel.

[0003] However, how to accurately obtain the contact position of the optical pen on the display panel is a problem that needs to be solved urgently. Summary of the invention

[0004] In view of this, the purpose of this application is to propose a display panel, an optical pen, a display device and an interactive system to solve or partially solve the above problems.

[0005] Based on the above objectives, in a first aspect, the present application provides a display panel, including:

[0006] substrate substrate;

[0007] A plurality of sub-pixels arranged in an array are located on the substrate, each of the sub-pixels comprises a light-emitting element, the light-emitting element comprises a first electrode, and an optical diffuse reflection structure is arranged on a surface of the first electrode away from the substrate;

[0008] The coding position layer is located on the side of the multiple sub-pixels away from the base substrate, and includes a coding pattern layer, which includes multiple coding patterns, and the orthographic projections of the multiple coding patterns on the base substrate and the orthographic projections of the multiple sub-pixels on the base substrate do not overlap.

[0009] In a second aspect of the present application, an optical pen used in conjunction with the display panel described in the first aspect is provided, comprising a housing, a pen core, a light source, an image sensor, and a processing module arranged in the housing, wherein one end of the pen core extends to the outside of the housing to form a pen tip of the optical pen;

[0010] The light source is used to emit light of a preset wavelength to the display panel when the pen tip contacts the display panel;

[0011] The image sensor is used to capture an image including a plurality of coded patterns of the display panel;

[0012] The processing module is used to obtain corresponding position information according to the multiple coding patterns in the image.

[0013] In a third aspect of the present application, a display device is provided, comprising the display panel as described in the first aspect.

[0014] In a fourth aspect of the present application, an interactive system is provided, comprising the display panel as described in the first aspect and the optical pen as described in the second aspect.

[0015] From the above, it can be seen that a display panel, an optical pen, a display device and an interactive system provided by the present application increase the diffusely reflected light by setting the surface of the first electrode as an optical diffuse reflection structure, thereby improving the light transmittance of the display panel, thereby increasing the amount of light at the edge of the coding pattern in the coding pattern layer, improving the contrast of the coding pattern, and further improving the accuracy of recognizing the coding pattern in the coding pattern layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of an exemplary optical pen according to an embodiment of the present application is shown.

[0018] Figure 2 A schematic diagram of a display panel used in conjunction with an optical pen according to an embodiment of the present application is shown.

[0019] Figure 3 A top view of a pixel group of an exemplary display panel according to an embodiment of the present application is shown.

[0020] Figure 4 A schematic diagram showing an exemplary optical pen used in conjunction with a display panel according to an embodiment of the present application is shown.

[0021] Figure 5 A schematic diagram showing another exemplary optical pen used in conjunction with a display panel according to an embodiment of the present application is shown.

[0022] Figure 6 A schematic diagram of an exemplary display panel according to an embodiment of the present application is shown.

[0023] Fig. 7A A schematic diagram of an exemplary first electrode according to an embodiment of the present application is shown.

[0024] Figure 7B A schematic diagram of another exemplary first electrode according to an embodiment of the present application is shown.

[0025] Fig. 8A A schematic diagram of a simulation of an exemplary optical pen working at an angle of 90° to a display panel according to an embodiment of the present application is shown.

[0026] Figure 8B A schematic diagram of a simulation of an exemplary optical pen according to an embodiment of the present application working at an angle of 45° to a display panel is shown.

[0027] Fig. 9 A schematic diagram of an exemplary display device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0029] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] Figure 1 FIG. 1 is a schematic structural diagram of an exemplary optical pen 100 according to an embodiment of the present application.

[0031] like Figure 1 As shown, the optical pen 100 may include a housing 102 and a core 104, a light source 106, an image sensor 108 and a processing module 110 disposed in the housing 102. One end of the core 104 extends to the outside of the housing 102 to form a tip 112 of the optical pen 100.

[0032] The light source 106 may include a plurality of light sources, which may be arranged in an array. The light source 106 may emit light of a preset wavelength. In some embodiments, the light source 106 may emit infrared light, in other words, the preset wavelength is the wavelength of infrared light. As an optional embodiment, the light source in the light source 106 may be a light emitting diode (LED). By adjusting the intensity of light emitted by each light source in the light source 106, the light field intensity distribution of the light emitted by the light source 106 in the array may be changed. Therefore, the light source 106 may be a modulated light source, which may be flexibly modulated into the light field intensity distribution according to actual needs.

[0033] The wavelength of light that the image sensor 108 can receive may cover the above-mentioned preset wavelength. For example, the light source 106 emits infrared light of the preset wavelength, and the wavelength of light that the image sensor 108 can receive may be 750 nm to 1100 nm.

[0034] The optical pen 100 may further include a circuit module 114 disposed in the housing 102, and the circuit module 114 may be used to modulate the light of a preset wavelength emitted by the light source 106 into structured light according to a preset coding pattern. Specifically, the circuit module 114 may input the preset coding pattern into the light source 106, and the light source 106 may emit light of a preset wavelength according to the coding pattern, so that the light field intensity distribution of the emitted light is the same as the coding pattern.

[0035] The optical pen 100 may further include a storage module 116, a communication module 118, a pressure sensing module 120, and a battery module 122 disposed in the housing 102. The storage module 116 may store relevant data of the processing module 110, and the relevant data may include an image processed by the processing module 110 and a contact position of the pen tip on the display panel 200. The memory of the storage module 116 may be 256Mb, 512Mb, etc. The communication module 118 may communicate with an external device. The pressure sensing module 120 may detect pressure, and may determine whether the pen tip is in contact with the display panel 200 according to the magnitude of the pressure. The battery module 122 may supply power to other modules in the optical pen 100. The battery module 122 may be a 200mAH lithium battery, etc.

[0036] In some embodiments, the processing module 110 can send the data stored in the storage module 116 to the intelligent terminal through the communication module 118. The intelligent terminal can be a mobile phone, a tablet computer, a desktop, a laptop, a handheld computer, a notebook computer, an ultra mobile personal computer (UltraMobile Personal Computer), a netbook, a personal digital assistant (personal digital assistant), etc., and the embodiments of the present application do not specifically limit this.

[0037] Figure 2 A schematic diagram of a display panel 200 used in conjunction with an optical pen 100 according to an embodiment of the present application is shown.

[0038] like Figure 2 As shown, the display panel 200 may include a substrate 202 and a pixel defining layer 204. The pixel defining layer 204 defines a plurality of sub-pixels, and the plurality of sub-pixels are located on the substrate 202. Each sub-pixel may include a light-emitting element 206, and the light-emitting element 206 may include a light-emitting layer 2061 and a first electrode 2062 and a second electrode 2063 located on both sides of the light-emitting layer 2061. In some embodiments, the first electrode 2062 may be an anode of the light-emitting element 206, and / or the first electrode 2062 may be made of titanium oxide / silver / titanium oxide (ITO / Ag / ITO) material, and / or the thickness of the first electrode 2062 may be 15-20 nm. Exemplarily, the thickness of the first electrode 2062 may be 15 nanometers (nm), or 20 nm, or other sizes, which are not limited in the present application. The pixel defining layer 204 may be formed of an organic substance. In this way, light may be reflected on a surface made of ITO / Ag / ITO material.

[0039] The light emitting layer 2061 may include one or more of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL).

[0040] The display panel 200 may further include a planarization layer 208 located on the base substrate 202 and the pixel defining layer 204 . The planarization layer 208 may be formed of materials such as organic matter, which is not limited in the present application.

[0041] A thin film encapsulation layer (TFE) may be provided on the light emitting element 206. The thin film encapsulation layer may seal the light emitting element 206 and prevent moisture, etc. from flowing into the light emitting element 206 from the outside. The thin film encapsulation layer may include a first inorganic encapsulation layer 210, an organic encapsulation layer 212, and a second inorganic encapsulation layer 214. The first inorganic encapsulation layer 210 may prevent moisture, oxygen, etc. from penetrating into the light emitting element 206. The organic encapsulation layer 212 may improve the flatness of the thin film encapsulation layer, and the organic film may be formed of a liquid organic material. The second inorganic encapsulation layer 214 may be the same or similar to the material of the first inorganic encapsulation layer 210, and the second inorganic encapsulation layer 214 may completely cover the organic encapsulation layer 212.

[0042] A touch function layer 216 may be formed on the second inorganic encapsulation layer 214 , and the touch function layer 216 may be provided with a touch metal line 2161 .

[0043] A coding pattern layer may be formed on the touch function layer 216. The coding pattern layer may include a plurality of coding patterns 218, and the orthographic projections of the plurality of coding patterns 218 on the base substrate 202 and the orthographic projections of the plurality of sub-pixels on the base substrate 202 do not overlap, thereby preventing the plurality of coding patterns 218 from blocking the light emitted by the plurality of sub-pixels.

[0044] The coding pattern 218 may be used to identify position information of a corresponding pixel group.

[0045] In some embodiments, the display panel 200 further includes a photoresist layer 222, a polarizer layer 224, an optical adhesive layer 226 and a cover plate 228 stacked in sequence on the side of the coding pattern layer away from the base substrate 202. The cover plate 228 can be made of a colorless and transparent polyimide (PI) film or glass.

[0046] Figure 3 A top view of a pixel group 300 of an exemplary display panel 200 according to an embodiment of the present application is shown.

[0047] like Figure 3 As shown, the light emitting element 206 may include a plurality of pixel units 302 , each pixel unit 302 may include a plurality of sub-pixels, for example, the plurality of sub-pixels may include a red sub-pixel 3021 , a green sub-pixel 3022 , and a blue sub-pixel 3023 .

[0048] The coding pattern 218 can be set according to the shape of each sub-pixel in the pixel unit. Figure 3 The pixel unit 302 shown in the figure has three sub-pixels of different shapes, and a coding pattern 218 surrounding each sub-pixel is formed based on the shape of each sub-pixel. In some embodiments, the positive projection of the coding pattern 218 on the substrate substrate 202 is annular, and the positive projection of the coding pattern 218 on the substrate substrate 202 surrounds the positive projection of at least one sub-pixel on the substrate substrate 202. In this way, the coding pattern 218 can identify the position of the pixel group while avoiding blocking the light emitted by multiple sub-pixels. It can be understood that the ring shape can be a circular ring, a rectangular ring, etc., and this application is not limited to this.

[0049] By defining different coding patterns 218 for identification, different coding patterns 218 can be defined for each pixel group of the display panel 200, and the position information of the corresponding pixel group on the display panel 200 can be identified by different coding patterns 218. Specifically, the coding pattern 218 can absorb light of a preset wavelength, for example, the preset wavelength light is infrared light, when the display panel 200 is touched with an optical pen 100 that can emit infrared light, the emitted infrared light can be absorbed by the coding pattern 218 to form a dark spot, and the optical pen 100 can collect an image containing multiple coding patterns 218 of the display panel 200 through the image sensor 108, so as to obtain the position information of the pixel group of the area touched by the optical pen 100 by identifying the coding pattern 218 in the image.

[0050] Back to Figure 1 The processing module 110 may obtain corresponding position information according to the multiple coding patterns 218 in the image. For example, the processing module 110 may identify the contact position of the optical pen 100 on the display panel according to the multiple coding patterns 218 in the image.

[0051] Figure 4 A schematic diagram showing an exemplary optical pen 100 used in conjunction with a display panel 200 according to an embodiment of the present application is shown.

[0052] like Figure 4 As shown, the user can hold the optical pen 100 to touch or write on the display panel 200. When the pen tip 112 of the optical pen 100 contacts the display panel 200, the light source 106 can emit light of a preset wavelength to the display panel 200. When the light of the preset wavelength is incident on the display panel 200, a portion of the light will generate specular reflection on the surface 402 of the display panel 200, and the light incident on the coding pattern 218 in the coding pattern layer 404 will be absorbed by the coding pattern 218, and the image sensor 108 will detect the light intensity of the display panel 200.

[0053] If the user holds the optical pen 100 to record information on the display panel 200, the contact track of the optical pen 100 on the display panel 200 can be obtained according to the contact position. The contact track can represent the handwriting of the user when recording the information, and the information recorded by the user can be obtained according to the handwriting; if the user holds the optical pen 100 to touch the display panel 200, the touch area of ​​the optical pen 100 on the display panel 200 can be obtained according to the contact position, and the touch instruction triggered by the user can be identified according to the touch area, and then the corresponding touch operation is performed according to the touch instruction.

[0054] Since the surface 402 of the display panel 200 is relatively smooth, the light emitted by the light source 106 reaches the display panel 200 and generates specular reflection on the surface of the display panel 200, resulting in insufficient light received by the image sensor 108 and relatively weak reflected light, which leads to poor contrast at the edge of the coding pattern 218, affecting the image acquisition effect, and ultimately failing to accurately identify the contact position of the optical pen 100 on the display panel 200. In addition, the light emitted by the light-emitting layer 2061 of the display panel 200 may also be received by the image sensor 108, which also affects the image acquisition effect, and thus failing to accurately obtain the contact position of the optical pen 100 on the display panel 200.

[0055] In view of this, if Figure 2 As shown, in some embodiments, a coding enhancement layer 220 may be provided between a plurality of sub-pixels and the coding pattern layer. Exemplarily, the coding enhancement layer 220 may be located on a side of the coding pattern layer close to the base substrate 202. The coding enhancement layer 220 and the coding pattern layer may constitute a coding position layer. In some embodiments, the coding pattern layer may absorb light of a preset wavelength to form a dark spot, and the coding enhancement layer 220 may reflect light of a preset wavelength to increase the brightness of the light received by the image sensor 108. In turn, the image sensor 108 may obtain a coding pattern 218 with higher contrast and clarity, thereby obtaining the position information of the pixel group of the area touched by the optical pen 100.

[0056] Figure 5 A schematic diagram showing another exemplary optical pen 100 used in conjunction with a display panel 200 according to an embodiment of the present application is shown.

[0057] like Figure 5 As shown, in some embodiments, the coding enhancement layer 220 can be set as an uneven diffuse reflection layer 502. After the light emitted by the light source 106 enters the display panel 200, a part of the light will be diffusely reflected on the diffuse reflection layer 502, so that the image sensor 108 can receive more light. The other part of the light entering the coding pattern layer will be absorbed by the coding pattern 218 in the coding pattern layer 404. In this way, the diffuse reflection layer 502 makes the reflected light more sufficient, improves the contrast difference at the edge of the coding pattern 218, and thus can improve the accuracy of identifying the contact position of the optical pen 100 on the display panel 200.

[0058] However, the diffuse reflection layer 502 may have a problem of too high diffuse reflection rate affecting the recognition of the coding pattern 218 (the coding pattern can be recognized normally when the diffuse reflection rate is above 10%). At the same time, the setting of the coding enhancement layer 220 (diffuse reflection layer 502) will block the light, affecting the transmittance of the light emitted by the light-emitting layer 2061 in the light-emitting direction of the display panel 200, thereby affecting the normal use of the display panel 200 by the user.

[0059] In view of this, the present application provides a display panel, an optical pen, a display device and an interactive system, which increases the diffusely reflected light by setting the surface of the first electrode as an optical diffuse reflection structure, thereby improving the light transmittance of the display panel, thereby increasing the amount of light at the edge of the coding pattern in the coding pattern layer, improving the contrast of the coding pattern, and further improving the accuracy of recognizing the coding pattern in the coding pattern layer.

[0060] Figure 6 A schematic diagram of an exemplary display panel 600 according to an embodiment of the present application is shown.

[0061] like Figure 6 As shown, the display panel 600 may include a substrate 202, a plurality of sub-pixels arranged in an array, and a coding position layer. The plurality of sub-pixels arranged in an array may be located on the substrate 202, each sub-pixel may include a light-emitting element 602, the light-emitting element 602 may include a first electrode 6022, and in some embodiments, an optical diffuse reflection structure 6024 may be provided on the surface of the first electrode 6022 away from the substrate 202. The coding position layer may be located on a side of the plurality of sub-pixels away from the substrate 202, the coding position layer may include a coding pattern layer, the coding pattern layer may include a plurality of coding patterns 218, and the orthographic projections of the plurality of coding patterns 218 on the substrate 202 and the orthographic projections of the plurality of sub-pixels on the substrate 202 do not overlap.

[0062] By setting the surface of the first electrode as an optical diffuse reflection structure to increase the diffuse reflected light, the transmittance of the light of the display panel is improved, thereby increasing the amount of light at the edge of the coding pattern in the coding pattern layer, improving the contrast of the coding pattern, and further improving the accuracy of recognizing the coding pattern in the coding pattern layer.

[0063] In some embodiments, the optical diffuse reflection structure 6024 may be designed on the entire surface of the first electrode to increase the contact area between the optical diffuse reflection structure 6024 and the light, so that more light can be diffusely reflected on the optical diffuse reflection structure 6024 .

[0064] In some embodiments, the optical diffuse reflection structure 6024 can cause light of a preset wavelength emitted by the optical pen 100 used in conjunction with the display panel 600 to be diffusely reflected on the optical diffuse reflection structure 6024, so that the image sensor 108 of the optical pen 100 can receive more light and thereby collect more effective information, thereby improving the optical pen 100's recognition accuracy of the coding pattern 218.

[0065] The optical diffuse reflection structure 6024 may make the surface of the first electrode 6022 uneven, so that the light irradiated on the optical diffuse reflection structure 6024 may be diffusely reflected. In some embodiments, the optical diffuse reflection structure 6024 may include a protrusion.

[0066] Fig. 7A A schematic diagram of an exemplary first electrode 6022 according to an embodiment of the present application is shown. Figure 7B FIG. 6 is a schematic diagram showing another exemplary first electrode 6022 according to an embodiment of the present application.

[0067] like Fig. 7A and Figure 7B As shown, in some embodiments, the first electrode 6022 may include a protrusion for forming an optical diffuse reflection structure 6024, and the protrusion may include a cuboid 702 or a hemispherical body 704. The cuboid and hemispherical structures are more convenient in terms of manufacturing process. However, in the embodiment of the present application, the shape of the protrusion is not limited to the cuboid array and the hemispherical array, and other similar structures that can generate diffuse reflection should be included in the protection scope of the present application.

[0068] Back to Figure 6 In some embodiments, the coding position layer may further include a coding enhancement layer 220 located between the plurality of sub-pixels and the coding pattern layer. The setting of the optical diffuse reflection structure 6024 increases the diffuse reflection light, thereby reducing the reflectivity of the coding enhancement layer 220, thereby improving the light transmittance of the display panel 600. The coding enhancement layer 220 and the optical diffuse reflection structure 6024 cooperate with each other to increase the contrast of the coding pattern 218, thereby improving the accuracy of the recognition of the coding pattern 218.

[0069] It should be noted that the display panel 600 in the embodiment of the present application may not be provided with the coding enhancement layer 220, thereby eliminating the influence of the coding enhancement layer 220 on the transmittance of the display panel 600. The optical diffuse reflection structure 6024 alone may also improve the contrast of the coding pattern 218 and improve the accuracy of the recognition of the coding pattern 218.

[0070] In some embodiments, the coding pattern layer is configured to absorb light of a preset wavelength, and the coding enhancement layer 220 is configured to reflect light of a preset wavelength. In this way, part of the light of the preset wavelength emitted by the optical pen 100 can be absorbed by the coding pattern layer to form a dark spot, and the other part can be reflected, thereby increasing the brightness of the light received by the image sensor 108, so that the image sensor 108 can obtain the coding pattern 218 with higher contrast and clarity, thereby obtaining the position information of the pixel group of the area touched by the optical pen 100.

[0071] In some embodiments, the orthographic projection of the coding pattern layer on the base substrate 202 is located within the orthographic projection of the coding enhancement layer 220 on the base substrate 202. In this way, the coding enhancement layer 220 can reflect light other than the coding pattern 218, thereby improving the contrast of the coding pattern, effectively improving the clarity of the coding pattern, and thus improving the accuracy of coding pattern recognition.

[0072] It should be noted that the coding enhancement layer 220 in the embodiment of the present application can be a whole film layer, which is only used to illustrate the specific implementation method of the present application. The present application does not specifically limit the actual structure of the coding enhancement layer. Those skilled in the art can select an appropriate coding enhancement layer according to actual application requirements, with the design criteria of reflecting light of a preset wavelength other than the coding pattern and improving the contrast and clarity of the coding pattern, which will not be repeated here.

[0073] In some embodiments, the display panel 600 may further include a filling layer 604, and the protrusions 6024 may include a gap 6041. The filling layer 604 fills the gap 6041, and the filling layer 604 may include a transparent material. In this way, the filling layer 604 can fill the gap between the first electrodes 6022, thereby ensuring the flatness and stability of other film layers disposed on the first electrodes 6022. At the same time, the transparent filling layer 604 will not block the light, and the light can still be irradiated to the gap 6041 and then reflected.

[0074] Fig. 8A A schematic diagram of a simulation of an exemplary optical pen 100 according to an embodiment of the present application working at an angle of 90° to a display panel 600 is shown. Figure 8B A schematic diagram of a simulation of an exemplary optical pen 100 according to an embodiment of the present application working at an angle of 45° to the display panel 600 is shown.

[0075] As described above, in some embodiments, the orthographic projection of the encoding pattern 218 on the substrate 202 is ring-shaped, and the orthographic projection of the encoding pattern 218 on the substrate 202 surrounds the orthographic projection of at least one sub-pixel on the substrate 202 .

[0076] The working scenario where the optical pen 100 and the display panel 600 are at 90 degrees may be an operation in which a user clicks on the display panel 600 using the optical pen 100. Fig. 8A As shown, using the display panel 600 provided in the embodiment of the present application, when the optical pen 100 and the display panel 600 are at 90 degrees, a relatively clear annular outline of the coding pattern 218 can be seen in the image captured by the image sensor 108 .

[0077] The operation of the optical pen 100 and the display panel 600 at 45 degrees may allow the user to write on the display panel 600 using the optical pen 100. Figure 8BAs shown, using the display panel 600 provided in the embodiment of the present application, when the optical pen 100 and the display panel 600 are at 45 degrees, a relatively clear annular outline of the coding pattern 218 can also be seen in the image captured by the image sensor 108 .

[0078] The reflectivity of the coding enhancement layer must be at least 10%, and the transmittance of the display panel is less than 90%, which has a greater impact on the display. Through simulation, it can be seen that the transmittance of the display panel provided by the embodiment of the present application is less than 90%, and the reflectivity of the coding enhancement layer is above 10%, which can obtain a clearer image of the coding pattern.

[0079] The present application also provides a display device, Fig. 9 A schematic diagram of an exemplary display device 901 according to an embodiment of the present application is shown.

[0080] like Fig. 9 As shown, the display device 904 may include a display panel 9011. The display panel 9011 is any embodiment of the display panel or an arrangement or combination of the embodiments. The display device 904 is a product with an image display function, such as a display, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable camcorder, a viewfinder, a navigator, a vehicle, a large-area wall, a home appliance, an information query device (such as business query equipment and monitors of departments such as e-government, banks, hospitals, and electricity, etc.).

[0081] The embodiment of the present application also provides an interactive system, including the display panel 600 and the optical pen 100 described in any of the above embodiments. The optical pen 100 can be connected to the display panel 600 for communication. The optical pen 100 is used to obtain the contact position of its pen tip on the display panel 600 and transmit the contact position to the display device 904. The display device 904 can obtain the handwriting position of the optical pen 100 on the display panel 600 according to the contact position, control the display panel 600 to display the handwriting position, and obtain the handwriting of the optical pen 100 on the display panel 600 by displaying a series of handwriting positions. In addition, the display device 904 can determine the corresponding touch operation according to the received contact position and perform the touch operation. For example, according to the contact position, it is determined that the optical pen 100 has selected a control, which is equivalent to clicking the control. At this time, the touch operation to be performed when the control is clicked can be determined, and the touch operation can be performed.

[0082] The present application provides a display panel, an optical pen, a display device and an interactive system, which increase the diffusely reflected light by setting the surface of the first electrode as an optical diffuse reflection structure, thereby improving the light transmittance of the display panel, thereby increasing the amount of light at the edge of the coding pattern in the coding pattern layer, improving the contrast of the coding pattern, and further improving the accuracy of recognizing the coding pattern in the coding pattern layer.

[0083] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0084] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0085] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0086] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A display panel, comprising: substrate substrate; A plurality of sub-pixels arranged in an array are located on the substrate, each of the sub-pixels comprises a light-emitting element, the light-emitting element comprises a first electrode, and an optical diffuse reflection structure is arranged on a surface of the first electrode away from the substrate; The coding position layer is located on the side of the multiple sub-pixels away from the base substrate, and includes a coding pattern layer, which includes multiple coding patterns, and the orthographic projections of the multiple coding patterns on the base substrate and the orthographic projections of the multiple sub-pixels on the base substrate do not overlap.

2. The display panel according to claim 1, wherein: The optical diffuse reflection structure is configured as follows: The light of a preset wavelength emitted by the optical pen used in conjunction with the display panel is diffusely reflected on the optical diffuse reflection structure.

3. The display panel according to claim 1, wherein: The first electrode includes a protrusion for forming the optical diffuse reflection structure, and the protrusion includes a cuboid and / or a hemisphere.

4. The display panel according to claim 2, wherein: The coding position layer further includes a coding enhancement layer located between the plurality of sub-pixels and the coding pattern layer.

5. The display panel according to claim 4, wherein: The coding pattern layer is configured to absorb light of the preset wavelength, and the coding enhancement layer is configured to reflect light of the preset wavelength.

6. The display panel according to claim 4, wherein: The orthographic projection of the coding pattern layer on the base substrate is located within the orthographic projection of the coding enhancement layer on the base substrate.

7. The display panel according to claim 1, wherein: The orthographic projection of the coding pattern on the substrate is ring-shaped, and the orthographic projection of the coding pattern on the substrate surrounds the orthographic projection of at least one sub-pixel on the substrate.

8. The display panel according to claim 3, wherein: The display panel further includes a filling layer, the protrusions include spaces between them, the filling layer fills the spaces, and the filling layer includes a transparent material.

9. The display panel according to claim 1, wherein: The first electrode is an anode of the light-emitting element; and / or The first electrode comprises ITO / Ag / ITO material; and / or The thickness of the first electrode is 15-20 nanometers.

10. An optical pen used in conjunction with the display panel according to any one of claims 1 to 9, comprising a housing and a pen core, a light source, an image sensor and a processing module arranged in the housing, wherein one end of the pen core extends to the outside of the housing to form a pen tip of the optical pen; The light source is used to emit light of a preset wavelength to the display panel when the pen tip contacts the display panel; The image sensor is used to capture an image including a plurality of coded patterns of the display panel; The processing module is used to obtain corresponding position information according to the multiple coding patterns in the image.

11. A display device, comprising the display panel according to any one of claims 1 to 9.

12. An interactive system, comprising the display panel according to any one of claims 1 to 9 and the optical pen according to claim 10.

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