Display module, display device, handwriting pen and interaction system

Abstract

The utility model discloses a display module, a display device, a handwriting pen and an interaction system, the display module of one embodiment comprises a luminescent device layer and a micro lens layer which are arranged on a substrate, the luminescent device layer comprises a plurality of pixel units arranged in an array, and the plurality of pixel units form a plurality of pixel groups according to a preset touch identification unit; the micro lens layer comprises a plurality of micro lenses which are arranged in an array and are used for representing different coding information, and the plurality of micro lenses form a micro lens group which corresponds to each pixel group and is used for identifying the position information of the corresponding pixel group; the orthographic projection of the diamond type micro lens on the substrate is not overlapped with the orthographic projection of the opening area of the sub-pixel of the pixel unit on the substrate, and the micro lens comprises at least one slope forming a preset angle with the substrate. According to the display module provided by the utility model, the reflection performance of the display module on the incident light with the preset wavelength is effectively improved through the plurality of diamond-type micro lenses with different coding information.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a display module, display device, stylus, and interactive system. Background Technology

[0002] With the diversification of online education and work environments, portable electronic products are becoming increasingly popular in business and education, leading to higher demands for human-computer interaction, particularly for pen writing. While capacitive and electromagnetic pens are commonly used for human-computer interaction in related technologies, the touch modules integrated into display devices increase their power consumption in practical applications. Utility Model Content

[0003] To address at least one of the aforementioned problems, a first embodiment of this utility model provides a display module, comprising a light-emitting device layer and a microlens layer sequentially stacked on a substrate, wherein...

[0004] The light-emitting device layer includes multiple pixel units arranged in an array. The multiple pixel units form multiple pixel groups according to a preset touch recognition unit. Each pixel unit includes multiple sub-pixels, and each sub-pixel includes an opening area.

[0005] The microlens layer includes an array of microlenses used to characterize different encoded information. The multiple microlenses form a microlens group corresponding to each pixel group and used to identify the position information of the corresponding pixel group. The orthographic projection of the diamond-shaped microlens on the substrate does not overlap with the orthographic projection of the opening area of ​​the sub-pixel on the substrate. The microlens includes at least one sloped surface at a preset angle to the substrate.

[0006] For example, in some embodiments of the display module provided in this application, the microlens is a diamond-shaped microlens, and the diamond-shaped microlens characterizes the encoded information according to at least one of the microlens height, radius and mirror slope.

[0007] For example, in some embodiments of the display module provided in this application, the mirror slope of the diamond-shaped microlens is greater than or equal to 40° and less than or equal to 50°, the cross-section of the diamond-shaped microlens parallel to the substrate is octagonal, and the height of the diamond-shaped microlens is greater than or equal to 5μm and less than or equal to 10μm.

[0008] For example, in some embodiments of the display module provided in this application, the spacing between adjacent pixel units is less than or equal to 80 μm, and the diameter of the diamond-shaped microlens is smaller than the spacing.

[0009] A gap is formed between multiple adjacent pixel units, and the orthogonal projection of the diamond-shaped microlens on the substrate falls into the orthogonal projection of the gap on the substrate.

[0010] For example, in some embodiments of the display module provided in this application, the pixel group includes m×n pixel units, where m>4 and n>4;

[0011] The microlens group comprises (m-2)×(n-2) microlenses.

[0012] For example, in some embodiments of the display module provided in this application, the microlens layer further includes a filling layer covering the plurality of microlenses, wherein the refractive index of the filling layer is less than the refractive index of the microlenses.

[0013] For example, in some embodiments of the present application, the display module includes a light-emitting device layer, a microlens layer, a polarizer, and a cover plate stacked on the substrate.

[0014] For example, in some embodiments of the present application, the display module includes a light-emitting device layer, a color filter layer, a microlens layer, and a cover plate stacked on the substrate.

[0015] A second embodiment of the present invention provides a display device, including a display module, a first communication device, and a controller as described in the first embodiment, wherein...

[0016] The controller is configured to perform touch operations on the stylus based on position information received by the first communication device from the stylus used in conjunction with the display device, wherein the position information is generated by the display module in response to the touch operations on the stylus.

[0017] The third embodiment of this utility model provides a stylus for use with the display device described in the second embodiment, comprising a light source, a receiving unit, a processor, and a second communication device, wherein...

[0018] The light source is used to emit light of a preset wavelength;

[0019] The receiving unit includes an optical lens and an image sensor. The optical lens is used to receive reflected light generated by the microlens layer of the display device in response to the touch operation of the stylus. The image sensor is used to identify the encoded information of the reflected light. The microlens layer includes a plurality of microlenses, and each microlens includes at least one sloped surface at a preset angle to the substrate of the display device.

[0020] The processor is configured to obtain the position information corresponding to the touch operation based on the encoding information and a preset mapping table, and transmit the position information to the display device through the second communication device.

[0021] For example, in some embodiments of the stylus provided in this application, the light emission angle of the light source is greater than or equal to 20° and less than or equal to 30°, the diameter of the light source is less than or equal to 1mm, and the wavelength of the light with the preset wavelength is 850nm.

[0022] For example, in some embodiments of the stylus provided in this application, the focal length of the optical lens is less than or equal to 3mm, the object-side field of view of the optical lens is less than or equal to 15°, the working wavelength of the optical lens is 850nm, and the dispersion spot radius of the optical lens is less than or equal to 0.8μm.

[0023] The fourth embodiment of this utility model provides an interactive system, including a display device as described in the second embodiment and a stylus as described in the third embodiment.

[0024] The beneficial effects of this utility model are as follows:

[0025] This invention addresses existing problems by providing a display module, display device, stylus, and interactive system. The display module incorporates a microlens layer on the light-emitting side of the light-emitting device layer. By utilizing the slope of multiple microlenses with different encoded information to reflect incident light of a preset wavelength, the reflectivity of the display module is improved. This allows the stylus used with the display module to perform position recognition based on the reflected light, enabling touch operation based on optical communication. This effectively reduces the power consumption of touch modules used in related technologies, thus overcoming the problems existing in the prior art and possessing practical application value. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This diagram illustrates the structure of a display module according to one embodiment of the present invention.

[0028] Figure 2 This diagram shows a structural block diagram of an interactive system according to an embodiment of the present invention.

[0029] Figure 3 This diagram shows a structural block diagram of a display device according to an embodiment of the present invention;

[0030] Figure 4 This diagram shows a structural block diagram of the stylus according to one embodiment of the present invention;

[0031] Figure 5 A flowchart illustrating the interaction method of one embodiment of this utility model is shown;

[0032] Figure 6 This diagram illustrates the structure of a stylus according to one embodiment of the present invention.

[0033] Figure 7 This diagram shows the optical path of the stylus according to one embodiment of the present invention.

[0034] Figure 8a A top view of a diamond-shaped microlens according to an embodiment of the present invention is shown;

[0035] Figure 8b A side view of a diamond-shaped microlens according to an embodiment of the present invention is shown;

[0036] Figure 8c This diagram illustrates the imaging process of a diamond-shaped microlens according to an embodiment of the present invention.

[0037] Figure 9 This diagram shows the optical path of the diamond-shaped microlens, light source, and receiving unit according to one embodiment of the present invention.

[0038] Figure 10 This is a top view of the microlens assembly of the display device according to an embodiment of the present invention;

[0039] Figure 11 This diagram shows a top view of the microlens assembly according to an embodiment of the present invention;

[0040] Figure 12 This diagram illustrates the layer structure of a display module according to an embodiment of the present invention.

[0041] Figure 13 A schematic diagram of the structure of the display module according to another embodiment of the present invention is shown. Detailed Implementation

[0042] To more clearly illustrate this utility model, the preferred embodiments and accompanying drawings will be used for further description. Similar components in the drawings are indicated by the same reference numerals. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of this utility model.

[0043] It should be noted that the terms "on," "formed on," and "set on" used in this document can indicate that one layer is directly formed or set on another layer, or that one layer is indirectly formed or set on another layer, meaning that there are other layers between the two layers. In this document, unless otherwise stated, the term "located on the same layer" means that two layers, components, elements, or parts can be formed through the same patterning process, and that these two layers, components, elements, or parts are generally formed of the same material. In this document, unless otherwise stated, the description of "patterning process" generally includes steps such as photoresist coating, exposure, development, etching, and photoresist stripping. The description of "one-time patterning process" refers to a process that uses a single photomask to form patterned layers, components, elements, etc.

[0044] In related technologies, capacitive pens and electromagnetic pens are commonly used to achieve touch operation. However, setting up a touch module in a display device affects the power consumption of the display device and limits its battery life.

[0045] In response to the problems existing in the relevant technologies, such as Figure 1 As shown, one embodiment of this utility model provides a display module, including a light-emitting device layer 11 and a microlens layer 13 sequentially stacked on a substrate 10, wherein...

[0046] The light-emitting device layer 11 includes a plurality of pixel units 114 arranged in an array. The plurality of pixel units form a plurality of pixel groups according to a preset touch recognition unit. Each pixel unit includes a plurality of sub-pixels, and each sub-pixel includes an opening area.

[0047] The microlens layer 13 includes an array of microlenses 131 arranged to represent different encoded information. The microlenses form a microlens group corresponding to each pixel group and used to identify the position information of the corresponding pixel group. The orthographic projection of the diamond-shaped microlens 131 on the substrate 10 does not overlap with the orthographic projection of the opening area of ​​the sub-pixel on the substrate 10. The microlens includes at least one sloped surface at a preset angle to the substrate.

[0048] This embodiment addresses the power consumption issue in implementing touch functionality in display devices. By setting a microlens layer on the light-emitting side of the light-emitting device layer of the display module, and utilizing the slope of multiple microlenses with different encoding information to reflect incident light of a preset wavelength, the reflectivity of the display module can be improved. This allows the stylus used with the display module to identify the position based on the reflected light, thereby realizing touch operation based on optical communication. This effectively reduces the power consumption of the display module while it is displaying normally.

[0049] In a specific example, such as Figure 2The diagram shows the interactive system of this application, including a display device and a stylus. Wherein, as... Figure 3 The diagram shows a display device, including a display module, a first communication device, and a controller as described in this embodiment. The controller is used to execute touch operations of the stylus based on position information received by the first communication device from a stylus used with the display device. The position information is formed by the display module in response to the touch operations of the stylus. Figure 4 The image shows a stylus. In this embodiment, the stylus is an infrared stylus, comprising a light source for emitting infrared light, a receiving unit for receiving reflected light generated by a touch operation of the stylus in response to a touch operation on the display device, and for identifying encoded information based on the reflected light, a processor for obtaining position information of the touch operation based on the encoded information and a pre-set mapping table, and a second communication device for transmitting the position information to the display device. Figure 5 As shown, this example uses a display device and a stylus to implement touch functionality to further illustrate the display module of this embodiment, specifically including the following steps:

[0050] The first step involves the stylus responding to the user's touch operation on the display device, with the stylus's light source emitting light of a preset wavelength.

[0051] In this embodiment, the infrared stylus is activated based on user input, emitting infrared light through a light source while simultaneously interacting with the touch display device. Specifically, as shown... Figure 6As shown, the stylus includes a pen body 21 and a pen tip 22. A light source 211, a receiving unit 212, a processor 213, and a second communication device 214 are disposed on the pen body 21. When the infrared stylus performs touch operations on the display device, the light source 211 emits light of a preset wavelength, which is infrared light with a wavelength of 850nm. The light emission angle of the light source 211 is greater than or equal to 20° and less than or equal to 30°, and the diameter of the light source is less than or equal to 1mm. The receiving unit 212 includes an optical lens and an image sensor. The focal length of the optical lens is less than or equal to 3mm, the operating wavelength is 850nm, the object-side field of view is less than or equal to 15°, and it can receive light within a 5*5mm object-side range. The blur radius of the optical lens is less than or equal to 0.8μm. The minimum pixel size of the image sensor is less than or equal to 1μm, thereby achieving higher resolution for more accurate identification of light signals. The second communication device 214 is a device for communicating between the infrared stylus and the first communication device of the display device, such as a communication device that implements wireless network transmission. This application does not specifically limit the second and first communication devices. Those skilled in the art should select appropriate communication devices according to actual application needs, with the design principle being to realize the communication function between the stylus and the communication device. Further details are omitted here. The processor 213 is used to determine the corresponding location information based on the encoded information output by the receiving unit and control the second communication device to transmit the location information.

[0052] It is worth noting that this embodiment does not specifically limit the structure of the optical lens of the receiving unit. For example, the optical lens can be a three-element lens, or it can be a spherical lens, an aspherical lens, or a freeform surface lens, with the design criteria being to meet the above-mentioned optical indicators and be able to receive the light reflected by the display device. This will not be elaborated further here.

[0053] In the second step, in response to the illumination of light of a preset wavelength, the display device reflects the light of the preset wavelength through a plurality of microlenses in the microlens layer of the display device to form reflected light. The microlenses include at least one sloped surface at a preset angle to the substrate.

[0054] In this embodiment, the display device improves the reflectivity of the display module by setting a microlens layer on the light-emitting side of the light-emitting device layer and using the slope of multiple microlenses with different encoding information to reflect incident light of a preset wavelength.

[0055] like Figure 6 As shown, when the infrared stylus is in use, the pen tip 22 forms an angle α with the display device 100, where the angle α is greater than or equal to 40° and less than or equal to 50°. Figure 7As shown, the infrared light L emitted by the light source 211 is incident on the display device. The specular reflection light L' formed by the reflective components such as the surface of the display device and the internal metal layer of the display device is not within the receiving range of the optical lens of the receiving unit 212. The light that can enter the receiving range of the optical lens is the diffuse reflection light L” formed on the display device by the infrared light L. However, the light energy of the diffuse reflection light L” is less than that of the specular reflection light L’. Furthermore, the diffuse reflection light L” is oriented in different directions, and only a portion of the diffuse reflection light L” can enter the receiving range of the optical lens. This results in even less light energy of the reflected light entering the optical lens, which in turn leads to a smaller light energy of the light signal received by the optical lens of the receiving unit and a decrease in the recognition accuracy of the light signal by the image sensor.

[0056] For this application scenario and Figure 7 The optical path diagram shown is provided in this embodiment. Considering the difficulty in finding materials with strong diffuse reflection, a microlens layer is set on the light-emitting side of the light-emitting device layer. Multiple microlenses with different encoding information are used to reflect incident light of a preset wavelength by their slopes. That is, by using the slopes of multiple microlenses with different encoding information to reflect incident light in all directions, strong specular reflection is achieved. For example, the slopes of the microlenses are used to reflect incident infrared light to form reflected light with high light energy, thereby improving the reflectivity of the display module so that the receiving unit of the infrared stylus can accurately identify the encoding information of the reflected light.

[0057] Specifically, such as Figure 1 As shown, the microlens in this embodiment improves the light energy of the reflected light by specular reflection of incident light through its sloped surface. Further, in an optional embodiment, the microlens is a diamond-shaped microlens. Diamond-shaped microlenses have good symmetry, for example, symmetry with respect to a central axis, and all have regular octagonal cross-sections. The mirror surfaces are symmetrically and uniformly arranged to facilitate reflection of incident light from different directions under the same conditions. Specifically, the multiple diamond-shaped microlenses 131 included in the microlens layer 13 have different encoding information. For example, the diamond-shaped microlens 131 characterizes the encoding information based on at least one of the microlens' height, radius, and mirror slope. That is, this embodiment utilizes the height, radius, and mirror slope of the diamond-shaped microlenses to form multiple reflecting surfaces, thereby improving the light energy of the reflected light by specular reflection of incident light. Compared to ordinary microlenses, the diamond-shaped microlens used in this embodiment can not only reflect incident light from different directions to a more concentrated specific direction and range, but also significantly improve reflection efficiency.

[0058] In a specific example, four types of diamond-shaped microlenses are included, each with different coding information. For instance, the coding information for the four diamond-shaped microlenses is 00, 01, 10, and 11, respectively. The diamond-shaped microlens with coding information 00 has a radius of 10 μm, a height of 9 μm, and a mirror slope of 45°; the diamond-shaped microlens with coding information 01 has a radius of 10 μm, a height of 5 μm, and a mirror slope of 45°; the diamond-shaped microlens with coding information 10 has a radius of 13 μm, a height of 9 μm, and a mirror slope of 45°; and the diamond-shaped microlens with coding information 11 has a radius of 15 μm, a height of 7 μm, and a mirror slope of 45°. Figure 8a The image shows top views of four types of diamond-shaped microlenses. As can be seen from the top views, the radii of the four types of diamond-shaped microlenses are not unique, and each has a different top view pattern; for example... Figure 8b The image shows a side view of four types of diamond-shaped microlenses. As can be seen from the side view, the height and mirror slope of the four types of diamond-shaped microlenses are not unique, and each type of diamond-shaped microlens has a different side view pattern.

[0059] It is worth noting that the display module of the display device in this application includes multiple pixel units arranged in an array. The unit area for touch recognition is larger than the area of ​​the pixel unit. The unit area for touch recognition includes multiple pixel units. Depending on the touch recognition requirements, the unit area for touch recognition can be fixed or variable. For example, if the unit area for touch recognition is fixed: based on the number of pixel rows and columns included in the display module, every k×l pixel units form a touch recognition unit, each touch recognition unit forms a pixel group, and each pixel group corresponds to a microlens group. The location information of the pixel group corresponding to the unique identifier is formed through the encoding information of the microlens group. Alternatively, if the unit area for touch recognition is variable: based on the touch requirements of the display module for different positions, for example, different unit areas are formed for the edge and middle positions of the display module, thereby forming different pixel groups. For example, the unit area at the edge position is smaller than the unit area at the middle position to more accurately represent the location information of each pixel group located at the edge position. Each pixel group corresponds to a microlens group, and the location information of the pixel group corresponding to the unique identifier is formed through the encoding information of the microlens group.

[0060] Meanwhile, this application does not limit the number of microlenses included in the microlens group, nor does it limit the type of microlenses or the specific arrangement of each microlens. The number of microlenses included in the microlens group is related to the accuracy of touch operation, and the type of microlenses is related to the accuracy of imaging recognition. Those skilled in the art should select an appropriate number and type of microlenses according to the actual application requirements, with the design principle of achieving specular reflection of incident infrared light, which will not be elaborated here.

[0061] Specifically, such as Figure 9 The diagram illustrates the optical path of an infrared stylus, where infrared light emitted from its light source is incident on the display device, specularly reflected light is formed on different reflective surfaces of the diamond-shaped microlenses in the microlens layer, and the reflected light enters the receiving unit. In this embodiment, multiple diamond-shaped microlenses are used to perform specular reflection of the incident infrared light and concentrate the direction of the reflected light to form reflected light that is approximately perpendicular to the receiving unit of the infrared stylus. This improves the reflectivity of the display device and the light energy of the reflected light, effectively enhancing the recognition accuracy and stability of the infrared stylus.

[0062] like Figure 8c The diagram shows the imaging of four types of diamond-shaped microlenses. The image sensor of the infrared stylus receiving unit identifies the encoding information of different diamond-shaped microlenses based on the different imaging diagrams. Through the diamond-shaped microlenses included in each microlens group, the position information of each touch operation of the infrared stylus on the display device is identified.

[0063] In an optional embodiment, the spacing between adjacent pixel units is less than or equal to 80 μm, and the diameter of the diamond-shaped microlens is smaller than the spacing; a gap is formed between multiple adjacent pixel units, and the orthogonal projection of the diamond-shaped microlens on the substrate falls into the orthogonal projection of the gap on the substrate.

[0064] In this embodiment, considering the normal display function of the display module, such as Figure 1 and Figure 10 As shown, microlenses are placed in the gaps between adjacent pixel units, such as... Figure 10 The image shown is a top view of the display device. Figure 10 The image shows multiple pixel units 114 and a microlens group, which includes nine diamond-shaped microlenses 131. Each diamond-shaped microlens 131 is located in the gap between adjacent pixel units 114. Each pixel unit 114 includes a red sub-pixel 111, a green sub-pixel 112, and a blue sub-pixel 113. Each sub-pixel has an opening area, the area of ​​which is smaller than the area of ​​the sub-pixel. The diamond-shaped microlenses 131 are disposed in the gap between the pixel units, and the diameter of the diamond-shaped microlenses 131 is smaller than the distance between adjacent pixel units. Therefore, the orthographic projection of the microlens on the substrate does not overlap with the orthographic projection of each sub-pixel on the substrate. The microlenses do not affect the light emitted from the opening area of ​​each sub-pixel, that is, they do not affect the amount of light emitted from the opening area of ​​each sub-pixel, thereby ensuring the normal display of the display device.

[0065] Specifically, in such Figure 10In the pixel arrangement of the pixel unit shown, the gap between the red sub-pixels of adjacent pixel units is the largest; that is, the maximum gap between adjacent pixel units is the gap between the red sub-pixels. Therefore, the microlens is placed in this gap. It should be noted that this application does not specifically limit the arrangement of each sub-pixel of the pixel unit. Those skilled in the art should select a larger gap between adjacent pixel units to place the microlens according to actual application requirements to ensure the normal display of the display device.

[0066] In a specific example, the spacing between adjacent pixel units 114 is 76.5 μm, so the diameter of the diamond-shaped microlens 131 is smaller than the spacing. The closer the radius of the diamond-shaped microlens is to half of the spacing, the more light it can collect and reflect, the more concentrated the reflected light can be, and the higher the light energy of the reflected light received by the receiving unit.

[0067] Furthermore, in an optional embodiment, the mirror slope of the diamond-shaped microlens is greater than or equal to 40° and less than or equal to 50°, the cross-section of the diamond-shaped microlens parallel to the substrate is octagonal, and the height of the diamond-shaped microlens is greater than or equal to 5μm and less than or equal to 10μm.

[0068] In this embodiment, the diamond-shaped microlens has an octagonal cross-section, forming symmetrically and uniformly arranged mirror surfaces to facilitate the reflection of incident light from different directions under the same conditions. Simultaneously, by limiting the mirror slope of the diamond-shaped microlens, the angle of reflected light and the light energy of different incident light can be controlled. For example, when the mirror slope is greater than or equal to 40° and less than or equal to 50°, the reflection direction of the reflected light is closer to the incident direction, making it easier for the infrared stylus's receiving unit to receive the reflected light and form a stronger reflected beam. Furthermore, by limiting the height of the diamond-shaped microlens, the propagation path and reflection intensity of the incident light within the microlens are limited, further improving the reflectivity of the display device and facilitating the infrared stylus's reception and recognition of the reflected light.

[0069] It is worth noting that the height of the diamond-shaped microlenses is also limited by the structure of the display module. Those skilled in the art should set the height of the microlens layer according to the actual application requirements and select the height of each diamond-shaped microlens according to the height of the microlens layer. This will not be elaborated further here.

[0070] To ensure accurate identification of each microlens group, in an optional embodiment, the pixel group comprises m×n pixel units, where m>4 and n>4; the microlens group comprises (m-2)×(n-2) microlenses.

[0071] In this embodiment, multiple microlenses in a microlens group form the position information of corresponding pixel groups. To facilitate the identification of each position information, a blank ring is formed around each microlens group for identification. In a specific example, such as... Figure 11 The diagram shown is a top view of each microlens group. Each microlens group includes nine diamond-shaped microlenses 131 in a 3×3 pattern. A blank area 133 is formed around each diamond-shaped microlens for identification. In the pixel group corresponding to the microlens group, each pixel group includes 25 pixel units in a 5×5 pattern.

[0072] To further improve the reflectivity of the display device, in an optional embodiment, such as Figure 1 As shown, the microlens layer 13 further includes a filling layer 132 covering the plurality of microlenses 131, the refractive index of the filling layer 132 being less than the refractive index of the microlenses.

[0073] In this embodiment, the microlens layer includes a plurality of microlenses with a high refractive index and a low-refractive-index filling layer covering them. The filling layer serves two purposes: firstly, it protects the microlenses by covering them; secondly, the filling layer with a lower refractive index further increases the light energy of the reflected light, thereby improving the reflection efficiency of the display device. Specifically, the refractive index of the microlenses is greater than or equal to 1.75 and less than or equal to 1.85, and the refractive index of the filling layer is greater than or equal to 1.45 and less than or equal to 1.5.

[0074] Considering different display modules, in one optional embodiment, the display module includes a light-emitting device layer, a microlens layer, a polarizer, and a cover plate stacked on the substrate.

[0075] In this embodiment, as Figure 12 As shown, the display module includes a buffer layer 15, a driving circuit layer 16, a light-emitting device layer 11, an encapsulation layer 12, a microlens layer 13, a polarizer 17, and a cover plate 14, all stacked on a substrate 10. The light-emitting device layer includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. Considering the relatively thick polarizer 17, to prevent the microlens layer 13 from being too far from the light-emitting device layer 11 and thus affecting the emitted light from the opening areas of each sub-pixel, the microlens layer 13 is disposed on the encapsulation layer. While ensuring normal display of the display module, by placing a microlens layer on the light-emitting side of the light-emitting device layer, multiple microlenses with different encoding information are used to reflect the incident light of a preset wavelength, thereby improving the reflectivity of the display module.

[0076] In another alternative embodiment, the display module includes a light-emitting device layer, a color filter layer, a microlens layer, and a cover plate stacked on the substrate.

[0077] In this embodiment, as Figure 13As shown, the display module includes a buffer layer 15, a driving circuit layer 16, a light-emitting device layer 11, an encapsulation layer 12, a color filter layer 18, a microlens layer 13, and a cover plate 14, all stacked on a substrate 10. The light-emitting device layer includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. The color filter layer 18 includes a black matrix 181, a color filter 182, and a dielectric layer 183 covering the black matrix and the color filter. Considering the thinness of the color filter layer 18, the microlens layer 13 is disposed on top of the color filter layer. While ensuring normal display of the display module, by placing a microlens layer on the light-emitting side of the light-emitting device layer, multiple microlenses with different encoding information are used to reflect incident light of a preset wavelength, thereby improving the reflectivity of the display module.

[0078] Third, the receiving unit of the stylus receives the reflected light and identifies the encoded information of the reflected light.

[0079] In this embodiment, the infrared stylus receives reflected light through the optical lens of the receiving unit, and the image sensor identifies the light signal received by the optical lens to obtain encoded information.

[0080] Fourth, the processor of the stylus obtains the position information corresponding to the touch operation according to the encoding information and the preset mapping table, and transmits the position information to the display device through the second communication device.

[0081] In this embodiment, the processor of the infrared stylus, based on the encoded information identified by the receiving unit, refers to a pre-set mapping table. For example, the mapping table includes location information corresponding to various encoded information; specifically, it includes the encoded information of each diamond-shaped microlens in each microlens group, forming the encoded information of that microlens group, and the specific location information of the corresponding display module. For example... Figure 10 The microlens group's encoding information is "001000011110001001". Its corresponding position information can represent a specific position of the display module, or it can represent x and y coordinates. This application does not impose specific limitations on this; those skilled in the art should select an appropriate mapping table based on actual application requirements, with the representation of the display module's specific position information as the design criterion. Further details are omitted here. Simultaneously, the processor, based on the acquired position information of the display module, transmits the position information to the display device using a second communication device, such as a wireless communication device.

[0082] Fifth, the controller of the display device executes the user operation based on the location information received by the first communication device.

[0083] In this embodiment, the display device receives the location information sent by the infrared stylus and determines the touch operation based on the location information, such as clicking a button on the display content of the display device, and executes the touch operation, thereby realizing the touch function between the display device and the infrared stylus.

[0084] At this point, the display device and the infrared stylus complete the touch operation. In this embodiment, a microlens layer is set on the light-emitting side of the light-emitting device layer of the display device. The slope of multiple microlenses with different encoding information is used to reflect the incident preset wavelength light, which effectively improves the reflection performance of the display module and further improves the recognition accuracy of the infrared stylus on the reflected light. This realizes the interactive system formed by the display device and the infrared stylus, and the touch function based on optical communication, which effectively reduces the power consumption of the display device and increases the battery life.

[0085] The display module based on the above embodiments, such as Figure 3 As shown, one embodiment of the present invention provides a display device, including a display module, a first communication device, and a controller, wherein...

[0086] The controller is configured to perform touch operations on the stylus based on position information received by the first communication device from the stylus used in conjunction with the display device, wherein the position information is generated by the display module in response to the touch operations on the stylus.

[0087] The display device of this embodiment improves the reflectivity of the display device by setting a microlens layer on the light-emitting side of the light-emitting device layer. This is achieved by using the slope of multiple microlenses, each representing different encoded information, to reflect incident light of a preset wavelength. This allows a stylus used with the display device to perform position recognition based on the reflected light, enabling touch operation based on optical communication. This effectively reduces the power consumption of touch modules used in related technologies and improves touch accuracy. Thus, while the display device is functioning normally, it can be used with a stylus that emits light of a preset wavelength to achieve touch operation based on optical communication, effectively reducing the power consumption of the display device and increasing battery life. Specific implementation details of this embodiment are found in the foregoing embodiments and will not be repeated here.

[0088] like Figure 4 As shown, this embodiment also provides a stylus for use with the display device of the above embodiments, including a light source, a receiving unit, a processor, and a second communication device, wherein...

[0089] The light source is used to emit light of a preset wavelength;

[0090] The receiving unit includes an optical lens and an image sensor. The optical lens is used to receive reflected light generated by the microlens layer of the display device in response to the touch operation of the stylus. The image sensor is used to identify the encoded information of the reflected light. The microlens layer includes a plurality of microlenses, and each microlens includes at least one sloped surface at a preset angle to the substrate of the display device.

[0091] The processor is configured to obtain the position information corresponding to the touch operation based on the encoding information and a preset mapping table, and transmit the position information to the display device through the second communication device.

[0092] In this embodiment, the stylus, in response to user operation of the touch display device, emits light of a preset wavelength through a light source. The light reflected from the slopes of the microlenses in the microlens layer of the display device is received by the optical lens of the receiving unit. The image sensor of the receiving unit identifies the reflected light to obtain its contained encoding information, which is then sent to the display device via a second communication device. This allows the display device to obtain the position information corresponding to the stylus's touch operation on the display device based on the encoding information, and to determine and execute the touch operation based on the position information. This achieves touch operation based on optical communication, effectively improving the accuracy and stability of the touch function while maintaining normal display functionality. Specific implementation details of this embodiment are found in the foregoing embodiments and will not be repeated here.

[0093] The display device and stylus based on the above embodiments, such as Figure 2 As shown, one embodiment of the present invention provides an interactive system, including a display device and a stylus.

[0094] In this embodiment, the display device is as follows: Figure 3 As shown, it includes a display module, a first communication device, and a controller. The controller is used to execute touch operations of the stylus based on position information received by the first communication device from a stylus used in conjunction with the display device. The position information is formed by the display module in response to the touch operations of the stylus. The stylus is as follows: Figure 4As shown, an infrared stylus includes a light source for emitting infrared light, a receiving unit for receiving reflected light generated by a display device in response to a touch operation of the stylus, and identifying coded information based on the reflected light, a processor for obtaining the position information of the touch operation based on the coded information and a preset mapping table, and a second communication device for transmitting the position information to the display device. The interactive system responds to user operation of the touch display device via the stylus by emitting light of a preset wavelength through the light source. Simultaneously, a microlens layer on the light-emitting side of the display device's light-emitting device layer reflects the incident preset wavelength light using the slope of multiple microlenses representing different coded information, effectively improving the display device's reflection performance. The receiving unit of the stylus receives the light reflected by each microlens in the display device's microlens layer, identifies the reflected light to obtain its contained coded information, and sends it to the display device. Finally, the display device obtains the position information corresponding to the stylus's touch operation on the display device based on the coded information, determines the touch operation based on the position information, and executes the touch operation, thereby realizing touch operation based on optical communication. This effectively improves the accuracy and stability of the touch function while maintaining normal display functionality. The specific implementation method of this embodiment is the same as that in the foregoing embodiments, and will not be repeated here.

[0095] This invention addresses existing problems by providing a display module, display device, stylus, and interactive system. The display module incorporates a microlens layer on the light-emitting side of the light-emitting device layer. By utilizing the slope of multiple microlenses with different encoded information to reflect incident light of a preset wavelength, the reflectivity of the display module is improved. This allows the stylus used with the display module to perform position recognition based on the reflected light, enabling touch operation based on optical communication. This effectively reduces the power consumption of touch modules used in related technologies, thus overcoming the problems existing in the prior art and possessing practical application value.

[0096] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A display module, characterized by It includes a light-emitting device layer and a microlens layer sequentially stacked on a substrate, wherein The light-emitting device layer includes multiple pixel units arranged in an array. The multiple pixel units form multiple pixel groups according to a preset touch recognition unit. Each pixel unit includes multiple sub-pixels, and each sub-pixel includes an opening area. The microlens layer includes an array of microlenses used to characterize different encoded information. The microlenses form a microlens group corresponding to each pixel group and used to identify the position information of the corresponding pixel group. The orthographic projection of the microlens on the substrate does not overlap with the orthographic projection of the opening area of ​​the sub-pixel on the substrate. The microlens includes at least one sloped surface at a preset angle to the substrate.

2. The display module of claim 1, wherein, The microlens is a diamond-shaped microlens, and the diamond-shaped microlens characterizes the encoded information based on at least one of the microlens' height, radius, and mirror slope.

3. The display module of claim 2, wherein, The diamond-shaped microlens has a mirror slope greater than or equal to 40° and less than or equal to 50°, an octagonal cross-section parallel to the substrate, and a height greater than or equal to 5 μm and less than or equal to 10 μm.

4. The display module of claim 2, wherein, The spacing between adjacent pixel units is less than or equal to 80 μm, and the diameter of the diamond-shaped microlens is smaller than the spacing. A gap is formed between multiple adjacent pixel units, and the orthogonal projection of the diamond-shaped microlens on the substrate falls into the orthogonal projection of the gap on the substrate.

5. The display module of claim 1, wherein, The pixel group comprises m×n pixel units, where m>4 and n>4; The microlens group comprises (m-2) × (n-2) microlenses.

6. The display module according to any one of claims 1-5, characterized in that, The microlens layer further includes a filling layer covering the plurality of microlenses, wherein the refractive index of the filling layer is less than that of the microlenses.

7. The display module according to claim 1, characterized in that, The display module includes a light-emitting device layer, a microlens layer, a polarizer, and a cover plate stacked on the substrate; or The display module includes a light-emitting device layer, a color filter layer, a microlens layer, and a cover plate stacked on the substrate.

8. A display device, characterized by comprising: Includes the display module, the first communication device, and the controller as described in any one of claims 1-7, wherein, The controller is configured to perform touch operations on the stylus based on position information received by the first communication device from the stylus used in conjunction with the display device, wherein the position information is generated by the display module in response to the touch operations on the stylus.

9. A stylus for use with the display device of claim 8, wherein It includes a light source, a receiving unit, a processor, and a second communication device, wherein The light source is used to emit light of a preset wavelength; The receiving unit includes an optical lens and an image sensor. The optical lens is used to receive reflected light generated by the microlens layer of the display device in response to the touch operation of the stylus. The image sensor is used to identify the encoded information of the reflected light. The microlens layer includes a plurality of microlenses, and each microlens includes at least one sloped surface at a preset angle to the substrate of the display device. The processor is configured to obtain the position information corresponding to the touch operation based on the encoding information and a preset mapping table, and transmit the position information to the display device through the second communication device.

10. The stylus according to claim 9, characterized in that, The light emission angle of the light source is greater than or equal to 20° and less than or equal to 30°, the diameter of the light source is less than or equal to 1mm, and the wavelength of the light with the preset wavelength is 850nm. and / or The optical lens has a focal length of less than or equal to 3mm, an object-side field of view of less than or equal to 15°, an operating wavelength of 850nm, and a spot radius of less than or equal to 0.8μm.

11. An interactive system, characterized by Includes the display device as described in claim 8, and the stylus as described in claim 9 or 10.

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