Display module and wearable device

Abstract

Provided in the present application are a display module and a wearable device. The display module comprises a solar device, a display screen and a cover plate, wherein the solar device, the display screen and the cover plate are sequentially stacked; the display screen comprises a first area, which is an effective display area of the display screen; the projection of the first area in a first direction is located within an area where the solar device is located, the first direction being the stacking direction of the display module; the display screen is a display screen with a self-illuminating function, and is of a light-transmitting structure; and at least some of the light emitted by the display screen is irradiated on the solar device. The display module and wearable device provided in the present application can improve the endurance capability of the wearable device.

Description

Display module and wearable device

[0001] The present application claims priority to the Chinese patent application No. 202410994666.7, filed on July 23, 2024, and entitled "Display module and wearable device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of display, in particular, to a display module and a wearable device. BACKGROUND

[0003] In the scenario of long-time and long-distance outdoor activities, the endurance requirement of wearable terminal devices is high. In view of product aesthetics and wearing comfort, the battery size is usually not increased to improve the endurance. The most easily obtained is solar energy. The solar energy device is arranged in the wearable device to convert the collected solar energy into electric energy for use by the mainboard, display screen and other electronic devices, which can effectively improve the endurance.

[0004] At present, in the wearable device with solar energy conversion function, one method is to arrange the solar energy device in the display screen frame area. This method has limited light sensing area of the solar energy device and is prone to increase the screen black border. Another method is to arrange the solar energy device in the pixel gap of the effective display area of the display screen. This method still has limited light sensing area, and the solar energy device is coupled with the display function, so that the available light sensing area of the effective display area is very small. In the two schemes, the limited light sensing area of the solar energy device makes it difficult to improve the endurance of the wearable device. SUMMARY

[0005] The present application provides a display module and a wearable device, which can improve the endurance of the wearable device.

[0006] In a first aspect, a display module is provided, which is applied to a wearable device and includes a solar energy device, a display screen and a cover plate. The solar energy device, the display screen and the cover plate are sequentially stacked. The display screen includes a first area, which is an effective display area of the display screen. The projection of the first area along a first direction is located in the area where the solar energy device is located. The first direction is the stacking direction of the display module. The display screen is a self-luminous display screen and has a light-transmitting structure. At least part of the light emitted by the display screen irradiates on the solar energy device.

[0007] In the embodiments provided in the present application, the solar device is arranged below the display screen, and the projection of the first area of the display screen in the first direction is located in the area where the solar device is located. The effective light-sensing area of the solar device can be expanded to the range corresponding to the entire first area, the absorption amount of the solar device to solar energy can be increased, so that the solar device can generate more electric energy, thereby improving the endurance of the wearable device. Moreover, the display screen is a light-transmitting structure, and at least part of the light emitted by the display screen can irradiate on the solar device, so that the solar device can not only use solar energy to generate electric energy, but also use the light emission of the display screen to generate electric energy, so that the solar device can have more opportunities to generate electric energy, further improving the endurance of the wearable device. In addition, the solar device is arranged below the display screen, and the solar device can be used as a light-shielding structure of the display module to replace the traditional light-shielding foam, so that the display module and the wearable device can have a light and thin structure.

[0008] With reference to the first aspect, in some implementations of the first aspect, the cover plate is a convex lens structure.

[0009] In the embodiments provided in the present application, the cover plate is a convex lens structure, which can converge sunlight, so that more light is gathered on the surface of the solar device, thereby enabling the solar device to generate more electric energy.

[0010] With reference to the first aspect, in some implementations of the first aspect, the display screen is provided with a light-converging structure, the light-converging structure is located in the first area, and the projection of the light-converging structure in the first direction is located in the pixel gap of the display screen.

[0011] With reference to the first aspect, in some implementations of the first aspect, the display screen includes a light-emitting layer, and the light-converging structure is arranged on the side of the light-emitting layer close to the cover plate.

[0012] In the embodiments provided in the present application, the display screen is provided with a light-converging structure, which can converge sunlight, so that more light is gathered on the surface of the solar device, thereby enabling the solar device to generate more electric energy.

[0013] With reference to the first aspect, in some implementations of the first aspect, the display module further includes a first circuit board, the first circuit board is arranged on the side of the solar device away from the display screen, the display screen is electrically connected with the first circuit board, and the first circuit board includes an electrical connection interface, which is used for electrically connecting the display screen with the mainboard of the wearable device.

[0014] In the embodiments provided in the present application, the display module comprises a first circuit board, the first circuit board is arranged on the side of the solar device away from the display screen, and the arrangement of the first circuit board can prevent the effective light-sensing area of the solar device from being affected.

[0015] With reference to the first aspect, in some implementations of the first aspect, the solar device is electrically connected with the first circuit board, and the solar device is electrically connected with the main board of the wearable device through the electrical connection interface.

[0016] In the embodiments provided in the present application, the solar device and the display screen are electrically connected on the same circuit board, and are electrically connected with the main board of the wearable device through the same electrical connection interface on the circuit board, which can save the electrical connection interface on the main board, save the board space of the main board, and reduce the size of the wearable device.

[0017] With reference to the first aspect, in some implementations of the first aspect, the display module further comprises a support, the support is arranged on the side of the solar device away from the display screen, and the material of the support is polyimide.

[0018] With reference to the first aspect, in some implementations of the first aspect, the size of the support along the first direction is less than or equal to 100 microns.

[0019] In the embodiments provided in the present application, the support is arranged on the side of the solar device away from the display screen, which can provide support for the solar device, and the material of the support is polyimide, which can make the display module have a thin thickness.

[0020] With reference to the first aspect, in some implementations of the first aspect, the material of the solar device is one or a combination of the following: gallium arsenide, perovskite, or silicon-based material.

[0021] In the embodiments provided in the present application, the material of the solar device is one or a combination of the following: gallium arsenide, perovskite, or silicon-based material, which can make the solar device have good photoelectric conversion efficiency.

[0022] With reference to the first aspect, in some implementations of the first aspect, the transmittance of the solar device to visible light is less than or equal to a preset threshold.

[0023] In the embodiments provided in the present application, the transmittance of the solar device to visible light is less than or equal to a preset threshold, so that the solar device can serve as a light-shielding structure of the display screen.

[0024] With reference to the first aspect, in some implementations of the first aspect, the display screen is an organic light-emitting diode display screen or a micro light-emitting diode display screen.

[0025] In some embodiments of the first aspect, when the display screen is a micro light-emitting diode display screen, the display screen comprises a first chip, the first chip being configured to emit light, and a size of the first chip along a second direction is less than 5 microns, the second direction being perpendicular to the first direction.

[0026] In the embodiments provided in the present application, the micro light-emitting diode display screen comprises a first chip, and a size of the first chip along a second direction is less than 5 microns, so that the light transmittance of the display screen can be improved, and the photoelectric conversion efficiency of the solar energy device can be improved.

[0027] In a second aspect, a wearable device is provided, which comprises the display module as described in the first aspect or any possible implementation manner of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0028] FIG. 1 is a structural schematic diagram of a wearable device according to an embodiment of the present application;

[0029] FIG. 2 is a sectional structural schematic diagram of a display module according to the prior art;

[0030] FIG. 3 is a sectional structural schematic diagram of a display module according to an embodiment of the present application;

[0031] FIGS. 4 and 5 are sectional structural schematic diagrams of a display screen according to an embodiment of the present application;

[0032] FIG. 6 is a schematic diagram of a curve of wavelength and transmittance of a solar energy material according to an embodiment of the present application;

[0033] FIGS. 7 and 8 are sectional structural schematic diagrams of a display module according to an embodiment of the present application;

[0034] FIGS. 9 and 10 are bottom structural schematic diagrams of a display module according to an embodiment of the present application. DETAILED DESCRIPTION

[0035] The technical solutions in the present application will be described below with reference to the drawings.

[0036] In the present specification, the expressions “one embodiment” or “some embodiments” etc. mean that a particular feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Therefore, the expressions “in one embodiment”, “in some embodiments”, “in other some embodiments”, “in further some embodiments” etc. appearing in different places in the present specification do not necessarily refer to the same embodiment, but mean “one or more but not all embodiments”, unless otherwise specifically emphasized.

[0037] In various embodiments of the present application, the first, second, etc. are only used to represent that the multiple objects are different. For example, the first circuit board and the second circuit board are only used to represent different circuit boards. And should not have any impact on the nature and quantity of the circuit board, the above-mentioned first, second, etc. should not cause any limitation to the embodiments of the present application.

[0038] The terms "comprise", "contain", "have" and their conjugates mean "including but not limited to", unless otherwise specifically emphasized.

[0039] In order to facilitate the understanding of the present application, first, the professional terms involved in the present application are introduced.

[0040] (1) Active area (AA): The AA area can also be referred to as a visual area or a display area, etc. The AA area refers to the actual area on the screen for displaying image, text, etc. This part of the area is directly visible to the user and is the core area for interaction or presentation of information. From the internal structure, the AA area contains a plurality of periodically arranged pixels, a plurality of data lines and a plurality of gate scanning lines. The pixel can be represented as a pixel circuit, and a single data line and a single gate scanning line are connected to one or more rows of pixels, respectively, for controlling the light emission of the pixels.

[0041] (2) Non-active area (NA): The NA area refers to the area on the display screen that is not used to display image content. The NA is usually located at the periphery of the AA area. The NA area contains a plurality of scanning line driving circuits, which can also be referred to as gate driver on array (GOA) circuits. The GOA circuit is used to output a GOA signal to control the light emission of the pixels. The NA area can also include a frame and sensors, camera openings, etc. that exist below or on the side of the screen. Although the NA area does not directly participate in content display, it is necessary for the structural integrity, installation and fixation of the screen, and in some cases, it contains auxiliary functions.

[0042] (3) Solar energy device: The working principle of the solar energy device is mainly based on the photoelectric effect, especially the photovoltaic effect. By capturing the energy of solar photons, the physical properties of semiconductors are used to promote electron transitions and generate electric current to achieve direct conversion of solar energy to electrical energy.

[0043] FIG. 1 is a structural schematic diagram of a wearable device used in an embodiment of the present application, which can be a watch or a bracelet product, etc. The wearable device can include a main body part and a watchband part 120, the main body part and the watchband part 120 are connected to each other, the main body part can include a shell 130 and a display screen 110, and the display screen 110 can be fixedly connected with the shell 130. The shell 130 can include a bottom wall and a side wall (not shown in FIG. 1), the bottom wall can be a part of the shell 130 parallel to the display screen 110, and the side wall can be a part of the shell 130 perpendicular to the display screen 110. The display screen 110 can be fixedly connected with the side wall. A containing space can be formed between the display screen 110 and the shell 130, which is used to accommodate electronic devices of the wearable device, such as a mainboard, a sound cavity, a universal serial bus (USB), etc.

[0044] FIG. 2 is a cross-sectional structural schematic diagram of a display module, which can be arranged in the wearable device shown in FIG. 1. The display module can be used to convert solar energy into electrical energy to power the wearable device, thereby prolonging the endurance of the wearable device. FIG. 2 can be a structural schematic diagram after cutting along the A-A section shown in FIG. 1. First, as shown in (a) of FIG. 2, the display screen 110, the solar device 103 and the cover plate 101 are sequentially stacked, that is, the solar device 103 is arranged above the display screen 110 between the cover plate 101 and the display screen 110, and the solar device 103 is arranged at the edge position of the wearable device. When the main body part of the wearable device is a circular structure as shown in FIG. 1, the solar device 103 can also be arranged in a circular structure at the edge of the main body part. The solar device 103 is fixedly bonded with the cover plate 101 by an adhesive 102, which can be an optically clear adhesive (OCA) to prevent affecting the display function of the display screen 110. The display module further includes a support 104 arranged between the solar device 103 and the display screen 110 for supporting the solar device 103. The support 104 can be glass material, and using transparent glass as the support can avoid affecting the display function of the display screen 110. The support 104 and the display screen 110 can also be fixedly bonded by an adhesive 105, which can also be OCA.

[0045] In this example, the solar device is arranged at the edge of the screen, and the available area of the solar device is limited, which has little effect on the endurance of the wearable device. In addition, arranging the solar device at the edge position can easily increase the screen black border, affecting the user experience.

[0046] Fig. 2 (b) is a structural schematic diagram of another display module, which is different from Fig. 2 (a) in that the edge position of the display area and the AA area are provided with the solar energy device 103, wherein the solar energy device provided in the AA area is laid in the pixel gap, avoiding affecting the display function of the display screen.

[0047] In this example, since the solar energy device is laid in the pixel gap, the available area is still limited, and the improvement of the endurance of the wearable device is limited.

[0048] Therefore, the embodiment of the present application provides a display module, which can improve the utilization rate of solar energy and improve the endurance of the wearable device.

[0049] Fig. 3 is a cross-sectional structural schematic diagram of a display module provided by the embodiment of the present application, which can be a cross-sectional structural schematic diagram of the wearable device in Fig. 1 along the A-A direction. As shown in Fig. 3, the display module includes a cover plate 210, a solar energy device 230 and a display screen 220, and the solar energy device 230, the display screen 220 and the cover plate 210 can be sequentially stacked, that is, the solar energy device 230 can be arranged below the display screen 220, and the display screen 220 is located between the cover plate 210 and the solar energy device 230.

[0050] The cover plate 210 can be glass, resin or ceramic material, which is used to protect the internal devices of the wearable device, and has visibility to prevent affecting the display effect of the display screen 220. The cover plate 210 and the display screen 220 can be fixed by adhesive 240, which can be OCA. The size of the cover plate 210 along the x-axis direction is greater than the size of the solar energy device 230 and the display screen 220 along the x-axis direction, and the part of the cover plate 210 which is not covered on the display screen 220 can be used to be fixedly connected with the part of the shell 130 of the wearable device shown in Fig. 1, for example, by adhesion or the like, and the part can also be used to cover the electric connection line of the display screen 220 and / or the solar energy device 230, the sensor arranged in the wearable device, etc., so as to avoid the internal devices being observed from the outside by the user, affecting the appearance beauty of the wearable device, for example, the edge position of the side of the cover plate 210 close to the display screen 220 can be coated with ink to shield the internal devices.

[0051] The display screen 220 can be a display screen 220 with a self-luminous function, and the display screen 220 can be a light-transmitting structure. The display screen 220 with a self-luminous function can mean that the display screen 220 has a self-luminous structure, does not need a backlight source, or in other words, does not need an additional light source structure. In some embodiments, the display screen 220 can be an organic light emitting diode (OLED) display screen or a micro light emitting diode (micro-LED) display screen. Among them, each pixel in the OLED display screen can emit light by itself, and the OLED display screen can include an active matrix organic light emitting diode (AMOLED) display screen or a passive matrix organic light emitting diode (PMOLED) display screen. The AMOLED display screen actively controls the on-off state of each pixel by using a thin film transistor array, and the PMOLED controls the pixels by a matrix circuit. The pixels of the micro-LED are composed of tiny inorganic LED, but have similar self-luminous characteristics as the OLED.

[0052] It should be noted that the display screen 220 can also be other display screens with a self-luminous structure, for example, the display screen 220 can also be a quantum dot LED (Q-LED) display screen, which combines the self-luminous characteristics of the OLED and quantum dot technology, and emits light directly through a quantum dot layer; for another example, the display screen 220 can also be a mini-LED, which uses a large number of small LED beads as a backlight source, and the densely arranged small LED beads have a strong local dimming function and can also be regarded as a self-luminous structure.

[0053] The display screen 220 being a light-transmitting structure can mean that the display screen 220 has a visible light transmittance greater than or equal to a preset threshold, for example, the transmittance is greater than or equal to 30%, and the display screen 220 can be regarded as a light-transmitting structure. The display screen 220 can include a plurality of structure layers, at least part of the structures in the plurality of structure layers are light-transmitting structures, so that the display screen 220 has a visible light transmittance greater than or equal to a preset threshold.

[0054] As an example, the display screen 220 can be an OLED display screen, and FIG. 4 is a structure of the OLED display screen. As shown in FIG. 4, the display screen 220 can include a substrate layer 223, which can be a basic support layer in the display screen 220. In order to improve the light transmission effect of the display screen, the substrate layer 223 can be made of transparent materials such as glass or plastic, for example, polyimide (PI).

[0055] The OLED display screen can also include a driving circuit 224, which can be a thin film transistor (TFT) circuit. The driving circuit 224 can be used to adjust the current size through the pixels to adjust the luminance of the display screen. The TFT circuit can include metal parts and non-metal parts. In order to improve the light transmission effect of the display screen, the non-metal parts can be made of transparent materials.

[0056] The OLED display screen can also include an anode layer 225, which can be used to inject holes into a light-emitting layer 226. The anode layer 225 can be a conductive layer. In order to improve the light transmission effect of the display screen, the material of the anode layer 225 can be indium tin oxide (ITO).

[0057] The OLED display screen can also include the light-emitting layer 226, which can be made of light-emitting materials. The holes injected by the anode layer 225 and the electrons injected by a cathode layer 227 can recombine in the light-emitting layer 226, and the energy is released in the form of light energy to make the display screen 220 display images. The light-emitting material of the light-emitting layer 226 can be a transparent material or a slightly colored material to improve the light transmission effect of the display screen 220.

[0058] The OLED display screen can also include the cathode layer 227, which is used to inject electrons into the light-emitting layer 226. The cathode layer 227 can be an opaque structure, and the material of the cathode layer 227 can be, for example, a magnesium-silver alloy (Mg / Ag). In order to improve the light transmission effect of the display screen, the part of the cathode layer 227 above the non-pixel structure can be removed, for example, by etching, laser removal, etc. The cathode layer 227 can be formed by evaporation.

[0059] The OLED display screen can also include a touch layer 228, which is used to detect touch signals. The touch layer 228 has metal traces, for example, including touch electrodes and connection lines between the touch electrodes and touch chips. In order to improve the light transmission effect of the display screen, the metal lines of the touch layer 228 can be transparent metal lines, for example, made of ITO material.

[0060] The OLED display screen can further include an encapsulation layer 229. The base material of the encapsulation layer 229 can be a non-metal material, and the encapsulation layer 229 can be a transparent structure to improve the light transmission effect of the display screen. The encapsulation layer 229 can be used to protect the organic material in the display screen 220 from moisture and oxygen corrosion to prolong the service life of the display screen 220.

[0061] In the OLED display screen described in FIG. 4, the material of each structure layer can be preferably a transparent material, and when the use of transparent material cannot meet the corresponding performance requirements, non-transparent material can also be used. When the material of each structure layer includes non-transparent material, at least part of the projection of the non-transparent material of each structure layer in the first direction can overlap each other. For example, when the metal part of the opaque structure is included in the touch layer and the cathode layer, the metal part of the opaque structure in the touch layer can overlap the metal part of the opaque structure in the cathode layer as much as possible to increase the light transmission area of the display screen and improve the light transmission rate of the display screen.

[0062] As another example, the display screen 220 can be a micro-LED display screen, and the cross-sectional structure of the micro-LED display screen can be as shown in FIG. 5.

[0063] The micro-LED display screen can also include a substrate layer 223, which can be similar to the substrate layer of the OLED display screen described above, and will not be described here.

[0064] The micro-LED display screen can also include a driving circuit 224, which can be used to control the brightness and color of the micro-LED chip. To improve the light transmission effect of the display screen, the driving circuit layer can use transparent conductor or transparent transistor technology, for example, oxide semiconductor material such as indium tin oxide can be used.

[0065] The micro-LED display screen can further include a light-emitting layer 226, which can include micro-LED chips, which can be referred to as first chips, and the number of the first chips can be multiple, forming a chip array. The first chips can be electrically connected to the driving circuit, so that each first chip can receive the correct electrical signal. The first chips can be used to realize the light emission of the display screen, and the size of the first chips along the second direction can be less than or equal to 5 microns, and the second direction can be a direction parallel to the xy plane shown in the figure. The first chips can also be referred to as micro-LED chips, and in the micro-LED display screen, each first chip corresponds to a pixel point, and each first chip can independently control the light emission brightness, color, response speed, etc. of the corresponding pixel point. The first chips can be designed in various shapes and sizes, for example, the first chips can be circular structures, and the size of the first chips along the second direction can be less than or equal to 5 microns, which can mean that the diameter of the first chips is less than or equal to 5 microns; for another example, the first chips can also be rectangular structures, and the size of the first chips along the second direction can be less than or equal to 5 microns, which can mean that the length and width of the first chips are both less than or equal to 5 microns. The first chips are usually opaque structures, and the size of the first chips along the second direction can be less than or equal to 5 microns, which can increase the light transmittance of the display screen.

[0066] Similar to the structure of the OLED display screen, the micro-LED display screen can also include a touch layer 228 and an encapsulation layer 229, which will not be described here.

[0067] It should be noted that FIGS. 4 and 5 only serve as examples to introduce the structure of the display screen 220, and should not limit the specific components of the display screen 220. For example, the display screen 220 can also include a polarizer, which can be used to reduce reflection and improve display effect. The polarizer can be disposed on the touch layer, or can also be disposed below the touch layer.

[0068] In one example, the display screen 220 can be a flexible display screen, and in this example, the base material of the base layer of the display screen 220 can be PI. In another example, the display screen 220 can be a rigid display screen, and in this example, the base material of the base layer of the display screen 220 can be glass, and the base material of the encapsulation layer can also be glass. In yet another example, the display screen 220 can be a rigid and flexible encapsulation display screen, and in this example, the base material of the base layer can be glass, and the encapsulation layer can be a thin film encapsulation, and the material of the encapsulation layer can be PI.

[0069] In some embodiments, the spectral range corresponding to the material of the solar energy device 230 can match the transmittance range of the display screen 220. The spectral range corresponding to the material of the solar energy device 230 can refer to the wavelength range in which the material of the solar energy device 230 can effectively absorb light energy. For example, FIG. 6 is a graph showing the relationship between wavelength and transmittance of the display screen 220, in which the horizontal axis represents the wavelength range corresponding to the material of the solar energy device 230, and the vertical axis represents the transmittance of the display screen 220. When the wavelength range is the wavelength range corresponding to ultraviolet light, i.e., when the wavelength corresponding to the material of the solar energy device 230 is less than 400 nm, the transmittance of the display screen 220 is low. When the wavelength range is the wavelength range corresponding to visible light, i.e., when the wavelength corresponding to the material of the solar energy device 230 is in the range of 400-780 nm, the transmittance of the display screen 220 is high. When the wavelength corresponding to the material of the solar energy device 230 is in the range of infrared light, the transmittance of the display screen 220 is low. Therefore, the material of the solar energy device 230 can be a material corresponding to the wavelength range of visible light, or a plurality of materials combined to correspond to a wavelength range in the range of visible light, so that the solar energy device 230 can effectively absorb sunlight passing through the display screen 220 and convert it into electrical energy.

[0070] For example, the material of the solar energy device 230 can be a combination of one or more of gallium arsenide, perovskite, or silicon-based material. The silicon-based material can include single crystal silicon, polycrystalline silicon, or amorphous silicon, etc. The spectral response range of gallium arsenide is generally between 400 nm and 1100 nm, and gallium arsenide can effectively absorb the solar photon energy in this wavelength range. The light absorption spectrum wavelength of perovskite can reach 800 nm, and the light absorption spectrum wavelength of silicon-based material is also generally in the range of visible light. When the material of the solar energy device 230 is a combination of a plurality of the above-mentioned materials, it can mean that the material of the solar energy device 230 is a composite material formed by a plurality of the above-mentioned materials. The material of the solar energy device 230 being a combination of one or more of the above-mentioned materials can enable the solar energy device 230 to have a high solar energy conversion efficiency.

[0071] It should be noted that the material of the solar device 230 is gallium arsenide, perovskite or silicon-based material, and the like, which can refer to the substrate of the solar device 230 being gallium arsenide, perovskite or silicon-based material, and the like. The solar device 230 usually includes multiple functional layers, and different functional layers can include other elements or materials in addition to the above-mentioned materials. For example, for a gallium arsenide solar device 230, the solar device 230 can be doped with boron, phosphorus and the like to facilitate the separation of photo-generated electrons and holes. The solar device 230 can also include aluminum and the like as an anti-reflection layer to reflect unabsorbed light back to the cell, thereby increasing the light absorption and conversion efficiency. The perovskite or silicon-based solar device 230 is similar. In addition, in the embodiments provided in the present application, the material of the solar device 230 can also be other types of materials, such as copper indium gallium selenide, cadmium telluride, macromolecular or small molecular organic material, and the like. The present application does not limit the composition of the material of the solar device 230. In addition, the wavelength-transmittance curve shown in FIG. 6 is only used as an example to illustrate the relationship between the transmittance of the display screen and the wavelength of the material of the solar device 230. The curve relationship can change with the structure of the display screen, and the relationship between the two should not be limited.

[0072] Continuing to refer to the display module shown in FIG. 3, in some embodiments, the display screen 220 can include a first area 221 and a second area 222. The first area 221 can be an effective display area of the display screen 220, and the second area 222 can be arranged at the periphery of the first area 221. The projection of the first area 221 along a first direction can be located in the area where the solar device 230 is located. The first direction can be the stacking direction of the display module, that is, the z-axis direction shown in the figure. The area where the solar device 230 is located can be the area covered by the solar device 230 in the xy plane. The first area 221 is the AA area, and the second area 222 is the NA area. That is, the solar device 230 can be arranged below the entire AA area.

[0073] Since the display screen 220 is a light-transmitting structure with good visible light transmittance, the light-sensing area of the solar energy device 230 can be extended to the entire AA area, and the solar energy device 230 can collect solar energy using the entire AA area. Moreover, since the display screen 220 is a light-transmitting structure, part of the light energy generated by the display screen 220 can be emitted to the outside of the display module, that is, to the positive direction of the z-axis, and part of the light energy can be emitted to the inside of the display module, that is, to the negative direction of the z-axis. Among them, the light energy emitted to the inside of the display module can reach the surface of the solar energy device 230, and the solar energy device 230 can also convert the light energy generated by the display screen 220 into electrical energy, so that the solar energy device 230 has more opportunities to generate electrical energy, thereby improving the endurance of the wearable device. The solar energy device 230 is arranged below the display screen 220, and the solar energy device 230 is usually a non-transparent structure such as black with a certain reflectivity. The solar energy device 230 can reflect the light energy reaching the surface of the solar energy device 230 to enhance the brightness of the display screen 220 and improve the display effect of the display screen 220. The solar energy device 230 can also be used as a light-shielding structure of the display screen 220. The transmittance of the solar energy device 230 to visible light can be less than or equal to a preset threshold, thereby preventing light from passing through the solar energy device 230, so that the display module does not need to be additionally provided with a light-shielding structure, and the wearable device can have a relatively thin thickness.

[0074] The solar energy device 230 can be arranged below the first area 221, or can extend from below the first area 221 to below the second area 222. For example, the planar shape and size of the solar energy device 230 can be the same as the display screen, that is, when the display module has a circular shape along the xy plane, the diameter of the solar energy device 230 can be the same as the diameter of the display screen 220, when the solar energy device 230 has a rectangular shape along the xy plane, the size of the solar energy device 230 along the x-axis direction can be the same as the size of the display screen 220 along the x-axis direction, and the size of the solar energy device 230 along the y-axis direction can be the same as the size of the display screen 220 along the y-axis direction. The solar energy device 230 is arranged below the entire display screen 220, which can further improve the utilization rate of solar energy.

[0075] In some embodiments, the display module can further include a support 250, which can be disposed on the side of the solar device 230 away from the display screen, as shown in FIG. 7, and can be used to support the solar device 230. The material of the support 250 can be PI. The material of the support 250 being PI can make the wearable device thinner. In the prior structure shown in FIG. 2, the solar device 103 is disposed above the display screen 110, and the support 104 of the display module is also disposed above the display screen 110. In this case, the support 104 usually uses glass as the base material to reduce the influence of the support 104 on the display effect of the display screen. However, glass usually has a large thickness, which affects the thinness of the wearable device. In the present application, the solar device 230 is disposed below the display screen 220, and the support 250 of the display module is also disposed below the display screen 220. The material of the support 250 does not affect the display effect of the display screen 220. Therefore, using thinner PI as the support 250 of the display module can help to improve the thinness of the wearable device.

[0076] In some embodiments, the size of the support 250 along the first direction is less than or equal to 100 microns.

[0077] It should be understood that glass and the like can also be used as the base material of the support 250.

[0078] In some embodiments, the cover plate 210 can be a convex lens structure. As shown in FIG. 8, the cover plate 210 being a convex lens structure can mean that the entire cover plate 210 forms a convex lens structure, that is, the outer surface of the cover plate 210 can have an arc surface structure, and the arc surface structure can protrude away from the display screen 220. The cover plate 210 being a convex lens structure can be conducive to the convergence of sunlight, so that the solar device 230 can absorb more solar energy, thereby enabling the solar device 230 to generate more electric energy and improving the endurance of the wearable device.

[0079] It should be understood that the side of the cover plate 210 away from the display screen 220 is convex, and the side close to the display screen 220 is flat. Both sides of the cover plate 210 can also be convex.

[0080] In some embodiments, the display screen 220 can include a light condensing structure (not shown in the figure), which can be arranged in the first area 221, and the projection of the light condensing structure along the first direction can be located in the pixel gap of the display screen 220. Similar to the structure of the cover plate 210, the light condensing structure of the display screen 220 can also be a convex lens structure, the difference being that the number of the light condensing structure of the display screen 220 can be multiple, and multiple light condensing structures can be arranged in the pixel gap respectively. The light condensing structure of the display screen 220 can be arranged above the light emitting layer of the display screen 220 described in the above FIG. 4, or in other words, the light condensing structure can be arranged on the side of the light emitting layer close to the cover plate 210. For an OLED display screen, the light emitting layer is the structure layer where the light emitting material of the display screen 220 is located, and for a micro-LED display screen, the light emitting layer is the structure layer where the micro-LED chip is located.

[0081] Exemplarily, the light condensing structure can be arranged in the encapsulation layer of the display screen 220 described in the above FIG. 4, and the convex part of the light condensing structure can be directed towards the direction where the cover plate 210 is located. Alternatively, the light condensing structure can also be arranged between the encapsulation layer and the touch layer of the display screen 220, and the specific arrangement position of the light condensing structure is not limited in the present application.

[0082] By arranging the light condensing structure in the display screen 220, the sunlight can be condensed, so that more light is gathered on the surface of the solar energy device, thereby enabling the solar energy device to generate more electric energy and improving the endurance of the wearable device.

[0083] In some embodiments, the display module can further include a first circuit board 260, which can be arranged on the side of the solar energy device 230 away from the display screen 220, and the display screen 220 and the solar energy device 230 can be electrically connected with the first circuit board 260 respectively, and the first circuit board 260 can include an electrical connection interface 261, which can be used for the display screen 220 and the solar energy device 230 to be electrically connected with the main board of the wearable device.

[0084] It should be noted that in the production and processing process of the display module, the first circuit board 260 and the display screen 220 can be formed into an integral structure by welding or the like, and after being stacked with the solar device 230, the first circuit board 260 is folded under the solar device 230 by folding. The first circuit board 260 provided on the side of the solar device 230 away from the display screen 220 in the embodiment of the application can mean that the main part of the first circuit board 260 is provided on the side of the solar device 230 away from the display screen 220, and part of the structure of the first circuit board 260 can also be located on the side of the solar device 230 and the display screen 220, that is, it can be provided on one side of the solar device 230 and the display screen 220 along the positive direction of the y axis shown in the figure, so as to prevent the first circuit board 260 from being located between the solar device 230 and the display screen 220 and reduce the light absorption area of the solar device 230.

[0085] Referring to the partial structure schematic diagram of the display module shown in FIG. 9, the FIG. 9 can be a bottom view of the display module, that is, a structure schematic diagram when looking at the display module from the side of the solar device 230 away from the display screen 220. The first circuit board 260 can be a flexible printed circuit (FPC), which can also be referred to as a screen FPC, for transmitting electrical signals between the display screen 220 and the mainboard. The solar device 230 is electrically connected with the screen FPC, and can transmit electrical signals between the solar device 230 and the mainboard by using the screen FPC. Exemplarily, the solar device 230 can be electrically connected with the first circuit board 260 through the electrical connection points 270, one of the two electrical connection points 270 shown in the figure can be a positive electrode, and the other can be a negative electrode.

[0086] The electrical connection points of the solar device 230 and the first circuit board 260 can be located on the side of the solar device 230 away from the display screen 220, so as to prevent the arrangement of the electrical connection points from affecting the effective area of the solar device 230.

[0087] The first circuit board 260 can include an electrical connection interface 261, and the first circuit board 260 can be electrically connected with the mainboard through the electrical connection interface 261. For example, a board-to-board (BTB) connector can be arranged at the position of the electrical connection interface 261, and the electrical connection between the first circuit board 260 and the mainboard is realized by the clamping of the BTB connector.

[0088] That is, the solar energy device 230 and the display screen 220 can be electrically connected with the mainboard through the electrical connection interface 261 of the first circuit board 260, and the solar energy device 230 does not need to be provided with an additional electrical connection interface, so that the electrical connection interfaces can be reduced, the space of the mainboard plate surface can be occupied, and the small size of the wearable device can be realized.

[0089] In the example, when the display module includes the support 250, the support 250 and the first circuit board 260 are arranged on the side of the solar energy device 230 away from the display screen 220, and the support 250 can be arranged between the first circuit board 260 and the solar energy device 230, and the support 250 can be provided with an opening portion to facilitate the electrical connection between the first circuit board 260 and the solar energy device 230. Alternatively, the first circuit board 260 can be arranged between the solar energy device 230 and the support 250.

[0090] In some embodiments, the display screen 220 and the solar energy device 230 can also be electrically connected with the mainboard through different electrical connection interfaces. Referring to the structure shown in FIG. 10, which can also be a bottom view of the display module, the display module can include a first circuit board 260, which can be a screen FPC, and the end of the first circuit board 260 can be provided with an electrical connection interface 261, and the first circuit board 260 is electrically connected with the mainboard through the electrical connection interface 261. Different from the structure shown in FIG. 9, the solar energy device 230 can not be electrically connected with the mainboard through the first circuit board 260, and the display module can further include a second circuit board 280, and the solar energy device 230 can be electrically connected with the second circuit board 280. The other end of the second circuit board 280 can include an electrical connection interface 281, which is used to be electrically connected with the mainboard, so that the solar energy device 230 is electrically connected with the mainboard. Similarly to the first circuit board, a BTB connector can be arranged at the position of the electrical connection interface 281, and the electrical connection between the solar energy device 230 and the mainboard is realized through the buckling of the BTB connector. The second circuit board 280 can also be an FPC.

[0091] It should be understood that the structure shown in FIG. 10 schematically shows the arrangement position of the second circuit board 280, and the arrangement position of the second circuit board 280 should not be limited, for example, the second circuit board 280 can also be located on the opposite side of the electrical connection interface 261 along the x-axis direction, or the second circuit board 280 can also be arranged adjacent to the electrical connection interface 261, which is not limited in the present application.

[0092] It should be understood that the number of the solar devices 230 shown in the embodiments of the present application is one, and the solar devices 230 are arranged on the lower side of the display screen 220. The number of the solar devices 230 can also be multiple, and the display screen 220 covers the overall structure formed by the multiple solar devices 230. The multiple solar devices can be connected to the first circuit board 260 shown in FIG. 9 or the second circuit board 280 shown in FIG. 10, respectively, to provide power for the wearable device.

[0093] The embodiments of the present application also provide a wearable device, which can include any one of the display modules described above with reference to FIGS. 3-10. The wearable device can also include a main board, and the display screen 220 and the solar devices 230 in the display module can be electrically connected to the main board, respectively. For example, the wearable device can be a watch or a bracelet.

[0094] It should be noted that the display module described in the present application can also be applied to other electronic devices with display functions, such as mobile phones, tablets, notebook computers, etc., to improve the endurance of the electronic devices.

[0095] The above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A display module applied to a wearable device, characterized in that, The display module comprises a solar device, a display screen and a cover plate which are sequentially stacked; The display screen comprises a first area which is an effective display area of the display screen, and a projection of the first area along a first direction is located in an area where the solar device is located, and the first direction is a stacking direction of the display module; The display screen is a display screen with a self-luminous function, and the display screen is a light-transmitting structure, and at least part of light emitted by the display screen is irradiated on the solar device.

2. The display module of claim 1, wherein, The cover plate is a convex lens structure.

3. The display module of claim 1 or 2, wherein, The display screen is provided with a light collecting structure, and the light collecting structure is located in the first area, and a projection of the light collecting structure along the first direction is located in a pixel gap of the display screen.

4. The display module of claim 3, wherein, The display screen comprises a light emitting layer, and the light collecting structure is arranged on a side of the light emitting layer close to the cover plate.

5. The display module of any one of claims 1 to 4, wherein, The display module further comprises a first circuit board arranged on a side of the solar device away from the display screen, and the display screen is electrically connected with the first circuit board; The first circuit board comprises an electrical connection interface for electrically connecting the display screen with a main board of the wearable device.

6. The display module of claim 5, wherein, The solar device is electrically connected with the first circuit board, and the solar device is electrically connected with the main board of the wearable device through the electrical connection interface.

7. The display module of any one of claims 1-6, wherein, The display module further comprises a support arranged on a side of the solar device away from the display screen, and a material of the support is polyimide.

8. The display module of claim 7, wherein, A dimension of the support along the first direction is less than or equal to 100 microns.

9. The display module of any one of claims 1-8, wherein, The solar device is made of one or more of the following combinations: Gallium arsenide, perovskite or silicon-based material. 10.The display module of any one of claims 1-9, wherein, The solar device has a transmittance of visible light less than or equal to a preset threshold.

11. The display module of any one of claims 1-10, wherein, The display screen is an organic light emitting diode display screen or a micro light emitting diode display screen.

12. The display module of any one of claims 1-11, wherein, When the display screen is a micro light emitting diode display screen, the display screen comprises a first chip for realizing light emission of the display screen, and a dimension of the first chip along a second direction is less than 5 microns, and the second direction is perpendicular to the first direction.

13. A wearable device, comprising: The display module comprises a display module as claimed in any one of claims 1 to 12 and a main board, and the display module is electrically connected with the main board.

Images