Self-powered display device

Abstract

The invention provides a self-powered display device. The self-powered display device comprises a substrate, a first photoelectric conversion unit, a light-transmitting display module and a wireless charging module, wherein the substrate is provided with a display area and a non-display area; the first photoelectric conversion unit is arranged on the substrate and located in the display area. The light-transmitting display module is stacked on the first photoelectric conversion unit. The first light penetrates through the light-transmitting display module, and the first photoelectric conversion unit converts the first light into first electric energy and provides the first electric energy to the light-transmitting display module. The wireless charging module is arranged on the substrate and located in the non-display area, and the wireless charging module receives the second light rays, converts the second light rays into second electric energy and provides the second electric energy for the light-transmitting display module. The wavelength range of the first light is different from the wavelength range of the second light. Therefore, the power generation capacity can be improved and the wireless charging function is provided.

Description

Technical Field

[0001] This disclosure relates to a display device, and more particularly to a self-powered display device. Background Technology

[0002] Transmissive reflective displays (such as cholesteric liquid crystal displays, or ChLCDs) not only reflect ambient light to provide the image but also allow some ambient light to pass through to the bottom. A solar panel can be integrated into the bottom of the display to fully utilize ambient light and achieve self-powering. With advancements in display technology, display functions are becoming increasingly diverse. While bistable cholesteric liquid crystal displays are very energy-efficient, the solar panel, mounted at the bottom of the display, can only capture a portion of the light that passes through to generate electricity. This limited power output restricts the display's multifunctional applications, such as those requiring frequent image updates, communication capabilities, or use in spaces with insufficient ambient light. However, expanding the power generation by adding wireless charging functionality to the same solar panel still faces the challenge of the different absorption bands of the solar cells used for absorbing ambient light and those used for wireless charging.

[0003] In view of this, how to develop a self-powered display device with wireless charging function, while also having a simple production process and low manufacturing cost, has become the primary issue for businesses in related industries to solve. Summary of the Invention

[0004] Therefore, the purpose of this disclosure is to provide a self-powered display device that increases power generation by configuring a first photoelectric conversion unit for absorbing first light and a second light and a wireless charging module respectively on the substrate of a solar panel. Furthermore, in applications where wireless charging is not required, the retroreflector in the wireless charging module can be removed, and photoelectric conversion can still be performed through the second photoelectric conversion unit in the wireless charging module, thus increasing power generation. In summary, this disclosure solves the problem in the prior art where solar panels can only capture a portion of the light passing through the display to generate electricity, resulting in insufficient power generation to support the multi-functional applications of the display.

[0005] According to one embodiment of this disclosure, a self-powered display device is provided, comprising a substrate, a first photoelectric conversion unit, a light-transmitting display module, and a wireless charging module. The substrate has a display area and a non-display area. The first photoelectric conversion unit is disposed on the substrate and located in the display area. The light-transmitting display module is stacked on the first photoelectric conversion unit and is used to receive a first light source. The first light source penetrates the light-transmitting display module and enters the first photoelectric conversion unit, whereby the first photoelectric conversion unit converts the first light source into first electrical energy and provides the first electrical energy to the light-transmitting display module. The wireless charging module is disposed on the substrate and located in the non-display area, and is used to receive a second light source and convert the second light source into second electrical energy, providing the second electrical energy to the light-transmitting display module. A wavelength range of the first light source differs from a wavelength range of the second light source.

[0006] Other embodiments of the aforementioned implementation are as follows: The aforementioned self-powered display device further includes an energy storage module. The energy storage module is electrically connected to the first photoelectric conversion unit and the wireless charging module. The energy storage module is used to store first electrical energy and second electrical energy, and to provide the first electrical energy and second electrical energy to the light-transmitting display module.

[0007] Other embodiments of the aforementioned implementation are as follows: the aforementioned display area and non-display area are arranged adjacent to each other, and one area of ​​the display area is larger than one area of ​​the non-display area.

[0008] Other embodiments of the aforementioned implementation are as follows: the wavelength range of the first light is between 400nm and 700nm, and the wavelength range of the second light is between 700nm and 2500nm.

[0009] Other embodiments of the aforementioned implementation are as follows: The aforementioned wireless charging module includes a second photoelectric conversion unit and a retroreflector. The second photoelectric conversion unit is disposed on a substrate. The retroreflector is detachably disposed on the substrate and covers the second photoelectric conversion unit. A portion of the second light rays penetrates the retroreflector and enters the second photoelectric conversion unit, which converts this portion of the second light rays into second electrical energy.

[0010] Other embodiments of the aforementioned implementation are as follows: The aforementioned second photoelectric conversion unit is different from the first photoelectric conversion unit.

[0011] According to another embodiment of this disclosure, a self-powered display device is provided, comprising a substrate, a first photoelectric conversion unit, a light-transmitting display module, and a wireless charging module. The substrate has a display area and a non-display area. The first photoelectric conversion unit is disposed on the substrate and located in the display area. The light-transmitting display module is stacked on the first photoelectric conversion unit and is used to receive a first light beam. The first light beam passes through the light-transmitting display module and enters the first photoelectric conversion unit, whereby the first photoelectric conversion unit converts the first light beam into first electrical energy and provides the first electrical energy to the light-transmitting display module. The wireless charging module is used to receive a second light beam and includes a second photoelectric conversion unit and a retroreflector. The second photoelectric conversion unit is disposed on the substrate and located in the non-display area. The retroreflector is detachably disposed on the substrate and covers the second photoelectric conversion unit. A portion of the second light beam passes through the retroreflector and enters the second photoelectric conversion unit, whereby the second photoelectric conversion unit converts this portion of the second light beam into second electrical energy and provides the second electrical energy to the light-transmitting display module. A wavelength range of the first light beam is the same as a wavelength range of the second light beam.

[0012] Other embodiments of the aforementioned implementation are as follows: The aforementioned self-powered display device further includes an energy storage module. The energy storage module is electrically connected to the first photoelectric conversion unit and the second photoelectric conversion unit. The energy storage module is used to store the first electrical energy and the second electrical energy, and to provide the first electrical energy and the second electrical energy to the light-transmitting display module.

[0013] Other embodiments of the aforementioned implementation are as follows: the aforementioned display area and non-display area are arranged adjacent to each other, and one area of ​​the display area is larger than one area of ​​the non-display area.

[0014] Other embodiments of the aforementioned implementation are as follows: the wavelength range of the first light and the wavelength range of the second light are both between 400nm and 800nm.

[0015] Other embodiments of the aforementioned implementation are as follows: Both the first photoelectric conversion unit and the second photoelectric conversion unit are organic solar cells or perovskite solar cells. Attached Figure Description

[0016] Figure 1A This is a perspective view showing a self-powered display device in a first embodiment of a first embodiment according to the present disclosure;

[0017] Figure 1B It is shown Figure 1A A partially transparent top view of a self-powered display device;

[0018] Figure 1C It is shown Figure 1A A cross-sectional schematic diagram of a self-powered display device;

[0019] Figure 2This is a schematic diagram illustrating the wireless charging module of this disclosure performing wireless charging;

[0020] Figure 3A This is a partial transparent top view showing a self-powered display device in a second embodiment according to the first embodiment of the present disclosure;

[0021] Figure 3B It is shown Figure 3A A cross-sectional schematic diagram of a self-powered display device;

[0022] Figure 4 This is a partial transparent top view showing a self-powered display device in the first embodiment of the second embodiment according to the present disclosure;

[0023] Figure 5 This is an external quantum efficiency spectrum diagram showing that the first and second photoelectric conversion units of this disclosure are organic solar cells;

[0024] Figure 6 This is an external quantum efficiency spectrum diagram showing the first and second photoelectric conversion units of this disclosure as perovskite solar cells; and

[0025] Figure 7 This is a partial transparent top view showing a self-powered display device in a second embodiment according to the second embodiment of the present disclosure.

[0026] Symbol Explanation

[0027] 100, 200, 300, 400: Self-powered display devices

[0028] 110, 210, 310, 410: substrate

[0029] 120, 220, 320, 420: First photoelectric conversion unit

[0030] 130, 230, 330, 430: Transmitting display modules

[0031] 140, 340: Wireless charging module

[0032] 141, 241, 341, 441: Second photoelectric conversion unit

[0033] 142, 342, 520: Retroreflectors

[0034] 150, 250, 350, 450: Energy storage modules

[0035] 500: Light emitter

[0036] 510: Laser gain medium

[0037] A1: Display Area

[0038] A2: Non-display area

[0039] L1, L3, L5: First Rays

[0040] L2, L4, L6: Second Rays

[0041] P1: First electrical energy

[0042] P2: Second electrical energy Detailed Implementation

[0043] Several embodiments of this disclosure will be described below with reference to the accompanying drawings. For clarity, many practical details will be set forth in the following description. However, it should be understood that these practical details should not be used to limit the scope of this disclosure. That is, in some embodiments of this disclosure, these practical details are not essential. Furthermore, for the sake of simplicity in the drawings, some conventionally used structures and elements will be shown in a simple schematic manner; and repeated elements may be denoted by the same reference numerals.

[0044] Furthermore, in this document, when a component (or unit or module, etc.) is "connected / linked" to another component, it can mean that the component is directly connected / linked to the other component, or it can mean that the component is indirectly connected / linked to the other component, that is, there is another component between the component and the other component. Only when it is explicitly stated that a component is "directly connected / linked" to another component does it indicate that there is no other component between the component and the other component. The terms "first," "second," and "third" are only used to describe different components and do not limit the components themselves; therefore, "first component" can also be referred to as "second component." Moreover, the combinations of components / units / circuits in this document are not combinations generally known, conventional, or existing in this field. Whether the component / unit / circuit itself is existing cannot be used to determine whether its combination relationship is easily accomplished by a person skilled in the art.

[0045] Please refer to the following: Figure 1A , Figure 1B and Figure 1C ,in Figure 1A This is a perspective view showing a self-powered display device in a first embodiment of a first embodiment according to the present disclosure; Figure 1B It is shown Figure 1A A partially transparent top view of a self-powered display device; and Figure 1C It is shown Figure 1A A cross-sectional schematic diagram of a self-powered display device. (See diagram below.) Figures 1A to 1C As shown, the self-powered display device 100 includes a substrate 110, a first photoelectric conversion unit 120, a light-transmitting display module 130, and a wireless charging module 140.

[0046] The substrate 110 has a display area A1 and a non-display area A2. The display area A1 and the non-display area A2 are arranged adjacent to each other, and the area of ​​the display area A1 is larger than the area of ​​the non-display area A2. A first photoelectric conversion unit 120 is disposed on the substrate 110 and located in the display area A1. A light-transmitting display module 130 is electrically connected to and stacked on top of the first photoelectric conversion unit 120. The outer periphery of the light-transmitting display module 130 is aligned with the display area A1, that is, the area of ​​the top of the light-transmitting display module 130 is the same as the area of ​​the display area A1. The light-transmitting display module 130 is used to receive a first light ray L1 from the outside of the self-powered display device 100, and the first light ray L1 penetrates the light-transmitting display module 130 and enters the first photoelectric conversion unit 120. The first photoelectric conversion unit 120 converts the first light ray L1 into a first electrical energy P1, and provides the first electrical energy P1 to the light-transmitting display module 130 through its internal conductive wires (not shown). A wireless charging module 140 is disposed on the substrate 110 and located in the non-display area A2. The projected area of ​​the wireless charging module 140 in the non-display area A2 is the same as the area of ​​the non-display area A2. The wireless charging module 140 is used to receive a second light beam L2 and convert the second light beam L2 into a second electrical energy P2. The wireless charging module 140 provides the second electrical energy P2 to the light-transmitting display module 130 via conductive lines (not shown) inside the substrate 110. In some embodiments, the wireless charging module 140 may also be directly connected to the light-transmitting display module 130 and transmit the second electrical energy P2 from itself to the light-transmitting display module 130.

[0047] Furthermore, the wavelength range of the first light ray L1 differs from that of the second light ray L2. The first light ray L1 can be ambient light, either outdoor or indoor, and its wavelength range is between 400nm and 700nm. The second light ray L2 can be infrared (IR) light, and its wavelength range is between 700nm and 2500nm. Therefore, the self-powered display device 100 of this disclosure, by respectively configuring the first photoelectric conversion unit 120 and the wireless charging module 140 on the substrate 110, absorbs the first light ray L1 and the second light ray L2 with different wavelength ranges, and generates first electrical energy P1 and second electrical energy P2, thereby achieving the technical effect of increasing power generation. Therefore, the self-powered display device 100, by utilizing the wireless charging function, can solve the problem in the prior art where solar panels can only obtain a portion of the light penetrating the display to generate electricity, resulting in insufficient power generation to provide multi-functional applications for the display.

[0048] In some embodiments, the substrate 110 may be a backplate with a certain rigidity, and it is provided with multiple traces for transmitting control signals. The first photoelectric conversion unit 120 may be, but is not limited to, a silicon solar cell, a thin-film solar cell, an organic solar cell (OPV), a perovskite solar cell (PSC), or a dye-sensitized solar cell (DSSC), or other solar cells that can convert first light L1 with a wavelength range between 400 nm and 700 nm into first electrical energy P1.

[0049] The light-transmitting display module 130 can be, but is not limited to, a cholesterol liquid crystal display (ChLCD), a transflective liquid crystal display, a transparent organic light-emitting diode (OLED) display, or a transparent light-emitting diode (LED) display, or other displays that have image display capabilities and allow the first light ray L1 to pass through. In this embodiment, the light-transmitting display module 130 is a cholesterol liquid crystal display and has two stable states: a focal conic state and a planar state. By applying different voltages to the light-transmitting display module 130, the alignment state of the cholesterol liquid crystal molecules can be controlled to switch between the focal conic state and the planar state. When the light-transmitting display module 130 is in a planar arrangement, the cholesteric liquid crystal molecules are neatly arranged, so that the first light L1 is reflected to display the image; and when the light-transmitting display module 130 is in a focal conical arrangement, the cholesteric liquid crystal molecules are disordered, so that the first light L1 can penetrate to the bottom of the light-transmitting display module 130 and be absorbed by the first photoelectric conversion unit 120.

[0050] Please refer to the following: Figures 1A to 1C and Figure 2 ,in Figure 2 This is a schematic diagram illustrating the wireless charging module of this disclosure performing wireless charging. For example... Figures 1A to 1C and Figure 2As shown, the wireless charging module 140 can be a light receiver used in wireless charging technology to absorb light radiation, and may include a second photoelectric conversion unit 141 and a retroreflector 142. The second photoelectric conversion unit 141 can be, but is not limited to, a silicon solar cell, a thin-film solar cell, an organic solar cell, a perovskite solar cell, or a dye-sensitized solar cell, or other solar cells that can convert second light L2 with a wavelength range between 700nm and 2500nm into second electrical energy P2. However, the second photoelectric conversion unit 141 is different from the first photoelectric conversion unit 120; that is, the second photoelectric conversion unit 141 and the first photoelectric conversion unit 120 are different types of solar cells. The second photoelectric conversion unit 141 is disposed on the substrate 110 and located in the non-display area A2. The retroreflector 142 is detachably disposed on the substrate 110 and aligned with the non-display area A2, and covers the second photoelectric conversion unit 141. A portion of the second ray L2 can penetrate the retroreflector 142 and enter the second photoelectric conversion unit 141, so that the second photoelectric conversion unit 141 converts this portion of the second ray L2 into second electrical energy P2.

[0051] At Figure 2 In this design, the second ray L2 is generated by a light emitter 500 located outside the self-powered display device 100. The light emitter 500 includes a laser gain medium 510 and a retroreflector 520. One side of the laser gain medium 510 faces the wireless charging module 140, and the retroreflector 520 is disposed adjacent to the other side of the laser gain medium 510. The laser gain medium 510 may be made of a semiconductor material (e.g., gallium aluminum arsenide (GaAlAs)). When an electrical excitation input (e.g., an input voltage) is provided to the laser gain medium 510, a population inversion occurs within the laser gain medium 510, causing the laser gain medium 510 to emit multiple photons toward the wireless charging module 140. These multiple photons form the second ray L2, which is incident on the retroreflector 142 of the wireless charging module 140. Based on the optical characteristics of the retroreflector 142 (the reflectivity may be, but is not limited to, 95%), most of the second light rays L2 are reflected back to the laser gain medium 510 along the incident path, and the remaining second light rays L2 penetrate the retroreflector 142 and are absorbed by the second photoelectric conversion unit 141 and converted into second electrical energy P2.

[0052] In detail, the laser gain medium 510 is a component with high gain to achieve small size and high efficiency. Therefore, infrared light is the best choice as the source of wireless charging because it is easily converted into electrical energy. Light with a conversion wavelength range between 700nm and 2500nm is also a good choice. The laser gain medium 510 can be used to amplify the second light ray L2 reflected by the retroreflector 142; in other words, after receiving the second light ray L2 reflected by the retroreflector 142, the laser gain medium 510 emits more photons with the same quantum parameters (direction, wavelength, phase) back to the retroreflector 520, thereby amplifying the second light ray L2 reflected by the retroreflector 142. Then, the second light ray L2 strikes the retroreflector 520 again and, based on the optical properties of the retroreflector 520 (reflectivity may be, but is not limited to, 100%), is totally internally reflected back to the laser gain medium 510. The second light ray L2 passes through the laser gain medium 510 again and is amplified again, then returns along the incident path and partially penetrates the retroreflector 142. Therefore, at the second photoelectric conversion unit 141, a portion of the second light ray L2 is converted back into second electrical energy P2. The retroreflector 142 and the retroreflector 520 form a resonant cavity in free space. As long as the amplification of the laser gain medium 510 is sufficient to compensate for the portion of the second light ray L2 converted into second electrical energy P2 and the light path loss, the wireless charging process will continue. Therefore, the self-powered display device 100 of this disclosure, which uses light radiation as the source of wireless charging, has the following advantages: (1) high photoelectric conversion efficiency; (2) the photoelectric conversion efficiency is almost constant regardless of the distance between the light emitter 500 and the wireless charging module 140; (3) it does not affect wireless networks (WiFi), Bluetooth, or other electronic communication methods; and (4) the non-display area A2 has a small screen ratio and is mainly used to absorb laser light sources (infrared rays), while infrared rays have low air loss and high safety.

[0053] Additionally, the self-powered display device 100 may also include a power storage module 150, such as a rechargeable battery. The power storage module 150 is electrically connected to the first photoelectric conversion unit 120 and the second photoelectric conversion unit 141 of the wireless charging module 140 via conductive lines inside the substrate 110. Therefore, the power storage module 150 can receive and store first electrical energy P1 and second electrical energy P2 from the first photoelectric conversion unit 120 and the second photoelectric conversion unit 141, and provide the first electrical energy P1 and second electrical energy P2 to the light-transmitting display module 130 via the substrate 110.

[0054] Please refer to the following: Figure 3A and Figure 3B ,in Figure 3A This is a partial transparent top view showing a self-powered display device in a second embodiment according to the first embodiment of this disclosure; and Figure 3B It is shown Figure 3A A cross-sectional schematic diagram of a self-powered display device. (See diagram below.) Figure 3A and Figure 3B As shown, the self-powered display device 200 includes a substrate 210, a first photoelectric conversion unit 220, a light-transmitting display module 230, a second photoelectric conversion unit 241, and a power storage module 250, wherein the second photoelectric conversion unit 241 is different from the first photoelectric conversion unit 220. All components of the aforementioned self-powered display device 200 are... Figures 1A to 1C The corresponding components in the self-powered display device 100 are the same, so the same structural configuration and component functions will not be described again.

[0055] Unlike the self-powered display device 100, the self-powered display device 200 does not have a retroreflector mounted on the substrate 210. Specifically, in applications where wireless charging is not required, the retroreflector can be removed from the non-display area A2 of the substrate 210. The first photoelectric conversion unit 220 located in the display area A1 converts a first ray L3 incident from outside the self-powered display device 200 into first electrical energy P1, and the wavelength range of the first ray L3 is between 400nm and 700nm. In particular, the second photoelectric conversion unit 241 located in the non-display area A2 can directly absorb a second ray L4 with a wavelength range between 400nm and 2500nm and convert the second ray L4 into second electrical energy P2. This means that the second photoelectric conversion unit 241 can not only absorb and convert general visible light, but also absorb and convert longer wavelength infrared rays from sunlight, thereby increasing power generation.

[0056] Please see Figure 4 This is a partial transparent top view showing a self-powered display device according to a first embodiment of a second embodiment of the present disclosure. (See image below.) Figure 4 As shown, the self-powered display device 300 includes a substrate 310, a first photoelectric conversion unit 320, a light-transmitting display module 330, a wireless charging module 340, and a power storage module 350.

[0057] The substrate 310 has a display area A1 and a non-display area A2. A first photoelectric conversion unit 320 is disposed on the substrate 310 and located in the display area A1. A light-transmitting display module 330 is stacked on the first photoelectric conversion unit 320 and is used to receive a first light ray L5. The first light ray L5 passes through the light-transmitting display module 330 and enters the first photoelectric conversion unit 320. The first photoelectric conversion unit 320 converts the first light ray L5 into a first electrical energy P1 and provides the first electrical energy P1 to the light-transmitting display module 330. A wireless charging module 340 is used to receive a second light ray L6 and includes a second photoelectric conversion unit 341 and a retroreflector 342. The second photoelectric conversion unit 341 is disposed on the substrate 310 and located in the non-display area A2. The retroreflector 342 is detachably disposed on the substrate 310 and covers the second photoelectric conversion unit 341. A portion of the second light ray L6 passes through the retroreflector 342 and enters the second photoelectric conversion unit 341. The second photoelectric conversion unit 341 converts this portion of the second light ray L6 into second electrical energy P2 and provides the second electrical energy P2 to the light-transmitting display module 330. Specifically, apart from the first photoelectric conversion unit 320 and the second photoelectric conversion unit 341, all other components in the self-powered display device 300 are connected to... Figure 1B The corresponding components in the self-powered display device 100 are the same, so the same structural configuration and component functions will not be described again.

[0058] Unlike the self-powered display device 100, the first photoelectric conversion unit 320 and the second photoelectric conversion unit 341 of the self-powered display device 300 are both organic solar cells or perovskite solar cells, meaning that the first photoelectric conversion unit 320 and the second photoelectric conversion unit 341 are the same type of solar cell. In this embodiment, the wavelength range of the first light L5 absorbed by the first photoelectric conversion unit 320 is the same as the wavelength range of the second light L6 absorbed by the second photoelectric conversion unit 341, and the wavelength ranges of both the first light L5 and the second light L6 are between 400nm and 800nm. The aforementioned configuration is based on the following reasons.

[0059] Generally speaking, the absorption bands (i.e., wavelength ranges) of solar cells on the back of a display and those used for wireless charging are very different. The main absorption band of solar cells on the back of a display is between 400nm and 700nm, which is visible light. The main absorption band of solar cells used for wireless charging is between 700nm and 2500nm, which is infrared light. If different types of solar cells are configured on the display area A1 and the non-display area A2, different charging chips will be needed to collect the photoelectric converted energy, boost it, and store it in the energy storage module 350 due to the different electrical properties of the two solar cells. On the other hand, if the same type of solar cells are configured on the display area A1 and the non-display area A2, that is, if the first photoelectric conversion unit 320 and the second photoelectric conversion unit 341 are to be configured with the same solar cells, then the issue of spectral matching needs to be considered.

[0060] Please continue reading. Figure 5 and Figure 6 ,in Figure 5 This is a spectrum of the external quantum efficiency (EQE) of the first and second photoelectric conversion units of this disclosure as organic solar cells; and Figure 6 This diagram illustrates the external quantum efficiency spectrum of the first and second photoelectric conversion units, which are perovskite solar cells, as described in this disclosure. It should be noted that in this embodiment, the light-transmitting display module 330 is a cholesteric liquid crystal display, which has high transmittance for light with wavelengths between 600nm and 780nm. Therefore, the first photoelectric conversion unit 320 must be a solar cell with an external quantum efficiency that allows for high power generation for light with wavelengths between 600nm and 780nm. Furthermore, to improve the charging efficiency of the wireless charging module 340, the second photoelectric conversion unit 341 must also be a solar cell with high external quantum efficiency in the infrared band. Figure 5 As shown, when both the first photoelectric conversion unit 320 and the second photoelectric conversion unit 341 are organic solar cells, the self-powered display device 300 can achieve an external quantum efficiency of 50% to 80% in the wavelength range between 400 nm and 800 nm. Figure 6As shown, when both the first photoelectric conversion unit 320 and the second photoelectric conversion unit 341 are perovskite solar cells, the external quantum efficiency of the self-powered display device 300 in the wavelength range between 400nm and 800nm ​​can also reach 50% to 80%. Therefore, the self-powered display device 300 of this disclosure not only realizes the wireless charging function, but also reduces production steps, lowers costs, and simplifies the internal circuit design of the device by arranging the same type of solar cells on the display area A1 and the non-display area A2.

[0061] Please see Figure 7 The image shows a partial transparent top view of a self-powered display device according to a second embodiment of the present disclosure. Figure 7 As shown, the self-powered display device 400 includes a substrate 410, a first photoelectric conversion unit 420, a light-transmitting display module 430, a second photoelectric conversion unit 441, and a power storage module 450, wherein the second photoelectric conversion unit 441 is identical to the first photoelectric conversion unit 420. All components of the aforementioned self-powered display device 400 are... Figure 4 The corresponding components in the self-powered display device 300 are the same, so the same structural configuration and component functions will not be described again.

[0062] Unlike the self-powered display device 300, the self-powered display device 400 does not have a retroreflector on the substrate 410. Specifically, in applications where wireless charging is not required, the retroreflector can be removed from the non-display area A2 of the substrate 410. The first photoelectric conversion unit 420 located in the display area A1 converts a first light ray L5 incident from outside the self-powered display device 400 into first electrical energy P1, and the wavelength range of the first light ray L5 is between 400nm and 800nm. In particular, the second photoelectric conversion unit 441 located in the non-display area A2 also directly absorbs a second light ray L6 with a wavelength range between 400nm and 800nm ​​and converts the second light ray L6 into second electrical energy P2. This means that both the first photoelectric conversion unit 420 and the second photoelectric conversion unit 441 can absorb and convert ambient light, thereby increasing the power generation.

[0063] In summary, the present disclosure has the following advantages: First, by installing a wireless charging module on a non-display area with a small screen size, the total power generation of the self-powered device can be increased by utilizing the wireless charging function. Second, the reflector can be directly removed when wireless charging is not needed, while still maintaining high power generation. Third, by configuring the same type of solar cells on both the display and non-display areas, the device achieves the effects of simple manufacturing process, low cost, and simplified internal circuit design.

[0064] Although the present disclosure has been described above with reference to embodiments, it is not intended to limit the present disclosure. Any person skilled in the art may make various changes and modifications without departing from the concept and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the claims.

Claims

1. A self-powered display device, characterized in that, Include: A substrate having a display area and a non-display area; A first photoelectric conversion unit is disposed on the substrate and located in the display area; A light-transmitting display module is stacked on the first photoelectric conversion unit and used to receive a first light source, wherein the first light source passes through the light-transmitting display module and enters the first photoelectric conversion unit, the first photoelectric conversion unit converts the first light source into a first electrical energy and provides the first electrical energy to the light-transmitting display module; as well as A wireless charging module is disposed on the substrate and located in the non-display area. The wireless charging module is used to receive a second light and convert the second light into a second electrical energy, and provide the second electrical energy to the light-transmitting display module. The wavelength range of the first light ray is different from the wavelength range of the second light ray.

2. The self-powered display device as described in claim 1, characterized in that, Also includes: An energy storage module is electrically connected to the first photoelectric conversion unit and the wireless charging module. The energy storage module is used to store the first electrical energy and the second electrical energy, and to provide the first electrical energy and the second electrical energy to the light-transmitting display module.

3. The self-powered display device as described in claim 1, characterized in that, The display area is located adjacent to the non-display area, and one area of ​​the display area is larger than one area of ​​the non-display area.

4. The self-powered display device as described in claim 1, characterized in that, The wavelength range of the first ray is between 400nm and 700nm, and the wavelength range of the second ray is between 700nm and 2500nm.

5. The self-powered display device as described in claim 1, characterized in that, The wireless charging module includes: A second photoelectric conversion unit is disposed on the substrate; and A retroreflector is detachably mounted on the substrate and covers the second photoelectric conversion unit; A portion of the second light ray penetrates the retroreflector and enters the second photoelectric conversion unit, which converts that portion of the second light ray into the second electrical energy.

6. The self-powered display device as described in claim 5, characterized in that, The second photoelectric conversion unit is different from the first photoelectric conversion unit.

7. A self-powered display device, characterized in that, Include: A substrate having a display area and a non-display area; A first photoelectric conversion unit is disposed on the substrate and located in the display area; A light-transmitting display module is stacked on the first photoelectric conversion unit and used to receive a first light source, wherein the first light source passes through the light-transmitting display module and enters the first photoelectric conversion unit, the first photoelectric conversion unit converts the first light source into a first electrical energy and provides the first electrical energy to the light-transmitting display module; and A wireless charging module for receiving a second light beam, and comprising: A second photoelectric conversion unit is disposed on the substrate and located in the non-display area; and A retroreflector is detachably mounted on the substrate and covers the second photoelectric conversion unit, wherein a portion of the second light rays passes through the retroreflector and enters the second photoelectric conversion unit, and the second photoelectric conversion unit converts the portion of the second light rays into a second electrical energy and provides the second electrical energy to the light-transmitting display module; Wherein, the wavelength range of the first light ray is the same as the wavelength range of the second light ray.

8. The self-powered display device as described in claim 7, characterized in that, Also includes: An energy storage module is electrically connected to the first photoelectric conversion unit and the second photoelectric conversion unit. The energy storage module is used to store the first electrical energy and the second electrical energy, and to provide the first electrical energy and the second electrical energy to the light-transmitting display module.

9. The self-powered display device as described in claim 7, characterized in that, The display area is located adjacent to the non-display area, and one area of ​​the display area is larger than one area of ​​the non-display area.

10. The self-powered display device as described in claim 7, characterized in that, The wavelength range of both the first and second rays is between 400 nm and 800 nm.

11. The self-powered display device as described in claim 7, characterized in that, Both the first photoelectric conversion unit and the second photoelectric conversion unit are organic solar cells or perovskite solar cells.

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