TWI860856B - Solar cell structure of display panel - Google Patents

Abstract

The present invention provides a solar cell structure of display panel, in which the second solar cell layer is located in the electrical connection area so that it does not affect the display panel and at the same time increases the light-exposed area of the solar cell, which in turn increases the power supply of the solar cell, and the power supplied from the solar cell can be transmitted to the flexible circuit board through the wires connecting the first solar cell layer, the second solar cell layer and the flexible circuit board to solve the disadvantage of the conventional transmission of power through series connection between solar cells, which has higher power loss. By connecting the first solar cell layer, the second solar cell layer and the flexible circuit board, it can transmit the power provided by the solar cells to the flexible circuit board through the wires to solve the disadvantage of the large power loss when the power is transmitted through the series connection between the solar cells.

Description

Display panel solar cell structure

The present invention relates to a solar cell and a display device, in particular to a solar cell structure of a display panel.

When portable electronic products are used for activities outdoors, the battery power inside the product will also be consumed after long-term use. Therefore, portable electronic products will also move to high-capacity batteries, reduce losses, or integrate solar batteries inside for additional charging to increase battery life.

Portable electronic products usually use chemical power sources to provide power for the device. Since the battery life of chemical power sources is limited, after a period of use, the chemical power source must be replaced with a new one or the chemical power source must be charged to ensure the normal operation of the electronic device, which brings inconvenience to the user. Before the chemical power source is exhausted and a new one is not replaced, or during the charging of the chemical power source, the user cannot use the electronic device.

If solar cells are used to capture energy from the environment and charge the chemical power source of portable electronic products, the chemical power source will continue to power the wearable electronic devices, which is one of the solutions to solve the problem of continuous operation of wearable electronic devices and insufficient power of portable electronic products.

In practical applications, in order to effectively capture energy to meet the needs of electronic devices, solar cells need high photoelectric conversion efficiency and the largest possible light-receiving area. In common electronic devices, the display is the part with the highest probability of receiving light, and it is the best location to lay solar cells. Integrating solar cells in display devices can avoid occupying additional area of electronic devices such as electronic devices, maintain its small and portable characteristics, and is conducive to the miniaturization of electronic devices such as electronic devices.

The most common working principle of display devices is to emit light from the display screen to the human eyeball (luminescence); on the contrary, solar cells need to absorb as much light as possible in the environment to prevent light from overflowing (light absorption). If solar cells and display panels are directly stacked together, the two will interfere with each other optically and cannot realize their respective functions normally.

The current solution is usually to use translucent solar cells stacked on the display screen to form a display panel with energy capture characteristics. Such solar cells only absorb infrared light or ultraviolet light, while visible light (400nm-800nm) can directly penetrate the solar cell without being absorbed, so that the display panel can work normally. However, the disadvantage of this solution is that the utilization rate of solar energy is extremely low. In the normal solar spectrum, the energy of infrared and ultraviolet light only accounts for about 10% of the entire solar spectrum. In addition, the photoelectric conversion efficiency of solar cells is usually less than 30%. In the end, only about 3% of solar energy can be used. In addition, there is almost no infrared and ultraviolet light in the light emitted by many indoor light sources (cold light sources), which greatly limits the application of this method.

In addition, a display panel usually has a polarizer on its outer side, which causes light to be filtered, which in turn causes the solar cells placed near the display panel to have poor efficiency in receiving light, and the solar cells cannot generate electricity effectively or generate insufficient electricity.

Therefore, display panel-related technologies are not limited to making them thinner and lighter for easy carrying when going out, increasing battery capacity, or simply adding solar cells to improve the battery life of display panels. The traditional manufacturing yield of various electrical products, the conversion efficiency of solar cells themselves, increasing the light-receiving area of solar cells, and how to make display panels and solar cells coexist are also what the industry has been pursuing.

In order to achieve better conversion efficiency of the electricity generated by the solar cell in the display panel and enable the solar cell to have a larger light-receiving area in the display panel, the present invention provides a solar cell structure with a display panel to serve the general public and promote the development of this industry.

One of the purposes of the present invention is to provide a solar cell structure for a display panel that does not interfere with the display panel, has better photoelectric conversion efficiency, and has a larger light-receiving area than the conventional ones.

In view of the above-mentioned purpose, the present invention provides a solar cell structure for a display panel, which includes: a polarizing layer; an optical substrate, which is arranged above the polarizing layer; a display area, which is arranged above the optical substrate, and includes: a color filter layer, which is arranged above the optical substrate; a first solar cell layer, which wraps an outer side of the color filter layer; a protective layer, which wraps an outer side of the first solar cell layer and is arranged on the optical substrate; a liquid crystal layer, which is arranged above the color filter layer and the protective layer; and a sealing layer, which is arranged above the protective layer, and the sealing layer is adjacent to the liquid crystal layer. Liquid crystal layer; an electrical connection area, which is adjacent to the first solar cell layer and disposed above the optical substrate, comprising: a flexible circuit board, which is disposed above the optical substrate; and a second solar cell layer, which is disposed above the optical substrate, the second solar cell layer is disposed between an orthographic projection area of the sealing layer and the flexible circuit board, the second solar cell layer is electrically connected to the first solar cell layer and the flexible circuit board, and the protective layer wraps an outer side of the second solar cell layer; so that it will not affect the display panel while increasing the light receiving area of the solar cell, thereby increasing the power supply of the solar cell.

The present invention provides an embodiment, wherein the first solar cell layer is electrically connected to the second solar cell layer through a first wiring and a second wiring.

The present invention provides an embodiment, wherein the first solar cell layer and the second solar cell layer are formed in one piece.

The present invention provides an embodiment, wherein the second solar cell layer is electrically connected to the flexible circuit board through a third trace and a fourth trace.

The present invention provides an embodiment, which further includes: a third solar cell layer, which is sandwiched between the optical substrate and the sealing layer, the third solar cell layer is arranged in the orthographic projection area of the sealing layer, the third solar cell layer is electrically connected to the first solar cell layer and the second solar cell layer, and the protective layer covers an outer side of the third solar cell layer.

The present invention provides an embodiment, wherein the first solar cell layer, the second solar cell layer and the third solar cell layer are formed in one piece.

The present invention provides an embodiment, wherein the second solar cell layer is at least 0.1 mm away from the flexible circuit board.

The present invention provides an embodiment, wherein the second solar cell layer is electrically connected to the flexible circuit board through a third trace and a fourth trace.

The present invention provides an embodiment, wherein the second solar cell layer further comprises: a second lower electrode layer, which is disposed above the optical substrate; a second photoelectric conversion layer, which is disposed above the second lower electrode layer; a second upper electrode layer, which is disposed above the second photoelectric conversion layer; and a second transmission electrode layer, which is disposed above the second upper electrode layer, and the second transmission electrode layer is coupled to the third wiring and the fourth wiring.

The present invention provides an embodiment, wherein the first solar cell layer is electrically connected to the flexible circuit board through the third trace and the fourth trace.

The present invention provides an embodiment, wherein the first solar cell layer further comprises: a first lower electrode layer, which is disposed above the optical substrate; a first photoelectric conversion layer, which is disposed above the first lower electrode layer; a first upper electrode layer, which is disposed above the first photoelectric conversion layer; and a first transmission electrode layer, which is disposed above the first upper electrode layer, and the first transmission electrode layer is coupled to the third wiring and the fourth wiring.

The present invention provides an embodiment, wherein the flexible circuit board includes: a charging control circuit, which is used to transmit the electric energy generated by the first solar battery layer and the second solar battery layer to a storage element; the storage element is coupled to the charging control circuit, and the storage element is used to store the electric energy generated by the first solar battery layer and the second solar battery layer; and a conversion circuit, which is coupled to the charging control circuit and is used to convert the voltage of the electric energy generated by the first solar battery layer and the second solar battery layer.

In order to help you, the Review Committee, have a deeper understanding and knowledge of the features and effects of the present invention, we would like to provide a better embodiment and a detailed description as follows: It is known that if solar cells are combined with display panels, not only will the display panel and solar cells interfere with each other, but the photoelectric conversion efficiency of solar cells is also poor, and the light receiving area of solar cells is also small, so they cannot generate enough electricity for electronic devices to use. The power supply is unstable, causing the display panel to easily go wrong or be damaged.

The present invention improves the solar cell structure of the display panel, not only making the photoelectric conversion efficiency of the solar cell higher than the conventional method, but also making the solar cell have a larger light-receiving area than the conventional method. Moreover, the structure of the present invention also prevents the display panel and the solar cell from interfering with each other, and enables them to realize their respective functions.

In the following, the present invention will be described in detail by illustrating various embodiments of the present invention with reference to drawings. However, the concept of the present invention may be embodied in many different forms and should not be construed as being limited to the exemplary embodiments described herein.

First, please refer to Figure 1, which is a schematic diagram of a solar cell structure of a known display panel. As shown in the figure, it includes: an optical substrate 1, which includes: a display area 10; a solar cell layer 12, which is arranged in the display area 10 and on the optical substrate 1; an electrical connection area 20, which is adjacent to the display area 10, a flexible circuit board 14, which is arranged in the electrical connection area 20 and on the optical substrate 1; a third wiring 17, which is used to connect the solar cell layer 12 and the flexible circuit board 14; and a fourth wiring 18, which is used to connect the solar cell layer 12 and the flexible circuit board 14.

It can be seen that the solar cell layer 12 is connected in series by multiple solar cells, and the current is transmitted to the third wiring 17 or the fourth wiring 18 through the series solar cells. There is still a lot of unused space in the electrical connection area 20. If the unused space in this area can be filled, more solar cell light receiving areas can be added, thereby increasing the power generation of the solar cell.

Continuing with the above, please refer to FIG. 2A, which is a schematic diagram of the structure of the first embodiment of the present invention. As shown in the figure, it includes: an optical substrate 1, which includes: a display area 10; a first solar cell layer 22, which is arranged in the display area 10 and on the optical substrate 1; an electrical connection area 20, which is adjacent to the display area 10 and arranged above the optical substrate 1; A flexible circuit board 14 is disposed in the electrical connection area 20 and on the optical substrate 1; a second solar cell layer 24 is disposed in the electrical connection area 20 and on the optical substrate 1; a first wiring 15 is used to connect the first solar cell layer 22 and the second solar cell layer 24 and transmit the electric energy generated by the first solar cell layer 22 to the optical substrate 1; a second wiring 16 for connecting the first solar cell layer 22 and the second solar cell layer 24 and transmitting the electric energy generated by the first solar cell layer 22 to the second solar cell layer 24; a third wiring 17 for connecting the second solar cell layer 24 and the flexible circuit board 14 and transmitting the electric energy generated by the first solar cell layer 22 to the second solar cell layer 24; The electric energy generated by the solar cell layer 22 and the second solar cell layer 24 is transmitted to the flexible circuit board 14; the fourth trace 18 is used to connect the second solar cell layer 24 and the flexible circuit board 14, and transmit the electric energy generated by the first solar cell layer 22 and the second solar cell layer 24 to the flexible circuit board 14, and a symmetric axis AA'.

In the first embodiment of the present invention, a first gap D1 is set between the optical substrate 1 and the first solar cell layer 22 and the second solar cell layer 24. The first gap D1 is 0.05 mm. The purpose of setting is to avoid affecting the cutting. A second gap D2 is set between the flexible circuit board 14 and the second solar cell layer 24. The second gap D2 is 0.1 mm, and its purpose is to prevent the flexible circuit board 14 from contacting the second solar cell layer 24. The flexible circuit board 14 needs to withstand thermal pressure to be fixed on the optical substrate 1. In order to prevent the thermal pressure from damaging the second solar cell layer 24, the second gap D2 is set between the flexible circuit board 14 and the second solar cell layer 24.

The first embodiment of the present invention further sets the second solar cell layer 24 in the electrical connection area 20, so that the area that can be solar-charged is larger, and compared with the prior art, there can also be a larger light-receiving area, thereby increasing the power generation of the solar cell.

Continuing with the above, please refer to FIG. 2A, FIG. 2B, FIG. 2C and FIG. 2D. FIG. 2B is a cross-sectional view of the structure of the first embodiment of the present invention. FIG. 2C is a cross-sectional view of the display area of the first embodiment of the present invention. FIG. 2D is a cross-sectional view of the electrical connection area of the first embodiment of the present invention. FIG. 2B, FIG. 2C and FIG. 2D are cross-sectional views of FIG. 2A of the present invention taken along the symmetry axis AA'. As shown in the figure, the structure of the first embodiment of the present invention includes: the optical base The display area 10 is disposed on the optical substrate 1, and the display area 10 further includes: a color filter layer 40 disposed on the optical substrate 1; the first solar cell layer 22 is disposed in the display area 10 and on the optical substrate 1, and covers an outer side of the color filter layer 40; a protective layer 19, a portion of the protective layer 19 covers the first solar cell layer 22; a liquid crystal layer 42 is disposed on the protective layer 19 and the color filter layer 40; The optical filter layer 40 is disposed on the optical substrate 10; a sealing layer 44 is disposed adjacent to the liquid crystal layer 42 and disposed on the protective layer 19; a polarizing layer 50 is disposed corresponding to the display area 10 and is located below the optical substrate 1; the electrical connection area 20 is disposed adjacent to the display area 10 and disposed above the optical substrate 1, and the electrical connection area 20 further includes: the second solar cell layer 24 is disposed on the optical substrate 1 and is disposed in an orthographic projection area of the sealing layer 44 and the The second solar cell layer 24 is electrically connected to the first solar cell layer 22 and the flexible circuit board 14; a portion of the protective layer 19 encapsulates the second solar cell layer 24; the flexible circuit board 14 is disposed on the optical substrate 1; an array element 46 is disposed on the liquid crystal layer 42 and the sealing layer 44; an array substrate 48 is disposed on the array element 46, wherein the light incident side is below the polarizing layer 50.

Continuing from the above, the first embodiment of the present invention, by adding a second solar cell 24 in the electrical connection area 20, can provide a better power generation environment for the solar cell through a larger light receiving area compared to the prior art, so that the solar cell can provide more environmentally friendly energy, and the structure of the first embodiment of the present invention is set in the electrical connection area 20 The second solar cell layer 24 is placed on the surface of the second solar cell layer 24. Since the polarizing layer 50 is placed at a position that does not cover the second solar cell layer 24, it will not be affected by the polarizing layer 50, thereby reducing the power generation efficiency of the second solar cell layer 24. The light can directly irradiate the second solar cell layer 24 to improve the power generation efficiency.

Next, refer to FIG. 3A, which is a schematic diagram of the structure of the second embodiment of the present invention. As shown in the figure, the structure includes: the optical substrate 1, which includes: the display area 10; the first solar cell layer 22, which is arranged in the display area 10 and on the optical substrate 1, and includes an outer side of the color filter layer 40; the electrical connection area 20, which is adjacent to the display area 10 and arranged above the optical substrate 1, the flexible circuit board 14, which is arranged in the electrical connection area 20 and on the optical substrate 1; the second solar cell layer 24, which is arranged in the electrical connection area 20 and on the optical substrate 1, and adjacent to the first solar cell layer 22; the third wiring 17, which The fourth wiring 18 is used to connect the second solar cell layer 24 and the flexible circuit board 14, and transmit the power generated by the second solar cell layer 24 to the flexible circuit board 14; the fourth wiring 18 is used to connect the second solar cell layer 24 and the flexible circuit board 14, and transmit the power generated by the second solar cell layer 24 to the flexible circuit board 14. The second embodiment of the present invention is different from the first embodiment of the present invention in that the first solar cell layer 22 and the second solar cell layer 24 are connected in parallel or in series, instead of being connected through the first trace 15 and the second trace 16 as in the first embodiment of the present invention.

The reasons for setting the first gap D1 and the second gap D2 in the second embodiment of the present invention have been described in the first embodiment of the present invention, so they will not be repeated here.

The second embodiment of the present invention further sets the second solar cell layer 24 in the electrical connection area 20, so that the area capable of solar charging is larger, and compared with the prior art, there can also be a larger light-receiving area, thereby increasing the power generation of the solar cell.

Continuing with the above, please refer to FIG. 3A, FIG. 3B, FIG. 3C and FIG. 3D. FIG. 3B is a cross-sectional view of the structure of the second embodiment of the present invention, FIG. 3C is a cross-sectional view of the display area of the second embodiment of the present invention, and FIG. 3D is a cross-sectional view of the electrical connection area of the second embodiment of the present invention. FIG. 3B, FIG. 3C and FIG. 3D are cross-sectional views of FIG. 3A of the present invention taken along the symmetry axis AA'. As shown in the figure, the structure of the second embodiment of the present invention includes: the optical substrate 1; the display area 10, which is provided The display area 10 is disposed on the optical substrate 1. The display area 10 further includes: the color filter layer 40, which is disposed on the optical substrate 1; the first solar cell layer 22, which is disposed in the display area 10 and on the optical substrate 1 and covers an outer side of the color filter layer 40; the protective layer 19, a portion of which covers the first solar cell layer 22; the liquid crystal layer 42, which is disposed on the protective layer 19 and on the color filter layer 40; the sealing layer 44, which is adjacent to the liquid crystal layer 42, and disposed on the protective layer 19; the polarizing layer 50 is disposed corresponding to the display area 10 and is located below the optical substrate 1; the electrical connection area 20 is adjacent to the display area 10 and disposed above the optical substrate 1, and the electrical connection area 20 further includes: the second solar cell layer 24, which is disposed on the optical substrate 1 and adjacent to the first solar cell layer 22; the protective layer 19 partially encloses the second solar cell layer 24; the flexible circuit board 14, which is disposed on the optical substrate 1; the array element 46 is disposed on the liquid crystal layer 42 and the sealing layer 44; the array substrate 48 is disposed on the array element 46. As shown in the figure, the difference between the second embodiment of the present invention and the first embodiment of the present invention is that the first solar cell layer 22 and the second solar cell layer 24 are connected in parallel or in series, and are not connected through the first wiring 15 and the second wiring 16 as in the first embodiment of the present invention, wherein the light incident side is below the polarizing layer 50.

In the second embodiment of the present invention, the first solar cell layer 22 and the second solar cell layer 24 can be an integrally formed solar cell.

Continuing from the above, the second embodiment of the present invention, by adding a second solar cell 24 in the electrical connection area 20, can provide a better power generation environment for the solar cell through a larger light receiving area compared to the prior art, so that the solar cell can provide more environmentally friendly energy. In addition, the structure of the second embodiment of the present invention sets the second solar cell layer 24 in the electrical connection area 20. Since the position where the polarizing layer 50 is set does not cover the second solar cell layer 24, it will not be affected by the polarizing layer 50, thereby reducing the power generation efficiency of the second solar cell layer 24, and can allow light to directly irradiate the second solar cell layer 24 to improve the power generation efficiency.

Next, refer to FIG. 4A, which is a schematic diagram of the structure of the third embodiment of the present invention. As shown in the figure, the structure includes: the optical substrate 1, which includes: the display area 10; the first solar cell layer 22, which is arranged in the display area 10 and on the optical substrate 1, and covers an outer side of the color filter layer 40; and a third solar cell layer 26, which is arranged in the display area 10 and on the optical substrate 1. and adjacent to the first solar cell layer 22; the electrical connection area 20 is adjacent to the display area 10 and disposed above the optical substrate 1; the flexible circuit board 14 is disposed in the electrical connection area 20 and on the optical substrate 1; the second solar cell layer 24 is disposed in the electrical connection area 20 and on the optical substrate 1, and adjacent to the third solar cell layer 26; the third wiring 17 is The fourth wiring 18 is used to connect the second solar cell layer 24 and the flexible circuit board 14, and transmit the power generated by the second solar cell layer 24 to the flexible circuit board 14; the fourth wiring 18 is used to connect the second solar cell layer 24 and the flexible circuit board 14, and transmit the power generated by the second solar cell layer 24 to the flexible circuit board 14; and the symmetry axis AA', as shown in the figure, is in parallel with the present invention. The difference from the first embodiment is that the third embodiment of the present invention is to set the third solar cell layer 26 between the first solar cell layer 22 and the second solar cell layer 24, and connect the first solar cell layer 22, the third solar cell layer 26 and the second solar cell layer 24 in parallel or in series, instead of connecting through the first wiring 15 and the second wiring 16 as in the first embodiment of the present invention.

The reasons for setting the first gap D1 and the second gap D2 in the third embodiment of the present invention have been described in the first embodiment of the present invention, so they will not be repeated here.

The third embodiment of the present invention further sets the second solar cell layer 24 in the electrical connection area 20, so that the area capable of solar charging is larger, and compared with the prior art, there can also be a larger light-receiving area, thereby increasing the power generation of the solar cell.

Continuing with the above, please refer to FIG. 4A, FIG. 4B, FIG. 4C and FIG. 4D. FIG. 4B is a cross-sectional view of the structure of the third embodiment of the present invention. FIG. 4C is a cross-sectional view of the display area of the third embodiment of the present invention. FIG. 4D is a cross-sectional view of the electrical connection area of the third embodiment of the present invention. FIG. 4B, FIG. 4C and FIG. 4D are cross-sectional views of FIG. 4A of the present invention taken along the symmetry axis AA'. As shown in the figure, the structure of the third embodiment of the present invention includes: the optical substrate 1; the display area 10, which is disposed on the optical substrate 1, and the display area 10 further includes: the color filter layer 40, which is disposed on the optical substrate 1; the first solar cell; The first solar cell layer 22 is disposed in the display area 10 and on the optical substrate 1, and covers one outer side of the color filter layer 40; the third solar cell layer 26 is disposed on the optical substrate 1 and is adjacent to the first solar cell layer 22; the protective layer 19, a portion of which covers the first solar cell layer 26. The battery layer 22 and the third solar battery layer 26; the liquid crystal layer 42, which is disposed on the protective layer 19 and the color filter layer 40; the sealing layer 44, which is adjacent to the liquid crystal layer 42 and disposed on the protective layer 19; the polarizing layer 50, which is disposed corresponding to the display area 10 and is located on the optical substrate 1 The electrical connection area 20 is disposed adjacent to the display area 10 and disposed on the optical substrate 1, and the electrical connection area 20 further includes: the second solar cell layer 24, which is disposed on the optical substrate 1 and adjacent to the third solar cell layer 26; the protective layer 19, a portion of which includes the second solar cell layer 24; the flexible circuit board 14, which is disposed on the optical substrate 1; the array element 46, which is disposed on the liquid crystal layer 42 and the sealing layer 44; the array substrate 48, which is disposed on the array element 46. As shown in the figure, the difference between the third embodiment of the present invention and the first embodiment of the present invention is that the third embodiment of the present invention In the embodiment, the first solar cell layer 22, the third solar cell layer 26 and the second solar cell layer 24 are connected in parallel or in series, instead of being connected through the first wiring 15 and the second wiring 16 as in the first embodiment of the present invention, wherein the light incident side is below the polarizing layer 50, and the third solar cell layer 2 6 is sandwiched between the optical substrate 1 and the sealing layer 44, the third solar cell layer 26 is disposed in the orthographic projection area of the sealing layer 44, the third solar cell layer 26 is electrically connected to the first solar cell layer 22 and the second solar cell layer 24, and the protective layer 19 partially encloses the third solar cell layer 26.

In the third embodiment of the present invention, the first solar cell layer 22, the second solar cell layer 24 and the third solar cell layer 26 can be an integrally formed solar cell.

In the third embodiment of the present invention, the first solar cell layer 22 and the second solar cell layer 24 can be electrically connected to each other through wiring, and the second solar cell layer 24 and the third solar cell layer 26 can also be electrically connected to each other through wiring.

Continuing from the above, the third embodiment of the present invention, by adding a second solar cell 24 in the electrical connection area 20, can provide a better power generation environment for the solar cell through a larger light receiving area compared to the prior art, so that the solar cell can provide more environmentally friendly energy. In addition, the structure of the third embodiment of the present invention sets the second solar cell layer 24 in the electrical connection area 20 and sets the third solar cell layer 24 in the display area 10. Since the polarizing layer 50 is not located at a position that covers the second solar cell layer 24 and the third solar cell layer 26, the polarizing layer 50 will not be affected by the polarizing layer 50, thereby reducing the power generation efficiency of the second solar cell layer 24 and the third solar cell layer 26, and can allow the light to directly irradiate the second solar cell layer 24 and the third solar cell layer 26 to improve the power generation efficiency.

Next, refer to FIG. 5, which is a schematic diagram of the structure of the fourth embodiment of the present invention. As shown in the figure, the structure includes: the optical substrate 1, which includes: the display area 10; the first solar cell layer 22, which is arranged in the display area 10 and on the optical substrate 1, and covers one outer side of the color filter layer 40; the electrical connection area 20, which is adjacent to the display area 10 and arranged above the optical substrate 1, the flexible circuit board 14, which is arranged in the electrical connection area 20 and on the optical substrate 1; the second solar cell layer 24, which is arranged in the electrical connection area 20 and on the optical substrate 1, and adjacent to the first solar cell layer 22; the third The first wiring 17 is used to connect the second solar cell layer 24 and the flexible circuit board 14, and transmit the electric energy generated by the second solar cell layer 24 to the flexible circuit board 14; and the second wiring 18 is used to connect the second solar cell layer 24 and the flexible circuit board 14, and transmit the electric energy generated by the second solar cell layer 24 to the flexible circuit board 14. The generated electric energy is transmitted to the flexible circuit board 14, wherein the first solar cell layer 22 is connected to the second solar cell layer 24 in series or in parallel, as shown in the figure, which is different from the second embodiment of the present invention in that the third trace 17 and the fourth trace 18 horizontally connect the second solar cell layer 24 and the flexible circuit board 14.

The reasons for setting the first gap D1 and the second gap D2 in the fourth embodiment of the present invention have been described in the first embodiment of the present invention, so they will not be repeated here.

In the fourth embodiment of the present invention, the first solar cell layer 22 and the second solar cell layer 24 can be electrically connected to each other through wiring.

Continuing from the above, the fourth embodiment of the present invention, by adding a second solar cell 24 in the electrical connection area 20, can provide a better power generation environment for the solar cell through a larger light receiving area compared to the conventional method, so that the solar cell can provide more environmentally friendly energy, and the structure of the second embodiment of the present invention is in the electrical connection area 20 The second solar cell layer 24 is set. Since the polarizing layer 50 is set at a position that does not cover the second solar cell layer 24, it will not be affected by the polarizing layer 50, thereby reducing the power generation efficiency of the second solar cell layer 24. The light can directly irradiate the second solar cell layer 24 to improve the power generation efficiency.

Next, refer to FIG. 6, which is a schematic diagram of the structure of the fifth embodiment of the present invention. As shown in the figure, the structure includes: the optical substrate 1, which includes: the display area 10; the first solar cell layer 22, which is arranged in the display area 10 and on the optical substrate 1, and covers one outer side of the color filter layer 40; the electrical connection area 20, which is adjacent to the display area 10 and arranged above the optical substrate 1, the flexible circuit board 14, which is arranged in the electrical connection area 20 and on the optical substrate 1; the second solar cell layer 24, which is arranged in the electrical connection area 20 and on the optical substrate 1, and adjacent to the first The solar cell layer 22; the third trace 17, which is used to connect the second solar cell layer 24 and the flexible circuit board 14, and transmit the electric energy generated by the second solar cell layer 24 to the flexible circuit board 14; and the fourth trace 18, which is used to connect the second solar cell layer 24 and the flexible circuit board 14, and transmit the electric energy generated by the second solar cell layer 24 to the flexible circuit board 14. As shown in the figure, the difference between the second embodiment of the present invention and the third trace 17 and the fourth trace 18 is that the second solar cell layer 24 and the flexible circuit board 14 are horizontally connected and directly connected at the same time.

The reasons for setting the first gap D1 and the second gap D2 in the fifth embodiment of the present invention have been described in the first embodiment of the present invention, so they will not be repeated here.

In the fifth embodiment of the present invention, the first solar cell layer 22 and the second solar cell layer 24 can be electrically connected to each other through wiring.

Continuing from the above, the fifth embodiment of the present invention, by adding a second solar cell 24 in the electrical connection area 20, can provide a better power generation environment for the solar cell through a larger light receiving area compared to the prior art, so that the solar cell can provide more environmentally friendly energy. In addition, the structure of the second embodiment of the present invention sets the second solar cell layer 24 in the electrical connection area 20. Since the position where the polarizing layer 50 is set does not cover the second solar cell layer 24, it will not be affected by the polarizing layer 50, thereby reducing the power generation efficiency of the second solar cell layer 24, and can allow light to directly irradiate the second solar cell layer 24 to improve the power generation efficiency.

Next, refer to FIG. 7, which is a schematic diagram of the structure of the sixth embodiment of the present invention. As shown in the figure, the structure includes: the optical substrate 1, which includes: the display area 10; the first solar cell layer 22, which is arranged in the display area 10 and on the optical substrate 1, and covers an outer side of the color filter layer 40; the third wiring 17, which is used to connect the first solar cell layer 22 and the flexible circuit board 14, and transmit the power generated by the first solar cell layer 22 to the flexible circuit board 1 4; the fourth wiring 18 is used to connect the first solar cell layer 22 and the flexible circuit board 14, and transmit the electric energy generated by the first solar cell layer 22 to the flexible circuit board 14; the electrical connection area 20 is adjacent to the display area 10 and is arranged above the optical substrate 1, and the flexible circuit board 14 is arranged in the electrical connection area 20 and on the optical substrate 1; the second solar cell layer 24 is arranged in the electrical connection area 20 and on the optical substrate 1, and adjacent to the first solar cell layer 22; the third wiring 17 is used to connect the second solar cell layer 24 and the flexible circuit board 14, and transmit the power generated by the second solar cell layer 24 to the flexible circuit board 14; and the fourth wiring 18 is used to connect the second solar cell layer 24 and the flexible circuit board 14, and transmit the power generated by the second solar cell layer 24 to the flexible circuit board 14. As shown in the figure, the sixth embodiment of the present invention is the same as the first embodiment of the present invention. The difference between the two embodiments is that the third wiring 17 and the fourth wiring 18 are electrically connected to the first solar cell layer 22, so that the electric energy generated by the first solar cell layer 22 does not need to be transmitted to the flexible circuit board 14 through the second solar cell layer 24 in series or parallel through the first solar cell layer 22, but can be directly transmitted to the flexible circuit board 14 through the third wiring 17 and the fourth wiring 18, so as to reduce the power loss of the transmitted electric energy and indirectly increase the power supply of the solar cell.

The reasons for setting the first gap D1 and the second gap D2 in the sixth embodiment of the present invention have been described in the first embodiment of the present invention, so they will not be repeated here.

Continuing from the above, the sixth embodiment of the present invention, by adding a second solar cell layer 24 in the electrical connection area 20, can provide a better power generation environment for the solar cell through a larger light receiving area compared to the prior art, so that the solar cell can provide more environmentally friendly energy. In addition, the structure of the second embodiment of the present invention sets the second solar cell layer 24 in the electrical connection area 20. Since the position where the polarizing layer 50 is set does not cover the second solar cell layer 24, it will not be affected by the polarizing layer 50, thereby reducing the power generation efficiency of the second solar cell layer 24. The light can be directly irradiated to the second solar cell layer 24 to improve the power generation efficiency. The third trace 17 and the fourth trace 18 are electrically connected to the first solar cell layer 22, so that the electric energy generated by the first solar cell layer 22 does not need to be transmitted to the flexible circuit board 14 through the second solar cell layer 24 in series or parallel through the first solar cell layer 22, but can be directly transmitted to the flexible circuit board 14 through the third trace 17 and the fourth trace 18, so as to reduce the power loss of the transmitted electric energy and indirectly increase the power supply of the solar cell.

Next, refer to FIG. 8, which is a schematic diagram of the structure of the seventh embodiment of the present invention. As shown in the figure, the structure includes: the optical substrate 1, which includes: the display area 10; the first solar cell layer 22, which is arranged in the display area 10 and on the optical substrate 1, and covers an outer side of the color filter layer 40; the third wiring 17, which is used to connect the first solar cell layer 22 and the flexible circuit board 14, and transmit the power generated by the first solar cell layer 22 to the flexible circuit board 14; the fourth wiring 18, which is used to connect the first solar cell layer 22 and the flexible circuit board 14. The first solar cell layer 22 and the flexible circuit board 14 are connected to each other, and the electric energy generated by the first solar cell layer 22 is transmitted to the flexible circuit board 14; the electrical connection area 20 is adjacent to the display area 10 and is disposed above the optical substrate 1, and the flexible circuit board 14 is disposed in the electrical connection area 20 and on the optical substrate 1; the second solar cell layer 24 is disposed in the electrical connection area 20 and on the optical substrate 1, and is adjacent to the first solar cell layer 22; the third wiring 17 is used The seventh embodiment of the present invention is different from the second embodiment of the present invention in that the third trace 17 and the fourth trace 18 are electrically connected to the first solar cell layer 24 and the flexible circuit board 14, and the power generated by the second solar cell layer 24 is transmitted to the flexible circuit board 14; and the fourth trace 18 is used to connect the second solar cell layer 24 and the flexible circuit board 14, and the power generated by the second solar cell layer 24 is transmitted to the flexible circuit board 14. As shown in the figure, the seventh embodiment of the present invention is different from the second embodiment of the present invention in that the third trace 17 and the fourth trace 18 are electrically connected to the first solar cell layer 24 and the flexible circuit board 14. Layer 22, so that the electric energy generated by the first solar cell layer 22 does not need to be transmitted to the flexible circuit board 14 through the second solar cell layer 24 in series through the first solar cell layer 22, but can be directly transmitted to the flexible circuit board 14 through the third wiring 17 and the fourth wiring 18, so as to reduce the power loss of the transmitted electric energy and indirectly increase the power supply of the solar cell. The difference between the third wiring 17 and the fourth wiring 18 and the sixth embodiment of the present invention is that the third wiring 17 and the fourth wiring 18 horizontally connect the second solar cell layer 24 and the flexible circuit board 14.

The reasons for setting the first gap D1 and the second gap D2 in the seventh embodiment of the present invention have been described in the first embodiment of the present invention, so they will not be repeated here.

Continuing from the above, the seventh embodiment of the present invention, by adding a second solar cell layer 24 in the electrical connection area 20, can provide a better power generation environment for the solar cell through a larger light receiving area compared to the prior art, so that the solar cell can provide more environmentally friendly energy. In addition, the structure of the second embodiment of the present invention sets the second solar cell layer 24 in the electrical connection area 20. Since the position where the polarizing layer 50 is set does not cover the second solar cell layer 24, it will not be affected by the polarizing layer 50, thereby reducing the power generation efficiency of the second solar cell layer 24. , which can allow light to directly illuminate the second solar cell layer 24 to improve power generation efficiency, and by electrically connecting the third trace 17 and the fourth trace 18 to the first solar cell layer 22, the electric energy generated by the first solar cell layer 22 does not need to be transmitted to the flexible circuit board 14 through the second solar cell layer 24 in series or parallel through the first solar cell layer 22, but can be directly transmitted to the flexible circuit board 14 through the third trace 17 and the fourth trace 18, thereby reducing the power loss of the transmitted electric energy and indirectly increasing the power supply of the solar cell.

Next, refer to FIG. 9, which is a schematic diagram of the structure of the eighth embodiment of the present invention. As shown in the figure, the structure includes: the optical substrate 1, which includes: the display area 10; the first solar cell layer 22, which is arranged in the display area 10 and on the optical substrate 1, and covers an outer side of the color filter layer 40; the third wiring 17, which is used to connect the first solar cell layer 22 and the flexible circuit board 14, and transmit the power generated by the first solar cell layer 22 to the flexible circuit board 14; the fourth wiring 18, which is used to connect The first solar cell layer 22 and the flexible circuit board 14 are connected to each other, and the electric energy generated by the first solar cell layer 22 is transmitted to the flexible circuit board 14; the electrical connection area 20 is adjacent to the display area 10 and is disposed above the optical substrate 1, and the flexible circuit board 14 is disposed in the electrical connection area 20 and on the optical substrate 1; the second solar cell layer 24 is disposed in the electrical connection area 20 and on the optical substrate 1, and is adjacent to the first solar cell layer 22; the third wiring 17 is used to connect the first solar cell layer 22 to the flexible circuit board 14 ... The second solar cell layer 24 and the flexible circuit board 14 are connected to each other, and the electric energy generated by the second solar cell layer 24 is transmitted to the flexible circuit board 14; and the fourth wiring 18 is used to connect the second solar cell layer 24 and the flexible circuit board 14, and transmit the electric energy generated by the second solar cell layer 24 to the flexible circuit board 14, as shown in the figure. The eighth embodiment of the present invention is different from the second embodiment of the present invention in that the third wiring 17 and the fourth wiring 18 are electrically connected to the first solar cell layer 22, so that The electric energy generated by the first solar cell layer 22 does not need to be transmitted to the flexible circuit board 14 through the second solar cell layer 24 in series through the first solar cell layer 22, but can be directly transmitted to the flexible circuit board 14 through the third wiring 17 and the fourth wiring 18, so as to reduce the power loss of the transmitted electric energy and indirectly increase the power supply of the solar cell. The difference between the first solar cell layer 22 and the sixth embodiment of the present invention is that the third wiring 17 and the fourth wiring 18 are simultaneously horizontally connected and directly connected to the second solar cell layer 24 and the flexible circuit board 14.

The reasons for setting the first gap D1 and the second gap D2 in the eighth embodiment of the present invention have been described in the first embodiment of the present invention, so they will not be repeated here.

Continuing from the above, the eighth embodiment of the present invention, by adding a second solar cell layer 24 in the electrical connection area 20, can provide a better power generation environment for the solar cell through a larger light receiving area compared to the prior art, so that the solar cell can provide more environmentally friendly energy. In addition, the structure of the second embodiment of the present invention sets the second solar cell layer 24 in the electrical connection area 20. Since the position where the polarizing layer 50 is set does not cover the second solar cell layer 24, it will not be affected by the polarizing layer 50, thereby reducing the power generation efficiency of the second solar cell layer 24. The light can be directly irradiated to the second solar cell layer 24 to improve the power generation efficiency. The third trace 17 and the fourth trace 18 are electrically connected to the first solar cell layer 22, so that the electric energy generated by the first solar cell layer 22 does not need to be transmitted to the flexible circuit board 14 through the second solar cell layer 24 in series or parallel through the first solar cell layer 22, but can be directly transmitted to the flexible circuit board 14 through the third trace 17 and the fourth trace 18, so as to reduce the power loss of the transmitted electric energy and indirectly increase the power supply of the solar cell.

In the above embodiment, the lead vertical direction is the axial direction from the flexible circuit board 14 to the first solar cell layer 22, and the horizontal direction is the axial direction perpendicular to the lead vertical direction.

Next, refer to FIG. 7 and FIG. 10A. FIG. 10A is a schematic diagram of the structure of the first solar cell layer of the present invention. As shown in the figure, the first solar cell layer 22 includes: a first lower electrode layer 222, which is disposed above the optical substrate 1; a first photoelectric conversion layer 224, which is disposed above the first lower electrode layer 222; a first upper electrode layer 226, which is disposed above the first photoelectric conversion layer 224; and a first transmission electrode layer 228, which is disposed above the first upper electrode layer 226, and the first transmission electrode layer 228 is coupled to the third wiring 17 and the fourth wiring 18.

Next, refer to FIG. 7 and FIG. 10B. FIG. 10B is a schematic diagram of the structure of the second solar cell layer of the present invention. As shown in the figure, the second solar cell layer 24 includes: a second lower electrode layer 242, which is disposed above the optical substrate 1; a second photoelectric conversion layer 244, which is disposed above the second lower electrode layer 242; a second upper electrode layer 246, which is disposed above the second photoelectric conversion layer 244; and a second transmission electrode layer 248, which is disposed above the second upper electrode layer 246, and the second transmission electrode layer 248 is coupled to the third wiring 17 and the fourth wiring 18.

Continuing with the above, referring to FIG. 10A and FIG. 10B again, the structure of the third solar cell layer 26 of the present invention is the same as that of the first solar cell layer 22 and the second solar cell layer 24, and will not be described in detail here.

Next, refer to Figure 2A and Figure 11A. Figure 11A is a structural diagram of the flexible circuit board of the present invention. The flexible circuit board 14 further includes: a charging control circuit 142, the charging control circuit 142 is coupled to the third wiring 17 and the fourth wiring 18; a conversion circuit 144, which is coupled to the charging control circuit 142; a storage element 146, which is coupled to the conversion circuit 144, wherein the charging control circuit 142 transmits the electric energy of the first solar cell layer 22 and the second solar cell layer 24 to the conversion circuit 144, and the conversion circuit 144 converts the voltage of the electric energy and outputs the electric energy to the storage element 146 for storage.

Continuing from the above, the flexible circuit board of the present invention can also achieve the same effect through another connection relationship. Referring to FIG. 2A and FIG. 11B, FIG. 11B is another structural diagram of the flexible circuit board of the present invention. The flexible circuit board 14 further includes: the conversion circuit 144, the conversion circuit 144 is coupled to the third wiring 17 and the fourth wiring 18; the charging control circuit 142, It is coupled to the conversion circuit 144; the storage element 146 is coupled to the charging control circuit 142, wherein the electric energy of the first solar cell layer 22 and the second solar cell layer 24 is transmitted to the conversion circuit 144 to convert the voltage of the electric energy and output the electric energy to the charging control circuit 142, and the charging control circuit 142 outputs the electric energy to the storage element 146 for storage.

Continuing from the above, the flexible circuit board of the present invention can also achieve the same effect through another connection relationship. Referring to FIG. 2A and FIG. 11C, FIG. 11C is another structural diagram of the flexible circuit board of the present invention. The flexible circuit board 14 further includes: the charging control circuit 142, the charging control circuit 142 is coupled to the third wiring 17 and the fourth wiring 18; the storage element 146, which is coupled to the charging control circuit The conversion circuit 144 is coupled to the storage element 146, wherein the electric energy of the first solar cell layer 22 and the second solar cell layer 24 is transmitted to the charging control circuit 142, and the charging control circuit 142 outputs the electric energy to the storage element 146 for storage. When the power demand is generated, the conversion circuit 144 receives the electric energy from the storage element 146 and converts the voltage of the electric energy for output.

In the above-described embodiment, the present invention manufactures a solar cell structure for a display panel, which connects the first solar cell layer 22 and the second solar cell layer 24 through the third wiring 17 and the fourth wiring 18, so that the first solar cell layer 22 and the second solar cell layer 24 do not need to transmit electric energy to the flexible circuit board 14 in series or in parallel, but instead transmit electric energy to the flexible circuit board 14 through the third wiring 17 and the fourth wiring 18, thereby reducing The second solar cell layer 24 is added to the electrical connection area 20, so that the second solar cell layer 24 will no longer affect the display of the display area 10, and more light-receiving area is increased, so that the solar cell can generate more renewable energy, which is then supplied to the flexible circuit board 14. Since the added second solar cell layer 24 is not within the coverage of the polarizing layer 50, the received light will not be affected by the polarizing layer 50, thereby improving the power generation efficiency.

Therefore, this invention is novel, progressive and can be used in the industry. It should undoubtedly meet the patent application requirements of the Patent Law of our country. Therefore, I have filed an invention patent application in accordance with the law. I hope that the Bureau will approve the patent as soon as possible. I am very grateful.

However, the above is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes and modifications made according to the shape, structure, features and spirit described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

1: Optical substrate

10: Display area

12: Solar cell layer

14: Flexible circuit board

142: Charging control circuit

144:Conversion circuit

146: Energy storage element

15: First route

16: Second route

17: The third route

18: The fourth route

19: Protective layer

20: Electrical connection area

22: First solar cell layer

222: First lower electrode layer

224: First photoelectric conversion layer

226: first upper electrode layer

228: First transmission electrode layer

24: Second solar cell layer

242: Second lower electrode layer

244: Second photoelectric conversion layer

246: Second upper electrode layer

248: Second transmission electrode layer

26: Third solar cell layer

40: Color filter layer

42: Liquid crystal layer

44: Sealing layer

46: Array element

48: Array substrate

50: Polarizing layer

D1: First gap

D2: Second gap

FIG. 1 is a schematic diagram of a solar cell structure of a known display panel; FIG. 2A is a schematic diagram of a structure of a first embodiment of the present invention; FIG. 2B is a cross-sectional diagram of a structure of a first embodiment of the present invention; FIG. 2C is a cross-sectional diagram of a display area of the first embodiment of the present invention; FIG. 2D is a cross-sectional diagram of an electrical connection area of the first embodiment of the present invention; FIG. 3A is a cross-sectional diagram of a structure of a second embodiment of the present invention. 3B: a structural schematic diagram of the second embodiment of the present invention; 3C: a cross-sectional diagram of the display area of the second embodiment of the present invention; 3D: a cross-sectional diagram of the electrical connection area of the second embodiment of the present invention; 4A: a structural schematic diagram of the third embodiment of the present invention; 4B: a cross-sectional diagram of the third embodiment of the present invention; 4C: a cross-sectional diagram of the electrical connection area of the second embodiment of the present invention; FIG. 4D is a cross-sectional view of the display area of the third embodiment of the present invention; FIG. 5 is a schematic structural diagram of the fourth embodiment of the present invention; FIG. 6 is a schematic structural diagram of the fifth embodiment of the present invention; FIG. 7 is a schematic structural diagram of the sixth embodiment of the present invention; FIG. 8 is a schematic structural diagram of the seventh embodiment of the present invention; FIG. 9 is a schematic structural diagram of the seventh embodiment of the present invention; Schematic diagram of the structure of the eighth embodiment; Figure 10A: It is a schematic diagram of the structure of the first solar cell layer of the present invention; Figure 10B: It is a schematic diagram of the structure of the second solar cell layer of the present invention; Figure 11A: It is a structural diagram of the flexible circuit board of the present invention; Figure 11B: It is another structural diagram of the flexible circuit board of the present invention; and Figure 11C: It is another structural diagram of the flexible circuit board of the present invention.

1: Optical substrate

10: Display area

14: Flexible circuit board

15: First route

16: Second route

17: The third route

18: The fourth route

20: Electrical connection area

22: First solar cell layer

24: Second solar cell layer

D1: First gap

D2: Second gap

Claims (11)

A solar cell structure for a display panel includes: an optical substrate; a display area disposed on the optical substrate, including: a color filter layer disposed on the optical substrate; a first solar cell layer, which surrounds an outer side of the color filter layer; a protective layer, which surrounds an outer side of the first solar cell layer. , and is disposed on the optical substrate; a liquid crystal layer, which is disposed above the color filter layer and the protective layer; and a sealing layer, which is disposed above the protective layer, and the sealing layer is adjacent to the liquid crystal layer; a polarizing layer, which is disposed corresponding to the display area and is located below the optical substrate; an electrical connection area, which is adjacent to the display area and disposed The optical substrate includes: a flexible circuit board disposed on the optical substrate; and a second solar cell layer disposed on the optical substrate. The second solar cell layer is disposed between an orthographic projection area of the sealing layer and the flexible circuit board. The second solar cell layer is electrically connected to the first solar cell layer and the A flexible circuit board, the protective layer wraps an outer side of the second solar cell layer; an array element is arranged above the liquid crystal layer and the sealing layer; and an array substrate is arranged above the array element; Wherein, the flexible circuit board is used to transmit the electric energy generated by the first solar cell layer and the second solar cell layer when irradiated with light. A solar cell structure for a display panel as described in claim 1, wherein the first solar cell layer is electrically connected to the second solar cell layer via a first wiring and a second wiring. The solar cell structure of the display panel as described in claim 1, wherein the first solar cell layer and the second solar cell layer are integrally formed. The solar cell structure of the display panel as described in claim 1 further comprises: a third solar cell layer, which is sandwiched between the optical substrate and the sealing layer, the third solar cell layer is arranged in the orthographic projection area of the sealing layer, the third solar cell layer is electrically connected to the first solar cell layer and the second solar cell layer, and the protective layer covers an outer side of the third solar cell layer. The solar cell structure of the display panel as described in claim 4, wherein the first solar cell layer, the second solar cell layer and the third solar cell layer are formed in one piece. The solar cell structure of the display panel as described in claim 1, wherein the second solar cell layer is at least 0.1 mm away from the flexible circuit board. A solar cell structure for a display panel as described in claim 1, wherein the second solar cell layer is electrically connected to the flexible circuit board via a third trace and a fourth trace. The solar cell structure of the display panel as described in claim 7, wherein the second solar cell layer further comprises: a second lower electrode layer, which is disposed above the optical substrate; a second photoelectric conversion layer, which is disposed above the second lower electrode layer; a second upper electrode layer, which is disposed above the second photoelectric conversion layer; and a second transmission electrode layer, which is disposed above the second upper electrode layer, and the second transmission electrode layer is coupled to the third wiring and the fourth wiring. A solar cell structure for a display panel as described in claim 7, wherein the first solar cell layer is electrically connected to the flexible circuit board through the third trace and the fourth trace. The solar cell structure of the display panel as described in claim 9, wherein the first solar cell layer further comprises: a first lower electrode layer, which is disposed above the optical substrate; a first photoelectric conversion layer, which is disposed above the first lower electrode layer; a first upper electrode layer, which is disposed above the first photoelectric conversion layer; and a first transmission electrode layer, which is disposed above the first upper electrode layer, and the first transmission electrode layer is coupled to the third wiring and the fourth wiring. The solar cell structure of the display panel as described in claim 7 or 9, the flexible circuit board includes: a charging control circuit, which is used to transmit the electric energy generated by the first solar cell layer and the second solar cell layer to a storage element; the storage element is coupled to the charging control circuit, and the storage element is used to store the electric energy generated by the first solar cell layer and the second solar cell layer; and a conversion circuit, which is coupled to the charging control circuit and is used to convert the voltage of the electric energy generated by the first solar cell layer and the second solar cell layer.

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