Self-powered display device

Abstract

The invention provides a self-powered display device. The self-powered display device comprises a light-transmitting panel and a photoelectric conversion module, the light-transmitting panel comprises a display area for a light ray to penetrate through. The photoelectric conversion module is electrically connected with the light-transmitting panel. The photoelectric conversion module comprises a power generation area used for absorbing light rays penetrating through the display area, and the power generation area converts the light rays into electric energy so as to provide the electric energy for the light-transmitting panel. The light-transmitting panel and the photoelectric conversion module are arranged at intervals, and the projection area of the display area in the power generation area is larger than the area of the power generation area. Therefore, the shading phenomenon of the light-transmitting panel can be avoided, and the power generation efficiency of the photoelectric conversion module can be improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and more particularly to a self-powered display device. Background Art

[0002] One of the characteristics of a transmissive reflective panel (such as a cholesterol liquid crystal panel) is that it not only reflects ambient light to provide a picture, but also allows part of the ambient light to penetrate to the bottom. By combining a solar device at the bottom of the panel, the ambient light can be fully utilized to achieve self-generating function. However, as the sunlight changes, such as from morning to dusk, the incident angle of the ambient light will be different, and the effective power generation area that penetrates the cholesterol liquid crystal panel to the solar device will change accordingly. Based on the change in sunlight, the radiation amount of ambient light will also be different, and at the same time only part of the energy will penetrate the cholesterol liquid crystal panel to the solar device, so the effective energy that can be used will be lower.

[0003] When the sun's elevation angle in the sky changes, the refraction angle after entering the cholesterol liquid crystal panel also changes. Before light energy reaches the solar device, it will pass through a variety of media (such as air, glass, plastic, optical glue or panel process materials), and media with different refractive indices will also affect the optical path. As the optical path changes, the equivalent incident energy will also change. Although the larger the area of ​​the solar device, the larger the area that can collect energy. However, if there is local shading, the shaded area will still be unable to generate electricity effectively, resulting in a decrease in the overall power generation of the solar device.

[0004] In view of this, developing a self-powered display device that can take into account changes in ambient light and ensure that the effective power generation area is not affected has become an urgent problem that the relevant industry players want to solve. Summary of the invention

[0005] Therefore, the purpose of the present disclosure is to provide a self-powered display device, which avoids shading caused by ambient light and optical path changes by configuring the projection area of ​​the display area on the power generation area to be larger than the area of ​​the power generation area, thereby improving power generation efficiency. In addition, based on the consideration of the heat dissipation problem between the light-transmitting panel and the photoelectric conversion module, the light-transmitting panel and the photoelectric conversion module must maintain a spacing distance to promote heat convection to achieve the purpose of thermal management, and at the same time reduce the thermal interference between the light-transmitting panel and the photoelectric conversion module.

[0006] According to one embodiment of the present disclosure, a self-powered display device is provided, which includes a light-transmitting panel and a photoelectric conversion module. The light-transmitting panel includes a display area for light to pass through. The photoelectric conversion module is electrically connected to the light-transmitting panel, wherein the photoelectric conversion module includes a power generation area for absorbing light that passes through the display area, and the power generation area converts the light into electric energy to provide electric energy to the light-transmitting panel. The projection area of ​​the display area on the power generation area is larger than the area of ​​the power generation area.

[0007] Other examples of the aforementioned embodiment are as follows: the ratio of the area of ​​the aforementioned power generation region to the area of ​​the display region is between 75% and 99%.

[0008] Other examples of the aforementioned implementation are as follows: the aforementioned light-transmitting panel and the photoelectric conversion module are disposed at intervals.

[0009] Other examples of the aforementioned implementation are as follows: there is a spacing distance between the aforementioned light-transmitting panel and the photoelectric conversion module, and the spacing distance is less than or equal to 5 centimeters.

[0010] Other examples of the aforementioned embodiment are as follows: the aforementioned light-transmitting panel is disposed adjacent to the photoelectric conversion module.

[0011] Other examples of the aforementioned embodiment are as follows: the aforementioned light-transmitting panel is a cholesteric liquid crystal panel, a semi-transmissive and semi-reflective liquid crystal panel, a transparent organic light-emitting diode panel or a transparent light-emitting diode panel.

[0012] Other examples of the aforementioned implementation are as follows: the aforementioned photoelectric conversion module is a silicon crystalline solar cell, a thin film solar cell, an organic solar cell, a perovskite solar cell or a dye-sensitized solar cell.

[0013] Other embodiments of the aforementioned embodiment are as follows: the aforementioned light-transmitting panel and the photoelectric conversion module are disposed in a housing, and the housing has an opening exposing the display area of ​​the light-transmitting panel.

[0014] According to another embodiment of the present disclosure, a self-powered display device is provided, which includes a housing, a light-transmitting panel, and a photoelectric conversion module. The housing forms a housing space. The light-transmitting panel is disposed in the housing space, wherein the light-transmitting panel includes a display area for light to penetrate. The photoelectric conversion module is disposed in the housing space, wherein the photoelectric conversion module is electrically connected to the light-transmitting panel and includes a power generation area for absorbing light penetrating the display area, and the power generation area converts the light into electric energy to provide electric energy to the light-transmitting panel. The light-transmitting panel and the photoelectric conversion module are spaced apart.

[0015] Other examples of the aforementioned implementation are as follows: there is a spacing distance between the aforementioned light-transmitting panel and the photoelectric conversion module, and the spacing distance is less than or equal to 5 centimeters.

[0016] Other examples of the aforementioned embodiment are as follows: the area of ​​the aforementioned power generation region is smaller than the area of ​​the display region.

[0017] Other examples of the aforementioned embodiment are as follows: the ratio of the area of ​​the aforementioned power generation region to the area of ​​the display region is between 75% and 99%. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the above and other objects, features, advantages and embodiments of the present disclosure more clearly understood, the accompanying drawings are described as follows:

[0019] Figure 1 is a three-dimensional perspective view of a self-powered display device according to a first embodiment of the present disclosure;

[0020] Figure 2 It is shown Figure 1 An exploded schematic diagram of a self-powered display device;

[0021] Figure 3 is a curve comparison diagram showing the visible area size and the area ratio of the power generation area to the display area of ​​the light-transmitting panel disclosed in the present invention;

[0022] Figure 4 It is shown Figure 1 A schematic cross-sectional view of the self-powered display device along the tangent line AA;

[0023] Figure 5 is a curve comparison diagram showing the spacing distance between the light-transmitting panel and the photoelectric conversion module and the area ratio of the power generation area to the display area of ​​the present disclosure; and

[0024] Figure 6 FIG. 4 is a cross-sectional schematic diagram illustrating a self-powered display device according to a second embodiment of the present disclosure.

[0025] The reference numerals are described as follows:

[0026] 100, 200: Self-powered display device

[0027] 110, 210: Shell

[0028] 111: Opening

[0029] 120, 220: Translucent panel

[0030] 121: Display area

[0031] 130, 230: Photoelectric conversion module

[0032] 131: Power generation area

[0033] d: spacing distance

[0034] L: Light

[0035] S: Accommodation space DETAILED DESCRIPTION

[0036] The following will describe multiple embodiments of the present disclosure with reference to the accompanying drawings. For the sake of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present disclosure. That is, in some embodiments of the present disclosure, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and elements will be depicted in a simple schematic manner in the drawings; and repeated elements may be represented by the same number.

[0037] In addition, in this article, when a certain element (or unit or module, etc.) is "connected / linked" to another element, it may refer to that the element is directly connected / linked to another element, or it may refer to that a certain element is indirectly connected / linked to another element, that is, there are other elements between the element and the other element. When it is explicitly stated that a certain element is "directly connected / linked" to another element, it means that there are no other elements between the element and the other element. The terms first, second, third, etc. are only used to describe different elements, and there is no restriction on the elements themselves. Therefore, the first element can also be renamed as the second element. Moreover, the combination of elements / units / circuits in this article is not a generally known, conventional or conventional combination in this field. Whether the elements / units / circuits themselves are conventional cannot be used to determine whether their combination relationship is easy to be easily completed by ordinary knowledgeable people in the technical field.

[0038] See also Figure 1 and Figure 2 ,in Figure 1 is a three-dimensional perspective view of a self-powered display device according to a first embodiment of the present disclosure; and Figure 2 It is shown Figure 1The self-powered display device 100 includes a housing 110, a light-transmitting panel 120 and a photoelectric conversion module 130. The light-transmitting panel 120 and the photoelectric conversion module 130 are both disposed in the housing 110. The light-transmitting panel 120 includes a display area 121, which is used to reflect a light L to provide a picture and also allows part of the light L to pass through. The photoelectric conversion module 130 is electrically connected to the light-transmitting panel 120 via a wire (not shown separately) installed in the housing 110, and includes a power generation area 131 for absorbing the light L that passes through the display area 121. The power generation area 131 is located in the display area 121 and converts the light L into electrical energy, and at the same time provides electrical energy to the light-transmitting panel 120 through the wire for displaying the picture, so that the self-powered display device 100 has a self-powered function. The projection area of ​​the display area 121 on the power generation area 131 is larger than the area of ​​the power generation area 131. Thus, the self-powered display device 100 of the present disclosure can avoid shading of the light-transmitting panel 120 , thereby improving the power generation efficiency of the photoelectric conversion module 130 .

[0039] Specifically, the housing 110 may be an annular frame that forms a housing space S. The light-transmitting panel 120 and the photoelectric conversion module 130 are both disposed in the housing space S. In addition, the housing 110 has an opening 111 that exposes the display area 121 of the light-transmitting panel 120, so that the display area 121 can present the screen content through the opening 111. In other embodiments, the housing may also be divided into a front housing and a rear housing. The front housing is provided with an opening, and the display area fits the opening. The rear housing cover is disposed on the front housing to form a housing space for the light-transmitting panel and the photoelectric conversion module to be accommodated inside the housing.

[0040] The light-transmitting panel 120 may be, but is not limited to, a cholesteric liquid crystal display (ChLCD), a semi-transmissive and semi-reflective liquid crystal panel, a transparent organic light-emitting diode (OLED) panel or a transparent light-emitting diode (LED) panel, or other panels that have a display function and allow ambient light to penetrate. The photoelectric conversion module 130 may be, but is not limited to, a silicon crystalline 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 ambient light into electrical energy.

[0041] The layered structures inside the above-mentioned various panels may contain different dielectric materials, and their thicknesses are also different. The light L may be sunlight, so the change in its incident angle over time will cause a different effective power generation area that finally reaches the photoelectric conversion module 130. In response to the change in thickness and incident angle, in order to avoid the transparent panel 120 shading the photoelectric conversion module 130 and limiting the power generation, it can be concluded that the change in the horizontal optical path of the light L is less than 80% of the vertical optical penetration path of the light L in the transparent panel 120. Therefore, in the configuration of the self-powered display device 100, the area of ​​the power generation area 131 is smaller than the area of ​​the display area 121, and the ratio of the area of ​​the power generation area 131 to the area of ​​the display area 121 can be between 75% and 99%. Specifically, the area of ​​the power generation area 131 is the effective power generation area of ​​the photoelectric conversion module 130, which actually refers to the total power generation area of ​​each block with power generation function, and needs to deduct the non-power generation area (such as the insulation area, the forbidden area and the wire area), and is not purely calculated based on the size of the periphery of the photoelectric conversion module 130. The area of ​​the display area 121 is the area of ​​a display area (Active Area) of the light-transmitting panel 120.

[0042] Please continue to read Figure 3 , which is a curve comparison diagram showing the visible area size of the light-transmitting panel and the area ratio of the power generation area to the display area of ​​the present disclosure. In addition to the need to measure the change in the optical path caused by Snell's Law in geometric optics, the impact of manufacturing and assembly tolerances on the power generation area 131 must also be considered. Taking the light-transmitting panel 120 as a 28.5-inch cholesterol liquid crystal panel as an example, the area of ​​the power generation area 131 is A1, and the area of ​​the display area 121 is A2, wherein when the effective incident angle of the ambient light is 45 degrees, the following conditions can be met: 94%≤A1 / A2≤95%. As Figure 3 As shown, since the visible area size of the light-transmitting panel 120 varies due to the panel material thickness and the manufacturing and assembly process, the area ratio (A1 / A2) of the power generation area 131 and the display area 121 of the present disclosure only needs to meet the following condition: 90%≤A1 / A2≤99%.

[0043] Please continue to read Figure 4 , which shows Figure 1A schematic cross-sectional view of the self-powered display device along the tangent line AA. Considering the heat dissipation problem between the light-transmitting panel 120 and the photoelectric conversion module 130, in order to promote heat convection air to achieve the purpose of thermal management, the light-transmitting panel 120 and the photoelectric conversion module 130 are spaced apart. In addition, based on the configuration of the light-transmitting panel 120 and the photoelectric conversion module 130 being spaced apart, the present disclosure needs to further consider that after the light L penetrates the light-transmitting panel 120, its energy must pass through the air medium before reaching the photoelectric conversion module 130. Therefore, there is a spacing distance d between the light-transmitting panel 120 and the photoelectric conversion module 130, and the spacing distance d can be less than or equal to 5 cm, preferably less than or equal to 3 cm. Thus, through the configuration of the above-mentioned spacing distance d, not only can the overall thermal energy management of the self-powered display device 100 be improved and the thermal energy interference between the light-transmitting panel 120 and the photoelectric conversion module 130 be reduced, but also a higher power generation efficiency can be achieved under the tolerance of energy attenuation caused by the air medium.

[0044] Furthermore, the source of the light L is often not directly from a highly directional light source (i.e., not direct sunlight), and the light L may also be generated by scattering and reflection caused by the environment. After penetrating the light-transmitting panel 120, part of the light L is scattered by the air medium, which is similar to the scattering effect under sunlight. Therefore, it can be regarded that sunlight does not have obvious changes in light energy with the incident angle at a specific angle. Therefore, considering the energy of the light L under Snell's Law and the changes after penetrating the light-transmitting panel 120 and the scattering effect, the present disclosure uses an incident angle of 30° to 75° for a 28.5-inch cholesterol liquid crystal panel as an example, and can obtain a preferred spacing distance d of less than or equal to 3 cm, thereby maintaining better power generation efficiency.

[0045] Please continue to read Figure 5, which is a curve comparison diagram showing the spacing distance between the light-transmitting panel and the photoelectric conversion module and the area ratio of the power generation area to the display area of ​​the present disclosure. The light-transmitting panel 120 is taken as an example of a 28.5-inch, 55-inch and 85-inch cholesterol liquid crystal panel. In detail, when the area ratio is 90%, the spacing distance d should be maintained within 1 cm, but if the spacing distance d is increased, the area ratio will decrease as the optical path changes. Therefore, the area ratio of the power generation area 131 to the display area 121 of the present disclosure is 75% as the minimum acceptable range. However, based on the fact that the visible area size of the light-transmitting panel 120 varies due to the thickness of the panel material and the manufacturing and assembly process, and considering the thermal management requirements at the same time, the spacing distance d between the light-transmitting panel 120 and the photoelectric conversion module 130 is less than or equal to 5 cm, and the area ratio of the power generation area 131 to the display area 121 can be between 75% and 99%. In other embodiments, the light is not limited to sunlight. When the self-powered display device of the present disclosure is used indoors, the above optimization configuration principle is also applicable because the ambient light and the light-transmitting panel still have an incident angle relationship.

[0046] See also Figure 6 , which is a cross-sectional schematic diagram of a self-powered display device according to the second embodiment of the present disclosure. The self-powered display device 200 includes a housing 210, a light-transmitting panel 220, and a photoelectric conversion module 230. The difference from the first embodiment is that the light-transmitting panel 220 and the photoelectric conversion module 230 of the self-powered display device 200 are adjacently arranged in the housing 210. Specifically, a high-transmittance adhesive layer, such as an optical clear adhesive (OCA), may be provided between the light-transmitting panel 220 and the photoelectric conversion module 230. Since the thickness of the adhesive layer is only between tens of microns and hundreds of microns, it can be ignored, so the light-transmitting panel 220 and the photoelectric conversion module 230 are tightly fitted.

[0047] In the optical path of light from the light-transmitting panel 220 to the photoelectric conversion module 230, the light needs to pass through a variety of media (such as air, glass, plastic, optical glue or panel process materials), and the difference in the refractive index of the medium will affect the optical path. Sometimes, in order to pursue the picture quality, appropriate optical glue is used between the light-transmitting panel 220 and the photoelectric conversion module 230 to avoid interface reflection caused by the change of the refractive index of the air medium, thereby reducing the light penetration loss. In addition, the configuration conditions of the area ratio of the display area to the power generation area are the same as those in the first embodiment, so they are not repeated.

[0048] In summary, the present disclosure has the following advantages: First, it can ensure that the effective power generation area is not affected by shading, thereby maintaining better power generation efficiency. Second, by configuring a spacing distance between the light-transmitting panel and the photoelectric conversion module, in addition to achieving the purpose of heat management, it can also reduce the thermal interference between the light-transmitting panel and the photoelectric conversion module.

[0049] Although the present disclosure has been disclosed in the above implementation mode, it is not intended to limit the present disclosure. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the following claims.

Claims

1. A self-powered display device, characterized in that: Include: a light-transmitting panel, comprising a display area for light to penetrate; and a photoelectric conversion module electrically connected to the light-transmitting panel, wherein the photoelectric conversion module comprises a power generation area for absorbing the light penetrating the display area, and the power generation area converts the light into electric energy to provide the electric energy to the light-transmitting panel; The projection area of ​​the display area on the power generation area is larger than the area of ​​the power generation area.

2. The self-powered display device according to claim 1, characterized in that: The ratio of the area of ​​the power generation area to the area of ​​the display area is between 75% and 99%.

3. The self-powered display device according to claim 1, characterized in that: The light-transmitting panel and the photoelectric conversion module are spaced apart.

4. The self-powered display device according to claim 3, characterized in that: There is a spacing distance between the light-transmitting panel and the photoelectric conversion module, and the spacing distance is less than or equal to 5 centimeters.

5. The self-powered display device according to claim 1, characterized in that: The light-transmitting panel is arranged adjacent to the photoelectric conversion module.

6. The self-powered display device according to claim 1, characterized in that: The light-transmitting panel is a cholesterol liquid crystal panel, a half-transmitting and half-reflecting liquid crystal panel, a transparent organic light-emitting diode panel or a transparent light-emitting diode panel.

7. The self-powered display device according to claim 1, characterized in that: The photoelectric conversion module is a silicon crystal solar cell, a thin film solar cell, an organic solar cell, a perovskite solar cell or a dye-sensitized solar cell.

8. The self-powered display device according to claim 1, characterized in that: The light-transmitting panel and the photoelectric conversion module are arranged in a shell, and the shell has an opening exposing the display area of ​​the light-transmitting panel.

9. A self-powered display device, characterized in that: Include: A housing, forming a containing space; A light-transmitting panel is disposed in the accommodating space, wherein the light-transmitting panel includes a display area for light to penetrate; as well as a photoelectric conversion module disposed in the accommodation space, wherein the photoelectric conversion module is electrically connected to the light-transmitting panel and comprises a power generation area for absorbing the light penetrating the display area, and the power generation area converts the light into electric energy to provide the electric energy to the light-transmitting panel; Wherein, the light-transmitting panel and the photoelectric conversion module are arranged at intervals.

10. The self-powered display device according to claim 9, characterized in that: There is a spacing distance between the light-transmitting panel and the photoelectric conversion module, and the spacing distance is less than or equal to 5 centimeters.

11. The self-powered display device according to claim 9, characterized in that: The area of ​​the power generation region is smaller than the area of ​​the display region.

12. The self-powered display device according to claim 11, characterized in that: The ratio of the area of ​​the power generation area to the area of ​​the display area is between 75% and 99%.

Images