Self-powered display device

Abstract

The invention provides a self-powered display device which comprises a display module and a power module. The display module is a cholesterol liquid crystal display module, the electric power module is a solar cell module, the display module allows light to enter the electric power module from the front side, and the electric power module generates electric power after receiving the light so as to provide energy needed when the display module displays pictures. The power module is provided with a plurality of active surfaces and a plurality of non-active surfaces arranged among the active surfaces, when the width of the non-active surfaces is smaller than or equal to 50 micrometers, human eyes can hardly recognize the width of the non-active surfaces, and in addition, shielding layers can be arranged on the non-active surfaces. Therefore, the visual color difference (delta E) between the inactive surface and the active surface does not exceed 10 color difference units, so that the picture is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of self-powered display devices, and in particular to a self-powered display device that improves picture color difference or forms a narrower visual area through a shielding layer. Background Art

[0002] Self-powered displays are usually composed of cholesterol liquid crystal displays and solar cells. The materials of solar cells can be divided into two types: opaque and translucent. Figure 1 A display 0 having a light-opaque solar cell in the prior art comprises a cholesterol liquid crystal layer 1 and a solar cell layer 2, wherein the solar cell layer 2 may be, for example, a single-crystalline silicon solar cell or a multi-crystalline silicon solar cell. When the solar cell layer 2 is light-opaque, it can generate electricity efficiently at a relatively low cost. When ambient light enters the display 0 from the outside, part of the light will be reflected by the cholesterol liquid crystal layer 1 and visible to the human eye, and another part of the light will penetrate the cholesterol liquid crystal layer 1 and finally be absorbed by the solar cell layer 2. Such solar cell layer 2 usually has two structures, namely, a busbar and a finger. Such two structures are usually made of metal materials, such as silver metal. Such a structure will greatly reduce the image quality of the display 0. That is, when displaying a black picture, the cholesterol liquid crystal layer 1 will be driven to a focal conic state. In fact, the black screen is presented by the solar cell layer 2. In the bus bar and finger area, in addition to the inability to present a black screen, the stray light reflected by the metal material will also affect the display image. Furthermore, there is a large color difference between the bus bar and finger area and the surrounding area without bus bars and fingers, which is easily noticed by the human eye when the screen is black, resulting in poor image quality of the display 0.

[0003] In addition, if Figure 2As shown, a display 0 with a light-transmitting solar cell in the prior art comprises a cholesterol liquid crystal layer 1, a solar cell layer 2, and a light-absorbing layer 3, wherein the solar cell layer 2 can be, for example, an organic solar cell, a dye-sensitized solar cell, or a perovskite solar cell. When the solar cell layer 2 is in a light-transmitting state, ambient light is incident on the display 0 from the outside, part of the light will be reflected by the cholesterol liquid crystal layer 1 and seen by the human eye, and part of the light will penetrate the cholesterol liquid crystal layer 1 and be absorbed by the solar cell layer 2, and the stray light that penetrates the solar cell layer 2 will be absorbed by the light-absorbing layer 3, wherein the light-absorbing layer 3 is usually made of a black material.

[0004] To explain specifically, for example, when the solar cell layer 2 is in a light-transmitting state, when displaying a black screen, the cholesterol liquid crystal layer 1 will be driven to the focal conic state, and the black screen is actually presented by the solar cell layer 2 to which the light absorption layer 3 is attached; since the black presented in the area of ​​the bus bars and fingers made of transparent conductive material is presented by the light absorption layer 3, and the black presented in other areas is presented by the solar cell layer 2, the human eye can easily perceive the color difference presented in the above two areas, that is, the bus bars and fingers made of transparent conductive material are easily presented when the screen is black, resulting in a decrease in the image quality of the display 0.

[0005] Therefore, in order to enable the self-powered display to achieve the goal of energy saving and carbon reduction regardless of whether it is equipped with a translucent or opaque solar cell, and also provide better display quality, it is necessary to develop an ideal technical method to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a self-powered display device, and can be used to improve the image quality of the self-powered display device.

[0007] The invention relates to a self-powered display device, which comprises a display module and a power module.

[0008] The display module has a front side and a back side, wherein the front side is a display side. The power module is disposed on the back side of the display module and is electrically coupled to the display module. The power module has a plurality of active sides and a plurality of inactive sides between the active sides, wherein a visual color difference (ΔE) between the inactive sides and the active sides does not exceed 10 color difference units. The visual color difference (ΔE) is defined with reference to the CIELAB color space defined by the International Commission on Illumination (CIE) in 1976. The calculation formula of the visual color difference (ΔE) is: ΔE=[(ΔL*)2+(Δa*)2+(Δb*)2]1 / 2, wherein L represents color brightness, a represents green-red value, b represents blue-yellow value, L ranges from 0 to 100, a ranges from -128 to 127, and b ranges from -128 to 127.

[0009] The display module is a cholesterol liquid crystal display module, and the power module is a solar cell module. The cholesterol liquid crystal display module allows light to enter the solar cell module from the front. After receiving the light, the solar cell module will generate electricity to provide the cholesterol liquid crystal display module with the energy required to display at least one picture.

[0010] Next, the active surface is a solar cell, the inactive surface is a busbar, and a shielding layer can be set on the surface of the busbar. The visual color difference between the shielding layer and the solar cell in the direction toward the display module does not exceed 10 color difference units, that is, by covering the busbar with the shielding layer, the visual color difference between the solar cell and the busbar with the shielding layer can be within 10 color difference units.

[0011] The masking layer may include but is not limited to one of dark-colored ink or tape.

[0012] The width of the inactive surface is less than or equal to 50 μm, which is smaller than the width that can be recognized by human eyes.

[0013] Furthermore, the present invention may also be a self-powered display device, which includes a cholesterol liquid crystal display module, a solar cell module, and a shielding layer.

[0014] The cholesteric liquid crystal display module has a front side and a back side, the front side is a display surface, the solar cell module is arranged on the back side of the cholesteric liquid crystal display module and is electrically coupled to the cholesteric liquid crystal display module, the solar cell module has a plurality of solar cells and a plurality of buses between the solar cells, and the shielding layer is correspondingly arranged on the surface of the bus, wherein the visual color difference (ΔE) between the shielding layer and the solar cell does not exceed 10 color difference units.

[0015] The cholesteric liquid crystal display module allows light to enter the solar cell module from the front side. The solar cell module generates electricity after receiving the light to provide energy for the cholesteric liquid crystal display module to display at least one picture.

[0016] The shielding layer may include but is not limited to one of dark-colored ink or tape. For example, the shielding layer may be a dark-colored material that is opaque or has low transmittance, such as black or dark blue tape.

[0017] A light absorbing layer is disposed on an end surface of the solar cell module away from the cholesterol liquid crystal display module, wherein the light absorbing layer is used to absorb stray light penetrating the solar cell module.

[0018] Furthermore, the present invention may also be a self-powered display device, which at least includes a display module, a power module, and a shielding layer.

[0019] The display module includes a front side and a back side, wherein the front side is a display surface; the power module is arranged on the back side of the display module and electrically coupled to the display module; the power module is provided with a plurality of active surfaces and a plurality of inactive surfaces between the active surfaces, wherein each of the active surfaces is correspondingly provided with an electrode layer; and the shielding layer is arranged on the inactive surface, wherein the visual color difference (ΔE) between the shielding layer and the active surface does not exceed 10 color difference units.

[0020] The display module is a cholesterol liquid crystal display module, and the power module is a solar cell module. The cholesterol liquid crystal display module allows light to enter the solar cell module from the front side. After receiving the light, the solar cell module generates electricity to provide the cholesterol liquid crystal display module with the energy required to display at least one picture.

[0021] The active surface is a solar cell, the inactive surface is a bus, the shielding layer covers the bus, and the visual color difference between the shielding layer and the solar cell in the direction toward the display module does not exceed 10 color difference units.

[0022] The masking layer may include but is not limited to one of dark-colored ink or tape.

[0023] The bus bar may be further covered with a protective layer in a direction away from the shielding layer, and the protective layer may further contact the solar cell.

[0024] The power module may further include a substrate disposed between the electrode layer and the display module.

[0025] Therefore, the self-powered display device provided by the present invention is mainly formed by forming a narrower inactive surface on the solar cell module below the cholesterol liquid crystal display module, for example: less than or equal to a width of 50μm that is difficult for the human eye to identify, or covering the inactive surface with a dark-colored shielding layer. The hardware design can effectively make the visual color difference (ΔE) between the inactive surface and the adjacent area not exceed 10 color difference units, thereby reducing the visual color difference between the two and ensuring that the user has a better improved experience when watching the picture displayed by the cholesterol display module.

[0026] Other features and beneficial effects of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other beneficial effects of the present invention can be achieved and obtained by the structures specifically pointed out in the description, claims, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The positions described in the drawings in the following description are relative, and unless otherwise specified, they are all based on the directions in which the components are drawn in the diagrams.

[0028] Figure 1 It is prior art;

[0029] Figure 2 It is prior art;

[0030] Figure 3 It is a structural cross-sectional view of a preferred embodiment of the self-powered display device of the present invention;

[0031] Figure 4 It is a top view of a solar cell of a preferred embodiment of the self-powered display device of the present invention;

[0032] Figure 5This is a structural cross-sectional view of the second preferred embodiment of the self-powered display device of the present invention.

[0033] Figure 6 is a top view of a solar cell of a second preferred embodiment of the self-powered display device of the present invention; and

[0034] Figure 7 It is a structural cross-sectional view of the third preferred embodiment of the self-powered display device of the present invention.

[0035] Reference numerals:

[0036] 0: Display

[0037] 1: Cholesteric liquid crystal layer

[0038] 2: Solar cell layer

[0039] 3, 4: Light absorption layer

[0040] 10: Self-powered display device

[0041] 20: Cholesteric LCD display module

[0042] 26: Positive

[0043] 27: Back

[0044] 40: Solar cell modules

[0045] 46: Solar cell

[0046] 48: Bus

[0047] 60: Shielding layer

[0048] 80: Substrate

[0049] 84: Electrode layer

[0050] 86: Protective layer

[0051] W: Width DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating directions or positions are based on the directions or positions shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof all mean "at least including".

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The purpose of the present invention is to provide a self-powered display device, which can be used with a translucent or opaque solar cell. In addition to being able to output power for displaying images, the self-powered display device can also reduce visual color difference to provide better image quality.

[0056] See also Figure 3 And with Figure 4 , Figure 3 is a structural cross-sectional view of a preferred embodiment of the self-powered display device of the present invention, Figure 4 It is a top view of a solar cell of a preferred embodiment of the self-powered display device of the present invention, wherein the present invention relates to a self-powered display device 10, comprising a display module and a power module, wherein the display module is presented in the form of a cholesterol liquid crystal display module 20, and the power module is presented in the form of a solar cell module 40, and the solar cell module 40 is composed of one of the forms such as a monocrystalline silicon solar cell or a polycrystalline silicon solar cell in an opaque form.

[0057] The cholesteric liquid crystal display module 20 has a front side 26 and a back side 27 arranged relative to the front side 26, wherein the front side 26 is a display surface that can be used to display at least one picture; in addition, the solar cell module 40 is arranged on the back side 27 of the cholesteric liquid crystal display module 20 and is electrically coupled to the cholesteric liquid crystal display module 20, wherein the cholesteric liquid crystal display module 20 allows external light to enter the solar cell module 40 from the front side 26, and the solar cell module 40 generates electricity after receiving the light to provide the energy required for the cholesteric liquid crystal display module 20 to display the picture.

[0058] The solar cell module 40 has a plurality of active surfaces and a plurality of inactive surfaces between the active surfaces, wherein the active surface is also a light-receiving active surface, namely, a solar cell 46, and the inactive surface is also a light-receiving inactive surface, namely, a bus 48 disposed between the solar cells 46. The solar cell 46 is used to absorb external light (sunlight or ambient light) and generate electricity for use by the cholesterol liquid crystal display module 20, and the bus 48 is a metal electrode of the solar cell module 40, which can provide connection with an external circuit. The visual color difference (ΔE) between the bus 48 of the inactive surface and the solar cell 46 of the active surface does not exceed 10 color difference units.

[0059] Furthermore, a shielding layer 60 may be provided on the surface of the bus 48, and the visual color difference (ΔE) between the shielding layer 60 and the solar cell 46 in the direction toward the cholesterol liquid crystal display module 20 does not exceed 10 color difference units, that is, by covering the bus 48 with the shielding layer 60, the visual color difference (ΔE) between the solar cell 46 and the bus 48 with the shielding layer 60 can be within 10 color difference units. Preferably, when the visual color difference (ΔE) between the two is within 5 color difference units, better pixel improvement can be obtained; in addition, the shielding layer 60 is in a form of dark ink or tape, etc. In a preferred embodiment of the present invention, the shielding layer 60 is a dark-colored ink covered on the bus 48 by printing.

[0060] In another preferred embodiment, the width W of the bus bar 48 of the inactive surface may be less than or equal to 50 μm, which is smaller than the width recognizable by the human eye. When the human eye has difficulty recognizing the spacing between two solar cells 46, that is, the width W of the bus bar 48, there is almost no recognizable visual color difference (ΔE). The preferred width W of the bus bar 48 is between 30 and 50 μm. In addition, if a shielding layer 60 covering the bus bar 48 is used, there is even less recognizable visual color difference (ΔE).

[0061] See also Figure 5 And with Figure 6 , Figure 5 is a structural cross-sectional view of a second preferred embodiment of the self-powered display device of the present invention, Figure 6 1 is a top view of a solar cell of a second preferred embodiment of the self-powered display device of the present invention. The self-powered display device 10 of the present invention comprises a cholesterol liquid crystal display module 20, a solar cell module 40, a light absorption layer 4, and a shielding layer 60, wherein the solar cell module 40 is composed of a light-transmitting organic solar cell, a dye-sensitized solar cell or a perovskite solar cell. That is, the biggest difference between the self-powered display device 10 of the second preferred embodiment of the present invention and the self-powered display device 10 of the first preferred embodiment is that the solar cell module 40 of the first preferred embodiment is composed of a solar cell of an opaque state, while the solar cell module 40 of the second preferred embodiment is composed of a solar cell of a light-transmitting state. Therefore, the light absorption layer 4 is provided on the other surface of the solar cell module 40 of the second preferred embodiment relative to the cholesterol liquid crystal display module 20 to absorb stray light penetrating the solar cell module 40.

[0062] As shown in one preferred embodiment, the shielding layer 60 is covered on the bus bar 48 of the solar cell module 40, and the visual color difference (ΔE) between the shielding layer 60 and the solar cell 46 in the direction toward the cholesterol liquid crystal display module 20 does not exceed 10 color difference units, that is, by covering the bus bar 48 with the shielding layer 60, the visual color difference (ΔE) between the solar cell 46 and the shielding layer 60 can be within 10 color difference units. Preferably, when the visual color difference (ΔE) between the two is within 5 color difference units, better pixel improvement can be obtained.

[0063] In another preferred embodiment, if the width W of the bus 48 is less than or equal to 50 μm, since this range is smaller than the width recognizable by the human eye, that is, the human eye has difficulty recognizing the width of the bus 48, there is almost no recognizable visual color difference (ΔE), wherein the preferred width W of the bus 48 is between 30 and 50 μm; in addition, if a shielding layer 60 is provided covering the bus 48, it is even more difficult for the human eye to recognize the visual color difference (ΔE) between the shielding layer 60 and the solar cell 46.

[0064] See also Figure 7, which are structural cross-sectional views of three embodiments of the self-powered display device of the present invention, wherein the self-powered display device 10 of the present invention includes at least one cholesterol liquid crystal display module 20, a solar cell module 40, and a shielding layer 60, wherein the cholesterol liquid crystal display module 20 allows external light to enter the solar cell module 40 from the front side 26, and the solar cell module 40 generates electricity after receiving the light to provide the cholesterol liquid crystal display module 20 with the energy required for displaying the image.

[0065] The cholesteric liquid crystal display module 20 includes a front surface 26 and a back surface 27 disposed opposite to the front surface, wherein the front surface 26 is a display surface for displaying at least one image.

[0066] In addition, the solar cell module 40 is arranged on the back side 27 of the cholesterol liquid crystal display module 20 and is electrically coupled to the cholesterol liquid crystal display module 20. The solar cell module 40 at least includes a plurality of active surfaces, a plurality of inactive surfaces between the active surfaces, a substrate 80, an electrode layer 84, and a protective layer 86, wherein the active surface is a solar cell 46, and the inactive surface is a bus 48 prepared in a metal state and between the solar cells 46. The substrate 80 is presented in a transparent state and is arranged between the solar cells 46 and the cholesterol liquid crystal display module 20, that is, the transparent substrate 80 covers both the solar cell 46 and the bus 48, and the substrate 80 is also provided to the cholesterol liquid crystal display module 20 for use; in addition, the electrode layer 84 is also It is presented in a transparent state and is correspondingly arranged on the solar cell 46 and in contact with the substrate 80. Since the solar cell 46 is arranged intermittently and the bus bar 48 is arranged between each solar cell 46, the electrode layer 84 is also arranged intermittently, and the transparent substrate 80 and the electrode layer 84 can allow external light from the front side 26 of the cholesterol liquid crystal display module 20 to penetrate into the solar cell 46; furthermore, the protective layer 86 covers an end face of the bus bar 48 away from the cholesterol liquid crystal display module 20 to protect the solar cell module 40, and since the bus bar 48 is also in a discontinuous state, the protective layer 86 will fill in between the bus bars 48 and contact with the solar cell 46 to stabilize the shielding layer 60 arranged on the bus bar 48, so that the overall solar cell module 40 is more stable.

[0067] In addition, the shielding layer 60 is disposed between the bus 48 and the substrate 80, that is, the visual color difference (ΔE) between the shielding layer 60 and the solar cell 46 in the direction toward the cholesterol liquid crystal display module 20 does not exceed 10 color difference units. Preferably, when the visual color difference (ΔE) between the two is within 5 color difference units, better pixel improvement can be obtained.

[0068] In another preferred embodiment of the present invention, if the width of the bus 48 is less than or equal to 50 μm, the shielding layer 60 is not required to be provided on the bus 48. This is because the human eye cannot easily recognize the width W of the bus 48 below 50 μm. Therefore, the visual color difference (ΔE) between the shielding layer 60 and the solar cell 46 in the direction toward the cholesterol liquid crystal display module 20 is no more than 10 color difference units. Of course, if the shielding layer 60 is provided on the bus 48 with a narrower width, the overall color difference can also be reduced.

[0069] In summary, by using the self-powered display device 10 provided by the present invention, the setting of the external or internal shielding layer 60 can be utilized to ensure that the visual color difference (ΔE) between the area covered by the shielding layer 60 and the adjacent area in the direction toward the cholesterol liquid crystal display module 20 does not exceed 10 color difference units, or even less than 5 color difference units, so as to increase the pixels of the self-powered display device 10.

[0070] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention can be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background technology at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation on the claim.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-powered display device, characterized in that ,The self-powered display device comprises: a display module having a front side and a back side, wherein the front side is a display surface; and a power module disposed on the back of the display module and electrically coupled to the display module, the power module having a plurality of active surfaces and a plurality of inactive surfaces between the active surfaces; Wherein, the visual color difference (ΔE) between the inactive surface and the active surface does not exceed 10 color difference units.

2. The self-powered display device according to claim 1, characterized in that: The display module in the self-powered display device is a cholesterol liquid crystal display module, and the power module is a solar cell module. The cholesterol liquid crystal display module allows light to enter the solar cell module from the front. After receiving the light, the solar cell module generates electricity to provide the cholesterol liquid crystal display module with the energy required to display at least one picture.

3. The self-powered display device according to claim 2, characterized in that: The active surface of the self-powered display device is a solar cell, the inactive surface is a bus, and a shielding layer is provided on the surface of the bus. The visual color difference between the shielding layer and the solar cell in the direction toward the display module does not exceed 10 color difference units.

4. The self-powered display device according to claim 3, characterized in that: The shielding layer in the self-powered display device is one of ink or tape.

5. The self-powered display device according to claim 1, characterized in that: The width of the inactive surface in the self-powered display device is less than or equal to 50 μm.

6. A self-powered display device, characterized in that ,The self-powered display device comprises: a cholesterol liquid crystal display module having a front surface and a back surface, wherein the front surface is a display surface; a solar cell module disposed on the back of the cholesteric liquid crystal display module and electrically coupled to the cholesteric liquid crystal display module, wherein the solar cell module has a plurality of solar cells and a plurality of bus bars between the solar cells; as well as A shielding layer is correspondingly arranged on the surface of the bus. Wherein, the visual color difference (ΔE) between the shielding layer and the solar cell does not exceed 10 color difference units.

7. The self-powered display device according to claim 6, characterized in that: The cholesteric liquid crystal display module in the self-powered display device allows light to enter the solar cell module from the front side. The solar cell module generates electricity after receiving the light to provide energy for the cholesteric liquid crystal display module to display at least one picture.

8. The self-powered display device according to claim 6, characterized in that: The shielding layer in the self-powered display device is one of ink or tape.

9. The self-powered display device according to claim 6, characterized in that: A light absorbing layer is further disposed on one end surface of the solar cell module in the self-powered display device away from the cholesteric liquid crystal display module.

10. A self-powered display device, characterized in that The self-powered display device comprises: a display module, comprising a front surface and a back surface, wherein the front surface is a display surface; a power module disposed on the back of the display module and electrically coupled to the display module, wherein the power module is provided with a plurality of active surfaces and a plurality of inactive surfaces between the active surfaces, wherein each of the active surfaces is correspondingly provided with an electrode layer; as well as A shielding layer is disposed on the inactive surface, wherein a visual color difference (ΔE) between the shielding layer and the active surface does not exceed 10 color difference units.

11. The self-powered display device according to claim 10, characterized in that: The display module in the self-powered display device is a cholesterol liquid crystal display module, and the power module is a solar cell module. The cholesterol liquid crystal display module allows light to enter the solar cell module from the front. After receiving the light, the solar cell module generates electricity to provide the cholesterol liquid crystal display module with the energy required to display at least one picture.

12. The self-powered display device according to claim 10, characterized in that: The active surface of the self-powered display device is a solar cell, the inactive surface is a bus, the shielding layer covers the bus, and the visual color difference between the shielding layer and the solar cell in the direction toward the display module does not exceed 10 color difference units.

13. The self-powered display device according to claim 12, characterized in that: The direction of the bus in the self-powered display device away from the shielding layer is further covered with a protective layer, and the protective layer is further in contact with the solar cell.

14. The self-powered display device according to claim 10, characterized in that: The shielding layer in the self-powered display device is one of ink or tape.

15. The self-powered display device according to claim 10, characterized in that: The power module in the self-powered display device further includes a substrate disposed between the electrode layer and the display module.

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