Energy-saving display module and smart watch

Abstract

The utility model discloses an energy-saving display module which comprises a transparent display screen and a thin-film solar cell arranged on the back face of the transparent display screen, and an anti-reflection film layer is arranged between the transparent display screen and the thin-film solar cell. The energy-saving display module can improve the display definition. The utility model discloses an intelligent watch which comprises the energy-saving display module.

Description

Technical Field

[0001] The utility model relates to wearable technology, in particular to an energy-saving display module and a smart watch. Background Art

[0002] A smartwatch is a wearable device that is usually worn on the wrist and can provide a variety of functions, including but not limited to health monitoring, exercise tracking, smart reminders, music control, payment functions, applications, voice assistants, etc. Limited by the size of smartwatches, battery life has always been a major pain point for smartwatches.

[0003] In order to solve the above problems, a Chinese patent with patent application number CN201320647570.0 discloses a solar smart watch, which includes: a watch body and a strap connected to the watch body; the watch body includes: a transparent display for displaying the status, information and functions of the mobile phone; a time control module connected to the transparent display; a lithium battery connected to the transparent display and the time control module respectively; a solar panel connected to the lithium battery, wherein the transparent display is at the outermost side of the mobile phone body, and the solar panel is arranged at an adjacent position on the inner side of the transparent display. The Chinese patent adopts a transparent display and a solar panel to match, and the solar panel is arranged on the back of the transparent display, and the solar panel is used to convert sunlight into electrical energy to charge the lithium battery, so as to improve the battery life of the smart watch.

[0004] However, the difference in refractive index between the transparent display and the solar panel is relatively large, and sunlight will generate a large amount of reflected light at the interface between the transparent display and the solar panel due to the sudden change in refractive index, thereby affecting the display clarity of the transparent display. Utility Model Content

[0005] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides an energy-saving display module, which can improve display clarity.

[0006] The utility model provides a smart watch, comprising the energy-saving display module.

[0007] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0008] An energy-saving display module comprises a transparent display screen and a thin-film solar cell arranged on the back of the transparent display screen, wherein an anti-reflection film layer is arranged between the transparent display screen and the thin-film solar cell.

[0009] Furthermore, the anti-reflection film layer includes a plurality of high refractive index film layers and a plurality of low refractive index film layers, and the high refractive index film layers and the low refractive index film layers are alternately stacked.

[0010] Furthermore, the high refractive index film layer is a titanium dioxide film layer, a silicon nitride film layer, an aluminum oxide film layer or a zirconium oxide film layer.

[0011] Furthermore, the low refractive index film layer is a silicon dioxide film layer, a nanoporous silicon oxide film layer or a silicon nitride film layer.

[0012] Furthermore, the total thickness of the anti-reflection film layer is 230nm-310nm.

[0013] Furthermore, the anti-reflection film layer includes a first low refractive index film layer, a first high refractive index film layer, a second low refractive index film layer, a second high refractive index film layer, a third low refractive index film layer, and a third high refractive index film layer stacked in sequence, wherein the first low refractive index film layer faces the transparent display screen, and the third high refractive index film layer faces the thin-film solar cell.

[0014] Furthermore, the thicknesses of the first low refractive index film layer, the first high refractive index film layer, the second low refractive index film layer, the second high refractive index film layer, the third low refractive index film layer, and the third high refractive index film layer are 100nm-130nm, 10nm-20nm, 30nm-40nm, 40nm-50nm, 10nm-20nm, and 40nm-50nm, respectively.

[0015] Furthermore, the transparent display screen is a PMOLED display screen.

[0016] A smart watch, comprising:

[0017] A dial, the upper surface of which is provided with a mounting cavity with an opening;

[0018] a watch strap connected to opposite sides of the watch dial;

[0019] The energy-saving display module is arranged in the assembly cavity of the dial;

[0020] A rechargeable battery is arranged in the assembly cavity of the dial and is located on the back of the energy-saving display module, and is electrically connected to the transparent display screen and the thin-film solar cell of the energy-saving display module respectively;

[0021] A cover plate is arranged on the upper surface of the dial to close the opening of the assembly cavity.

[0022] Furthermore, the smart watch also includes a flexible solar cell, which is arranged on the watch strap and electrically connected to the rechargeable battery.

[0023] The utility model has the following beneficial effects: the energy-saving display module of the utility model sets the anti-reflection film layer between the transparent display screen and the thin-film solar cell, and uses the anti-reflection film layer to reduce the interface reflectivity between the transparent display screen and the thin-film solar cell, so that the reflected light generated when the sunlight reaches the interface between the transparent display screen and the thin-film solar cell after passing through the transparent display screen is reduced, thereby reducing the influence of the reflected light on the transparent display screen and improving the display clarity of the transparent display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a stacking structure diagram of the energy-saving display module provided by the utility model.

[0025] Figure 2 This is a diagram of the stacking structure of the anti-reflection film layer in the energy-saving display module provided by the utility model.

[0026] Figure 3 This is a stacking structure diagram of the smart watch provided by the utility model. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiment 1

[0032] like Figure 1 As shown, an energy-saving display module includes a transparent display screen 10 and a thin-film solar cell 40 arranged on the back of the transparent display screen 10 , and an anti-reflection film layer 30 is arranged between the transparent display screen 10 and the thin-film solar cell 40 .

[0033] The energy-saving display module of the utility model sets the anti-reflection film layer 30 between the transparent display screen 10 and the thin-film solar cell 40, and uses the anti-reflection film layer 30 to reduce the interface reflectivity between the transparent display screen 10 and the thin-film solar cell 40, so that the reflected light generated when the sunlight reaches the interface between the transparent display screen 10 and the thin-film solar cell 40 after passing through the transparent display screen 10 is reduced, thereby reducing the influence of the reflected light on the transparent display screen 10 and improving the display clarity of the transparent display screen 10.

[0034] During preparation, the anti-reflection film layer 30 is first formed on the light-absorbing side surface of the thin-film solar cell 40 using a process such as CVD or PVD, and then the transparent display screen 10 is bonded to the light-absorbing side surface of the thin-film solar cell 40 through an OCA optical adhesive 20, so that the anti-reflection film layer 30 is sandwiched at the interface between the transparent display screen 10 and the thin-film solar cell 40.

[0035] The OCA optical adhesive 20, whose full name is Optically Clear Adhesive, is a special adhesive specially used for bonding transparent optical components. It is a kind of pressure-sensitive adhesive with the characteristics of high light transmittance (total light transmittance>99%), high adhesion, strong weather resistance, and UV resistance. It has extremely high bonding strength and low elastic modulus of the adhesive layer after curing, so that it has little shrinkage and deformation after curing, which can effectively reduce the reflection loss of light.

[0036] The OCA optical adhesive 20 should be as thin as possible to minimize light loss. In this embodiment, the thickness of the OCA optical adhesive 20 is 25 μm.

[0037] The anti-reflection film layer 30 includes a plurality of high refractive index film layers and a plurality of low refractive index film layers, and the high refractive index film layers and the low refractive index film layers are alternately stacked.

[0038] The anti-reflection film of the utility model is based on the principle of light coherence. Since the high refractive index film layer and the low refractive index film layer have different refractive indices for light, sunlight will be reflected at the interface between the adjacent high refractive index film layer and the low refractive index film layer. The wavelength of the reflected light is related to the film thickness of the refractive index film and the low refractive index film layer. By matching the thickness of the high refractive index film layer and the low refractive index film layer, the optical path difference between adjacent reflected light rays is made to be one quarter of a wavelength, and the reflected light rays will interfere with each other and cancel each other out, thereby achieving the purpose of reducing the reflectivity.

[0039] The high refractive index film layer may be, but is not limited to, a titanium dioxide film layer, a silicon nitride film layer, an aluminum oxide film layer or a zirconium oxide film layer, and the low refractive index film layer may be, but is not limited to, a silicon dioxide film layer, a nanoporous silicon oxide film layer or a silicon nitride film layer.

[0040] It should be noted here that the refractive index of the silicon nitride film layer is not fixed, and its refractive index depends on the ratio between nitrogen and silicon. The higher the nitrogen content in the silicon nitride film layer, the higher its refractive index. Conversely, the higher the silicon content in the silicon nitride film layer, the lower its refractive index. Therefore, by adjusting the ratio between nitrogen and silicon in the silicon nitride film layer, the refractive index of the silicon nitride film layer can be changed. Therefore, the silicon nitride film layer can be used as both the high refractive index film layer and the low refractive index film layer.

[0041] The total thickness of the anti-reflection film layer 30 is 230nm-310nm, wherein the thickness of each high refractive index film layer and each low refractive index film layer is 5nm-150nm.

[0042] In this embodiment, the high refractive index film layer is a silicon nitride film layer, whose refractive index for visible light is between 1.8-2.7, and the low refractive index film layer is a silicon dioxide film layer, whose refractive index for visible light is between 1.4-1.5. Figure 2As shown, the anti-reflection film layer 30 includes a first low refractive index film layer 31, a first high refractive index film layer 32, a second low refractive index film layer 33, a second high refractive index film layer 34, a third low refractive index film layer 35, and a third high refractive index film layer 36 which are stacked in sequence, wherein the first low refractive index film layer 31 faces the transparent display screen 10, and the third high refractive index film layer 36 faces the thin film solar cell 40; the thicknesses of the first low refractive index film layer 31, the first high refractive index film layer 32, the second low refractive index film layer 33, the second high refractive index film layer 34, the third low refractive index film layer 35, and the third high refractive index film layer 36 are 100nm-130nm, 10nm-20nm, 30nm-40nm, 40nm-50nm, 10nm-20nm, and 40nm-50nm, respectively.

[0043] In this embodiment, the transparent display screen 10 is a PMOLED display screen, preferably a full-color PMOLED display screen, which may be provided with a touch function layer. The touch function layer may be set on the top of the transparent display screen 10 in an external form, or may be integrated into the interior of the transparent display screen 10 using ONCELL or INCELL.

[0044] Embodiment 2

[0045] like Figure 3 As shown, a smart watch includes:

[0046] The dial 1 has an assembly cavity 100 with an opening on its upper surface;

[0047] A watch strap 2 connected to two opposite sides of the watch dial 1;

[0048] The energy-saving display module 3 described in the first embodiment is arranged in the assembly cavity 100 of the dial 1;

[0049] The rechargeable battery 4 is arranged in the assembly cavity 100 of the dial 1 and is located on the back of the energy-saving display module 3, and is electrically connected to the transparent display screen 10 and the thin-film solar cell 440 of the energy-saving display module 3 respectively;

[0050] The cover plate 5 is disposed on the upper surface of the dial 1 to close the opening of the assembly cavity 100 .

[0051] The smart watch of the utility model adopts the transparent display screen 10 and the thin film solar cell 440 in combination, and the thin film solar cell 440 is set on the back of the transparent display screen 10. The thin film solar cell 440 absorbs sunlight passing through the transparent display screen 10 to generate electricity, and the generated electricity is used to charge the rechargeable battery 4. The rechargeable battery 4 then provides a stable driving voltage for the transparent display screen 10 to increase the battery life of the watch.

[0052] The smart watch further includes a flexible solar cell 6 , which is disposed on the watch strap 2 and electrically connected to the rechargeable battery 4 .

[0053] The smart watch of the utility model arranges the flexible solar cell 6 on the strap 2, utilizes the flexible solar cell 6 to absorb sunlight irradiated on the strap 2 to generate electricity, and uses the generated electricity to charge the rechargeable battery 4, and then the rechargeable battery 4 provides a stable driving voltage for the transparent display screen 10, so as to improve the battery life of the watch.

[0054] If the strap 2 is an integral silicone belt or rubber belt, etc., the flexible solar cell 6 can adopt a thin-film solar cell. If the strap 2 is a chain-type steel belt, etc., the flexible solar cell 6 can adopt a substrate-type solar cell, and multiple substrate-type solar cells are respectively arranged on each section of the strap to form a series-parallel structure.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An energy-saving display module, comprising a transparent display screen and a thin-film solar cell arranged on the back of the transparent display screen, characterized in that: An anti-reflection film layer is arranged between the transparent display screen and the thin-film solar cell.

2. The energy-saving display module according to claim 1, characterized in that: The anti-reflection film layer comprises a plurality of high refractive index film layers and a plurality of low refractive index film layers, and the high refractive index film layers and the low refractive index film layers are alternately stacked.

3. The energy-saving display module according to claim 2, characterized in that: The high refractive index film layer is a titanium dioxide film layer, a silicon nitride film layer, an aluminum oxide film layer or a zirconium oxide film layer.

4. The energy-saving display module according to claim 2, characterized in that: The low refractive index film layer is a silicon dioxide film layer, a nanoporous silicon oxide film layer or a silicon nitride film layer.

5. The energy-saving display module according to claim 1, characterized in that: The total thickness of the anti-reflection film layer is 230nm-310nm.

6. The energy-saving display module according to claim 1, characterized in that: The anti-reflection film layer includes a first low refractive index film layer, a first high refractive index film layer, a second low refractive index film layer, a second high refractive index film layer, a third low refractive index film layer, and a third high refractive index film layer stacked in sequence, wherein the first low refractive index film layer faces the transparent display screen, and the third high refractive index film layer faces the thin-film solar cell.

7. The energy-saving display module according to claim 6, characterized in that: The thicknesses of the first low refractive index film layer, the first high refractive index film layer, the second low refractive index film layer, the second high refractive index film layer, the third low refractive index film layer, and the third high refractive index film layer are 100nm-130nm, 10nm-20nm, 30nm-40nm, 40nm-50nm, 10nm-20nm, and 40nm-50nm, respectively.

8. The energy-saving display module according to claim 1, characterized in that: The transparent display screen is a PMOLED display screen.

9. A smart watch, characterized in that: include: A dial, the upper surface of which is provided with a mounting cavity with an opening; a watch strap connected to opposite sides of the watch dial; The energy-saving display module of claim 1 is arranged in the assembly cavity of the dial; A rechargeable battery is arranged in the assembly cavity of the dial and is located on the back of the energy-saving display module, and is electrically connected to the transparent display screen and the thin-film solar cell of the energy-saving display module respectively; A cover plate is arranged on the upper surface of the dial to close the opening of the assembly cavity.

10. The smart watch according to claim 9, characterized in that: The smart watch also includes a flexible solar cell, which is arranged on the watch strap and electrically connected to the rechargeable battery.

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