Backlight module and wearable display equipment

Abstract

The invention provides a backlight module and wearable display equipment, and the backlight module comprises a substrate which is a flexible substrate; the light-emitting layer comprises light-emitting units and connecting units, the light-emitting unit array is arranged on the substrate, and the connecting units are used for connecting the light-emitting units and fixing the light-emitting units on the substrate; wherein the light emitting unit is made of a long afterglow photoluminescence material, and the connecting unit is made of a flexible fiber material. According to the backlight module and the wearable display equipment provided by the invention, the long afterglow photoluminescent material is excited by natural light to emit light, zero-power-consumption backlight is realized, the wearable display equipment realizes zero power consumption, that is, the wearable display equipment can normally work without charging, and the problems of high power consumption and inconvenience in use of a backlight module in the prior art are effectively solved.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and in particular relates to a backlight module and a wearable display device. Background Art

[0002] With the advancement of electronic products and the rapid development of technology, today's flexible wearable display devices are becoming more and more integrated, smaller and more practical. With the breakthrough of flexible electronic technology, it is possible to manufacture flexible displays with superior performance, simple structure, light weight, low cost and mass production capability.

[0003] In portable electronic devices such as smartphones, smart watches, and bracelets, the display screen consumes most of the power and is required to display images all the time, resulting in high power consumption and the need to charge after a short period of time, which is very inconvenient for consumers. Therefore, low power consumption performance becomes very important, but the displays on existing wearable display devices cannot meet the low power consumption requirements. Summary of the invention

[0004] In view of this, the present application provides a backlight module and a wearable display device to solve the technical problem of excessively high display power consumption of existing wearable display devices.

[0005] In a first aspect, the present application provides a backlight module, comprising:

[0006] A substrate, wherein the substrate is a flexible substrate;

[0007] The light-emitting layer comprises a light-emitting unit and a connecting unit, wherein the light-emitting unit array is arranged on the substrate, and the connecting unit is used to connect the light-emitting units and fix the light-emitting units to the substrate;

[0008] Wherein, the material of the light-emitting unit includes long afterglow photoluminescent material, and the material of the connecting unit includes flexible fiber material.

[0009] In some embodiments, the material of the connecting unit includes at least one of cellulose, polyester, and polyamide;

[0010] And / or, the material of the substrate includes at least one of polydimethylsiloxane and polyimide.

[0011] In some embodiments, the front view of the light emitting unit is at least one of circular, rectangular, elliptical, triangular, and diamond-shaped; and / or

[0012] The front view of the connecting unit is at least one of a straight line, a curve, and a broken line.

[0013] The backlight module provided in the present application is obtained by assembling a long afterglow photoluminescent material and a flexible fiber material. The long afterglow photoluminescent material is stimulated by natural light to achieve the purpose of luminescence, thereby realizing the effect of zero-power backlight and does not require charging, thereby fundamentally solving the high power consumption problem of the backlight module in the prior art.

[0014] In a second aspect, the present application provides a wearable display device, comprising the backlight module, display module and encapsulation layer described above, wherein the encapsulation layer is coated on the backlight module, the encapsulation layer forms an encapsulation space, and the display module is installed on a side of the encapsulation layer close to the light-emitting layer and is located outside the encapsulation space.

[0015] In some embodiments, the backlight module is provided with a plurality of light-emitting areas, the display module is movably mounted on the packaging layer, and the position of the display module corresponds to any one of the light-emitting areas.

[0016] In some embodiments, a one-way light-transmitting layer is further provided on a side of the encapsulation layer away from the substrate, the one-way light-transmitting layer is located outside the encapsulation space, and the one-way light-transmitting layer is used to transmit light from the outside to the light-emitting layer and block the light-emitting layer from emitting light toward the outside;

[0017] When the display module is combined with the one-way light-transmitting layer, the light emitted by the light-emitting layer under the display module is emitted through the display module.

[0018] In some embodiments, a brightness enhancement film layer is disposed on a side of the light emitting layer away from the substrate, and the brightness enhancement film layer is located in the packaging space.

[0019] In some embodiments, the display module includes a light detection sensor, and the light detection sensor is used to detect the brightness of the light emitted by the light emitting layer;

[0020] When the brightness is detected to be lower than a threshold, the light detection sensor sends out an early warning signal to indicate that the energy of the light-emitting layer in the light-emitting area is insufficient; or

[0021] When the brightness is detected to be lower than a threshold, the light detection sensor issues a command to move the display module to another light emitting area.

[0022] In some embodiments, when the brightness is detected to be lower than a threshold, the display module moves to another light-emitting area, and the light-emitting layer with insufficient energy receives external ambient light for charging, and this cycle is repeated to achieve zero power consumption.

[0023] In some embodiments, the wearable display device also includes a transmission component, which includes a driving component and a positioning component. The driving component and the positioning component are both arranged in the packaging layer and outside the packaging space. The driving component is used to drive the display module to move from one light-emitting area to another light-emitting area, and the positioning component is used to fix the display module and make the position of the display module correspond to the light-emitting area.

[0024] The wearable display device provided in the present application is assembled with long afterglow photoluminescent materials and flexible fiber materials, which effectively improves the stretchability of the wearable display device on the one hand, and enables the wearable display device to achieve zero power consumption and no need for charging on the other hand. The afterglow luminescent material absorbs external light (ambient light or sunlight) through the packaging layer to store energy, and then the light is emitted through the display module to display images and text. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 is a schematic diagram of the structure of a backlight module provided in an embodiment of the present application;

[0027] Figure 2 is a schematic structural diagram of a backlight module provided in another embodiment of the present application;

[0028] Figure 3 is a cross-sectional schematic diagram of a wearable display device provided in an embodiment of the present application;

[0029] Figure 4 is a schematic diagram of the front view structure of a wearable display device provided in an embodiment of the present application;

[0030] Figure 5 is a structural schematic diagram of a wearable display device provided by another embodiment of the present application;

[0031] Figure 6 is a structural schematic diagram of a wearable display device provided by another embodiment of the present application;

[0032] Figure 7 This is a schematic diagram of the use of the wearable display device provided in this application.

[0033] Among them, the figure numbers are:

[0034] 10. backlight module; 11. substrate; 12. light-emitting layer; 121. light-emitting unit; 122. connecting unit;

[0035] 20. Display module;

[0036] 30. packaging layer; 300. packaging space;

[0037] 40. One-way light-transmitting layer;

[0038] 50. Brightening film layer;

[0039] 60, transmission assembly; 61, driving member; 611, mechanical gear; 612, roller;

[0040] 70. Brightness signal device;

[0041] 80. Shell. DETAILED DESCRIPTION

[0042] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0043] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0045] 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 drawings, and are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.

[0046] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0047] References to "some embodiments" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. "Multiple" means two or more.

[0048] First, as Figure 1 As shown, the present application provides a backlight module 10, comprising a substrate 11 and a light-emitting layer 12;

[0049] The light-emitting layer 12 includes light-emitting units 121 and connecting units 122. The light-emitting units 121 are arranged in an array on the substrate 11. The connecting units 122 connect the light-emitting units 121 and fix the light-emitting units 121 to the substrate 11.

[0050] The material of the light emitting unit 121 includes a long afterglow photoluminescent material, the substrate 11 is a flexible substrate, and the material of the connecting unit 122 includes a flexible fiber material.

[0051] The light-emitting layer 12 in the backlight module 10 provided by the present application adopts an environmentally friendly energy storage type self-luminous material - a long afterglow photoluminescent material, which can absorb light energy under visible light irradiation, and emit the absorbed energy in a low-frequency visible form under dark conditions. This light-emitting principle is called photoluminescence (i.e., the light-emitting phenomenon caused by visible light excitation). In this way, the backlight module 10 of the present application can absorb natural light energy storage and then emit light without the need for charging, thereby achieving zero backlight power consumption, and fundamentally solving the problem of high power consumption of the backlight module 10 in the prior art.

[0052] In some embodiments, the components of the light-emitting unit 121 include a rare earth light-emitting material matrix and an activator;

[0053] The rare earth luminescent material matrix includes Y 2 O 2 S、SrAl 2 O 4 , CaAl 2 O 4, CaS, Y 2 O 3 、CaTiO 3 , Sr 2 MgSi 2 O 7 At least one of;

[0054] The activator is Dy 3+ 、Nd 3+ ,La 3+ , Tb 3+ 、Ti 4+ 、Eu 2+ 、Tm 3+ 、Eu 3+ Mg 2+ 、Si 4+ , Pr 3+ At least one of .

[0055] It should be noted that Y is yttrium, O is oxygen, S is sulfur, Sr is strontium, Al is aluminum, Ca is calcium, Ti is titanium, Mg is magnesium, Si is silicon, Dy is dysprosium, Nd is neodymium, La is lanthanum, Tb is terbium, Eu is europium, Tm is thulium, and Pr is praseodymium.

[0056] In applications, long afterglow photoluminescent materials generally have different rare earth luminescent material matrices and different activators. Different combinations will have different luminescent spectrum characteristics, which will also lead to different luminescent colors, luminescent intensities, and afterglow times. The luminescent color is generally determined by the luminescent color of the rare earth luminescent material matrix and the luminescent color of the activator. If the matrix and the activator emit light together, color superposition will occur, mainly including green light, blue light, red light, white light and other types of long afterglow photoluminescent materials.

[0057] Specifically, the long afterglow photoluminescent material used in this design is an aluminate system (the rare earth luminescent material matrix is ​​SrAl 2 O 4 and / or CaAl 2 O 4 ), its advantages are that it does not contain radioactive substances, is environmentally friendly, has a super long afterglow, and high brightness. The afterglow time can reach more than 1500 minutes and the service life is more than 10 years.

[0058] In some embodiments, the material of the connection unit 122 includes a flexible fiber material, and the material of the connection unit 122 includes at least one of cellulose, polyester, and polyamide.

[0059] The connection unit 122 is made of flexible fiber material, which can effectively improve the overall stretchability of the backlight module 10 and enable it to be applied to flexible wearable display devices. Specific materials include cellulose, polyester, and polyamide, all of which have good flexibility and stretchability.

[0060] In some embodiments, the substrate 11 is a flexible material, and the material of the substrate 11 includes at least one of polydimethylsiloxane and polyimide.

[0061] The backlight module 10 can be applied to flexible wearable devices by using flexible materials as the substrate 11, thus enriching its application scenarios. Specifically, polydimethylsiloxane and polyimide materials are used as the substrate 11. PDMS and PI have the advantages of simple processing, good elasticity, and good thermal stability.

[0062] In some embodiments, Figure 1 and Figure 2 As shown, the front view of the light emitting unit 121 is at least one of a circle, a rectangle, an ellipse, a triangle, and a diamond.

[0063] In application, the light emitting unit 121 is designed in different shapes, such as square and circle as shown in the figure. The number of materials distributed on the same substrate 11 is the same, and the area of ​​the circle is larger than that of the square, which can increase the brightness. That is, using different shapes can increase the brightness and save costs.

[0064] In some embodiments, Figure 1 and Figure 2 As shown, the front view of the connection unit 122 is at least one of a straight line, a curve, and a broken line.

[0065] In application, the main principle of the manufacturing process of the light-emitting layer 12 is to print a stretchable flexible fiber material in the shape of a corrugation or a buckle on the substrate 11. The corrugation or buckle shape helps to release stress during the stretching process, thereby resulting in a larger strain range. When the pre-strain is released, the connecting unit 122 forms a wavy structure. On the one hand, the light-emitting layer 12 of this structure can adapt to external deformation by changing the wavelength and amplitude of the wave. On the other hand, this wavy design can effectively improve the stretchability of the backlight module 10.

[0066] In a second aspect, the present application provides a wearable display device, such as Figure 3 As shown, it includes the above-mentioned backlight module 10, display module 20 and packaging layer 30;

[0067] The packaging layer 30 is coated on the backlight module 10 , and the packaging layer 30 forms a closed packaging space 300 ;

[0068] The display module 20 is mounted on a side of the packaging layer 30 close to the light emitting layer 12 , and the display module 20 is located outside the packaging space 300 .

[0069] A wearable display device provided in an embodiment of the present application comprises a light source for a display module 20 provided by a light-emitting layer 12, the light-emitting layer 12 is composed of a long afterglow photoluminescent material and a flexible fiber material, the long afterglow luminescent material absorbs ambient sunlight through an encapsulation layer 30 to store energy, and then the light is emitted through the display module 20 to provide a backlight, thereby achieving the purpose of zero-power backlight, and no charging is required during use, which greatly improves the convenience of use for users.

[0070] Furthermore, the encapsulation layer 30 is a structure such as transparent glass or a transparent film layer, which facilitates the light-emitting unit 121 in the encapsulation space 300 to absorb external natural light for energy storage.

[0071] In some embodiments, Figure 3 and Figure 4 As shown, the backlight module 10 is provided with a plurality of light-emitting areas, the display module 20 is movably mounted on the packaging layer 30 , and the position of the display module 20 corresponds to any light-emitting area.

[0072] It should be noted that the light-emitting area includes part of the substrate 11 and the light-emitting layer 12, that is, the entire backlight module 10 is equally divided into multiple light-emitting areas, and the position of the display module 20 corresponds to any one of the light-emitting areas. By movably installing the display module 20 on the packaging layer 30, when the energy in the light-emitting area corresponding to the display module 20 is insufficient (the brightness of the emitted light decreases to a threshold value), the display module 20 can be moved to another light-emitting area, so that the display module 20 can display the picture and / or text in time, ensuring that the wearable display device can always maintain normal display function.

[0073] In application, the movable installation method includes sliding installation, rolling installation, etc. Specifically, a guide rail can be set on the packaging layer 30, and a slider can be set on the display module 20, and the display module 20 can be movable on the backlight module 10 through the sliding cooperation between the slider and the guide rail.

[0074] In some embodiments, Figure 3 As shown, a one-way light-transmitting layer 40 is further provided on one side of the encapsulation layer 30 away from the substrate 11. The one-way light-transmitting layer 40 is located outside the encapsulation space 300. The one-way light-transmitting layer 40 is used to transmit light from the outside to the light-emitting layer 12 and block the light-emitting layer 12 from emitting light toward the outside.

[0075] When the display module 20 is combined with the one-way light-transmitting layer 40 , the light emitted by the light-emitting layer 12 under the display module 20 is emitted through the display module 20 .

[0076] By providing a one-way light-transmitting layer 40, light from the external environment (ambient light or sunlight) can be transmitted through the one-way light-transmitting layer 40 and the encapsulation layer 30 to the light-emitting unit 121 in the encapsulation space 300, thereby being absorbed by the light-emitting unit 121 and storing energy. When the display module 20 is combined with the one-way light-transmitting layer 40, the light-emitting unit 121 in the light-emitting area under the display module 20 can emit light through the display module 20, thereby displaying images and / or text.

[0077] In some embodiments, Figure 3 As shown, a brightness enhancement film layer 50 is provided on a side of the light emitting layer 12 away from the substrate 11 , and the brightness enhancement film layer 50 is located in the packaging space 300 .

[0078] The backlight brightness can be improved by the brightness enhancement film layer 50 , wherein the main material of the brightness enhancement film layer 50 is a prismatic light-gathering anti-reflection film.

[0079] In some embodiments, the display module 20 includes a light detection photoreceptor, which is used to detect the brightness of the light emitted by the light emitting layer 12;

[0080] When the brightness is detected to be lower than the threshold, the light detection sensor sends out an early warning signal to indicate that the energy of the light emitting layer 12 in the current light emitting area is insufficient.

[0081] It should be noted that this is because the afterglow brightness of the long afterglow photoluminescent material shows signs of gradual decline, so the brightness of the light emitted by the long afterglow photoluminescent material is detected by a light detection sensor. When the brightness of the long afterglow material decreases, the light-emitting area corresponding to the display module 20 is switched, so that the light-emitting area after energy storage cooperates with the display module 20 to continue displaying, thereby achieving the purpose of the cycle.

[0082] In application, the light detection sensor detects the brightness of the light emitted by the light-emitting unit 121 in the current light-emitting area, and emits warning signals such as a prompt sound or a prompt light to remind the user that the light-emitting unit 121 in the current light-emitting area is insufficient in energy. The user can move the display module 20 according to the warning signal, and manually move the display module 20 to another light-emitting area after sufficient energy storage, thereby ensuring the display function.

[0083] It should be noted that the brightness value of the light emitted by the light-emitting area can pass through the display module 20, and the brightness of the normal display image and / or text in the display area of ​​the display module 20 is the threshold. When the emitted brightness is lower than the threshold, the image and / or text displayed by the display module 20 will become dark, unclear, etc.

[0084] In another embodiment, the display module 20 includes a light-detecting photosensitive element, which is used to detect the brightness of the light emitted by the light-emitting layer 12 ; when the brightness is detected to be lower than a threshold, the light-detecting photosensitive element issues a command to move the display module 20 to another light-emitting area.

[0085] In this way, the position of the display module 20 can be automatically switched, ensuring that the light-emitting area corresponding to the display module 20 can emit light of sufficient brightness to ensure the normal display of the display module 20 .

[0086] In some embodiments, when the brightness is detected to be lower than a threshold, the display module 20 moves to another light-emitting area, and the light-emitting layer 12 with insufficient energy receives external ambient light for charging, and this cycle is repeated to achieve the purpose of zero power consumption. In application, since a one-way light-transmitting layer 40 is provided on the display module 20, the light-emitting layer 12 can only emit light through the display module 20. Similarly, when the display module 20 is located in a light-emitting area, the light-emitting layer 12 in the light-emitting area is blocked and cannot receive external light. When the energy of the light-emitting unit 121 is exhausted, the light-detecting photoreceptor detects that the brightness is lower than the threshold, and a reminder is issued or the position is automatically changed to move the display module 20 to another light-emitting area full of energy, and the light-emitting unit 121 in the original light-emitting area with insufficient energy can receive external light for charging, and this cycle is repeated, and finally the purpose of zero power consumption without charging is achieved.

[0087] In some embodiments, Figure 5 As shown, the wearable display device further includes a transmission component 60, which moves the display module 20 according to the instruction issued by the light detection sensor, and moves the display module 20 from the current light-emitting area to another light-emitting area.

[0088] In some embodiments, the transmission assembly 60 includes a driving member 61 and a positioning member (not shown in the figure). The driving member 61 and the positioning member are both arranged in the packaging layer 30 and located outside the packaging space 300. The driving member 61 is used to drive the display module 20 to move from one light-emitting area to another light-emitting area, and the positioning member is used to fix the display module 20 and make the position of the display module 20 correspond to the light-emitting area.

[0089] In this way, not only can the position of the display module 20 be moved, but also the position of the display module 20 and the light-emitting area can be ensured to correspond, thereby ensuring that the display module 20 can display images normally.

[0090] Specifically, Figure 5 and Figure 6 As shown, the driving member 61 includes a mechanical gear 611 and a roller 612. The roller 612 is arranged on the encapsulation layer 30 and along the length direction of the backlight module 10. The display module 20 is connected to the roller 612. The mechanical gear 611 is connected to the roller 612. The mechanical gear 611 is used to drive the display module 20 to move on the roller 612. The positioning member includes a buckle, which is arranged on the display module 20. When the display module 20 reaches a specified position, the buckle locks the position of the display module 20 to position and fix it to prevent it from moving and causing blurred display images.

[0091] Furthermore, a buckle is correspondingly provided in each light-emitting area to fix the display module 20 .

[0092] In applications, such as Figure 5 and Figure 6 As shown, what is connected to the buckle is a brightness signal device 70, which has a brightness signal recognition function. The working principle is to convert light energy into electrical energy. The brightness signal device 70 can be used to identify the brightness transmission signal of the light-emitting unit 121, and the signal can be identified to toggle the buckle. After the buckle is toggled, the display module 20 slides under the action of the mechanical gear 611 and the roller 612 to the next buckle, and the cycle continues.

[0093] In applications, such as Figure 7 As shown, the figure is a schematic diagram of the use of a wearable display device. The wearable display device mentioned above includes but is not limited to smart watches, smart bracelets, etc.

[0094] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0095] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A backlight module, characterized in that: include: A substrate, wherein the substrate is a flexible substrate; The light-emitting layer comprises a light-emitting unit and a connecting unit, wherein the light-emitting unit array is arranged on the substrate, and the connecting unit is used to connect the light-emitting units and fix the light-emitting units to the substrate; Wherein, the material of the light-emitting unit includes long afterglow photoluminescent material, and the material of the connecting unit includes flexible fiber material.

2. The backlight module according to claim 1, characterized in that: The material of the connecting unit includes at least one of cellulose, polyester and polyamide; And / or, the material of the substrate includes at least one of polydimethylsiloxane and polyimide.

3. The backlight module according to claim 1, wherein: The front view of the light emitting unit is at least one of circular, rectangular, elliptical, triangular, and rhombus; and / or The front view of the connecting unit is at least one of a straight line, a curve, and a broken line.

4. A wearable display device, characterized in that: It comprises the backlight module, display module and packaging layer as described in any one of claims 1 to 3, wherein the packaging layer is coated on the backlight module, the packaging layer forms a packaging space, and the display module is installed on a side of the packaging layer close to the light-emitting layer and is located outside the packaging space.

5. The wearable display device according to claim 4, characterized in that: The backlight module is provided with a plurality of light-emitting areas, the display module is movably mounted on the packaging layer, and the position of the display module corresponds to any one of the light-emitting areas.

6. The wearable display device according to claim 5, characterized in that: A one-way light-transmitting layer is further provided on one side of the encapsulation layer away from the substrate, the one-way light-transmitting layer is located outside the encapsulation space, and the one-way light-transmitting layer is used to transmit light from the outside to the light-emitting layer and block the light-emitting layer from emitting light toward the outside; When the display module is combined with the one-way light-transmitting layer, the light emitted by the light-emitting layer under the display module is emitted through the display module.

7. The wearable display device according to claim 4, characterized in that: A brightness enhancement film layer is provided on a side of the light emitting layer away from the substrate, and the brightness enhancement film layer is located in the packaging space.

8. The wearable display device according to claim 5, characterized in that: The display module includes a light detection sensor, and the light detection sensor is used to detect the brightness of the light emitted by the light emitting layer; When the brightness is detected to be lower than a threshold, the light detection sensor sends out an early warning signal to indicate that the energy of the light-emitting layer in the light-emitting area is insufficient; or When the brightness is detected to be lower than a threshold, the light detection sensor issues a command to move the display module to another light emitting area.

9. The wearable display device according to claim 8, characterized in that: When it is detected that the brightness is lower than the threshold, the display module moves to another light-emitting area, and the light-emitting layer with insufficient energy receives external ambient light for charging, and this cycle is repeated to achieve the purpose of zero power consumption.

10. The wearable display device according to any one of claims 4 to 9, characterized in that: The wearable display device also includes a transmission component, which includes a driving member and a positioning member. The driving member and the positioning member are both arranged in the packaging layer and located outside the packaging space. The driving member is used to drive the display module to move from one light-emitting area to another light-emitting area, and the positioning member is used to fix the display module and make the position of the display module correspond to the light-emitting area.

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