Light-emitting device

Abstract

The embodiment of the utility model discloses a light-emitting device which comprises a flexible substrate and a flexible light-transmitting layer which are oppositely arranged, at least one cavity is formed between the flexible substrate and the flexible light-transmitting layer, and a flexible light-emitting device is arranged in the cavity; the flexible light-emitting device can move in the cavity; the distance between the edge of the vertical projection of the cavity on the flexible substrate and the edge of the flexible light-emitting device is larger than 0, and the thickness of the cavity is larger than or equal to the thickness of the flexible light-emitting device in the direction from the flexible substrate to the flexible light-transmitting layer. According to the embodiment of the utility model, the stress borne by the flexible light-emitting device can be reduced, and the flexible light-emitting device is prevented from being damaged due to overlarge stress.

Description

TECHNICAL FIELD

[0001] The utility model relates to a light emitting technology field especially relates to a light emitting device. BACKGROUND

[0002] The scheme generally adopted by the conventional flexible light emitting device in application is connecting the flexible light emitting device to a flexible substrate through the adhesive mode, and then carrying out the assembly operation, and the problem of this mode is that the flexible light emitting device is subjected to the great stress in bending, and the performance is easily damaged. SUMMARY

[0003] The utility model provides a light emitting device can reduce the stress that flexible light emitting device received, avoid flexible light emitting device and be damaged because of stress too big.

[0004] According to one aspect of the utility model, a kind of light emitting device, comprising:

[0005] Oppositely arranged flexible substrate and flexible light transmission layer, flexible substrate and flexible light transmission layer between there is at least one cavity, flexible light emitting device is arranged in cavity;Flexible light emitting device is movable in cavity;

[0006] The distance between the edge of the vertical projection of the flexible substrate and the edge of the vertical projection of the flexible light emitting device on the flexible substrate is greater than 0, and along the direction of the flexible substrate pointing to the flexible light transmission layer, the thickness of the cavity is greater than or equal to the thickness of the flexible light emitting device.

[0007] Optionally, the distance between the edge of the vertical projection of the flexible substrate and the edge of the vertical projection of the flexible light emitting device on the flexible substrate is greater than or equal to 0.2mm;

[0008] The thickness of the cavity is greater than the thickness of the flexible light emitting device, and less than or equal to 10 times the thickness of the flexible light emitting device.

[0009] Optionally, adhesive layer is arranged between flexible substrate and flexible light transmission layer, and the space between flexible substrate and flexible light transmission layer is separated into multiple cavities by adhesive layer;

[0010] Alternatively, flexible substrate and flexible light transmission layer are connected by buckle structure, and the space between flexible substrate and flexible light transmission layer is separated into multiple cavities by buckle structure;

[0011] Alternatively, flexible substrate and flexible light transmission layer are connected by sewing structure, and the space between flexible substrate and flexible light transmission layer is separated into multiple cavities by sewing structure.

[0012] Optionally, the shape of the vertical projection of the cavity is the same as the shape of the vertical projection of the flexible light emitting device located in the cavity on the flexible substrate.

[0013] Optionally, the shape of the vertical projection of the cavity on the flexible substrate comprises at least one of a polygon, a circle, an ellipse, a semicircle, a semi-ellipse and a sector.

[0014] Optionally, the cavity comprises an opening, the flexible light-emitting device in the cavity is electrically connected with the connecting line, and the connecting line passes through the opening and is connected with an external circuit.

[0015] Optionally, the cavity comprises a side wall, the side wall is located between the flexible substrate and the flexible light-transmitting layer, and the opening is arranged on the side wall of the cavity.

[0016] Optionally, the light transmittance of the flexible light-transmitting layer is greater than or equal to 10%.

[0017] Optionally, the material of the flexible light-transmitting layer is rubber, resin or cloth.

[0018] The material of the flexible substrate is cloth, plastic or rubber.

[0019] Optionally, the flexible light-emitting device comprises an OLED light-emitting device, an LED light-emitting device, a perovskite LED light-emitting device, a QLED light-emitting device, a miniled light-emitting device or a microled light-emitting device.

[0020] The light-emitting device provided by the embodiment of the utility model discloses a flexible substrate and a flexible light-transmitting layer arranged oppositely, and at least one cavity is arranged between the flexible substrate and the flexible light-transmitting layer, and a flexible light-emitting device is arranged in the cavity, the flexible light-emitting device is movable in the cavity, the distance between the edge of the vertical projection of the cavity on the flexible substrate and the edge of the vertical projection of the flexible light-emitting device on the flexible substrate is greater than 0, and along the direction of the flexible substrate pointing to the flexible light-transmitting layer, the thickness of the cavity is greater than or equal to the thickness of the flexible light-emitting device, when the light-emitting device is subjected to an external force, the flexible substrate and the flexible light-transmitting layer will be deformed, due to the existence of the cavity, the flexible light-emitting device will not be directly affected by the external force, but can move freely in the cavity to adapt to the need of deformation, so that the stress of the flexible light-emitting device can be reduced, and the flexible light-emitting device can be prevented from being damaged due to excessive stress.

[0021] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the utility model, nor is it used to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0023] Figure 1 is a structural schematic diagram of a light emitting device provided by an embodiment of the present application.

[0024] Figure 2 is a sectional view of a light emitting device provided by an embodiment of the present application.

[0025] Figure 3 is a structural schematic diagram of another light emitting device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the person skilled in the art better understand the present application scheme, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0027] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0028] The embodiments of the present application provide a light emitting device, which can be a light therapy device, and can be exemplarily a light therapy mask or an arthritis light therapy device. Figure 1 is a structural schematic diagram of a light emitting device provided by an embodiment of the present application. Figure 2 is a sectional view of a light emitting device provided by an embodiment of the present application. Reference Figure 1 and Figure 2 , the light emitting device comprises:

[0029] The flexible substrate 10 and the flexible light-transmitting layer 20 are oppositely arranged, and at least one cavity 30 is arranged between the flexible substrate 10 and the flexible light-transmitting layer 20, and the flexible light-emitting device 40 is arranged in the cavity 30; the flexible light-emitting device 40 is movable in the cavity 30.

[0030] The distance D between the edge of the vertical projection of the flexible substrate 10 and the edge of the vertical projection of the flexible light-emitting device 40 in the cavity 30 is greater than 0, and the thickness of the cavity 30 is greater than or equal to the thickness of the flexible light-emitting device 40 in the direction of the flexible substrate 10 pointing to the flexible light-transmitting layer 20.

[0031] The flexible substrate 10 serves as the base of the light-emitting device and provides necessary support and connection. The flexible substrate 10 is usually made of flexible materials that can be bent, such as cloth with stretchable properties, plastic, rubber, etc. The flexible light-transmitting layer 20 is covered on the flexible substrate 10 and mainly serves to protect the internal flexible light-emitting device 40 while allowing light to pass through. The flexible light-transmitting layer 20 is made of materials that are flexible and light-transmitting. The cavity 30 is located between the flexible substrate 10 and the flexible light-transmitting layer 20 and provides space for the flexible light-emitting device 40. The number, shape, and distribution of the cavity 30 can be designed according to actual needs to achieve specific light-emitting effects. The flexible light-emitting device 40 is used to emit light of a certain wavelength. The flexible light-emitting device 40 is movable in the cavity 30, i.e., the flexible light-emitting device 40 is not connected to the flexible substrate 10 and the light-transmitting layer 20.

[0032] The flexible light-emitting device 40 can have a flexible substrate, an encapsulation layer, electrodes, a light-emitting layer, and a protective layer. For example, the light-emitting layer is arranged between the anode and the cathode, the anode, the cathode, and the light-emitting layer are arranged on the flexible substrate, the encapsulation layer is arranged on the side of the light-emitting layer, the anode, and the cathode away from the flexible substrate, and the encapsulation layer covers the light-emitting layer, the anode, and the cathode to protect the light-emitting layer, the anode, and the cathode. Meanwhile, pins connected to the anode and the cathode can be arranged on the flexible substrate, and the pins are used to connect external circuits to transmit driving signals to the anode and the cathode to drive the light-emitting layer to emit light.

[0033] Specifically, when the light emitting device is bent, the flexible light emitting device 40 will not be fixed in a position and suffer excessive stress, instead, the flexible light emitting device 40 will move in the cavity 30 to adapt to the bent shape of the light emitting device when the light emitting device is bent, thereby reducing the stress suffered by the flexible light emitting device during the overall bending. The distance D between the edge of the vertical projection of the cavity 30 and the edge of the vertical projection of the flexible light emitting device 40 on the flexible substrate 10 is greater than 0, so that the flexible light emitting device 40 will not be close to the edge of the cavity 30, so that the flexible light emitting device 40 can move along the surface of the flexible substrate 10. In the direction of the flexible light emitting device 40 pointing to the flexible light-transmitting layer 20 along the flexible substrate 10, the thickness of the cavity 30 is greater than or equal to the thickness of the flexible light emitting device 40, which provides sufficient moving space for the flexible light emitting device 40 in the cavity and will not be limited due to the too small cavity 30. When the device is subjected to external force (such as bending, stretching, etc.), the flexible substrate 10 and the flexible light-transmitting layer 20 will be deformed, and due to the existence of the cavity 30, the flexible light emitting device 40 will not be directly affected by the external force, but can move freely in the cavity 30 to adapt to the need of deformation. During the bending or deformation, the flexible light emitting device 40 will move according to the shape and size of the cavity 30, so that the stress suffered by the flexible light emitting device 40 can be reduced, and the flexible light emitting device 40 can be prevented from being damaged due to excessive stress.

[0034] The light emitting device provided by the embodiment of the utility model includes the flexible substrate 10 and the flexible light-transmitting layer 20 which are oppositely arranged, and at least one cavity 30 is arranged between the flexible substrate 10 and the flexible light-transmitting layer 20, and the flexible light emitting device 40 is arranged in the cavity 30; the flexible light emitting device 40 is movable in the cavity 30, the distance D between the edge of the vertical projection of the cavity 30 and the edge of the vertical projection of the flexible light emitting device 40 on the flexible substrate 10 is greater than 0, and in the direction of the flexible light emitting device 40 pointing to the flexible light-transmitting layer 20 along the flexible substrate 10, the thickness of the cavity 30 is greater than or equal to the thickness of the flexible light emitting device 40, when the light emitting device is subjected to external force, the flexible substrate 10 and the flexible light-transmitting layer 20 will be deformed, and due to the existence of the cavity 30, the flexible light emitting device 40 will not be directly affected by the external force, but can move freely in the cavity 30 to adapt to the need of deformation, thereby the stress suffered by the flexible light emitting device 40 can be reduced, and the flexible light emitting device 40 can be prevented from being damaged due to excessive stress.

[0035] On the basis of the above embodiment, optionally, the distance D between the edge of the vertical projection of the cavity 30 and the edge of the vertical projection of the flexible light emitting device 40 on the flexible substrate 10 is greater than or equal to 0.2mm;

[0036] The thickness of the cavity 30 is greater than the thickness of the flexible light emitting device 40, and is less than or equal to 10 times the thickness of the flexible light emitting device 40.

[0037] Specifically, if the distance D between the edge of the vertical projection of the cavity 30 and the edge of the vertical projection of the flexible light emitting device 40 on the flexible substrate 10 is too small, so that the flexible light emitting device 40 has too small a moving space in the air 30, by setting the distance D between the edge of the vertical projection of the cavity 30 and the edge of the flexible light emitting device 40 on the flexible substrate 10 to be greater than or equal to 0.2mm, so that the flexible light emitting device 40 has a larger moving space in the cavity 40, the stress that the flexible light emitting device 40 receives when the light emitting device is subjected to an external force can be further reduced, and damage to the flexible light emitting device 40 due to excessive stress can be avoided. For example, the distance D between the edge of the vertical projection of the cavity 30 and the edge of the vertical projection of the flexible light emitting device 40 on the flexible substrate 10 can be 0.3mm, 0.4mm, 0.5mm, etc.

[0038] If the thickness of the cavity 30 is too small, the movement of the flexible light emitting device 40 will be affected, and if the thickness of the cavity 30 is too large, the flexible light emitting device 40 can move excessively and cause inversion and other problems, thereby affecting light emission. By setting the thickness of the cavity 30 to be greater than the thickness of the flexible light emitting device 40 and less than or equal to 10 times the thickness of the flexible light emitting device 40, the flexible light emitting device 40 can move more freely in the cavity 30 to adapt to the curved shape of the light emitting device, thereby avoiding damage to the flexible light emitting device 40 due to excessive stress, and avoiding excessive movement of the flexible light emitting device 40 in the cavity 30 to affect light emission of the flexible light emitting device 40. For example, the thickness of the cavity 30 can be 2 times, 3 times, 4 times, 5 times, 7 times, 8 times or 10 times the thickness of the flexible light emitting device 40.

[0039] It should be noted that the distance D between the edge of the vertical projection of the cavity 30 and the edge of the vertical projection of the flexible light emitting device 40 on the flexible substrate 10 in the embodiment refers to the distance between the edge of the flexible light emitting device 40 and the edge of the cavity 30 when the flexible light emitting device 40 is arranged at the center position of the vertical projection of the cavity 30 on the flexible substrate 10.

[0040] Figure 3 is a structural schematic view of another light emitting device provided by the embodiment of the present application, which is based on the above-mentioned embodiment, and optionally, Figure 1 and Figure 3 a bonding layer 50 is arranged between the flexible substrate 10 and the flexible light-transmitting layer 20, and the bonding layer 50 divides the space between the flexible substrate 10 and the flexible light-transmitting layer 20 into a plurality of cavities 30 Figure 3

[0041] ​Alternatively, the flexible substrate 10 and the flexible light-transmitting layer 20 are connected through the buckle structure 51, and the buckle structure 51 divides the space between the flexible substrate 10 and the flexible light-transmitting layer 20 into a plurality of cavities 30. Figure 1

[0042] Alternatively, the flexible substrate 10 and the flexible light-transmitting layer 20 are connected through the stitching structure, and the stitching structure divides the space between the flexible substrate 20 and the flexible light-transmitting layer 20 into a plurality of cavities 30.

[0043] Specifically, through the bonding layer 50, the buckle structure 51 connection or the stitching structure connection, the flexible substrate 10 and the flexible light-transmitting layer 20 can be firmly connected together, and the structural stability and durability of the entire light-emitting device are improved.

[0044] In addition, when the flexible substrate 10 and the flexible light-transmitting layer 20 are connected through the buckle structure 51 or the stitching structure, the flexible light-emitting device 40 can be first arranged between the flexible substrate 10 and the flexible light-transmitting layer 20, and then the flexible substrate 10 and the flexible light-transmitting layer 20 are connected through the buckle structure 51 or the stitching structure to form the cavity 30. When the flexible substrate 10 and the flexible light-transmitting layer 20 are connected through the bonding layer 50, the bonding layer 50 and the flexible light-emitting device 40 can be first arranged on the flexible substrate 10, and then the flexible light-transmitting layer 20 is arranged. After the bonding layer 50 is cured, the flexible substrate 10 and the flexible light-transmitting layer 20 are fixedly connected.

[0045] On the basis of the above-mentioned embodiments, optionally, the shape of the vertical projection of the cavity 30 on the flexible substrate 10 is the same as the shape of the vertical projection of the flexible light-emitting device 40 located in the cavity 30 on the flexible substrate 10.

[0046] In this way, the edges of the flexible light-emitting device 40 and the side walls of the cavity 30 are parallel to each other, so that when the area of the vertical projection of the cavity 30 on the flexible substrate 10 is constant, the distance between the flexible light-emitting device 40 and the side walls of the cavity 30 is greater, and the activity range of the flexible light-emitting device 40 in the cavity 30 is greater, further avoiding damage to the flexible light-emitting device 40 due to excessive stress.

[0047] On the basis of the above-mentioned embodiments, optionally, with reference to Figure 2 , the shape of the vertical projection of the cavity 30 on the flexible substrate 10 includes at least one of a polygon, a circle, an ellipse, a semicircle, a semi-ellipse, and a sector.

[0048] Specifically, the shape of the vertical projection of the cavity 30 on the flexible substrate 10 can be a triangle, a quadrilateral, a pentagon, a hexagon, etc. polygon, or can be a circle, an ellipse, a semicircle, a semi-ellipse or a sector, or can be a combination shape of at least two of a polygon, a circle, an ellipse, a semicircle, a semi-ellipse and a sector.

[0049] ​On the basis of the above embodiment, optionally, the cavity 30 comprises an opening 60, the flexible light-emitting device 40 in the cavity 30 is electrically connected with a connecting line 61, the connecting line 61 passes through the opening 60 and is connected with an external circuit 62.

[0050] Specifically, the opening 60 can be arranged on the side wall 63 of the cavity 30, or can be arranged on the flexible substrate 10. The external circuit 62 is used to provide a driving signal for the flexible light-emitting device 40, and drive the flexible light-emitting device 40 to emit light. The external circuit 62 can be bonded on the flexible substrate 10.

[0051] On the basis of the above embodiment, optionally, the cavity 30 comprises a side wall 63, the side wall 63 is located between the flexible substrate 10 and the flexible light-transmitting layer 20, and the opening 60 is arranged on the side wall 63 of the cavity 30.

[0052] Specifically, by arranging the opening 60 on the side wall 63, the structure of the flexible substrate 10 and the flexible light-transmitting layer 20 is not damaged, the stress on the flexible substrate 10 and the flexible light-transmitting layer 20 is more uniform when the light-emitting device is bent, and the flexible light-emitting device 40 can be further prevented from being damaged by excessive stress.

[0053] On the basis of the above embodiment, optionally, the light transmittance of the flexible light-transmitting layer 20 is greater than or equal to 10%.

[0054] Specifically, the flexible light-transmitting layer 20 is a key component of the light-emitting device, and its light transmittance directly affects the light-emitting efficiency and brightness of the whole device. By setting the light transmittance of the flexible light-transmitting layer 20 to be greater than or equal to 10%, more light can be emitted from the flexible light-transmitting layer 20, thereby improving the light-emitting efficiency of the light-emitting device. For example, the light transmittance of the flexible light-transmitting layer 20 can be 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, etc.

[0055] On the basis of the above embodiment, optionally, the material of the flexible light-transmitting layer 20 is rubber, resin or cloth.

[0056] The material of the flexible substrate 10 is cloth, plastic or rubber.

[0057] Specifically, rubber, resin and cloth all have high flexibility and high light transmittance. By setting the material of the flexible light-transmitting layer 20 to be rubber, resin or cloth, the stress on the light-emitting device and the stress on the flexible light-emitting device 40 can be reduced, and the light-emitting device has high light transmittance. Cloth, plastic and rubber have high flexibility and certain supporting performance. By setting the material of the flexible substrate 10 to be cloth, plastic or rubber, the stress on the light-emitting device and the stress on the flexible light-emitting device 40 can be reduced.

[0058] On the basis of the above-mentioned embodiments, optionally, the flexible light-emitting device 40 comprises an OLED light-emitting device, an LED light-emitting device, a perovskite LED light-emitting device, a QLED light-emitting device, a miniled light-emitting device or a microled light-emitting device.

[0059] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, the steps described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which are not limited herein.

[0060] The above specific embodiments do not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A light emitting device, characterized by, The application relates to a flexible light-emitting device, comprising: a flexible substrate and a flexible light-transmitting layer oppositely arranged, at least one cavity being arranged between the flexible substrate and the flexible light-transmitting layer, and a flexible light-emitting device being arranged in the cavity; the flexible light-emitting device is movable in the cavity; the distance between the edge of the vertical projection of the flexible substrate and the edge of the vertical projection of the flexible light-emitting device is greater than 0, and the thickness of the cavity is greater than or equal to the thickness of the flexible light-emitting device in the direction of the flexible substrate pointing to the flexible light-transmitting layer.

2. The light-emitting device according to claim 1, wherein: the distance between the edge of the vertical projection of the flexible substrate and the edge of the vertical projection of the flexible light-emitting device is greater than or equal to 0.2 mm; and the thickness of the cavity is greater than the thickness of the flexible light-emitting device and less than or equal to 10 times the thickness of the flexible light-emitting device.

3. The light-emitting device according to claim 1, wherein: a bonding layer is arranged between the flexible substrate and the flexible light-transmitting layer, and the bonding layer separates the space between the flexible substrate and the flexible light-transmitting layer into multiple cavities; or the flexible substrate and the flexible light-transmitting layer are connected through a buckle structure, and the buckle structure separates the space between the flexible substrate and the flexible light-transmitting layer into multiple cavities; or the flexible substrate and the flexible light-transmitting layer are connected through a sewing structure, and the sewing structure separates the space between the flexible substrate and the flexible light-transmitting layer into multiple cavities.

4. The light-emitting device according to claim 1, wherein: the shape of the vertical projection of the cavity is the same as the shape of the vertical projection of the flexible light-emitting device arranged in the cavity.

5. The light-emitting device according to claim 1, wherein: the shape of the vertical projection of the cavity comprises at least one of a polygon, a circle, an ellipse, a semicircle, a semi-ellipse and a sector.

6. The light-emitting device according to claim 1, wherein: the cavity comprises an opening, the flexible light-emitting device arranged in the cavity is electrically connected with a connecting line, and the connecting line is connected with an external circuit through the opening.

7. The light-emitting device according to claim 6, wherein: the cavity comprises a side wall between the flexible substrate and the flexible light-transmitting layer, and the opening is arranged on the side wall of the cavity.

8. The light-emitting device according to claim 1, wherein: the light transmittance of the flexible light-transmitting layer is greater than or equal to 10%.

9. The light-emitting device according to claim 1, wherein: the material of the flexible light-transmitting layer is rubber, resin or cloth; and the material of the flexible substrate is cloth, plastic or rubber.

10. The light-emitting device according to claim 1, wherein: the flexible light-emitting device comprises an OLED light-emitting device, an LED light-emitting device, a perovskite LED light-emitting device, a QLED light-emitting device, a miniled light-emitting device or a microled light-emitting device. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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