CN111326662A - Stretchable substrate, preparation method thereof and stretchable display device - Google Patents
Stretchable substrate, preparation method thereof and stretchable display device Download PDFInfo
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- CN111326662A CN111326662A CN201811534292.1A CN201811534292A CN111326662A CN 111326662 A CN111326662 A CN 111326662A CN 201811534292 A CN201811534292 A CN 201811534292A CN 111326662 A CN111326662 A CN 111326662A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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Abstract
The embodiment of the invention discloses a stretchable substrate, a preparation method thereof and a stretchable display device. The stretchable substrate comprises a plurality of rigid islands, a wrinkle area is arranged between at least two adjacent rigid islands, and a memory alloy layer is arranged on the lower surface of the wrinkle area. According to the embodiment of the invention, the substrate can have a spring-like function, and can be restored to the original state after being stretched, so that the substrate is prevented from being broken during stretching.
Description
Technical Field
The invention relates to the technical field of display, in particular to a stretchable substrate, a preparation method thereof and a stretchable display device.
Background
With the continuous development of electronic display technology, users have increasingly demanded display devices of electronic devices, and stretchable display devices, which are one of the important development directions of display devices of electronic devices, have attracted more and more attention.
The stretchable display has the characteristic that the display can be pressed down or stretched according to the original plane shape on the premise of keeping the image quality, and the stretchable display is not only suitable for eyecatching mobile phones, but also can become a practical function of wearable display equipment such as intelligent watches, fitness trackers and the like.
The stretchable display device is manufactured on a stretchable substrate, so that a screen body can be stretched and can be attached to a curved surface or a spherical surface to bear deformation stretching in biaxial directions (an X axis and a Y axis). When the screen is stretched, there is a problem that the substrate is broken.
Disclosure of Invention
The embodiment of the invention provides a stretchable substrate, a preparation method thereof and a stretchable display device, which can prevent the substrate from being broken during stretching.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, embodiments of the present invention provide a stretchable substrate, including:
the memory alloy layer is arranged on the lower surface of the corrugated area.
According to the stretchable substrate provided by the embodiment of the invention, the fold areas and the rigid islands are distributed at intervals along the first direction parallel to the surface of the stretchable substrate.
According to the stretchable substrate provided by the embodiment of the present invention,
the wrinkled regions and the rigid islands are spaced apart along a second direction parallel to the stretchable substrate surface, the first direction being perpendicular to the second direction.
According to the stretchable substrate provided by the embodiment of the invention, the lengths of the plurality of fold regions along the first direction are the same.
According to the stretchable substrate provided by the embodiment of the invention, the lengths of the plurality of rigid islands along the first direction are the same.
According to the stretchable substrate provided by the embodiment of the invention, the longitudinal section of each fold of the fold area is a curved surface with a waveform, and the waveform in the curved surface with the waveform comprises at least one of a square waveform, a sawtooth waveform, a triangular waveform and a sine waveform.
According to the stretchable substrate provided by the embodiment of the invention, the thickness of the fold area is between 20 and 150 μm.
According to the stretchable substrate provided by the embodiment of the invention, the thickness of the memory alloy layer is between 2 and 30 μm.
According to the stretchable substrate provided by the embodiment of the invention, the material of the memory alloy layer comprises at least one of Au-Cd alloy, Cu-Zn-Al alloy, Cu-AL-Ni alloy, Ti-Ni alloy, In-Ti alloy and Ni-Al alloy.
In a second aspect, an embodiment of the present invention provides a method for preparing a stretchable substrate, including:
providing a substrate, wherein the substrate comprises a plurality of rigid islands, and a wrinkle area is arranged between at least two adjacent rigid islands;
and plating a memory alloy layer on the lower surface of the corrugated area.
In a third aspect, embodiments of the present invention provide a stretchable display device, including the stretchable substrate described above.
The stretchable substrate, the preparation method thereof and the stretchable display device are provided by the embodiment of the invention. The stretchable substrate comprises a plurality of rigid islands, and a wrinkle area is arranged between at least two adjacent rigid islands. The lower surface of the fold area is provided with an alloy memory layer. According to the embodiment of the invention, the substrate can have a spring-like function, and can be restored to the original state after being stretched, so that the substrate is prevented from being broken during stretching.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 illustrates a schematic top view of a stretchable substrate provided by one embodiment of the present invention;
FIG. 2 shows a schematic top view of a stretchable substrate provided in accordance with another embodiment of the present invention;
FIG. 3 illustrates a schematic cross-sectional view of a stretchable substrate provided by an embodiment of the present invention;
figure 4 shows an enlarged schematic view of the stretchable substrate zone B shown in figure 3.
Wherein:
100-a stretchable substrate; 10-a crumple zone; 11-memory alloy layer; 20-rigid islands.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The following description is given with reference to the orientation words as shown in the drawings, and is not intended to limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
For a better understanding of the present invention, the stretchable substrate of the embodiment of the present invention will be described in detail below with reference to fig. 1 to 4.
Referring to fig. 1 to 4 together, fig. 1 shows a schematic top view of a stretchable substrate according to an embodiment of the present invention, fig. 2 shows a schematic top view of a stretchable substrate according to another embodiment of the present invention, fig. 3 shows a schematic cross-sectional view of a stretchable base plate according to an embodiment of the present invention, and fig. 4 shows an enlarged schematic view of a stretchable substrate region B shown in fig. 3. As shown in fig. 1, fig. 2, fig. 3 and fig. 4, an embodiment of the present invention provides a stretchable substrate 100, and the stretchable display substrate 100 includes a plurality of rigid islands 20, and a wrinkle region 10 is disposed between at least two adjacent rigid islands 20. The lower surface of the corrugated area 10 is provided with an alloy memory layer 11.
As an example, a display device (not shown in the figure) may be placed on the rigid island 20, and a wire (not shown in the figure) connecting the display device may be placed on the wrinkled region 10.
The stretchable substrate 100 provided by the embodiment of the present invention includes a plurality of rigid islands 20, and a crumple zone 10 is disposed between at least two adjacent rigid islands 20. A memory alloy layer 11 is provided on the lower surface of the wrinkle region 10. Since the memory alloy can memorize a shape, the substrate 100 has a spring-like function and can be restored to an original state after being stretched, preventing the substrate from being broken when stretched.
In one embodiment of the present invention, as shown in fig. 1, the crumpled areas 10 and the rigid islands 20 are spaced apart along a first direction D1 parallel to the surface of the stretchable substrate 100, and preferably, the crumpled areas 10 and the rigid islands 20 extend to the edge of the stretchable substrate 100 along a second direction D2 perpendicular to the first direction D1.
In the present embodiment, the crumpled zones 10 and the rigid islands 20 are spaced apart, and the stretchable substrate is stretched in the direction a-a, so that a plurality of different regions of the substrate 100 have a spring-like function, and can be restored to an original state after stretching, thereby preventing the substrate from breaking during stretching.
Further, the lengths of the plurality of corrugated regions 10 in the first direction D1 are the same, and the lengths of the plurality of rigid islands 20 in the first direction D1 are the same, as shown in fig. 1, W is the length of the rigid island. The length of crumple zones 10 along first direction D1 may or may not be the same as the length of rigid islands 20 along first direction D1. Here, the lengths of the plurality of corrugated regions 10 in the first direction D1 are the same, and the lengths of the plurality of rigid islands 20 in the first direction D1 are also the same, so that the corrugated regions 10 and the rigid islands 20 are uniformly spaced, the areas of the plurality of different regions of the substrate 100 having the function of a spring are the same, and the regions generate the same restoring force when subjected to the same pulling force.
In the embodiment of the present invention, the corrugated region 10 and the rigid islands 20 are uniformly spaced apart, and the lower surface of the corrugated region 10 is plated with the memory alloy layer 11, which can memorize the shape, so that the substrate 100 has the function of a spring, and each region of the stretchable substrate 100 can generate the same restoring force when being subjected to the same pulling force. The substrate 100 can be restored to the original state after being stretched in the first direction D1, and the substrate is prevented from being broken when stretched.
In another embodiment of the present invention, as shown in fig. 2, the wrinkled regions 10 and the rigid islands 20 are spaced apart along a first direction D1 parallel to the surface of the stretchable substrate 100, and the wrinkled regions 10 and the rigid islands 20 are spaced apart along a second direction D2 parallel to the surface of the stretchable substrate, the first direction D1 being perpendicular to the second direction D2. The corrugated areas 10 and the rigid islands 20 are thus spaced apart in an array. For example, the crumple zone 10 and the rigid island 20 are both square areas, the crumple zone 10 is surrounded by the rigid island 20, and likewise, the rigid island 20 is surrounded by the crumple zone 10. The direction of folding of the folding region 10 may extend from the center point of the stretchable substrate 100 to the periphery, i.e., the direction of folding of the folding region 10 extends like an umbrella from the center point of the stretchable substrate 100 to the periphery. Of course, the crumple zones 10 may be diamond-shaped zones, parallelogram-shaped zones, circular zones, etc., projected on the surface of the stretchable substrate. For example, when the crumple zone 10 is a circular area, the rigid islands 20 may be irregularly shaped areas, the rigid islands 20 surrounding the crumple zone 10.
In the embodiment of the present invention, since the corrugated areas 10 and the rigid islands 20 are arranged in an array and spaced apart, the corrugated areas 10 are surrounded by the rigid islands 20, and the rigid islands 20 are surrounded by the corrugated areas 10. And, the direction of folding of the folding region 10 extends like an umbrella from the center point of the stretchable substrate 100 to the periphery. The substrate 100 can have a spring-like function in any direction, and can be restored to an original state after being stretched, thereby preventing the substrate from being broken when stretched.
As an example, as shown in fig. 3 or 4, a longitudinal section of the crumple zone 10 along a direction parallel to the crumpling direction is a curved surface having a wave shape. For example, as shown in fig. 1, a longitudinal section of the wrinkle region 10 along the wrinkle parallel to the first direction D1 is a curved surface having a wave shape. Alternatively, as shown in fig. 2, the longitudinal section of the pleats of the pleat zone 10 in the direction parallel to the directions D1, D2, D1 and D2 is a curved surface having a wave shape. That is, the crumple zone 10 is undulating in the direction of the crumples.
In the embodiment of the invention, the longitudinal section of the crumpled zone 10 is a curved surface with a waveform, so that the crumpled zone 10 has a spring-like function in shape, and can recover the original state after being stretched, thereby preventing the substrate from being broken during stretching.
Here, the thickness of the crumpled zone 10 may be uniform. It will be appreciated that the corrugations of the corrugated section 10 extend in a sinuous fashion, with equal thickness everywhere in the corrugation. The thickness of the corrugated region 10 is between 20 μm and 150 μm, for example 100 μm, 80 μm, etc. The thickness of the corrugated region 10 can of course also be set according to the actual requirements.
In addition, the corrugation amplitude of each corrugation zone 10 is the same, i.e. the degree of corrugation of each corrugation zone 10 is the same.
In the present embodiment, each crumple zone 10 is uniform in shape and size, and can generate the same restoring force when subjected to the same stretching force, so that the stretchable substrate is restored to the original state. Of course, the corrugated folding regions 10 with different thicknesses and different meandering degrees can be provided according to actual requirements.
It should be noted that the longitudinal cross-sectional shape of the corrugations of the corrugated area 10 can be set according to actual requirements, for example, at least one of a square waveform, a sawtooth waveform, a triangular waveform, a sinusoidal waveform, and the like is preferably adopted.
In addition, as shown in FIG. 4, the thickness of the memory alloy layer 11 may be set to be between 2 μm and 30 μm in order to make the entire substrate thin and light and convenient to use. For example, 15 μm, 20 μm, etc. The thickness of the memory alloy layer 11 can also be set according to actual requirements.
The memory alloy layer 11 may be formed of one or more of, for example, an Au-Cd alloy (herein, the Au-Cd alloy may be also referred to as a gold-cadmium alloy, hereinafter the same), a Cu-Zn alloy, a Cu-Zn-Al alloy, a Cu-AL-Ni alloy, a Ti-Ni alloy, an In-Ti alloy, a Ni-Al alloy, or the like. The memory alloy layer made of the materials has better recovery capability.
In the embodiment of the present invention, the memory alloy is plated on the wrinkled area of the substrate 100, and when the alloy is stretched, a certain restoring force is generated, so that the substrate can have a spring-like function, and can be restored to an original state after being stretched, thereby preventing the substrate from being broken during stretching.
In addition, the thickness of the stretchable substrate 100 is set in a proper range, preferably, the thickness of the stretchable substrate 100 corresponding to the rigid island 20 is set between 300 μm and 500 μm, and the total thickness of the folds of the stretchable substrate 100 corresponding to the fold areas and the alloy memory layer is not more than 180 μm, so that the support and the protection of the stretchable substrate 100 to the display panel on the stretchable substrate 100 can be ensured, the substrate is prevented from being broken during stretching, and the display effect of the display panel is maintained.
The stretchable substrate 100 provided according to an embodiment of the present invention includes a plurality of rigid islands 20, and a crumple zone 10 is disposed between at least two adjacent rigid islands 20. A memory alloy layer 11 is provided on the lower surface of the wrinkle region 10. Since the memory alloy can memorize a shape, the substrate 100 can have a spring function and be restored to an original state after being stretched, preventing the substrate from being broken when stretched.
The embodiment of the invention also provides a preparation method of the stretchable substrate, which comprises the following steps:
providing a substrate comprising a plurality of rigid islands 20, wherein a crumple zone 10 is arranged between at least two adjacent rigid islands 20;
the lower surface of the corrugated area 10 is plated with a memory alloy layer 11.
It is noted that the stretchable substrate 100 itself may be formed of an elastic material. For example, polyethylene terephthalate (PET), Polyimide (PI), and the like.
The profile of the memory alloy layer 11 can be adjusted by adjusting the temperature when the stretchable substrate is prepared. It should be noted that the more compact the shape of the memory alloy layer 11, i.e. the more the number of folds of the folded region 10, the greater the restoring force can be provided. The thinner the profile of the memory alloy layer 11, i.e., the smaller the number of wrinkles of the wrinkle region 10, the smaller the restoring force can be provided. Here, the number of pleats of the pleat zone 10 can be set according to actual requirements.
According to the method for preparing the stretchable substrate provided by the embodiment of the invention, a plurality of corrugated areas 10 are manufactured on the substrate, a metal layer is plated below the corrugated areas 10, the metal layer is made of memory alloy, the shape of the memory alloy can be adjusted through temperature, and when the substrate is stretched, the metal layer can generate the force for restoring the shape, and the substrate is restored to the original state like the restoring force of a spring. Preventing the substrate from breaking when stretched.
Embodiments of the present invention also provide a stretchable display device (not shown in the figures) including the stretchable substrate 100 described above.
As one example, the stretchable display apparatus may include a stretchable substrate 100, a device layer, and a cover plate. The device layer includes a display device and a wire connecting the display device. For example, a display device is placed on the rigid island 20 of the stretchable substrate 100, and a conductive line connecting the display device is placed on the wrinkled region 10.
When the stretchable display device is an organic light emitting diode display device, the display device may include an organic light emitting diode and a Thin Film Transistor (TFT) for driving the organic light emitting diode. The organic light emitting diode may include an anode connected to the TFT, an organic light emitting layer on the anode, and a cathode on the organic light emitting layer. In addition, an encapsulation film for preventing moisture from penetrating may cover the organic light emitting diode.
In addition, when the stretchable display device is a liquid crystal display device, the display device may include a thin film transistor TFT on the stretchable substrate 100, a pixel electrode connected to the TFT, an opposite substrate facing the stretchable substrate 100, a common electrode on the stretchable substrate 100 or the opposite substrate, and a liquid crystal layer between the stretchable substrate 100 and the opposite substrate.
The stretchable display device may be an Organic Light-Emitting Diode (OLED) display, a Micro LED display, which can be attached to the skin surface due to its thinness and stretchability, and may further include products or components having any display function, such as an OLED or Micro LED television, a digital photo frame, a mobile phone, a tablet computer, and a navigator.
According to the stretchable display device provided by the embodiment of the present invention, a plurality of wrinkle regions 10 and rigid islands 20 located at both sides of the wrinkle regions 10 are formed. The lower surface of the corrugated area 10 is plated with a memory alloy layer 11. Since the memory alloy can memorize a shape, the substrate 100 has a spring-like function and can be restored to an original state after being stretched, preventing the substrate from being broken when stretched. Thereby ensuring the stretchability and the display effect of the stretchable display device.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. Embodiments of the invention are not limited to the specific steps and structures described above and shown in the drawings. Those skilled in the art may make various changes, modifications and additions or change the order between the steps after appreciating the spirit of the embodiments of the invention. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.
Embodiments of the present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. For example, the algorithms described in the specific embodiments may be modified without departing from the basic spirit of the embodiments of the present invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the embodiments of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. The stretchable substrate is characterized by comprising a plurality of rigid islands, wherein a corrugated area is arranged between at least two adjacent rigid islands, and the lower surface of the corrugated area is provided with a memory alloy layer.
2. The stretchable substrate of claim 1, wherein the wrinkled regions and the rigid islands are spaced apart along a first direction parallel to the stretchable substrate surface.
3. The stretchable substrate of claim 2, wherein the wrinkled regions and rigid islands are spaced apart along a second direction parallel to the stretchable substrate surface, the first direction being perpendicular to the second direction.
4. The stretchable substrate of claim 2, wherein the plurality of pleated regions are the same length along the first direction.
5. The stretchable substrate of claim 2, wherein the plurality of rigid islands are the same length along the first direction.
6. A stretchable substrate according to any one of claims 1 to 5, wherein the longitudinal cross section of the wrinkled region is a curved surface having a wave shape, preferably wherein the wave shape of the curved surface having a wave shape comprises at least one of a square wave shape, a sawtooth wave shape, a triangular wave shape and a sinusoidal wave shape.
7. A stretchable substrate according to any of claims 1-5, wherein the thickness of the wrinkled region is between 20 μm and 150 μm; and/or the thickness of the memory alloy layer is between 2 and 30 microns.
8. The stretchable substrate according to any one of claims 1 to 5,
the material of the memory alloy layer comprises at least one of Au-Cd alloy, Cu-Zn-Al alloy, Cu-AL-Ni alloy, Ti-Ni alloy, In-Ti alloy and Ni-Al alloy.
9. A method of making a stretchable substrate, comprising:
providing a substrate, wherein the substrate comprises a plurality of rigid islands, and a wrinkle area is arranged between at least two adjacent rigid islands;
and plating a memory alloy layer on the lower surface of the corrugated area.
10. A stretchable display device, characterized in that the stretchable display device comprises a stretchable substrate according to any of claims 1 to 8.
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| CN112188658A (en) * | 2020-09-30 | 2021-01-05 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN112562515A (en) * | 2020-12-18 | 2021-03-26 | 云谷（固安）科技有限公司 | Stretchable display panel and display device |
| CN112614431A (en) * | 2020-12-18 | 2021-04-06 | 云谷（固安）科技有限公司 | Stretchable carrier and stretchable display panel |
| CN114028733A (en) * | 2021-12-03 | 2022-02-11 | 固安翌光科技有限公司 | OLED screen body and phototherapy device |
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| CN112562515A (en) * | 2020-12-18 | 2021-03-26 | 云谷（固安）科技有限公司 | Stretchable display panel and display device |
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