Display device and working method thereof

Abstract

The invention provides a display device and a working method thereof, and belongs to the technical field of display. The display device comprises a first transparent substrate and a second transparent substrate which are oppositely arranged; the transparent OLED display device and the light-transmitting elastic layer are located between the first transparent substrate and the second transparent substrate; the driving assembly is used for driving the first transparent substrate and / or the second transparent substrate to move and adjusting the distance between the first transparent substrate and the second transparent substrate; the control unit is used for controlling the driving assembly to drive the first transparent substrate and / or the second transparent substrate to move; the light-transmitting elastic layer is located on the non-light-emitting side of the transparent OLED display device, and the refractive index of the light-transmitting elastic layer changes along with the stretching state or the compression state of the light-transmitting elastic layer. The display brightness of the display device to human eyes can be improved, and the display effect is enhanced.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display device and a working method thereof. Background Art

[0002] Augmented reality (AR) technology is widely used in various industries because of its unique visual effect of effectively superimposing virtual images on real scenes. It is an important direction for future technological development. Since AR devices can effectively deliver the virtual world to the observer, research in the field of AR has been focused on the development of various types of near-eye displays, and most of the current research focuses on head-mounted displays (HMD). As consumers' expectations for AR displays increase, developing compact and lightweight HMDs with optical transparency and maintaining high-quality image performance remains a daunting task.

[0003] Existing HMDs mainly include microdisplays, eyepieces, and optical combination elements, among which the optical combination elements play a very important role in the overall optical performance and compactness of AR glasses. Several existing technologies for optical combination elements, such as planar beam splitters, curved or free-form surfaces with beam splitter coatings, geometric array optical waveguides, and holographic waveguides, all require complex optical modules, which are not conducive to miniaturization and lightweight application requirements. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a display device and a working method thereof, which can realize a miniaturized and lightweight display device, improve the display brightness of the display device to the human eye, and enhance the display effect.

[0005] To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0006] In one aspect, a display device is provided, comprising:

[0007] A first transparent substrate and a second transparent substrate arranged opposite to each other;

[0008] A transparent OLED display device and a light-transmitting elastic layer located between the first transparent substrate and the second transparent substrate;

[0009] A driving component, used for driving the first transparent substrate and / or the second transparent substrate to move, and adjusting the distance between the first transparent substrate and the second transparent substrate;

[0010] A control unit, used for controlling the driving component to drive the first transparent substrate and / or the second transparent substrate to move;

[0011] In which, the light-transmitting elastic layer is located on the non-light-emitting side of the transparent OLED display device, and the refractive index of the light-transmitting elastic layer changes with the tensile state or the compression state of the light-transmitting elastic layer. When the distance between the first transparent substrate and the second transparent substrate is greater than a preset value, the light-transmitting elastic layer is stretched, and when the distance between the first transparent substrate and the second transparent substrate is less than the preset value, the light-transmitting elastic layer is compressed.

[0012] In some embodiments, the light-transmitting elastic layer is located between the second transparent substrate and the transparent OLED display device, and the display device further includes:

[0013] a first bonding layer disposed between the second transparent substrate and the light-transmitting elastic layer;

[0014] A second adhesive layer is located between the transparent OLED display device and the light-transmitting elastic layer.

[0015] In some embodiments, the drive assembly includes a first drive motor and a second drive motor:

[0016] The first driving motor is connected to the first end of the first transparent substrate and the first end of the second transparent substrate respectively;

[0017] The second driving motor is connected to the second end of the first transparent substrate and the second end of the second transparent substrate respectively.

[0018] In some embodiments, the thickness of the light-transmitting elastic layer is 0.5-1 mm.

[0019] In some embodiments, the refractive index of the transparent OLED display device is n1, and the refractive index of the light-transmitting elastic layer varies within a range of greater than n1 and less than n1.

[0020] In some embodiments, the light-transmitting elastic layer is made of polydimethylsiloxane (PDMS). When the light-transmitting elastic layer is in the stretched state, the refractive index of the light-transmitting elastic layer decreases; when the light-transmitting elastic layer is in the compressed state, the refractive index of the light-transmitting elastic layer increases.

[0021] An embodiment of the present invention further provides a working method of a display device, which is applied to the display device as described above, and the working method includes:

[0022] The control unit controls the driving component to drive the first transparent substrate and / or the second transparent substrate to move, and adjusts the distance between the first transparent substrate and the second transparent substrate so that the light-transmitting elastic layer is in a stretched state or a compressed state to adjust the refractive index of the light-transmitting elastic layer.

[0023] In some embodiments, controlling the driving component by the control unit to drive the first transparent substrate and / or the second transparent substrate to move includes:

[0024] Control the first driving motor to drive the first end of the first transparent substrate and the first end of the second transparent substrate to move toward each other, and control the second driving motor to drive the second end of the first transparent substrate and the second end of the second transparent substrate to move toward each other, so as to reduce the distance between the first transparent substrate and the second transparent substrate; or

[0025] The first driving motor is controlled to drive the first end of the first transparent substrate and the first end of the second transparent substrate to move away from each other, and the second driving motor is controlled to drive the second end of the first transparent substrate and the second end of the second transparent substrate to move away from each other, so as to increase the distance between the first transparent substrate and the second transparent substrate.

[0026] In some embodiments, the light-transmitting elastic layer is made of polydimethylsiloxane (PDMS). When the light-transmitting elastic layer is in the stretched state, the refractive index of the light-transmitting elastic layer decreases; when the light-transmitting elastic layer is in the compressed state, the refractive index of the light-transmitting elastic layer increases.

[0027] In some embodiments, the light-transmitting elastic layer is located between the first transparent substrate and the transparent OLED display device, and the working method specifically includes:

[0028] When the display device is in a working state, the distance between the first transparent substrate and the second transparent substrate is controlled to be greater than a preset value, so that the light-transmitting elastic layer is in a stretched state, and the refractive index of the light-transmitting elastic layer is less than the refractive index of the first transparent substrate; when the display device is not in a working state, the distance between the first transparent substrate and the second transparent substrate is controlled to be less than a preset value, so that the light-transmitting elastic layer is in a compressed state, and the refractive index of the light-transmitting elastic layer is greater than or equal to the refractive index of the first transparent substrate.

[0029] The embodiments of the present invention have the following beneficial effects:

[0030] In the above scheme, the display device of the display device adopts a transparent OLED display device, which can be directly integrated in front of the human eye, and the generated virtual image is directly received by the human eye without the need for transmission through a complex optical system, which can realize a miniaturized and lightweight display device, and can also avoid the problems of virtual image distortion, dispersion, and small field of view. In addition, a light-transmitting elastic layer is added to the non-light-emitting side of the transparent OLED display device, and the refractive index of the light-transmitting elastic layer changes with the tensile state or compression state of the light-transmitting elastic layer. In this way, when the transparent OLED display device is working, the state of the light-transmitting elastic layer can be controlled to make the refractive index of the light-transmitting elastic layer smaller. Due to the principle of total reflection, the backlight generated by the transparent OLED display device can be fully reflected back to the light-emitting layer, further increasing the light intensity of the forward light of the transparent OLED display device, thereby improving the display brightness of the display device to the human eye and enhancing the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of a display device according to an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of adjusting the h value according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic structural diagram of an OLED display device according to an embodiment of the present invention;

[0034] Figure 4 A schematic diagram of a backlight beam generated by a light-emitting layer according to an embodiment of the present invention directly passing through a cathode layer and dissipating in an external environment;

[0035] Figure 5 This is a schematic diagram showing that after the light generated by the light-emitting layer reaches the PDMS layer, a portion of the light is totally reflected back to the light-emitting layer according to an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the backlight generated by the OLED display device according to an embodiment of the present invention being substantially totally reflected and converted into forward light;

[0037] Figure 7 This is a schematic diagram of the human eye normally receiving ambient light when the OLED display device according to the embodiment of the present invention is not working.

[0038] Reference numerals

[0039] 1-1 First transparent substrate

[0040] 1-2 Second transparent substrate

[0041] 2 Transparent OLED display devices

[0042] 3 External environment

[0043] 4-1 Left Eye

[0044] 4-2 Right Eye

[0045] 5-1 First drive motor

[0046] 5-2 Second drive motor

[0047] 6-1 First control unit

[0048] 6-2 Second Control Unit

[0049] 201 substrate

[0050] 202 driving circuit layer

[0051] 203 Anode layer

[0052] 204 Hole transport layer

[0053] 205 Luminous Layer

[0054] 206 Electron Transport Layer

[0055] 207 cathode layer

[0056] 208 PDMS layer

[0057] 209 pixel units

[0058] 209-1 Red sub-pixel

[0059] 209-2 Green sub-pixel

[0060] 209-3 Blue sub-pixel DETAILED DESCRIPTION

[0061] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0062] In existing near-eye display systems, microdisplays are generally set on the side of the human eye, and virtual images enter the human eye through optical devices such as optical waveguides, free-form prisms, and Birdbaths. On the one hand, high precision requirements are placed on optical devices, which makes the entire system structure complex and increases costs. In addition, there are problems such as distortion, dispersion, and small field of view (FOV) during the transmission of virtual images.

[0063] The embodiments of the present invention provide a display device and a working method thereof, which can realize a miniaturized and lightweight display device, improve the display brightness of the display device to human eyes, and enhance the display effect.

[0064] An embodiment of the present invention provides a display device, comprising:

[0065] A first transparent substrate and a second transparent substrate arranged opposite to each other;

[0066] a transparent organic light emitting diode (OLED) display device and a light-transmitting elastic layer located between the first transparent substrate and the second transparent substrate;

[0067] A driving component, used for driving the first transparent substrate and / or the second transparent substrate to move, and adjusting the distance between the first transparent substrate and the second transparent substrate;

[0068] A control unit, used for controlling the driving component to drive the first transparent substrate and / or the second transparent substrate to move;

[0069] In which, the light-transmitting elastic layer is located on the non-light-emitting side of the transparent OLED display device, and the refractive index of the light-transmitting elastic layer changes with the tensile state or the compression state of the light-transmitting elastic layer. When the distance between the first transparent substrate and the second transparent substrate is greater than a preset value, the light-transmitting elastic layer is stretched, and when the distance between the first transparent substrate and the second transparent substrate is less than the preset value, the light-transmitting elastic layer is compressed.

[0070] The display device of this embodiment may be an AR display device.

[0071] In this embodiment, the display device of the display device adopts a transparent OLED display device. The OLED display device has outstanding advantages such as low power consumption, light weight, wide color gamut, fast response time, and high contrast. The transparent OLED display device is easy to integrate with an oxide or organic thin film transistor drive circuit and can be used for an active matrix transparent display with a high aperture ratio. The OLED display device is usually composed of a multilayer organic semiconductor material, and the design of its functional layer is simple and has an ultra-thin thickness. The light-emitting layer can select an organic semiconductor material that only absorbs ultraviolet rays, thereby showing high transparency, which makes it advantageous in the field of transparent display.

[0072] The transparent OLED display device of this embodiment can be directly integrated in front of the human eye, and the generated virtual image is directly received by the human eye without the need for transmission through a complex optical system. It can realize a miniaturized and lightweight display device, and can also avoid the problems of virtual image distortion, dispersion, and small field of view. In addition, a light-transmitting elastic layer is added to the non-light-emitting side of the transparent OLED display device, and the refractive index of the light-transmitting elastic layer changes with the stretched state or compressed state of the light-transmitting elastic layer. In this way, when the transparent OLED display device is working, the state of the light-transmitting elastic layer can be controlled to make the refractive index of the light-transmitting elastic layer smaller. Due to the principle of total reflection, the backlight generated by the transparent OLED display device can be fully reflected back to the light-emitting layer, further increasing the light intensity of the forward light of the transparent OLED display device, thereby improving the display brightness of the display device to the human eye and enhancing the display effect.

[0073] In this embodiment, the light-transmitting elastic layer can be made of polydimethylsiloxane (PDMS), which is a polymer material with special properties. It can show a special optical effect, namely, the PDMS light-elastic effect. This effect refers to the phenomenon that when an external force acts on the PDMS material, the material deforms and changes optically. The light-elastic effect of PDMS is caused by its special structure and physical properties. When an external force is applied to PDMS, its molecular chain will be stretched or compressed, thereby changing the volume and shape of the PDMS material, thereby affecting its refractive index. In this embodiment, when the light-transmitting elastic layer is in the stretched state, the refractive index of the light-transmitting elastic layer decreases; when the light-transmitting elastic layer is in the compressed state, the refractive index of the light-transmitting elastic layer increases. In this way, when the refractive index of the light-transmitting elastic layer needs to be increased, the distance between the first transparent substrate and the second transparent substrate can be increased to control the light-transmitting elastic layer to be in a stretched state; when the refractive index of the light-transmitting elastic layer needs to be reduced, the distance between the first transparent substrate and the second transparent substrate can be reduced to control the light-transmitting elastic layer to be in a compressed state.

[0074] Figure 1 Schematic diagram of the structure of the display device according to an embodiment of the present invention. Figure 1 As shown, the display device includes a first transparent substrate 1-1 and a second transparent substrate 1-2 arranged opposite to each other, and a transparent OLED display device 2 located between the first transparent substrate 1-1 and the second transparent substrate 1-2. The first transparent substrate 1-1 and the second transparent substrate 1-2 can be made of transparent glass or composite materials, preferably materials with high elastic modulus; the display device also includes a driving component, the driving component includes a first driving motor 5-1 and a second driving motor 5-2, the first driving motor 5-1 is respectively connected to the first end of the first transparent substrate 1-1 and the first end of the second transparent substrate 1-2; the second driving motor 5-2 is respectively connected to the second end of the first transparent substrate 1-1 and the second end of the second transparent substrate 1-2; the control unit includes a first control unit 6-1 and a second control unit 6-2, the working state of the first driving motor 5-1 can be controlled by the first control unit 6-1, and the working state of the second driving motor 5-2 can be controlled by the second control unit 6-2.

[0075] When the user wears the display device, the light emitted by the transparent OLED display device 2 is incident on the human eye (including the left eye 4-1 and the right eye 4-2) through the first transparent substrate 1-1. Since the transparent OLED display device 2, the first transparent substrate 1-1 and the second transparent substrate 1-2 are all transparent, the light emitted by the external environment 3 can also be incident on the human eye, thereby realizing the superposition of the virtual image on the real scene. In this embodiment, the transparent OLED display device 2 is directly integrated in front of the human eye, and the generated virtual image is directly received by the human eye without the need for transmission through a complex optical system, which can realize a miniaturized and lightweight display device, and can also avoid the problems of virtual image distortion, dispersion, and small field of view.

[0076] like Figure 2 As shown, the h value is the distance between the first transparent substrate 1-1 and the second transparent substrate 1-2. When the first drive motor 5-1 and the second drive motor 5-2 are working, the h value will change. When the h value is greater than a preset value, the light-transmitting elastic layer is stretched, and when the h value is less than the preset value, the light-transmitting elastic layer is compressed. The preset value is determined according to the thickness of the transparent OLED display device and the light-transmitting elastic layer. When the h value is equal to the preset value, the light-transmitting elastic layer is neither stretched nor compressed.

[0077] In this embodiment, the light-transmitting elastic layer is located between the second transparent substrate 1-2 and the transparent OLED display device 2, and the display device further includes:

[0078] a first bonding layer located between the second transparent substrate 1-2 and the light-transmitting elastic layer;

[0079] A second adhesive layer is located between the transparent OLED display device 2 and the light-transmitting elastic layer.

[0080] The light-transmitting elastic layer can be fixed between the second transparent substrate 1-2 and the transparent OLED display device 2 by the first adhesive layer and the second adhesive layer. When the h value increases, the light-transmitting elastic layer can be stretched by the tensile force of the second transparent substrate 1-2 and the transparent OLED display device 2, and the refractive index changes accordingly; when the h value decreases, the light-transmitting elastic layer can be compressed by the pressure of the second transparent substrate 1-2 and the transparent OLED display device 2, and the refractive index changes accordingly.

[0081] In some embodiments, the thickness of the light-transmitting elastic layer is 0.5-1 mm. When the thickness of the light-transmitting elastic layer adopts the above value, on the one hand, it can ensure that the refractive index change of the light-transmitting elastic layer meets the requirements, and on the other hand, it can ensure the miniaturization and lightweight of the display device.

[0082] Figure 3 FIG. 1 is a schematic diagram of the structure of an OLED display device according to an embodiment of the present invention. Figure 3 As shown, the OLED display device includes a substrate 201, a driving circuit layer 202, an anode layer 203, a hole transport layer 204, a light-emitting layer 205, an electron transport layer 206, a cathode layer 207, and a PDMS layer 208. The OLED display device includes a plurality of pixel units 209. In one embodiment, each pixel unit 209 includes a red sub-pixel 209-1, a green sub-pixel 209-2, and a blue sub-pixel 209-3. In this embodiment, the anode layer 203 is made of a light-transmitting material, and the light emitted by the light-emitting layer 205 passes through the anode layer 203, the substrate 201 and the driving circuit layer 202 to enter the human eye. The PDMS layer 208 is arranged on the non-light-emitting side of the OLED display device.

[0083] The cathode layer 207 of the transparent OLED display device 2 is made of a transparent material (such as ITO). When the refractive index of the PDMS layer 208 is relatively large and greater than the refractive index of the transparent OLED display device 2, such as Figure 4 As shown, when the backlight beam (OLED light in the figure) generated by the light-emitting layer 205 irradiates the junction between the cathode layer 207 and the PDMS layer 208, the incident angle β1 is smaller than the refraction angle α1, and the backlight beam will directly pass through the cathode layer 207 and the PDMS layer 208 and dissipate in the external environment. In order to improve the utilization of this part of light energy, the PDMS layer 208 is manufactured above the cathode layer 207 in this embodiment. The refractive index of the transparent OLED display device 2 is n1, and the refractive index of the PDMS layer 208 can vary within the range of greater than n1 and less than n1. When the PDMS layer 208 is in a compressed state, the refractive index is greater than the refractive index n1 of the transparent OLED display device 2; when the PDMS layer 208 is in a stretched state, the refractive index is less than the refractive index n1 of the transparent OLED display device 2. As Figure 5 As shown, when the transparent OLED display device 2 is working, the control unit issues an instruction to make the driving motor work, driving the first transparent substrate 1-1 and the second transparent substrate 1-2 to move, so that the distance between the two increases, the h value becomes larger, the PDMS layer 208 is stretched so that its light refractive index becomes smaller, and the PDMS layer 208 is transformed from a light-dense medium to a light-sparse medium. After a part of the OLED light generated by the light-emitting layer reaches the PDMS layer 208, it is totally reflected, and a part of the light will be totally reflected back to the light-emitting layer (the incident angle β1 is equal to the reflection angle β2), thereby increasing the light intensity of the forward light beam, further improving the display brightness of the display to the human eye, and enhancing the display effect.

[0084] like Figure 6 As shown, when the light refractive index of the PDMS layer 208 is small enough, the backlight generated by the transparent OLED display device 2 is basically totally reflected and converted into forward light, and the display brightness of the corresponding transparent OLED display device 2 is the highest. Figure 1 and Figure 6As shown, the human eye can observe the external environment scene and the virtual image at the same time, thereby realizing the augmented reality display function.

[0085] like Figure 7 As shown, when the transparent OLED display device 2 is not working, the control unit issues a command to operate the drive motor, driving the first transparent substrate 1-1 and the second transparent substrate 1-2 to move, so that the distance between the two is reduced, the h value becomes smaller, the PDMS layer 208 is compressed so that its light refractive index becomes larger, and the backlight beam generated by the light-emitting layer 205 (OLED light in the figure) will directly pass through the second transparent substrate 1-2 and dissipate in the external environment, and the human eye can also receive the external ambient light normally.

[0086] An embodiment of the present invention further provides a working method of a display device, which is applied to the display device as described above, and the working method includes:

[0087] The control unit controls the driving component to drive the first transparent substrate and / or the second transparent substrate to move, and adjusts the distance between the first transparent substrate and the second transparent substrate so that the light-transmitting elastic layer is in a stretched state or a compressed state to adjust the refractive index of the light-transmitting elastic layer.

[0088] In this embodiment, the display device of the display device adopts a transparent OLED display device, which can be directly integrated in front of the human eye, and the generated virtual image is directly received by the human eye without the need for transmission through a complex optical system, which can realize a miniaturized and lightweight display device, and can also avoid the problems of virtual image distortion, dispersion, and small field of view. In addition, a light-transmitting elastic layer is added to the non-light-emitting side of the transparent OLED display device, and the refractive index of the light-transmitting elastic layer changes with the tensile state or compression state of the light-transmitting elastic layer. In this way, when the transparent OLED display device is working, the state of the light-transmitting elastic layer can be controlled to make the refractive index of the light-transmitting elastic layer smaller. Due to the principle of total reflection, the backlight generated by the transparent OLED display device can be fully reflected back to the light-emitting layer, further increasing the light intensity of the forward light of the transparent OLED display device, thereby improving the display brightness of the display device to the human eye and enhancing the display effect.

[0089] In some embodiments, the driving assembly includes a first driving motor 5-1 and a second driving motor 5-2, wherein the first driving motor 5-1 is connected to the first end of the first transparent substrate 1-1 and the first end of the second transparent substrate 1-2 respectively; the second driving motor 5-2 is connected to the second end of the first transparent substrate 1-1 and the second end of the second transparent substrate 1-2 respectively; the control unit includes a first control unit 6-1 and a second control unit 6-2, and the working state of the first driving motor 5-1 can be controlled by the first control unit 6-1, and the working state of the second driving motor 5-2 can be controlled by the second control unit 6-2. The control of the driving assembly to drive the first transparent substrate and / or the second transparent substrate to move by the control unit includes:

[0090] Control the first driving motor to drive the first end of the first transparent substrate and the first end of the second transparent substrate to move toward each other, and control the second driving motor to drive the second end of the first transparent substrate and the second end of the second transparent substrate to move toward each other, so as to reduce the distance between the first transparent substrate and the second transparent substrate; or

[0091] The first driving motor is controlled to drive the first end of the first transparent substrate and the first end of the second transparent substrate to move away from each other, and the second driving motor is controlled to drive the second end of the first transparent substrate and the second end of the second transparent substrate to move away from each other, so as to increase the distance between the first transparent substrate and the second transparent substrate.

[0092] In this embodiment, the light-transmitting elastic layer can be made of polydimethylsiloxane (PDMS), which is a polymer material with special properties. It can show a special optical effect, namely, the PDMS light-elastic effect. This effect refers to the phenomenon that when an external force acts on the PDMS material, the material deforms and changes optically. The light-elastic effect of PDMS is caused by its special structure and physical properties. When an external force is applied to PDMS, its molecular chain will be stretched or compressed, thereby changing the volume and shape of the PDMS material, thereby affecting its refractive index. In this embodiment, when the light-transmitting elastic layer is in the stretched state, the refractive index of the light-transmitting elastic layer decreases; when the light-transmitting elastic layer is in the compressed state, the refractive index of the light-transmitting elastic layer increases. In this way, when the refractive index of the light-transmitting elastic layer needs to be increased, the distance between the first transparent substrate and the second transparent substrate can be increased to control the light-transmitting elastic layer to be in a stretched state; when the refractive index of the light-transmitting elastic layer needs to be reduced, the distance between the first transparent substrate and the second transparent substrate can be reduced to control the light-transmitting elastic layer to be in a compressed state.

[0093] In some embodiments, the light-transmitting elastic layer is located between the first transparent substrate and the transparent OLED display device, and the working method specifically includes:

[0094] When the display device is in a working state, the distance between the first transparent substrate and the second transparent substrate is controlled to be greater than a preset value, so that the light-transmitting elastic layer is in a stretched state, and the refractive index of the light-transmitting elastic layer is less than the refractive index of the first transparent substrate; when the display device is not in a working state, the distance between the first transparent substrate and the second transparent substrate is controlled to be less than a preset value, so that the light-transmitting elastic layer is in a compressed state, and the refractive index of the light-transmitting elastic layer is greater than or equal to the refractive index of the first transparent substrate.

[0095] like Figure 2 As shown, the h value is the distance between the first transparent substrate 1-1 and the second transparent substrate 1-2. When the first drive motor 5-1 and the second drive motor 5-2 are working, the h value will change. When the h value is greater than a preset value, the light-transmitting elastic layer is stretched, and when the h value is less than the preset value, the light-transmitting elastic layer is compressed. The preset value is determined according to the thickness of the transparent OLED display device and the light-transmitting elastic layer. When the h value is equal to the preset value, the light-transmitting elastic layer is neither stretched nor compressed.

[0096] The refractive index of the transparent OLED display device 2 is n1, and the refractive index of the PDMS layer 208 can vary within a range greater than n1 and less than n1. When the PDMS layer 208 is in a compressed state, the refractive index is greater than the refractive index n1 of the transparent OLED display device 2; when the PDMS layer 208 is in a stretched state, the refractive index is less than the refractive index n1 of the transparent OLED display device 2. When the refractive index of the PDMS layer 208 is relatively large and greater than the refractive index of the transparent OLED display device 2, such as Figure 4 As shown, when the backlight beam (OLED light in the figure) generated by the light-emitting layer 205 irradiates the junction between the cathode layer 207 and the PDMS layer 208, the incident angle β1 is smaller than the refraction angle α1, and the backlight beam directly passes through the cathode layer 207 and the PDMS layer 208 and dissipates in the external environment. Figure 5 As shown, when the transparent OLED display device 2 is working, the control unit issues an instruction to make the driving motor work, driving the first transparent substrate 1-1 and the second transparent substrate 1-2 to move, so that the distance between the two increases, the h value becomes larger, the PDMS layer 208 is stretched so that its light refractive index becomes smaller, and the PDMS layer 208 is transformed from a light-dense medium to a light-sparse medium. After a part of the OLED light generated by the light-emitting layer reaches the PDMS layer 208, it is totally reflected, and a part of the light will be totally reflected back to the light-emitting layer (the incident angle β1 is equal to the reflection angle β2), thereby increasing the light intensity of the forward light beam, further improving the display brightness of the display to the human eye, and enhancing the display effect.

[0097] like Figure 6 As shown, when the light refractive index of the PDMS layer 208 is small enough, the backlight generated by the transparent OLED display device 2 is basically totally reflected and converted into forward light, and the display brightness of the corresponding transparent OLED display device 2 is the highest. Figure 1 and Figure 6 As shown, the human eye can observe the external environment scene and the virtual image at the same time, thereby realizing the augmented reality display function.

[0098] like Figure 7 As shown, when the transparent OLED display device 2 is not working, the control unit issues a command to operate the drive motor, driving the first transparent substrate 1-1 and the second transparent substrate 1-2 to move, so that the distance between the two is reduced, the h value becomes smaller, the PDMS layer 208 is compressed so that its light refractive index becomes larger, and the backlight beam generated by the light-emitting layer 205 (OLED light in the figure) will directly pass through the second transparent substrate 1-2 and dissipate in the external environment, and the human eye can also receive the external ambient light normally.

[0099] It should be noted that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments, since they are basically similar to the product embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the product embodiments.

[0100] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0101] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “under” another element, it can be “directly on” or “under” the other element or intervening elements may be present.

[0102] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0103] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A display device, characterized in that: include: A first transparent substrate and a second transparent substrate arranged opposite to each other; A transparent OLED display device and a light-transmitting elastic layer located between the first transparent substrate and the second transparent substrate; A driving component, used for driving the first transparent substrate and / or the second transparent substrate to move, and adjusting the distance between the first transparent substrate and the second transparent substrate; A control unit, used for controlling the driving component to drive the first transparent substrate and / or the second transparent substrate to move; In which, the light-transmitting elastic layer is located on the non-light-emitting side of the transparent OLED display device, and the refractive index of the light-transmitting elastic layer changes with the tensile state or the compression state of the light-transmitting elastic layer. When the distance between the first transparent substrate and the second transparent substrate is greater than a preset value, the light-transmitting elastic layer is stretched, and when the distance between the first transparent substrate and the second transparent substrate is less than the preset value, the light-transmitting elastic layer is compressed.

2. The display device according to claim 1, characterized in that The light-transmitting elastic layer is located between the second transparent substrate and the transparent OLED display device, and the display device further includes: a first bonding layer disposed between the second transparent substrate and the light-transmitting elastic layer; A second adhesive layer is located between the transparent OLED display device and the light-transmitting elastic layer.

3. The display device according to claim 1, characterized in that The drive assembly includes a first drive motor and a second drive motor: The first driving motor is connected to the first end of the first transparent substrate and the first end of the second transparent substrate respectively; The second driving motor is connected to the second end of the first transparent substrate and the second end of the second transparent substrate respectively.

4. The display device according to claim 1, characterized in that The thickness of the light-transmitting elastic layer is 0.5-1 mm.

5. The display device according to claim 2, characterized in that: The refractive index of the transparent OLED display device is n1, and the refractive index of the light-transmitting elastic layer varies within a range of greater than n1 and less than n1.

6. The display device according to claim 1, characterized in that: The light-transmitting elastic layer is made of polydimethylsiloxane (PDMS). When the light-transmitting elastic layer is in the stretched state, the refractive index of the light-transmitting elastic layer decreases; when the light-transmitting elastic layer is in the compressed state, the refractive index of the light-transmitting elastic layer increases.

7. A method for operating a display device, characterized in that: Applied to the display device according to any one of claims 1 to 6, the working method comprises: The control unit controls the driving component to drive the first transparent substrate and / or the second transparent substrate to move, and adjusts the distance between the first transparent substrate and the second transparent substrate so that the light-transmitting elastic layer is in a stretched state or a compressed state to adjust the refractive index of the light-transmitting elastic layer.

8. The operating method of the display device according to claim 7, characterized in that: Applied to the display device according to claim 3, the controlling unit controlling the driving component to drive the first transparent substrate and / or the second transparent substrate to move comprises: Control the first driving motor to drive the first end of the first transparent substrate and the first end of the second transparent substrate to move toward each other, and control the second driving motor to drive the second end of the first transparent substrate and the second end of the second transparent substrate to move toward each other, so as to reduce the distance between the first transparent substrate and the second transparent substrate; or The first driving motor is controlled to drive the first end of the first transparent substrate and the first end of the second transparent substrate to move away from each other, and the second driving motor is controlled to drive the second end of the first transparent substrate and the second end of the second transparent substrate to move away from each other, so as to increase the distance between the first transparent substrate and the second transparent substrate.

9. The operating method of the display device according to claim 7, characterized in that: The light-transmitting elastic layer is made of polydimethylsiloxane (PDMS). When the light-transmitting elastic layer is in the stretched state, the refractive index of the light-transmitting elastic layer decreases; when the light-transmitting elastic layer is in the compressed state, the refractive index of the light-transmitting elastic layer increases.

10. The operating method of the display device according to claim 9, characterized in that: The light-transmitting elastic layer is located between the first transparent substrate and the transparent OLED display device, and the working method specifically includes: When the display device is in a working state, the distance between the first transparent substrate and the second transparent substrate is controlled to be greater than a preset value, so that the light-transmitting elastic layer is in a stretched state, and the refractive index of the light-transmitting elastic layer is less than the refractive index of the first transparent substrate; when the display device is not in a working state, the distance between the first transparent substrate and the second transparent substrate is controlled to be less than a preset value, so that the light-transmitting elastic layer is in a compressed state, and the refractive index of the light-transmitting elastic layer is greater than or equal to the refractive index of the first transparent substrate.

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