Transparent display device based on nano silver wire transparent electrode and non-polar luminescent material and application thereof

Abstract

The application discloses a transparent display device based on a nano-silver wire transparent electrode and an electrodeless luminescent material and application thereof. The device comprises a lower glass substrate, a metal wiring layer, a thin film transistor (TFT) control layer, an electrodeless luminescent phosphor layer, a nano-silver wire transparent conductive layer, an upper glass substrate and a sealing frame layer. A local alternating electric field is formed by the TFT active control structure, the electrodeless luminescent layer is driven to emit light in the corresponding area, the nano-silver wire layer provides an upper electrode and maintains high light transmittance, and large-area, transparent and controllable area display is realized. The device has the advantages of simple structure, good optical transmittance, high reliability, low power consumption and the like, and is widely applied to the fields of vehicle-mounted HUDs, augmented reality display, intelligent windows and the like.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a transparent display device, specifically a transparent display system based on a combination of a transparent conductive layer of silver nanowires and an electrodeless luminescent phosphor material, which is applied to scenarios such as automotive windshields, augmented reality guidance, and smart building windows. Background Technology

[0002] Existing transparent display technologies mainly include the following three categories: OLED transparent displays: Based on TFT organic light-emitting materials, they have high brightness and video-grade image quality, but suffer from problems such as high cost, short lifespan, and poor environmental adaptability.

[0003] LED dot matrix transparent screen: Transparency is achieved through a dot array of LEDs, but this has a significant impact on transparency and is not suitable for full-view applications.

[0004] Projection-type HUD: It uses reflective projection + optical film, which has the problems of system complexity and poor visibility in sunlight.

[0005] In recent years, electrodeless light-emitting materials (such as ZnS:Cu, ZnS:Mn, etc.) have attracted attention due to their stability, large-area fabrication capabilities, and ability to emit light under high-voltage AC electric fields. However, their lack of pixelation and active control capabilities limits their application in information displays. Summary of the Invention

[0006] To address the challenges of balancing transparency, structural complexity, weather resistance, and controllability in existing technologies, this invention provides a transparent display device that is simple in structure, optically transparent, regionally controllable, and capable of large-area fabrication.

[0007] The technical solution of the present invention is as follows: The device includes: Lower glass substrate; Metal trace layers form lateral signal channels; The TFT active matrix layer can control the generation of an electric field in a specific area; Electron-free luminescent phosphor layer, which emits light in response to a local alternating electric field; A transparent conductive layer of silver nanowires serves as the upper electrode; A glass substrate is used to provide encapsulation protection; A sealed frame layer prevents external air or moisture from entering.

[0008] Its characteristics are as follows: A TFT driving structure is used to selectively drive the phosphor to emit light; The conductive layer of silver nanowires achieves a balance between high light transmittance and electrical conductivity; This structure has the ability to actively drive transparent displays, making it suitable for applications such as vehicles and buildings where both visibility and information display are important. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention, showing the following from bottom to top: Lower glass substrate Metal trace signal layer TFT control layer Electron-luminescent phosphorus layer transparent conductive layer of silver nanowires upper glass substrate Sealing border layer (Illustrated documents are attached separately) Implementation

[0010] The silver nanowires have a diameter of 20-100 nm, a sheet resistance of <30 ohms per square area after coating (unit: Ω / □), and a light transmittance of >90%. The electrodeless light-emitting layer is prepared by spin coating of ZnS:Cu green phosphor with a transparent binder, with a thickness of about 20~40μm. The TFT layer is an IGZO type thin film transistor array with a size of 128×64 and a driving voltage of 80~150V AC; The encapsulation uses UV-cured adhesive to seal along the edges, and the interlayer thickness is controlled within 0.5mm.

[0011] Deposit and pattern metal traces on the lower glass; Deposit the TFT array and complete the electrode lead-out; Spin-coating of an electrodeless luminescent phosphor mixture and low-temperature curing; A transparent conductive layer of silver nanowires was deposited on another piece of glass; A sandwich structure is formed by lamination and UV curing encapsulation; Complete the port connection and docking with the driver circuit.

[0012] The light transmittance was measured to be 81% (including packaging); The response time of regional luminescence is <200ms; Viewing angle > 140°; It has good resistance to ultraviolet light and temperature and humidity.

Claims

1. A transparent display device, characterized in that, The components, arranged sequentially from top to bottom, are: an upper glass substrate, a first transparent conductive layer, an electrodeless light-emitting phosphor layer, a TFT driving control layer, and a lower glass substrate, wherein: The first transparent conductive layer is made of silver nanowire material and is used to provide the upper electrode; The electrodeless luminescent phosphorus layer is an inorganic electroluminescent material layer that can emit light under the action of a high-frequency electric field; The TFT driving control layer includes multiple independent thin-film transistor structures for achieving pixel-level regional control of electric field loading; The upper and lower glass substrates are encapsulated by a sealing frame layer to form a sandwich structure, thereby achieving airtight protection.

2. The transparent display device according to claim 1, characterized in that, The sheet resistance of the transparent conductive layer of the silver nanowire is 5~50 (unit: Ω / □), and the light transmittance is greater than 90%.

3. The transparent display device according to claim 1, characterized in that, The electrodeless luminescent phosphorus layer is made of multicolor phosphorus powder with ZnS as the main component and different activators doped, and multicolor display areas are formed by partitioning through shielding / patterning technology.

4. The transparent display device according to claim 1, characterized in that, The TFT control layer is a transparent thin-film transistor array based on IGZO (indium gallium zinc oxide) or zinc oxide materials.

5. The transparent display device according to claim 1, characterized in that, A dielectric buffer layer is provided between the first transparent conductive layer and the TFT control layer for electric field homogenization and structural stability enhancement.

6. The transparent display device according to claim 1, characterized in that, The sealing frame layer is made of UV-cured epoxy resin and has the functions of airtight packaging and moisture protection.

7. The transparent display device according to claim 1, characterized in that, The device is externally equipped with an image pre-distortion processing module and a field-of-view dynamic redirection module to compensate for windshield curvature and viewing angle deviation in real time.

8. The transparent display device according to claim 1, characterized in that, The TFT control layer is connected to the image control unit through a driver chip array to realize regional grayscale adjustment and dynamic image playback functions.

9. The transparent display device according to any one of claims 1 to 8, characterized in that, This device is used in vehicle windshields to enable a transparent head-up display of traffic information, navigation instructions, and augmented reality content.

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