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A laser projection display screen containing a light-absorbing layer and its preparation method and application

A technology of laser projection and display screen, applied in optics, instruments, projection devices, etc., can solve the problems of micro-display challenges, high price, high OLED technology threshold and investment quota

Active Publication Date: 2020-06-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technical threshold and investment amount of OLED are very high, the yield rate is very low, especially the service life is short, and the price remains high, which poses even greater challenges to OLED micro-displays

Method used

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  • A laser projection display screen containing a light-absorbing layer and its preparation method and application
  • A laser projection display screen containing a light-absorbing layer and its preparation method and application
  • A laser projection display screen containing a light-absorbing layer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] This embodiment provides a laser projection display screen containing a light absorbing layer and a preparation method thereof.

[0070] A laser projection display with a light-absorbing layer, such as figure 1 As shown, it consists of a substrate (1), an up-conversion luminescent material layer (2), an isolation layer (3), a green fluorescent material layer (4), a light-absorbing isolation layer I (5), a blue fluorescent material layer (6) and a protective Layers (7) are stacked successively.

[0071] The substrate 1 is made of glass.

[0072] The material of the up-conversion luminescent material layer is NaYF doped with ytterbium and erbium 4 ultrafine nanocrystals. Its preparation method is, Y 2 o 3 , Yb 2 o 3 and Er 2 o 3 According to the molar ratio m(Y 3+ ):m(Yb 3+ ):m(Er 3+ )=70:28:2 was dissolved in dilute hydrochloric acid to obtain a rare earth chloride precursor. Add 1 mmol of the above-mentioned rare earth chloride precursor dropwise into a mix...

Embodiment 2

[0094] This embodiment provides a laser projection display screen containing a light absorbing layer and a preparation method thereof.

[0095] The structure and preparation method of the display screen in this embodiment are the same as in Embodiment 1, the difference is that the material of the light-absorbing isolation layer I is polyimide containing light-absorbing groups, which has the following structural units:

[0096]

[0097] This structure can absorb light with a wavelength of less than 450nm, and the polyimide will not dissolve in toluene.

Embodiment 3

[0099] This embodiment provides a laser projection display screen containing a light absorbing layer and a preparation method thereof.

[0100] The structure and preparation method of the display screen in this embodiment are the same as in Embodiment 1, the difference is that the material of the light-absorbing isolation layer I is polyimide containing light-absorbing groups, which has the following structural units:

[0101]

[0102] This structure can absorb light before 450nm, and polyimide will not dissolve in toluene.

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Abstract

The invention belongs to the technical field of preparation of display screens, in particular to a laser projection display screen with a light absorption layer and a preparing method and applicationthereof. The laser projection display screen comprises a protection layer, a blue fluorescent material layer, a green fluorescent material layer, a red fluorescent material layer / an up-conversion luminescent material layer and a substrate, wherein the protection layer, the blue fluorescent material layer, the green fluorescent material layer, the red fluorescent material layer / the upper conversionluminescent material layer and the substrate are stacked in sequence. The fluorescent material layers are separated by light absorption separation layers, so that excitation on the green fluorescentmaterial layer and the red fluorescent material layer by high-energy laser is avoided, and lowering of the colour purity is inhibited. The laser projection display screen is made of an ultra-flat transparent material, and can avoid the diffuse reflection phenomenon. Adopted organic or polymer green and blue fluorescent materials have anisotropy, and can avoid specular reflection. An up-conversionluminescent material can obtain saturated light, and has high luminescent efficiency and good stability. When laser light is used as a light source, the distinguishability of the laser projection display screen can reach up to 10 k. The preparing method of the laser projection display screen is simple, and the laser projection display screen is low in cost, long in service life and light, can be folded and unfolded, is waterproof, does not need to be driven by power, and can be applied to multiple fields.

Description

technical field [0001] The invention belongs to the technical field of display screen preparation, and in particular relates to a laser projection display screen containing a light-absorbing layer and its preparation method and application. Background technique [0002] With the rise of VR technology, ultra-high-resolution head-mounted displays will become one of the mainstream wearable devices in the future. Projection display technology is the first choice for VR display technology due to its relatively mature and reliable products. Projection display is a method or device in which the light source is controlled by planar image information, and the image is enlarged and displayed on the projection screen by using the optical system and projection space. However, the low resolution of current projection display limits its application in high-resolution VR devices. [0003] The reason for the low resolution of the projection display is that the viewing angle of the specular...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/60G03B21/56
CPCG03B21/567G03B21/60
Inventor 莫越奇舒伟
Owner SOUTH CHINA UNIV OF TECH
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