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Rear-projection display screen with nanometer coatings

A nano-coating and display technology, applied in the field of materials, can solve the problems of unsatisfactory screen performance indicators, not nano-level, etc., and achieve the effect of improving viewing effect, low cost, and improved resolution

Inactive Publication Date: 2009-02-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen from the above related patent documents that although there are examples of nanomaterials being applied to transmissive display screens, they are mainly used in integral cast rear projection display screens (CN 1327171A, CN1392163A, CN 1677230, US 7,046,439), However, the particle size of materials used in coating-type transmissive display screens (US 6,369,944, US 6,869,195) is often not at the nanometer level, and the screen performance indicators are not satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take La with a particle size of 150nm 2 o 3 Powder. 175ml nitro varnish+175ml thinner+10wt% La 2 o 3 Nano-powder + 0.3wt% dispersant + 0.2wt% high-pigment carbon black graying agent is sanded to obtain a mixed turbid liquid, and the paint is sprayed on a roughened PMMA transparent substrate to obtain a functional nano-coated rear projection display. The optical characteristics of the display are that the brightness coefficient β is 6, the viewing angle 2α is 40°, and the effective viewing angle 2α 1 is 120°, and the resolution is 120 line pairs / mm.

Embodiment 2

[0042] Take CeO with a particle size of 80nm 2 Powder. 200ml polyvinyl butyral based paint + 150ml alcohol + 8wt% CeO 2 Nano-powder + 0.3wt% dispersant + 0.1wt% high-pigment carbon black graying agent is sanded until uniform, and sprayed on the roughened PC transparent substrate to obtain a functional nano-coating rear projection display screen. The optical characteristics of the display are that the brightness coefficient β is 1.8, the viewing angle 2α is 40°, and the effective viewing angle 2α 1 is 36°, and the resolution is 110 line pairs / mm.

Embodiment 3

[0044] Take TiO with a particle size of 200nm 2 Powder. 175ml acrylic paint+175ml thinner+5wt%TiO 2 Nano powder + 0.2wt% dispersant + 0.15wt% automobile black paint graying agent is sanded evenly, and sprayed on the PC transparent substrate pre-grinded with diamond abrasive paste to obtain a functional nano-coated rear projection display screen. The optical characteristics of the display are that the brightness coefficient β is 4, the viewing angle 2α is 50°, and the effective viewing angle 2α 1 is 90°, and the resolution is 120 line pairs / mm.

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Abstract

The invention relates to a functional nano-coated high-definition rear-projection display screen and belongs to the material technical field. The display screen comprises a transparent substrate and a functional nano-coating. The substrate is made of transparent materials such as polymethyl methacrylate (PMMA) or polycarbonate (PC). The functional nano-coating contains nano-sized light-scattering fillers such as earth oxides, oxides or sulfides. The refractive index of the filler is in the range from 1.5 to 3.0. The particle size of the filler is in the range from 80 nm to 300 nm. The coating also contains nitrocellulose lacquer, acrylic acid or polyvinyl butyral film-forming agent, thinner or alcohol diluent, high color black liming agent and dispersing agent. The novel nano-coated high-definition rear-projection display screen has the advantages of adjustable high brightness within a large range, large view angle and ultra-high resolution. The functional nano-coating is not limited by the structure and size of the screen and particularly applicable to large-size screens, special-shaped screens and spliced screens.

Description

technical field [0001] The invention relates to a functional nano-coated rear-projection display screen with high brightness, high viewing angle, ultra-high definition and simple preparation process, which belongs to the field of material technology. Background technique [0002] With the development of material technology and optoelectronic technology, image display and its display terminal have become an important means of modern information dissemination and communication. Display screens can be divided into front projection screens and rear projection screens according to their usage characteristics. The rear projection screen is also called a transmission screen. The observer and the projection device are on both sides of the screen. The function of the screen is to clearly display the projected image and project it in the same direction. Rear-projection screens can display images depending on the light transmission, absorption, and scattering capabilities of the scree...

Claims

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Application Information

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IPC IPC(8): G03B21/56C09D101/18C09D133/02C09D129/14C09D7/12
Inventor 王琳马斌钟家湘王书俊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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