Method for manufacturing high-resolution nano coatings rear-projection display screen

A nano-coating and display technology, applied in coatings, optics, instruments, etc., can solve the problem that the particle size is not nano-scale, the specific value of resolution is not given, and there are few preparation methods for coating rear-projection display screens Seen in reports and other issues, to achieve the effect of simple preparation process, low cost, and high degree of automation control

Inactive Publication Date: 2008-01-30
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] As can be seen from the above relevant patent documents, although there are examples of nanomaterials being applied to transmissive display screens, they are all aimed at integral casting (CN 1641478A, CN 1327171A, CN1392163A, CN 1677230, US 7,046,439); The particle size used in transmissive display screens (US 6,369,944, US 6,869,195) is not nanoscale, and the specific value of its resolution is not given
And the preparation technology method of relevant coating rear projection display screen is also seldom seen in the report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Co-precipitation method was used to prepare La with an average particle size of about 150nm 2 o 3 Nanoparticles.

[0035] On the PMMA transparent substrate, the surface of the substrate is pretreated by sandblasting to form a uniform roughening layer. 175ml nitro varnish+175ml thinner+10wt% La 2 o 3 + 0.3wt% dispersant + 0.2wt% high-pigment carbon black graying agent for sanding for one hour to obtain a uniformly mixed turbid liquid, and pour the turbid liquid into the spray gun. Spray at a speed of 5m / s, and the turbid liquid must be fully atomized. When spraying, the spray gun is sprayed line by line along the screen, and each line overlaps with the previous line by 1 / 4 of the spray spot until the entire screen is sprayed to form a layer of coating. After each line of spraying, let it stand for a few minutes until the thinner volatilizes and the film-forming agent solidifies, then proceed to the next line of spraying. When spraying the second layer, change the o...

Embodiment 2

[0037] Co-precipitation method was used to prepare Y with a particle size of about 120nm 2 o 3 Nanoparticles.

[0038] Repeat the steps in Example 1. But with Y 2 o 3 Powder to replace La 2 o 3 . 200ml polyvinyl butyral based paint + 150ml alcohol + 8wt% Y 2 o 3 + 0.3wt% dispersant + 0.1wt% high-pigment carbon black graying agent for sanding to obtain a uniform turbid liquid. Spray at a speed of 5m / s and repeat 4 layers of spraying. Test the optical characteristics of the display screen, and get a brightness factor of 6, a viewing angle of 2α of 25°, and an effective viewing angle of 2α 1 is 60°, and the resolution is 120 line pairs / mm.

Embodiment 3

[0040] Preparation of TiO with a particle size of about 200nm by co-precipitation 2 Nanoparticles.

[0041] Repeat the steps in Example 1. However, on the PC transparent substrate, the surface of the substrate is pre-grinded with diamond abrasive paste. 175ml acrylic paint+175ml thinner+5wt%TiO 2 powder + 0.2wt% dispersant + 0.15wt% high-pigment carbon black graying agent for sanding for half an hour to obtain a uniform turbid liquid. Spray at a speed of 10m / s and repeat 5 layers of spraying. Test the optical characteristics of the display screen, get a brightness factor of 4, a viewing angle of 2α of 50°, and an effective viewing angle of 2α 1 is 90°, and the resolution is 120 line pairs / mm.

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Abstract

The invention relates to a preparative method of supper clear nanometer coating rear projection viewing screen, which belongs to optoelectronics display technology field. Rear projection viewing screen includes a transparent base and a nanometer coater with light scattering bulking agent in. Certain rare earth oxide, oxide, Barium salt with certain refractive index and light scattering bulking agent nanometer power with average diameter ranging from few tens to three hundred nanometers are chosen. The nanometer power and dispering agent are added in proportion to film-forming agent, attenuant and hyperchromic agent after dispersed mixed to uniform. The mixture is sanded to uniform. The transparent base is grided or sanded in advance, then the feculent liquid is infused into atomizing nozzles of air brush at the speed of 5-10m / s row by row and layer by layer to lead the base to be sprayed by 3-5 layers. Total thickness of coating is less than 10Mum. The base is made up of transparent material such as polymethylmethacrylate, polycarbonate, glass, etc. Zapon, acrylic acid or polyvinylbutyral, liquefier and alcohol are used as attenuant in making filming agent. Fluosol see perfluorocarbon is used as dispering agent while high pigment carbon black, automobile black paint or black lead used in the manufacture of hyperchromic agent.

Description

technical field [0001] The invention relates to a preparation method of a nano-coated optical rear-projection display screen with ultra-high definition, high brightness, high viewing angle, simple preparation process and strong process stability, belonging to the technical field of photoelectric display. Background technique [0002] With the development of optoelectronic technology, image display and its display terminals 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 scat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/56C08J7/04
Inventor 王琳马斌钟家湘王书俊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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