Making process of antireflecting protection component for projecting screen

Abstract

The making process of protective antireflecting constituent includes the step of: cleaning glass; coating titanate solution films onto the two sides of the glass through soaking the glass inside ethyl titanate solution, stoving to eliminate water andethanol of the titanate solution films and form homogeneous titania films; coating silicic acid sol films by soaking the glass with titania films in ethyl silicate solution, stoving to eliminate water and ethanol to form homogeneous silica films.

Description

Technical field [0001] The invention relates to a method for making an anti-reflection protective layer used in projection screens. Background technique [0002] The screens currently used in projection TVs are generally composed of three layers (see Figure 1). The layer facing the projector is the Fresnel lens layer 1', and the middle layer is the inaccessible surface guide layer or scattering layer 2. ', the front surface is an anti-reflection protective layer 3'. Among them, the anti-reflection protective layer is also called the anti-reflection protection component, which mainly overcomes the reflection of ambient light, improves the contrast of the image, and protects the original microstructure of the middle layer from being artificially damaged. [0003] At present, the production methods of anti-reflection protective layer (i.e. anti-reflection protection component) are as follows: [0004] 1: One surface of the optical plexiglass is roughened by sandblasting and o...

AI Technical Summary

Problems solved by technology

[0004] 1: One surface of the optical plexiglass is roughened by sandblasting and other processes, and the directional reflection of ambient light is broken from the surface. The advantage of this method is that the process is simple and easy, but in essence, the reflectivity does not decrease, and it is not The function of anti-reflection and anti-reflection has not been achieved. At the same time, because of the randomness of the matte surface, the total reflection probability of the light emitted by the projector and the environment is increased, so that the reflection of the ambient light is strengthened and the projected light of the projector is weakened, thereby affecting the image quality.

[0005] 2: Add some pigments to the optical plexiglass to absorb ambient light. In essence, this method does not achieve anti-reflection and anti-reflection functions. It only sacrifices brightness to improve contrast, which affects the output brightness of the image and affects image quality.

[0008] 1) The cosine distribution of particle concentration in space makes it very difficult to grasp the uniformity of film thickness in large areas

[0009] 2) The continuity of the coating process is very poor, it is almost difficult to achieve continuous coating, the production efficiency is low, and it is not suitable for mass production

[0010] 3) It is difficult to coat both sides at the same time

[0013] 2) The sputtering efficiency of the medium is low (such as SiO 2 )

[0014] 3) It is difficult to coat both sides at the same time

[0015] 4) The thickness of the film layer is difficult to control

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