Rear-projection screen, optical element and manufacturing method thereof

Abstract

A rear projection screen comprises the first optical element and the second optical element. The two are adjacent-set as the second optical element has the first surface and the second surface opposite to the first. Both surfaces have multiple columnar snug separately, a dent is formed at interval place of each column snug on the second surface, each dent is opposite to the columnar snug of the first surface and is formed at opposite position between the columnar snugs. Each dent is filled with a light absorption material. An optical element and its manufacturing method are also provided by the present invention.

Description

technical field [0001] The invention relates to a screen, an optical element of the screen and a manufacturing method thereof, in particular to a rear projection screen, an optical element of the rear projection screen and a manufacturing method thereof. Background technique [0002] With the popularization of HDTV and DVD Player, the image quality of large-size displays has been paid more and more attention by the market. Among large-size displays, projection display devices have always received great attention because of their application occasions and price considerations, especially rear projection TVs. In the rear projection TV, the main function of the rear projection screen is to project the image in the projector. It is characterized by large size, high image quality and thinness in the market. Therefore, the key points to be considered in the design of the rear projection screen include: Observing the brightness of the angle, increasing the image contrast and resol...

AI Technical Summary

Problems solved by technology

However, when the incident light 1000 passes through the first surface 110 and is scattered on the second surface 111 after being focused (focus point P), the outgoing light 1001 will be blocked by the light absorbing layer 120, resulting in a decrease in brightness. 120 has certain width and height restrictions

It is worth mentioning that the above-mentioned phenomenon will be more serious due to the thickness tolerance in the production of the lenticular lens (that is, the focal point P moves forward or backward due to the thickness tolerance in the production), which will lead to light absorption The width of the layer is further reduced

[0004] In addition, as shown in FIG. 1C, due to the limitation of the width of the light absorbing layer 120, the ambient interference light 1002 may penetrate the area where the light absorbing layer 120 is not formed, and further, there will be multiple reflected light 1003 from the The area where the light absorbing layer 120 is formed penetrates out, this phenomenon will limit the improvement of contrast and resolution

[0005] In addition, in the manufacturing method of the rear projection screen 1 in the prior art, since the light absorbing layer 120 is formed on each strip-shaped convex portion 111b of the lenticular lens 11, the surface flatness of each strip-shaped convex portion 111b and the printing time The pressure control is an important parameter of the manufacturing process, so it also leads to another bottleneck in the process yield improvement of the light absorbing layer 120 during printing.

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