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Lens sheet and transmission screen with lens sheet

A lens sheet and lens part technology, applied in optics, instruments, projection devices, etc., can solve the problem of damage to plastic panels, achieve high contrast, and avoid damage to image quality

Inactive Publication Date: 2004-05-12
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, like the above-mentioned existing lenticular lens sheet, light-diffusing particles are contained in the external light-absorbing portion, and when combined into a projection TV or the like, the light-diffusing particles contained in the external light-absorbing portion will be damaged due to increased vibration during transmission. (The part that protrudes from the surface of the external light absorbing part) touches the plastic panel, and there is a problem of damaging the plastic panel

Method used

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  • Lens sheet and transmission screen with lens sheet
  • Lens sheet and transmission screen with lens sheet
  • Lens sheet and transmission screen with lens sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] The lenticular lens sheet according to Example 1 corresponds to the lenticular lens sheet according to the first embodiment of the present invention, and has an external light absorbing portion formed of black ink containing colored light-diffusing particles in a binder resin. .

[0073] As the binder resin forming the external light absorbing portion, an acrylic resin obtained by dispersing fragmented carbon black to 24% by weight was used. Furthermore, as light-diffusing particles contained in the binder resin, crosslinked acrylic pellets containing 8% by weight of carbon black and having a particle diameter of 13 μm were used. The content of the light-diffusing particles contained in the binder resin was 2%.

[0074] Then, in the region where the external light absorbing portion should be formed in the light-exit side surface of the lenticular lens sheet of the double-sided lens sheet, a binder resin containing such light-diffusing particles was printed using the gr...

Embodiment 2

[0077] The lenticular lens sheet related to Example 2 corresponds to the lenticular lens sheet related to the first embodiment of the present invention, and is the same as in Example 1, and has a black ink made of a binder resin containing light-diffusing particles to which coloring has been applied. The external light absorbing part is formed.

[0078] As the binder resin forming the external light absorbing portion, a urethane acrylic resin obtained by dispersing fragmented carbon black at 30% by weight was used. In addition, as light-diffusing particles contained in the binder resin, crosslinked urethane beads containing 20% ​​by weight of carbon black and having a particle diameter of 45 μm were used. The content of light-diffusing particles contained in the binder resin was 10%.

[0079] Then, in the region where the external light absorbing portion should be formed in the light-exit side surface of the lenticular lens sheet of the double-sided lens sheet, a binder resin...

Embodiment 3

[0082] The lenticular lens sheet according to Example 3 corresponds to the lenticular lens sheet according to the second embodiment of the present invention, except that the external light absorbing portion is formed of black ink containing colored light-diffusing particles in the binder resin. , also with a conductive layer with additional conductivity in the external light absorbing part.

[0083] As the binder resin forming the external light absorbing portion, an acrylic resin in which 25% by weight of fragmented carbon black was dispersed was used. Furthermore, as light-diffusing particles contained in the binder resin, crosslinked acrylic pellets containing 15% by weight of carbon black and having a particle diameter of 20 μm were used. The content of light-diffusing particles contained in the binder resin was 15%.

[0084] On the other hand, as a material for forming the conductive layer, an acrylic resin in which carbon black was dispersed at 33% by weight was used. ...

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Abstract

The present invention provides a lens sheet capable of preventing reflection of extraneous light without decreasing extraneous light absorption, having extraneous light absorbers that can be readily formed by printing and are scarcely stained. The present invention also provides a rear projection screen including such a lens sheet. A rear projection screen 10 is composed of a Fresnel lens sheet 11 and a lenticular lens sheet 12 placed on the viewing side of the Fresnel lens sheet 11. The lenticular lens sheet 12 has lenses 121 formed on those portions of the light-emergent-side surface of the sheet-shaped substrate part 12a through which light converged by lenses 125 pass, and extraneous light absorbers 122 formed on those portions of the light-emergent-side surface of the sheet-shaped substrate part 12a through which light converged by lenses 125 does not pass. Each extraneous light absorber 122 includes a black-colored binder resin 124 and a number of light-diffusing particles 123 subjected to coloring treatment, incorporated in the binder resin 124.

Description

technical field [0001] The present invention relates to a transmissive screen used in projection televisions, and more particularly to a lens sheet such as a lenticular lens sheet that diffuses light incident from the back and emits it in the viewing direction, and a transmissive screen with such a lens sheet . Background technique [0002] Recently, as a transmissive screen used for projection television, etc., it is known that a lenticular lens sheet using a synthetic resin material such as PMMA (polymethyl methacrylate) as a base material is used alone or in combination with other lenses (for example, Fresnel). Ear lens) combined use of the case. [0003] In the lenticular lens sheet of such a transmissive screen, generally, while a lens portion is formed on the surface where light enters (on the back side), the light (image light) condensed by the lens portion on the surface where light exits (observation side) The band-shaped external light absorbing portion is formed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/60
CPCG03B21/60G03B21/602
Inventor 本田诚高桥克则宫田英树新谷克德森优子千千和寿江
Owner DAI NIPPON PRINTING CO LTD
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