Rear projection screens and methods of making the same

A back surface and filter technology, applied in the field of rear projection screens and filters, can solve problems such as reduction, and achieve the effect of improving light throughput and improving angularity

Active Publication Date: 2006-04-12
AVERY DENNISON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This reduces the likelihood that information on the screen will be seen by people who are far from the axis of the screen and perhaps those who do not have the right to view the content on the screen

Method used

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  • Rear projection screens and methods of making the same
  • Rear projection screens and methods of making the same
  • Rear projection screens and methods of making the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The front of the clear layer of impact-modified acrylic, such as CP-927 from Ineos Acrylic, was microsculpted under heat and pressure into hemispheres approximately 75 microns in diameter. The back of the transparent layer is micro-sculpted into opposite hemispheres of the same diameter at the same time, the difference is that the hemispheres are elongated. The surface comprising the elongated hemispheres was laminated under heat and pressure to a protective substrate consisting of a layer of low density polyethylene coated on ethylene terephthalate. The front surface is laminated to an opaque layer of thermoplastic urethane S-9815-03, commercially available from Morton International GmbH, which contains 10% finely dispersed carbon black so that the apex of each hemisphere Protrudes just beyond the layer, creating a tunnel of light through the opaque layer. The protective layer was removed and the construct was laminated to a glass plate with optical adhesive, exposing...

Embodiment 2

[0071] The front face of the polycarbonate clear layer was micro-sculpted under heat and pressure into hemispheres approximately 75 microns in diameter. The front surface was laminated to an opaque layer of thermoplastic urethane S-9815-03, commercially available from Morton International GmbH, which contained 10% finely dispersed carbon black so that each hemisphere The vertices just protrude past the layer, forming a tunnel of light through the opaque layer. The construction was laminated to the glass plate with optical adhesive. Using an optical adhesive, another transparent layer of polymethylmethacrylate forming a hemispherical micro-engraved surface is laminated to the back of the polycarbonate layer so that the hemisphere of the polymethylmethacrylate layer exposed.

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Abstract

A light transmitting filter including a light absorbing layer (13) and a transparent layer (11) having a microstructured front surface (22) and a microstructured back surface (25), wherein the front surface is embedded in the light absorbing layer (13).

Description

[0001] This application has the benefit of Provisional Patent Application No. 60 / 454,197, filed March 12,2003. field of invention [0002] This invention relates to rear projection screens and filters, and more particularly, to rear projection screens and filters fabricated with microstructures. Background of the invention [0003] Rear projection screens project images from behind the screen to the audience on the opposite side of the screen. The image is affected by the amount of light or throughput transmitted by the screen or filter. In general, the amount of light that screens and filters transmit is affected by their construction. It is desirable to have a configuration that increases light throughput as well as improves contrast. [0004] With the improvement of the definition of the projected image, the number of pixels has increased from the traditional tens of thousands of pixels to more than one million pixels. Therefore, projection screens are also required to...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G02B27/00G02B3/00G03BG03B21/60G03B21/62
CPCG03B21/625G03B21/62G02B3/00G03B21/60
InventorM·E·海宁顿
OwnerAVERY DENNISON CORP