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Rear projection display

A technology of display device and wide-angle lens, which is applied in the direction of instruments, projection devices, optics, etc., and can solve the problems of increasing the cost and complexity of the display device 200

Inactive Publication Date: 2010-09-29
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Angle compensation provides a square image but further increases the cost and complexity of the display device 200

Method used

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Embodiment Construction

[0023] An ultra-thin rear projection display system will be described. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent to one of ordinary skill in the art that the present invention can be practiced without these specific details. In other instances, structures and devices are shown in block diagram form in order to avoid obscuring the invention.

[0024] The ultra-thin rear projection display device described herein includes a wide-angle lens system and one or more flat mirrors parallel to a screen on which images are displayed. In one embodiment, the screen has multiple groove corners to provide better illumination than a screen with a single groove corner.

[0025] As described in more detail below, the screen may be a Fresnel lens with one or more grooved corners. Many other objects can also serve as screens as long as they are ca...

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Abstract

The ultra-thin rear project display device described herein includes a wide angle lens system and one or more planar mirrors that are parallel to a screen on which an image is to be displayed. In one embodiment, the screen that has multiple groove angles to provide better illumination than screens with a single groove angle.

Description

technical field [0001] The present invention relates to display devices. More particularly, the present invention relates to thin rear projection display devices. Background technique [0002] To provide televisions with screen sizes greater than about 40 inches, display devices other than direct view cathode ray tubes (CRTs) are typically used. As the screen size of a CRT increased, so did its depth. It is generally believed that an intuitive CRT with a screen size larger than 40 inches is no longer feasible. There are two alternatives for large screen (>40 inch screen size) displays: projection displays and plasma displays. [0003] Existing plasma displays are much more expensive than projection displays. Plasma displays are generally thin enough to be mounted on a wall, but heavy, making installation difficult. For example, today's 42-inch plasma displays weigh 80 pounds or more, while 60-inch plasma displays can weigh 150 pounds or more. One advantage of plasma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/00G03B21/06
CPCG03B21/06G03B21/28G03B21/10G03B21/62
Inventor 马克·大卫·彼得森杰弗里·艾伦·高曼
Owner SEIKO EPSON CORP
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