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Optical pipe and projection equipment with this

A technology for projection equipment and light pipes, applied in the field of light pipes, can solve the problems of not being able to improve the imaging efficiency and the degree of optical separation of the optical system

Inactive Publication Date: 2006-08-09
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The wedge-shaped light guide can improve the imaging efficiency of the illumination light, but it cannot improve the degree of optical separation of the optical system
In contrast, a tapered light pipe improves optical separation, but it does not improve imaging efficiency

Method used

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  • Optical pipe and projection equipment with this
  • Optical pipe and projection equipment with this
  • Optical pipe and projection equipment with this

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Embodiment Construction

[0048] Those matters defined in the specification, such as detailed construction and elements, are provided to assist in a comprehensive understanding of the exemplary embodiments of the present invention. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the exemplary embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0049] Figure 4 is a cross-sectional view of a projection device according to an exemplary embodiment of the present invention; Figure 5 yes Figure 4 An exploded perspective view of the lighting system and projection system.

[0050] refer to Figure 4 , a projection device according to an exemplary embodiment of the present invention includes a main body 400 forming an appearance of the projection device. The screen 410 is fixed on the main body ...

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Abstract

A light tunnel (532) for standardising the intensity distribution of light emitted from a light source (520) comprises four trapezoidal reflective surfaces, an incident plane (532a) and an emitting plane (532b). The size of the emitting plane (532b) is larger than that of the incident plane (532a) and the emitting plane (532b) is inclined at a certain angle (¸) relative to the incident plane (532a). The degree of optical separation and image forming efficiency of an illumination light is improved relative to prior rectangular, wedge and taper type light tunnels. The improved optical separation also results in an improved contrast ratio, while allowing the optical system, and a projection apparatus comprising the optical system, to be compact.

Description

technical field [0001] The invention relates to a light guide and a projection device with the same. More particularly, the present invention relates to a light guide and a projection device that improves the performance of optical separation of illumination light by using a light guide that combines the features of a wedge-shaped light guide and a tapered light guide. degree and imaging efficiency. Background technique [0002] In general, a projection device is a display device that magnifies an optical image formed by an image display device and projects it onto a projection surface such as a screen. That is, the projection device receives signals from various image devices such as television (TV), video recorder (VCR), digital versatile disk (DVD) player, personal computer (PC) or camcorder, etc. and projects an optical image enlarged by a lens to the screen. [0003] Projection devices can be classified into first-generation CRT (Cathode Ray ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/14F21Y101/00
CPCG02B27/0994H04N9/3197G03B21/20G03B21/208G02B27/0927G03B21/10H04N9/315H04N9/3114H04N9/3152Y02E60/10H01M50/60
Inventor 金珍植金省兑卢正镐全基郁
Owner SAMSUNG ELECTRONICS CO LTD