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Optical projection system and method

A technology of optical projection and projection unit, which is applied in the field of optical projection systems, and can solve the problems that it is not easy to achieve equal optical paths and cannot be adjusted arbitrarily.

Inactive Publication Date: 2008-06-04
UNITED MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And because it is a non-telecentric design, the optical path of each color beam is limited by the color beam splitter and cannot be adjusted arbitrarily, so the optical path of each color beam is not easy to achieve the design of equal optical path

Method used

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  • Optical projection system and method
  • Optical projection system and method
  • Optical projection system and method

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Embodiment Construction

[0041] For the above Figure 4 According to the analysis of the present invention, it is found that the traditional design also has many problems. For example, in the case of the wire-grid polarizer 320, it may be bent due to uneven thermal expansion or other reasons, thereby causing non-parallel reflection of the light beams, resulting in severe lateral color or transverse dichromatic aberration.

[0042] For the wire grid polarizing element 320, with the operation of the reflective liquid crystal panel 322 and the light combining prism 162, the traditional basic operation mechanism is as follows Figure 5 Shown. The light passing through the wire grid polarizing element has a polarization state and reaches the reflective liquid crystal panel 322. The reflective liquid crystal panel 322 converts the polarization state into another polarization state according to the needs of each pixel, and then reflects to the wire grid polarization element. Then, due to the characteristics of t...

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Abstract

The disclosed optical projection system comprises: a light source for parallel beam, a first color spectroscope to separate the beam into a first primary color beam and a mixed beam with a second / third primary color beam; a first bilateral telecentric group set after the first spectroscope just at the first light path of the first primary color beam to convert it into a first beam; a second bilateral telecentric group set after the first spectroscope just at the second light path of the mixed beam; a second color spectroscope set at some position to separate the mixed beam into a second and third beam, and a beam-joining projection unit to receive and compose last three beams.

Description

[0001] This application is a divisional application of the Chinese patent application entitled "Optical Projection System and Method" submitted by UMC to the State Intellectual Property Office of China on February 16, 2004. The application number is 200410005040.1. Technical field [0002] The present invention relates to an optical projection system, and particularly relates to a wire grid polarizing element that can combine light in a penetrating manner. Background technique [0003] Optical projection systems are very common in daily life. For example, a tiny image data is projected onto a large screen for users to observe. In particular, when other technologies have developed significantly, such as the development of liquid crystal display technology, with the optical projection system, the effect of displaying images can be achieved. For example, LCD projection TV is a modern technology product. [0004] For the optical projection system, with the use of liquid crystal displa...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/10G02B27/18G02F1/13
Inventor 吕和陈中荣叶世博
Owner UNITED MICROELECTRONICS CORP