Projection system and lens combination

A combination technology of projection system and lens, which is applied in the field of projection system to achieve the effect of effective utilization

Active Publication Date: 2009-10-21
QISDA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the requirement of light weight projection system is becoming more and more important, how to effectively configure the components in the projection system while taking into account the image quality has also become a problem that cannot be ignored

Method used

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  • Projection system and lens combination
  • Projection system and lens combination
  • Projection system and lens combination

Examples

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Embodiment Construction

[0025] A first embodiment according to the present invention is a projection system comprising two sets of lenses. see figure 1 , figure 1 A schematic diagram of the projection system. Such as figure 1 As shown, the projection system 10 includes a light source 11 , a light pipe 12 , a first set of lenses 13 , a second set of lenses 14 , a light valve 15 and a lens 16 .

[0026] The second set of lenses 14 in this embodiment is a refractive lens, and the first set of lenses 13 includes three refractive lenses ( 13A˜13C). In fact, the first group of lenses 13 may also only include two refracting mirrors; the aberration of the first group of lenses 13 can be changed by using different numbers of refracting mirrors.

[0027] In practical applications, the light source 11 may be an ellipsoid lamp including a mercury bulb, a tungsten filament bulb or other similar illuminants to provide original light. The original light will be reflected multiple times in the light pipe 12 , a...

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Abstract

The invention provides a projection system comprising two groups of lenses, wherein the first group of lenses is provided with a first focal length used for forming a first image by focusing incident light rays, and the second group of lenses is provided with a second focal length used for projecting the first image into a second image; a lens vertex distance is spaced between the two groups of lenses and is correlative to a light path between the first group of lenses and the second group of lenses; the second focal length is less than or equal to the lens vertex distance, and the difference of the lens vertex distance and the second focal length is less than or equal to half of the first focal length. The invention also provides a lens combination.

Description

technical field [0001] The present invention relates to projection systems, and more particularly to projection systems comprising multiple sets of lenses. The invention also relates to a lens combination for a projection system. Background technique [0002] In recent years, with the vigorous development of various electronic products, commercial and home multimedia systems are increasingly popular. In most multimedia systems, the most important hardware is the display device used to present images. How to improve the quality and appearance design of display devices is an issue that is highly valued. Take the projection system used in many public places, businesses or home theaters as an example. Users usually require that the projection device should be light in size, not occupy much space, and provide bright and clear images. [0003] Most of the previous technologies related to projection systems aim to optimize various components inside the system (eg, light sources,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09G03B21/00
Inventor 林明坤
Owner QISDA CORP
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