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Large-size projection lens and projection system using same

A projection lens and projection system technology, applied in the field of projection technology, can solve the problems of graininess in the picture, expensive micro-projection equipment, and excessive magnification, and achieve the effects of cost control, low cost, and increased magnification

Active Publication Date: 2020-11-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in order to realize the effect of portability, the micro-projection equipment on the market mostly uses micro-OLED or LCOS display screens. With such a display screen, when the magnification factor is too large, the picture will appear grainy.
The price of micro-projection equipment with good imaging effect is extremely expensive, so an economical and practical micro-projection equipment with good imaging effect and large magnification is urgently needed in the market

Method used

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  • Large-size projection lens and projection system using same
  • Large-size projection lens and projection system using same
  • Large-size projection lens and projection system using same

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Embodiment Construction

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0023] figure 1 It is a schematic diagram of a projection lens used for large-scale projection in an embodiment disclosed in the present invention. The projection lens provided by the present invention comprises at least two coaxial lenses, and the focal length f of the projection lens is 130 mm to 150 mm. In order to facilitate processing and re...

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Abstract

The embodiment of the invention provides a projection lens for large-size projection, which comprises at least two coaxial lenses, and the focal length f of the projection lens is 130-150mm. The invention also provides a projection system, and the projection lens and the projection system can achieve the large-size projection display, are lower in cost, and are convenient to carry.

Description

technical field [0001] The invention relates to a projection technology, in particular to a projection lens for large-scale projection and a projection system using the projection lens. Background technique [0002] With the diversified development of display devices, portable and highly mobile miniature projection devices are gradually replacing traditional display devices such as TVs and becoming the first choice of ordinary consumers. However, in order to realize the effect of portability, the micro-projection devices currently on the market mostly use micro-OLED or LCOS display screens. With such a display screen, when the magnification factor is too large, the picture will appear grainy. The micro-projection device with good imaging effect is extremely expensive, so an economical and practical micro-projection device with good imaging effect and large magnification is urgently needed in the market. Contents of the invention [0003] In view of the above problems, emb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/14G02B13/00G03B21/20
CPCG03B21/14G03B21/2033G02B13/0045G03B21/208
Inventor 程德文沈文睿
Owner BEIJING INSTITUTE OF TECHNOLOGYGY