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Lens module, projection device with lens module, and imaging device

A technology of a projection device and a lens module, which is applied to optical elements, optics, instruments, etc., can solve problems such as a decrease in display contrast, and achieve the effects of improving image quality, reducing the number of components, and reducing manufacturing costs.

Active Publication Date: 2015-11-18
YOUNG OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitations of the swing angle of the digital micromirror device and other design parameters, in the transient state or offstate of the digital micromirror device, part of the light will be projected to the screen through the projection lens to form stray light, resulting in display Contrast drop problem

Method used

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  • Lens module, projection device with lens module, and imaging device
  • Lens module, projection device with lens module, and imaging device
  • Lens module, projection device with lens module, and imaging device

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Embodiment Construction

[0048] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only referring to the directions of the drawings. Accordingly, the directional terms are used to illustrate and not to limit the invention.

[0049] figure 1 It is a schematic diagram of a projection device according to an embodiment of the present invention. like figure 1 As shown, the projection device 10 includes an illumination unit 12 , an image generating unit 14 and a lens module 20 . The image generating unit 14 receives the illumination beam I from the illumination unit 12 and modulates the illumination beam I into an image beam IM. The lens module 20 is disposed on the transmission path of the image beam IM to project the image beam...

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Abstract

The invention provides a lens module and a projection module and an imaging module with the same. The lens module is arranged between the object side and the image side for receiving an image beam and comprises a lens group. The image beam comprises a preset shielding part. The lens group comprises a plurality of lenses. At least a shading region is formed at partial surface of at least one of the lenses. The shading region is located on the transmission path of the preset shielding part.

Description

technical field [0001] The invention relates to a lens module, a projection device and an image pickup device with the lens module. Background technique [0002] In a known digital light processing projection device, the light emitted by the LED passes through the light combination module and the illumination lens group and then enters a digital micromirror device. The digital micromirror device uses a plurality of micromirrors to reflect light, and the tilt angle is changed through the swing of the micromirror, so that the light can be reflected to the projection lens and then projected onto the screen. Due to the limitations of the swing angle of the digital micromirror device and other design parameters, in the transient state or offstate of the digital micromirror device, part of the light will be projected to the screen through the projection lens to form stray light, resulting in display Contrast drop problem. [0003] US Patent Publication No. 6637894 discloses a de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00
Inventor 郑泓佑林裕修陈佑柏陈时伟
Owner YOUNG OPTICS