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A technology for projection devices and images, applied in projection devices, optics, instruments, etc., can solve the problems of large color difference, low color uniformity, and uneven color of images.

Inactive Publication Date: 2007-10-10
CORETRONIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The irregular shape at the notch 131 will cause a light splitting effect like a prism, that is, the light beam incident on the relay lens 13 adjacent to the notch 131 will be split, as shown in FIG. 2 , the image projected on the screen 16 the color will be uneven
That is to say, when the images on the screen 16 should all be white, the images at the corners of the screen 16 are obviously seen in colors such as red and blue due to the light beam being split due to the notch 131, resulting in the blurring of the images projected on the corners. Large color deviation (difference in color coordinates at different positions on the screen) and low color uniformity

Method used

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Embodiment Construction

[0056] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of three preferred embodiments with reference to the drawings.

[0057] Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

[0058] Referring to Fig. 3, the first preferred embodiment of the projection device of the present invention is suitable for projecting an image light beam on a screen 2, and includes a light emitting unit 3, a condenser lens 41, a relay lens 42, a plurality of photomasks Die 43, a reflective light valve 5, and a projection lens 6.

[0059] The light emitting unit 3 includes a light source 31 that emits a light beam, and an integrating column 32 that is spaced apart from the light source 31 and is arranged on the transmission path of the light beam to make the light intensity ...

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Abstract

A projection device consists of luminous unit for emitting out a light beam, relay lens set with notch at edge and used for receiving light beam emitted from luminous unit, multiple light mask fixed in relay lens near to said notch, reflection light valve set on transmission path of said light beam and used for receiving light beam emitted from relay lens as well as used for modulating light beam to be image light beam, projection lens set at position of said notch in relay lens and used for receiving image light beam emitted from reflection light valve as well as used for projecting said image light beam onto screen.

Description

technical field [0001] The present invention relates to a display device, in particular to a projection device. Background technique [0002] Referring to Fig. 1, the projection device 1 of its existing non-telecentric optical system (non-telecentric optical system) is suitable for image projection on a screen 16, and comprises a light-emitting unit 11, a condenser mirror (condenser) 12, a middle A relay lens 13 , a reflective light valve 14 for receiving non-parallel incident light, and a projection lens 15 . [0003] The light emitting unit 11 includes a plurality of light emitting diodes (Light Emitting Diode, LED) 111 for emitting light beams and an integrated rod 112 for making the light intensity distribution of the light beams uniform. The condenser lens 12 receives the beam emitted from the integrating rod 112 . [0004] The relay lens 13 includes a recessed corner 131 formed on an edge, and receives the light beam emitted from the integrating rod 112 and passing t...

Claims

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Application Information

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IPC IPC(8): G03B21/00G03B21/14G02B27/18
Inventor 陈秋萍廖建中刘劲谷
Owner CORETRONIC