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A lighting system, projector and rear projection system

A lighting system and attenuation film technology, which is applied in the field of projectors, rear projection systems, and lighting systems, can solve the problems of dark corners and dark corners of unit display, dark corners of unit dark edges, etc., and achieve the solution of dark corners and brightness uniformity The effect of improving and making up for the difference in light energy loss

Inactive Publication Date: 2016-06-29
GUANGDONG VTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome at least one defect (deficiency) of the above-mentioned prior art, the present invention provides a lighting system, which can solve the problem of dark edges and dark corners in the unit display in the existing projection splicing display when it is applied in the field of projection display
[0005] The present invention also provides a projector, which is applied in the field of projection display and can solve the problem of dark edges and dark corners in the unit display in the existing projection splicing display
[0006] The present invention also provides a rear projection system to solve the problem of dark edges and dark corners in the unit display in the existing projection mosaic display

Method used

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  • A lighting system, projector and rear projection system
  • A lighting system, projector and rear projection system
  • A lighting system, projector and rear projection system

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1 Shown is a schematic structural view of a specific embodiment of the lighting system of the present invention. see figure 1 , a specific embodiment of the present invention a lighting system specifically includes at least R, G, B three-color LED light source, in figure 1 The structure shown includes one red LED light source 1, one green LED light source 3 and one blue LED light source 4; it also includes at least three sets of first collimating lens groups 2, dichroic mirrors 5 and converging lens groups 6 placed in sequence , diaphragm 7, optical integrating rod 8 and attenuation device 16, red LED light source 1, green LED light source 3 and blue LED light source 4 respectively correspond to a group of first collimating lens group 2, and the light emitted by each light source passes through the respective first After a collimating lens group 2 passes through a dichroic mirror 5 to mix light; the mixed light passes through a converging lens group 6, ...

Embodiment 2

[0037] On the basis of Embodiment 1, this embodiment adopts an attenuation sheet to realize the attenuation device 16 of Embodiment 1, specifically as image 3 shown.

[0038] Such as image 3 As shown, a lighting system in this specific embodiment includes at least three-color LED light sources of R, G, and B. image 3 The structure shown includes one red LED light source 1, one green LED light source 3 and one blue LED light source 4; it also includes at least three sets of first collimating lens groups 2, dichroic mirrors 5 and converging lens groups 6 placed in sequence , diaphragm 7, optical integrating rod 8 and attenuation sheet 9 as attenuation device, red LED light source 1, green LED light source 3 and blue LED light source 4 respectively correspond to a group of first collimating lens group 2, the light that each light source sends After passing through the respective first collimating lens groups 2, the light is mixed through the dichroic mirror 5; the mixed ligh...

Embodiment 3

[0048] On the basis of Embodiment 1, this embodiment implements the attenuation device 15 of Embodiment 1 by means of a polarization conversion system and a polarizer, specifically as Figure 5 shown.

[0049] Such as image 3 As shown, a lighting system in this specific embodiment includes at least three-color LED light sources of R, G, and B. image 3 The structure shown includes one red LED light source 1, one green LED light source 3 and one blue LED light source 4; it also includes at least three sets of first collimating lens groups 2, dichroic mirrors 5 and converging lens groups 6 placed in sequence , diaphragm 7, optical integrator rod 8 and the second collimating lens group 13, polarization conversion system 14 and polarizer 15 that constitute the attenuation device, polarizer 15 has several kinds of gradient polarization directions from inside to outside, the outermost The polarization direction is the same as the light vector vibration direction entering the pola...

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Abstract

The present invention relates to the field of projection, and more specifically, to an illumination system, a projector and a rear projection system. The lighting system includes at least three colors of R, G, and B LED light sources, and also includes at least three sets of first collimating lens groups, dichroic mirrors, converging lens groups, diaphragms, optical integrating rods, and attenuation devices placed in sequence, R, G , B LED light sources each correspond to a group of first collimating lens groups, and the light emitted by each light source is mixed through the dichroic mirror after the respective first collimating lens groups; the mixed light passes through the converging lens group, diaphragm, optical The integrating rod enters the attenuation device, and the attenuation device attenuates the light gradually from the periphery to the center to obtain a light beam that gradually dims from the periphery to the center. On the premise of ensuring the relative uniformity of the illumination spot, the present invention can make up for the loss of light energy in different ranges of incident angles, so that the brightness uniformity of the outgoing screen is improved, and the problem of dark edges and dark corners in the unit display in the existing projection splicing display can be solved. question.

Description

technical field [0001] The present invention relates to the field of projection, and more specifically, to an illumination system, a projector and a rear projection system. Background technique [0002] In recent years, the DLP (Digital Light Processing) projection display market has developed rapidly, playing an important role in many industries and places such as the power industry, coal industry, transportation department, public security department, conference center, and exhibition center. [0003] Products need to be continuously improved and optimized. As a relatively mature product, DLP video walls also have areas for improvement. In the actual application of DLP video walls, there is a common problem of dark edges and dark corners in the unit display, and this phenomenon is more obvious when the unit screen size is larger and the screen gain is higher, which directly affects the consistency and quality of the mosaic display. integrity. The main reason for the prob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20
CPCG02B27/0927G02B27/0938G03B21/2013G03B21/2033G03B21/208
Inventor 王新星
Owner GUANGDONG VTRON TECH CO LTD