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Light uniformization element

A technology of light uniformity and light guide components, applied in optical components, optics, instruments, etc., can solve problems such as reducing image quality, achieve the effect of improving image quality and improving light output efficiency

Inactive Publication Date: 2010-02-10
CORETRONIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the light output end 202 of the solid cylinder 200' will be directly imaged on the light valve 140, if the light output end 202 has defects such as dust, holes (dig), scratches, particles, etc., it will are enlarged and projected onto the screen, severely degrading the image quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0059] refer to image 3 , the double-lamp lighting system 500 is suitable for a projection device. In this embodiment, the dual lamp lighting system 500 includes two lamp sources 40 a, 40 b and a light homogenizing element 300 . The light homogenizing element 300 includes a hollow cylinder 310 and two solid cylinders 320 . The hollow cylinder 310 has a first light incident end 312 and a first light exit end 314 opposite to each other. Each solid cylinder 320 has a second light incident end 322 and a second light exit end 324 opposite to each other, and the second light exit end 324 is located in the first light incident end 312 of the hollow cylinder 310 .

[0060] Each solid cylinder 320 can be a cylinder or a polygonal cylinder, and the polygonal cylinder can be a rectangular cylinder or a triangular cylinder. In addition, the length of the hollow cylinder 310 is, for example, smaller than the length of each solid cylinder 320 . In addition, the double-lamp lighting syste...

no. 2 example

[0069] refer to Figure 7 The difference between the light homogenizing element 300a and the light homogenizing element 300 is that the lengths of the solid cylinders 320 of the light homogenizing element 300a are different. The second light emitting ends 324 of the solid cylinders 320 of the light homogenizing element 300 a are located on the same plane, while the second light incident ends 322 of the solid cylinders 320 are located on different planes. In addition, the light guide element 60a of the dual lamp lighting system 500a is a reflective element. Among the plurality of solid cylinders 320 , the shorter solid cylinder 320 is disposed between the light guide element 60 a and the hollow cylinder 310 to reflect the light beam 50 b to the shorter solid cylinder 320 . The light beam 50a is directly incident on the longer solid cylinder 320 .

no. 3 example

[0071] refer to Figure 8 The difference between the light homogenizing element 300b and the light homogenizing element 300 is that each solid cylinder 320b of the light homogenizing element 300b is a triangular cylinder, and two solid cylinders 320b form a rectangular cylinder.

[0072] Although the number of solid cylinders of the light homogenizing element in the first embodiment to the third embodiment is two, the present invention does not limit the number of solid cylinders. The solid cylinder of the light homogenizing element of the present invention can be adjusted according to the number of light sources of the lighting system. Hereinafter, an embodiment will be used to illustrate the light homogenizing element having more than two solid columns.

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Abstract

A light homogenization element is suitable for a multiple-light lighting system. The light homogenization element comprises a hollow column and a plurality of solid pillars. The hollow column is provided with a first light inlet end and a first light outlet end. The first light inlet end is opposite to the first light outlet end. Each solid pillar is provided with a second light inlet end and a second light outlet end. The second light inlet end is opposite to the second light outlet end. The second light outlet end is arranged in the first light inlet end of the hollow column. The light homogenization element has higher light output efficiency and can improve the imaging quality of a projecting device.

Description

technical field [0001] The invention relates to a projection device, in particular to a light homogenizing element of the projection device. Background technique [0002] refer to figure 1 , the existing projection device 100 includes a light source 110 , a light integration rod 120 , a plurality of lenses 130 , a light valve 140 and a projection lens 150 . The light source 110 is used for providing an illumination beam 112 , the light integrating rod 120 is used for uniformizing the illumination beam 112 , and the lens 130 is used for converging the illumination beam 112 on the light valve 140 . The light valve 140 can convert the illumination beam 112 into an image beam 112', and the projection lens 150 is used to project the image beam 112' onto a screen (not shown) to form an image on the screen. [0003] In general, the light integrating column 120 can be Figure 2A The hollow cylinder 200 shown or Figure 2B A solid cylinder 200' is shown. The hollow cylinder 200 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/14G03B21/20G02B27/10
Inventor 王思克
Owner CORETRONIC