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LED light source illumination system of miniature type LCOS projector

A technology of LED light source and lighting system, which is applied in the direction of using projection device image reproducer, optics, optical components, etc., can solve the problems of complex heat dissipation system, large loss of light energy, complex optical system, etc., and achieve a simple structure of the lighting system, The effect of high light energy utilization rate and compact system structure

Inactive Publication Date: 2009-01-14
SHANGHAI FOREAL OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of this structure is that the light source is UHP, the lifespan is short, the color gamut is narrow, the heat dissipation system is complicated, and the reliability and stability are poor
At the same time, the light emitted by the UHP light source passes through the relay lens group, the polarization splitter prism, and illuminates the LCOS liquid crystal panel. In this lighting system, the light needs to pass through multiple optical devices, and the loss of light energy is large. Contributes to the miniaturization of the projector

Method used

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  • LED light source illumination system of miniature type LCOS projector
  • LED light source illumination system of miniature type LCOS projector
  • LED light source illumination system of miniature type LCOS projector

Examples

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Embodiment 1

[0017] Embodiment 1 This embodiment adopts the same structure as the LED light source lighting system of the small LCOS projector described in the summary of the invention, and will not be repeated here. See figure 2 .

[0018] The working principle of this embodiment:

[0019] The red light emitted by the red light LED 11 is fully reflected and compressed in the red light pyramid 211 and converges on the red light polarizer 212, and the S-polarized light is emitted from the light-emitting surface of the red light polarizer 212, and enters the red light polarization beam splitter prism 31. The red light LCOS display chip 41 is illuminated after being reflected on the beam splitting surface of the red polarizing beam splitting prism 31. Since the light emitting surface of the red polarizing light generator 21 has the same shape and size as the light incident surface of the red polarizing beam splitting prism 31, the red light The light emitting surface of the polarized light...

Embodiment 2

[0022] Embodiment 2 has the same structure as Embodiment 1 except the following differences: red light pyramid 211 and red light polarizer 212, green light pyramid 221 and green light polarizer 222, blue light pyramid 231 and blue light polarizer 232 The three have exactly the same structure.

Embodiment 3

[0023]Embodiment 3 has the same structure as Embodiment 1 except for the following differences: between the red light pyramid 211 and the red light polarization beam splitter prism 31, there are red light small polarization beam splitter prism 2121, red light small rectangular prism 2122 and The red light 1 / 2 wave plate 2123, the S polarized light output surface of the small red light polarizing beam splitter prism 2121 is parallel to the red light small polarizing beam splitting prism 2121 and the red light small rectangular prism 2122. A right-angle surface of the right-angle prism 2122 is glued, the red light 1 / 2 wave plate 2123 is glued with the P-polarized light exit surface of the red light small polarization beam splitter prism 2121, the light exit surface of the red light pyramid 211 is glued to the entrance of the red light small polarization beam splitter prism 2121 The shape and size of the light surface are the same, the red light pyramid 211 is optically coupled wi...

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Abstract

An LED lighting system used for a mini LCOS projector belongs to the photoelectric lighting and display technique field and comprises three-color-light LED polarized-light generators, three-color-light polarization beam-splitting prisms and three-color-light reflective liquid crystal plates. The polarized-light generator of each color comprises an LED light source, a pyramid and a polarizer which are sequentially arranged in an optical-axis coincident manner. The shape and size of exit face of the polarized-light generator of each color are fully identical to the shape and size of incident face of the polarization beam-splitting prism of each color. The polarized-light generator of each color is coupled with the polarization beam-splitting prism of each color in a manner that the exit face of the polarized-light generator of each color coincides with the incident face of the polarization beam-splitting prism of each color. The LED lighting system has the advantages that the availability of light energy is high; the optical system is simple; the structure is compact; the volume is small and the cost is low, etc. The LED lighting system is especially favorable for manufacturing mini projectors.

Description

technical field [0001] An LED light source lighting system for a small LCOS projector belongs to the technical field of photoelectric lighting and display. Background technique [0002] In the background technology, there is a lighting system for a three-chip LCOS projector, which includes a UHP light source, a light rod, a relay lens, a dichroic mirror, a reflector, a prepolarizer, a polarization beam splitter prism, an LCOS chip, and an X-type color combining prism. , projection lens. See figure 1 . Its working principle is: after the light emitted from the UHP light source passes through the light bar and is homogenized, it passes through the relay lens, the dichroic mirror, and the reflector to form red, green and blue three-color light, and the three-color light passes through their respective pre-polarizers Its polarization state is S polarized light relative to the respective polarization beam splitters. When passing through the respective polarization beam splitte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20G03B21/14G02B27/28G02B27/10H04N9/31
Inventor 楼云中辜长明郑耀沈荣桂刘啸虎毛荣壮
Owner SHANGHAI FOREAL OPTOELECTRONICS
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