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Light source switching mechanism used for projection system

A technology of light source switching and projection system, applied in projection devices, optics, nonlinear optics, etc., can solve the problems of complex component configuration, slow light source switching speed, and bulky volume.

Inactive Publication Date: 2009-07-01
DELTA ELECTRONICS INC
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Problems solved by technology

[0008] To sum up, the LED light source configuration of the existing projection system has problems such as discontinuous luminous flux, slow light source switching speed, bulky volume and complex component configuration. In view of this, a fast switching light source, small size and A light source system with simple configuration of the overall components is the common goal of the industry.

Method used

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  • Light source switching mechanism used for projection system
  • Light source switching mechanism used for projection system
  • Light source switching mechanism used for projection system

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Embodiment Construction

[0020] The first embodiment of the present invention is a light source switching device 2, which includes a first light guiding device 21, a second light guiding device 23 and a switchable phase device 25, such as Figure 2A and Figure 2B shown. The light source switching device 2 is used in a projection system (not shown), which has a first LED assembly 20 and a second LED assembly 22, suitable for alternately providing a first light 200 and a second light 220 . Each LED assembly has a red LED (not shown), a blue LED (not shown) and a green LED (not shown). The first light 200 and the second light 220 are provided alternately according to a time sequence. In this embodiment, the first light 200 and the second light 220 are both complementary and alternately provide light according to a 50% time sequence.

[0021] The first light guiding device 21 includes a first polarizing device 211 and a first reflecting device 213 adjacent to the first polarizing device 211 . The fir...

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Abstract

The invention relates to a light source switching device for a projection system, which comprises at least two light guidance devices and at least one phase switching device. The phase switching device arranged between the two light guidance devices is provided with a first switching state and a second switching state. When the first light enters the light source switching device, the phase switching device is located in the first switching state to enable the first light to emit outwardly appropriately, when the second light enters the light source switching device, the phase switching device is located in the second switching state to enable the second light to emit outwardly appropriately. Therefore, through switching actions of the phase switching device, a plurality of light provided by a plurality of light sources can be selected, and can be uniformized by the light source switching device.

Description

technical field [0001] The present invention relates to a light source switching device for a projection system, more particularly, to a light source switching device capable of selecting different light sources according to a specific time sequence to provide the light source to the projection system. Background technique [0002] In order to save power consumption and device volume, many projection systems gradually adopt light emitting diodes (LEDs) as light sources. Light-emitting diodes have the advantage of short start-up time. When used in projection systems, they can solve the problem that traditional high-pressure mercury lamp projection systems cannot start up quickly. Since the use of the light source is limited by the conservation of the etendue (étendue), it means that only a limited area of ​​the light source and a light angle can be effective light. When it is desired to increase the brightness of the light source of the projection system, it is not only by i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01G03B21/14
Inventor 黄俊杰
Owner DELTA ELECTRONICS INC
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