Double-lamp illumination device and projector

A lighting device and a pair of technology, applied in the field of projection, can solve the problems of low light energy utilization rate of lighting devices, inconvenient heat dissipation design, etc., and achieve the effects of avoiding interference loss, simple structure, and improving utilization rate
CN102809882AActive Publication Date: 2012-12-05WUHU AMT MICRO DISPLAY TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
WUHU AMT MICRO DISPLAY TECH
Publication Date
2012-12-05

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Abstract

The invention is suitable for the field of projection and provides a double-lamp illumination device and a projector. The device comprises two white light sources arranged in parallel, wherein a color wheel is arranged in the light emergent direction of the two white light sources, and comprises a plurality of pairs of filters; each pair of filters is symmetrical about the center of the color wheel and has the same filtering wave band, so that light output after light emitted by the two white light sources passes through any pair of filters has the same color; and a light equalizing system capable of directly receiving the output light of any pair of filters is arranged in an output light path of the color wheel. The light emitted by the two light sources is coupled in the light equalizing system in different spaces in a non-superposing mode by the color wheel with a symmetrical structure, so that the light energy utilization rate is increased; and the light equalizing system is high in light receiving capability, so that the device is high in light energy utilization rate and projection brightness. In addition, the positions of a first light source and a second light source are not required to be strictly limited, so that the device is conveniently radiated.
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Description

technical field

[0001] The invention belongs to the technical field of projection, and in particular relates to a double-lamp illuminating device and a projector including the device. Background technique

[0002] In the current digital light processing (DLP) dual-lamp projection lighting system, the light bar is mostly used for uniform light shaping, and the light emitted by the light source is usually coupled into the light bar through reflectors and other devices. Due to the relatively narrow space at the coupling end, this type of lighting system is prone to interference loss and low coupling efficiency. In addition, due to the small size of the entrance area of ​​the light rod, which is usually smaller than the size of the incident spot, the light cannot fully enter the light rod. Therefore, the optical coupling efficiency of this system is low, which affects the projection brightness; in addition, when the light rod collects light, the light must be focused on the ligh...

Claims

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