LED projection light source with spectrum reconstitution and projection engine thereof

A technology of projection optics and projection, applied in the field of projection light sources, can solve problems such as low luminous efficiency, improper engine design, and spectral recombination of projection light sources without white light LED arrays.

Inactive Publication Date: 2010-01-27
成都欧恒光电科技有限公司
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Problems solved by technology

RGB (red, green and blue) LEDs can be mixed into white light and recombine the spectrum, but the luminous efficiency of RGB color LEDs is lower than that of white LEDs, and improper engi

Method used

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  • LED projection light source with spectrum reconstitution and projection engine thereof
  • LED projection light source with spectrum reconstitution and projection engine thereof
  • LED projection light source with spectrum reconstitution and projection engine thereof

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specific Embodiment

[0023] in the attached figure 1 Among them, 101 is 5 green LEDs, 102 is 2 orange-red LEDs, 103 is 12 white LEDs, and 104 is a metal-based printed circuit board (MCPCB) for installing the LED array. in the attached figure 2 Among them, 201 is the spectral curve of the transmittance of the CF film, and 202 is the energy spectral curve of the white LED. Before the recombination of the visible spectrum, in most wavelength regions of visible light, the energy spectral peak of the white LED does not correspond to the peak of the transmittance spectrum of the CF film. Therefore, the transmittance is low, and the color reproduction rate of green and red light is also low. . in the attached image 3 Among them, 201 is still the spectral curve of the transmittance of the same CF film, and 302 is the energy spectral curve of the white LED after spectral recombination. It can be seen that by using the corresponding fitting method, the transmittance, as well as the color reproduction ...

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Abstract

The invention belongs to a projection light source, a projection optical system and projection display equipment. A color light LED replaces a white light LED to realize spectrum reconstitution in a proper position in a white light LED projection light source, and the type and the quantity depend on spectrums and design requirements. In the projection optical engine, a fly eye lens array divides discrete light beams emitted by a white light and color light LED mixed array into tens of to hundreds of small light beams, and a field lens overlays the small light beams onto an LCD screen one by one. A white light spectrum illuminating the LCD screen is different from that of a full white light LED array. A reconstituted LED light source spectrum correspondingly fits with a spectrum of a CF film so as to improve light output, luminance and chromaticity uniformity, and color reappearance rate and change color temperature. The projection light source and the projection engine maintain the basic advantages of long service life, quick response, easy driving, no radiant heat, high lighting effect of the light source, energy saving, environmental protection and the like of LED projection. A projection device applying the projection light source and the optical engine certainly has the advantages.

Description

technical field [0001] The invention patent belongs to projection light source, projection optical system and projection display equipment. The patent particularly relates to a spectrally recombined white LED array projection light source, an LCD projection optical engine characterized by a fly-eye lens array and CF (color filter) film color mode, and a projection device using the optical engine. Background technique [0002] Front projection devices such as video projectors use TFT-LCD with CF film as the imaging device. It is mainly used in entertainment venues and home theaters, and can also be used as games and toys. The annual demand in the global market is millions of units. In the past, it used metal halide lamps as projection light sources for a long time; in recent years, it has also begun to use LED projection light sources. [0003] This type of projector is cheap and practical, and is welcomed by the market. After switching to LED projection light source, it ha...

Claims

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Application Information

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IPC IPC(8): G03B21/20G03B21/14G02F1/1335
Inventor 范朝勋霍永峰
Owner 成都欧恒光电科技有限公司
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