Three-colour luminous diode multi light source lighting device

Abstract

A three-colored light emitting diode multi-light source, lighting device used in digital display system, LED substrate , collimating support, mixed light tube and fosted glass, micro display panel, zooming projection lens and photographic paper are orderly installed on the same optical axial, is fixed on LED substrate in square matrix and has the same distance to each other, square matrix lens is embed in the collimating support under the LED substrate in square matrix and each light emitting diode has the corresponding axial of square matrix lens on its focus to reduce the angle of divergence, decreasing the optical energy loss. The light beam projection port of mixed light tube has frosted glass embedded with the angle of 45deg.C for increasing evenness of optical fiel, and there is a zooming projection lens placed among the micro display panel and photographic paper. The advantages are long service life and colorful vivdness.

Description

technical field [0001] The invention relates to a three-color light-emitting diode multi-light source lighting device, which is a multi-light source lighting system composed of multiple groups of red, green and blue three-color light-emitting diodes (LEDs), and is used for a digital exposure system of a digital imaging system Provide lighting, mainly including digital exposure based on LCD (liquid crystal), LCOS (liquid crystal on silicon), DLP (digital light processor) and other micro-display panels, belonging to the field of LED optical lighting technology. technical background [0002] At present, domestic digital imaging is mainly based on digital exposure system of liquid crystal. The light source of this technology adopts gas discharge lamp with high luminous power. Abroad is mainly based on laser scanning, fluorescent tube technology, low light valve technology and digital light control technology. [0003] In the laser digital imaging system, the blue and green lase...

AI Technical Summary

Problems solved by technology

[0007] In the above-mentioned digital imaging system, the light source is roughly divided into: laser light source and gas discharge lamp or halogen tungsten lamp. The high light energy output can well meet the requirements of digital imaging for luminous flux, but there are many shortcomings in using this light source for digital imaging, mainly as follows: (1) The light source has a lot of heat, and the heat is extremely concentrated, The problem of heat dissipation must be well solved; (2) the life of the light source is very short, usually only a few hundred to a few thousand hours; (3) the price of the light source is very expensive; (4) the light source usually emits white light, in order to process the color signal , the projection system must have a color separation device to decompose white light into red, green, and blue primary color light, and the three primary color light is processed, plus an image signal, and then synthesized into a color image by a color combining device; (5) the light source emits The spectral distribution of white light does not meet the requirements of color balance. In order to meet the requirements of color balance, the method of suppressing strong color light is usually adopted, which leads to the decline of light energy utilization rate. Between the light source energy utilization rate and color balance (6) In traditional digital imaging systems, white light is decomposed into three primary color lights by color separation devices. In order to improve energy utilization, the three primary colors of red, green, and blue usually use as large a spectral channel as possible, but The larger the spectral channel, the less vivid the color, and there is a contradiction between the energy utilization rate and the bright color requirements; (7) Due to the above reasons, it also leads to the complexity of the digital imaging structure and the reduction of reliability

[0008] Light-emitting diodes have the advantages of high luminous efficiency, low heat generation, and pure luminous color. The biggest disadvantage is that the luminous power is too low to meet the requirements of digital imaging for optical power.

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