Assembly and method for generating mixed light

Abstract

At least two semiconductor components emit electromagnetic radiation in different wavelength ranges. The superimposition of these electromagnetic radiations of all semiconductor components has at least one fraction in the visible wavelength range. At least one of the semiconductor components has a luminescence conversion element in the beam path.

Description

technical field [0001] The present invention relates to an apparatus and method for generating mixed light using a plurality of semiconductor devices. Background technique [0002] In image reproduction or projection technology, mixed light sources for electromagnetic radiation of different wavelengths, that is to say sources such as white light sources, are used as light sources, in particular as background lighting. As fields of application, LCD projection and image reproduction technology are mentioned here, for example. Here, this mixed light is used to illuminate a liquid crystal matrix in an image reproduction system or projection system. Such a matrix has a large number of individual liquid crystals. These liquid crystals become transparent depending on the applied control voltage and the wavelength of light passing through the liquid crystal. This liquid crystal matrix is ​​often called a light modulator. By illuminating the light modulator with mixed light, the ...

AI Technical Summary

Problems solved by technology

The already mentioned control of the light modulator in the projection system is changed in that the spectral distance between the green-emitting and blue-emitting semiconductor components is narrowed and the two colors are also cut off in the light modulator by means of a dielectric wavelength-selective or bandpass filter or mirror separation becomes difficult and costly

[0010] Another important disadvantage in the case of wavelength drift is the significantly worse energy efficiency and the associated worse efficiency

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