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Light module and method for providing wavelength-converted light in the red spectral range and projection device therefor

A spectral range and wavelength conversion technology, applied in the field of optical modules, can solve problems such as limiting the service life of luminescent materials, and achieve the effects of low quenching, efficiency improvement, and high conversion efficiency

Active Publication Date: 2016-06-29
CORETRONIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Small changes in operating conditions can sensitively limit the lifetime of luminescent materials

Method used

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  • Light module and method for providing wavelength-converted light in the red spectral range and projection device therefor
  • Light module and method for providing wavelength-converted light in the red spectral range and projection device therefor
  • Light module and method for providing wavelength-converted light in the red spectral range and projection device therefor

Examples

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Embodiment Construction

[0053] In contrast to the use of cerium-doped garnet phosphors (YAG, LuAG, YAGaG, LuAGaG, LuYAG, LuYAGaG) according to the prior art, the use of silica garnet phosphors according to the formula

[0054] (AE 3-x-y Lu x Ce y )(Mg 1-z Sc z ) 2 (Si 1-q Ge q ) 3 O 12

[0055] A much higher efficiency is provided for filtered red light, since the emission is shifted considerably towards higher wavelengths compared to phosphors according to the prior art. Therefore, much less must be filtered from the yellow side of the spectrum in order to obtain red light.

[0056] this is in Figures 1 to 3 For YAG:Ce according to prior art and for CaLu of silica garnet luminescent material 1.94 Ce 0.06 Mg 2 Si 3 O 12 A sample of the example is shown.

[0057] figure 1 Shows the first emission spectrum 1 of the YAG:Ce luminescent material and the silica garnet luminescent material CaLu 1.94 Ce 0.06 Mg 2 Si 3 O 12 The second emission spectrum of 2. Here, the wavelength λ in...

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Abstract

The invention relates to a light module (12) which is used for providing light in the red spectrum range, wherein the light has a first main wavelength and has the preset output spectrum (11s). The light module (12) may include a conversion part (18), which is designed to absorb excitation radiation having a first wavelength of an absorption spectrum and to convert it into light having a second wavelength of an emission spectrum (9s). The light module includes an excitation radiation source designed to emit excitation radiation. The excitation radiation source is arranged in such a way that emitted excitation radiation can be radiated at least indirectly onto the conversion part (18). The light module includes a spectral filter (28) having a long-pass filter characteristic (30) and having a limiting wavelength. The spectral filter (28) is designed and arranged to reduce the emission spectrum (9s) having the second dominant wavelength to the output spectrum (11s) having the first dominant wavelength. The conversion means has an emission spectrum having a red spectral component and having a second dominant wavelength and having a full width at half maximum of at least 120 nm.

Description

technical field [0001] The invention is a light module for generating wavelength-converted light in the red spectral range by means of a converter, a projection device with such a light module, and a method for providing wavelength-converted light in the red spectral range . Background technique [0002] Methods and light modules are known from the prior art for generating wavelength-converted light by means of a conversion element, such as a phosphor, wherein excitation light, such as monochromatic light from a laser diode, is incident on the phosphor and the phosphor emits light with converted , usually larger wavelengths of light. The problem known to arise in phosphors is that the conversion efficiency decreases with increasing pump power and pump power density of the excitation light. An increase in the pump power leads to an increase in the average temperature and, via the temperature dependence of the conversion efficiency, to a saturation of the output power (therm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V9/10F21K9/64G03B21/00F21Y115/30F21V9/40
CPCF21V9/40G03B21/00G03B21/204G03B33/08F21S10/02
Inventor 丹尼尔·比希勒
Owner CORETRONIC