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A Method for Detecting the Decay of Fluorescent Wheel Powder Based on Fluorescence Spectrum

A fluorescence spectrum and fluorescence wheel technology, applied in the field of single DLP laser projection display, can solve the problem of not considering the influence of color conversion rate projection display image, etc., to meet the needs of rapid detection, the method is simple, fast and easy to operate, and the effect of high sensitivity

Active Publication Date: 2022-02-01
SICHUAN CHANGHONG ELECTRIC CO LTD
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Problems solved by technology

[0003] Existing solutions to the projection display screen, there are many studies on the size of the light rod, the size of the lens, and the number of lenses, and the influence of the excitation light intensity on the color conversion rate of the phosphor on the fluorescent wheel on the projection display screen has not been considered.

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  • A Method for Detecting the Decay of Fluorescent Wheel Powder Based on Fluorescence Spectrum

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Embodiment 1

[0019] Such as figure 1 As shown, the present invention provides a method for detecting the decay of fluorescent wheel powder based on fluorescence spectrum. Fluorescence spectrum acquisition equipment 11 respectively collects the fluorescence spectrum of the same phosphor powder area on the fluorescent wheel 12 after being irradiated by different excitation light intensities, and After being irradiated with the same excitation light intensity, the fluorescence spectra of different phosphor powder regions on the phosphor wheel 12 : yellow phosphor powder region 21 , green phosphor powder region 22 , and red phosphor powder region 23 . At the same time, the computer 13 will respectively present the fluorescence spectrum of the yellow phosphor area, the fluorescence spectrum of the green phosphor area, and the fluorescence spectrum of the red phosphor area. Use the second-order derivation to convert all the fluorescence spectral data into the fluorescence spectral data of the se...

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Abstract

The invention discloses a method for detecting the decay of fluorescent wheel powder based on fluorescence spectrum, by measuring the fluorescence spectra of different phosphor powder regions on the same fluorescent wheel irradiated by the same excitation light intensity and measuring the fluorescence spectrum of different phosphor powder regions on the same fluorescent wheel irradiated by different excitation light intensities. Fluorescence spectrum of the same phosphor area, analyze the change of fluorescence light intensity of phosphor with the intensity of excitation light intensity, and obtain the excitation light intensity that affects the color conversion efficiency of phosphor powder, thus providing a certain theoretical basis for the heat dissipation design of the phosphor wheel, and for fluorescence The preparation of wheel powder has positive guiding significance.

Description

technical field [0001] The invention relates to the field of single DLP laser projection display, in particular to a method for detecting the decay of fluorescent wheel powder based on fluorescence spectrum. Background technique [0002] At present, in a single DLP laser projection device, a fluorescent wheel is generally used to excite the laser light incident on the laser source to generate a required color light sequence. The fan-shaped phosphor area on the phosphor wheel that participates in light color conversion, under long-term high-intensity laser irradiation, the chromaticity and brightness of the phosphor converted color will inevitably fluoresce as the temperature of the excitation light in the laser projection device increases. The attenuation of the powder conversion color efficiency leads to the existence of defects that affect the subjective effect such as low contrast and bright colors of the laser projection display screen. When the temperature exceeds a ce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/64G01N2021/6417
Inventor 王悦铮康健姜银磊王航
Owner SICHUAN CHANGHONG ELECTRIC CO LTD