Light source, projection display apparatus and lamp

Abstract

The invention provides a light source, a projection display apparatus and a lamp. The light source comprises a first excitation source and a second excitation source, and also comprises a wavelength conversion wheel; the wavelength conversion wheel comprises a wavelength conversion layer and a first reflective type polarizing film which are arranged in a stacked manner; the wavelength conversion wheel also comprises a first driving apparatus used for driving the wavelength conversion layer and the first reflective type polarizing film to turn; first excitation light and second excitation light are incident to a first position and a second position of the wavelength conversion wheel respectively to excite the wavelength conversion layer so as to emit first light with a first polarizing direction and second light with a second polarizing direction from the first position and the second position respectively; and the first light and the second light form mixed light in a position of a polarizing light mixing apparatus. According to the light source, the projection display apparatus and the lamp disclosed by the invention, based on the polarization property of the first light and the second light, the first light and the second light are combined into one beam through the polarizing light mixing apparatus, so that the luminance is greatly improved.

Description

[0001] This application is a divisional application based on the patent application with the application number 201210190879.1, the title of the invention is "Light Source, Projection Display Device and Lamp", and the filing date is 2012-06-11 technical field [0002] The invention relates to the field of light sources, in particular to a high-brightness light source, a projection display device and a lamp based on the light source. Background technique [0003] At present, there is an increasing demand for high-brightness light sources in various fields, such as the fields of projection display and projection lighting, which require high luminance of the illumination source. [0004] A currently feasible solution is to use excitation light to excite a high-speed rotating fluorescent pink wheel to generate high-brightness stimulated light. Due to the high-speed rotation of the color wheel, the local phosphor is excited and generates heat only in an instant. Therefore, this s...

AI Technical Summary

Problems solved by technology

[0005] However, even with this scheme, there is still an upper limit to the energy density of the excitation light: once this limit is exceeded, the efficiency of the phosphors on the color wheel drops rapidly

Therefore, the luminous brightness of this scheme is still limited by this upper limit, and at the same time, a light source with higher brightness is required on the market

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