Light sources, projection display devices and lamps

Abstract

The invention provides a light source and a projection display device and a lamp thereof. The light source comprises a first excitation source, a second excitation source and a wavelength conversion wheel, the wavelength conversion wheel comprises a wavelength conversion layer and a first reflective polarizing film which are arranged in laminated mode, and the wavelength conversion wheel further comprises a first driving device for driving the wavelength conversion layer and the first reflective polarizing film to rotate. The first excitation source and the second excitation source are respectively in incident at a first position and a second position of the wavelength conversion wheel to excite the wavelength conversion layer so as to enable a first light with a first polarization direction and a second light with a second polarization direction to be emitted out from the first position and the second position respectively, and the first light and the second light form combined light at the position of a polarization light combining device. According to the light source, the projection display device and the lamp, polarization characteristics of the first light and the second light are utilized, the first light and the second light are combined into one beam by using the polarization light combining device, and luminance is improved greatly.

Description

technical field [0001] 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 [0002] 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. [0003] 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 solution greatly reduces the calorific value and temperature of the local phosphor, thereby greatly increasing the upper limit of the energy density of the excitation light received. Make bright light possible. [0004] Even with this approach, ...

AI Technical Summary

Problems solved by technology

[0004] 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

Images