Light source device and projection display device

Abstract

A light source device according to an embodiment of the present disclosure includes: a light source part including a first light source and a second light source, the first light source emits light in a first wavelength range, and the second light source communicates with the first light source. Emitting light in a second wavelength range in the same direction as the light in the wavelength range, the second wavelength range being different from the first wavelength range; a wavelength converter, the wavelength converter is excited by the light in the first wavelength range to emit fluorescence; light concentrating a concentrator that concentrates light in a first wavelength range and light in a second wavelength range on the wavelength converter; and a multiplexer that is wavelength selective, wherein Transmitting the light of the first wavelength range and reflecting or transmitting at least a part of the light of the second wavelength range according to the angle of incidence of the light of the first wavelength range and the light of the second wavelength range, and combining the light of the first wavelength range, the second wavelength range of light and the fluorescence.

Description

technical field [0001] The present disclosure relates to a light source device including, for example, a phosphor wheel, and a projection-type display device including the light source device. Background technique [0002] In recent years, light source devices using, for example, laser diodes (LDs) and phosphors have been developed for projection-type display devices (projectors). A light source device for a projector uses a system in which a Ce-YAG (Cerium:Yttrium-Aluminum-Garnet) phosphor is excited to emit fluorescence and obtains red light and green light from the fluorescence. However, the color gamut in this system is about 60% as narrow as in the BT2020 standard. Furthermore, in the case where display is performed using D65, which is defined as a white point in the sRGB standard, the red light component of fluorescence is rate-limited. [0003] In contrast, for example, PTL 1 discloses a light source device in which a laser light in a blue wavelength range is a ligh...

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Problems solved by technology

However, the color gamut in this system is about 60% narrower than in the BT2020 standard

Furthermore, in the case where display is performed using D65 which is defined as the white point in the sRGB standard, the red light component of fluorescence is rate-limited

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