Panasonic Intellectual Property Management Co., Ltd.

Yohei Katsumata

Yoshimasa Fushimi

Masato Tanaka

Atsushi Motoya

Manabu Okuno

Shouichi Yoshii

A light source deviceincludes light source unitsto, lenses, and, and mirrorsand. Light source unitsand/or light source unitsare placed such that the light from unitstoeither enters lensat a position deviated from the optical axis of lensor enters lensat a position deviated from the optical axis of lens

Light source device and projection display apparatus

The projection image display apparatus of the disclosure includes a light source, a projection optical system that projects light entering an incident port, an optical modulator element, and wavelength selection filter. The optical modulator element includes multiple mirrors on its base. These mirrors are driven to switch, based on an image signal, between the ON state for reflecting a light entering from a light source toward the incident port of the projection optical system and the OFF state for reflecting a light entering from the light source in a direction other than the incident port of the projection optical system. In light entering from the light source to irradiate the optical modulator element, the wavelength selection filter reflects a light wavelength component that will be planar reflection light after being reflected on the base and entering the incident port of the projection lens.

Projection image display apparatus for reducing unnecessary light in the projected image

A phosphor wheel device includes a phosphor and a substrate which has a disc shape and on which the phosphor is provided, and the phosphor is provided in at least a portion of a circumference of a circle on the substrate. The circle is centered on the center of a rotational shaft of the substrate. The substrate includes a first opening and a plurality of second openings, and the plurality of second openings extend radially with respect to the center of the rotational shaft.

Phosphor wheel device and projector-type image display apparatus

A light source device and a projection type display apparatus include: an excitation light source; and a fluorescence light-emitting plate including a fluorescence light-emitting section arranged opposite to the excitation light source and a reflection section containing titanium oxide located on the opposite side of the excitation light source as viewed from the side of the fluorescence light-emitting section and arranged such as to be joined to the fluorescence light-emitting section. Then, excitation light from the excitation light source is projected onto the fluorescence light-emitting section so that fluorescence emission light is emitted from the fluorescence light-emitting section and reflected fluorescence light is emitted from the reflection section.

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Osaka, Japan

Yohei Katsumata