Seiko Epson Corporation

Katsumitsu Hama

Chiyoaki Iijima

Kazuhiro Nishida

Takayuki Matsubara

Yuta Ito

Noriyuki Hirano

Tomohiro Takagi

Noriko Imae

A light source device includes: a light source section emitting excitation light; homogenizer optical element; first condensing element converging the excitation light; wavelength conversion element on which the converged excitation light is incident and that emits fluorescent light; and light separation element. The light source section, homogenizer optical element, and light separation element are disposed on a first illumination optical axis. The light separation element emits at least a portion of the excitation light incident from the homogenizer optical element toward the first condensing element, and emits the fluorescent light incident from the wavelength conversion element through the first condensing element in a direction of a second illumination optical axis intersecting the first illumination optical axis at the light separation element, the homogenizer optical element includes first and second multi-lenses, and the first and second multi-lenses are movable along an orthogonal plane with respect to the first illumination optical axis.

Light source device, illumination device, and projector

A light source apparatus includes a first light source section that outputs blue light along a first illumination optical axis,the second light source section are arranged side by side and outputs excitation light along a second illumination optical axis substantially parallel to the first illumination optical axis, a reflection member that reflects the excitation light in such a way that the reflected excitation light travels along a third illumination optical axis that intersects the first illumination optical axis and the second illumination optical axis, a wavelength converter on which reflects converted light having a wavelength different from a wavelength of the excitation light, and a light combiner that is located in the position where the first illumination optical axis and the third illumination optical axis intersect each other and transmits the blue light and the excitation light but reflects the converted light.

Light source apparatus and projector

An electro-optical display device includes: a reflection-type liquid crystal panel that has a driving substrate, on which a reflective layer is disposed, and an opposing substrate facing each other with a liquid crystal interposed therebetween; and an light-transmissive substrate that is disposed on an outer side of the opposing substrate, wherein any one or more values of thermal expansion coefficients of a plurality of element substrates including at least the opposing substrate and the light-transmissive substrate are negative, and any one or more values of the thermal expansion coefficients of the plurality of element substrates are positive.

Electro-optical display device and projector

An electro-optical display device includes: a transmission-type liquid crystal panel that has a driving substrate and an opposing substrate facing each other with a liquid crystal interposed therebetween; a first light-transmissive substrate that is disposed on an outer side of the driving substrate; and a second light-transmissive substrate that is disposed on an outer side of the opposing substrate, wherein any one or more values of thermal expansion coefficients of a plurality of element substrates including at least the driving substrate, the opposing substrate, the first light-transmissive substrate, and the second light-transmissive substrate are negative, and any one or more values of the thermal expansion coefficients of the plurality of element substrates are positive.

Growing community of inventors

Matsumoto, Japan

Katsumitsu Hama