Seiko Epson Corporation

Seiko Epson Corporaition

Sieko Epson Corporation

Norio Nakamura

Hiroyuki Suemori

Katsumi Tsukada

Tomio Kamihata

Mutsuaki Yamazaki

Minoru Nimura

Yasushi Mizoguchi

Shuichi Wakabayashi

Hirokazu Yamaga

Toru Kurihara

Nobuaki Hashimoto

Hiroshi Kobayashi

Koichi Akiyama

Akira Hashimoto

Kaname Nagatani

Norikazu Kadotani

Hiroyuki Yoda

Wataru Yasumatsu

Norio Imaoka

Toshiyuki Hosaka

Hiroyuki Yamashita

Kazuaki Inoue

Makoto Furusawa

Hiroshi Sugai

Hiroki Sakai

Yuta Tokuno

Kazuyoshi Noake

A light source device according to the present disclosure includes a light source section, a first polarization split element for transmitting first light with a first polarization direction from the light source section and reflecting the first light with a second polarization direction, a first retardation element, a second polarization split element for reflecting the first light in the second polarization direction from the first retardation element, a second retardation element, and a light conversion device having a diffusion element for diffusing the first light from the second retardation element, a first wavelength conversion element for performing wavelength conversion on the first light to emit second light, and a substrate.

Light source device, projector, and display device

A projector according to the present disclosure includes an illuminator that outputs light, a light modulator including a liquid crystal panel that modulates the light from the illuminator in accordance with image information, and a projection optical apparatus that projects image light modulated by the light modulator. The liquid crystal panel includes a display unit on which the light from the illuminator is incident, a light blocking film having a light transmissive area provided in correspondence with the display unit, and a lens that collects the light into a spot in the light transmissive area. The display unit has a first area and a second area in the light transmissive area, the second area providing light transmittance higher than light transmittance provided by the first area. The illuminator outputs the light in such a way, that the lens collects the light into a spot in the second area.

Projector

A wavelength conversion element according to the present disclosure includes a cemented body obtained by bonding a first wavelength conversion member which is excited by first light to emit second light having a wavelength band different from a wavelength band of the first light, and a first light guide member configured to transmit the first light and the second light, and a reflecting member which is disposed so as to be opposed to at least one surface parallel to a first direction out of a plurality of outer circumferential surfaces of the cemented body, and reflects at least one of the first light and the second light.

Wavelength conversion element, light source device, and projector

An optical module includes a light modulator that modulates light and includes a plurality of pixels, and a pixel shift mechanism. The pixels of the light modulator each include a first sub-pixel on which a first or a second color light flux is incident, a second sub-pixel on which a color light flux different from the color light flux incident on the first sub-pixel out of the first and the second color light flux is incident, and a third sub-pixel and a fourth sub-pixel on which a third color light flux is incident. The pixel shift mechanism transition to a first state in which the third sub-pixel is located on a first position and the fourth sub-pixel is located on a second position, or a second state in which the third sub-pixel is located on a third position and the fourth sub-pixel is located on a fourth position.

Optical module having pixel shifting mechanism transitioning to first state or second state, method for controlling the same, and projection-type display apparatus

An optical module includes a light modulator that modulates light and includes a plurality of pixels, and a pixel shift mechanism. The light modulator is driven based on an interlace method. The pixels of the light modulator each include a first sub-pixel on which a first color light flux or a second color light flux is incident, a second sub-pixel on which a color light flux different from the color light flux incident on the first sub-pixel out of the first color light flux and the second color light flux is incident, and a third sub-pixel and a fourth sub-pixel on which a third color light flux is incident. The third sub-pixel and the fourth sub-pixel are arranged in a scan direction of the light modulator. The pixel shift mechanism shifts the light modulator in a direction that intersects the scan direction.

Optical module, method for controlling the same, and projection-type display apparatus

An optical module includes a light modulator that modulates light and includes a plurality of pixels, and a pixel shift mechanism. The pixels of the light modulator each include a first sub-pixel on which a first color light flux is incident, a second sub-pixel on which a second color light flux is incident, a third sub-pixel on which a third color light flux is incident, and a fourth sub-pixel on which one of the first color light flux, the second color light flux, and third color light flux is incident. The pixel shift mechanism includes a first state, a second state, and a third state. The first color light flux is incident on the fourth sub-pixel in the first state. The second color light flux is incident on the fourth sub-pixel in the second state. The third color light flux is incident on the fourth sub-pixel in the third state.

As an electro-optical device, a liquid crystal device includes micro lenses ML each of which is provided as a light-gathering element for the corresponding one of pixels, and further includes a light-shielding portion. Red (R), green (G), and blue (B) beams enter the micro lens ML at angles different from one another. The light-shielding portion partitions off a first opening portion corresponding to a sub pixel, a second opening portion corresponding to a sub pixel, and a third opening portion corresponding to a sub pixel from one another. When the width of the first opening portion in the predetermined direction (X direction) is defined as Land when the width of the second opening portion or the third opening portion in the predetermined direction is defined as L, a relationship of L&#x3c;Lholds true.

Electro-optical device comprising first, second, and third color beams having different incident angles relative to a light gathering element and electronic apparatus

A projector () includes a light source device (), a light modulating device () configured to modulate a light beam emitted from the light source device, a projection optical device () configured to project the light beam modulated by the light modulating device, and a flexible printed circuit board (), one end of which is connected to the light modulating device (). The light source device () includes a light emitting device mounted on the flexible printed circuit board (). The flexible printed circuit board is bent, whereby the light source device is disposed in an emission position where the light source device () emits the light beam to the light modulating device ().

Projector with flexible printed circuit board for light source

An image forming apparatus includes: a projector configured to be capable of projecting light to thereby display an image on a rendering region formed on a display surface set around a guiding point to which a person should be guided and changing a position of the rendering region; a detecting unit that detects whether a person is present in a detection region set near the display surface and detects, when a person is present in the detection region, a moving state of the person; and a control unit that controls, on the basis of a detection result of the detecting unit, driving of the projector to guide the person present in the detection region to the guiding point.

Image forming apparatus for projecting an image to guide an individual

An image forming apparatus includes a light emitting unit that emits light; a light scanning unit having at least one actuator, wherein the actuator irradiating and scanning the light reflected on a light reflector onto an image forming plane by rotation of a movable plate; a drive pattern generating unit that generates a drive pattern of the light emitting unit, wherein the light emitting unit can emit the light with emission timing and emission time to suppress density of the pixels in each portion of the image to be formed on the image forming plane from becoming ununiformity; and a controlling unit that controls operation of the light emitting unit based on the drive pattern generated by the drive pattern generating unit.

Image forming apparatus

An image display device having a screen having a fluorescent region including a fluorescent material; a light irradiation system, including a first light source outputting excitation light exciting the fluorescent material; a second light source outputting visible light; a scanning unit scanning with a light beam output from each of the first light source and the second light source on the screen; and an excitation light wavelength band reflector reflecting light in a wavelength band of the excitation light toward the screen, and formed on an output side of a light beam from the light irradiation system with respect to the screen. The visible light output from the second light source is diffused by the screen, while the excitation light output from the first light source develops a color different from that of the visible light by being projected in the fluorescent region.

Image display device having a screen with a fluorescent region

A display apparatus includes: a light modulator having translucent windows; a light emitter having a light source; a light guide having a tubular reflecting surface guiding light source light to the light modulator; and a light separator having a light separation surface separating guided light into transmitted and reflected light. The tubular reflecting surface narrows from the light modulator toward the light emitter to guide the reflected light to the windows. Denoting a lateral cross-sectional area of an inside area of the tubular reflecting surface at a light source end as S, a lateral cross-sectional area of the tubular reflecting surface at a light separation surface end as S, and a maximum incident angle at which light from the light source reflected by the tubular reflecting surface is input to the light separation surface as &#x3b8;, &#x3b8;&#xd7;&#x221a;(S/S)&#x2267;110.

Display apparatus having a tubular reflecting surface

A light scanning device includes a light source outputting a laser beam, a light deflecting unit having a light reflecting unit, the light deflecting unit being adapted to be rotatable about a predetermined axis and scanning an object with the laser beam reflected by the light reflecting unit, a drive controlling unit controlling a deflection angle variation in a vertical direction of the light deflecting unit per unit time so that an interval between scanning lines in the vertical direction by the light deflecting unit is constant, and a driving unit rotationally driving the light deflecting unit in accordance with an rotational angle determined by the driving controlling unit.

Light scanning device and image forming device

An image display device includes: a screen having a fluorescent region including a fluorescent material; a light irradiation system, including: a first light source outputting excitation light exciting the fluorescent material; a second light source outputting visible light; a driving unit individually operating the first light source and the second light source corresponding to image information; and a scanning unit scanning with a light beam output from each of the first light source and the second light source in a main scanning direction and a sub-scanning direction intersecting with the main scanning direction on the screen; and an excitation light wavelength band reflector having a function to reflect light in a wavelength band of the excitation light toward the screen, and formed on an output side of a light beam from the light irradiation system with respect to the screen. The visible light output from the second light source develops a first color by diffusion by being projected on the screen, while the excitation light output from the first light source develops a second color by fluorescence by being projected in the fluorescent region, the second color being different from the color developed by the visible light so as to display an image corresponding to the image information on the screen.

Growing community of inventors

Matsumoto, Japan

Norio Nakamura