Seiko Epson Corporation

Hideya Seki

Eiji Morikuni

Masatoshi Yonekubo

Takashi Takeda

Akira Shinbo

Kaoru Yamaguchi

Toshio Arimura

Junichi Nakamura

Shinji Haba

Satoshi Kinoshita

Hiroyuki Ishikawa

Hirokazu Ito

Kouichi Ebina

An image display apparatus includes: a light source emitting light; a spatial light modulator having a display region, and modulating the light emitted from the light source in accordance with an image signal; a projection device projecting the light modulated by the spatial light modulator onto a projection surface including an illumination region; and a deflecting section deflecting the light that is emitted from the light source and is then incident on the spatial light modulator. In this structure, the light emitted from the light source illuminates a part of the display region of the spatial light modulator, the light is deflected by the deflecting section, and the illumination region illuminated by the light moves on the projection surface.

Image display apparatus

There is provided a screen and a projector using a simple configuration and operation to make speckles less visible. A screenon which light beams are incident includes a lenticular lensas a first layer having viewing angle control means for enlarging the viewing angle and a Fresnel lensas a second layer having angular conversion means for converting the angles of incidence of the incident light beams into the substantially same direction. One of the first and second layers has a diffusion capability that diffuses the incident light beams and has moving means for moving that layer relative to the other. Alternatively, the first and second layers both have the diffusion capability, and at least one of the layers has moving means for moving that layer relative to the other.

Screen and projector

A screen includes a screen main body that has a diffusion layer, a frame that is provided along the circumference of the screen main body, and to which the diffusion layer is attached through supporting members to rock, and a driving unit that is mounted on the diffusion layer and moves the diffusion layer in parallel to a surface of the diffusion layer.

Screen, rear projector, and image display device that are capable of effectively reducing scintillation

An evaluation method for evaluating optical characteristics of an optical system, the evaluation method includes: providing an optical system that is an evaluation object and that has a light incidence section and a light emission section; disposing a first pattern having a fist predetermined pitch, in an optical path of light which is incident onto the light incidence section; disposing a projection surface having a second pattern with a second predetermined pitch, at the position to which the light emitted from the light emission section is reached; projecting an image of the first pattern onto the projection surface through the optical system; and evaluating the optical characteristics of the optical system by observing a state of moir&#xe9; fringes which are generated onto the projection surface due to interference between the image and the second pattern.

Evaluation method for evaluating optical characteristics of optical system, evaluation method for evaluating projector, evaluation device for evaluating optical characteristics, and screen

Screen, rear projector, and image display device having a plurality of driving units each with a power source that are capable of effectively reducing scintillation

A screen that receives projected light beams to display an image includes: a plurality of light-transmissive plates having optical transparency; a fluid that is disposed within a light scattering space formed between the light-transmissive plates and contains at least one of gas and liquid; and scattering components that are disposed within the light scattering space and are deformable according to an atmosphere change of the fluid.

Screen, rear projector and image display apparatus with deformable scattering components

A screen that displays images as a result of receiving projection light, includes: a plurality of plate components that are optically transparent and are provided apart from each other; a scatterer that is placed in a light scattering space that is formed between the plurality of plate components, and is formed by dispersing a light scattering material in a gas or liquid dispersion medium; a flow path that allows the scatterer to flow through the light scattering space; and a flow device that causes the scatterer to flow through the light scattering space.

Screen, rear projector, projection system, and image display unit

To provide a projector or the like, which use a solid-state light-emitting element as light source and which provides a bright, stable, and uniform projection image, the present invention includes: a light source to emit light; a spatial light modulator to modulate the light from the light source in accordance with an image signal; and a projector lens to project the light modulated by the spatial light modulator. The spatial light modulator is a tilt mirror device including a movable mirror element that reflects the light from the light source in the direction of the projector lens or in the direction other than that of the projector lens. The invention may further include a light-intensity measuring section provided in an imaging position of the light source or in the vicinity of the imaging position to measure the light intensity of the light reflected in the direction other than that of the projector lens; and a light-source controller to control the light source in accordance with the signal from the light-intensity measuring section.

Projector and optical device

A projector includes a laser beam source that outputs a laser beam and modulates the laser beam in a beam form based on an image signal, a scanning unit that scans the laser beam output by the laser beam source at least in one-dimensional direction, a scan driving unit that drive controls the scanning unit by a first force, a retaining unit that stops and retains the scanning unit at a predetermined position by a second force, and a light shielding unit that shields the laser beam from the scanning unit that is retained by the retaining unit. The scan driving unit releases the scanning unit retained by the retaining unit, and drives it when the first force is larger than the second force. The retaining unit stops and retains the scanning unit at the predetermined position when the second force is larger than the first force.

Projector

A light source that has a small size can provide uniform light at high efficiency and can have a high degree of freedom in design, a method for manufacturing this light source, and a projector having this light source include a solid-state light-emitting chip that supplies G-light, which is light of a predetermined wavelength range, a support, a package mold, and a heat sink that constitute a solid-state light-emitting chip supporting part for supporting the solid-state light-emitting chip, an optical guide that reflects the G-light and thus causes the G-light to exit into an illuminating direction, and a support, which is an optical guide supporting part for supporting the optical guide. A light exiting surface of the solid-state light-emitting chip and a light incident surface of the optical guide are provided at a predetermined spacing. The solid-state light-emitting chip is, for example, an InGaN-based LED flip chip.

Light source, method for manufacturing light source, and projector

To provide a projector capable of obtaining a bright projection image with good color balance by efficient cooling in the case of using light source parts having different wavelength characteristics, a projector has plural light source parts to supply illumination lights, a cooling part to cool light source parts, spatial light modulators to modulate the illumination lights from the light source parts according to image signals, and a projection lens to project the lights modulated by the spatial light modulators, and the light source parts provide different amounts of illumination lights that change depending on the temperature changes of the light source parts. The cooling part cools the light source parts so that they provide amounts of light within a predetermined range with the amount of illumination light provided when one of the light source parts are at a reference temperature.

The present invention relates to a small optical writing head, such as an organic EL array exposure head, having long work distance with little crosstalk, a method of manufacturing the same, and an image forming apparatus using the same. The optical writing head is an optical writing head which projects fluxes of modulated light from light-emitting partsof a light-emitting element array such as an organic EL array or fluxes of modulated light transmitted through shutter partsof an optical shutter element array onto an image carrierto form a predetermined pattern on the image carrier. The optical writing head comprises ball lenseswhich are arranged such that the alignment of the ball lensescorresponds to the alignment of the light-emitting partsof the light-emitting element array or the shutter partsof the optical shutter element array.

Optical writing head such as organic EL array exposure head, method of manufacturing the same, and image forming apparatus using the same

Exemplary embodiments provide a light source unit capable of reducing emission of any unnecessary electromagnetic waves to a sufficient level, and a projector using such a light source unit. Exemplary embodiments include a chip that emits light responding to an incoming current, a base section structured by stacking the chip, electrode terminals to supply the current to the chip, and a cap section made from an optically transparent member to seal both the chip, and the electrode terminals, and a bonding wire. The base section and the cap section are both made from a conductive member, and the chip, the bonding wire, and the electrode terminals are electromagnetically enclosed through sealing by the base section and the cap section.

Growing community of inventors

Okaya, Japan

Hideya Seki