Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Akihisa Miyata

Shinsuke Shikama

Shinji Okamori

Yuzo Nakano

Takeshi Utakoji

Hiroshi Suzuki

Kuniko Kojima

Kohei Teramoto

Taketoshi Hibi

Satoru Okagaki

Katsumi Asakawa

Jyunichi Aizawa

Takao Endo

Jun Kondo

Naoki Kawamoto

Kouhei Tamano

Shosuke Oka

Hiroaki Ishitani

Shigeharu Yoshikawa

A screen is provided with microcapsules and a base material. The microcapsules each contain encapsulated liquid inside a capsule membrane. The microcapsules are planarly arranged on the base material. The encapsulated liquid includes light diffusion particles for scattering light, and a dispersion medium for dispersing the light diffusion particles. In a cross sectional area of the microcapsule projected in the direction perpendicular to the surface of the base material on which the microcapsules are planarly arranged, the ratio of the area of the encapsulated region to the area of the microcapsule ranges from 0.9025 to 0.990.

Screen, optical element, and display device

A reflection surface () of a mirror () has a rotationally-symmetrical shape about an optical axis (). The mirror () is rotatably supported by a pivot supporting portion () on the position of the optical axis () of the reflection surface () or in the vicinity of the optical axis (). Furthermore, the mirror () is slidably supported by slide supporting portions () at two positions on the upper part thereof. With such a configuration, the mirror () is supported at three points. Further, even when the mirror () expands and contracts due to the change in temperature or the like, the deformation of the reflection surface () of the mirror () is prevented by the action of the slide supporting portions (). As a result, it is possible to prevent the generation of distortion of an image projected on a screen ().

Supporting mechanism of reflector and projection apparatus

A transparent screen and a projection display unit capable of reducing the speckle with maintaining the brightness of the image light. A wavefront-dividing phase-modulating componentwhich divides the wavefront of the image light emitted from a Fresnel lens screenand modulates the phases of the wavefronts divided, is disposed before an optical diffusing component. Alternatively, a spatial frequency modulating component, which modulates the spatial frequency of the image light diffused by the optical diffusing component, is disposed on the light-output side (observer side) of the optical diffusing component

Transparent screen and projection display unit

A transmission screen has a refraction total reflection Fresnel lens plate, a stray light eliminating plate, and an image display plate. The stray light eliminating plate has a condensing lens array and black stripes. The array has unit lenses arranged at an incident plane of the transparent substrate in a periodic structure in an up-and-down direction. The black stripes have transparent sections placed near condensing light points of the unit lens and opaque sections around the condensing light points of the unit lenses. The sections are alternately arranged at the outgoing plane of the transmission substrate in a periodic structure in an up-and-down direction. The image display plate has lenticular lenses in which unit lenses are arranged in a periodic structure in a horizontal direction at an incident plane of the transmission substrate of a scattering characteristic capable of scattering light fluxes.

Transmission screen and projection display

A projection television has a unit for reflecting OFF light not advancing toward a screen of light emitted by a reflection type light modulating element and a unit for controlling the amount of the reflecting OFF light and returns the OFF light which has not been used in a conventional device to the light source to reuse the OFF light. This configuration increases the utilization efficiency of the light and, as a result, can realize a powerful projection television having a bright projection image.

Light source device and projection television

A light-source device comprising: a rod integrator having an injection end and an emitting end; a lens unit for collecting a luminous flux emitted from the emitting end; and, a diaphragm. The rod integrator forms a plurality of imaginary light-source points, each of which virtually emits the luminous flux toward the emitting end. The diaphragm is disposed in the vicinity of a plane on which the lens unit forms the images of the imaginary light-source points, and selectively blocks luminous flux emitted from each of the images of the imaginary light-source points.

Light-source device and projection type display device

An illumination apparatus and a projection type display apparatus of lower cost are provided, in which extra-axial aberrations, especially distortion and lateral aberration, are favorably corrected, and the dimensional margin of illumination is suppressed to enhance the utilization factor of light. The illumination apparatus includes a first group of lenses which includes a meniscus lens having a positive refracting power, a second group of lenses which includes first lens means having a negative refracting power and second lens means having a positive refracting power, and lens means whose surface immediately before a surface to-be-illuminated is a plane surface, whereby an illuminating light beam is caused to exit in a telecentric state.

Illumination apparatus and projection type display apparatus

A UV-absorbing filter absorbs a UV component of incoming light to reduce an amount of the UV component of transmitted light. The UV-absorbing filter comprises a transparent UV-absorbing glass plate which contains a UV-absorbing substance; a transparent first and second heat-resistant glass plates which face respective surfaces of the UV-absorbing glass plate; a first and second distance pieces which are made of heat-resistant resin and which are respectively interposed between the UV-absorbing glass plate and the first and second heat-resistant glass plates, in the vicinity of an outer edge of the UV-absorbing glass plate, so as to form a space between them.

UV-absorbing filter and optical apparatus incorporating the same

A projection-type liquid crystal display apparatus that prevents deterioration of a projected image occurring attributable to lowering of the temperature of a liquid crystal panel, the difference in the temperature between the liquid crystal panels and temperature inclination in the liquid crystal panel. A projection-type liquid crystal display apparatus having a light source 1, liquid crystal panels 12, 13 and 14 for modulating a light beam emitted by the light source 1, a projection lens 21 for projecting the modulated light beam onto a screen 28, temperature detectors 25, 26 and 27 for detecting the temperatures of portions adjacent to the liquid crystal panels 12, 13 and 14, heater elements 18, 19 and 20 disposed adjacent to image forming surfaces of the liquid crystal panels 12, 13 and 14 and on a light path of a light beam emitted from the light source 1, a drive circuit 40 for operating the heater elements 18, 19 and 20 and a control unit 35 for controlling the heat generating performance of the heater elements 18, 19 and 20 in accordance with values detected by the temperature detectors 25, 26 and 27.

Growing community of inventors

Tokyo, Japan

Akihisa Miyata