Hitachi, Ltd.

Hitachi Consumer Electronics Co., Ltd.

Hitachi Maxell, Limited

Renesas Technology Corp.

Toppan Printing Co., Ltd.

Maxell, Ltd.

Hidehiro Ikeda

Koji Hirata

Masahiko Yatsu

Naoyuki Ogura

Satoshi Ouchi

Tomoki Kobori

Shuji Kato

Mikio Shiraishi

Nobuyuki Kaku

Nobuyuki Kimura

Yasuo Otsuka

Kenji Fuse

Kazuo Shikita

Kouki Hayashi

Yoshikazu Nagamura

Kouji Tange

Masahiro Yamamoto

Seiji Murata

Junichi Ikoma

Hiroyuki Minemura

Yoshiho Seo

Tetsuya Nishida

Yumiko Anzai

Takanori Hisada

Naoyuki Kofuji

Jiro Yamamoto

Tadashi Sato

Kazunari Nakagawa

Daisuke Imafuku

Masayuki Fukui

Tsutomu Nakashima

Tatsuya Ishikawa

Kei Adachi

Toshihiko Matsuzawa

Junichi Yokoyama

Yuriko Inadachi

In order to improve a characteristic of an optical element, an optical element (polarizing filter) including a substrateS having a wire-grid regionA and a peripheral regionA positioned on an outer periphery thereof is made to have the following configuration. A wire-grid in which a plurality of line-shaped wires Pmade of Al and extending in a y direction are arranged at spaces S in an x direction is provided in the wire-grid regionA of the substrateS, and a pattern (repetitive pattern) in which a plurality of protruding portions Pmade of Al are arranged is provided in the peripheral regionA. This pattern is, for example, a checkerboard pattern. According to the above-mentioned configuration, the plurality of wires Pcan be arranged so that their respective ends are spaced apart from an end of the substrateS, so that the wires Pcan be prevented from being deformed and nicked. Also, by the plurality of protruding portions Pin the peripheral regionA, it is possible to prevent water from entering the wire-grid regionA.

Optical element, manufacturing method of optical element, and optical device

Provided are an optical element and an optical device using the optical element to which a manufacturing process for manufacturing a wire-grid structure can be basically applied, and besides, in which a higher polarization contrast ratio than that of a wire-grid element can be obtained. A wobbled wire element in an embodiment has a feature that a periodic structure having a period equal to or larger than a wavelength of an incident light wave is formed in a y direction. In this manner, in a wobbled wire element in a first embodiment, a polarization contrast ratio can be significantly improved.

Optical element and optical device

A solid-state light source device, enabling to build up with using solid-state elements, and having the structure suitable to be applied as a light source for a projection-type display apparatus, comprises a solid-state light source unitfor emitting excitation light therefrom, a reflection mirror (or reflector)made of a parabolic surface, for condensing the excitation light from the solid-state light source to be point-like, and a disc-like (or wheel) member, repeating reflection/scattering or transmission/scattering of the excitation light and conversion of the excitation light, alternately, in vicinity of a focus point of the excitation light, which is condensed to be point-like by the reflection mirror (or reflector), wherein the excitation light (B-color) reflected/or scattered by that disc-like (or wheel) member and fluorescence light (Y-color), wavelength of which is converted, is taken on a same optical path, by means of the reflection mirror (or reflector)or a second reflection mirror (or reflector)', and thereby outputting a white color light emitting from a point-like light source.

Solid-state light source device

A light source apparatus which emits light from phosphor by exciting light and in which an efficiency of brightness is improved is provided. The light source apparatus has a light source which emits exciting light; and a metal member to which the exciting light is input, wherein the metal member has a concave portion in a portion to which the exciting light is input, and phosphor to generate phosphor light from the exciting light is coated in the concave portion. The concave portion may have a taper shape. The phosphor may be coated on at least two surfaces of the concave portion. The phosphor may be coated on an area which is equal to or less than the half of a depth of the concave portion. A glass member having a taper shape may be formed at an opening portion of the concave portion.

Light source apparatus used in a projection type image display apparatus

A laser projector includes a laser light source to emit laser light modulated in accordance with image information, a scanner to drive the laser light along two axes in horizontal and vertical directions and make scanning two-dimensionally with the laser light, a scanning mirror drive part to produce a drive signal of the scanner, a light source data conversion part to change arrangement in a horizontal direction of data applied to the laser light source and a timing generation part to synchronize the scanning mirror drive part with the light source data conversion part, and a start direction of laser scanning in the horizontal direction is changed every frame of the image information.

Laser projector

There is provided a projection apparatus using an oblique projection optical system, which generates little reflection loss by providing a linear Fresnel lens at an incident surface in the case where the apparatus is used as a linear system, wherein said linear Fresnel lens makes total reflection of image light, and is capable of obtaining total surface property with good brightness in a region with small incident angle onto a screen, by using a total reflection Fresnel lens and a refraction Fresnel lens in combination. In addition, total surface property with further good brightness can be obtained by using a plurality of projection image display apparatuses in the same projection apparatus.

Projection apparatus and transparent screen for it

Two pieces of elliptic semi-sphere surfaces, each forming a pinhole at the zenith thereof and also forming a reflection mirror on an inside thereof are stuck onto each other, with facing the interior surfaces thereof, respectively. A light ray entering therein from one of the pinholes, after being reflected between the elliptic semi-sphere surfaces facing to each other, emits from the pinhole on opposite side at an angle plane symmetric to the incident angle. Disposing the elliptic semi-sphere surfaces facing to each other, aligning on a plane, by plural numbers thereof, there is built up a pinhole array. Plural numbers of light rays reflecting on and/or emitting from a display object, which is disposed on one side of the pinhole array, after passing through the plural numbers of pinholes of the pinhole array, form an image at a position plane symmetric thereto, on the opposite side of the pinhole array.

Pinhole array and display device using same

A display apparatus includes a light source which is configured to emit a light, a first light modulation unit which is configured modulate the light emitted from said light source, a first drive unit which is configured to drive said first light modulation unit, a projection unit, which is configured to project the light from said first light modulation unit enlargedly, a second light modulation unit, which is configured to modulate the light emitted from said projection unit so as to be emitted to an observer side, a second drive unit which is configured to drive said second light modulation unit, and an optical direction conversion unit, which is configured to convert the light from said projection unit so that the light is incident upon an incident surface of said second light modulation unit in a direction approximately perpendicular thereto.

Display apparatus and projection type lighting apparatus therefor

There is provided a projection image display apparatus which is excellent in quality of a display screen image even if a projection lens using a plastic lens having an asymmetrical shape with respect to an optical axis is used. The apparatus includes a projection lens which obliquely projects video light on a screen, an integrator which aligns a polarization direction of light from a light source, and an image display element (P, PL) which modulates light having the aligned polarization direction by an image signal. The projection lens includes multiple plastic lenses, and each of the multiple plastic lenses is arrayed, respectively, by shifting a gate direction to each other by 180 degrees. When the projection lens includes n sheets (n is a natural number) of plastic lenses, each of the multiple plastic lenses may be arrayed, respectively, by shifting a gate direction to each other by (360/n) degrees.

Projection image display apparatus having a first lens and a second lens adjacent to the screen

A display apparatus is provided which, when projecting a video onto a curved surface of an object for display, can realize an undistorted display of the video. The measuring means outputs the distance information representing the distance to the object. Based on the distance information produced by the measuring means, the curved surface contour is detected with high precision. According to at least the detected curved surface contour distortions, pixels of the display image are unevenly rearranged to correct the video information before it is output. This arrangement realizes an undistorted display of video when the video is projected onto the curved surface of the object.

Display apparatus

A projection-type display apparatus, being suitable to be applied as a light source of a solid-state light source, in the place of a conventional lamp, comprises: a light source unit, which is configured to emit a white-color light therefrom; a light separation optic system, which is configured to separate the white color light from the light source unit into three primary color lights, red-color (R), green-color (G) and blue-color (B); R, G and B light modulating portions, each of which modulates each of R, G and B polarized lights separated, depending on a video signal, respectively; a light composing unit, which is configured to compose optical images, which are formed by the R, G and B light modulating portions; and a projecting portion, which is configure to project the optical image composed, enlargedly, wherein the light source unit emits a white color light emitting from a nearly point-like light source, including an excitation light from a solid-state light emitting element therein.

Projection-type display apparatus

Projection apparatus with linear fresnel lens and transparent screen therefor

A projection-type display apparatus, being suitable to be applied as a light source of a solid-state light source, in the place of a conventional lamp, comprises: a light source unit, which is configured to emit a white-color light therefrom; a light separation optic system, which is configured to separate the white color light from the light source unit into three primary color lights, R (red-color), G (green-color) and B (blue-color); R, G and B light modulating portions, each of which modulates each of R, G and B polarized lights separated, depending on a video signal, respectively; a light composing unit, which is configured to compose optical images, which are formed by the R, G and B light modulating portions; and a projecting portion, which is configure to project the optical image composed, enlargedly, wherein the light source unit emits a white color light emitting from a nearly point-like light source, including an excitation light from a solid-state light emitting element therein.

An image displaying apparatus, comprising: a first light modulator unit, which is configured to modulate a light incident thereon, responding to a first video signal, thereby to form a first image; one or a plural number of second light modulator units, which is/are configured to modulate a light from a light source, responding to a second video signal; and an enlarged image forming unit, being disposed on a light incidence side of the first light modulator unit, upon which a light modulated within the second light modulator unit is projected, enlargedly, thereby to form a second image thereon, wherein upon the first light modulator unit is incident the light of the second image formed on the enlarged image forming unit, and the first image is formed through modulation of the light of the second image responding to the first video signal.

Imaging displaying apparatus and 3-D image displaying apparatus applying the same therein

Growing community of inventors

Yokohama, Japan

Hidehiro Ikeda