Sharp Kabushiki Kaisha Corporation

Masanori Shimo

Masaki Yamamoto

Hideharu Tajima

Michinobu Mieda

Go Mori

Nobuyuki Takamori

Toshihiko Sakai

Junji Hirokane

Hirohisa Yamada

Yasuhiro Harada

Ikuo Nakano

Takafumi Hara

Saori Nambo

Eriko Wakabayashi

Yoshinori Matsui

In an optical information recording medium (), a light-transmitting layer () or a transparent substrate, an information recording layer (), and a substrate () are stacked in this order from a side from which reproducing light () enters. The information recording layer () includes at least a reproducing film () whose complex refractive index at a light source wavelength (&#x3bb;) of the reproducing light () is changed by heat. The relationship of 0.67&#xd7;(&#x3bb;/NA)&#x3e;TP&#x3e;0.04&#xd7;(&#x3bb;/NA) is satisfied, where TP is a track pitch of prepits () formed on the substrate (), and NA is a numerical aperture of an objective lens () for converging the reproducing light () on the optical information recording medium.

Optical information recording medium, reproducing device for optical information recording medium, and reproducing method for optical information recording medium

In a liquid crystal display deviceprovided by the present invention, at least a part of a circuit boardcan be held on an outer side surfaceB of a frameby a board clipmounted on the outer side surfaceB of the frame. The board clipincludes a plate-like main body portionlocated so as to face the outer side surfaceB of the frame, front-side engaging portionsand, and a pair of rear-side engaging portionsand. A bezel receiving portioncontactable with a part of a peripheral portion of a bezelis formed in the vicinity of the front-side engaging portionsand

Liquid crystal display device and board clip mountable on the liquid crystal display device

There is provided a storage layer () between storage layers (), (). The storage layer () produces a relatively large spherical aberration for a protection layer thickness error. Information is written to or read from the storage layer () with a beam of light having a second wavelength. Information is written to or read from the storage layers (), () with a beam of light having a first wavelength (longer than the second wavelength). Accordingly, a multi-format optical storage medium is realized on which information can be recorded or reproduced with a single objective lens. Also, an optical pickup is realized which is capable of recording or reproducing information on the multi-format optical storage medium.

Multi-format optical storage medium, optical pickup, and optical read/write device

An optical disk includes a plurality of disk sheets which are laminated, and each of which has a recording face on one of the surfaces and a flat back surface, wherein the plurality of disk sheets are laminated by adhesive layers in such a manner that between adjacent two disk sheets, a back surface of one of the disk sheets, on the opposite side of the surface where the recording face is formed, faces the disk surface of the other disk sheet. The foregoing structure realizes an optical disk of desirable recording/reproducing characteristics, which is flat and has a fixed interval between recording faces, and which permits the problems of coma aberration, spherical aberration, etc., to be suppressed.

Optical disk and optical disk recording and reproducing device

A lens-cleaning disc capable of efficiently removing dirt or dust on pickup lenses, equipped with a brush body comprising bristles fastened into the brush base, at a position facing the pickup lens when the disc is used, wherein the surface of the brush base may be constructed as an adhesive surface or the brush body may be placed at an angle with respect to a radial direction of the disc so that its inner end is located further forward than its outer end in the direction of rotation at all times during rotation of the disc.

Lens-cleaning disc with angled brush with adhesive

Growing community of inventors

Gose, Japan

Masanori Shimo