Oki Electric Industry Co., Ltd.

Mio Chiba

Yukio Nakamura

Hiroshi Furuya

Takatoku Shimizu

Ichimatsu Abiko

Kazuo Tokura

Atsushi Takahashi

Masumi Taninaka

Hiromi Takahashi

Yoshitaka Terao

Katsuzo Kaminishi

Shintaro Kotani

Hideo Sawai

Takashi Ishizaki

Hiromasa Kanno

Hiroshi Tohyama

Takeyuki Yanagibashi

Tomoo Araki

Yuuji Terouchi

Kengo Ohtaka

Mituhiko Ogihara

Yasuo Iguti

Takashi Arae

Masao Ikehata

According to a first aspect of the invention, a light-emitting and light-sensing diode has a doped region with a depth not exceeding 2 .mu.m, for adequate sensitivity, and an impurity concentration of at least 5.times.10.sup.20 atoms/cm.sup.-3, for adequate emission. According to a second aspect of the invention, a light-emitting and light-sensing diode has a doped region with a deep part and a shallow part, and the area of the shallow part is increased to enhance the sensitivity of the diode. This may be done by providing the doped region with a meandering edge, or with one or more interior islands, or by forming the deep and shallow parts separately.

Light-emitting and light-sensing diode array device, and light-emitting

An array of light-emitting elements is switched on and off to produce a graded-intensity image on a photosensitive medium. Each light-emitting element is controlled by M-bit data representing the intensity of one image pixel, where M is a fixed integer greater than one. M strobe signals are generated for non-overlapping time intervals of different lengths, to strobe the M data bits for each light-emitting element. When strobed, each data bit switches its corresponding light-emitting element on or off. Image intensity depends on the total amount of time for which each light-emitting element is switched on.

Method and apparatus for controlling array of light-emitting elements

A method is for driving a gas discharge type light emission apparatus having an electrode block line(s) constituted by electrode blocks. Scanning of adjacent cathodes, one being in one of two adjacent electrode blocks and the other being in the other electrode block, is effected such that subsequent to the scanning of one adjacent cathode, at least one cathode other than the other adjacent cathode is scanned prior to the scanning of the other adjacent cathode. By the method, crosstalk between adjacent electrode blocks is prevented without the provision of a partitioning member between the adjacent electrode blocks. A gas discharge type light emission apparatus includes an anode(s) on a front substrate and cathodes on a rear substrate. The anodes and cathodes face one another via a discharge gas medium to constitute discharge cells. The anodes are made of a light-blocking material and including windows at positions corresponding to the cathodes. The windows are also provided at positions corresponding to boundaries between adjacent anodes. By providing windows, discharge light emission having a clear shape and a high resolution can be obtained.

Gas discharge type light emission apparatus and method of driving the

Disclosed is an erasable display apparatus including a heat-sensitive medium 1 having a hysteresis effect relative to temperature change. This display apparatus comprises an endless broad-width heat-sensitive display medium 1, driving means 2 for rotating and transferring the heat-sensitive display medium 1, a first heating member 3 for thermally recording information to be displayed on the heat sensitive display medium 1, a plane transparent panel heater 4 disposed on the back of the display surface contiguously to the heat-sensitive display medium 1, lighting means 5 disposed on the back of the transparent heat-insulating member 4 to illuminate the display surface, a color filter 6 disposed in front of the display surface and cooling means 7 for erasing the information recorded on the heat-sensitive display medium 1 after display. By this display apparatus, a display can be accomplished at a high density and the displayed picture quality can be enhanced. This display apparatus can be used repeatedly at a high frequency.

Display apparatus utilizing a thermally color reversible display medium

Growing community of inventors

Tokyo, Japan

Mio Chiba