Kabushiki Kaisha Toshiba

Ritsuo Yoshida

Kiyoyuki Kawai

Kazuyoshi Fuse

Masanobu Kimura

Masahiro Yamada

Hideaki Okano

Himio Yamauchi

Michihiro Fukushima

Ken Itou

Masatoshi Sano

Toru Sugiyama

Naoki Akamatsu

Keiji Hamoda

Ken Itoh

Hisakatsu Ito

Toshihiko Iijima

Chiemi Yamamoto

Akihiko Kubo

Ku Sato

In one embodiment, a stereoscopic video display apparatus includes: a plane display unit including a display screen in which first to third subpixels having respectively different color components are arranged in a matrix form; and an optical plate disposed to be opposed to the plane display unit and having a plurality of optical aperture parts. The plane display unit includes a configuration obtained by arranging the first subpixels on a first subpixel row, arranging the third subpixels on a second subpixel row adjacent to the first subpixel row, arranging the second subpixels on a third subpixel row adjacent to the second subpixel row, arranging the third subpixels on a fourth subpixel row adjacent to the third subpixel row, and arranging a set of the first to fourth subpixel rows in the column direction of subpixels on the display screen repeatedly.

Stereoscopic video display apparatus and display method

In one embodiment, a stereoscopic video display apparatus includes: a plane display unit including a display screen in which first to third subpixels having respectively different color components are arranged in a matrix form; and an optical plate. The plane display unit includes a configuration obtained by arranging a first subpixels and the second subpixels alternately on a first subpixel row, arranging the third subpixels on a second subpixel row adjacent to the first subpixel row, arranging the first subpixels and the second subpixels alternately on a third subpixel row adjacent to the second subpixel row to have a sequence opposite to that on the first subpixel row, arranging the third subpixels on a fourth subpixel row adjacent to the third subpixel row, and arranging a set of the first to fourth subpixel rows in the column direction of subpixels on the display screen repeatedly.

According to one embodiments a video signal control apparatus includes an average luminance detector and a display luminance controller. The average luminance detector detects the average luminance of a video signal with respect to each frame. The display luminance controller controls the display luminance of a first frame using the average luminance of a second frame prior to the first frame. When luminance change from the average luminance of the first frame to that of the second frame exceeds a predetermined threshold, the display luminance controller replaces the average luminance of the second frame with that of the first frame to control the display luminance of the first frame based on the average luminance of the first frame.

Video signal control apparatus and video signal control method

A backlight controller for controlling a backlight unit having a plurality of light sources arranged in a grid layout for illuminating a liquid crystal panel, the backlight controller including: a first calculator configured to calculate an average value and a standard deviation of control values for controlling the light sources, the control values being obtained from a feature quantity of an input image; a second calculator configured to calculate a ratio of the standard deviation to the average value; and a gain controller configured to control a gain to be applied to the control values based on the ratio calculated by the second calculator.

Backlight controller and liquid crystal display device

According to one embodiment, a video signal processing apparatus includes an acquisition unit to obtain the frequency of each luminance level from the input luminance signal worth of one frame, a frequency conversion unit that logarithmically converts the frequency of each luminance level obtained and adds a preset offset value, a preparation unit that prepares a nonlinear correction processing table to cumulatively add the frequency-converted data and provide nonlinear correction processing for the input luminance signal, and a processor that provides nonlinear correction processing to the input luminance signal in accordance with the prepared nonlinear correction processing table.

Video signal processing apparatus and video signal processing method

An up-conversion laser unit in which a semiconductor laser of high output power can be used as a pump light source and the wavelength of up-converted laser light is suitable for display. The light of infrared wavelength is generated by the pump light source, the generated light being inputted into a Pr up-conversion laser to up-convert there into red light by Pr ion. The up-converted red light is inputted into, as a pump light source, a Tm up-conversion laser, there being up-converted into blue light by the Tm ion. Thereby, efficient up-conversion into blue light is made possible.

Up-conversion laser

Even if there is a temperature variation, a positional discrepancy at a colliding surface of an active surface of a semiconductor laser and an optical waveguide is suppressed, resulting in realization of a semiconductor light emitting element coupled with optical fiber of stable operation. In order to realize the above object, a semiconductor light emitting element coupled with optical fiber comprises a substrate, an optical waveguide disposed on the substrate and including a core and a cladding layer covering the core, a semiconductor light emitting element disposed on the substrate and comprising an output end-surface facing one end of the core of the optical waveguide, and an optical fiber comprising a core an end of which faces the other end of the core of the optical waveguide, wherein the cladding layer sandwiches both surfaces of the semiconductor light emitting element.

Semiconductor light emitting element coupled with optical fiber

To obtain an inexpensive, high-power optical fiber output semiconductor device, an edge emitting type semiconductor element, a tapered optical waveguide having a structure for accommodating expansion and contraction due to a change in temperature, and an optical fiber are prepared separately. One edge of the tapered optical waveguide is butt-joined to an output face of the edge emitting type semiconductor element. The other edge of the tapered optical waveguide is connected to the optical fiber.

Optical fiber output semiconductor device

In an up-conversion laser using Tm, blue light having a wavelength of 450 nm and blue light having a wavelength of 480 nm are outputted simultaneously. A high output is enabled with a high efficiency, and a green up-conversion laser is also realized by a similar means. A hybrid fiber laser apparatus includes a light source which outputs light near a wavelength A, and comprises a means for reflecting light near the wavelength A, which is provided at another end of the optical fiber, thereby to form an optical resonator for the wavelength A. In this hybrid fiber laser apparatus, an up-conversion fiber is provided in the optical resonator for the wavelength A, and optical resonator structures for a wavelength B constructed by reflection means and for a wavelength B are respectively provided at two positions at both ends of the up-conversion fiber. Of the two reflection means, the reflection means in the laser diode chip side is arranged so as to achieve high reflection, and the other reflection means in the other end side is arranged so as to achieve partial reflection, thereby to obtain output light having a wavelength B from the partial reflection side.

Upconversion fiber laser apparatus

A three-dimensional image display apparatus of the invention can be easily operated by the operator while a three-dimensional image created by the apparatus is observed by him. A depth information maximum value acquisition circuit acquires depth information contained in a first image signal. A parallax control circuit controls the parallax amount of a second image signal on the basis of depth information contained in the first and second image signals such that an image corresponding to the second image signal can be three-dimensionally displayed in front of an image corresponding to the first image signal. A three-dimensional image synthesizer synthesizes the first and second image signals which has been controlled by the parallax control circuit, on the basis of the parallax amount of each image signal, such that images correspond to that the first and second image signals in the three-dimensional display space.

Three-dimensional image display apparatus

A cassette convey means can carry a plurality of cassettes, and can selectively convey and mount a cassette to a cassette driving section, or can externally feed the mounted cassette. A cassette selection/setting means outputs designation data for selecting and designating one of the cassettes. An operation mode input means outputs an operation signal including cassette subsidiary information such as a timer setting instruction or remaining amount display data for the cassette designated by the cassette selection setting means, or a tape driving instruction. A cassette information storage means stores information of each of the plurality of cassettes. A system controller checks conditions of pieces of input information from the above-mentioned means, selects an optimal cassette according to a purpose, and controls the cassette convey means to mount the selected cassette on the tape driving section. A cassette exchange mode selection means can switch an exchange mode between a mode of performing automatic cassette selection, and a mode of performing cassette selection upon an operation by a user in a cassette exchange mode.

Growing community of inventors

Zushi, Japan

Ritsuo Yoshida