Omron Corporation

Junichi Takagi

Yasunobu Sakai

Masayuki Shinohara

Shigeru Aoyama

Tetuya Uno

Yasuhiro Tanoue

Takeshi Ishida

Hiroshi Fukui

Kouhei Tomita

Junichiro Tsuji

Tetsuya Uno

Yoshihiro Takamatsu

The light emitted from a spot light source () is emitted at a linearly extending region by a wedge-like light conductor () and deflected by a prism sheet (). This light is emitted in a direction perpendicular to a light incident surface () of the light conductor plate () and has a directivity narrow in a widthwise direction of the light conductor plate (). The light conductor plate () is formed, at its bottom surface, with a multiplicity of diffusion patterns () in a rectangular triangular form. The light reflected upon the diffusion pattern () is emitted perpendicularly to a light emitting surface () of the light conductor plate (). At this time, part of the light incident on the diffusion pattern () transmits through the diffusion pattern () whereby the directivity of emission light is narrowed in a lengthwise direction of the light conductor plate.

Surface light source, method for manufacturing the same and apparatus using it

To make an efficiency of utilizing light with high efficiency in a plane light source apparatus used along with a liquid crystal display panel of a reflection type as a backlight, light fleaked from a rear face of a light guide platein a skewed direction, is incident on inside of a prism sheetand reflected by a reflecting faceLight freflected by the reflecting faceis reflected in a direction orthogonal to the prism sheetpasses the light guide plateand is emitted from a light emitting faceof the light guide platein a direction orthogonally thereto.

Plane light source apparatus

The light emitted from a spot light source () is emitted at a linearly extending region by a wedge-like light conductor () and deflected by a prism sheet (). This light is emitted in a direction perpendicular to a light incident surface () of the light conductor plate () and has a directivity narrow in a widthwise direction of the light conductor plate (). The light conductor plate () is formed, at its bottom surface, with a multiplicity of diffusion patterns () in a rectangular triangular form. The light reflected upon the diffusion pattern () is emitted perpendicularly to alight emitting surface () of the light conductor plate (). At this time, part of the light incident on the diffusion pattern () transmits through the diffusion pattern () whereby the directivity of emission light is narrowed in a lengthwise direction of the light conductor plate.

A device for measuring the speed of an object. The device includes a spatial filter scheme to provide quick-response photodetectors and an efficient use of light. The device projects light onto the object by a light source 1, and the light reflected by the object is received by a lens. This light passes through aperture stop 4 and strikes prism array 7, where it is split alternately into two paths at a fixed pitch with respect to the optical axis. The two split beams are received respectively by two photodetectors. The speed of the object moving relative to the measuring device can be calculated based on the data collected by photodetectors.

Optical device for measuring speed

A raindrop sensor of the present invention including light emitting part which emits a strip-shaped light; light receiving part which receives the strip-shaped light emitted from the light emitting means; and detecting device which detects a raindrop based on the amount of the light received by the light receiving device. The raindrop sensor of the present invention is applied to a wiper apparatus of a vehicle. The wiper apparatus includes a wiper for wiping a windshield of the vehicle, and a control unit for instructing a given wiper operation to the wiper in accordance with a given output signals from the raindrop sensor, the wiper being driven in accordance with the instruction from the control unit. Also, the wiper apparatus using the raindrop sensor is applied to a vehicle.

Sensor for detecting raindrops, wiper drive apparatus using the device,

Road surface discriminator and apparatus applying same

An optical device is fitted into a casing (2) in a state in which a pair of lenses (6, 8) have the same optic axis (Ra). The casing (2) includes two identically shaped casing halves (1A, 1B), with the pair of lenses (6, 8) being embraced and held by the two casing halves in a state in which a gap (S) is left between the surfaces of the two casing halves.

Growing community of inventors

Kyoto, Japan

Junichi Takagi