Alps Electric Co., Ltd.

Koichi Yamamoto

Hideaki Nagakubo

Takuro Sugiura

Kazutoshi Watanabe

Naoki Yamada

Katsuyuki Katayama

Keiji Takagi

Takenobu Kimura

Hideki Ueno

Naoya Akiyama

Shinichiro Kimura

Tomosuke Takata

Masahiro Ishida

Naomi Sato

Toshinobu Hosaka

An input device includes a plurality of manipulation portions; an input function portion manipulated by the manipulation portions to perform an input function; a light guiding sheet facing the rear side of the plurality of manipulation portions; and a light source applying light into the light guiding sheet, wherein a rear surface opposite to a front surface of the light guiding sheet facing the manipulation portions is provided with a plurality of concave portions which is depressed to the inside of the light guiding sheet, wherein each concave portion has a circular opening and an inner surface which is a smooth concave curve surface, and wherein light propagated through the inside of the light guiding sheet is reflected by the inner surface toward the inside of the light guiding sheet, and the light is applied from the front surface of the light guiding sheet to the manipulation portions.

Input device and keyboard device having illumination function

A light guiding plate comprises a pair of main surfaces opposite to each other, and an end surface on which light emitted from a light source is incident. One of the pair of main surfaces has a plurality of prisms. Each of the prisms has a first surface which is relatively close to the end surface and has a relatively gentle slope, a second surface which is relatively distant from the end surface and has a relatively steep slope, and a third surface located between the first surface and the second surface, and an angle between the second surface and the third surface is an acute angle.

Light guiding plate including a plurality of prisms, surface emitting device using light guiding plate, and liquid crystal display device using light guiding plate

In a surface emitting device in which a light source is bonded to a light guide bar in contact with a light guide plate, the light source is bonded to the light guide bar using an adjusting member for adjusting the position of the light source. Examples of the adjusting member include a spacer disposed under the light source, a recessed portion provided in a molded case, a positioning guide made by extending a reflective panel, and another positioning guide formed integrally with the light guide bar.

Surface emitting device and liquid crystal display apparatus

A backlight devicewherein a light sourceand a light guide platefor introducing light components from the light sourcefrom the incident surfaceprovided on an end surface to emit the light from the surfaceare included, a plurality of the wedge-shaped groovesare formed on the surfaceof the light guide platein stripes in plan view, and micro-irregularitiesare formed between adjacent wedge-shaped groovesis disclosed. A liquid crystal display devicehaving the backlight deviceformed on the back surface of the liquid crystal display unitis disclosed.

Backlight device and liquid crystal display device

A switching device includes a switch body, a side knob, a returning mechanism, and a stopper. The switch body has a controlling unit which can be tilted and depressed. The switch body is surface-mounted on the printed circuit board. The side knob is attached to the controlling unit of the switch body. The switch body includes the returning mechanism for the controlling unit. The stopper is actuated in accordance with the tilting or depression of the side knob. The stopper is surface-mounted on the printed circuit board.

Switching device including stopper surface-mounted on printed circuit board

Growing community of inventors

Fukushima-ken, Japan

Koichi Yamamoto