Idec Izumi Corporation

Koji Inada

Toshihiro Fujita

Shoji Fujii

Akito Okamoto

Rina Matsuda

Ikkan Nishihara

Takeshi Takao

Tatsumi Tamon

Koichi Motomura

When pressing a pushbutton ( ) in this thin switch ( ), the pushbutton ( ) rotates at a constant stroke until a lower end of this pushbutton ( ) on the side of a permanent magnet ( ) comes into contact with a lower display panel ( ). Following this rotation, positional relation between the permanent magnet ( ) and a Hall element integrated circuit ( ) corresponding to this pushbutton ( ) changes and the Hall element integrated circuit ( ) detects change of a magnetic field by the permanent magnet ( ), whereby the pressing operation of the pushbutton ( ) is detected. When the pushing operation is canceled, the pushbutton ( ) is returned to the original state due to attractive force of the permanent magnet ( ) and a magnetic body ( ).

Thin switch and display panel provided with switch

In a plastic identifying apparatus ( ), a reference light (L ) and a detecting light (L ), each having a predetermined wavelength, are irradiated to an object to be identified ( ), and the transmitted lights of the reference light (L ) and detecting light (L ) are received. A detecting value expressing the quantity of light received of the detecting light (L ) is divided by a reference value expressing the quantity of light received of the reference light (L ), to obtain a computed value, based on which performed is identification of plastic forming the object to be identified . The wavelength of the reference light (L ) is in a wavelength band (hereat, 1550 nm) in which the light absorptances of all the types of plastics are of the lowest level, and the wavelength of the detecting light (L ) is in a wavelength region (hereat, in the range of 1700 to 1760 run) in which the absorption wavelength bands of many plastics except for PET, such as HDPE, are present.

Apparatus and method for judging plastic

Growing community of inventors

Osaka, Japan

Koji Inada