Alps Electric Co., Ltd.

Masami Ikarashi

Yoshinori Kato

Yoshimi Kamijo

Kenichi Mitsumori

Mitsuru Kano

Jun Nakanowatari

Yorihiko Sasaki

Hitoshi Seki

Masahiko Yamaguchi

Tomoo Kamigaki

Takemi Akimoto

Yasuhiro Miki

A electroluminescence device has a light emitting layer composed of a fluorescent powder and a liquid crystal between a transparent substrate formed with a transparent electrode and an insulating substrate formed with an opposed electrode.

Electroluminescent device having a liquid crystal layer adjacent to the

There is provided a drive circuit for an electro-luminescence (EL) display device comprising a variable frequency oscillator circuit whose output signal frequency is externally modifiable, a voltage booster circuit for boosting the output signal of said variable frequency oscillator circuit to a predetermined level and supplying it to an EL display device as drive voltage, an impedance matching circuit whose impedance is externally modifiable and which is connected to said display device, a timing means for timing the duration of application of drive voltage to said display device and a control means for switching the output signal frequency of said variable frequency oscillator circuit and the impedance of said impedance matching circuit in accordance with said duration of voltage application. It is apparent that a drive circuit having such an arrangement as described above can effectively correct any shift of color of the light emitted from the connected EL display device and maintain the origninal color of the EL display device. Moreover, such a drive circuit for an EL display device can effectively compensate the loss of brightness of the screen of the EL display device connected therewith and hence prolong the apparent life of the display device.

Drive circuit for an electroluminescence display device

A film-covered terminal comprises a foil-like or plate-like electrode terminal with its opposite surfaces covered with sealing films through bonding layers respectively, a rivet of a conductive plastic material inserted through the electrode terminal, the bonding layers, and the sealing films, and welded to the electrode terminal, the bonding layers, and the sealing films, and a soldering member secured to an end portion of the rivet. A method of manufacturing a film-covered terminal is also disclosed which comprises the steps of covering opposite surfaces of a foil-like and plate-like electrode terminal with sealing films through bonding layers respectively, inserting a rivet of an electrically conductive plastic material into a through hole formed through the electrode terminal, the bonding layers, and the sealing films, the rivet having an end portion at which a soldering member is secured, and thermally press-bonding the opposite ends of the rivet.

Film-covered terminal

A transparent electrode for use in a dispersive type electroluminescent device or the like comprises a transparent substrate, a transparent electrode film on the substrate, and a number of closely spaced protective ridges continuous with each other on the electrode film.

Transparent electrode with protective, conductive grid

Disclosed is a film-covered terminal which comprises a foil-like or plate-like electrode terminal with its opposite surfaces covered with sealing films through bonding layers respectively, a rivet of a conductive plastic material inserted through the electrode terminal, the bonding layers, and the sealing films, and welded to the electrode terminal, the bonding layers, and the sealing films, and a soldering member secured to an end portion of the rivet. A method of manufacturing a film-covered terminal is also disclosed which comprises the steps of covering opposite surfaces of a foil-like and plate-like electrode terminal through bonding layers respectively, inserting a rivet of an electrically conductive plastic material into a through hole formed through the electrode terminal, the bonding layers, and the sealing films, the rivet having an end portion at which a soldering member is secured, and thermally press-bonding the opposite ends of the rivet.

Growing community of inventors

Furukawa, Japan

Masami Ikarashi