Nippon Soken, Inc.

Nippondenso Co., Ltd.

Toyota Jidosha Kogyo Kabushiki Kaisha

Denso Corporation

Research Development Corporation of Japan

Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Nippon Steel Corporation

Nippondenso Corporation

Tadashi Hattori

Hiroaki Yamaguchi

Nobuei Ito

Minoru Nishida

Takamichi Nakase

Yoshinori Ootsuka

Yoshiki Ueno

Kazuhiko Miura

Kazuhiro Inoguchi

Masayuki Katayama

Minoru Ohta

Toshiharu Iwata

Yutaka Hattori

Seizi Huzino

Daisaku Sawada

Kenji Goto

Akira Takata

Tamotsu Fukuda

Kenji Kanehara

Tadashi Ozaki

Susumu Sato

Hajime Ishihara

Yoshinori Ohtsuka

Nobuyoshi Sakakibara

Atsushi Mizutani

Tokio Kohama

Akira Kato

Takashi Shigematu

Michitoshi Onoda

Minoru Yamamoto

Takamoto Watanabe

Keiji Aoki

Eturo Yasuda

Mamoru Kobashi

Masanori Hanaoka

Yukihide Hashiguchi

Masahiko Osada

Kazuhiko Sugiura

Shigetaka Takada

Teiichi Nabeta

Yoshihiro Segawa

Naohito Mizuno

Tomoya Uchida

Shinichi Mukainakano

Takashi Taguchi

Mitutaka Katada

Masumi Arai

Takayuki Tominaga

Yasunori Taga

Yukihiro Takeuchi

Hitoshi Yoshida

Akira Fukami

Toru Mizuno

Seiji Fujino

Mitsutaka Katada

Hiroki Noguchi

Kenji Hayashi

Katsunori Abe

Junichiro Naito

Hidetoshi Muramoto

Michio Hisanaga

Hideki Obayashi

Toshimasa Yamamoto

Satoshi Nakamura

Hisayoshi Fujikawa

Kinya Atsumi

Shizuo Tokito

Koji Noda

Kazuhiro Tsuruta

Hirotane Ikeda

Hiroyuki Kishita

Kouichi Hoshino

Yuji Takeda

Fumio Ohara

Teruyoshi Ito

Novuei Ito

Masamichi Shibata

Muneaki Matsumoto

Shigeyuki Akita

Kazuhiko Kano

Hitoshi Yamaguchi

Toshiyuki Kawai

Kazuoki Matsugatani

Masao Kodera

Hiroaki Himi

Kunihiko Sasaki

Shoichi Onda

Mitsuru Asano

Ken Nishioka

Takashi Hagiwara

Minoru Kato

Hideki Saito

Masanori Fukutani

Kunimasa Yoshimura

Toshiki Kobayashi

Masao Nagakubo

Hiroshi Uesugi

Yoshitaka Gotoh

Hideya Yamadera

Kouichi Mori

A second display panel having a lower luminance is combined with a first display panel having a higher luminance, forming a combined display panel. The entire surface of the combined display panel is covered with a dimming filter for ornamental purpose. Transparency of the dimming filter is enhanced in a wave-length region of the light emitted from the second panel to alleviate a brightness imbalance between the first and second panels. The transparency is enhanced also in another wave-length region corresponding to light complementary to the light emitted from the second panel, so that a color shift of the display of the first panel is avoided. Preferably, an electroluminescent display panel which emits light having a sharp peak in a specific wave-length region is used as the second panel.

Combined display panel

A thin-film EL display panel which has excellent packageability, high reliability and stable performance characteristics, and which can prevent nonuniformity of brightness and color from occurring and a fabrication method thereof are provided. In the above thin-film EL display panel, two thin-film EL elements,and,formed by sequentially laminating first electrodes,and,, first insulating layers, luminescent layers, second insulating layers and second electrodes,and,respectively on glass substrates,and,are laminated into position and connecting terminal portions,and,for connecting the first electrodes,and,and second electrodes,and,are formed on the edge portions of the substrates,and,of the thin-film EL elements,and,. connecting pad portions,and,which correspond respectively to the connecting terminal portions,and,of the thin-film EL element,are provided on the edge portions on the substrate of the thin-film EL element,, the connecting pad portions are connected to the connecting terminal portions of the other thin-film EL element via conductive coupling sections,and the connecting pad portions and the connecting terminal portions to which lead wires are connected are provided on the edge portion of one substrate at a position where both substrates will not be laminated.

Thin-film El display panel having uniform display characteristics

Disclosed is a method of producing an electroluminescent (EL) device having a CaGa,S,:Ce luminescent layer. The ratio of the X-ray diffraction peak intensity I,for the (200) reflection of CaS to the X-ray diffraction peak intensity I,for the (400) reflection of CaGa,S,as appearing in the X-ray diffraction spectrum for the luminescent layer, I,/I,, is 0.1 or less. The amount of the impurity CaS in the luminescent layer is reduced. The EL device produces blue emission with high purity.

Sputtering method of producing and electroluminescent device with improved blue color purity

A transparent display panel such as an electroluminescent panel is overlapped on a part of a conventional instrument panel for use in an automobile. The overlapped display panel displays additional information such as navigation maps when required and is turned off under a normal driving condition. When the overlapped transparent display panel is turned off, the conventional instrument panel displays information such as a vehicle speed, an engine speed and so forth. In this situation, overall luminance on the combined display panel is made uniform throughout a whole surface including the area where the transparent display panel is overlapped. To realize the uniformity of luminance, brightness of back lamps for illuminating the instrument panel is adjusted or a filter having an adequate transparency is used. The combined display panel may be also made by combining a non-transparent display panel with a conventional instrument panel. A filter may be used in this case to attain an overall uniform luminance on the combined display panel.

The present invention provides a semiconductor physical-quantity sensor which can perform measurement of high accuracy without occurrence of deformation or displacement of a fixed electrode for vibration use even if voltage applied to the fixed electrode for vibration use is changed, and which can increase a dielectric breakdown voltage between the fixed electrode for vibration use and a substrate without varying a thickness of an insulative sacrificial layer or causing sacrificial-layer etching time to be affected. A semiconductor physical-quantity sensor according to the present invention forms an electrode-anchor portion on a sufficiently thick insulation film and causes dielectric breakdown voltage with a semiconductor substrate to be increased. In particular, the sufficiently thick insulation film is given by a LOCOS oxide film formed during sensor detection-circuit fabrication or separation of a diffusion electrode.

Semiconductor physical-quantity sensor having a locos oxide film, for

In an EL device in which a blue light emitting material obtained by doping Ce as a luminescent center into CaGa.sub.X S.sub.Y host material is used for a luminescent layer, values of X and Y in the CaGa.sub.X S.sub.Y host material are set in ranges of 1.4.ltoreq.X.ltoreq.1.9, 2.9.ltoreq.Y.ltoreq.3.8. The blue light emitting material thus obtained has a new structure defined by the fact that an X-ray diffraction spectrum obtained by using Cu K.alpha. radiation as a X-ray source has at least one peak in diffraction angles of 13.5.+-.0.2 degree, 14.6.+-.0.2 degree and 25.7.+-.0.2 degree. The blue light emitting EL device has a luminance higher than that of a conventional EL device.

Blue light emitting material, electroluminescent device using same and

A transparent display panel such as an electroluminescent panel is overlapped on a part of a conventional instrument panel for use in an automobile. The overlapped display panel displays additional information such as navigation maps when required and is turned off under a normal driving condition. When the overlapped transparent display panel is turned off, the conventional instrument panel displays information such as a vehicle speed, an engine speed so and so forth. In this situation, overall luminance on the combined display panel is made uniform throughout a whole surface including the area where the transparent display panel is overlapped. To realize the uniformity of luminance, brightness of back lamps for illuminating the instrument panel is adjusted or a filter having an adequate transparency is used. The combined display panel may be also made by combining a non-transparent display panel with a conventional instrument panel. A filter may be used in this case to attain an overall uniform luminance on the combined display panel.

In an electroluminescent element in which a first electrode, a first insulating layer, a luminescent layer, a second insulating layer and a second electrode are sequentially laminated on a substrate, the luminescent layer has a first and second luminescent portions which are located apart from each other. A color filter is provided above one of the first and second luminescent portions. The second electrode includes a first part electrode for activating the first luminescent portion and a second part electrode for activating the second luminescent portion. The color filter is formed so that a portion extending from a bottom face of the color filter is inserted into a gap between the first and second luminescent portions to surround an upper face and side faces of the one of the first and second luminescent portions.

Electroluminescent display element and manufacturing method for

An electroluminescent device improved in brightness is disclosed. The electroluminescent device comprising sequentially stacked layers having an optically transparent material on at least the viewing side of the structure comprises a luminescent layer based on a Group II-III-VI compound host material with an element acting as a luminescent center added therein, wherein a Group II element having an ion radius differing from that of the Group II element constituting the compound host material is further added in the luminescent layer.

Method for fabricating electroluminescent device

A thin-film electroluminescent device includes dielectric layers having improved dielectric characteristics. The device is fabricated by forming a first transparent electrode layer of ITO, a first dielectric layer, a luminescent layer, a second dielectric layer, and a second transparent electrode layer of ITO in this order on an insulating substrate. Each of the two dielectric layers is a film constituted by TaSnON. That is, the film includes tantalum, tin, oxygen, and nitrogen.

Dielectric thin film and thin-film EL device using same

Fabrication of an electroluminescent device having a high-quality luminescent layer is disclosed. The device emits intense blue light. A first electrode layer, a first dielectric layer, the luminescent layer, a second dielectric layer, and a second electrode layer are successively formed on a glass substrate. At least the exit side of the device is made from an optically transparent material. A first gaseous source material of a group II element belonging to group II of the periodic table, a second gaseous source material of a group VIB element belonging to group VIB, and a third gaseous source material of an element forming the luminescent center of the luminescent layer are supplied into a reaction furnace through first, second, and third gas supply tubes, respectively, and caused to react with each other. Thus, the luminescent layer is formed by chemical vapor deposition. The first material acts as a base material from which the luminescent layer is formed. The first tube for the first material is laid in the center of the furnace. The third tube for the third material forming the luminescent center is laid around the first gas supply tube. The second tube is laid around the third tube.

Method and apparatus for fabricating electroluminescent device

In an electroluminescent device comprising an insulating substrate having consecutively thereon a first electrode, a first insulating layer, a luminescent layer composed of two types or more luminescent portions differing in luminescent color which are provided in a flat panel arrangement to give a single-layered luminescent layer, a second insulating layer and a second electrode, a first dielectric film is disposed between the luminescent portions to provide an isolation layer for isolating the luminescent portions, and a second dielectric film for adjusting the luminescence threshold voltage is disposed on the light outcoupling side or on the side opposite thereto of one of said luminescent portions. Herein, the first and second dielectric films provided for isolating the luminescent portions and for adjusting the luminescence threshold voltage, respectively, are made of the same material and have a refractive index lower than that of both luminescent portions.

Process for fabricating an electroluminescent device

A method and apparatus for manufacturing EL devices in a short period of time wherein during formation of a light emitting layer composed of II, III or VI-group of elements doped with a light emitting element through a chemical vapor deposition method, water content of a transport gas that transports gasified organic metals is removed through a dehydration filter and thus, source material decomposition due to the water content is prevented and a steady supply of source materials becomes possible. By removing the water content of the transport gas, source materials can be supplied constantly even if heating temperatures exceed a temperature conventionally regarded as the temperature at which decomposition starts and thus, a light emitting layer having a practical thickness can be formed in a short period of time. Because of the high-speed film formation, the rate of the film being contaminated with impurities lessens and the light emitting layer has a luminance three times that of conventional layers.

High-speed method for manufacturing an electroluminescent device using

To eliminate uneven luminance between columns, and along with this, to eliminate uneven luminance also among EL elements in several columns in an EL display device for performing matrix display, in a matrix type EL display device in which a scan voltage is sequentially applied to scan electrodes and EL elements are caused to electroluminesce by this scan voltage and a data voltage, a pulse width of the scan voltage is kept uniform, and together with this, a charging period for the EL elements is varied in accordance with a number of light emitting pixels in a line scanned and driven to eliminate uneven luminance between columns. Additionally, a holding period for holding a charging voltage is provided to alleviate differences in terminal voltages among the EL elements due to wiring resistance delay and to eliminate uneven luminance among the EL elements.

Electroluminescent display device having uniform display element column

A transparent thin-film EL display apparatus has a transparent thin-film EL element formed on a glass substrate. A rear substrate consisting of photochromic glass and the glass substrate on which the EL element is formed are disposed facing each other with the EL element located in between. A light-transmitting insulation material is inserted in a space between the two substrates and hermetically sealed. When the display on the EL element becomes hard to see due to light entering from the rear of the display apparatus, the photochromic glass reacts in response to the light and darkens the rear of the EL element, thereby blocking the light. Accordingly, normally the display apparatus displays various items of information through the front substrate and ensures visibility of the background through the display apparatus, and when high-intensity external light enters through the rear, the display apparatus reacts and blocks this light by means of a light shutter function, thereby enabling reliable display of the information without impairment of display contrast, thus guaranteeing a stable and highly reliable display.

Transparent thin-film EL display apparatus

Growing community of inventors

Okazaki, Japan

Tadashi Hattori