Hitachi Device Engineering Co., Ltd.

Other

Hitachi, Ltd.

Hitachi Displays, Ltd.

Jun Ishikawa

Yoshiyuki Kaneko

Shigemi Hirasawa

Susumu Sasaki

Yuuichi Kijima

Hiroshi Kawasaki

Tomoki Nakamura

Kenji Miyata

Toshihiro Sato

Takuo Kaitoh

Hiroko Hayata

Yutaka Kuriyama

Yuichi Numata

Shigeo Shimomura

Morimasa Ueda

Hiroki Masuda

A display device includes a front substrate having an anode and fluorescent materials on an inner surface, and a back substrate having a plurality of cathode lines and include electron sources, and a plurality of control electrodes allow electrons from the electron sources to emit to the front substrate side, on an inner surface thereof. The back substrate is arranged to face the front substrate in an opposed manner with a given gap therebetween, and an outer frame for holding the given gap is interposed between the front substrate and the back substrate and extends around the display region. An inner frame is arranged outside the display region and inside the outer frame, and a getter is provided between the outer frame and the inner frame.

Display device

The present invention provides a display device which can sufficiently ensure spaces for mounting distance holding memberswhen the distance holding membersare mounted, can facilitate the assembling and can realize the electron emission characteristics of high performance. At least two different types of gaps b, c (b&#x3c;c) are provided among cathode lines(R,G,B) and the distance holding membersare mounted at portions of the gaps c having a larger size whereby the space for mounting the distance holding memberscan be sufficiently ensured.

Display device having a large number of cathode lines

Inside an outer frame, which is interposed at between opposedly facing peripheries between a back substrate and a front substrate, there is an inner frame which fixes both end portions of plate member control electrodes, which are constituted of a large number of parallel strip-like electrode elements. By integrally forming the plate member control electrodes such that the plate member control electrodes are fixed to both end portions of a display region, a single part is formed. Further, a getter chamber is formed between the outer frame and the inner frame and getters are accommodated in the getter chamber. Due to such a constitution, the operability and yield rate of products at the time of assembling can be enhanced. Further, it is possible to hold a desired degree of vacuum in the space between the substrates for a long time.

A display device of the present invention reduces the occurrence of cracks and breaking of plate-like control electrodes, enhances the operability of assembling and suppresses the reduction of a yield factor of products. The display device includes a back substrate which has a plurality of cathode lines which extend in one direction, are arranged in parallel in another direction which crosses one direction and include electron sources respectively, and a plurality of control electrodes which cross the cathode lines in a non-contact manner within a display region, extend in another direction and are arranged in parallel in one direction on an inner surface thereof, and a front substrate which has anodes and phosphors on an inner surface thereof and faces the back substrate with a given distance therebetween. The control electrodes are formed of plate-like control electrodes. The plate-like control electrode includes electron passing holes which allow electrons emitted from the electron sources to pass therethrough in the display region. Further, the plate-like control electrode has a portion which is fixed to the back substrate in an external non-display region. Still further, the plate-like control electrode has at least a portion in the external non-display region where the strength of the plate-like control electrode is gradually changed toward an end portion thereof in the extending direction.

Display device with plate-like control electrodes

An optical measuring light path formed by a vacuum-side laser beam (Pa) as a reference standard and an optical measuring light path formed by a gas-side laser beam (Pb) as a dimension to be measured are coaxially located sandwiching a movable end (optical transparent body ) of a vacuum container ( ) in order to satisfy Abbe's principle requiring linear disposition of the reference standard and the dimension to be measured in measurement direction, thereby reducing measurement error in measuring air refractive index and improving measurement accuracy therefor.

Air refractometer

A TFT display device realizing a high degree of fineness by integrally forming a TFT display panel and a drive circuit therefor by using a poly-Si film. The display device comprises TFT transistors of which the gates are connected to the scanning lines and of which the drains are connected to the signal lines that are so formed as to intersect one another substantially at right angles, a TFT display panel having pixel electrodes provided at sources of the TFT transistors, a signal line drive circuit which is formed on the display panel and permits pixel signals that are serially input to be output in parallel, and a scanning line drive circuit which is formed on the display panel and simultaneously selects the two neighboring scanning lines while changing the combination thereof for each of the fields, wherein for the pixels of two rows that are simultaneously selected by the scanning line drive circuit, the signal written into the pixels corresponding to one row has a polarity opposite to that of the signal written into the pixels corresponding to the other row. Therefore, despite the two rows are simultaneously selected, signals of opposite polarities are fed to these rows, whereby flickering decreases and noise transmitted to the signal lines and to a common plate electrode is canceled, making it possible to accomplish stable display operation.

Liquid crystal display device having a thin film

Growing community of inventors

Mobara, Japan

Jun Ishikawa