 Image recording apparatus |
| I claim: 1. An image recording apparatus comprising: a raster scan display screen for displaying an ... |
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| FM demodulator having a frequency independent delay circuit |
| An object of the present invention is to provide an FM demodulator, employing delay circuits, which ... |
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| Apparatus for recording and reproducing a video signal |
| Accordingly, it is an object of the present invention to provide an apparatus for recording and ... |
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| Circuit arrangement for the equalization of digital signals received in analog form |
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| Data recording apparatus |
| It is an object of the present invention to provide a data recording apparatus which can solve the ... |
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| Digital transmission signal processing system and recording/reproducing system |
| An object of the present invention is to provide a digital VTR in which high-speed recording onto a ... |
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| Video signal processing apparatus |
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| Continuous looping feature in transmission of HDTV signals |
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| Image input device |
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| Method and system for first-order RF amplitude and bias control of a modulator |
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Electro luminescence device and electrophotographic printing system using the same
| Details |
Inventors: Sato, Seii; Wakitani, Masayuki; Hasegawa, Tadashi; Miura, Shoshin; Andoh, Shizuo; Takizawa, Hideaki; Kobayashi, Tetsuya; Takahara, Kazuhiro; Kawada, Toyoshi; Hoshiya, Takayuki; Kisumi, Shintaro;
Assignee: Fujitsu Limited (Kawasaki, JP)
Primary Examiner: Shaw; Clifford C.
Assistant Examiner:
Attorney, Agent or Firm: Staas & Halsey
An EL device having an electrode arrangement including first electrodes and at least one row of second electrodes intersecting the first electrodes and energized by a combination of the first and second electrodes. The second electrodes are divided into a plurality of sub-electrode portions. The electrode arrangement is such that the first electrodes each comprise a plurality of segments that are commonly-connected and intersect different sub-electrode portions. Another electrode arrangement is such that the first electrodes are arranged in a belt form and intersect different sub-electrodes portions in a meander manner. The EL device can be applied to an electrophotographic printing system as an optical system for forming a latent image. EL elements are repeatedly energized with the same data to give a sufficient intensity of light on a light sensitive medium, and deenergized for a time in which the intensity is decreased to a low level. |
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DETAILED DESCRIPTION An object of the present invention is to provide an EL device having an electrode arrangement including a reduced number of driving electrodes.
Another object of the present invention is to provide an EL device having an electrode arrangement by which the manufacturing cost and device size are reduced.
Still another object of the present invention is to provide an EL device having an electrode arrangement capable of emitting high intensity light.
Yet another object of the present invention is to provide a control circuit suitable for controlling and driving the above mentioned EL devices.
A further object of the present invention is to provide an EL device and a control circuit suitable for application in an electrophotographic printing system.
Therefore, according to the present invention, there is provided an EL device including a transparent substrate; a first transparent electrode set formed on the substrate; a light emitting layer embedded in an insulating layer on the first electrode set; and a second electrode set formed on the insulating layer on the opposite side of the high emitting layer from the first electrode set.
The first electrode set having a plurality of electrodes and the second electrode set having at least one row of electrodes intersecting the plurality of first electrodes.
A plurality of EL elements are defined in the light emitting layer at intersecting portions of the first electrodes and the second electrodes.
The second electrodes are separated into a predetermined number of sub-electrode portions.
The first electrodes are grouped in a predetermined number of groups, and corresponding electrodes in these groups are electrically connected.
Each of the EL elements is energized by a combination of the sub-electrodes of the second electrode and the grouped first electrodes, when supplied with a predetermined AC energizing pulse therebetween.
In another aspect of the present invention, the first electrodes are arranged in a belt form and the belt-formed first electrodes intersect the sub-electrodes in a meander (zigzag) manner
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