US4807047A — Electro luminescence device and electrophotograph…

Claim 1

Independent Claim 246 words

An electrophotographic printing system comprising: means movable along a predetermined path and coated with a light sensitive medium, means for precharging said light sensitive medium, means for forming a latent image on said light sensitive medium, means for attaching a printing medium at said latent image formed portions on said light sensitive medium, means for transferring said attached printing medium from said light sensitive medium, and means for discharging said light sensitive medium, said latent image forming means comprising an EL device, means for focusing light emitting from said EL device onto said light sensitive medium and means for controlling the energization of said EL device, said EL device comprising: a light emitting layer; a plurality of first electrodes, each comprising a plurality of spaced, electrically connected electrode segments; a plurality of spaced second electrodes, each comprising a plurality of spaced, electrically connected electrode portions, said first and second electrodes being arranged on respective opposite sides of said light emitting layer, with each first electrode segment disposed in electro luminescing relationship with respect to a corresponding second electrode portion to form an EL element therebetween, and with each first electrode forming such an EL element with each second electrode, said EL elements being disposed in a single line extending transversely of said path, whereby an AC energizing pulse supplied by said controlling means between a given first electrode and a given second electrode causes the EL element formed therebetween to emit light to said focusing means.

Claim 2

Dependent Claim 246 words

An electrophotographic printing system comprising: means movable along a predetermined path and coated with a light sensitive medium, means for precharging said light sensitive medium, means for forming a latent image on said light sensitive medium, means for attaching a printing medium at said latent image formed portions on said light sensitive medium, means for transferring said attached printing medium from said light sensitive medium, and means for discharging said light sensitive medium, said latent image forming means comprising an EL device, means for focusing light emitting from said EL device onto said light sensitive medium and means for controlling the energization of said EL device, said EL device comprising: a light emitting layer; a plurality of first electrodes, each comprising a plurality of spaced, electrically connected electrode segments; a plurality of spaced second electrodes, each comprising a plurality of spaced, electrically connected electrode portions, said first and second electrodes being arranged on respective opposite sides of said light emitting layer, with each first electrode segment disposed in electro luminescing relationship with respect to a corresponding second electrode portion to form an EL element therebetween, and with each first electrode forming such an EL element with each second electrode, said EL elements being disposed in a single line extending transversely of said path, whereby an AC energizing pulse supplied by said controlling means between a given first electrode and a given second electrode causes the EL element formed therebetween to emit light to said focusing means.

Claim 3

Dependent Claim 34 words

An electrophotographic printing system as set forth in claim 1 wherein said control means comprises a plurality of circuit elements driving respective first electrodes and a plurality of circuit elements driving respective second electrodes.

Claim 4

Dependent Claim 72 words

An electrophotographic printing system as set forth in claim 2 wherein said control means is operable for repeatedly energizing said EL elements a predetermined number of times with data for forming a latent image in a predetermined period within a predetermined ON time by supplying AC energizing pulses between said first electrodes and said second electrodes through said driving circuit elements, and for deenergizing said EL elements for a predetermined OFF time.

Claim 5

Dependent Claim 59 words

An electrophotographic printing system as set forth in claim 3 wherein said predetermined number of times and said predetermined period are designed to cause emission of a predetermined light intensity sufficient to form said latent image, and said OFF time is designed to permit decrease of said emitted light to a level which will not form a latent image.

Claim 6

Dependent Claim 31 words

An electrophotographic printing system as set forth in claim 1 wherein the pitch between adjacent electrode portions of each second electrode is defined by the resolution of the latent image formation.

Claim 7

Dependent Claim 35 words

An electrophotographic printing system as set forth in claim 1 wherein said first electrodes are arranged in a belt form, said belt-form first electrodes being disposed to intersect said second electrodes in a meander manner.

Claim 8

Dependent Claim 34 words

An electrophotographic printing system as set forth in claim 6 wherein said control means comprises a plurality of circuit elements driving respective first electrodes and a plurality of circuit elements driving respective second electrodes.

Claim 9

Dependent Claim 41 words

An electrophotographic printing system as set forth in claim 7 wherein said control means comprises means for arranging the order of data to form a latent image defined by the position of said meander form first electrodes intersecting said second electrodes.

Claim 10

Dependent Claim 72 words

An electrophotographic printing system as set forth in claim 8 wherein said control means is operable for repeatedly energizing said EL elements a predetermined number of times with data for forming a latent image in a predetermined period within a predetermined ON time by supplying AC energizing pulses between said first electrodes and said second electrodes through said driving circuit elements, and for deenergizing said EL elements for a predetermined OFF time.

Claim 11

Dependent Claim 59 words

An electrophotographic printing system as set forth in claim 9 wherein said predetermined number of times and said predetermined period are designed to cause emission of a predetermined light intensity sufficient to form said latent image, and said OFF time is designed to permit decrease of said emitted light to a level which will not form a latent image.

Claim 12

Dependent Claim 29 words

An electrophotographic printing system according to claim 10 wherein the pitch between adjacent electrode portions of said second electrode is defined by the resolution of the latent image formation.

Claim 13

Dependent Claim 22 words

An electrophotographic printing system as set forth in claim 6 wherein said meander form of said first electrodes is rectangular in shape.

Claim 14

Dependent Claim 22 words

An electrophotographic printing system as set forth in claim 6 wherein said meander form of said first electrodes is trapezoidal in shape.

Claim 15

Dependent Claim 22 words

An electrophotographic printing system as set forth in claim 6 wherein said meander form of said first electrodes is semi-circular in shape.

Claim 16

Dependent Claim 36 words

An electrophotographic printing system as set forth in claim 1 wherein said second electrodes are arranged in two separate groupings with the groupings spaced apart a predetermined distance to present separate arrays of said EL elements.

Claim 17

Dependent Claim 36 words

An electrophotographic printing system as set forth in claim 15 wherein said control means comprises two sets of circuit elements for driving respective first electrodes and two sets of circuit elements for driving respective second electrodes.

Claim 18

Dependent Claim 55 words

An electrophotographic printing system as set forth in claim 16 wherein said control means comprises means for alternatively providing the same data to the sets of circuit elements in response to the moving speed of said light sensitive medium so that the same positions on the latter may be exposed twice to the same data.

Claim 19

Dependent Claim 72 words

An electrophotographic printing system as set forth in claim 17 wherein said control means is operable for repeatedly energizing said EL elements a predetermined number of times with data for forming a latent image in a predetermined period within a predetermined ON time by supplying AC energizing pulses between said first electrodes and said second electrodes through said driving circuit elements, and for deenergizing said EL elements for a predetermined OFF time.

Claim 20

Dependent Claim 59 words

An electrophotographic printing system as set forth in claim 18 wherein said predetermined number of times and said predetermined period are designed to cause emission of a predetermined light intensity sufficient to form said latent image, and said OFF time is designed to permit decrease of said emitted light to a level which will not form a latent image.

Claim 21

Dependent Claim 31 words

An electrophotographic printing system as set forth in claim 19 wherein the pitch between adjacent electrode portions of the second electrode is defined by the resolution of the latent image formation.

Claim 22

Dependent Claim 34 words

An electrophotographic printing system as set forth in claim 15 wherein said first electrodes are arranged in a belt form, said belt-form first electrodes intersecting each of said second electrodes in a meander manner.

Claim 23

Dependent Claim 36 words

An electrophotographic printing system as set forth in claim 21 wherein said control means comprises two sets of circuit elements for driving respective first electrodes and two sets of circuit elements for driving respective second electrodes.

Claim 24

Dependent Claim 78 words

An electrophotographic printing system according to claim 22 wherein said control means comprises means for alternatively providing the same data to said sets of control elements in response to the moving speed of the light sensitive medium so that the same positions on the latter are exposed twice to the same data and means for arranging the order of data to form a latent image defined by the position of said meander-form first electrodes intersecting the second electrodes.

Claim 25

Dependent Claim 72 words

An electrophotographic printing system as set forth in claim 23 wherein said control means is operable for repeatedly energizing said EL elements a predetermined number of times with data for forming a latent image in a predetermined period within a predetermined ON time by supplying AC energizing pulses between said first electrodes and said second electrodes through said driving circuit elements, and for deenergizing said EL elements for a predetermined OFF time.

Claim 26

Dependent Claim 59 words

An electrophotographic printing system as set forth in claim 24 wherein said predetermined number of times and said predetermined period are designed to cause emission of a predetermined light intensity sufficient to form said latent image, and said OFF time is designed to permit decrease of said emitted light to a level which will not form a latent image.

Claim 27

Dependent Claim 31 words

An electrophotographic printing system as set forth in claim 25 wherein the pitch between adjacent electrode portions on said second electrode is defined by the resolution of the latent image formation.

Claim 28

Dependent Claim 22 words

An electrophotographic printing system as set forth in claim 21 wherein said meander form of said first electrodes is rectangular in shape.

Claim 29

Dependent Claim 22 words

An electrophotographic printing system as set forth in claim 21 wherein said meander form of said first electrodes is trapezoidal in shape.

Claim 30

Dependent Claim 22 words

An electrophotographic printing system as set forth in claim 21 wherein said meander form of said first electrodes is semi-circular in shape.

Claim 31

Dependent Claim 194 words

An elongated plane-illumination type electro luminescence device comprising: a transparent substrate: first transparent electrode means formed on said substrate; a light emitting layer embedded in an insulating layer on said first electrode means; second electrode means formed on said insulating layer on the opposite side of the light emitting layer from said first electrode means, said first transparent electrode means comprising a plurality of first electrode groups, each including a plurality of spaced, electrically connected electrode segments, said second electrode means comprising a plurality of spaced second electrode groups, each including a plurality of spaced, electrically connected electrode portions, said first and second electrode groups being arranged with each first electrode segment disposed in electro luminescing relationship with respect to a corresponding second electrode portion to form an EL element therebetween and with each first electrode group forming such an EL element with each second electrode group, said EL elements being disposed in a single line extending longitudinally of the device; and control means for supplying an AC energizing pulse between a given first electrode group and a given second electrode group to thereby cause the corresponding EL element formed therebetween to emit light.

Claim 32

Dependent Claim 194 words

An elongated plane-illumination type electro luminescence device comprising: a transparent substrate: first transparent electrode means formed on said substrate; a light emitting layer embedded in an insulating layer on said first electrode means; second electrode means formed on said insulating layer on the opposite side of the light emitting layer from said first electrode means, said first transparent electrode means comprising a plurality of first electrode groups, each including a plurality of spaced, electrically connected electrode segments, said second electrode means comprising a plurality of spaced second electrode groups, each including a plurality of spaced, electrically connected electrode portions, said first and second electrode groups being arranged with each first electrode segment disposed in electro luminescing relationship with respect to a corresponding second electrode portion to form an EL element therebetween and with each first electrode group forming such an EL element with each second electrode group, said EL elements being disposed in a single line extending longitudinally of the device; and control means for supplying an AC energizing pulse between a given first electrode group and a given second electrode group to thereby cause the corresponding EL element formed therebetween to emit light.

Claim 33

Dependent Claim 33 words

An electro luminescence device as set forth in claim 30 wherein said first electrode means is arranged in a belt form and disposed to intersect said second electrode means in a meander manner.

Claim 34

Dependent Claim 23 words

An electro luminescence device as set forth in claim 31 wherein said meander form of said first electrode groups is rectangular in shape.

Claim 35

Dependent Claim 23 words

An electro luminescence device as set forth in claim 31 wherein said meander form of said first electrode means is trapezoidal in shape.

Claim 36

Dependent Claim 23 words

An electro luminescence device as set forth in claim 31 wherein said meander form of said first electrode means is semi-circular in shape.

Claim 37

Dependent Claim 37 words

An electro luminescence device as set forth in claim 30 wherein said second electrode groups are arranged in two separate groupings with the groupings spaced apart a predetermined distance to present separate arrays of said EL elements.

Claim 38

Dependent Claim 35 words

An electro luminescence device as set forth in claim 35 wherein said first electrode means is arranged in a belt form and disposed to intersect each of said second electrode groupings in a meander manner.

Claim 39

Dependent Claim 23 words

An electro luminescence device as set forth in claim 36 wherein said meander form of said first electrode means is rectangular in shape.

Claim 40

Dependent Claim 23 words

An electro luminescence device as set forth in claim 36 wherein said meander form of said first electrode means is trapezoidal in shape.

Claim 41

Dependent Claim 23 words

An electro luminescence device as set forth in claim 36 wherein said meander form of said first electrode means is semi-circular in shape.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1992-02-21	1992-08-22	1993-02-21	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1996-02-21	1996-08-22	1997-02-21	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2000-02-21	2000-08-22	2001-02-21	$7700.00	Window Closed / Lapsed

Electro luminescence device and electrophotographic printing system using the same

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