Patent EP0086907A2 successfully refreshed from Google Patents.
EP0086907A2
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EP
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Recording apparatus
Assignee: Agfa Gevaert NV
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Filing: 1982-10-25
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Granted: —
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Expires: 2002-10-25
Abstract
Abstract A recording device for linearly recording information upon a moving photoreceptor, wherein the shortcomings of prior art devices, namely difficulties in the production of defect-free recording heads, and the use of delicate electrical connection structures are overcome. The device comprises a recording head with a plurality of modules (23), each module comprising LED chip means (31) with a length (n) greater than the length (o) of the base plate of the module, and integrated control circuits (34, 35) for the LED's that are mounted on the base plate of the module.
Inventors
- 👤 Lucien Amedé De Schamphelaere
- 👤 Etienne Marie De Cock
- 👤 Werner Edmond De Bondt
- 👤 Freddy Maurice Librecht
- 👤 Gerard Jozef Boeve
- 👤 Willy Frans Van Peteghem
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 09:23
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/195; H04N1/19505; H04N1/19515; B; B41; B41J; B41J2/00; B41J2/435; B41J2/447; B41J2/45; B41J2/451; G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1238; G06K15/1242; G06K15/1247; H04N1/024; H04N1/032; H04N1/036; H04N1/19521; H04N1/19573; H10; H10W; H10W90/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
296 words
A recording apparatus for linewise recording information on a moving photoreceptor, said apparatus comprising a recording head with a multiplicity of addressable and energisable pointlike radiation sources (11) in at least one row (24,25) extending transversely of the direction in which the photoreceptor (20) moves when the system is in use, said row being composed by the assembly in alignment of a plurality of chips (31) on each of which at least one row of uniformly spaced radiation sources (11) is formed, and said apparatus comprising also electrical control means for said radiation sources, characterized in that said recording head comprises an elongate metal bar (22) onto which a plurality of modules (23) are fitted in good heat-conductive relationship, each module comprises an electrically conductive base plate (29) onto which radiation source chip means is mounted in good electrical and heat-conductive relationship, the length (o) of each base plate being smaller than the length (n) of the chip means thereon so that on at least one side of the base plate a chip end extends beyond the boundary of the base plate, the chip ends are cut so close to the outermost radiation source on the chip means, and the modules with the chip means are mounted so closely ranged next to each other, that at least one uninterrupted row of equally spaced radiation sources is formed along the length of the recording head, and that the electrical control means is in the form of at least one control chip (34) mounted on each module for a row of . radiation sources, the control chip running parallel with the row of radiation sources and being provided with a plurality of output terminals (78) that are each connected by wire bonding (39) to a corresponding radiation source.
Claim 2
Dependent Claim
296 words
A recording apparatus for linewise recording information on a moving photoreceptor, said apparatus comprising a recording head with a multiplicity of addressable and energisable pointlike radiation sources (11) in at least one row (24,25) extending transversely of the direction in which the photoreceptor (20) moves when the system is in use, said row being composed by the assembly in alignment of a plurality of chips (31) on each of which at least one row of uniformly spaced radiation sources (11) is formed, and said apparatus comprising also electrical control means for said radiation sources, characterized in that said recording head comprises an elongate metal bar (22) onto which a plurality of modules (23) are fitted in good heat-conductive relationship, each module comprises an electrically conductive base plate (29) onto which radiation source chip means is mounted in good electrical and heat-conductive relationship, the length (o) of each base plate being smaller than the length (n) of the chip means thereon so that on at least one side of the base plate a chip end extends beyond the boundary of the base plate, the chip ends are cut so close to the outermost radiation source on the chip means, and the modules with the chip means are mounted so closely ranged next to each other, that at least one uninterrupted row of equally spaced radiation sources is formed along the length of the recording head, and that the electrical control means is in the form of at least one control chip (34) mounted on each module for a row of . radiation sources, the control chip running parallel with the row of radiation sources and being provided with a plurality of output terminals (78) that are each connected by wire bonding (39) to a corresponding radiation source.
Claim 3
Dependent Claim
35 words
A recording apparatus according to claim 1, wherein the ends of the radiation source chip means extend at both sides of the base plates of the modules beyond the corresponding edge of the base plate.
Claim 4
Dependent Claim
65 words
A recording apparatus according to claim 1 or 2, wherein said control chip comprises integrated shift register means, latch register means and drivers, and also an input terminal for the serial-in loading of the shift register means and an output terminal for connection of the shift register means to the input terminal of the shift register means of the control chip of the next module.
Claim 5
Dependent Claim
52 words
A recording apparatus according to claim 1, 2 or 3, wherein each module comprises radiation source chip means with two staggered parallel rows of radiation sources, and two control chips, one at each side of the radiation source chip means, each control chip being connected with the adjacent row of radiation sources.
Claim 6
Dependent Claim
116 words
A recording apparatus according to claim 1, 2 or 3, wherein each module comprises radiation source chip means (96,97,98,99) with one row of radiation sources and a control chip (100,101) that is connected with the respective radiation sources of said chip means, wherein a module (92,94) forms with a second identic module that is rotated over 180 degrees as compared with the first one a module pair (92,93,94,95), the relative positioning of both modules being such that the radiation sources of both rows are staggered with respect to each other, and a plurality of module pairs are lengthwise assembled to produce two uninterrupted rows (103,104) of staggered radiation sources over the length of the recording head.
Claim 7
Dependent Claim
104 words
A recording apparatus according to claim 4, wherein at least the two portions (85,86) of the ends (40,41) of each radiation source chip which cross the rows (24,25) of radiation sources are generally inclined with respect to said rows, and the sum of the distance (a,,,a 2 ) separating the centres of the end radiation sources of each sub-row on the chip from the adjacent said chip end portions, said distances being measured along lines passing through the centres of the radiation sources of the respective row, is not greater than the spacing (b) between the centres of neighbouring radiation sources in such sub-row.
Claim 8
Dependent Claim
54 words
A recording apparatus according to claim 6, wherein the angle a between said general direction of said end portions (85,86) and the direction of movement (52) of said photoreceptor is such that tg α= s/d, wherein s is the staggering between two rows of sources, and d is the distance between said two rows.
Claim 9
Dependent Claim
12 words
A recording apparatus according to claim 7, wherein oc = 26.5650 degrees.
Claim 10
Dependent Claim
62 words
A recording apparatus according to any of claims 6 to 8, wherein the base plates of the modules have straight side edges that, at the location where the radiation source chip means extend beyond the base plates, are interrupted by an edge portion the inclination of which runs parallel with the inclination of the end portion of the radiation source chip means.
Claim 11
Dependent Claim
17 words
A recording apparatus according to any of claims 1 to 9, wherein said sources are light-emitting diodes.
Claim 12
Dependent Claim
21 words
A recording apparatus according to any of claims 1 to 10, wherein said optical transfer means is formed by self-focussing fibers.
References Cited (Backward Citations)
No citation records indexed.
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