WO1991017627A3 - Apparatus and method for grey level printing using a binary architectured printhead - Google Patents
Apparatus and method for grey level printing using a binary architectured printhead Download PDFInfo
- Publication number
- WO1991017627A3 WO1991017627A3 PCT/US1991/003089 US9103089W WO9117627A3 WO 1991017627 A3 WO1991017627 A3 WO 1991017627A3 US 9103089 W US9103089 W US 9103089W WO 9117627 A3 WO9117627 A3 WO 9117627A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pulses
- recording
- grey level
- strobe
- binary
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/40025—Circuits exciting or modulating particular heads for reproducing continuous tone value scales
- H04N1/40031—Circuits exciting or modulating particular heads for reproducing continuous tone value scales for a plurality of reproducing elements simultaneously
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head
- H04N1/4015—Compensating positionally unequal response of the pick-up or reproducing head of the reproducing head
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
- H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
- H04N1/4056—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern the pattern varying in one dimension only, e.g. dash length, pulse width modulation [PWM]
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
Abstract
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69114668T DE69114668T2 (en) | 1990-05-10 | 1991-05-06 | DEVICE AND METHOD FOR GRAY VALUE PRINTING USING A PRINT HEAD WITH BINARY ARCHITECTURE. |
EP91909353A EP0483321B1 (en) | 1990-05-10 | 1991-05-06 | Apparatus and method for grey level printing using a binary architectured printhead |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/521,511 US5138337A (en) | 1990-05-10 | 1990-05-10 | Apparatus for grey level printing using a binary architectured printhead |
US521,511 | 1990-05-10 | ||
US07/609,868 US5255013A (en) | 1990-11-07 | 1990-11-07 | Multiple address grey level LED printing with binary architectured printhead |
US609,868 | 1990-11-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1991017627A2 WO1991017627A2 (en) | 1991-11-14 |
WO1991017627A3 true WO1991017627A3 (en) | 1992-04-02 |
Family
ID=27060492
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1991/003089 WO1991017627A2 (en) | 1990-05-10 | 1991-05-06 | Apparatus and method for grey level printing using a binary architectured printhead |
Country Status (4)
Country | Link |
---|---|
EP (2) | EP0671844B1 (en) |
JP (1) | JPH05500146A (en) |
DE (2) | DE69131655T2 (en) |
WO (1) | WO1991017627A2 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5546513A (en) * | 1993-09-20 | 1996-08-13 | Eastman Kodak Company | Data transmission system for sparse array print head |
EP0663759A1 (en) * | 1994-01-14 | 1995-07-19 | Xerox Corporation | Digital LED printer with multiple print imaging modes |
JPH07223337A (en) * | 1994-01-14 | 1995-08-22 | Xerox Corp | Method of correcting optical conversion efficiency of led picture element in digital printer and led print bar |
US5699168A (en) * | 1995-06-22 | 1997-12-16 | Texas Instruments Incorporated | Grayscale printing with sliding window memory |
JPH10173918A (en) * | 1996-12-16 | 1998-06-26 | Alps Electric Co Ltd | Shading correcting method of image read means, and image processor |
GB2316259B (en) * | 1996-08-12 | 2000-09-06 | Alps Electric Co Ltd | Image sensing apparatus and shading correction method |
DE69620204T2 (en) * | 1996-12-23 | 2002-10-24 | Agfa-Gevaert, Mortsel | Printers and printing processes |
US7602411B2 (en) * | 2003-06-12 | 2009-10-13 | Oki Data Corporation | Image forming apparatus |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4074319A (en) * | 1976-12-13 | 1978-02-14 | Bell Telephone Laboratories, Incorporated | Light emitting diode array imaging system - parallel approach |
US4525729A (en) * | 1983-04-04 | 1985-06-25 | Polaroid Corporation | Parallel LED exposure control system |
WO1988010042A1 (en) * | 1987-06-03 | 1988-12-15 | Eastman Kodak Company | Energizing heating elements of a thermal printer |
US4855760A (en) * | 1987-03-12 | 1989-08-08 | Fuji Photo Film Co., Ltd. | LED array with graduated quantity control |
EP0375431A2 (en) * | 1988-12-22 | 1990-06-27 | Xerox Corporation | Bandwidth reduced multi-pass writing of variable gray level digital images |
-
1991
- 1991-05-06 DE DE1991631655 patent/DE69131655T2/en not_active Expired - Fee Related
- 1991-05-06 EP EP95106953A patent/EP0671844B1/en not_active Expired - Lifetime
- 1991-05-06 DE DE69114668T patent/DE69114668T2/en not_active Expired - Fee Related
- 1991-05-06 WO PCT/US1991/003089 patent/WO1991017627A2/en active IP Right Grant
- 1991-05-06 JP JP50902891A patent/JPH05500146A/en active Pending
- 1991-05-06 EP EP91909353A patent/EP0483321B1/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4074319A (en) * | 1976-12-13 | 1978-02-14 | Bell Telephone Laboratories, Incorporated | Light emitting diode array imaging system - parallel approach |
US4525729A (en) * | 1983-04-04 | 1985-06-25 | Polaroid Corporation | Parallel LED exposure control system |
US4855760A (en) * | 1987-03-12 | 1989-08-08 | Fuji Photo Film Co., Ltd. | LED array with graduated quantity control |
WO1988010042A1 (en) * | 1987-06-03 | 1988-12-15 | Eastman Kodak Company | Energizing heating elements of a thermal printer |
EP0375431A2 (en) * | 1988-12-22 | 1990-06-27 | Xerox Corporation | Bandwidth reduced multi-pass writing of variable gray level digital images |
Non-Patent Citations (1)
Title |
---|
Journal of Imaging Technology, volume 12, no. 5, October 1986 (Springfield, US) I. Abiko et al.: "High printing quality LED printheads", pages 296-299, see section III; figures 1,3 * |
Also Published As
Publication number | Publication date |
---|---|
EP0671844B1 (en) | 1999-09-22 |
WO1991017627A2 (en) | 1991-11-14 |
EP0671844A1 (en) | 1995-09-13 |
EP0483321B1 (en) | 1995-11-15 |
DE69114668T2 (en) | 1996-09-19 |
EP0483321A1 (en) | 1992-05-06 |
JPH05500146A (en) | 1993-01-14 |
DE69114668D1 (en) | 1995-12-21 |
DE69131655T2 (en) | 2000-03-02 |
DE69131655D1 (en) | 1999-10-28 |
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