Image forming apparatus and method for correction image density non-uniformity by reading a test pattern recorded by the apparatus
US5189521A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1991 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Jun 6, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4015
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is disclosed an image forming apparatus for recording an original image read by a reading unit on a recording medium uses a recording head having an array of a plurality of recording elements. The apparatus includes pattern forming unit for forming, on the recording medium, a test pattern having an area larger than an array range of the plurality of recording elements using the recording head in accordance with a predetermined operation, a detection unit for causing the reading unit to read the test pattern formed on the recording medium by the pattern forming unit in accordance with a predetermined operation, and detecting a density distribution within the array range of the plurality of recording elements, a generation unit for generating correction data of a drive condition for uniforming a density during image formation on the basis of the density distribution detected by the detection unit in correspondence with the plurality of recording elements, and a guide unit for display the predetermined operations on a display unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.