Image reading apparatus
US8320029B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 2010 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Jun 17, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4097
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
When an original conveying unit that rotates about a rotation center 901 reaches an opening angle 906, an image is read using a line sensor, and a detected object is determined as being white dust on a platen glass. When it further reaches an opening angle 908, an image is again read using the line sensor, and a detected object is determined as being black dust on the platen glass. When it further reaches an opening angle 910, an image is again read using the line sensor, and a detected object is determined as being dust on a reference white plate with which the original conveying unit is provided in a state of facing a reading position where the line sensor performs reading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.