Color detecting sensor and method for ink ribbon
US6594014B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2001 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Apr 20, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/501
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A color detecting sensor includes a light emitting element for emitting red light, a light emitting element for emitting green light, a light emitting element for emitting blue light, a light receiving element for receiving light emitted from each of the light emitting elements through an ink ribbon, and detecting device for detecting a color of the ink ribbon forming at least a colorless and transparent portion and the colorless and transparent portion based on an output signal of the light receiving element, the detecting device including a storage section for storing, as color reference data, the output signal of the light receiving element when the light emitting elements emit light through the colorless and transparent portion of the ink ribbon respectively, and a color deciding section for comparing, with the color reference data, the output signal of the light receiving element when the light emitting elements emit light through the color formed on the ink ribbon respectively, thereby deciding the color of the ink ribbon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.