Illuminating device, image reading apparatus including the illuminating device, and image forming apparatus including the image reading apparatus
US9383500B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2015 |
| Grant date | Jul 5, 2016 |
| Priority date | — |
| Expiry date | Jun 25, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0434
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An illuminating device capable of stably illuminating an irradiated object such as a document while suppressing light loss with a simply structure is provided.An LED array and a reflective plate are disposed sandwiching a slit (St) through which light reflected by a document MS passes and a light-guiding member is disposed on the side of the LED array. The light-guiding member includes a direct emission unit disposed between an illumination range y centered on a document reading position and the LED array and an indirect emission unit disposed between the reflective plate and the LED array, a light incidence face of the direct emission unit and a light incidence face of the indirect emission unit are disposed at mutually different position around the LED array, and the LED array is disposed on a side of an interior angle formed by the light incidence faces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.