Printed circuit unit for a camera
US4297018A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1979 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | Jul 9, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K1/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A printed circuit unit for a camera, comprising PA0 a photo-sensing means to measure brightness of an object, PA0 an integrated exposure operation circuit means to conduct exposure operation based on the photo-sensing output from said photo-sensing means and other exposure factors for determining a proper exposure value, (an exposure time value or an exposure aperture value), PA0 an electro-optical display means to digitally display in an optical manner the exposure value (the exposure time value and/or the exposure aperture value) within a field of view finder of the camera, and PA0 a flexible printed circuit sheet having electrically conductive paths to electrically connect said photo-sensing means and said display means to said exposure operation circuit means, PA0 and in said printed circuit unit, said photo-sensing means, said display means and said integrated exposure operation circuit means are mounted on said flexible printed circuit sheet, and an opening is formed at a part of said printed circuit sheet to allow the image light beam from a photo-taking lens system to impinge on a film, PA0 and said printed circuit unit is so made that said photo-sensing means and said disp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.