The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 1989
Filed:
Oct. 17, 1988
Peter P Carcia, Reading, MA (US);
Judith N Coltman, Reading, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
An exposure control system in a self-developing camera having a user trim adjustment for manually varying the exposure time of a picture over a limited range of exposure times is provided with a photocell for measuring the level of ambient light in a scene to be photographed and a memory for temporarily storing this scene light information. If after taking a picture of a particular scene the camera operator determines that the resulting photograph was either too light or too dark and chooses to take another picture of the particular scene, the trim control is manually adjusted to obtain the desired picture brightness level. In the present arrangement, when the particular scene is re-framed and the trim control is adjusted, the ambient scene light information stored in memory is varied, and not the ambient scene light subsequently sensed by the photocell in order to compensate for the fact that upon re-framing the scene the photocell sees a different portion of the same scene and therefore a different ambient scene light level and that the intent of the operator in such instances is to alter the exposure time relating to the initial scene that produced the unwanted scene light conditions and not that relating to the re-framed scene.