Dalsa Corporation

Harald Siefken

Charles Russell Smith

Felicia Yan Shu

Lucian Ion

A viewfinder system for a digital camera comprises a main optical path for projecting an outside scene image onto a light sensitive area facility, which facility determines a user field, and an optical extraction path for through mirror-operation extracting a fraction of the outside scene image onto a viewer optical path. The viewer optical path comprises a first mask for inserting a negative delineating outline into a viewer field and a second mask for inserting a positive delineating outline into the viewer field, both said first and second masks corresponding to the user field. In particular, at least one of the first and second masks is realized by an electronic device that has its mask size variably controlled by an electronic facility on the basis of pixel-wise driving. Advantageously, the electronic device is controlled by a sensor facility that is adapted for with respect to the other of the masks that has a fixed size sensing the latter size.

Viewfinder system for a digital camera and digital camera provided with such a system

An encoder includes a linear offset amplifier, a linear analog to digital converter coupled to the linear offset amplifier, a switched offset amplifier, a switched analog to digital converter coupled to the switched offset amplifier, and a video controller. The video controller is coupled to both the linear and switched analog to digital converters. The video controller is configured to set both gains and offsets of the linear and switched analog to digital converters so that the gain and offset of the linear analog to digital converter is different than the gain and offset of the switched analog to digital converter.

Growing community of inventors

Kitchener, Canada

Harald Siefken