Light control circuit for camcorder
CA 2001674 C · Owner: Goldstar Co. Ltd. · Inventors: Choi, Yong Hun
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A light control circuit for a camcorder having a microcomputer and a light controlled for illuminating the scene to be filmed according to the scene brightness is disclosed. The circuit includes a record signal delay unit a light on/off control unit, an illuminance detection unit and a light control unit. The record signal delay unit retards the start of the recording with a predetermined delay time necessary for adjustment of the light brightness. The light on/off unit is responsive to a pause switch for turning the light off when the recording stops. The illumination detection unit measures the illuminance of the environment and adjusts the brightness of the light accordingly. The light …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 27, 1989 and granted December 13, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 27, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.