Home | Links | Contact Us | More About Intellectual Property | Bookmark

Search patents:

Home

Processing Data

Viewfinder-brightness-control-circuit-for-a-camcorder-employing-iris-output-voltage-and-method-therefor

Communication link with isochronous and asynchronous priority modes coupling bridge circuits in a computer system

Accordingly, the invention provides a computer architecture that includes a new interconnect bus ...

Color separation apparatus

An object of the present invention is to provide a color separation circuit arrangement that ...

Detachable unit electronic camera

It is a first object of the invention to divide an electronic camera into three detachable units ...

Image information processing techniques for improving the resolution of scanned imaging systems

Surprisingly the applicant has been able to achieve the foregoing objects and others by using an ...

Data recording device

To attain the above object, this invention provides a data recording device comprising a frame ...

Adjustable adapter for borescope and film/video camera

In accordance with the invention, an adapter is provided for quick and easy coupling of an optical ...

Method of de-bugging host-processor software in a distributed processing system having a host processor and at least one object oriented processor

It is therefore an object of the invention to provide methods and apparatus for distributing ...

Motion vector detecting apparatus and image stabilizer including the same

Accordingly, an essential object of the present invention is to provide, with a view to eliminating ...

Image processing device and method for sensing moving objects and rangefinder employing the same

In consideration of the above, it is an object of the present invention to provide an image ...

Method for compensating the vibration of an image and device therefor in a video camera

It is therefore an object of the invention to provide a method and a device which can remove a ...

Viewfinder brightness control circuit for a camcorder employing iris output voltage and method therefor

Details

Inventors: Kim, No-jin;
Assignee: Samsung Electronics Co., Ltd. (Kyungki-Do, KR)
Primary Examiner: Greening; Wendy
Assistant Examiner: Ho; Tuan V.
Attorney, Agent or Firm: Sughrue, Mion, Zinn, Macpeak & Seas

A camcorder viewfinder brightness control circuit includes a first amplifier for amplifying a video signal corresponding to an object to a predetermined level, a second amplifier for detecting a change in an iris output voltage which varies in response to variations in ambient brightness and amplifying the iris output voltage by a predetermined ratio, and a light controller for automatically controlling the brightness of an image supplied to the viewfinder responsive to the change in ambient brightness. Preferably, the light controller adds the signal representing change in the iris output voltage output by the second amplifier to the video signal output from the first amplifier. A method for controlling a camcorder viewfinder brightness control circuit is also described.

DETAILED DESCRIPTION The principal object of the present invention is to provide a viewfinder brightness control circuit for automatically controlling viewfinder brightness by applying an iris output voltage indicative of ambient brightness to a video signal output by a camcorder.
This and other objects, features and advantages according to the present invention are provided by a camcorder viewfinder brightness control circuit.
The circuit advantageously includes a first amplifier for amplifying a video signal representing an object to a predetermined level, a second amplifier for detecting the change in an iris output voltage, Which voltage varies depending on ambient brightness, so as to amplify the iris output voltage to a predetermined level, and a light controller for automatically controlling the brightness of the viewfinder according to the ambient brightness by combining the output signals of the first and second amplifiers with one another.
According to one aspect of the invention, the signal applied to the viewfinder is formed by adding a differential voltage representative of a change in the iris output voltage output from the second amplifier to the amplified video signal output from the first amplifier.

Related patents

	Data communicating device It is, therefore, an object of the invention to provide an improved data communicating device in which the corruption of data is prevented when the IC memory card is ...
	Solid-sate camera with solid-state memory for holding characteristic code representing characteristic of an internal circuit It is an object of the present invention to solve the above problems. More specifically, it is an object of the present invention to provide a solid-state camera capable ...
	Camera control system with restrain based on the number of clients having access OF THE INVENTION Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings. (First Embodiment) In accordance with a ...
	Digital camera with time bracketing feature OF THE PREFERRED EMBODIMENT A block diagram of the present invention is shown in FIG. 1. Image capture is performed by image sensor 12 which may be any type of ...
	Power supplying apparatus for a connecting apparatus and a video tape recorder having a built-in camera Therefore, it is an object of the present invention to provide an improved connecting apparatus in which the aforesaid shortcomings and disadvantages encountered with ...
	Electronic video recording device having a monitor screen on the rear face and a rotary video recording camera attached to the main body The present invention offers an electronic video recording device which enables the securing of a sufficient distance between the optical system of the video recording ...
	SLR digital still camera The primary object of the present invention is to provide an apparatus for preventing internal reflection by the quick return mirror upon photographing in an SLR digital ...
	Apparatus using serial data line to turn on a transceiver or other device We claim: 1. An apparatus for conserving power in an electrical device, said apparatus comprising: a power supply switching circuit for providing a connection between a ...
	System for wake-up module on PC card detecting switches had actuated and causing image to display to appear that was displayed when turned off What is claimed is: 1. A pc card comprising: a display; a memory storing images and a directory for identifying said images; an interface for transferring said images ...
	Electronic still camera that can be directly inserted in an external device In consideration of the foregoing, an object of the present invention is to provide an electronic still camera which can be manufactured in a compact, light-weight, thin ...

0.014
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved