KR930003305B1 - Iris controlling circuit - Google Patents

Iris controlling circuit

Info

Publication number
KR930003305B1
KR930003305B1 KR910010323A KR910010323A KR930003305B1 KR 930003305 B1 KR930003305 B1 KR 930003305B1 KR 910010323 A KR910010323 A KR 910010323A KR 910010323 A KR910010323 A KR 910010323A KR 930003305 B1 KR930003305 B1 KR 930003305B1
Authority
KR
Grant status
Grant
Patent type
Prior art keywords
iris
signal
window pulse
controlling circuit
generator
Prior art date
Application number
KR910010323A
Other versions
KR930000999A (en )
Inventor
Jong-Pil Lee
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/222Studio circuitry; Studio devices; Studio equipment ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, TV cameras, video cameras, camcorders, webcams, camera modules for embedding in other devices, e.g. mobile phones, computers or vehicles
    • H04N5/225Television cameras ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, video cameras, camcorders, webcams, camera modules for embedding in other devices, e.g. mobile phones, computers or vehicles
    • H04N5/235Circuitry or methods for compensating for variation in the brightness of the object, e.g. based on electric image signals provided by an electronic image sensor
    • H04N5/2351Circuitry for evaluating the brightness variations of the object

Abstract

The circuit for automatically adjusting the aperture of an iris in response to video signals obtained from a charge coupled device (1) to optimise the brightness of targetted object comprises an iris driving signal generator (10), an iris adjuster (30) for controlling a motor (M), a window pulse generator (20) for dividing a picture of a video signal into several areas to generate window pulse signals and a signal selector (13) for receiving the window pulse signal to select the corresponding video signal.
KR910010323A 1991-06-19 1991-06-19 Iris controlling circuit KR930003305B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR910010323A KR930003305B1 (en) 1991-06-19 1991-06-19 Iris controlling circuit

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR910010323A KR930003305B1 (en) 1991-06-19 1991-06-19 Iris controlling circuit
GB9206650A GB9206650D0 (en) 1991-06-19 1992-03-26 Automatic iris adjusting apparatus
JP8848192A JPH05167917A (en) 1991-06-19 1992-04-09 Automatic diaphragm controller
DE19924212515 DE4212515A1 (en) 1991-06-19 1992-04-14 Automatic iris diaphragm adjusting

Publications (2)

Publication Number Publication Date
KR930000999A true KR930000999A (en) 1993-01-16
KR930003305B1 true KR930003305B1 (en) 1993-04-24

Family

ID=19316099

Family Applications (1)

Application Number Title Priority Date Filing Date
KR910010323A KR930003305B1 (en) 1991-06-19 1991-06-19 Iris controlling circuit

Country Status (4)

Country Link
JP (1) JPH05167917A (en)
KR (1) KR930003305B1 (en)
DE (1) DE4212515A1 (en)
GB (1) GB9206650D0 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0142290B1 (en) * 1993-11-24 1998-06-15 김광호 Image improving method and its circuits
WO2003019285A1 (en) * 2001-08-22 2003-03-06 Cardax International Ltd Camera metering and exposure control system
DE102004047476B4 (en) * 2004-09-30 2014-05-08 Robert Bosch Gmbh Device and method for adjusting a camera

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3555181A (en) * 1968-06-05 1971-01-12 Bell Telephone Labor Inc Automatic video level control employing iris and amplifier gain adjustments
JPH0254487B2 (en) * 1980-02-27 1990-11-21 Canon Kk
JPS5741079A (en) * 1980-08-26 1982-03-06 Asahi Optical Co Ltd Automatic television camera exposure device by division of picture
JPS5783971A (en) * 1980-11-13 1982-05-26 Asahi Optical Co Ltd Spot exposure control circuit
GB2219461B (en) * 1988-05-02 1992-11-18 Canon Kk Exposure control device
KR910008286Y1 (en) * 1988-07-12 1991-10-15 강진구 Auto-exposure control circuit of video camera
US5049997A (en) * 1989-04-10 1991-09-17 Fuji Photo Film Co., Ltd. Video camera exposure control method and apparatus for preventing improper exposure due to changing object size or displacement and luminance difference between the object and background
JPH02274073A (en) * 1989-04-14 1990-11-08 Fuji Photo Film Co Ltd Exposure control method

Also Published As

Publication number Publication date Type
JPH05167917A (en) 1993-07-02 application
GB9206650D0 (en) 1992-05-06 grant
DE4212515A1 (en) 1992-12-24 application
GB2256990A (en) 1992-12-23 application

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Legal Events

Date Code Title Description
A201 Request for examination
G160 Decision to publish patent application
E701 Decision to grant or registration
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20030328

Year of fee payment: 11

LAPS Lapse due to unpaid annual fee