KR930018967A - Automatic brightness control circuit of backlight of color liquid crystal viewfinder - Google Patents

Automatic brightness control circuit of backlight of color liquid crystal viewfinder Download PDF

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Publication number
KR930018967A
KR930018967A KR1019920003388A KR920003388A KR930018967A KR 930018967 A KR930018967 A KR 930018967A KR 1019920003388 A KR1019920003388 A KR 1019920003388A KR 920003388 A KR920003388 A KR 920003388A KR 930018967 A KR930018967 A KR 930018967A
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KR
South Korea
Prior art keywords
liquid crystal
color liquid
crystal device
control circuit
signal
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Application number
KR1019920003388A
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Korean (ko)
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KR950006043B1 (en
Inventor
김형권
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강진구
삼성전자 주식회사
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Priority to KR1019920003388A priority Critical patent/KR950006043B1/en
Publication of KR930018967A publication Critical patent/KR930018967A/en
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Publication of KR950006043B1 publication Critical patent/KR950006043B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/71—Circuitry for evaluating the brightness variation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/82—Camera processing pipelines; Components thereof for controlling camera response irrespective of the scene brightness, e.g. gamma correction
    • H04N23/83—Camera processing pipelines; Components thereof for controlling camera response irrespective of the scene brightness, e.g. gamma correction specially adapted for colour signals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Studio Devices (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

이 발명에 의한 캠코더 뷰파인더내의 백라이트 조절회로는 고체 촬상소자와 칼라이중 샘프링 회로 및 A/D변환기를 포함하는 신호 입력부와, 그 신호 입력부로부터 수신등 휘도 영상신호를 감마보정함과 동시에 64영역으로 분할하여 제어를 위한 평가치를 산출하는 디지탈 카메라 프로세싱부와, 수신 평가치를 비교하여 제어신호를 보내는 마이콤과, 마이콤의 제어신호에 의해 밝기가 자동으로 조절되는 칼라 액정 뷰파인더부로 이루어져서 외부의 촬영조건의 변화에도 능동적으로 대처할 수 있는 띄어난 효과를 가진다.The backlight control circuit in the camcorder viewfinder according to the present invention comprises a signal input section including a solid-state image pickup device, a color double sampling circuit, and an A / D converter, and gamma-correction of luminance image signals of a reception light from the signal input section. Digital camera processing unit for calculating the evaluation value for the control by dividing the control unit, a microcomputer to send a control signal by comparing the received evaluation value, and a color liquid crystal viewfinder unit which automatically adjusts the brightness according to the control signal of the microcomputer. It has a remarkable effect that can actively cope with the change of.

Description

칼라액정소자 뷰파인더의 백 라이트의 자동 밝기 조절회로Automatic brightness control circuit of backlight of color liquid crystal viewfinder

제1도는 이 발명에 의한 전체적인 구성을 개략적으로 나타낸 블럭도.1 is a block diagram schematically showing the overall configuration according to the present invention.

제2도는 (a)는 제1도에 나타나 있는 분할 검출부에서 행해지는 평가치를 산툴하는 1주기의 필드를 나타낸 도면. (b)는 제1도에 나타나 있는 1주기중 AE필드의 평가치를 산출하는 검출부를 분할한 영역을 나타낸 도면.FIG. 2 is a diagram showing a field of one cycle for evaluating evaluation values performed by the division detection unit shown in FIG. (b) shows the area | region which divided | segmented the detection part which computes the evaluation value of an AE field in one period shown in FIG.

제3도는 이 발명의 일실시예를 나타낸 도면.3 is a view showing an embodiment of the present invention.

제4도는 제3도에 나타나 있는 DCP(Digital Camera Processing)의 동작을 설명한 도면.4 is a view for explaining the operation of the digital camera processing (DCP) shown in FIG.

제5도는 마이콤과 백 라이트 조절용 EVR과의 제어동작을 개략적으로 나타낸 도면.5 is a view schematically showing a control operation of the microcomputer and the EVR for backlight adjustment.

제6도는 마이콤의 적정 밝기를 산출해내는 제어과정을 나타낸 플로우 챠트이다.6 is a flow chart showing a control process for calculating the appropriate brightness of the microcomputer.

본 내용은 용부 공개 건이므로 전문 내용을 수록하지 않았음This content is a public disclosure, so no full text was included.

Claims (8)

렌즈를 통하여 수신된 광학적 신호를 전기적 영상신호로 변환하는 고체촬상소자(CCD)통하여 수신된 후, 이중 샘플링을 행하는 칼라이중 샘플링회로(CDS)거치고, 아날로그 신호를 디지탈 신호로 변환하는 A/D변환기로 입력되도록 구성된 신호 입력부(1)와; 상기 신호 입력부(1)로 부터 수신된 휘도신호를 감마보정부에서 감마보정되고, 영역분할 검출부에서 소정의 갯수로 분할하여 제어를 위한 평가치를 산출하는 디지탈 카메라 프로세싱부(2)와; 상기 디지탈 프로세싱부(2)로부터 수신된 산출 평가치에 의하여 조절되는 마이콤으로된 콘트롤러(3)와; 상기 마이콤 코트롤러(3)의 제어신호를 받아 밝기가 자동으로 조절되는 칼라액정소자 뷰파인더부(4)로 이루어진 것을 특징으로 하는 칼라 액정소자 뷰파인더의 백 라이트 자동 밝기 조절회로.A / D converter which converts an analog signal into a digital signal after receiving it through a solid-state imaging device (CCD) that converts an optical signal received through a lens into an electrical image signal, and then performing a double sampling, a color double sampling circuit (CDS). A signal input unit (1) configured to be input as; A digital camera processing section (2) for gamma correcting the luminance signal received from the signal input section (1) and dividing the luminance signal by a predetermined number in a region division detecting section to calculate an evaluation value for control; A microcomputer controller 3 controlled by the calculated evaluation value received from the digital processing unit 2; Backlight automatic brightness control circuit of the color liquid crystal device viewfinder, characterized in that made of a color liquid crystal device viewfinder unit 4, the brightness is automatically adjusted in response to the control signal of the microcomputer coat roller (3). 제1항에 있어서,상기 칼라이중 샘플링회로는 9.54M㎐펄스에 의해 샘플링되는 것으로 이루어진 것을 특징으로 하는 칼래액정소자 뷰파인더의 백라이트 자동 밝기 조절회로.The backlight automatic brightness control circuit of claim 1, wherein the color double sampling circuit is sampled by 9.54 M㎐ pulses. 제1항에 있어서, 상기 A/D변환기는 감마보정회로 후단에 위치할 수도 있는 것을 특징으로 하는 칼라액정소자 뷰파인더의 백 라이트 자동 밝기 조절회로.The backlight automatic brightness control circuit of claim 1, wherein the A / D converter may be positioned after the gamma correction circuit. 제1항에 있어서, 상기 감마보정회로는 10비트 디지탈 신호를 수신하여 8비트 디지탈 신호를 출력하는 디지탈 감마보정회로인 것을 특징으로 하는 칼라 액정소자 뷰파인더의 백 라이트 자동 밝기 조절회로.The backlight automatic brightness control circuit of a color liquid crystal device viewfinder according to claim 1, wherein the gamma correction circuit is a digital gamma correction circuit that receives a 10-bit digital signal and outputs an 8-bit digital signal. 제1항에 있어서, 상기 디지탈 카메라 프로세싱부(2)는 디지탈 클램프회로(14)를 추가로 구비한 것을 특징으로 하는 칼라액정소자 뷰파인더의 백 라이트 자동 밝기 조절회로.2. The backlight automatic brightness control circuit of the color liquid crystal device viewfinder according to claim 1, wherein the digital camera processing unit (2) further comprises a digital clamp circuit (14). 제1항에 있어서, 상기 영역분할 검출부는 레벨별로 64분할 하는 것으로 이루어진 것을 특징으로 하는 칼라액정소자 뷰파인더의 백 라이트 자동 밝기 조절회로.The backlight automatic brightness control circuit of the color liquid crystal device viewfinder according to claim 1, wherein the area division detection unit divides the level by 64. 제1항에 있어서, 상기 마이콤 콘트롤러는 상기 분할 검출부(16)로부터 8bit의 데이타를 수신하여 이미 프로그램된 데이타값과 기존 백 라이트 밝기 값 및 구송모터에 의해 조절되는 아이리스(IRIS) 양을 이용하여 적정 밝기를 위한 제어전압의 평가치를 산출해내는 것임을 특징으로 하는 칼라 액정소자 뷰파인더의 백 라이트 자동 밝기 조절회로.The microcomputer controller of claim 1, wherein the microcomputer controller receives 8 bits of data from the segment detection unit 16, and titrates the data using an already programmed data value, an existing backlight brightness value, and an IRIS amount controlled by the old motor. A backlight automatic brightness control circuit of a color liquid crystal device viewfinder, characterized by calculating an evaluation value of a control voltage for brightness. 제1항에 있어서, 상기 칼라 액정소자 뷰파인더는 상기 마이콤(3)의 제어신호 수신하여 액정소자 백-라이트(21)의 밝기 조절을 위한 제어전압으로 변환시키는 백0라이트 전압 제어부(EVR)로 이루어진 것을 특징으로 하는 칼라 액정소자 뷰파인더의 백-라이트 자동 밝기 조절회로.The display device of claim 1, wherein the color liquid crystal device viewfinder receives a control signal of the microcomputer 3 and converts the color liquid crystal device into a control voltage for controlling brightness of the liquid crystal device back light 21. Back-light automatic brightness control circuit of the color liquid crystal device viewfinder, characterized in that made. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920003388A 1992-02-29 1992-02-29 Automatically controlling circuit of back light brightness in a color lcd element view finder KR950006043B1 (en)

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Application Number Priority Date Filing Date Title
KR1019920003388A KR950006043B1 (en) 1992-02-29 1992-02-29 Automatically controlling circuit of back light brightness in a color lcd element view finder

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Application Number Priority Date Filing Date Title
KR1019920003388A KR950006043B1 (en) 1992-02-29 1992-02-29 Automatically controlling circuit of back light brightness in a color lcd element view finder

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KR930018967A true KR930018967A (en) 1993-09-22
KR950006043B1 KR950006043B1 (en) 1995-06-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442948B1 (en) * 2002-03-08 2004-08-04 엘지전자 주식회사 A back lighting apparatus of Liquid Crystal Display in a mobile phone and back lighting method
US9210330B2 (en) 2012-08-21 2015-12-08 Samsung Electronics Co., Ltd. Image sensor and electronic device including the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442948B1 (en) * 2002-03-08 2004-08-04 엘지전자 주식회사 A back lighting apparatus of Liquid Crystal Display in a mobile phone and back lighting method
US9210330B2 (en) 2012-08-21 2015-12-08 Samsung Electronics Co., Ltd. Image sensor and electronic device including the same

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KR950006043B1 (en) 1995-06-07

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