JPS61179889U

JPS61179889U -

Info

Publication number: JPS61179889U
Application number: JP6285785U
Authority: JP
Priority date: 1985-04-26
Filing date: 1985-04-26
Publication date: 1986-11-10

Description

[Brief explanation of the drawing]

第１図は本考案における実施例のブロツク図、
。第２図は従来のビデオカメラのブロツク図。第
３図は第１図の各部の信号のタイミングチヤート
。第４図は断続回路と積分回路の回路図。第５図
はシステム制御回路の詳しいブロツク図。第６図
は第５図の各部の信号のタイミングチヤート。ｔ_１……異常光の入射するタイミング、ｔ_２…
…異常光の入射するタイミング、１５……ＮＯＴ
回路、１６……ＮチヤンネルＭＯＳトランジスタ
、１７……ＰチヤンネルＭＯＳトランジスタ、１
８……抵抗、１９……コンデンサー、２５……Ｓ
_１５信号を出力する信号発生器１、２６……Ｓ_１
６信号を出力する信号発生器２、２７……Ｓ_１７信号を出力する信号発生器３、２８……Ｓ_１８信
号を出力する信号発生器４、３２……ＮＯＴ回路
、３３……ＮＯＴ回路、３４……ＮＯＲ回路、３
５……ＯＲ回路、Ｓ_２３……Ｓ_１７の論理値の反
転した信号、Ｓ_２６……Ｓ_１３の論理値の反転し
た信号。 FIG. 1 is a block diagram of an embodiment of the present invention.
. Figure 2 is a block diagram of a conventional video camera. FIG. 3 is a timing chart of signals in each part of FIG. 1. Figure 4 is a circuit diagram of an intermittent circuit and an integrating circuit. FIG. 5 is a detailed block diagram of the system control circuit. FIG. 6 is a timing chart of signals of each part in FIG. 5. t ₁ ...timing of incidence of extraordinary light, t ₂ ...
...timing of incident of abnormal light, 15...NOT
Circuit, 16...N channel MOS transistor, 17...P channel MOS transistor, 1
8...Resistor, 19...Capacitor, 25...S
Signal generator 1, 26...S ₁ that outputs ₁₅ signals Signal generator 2, 27...S ₁₇ that outputs ₆ signals Signal generators 3, 28...S that output signals ₁₈ Signal generators 4, 32...NOT circuit, 33...NOT circuit, 34...NOR circuit, 3
5...OR circuit, _S23 ...signal with the logical value of _S17 inverted, _S26 ...signal with the logical value of _S13 inverted.

Claims

[Scope of utility model registration request]

At least an imaging unit that converts light into an electrical signal;
It is composed of an optical section that guides light to the imaging section, a color temperature detection section that detects the color temperature of the light of the subject and its surroundings, and a circuit section that processes the electrical signal, and the output signal of the color temperature detection section is at least The color temperature detection section repeats operation and rest at preset time intervals, and the color temperature detection section and the integration circuit The connection resistance of the video camera is such that it has a relatively low resistance when the color temperature detection section is in operation, and a relatively high resistance when the color temperature detection section is inactive. If the effective time of one operation of the color temperature detection section is _T1 , and the effective time of one pause is _T2 , then when the illuminance of the light incident on the imaging section is relatively low, When T ₁ /T ₂ becomes small and the illuminance of the light incident on the imaging section is relatively high, T
A video camera characterized in that the video camera is configured to have a large ratio of ₁ / _T2 .