JPS60112231U

JPS60112231U - Flash circuit of flash device

Info

Publication number: JPS60112231U
Application number: JP20346883U
Authority: JP
Inventors: 賢二増山
Original assignee: 日本精密工業株式会社
Priority date: 1983-12-29
Filing date: 1983-12-29
Publication date: 1985-07-30

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図はカメラに適応する本考案に係わる閃光装置の閃
光回路、第２図は第１図の他の実施例を示す。図中、２・・・輝度検出回路、−Ｄ・・・受光素子、α
・・・検出電圧、β・・・基準電圧、Ｑ・・・比較回路
、Ｒ□〜Ｒ６・・・抵抗、３・・・保持回路、Ｔｒ１〜
Ｔｒ３・・・トランジスター、４・・・充電回路、Ｔ１
・・・発振昇圧トランス、ＣＯ・・・主コンデンサ−、
Ｃ□、Ｃ２・・・コンデンサー、Ｔ２・・・トランス、
Ｘ・・・Ｘ切片、Ｓ・・・閃光電球、Ｌ・・・レリーズ
、Ｅ・・・電源、ＳＷｏ・・・電源スィッチ、ＳＷｌ・
・・補助スイッチ。FIG. 1 shows a flash circuit of a flash device according to the present invention which is applied to a camera, and FIG. 2 shows another embodiment of the flash device shown in FIG. In the figure, 2... Brightness detection circuit, -D... Light receiving element, α
...Detection voltage, β...Reference voltage, Q...Comparison circuit, R□~R6...Resistor, 3...Holding circuit, Tr1~
Tr3...Transistor, 4...Charging circuit, T1
...Oscillating step-up transformer, CO...main capacitor,
C□, C2...capacitor, T2...transformer,
X...X intercept, S...flash bulb, L...release, E...power supply, SWo...power switch, SWl.
...Auxiliary switch.

Claims

[Scope of utility model registration request]

The flash device has a brightness detection circuit that outputs a charging signal according to the brightness of the subject, and the flash circuit of the flash device that receives and charges the charging signal from this brightness detection circuit does not receive the charging signal from the brightness detection circuit. A flash circuit for a flash device, characterized in that a holding circuit for holding a charged state is provided, and the holding circuit sustains charging.