JPS6251323U

JPS6251323U -

Info

Publication number: JPS6251323U
Application number: JP14405185U
Authority: JP
Priority date: 1985-09-19
Filing date: 1985-09-19
Publication date: 1987-03-30

Description

[Brief explanation of drawings]

第１図は本考案の実施態様の構成の一例を示す
ブロツク図、第２図および第３図は本考案の第１
実施例に係り、第２図は自動焦点調整式カメラの
回路図、第３図はタイムチヤート、第４図は第２
実施例に係る回路図、第５図は第１実施例、第２
実施例が有する問題点を指定するタイムチヤート
、第６図はその問題点を解決した第３実施例の回
路図、第７図は第３実施例のタイムチヤート、第
８図ないし第１０図は各々第１実施例ないし第３
実施例を変形した実施例の回路図、第１１図はコ
ンテイニユアスＡＦモードを有する従来例のフア
インダ視野の状態図、第１２図はワンシヨツトＡ
Ｆモードを有する従来例のフアインダ視野の状態
図、第１３図はその場合のフローチヤートである
。Ａ０１……自動焦点調整手段、Ａ０２……メモ
リ手段、Ａ１……コンテイニユアスＡＦモード指
令手段、Ａ２……レンズ駆動手段、Ａ３……合焦
検出手段、Ａ４……焦点調整停止手段、Ａ５……
スポツト測光手段、Ａ６……合焦検出記憶手段、
Ａ７……ＡＥロツク制御手段、Ａ８……ＡＥロツ
ク制御手段、Ａ９……露出制御手段、１……ＡＦ
センサ、２……アナログ処理・Ａ／Ｄ変換回路、
３……ＡＦセンサドライバ、４……ＡＦプロセツ
サ、５……モータドライバ、Ｍ……レンズ移動用
モータ、７……スポツト測光用受光素子、８……
平均測光用受光素子、９……サンプルホールド回
路、１０……マルチプレクサ、１１……Ａ／Ｄ変
換回路、１２……ＡＥプロセツサ、１４……露出
制御部、１５……ラツチ回路、Ｂ１……測光制御
回路、Ｂ２……測光制御回路、ＦＦ……フリツプ
フロツプ、Ｓｗ_１……ＡＦ・ＡＥスタートスイツ
チ、Ｓｗ_２……レリーズスイツチ、Ｓｗ_３……Ａ
Ｆモード選択スイツチ。 FIG. 1 is a block diagram showing an example of the configuration of an embodiment of the present invention, and FIGS. 2 and 3 are the first embodiment of the present invention.
Regarding the example, Fig. 2 is a circuit diagram of an automatic focusing camera, Fig. 3 is a time chart, and Fig. 4 is a circuit diagram of an automatic focusing camera.
The circuit diagram according to the embodiment, FIG. 5 shows the first embodiment and the second embodiment.
A time chart specifying the problems that the embodiment has, FIG. 6 is a circuit diagram of the third embodiment that solves the problems, FIG. 7 is a time chart of the third embodiment, and FIGS. 8 to 10 are Each of the first to third embodiments
A circuit diagram of an embodiment that is a modification of the embodiment, FIG. 11 is a state diagram of the viewfinder field of view of a conventional example with continuous AF mode, and FIG. 12 is a one-shot A.
FIG. 13, which is a state diagram of a conventional finder field of view having F mode, is a flowchart in that case. A01... Automatic focus adjustment means, A02... Memory means, A1... Continuous AF mode command means, A2... Lens drive means, A3... Focus detection means, A4... Focus adjustment stop means, A5... …
Spot photometry means, A6...Focus detection storage means,
A7...AE lock control means, A8...AE lock control means, A9...Exposure control means, 1...AF
Sensor, 2...Analog processing/A/D conversion circuit,
3... AF sensor driver, 4... AF processor, 5... Motor driver, M... Lens movement motor, 7... Light receiving element for spot photometry, 8...
Light receiving element for average photometry, 9... Sample hold circuit, 10... Multiplexer, 11... A/D conversion circuit, 12... AE processor, 14... Exposure control section, 15... Latch circuit, B1... Photometry Control circuit, B2...Photometering control circuit, FF...Flip-flop, _Sw1 ...AF/AE start switch, _Sw2 ...Release switch, _Sw3 ...A
F mode selection switch.

Claims

[Scope of Claim for Utility Model Registration] (1) Spot photometry means; automatic focus adjustment means that resumes automatic focus adjustment when out of focus even after reaching an in-focus state; and an output from the spot photometry means. It stores photometric data, and updates the stored photometric data when focus information of the automatic focus adjustment means is in focus;
When the focus information is out of focus after focusing, the memory means retains the photometric data stored in the previous focusing time, and the focus information is based on the photometric data stored in the memory means immediately before the start of exposure control. An automatic focus adjustment camera equipped with an exposure control means for controlling exposure. (2) The automatic focus adjustment means includes a continuous AF mode command means, and a lens drive that starts lens movement based on a detection signal of an out-of-focus state of the photographic lens and stops lens movement based on a stop signal. means, a focus detection means for outputting a focus detection signal when the lens reaches a focused state by the lens driving means, and outputting an out-of-focus detection signal at other times; focus adjustment stop means that outputs the stop signal when a focus detection signal is output from the focus detection means in the operating state of the AF mode command means, and the memory means includes: AF locking means for storing photometric data output from the means, holding the stored photometric data based on a lock command signal, and updating the photometric data based on a lock release signal; a focus detection storage means that stores the focus detection when the signal is output; and when the continuous AF mode command means is operating and the focus detection storage signal is input from the focus detection storage means. , AE lock control means that outputs the lock release signal when the focus detection signal is input, and outputs the lock command signal when the out-of-focus detection signal is input. No.
Automatic focus adjustment camera described in (1).