JPH0285423U

JPH0285423U -

Info

Publication number: JPH0285423U
Application number: JP16494488U
Authority: JP
Priority date: 1988-12-20
Filing date: 1988-12-20
Publication date: 1990-07-04

Description

[Brief explanation of drawings]

第１図は本考案の１実施例に係るプログラムシ
ヤツタの平面図、第２図は本考案の１実施例の回
路図、第３図は第２図に示す回路のタイムチヤー
ト、第４図は本考案の他の実施例の回路図、第５
図は第４図に示す回路のタイムチヤート。２，３……シヤツタ羽根、６……モータ、７…
…フオトインタラプタ、７ａ……発光ダイオード
、７ｂ……フオトトランジスタ、１５……発振器
、１６……カウンタ、１８……マルチプレクサ、
２６……測光回路、２６ａ……受光部、２６ｂ…
…キヤパシタ、３３……デジタルコンパレータ、
４０〜４３……定電流源、ＡＰ……露出アパーチ
ユア、Ｐ１〜Ｐｎ……発振器。 Fig. 1 is a plan view of a program shutter according to an embodiment of the present invention, Fig. 2 is a circuit diagram of an embodiment of the present invention, Fig. 3 is a time chart of the circuit shown in Fig. 2, and Fig. 4 is a plan view of a program shutter according to an embodiment of the present invention. is a circuit diagram of another embodiment of the present invention, No. 5
The figure is a time chart of the circuit shown in Figure 4. 2, 3...Shutter blade, 6...Motor, 7...
...Photo interrupter, 7a... Light emitting diode, 7b... Photo transistor, 15... Oscillator, 16... Counter, 18... Multiplexer,
26...Photometering circuit, 26a...Light receiving section, 26b...
...Capacitor, 33...Digital comparator,
40-43... constant current source, AP... exposed aperture, P1-Pn... oscillator.

Claims

[Claims for Utility Model Registration] (1) Driven by a motor and capable of reciprocating movement within a predetermined travel area that includes the effective opening area;
During the forward movement, the opening area of the exposure aperture is continuously increased over time within the effective opening area, and during the backward movement, the opening area of the exposure aperture within the effective opening area is continuously decreased over time. The shutter blade has a shutter blade that has been adjusted to the desired angle, and a light-receiving section through which copying field light enters, and an exposure end signal is issued at the timing when the integrated value of the photocurrent flowing in response to the field light incident on the light-receiving section reaches a predetermined value. a field light integrating means for generating a field light integrating means, and configured to move the shutter blade backward in response to the exposure end signal generated by the field light integrating means, comprising a blade speed detection means for detecting a traveling speed within a traveling area before reaching the effective opening area during forward movement of the blade, and a blade speed detecting means for detecting a traveling speed within the traveling area before reaching the effective opening area when the blade is traveling forward, and the traveling speed before reaching the effective opening area detected by the blade speed detecting means. A shutter control device characterized in that the driving power of the motor within the effective opening area during forward movement is controlled in accordance with the traveling speed within the area. (2) Utility model registration The shutter control device according to claim 1, further comprising a pulse drive means for supplying a pulsed drive current to the motor, and the effective opening detected by the blade speed detection means. A shutter control device characterized in that the duty of the pulsed drive current within the effective aperture area during forward movement is controlled in accordance with the traveling speed within the travel area before reaching the area. (3) Utility Model Registration The shutter control device according to claim 1, further comprising current adding means for supplying a drive current to the motor, the blade speed reaching the effective opening area detected by the blade speed detecting means. A shutter control device characterized in that a current value of a drive current within an effective opening area during reciprocating is controlled in accordance with a traveling speed within a previous traveling area.