JPH049927U

JPH049927U -

Info

Publication number: JPH049927U
Application number: JP5025790U
Authority: JP
Priority date: 1990-05-16
Filing date: 1990-05-16
Publication date: 1992-01-28

Description

[Brief explanation of the drawing]

第１図ａ〜ｃは本考案のシヤツタ制御装置の第
１実施例の動作を説明するための要部の構成図、
第２図は第１実施例の制御系のブロツク図、第３
図は第１実施例のフローチヤート、第４図は第１
実施例における露光と時間との関係を示す説明図
、第５図は第１実施例のタイミングチヤート、第
６図は本考案の第２実施例のフローチヤート、第
７図はシヤツタ制御装置の構成図、第８図ａ〜ｄ
は従来のシヤツタ制御装置の動作を説明するため
の要部の構成図、第９図は従来のシヤツタ制御装
置における露光と時間との関係を示す説明図、第
１０図は第９図のシヤツタ制御装置のタイミング
チヤートである。１，２……シヤツタ羽根、５……フオトセンサ
、６……ステツピングモータ、７，８，９，１０
，１１……駆動機構、１４……制御手段、１５，
１６……カウンタ、１７……測光手段。 1a to 1c are configuration diagrams of main parts for explaining the operation of the first embodiment of the shutter control device of the present invention,
Figure 2 is a block diagram of the control system of the first embodiment;
The figure is a flowchart of the first embodiment, and Figure 4 is the flowchart of the first embodiment.
An explanatory diagram showing the relationship between exposure and time in the embodiment, FIG. 5 is a timing chart of the first embodiment, FIG. 6 is a flowchart of the second embodiment of the present invention, and FIG. 7 is the configuration of the shutter control device. Figures 8a-d
1 is a block diagram of main parts to explain the operation of a conventional shutter control device, FIG. 9 is an explanatory diagram showing the relationship between exposure and time in a conventional shutter control device, and FIG. 10 is a diagram showing the shutter control of FIG. 9. This is a timing chart of the device. 1, 2... Shutter blade, 5... Photo sensor, 6... Stepping motor, 7, 8, 9, 10
, 11... Drive mechanism, 14... Control means, 15,
16...Counter, 17...Photometering means.

Claims

[Claims for Utility Model Registration] (1) In a shutter control device comprising a plurality of shutter blades and a drive mechanism that opens and closes the shutter blades in response to driving force of a stepping motor, the stepping motor operates. 1. A shutter control device comprising: a counter that adds up the time from when the shutter blade starts opening until the shutter blade opens; and a control means that changes a drive pulse rate to the stepping motor during the time. (2) In a shutter control device comprising a plurality of shutter blades and a drive mechanism that opens and closes the shutter blades in response to driving force from a stepping motor, the shutter blade opens after the stepping motor starts operating. A shutter control comprising: a counter that adds up the number of driving pulses applied to the stepping motor up to the point in time; and a control means that changes the rate of driving pulses applied to the stepping motor until the number of driving pulses is reached. Device.