JPS61135327U - - Google Patents
Info
- Publication number
- JPS61135327U JPS61135327U JP338386U JP338386U JPS61135327U JP S61135327 U JPS61135327 U JP S61135327U JP 338386 U JP338386 U JP 338386U JP 338386 U JP338386 U JP 338386U JP S61135327 U JPS61135327 U JP S61135327U
- Authority
- JP
- Japan
- Prior art keywords
- brightness detection
- circuit
- parallel
- reference resistance
- exposure control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 8
- 239000004065 semiconductor Substances 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims 1
Landscapes
- Exposure Control For Cameras (AREA)
- Indication In Cameras, And Counting Of Exposures (AREA)
Description
第１図は本考案の一実施例である。第２図は本
考案の他の実施例である。
１……タイミングスイツチ、１２……第１の半
導体スイツチ、１３……コンデンサ、１４……第
２の半導体スイツチ、１５……光電変換素子、１
６……基準抵抗、１９……露出制御用コンパレー
タ、２０……輝度検知用コンパレータ、２１……
電磁石、２５……発光ダイオード、２８……電池
、２９……電源スイツチ。
FIG. 1 shows an embodiment of the present invention. FIG. 2 shows another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Timing switch, 12... First semiconductor switch, 13... Capacitor, 14... Second semiconductor switch, 15... Photoelectric conversion element, 1
6...Reference resistance, 19...Comparator for exposure control, 20...Comparator for brightness detection, 21...
Electromagnet, 25...Light emitting diode, 28...Battery, 29...Power switch.
Claims (1)
シヤツタにおいて、光電変換素子と輝度検知用基
準抵抗とを直列に接続し、該直列接続した回路に
時定用コンデンサを並列に接続し、前記時定用コ
ンデンサの端子電圧を検出するために、前記時定
用コンデンサの一端を露出制御用コンパレータの
入力端子に接続し且つ第１の半導体スイツチ手段
を介して電源の一端に接続し、また前記光電変換
素子と輝度検知用基準抵抗との接続点を輝度検知
用コンパレータの入力端子に接続し、前記輝度検
知用基準抵抗に第２の半導体スイツチ手段を並列
接続し、前記第１、第２の半導体スイツチ手段は
、シヤツタの起動に連動するタイミングスイツチ
の作動によつてそれぞれオンからオフおよびオフ
からオンに同時にスイツチングすることを特徴と
する電気シヤツタの輝度検知回路と露出制御回路
の切換装置。 In an electric shutter having a brightness detection circuit and an exposure control circuit, a photoelectric conversion element and a reference resistance for brightness detection are connected in series, a time setting capacitor is connected in parallel to the series connected circuit, and the time setting capacitor is connected in parallel to the series connected circuit. In order to detect the terminal voltage of the photoelectric conversion element, one end of the time-limiting capacitor is connected to the input terminal of the exposure control comparator and to one end of the power supply via the first semiconductor switch means. A connection point with a reference resistance for brightness detection is connected to an input terminal of a comparator for brightness detection, a second semiconductor switch means is connected in parallel to the reference resistance for brightness detection, and the first and second semiconductor switch means are connected in parallel to the reference resistance for brightness detection. A switching device for a brightness detection circuit and an exposure control circuit for an electric shutter, characterized in that the switching device simultaneously switches from on to off and from off to on, respectively, by operating a timing switch that is linked to the activation of the shutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986003383U JPS6333214Y2 (en) | 1986-01-14 | 1986-01-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986003383U JPS6333214Y2 (en) | 1986-01-14 | 1986-01-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61135327U true JPS61135327U (en) | 1986-08-23 |
| JPS6333214Y2 JPS6333214Y2 (en) | 1988-09-05 |
Family
ID=30477959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986003383U Expired JPS6333214Y2 (en) | 1986-01-14 | 1986-01-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6333214Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5179347A (en) * | 1974-12-31 | 1976-07-10 | Minolta Camera Kk |
-
1986
- 1986-01-14 JP JP1986003383U patent/JPS6333214Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5179347A (en) * | 1974-12-31 | 1976-07-10 | Minolta Camera Kk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6333214Y2 (en) | 1988-09-05 |
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