JPH0629924A - Photocoupler - Google Patents
PhotocouplerInfo
- Publication number
- JPH0629924A JPH0629924A JP18019892A JP18019892A JPH0629924A JP H0629924 A JPH0629924 A JP H0629924A JP 18019892 A JP18019892 A JP 18019892A JP 18019892 A JP18019892 A JP 18019892A JP H0629924 A JPH0629924 A JP H0629924A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- optical
- liquid crystal
- converter
- electric signal
- 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.)
- Withdrawn
Links
Landscapes
- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
- Electronic Switches (AREA)
- Networks Using Active Elements (AREA)
- Optical Communication System (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、異なる種類の電気信号
路間を結合するのに使用されるホトカプラに関する。FIELD OF THE INVENTION This invention relates to photocouplers used to couple different types of electrical signal paths.
【０００２】[0002]
【従来の技術】異なる種類の電気信号路間を結合するた
めの従来のホトカプラは、図２に示すように、電気信号
を光に変換する電気−光変換器１０と、その変換された
光を受けて電気信号に変換する光−電気変換器１１とを
有している。2. Description of the Related Art As shown in FIG. 2, a conventional photocoupler for coupling between different types of electric signal paths includes an electro-optical converter 10 for converting an electric signal into light, and the converted light. The optical-electrical converter 11 receives and converts into an electric signal.
【０００３】[0003]
【発明が解決しようとする課題】この従来のホトカプラ
では、電気−光変換器１０及び光−電気変換器１１を１
対１で内蔵しているだけなので、１本の入力電気信号に
対し出力電気信号も１本しか得られない。この出力信号
を複数回路に切替えて使用する場合には、外部に切替回
路を設けなければならず、全体の回路規模が大型化、複
雑化するという問題点がある。In this conventional photocoupler, the electro-optical converter 10 and the opto-electric converter 11 are integrated into one.
Since only one pair is built in, only one output electric signal can be obtained for one input electric signal. When this output signal is used by switching to a plurality of circuits, a switching circuit must be provided outside, and there is a problem that the overall circuit scale becomes large and complicated.
【０００４】[0004]
【課題を解決するための手段】本発明のホトカプラは、
入力電気信号を光信号に変換する１つの電気−光変換器
と、その光信号をそれぞれ切断切替えする複数の液晶シ
ャッターと、この液晶シャッターを通った前記光信号を
電気信号にそれぞれ変換する複数の光−電気変換器とを
備えている。The photocoupler of the present invention comprises:
One electro-optical converter for converting an input electric signal into an optical signal, a plurality of liquid crystal shutters for cutting and switching the optical signal, and a plurality of for converting the optical signal passing through the liquid crystal shutter into an electric signal. And an optical-electrical converter.
【０００５】[0005]
【実施例】次に、本発明について図面を参照して説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.
【０００６】図１は本発明の一実施例のブロック図であ
る。電気信号が電気−光変換器１に入力されると、光信
号に変換され送出される。その光信号が、制御信号Ａあ
るいはＢで切替制御されている液晶シャッター５Ａある
いは５Ｂを通り、光−電気変換器３Ａあるいは３Ｂに入
力される。光−電気変換器３Ａあるいは３Ｂによって変
換され送出される電気信号ＡあるいはＢは、互いに電気
的に分離した状態で得られる。光−電気変換器３Ａ，３
Ｂへの光信号は、液晶シャッター５Ａ，５Ｂへの制御信
号Ａ，Ｂを切替えることにより、オン−オフを容易に選
択することが可能である。FIG. 1 is a block diagram of an embodiment of the present invention. When an electric signal is input to the electro-optical converter 1, it is converted into an optical signal and transmitted. The optical signal passes through the liquid crystal shutter 5A or 5B whose switching is controlled by the control signal A or B and is input to the optical-electrical converter 3A or 3B. The electric signals A or B converted and transmitted by the opto-electric converter 3A or 3B are obtained in a state where they are electrically separated from each other. Optical-electrical converters 3A, 3
For the optical signal to B, it is possible to easily select ON / OFF by switching the control signals A and B to the liquid crystal shutters 5A and 5B.
【０００７】[0007]
【発明の効果】以上説明したように本発明によれば、１
つの電気−光変換器に対し複数の光−電気変換器とその
光−電気変換器への光信号を切断するための液晶シャッ
タを設けることにより、一つの電気信号を異なる複数の
電気信号回路に切替え分岐できる。As described above, according to the present invention, 1
By providing a plurality of optical-electrical converters for one electric-optical converter and a liquid crystal shutter for cutting an optical signal to the optical-electrical converter, one electric signal can be transmitted to a plurality of different electric signal circuits. Can switch and branch.
【図１】本発明の実施例のブロック図。FIG. 1 is a block diagram of an embodiment of the present invention.
【図２】従来のホトカプラのブロック図。FIG. 2 is a block diagram of a conventional photocoupler.
１，１０ 電気−光変換器 ３Ａ，３Ｂ，１１ 光−電気変換器 ５Ａ，５Ｂ 液晶シャッタ 1,10 Electric-optical converter 3A, 3B, 11 Optical-electric converter 5A, 5B Liquid crystal shutter
───────────────────────────────────────────────────── フロントページの続き (72)発明者 勝倉 弥 宮城県黒川郡大和町吉岡字雷神２番地宮城 日本電気株式会社内 (72)発明者 長田 涼一 宮城県黒川郡大和町吉岡字雷神２番地宮城 日本電気株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ya Katsukura, 2nd Raijin, Yoshioka, Yamato-cho, Kurokawa-gun, Miyagi Nippon Electric Co., Ltd. (72) Ryoichi Nagata 2nd Raijin, Yoshioka, Yamato-cho, Kurokawa-gun, Miyagi Miyagi NEC Corporation
Claims (1)
電気−光変換器と、その光信号をそれぞれ切断切替えす
る複数の液晶シャッターと、この液晶シャッターを通っ
た前記光信号を電気信号にそれぞれ変換する複数の光−
電気変換器とを備えていることを特徴とするホトカプ
ラ。1. An electro-optical converter for converting an input electric signal into an optical signal, a plurality of liquid crystal shutters for cutting and switching the optical signal, respectively, and the optical signal passing through the liquid crystal shutters as an electric signal. Multiple lights to convert-
A photocoupler comprising an electric converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18019892A JPH0629924A (en) | 1992-07-08 | 1992-07-08 | Photocoupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18019892A JPH0629924A (en) | 1992-07-08 | 1992-07-08 | Photocoupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0629924A true JPH0629924A (en) | 1994-02-04 |
Family
ID=16079118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18019892A Withdrawn JPH0629924A (en) | 1992-07-08 | 1992-07-08 | Photocoupler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0629924A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006287383A (en) * | 2005-03-31 | 2006-10-19 | Casio Comput Co Ltd | Information transmission system, imaging device, and light receiving control method |
| US7385655B2 (en) | 2002-09-02 | 2008-06-10 | Semiconductor Energy Laboratory Co., Ltd. | Electronic circuit device with optical sensors and optical shutters at specific locations |
| US7769253B2 (en) | 2002-09-02 | 2010-08-03 | Semiconductor Energy Laboratory Co., Ltd. | Electronic circuit device |
-
1992
- 1992-07-08 JP JP18019892A patent/JPH0629924A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7385655B2 (en) | 2002-09-02 | 2008-06-10 | Semiconductor Energy Laboratory Co., Ltd. | Electronic circuit device with optical sensors and optical shutters at specific locations |
| US7769253B2 (en) | 2002-09-02 | 2010-08-03 | Semiconductor Energy Laboratory Co., Ltd. | Electronic circuit device |
| JP2006287383A (en) * | 2005-03-31 | 2006-10-19 | Casio Comput Co Ltd | Information transmission system, imaging device, and light receiving control method |
| JP4576625B2 (en) * | 2005-03-31 | 2010-11-10 | カシオ計算機株式会社 | Information transmission system, imaging apparatus, and light reception control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19991005 |