JPS6446731A - Optical modulator - Google Patents
Optical modulatorInfo
- Publication number
- JPS6446731A JPS6446731A JP20442587A JP20442587A JPS6446731A JP S6446731 A JPS6446731 A JP S6446731A JP 20442587 A JP20442587 A JP 20442587A JP 20442587 A JP20442587 A JP 20442587A JP S6446731 A JPS6446731 A JP S6446731A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- bias
- voltage
- transmittivity
- liquid crystal
- 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.)
- Pending
Links
Landscapes
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
PURPOSE:To vary the transmittivity of an optical switch by giving a DC bias to an AC voltage applied to a liquid crystal cell, and controlling the DC bias. CONSTITUTION:A scanning electrode 4 is used as a common electrode, an AC voltage is applied uniformly between an auxiliary electrode 2 and the scanning electrode 4 by an AC voltage power source 9, and a DC voltage is applied through a resistance R10 to an arbitrary one in an electrode group being a signal electrode 5 which is brought to wiring in a stripe shape, and is formed by an ITO film. In order that an AC bias electric field is applied effectively, it is desirable that 100kOMEGA-10MOMEGA is connected as R, and when only the AC voltage is applied, a liquid crystal cell becomes turbid in white, and the transmittivity becomes minimum. In this state, when a prescribed DC bias is given to an intersection part of the selected scanning electrode 4 and the signal electrode 5, the transparency of its intersection part increases, and the transmittivity increases. In such a way, by bringing the DC bias to a variable control by a variable DC power source 8, the transmittivity of an optical switch can be changed.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20442587A JPS6446731A (en) | 1987-08-17 | 1987-08-17 | Optical modulator |
| US07/090,241 US4773738A (en) | 1986-08-27 | 1987-08-25 | Optical modulation device using ferroelectric liquid crystal and AC and DC driving voltages |
| DE3788909T DE3788909T2 (en) | 1986-08-27 | 1987-08-26 | Optical modulation device. |
| EP87112410A EP0257638B1 (en) | 1986-08-27 | 1987-08-26 | Optical modulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20442587A JPS6446731A (en) | 1987-08-17 | 1987-08-17 | Optical modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6446731A true JPS6446731A (en) | 1989-02-21 |
Family
ID=16490326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20442587A Pending JPS6446731A (en) | 1986-08-27 | 1987-08-17 | Optical modulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6446731A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0497124A (en) * | 1990-08-09 | 1992-03-30 | Sharp Corp | Color liquid crystal display device |
| US5144471A (en) * | 1989-06-27 | 1992-09-01 | Victor Company Of Japan, Ltd. | Optical scanning system for scanning object with light beam and displaying apparatus |
| JP2012190017A (en) * | 2011-02-25 | 2012-10-04 | Semiconductor Energy Lab Co Ltd | Display device |
| WO2016027526A1 (en) * | 2014-08-20 | 2016-02-25 | 株式会社日立製作所 | Rotating electric machine |
-
1987
- 1987-08-17 JP JP20442587A patent/JPS6446731A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5144471A (en) * | 1989-06-27 | 1992-09-01 | Victor Company Of Japan, Ltd. | Optical scanning system for scanning object with light beam and displaying apparatus |
| JPH0497124A (en) * | 1990-08-09 | 1992-03-30 | Sharp Corp | Color liquid crystal display device |
| JP2012190017A (en) * | 2011-02-25 | 2012-10-04 | Semiconductor Energy Lab Co Ltd | Display device |
| US9443455B2 (en) | 2011-02-25 | 2016-09-13 | Semiconductor Energy Laboratory Co., Ltd. | Display device having a plurality of pixels |
| WO2016027526A1 (en) * | 2014-08-20 | 2016-02-25 | 株式会社日立製作所 | Rotating electric machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ATE126381T1 (en) | LIQUID CRYSTAL DISPLAY DEVICE WITH CONTROLLED SHUTOFF. | |
| CA2023369A1 (en) | Image forming apparatus utilizing an ac voltage control circuit | |
| JPS6482013A (en) | Apparatus equipped with light waveguide and electrode | |
| JPS6446731A (en) | Optical modulator | |
| JPS57185418A (en) | Optical switching method | |
| EP0370627A3 (en) | Optical device with dielectric heating | |
| JPS5681818A (en) | Refractive index control device | |
| JPS5735828A (en) | Integrated optical switch | |
| KR920016877A (en) | Frequency Controlled Optics | |
| CH614595GA3 (en) | ||
| GB2193337B (en) | Optical switch apparatus | |
| GB1482644A (en) | Digital beam deflector | |
| JPS5746232A (en) | Electro-chromic display | |
| JPS60114825A (en) | Liquid crystal display device | |
| JPS6463931A (en) | Liquid crystal optical modulation device | |
| FR2266420A1 (en) | Liq. crystal cell controller and visual panel - incorporates triacs connected to system supplying logic information as binary signals | |
| FR2412899B3 (en) | ||
| CH621452GA3 (en) | ||
| JPS56138725A (en) | Electro-optic effect optical switch | |
| ES8308168A1 (en) | Protection circuit for a power transistor | |
| JPS56138724A (en) | Electro-optic effect optical switch | |
| JPS57185017A (en) | Optical switch for optical fiber | |
| JPS57158619A (en) | Liquid crystal display device | |
| JPS561622A (en) | Digital output device | |
| FR2250458A5 (en) | Electro-optical display device - has birefringent strip and liquid crystal between pair of electrodes |