CN2071793U - Photoelectric coupler using liquid crystal to adjust light - Google Patents
Photoelectric coupler using liquid crystal to adjust light Download PDFInfo
- Publication number
- CN2071793U CN2071793U CN 90204989 CN90204989U CN2071793U CN 2071793 U CN2071793 U CN 2071793U CN 90204989 CN90204989 CN 90204989 CN 90204989 U CN90204989 U CN 90204989U CN 2071793 U CN2071793 U CN 2071793U
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- CN
- China
- Prior art keywords
- liquid crystal
- light
- housing
- outside
- photoelectric coupler
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- 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.)
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 230000005693 optoelectronics Effects 0.000 abstract description 2
- 238000002834 transmittance Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000005286 illumination Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
Abstract
The utility model relates to an optoelectronic device, especially photoelectric coupler's improvement. A liquid crystal light modulation panel is provided in an optical path from a light emitting element to a light receiving element. Transparent electrodes at both end faces of the liquid crystal are led out of the package, and a voltage applied to the electrodes can control the transmittance of the liquid crystal. Thereby adjusting the current transfer ratio of the photocoupler. The electrodes may also be divided into several small pieces. Enabling multiple control quantities to control the device simultaneously. The small blocks are divided according to a certain rule. The device can be made to have digital-to-analog conversion capability. The device also has a multiplication function. Can be used as a photoelectric coupler with high input impedance. The device is particularly suitable for use as an electronic volume tuner.
Description
The utility model is about photoelectric device, particularly the improvement of photoelectrical coupler.
Photoelectrical coupler is encapsulated in the same housing by light-emitting component and photo detector and constitutes.It has advantages such as can realizing electrical isolation, and just increasingly extensive uses in various electronic equipments, and electric signal often needs to regulate in various device.Certainly directly electric signal is regulated, but, again light signal is regulated if electrical signal conversion is become light signal.Then again light signal is converted to electric signal, some contradiction that is difficult to overcome in the time of can avoiding directly transferring electric signal like this.Propose in the utility application instructions of " photoelectrical coupler that transfer ratio is adjustable " by name as me, with a light shield or refractive body block or the light that reflect different amounts to reach the purpose of conditioning signal, the loose contact problem that is difficult to overcome in the time of just can avoiding regulating electric signal with potentiometer.But this scheme only is suitable for regulating with mechanical shift, and in some occasion, when using remote control adjustment as need, this scheme is then not too suitable.
The purpose of this utility model is: a kind of novel photoelectrical coupler is provided, and the radiation flux on its photo detector photosurface is subjected to the control of an impressed voltage, so that its current delivery specific energy is regulated by impressed voltage.
The scheme that solves is: in the light path of photoelectrical coupler internal illumination element, be mesomorphic material under the temperature in the arrangement when this device work, and install transparency electrode respectively at its light-entering surface and light output surface.Utilize the electrooptical effect of liquid crystal to change radiation flux on the photo detector photosurface.Thereby reach the purpose of regulating the photoelectrical coupler current transfer ratio with voltage, liquid crystal material has multiple photoelectric effect, wherein can be used for this programme mostly.Here only just utilize distortion one to narrate the principle of work of this programme to column effect, in the housing of sealing, liquid crystal material is clipped between two blocks of glass, is mounted with two transparency electrodes of guiding to the housing outside between liquid crystal and two blocks of glass.At two glass outer sides two polaroids of placing are in the same way arranged respectively.They form the liquid crystal light modulation plate.Light-emitting component and photo detector are placed on the both sides of dimmer board respectively, and its light-emitting area and photosurface are staggered relatively.When not having making alive between two transparency electrodes, the light that light-emitting component sends becomes polarized light behind a polaroid, and this polarized light is rotated by 90 degrees through behind the liquid crystal material.Because two polaroids in front and back are equidirectional, so the polarized light after being rotated by 90 degrees can not see through the polaroid of back, this moment, dimmer board was light tight, and photo detector then can not be accepted illumination.After adding certain voltage between two transparency electrodes.The optical activity of liquid crystal material is destroyed, dimmer board printing opacity then, and photo detector is accepted illumination.When institute's making alive changed within the specific limits, the transmissivity of dimmer board also will become thereupon.Thereby change has also taken place in the current transfer ratio of this photoelectrical coupler.
Further improvement of the utility model is: transparency electrode is made plurality of small blocks, and go between respectively to housing, to adapt to a plurality of controlled quentity controlled variables this photoelectronic coupler is controlled simultaneously.The light that sees through on the topped area of each this electrode of piece transparency electrode may command.A kind of special case is wherein arranged.If with electrode by the total light transmission area 1/2nd, 1/4th, eighth rule is divided into some, and directly controls each piece with the binary digit amount, then this device itself just has the digital-to-analog conversion function.
Advantage of the present utility model is that signal is to regulate in light path, have good electrical separation, is difficult for the phase mutual interference between each electric weight.As previously mentioned, this device itself just can have the digital-to-analog conversion function, is convenient to control with digital quantity very much.And this device is of many uses.As input one steady current on the light-emitting component of this device, and signal voltage is added on the transparency electrode, then this device presents high input impedance.And for example two electric signal are added to respectively on light-emitting component and the transparency electrode, then this device has multiplication function.
Accompanying drawing has been described an embodiment of the present utility model.This embodiment adopts the distortion one of liquid crystal to column effect.
Fig. 1 is the side sectional view of this device.
Claims (4)
1, photoelectric device, photoelectrical coupler particularly, it is encapsulated in the same housing by light-emitting component and photo detector and constitutes, it is characterized in that: at light-emitting component in the light path of photo detector, settle a liquid crystal light modulation plate, this plate is gone up liquid crystal material by folder between two glass plates and is constituted, and is mounted with transparency electrode respectively between liquid crystal and two glass plates, and this electrode is guided to outside the housing respectively by lead-in wire.
2, according to the photoelectric device of claim 1, it is characterized in that: a polaroid is settled in the outside at two glass plates of liquid crystal light modulation plate respectively, and two polaroids are placed in the same way, the size that can utilize the distortion one of liquid crystal to regulate luminous flux to column effect like this.
3, according to the photoelectric device of claim 1 and claim 2, it is characterized in that: transparency electrode is divided into plurality of small blocks, and each piece is all leaded to be guided to outside the housing, and this device can be controlled by a plurality of electric signal simultaneously.
4, according to the photoelectric device of claim 3, it is characterized in that: transparency electrode is divided into some by total light transmission area 1/2nd, 1/4th, eighth rule, each piece is guided to outside the housing by lead-in wire respectively, and this device just has the function of the horizontal conversion of number like this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90204989 CN2071793U (en) | 1990-04-14 | 1990-04-14 | Photoelectric coupler using liquid crystal to adjust light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90204989 CN2071793U (en) | 1990-04-14 | 1990-04-14 | Photoelectric coupler using liquid crystal to adjust light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2071793U true CN2071793U (en) | 1991-02-20 |
Family
ID=4885841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90204989 Withdrawn CN2071793U (en) | 1990-04-14 | 1990-04-14 | Photoelectric coupler using liquid crystal to adjust light |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2071793U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9500929B2 (en) * | 2015-04-15 | 2016-11-22 | Chen-Kuo Sun | Vertical electro-optically coupled switch |
| US10036855B1 (en) | 2017-07-13 | 2018-07-31 | Chen-Kuo Sun | Reverse bias modulating waveguide/diode |
| US10126496B1 (en) | 2017-07-13 | 2018-11-13 | Chen-Kuo Sun | Reverse bias modulating multi-material waveguide/diode |
| US10409137B2 (en) | 2017-08-22 | 2019-09-10 | Chen-Kuo Sun | System and method for controlling energy flux modulation |
-
1990
- 1990-04-14 CN CN 90204989 patent/CN2071793U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9500929B2 (en) * | 2015-04-15 | 2016-11-22 | Chen-Kuo Sun | Vertical electro-optically coupled switch |
| US20170038659A1 (en) * | 2015-04-15 | 2017-02-09 | Chen-Kuo Sun | Vertical electro-optically coupled switch |
| US10036855B1 (en) | 2017-07-13 | 2018-07-31 | Chen-Kuo Sun | Reverse bias modulating waveguide/diode |
| US10126496B1 (en) | 2017-07-13 | 2018-11-13 | Chen-Kuo Sun | Reverse bias modulating multi-material waveguide/diode |
| US10409137B2 (en) | 2017-08-22 | 2019-09-10 | Chen-Kuo Sun | System and method for controlling energy flux modulation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |