CN218782445U - Differential optical coupler device - Google Patents
Differential optical coupler device Download PDFInfo
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- CN218782445U CN218782445U CN202223284998.1U CN202223284998U CN218782445U CN 218782445 U CN218782445 U CN 218782445U CN 202223284998 U CN202223284998 U CN 202223284998U CN 218782445 U CN218782445 U CN 218782445U
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Abstract
A differential optical coupling device includes a light emitting unit, a receiving unit and a differential unit. The light emitting unit outputs first light. The receiving unit is disposed at one side of the light emitting unit and includes a first receiver and a second receiver. The first receiver receives the first light to generate a first signal, and the second receiver receives a portion of the first light to generate a second signal. The differential unit is electrically connected with the receiving unit and receives and compares the first signal and the second signal to generate a differential signal.
Description
Technical Field
The present application relates to an optical coupler device, and more particularly, to a differential optical coupler device capable of reducing environmental interference.
Background
Taking a conventional optocoupler as an example, a separate light emitting device is usually disposed corresponding to each signal channel, and a separate receiving module is disposed corresponding to each light emitting unit. When the light emitting device outputs the light signal, the system determines whether the signal is an ON or OFF signal according to the light signal received by the receiving module.
However, the conventional optocoupler is easily interfered by noise in the external environment, so that the receiving module is difficult to distinguish or eliminate the interfering signal. In order to avoid the erroneous judgment of the receiving module due to noise interference, the intensity of the optical signal is usually increased (for example, increasing the light emitting intensity or improving the light transmission efficiency) in the conventional method, and especially the intensity of the optical signal must be greater than the interference signal, thereby reducing the influence of the environmental interference. However, such a method cannot substantially eliminate the environmental interference, and the operation efficiency of the optical coupler is poor.
Therefore, how to design a differential optical coupling device to solve the above technical problems is an important issue studied by the applicant of the present application.
SUMMERY OF THE UTILITY MODEL
One of the objectives of the present invention is to provide a differential optical coupler, which can solve the technical problems of the prior art that the environmental interference cannot be substantially eliminated and the operation efficiency is not good, and achieve the purposes of convenient use and high-efficiency operation by common-mode and differential signal processing.
In order to achieve the above object, the differential optical coupler device proposed in the present application includes a light emitting unit, a receiving unit, and a differential unit. The light emitting unit outputs first light. The receiving unit is disposed at one side of the light emitting unit and includes a first receiver and a second receiver. The first receiver receives the first light to generate a first signal, and the second receiver receives a portion of the first light to generate a second signal. The differential unit is electrically connected with the receiving unit and receives and compares the first signal and the second signal to generate a differential signal.
In some embodiments, the differential optocoupler device further includes a light transmitting unit disposed between the light emitting unit and the receiving unit, wherein the first light penetrates the light transmitting unit.
In some embodiments, the light-transmitting unit includes a first light transmittance and a second light transmittance, the first light transmittance is different from the second light transmittance, and the light-transmitting unit differentially distributes the first light to the first receiver and the second receiver.
In some embodiments, the light emitting unit includes a light shielding structure, and the light shielding structure absorbs or scatters the first light and makes a first light intensity of a portion of the first light incident to the first receiver greater than a second light intensity of a portion of the first light incident to the second receiver.
In some embodiments, the light emitting unit includes a first light source and a second light source. The first light source outputs first light to the receiving unit. The second light source is similar to the first light source, the second light source is correspondingly arranged in a manner that the first light source corresponds to the first receiver, the first light source is better arranged than the first receiver, and the second light source is better arranged than the second receiver.
In some embodiments, the second light source outputs the second light to the receiving unit. The first receiver receives the first light and part of the second light to generate a first signal; the second receiver receives a portion of the first light and the second light to generate a second signal.
In some embodiments, the first receiver includes a first active region and a first inactive region, and the second receiver includes a second active region and a second inactive region.
In order to achieve the above objective, the present application provides a differential optical coupling device including a substrate, a light emitting unit, a light transmitting unit, a first receiver, and a second receiver. The light emitting unit is disposed over the substrate and outputs first light. The light transmitting unit is arranged between the substrate and the light emitting unit, the first receiver and the second receiver are clamped between the substrate and the light transmitting unit, and the first light penetrates through the light transmitting unit. The first receiver is arranged on the substrate and receives the light intensity of the first part of the first light to generate a first signal. The second receiver and the first receiver are arranged on the substrate in a mutually adjacent and matched mode, and receive the light intensity of the second part of the first light to generate a second signal. Wherein the light intensity of the first portion is greater than the light intensity of the second portion.
In some embodiments, the differential optocoupler device further includes a differential unit electrically connected to the first receiver and the second receiver, and configured to receive and compare the first signal and the second signal to generate a differential signal.
In some embodiments, the light-transmitting unit includes a first light transmittance and a second light transmittance, the first light transmittance is different from the second light transmittance, and the light-transmitting unit differentially distributes the first light to the first receiver and the second receiver.
In summary, the differential optical coupler device described herein obtains a first signal and a second signal capable of performing differential processing by using two receivers (e.g., a first receiver and a second receiver) that can be matched and are disposed adjacently or symmetrically, and then inputs the first signal and the second signal to a differential unit (e.g., a differential amplifier, etc.), so that the differential unit compares the first signal and the second signal (e.g., subtracts the first signal and the second signal) to generate a differential signal, and at this time, the system can determine whether the current information is an ON (ON) or OFF (OFF) message according to the differential signal.
Further, in order to efficiently eliminate the environmental interference, the light source has different preference degrees for each receiver. In some embodiments, the light-emitting unit is designed to be better than the first light input to the first receiver, and the design may be performed locally (e.g., closer to the first receiver), optically (e.g., the first light is differentially distributed to the first receiver and the second receiver by non-uniform light transmittance), or by absorbing or scattering the first light through the light-shielding structure, so that the first light intensity of the first light incident to the first receiver is greater than the second light intensity of the part of the first light incident to the second receiver).
In some embodiments, the light emitting unit may further include a second light source, and the second light source may be a dummy light source (dummy) that does not emit light or a light emitting element having a different brightness from the first light source. When the first light source corresponds to the first receiver in position and the second light source corresponds to the second receiver in position, in addition to generating a common reverse differential signal (i.e., for example, dimming the first light and dimming the second light, the signal received by the second receiver can be made larger than that of the first receiver), the second light source also has another function of keeping the two receivers (e.g., the first receiver and the second receiver) highly consistent with the parasitic effect of the external environment, i.e., the environmental interferences received by the first receiver and the second receiver are the same, thereby greatly reducing the problem caused by the asymmetric environmental interferences in the differential processing.
Therefore, the differential optocoupler device can solve the technical problems that the prior art cannot greatly eliminate environmental interference and is poor in operating efficiency, and can achieve the purposes of convenience in use and high-efficiency operation by means of common-mode and differential signal processing.
It should be noted that the signal processing may be, but is not limited to, common mode suppression and differential mode amplification in the analog stage.
For a further understanding of the techniques, approaches, and functions adopted by the present application to achieve the intended purposes, reference should be made to the following detailed description and accompanying drawings, which are believed to be illustrative of the invention, 2400and features thereof, and thus will be described in detail, and reference should be made to the drawings which are provided for purposes of illustration and description only and are not intended to be limiting.
The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will be readily apparent by reference to the drawings and following detailed description.
Drawings
In the drawings, like reference characters designate like or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are not to be considered limiting of its scope.
FIG. 1 is a schematic diagram of one embodiment of a differential optical coupling device according to the present invention;
fig. 2 is a schematic structural diagram of a differential optocoupler device according to a first embodiment of the present application;
fig. 3 is a schematic structural diagram of a differential optical coupler according to a second embodiment of the present application;
FIG. 4 is a schematic diagram of another embodiment of a differential optical coupling device according to the present invention;
fig. 5 is a schematic structural diagram of a differential optical coupler according to a third embodiment of the present application;
fig. 6 is a schematic structural diagram of a differential optical coupler according to a fourth embodiment of the present application; and
fig. 7 is an external view of a differential optical coupler device according to a fifth embodiment of the present application.
Description of reference numerals:
1. 2: a differential optocoupler;
10: a light emitting unit;
11: a first light;
12: a first light source;
13. 13': a second light source;
14: a second light;
20: a light transmitting unit;
21: a first light-transmitting region;
22: a second light-transmitting region;
30: a receiving unit;
31: a first active region;
32: a first ineffective area;
33: a second active region;
34: a second invalid region;
40: a differential unit;
50: an output unit;
100: a drive plate;
101: a substrate;
200: a light shielding structure;
PD1: a first receiver;
PD2: a second receiver;
PS1: a first signal;
PS2: a second signal;
and (2) DS: a differential signal.
Detailed Description
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is capable of other and different embodiments and its several details are capable of modification and various changes in detail without departing from the spirit and scope of the present application.
It should be understood that the structures, ratios, sizes, and numbers of elements shown in the drawings and described in the specification are for understanding and reading only, and are not to be construed as limiting the scope of the present disclosure, which is defined by the claims and the appended claims.
The technical contents and detailed description of the present application are described below with reference to the drawings.
FIG. 1 is a schematic diagram of one embodiment of a differential optical coupling device according to the present invention; fig. 2 is a schematic structural diagram of a differential optical coupler device according to a first embodiment of the present application.
Referring to fig. 1 and fig. 2 together, the differential optocoupler device 1 provided in the present application includes a light emitting unit 10, a light transmitting unit 20, a receiving unit 30, and a differential unit 40.
The light emitting unit 10 outputs first light 11.
In some embodiments, the light emitting unit 10 is electrically connected to the driving board 100, and the driving board 100 is used to drive the brightness, or the period, frequency or pattern of the brightness, but not limited thereto, of the light emitting unit 10.
In some embodiments, the light emitting unit 10 may include a light-emitting diode (LED), and the LED may include an infrared or red LED (for example: aluminum gallium arsenide (AlGaAs), gallium arsenide phosphide (GaAsP), indium gallium aluminum phosphide (AlGaInP), gallium doped zinc oxide (GaP: znO)), orange light emitting diodes (e.g., gallium arsenide phosphide (GaAsP), indium gallium aluminum phosphide (AlGaInP), gallium phosphide doped X (GaP: X)), yellow light emitting diodes (e.g., gallium arsenide phosphide (GaAsP), indium gallium aluminum phosphide (AlGaInP), gallium nitride (AlGaN)), green light emitting diodes (e.g., indium gallium nitride (InGaN), gallium nitride (GaN), gallium phosphide (GaP), indium gallium aluminum phosphide (AlGaInP), aluminum gallium phosphide (lGaP)), blue light emitting diodes (e.g., zinc selenide (ZnSe), indium gallium nitride (InGaN), silicon carbide (SiC)), violet light emitting diodes (e.g., indium gallium nitride (InGaN)), and infrared light emitting diodes (e.g., gallium arsenide (GaAs), aluminum gallium arsenide (AlGaAs) or diamond diodes (e.g., diamond), aluminum gallium nitride (AlN), aluminum nitride (AlGaN) in the form, OLED), though not limited thereto.
The light transmitting unit 20 is disposed between the light emitting unit 10 and the receiving unit 30, and the first light 11 penetrates through the light transmitting unit 20.
In some embodiments, the light-transmitting unit 20 may include a polymer material (e.g., PET, PMMA, PI (polyimide), PC (polycarbonate), epoxy, etc.) having an electrical insulation property capable of transmitting light or partially transmitting light, and may be formed by non-uniformity of molecular density of the polymer material, or by doping metal or metal oxide (e.g., tiO) 2 、Al 2 O 3 ) Or scattering/reflecting/refracting particles such as silicon dioxide, etc., to achieve different light transmittances of the light transmitting units 20 in different areas, so as to distribute the first light 11 to the first receiver PD1 and the second receiver PD2 differently, but not limited thereto.
The receiving unit 30 is disposed at one side of the light emitting unit 10 and includes a first receiver PD1 and a second receiver PD2. Further, the first receiver PD1 is configured to mainly receive the first light 11 to generate a first signal PS1; the second receiver PD2 is configured to receive a portion of the first light 11 to generate a second signal PS2.
In some embodiments, the first receiver PD1 and the second receiver PD2 may be matched, adjacent, symmetrical (e.g., same-direction arrangement or mirror arrangement), and have the same physical quantity (e.g., the same size, dimension, etc.) and the same material, so that the first receiver PD1 and the second receiver PD2 have the same parasitic effect with the external environment and receive the common-mode environmental interference, so as to greatly reduce the environmental interference when performing the differential processing on the first signal PS1 and the second signal PS2 subsequently, but not limited thereto.
In some embodiments, the light emitting unit 10 is preferred to input the first light 11 to the first receiver PD1, i.e. the first receiver PD1 will receive more first light 11 than the second receiver PD2. Such as, but not limited to, the location of the light emitting unit 10 being closer to the first receiver PD1, the path for the first light 11 being transmitted to the first receiver PD1 being shorter, broader, more direct, the path for the first light 11 being transmitted to the first receiver PD1 being less obstructed than the path for the second receiver PD2, etc., the preference being relative between the first receiver PD1 and the second receiver PD2.
In other embodiments not shown, the receiving unit 30 may also include an additional dummy receiving module (dummy PD) as a reference for dark current, and the present application only emphasizes at least two receiving modules (e.g., the first receiver PD1 and the second receiver PD 2), and does not exclude the dummy receiving module for eliminating dark current, but is not limited thereto.
The differential unit 40 is electrically connected to the receiving unit 30, and receives and compares the first signal PS1 and the second signal PS2 to generate a differential signal DS.
In some embodiments, the differential unit 40 may include a differential amplifier (as shown in fig. 1), and the first receiver PD1 is connected to one input terminal (e.g., positive terminal (+)) of the differential amplifier, and the second receiver PD2 is connected to the other input terminal (e.g., negative terminal (-)) of the differential amplifier, but is not limited thereto.
Further, the differential unit 40 compares the first signal PS1 and the second signal PS2 and performs the following operations: PS1-PS2 is about equal to DS. Therefore, the common mode part of the first signal PS1 and the second signal PS2 is eliminated by differential operation, so as to effectively distinguish the environmental interference and obtain the differential signal DS which greatly reduces the environmental common mode interference, but the invention is not limited thereto.
The differential optical coupler 1 may further include a substrate 101 and a light shielding structure 200 (as shown in fig. 2).
The light emitting unit 10 is disposed on the substrate 101, the light transmitting unit 20 is disposed between the substrate 101 and the light emitting unit 10, and the first receiver PD1 and the second receiver PD2 are disposed on the substrate 101, which is not limited thereto.
The light shielding structure 200 absorbs or scatters the first light 11, and makes a first light intensity of the first light 11 incident to the first receiver PD1 greater than a second light intensity of a portion of the first light 11 incident to the second receiver PD2.
In some embodiments, the light shielding structure 200 may be disposed at a side of the light emitting unit 10 (for example, the left side of the light emitting unit 10 shown in fig. 2), whereby the first light 11 output by the light emitting unit 10 is limited in light emitting angle by the light shielding structure 200, and the light pattern is also changed, which is expected to cause a relatively large energy intensity of the first light 11 to be projected to the first receiver PD1, but is not limited thereto.
Furthermore, besides using the absorption material, the light-shielding structure 200 may also use a reflective or scattering material (e.g., reflective particles or particles with non-uniform refractive index, or an injection-molded coating material) to reduce the light-transmitting effect or transmittance, thereby achieving the effect of enhancing the preference. The scattering (scattering) technique applied to the scattering material is very common in the industry, and therefore, is not described herein in detail, but is not limited thereto.
In some embodiments, the differential optical coupler 1 may further include an output unit 50, wherein the output unit 50 is electrically connected to the differential unit 40 for receiving the differential signal DS and determining whether the current information is an ON (ON) or OFF (OFF) message, but is not limited thereto. In addition to the ON/OFF output type, the output unit 50 can directly output the differential signal DS as an analog output, or can set up the encoding principle for logic output, but it is not limited thereto.
Therefore, the differential optocoupler device 1 of the present application obtains the first signal PS1 and the second signal PS2 capable of performing differential processing by using two receivers (e.g., the first receiver PD1 and the second receiver PD 2) that can be matched and are disposed adjacently or symmetrically, and then inputs the first signal PS1 and the second signal PS2 to the differential unit 40 (e.g., a differential amplifier, etc.), so that the differential unit 40 compares the first signal PS1 and the second signal PS2 (e.g., subtracts the first signal PS1 and the second signal PS 2) to generate the differential signal DS, and at this time, the system can determine the information that should be output at present according to the differential signal DS.
Further, in order to effectively eliminate the environmental interference, the light source has different preference degrees for each receiver. In some embodiments, the light emitting unit 10 is preferably designed to input the first light 11 to the first receiver PD1, and the design may be performed in a location (e.g., closer to the first receiver PD 1), an optical location (e.g., the first light 11 is differentially distributed to the first receiver PD1 and the second receiver PD2 by non-uniform light transmittance), or a non-limiting manner by absorbing or scattering the first light 11 through the light shielding structure 200, and making a first light intensity of the first light 11 incident to the first receiver PD1 greater than a second light intensity of a portion of the first light 11 incident to the second receiver PD 2).
Fig. 3 is a schematic structural diagram of a differential optical coupler according to a second embodiment of the present application.
Referring to fig. 1 and fig. 3, a second embodiment of the present application is substantially the same as the first embodiment, but the light-transmitting unit 20 includes a first light-transmitting region 21 with a first transmittance and a second light-transmitting region 22 with a second transmittance, the first transmittance and the second transmittance are different, and the first light-transmitting region 21 and the second light-transmitting region 22 of the light-transmitting unit 20 differentially distribute the first light 11 to the first receiver PD1 and the second receiver PD2.
Further, the first transmittance is higher than the second transmittance, that is, the first light-transmitting region 21 can transmit more first light 11 than the second light-transmitting region 22. As shown in fig. 3, the first light-transmitting region 21 is disposed above the first receiver PD1, and the density of the particle material is low, so that the first receiver PD1 can receive more first light 11 than the second receiver PD2, but not limited thereto. The transmittance may be increased by decreasing the particle size, for example, when the particle size is much smaller than the wavelength of the first light, such as when the scattering effect enters the Rayleigh scattering (Rayleigh scattering) range, the transmittance may be greatly increased.
FIG. 4 is a schematic diagram of another embodiment of a differential optical coupling device according to the present invention; fig. 5 is a schematic structural diagram of a differential optical coupler device according to a third embodiment of the present application.
Referring to fig. 1, 2, 4 and 5, the differential optical coupler 2 shown in fig. 4 of the present application is substantially the same as the differential optical coupler 1 shown in fig. 1, and the third embodiment shown in fig. 5 is substantially the same as the first embodiment shown in fig. 1, but the light emitting unit 10 includes a first light source 12 and a second light source 13, the first light source 12 and the second light source 13 are separated by a light shielding structure 200, and the second light source 13 outputs a second light 14 to the receiving unit 30.
In some embodiments, the first receiver PD1 primarily receives the first light 11 and receives a portion of the second light 14 to generate a first signal PS1; the second receiver PD2 mainly receives the second light 14 and receives part of the first light 11 to generate a second signal PS2.
Further, the second light source 13 has substantially the same physical quantity (e.g., the same material, structure, size, dimension, etc.) as the first light source 12, the second light source 13 and the first light source 12 are similar to each other, the second light source 13 is correspondingly disposed in a manner that the first light source 12 corresponds to the first receiver PD1, the first light source 12 is better disposed in design than the first receiver PD1, and the second light source 13 is better disposed in design than the second receiver PD2. The design may be performed locally (e.g., the first light source 12 is closer to the first receiver PD1, and the second light source 13 is closer to the second receiver PD 2), optically (e.g., the first light 11 is differentially distributed to the first receiver PD1 and the second receiver PD2 by non-uniform light transmittance), or the first light 11 is absorbed or scattered by the light shielding structure 200, and the first light intensity of the first light 11 incident to the first receiver PD1 is greater than the second light intensity of a portion of the first light 11 incident to the second receiver PD 2), but is not limited thereto.
In some embodiments, the first light source 12 and the second light source 13 may include light-emitting diodes (LEDs), and the LEDs may include infrared or red LEDs (for example: aluminum gallium arsenide (AlGaAs), gallium arsenide phosphide (GaAsP), indium gallium aluminum phosphide (AlGaInP), gallium doped zinc oxide (GaP: znO)), orange light emitting diodes (e.g., gallium arsenide phosphide (GaAsP), indium gallium aluminum phosphide (AlGaInP), gallium phosphide doped X (GaP: X)), yellow light emitting diodes (e.g., gallium arsenide phosphide (GaAsP), indium gallium aluminum phosphide (AlGaInP), gallium nitride (AlGaN)), green light emitting diodes (e.g., indium gallium nitride (InGaN), gallium nitride (GaN), gallium phosphide (GaP), indium gallium aluminum phosphide (AlGaInP), aluminum gallium phosphide (lGaP)), blue light emitting diodes (e.g., zinc selenide (ZnSe), indium gallium nitride (InGaN), silicon carbide (SiC)), violet light emitting diodes (e.g., indium gallium nitride (InGaN)), and infrared light emitting diodes (e.g., gallium arsenide (GaAs), aluminum gallium arsenide (AlGaAs) or diamond diodes (e.g., diamond), aluminum gallium nitride (AlN), aluminum nitride (AlGaN) in the form, OLED), although not limited thereto.
Therefore, when the first light source 12 corresponds to the first receiver PD1 in position and the second light source 13 corresponds to the second receiver PD2 in position, the second light source 13 in cooperation with the first light source 12 can generate a common reverse differential signal (i.e. for example, the first light is dimmed and the second light is brightened, so that the signal received by the second receiver PD2 is larger than that of the first receiver PD 1), and the second light source 13 also functions to keep the two receivers (e.g. the first receiver PD1 and the second receiver PD 2) highly consistent with the parasitic effect of the external environment, i.e. the environmental interferences received by the first receiver PD1 and the second receiver PD2 are the same, thereby greatly reducing the problem caused by the asymmetric environmental interference in the differential processing.
Fig. 6 is a schematic structural diagram of a differential optical coupler device according to a fourth embodiment of the present application.
Referring to fig. 4 to 6, a fourth embodiment of the present application is substantially the same as the third embodiment, except that the second light source 13' may be a dummy light source (dummy), and the second light source 13' has substantially the same physical quantity (e.g., the same size, dimension, etc.) as the first light source 12, and the difference is that the second light source 13' does not emit light.
In some embodiments, the second light source 13' and the first light source 12 are similar to each other, the second light source 13' is arranged correspondingly in a manner that the first light source 12 corresponds to the first receiver PD1, the first light source 12 is arranged better in design than the first receiver PD1, and the second light source 13' is arranged better in design than the second receiver PD2. The design may be performed locally (e.g., the first light source 12 is closer to the first receiver PD1, and the second light source 13' is closer to the second receiver PD 2), optically (e.g., the first light 11 is differentially distributed to the first receiver PD1 and the second receiver PD2 by non-uniform light transmittance), or the first light 11 is absorbed or scattered by the light shielding structure 200, and the first light intensity of the first light 11 incident to the first receiver PD1 is greater than the second light intensity of a portion of the first light 11 incident to the second receiver PD 2), but is not limited thereto.
For this reason, when the first light source 12 is located corresponding to the first receiver PD1, and the second light source 13 'is located corresponding to the second receiver PD2, the second light source 13' is used to keep the two receivers (e.g., the first receiver PD1 and the second receiver PD 2) highly consistent with the parasitic effect of the external environment, i.e., the environmental interference received by the first receiver PD1 and the second receiver PD2 is the same, thereby greatly reducing the problem caused by the asymmetric environmental interference in the differential processing.
It is worth mentioning that the dummy source cannot generate the inverse differential signal, and there is only one purpose to let two receivers (e.g., the first receiver PD1 and the second receiver PD 2) see the same interference, so that the interference can be reduced.
Fig. 7 is an external view of a differential optical coupler device according to a fifth embodiment of the present application.
Referring to fig. 4, 5 and 7, a fifth embodiment of the present application is substantially the same as the third embodiment, except that the first receiver PD1 includes a first active area (active) 31 and a first inactive area (dummy) 32, and the second receiver PD2 includes a second active area 33 and a second inactive area 34.
For this reason, the first inactive area 32 can be used as a reference for dark current for the first active area 31, and the second inactive area 34 can be used as a reference for dark current for the second active area 33, thereby obtaining more accurate first signal PS1 and second signal PS2, but it is not limited thereto.
In summary, the differential optical coupler device described in the present application obtains the first signal and the second signal capable of performing differential processing by using two receivers (e.g., a first receiver and a second receiver) that can be matched and are disposed adjacently or symmetrically, and then inputs the first signal and the second signal to the differential unit (e.g., a differential amplifier, etc.), so that the differential unit compares the first signal and the second signal (e.g., subtracts the first signal and the second signal) to generate a differential signal, and at this time, the system can determine current information according to the differential signal.
Further, in order to efficiently eliminate the environmental interference, the light source has different preference degrees for each receiver. In some embodiments, the light-emitting unit is designed to be better than the first light input to the first receiver, and the design may be performed locally (e.g., closer to the first receiver), optically (e.g., the first light is differentially distributed to the first receiver and the second receiver by non-uniform light transmittance), or by absorbing or scattering the first light through the light-shielding structure, so that the first light intensity of the first light incident to the first receiver is greater than the second light intensity of the part of the first light incident to the second receiver).
In some embodiments, the light emitting unit may further include a second light source, and the second light source may be a dummy light source (dummy) that does not emit light or a light emitting element that is performance-matched to the first light source. When the first light source corresponds to the first receiver in position and the second light source corresponds to the second receiver in position, the second light source is used in cooperation with the first light source to generate common reverse differential signals, so that parasitic effects of the two receivers (e.g., the first receiver and the second receiver) and the external environment are kept highly consistent, that is, the environmental interferences received by the first receiver and the second receiver are the same, thereby greatly reducing the problems caused by asymmetric environmental interferences in the differential processing.
In some embodiments, the first receiver and the second receiver each include an inactive area that can be used as a reference for dark current, thereby obtaining more accurate first signal and second signal, but not limited thereto.
Therefore, the differential optocoupler device can solve the technical problems that the prior art cannot greatly eliminate environmental interference and is poor in operating efficiency, and can achieve the purposes of convenience in use and high-efficiency operation by means of common-mode and differential signal processing.
It should be noted that the signal processing may be, but is not limited to, common mode suppression and differential mode amplification in the analog stage.
While the invention has been described in detail and with reference to the drawings, it is to be understood that the invention is not limited to 20407073, but is intended to cover all modifications and variations within the spirit and scope of the present invention as defined by the appended claims.
Claims (10)
1. A differential optical coupling device, comprising:
a light emitting unit outputting first light;
the receiving unit is arranged at one side of the light-emitting unit and comprises a first receiver and a second receiver, wherein the first receiver receives the first light to generate a first signal, and the second receiver receives part of the first light to generate a second signal; and
and the differential unit is electrically connected with the receiving unit and receives and compares the first signal and the second signal to generate a differential signal.
2. The differential optical coupler device according to claim 1, further comprising:
and the light transmitting unit is arranged between the light emitting unit and the receiving unit, and the first light penetrates through the light transmitting unit.
3. The differential optical coupler device according to claim 2, wherein the light transmissive unit comprises a first light transmittance and a second light transmittance, the first light transmittance is different from the second light transmittance, and the light transmissive unit differentially distributes the first light to the first receiver and the second receiver.
4. The differential optical coupler device according to claim 1, wherein the light emitting unit comprises:
and the light shielding structure absorbs or scatters the first light, and makes the first light intensity of the first light incident to the first receiver greater than the second light intensity of part of the first light incident to the second receiver.
5. The differential optical coupler device according to claim 1, wherein the light emitting unit comprises:
a first light source outputting the first light to the receiving unit; and
a second light source;
the second light source is similar to the first light source, and the second light source is correspondingly arranged in a manner that the first light source corresponds to the first receiver;
wherein the first light source is positioned to favor the first receiver and the second light source is positioned to favor the second receiver.
6. The differential optical coupler according to claim 5, wherein the second light source outputs a second light to the receiving unit;
wherein the first receiver receives the first light and a portion of the second light to generate the first signal; the second receiver receives a portion of the first light and the second light to generate the second signal.
7. The differential optocoupler device according to claim 1, wherein the first receiver comprises a first active region and a first inactive region, and the second receiver comprises a second active region and a second inactive region.
8. A differential optical coupling device, comprising:
a substrate;
a light emitting unit disposed on the substrate and outputting a first light;
the light transmitting unit is arranged between the substrate and the light emitting unit, and clamps the first receiver and the second receiver between the substrate and the light transmitting unit, and the first light penetrates through the light transmitting unit;
the first receiver is arranged on the substrate and used for receiving the light intensity of the first part of the first light to generate a first signal; and
the second receiver is matched with the first receiver and arranged on the substrate, receives the light intensity of a second part of the first light to generate a second signal, wherein the first part is larger than the second part.
9. The differential optical coupling device of claim 8, further comprising:
and the differential unit is electrically connected with the first receiver and the second receiver and is used for receiving and comparing the first signal and the second signal to generate a differential signal.
10. The differential optical coupler device according to claim 8, wherein the light transmissive unit comprises a first light transmittance and a second light transmittance, the first light transmittance is different from the second light transmittance, and the light transmissive unit differentially distributes the first light to the first receiver and the second receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223284998.1U CN218782445U (en) | 2022-12-08 | 2022-12-08 | Differential optical coupler device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223284998.1U CN218782445U (en) | 2022-12-08 | 2022-12-08 | Differential optical coupler device |
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| Publication Number | Publication Date |
|---|---|
| CN218782445U true CN218782445U (en) | 2023-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223284998.1U Active CN218782445U (en) | 2022-12-08 | 2022-12-08 | Differential optical coupler device |
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| CN (1) | CN218782445U (en) |
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