CN2834098Y - Voltage divider against power surge on laser diode - Google Patents
Voltage divider against power surge on laser diode Download PDFInfo
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- CN2834098Y CN2834098Y CN 200520004164 CN200520004164U CN2834098Y CN 2834098 Y CN2834098 Y CN 2834098Y CN 200520004164 CN200520004164 CN 200520004164 CN 200520004164 U CN200520004164 U CN 200520004164U CN 2834098 Y CN2834098 Y CN 2834098Y
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- laser diode
- laser
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- diode
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Abstract
The utility model relates to a voltage dividing device for preventing power surge of a laser diode, which comprises a laser diode module, a laser drive element, a secondary voltage dividing resistor and a Zener diode, wherein the laser diode module comprises a laser diode used for receiving light sent out by a drive current; the laser diode module also comprises a laser diode used for receiving the light sent out by the laser diode so that light signals can be converted into electrical signals which are feedback to the laser diode module. Thus, a power self-balancing function is achieved. The laser drive element is used for outputting power generated by the laser diode. The Zener diode is used for stopping the laser drive element when short circuit occurs in the circuit so as to protect the laser diode module and stopping the laser diode from outputting the power so as to prevent output power surge, and thus, the abnormally intense light sent out by the laser diode is avoided so that users' eyes can not be hurt.
Description
Technical field
The utility model relates to a kind of bleeder mechanism that prevents that laser diode power from uprushing, and refers to a kind of like this bleeder mechanism especially, and it protects laser diode module with Zener diode under short-circuit condition, uprush to prevent laser diode power; And utilize the divider resistance be parallel to this Laser Driven element, in order to voltage distribution on each driving element, to prevent that the voltage on other driving element heightened suddenly and caused power output above standard when each element short circuit is lost efficacy.
Background technology
See also shown in Figure 1ly, it is the circuit diagram of known laser diode.By among the figure as can be known, when arbitrary element one has short-circuit condition in the device circuit, will make the control fails of this laser module, and cause the power output of this laser module to be uprushed, make it can't reach the standard of security regulations.
General known laser diode circuit has following shortcoming:
1, arbitrary element one has short-circuit condition in device circuit, just will make the control fails of this laser module, and causes the power output of this laser module to be uprushed;
2, when arbitrary element has short-circuit condition in the device circuit, the light that may cause this laser module to send is strong unusually, and causes injuring user's eyes.
Therefore, as from the foregoing, above-mentioned known laser diode circuit obviously has inconvenience and exists with shortcoming on reality is used, and remains to be improved.
Summary of the invention
A purpose of the present utility model provides a kind of bleeder mechanism that prevents that laser diode power from uprushing; when this device is under the short-circuit condition; utilize the fixed voltage on state characteristic of a Zener diode, with the protection laser diode module and prevent that this output power of laser diode from uprushing.
Another purpose of the present utility model provides a kind of bleeder mechanism that prevents that laser diode power from uprushing, its utilization is parallel to the divider resistance of this Laser Driven element, in order to voltage is allocated in respectively on each driving element, to prevent that the voltage on other driving element heightened suddenly and caused power output to surpass standard when the individual elements short circuit is lost efficacy.
In order to achieve the above object, the utility model provides a kind of bleeder mechanism that prevents that laser diode power from uprushing, include: a laser diode module, it comprises a laser diode (Laser Diode, LD), in order to receive a drive current to send light, this laser diode module also comprises an optical diode (Photo Diode, PD), it receives the light that this laser diode sends, so that light signal is converted to the signal of telecommunication, feed back to this laser diode module, in order to reach the self balancing effect of power; The Laser Driven element, in order to this laser diode is done power output, it is connected in this laser diode; Two divider resistances, it is parallel to this Laser Driven element, in order to distribute a certain proportion of voltage in each driving element; And a Zener diode (Zener Diode) and a two-carrier junction transistor (Bipolar JunctionTransistor; BJT); it is connected with this divider resistance; in order to when being short-circuited in the circuit; make this Laser Driven element of taboo (Disable); protecting this laser diode module, and block this laser diode power output and uprush to prevent power output.
According to the above-mentioned bleeder mechanism that laser diode power is uprushed that prevents, wherein, described Laser Driven element is to be formed by three two-carrier junction transistor serial connections.
According to the above-mentioned bleeder mechanism that laser diode power is uprushed that prevents, wherein, the Zener voltage of this Zener diode is 1.2 volts.
The utility model also provides a kind of bleeder mechanism that prevents that laser diode power from uprushing, include: a laser diode module, it comprises a laser diode, receive a drive current to send light, this laser diode module also comprises an optical diode, and it receives the light that this laser diode sends, so that light signal is converted to the signal of telecommunication, in order to this optical diode institute electrical signal converted is fed back to this laser diode module, to reach the effect of automated power balance; The Laser Driven element is connected in this laser diode; One divider resistance is parallel to described Laser Driven element, in order to distribute the voltage on each Laser Driven element; And a Zener diode, is connected with this divider resistance, in order to when be short-circuited in the circuit, make the described Laser Driven element of taboo, protecting this laser diode module, and the blocking laser diode power is exported.
According to the above-mentioned bleeder mechanism that laser diode power is uprushed that prevents, wherein, described Laser Driven element is to be formed by two two-carrier junction transistor serial connections.
According to the above-mentioned bleeder mechanism that laser diode power is uprushed that prevents, wherein, the Zener voltage of this Zener diode is 1.2 volts.
The utility model can be realized following beneficial effect:
1, provides a kind of bleeder mechanism that prevents that laser diode power from uprushing, when this device works under the short-circuit condition, utilize the voltage stabilizing on state characteristic of Zener diode, the protection laser diode module also prevents that the power output of this laser diode module from uprushing, with useful life that increases this laser diode module and the eyes that prevent to injure the user;
2, provide a kind of bleeder mechanism that prevents that laser diode power from uprushing, the divider resistance that its utilization is parallel to this Laser Driven element distributes the voltage of each Laser Driven element, cause power burst when preventing arbitrary driving element inefficacy short circuit, thereby reach safe power export-restriction.
In order further to illustrate the utility model is to reach technology, means and the effect that predetermined purpose is taked, and sees also following about detailed description of the present utility model and accompanying drawing.The purpose of this utility model, feature and characteristics can obtain deeply and specific description thus, yet accompanying drawing only provides reference and explanation usefulness, is not to be used for the utility model is limited.
Description of drawings
Fig. 1 is the circuit diagram of known laser diode;
Fig. 2 is the circuit diagram that the utility model prevents first embodiment of the bleeder mechanism that laser diode power is uprushed; And
Fig. 3 is the circuit diagram that the utility model prevents second embodiment of the bleeder mechanism that laser diode power is uprushed.
Wherein, description of reference numerals is as follows:
1 laser diode module, 11 laser diodes
12 optical diode D1 Zener diodes
Q2, Q3, Q4 Laser Driven element R3, R4 divider resistance
R1, R2 resistance R 5 feedback regulation resistance
Q1, Q5 two-carrier junction transistor 1 ' laser diode module
11 ' laser diode, 12 ' optical diode
D1 ' Zener diode Q2 ', Q3 ' Laser Driven element
R1 ' resistance R 2 ', R3 ' divider resistance
R4 ' feedback regulation resistance Q1 ', Q4 ' two-carrier junction transistor
The outside direct voltage GND of VCC earth point
Embodiment
See also shown in Figure 2ly, it prevents the circuit diagram of first embodiment of the bleeder mechanism that laser diode power is uprushed for the utility model.By among the figure as can be known, the utility model provides a kind of bleeder mechanism that prevents that laser diode power from uprushing, include a laser diode module 1, it comprises: a laser diode (Laser Diode, LD) 11, one optical diode (Photo Diode, PD) 12, Laser Driven element Q2, Q3, Q4, two divider resistance R3, R4, and a Zener diode (Zener Diode) D1.
This laser diode module 1 is by outside direct voltage drive, this laser diode 11 receives a drive current to send light, and this optical diode 12 receives the light that this laser diode 11 is sent, so that light signal is converted to the signal of telecommunication, feed back to this laser diode module 1, to reach the self balancing purpose of power.In addition, Laser Driven element Q2, Q3, Q4 are connected in this laser diode 11, and this divider resistance R3, R4 are parallel to Laser Driven element Q2, Q3, Q4, and the resistance of divider resistance R3, R4 is allocated the effect that reaches each Laser Driven element Q2, Q3, Q4 dividing potential drop in certain proportion.
And this Zener diode D1 and two-carrier junction transistor Q5 are connected with this divider resistance R3, R4; in order to when being short-circuited in the circuit; make taboo (Disable) Laser Driven element Q2, Q3, Q4; protecting this laser diode module 1, and block this laser diode power output and uprush to prevent power output.
Wherein Laser Driven element Q2, Q3, Q4 are that (BipolarJunction Transistor, BJT) serial connection forms by three two-carrier junction transistors.
In addition, this optical diode 12 is connected in the loop by a resistance R 1 and positive-negative-positive two-carrier junction transistor Q1 series connection, and connects a feedback regulation resistance R 5 to earth point; Wherein, this resistance R l other end is connected in this outside direct voltage.When the laser diode device circuit working under normal condition, this outside direct voltage directly drives this laser diode module 1, make this laser diode 11 receive a drive current to send light, and receive the light that these laser diodes 11 are sent by this optical diode 12, so that light signal is converted to the signal of telecommunication, to control positive-negative-positive two-carrier junction transistor Q1 and to feed back to this laser diode module 1, to reach the self balancing effect of power.In addition, this outside direct voltage drive is by the loop of this resistance R 1 and this positive-negative-positive two-carrier junction transistor Q1 series connection, and via a resistance R 2, connect this divider resistance R3, R4 and Laser Driven element Q2, Q3, the Q4 in parallel with this divider resistance R3, R4, utilize this divider resistance R3, R4 to be endowed the certain proportion resistance, and voltage is allocated in respectively on each Laser Driven element Q2, Q3, the Q4.
When laser diode module or positive-negative-positive two-carrier junction transistor Q1 work under the short-circuit condition; collector electrode (C) the side voltage of this positive-negative-positive two-carrier junction transistor Q1 is uprushed; puncture voltage (breakdown voltage) greater than this Zener diode D1; make this Zener diode D1 work; and then driving two-carrier junction transistor Q5 conducting; with so that prohibit Laser Driven element Q2, Q3, Q4, to protect this laser diode module 1 and to block this laser diode power output and uprush to prevent power output.
See also shown in Figure 3ly, it prevents the circuit diagram of second embodiment of the bleeder mechanism that laser diode power is uprushed for the utility model.By among the figure as can be known, the utility model provides a kind of bleeder mechanism that prevents that laser diode power from uprushing, include a laser diode module 1 ', it comprises: a laser diode 11 ', an optical diode 12 ', Laser Driven element Q2 ', Q3 ', and a Zener diode D1 '.
This laser diode module 1 ' is by outside direct voltage drive, this laser diode 11 ' receives a drive current to send light, and this optical diode 12 ' receives the light that this laser diode 11 ' sends, so that light signal is converted to the signal of telecommunication, control two-carrier junction transistor Q1 ' also feeds back to this laser diode module 1 ', to reach the self balancing effect of power.In addition, Laser Driven element Q2 ', Q3 ' are connected in this laser diode 11 ', and a resistance R 3 ' is parallel to this Laser Driven element Q2 ', Q3 ', and divider resistance R2 ', R3 ' given the certain proportion resistance, and voltage is allocated in respectively on each Laser Driven element Q2 ', Q3 '.
And this Zener diode D1 ' and two-carrier junction transistor Q4 ' are connected with this divider resistance R3 '; in order to when being short-circuited in the circuit; make and prohibit Laser Driven element Q2 ', Q3 ', to protect this laser diode module 1 ' and to block this laser diode power output and uprush to prevent power output.Wherein Laser Driven element Q2 ', Q3 ' are formed by two two-carrier junction transistor serial connections.
In addition, this optical diode 12 ' is connected in the loop by a resistance R 1 ' and a positive-negative-positive two-carrier junction transistor Q1 ' series connection, and connects a feedback regulation resistance R 4 ' to earth point; Wherein, this resistance R 1 ' other end is connected in this outside direct voltage.When the laser diode device circuit working under normal condition, this outside direct voltage directly drives this laser diode module 1 ', make this laser diode 11 ' receive a drive current to send light, and receive the light that this laser diode 11 ' sends by this optical diode 12 ', so that light signal is converted to the signal of telecommunication, with control two-carrier junction transistor Q1 ', thereby reach the self balancing effect of power.In addition, this outside direct voltage drive is by the loop of this resistance R 1 ' and a positive-negative-positive two-carrier junction transistor Q1 ' series connection, and, connect this divider resistance R3 ' and Laser Driven element Q2 ', the Q3 ' in parallel with this divider resistance R3 ' via a divider resistance R2 '.
When laser diode module or two-carrier junction transistor Q1 ' work under the short-circuit condition; collector electrode (C) the side voltage of this positive-negative-positive two-carrier junction transistor Q1 ' is uprushed; puncture voltage greater than this Zener diode D1 '; make this Zener diode D1 ' work; and then driving two-carrier junction transistor Q4 ' conducting; with so that prohibit Laser Driven element Q2 ', Q3 ', to protect this laser diode module 1 '.
See also shown in following table 1 and table 2, it is respectively first embodiment of the bleeder mechanism that the utility model prevents that laser diode power from uprushing and the short-circuit test result data table of second embodiment.
| Test voltage: | DC 3.0V |
| Unit: mW | |
| Set value of the power | 0.8 |
| The R1 short circuit | 0.84 |
| The R2 short circuit | 0.79 |
| The R3 short circuit | 0.16 |
| The R4 short circuit | 0.03 |
| The R5 short circuit | 0 |
| Q1 (C-E short circuit) | 0 |
| Q1 (C-B short circuit) | 0 |
| Q1 (E-B short circuit) | 0 |
| Q2 (C-E short circuit) | 0.84 |
| Q2 (C-B short circuit) | 0 |
| Q2 (E-B short circuit) | 0 |
| Q3 (C-E short circuit) | 0.82 |
| Q3 (C-B short circuit) | 0 |
| Q3 (E-B short circuit) | 0 |
| Q4 (C-E short circuit) | 0.8 |
| Q4 (C-B short circuit) | 0 |
| Q4 (E-B short circuit) | 0 |
| Q5 (C-E short circuit) | 0 |
| Q5 (C-B short circuit) | 0 |
| Q5 (E-B short circuit) | 0.8 |
| The D1 short circuit | 0 |
| The LD-PD short circuit | 0 |
| The LD-VCC short circuit | 0 |
| The PD-VCC short circuit | 0 |
| Test voltage: | DC 3.0V |
| Unit: mW | |
| Set value of the power | 0.8 |
| R1 ' short circuit | 0.86 |
| R2 ' short circuit | 0.78 |
| R3 ' short circuit | 0.03 |
| R4 ' short circuit | 0 |
| Q1 ' (C-E short circuit) | 0 |
| Q1 ' (C-B short circuit) | 0 |
| Q1 ' (E-B short circuit) | 0 |
| Q2 ' (C-E short circuit) | 0.88 |
| Q2 ' (C-B short circuit) | 0 |
| Q2 ' (E-B short circuit) | 0 |
| Q3 ' (C-E short circuit) | 0.82 |
| Q3 ' (C-B short circuit) | 0 |
| Q3 ' (E-B short circuit) | 0 |
| Q4 ' (C-E short circuit) | 0 |
| Q4 ' (C-B short circuit) | 0 |
| Q4 ' (E-B short circuit) | 0.8 |
| D1 ' short circuit | 0 |
| The LD-PD short circuit | 0 |
| The LD-VCC short circuit | 0 |
| The PD-VCC short circuit | 0 |
Table 1 table 2
Wherein, indicate the C-E short circuit in table 1, the table 2, be meant a certain transistorized collector electrode and emission intereelectrode short-circuit; Indicate the C-B short circuit in table 1, the table 2, be meant short circuit between a certain transistorized collector electrode and base stage; In like manner can push away the implication of other sign.By table 1, table 2 as can be known, this device short-circuit test adds test voltage (outside direct voltage VCC) and is 3 volts of direct currents, and each short dot is given short circuit, measures the power output of this laser diode module 1 or this laser diode module 1 '.Because the overvoltage protection of this Zener diode D1 or this Zener diode D1 '; make the power output of this laser diode module 1 or this laser diode module 1 ' be limited in below the security regulations standard value, perhaps directly make and prohibit this laser diode module 1 or this laser diode module 1 '.
In sum, the utlity model has following advantage:
1, the utility model provides a kind of bleeder mechanism that prevents that laser diode power from uprushing, when this device works under the short-circuit condition, utilize the voltage stabilizing on state characteristic of a Zener diode, with the protection laser diode module and prevent that the power output of this laser diode module from uprushing, with useful life that increases this laser diode module and the eyes that prevent to injure the user;
2, the utility model provides a kind of bleeder mechanism that prevents that laser diode power from uprushing, its utilization is parallel to the divider resistance of this Laser Driven element, in order to distribute the voltage of each Laser Driven element, cause power burst when preventing arbitrary driving element inefficacy short circuit, to reach safe power export-restriction.
The above only be the detailed description of the utility model preferred embodiment, but feature of the present utility model is not limited thereto.The above is not that claim of the present utility model should be as the criterion with the scope of appended claim in order to restriction the utility model.All closing in the embodiment of spirit of the present utility model variation similar with it, all should be contained in the category of the present utility model, those skilled in the art in field of the present utility model, can think easily and variation or modify all can be encompassed within the claim of the present utility model.
Claims (6)
1, a kind of bleeder mechanism that prevents that laser diode power from uprushing is characterized in that, includes:
One laser diode module, it comprises:
One laser diode receives a drive current to send light; And
One optical diode receives the light that this laser diode sends, and light signal is converted to the signal of telecommunication, again institute's electrical signal converted is fed back to this laser diode module;
The Laser Driven element is connected in this laser diode;
Two divider resistances are parallel to described Laser Driven element; And
One Zener diode is connected with this divider resistance.
2, the bleeder mechanism that prevents that laser diode power from uprushing as claimed in claim 1 is characterized in that, described Laser Driven element is to be formed by three two-carrier junction transistor serial connections.
3, the bleeder mechanism that prevents that laser diode power from uprushing as claimed in claim 1 is characterized in that, the Zener voltage of this Zener diode is 1.2 volts.
4, a kind of bleeder mechanism that prevents that laser diode power from uprushing is characterized in that, includes:
One laser diode module, it comprises:
One laser diode receives a drive current to send light; And
One optical diode receives the light that this laser diode sends, and light signal is converted to the signal of telecommunication, again institute's electrical signal converted is fed back to this laser diode module;
The Laser Driven element is connected in this laser diode;
One divider resistance is parallel to described Laser Driven element; And
One Zener diode is connected with this divider resistance.
5, the bleeder mechanism that prevents that laser diode power from uprushing as claimed in claim 4 is characterized in that, described Laser Driven element is to be formed by two two-carrier junction transistor serial connections.
6, the bleeder mechanism that prevents that laser diode power from uprushing as claimed in claim 4 is characterized in that, the Zener voltage of this Zener diode is 1.2 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520004164 CN2834098Y (en) | 2005-03-18 | 2005-03-18 | Voltage divider against power surge on laser diode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520004164 CN2834098Y (en) | 2005-03-18 | 2005-03-18 | Voltage divider against power surge on laser diode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2834098Y true CN2834098Y (en) | 2006-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520004164 Expired - Lifetime CN2834098Y (en) | 2005-03-18 | 2005-03-18 | Voltage divider against power surge on laser diode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2834098Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872578A (en) * | 2014-03-25 | 2014-06-18 | 成都国科海博信息技术股份有限公司 | Constant-power driving circuit |
| CN108496093A (en) * | 2017-03-29 | 2018-09-04 | 深圳市大疆创新科技有限公司 | Laser pulse emission device, laser measuring device for measuring and mobile platform |
| CN109286126A (en) * | 2018-11-29 | 2019-01-29 | Oppo广东移动通信有限公司 | Output control method and electronic equipment, the computer readable storage medium of laser |
| US10539663B2 (en) | 2017-03-29 | 2020-01-21 | SZ DJI Technology Co., Ltd. | Light detecting and ranging (LIDAR) signal processing circuitry |
-
2005
- 2005-03-18 CN CN 200520004164 patent/CN2834098Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872578A (en) * | 2014-03-25 | 2014-06-18 | 成都国科海博信息技术股份有限公司 | Constant-power driving circuit |
| CN108496093A (en) * | 2017-03-29 | 2018-09-04 | 深圳市大疆创新科技有限公司 | Laser pulse emission device, laser measuring device for measuring and mobile platform |
| WO2018176286A1 (en) * | 2017-03-29 | 2018-10-04 | 深圳市大疆创新科技有限公司 | Laser pulse transmission device, laser measurement device, and mobile platform |
| US10539663B2 (en) | 2017-03-29 | 2020-01-21 | SZ DJI Technology Co., Ltd. | Light detecting and ranging (LIDAR) signal processing circuitry |
| CN109286126A (en) * | 2018-11-29 | 2019-01-29 | Oppo广东移动通信有限公司 | Output control method and electronic equipment, the computer readable storage medium of laser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150318 Granted publication date: 20061101 |