CN108767643A - Laser emitter and its driving device, driving method and readable storage medium storing program for executing - Google Patents
Laser emitter and its driving device, driving method and readable storage medium storing program for executing Download PDFInfo
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- CN108767643A CN108767643A CN201810355708.7A CN201810355708A CN108767643A CN 108767643 A CN108767643 A CN 108767643A CN 201810355708 A CN201810355708 A CN 201810355708A CN 108767643 A CN108767643 A CN 108767643A
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- Prior art keywords
- laser emitter
- transparent electrode
- laser
- laser emission
- driving
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/06825—Protecting the laser, e.g. during switch-on/off, detection of malfunctioning or degradation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/10023—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by functional association of additional optical elements, e.g. filters, gratings, reflectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of laser emitters, include circuit unit and light diffusing sheet equipped with Laser emission chip, light-emitting surface of the incidence surface of the light diffusing sheet towards the Laser emission chip, the transparent electrode with its one is provided on the light-emitting surface of the light diffusing sheet, the transparent electrode is as a resistive element.Laser emitter introducing has preventing mechanism, when can falling off, be broken or damage in light diffusing sheet, blocks and shines, play a protective role to human eye.The present invention also provides a kind of driving device, driving method and the readable storage medium storing program for executing of above-mentioned laser emitter.
Description
Technical field
The present invention relates to 3D detection technologies more particularly to laser emitter and its driving device, driving method and readable deposit
Storage media.
Background technology
With the development of 3D detection technologies, 3D photographic devices start to be widely used on the mobile terminals such as mobile phone into pedestrian
Face identifies.The main devices of 3D photographic devices include laser emitter and Laser video camera head, wherein have one in laser emitter
Light diffusing sheet, for dissipating laser, expansion of laser light is to the coverage area of face, if light diffusing sheet falls off, is broken or damages
When bad, laser transmitter projects are that high-energy throughput laser concentration acts on face, can be damaged to human eye, therefore
It is necessary to human eye preventing mechanism is introduced in laser emitter.
Invention content
In order to solve above-mentioned the deficiencies in the prior art, the present invention provides a kind of laser emitter, and introducing has preventing mechanism, can
When light diffusing sheet falls off, is broken or damages, blocks and shine, play a protective role to human eye.
The present invention also provides a kind of driving device, driving method and the readable storage medium storing program for executing of above-mentioned laser emitter.
The technical problems to be solved by the invention are achieved by the following technical programs：
A kind of laser emitter, includes circuit unit and light diffusing sheet equipped with Laser emission chip, the light diffusing sheet
Incidence surface is provided on the light-emitting surface of the light diffusing sheet transparent with its one towards the light-emitting surface of the Laser emission chip
Electrode, the transparent electrode is as a resistive element.
Further, the anode in the transparent electrode and cathode are electrically connected with the circuit unit respectively.
Further, further include conducting terminal, one end of the conducting terminal is electrically connected with the transparent electrode, another
End is electrically connected with the circuit unit.
Further, the transparent electrode is transparent conductive film.
Further, further include the holder with light hole, the circuit unit and light diffusing sheet are separately positioned on described
On the light inputting end and light extraction end of holder, the Laser emission chip is located in the light hole.
A kind of driving device of laser emitter, including processor and the storage with processor electric connection respectively
Device and above-mentioned laser emitter, the computer program that the interior storage of the memory is executed for the processor, the processor
When executing the computer program, following steps are carried out：
Step 1：Obtain the electrical parameter of the transparent electrode；
Step 2：Whether within a preset range the electrical parameter obtained is judged, if so, driving the Laser emission chip light emitting
And step 1 and 2 is repeated, if it is not, not driving the Laser emission chip light emitting then.
Further, before step 1, further include：
Step 0：Obtain the driving instruction of the Laser emission chip light emitting.
A kind of driving method of laser emitter is used for above-mentioned laser emitter, includes the following steps：
Step 1：Obtain the electrical parameter of the transparent electrode；
Step 2：Whether within a preset range the electrical parameter obtained is judged, if so, driving the Laser emission chip light emitting
And step 1 and 2 is repeated, if it is not, not driving the Laser emission chip light emitting then.
Further, further include before step 1：
Step 0：Obtain the driving instruction of the Laser emission chip light emitting.
A kind of readable storage medium storing program for executing, stores the computer program executed for processor, and processor executes the computer
The driving method of above-mentioned laser emitter is carried out when program.
The present invention has the advantages that：The laser emitter is coated with one layer thoroughly on the incidence surface of the light diffusing sheet
Prescribed electrode, the transparent electrode are equivalent to a resistive element, when the light diffusing sheet falls off, is broken or damages situations such as
When, the resistance value of the transparent electrode also can accordingly change, and can thus pass through the resistance of the detection transparent electrode
Value changes to judge whether the light diffusing sheet damages, and to control shining for the Laser emission chip, preventing mechanism can
It plays a protective role to human eye.
Description of the drawings
Fig. 1 is the schematic diagram of laser emitter provided by the invention；
Fig. 2 is the detection circuit of the transparent electrode of laser emitter provided by the invention；
Fig. 3 is the functional block diagram of the driving device of laser emitter provided by the invention；
Fig. 4 is the step block diagram of the driving method of laser emitter provided by the invention.
Specific implementation mode
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of laser emitter, includes circuit unit and light diffusing sheet equipped with Laser emission chip 3
1, the light-emitting surface of the light diffusing sheet 1 towards the Laser emission chip 3 light-emitting surface, on the incidence surface of the light diffusing sheet 1
It is provided with the transparent electrode 2 with its one, the transparent electrode 2 is used as a resistive element.
The laser emitter is coated with layer of transparent electrode 2, the transparent electrode 2 on the incidence surface of the light diffusing sheet 1
It is equivalent to a resistive element, when the light diffusing sheet 1 falls off, is broken or damages, the electricity of the transparent electrode 2
Resistance value also can accordingly increase, and thus can judge that the light expands by detecting the electrical parameter variation of the transparent electrode 2
Whether discrete piece 1 is damaged, and is shone with controlling the Laser emission chip 3, preventing mechanism can play a protective role to human eye.
When in use, the anode and cathode in the transparent electrode 2 directly can electrically connect with processor each by FPC
It connects, can also be electrically connected by the circuit unit and processor.
Preferably, as in the present embodiment, the anode and cathode in the transparent electrode 2 are electrical with the circuit unit respectively
Connection.
The transparent electrode 2 and Laser emission chip 3 are electrically connected to external processor, place by the circuit unit
Device load constant voltage or constant current on the anode and cathode of the transparent electrode 2 are managed, when the resistance of the transparent electrode 2
When value increases with the damage of the light diffusing sheet 1, processor will read the variation of the electrical parameter of the transparent electrode 2
Value, is compared to judge whether the light diffusing sheet 1 damages with preset range, judges that the light expands if beyond preset range
Discrete piece 1 has been damaged, and the Laser emission chip 3 is not driven to shine.
The electrical parameter includes but not limited at least one of resistance value, current value and voltage value.
The transparent electrode 2 is preferably a transparent conductive film, optimal to be covered on the light diffusing sheet 1 for whole face
Ito thin film, between 10-150nm, face hinders between 0.2-1.5k Ω thickness；The anode and cathode of the transparent electrode 2 are preferred
Ground is arranged on its opposite both ends.The Laser emission chip 3 is preferably but not limited to as the infrared chips of VSCEL.
The laser emitter further includes the holder 7 for having light hole, and the circuit unit and light diffusing sheet 1 are separately positioned on
On the light inputting end and light extraction end of the holder 7, the Laser emission chip 3 is located in the light hole；And further include conduction
Terminal 8, the conducting terminal 8 are located at outside the holder 7, and one end and the transparent electrode 2 are electrically connected, the other end with it is described
Circuit unit is electrically connected.
Between the transparent electrode 2 and conducting terminal 8, and/or, between the circuit unit and conducting terminal 8, preferably but
It is not limited by conductive silver paste 9 or conductive glue connection conducting；Between the light diffusing sheet 1 and holder 7, and/or, the circuit group
Between part and holder 7, and/or, between the transparent electrode 2 and conducting terminal 8, and/or, the holder 7 and conducting terminal 8 it
Between, it is adhesively fixed by viscose 10.
The circuit unit includes ceramic substrate 4 and the upper surface circuit 5 being arranged on the ceramic substrate 4 and lower surface
Circuit 6 is connected between the upper surface circuit 5 and lower surface circuit 6 by the plated-through hole 11 in the ceramic substrate 4.
The underrun conductive silver glue or AuSn or other modes of the Laser emission chip 3 and the upper surface circuit 5
Cathode connection conducting, the anode binding that top surface periphery PAD passes through binding line 31 and the upper surface circuit 5 is connected.
The conducting terminal 8 specifically includes：
The anode of first terminal, one end and the transparent electrode 2 is electrically connected, and the other end and the upper surface circuit 5 are just
Pole is electrically connected；
The cathode of Second terminal, one end and the transparent electrode 2 is electrically connected, and the other end is negative with the upper surface circuit 5
Pole is electrically connected.
The first terminal and/or Second terminal are preferably but not limited to as electric circuit metal part or FPC.
The lower surface circuit 6 is electrically connected subsequently through tin cream welding manner and circuit board.
One end of detection circuit as shown in Figure 2, the transparent electrode 2 is electrically connected processor to obtain by the ports Vcc
Electric energy is supplied, and the other end is grounded by the ends GND, and adc circuit is electrically connected to 2 connection processing device of the transparent electrode by the ends ADC
One end on, to obtain the analog signal of the capacitance parameter of the transparent electrode 2, and convert analog signals into digital signal and carry
Supply processor is calculated and compared.
Certainly, the adc circuit can also use GPIO circuits to substitute.
Embodiment two
As shown in figure 3, a kind of driving device of laser emitter, including processor and it is electrically connected respectively with the processor
Memory and embodiment one described in laser emitter, the computer that storage is executed for the processor in the memory
Program, when the processor executes the computer program, as shown in figure 4, carrying out following steps：
Step 1：Obtain the electrical parameter of the transparent electrode 2；
Step 2：Whether within a preset range the electrical parameter obtained is judged, if so, the Laser emission chip 3 is driven to shine
And step 1 and 2 is repeated, if it is not, the Laser emission chip 3 is not driven then to shine.
The electrical parameter includes but not limited at least one of resistance value, current value and voltage value, if the processing
Device load is constant voltage in the transparent electrode 2, then the electrical parameter obtained in step 1 is current value or is foundation
Current value and calculated resistance value, if processor load is constant current, step 1 in the transparent electrode 2
The electrical parameter of middle acquisition is voltage value or is calculated resistance value according to voltage value.
The driving device detects the electrical ginseng of the transparent electrode 2 in real time during the use of the laser emitter
Number variation judges that the light diffusing sheet 1 does not damage if the electrical parameter obtained is without departing from preset range, continues to drive described sharp
Light emitting chip 3 shines, and judges that the light diffusing sheet 1 has damaged if the electrical parameter obtained is beyond preset range, stops at once
The Laser emission chip 3 is only driven to shine.
Also, the driving device also will be detected first described before calling every time and the laser emitter is driven to shine
The electrical parameter of transparent electrode 2 changes, and only just drives the Laser emission core in the case that the light diffusing sheet 1 is unspoiled
Piece 3 shines, then before step 1, further includes：
Step 0：Obtain the luminous driving instruction of the Laser emission chip 3.
Embodiment three
As shown in figure 4, a kind of driving method of laser emitter, for the laser emitter described in embodiment one, including such as
Lower step：
Step 1：Obtain the electrical parameter of the transparent electrode 2；
Step 2：Whether within a preset range the electrical parameter obtained is judged, if so, the Laser emission chip 3 is driven to shine
And step 1 and 2 is repeated, if it is not, the Laser emission chip 3 is not driven then to shine.
The electrical parameter includes but not limited at least one of resistance value, current value and voltage value, if load is in institute
It is constant voltage to state in transparent electrode 2, then the electrical parameter obtained in step 1 is current value or is counted for foundation current value
The resistance value of calculating, if load is constant current in the transparent electrode 2, the electrical parameter obtained in step 1 is electricity
Pressure value is the calculated resistance value according to voltage value.
The driving method detects the electrical ginseng of the transparent electrode 2 in real time during the use of the laser emitter
Number variation judges that the light diffusing sheet 1 does not damage if the electrical parameter obtained is without departing from preset range, continues to drive described sharp
Light emitting chip 3 shines, and judges that the light diffusing sheet 1 has damaged if the electrical parameter obtained is beyond preset range, stops at once
The Laser emission chip 3 is only driven to shine.
Also, the driving method also will be detected first described before calling every time and the laser emitter is driven to shine
The electrical parameter of transparent electrode 2 changes, and only just drives the Laser emission core in the case that the light diffusing sheet 1 is unspoiled
Piece 3 shines, then before step 1, further includes：
Step 0：Obtain the luminous driving instruction of the Laser emission chip 3.
Example IV
A kind of readable storage medium storing program for executing, stores the computer program executed for processor, and processor executes the computer program
The driving method of laser emitter described in Shi Jinhang embodiments three.
Embodiments of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but can not
Therefore it is interpreted as the limitation to the scope of the claims of the present invention, as long as skill obtained in the form of equivalent substitutions or equivalent transformations
Art scheme should all be fallen within the scope and spirit of the invention.
Claims (10)
1. a kind of laser emitter includes circuit unit and light diffusing sheet equipped with Laser emission chip, the light diffusing sheet
Incidence surface towards the Laser emission chip light-emitting surface, it is characterised in that：It is provided on the light-emitting surface of the light diffusing sheet
With the transparent electrode of its one, the transparent electrode is as a resistive element.
2. laser emitter according to claim 1, which is characterized in that the anode in the transparent electrode and cathode difference
It is electrically connected with the circuit unit.
3. laser emitter according to claim 2, which is characterized in that further include conducting terminal, the conducting terminal
One end is electrically connected with the transparent electrode, and the other end is electrically connected with the circuit unit.
4. according to any laser emitter in claim 1-3, which is characterized in that the transparent electrode is electrically conducting transparent
Film.
5. according to any laser emitter in claim 1-3, which is characterized in that further include the branch with light hole
Frame, the circuit unit and light diffusing sheet are separately positioned on the light inputting end and light extraction end of the holder, the Laser emission core
Piece is located in the light hole.
6. a kind of driving device of laser emitter, which is characterized in that including processor and electrical with the processor respectively
Any laser emitter in the memory and claim 1-5 of connection, the interior storage of the memory supply the processor
The computer program of execution when the processor executes the computer program, carries out following steps：
Step 1：Obtain the electrical parameter of the transparent electrode；
Step 2：Whether within a preset range the electrical parameter obtained is judged, if so, driving the Laser emission chip light emitting
And step 1 and 2 is repeated, if it is not, not driving the Laser emission chip light emitting then.
7. the driving device of laser emitter according to claim 6, which is characterized in that before step 1, further include：
Step 0：Obtain the driving instruction of the Laser emission chip light emitting.
8. a kind of driving method of laser emitter, which is characterized in that for any Laser emission in claim 1-5
Device includes the following steps：
Step 1：Obtain the electrical parameter of the transparent electrode；
Step 2：Whether within a preset range the electrical parameter obtained is judged, if so, driving the Laser emission chip light emitting
And step 1 and 2 is repeated, if it is not, not driving the Laser emission chip light emitting then.
9. the driving method of laser emitter according to claim 8, which is characterized in that further include before step 1：
Step 0：Obtain the driving instruction of the Laser emission chip light emitting.
10. a kind of readable storage medium storing program for executing stores the computer program executed for processor, which is characterized in that processor is held
The driving method of the laser emitter described in claim 8 or 9 is carried out when the row computer program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810355708.7A CN108767643A (en) | 2018-04-19 | 2018-04-19 | Laser emitter and its driving device, driving method and readable storage medium storing program for executing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810355708.7A CN108767643A (en) | 2018-04-19 | 2018-04-19 | Laser emitter and its driving device, driving method and readable storage medium storing program for executing |
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| CN108767643A true CN108767643A (en) | 2018-11-06 |
Family
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| CN201810355708.7A Pending CN108767643A (en) | 2018-04-19 | 2018-04-19 | Laser emitter and its driving device, driving method and readable storage medium storing program for executing |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020038776A1 (en) * | 2018-08-22 | 2020-02-27 | Osram Oled Gmbh | Optoelectronic device, and method for controlling an optoelectronic device |
| WO2020122815A1 (en) * | 2018-12-10 | 2020-06-18 | Ams Sensors Asia Pte. Ltd. | Light emitting module including enhanced eye-safety feature |
| CN111628403A (en) * | 2019-02-27 | 2020-09-04 | 富士施乐株式会社 | Light emitter, light emitting device, optical device, and information processing apparatus |
| WO2020177710A1 (en) * | 2019-03-07 | 2020-09-10 | 维沃移动通信有限公司 | Light module and mobile terminal |
| CN111917003A (en) * | 2019-05-07 | 2020-11-10 | 光宝光电(常州)有限公司 | Light source device |
| CN113196597A (en) * | 2018-12-17 | 2021-07-30 | ams国际有限公司 | Light emitting module including enhanced eye safety features |
| US20210336402A1 (en) * | 2020-04-23 | 2021-10-28 | Analog Devices International Unlimited Company | Laser system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020038776A1 (en) * | 2018-08-22 | 2020-02-27 | Osram Oled Gmbh | Optoelectronic device, and method for controlling an optoelectronic device |
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| US20210336402A1 (en) * | 2020-04-23 | 2021-10-28 | Analog Devices International Unlimited Company | Laser system |
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