CN102915656A - Laser pointer capable of automatically adjusting light intensity - Google Patents
Laser pointer capable of automatically adjusting light intensity Download PDFInfo
- Publication number
- CN102915656A CN102915656A CN2011102181898A CN201110218189A CN102915656A CN 102915656 A CN102915656 A CN 102915656A CN 2011102181898 A CN2011102181898 A CN 2011102181898A CN 201110218189 A CN201110218189 A CN 201110218189A CN 102915656 A CN102915656 A CN 102915656A
- Authority
- CN
- China
- Prior art keywords
- laser
- laser designator
- microcontroller
- driving voltage
- photosensing units
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to a laser pointer capable of automatically adjusting light intensity. The laser pointer comprises a laser light emitting unit, a microcontroller and a light sensing circuit. The laser light emitting unit is used for generating laser, the light sensing circuit is used for sensing brightness of an ambient light, and the microcontroller is used for detecting terminal voltage of a light sensing element of the light sensing circuit. When the terminal voltage is lower than a critical value, the microcontroller provides first drive voltage for the laser light emitting unit, and when the terminal voltage is higher than the critical value, the microcontroller provides second drive voltage for the laser light emitting unit. The laser pointer is capable of automatically adjusting laser light intensity along with the ambient light and has power-saving effect.
Description
Technical field
The invention relates to a kind of laser designator, especially a kind of laser designator with the strong and weak function of automatic adjustment light.
Background technology
In the occasion of general company's meeting bulletin, laser designator is a kind of common bulletin servicing unit, user usually Ear Mucosa Treated by He Ne Laser Irradiation that laser designator is emitted with the instrument as the aid illustration bulletin, further reaches the effect that makes the participant note the emphasis of bulletin on bulletin.
Existing laser designator mainly is to utilize a collimation chip with laser alignment, and make laser be penetrated by a circular exit wound of bullet, therefore the common emitted laser spot of laser designator mostly is circular, certainly, other difform exit wound of bullet is also arranged, so that laser spot is changed to difformity.
Common laser pointer applications is in laser pen or (for example: mouse), for user's convenient for collecting and use, please refer to Fig. 1, it is the schematic diagram of existing laser stylus in input media.
Shown in graphic, laser stylus 1 mainly is by housing 11, protecgulum 12, bonnet 13 and a circuit board 14 form with mercury battery 15 structure of organizing, wherein, circuit board 14 is arranged in the housing 11, its front end is connected with a lasing fluorescence body 16 of supporting protecgulum 12, the rear end then is connected with the Compress Spring 17 that can support mercury battery 15, the upper end also is connected with a keyswitch 18, when user's started by press keyswitch 18, preinstalled circuit on the circuit board 14 consists of path, and make the lasing fluorescence body 16 of circuit board 14 front ends give off laser beam, and when the user decontrols keyswitch 18, then the preinstalled circuit on its circuit board 14 just forms and opens circuit, and the electric current whole preinstalled circuit of can't flowing through is therefore the lasing fluorescence body can't be luminous.
For cooperating the space of laser pen or input media, the power supply method of supplying that existing laser designator adopts is utilized little but the mercury battery power supply that electric power storage power is weak of volume mostly, therefore when the user uses laser designator, often power shortage can occur and the situation of needs replacing mercury battery; Moreover, no matter which kind of environment light source is existing laser designator be under, its lasing fluorescence body all can be exported identical luminous power, that is send light with brightness, but under dim environment, the lasing fluorescence body only need to be exported lower-wattage and just can make the clear place of seeing laser spot of participant in fact, therefore, need to a kind ofly can change the laser beam power to reach the laser designator of power saving purpose with environment light source.
Summary of the invention
The technical problem to be solved in the present invention is, for the prior art above shortcomings, provides a kind of laser designator that can automatically adjust with environment light source the laser beam power.
Another technical matters that the present invention will solve is, for the prior art above shortcomings, provides a kind of laser designator of power saving.
The technical solution adopted for the present invention to solve the technical problems provides a kind of laser designator of automatic adjustment light power, and it comprises lasing fluorescence unit, microcontroller and light sensing circuit, and this lasing fluorescence unit is in order to produce laser; This microcontroller is electrically connected this lasing fluorescence unit; This light sensing circuit is electrically connected this microcontroller and comprises Photosensing Units; Wherein, the brightness of this Photosensing Units sensing one environment light source, this microcontroller is detected a terminal voltage of this Photosensing Units of this light sensing circuit, when this terminal voltage is lower than a critical value, this microcontroller provides this lasing fluorescence unit the first driving voltage, when this terminal voltage was higher than this critical value, this microcontroller provided this lasing fluorescence unit the second driving voltage.
Preferably, the pulse bandwidth of this first driving voltage is different from the pulse bandwidth of this second driving voltage.
Preferably, this light sensing circuit also comprises power end and the resistance that is electrically connected this power end; One end of this Photosensing Units is serially connected with this resistance.
Preferably, this microcontroller is detected this terminal voltage that this Photosensing Units is serially connected with this end of this resistance.
Preferably, this Photosensing Units is photoresistance.
Preferably, the pulse bandwidth of this second driving voltage is greater than the pulse bandwidth of this first driving voltage.
Preferably, this Photosensing Units is light sensitive diode.
Preferably, the pulse bandwidth of this second driving voltage is less than the pulse bandwidth of this first driving voltage.
Preferably, the laser pointer applications of described automatic adjustment light power is in pointer.
Laser designator of the present invention is by the Photosensing Units of light sensing circuit and the setting of microcontroller, so that microcontroller can be according to the sensing of Photosensing Units to the brightness of environment light source, provide the lasing fluorescence unit different driving voltages, reach the purpose of automatic adjustment laser beam power and power saving.
Description of drawings
Fig. 1 is the schematic diagram of existing laser stylus.
Fig. 2 is the circuit diagram that the present invention adjusts laser designator one preferred embodiment of light power automatically.
Fig. 3 is the waveform schematic diagram of the first driving voltage of the present invention's laser designator one preferred embodiment of automatically adjusting the light power.
Fig. 4 is the waveform schematic diagram of the second driving voltage of the present invention's laser designator one preferred embodiment of automatically adjusting the light power.
Fig. 5 is the circuit diagram that the present invention adjusts another preferred embodiment of laser designator of light power automatically.
Fig. 6 is the waveform schematic diagram of the 3rd driving voltage of the present invention's another preferred embodiment of laser designator of automatically adjusting the light power.
Fig. 7 is the waveform schematic diagram of the moving voltage of 4 wheel driven of the present invention's another preferred embodiment of laser designator of automatically adjusting the light power.
Embodiment
See also Fig. 2, it adjusts the circuit diagram of laser designator one preferred embodiment of light power automatically for the present invention.Laser designator 2 comprises a lasing fluorescence unit 21, a microcontroller 22 and a light sensing circuit 23.Lasing fluorescence unit 21 is in order to produce laser, and in this preferred embodiment, lasing fluorescence unit 21 is a lasing fluorescence diode.Lasing fluorescence unit 21 and light sensing circuit 23 are electrically connected respectively one first control port 221 and one second control port 222 of microcontroller 22.Wherein, light sensing circuit 23 comprises a power end 231, a resistance 232 and a Photosensing Units 233, resistance 232 electric connection of power supply ends 231, one end 2331 of Photosensing Units 233 is serially connected with resistance 232 and the second control port 222, and Photosensing Units 233 is in order to the brightness of this environment light source of sensing.
In this preferred embodiment, Photosensing Units 233 is general known photoresistance, and the resistance value of photoresistance is to change with intensity of illumination, that is when intensity of illumination is stronger, then the resistance value of photoresistance is less, otherwise more weak when intensity of illumination, then the resistance value of photoresistance is larger.
Below describe the type of drive of laser designator of the present invention in detail, the explanation mode will illustrate respectively with surround lighting source strength and weak two kinds of situations.When the user when bright place utilizes laser designator 2 of the present invention, that is to say, when the user when laser designator 2 of the present invention is used in the stronger place of environment light source, because this moment, the resistance value of Photosensing Units 233 was less, therefore it is step-down that the second control port 222 of microcontroller 22 detects the terminal voltage (terminal voltage) of an end 2331 of Photosensing Units 233, when the intensity of environment light source made the terminal voltage of an end 2331 of Photosensing Units 233 be lower than a critical value, microcontroller 22 provided the lasing fluorescence unit 21 first driving voltage V1 through the first control port 221.See also Fig. 3, it adjusts the waveform schematic diagram of the first driving voltage V1 of laser designator one preferred embodiment of light power automatically for the present invention, and wherein, the transverse axis of Fig. 3 is the time, and the longitudinal axis is voltage.
Then, when if the user uses laser designator 2 of the present invention in the place of environment light source weak (dim), at this moment, it is large that Photosensing Units 233 resistance values become, therefore the second control port 222 of microcontroller 22 detects the terminal voltage of an end 2331 of Photosensing Units 233 and namely uprises, when the intensity of environment light source makes the terminal voltage of an end 2331 of Photosensing Units 233 be higher than critical value, microcontroller 22 provides the lasing fluorescence unit 21 second driving voltage V2 through the first control port 221, as shown in Figure 4, it adjusts the waveform schematic diagram of the second driving voltage V2 of laser designator one preferred embodiment of light power automatically for the present invention.
See also Fig. 3, Fig. 4, what need special instruction is, the pulse bandwidth W1 of this first driving voltage V1 is not identical with the pulse bandwidth W2 of this second driving voltage V2, in this preferred embodiment, the pulse bandwidth W2 of the second driving voltage V2 is greater than the pulse bandwidth W1 of the first driving voltage V1, that is to say, when the user when laser designator 2 of the present invention is used in the stronger place of environment light source, lasing fluorescence unit 21 receives the first driving voltage V1, at this moment, because the pulse bandwidth W1 of the first driving voltage V1 is narrower, that is, because the pulse wave frequency of the first driving voltage V1 that lasing fluorescence unit 21 received from microcontroller 22 within the unit interval is higher, therefore the output power of lasing fluorescence unit 21 is higher, therefore, the brightness of the laser that laser designator 2 is sent is stronger, thus, even in the situation that environment light source is stronger, laser designator 2 emitted laser spots still can clearly be seen.
And when the user when laser designator 2 of the present invention is used in the weak place of environment light source, lasing fluorescence unit 21 receives the second driving voltage V2, at this moment, because the pulse bandwidth W2 of the second driving voltage V2 is wider, that is, because the pulse wave frequency of the second driving voltage V2 that lasing fluorescence unit 21 received from microcontroller 22 within the unit interval is lower, therefore the output power of lasing fluorescence unit 21 is lower, and a little less than the brightness of the laser that laser designator 2 is sent, but owing to be to use laser designator 2 of the present invention in the weak place of environment light source, therefore laser designator 2 emitted laser spots still can clearly be seen.And, because the output power of lasing fluorescence unit 21 is lower, so the time can reach the effect of power saving.
See also Fig. 5, it adjusts the circuit diagram of another preferred embodiment of laser designator of light power automatically for the present invention.Light sensing circuit 33 in the present embodiment comprises a power end 331, a resistance 332 and a Photosensing Units 334, resistance 332 electric connection of power supply ends 331, one end 3341 of Photosensing Units 334 is serially connected with resistance 332 and the second control port 322, and Photosensing Units 334 is in order to the brightness of this environment light source of sensing.
The electric circuit constitute and above-described embodiment of the present embodiment are roughly the same, and difference is, in this preferred embodiment, Photosensing Units 334 is general known light sensitive diode, when light sensitive diode surpasses an intensity in intensity of illumination, present conducting state, this intensity is different according to the difference of light sensitive diode, if but, intensity of illumination does not surpass this intensity, then light sensitive diode presents a cut-off state, namely opens circuit.
Below describe the type of drive of the laser designator of the present embodiment in detail, the explanation mode also will illustrate respectively with surround lighting source strength and weak two kinds of situations, when the user when laser designator 3 of the present invention is used in the stronger place of environment light source, therefore this moment, Photosensing Units 334 was subjected to strong illumination to present a conducting state, and the two ends of Photosensing Units 334 have voltage difference, the terminal voltage that the second control port 322 of microcontroller 32 can detect an end 3341 of Photosensing Units 334 is higher than a critical value, when the terminal voltage of an end 3341 of Photosensing Units 334 is higher than critical value, microcontroller 32 provides lasing fluorescence unit 31 the 3rd driving voltage V3 through the first control port 321, see also Fig. 6, it adjusts the waveform schematic diagram of the 3rd driving voltage of another preferred embodiment of laser designator of light power automatically for the present invention, wherein, the transverse axis of Fig. 6 is the time, and the longitudinal axis is voltage.
Moreover, if the user uses laser designator 2 of the present invention in the place of weak (dim) in environment light source, at this moment, Photosensing Units 334 presents a cut-off state, and detecting the terminal voltage of an end 3341 of Photosensing Units 334, the second control port 322 that causes microcontroller 32 is lower than critical value, when the terminal voltage of an end 3341 of Photosensing Units 334 is lower than critical value, microcontroller 32 provides lasing fluorescence unit 31 4 wheel drivens to move voltage V4 through the first control port 321, as shown in Figure 7, its 4 wheel driven of automatically adjusting another preferred embodiment of laser designator of light power for the present invention moves the waveform schematic diagram of voltage.
See also Fig. 6, Fig. 7, what need special instruction is, in this preferred embodiment, the pulse bandwidth W4 of the moving voltage V4 of 4 wheel driven is greater than the pulse bandwidth W3 of the 3rd driving voltage V3, that is to say, when the user when laser designator 3 of the present invention is used in the stronger place of environment light source, lasing fluorescence unit 31 receives the 3rd driving voltage V3, at this moment, because the pulse bandwidth W3 of the 3rd driving voltage V3 is narrower, that is, because the pulse wave frequency of the 3rd driving voltage V3 that lasing fluorescence unit 31 received from microcontroller 32 within the unit interval is higher, therefore the output power of lasing fluorescence unit 31 is higher, and the brightness of the laser that laser designator 3 is sent is stronger, thus, even in the situation that environment light source is stronger, laser designator 3 emitted laser spots still can clearly be seen.
And when the user when laser designator 3 of the present invention is used in the weak place of environment light source, lasing fluorescence unit 31 receives the moving voltage V4 of 4 wheel driven, at this moment, because the pulse bandwidth W4 of the moving voltage V4 of 4 wheel driven is wider, that is, because the pulse wave frequency of the moving voltage V4 of 4 wheel driven that lasing fluorescence unit 31 received from microcontroller 32 within the unit interval is lower, therefore the output power of lasing fluorescence unit 31 is lower, and a little less than the brightness of the laser that laser designator 3 is sent, but because the user uses laser designator 3 of the present invention in the place of weak (dim) at environment light source, therefore laser designator 3 emitted laser spots still can be seen significantly, moreover, owing to the output power of lasing fluorescence unit 31 intensity in response to environment light source reduces, therefore can reach the effect of power saving.
Supplementary notes, the laser designator of automatic adjustment light power of the present invention can be used and (for example: mouse) be arranged at laser pen, pointer or other input media, it is noted that, but the Photosensing Units of laser designator of the present invention need be arranged at the position of sensitive context light source.
Comprehensive the above, laser designator of the present invention can by the setting of Photosensing Units and the microcontroller of light sensing circuit, reach the purpose of automatic adjustment laser beam power and power saving really.
The above is preferred embodiment of the present invention only, is not to limit claim scope of the present invention, and therefore all other do not break away from the equivalence change of finishing under the disclosed spirit or modify, and all should be contained in the scope of the present invention.
Claims (9)
1. a laser designator of automatically adjusting the light power is characterized in that, comprising:
The lasing fluorescence unit is in order to produce laser;
Microcontroller is electrically connected this lasing fluorescence unit; And
Light sensing circuit is electrically connected this microcontroller and comprises Photosensing Units; Wherein, the brightness of this Photosensing Units sensing one environment light source, this microcontroller is detected a terminal voltage of this Photosensing Units of this light sensing circuit, when this terminal voltage is lower than a critical value, this microcontroller provides this lasing fluorescence unit the first driving voltage, when this terminal voltage was higher than this critical value, this microcontroller provided this lasing fluorescence unit the second driving voltage.
2. the laser designator of automatic adjustment light power as claimed in claim 1 is characterized in that, the pulse bandwidth of this first driving voltage is different from the pulse bandwidth of this second driving voltage.
3. the laser designator of automatic adjustment light power as claimed in claim 1 is characterized in that, this light sensing circuit also comprises power end and the resistance that is electrically connected this power end; One end of this Photosensing Units is serially connected with this resistance.
4. the laser designator of automatic adjustment light power as claimed in claim 3 is characterized in that, this microcontroller is detected this terminal voltage that this Photosensing Units is serially connected with this end of this resistance.
5. the laser designator of automatic adjustment light power as claimed in claim 3 is characterized in that, this Photosensing Units is photoresistance.
6. the laser designator of automatic adjustment light power as claimed in claim 5 is characterized in that, the pulse bandwidth of this second driving voltage is greater than the pulse bandwidth of this first driving voltage.
7. the laser designator of automatic adjustment light power as claimed in claim 3 is characterized in that, this Photosensing Units is light sensitive diode.
8. the laser designator of automatic adjustment light power as claimed in claim 7 is characterized in that, the pulse bandwidth of this second driving voltage is less than the pulse bandwidth of this first driving voltage.
9. the laser designator of automatic adjustment light power as claimed in claim 1 is characterized in that, is applied in the pointer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102181898A CN102915656A (en) | 2011-08-01 | 2011-08-01 | Laser pointer capable of automatically adjusting light intensity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102181898A CN102915656A (en) | 2011-08-01 | 2011-08-01 | Laser pointer capable of automatically adjusting light intensity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102915656A true CN102915656A (en) | 2013-02-06 |
Family
ID=47613999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102181898A Pending CN102915656A (en) | 2011-08-01 | 2011-08-01 | Laser pointer capable of automatically adjusting light intensity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102915656A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956085A (en) * | 2014-04-04 | 2014-07-30 | 深圳市福田区青少年科技教育协会 | Remote control positioning pointer |
| CN107284348A (en) * | 2017-07-05 | 2017-10-24 | 武汉市技领科技有限公司 | Automatic light-supplementing method and system for Car license recognition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713620A (en) * | 2008-10-06 | 2010-05-26 | 亚洲光学股份有限公司 | System capable of automatically adjusting brightness and sighting device |
| CN201877020U (en) * | 2010-08-12 | 2011-06-22 | 青岛镭创光电技术有限公司 | Green light laser indication pen capable of adjusting brightness |
-
2011
- 2011-08-01 CN CN2011102181898A patent/CN102915656A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713620A (en) * | 2008-10-06 | 2010-05-26 | 亚洲光学股份有限公司 | System capable of automatically adjusting brightness and sighting device |
| CN201877020U (en) * | 2010-08-12 | 2011-06-22 | 青岛镭创光电技术有限公司 | Green light laser indication pen capable of adjusting brightness |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956085A (en) * | 2014-04-04 | 2014-07-30 | 深圳市福田区青少年科技教育协会 | Remote control positioning pointer |
| CN107284348A (en) * | 2017-07-05 | 2017-10-24 | 武汉市技领科技有限公司 | Automatic light-supplementing method and system for Car license recognition |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201667742U (en) | LED backlight driving device of light emitting diode and liquid crystal display | |
| US8106596B2 (en) | Light source driving circuit | |
| CN102264175A (en) | Light emitting diode lamp dimming device capable of realizing stepped dimming | |
| CN102915656A (en) | Laser pointer capable of automatically adjusting light intensity | |
| CN101599252A (en) | Circuit of display driving | |
| CN105430830A (en) | LED controller and method thereof | |
| CN100489949C (en) | Driving device for light-emitting diode serial | |
| CN104684130B (en) | Card-type LED driver and transportation vehicle with same | |
| CN201975048U (en) | Driving control device of large LED screen | |
| CN201577223U (en) | LED driving circuit and display unit with same | |
| CN201772300U (en) | Dimming LED lamp | |
| CN104684191A (en) | LED (Light-Emitting Diode) constant-current drive circuit, backlight driving device and backlight illumination system | |
| CN104427686A (en) | Lamp and control circuit thereof | |
| CN201047522Y (en) | Circuit structure of LED illuminating device | |
| CN104284490A (en) | LED drive circuit and refrigerator | |
| CN102625547A (en) | Dimming signal interface circuit | |
| CN102026451B (en) | Dimmable light-emitting diode (LED) driving power supply | |
| CN201531764U (en) | LED lamp tube | |
| CN201267029Y (en) | LED street lamp and drive device thereof | |
| CN201772298U (en) | Constant current and constant voltage LED illuminating lamp | |
| CN101308623B (en) | Liquid crystal display, back light device and driving method thereof | |
| CN204180342U (en) | LED drive circuit and refrigerator | |
| CN203027553U (en) | Electronic flash system for vehicle | |
| CN102223180B (en) | Optical module with low power consumption and realizing method thereof | |
| CN220106005U (en) | Display backlight control circuit, circuit board, display screen and television |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130206 |