CN102665320B - Portable electric appts and flash control circuit thereof - Google Patents
Portable electric appts and flash control circuit thereof Download PDFInfo
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- CN102665320B CN102665320B CN201210079540.4A CN201210079540A CN102665320B CN 102665320 B CN102665320 B CN 102665320B CN 201210079540 A CN201210079540 A CN 201210079540A CN 102665320 B CN102665320 B CN 102665320B
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Abstract
The invention discloses a kind of portable electric appts and flash control circuit thereof.This equipment comprises: power supply, energy-storage units, luminescence unit, the first electronic switch unit, mechanical switch unit and equipment body circuit; The output of power supply connects the power input of energy-storage units, and the output of energy-storage units connects luminescence unit; The first end of the first electronic switch unit, the second end and control end connect the Enable Pin of energy-storage units, the output of power supply and equipment body circuit respectively; The first end of mechanical switch unit connects the control end of electronic switch unit, and the second end of mechanical switch unit connects reference voltage; When mechanically making the first end of mechanical switch unit be communicated with the second end, reference voltage triggers the first electronic switch unit conducting, the Enable Pin of energy-storage units is enabled and then makes luminescence unit luminous.By the way, luminescence unit, when electronic equipment is in shutdown, can be used as the function of flashlight by the present invention.
Description
Technical field
The present invention relates to electronic device field, particularly relate to a kind of portable electric appts and flash control circuit thereof.
Background technology
Portable mobile phone along with mobile communication technology in recent years development and make rapid progress.With mobile phone, current mobile phone has been that people's routine work is lived essential electronic product, and its function is also more and more perfect.
Nowadays, when Cell Phone Design, especially in the Cell Phone Design being furnished with high-pixel camera head, the photoflash lamp for taking pictures generally all is configured with.Wherein, photoflash lamp generally adopts light-emitting diode.But photoflash lamp can only compensate light when taking pictures usually, and all the other time photoflash lamps are generally in idle state, and utilization ratio is lower.
In prior art, some mobile phones are also used as photoflash lamp the function of flashlight, but under the design that current this mobile phone flashlight and flashlight share is all based on mobile phone open state, user needs to enter certain menu just can enter flashlight function, and cannot use under the off-mode of mobile phone, use flashlight function inconvenient to user like this.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of portable electric appts and flash control circuit thereof, under electronic equipment is in off-mode, can realize function luminescence unit being used as flashlight.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of portable electric appts, comprising: power supply, energy-storage units, luminescence unit, the first electronic switch unit, mechanical switch unit and equipment body circuit; Equipment body circuit comprises baseband chip, and baseband chip comprises GPIO pin; The output of power supply connects the power input of energy-storage units, and the output of energy-storage units connects luminescence unit; The Enable Pin of energy-storage units connects the first end of the first electronic switch unit, and the second end of the first electronic switch unit connects the output of power supply; Electronic equipment comprises the second electronic switch unit, and the first end of the second electronic switch unit connects the control end of the first switch element, the second end ground connection of the second electronic switch unit, and the control end of the second electronic switch unit connects GPIO pin; The first end of mechanical switch unit connects the control end of the first electronic switch unit, and the second end of mechanical switch unit connects reference voltage; Wherein, when mechanically making the first end of mechanical switch unit be communicated with the second end, reference voltage triggers the first electronic switch unit conducting, the Enable Pin of energy-storage units is enabled and then makes luminescence unit luminous.
Wherein, mechanical switch unit is the push type mechanical switch unit with button, and the conductor when pressing in button makes the first end of mechanical switch unit be communicated with the second end.
Wherein, the first electronic switch unit is the first field effect transistor, and the drain electrode of corresponding first field effect transistor of the first end of the first electronic switch unit, the second end and control end difference, source electrode and grid.
Wherein, the second electronic switch unit is the second field effect transistor, the drain electrode of corresponding second field effect transistor respectively of the first end of the second electronic switch unit, the second end and control end, source electrode and grid.
Wherein, electronic equipment comprises the first resistance, the second resistance and the 3rd resistance; First resistance two ends connect source electrode and the grid of the first field effect transistor respectively; Second resistance one end connects the Enable Pin of energy-storage units, other end ground connection; 3rd resistance one end connects the grid of the second field effect transistor, other end ground connection.
Wherein, luminescence unit is light-emitting diode; Electronic equipment comprises the 4th resistance; 4th resistance is serially connected with between the cathode output end of energy-storage units and the anode of light-emitting diode, and the negative electrode of light-emitting diode connects the cathode output end of energy-storage units.
Wherein, the 4th resistance is adjustable resistance.
Wherein, electronic equipment is mobile phone, panel computer, MP4 or camera.
For solving the problem, another technical solution used in the present invention is: the flash control circuit providing a kind of portable electric appts, comprising: energy-storage units, the first electronic switch unit, the second electronic switch and mechanical switch unit; The power input of energy-storage units connects the output of electronic equipment power source, and the output of energy-storage units connects photoflash lamp; The Enable Pin of energy-storage units connects the first end of the first electronic switch unit, and the second end of the first electronic switch unit connects the output of electronic equipment power source; The first end of described second electronic switch unit connects the control end of the first switch element, the second end ground connection of described second electronic switch unit, and the control end of described second electronic switch unit connects the GPIO pin of baseband chip; The first end of mechanical switch unit connects the control end of the first electronic switch unit, and the second end of mechanical switch unit connects reference voltage; Wherein, when mechanically making the first end of mechanical switch unit be communicated with the second end, reference voltage triggers the first electronic switch unit conducting, the Enable Pin of energy-storage units is enabled and then makes photoflash lamp luminous.
The invention has the beneficial effects as follows: the situation being different from prior art, portable electric appts of the present invention and flash control circuit thereof, by the conducting of mechanical switch unit and the conducting of break trigger first electronic switch unit and cut-off, when mechanical switch cell conduction, first electronic switch unit conducting, the Enable Pin of energy-storage units is enabled, energy-storage units provides power supply for luminescence unit, luminescence unit is lit, therefore open without the need to electronic equipment, also can realize function luminescence unit being used as flashlight in the power-offstate.
Accompanying drawing explanation
Fig. 1 is the theory diagram of portable electric appts first embodiment of the present invention;
Fig. 2 is the theory diagram of portable electric appts second embodiment of the present invention;
Fig. 3 is the electrical block diagram of portable electric appts second embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Consult Fig. 1, Fig. 1 is the theory diagram of portable set first embodiment of the present invention.The embodiment of the present invention comprises: power supply 11, energy-storage units 12, luminescence unit 13, first electronic switch unit 14, mechanical switch unit 15 and equipment body circuit 16.
The second end 141 that the Enable Pin 122 of energy-storage units 12 connects first end 140, first electronic switch unit 14 of the first electronic switch unit 14 connects the control end 142 connection device main body circuit 16 of output 110, first electronic switch unit 14 of power supply 11.Certainly, the input 160 of the output 110 connection device main body circuit 16 of power supply 11, namely power supply 11 provides power supply for equipment body circuit 16.
The first end 150 of mechanical switch unit 15 connects the control end 142 of the first electronic switch unit 14 further, and the second end 151 of mechanical switch unit 15 connects reference voltage.
Wherein, when mechanically making the first end 150 of mechanical switch unit 15 be communicated with the second end 151, reference voltage triggers the first electronic switch unit 14 conducting, the Enable Pin 122 of energy-storage units 12 is enabled and then makes luminescence unit 13 luminous.This reference voltage can be the no-voltage of the earth, also can arrange as the case may be, not be restricted herein.
The embodiment of the present invention, by the conducting of mechanical switch unit 15 and the conducting of break trigger first electronic switch unit 14 and cut-off, when mechanical switch unit 15 disconnects, luminescence unit 13 is in OFF state, when 15 conducting of mechanical switch unit, first electronic switch unit 14 conducting, the Enable Pin 122 of energy-storage units 12 is enabled, energy-storage units 12 provides power supply for luminescence unit 13, luminescence unit 13 is lit, therefore in the power-offstate, function luminescence unit 13 being used as flashlight can also be realized.
In a preferred embodiment, mechanical switch unit 15 is the push type mechanical switch unit with button, and the conductor when pressing in button makes the first end 150 of mechanical switch unit 15 be communicated with the second end 151.
Consult Fig. 2, Fig. 2 is the theory diagram of portable electric appts second embodiment of the present invention.Portable electric appts second embodiment of the present invention not only comprises the power supply 21 corresponding with corresponding construction in the first embodiment, energy-storage units 22, luminescence unit 23, first electronic switch unit 24, mechanical switch unit 25 and equipment body circuit 26, also comprises: the second electronic switch unit 27.
Wherein, equipment body circuit 26 comprises baseband chip 261, and this baseband chip 261 also comprises GPIO (GeneralPurposeI/O, universal input/output) pin two 611.
The first end 270 of the second electronic switch unit 27 connects the second end 271 ground connection of control end 242, second electronic switch unit 27 of the first switch element 24, and the control end 272 of the second electronic switch unit 27 connects GPIO pin two 611.
Wherein, the first electronic switch unit 24 and the second electronic switch unit 27 all can be designed as field effect transistor.Certainly, the first switch element 24 and second switch unit 27 can also be the triodes of other type, as NPN type triode or PNP type triode, its operation principle and effect substantially identical with the embodiment of the present invention, do not do concrete restriction herein.
Particularly, refer to Fig. 3, Fig. 3 is the circuit diagram of portable electric appts second embodiment of the present invention.During design, for luminescence unit 23 be light-emitting diode, the first electronic switch unit 24 be the first field effect transistor and the second electronic switch unit 27 is that the second field effect transistor is described, further, hereinafter for the first field effect transistor be P-MOS pipe, the second field effect transistor is described for N-MOS pipe.
Namely first end 240, second end 241 of the first electronic switch unit 24 and control end 242 correspond to the drain electrode of the first field effect transistor, source electrode and grid respectively.First end 270, second end 271 of the second electronic switch unit 27 and control end 272 correspond to the drain electrode of the second field effect transistor, source electrode and grid respectively.
The grid of output 210, first field effect transistor of the source electrode connection power supply 21 of Enable Pin 222, first field effect transistor of the drain electrode connection energy-storage units 22 of the first field effect transistor connects the first end 250 of mechanical switch element 25.
The drain electrode of the second field effect transistor connects the grid of the first field effect transistor, the source ground of the second field effect transistor, and the grid of the second field effect transistor connects GPIO pin two 611.
In a preferred embodiment, this portable electric appts comprises the first resistance 301, second resistance 302, the 3rd resistance 303 and the 4th resistance 304 further.Continue to consult Fig. 3, particularly, the first resistance 301 two ends connect source electrode and the grid of the first field effect transistor respectively; Second resistance 302 one end connects the Enable Pin 222 of energy-storage units 22, other end ground connection; 3rd resistance 303 one end connects the grid of the second field effect transistor, other end ground connection; And, the output 221 of energy-storage units 22 can comprise cathode output end 2211, cathode output end 2212 further, 4th resistance 304 is serially connected with between the cathode output end 2211 of energy-storage units 22 and the anode of light-emitting diode, and the negative electrode of this light-emitting diode connects the cathode output end 2212 of energy-storage units 22.
The operation principle of the embodiment of the present invention is as follows:
Continue to consult Fig. 3, the effect of the first resistance 301 is that power supply 21 makes the voltage in the drain electrode of the voltage on the grid of the first field effect transistor and the second field effect transistor be the supply voltage (VBAT) of power supply 21 by the first resistance 301 when the second field effect transistor cut-off; The effect of the second resistance 302 Enable Pin 222 of energy-storage units 22 can be made to remain low level when the first field effect transistor cut-off; The effect of the 3rd resistance 303 makes the grid of the second field effect transistor be low level.
The input 260 of the output 210 connection device main body circuit 26 of power supply 21, for equipment body circuit 26 provides power supply.Wherein, when the GPIO pin two 611 of baseband chip 261 exports as high level, second field effect transistor conducting, due to the second field effect transistor conducting, the grid being then connected to the first field effect transistor in the drain electrode of the second field effect transistor also becomes low level, voltage on the source electrode of such first field effect transistor is the supply voltage of power supply 21, because supply voltage is greater than the voltage on the grid of the first field effect transistor, namely the voltage be equivalent on the source electrode of the first field effect transistor is greater than the voltage on its grid, according to the characteristic of field effect transistor, then the first field effect transistor conducting, thus the Enable Pin 222 of energy-storage units 22 is connected to supply voltage, then energy-storage units 22 is enabled, the power supply of energy-storage units 22 stable output makes LEDs ON, namely light-emitting diode is lighted.Equally, when mechanical switch unit 25 is pressed, the grid of the first field effect transistor is also low level, and the voltage be equivalent on the source electrode of the first field effect transistor is greater than the voltage on its grid, thus the first field effect transistor conducting, and light-emitting diode is switched on to be lighted.
And when the GPIO pin two 611 of baseband chip 261 exports as low level, second field effect transistor cut-off, then the grid of the first field effect transistor is also supply voltage by the first resistance 301, voltage on the source electrode of thus the first field effect transistor equals the voltage on its grid, first field effect transistor is also ended, then the Enable Pin 222 of energy-storage units 22 is because the drop-down effect of the second resistance 302 becomes low level, and energy-storage units 22 is closed and exported, and namely light-emitting diode is extinguished.
This portable electric appts is under open state: when taking, and software can realize photoflash lamp function by the control of GPIO pin two 611, is prior art, does not repeat one by one herein.And user is when needing to use its flashlight function, no matter portable electric appts is at open state or at off-mode, lumination of light emitting diode can be made by pressing mechanical switch unit 25 and then realize flashlight function.
Further, this portable electric appts is in the power-offstate: be power supply 21 due to what provide power supply for energy-storage units 22, thus when this portable electric appts is in off-mode, as long as power supply 21 also remains electricity, user presses mechanical switch unit 25, first field effect transistor conducting, and namely the Enable Pin 222 of energy-storage units 22 is enabled, light-emitting diode is then lit, and can realize its flashlight function like this.
In the present invention one preferred implementation, the resistance of the first resistance 301, second resistance 302, the 3rd resistance 303 and the 4th resistance 304 can be 100 kilo-ohms.Certainly, the 4th resistance 304 can be adjustable resistance, and during for adjustable resistance, when carrying out luminance test to light-emitting diode, not needing to change resistance only needs to regulate its resistance, simple to operate, cost-saving.It should be noted that in the embodiment of the present invention, the first resistance 301, second resistance 302, the 3rd resistance 303 and the 4th resistance 304 can select resistance and type according to actual conditions, are not restricted herein.
The embodiment of the present invention, only need can be controlled the conducting of the first electronic switch unit 24 by the conducting of mechanical switch 25, thus the Enable Pin 222 realizing energy-storage units 22 is enabled, the power supply that namely luminescence unit 23 provides by energy-storage units 22 is lighted.Under start or off-mode, all can realize function luminescence unit 23 being used as flashlight.
In above-described embodiment, energy-storage units can be charge pump, and portable electric appts can be mobile phone, panel computer, MP4 or camera etc.
The present invention also provides a kind of flash control circuit of the portable electric appts as described in above-mentioned any embodiment.
Wherein, the flash control circuit embodiment of this portable set at least comprises following structure:
Energy-storage units, the first electronic switch unit and mechanical switch unit.
The power input of energy-storage units connects the output of electronic equipment power source, and the output of energy-storage units connects photoflash lamp.
The Enable Pin of energy-storage units connects the first end of the first electronic switch unit, and the second end of the first electronic switch unit connects the output of electronic equipment power source, and the control end of the first electronic switch unit connects the main body circuit of electronic equipment.
The first end of mechanical switch unit connects the control end of the first electronic switch unit, and the second end of mechanical switch unit connects reference voltage.
Wherein, when mechanically making the first end of mechanical switch unit be communicated with the second end, reference voltage triggers the first electronic switch unit conducting, the Enable Pin of energy-storage units is enabled and then makes photoflash lamp luminous.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. a portable electric appts, is characterized in that, comprising:
Power supply, energy-storage units, luminescence unit, the first electronic switch unit, mechanical switch unit and equipment body circuit;
Described equipment body circuit comprises baseband chip, and described baseband chip comprises GPIO pin;
The output of described power supply connects the power input of energy-storage units, and the output of described energy-storage units connects luminescence unit;
The Enable Pin of described energy-storage units connects the first end of the first electronic switch unit, and the second end of described first electronic switch unit connects the output of power supply;
Described electronic equipment comprises the second electronic switch unit, the first end of described second electronic switch unit connects the control end of the first switch element, second end ground connection of described second electronic switch unit, the control end of described second electronic switch unit connects GPIO pin;
The first end of described mechanical switch unit connects the control end of the first electronic switch unit, and the second end of described mechanical switch unit connects reference voltage;
Wherein, when mechanically making the first end of described mechanical switch unit be communicated with the second end, described reference voltage triggers the first electronic switch unit conducting, the Enable Pin of described energy-storage units is enabled and then makes luminescence unit luminous.
2. electronic equipment according to claim 1, is characterized in that,
Described mechanical switch unit is the push type mechanical switch unit with button, and the conductor when pressing in button makes the first end of described mechanical switch unit be communicated with the second end.
3. electronic equipment according to claim 1, is characterized in that,
Described first electronic switch unit is the first field effect transistor, and the drain electrode of corresponding first field effect transistor of the first end of described first electronic switch unit, the second end and control end difference, source electrode and grid.
4. electronic equipment according to claim 3, is characterized in that,
Described second electronic switch unit is the second field effect transistor, the drain electrode of corresponding second field effect transistor respectively of the first end of described second electronic switch unit, the second end and control end, source electrode and grid.
5. electronic equipment according to claim 4, is characterized in that,
Described electronic equipment comprises the first resistance, the second resistance and the 3rd resistance;
Described first resistance two ends connect source electrode and the grid of the first field effect transistor respectively;
Described second resistance one end connects the Enable Pin of energy-storage units, other end ground connection;
Described 3rd resistance one end connects the grid of the second field effect transistor, other end ground connection.
6. electronic equipment according to claim 5, is characterized in that,
Described luminescence unit is light-emitting diode;
Described electronic equipment comprises the 4th resistance;
Described 4th resistance is serially connected with between the cathode output end of energy-storage units and the anode of light-emitting diode, and the negative electrode of described light-emitting diode connects the cathode output end of energy-storage units.
7. electronic equipment according to claim 6, is characterized in that,
Described 4th resistance is adjustable resistance.
8. electronic equipment according to claim 1, is characterized in that,
Described electronic equipment is mobile phone, panel computer, MP4 or camera.
9. a flash control circuit for portable electric appts, is characterized in that, comprising:
Energy-storage units, the first electronic switch unit, the second electronic switch and mechanical switch unit;
The power input of described energy-storage units connects the output of electronic equipment power source, and the output of described energy-storage units connects photoflash lamp;
The Enable Pin of described energy-storage units connects the first end of the first electronic switch unit, and the second end of described first electronic switch unit connects the output of electronic equipment power source;
The first end of described second electronic switch unit connects the control end of the first switch element, the second end ground connection of described second electronic switch unit, and the control end of described second electronic switch unit connects the GPIO pin of baseband chip;
The first end of described mechanical switch unit connects the control end of the first electronic switch unit, and the second end of described mechanical switch unit connects reference voltage;
Wherein, when mechanically making the first end of described mechanical switch unit be communicated with the second end, described reference voltage triggers the first electronic switch unit conducting, the Enable Pin of described energy-storage units is enabled and then makes photoflash lamp luminous.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210079540.4A CN102665320B (en) | 2012-03-22 | 2012-03-22 | Portable electric appts and flash control circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210079540.4A CN102665320B (en) | 2012-03-22 | 2012-03-22 | Portable electric appts and flash control circuit thereof |
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| CN102665320A CN102665320A (en) | 2012-09-12 |
| CN102665320B true CN102665320B (en) | 2015-11-25 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104159358A (en) * | 2014-06-30 | 2014-11-19 | 青岛海信移动通信技术股份有限公司 | Electric torch drive circuit and mobile terminal |
| CN104159359A (en) * | 2014-06-30 | 2014-11-19 | 青岛海信移动通信技术股份有限公司 | Electric torch drive circuit and mobile terminal |
| CN106061003B (en) * | 2016-05-25 | 2018-03-16 | 青岛海信移动通信技术股份有限公司 | Mobile terminal |
| CN107660023B (en) * | 2017-10-12 | 2019-09-20 | 上海展扬通信技术有限公司 | A kind of lighting circuit and intelligent terminal with the circuit of intelligent terminal |
| CN112332472B (en) * | 2020-10-13 | 2022-05-13 | 维沃移动通信有限公司 | Charging circuit, electronic device and flash lamp control method |
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Effective date of registration: 20210518 Address after: 272614 Industrial Park, quanpu Town, Jining City, Shandong Province Patentee after: SHANDONG WANSHIDA SPECIAL PURPOSE VEHICLE MANUFACTURING Co.,Ltd. Address before: 516006 Guangdong province Huizhou Zhongkai hi tech Development Zone No. 23 District Patentee before: HUIZHOU TCL MOBILE COMMUNICATION Co.,Ltd. |
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