CN102665320A - Portable electronic equipment and flash lamp control circuit thereof - Google Patents
Portable electronic equipment and flash lamp control circuit thereof Download PDFInfo
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- CN102665320A CN102665320A CN2012100795404A CN201210079540A CN102665320A CN 102665320 A CN102665320 A CN 102665320A CN 2012100795404 A CN2012100795404 A CN 2012100795404A CN 201210079540 A CN201210079540 A CN 201210079540A CN 102665320 A CN102665320 A CN 102665320A
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Abstract
The invention discloses portable electronic equipment and a flash lamp control circuit thereof. The equipment comprises a power supply, an energy storage unit, a light-emitting unit, a first electronic switch unit, a mechanical switch unit and an equipment main circuit. An output terminal of the power supply is connected with a power supply input terminal of the energy storage unit. The output terminal of the energy storage unit is connected with the light-emitting unit. A first terminal, a second terminal and a control terminal of the first electronic switch unit are connected with an enablement terminal of the energy storage unit, the output terminal of the power supply and the equipment main circuit respectively. The first terminal of the mechanical switch unit is connected with the control terminal of the electronic switch unit. The second terminal of the mechanical switch unit is connected with a reference voltage. When the first terminal and the second terminal of the mechanical switch unit are connected with each other through a mechanical mode, the reference voltage triggers the first electronic switch unit to be conducted so that the enablement terminal of the energy storage unit is enabled and the light-emitting unit is luminous. Through the above mode, when the electronic equipment of the invention is turned off, the light-emitting unit can be served as an electric torch.
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 is along with the development of mobile communication technology in recent years and make rapid progress.With mobile phone, at present mobile phone has been people's routine work essential electronic product of living, and its function is also more and more perfect.
Nowadays when mobile phones design, especially in the mobile phones design of being furnished with the high-pixel camera head, generally all dispose the photoflash lamp that is used to take pictures.Wherein, photoflash lamp generally adopts light-emitting diode.Yet photoflash lamp can only compensate light when taking pictures usually, and all the other time photoflash lamps generally are in idle state, and utilization ratio is lower.
In the prior art; The mobile phone that has is also the function of photoflash lamp as flashlight; Yet present this mobile phone photoflash lamp and the shared design of flashlight all are based under the open state of mobile phone; The user need get into certain menu could get into the flashlight function, and under the off-mode of mobile phone, can't use, and uses the flashlight function inconvenient to the user like this.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of portable electric appts and flash control circuit thereof, under electronic equipment is in off-mode, can realize the function of luminescence unit as flashlight.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of portable electric appts is provided, comprises: power supply, energy-storage units, luminescence unit, 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 Enable Pin of energy-storage units connects first end of first electronic switch unit, and second end of first electronic switch unit connects the output of power supply, the control end connection device main body circuit of first electronic switch unit; First end of mechanical switch unit connects the control end of first electronic switch unit, and second end of mechanical switch unit connects reference voltage; Wherein, when first end and second end of mechanical switch unit were communicated with, reference voltage triggered the first electronic switch unit conducting, the Enable Pin of energy-storage units is enabled and then makes luminescence unit luminous.
Wherein, the mechanical switch unit is the push type mechanical switch unit with button, and the conductor when pushing in the button is communicated with first end of mechanical switch unit and second end.
Wherein, the equipment body circuit comprises baseband chip, and baseband chip comprises the GPIO pin; Electronic equipment comprises second electronic switch unit, and first end of second electronic switch unit connects the control end of first switch element, the second end ground connection of second electronic switch unit, and the control end of second electronic switch unit connects the GPIO pin.
Wherein, first electronic switch unit is first FET, and drain electrode, source electrode and the grid of first end of first electronic switch unit, second end and corresponding first FET of control end difference.
Wherein, second electronic switch unit is second FET, and first end of second electronic switch unit, second end and control end be drain electrode, source electrode and the grid of corresponding second FET respectively.
Wherein, electronic equipment comprises first resistance, second resistance and the 3rd resistance; The first resistance two ends connect the source electrode and the grid of first FET respectively; Second resistance, one end connects the Enable Pin of energy-storage units, other end ground connection; The 3rd resistance one end connects the grid of second FET, other end ground connection.
Wherein, luminescence unit is a light-emitting diode; Electronic equipment comprises the 4th resistance; The 4th resistance string is connected between the anode of cathode output end and light-emitting diode of energy-storage units, 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 addressing the above problem, another technical scheme that the present invention adopts is: a kind of flash control circuit of portable electric appts is provided, comprises: energy-storage units, 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 first end of first electronic switch unit, and second end of first electronic switch unit connects the output of electronic equipment power source, and the control end of first electronic switch unit connects the main body circuit of electronic equipment; First end of mechanical switch unit connects the control end of first electronic switch unit, and second end of mechanical switch unit connects reference voltage; Wherein, when first end and second end of mechanical switch unit were communicated with, reference voltage triggered 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 that is different from prior art; Portable electric appts of the present invention and flash control circuit thereof, the conducting through the mechanical switch unit and the conducting of break trigger first electronic switch unit and end are when the mechanical switch cell conduction; The first electronic switch unit conducting; The Enable Pin of energy-storage units is enabled, and energy-storage units is that luminescence unit provides power supply, and luminescence unit is lighted; Therefore need not electronic equipment and open, under off-mode, also can realize the function of luminescence unit as flashlight.
Description of drawings
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 accompanying drawing and embodiment the present invention is elaborated.
Consult Fig. 1, Fig. 1 is the theory diagram of portable set first embodiment of the present invention.The embodiment of the 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.
Second end 141 of first end, 140, the first electronic switch units 14 of Enable Pin 122 connections first electronic switch unit 14 of energy-storage units 12 connects the control end 142 connection device main body circuit 16 of output 110, the first electronic switch units 14 of power supplys 11.Certainly, the input 160 of the output 110 connection device main body circuit 16 of power supply 11, promptly power supply 11 provides power supply for equipment body circuit 16.
Wherein, when first end 150 and second end 151 of mechanical switch unit 15 were communicated with, reference voltage triggered 14 conductings of first electronic switch unit, 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 be provided with as the case may be, does not limit here.
The embodiment of the invention, the conducting through mechanical switch unit 15 and the conducting of break trigger first electronic switch unit 14 and end, 15 when breaking off in the mechanical switch unit; Luminescence unit 13 is in and extinguishes state; In the mechanical switch unit during 15 conductings, 14 conductings of first electronic switch unit, 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 lighted, and therefore under off-mode, also can realize the function of luminescence unit 13 as flashlight.
In a preferred embodiment, mechanical switch unit 15 is the push type mechanical switch unit with button, and the conductor when pushing in the button is communicated with first end 150 of mechanical switch unit 15 and 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 comprise with first embodiment in the corresponding power supply 21 of corresponding construction, energy-storage units 22, luminescence unit 23, first electronic switch unit 24, mechanical switch unit 25 and equipment body circuit 26, also comprise: second electronic switch unit 27.
Wherein, equipment body circuit 26 comprises baseband chip 261, and this baseband chip 261 also comprises GPIO (General Purpose I/O, general I/O) pin two 611.
Wherein, first electronic switch unit 24 and second electronic switch unit 27 all can be designed as FET.Certainly, first switch element 24 and second switch unit 27 can also be the triodes of other type, and like NPN type triode or positive-negative-positive triode, its operation principle and effect and the embodiment of the invention are basic identical, do not do concrete restriction here.
Particularly, see also Fig. 3, Fig. 3 is the circuit diagram of portable electric appts second embodiment of the present invention.During design; With luminescence unit 23 is that light-emitting diode, first electronic switch unit 24 are that first FET and second electronic switch unit 27 are that second FET is that example describes; And, be that P-MOS pipe, second FET are that the N-MOS pipe is that example describes hereinafter with first FET.
The grid of output 210, the first FETs of the source electrode connection power supply 21 of Enable Pin 222, the first FETs of the drain electrode connection energy-storage units 22 of first FET connects first end 250 of mechanical switch element 25.
The drain electrode of second FET connects the grid of first FET, the source ground of second FET, and the grid of second FET connects GPIO pin two 611.
In a preferred embodiment, this portable electric appts further comprises first resistance 301, second resistance 302, the 3rd resistance 303 and the 4th resistance 304.Continue to consult Fig. 3, particularly, first resistance, 301 two ends connect the source electrode and the grid of first FET respectively; Second resistance, 302 1 ends connect the Enable Pin 222 of energy-storage units 22, other end ground connection; The 3rd resistance 303 1 ends connect the grid of second FET, other end ground connection; And; The output 221 of energy-storage units 22 can further comprise cathode output end 2211, cathode output end 2212; The 4th resistance 304 is serially connected with between the anode of cathode output end 2211 and light-emitting diode of energy-storage units 22, 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 invention is following:
Continue to consult Fig. 3, the effect of first resistance 301 be when second FET by the time, power supply 21 makes the voltage in the drain electrode of voltage and second FET on the grid of the FET of winning be the supply voltage (VBAT) of power supply 21 through first resistance 301; The effect of second resistance 302 is when first FET ends, can make the Enable Pin 222 of energy-storage units 22 remain low level; The effect of the 3rd resistance 303 is that when the GPIO of baseband chip 261 pin two 611 is not exported, to make the grid of second FET be low level.
The input 260 of the output 210 connection device main body circuit 26 of power supply 21 is for equipment body circuit 26 provides power supply.Wherein, when the GPIO of baseband chip 261 pin two 611 is output as high level, the second FET conducting; Because the second FET conducting, the grid that then is connected to first FET in the drain electrode of second FET also becomes low level, and the voltage on the source electrode of such first FET is the supply voltage of power supply 21; Because supply voltage is greater than the voltage on the grid of first FET; Promptly be equivalent to voltage on the source electrode of first FET greater than the voltage on its grid, according to the characteristic of FET, the then first FET conducting; Thereby the Enable Pin 222 of energy-storage units 22 is connected to supply voltage; Then energy-storage units 22 is enabled, and energy-storage units 22 output stable power make the light-emitting diode conducting, promptly light light-emitting diode.Equally, when mechanical switch unit 25 was pressed, the grid of first FET was a low level also, was equivalent to voltage on the source electrode of first FET greater than the voltage on its grid, thereby the first FET conducting, and light-emitting diode is switched on to be lighted.
And when the GPIO of baseband chip 261 pin two 611 is output as low level; Second FET ends, and then the grid of first FET also is a supply voltage through first resistance 301, thereby the voltage on the source electrode of first FET equals the voltage on its grid; First FET also ends; Then the Enable Pin 222 of energy-storage units 22 is because the drop-down effect of second resistance 302 becomes low level, and energy-storage units 22 is closed output, and promptly light-emitting diode is extinguished.
This portable electric appts is under open state: when taking pictures, software can be realized the photoflash lamp function through the control of GPIO pin two 611, is prior art, does not give unnecessary details one by one here.And the user is need use its flashlight function the time, no matter portable electric appts at open state or at off-mode, can make lumination of light emitting diode and then realize the flashlight function through pressing mechanical switch unit 25.
Further, this portable electric appts is under off-mode: owing to what for energy-storage units 22 power supply is provided is power supply 21, thereby when this portable electric appts is in off-mode; As long as power supply 21 also remains electric weight is arranged; The user presses 25, the first FET conductings of mechanical switch unit, and the Enable Pin 222 of energy-storage units 22 promptly is enabled; Light-emitting diode is then lighted, and can realize its flashlight function like this.
In the present invention's one preferred implementation, the resistance of 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, during for adjustable resistance, when light-emitting diode is carried out luminance test, need not change resistance and only need regulate its resistance and get final product, and is simple to operate, practices thrift cost.It should be noted that in the embodiment of the invention that first resistance 301, second resistance 302, the 3rd resistance 303 and the 4th resistance 304 can not limit according to selected resistance of actual conditions and type here.
The embodiment of the invention only needs the conducting through conducting may command first electronic switch unit 24 of mechanical switch 25, thereby the Enable Pin 222 that realizes energy-storage units 22 is enabled, and luminescence unit 23 can be lighted through the power supply that energy-storage units 22 provides.Under start or off-mode, all can realize the function of luminescence unit 23 as flashlight.
In the foregoing description, energy-storage units can be a 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 as the described portable electric appts of above-mentioned arbitrary embodiment.
Wherein, the flash control circuit embodiment of this portable set comprises following structure at least:
Energy-storage units, 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 first end of first electronic switch unit, and second end of first electronic switch unit connects the output of electronic equipment power source, and the control end of first electronic switch unit connects the main body circuit of electronic equipment.
First end of mechanical switch unit connects the control end of first electronic switch unit, and second end of mechanical switch unit connects reference voltage.
Wherein, when first end and second end of mechanical switch unit were communicated with, reference voltage triggered the first electronic switch unit conducting, the Enable Pin of energy-storage units is enabled and then makes photoflash lamp luminous.
The above is merely embodiments of the invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. a portable electric appts is characterized in that, comprising:
Power supply, energy-storage units, luminescence unit, first electronic switch unit, mechanical switch unit and equipment body circuit;
The output of said power supply connects the power input of energy-storage units, and the output of said energy-storage units connects luminescence unit;
The Enable Pin of said energy-storage units connects first end of first electronic switch unit, and second end of said first electronic switch unit connects the output of power supply, the control end connection device main body circuit of said first electronic switch unit;
First end of said mechanical switch unit connects the control end of first electronic switch unit, and second end of said mechanical switch unit connects reference voltage;
Wherein, when first end and second end of said mechanical switch unit were communicated with, said reference voltage triggered the first electronic switch unit conducting, the Enable Pin of said energy-storage units is enabled and then makes luminescence unit luminous.
2. electronic equipment according to claim 1 is characterized in that,
Said mechanical switch unit is the push type mechanical switch unit with button, and the conductor when pushing in the button is communicated with first end of said mechanical switch unit and second end.
3. electronic equipment according to claim 1 is characterized in that,
Said equipment body circuit comprises baseband chip, and said baseband chip comprises the GPIO pin;
Said electronic equipment comprises second electronic switch unit; First end of said second electronic switch unit connects the control end of first switch element; The second end ground connection of said second electronic switch unit, the control end of said second electronic switch unit connects the GPIO pin.
4. electronic equipment according to claim 3 is characterized in that,
Said first electronic switch unit is first FET, and drain electrode, source electrode and the grid of first end of said first electronic switch unit, second end and corresponding first FET of control end difference.
5. electronic equipment according to claim 4 is characterized in that,
Said second electronic switch unit is second FET, and first end of said second electronic switch unit, second end and control end be drain electrode, source electrode and the grid of corresponding second FET respectively.
6. electronic equipment according to claim 5 is characterized in that,
Said electronic equipment comprises first resistance, second resistance and the 3rd resistance;
The said first resistance two ends connect the source electrode and the grid of first FET respectively;
Said second resistance, one end connects the Enable Pin of energy-storage units, other end ground connection;
Said the 3rd resistance one end connects the grid of second FET, other end ground connection.
7. electronic equipment according to claim 6 is characterized in that,
Said luminescence unit is a light-emitting diode;
Said electronic equipment comprises the 4th resistance;
Said the 4th resistance string is connected between the anode of cathode output end and light-emitting diode of energy-storage units, and the negative electrode of said light-emitting diode connects the cathode output end of energy-storage units.
8. electronic equipment according to claim 7 is characterized in that,
Said the 4th resistance is adjustable resistance.
9. electronic equipment according to claim 1 is characterized in that,
Said electronic equipment is mobile phone, panel computer, MP4 or camera.
10. the flash control circuit of a portable electric appts is characterized in that, comprising:
Energy-storage units, first electronic switch unit and mechanical switch unit;
The power input of said energy-storage units connects the output of electronic equipment power source, and the output of said energy-storage units connects photoflash lamp;
The Enable Pin of said energy-storage units connects first end of first electronic switch unit, and second end of said first electronic switch unit connects the output of electronic equipment power source, and the control end of said first electronic switch unit connects the main body circuit of electronic equipment;
First end of said mechanical switch unit connects the control end of first electronic switch unit, and second end of said mechanical switch unit connects reference voltage;
Wherein, when first end and second end of said mechanical switch unit were communicated with, said reference voltage triggered the first electronic switch unit conducting, the Enable Pin of said energy-storage units is enabled and then makes photoflash lamp luminous.
Priority Applications (1)
| 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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| CN201210079540.4A CN102665320B (en) | 2012-03-22 | 2012-03-22 | Portable electric appts and flash control circuit thereof |
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| CN102665320A true CN102665320A (en) | 2012-09-12 |
| CN102665320B CN102665320B (en) | 2015-11-25 |
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| 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 |
| CN106061003A (en) * | 2016-05-25 | 2016-10-26 | 青岛海信移动通信技术股份有限公司 | Mobile terminal |
| CN107660023A (en) * | 2017-10-12 | 2018-02-02 | 上海展扬通信技术有限公司 | A kind of lighting circuit of intelligent terminal and the intelligent terminal with the circuit |
| CN112332472A (en) * | 2020-10-13 | 2021-02-05 | 维沃移动通信有限公司 | Charging circuit, electronic device and flash lamp control method |
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| 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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|---|---|
| CN102665320B (en) | 2015-11-25 |
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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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