CN105407610A - Method and apparatus for controlling dual flash lamps - Google Patents
Method and apparatus for controlling dual flash lamps Download PDFInfo
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- CN105407610A CN105407610A CN201510915087.XA CN201510915087A CN105407610A CN 105407610 A CN105407610 A CN 105407610A CN 201510915087 A CN201510915087 A CN 201510915087A CN 105407610 A CN105407610 A CN 105407610A
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Abstract
The invention discloses a method and an apparatus for controlling dual flash lamps. The apparatus comprises a first control module, a driving module and a second control module, wherein the first control module is used for generating a first control signal and a second control signal; the driving module is used for generating a driving signal under the control of the first control signal; and the second control module is used for controlling the driving signal under the control of the second control signal to output the driving signal to a first light emitting diode or a second light emitting diode so as to the realize a function of dual flash lamps. By adoption of the mode, the function of dual flash lamps can be realized at a relatively low cost, so as to further reduce the production cost of a mobile terminal.
Description
Technical field
The present invention relates to field of mobile terminals, particularly relate to a kind of method and the device that control double flashing light.
Background technology
Along with the development of camera function, increasing mobile terminal adopts forward and backward double flashing light design.In order to realize forward and backward double flashing light function, in circuit design, a two-way photoflash lamp driving chip or two the single channel photoflash lamp driving chip of adopting realize double flashing light function more at present.
Wherein, adopt two-way photoflash lamp driving chip, because two-way photoflash lamp driving chip cost is very high, and then the production cost of mobile terminal can be improved.And adopt two single channel photoflash lamp driving chip, the corresponding usable floor area that can increase the printed circuit board (PCB) of mobile terminal, and then also can improve the production cost of mobile terminal.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of method and the device that control double flashing light, can realize double flashing light function at lower cost, and then reduces the production cost of mobile terminal.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of device controlling double flashing light, this device comprises: the first control module, for generation of the first control signal and the second control signal; Driver module, for producing drive singal under the control of the first control signal; Second control module, exports the first light-emitting diode or the second light-emitting diode to, to realize double flashing light function for controlling drive singal under the control of the second control signal.
Wherein, second control module comprises digital triode, first metal-oxide-semiconductor and the second metal-oxide-semiconductor, the numeral input of triode and the grid of the second metal-oxide-semiconductor receive the second control signal, the output of numeral triode is connected with the grid of the first metal-oxide-semiconductor, the source electrode of the first metal-oxide-semiconductor is connected with the anode of the first light-emitting diode, the source electrode of the second metal-oxide-semiconductor is connected with the anode of the second light-emitting diode, the drain electrode of the first metal-oxide-semiconductor and the second metal-oxide-semiconductor receives drive singal, the minus earth of the first switching diode and second switch diode.
Wherein, driver module comprises driving chip, and driving chip comprises enable pin, drives pin, and enable pin receives the first control signal, drives pin output drive signal; Wherein, when the first control signal is effective, if the second control signal is low level signal, drive singal is sent to the first light-emitting diode to control the first light-emitting diode flash, if the second control signal is high level signal, drive singal exports the second light-emitting diode to control the second light-emitting diode flash.
Wherein, driving chip supports PWM or I2C adjustable current, exports the electric current of the drive singal of the second light-emitting diode to make the electric current of the drive singal exporting the first light-emitting diode to be different to.
Wherein, when the first control signal is high level signal, the first control signal is effective.
Wherein, in sequential, the second control signal produces prior to the first control signal.
Wherein, the first control module is the general I/O port of base band control chip.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of method providing double flashing light, and the method comprises: any one camera on starting hand-set; Obtain the mark of the camera be unlocked, produce the second control signal, with the path making the second control module be communicated with the driver module light-emitting diode corresponding with the camera be unlocked under the control of the second control signal according to mark control first control module; Obtain flash lamp operation mode instruction, control the first control module according to flash lamp operation mode instruction and produce the first control signal, under the control of the first control signal, produce drive singal to make driver module and export light-emitting diode corresponding to the camera that is unlocked to.
Wherein, camera comprises first camera corresponding with the first light-emitting diode and the second camera corresponding with the second light-emitting diode, and driver module comprises driving chip; Wherein, when the camera be unlocked be designated the first camera time, controlling the second control signal is low level signal, to be communicated with the path of driving chip and the first light-emitting diode; When the camera be unlocked be designated second camera time, controlling the second control signal is high level signal, to be communicated with the path of driving chip and the second light-emitting diode.
Wherein, the method comprises further: when the camera be unlocked be designated the first camera time, control according to flash lamp operation mode instruction the drive singal that driver module generation current is the first electric current; When the camera be unlocked be designated second camera time, control according to flash lamp operation mode instruction the drive singal that driver module generation current is the second electric current; Wherein, the first electric current is different from the second electric current.
The invention has the beneficial effects as follows: the situation being different from prior art, the method of control photoflash lamp of the present invention and device produce the first control signal and the second control signal by the first control module, driver module produces drive singal under the control of the first control signal, second control module controls drive singal and exports the first light-emitting diode or the second light-emitting diode under the control of the second control signal, and then realizes double flashing light function.By the way, the present invention can realize double flashing light function at lower cost, and then reduces the production cost of mobile terminal.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device of the control double flashing light of the embodiment of the present invention;
Fig. 2 is the circuit theory diagrams of the device of the control double flashing light shown in Fig. 1;
Fig. 3 is the flow chart of the method for the control double flashing light of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and embodiments, the present invention is described in detail.
Fig. 1 is the structural representation of the device of the control double flashing light of the embodiment of the present invention.As shown in Figure 1, this device comprises the first control module 10, driver module 20, second control module 30, first light-emitting diode 40 and the second light-emitting diode 50.
First control module 10 is for generation of the first control signal EN1 and the second control signal EN2.
Driver module 20 is connected with the first control module 10, for producing drive singal DV under the control of the first control signal EN1.
Second control module 30 is connected with driver module 20 and the first control module 10 respectively, exports the first light-emitting diode 40 or the second light-emitting diode 50 to, thus realize double flashing light function for controlling drive singal DV under the control of the second control signal EN2.
The circuit theory diagrams of the device of the control double flashing light shown in Fig. 1 please also refer to Fig. 2, Fig. 2.As shown in Figure 2, the first control module 10 is the general I/O port of base band control chip, and it comprises a GPIO mouth GPIO1 and the 2nd GPIO mouth GPIO2.Driver module 20 comprises driving chip U1, the first electric capacity C1, the second electric capacity C2, inductance H1, and wherein, driving chip U1 comprises enable pin STROBE, drives pin LED, the first power input pin IN, second source input pin SW, power supply output pin OUT.Second control module 30 comprises digital triode U2, the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2.
The enable pin STROBE of driving chip U1 is connected with a GPIO mouth GPIO1, for receiving the first control signal EN1.The driving pin LED of driving chip U1 is connected, for output drive signal DV with the drain D 2 of the drain D 1 of the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2.The power input pin IN of driving chip U1 receives DC power signal VIN, and wherein, the voltage of DC power signal VIN is between 2.5V to 5.5V; Meanwhile, the first power input pin IN of driving chip U1 is connected with one end of the first electric capacity C1 and one end of inductance H1 respectively, the other end ground connection GND of the first electric capacity C1.The second source input pin SW of driving chip U1 is connected with the other end of inductance H1.One end of the power supply output pin OUT of the U1 of driving chip is connected with one end of the second electric capacity C2, the other end ground connection GND of the second electric capacity C2.
Wherein, the first electric capacity C1 is preferably 10 microfarads, and the second electric capacity C2 is preferably 10 microfarads, and inductance H1 is preferably 1 microhenry.
The input IN of numeral triode U2 is connected with the 2nd GPIO mouth GPIO2, for receiving the second control signal EN2 with the grid G 2 of the second metal-oxide-semiconductor M2.The output OUT of numeral triode U2 is connected with the grid G 1 of the first metal-oxide-semiconductor M1, the source S 1 of the first metal-oxide-semiconductor M1 is connected with the anode of the first light-emitting diode 40, the source S 2 of the second metal-oxide-semiconductor M2 is connected with the anode of the second light-emitting diode 50, the drain D 1 of the first metal-oxide-semiconductor M1 and the drain D 2 of the second metal-oxide-semiconductor M2 receive drive singal DV, the minus earth GND of the first light-emitting diode 40 and the second light-emitting diode 50.
Wherein, when the first control signal EN1 is effective, if the second control signal EN2 is low level signal, the second metal-oxide-semiconductor M2 ends; Simultaneously, the output OUT of numeral triode U2 exports high level signal to make the first metal-oxide-semiconductor M1 conducting, to make the drain D 1 of the first metal-oxide-semiconductor M1 be communicated with source S 1, and then make drive singal DV be sent to the first light-emitting diode 40 by the first metal-oxide-semiconductor M1 to glisten to control the first light-emitting diode 40.If the second control signal EN2 is high level signal, the output OUT output low level signal of digital triode U2 ends to make the first metal-oxide-semiconductor M1; Meanwhile, the second metal-oxide-semiconductor M2 conducting is communicated with source S 2 to make the drain D 2 of the second metal-oxide-semiconductor M2, and then makes drive singal DV export the second light-emitting diode 50 to by the second metal-oxide-semiconductor M2 to glisten to control the second light-emitting diode 50.In the present embodiment, when the first control signal EN1 is high level signal, the first control signal EN1 is effective.
When the first light-emitting diode 40 is different from the second light-emitting diode 50, it has different operating currents, therefore, driving chip U1 is preferably the single channel photoflash lamp driving chip supporting PWM or I2C adjustable current, exports the electric current of the drive singal DV of the second light-emitting diode 50 to make the electric current of the drive singal DV exporting the first light-emitting diode 40 to be different to.
Specifically, in the present embodiment, driving chip U1 comprises I2C interface, and it is connected with ppu (not shown).Ppu provides electric current to be the drive singal DV of second electric current to command character corresponding to the Current Control register write in driving chip U1 with the drive singal DV providing electric current to be the first electric current to the first light-emitting diode 40 or to the second light-emitting diode 50 by I2C interface according to flash lamp operation module instruction, wherein, the maximum of the first electric current and the second electric current is 1.5A, and minimum value is 93.75mA.In other embodiments, when driving chip U1 supports PWM adjustable current, also can obtain different electric currents by adjustment PWM.
Preferably; because driving chip U1 can select the single channel photoflash lamp driving chip of different model, the driving pin of part single channel photoflash lamp driving chip has open circuit protecting function, therefore; in sequential, the second control signal EN2 produces prior to the first control signal EN1.That is, the second control signal EN2 first controls the second control module 30 work and makes the driving pin of driving chip U1 be in normal operating conditions, and then the first control signal EN1 controls driving chip U1 work again with output drive signal DV.
Fig. 3 is the flow chart of the method for the control double flashing light of the embodiment of the present invention, the present invention is based on the device shown in Fig. 2.As shown in Figure 3, the method comprises the steps:
Step S101: any one camera on starting hand-set.
In step S101, camera comprises first camera corresponding with the first light-emitting diode and the second camera corresponding with the second light-emitting diode, and namely any one camera on starting hand-set is also opened the first camera or opened second camera.
Step S102: the mark obtaining the camera be unlocked, the second control signal is produced, with the path making the second control module be communicated with the driver module light-emitting diode corresponding with the camera be unlocked under the control of the second control signal according to mark control first control module.
In step s 102, the mark of the camera be unlocked is obtained by operating system, when the camera be unlocked be designated the first camera time, first control module produces the second control signal of low level signal, to be communicated with the path of driving chip and the first light-emitting diode, when the camera be unlocked be designated second camera time, the first control module produces the second control signal of high level signal, to be communicated with the path of driving chip and the second light-emitting diode.Wherein, driving chip is arranged in driver module.
Step S103: obtain flash lamp operation mode instruction, control the first control module according to flash lamp operation mode instruction and produce the first control signal, under the control of the first control signal, produce drive singal to make driver module and export light-emitting diode corresponding to the camera that is unlocked to.
In step s 103, flash lamp operation mode instruction is obtained by operating system, first control module produces the first control signal of high level signal to control driving chip work according to flash lamp operation mode instruction, now, driving chip output drive signal is to light-emitting diode corresponding to the camera be unlocked.
Preferably, in the present embodiment, after the first control module produces the first control signal of high level signal according to flash lamp operation mode instruction, ppu according to flash lamp operation module instruction by I2C interface to command character corresponding to the Current Control register write in driving chip to provide the drive singal of the first electric current to the first light-emitting diode or to provide the drive singal of the second electric current to the second light-emitting diode.That is, when the camera be unlocked be designated the first camera time, ppu controls driver module generation current according to flash lamp operation mode instruction and is the drive singal of the first electric current and exports the first light-emitting diode to; When the camera be unlocked be designated second camera time, control driver module generation current according to flash lamp operation mode instruction and be the drive singal of the second electric current and export the second light-emitting diode to.Wherein, the first electric current is different from the second electric current.
The invention has the beneficial effects as follows: the situation being different from prior art, the method of control photoflash lamp of the present invention and device produce the first control signal and the second control signal by the first control module, driver module produces drive singal under the control of the first control signal, and the second control module controls drive singal and exports the first light-emitting diode or the second light-emitting diode to realize double flashing light function under the control of the second control signal.By the way, the present invention only uses a single channel photoflash lamp driving chip can realize double flashing light function, reduces the cost realizing double flashing light function, and then reduces the production cost of mobile terminal.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention 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 (10)
1. control a device for double flashing light, it is characterized in that, described device comprises:
First control module, for generation of the first control signal and the second control signal;
Driver module, for producing drive singal under the control of described first control signal;
Second control module, exports the first light-emitting diode or the second light-emitting diode to, to realize double flashing light function for controlling described drive singal under the control of described second control signal.
2. device according to claim 1, it is characterized in that, described second control module comprises digital triode, first metal-oxide-semiconductor and the second metal-oxide-semiconductor, the input of described digital triode and the grid of described second metal-oxide-semiconductor receive described second control signal, the output of described digital triode is connected with the grid of the first metal-oxide-semiconductor, the source electrode of described first metal-oxide-semiconductor is connected with the anode of the first light-emitting diode, the source electrode of described second metal-oxide-semiconductor is connected with the anode of the second light-emitting diode, the drain electrode of described first metal-oxide-semiconductor and described second metal-oxide-semiconductor receives described drive singal, the minus earth of described first switching diode and described second switch diode.
3. device according to claim 2, it is characterized in that, described driver module comprises driving chip, and described driving chip comprises enable pin, drives pin, described enable pin receives described first control signal, and described driving pin exports described drive singal;
Wherein, when described first control signal is effective, if the second control signal is low level signal, described drive singal is sent to described first light-emitting diode to control described first light-emitting diode flash, if the second control signal is high level signal, described drive singal exports described second light-emitting diode to control described second light-emitting diode flash.
4. device according to claim 3, it is characterized in that, described driving chip supports PWM or I2C adjustable current, exports the electric current of the described drive singal of described second light-emitting diode to make the electric current of the described drive singal exporting described first light-emitting diode to be different to.
5. device according to claim 3, is characterized in that, when described first control signal is high level signal, described first control signal is effective.
6. device according to claim 1, is characterized in that, in sequential, described second control signal produces prior to described first control signal.
7. device according to claim 1, is characterized in that, described first control module is the general I/O port of base band control chip.
8. control a method for double flashing light, it is characterized in that, described method comprises:
Any one camera on starting hand-set;
Obtain the mark of the described camera be unlocked, the second control signal is produced, with the path making the second control module be communicated with the driver module light-emitting diode corresponding with the camera be unlocked under the control of described second control signal according to described mark control first control module;
Obtain flash lamp operation mode instruction, control the first control module according to flash lamp operation mode instruction and produce the first control signal, under the control of described first control signal, produce drive singal to make described driver module and export light-emitting diode corresponding to the camera that is unlocked to.
9. method according to claim 8, is characterized in that, described camera comprises first camera corresponding with the first light-emitting diode and the second camera corresponding with the second light-emitting diode, and described driver module comprises driving chip;
Wherein, when the camera be unlocked be designated described first camera time, controlling described second control signal is low level signal, to be communicated with the path of described driving chip and described first light-emitting diode;
When the camera be unlocked be designated described second camera time, controlling described second control signal is high level signal, to be communicated with the path of described driving chip and described second light-emitting diode.
10. method according to claim 9, is characterized in that, described method comprises further:
When the camera be unlocked be designated described first camera time, control according to flash lamp operation mode instruction the described drive singal that described driver module generation current is the first electric current;
When the camera be unlocked be designated described second camera time, control according to flash lamp operation mode instruction the described drive singal that described driver module generation current is the second electric current;
Wherein, described first electric current is different from described second electric current.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510915087.XA CN105407610B (en) | 2015-12-09 | 2015-12-09 | A kind of method and device for controlling double flashing light |
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| CN201510915087.XA CN105407610B (en) | 2015-12-09 | 2015-12-09 | A kind of method and device for controlling double flashing light |
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| CN105407610A true CN105407610A (en) | 2016-03-16 |
| CN105407610B CN105407610B (en) | 2018-07-06 |
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| CN106412455A (en) * | 2016-11-24 | 2017-02-15 | 上海传英信息技术有限公司 | Photoflash lamp device and photographing apparatus |
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| CN105407610B (en) | 2018-07-06 |
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