CN205124050U - Mobile terminal and flashlight drive circuit thereof - Google Patents
Mobile terminal and flashlight drive circuit thereof Download PDFInfo
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- CN205124050U CN205124050U CN201520794234.8U CN201520794234U CN205124050U CN 205124050 U CN205124050 U CN 205124050U CN 201520794234 U CN201520794234 U CN 201520794234U CN 205124050 U CN205124050 U CN 205124050U
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Abstract
The utility model provides a mobile terminal and flashlight drive circuit thereof, mobile terminal includes baseband chip and flashlight drive circuit, flashlight drive circuit includes electrical unit, with the press unit that power one end is connected, press unit other end ground connection, with the the control unit that press unit connects, the control unit still with the power is connected, with the luminescence unit that the control unit connects, luminescence unit other end ground connection. The utility model discloses a press unit opens the flashlight function, when mobile terminal is in start or standby state, just can open the flashlight function according to this press unit, when mobile terminal was in power off, also can growing in due order, press unit opened the flashlight function. The utility model provides a flashlight drive circuit simple structure, convenient operation, cost are lower.
Description
Technical field
The present invention relates to terminal equipment technical field, particularly relate to a kind of mobile terminal and flashlight drive circuit thereof.
Background technology
Along with the develop rapidly of electronic technology, mobile terminal becomes indispensable electronic equipment in people's life, and the function that mobile terminal possesses becomes the factor that people pay close attention to most.Wherein, this function of flashlight becomes in these functions and seems simple but one of very practical function, and in daily life, people often can use this function of flashlight.Flashlight drive circuit of the prior art is equivalent to a switch, is connected between battery and LED, and user need grow and flashlight could be made to keep long bright by this switch.Certain part mobile terminal can adopt software control to realize the operation of opening and closing of LED, usual user needs to click flashlight on the touch-screen of mobile terminal and indicates and could open flashlight function, and realizes this operation and can only be at mobile terminal and start shooting or holding state; Cannot operate when mobile terminal is in off-mode.
Summary of the invention
In order to solve deficiency of the prior art, the utility model provides a kind of mobile terminal and flashlight drive circuit thereof, opens flashlight function by a push-button unit.When mobile terminal is in start or holding state, just flashlight function can be opened by this push-button unit; When mobile terminal is in off-mode, also can grows push-button unit in due order and open flashlight function.
The utility model proposed technical scheme that solves the problem is: provide a kind of mobile terminal flashlight drive circuit, described mobile terminal comprises baseband chip, described baseband chip is provided with interruptive port and control port, it is characterized in that, described flashlight drive circuit comprises
Power subsystem;
The push-button unit be connected with described power subsystem one end, described push-button unit other end ground connection;
The control unit be connected with described push-button unit, described control unit is also connected with described power subsystem;
The luminescence unit be connected with described control unit, described luminescence unit other end ground connection.
Further, described control unit comprises
The first resistance be connected with one end of described power subsystem, the other end of described first resistance is connected with described push-button unit;
The negative electrode of the diode be connected with the other end of described first resistance, the anode of described diode is connected with the interruptive port of described baseband chip;
The collector electrode of the first triode be connected with the other end of described first resistance, the grounded emitter of described first triode;
The second resistance be connected with the base stage of described first triode, the other end of described second resistance is connected with the control port of described baseband chip;
The base stage of the second triode be connected with the other end of described first resistance, the emitter of described second triode is connected with described power subsystem, and the collector electrode of described second triode is connected with described luminescence unit.
Further, described control unit also comprises
Be connected to the 3rd resistance between described diode cathode and the first transistor collector and
Be connected to the 4th resistance between described first transistor collector and the second transistor base.
Further, described control unit also comprises
The 5th resistance be connected with described first transistor base, described 5th resistance other end ground connection;
The electric capacity be connected with described second transistor base, described electric capacity other end ground connection.
Further, described control unit also comprises
Be connected to the 6th resistance between the collector electrode of described second triode and luminescence unit.
Further, described luminescence unit is light-emitting diode.
Further, described push-button unit is a push-button switch.
The utility model additionally provides a kind of mobile terminal, comprises baseband chip, also comprises described flashlight drive circuit.
The utility model opens flashlight function by a push-button unit, when mobile terminal is in start or holding state, just can open flashlight function by this push-button unit; When mobile terminal is in off-mode, also can grows push-button unit in due order and open flashlight function.The flashlight driving circuit structure that the utility model provides is simple, easy to operate, cost is lower.
Accompanying drawing explanation
The following description carried out in conjunction with the drawings, the above-mentioned and other side of embodiment of the present utility model, feature and advantage will become clearly, in accompanying drawing:
Fig. 1 is the schematic diagram of flashlight drive circuit;
Fig. 2 is the concrete schematic diagram of one of flashlight drive circuit;
Fig. 3 is a kind of concrete circuit diagram of flashlight drive circuit;
Fig. 4 is mobile terminal circuit structural representation.
Embodiment
Below, embodiment of the present utility model is described in detail with reference to the accompanying drawings.But, the utility model can be implemented in many different forms, and the utility model should not be interpreted as being limited to the specific embodiment of setting forth here.On the contrary, provide these embodiments to be to explain principle of the present utility model and practical application thereof, thus enable others skilled in the art understand various embodiment of the present utility model and be suitable for the various amendments of certain expected application.
With reference to Fig. 1, the utility model provides a kind of mobile terminal flashlight drive circuit, comprises power subsystem 1, control unit 2, push-button unit 3, luminescence unit 4.Described push-button unit 3 is connected with one end of described power subsystem 1, its other end ground connection; Described control unit 2 is connected with described push-button unit 3, and described control unit 2 is also connected with described power subsystem 1; Described luminescence unit 4 is connected with described control unit 2, described luminescence unit 4 other end ground connection.Wherein, described push-button unit 3 can be designed as a push-button switch of mobile terminal, by the closed unlatching flashlight function of push-button switch.
With reference to Fig. 2, Fig. 2 provides the concrete schematic diagram of one of described flashlight drive circuit, wherein, described mobile terminal comprises baseband chip 5, described baseband chip 5 comprises interruptive port 5a and control port 5b, when described mobile terminal is in start or holding state, described baseband chip is connected by described interruptive port 5a and control port 5b with described flashlight drive circuit and controls it.Described control unit 2 comprises the first resistance 11, diode 12, first triode 13, second resistance 14, second triode 15.Described first resistance 11 is connected with one end of described power subsystem 1, and the other end of described first resistance 11 is connected with described push-button unit 3; The negative electrode of described diode 12 is connected with the other end of described first resistance 11, and the anode of described diode 12 is connected with the interruptive port of described baseband chip 5; The collector electrode of described first triode 13 is connected with described first resistance 11, the grounded emitter of described first triode 13; Described second resistance 14 is connected with the base stage of described first triode 13, and the other end of described second resistance 14 is connected with the control port 5b of described baseband chip 5; Described second triode 15 base stage is connected with described first resistance 11, emitter is connected with described power subsystem 1, collector electrode is connected with described luminescence unit.Wherein, described first resistance 11 and the second resistance 14 are pull-up resistor.Preferably, described first triode 13 is NPN type, and described second triode 15 is positive-negative-positive.
Preferably, described luminescence unit 4 is light-emitting diode (LED), and its anode is connected with the collector electrode of described second triode 15, its minus earth.
Described mobile terminal-opening or standby time, the anode of described diode 12 is connected with described baseband chip 5 by described interruptive port 5a, and it is high level; When described push-button unit 3 closes, the negative electrode of described diode 12 is dragged down as low level, now described diode 12 conducting, described baseband chip 5 respond described push-button unit 3 interruption and by the level of control unit 2 described in described control port 5b control inputs height.When the level of described control port 5b is high level, the base voltage of described first triode 13 is the voltage at described second resistance 14 two ends, the base voltage of described first triode 13 is high level, according to the on state characteristic of NPN type triode, now, described first triode 13 is in conducting state, the current collection very low level of described first triode 13, namely the base stage of described second triode 15 is connected with the collector electrode of described first triode 13 with described first resistance 11, so, the base stage of described second triode 15 is low level, according to the on state characteristic of PNP type triode, now, described second triode 15 is in conducting state, described power subsystem 1, second triode 15, luminescence unit 4 is in path, described power subsystem 1 is powered for described luminescence unit 4, described luminescence unit 4 is luminous, namely flashlight function is opened, when the level of described control port 5b is low level, the base stage of described first triode 13 is low level, according to the on state characteristic of NPN type triode, now, described first triode 13 is in cut-off state, the base stage of described second triode 15 is connected with described first resistance 11, its base voltage is the voltage at described first resistance 11 two ends, be high level, according to the on state characteristic of PNP type triode, now, described second triode 15 is in cut-off state, described power subsystem 1, second triode 15, luminescence unit 4 is in open circuit, described power subsystem 1 can not be powered for described luminescence unit 4, described luminescence unit 4 is not luminous.
When described mobile terminal shutdown, anode and the described interruptive port 5a of described diode 12 disconnect, and described diode 12 is in cut-off state, and described second resistance 14 also disconnects with described control port 5b, and now, described first triode 13 is in cut-off state.When described push-button unit 3 closes, described second triode 15 base voltage is dragged down as low level by described push-button unit 3, according to the on state characteristic of PNP type triode, now, described second triode 15 is in conducting state, and described power subsystem 1, second triode 15, luminescence unit 4 are in path, and described power subsystem 1 is powered for described luminescence unit 4, described luminescence unit 4 is luminous, namely opens flashlight function.When described push-button unit 3 disconnects, described second triode 15 base voltage is the voltage at described first resistance 12 two ends, be high level, according to the on state characteristic of PNP type triode, now, described second triode 15 is in cut-off state, and described power subsystem 1, second triode 15, luminescence unit 4 are in open circuit, described power subsystem 1 can not be powered for described luminescence unit 4, and described luminescence unit 4 is not luminous.So when the shutdown of described mobile terminal, in order to, described push-button unit 3 must be maintained for a long time and be in closure state and can open flashlight function.
In addition, in order to better flashlight function can be realized, described control unit 2 also comprises the 3rd resistance 16 be connected between described diode 12 negative electrode and described first triode 13 collector electrode, be connected to the 4th resistance 17 between described first triode 13 collector electrode and described second triode 15 base stage, the 5th resistance 18 be connected with described first triode 13 base stage, the electric capacity 19 be connected with described second triode 15 base stage, be connected to the 6th resistance 20 between the collector electrode of described second triode 15 and luminescence unit 4, described 5th resistance 18, electric capacity 19 other end ground connection.The 3rd resistance 16 of telling, the 4th resistance 17 are for dividing potential drop, for described second triode 15 provides necessary bias voltage, described 5th resistance 18 is also for dividing potential drop, for described first triode 13 provides necessary bias voltage, described electric capacity 19 is for moving back lotus root, described 6th resistance 20 plays the effect of current limliting, for preventing from flowing through the overtension of described luminescence unit 4 and burning out described luminescence unit.
With reference to a kind of concrete circuit diagram that Fig. 3, Fig. 3 are flashlight drive circuit, wherein, interruptive port is INT, and control port is END, and push-button unit is an interrupteur SW, and power subsystem is VCC.Described control unit 2 comprises the first resistance R1, diode D1, the first triode Q1, the second resistance R2, the second triode Q3.Wherein, described R1 and R2 is pull-up resistor.Preferably, described Q1 is NPN type, and described Q2 is positive-negative-positive, and described luminescence unit 4 is LED.In addition, described control unit 2 also comprises the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, electric capacity C, the 6th resistance R6.Wherein, R3, R4 are used for dividing potential drop, for Q2 provides necessary bias voltage; R5 is also for dividing potential drop, and for Q1 provides necessary bias voltage, lotus root is moved back in acting as of electric capacity C, and R6 act as current limliting, burns out LED for preventing from flowing through the overtension of LED.
Concrete, described mobile terminal-opening or standby time, the anode of D1 is connected with described baseband chip by interruptive port INT, and it is high level; When SW closes, the negative electrode of D1 is dragged down as low level, now D1 conducting, the interruption of described baseband chip response SW by the level height of control unit 2 described in control port END control inputs.When the level of END is high level, the base voltage of Q1 is the voltage at R2 two ends, the base voltage of Q1 is high level, according to the on state characteristic of NPN type triode, now, Q1 is in conducting state, the current collection very low level of Q1, the base stage of Q2 is connected with R4 and is namely connected with the collector electrode of Q1, so the base stage of Q2 is low level, according to the on state characteristic of PNP type triode, now, Q2 is in conducting state, and VCC, Q2, R6, LED are in path, and VCC is that LED powers, LED is luminous, namely opens flashlight function; When the level of END is low level, the base stage of Q1 is low level, according to the on state characteristic of NPN type triode, now, Q1 is in cut-off state, and the base stage of Q2 is connected with R4, its base voltage is the voltage at R4 two ends, be high level, according to the on state characteristic of PNP type triode, now, Q2 is in cut-off state, VCC, Q2, R6, LED are in open circuit, and VCC can not power for LED, and LED is not luminous.
When described mobile terminal shutdown, the anode of D1 and INT disconnect, and D1 is in cut-off state, and R2 also disconnects with END, and now, Q1 is in cut-off state.When SW closes, Q2 base voltage is dragged down as low level by SW, and according to the on state characteristic of PNP type triode, now, Q2 is in conducting state, and VCC, Q2, R6, LED are in path, and VCC is that LED powers, and LED is luminous, namely opens flashlight function.When SW disconnects, Q2 base voltage is the voltage at R4 two ends, is high level, and according to the on state characteristic of PNP type triode, now, Q2 is in cut-off state, and VCC, Q2, R6, LED are in open circuit, and VCC can not power for LED, and LED is not luminous.So when the shutdown of described mobile terminal, SW must be maintained for a long time and be in closure state and can open flashlight function.
With reference to Fig. 4, the present embodiment additionally provides a kind of mobile terminal, comprises baseband chip 5, also comprises described flashlight drive circuit, and described baseband chip 5 is connected with the control unit 2 in described flashlight drive circuit.When described mobile terminal is in start or holding state, described baseband chip 5 realizes opening or closing flashlight function by the incoming level height controlling described control unit 2.In actual mechanical process, the push-button unit 3 in described flashlight drive circuit by arranging a switch key on the mobile terminal, can realize unlatching or the closedown of flashlight by pressing described switch key.
The above is only the embodiment of the application; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection range of the application.
Claims (9)
1. a mobile terminal flashlight drive circuit, described mobile terminal comprises baseband chip, described baseband chip is provided with interruptive port and control port, it is characterized in that, described flashlight drive circuit comprises:
Power subsystem;
The push-button unit be connected with described power subsystem one end, described push-button unit other end ground connection;
Control unit, described control unit is connected with described push-button unit, described power subsystem respectively;
The luminescence unit be connected with described control unit, described luminescence unit other end ground connection.
2. drive circuit according to claim 1, is characterized in that, described control unit comprises:
The first resistance be connected with one end of described power subsystem, the other end of described first resistance is connected with described push-button unit;
The negative electrode of the diode be connected with the other end of described first resistance, the anode of described diode is connected with the interruptive port of described baseband chip;
The collector electrode of the first triode be connected with the other end of described first resistance, the grounded emitter of described first triode;
The second resistance be connected with the base stage of described first triode, the other end of described second resistance is connected with the control port of described baseband chip;
The base stage of the second triode be connected with the other end of described first resistance, the emitter of described second triode is connected with described power subsystem, and the collector electrode of described second triode is connected with described luminescence unit.
3. drive circuit according to claim 2, is characterized in that, described control unit also comprises:
Be connected to the 3rd resistance between described diode cathode and the first transistor collector, and
Be connected to the 4th resistance between described first transistor collector and the second transistor base.
4. the drive circuit according to Claims 2 or 3, is characterized in that, described control unit also comprises:
The 5th resistance be connected with described first transistor base, described 5th resistance other end ground connection;
The electric capacity be connected with described second transistor base, described electric capacity other end ground connection.
5. the drive circuit according to Claims 2 or 3, is characterized in that, described control unit also comprises: be connected to the 6th resistance between the collector electrode of described second triode and luminescence unit.
6. drive circuit according to claim 1, is characterized in that, described luminescence unit is light-emitting diode.
7. drive circuit according to claim 1, is characterized in that, described push-button unit is push-button switch.
8. a mobile terminal, comprises baseband chip, described baseband chip is provided with interruptive port and control port, it is characterized in that, also comprises flashlight drive circuit, and described flashlight drive circuit comprises:
Power subsystem;
The push-button unit be connected with described power subsystem one end, described push-button unit other end ground connection;
Control unit, described control unit is connected with described push-button unit, described power subsystem respectively;
The luminescence unit be connected with described control unit, described luminescence unit other end ground connection.
9. mobile terminal according to claim 8, is characterized in that, described control unit comprises:
The first resistance be connected with one end of described power subsystem, the other end of described first resistance is connected with described push-button unit;
The negative electrode of the diode be connected with the other end of described first resistance, the anode of described diode is connected with the interruptive port of described baseband chip;
The collector electrode of the first triode be connected with the other end of described first resistance, the grounded emitter of described first triode;
The second resistance be connected with the base stage of described first triode, the other end of described second resistance is connected with the control port of described baseband chip;
The base stage of the second triode be connected with the other end of described first resistance, the emitter of described second triode is connected with described power subsystem, and the collector electrode of described second triode is connected with described luminescence unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520794234.8U CN205124050U (en) | 2015-10-12 | 2015-10-12 | Mobile terminal and flashlight drive circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520794234.8U CN205124050U (en) | 2015-10-12 | 2015-10-12 | Mobile terminal and flashlight drive circuit thereof |
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| Publication Number | Publication Date |
|---|---|
| CN205124050U true CN205124050U (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520794234.8U Expired - Fee Related CN205124050U (en) | 2015-10-12 | 2015-10-12 | Mobile terminal and flashlight drive circuit thereof |
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| CN (1) | CN205124050U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107404549A (en) * | 2017-08-14 | 2017-11-28 | 广东欧珀移动通信有限公司 | Mobile terminal and its flashlight drive circuit |
| CN113099586A (en) * | 2021-04-16 | 2021-07-09 | 佛山市威格特电气设备有限公司 | Flashlight control circuit based on intelligent helmet |
-
2015
- 2015-10-12 CN CN201520794234.8U patent/CN205124050U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107404549A (en) * | 2017-08-14 | 2017-11-28 | 广东欧珀移动通信有限公司 | Mobile terminal and its flashlight drive circuit |
| CN113099586A (en) * | 2021-04-16 | 2021-07-09 | 佛山市威格特电气设备有限公司 | Flashlight control circuit based on intelligent helmet |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20171012 |
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| CF01 | Termination of patent right due to non-payment of annual fee |