CN107172741A - The change-over circuit of mobile terminal and its flash lamp and indicator lamp - Google Patents
The change-over circuit of mobile terminal and its flash lamp and indicator lamp Download PDFInfo
- Publication number
- CN107172741A CN107172741A CN201710380403.7A CN201710380403A CN107172741A CN 107172741 A CN107172741 A CN 107172741A CN 201710380403 A CN201710380403 A CN 201710380403A CN 107172741 A CN107172741 A CN 107172741A
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- led
- change
- over circuit
- lamp
- load
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims 1
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Telephone Function (AREA)
Abstract
The present invention provides the change-over circuit of a kind of mobile terminal and its flash lamp and indicator lamp, the change-over circuit includes current regulating circuit, LED and drive circuit, the LED is connected with the current regulating circuit, drive circuit respectively, the drive circuit is used to drive the LED to light, the current regulating circuit is used for the size for adjusting the driving current for flowing through the LED, and indicator lamp is used as to cause the LED when the first driving current is flowed through as flash lamp and when the second driving current is flowed through.Flash lamp shares a LED and drive circuit with indicator lamp, reduces cost, improves outward appearance.
Description
Technical field
The present invention relates to communication of mobile terminal technical field, more particularly to a kind of mobile terminal and its flash lamp and indicator lamp
Change-over circuit.
Background technology
With the development of the communication technology, mobile phone turns into indispensable mobile device in people's daily life.Wherein, image
Head is the essential device of mobile phone, in order to lift the quality of the photo captured by camera, is generally set beside camera
Flash lamp is put, light filling is carried out to photographed scene by flash lamp.In addition, some indicator lamps can be also installed on mobile phone, for example, charging
Indicator lamp.The flash lamp and the light source of charging indicator light configured in the market on mobile phone is all lighted using LED and using different
Drive circuit, in structure design, flash lamp and charging indicator light are required for designing in independent perforate.Therefore, it is existing to dodge
Light lamp and charging indicator light design cost are higher, influence attractive in appearance.
The content of the invention
In order to solve the deficiencies in the prior art, the present invention provides the conversion of a kind of mobile terminal and its flash lamp and indicator lamp
Circuit, flash lamp shares a LED and same one drive circuit with indicator lamp, reduces cost, improves outward appearance.
Concrete technical scheme proposed by the present invention is：The change-over circuit of a kind of flash lamp and indicator lamp, the conversion are provided
Circuit include current regulating circuit, LED and drive circuit, the LED respectively with the current regulating circuit, drive circuit
Connection, the drive circuit is used to drive the LED to light, and the current regulating circuit flows through the LED for regulation
Driving current size, using cause the LED when the first driving current is flowed through as flash lamp and second driving electricity
Indicator lamp is used as when stream is flowed through.
Further, the current regulating circuit includes the first load unit, control unit and switch element, the control
Unit is used to controlling the on/off of the switch element, the switch element be used for when disconnecting will first load unit and
The LED conducting, to cause the LED to be used as indicator lamp when the second driving current is flowed through.
Further, the switch element includes transistor, and the drain electrode of the transistor is single with the described first load respectively
The negative pole connection of member, LED, the grid of the transistor is connected with described control unit, the source ground of the transistor.
Further, the drive circuit includes the second load unit and power supply unit, the second load unit difference
Positive pole, power supply unit with the LED are connected.
Further, said supply unit includes power supply and filter capacitor, the positive pole of the power supply and the described second load
Unit is connected, and the positive pole of the power supply is grounded by the filter capacitor, the negative pole ground connection of the power supply.
Further, first load unit includes load resistance, and the load resistance is connected with the LED.
Further, the indicator lamp is charging indicator light, and first load unit also includes and the load resistance
The power management chip of connection.
Further, the indicator lamp is lighting pilot lamp, and first load unit also includes and the load resistance
The lighting controller of connection.
Further, first driving current is more than second driving current.
Present invention also offers a kind of mobile terminal, the mobile terminal includes flash lamp as described above and indicator lamp
Change-over circuit.
The change-over circuit of mobile terminal and its flash lamp and indicator lamp proposed by the present invention, the change-over circuit includes electric current
Circuit, LED and drive circuit are adjusted, current regulating circuit is used for the size for adjusting the driving current for flowing through the LED, when
When first driving current flows through the LED, LED is used as flash lamp；When the second driving current flows through the LED, LED
Lamp shares a LED and drive circuit with indicator lamp, reduces cost, improves outward appearance as indicator lamp, flash lamp.
Brief description of the drawings
Below in conjunction with the accompanying drawings, it is described in detail by the embodiment to the present invention, technical scheme will be made
And other beneficial effects are apparent.
Fig. 1 is the structural representation of mobile terminal；
Fig. 2 is the schematic diagram of the change-over circuit of flash lamp and indicator lamp；
Fig. 3 is another schematic diagram of the change-over circuit of flash lamp and indicator lamp；
Fig. 4 is the physical circuit schematic diagram of the change-over circuit of flash lamp and indicator lamp.
Embodiment
Hereinafter, with reference to the accompanying drawings to embodiments of the invention are described in detail.However, it is possible to come real in many different forms
Apply the present invention, and the specific embodiment of the invention that should not be construed as limited to illustrate here.It is opposite that there is provided these implementations
Example is in order to explain the principle and its practical application of the present invention, so that others skilled in the art are it will be appreciated that the present invention
Various embodiments and be suitable for the various modifications of specific intended application.In the accompanying drawings, identical label will be used for table all the time
Show identical element.
Reference picture 1, Fig. 2, the mobile terminal that the present embodiment is provided include housing 1, the flash lamp and finger being arranged in housing 1
Show the change-over circuit of lamp, the change-over circuit of flash lamp and indicator lamp includes current regulating circuit 10, LED 20 and drive circuit
30, wherein, LED 20 is the flash lamp of the front camera of mobile terminal, and it is arranged at display of the housing 1 towards mobile terminal
The one side of screen and the upper end for being located at housing 1.LED 20 is connected with current regulating circuit 10, drive circuit 30 respectively, drive circuit
30 are used to drive LED 20 to light, and current regulating circuit 10 is used for the size for adjusting the driving current for flowing through LED 20.When
When one driving current flows through LED 20, LED 20 is used as flash lamp；When the second driving current flows through LED 20, LED 20
It is used as indicator lamp.Wherein, the size of the first driving current is more than the size of the second driving current, so, and LED 20 is used as flash of light
The luminous flux of lamp is more than LED 20 as the luminous flux of indicator lamp.One LED 20 is shared by flash lamp and indicator lamp and driven
Dynamic circuit 30, reduces cost, improves outward appearance.
Reference picture 3, current regulating circuit 10 includes the first load unit 11, control unit 12 and switch element 13.First
Load unit 11, control unit 12 are connected with switch element 13 respectively, and switch element 13 is connected with LED 20.Control unit 12
For the on/off of controlling switch unit 13, when switch element 13 disconnects, the first load unit 11 is turned on LED 20, this
When, the size of current for flowing through LED 20 is equal to the size of the second driving current, and LED 20 is used as indicator lamp；When switch element 13
During conducting, the first load unit 11 disconnects with LED 20, now, and the size of current for flowing through LED 20 is equal to the first driving current
Size, LED 20 is used as flash lamp.
Reference picture 4, specifically, switch element 13 include transistor T, transistor T be NMOS, it include drain, grid and
Source electrode.Wherein, transistor T negative pole of the drain electrode respectively with the first load unit 11, LED 20 be connected, transistor T grid and
Control unit 12 is connected, transistor T source ground.When the input voltage of the controlling transistor T of control unit 12 grid is height
During level, transistor T conductings, the negative pole of LED 20 is grounded by transistor T, now, flows through size of current of LED 20 etc.
In the size of the first driving current, LED 20 is used as flash lamp.When the input electricity of the controlling transistor T of control unit 12 grid
When pressing as low level, transistor T is disconnected, and the negative pole of LED 20 is connected with the first load unit 11, now, flows through LED 20
Size of current is equal to the size of the second driving current, and LED 20 is used as indicator lamp.
Drive circuit 30 includes the second load unit 31 and power supply unit 32, and the second load unit 31 includes resistance R1, the
Positive pole, the power supply unit 32 of two load units 31 respectively with LED 20 are connected.Specifically, power supply unit 32 includes power supply Vbat
With filter capacitor C1, power supply Vbat positive pole is connected with resistance R1, and power supply Vbat positive pole is grounded by filter capacitor C1, power supply
Vbat negative pole ground connection, filter capacitor C1 is used to be filtered power supply Vbat.
First load unit 11 includes load resistance R2, and load resistance R2 is connected with the negative pole of LED 20.In actual design
During, load resistance R1 and load resistance R2 resistance can be arranged as required to, so that change the luminous flux of LED 20,
So that different brightness are presented in LED 20.
Indicator lamp is charging indicator light in an embodiment of the present embodiment, and now, the first load unit 11 is also wrapped
Include the power management chip PMIC being connected with load resistance R2, power management chip PMIC connection charge power supplies, in charging process
In, power management chip PMIC controls flow through size of the size equal to the second driving current of the electric current of LED 20, to cause LED
Lamp 20 is used as charging indicator light.After charging terminates, power management chip PMIC controls flow through the electric current of LED 20, to cause LED
Lamp 20 is closed.
Indicator lamp is lighting pilot lamp in another embodiment of the present embodiment, and now, the first load unit 11 is also wrapped
The lighting controller being connected with load resistance R2 is included, lighting controller connects power supply, when LED 20 is as indicator lamp,
Lighting controller control flows through size of the size equal to the 3rd driving current of the electric current of LED 20, to cause LED 20 as photograph
Bright indicator lamp.When that need not illuminate, lighting controller control flows through the electric current of LED 20, to cause LED 20 to close.
Described above is only the embodiment of the application, it is noted that for the ordinary skill people of the art
For member, on the premise of the application principle is not departed from, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as the protection domain of the application.
Claims (10)
1. the change-over circuit of a kind of flash lamp and indicator lamp, it is characterised in that the change-over circuit include current regulating circuit,
LED and drive circuit, the LED are connected with the current regulating circuit, drive circuit respectively, and the drive circuit is used for
The LED is driven to light, the current regulating circuit is used for the size for adjusting the driving current for flowing through the LED, so that
The LED when the first driving current is flowed through as flash lamp and when the second driving current is flowed through as indicator lamp.
2. change-over circuit according to claim 1, it is characterised in that it is single that the current regulating circuit includes the first load
Member, control unit and switch element, described control unit are used for the on/off for controlling the switch element, and the switch element is used
First load unit and the LED are turned on when disconnecting, to cause the LED to be flowed through in the second driving current
Shi Zuowei indicator lamps.
3. change-over circuit according to claim 2, it is characterised in that the switch element includes transistor, the crystal
Negative pole of the drain electrode of pipe respectively with first load unit, LED is connected, the grid and described control unit of the transistor
Connection, the source ground of the transistor.
4. change-over circuit according to claim 2, it is characterised in that the drive circuit includes the second load unit and confession
Electric unit, positive pole, the power supply unit of second load unit respectively with the LED is connected.
5. change-over circuit according to claim 4, it is characterised in that said supply unit includes power supply and filter capacitor,
The positive pole of the power supply is connected with second load unit, and the positive pole of the power supply is grounded by the filter capacitor, described
The negative pole ground connection of power supply.
6. change-over circuit according to claim 2, it is characterised in that first load unit includes load resistance, institute
Load resistance is stated to be connected with the LED.
7. change-over circuit according to claim 6, it is characterised in that the indicator lamp is charging indicator light, described first
Load unit also includes the power management chip being connected with the load resistance.
8. change-over circuit according to claim 6, it is characterised in that the indicator lamp is lighting pilot lamp, described first
Load unit also includes the lighting controller being connected with the load resistance.
9. the change-over circuit according to claim any one of 1-8, it is characterised in that first driving current is more than described
Second driving current.
10. a kind of mobile terminal, it is characterised in that including the flash lamp as described in claim any one of 1-9 and indicator lamp
Change-over circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710380403.7A CN107172741B (en) | 2017-05-25 | 2017-05-25 | The conversion circuit of mobile terminal and its flash lamp and indicator light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710380403.7A CN107172741B (en) | 2017-05-25 | 2017-05-25 | The conversion circuit of mobile terminal and its flash lamp and indicator light |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107172741A true CN107172741A (en) | 2017-09-15 |
| CN107172741B CN107172741B (en) | 2019-06-25 |
Family
ID=59820702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710380403.7A Active CN107172741B (en) | 2017-05-25 | 2017-05-25 | The conversion circuit of mobile terminal and its flash lamp and indicator light |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107172741B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107635311A (en) * | 2017-10-10 | 2018-01-26 | 浙江国自机器人技术有限公司 | The power supply circuit and printed circuit board (PCB) of a kind of LED array |
| CN112423440A (en) * | 2020-11-10 | 2021-02-26 | 珠海银河智能电网有限公司 | Indicating lamp circuit, control method and device, power supply equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2032345U (en) * | 1986-11-10 | 1989-02-08 | 吴正德 | Dual purpose lamp for sos calling for help signal and light flash indication |
| CN1534974A (en) * | 2003-03-31 | 2004-10-06 | 联想(北京)有限公司 | Communication terminal device and its flash light lamp control method |
| CN201450532U (en) * | 2009-06-04 | 2010-05-05 | 宇龙计算机通信科技(深圳)有限公司 | Movable terminal |
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| CN104301475A (en) * | 2013-07-17 | 2015-01-21 | 联芯科技有限公司 | Mobile terminal provided with functions of flash lamp and electric torch |
| CN204316849U (en) * | 2015-01-26 | 2015-05-06 | 上海卓悠网络科技有限公司 | A kind of circuit structure and mobile terminal having photoflash lamp and signal lamp function concurrently |
| CN105162905A (en) * | 2015-07-30 | 2015-12-16 | 万辽辽 | Circuit structure having functions of both flash lamp and signal lamp and mobile terminal |
-
2017
- 2017-05-25 CN CN201710380403.7A patent/CN107172741B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2032345U (en) * | 1986-11-10 | 1989-02-08 | 吴正德 | Dual purpose lamp for sos calling for help signal and light flash indication |
| CN1534974A (en) * | 2003-03-31 | 2004-10-06 | 联想(北京)有限公司 | Communication terminal device and its flash light lamp control method |
| CN201450532U (en) * | 2009-06-04 | 2010-05-05 | 宇龙计算机通信科技(深圳)有限公司 | Movable terminal |
| CN202435455U (en) * | 2012-01-12 | 2012-09-12 | 深圳天珑移动技术股份有限公司 | Mobile terminal with currency detecting and illuminating functions |
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| CN204316849U (en) * | 2015-01-26 | 2015-05-06 | 上海卓悠网络科技有限公司 | A kind of circuit structure and mobile terminal having photoflash lamp and signal lamp function concurrently |
| CN105162905A (en) * | 2015-07-30 | 2015-12-16 | 万辽辽 | Circuit structure having functions of both flash lamp and signal lamp and mobile terminal |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107635311A (en) * | 2017-10-10 | 2018-01-26 | 浙江国自机器人技术有限公司 | The power supply circuit and printed circuit board (PCB) of a kind of LED array |
| CN107635311B (en) * | 2017-10-10 | 2019-06-18 | 浙江国自机器人技术有限公司 | A kind of power supply circuit and printed circuit board of LED array |
| CN112423440A (en) * | 2020-11-10 | 2021-02-26 | 珠海银河智能电网有限公司 | Indicating lamp circuit, control method and device, power supply equipment and storage medium |
| CN112423440B (en) * | 2020-11-10 | 2023-10-20 | 珠海银河智能电网有限公司 | Indicator light circuit, control method and device, power supply equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107172741B (en) | 2019-06-25 |
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Effective date of registration: 20240112 Address after: Room 501, 85 Xiaguang Dongli, Haicang District, Xiamen City, Fujian Province, 361000 Patentee after: Xiamen reliable intellectual property service Co.,Ltd. Address before: 518057 16th floor, block B, TCL building, South 1st Road, Gaoxin, Nanshan District, Shenzhen City, Guangdong Province Patentee before: JRD COMMUNICATION (SHENZHEN) Ltd. |
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