CN201967197U - Control circuit that a keyboard lamp and the pilot lamp that charges shared - Google Patents
Control circuit that a keyboard lamp and the pilot lamp that charges shared Download PDFInfo
- Publication number
- CN201967197U CN201967197U CN2010206767387U CN201020676738U CN201967197U CN 201967197 U CN201967197 U CN 201967197U CN 2010206767387 U CN2010206767387 U CN 2010206767387U CN 201020676738 U CN201020676738 U CN 201020676738U CN 201967197 U CN201967197 U CN 201967197U
- Authority
- CN
- China
- Prior art keywords
- switch module
- voltage input
- resistance
- keyboard
- control circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Telephone Set Structure (AREA)
- Telephone Function (AREA)
Abstract
The utility model discloses a control circuit of a keyboard lamp and the pilot lamp sharing of charging, and it includes first voltage input, second voltage input, the bright control end that goes out of keyboard lamp, cell-phone baseband chip port extension end, luminotron, first switch module, second switch module, sample module, and wherein, luminotron, first switch module are established ties in proper order between the public node and ground of first voltage input and second voltage input, and the sample module is established ties between second voltage input and ground, and the third end of sample module links to each other with the control end of first switch module, and the second switch module is established ties between public node and ground between sample module and the first switch, and its control end is continuous with cell-phone baseband chip port extension end, and the keyboard lamp shines and goes out the control end and connect between luminotron and first control module. Adopt this utility model can realize the keyboard lamp and the pilot lamp sharing of charging.
Description
Technical field
The utility model relates to a kind of control circuit, in particular a kind of keyboard light and the shared control circuit of charging indicator light.
Background technology
The function of charging indicator light has become one of necessary function in mobile phones design, and the effect of charging indicator light is that the notice user mobile phone charges.Especially it is very low to work as battery of mobile phone voltage, and mobile phone is when precharge, if there is not charging indicator light, the user can't know whether mobile phone charges.In addition, substantially all be provided with keyboard light in the key mobile phone, and keyboard light only when start and button are pressed ability lighted.According to the operating position of these two kinds of lamps, can design the shared control circuit of a kind of keyboard light and charging indicator light and realize that two kinds of lamps are shared.Thereby can solve the problem that two indicator light circuits are set in mobile phone.
The utility model content
The purpose of this utility model is to provide a kind of keyboard light and the shared control circuit of charging indicator light, is intended to solve existing mobile phone the problem that two circuit come supervisory keyboard lamp and charging indicator light need be set.
The technical solution of the utility model is as follows: the control circuit that a kind of keyboard light and charging indicator light are shared, wherein, comprise first voltage input end, second voltage input end, keyboard light light on and off control end, luminous tube, first switch module, second switch module, sampling module, wherein, first port of sampling module connects described second voltage input end, the second port ground connection of sampling module; Described second voltage input end and first voltage input end all are connected to the anode of luminous tube; The negative electrode of luminous tube connects first port of first switch module, and the 3rd end of sampling module connects the control end of first switch module, the second port ground connection of first switch module, and first port of described first switch module connects keyboard lamp on/off control end; The GPIO end of the control end catcher machine baseband chip of described second switch module is the mobile phone base band chip Extended Capabilities Port, and first port of second switch module connects the control end of first switch module, the second port ground connection of second switch module.
The control circuit that described keyboard light and charging indicator light are shared wherein, is in series with second diode between described first voltage input end and luminous tube; Between described second voltage input end and luminous tube, be in series with the 3rd diode; Between first port of described first switch module and keyboard light light on and off control end, be in series with first diode.
The control circuit that described keyboard light and charging indicator light are shared, wherein, the anode of described luminous tube is provided with a ground capacity.
The control circuit that described keyboard light and charging indicator light are shared wherein, is connected between first port of the negative electrode of described luminous tube and first switch module brightness regulation module is set.
The control circuit that described keyboard light and charging indicator light are shared, wherein, described sampling module comprises first resistance and second resistance, and first resistance is connected with second resistance, one end of described first resistance connects described second voltage input end, one end ground connection of described second resistance, first resistance are connected the control end of first switch module with the common port of second resistance.
The control circuit that described keyboard light and charging indicator light are shared, wherein, described first switch module and second switch module are field effect transistor, and the control end of the control end of described first switch module and described second switch module is the grid of field effect transistor.
The control circuit that described keyboard light and charging indicator light are shared, wherein, described brightness regulation module is a current-limiting resistance.
The control circuit that described keyboard light and charging indicator light are shared, wherein, with the value of the value of second resistance R 2 design greater than first resistance R 1.
The control circuit that described keyboard light and charging indicator light are shared, wherein, described first voltage input end is the cell voltage input.
The control circuit that described keyboard light and charging indicator light are shared, wherein, described second voltage input end is the charging voltage input.
The beneficial effects of the utility model: the utility model proposes the shared control circuit of keyboard light and charging indicator light and can realize one or more shared for charging indicator light with in the keyboard light economizing on resources like this, can also be the handset structure simplicity of design.
Description of drawings
Keyboard light and the shared control circuit schematic diagram of charging indicator light that Fig. 1 provides for the utility model.
The physical circuit figure of the control circuit that Fig. 2 provides for the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, clear and definite, below the utility model is further described with reference to the accompanying drawing embodiment that develops simultaneously.
Referring to Fig. 1, the control circuit that the utility model provides comprises two voltage input ends, the first voltage input end VBAT and the second voltage input end VCHG; A keyboard light light on and off control end Key_LED; Also comprise luminous tube LED1, first switch module, second switch module, sampling module.First port one 01 of described sampling module connects the second voltage input end VCHG, second port one, 02 ground connection of described sampling module; The described second voltage input end VCHG and the first voltage input end VBAT all are connected to the anode of luminous tube LED1; The negative electrode of described luminous tube LED1 connects first port 201 of first switch module, and the 3rd end 103 of described sampling module connects second port, 202 ground connection of control end 203, the first switch modules of first switch module.First port 201 of described first switch module connects keyboard lamp on/off control end Key_LED.Described luminous tube LED1 is keyboard light and the shared lamp of charging indicator light.
The expansion end of the control end catcher machine baseband chip of described second switch module is the GPIO end, and first port 301 of second switch module connects the control end 203 of first switch module, second port, 302 ground connection of second switch module.For the safety of the GPIO port of protecting mobile phone base band chip is provided with an earth resistance R3 at the control end 303 of described second switch module.
In order to guarantee the fail safe of circuit, between described first voltage input end VBAT and luminous tube LED1, be in series with the second diode D2; In like manner, between described second voltage input end VCHG and luminous tube LED1, be in series with the 3rd diode D3.Between first port 201 of described first switch module and keyboard light light on and off control end Key_LED, be in series with the first diode D1.The anode of described luminous tube LED1 is provided with a ground capacity C1.
Connect between first port 201 of the negative electrode of described luminous tube LED1 and first switch module for the brightness that can regulate described luminous tube LED1 and to be provided with the brightness regulation module.
Referring to Fig. 2, the concrete control circuit that the utility model embodiment provides, described sampling module is that the resistance of two series connection is formed, be respectively first resistance R 1, second resistance R 2, first end 101 of described sampling module is an end of first resistance R 1, second end 102 of described sampling module is an end of second resistance R 2, and the 3rd end 103 of described sampling module is the common port of first resistance R 1 and second resistance R 2.
Described first switch module and second switch module are field effect transistor, are respectively the first field effect transistor Q1 and the second field effect transistor Q2.The grid of the described first field effect transistor Q1 is the control end 203 of first switch module, and the source electrode of the described first field effect transistor Q1 is second end 202 of first switch module, and the drain electrode of the described first field effect transistor Q1 is first end 201 of first switch module.The grid of the described second field effect transistor Q2 is the control end 303 of second switch module, and the source electrode of the described second field effect transistor Q2 is second end 302 of second switch module, and the drain electrode of the described second field effect transistor Q2 is first end 301 of second switch module.
Described brightness regulation module is a current-limiting resistance R4 because the brightness of keyboard light and charging indicator light does not need real-time regulated, thereby can be in advance as required brightness set the value of R4, can obtain the different brightness of lamp by the size of selecting R4.
The operation principle of the control circuit that present embodiment provides is: luminous tube LED1 is keyboard light and the shared lamp of charging indicator light among the figure, because charging indicator light only needs a lamp, and perhaps more than one of keyboard light, this circuit only draw shared lamp, i.e. luminous tube LED1.VCHG is a charging voltage; VBAT is a cell voltage; Key_LED is the control end of keyboard light, if mobile phone has other keyboard light also by its control; GPIO is one of a mobile phone base band chip control pin, and this GPIO need give tacit consent to and is output as low level.Resistance R 4 is current-limiting resistances of luminous tube LED1, and the size of regulating current-limiting resistance R4 can obtain the different brightness of lamp because the brightness of keyboard light and charging indicator light does not need real-time regulated, thereby can be in advance as required brightness set the value of R4.
The effect of the first diode D1 is to prevent when the first field effect transistor Q1 conducting, and Key_LED pin electric current backflow enters the first field effect transistor Q1 to ground.The effect of the second diode D2 is to prevent that charging voltage VCHG from directly entering the VBAT end, if directly enter the VBAT end with regard to uncontrollable charging.The effect of the 3rd diode D3 is to prevent that the voltage of VBAT end is input to the VCHG end, can cause that the erroneous judgement of charging is disconnected if the voltage of VBAT end is directly inputted to the VCHG end.When the second field effect transistor Q2 by the time, the drain voltage VD2 of the grid voltage VG1 of the first field effect transistor Q1 and the second field effect transistor Q2 obtains by first resistance R 1 and second resistance R, 2 dividing potential drops, its voltage is VR2, that is:
With the value of the value of second resistance R 2 design, to satisfy the first field effect transistor Q1, the conducting voltage that the second field effect transistor Q2 needs greater than first resistance R 1.The value of general R1 is selected 10K Europe, and the value of R2 is selected 100K Europe, so the voltage ratio of voltage VR2 is higher, is enough to satisfy the first field effect transistor Q1, the conducting voltage that the second field effect transistor Q2 needs.When the second field effect transistor Q2 conducting, the VR2 level is pulled to low level by the second field effect transistor Q2.
Concrete realization principle is, before inserting charger, system does not have this voltage of VCHG, thereby the grid level of the first field effect transistor Q1 is a low level, the first field effect transistor Q1 is a cut-off state, after plugging charger, obtain voltage VR2 on second resistance R 2, then the grid voltage VG1 of the first field effect transistor Q1 is VR2, and the source ground of the first field effect transistor Q1, be that source voltage VS1 is 0, and the second field effect transistor Q2, because the GPIO of mobile phone base band chip end acquiescence output is low level, promptly the grid voltage of the second field effect transistor Q2 is defaulted as 0 source voltage that equals the second field effect transistor Q2, the second field effect transistor Q2 does not satisfy turn-on condition and is in by state, thereby VG1 is greater than VS1, and the first field effect transistor Q1 satisfies conducting and regulates the first field effect transistor Q1 conducting, electric current flows through the 3rd diode D3 from the VCHG end, luminous tube LED1, current-limiting resistance R4, the first field effect transistor Q1 is to ground, be that luminous tube LED1 lamp is lighted, realize the charging deixis.
After charger is extracted, battery is not extracted, this moment, system did not have this voltage of VCHG, the grid level of the first field effect transistor Q1 is a low level, the first field effect transistor Q1 ends, this moment, luminous tube LED1 lamp bright or go out was to be subjected to the control end Key_LED control of keyboard light, and this moment, luminous tube LED1 used as keyboard light, and the Key_LED end can equally be controlled luminous tube LED1 according to control common keyboard lamp.
When after mobile phone is full of electricity, needing the charge closing indicator light, after mobile phone base band chip detects the battery charge end, control GPIO end output high level, then the grid voltage of the second field effect transistor Q2 is greater than source voltage (because source electrode is connected to ground), so second field effect transistor Q2 conducting, then the VR2 level is pulled to ground by the second field effect transistor Q2, be that VR2 is 0, then the grid of the first field effect transistor Q1 also is 0, so the first field effect transistor Q1 ends, then luminous tube LED1 cannot light by the path of the first field effect transistor Q1, if when keyboard light light on and off this moment control end does not need to light luminous tube LED1 yet, then luminous tube LED1 just was in and extinguished state this moment.
The utility model proposes the shared control circuit of keyboard light and charging indicator light and can realize one or more shared for charging indicator light with in the keyboard light economizing on resources like this, can also be the handset structure simplicity of design.
Should be understood that; application of the present utility model is not limited to above-mentioned giving an example; for those of ordinary skills, can be improved according to the above description or conversion, all these improvement and conversion all should belong to the protection range of the utility model claims.
Claims (10)
1. keyboard light and the shared control circuit of charging indicator light, it is characterized in that, comprise first voltage input end, second voltage input end, keyboard light light on and off control end, mobile phone base band chip port expansion end, luminous tube, first switch module, the second switch module, sampling module, wherein, described luminous tube and described first switch module are series between the common node and ground of described first voltage input end and described second voltage input end successively, described sampling module is series between described second voltage input end and the ground, the 3rd end of described sampling module links to each other with the control end of described first switch module, described second switch module is series between the common node and ground between sampling module and described first switch, its control end links to each other with described mobile phone base band chip port expansion end, and described keyboard light light on and off control end is connected between described luminous tube and described first control module.
2. keyboard light according to claim 1 and the shared control circuit of charging indicator light is characterized in that, are in series with second diode between described first voltage input end and luminous tube; Between described second voltage input end and luminous tube, be in series with the 3rd diode; Between first port of described first switch module and keyboard light light on and off control end, be in series with first diode.
3. keyboard light according to claim 1 and the shared control circuit of charging indicator light is characterized in that the anode of described luminous tube is provided with a ground capacity.
4. keyboard light according to claim 1 and the shared control circuit of charging indicator light is characterized in that, connecting between first port of the negative electrode of described luminous tube and first switch module is provided with a brightness regulation module.
5. keyboard light according to claim 1 and the shared control circuit of charging indicator light, it is characterized in that, described sampling module comprises first resistance and second resistance, and first resistance is connected with second resistance, one end of described first resistance connects described second voltage input end, one end ground connection of described second resistance, first resistance are connected the control end of first switch module with the common port of second resistance.
6. keyboard light according to claim 1 and the shared control circuit of charging indicator light, it is characterized in that, described first switch module and second switch module are field effect transistor, and the control end of the control end of described first switch module and described second switch module is the grid of field effect transistor.
7. keyboard light according to claim 4 and the shared control circuit of charging indicator light is characterized in that described brightness regulation module is a current-limiting resistance.
8. keyboard light according to claim 5 and the shared control circuit of charging indicator light is characterized in that the resistance of second resistance is greater than the resistance of first resistance.
9. keyboard light according to claim 1 and the shared control circuit of charging indicator light is characterized in that described first voltage input end is the cell voltage input.
10. keyboard light according to claim 1 and the shared control circuit of charging indicator light is characterized in that described second voltage input end is the charging voltage input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206767387U CN201967197U (en) | 2010-12-23 | 2010-12-23 | Control circuit that a keyboard lamp and the pilot lamp that charges shared |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206767387U CN201967197U (en) | 2010-12-23 | 2010-12-23 | Control circuit that a keyboard lamp and the pilot lamp that charges shared |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201967197U true CN201967197U (en) | 2011-09-07 |
Family
ID=44529749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206767387U Expired - Fee Related CN201967197U (en) | 2010-12-23 | 2010-12-23 | Control circuit that a keyboard lamp and the pilot lamp that charges shared |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201967197U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102665320A (en) * | 2012-03-22 | 2012-09-12 | 惠州Tcl移动通信有限公司 | Portable electronic equipment and flash lamp control circuit thereof |
| CN103259896A (en) * | 2013-04-15 | 2013-08-21 | 上海摩软通讯技术有限公司 | Mobile terminal |
| CN108882440A (en) * | 2018-05-17 | 2018-11-23 | 珠海市学思电子科技有限公司 | Keyboard light imitates control method, computer installation and computer readable storage medium |
-
2010
- 2010-12-23 CN CN2010206767387U patent/CN201967197U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102665320A (en) * | 2012-03-22 | 2012-09-12 | 惠州Tcl移动通信有限公司 | Portable electronic equipment and flash lamp control circuit thereof |
| CN102665320B (en) * | 2012-03-22 | 2015-11-25 | 惠州Tcl移动通信有限公司 | Portable electric appts and flash control circuit thereof |
| CN103259896A (en) * | 2013-04-15 | 2013-08-21 | 上海摩软通讯技术有限公司 | Mobile terminal |
| CN108882440A (en) * | 2018-05-17 | 2018-11-23 | 珠海市学思电子科技有限公司 | Keyboard light imitates control method, computer installation and computer readable storage medium |
| CN108882440B (en) * | 2018-05-17 | 2019-05-24 | 珠海市学思电子科技有限公司 | Keyboard light imitates control method, computer installation and computer readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103762650B (en) | A kind of single USB port stand-by power supply based on equilibrium charging technology | |
| CN103236832B (en) | The control circuit of logical-sequential control circuit and charged in parallel discharged in series | |
| CN101877495B (en) | Charging indication circuit and portable electronic device applying same | |
| CN101588060A (en) | Temperature protection circuit and a method for preventing battery temperature from being overhigh by using the circuit | |
| CN204967307U (en) | Battery measurement control circuit and battery measurement system | |
| CN201967197U (en) | Control circuit that a keyboard lamp and the pilot lamp that charges shared | |
| CN202513559U (en) | Battery short-circuit protection circuit | |
| CN102830783A (en) | Intelligent power line of notebook computer power | |
| CN103078355A (en) | Battery discharging circuit system | |
| CN101351068A (en) | Controller electricized with PWM mode for light-control timing two-way output solar streetlight | |
| CN211267175U (en) | Emergency LED lamp circuit capable of being charged in light-off state | |
| CN201839269U (en) | Electronic switch | |
| CN205051402U (en) | Lithium batteries control circuit | |
| CN200976502Y (en) | Electric power output steering circuit | |
| CN203086215U (en) | Solar movable power supply | |
| CN201985968U (en) | Control circuit shared by keyboard lamp and charging indicator lamp of mobile phone | |
| CN201315689Y (en) | Solar energy lawn lamp control circuit | |
| CN202005027U (en) | Control circuit of charging indicating light | |
| CN208797559U (en) | A kind of electric power management circuit | |
| CN201134691Y (en) | Movable power source | |
| CN102185941B (en) | Mobile terminal | |
| CN207491245U (en) | A kind of sport footwear LED controls chip circuit | |
| CN110071551B (en) | Overcharge protection circuit for mobile phone | |
| CN104242361A (en) | Charging state indicating circuit | |
| CN204634096U (en) | Novel firefighting extra exit emergency light circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20131223 |