CN102933002B - A kind of drive circuit, system and method for Mobile terminal keyboard lamp - Google Patents
A kind of drive circuit, system and method for Mobile terminal keyboard lamp Download PDFInfo
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- CN102933002B CN102933002B CN201210468194.9A CN201210468194A CN102933002B CN 102933002 B CN102933002 B CN 102933002B CN 201210468194 A CN201210468194 A CN 201210468194A CN 102933002 B CN102933002 B CN 102933002B
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Abstract
The invention discloses a kind of drive circuit, system and method for Mobile terminal keyboard lamp, in order to solve the different problem of keyboard light brightness.This drive circuit comprises: constant-current supply module and keyboard light; Wherein, described constant-current supply module and described keyboard light form a current circuit.In the present invention, adopt the mode of constant current to drive keyboard light, make the electric current flowing through keyboard light consistent, thus the brightness of keyboard light can not be caused different.
Description
Technical field
The present invention relates to technical field of electronic products, particularly a kind of drive circuit, system and method for Mobile terminal keyboard lamp.
Background technology
At present, the keyboard light on mobile terminal adopts constant voltage mode to drive, and as described in Figure 1, each keyboard light 101 forms a corresponding circuit with a constant voltage source module 103 after connecting with a resistance 102 respectively.And general keyboard light is LED, there is individual difference in LED, like this, the electric current flowing through each LED is not necessarily identical, and the brightness of LED is relevant to the electric current flowing through LED, thus the brightness that result in LED is different.Further, can not be identical with the resistance that LED strip joins, also can increase the electric current different probability flowing through each LED, the brightness of LED also may be caused different.
Visible, existing keyboard light constant voltage type of drive, can cause the brightness of keyboard light different, have impact on the use of mobile terminal.
Summary of the invention
The invention provides a kind of drive circuit, system and method for Mobile terminal keyboard lamp, in order to solve the different problem of keyboard light brightness.
The invention provides a kind of drive circuit of Mobile terminal keyboard lamp, comprising: constant-current supply module 202 and keyboard light 201; Wherein,
Described constant-current supply module 202 forms a current circuit with described keyboard light 201.
In visible the present invention, adopt the mode of constant current to drive keyboard light, make the electric current flowing through keyboard light consistent, thus the brightness of keyboard light can not be caused different.
Drive circuit in the present invention also comprises: backlight 203, and described backlight 203 forms a current circuit with described constant-current supply module 202 after connecting with described keyboard light 201.
Like this, backlight and keyboard light can adopt same constant-current supply module to power, and save the constant-current supply module of power supply.
Above-mentioned constant-current supply module 202 is backlight driving power.
Like this, do not need in mobile terminal additionally to increase a constant-current supply module, adopt backlight driving power just passable, save resource.
Certainly, keyboard light is LED.Like this, keyboard light does not need special material, and the LED generally used is just passable, saves resource further.
The invention provides a kind of drive system of Mobile terminal keyboard lamp, comprising: processor 100, switching circuit 200, and above-mentioned drive circuit 300; Wherein,
Described in described processor 100, switching circuit 200 connects, for issuing switch directive command to described switching circuit 200;
Described switching circuit 200 points is connected with described processor 100 and described drive circuit 200, for under the control of described switch directive command, constant-current supply module in drive circuit 300 described in switch, makes the keyboard light in described drive circuit 300 light or extinguish.
Visible, processor controls the constant-current supply module in drive circuit by switching circuit, thus the keyboard light in drive circuit can be caused to light or extinguish.Achieve the automatic control of Mobile terminal keyboard lamp.
The drive system of Mobile terminal keyboard lamp, also comprises:
Request module, is connected with described processor, for sending the request of unlatching or turn-off request to described processor of stating;
Then described processor 100, specifically for when receiving described unlatching request, sending to described switching circuit 200 and opening directive command, when receiving described turn-off request, sending close directive command to described shut-off circuit 200;
Described switching circuit 200, specifically for when receiving described unlatching directive command, open the constant-current supply module in described drive circuit 300, make the keyboard light in described drive circuit 300 bright, when receiving described closedown directive command, close the constant-current supply module in described drive circuit 300, the keyboard light in described drive circuit 300 is extinguished.
Preferably, described request module is open detection module, for when detecting that described mobile terminal is opened, sending described unlatching request, when detecting that described mobile terminal is closed, sending described turn-off request to described processor 100 to described processor 100.
Preferably, described request module is light detection module, be connected with described processor, for detecting the brightness value of described mobile terminal setting range, when institute's brightness value is less than first threshold, send described unlatching request to described processor 100, when institute's brightness value is greater than Second Threshold, send described turn-off request to described processor 100.
Visible, when mobile terminal is opened or close, processor can light or extinguish by autokeyer dish lamp.In addition, but this mobile terminal also oneself dynamic shading value detecting residing environment, carry out supervisory keyboard lamp according to the shading value detected and light or extinguish.Further, what keyboard light adopted is that the mode of constant current drives, and makes the electric current flowing through keyboard light consistent, thus the brightness of keyboard light can not be caused different.
The invention provides the driving method of Mobile terminal keyboard lamp, be applied in above-mentioned drive system, comprise:
Obtain unlatching request or the turn-off request of keyboard light;
Issue to switching circuit and ask or switch directive command that turn-off request is corresponding with described unlatching, make described switching circuit under the control at described switch directive command, constant-current supply module in switch driving circuit, makes the keyboard light in described drive circuit light or extinguish.
Preferably, unlatching request or the turn-off request of described acquisition keyboard light comprise: the unlatching request or the turn-off request that receive keyboard light from open detection module, wherein, described open detection module is when detecting that described mobile terminal is opened, send described unlatching request, when detecting that described mobile terminal is closed, send described turn-off request.
Preferably, unlatching request or the turn-off request of described acquisition keyboard light comprise: the unlatching request or the turn-off request that receive keyboard light from light detection module, wherein, described light detection module, detect the brightness value of described mobile terminal setting range, send described unlatching request when institute's brightness value is less than first threshold, send described turn-off request when brightness value is greater than Second Threshold.
Therefore, by switching circuit, the constant-current supply module in drive circuit is controlled, thus the keyboard light in drive circuit can be caused to light or extinguish.Achieve the automatic control of Mobile terminal keyboard lamp.And can open according to mobile terminal or close supervisory keyboard lamp and light or extinguish, or carry out supervisory keyboard lamp according to the shading value detected and light or extinguish.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structure chart of the drive circuit of keyboard light in prior art;
Fig. 2 is the structure chart of the drive circuit of a kind of keyboard light of the embodiment of the present invention;
Fig. 3 is the structure chart of the drive circuit of the embodiment of the present invention two kinds of keyboard light;
Fig. 4 is the Organization Chart of the drive system of the embodiment of the present invention three kinds of keyboard light;
Fig. 5 is the flow chart of the driving of the embodiment of the present invention four kinds of keyboard light.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
In the embodiment of the present invention, the keyboard light in mobile terminal adopts the mode of constant current to drive, and like this, makes the electric current flowing through keyboard light consistent, thus the brightness of keyboard light can not be caused different.
Embodiment one, see Fig. 2, in the embodiment of the present invention, the drive circuit of Mobile terminal keyboard lamp comprises:
Constant-current supply module 202 and keyboard fixed 201, wherein, constant-current supply module 202 and keyboard light 201 form a current circuit.
Show the current circuit that three route constant-current supply modules and keyboard light form in Fig. 2, each constant-current supply module 202 and keyboard light 201 directly head and the tail connect to form a current circuit.Like this, if each constant-current supply module 202 export electric current time consistent, the electric current flowing through each keyboard light will be consistent, thus greatly reduce the probability causing the brightness of keyboard light different.
Embodiment two, see Fig. 3, in the embodiment of the present invention, the drive circuit of Mobile terminal keyboard lamp not only comprises: constant-current supply module 202 and keyboard fixed 201, but also comprises: backlight 203.Here, equally for three current circuits, in each current circuit, backlight 203 directly joins end to end with constant-current supply module 202 after connecting with keyboard light 201, forms a current circuit.
In this drive circuit, what still adopt is that the mode of constant current drives keyboard light, equally, as long as each constant-current supply module 202 export electric current time consistent, the electric current flowing through each keyboard light will be consistent, thus greatly reduce the probability causing the brightness of keyboard light different.
Due in existing mobile terminal, general backlight is all adopt the mode of constant current to drive, namely in mobile terminal, already present backlight driving power is constant-current supply, so, in above-mentioned two embodiments, constant-current supply module 202 can directly adopt backlight driving power, as shown in Figure 3, includes constant-current supply module 202 in backlight driving chip.Like this, do not need to configure independent constant-current supply again, save resource.Further, above-mentioned keyboard light can adopt this light-emitting component generally used of LED, also can not increase the production cost of mobile terminal.
For the mobile terminal of drive circuit that have employed above-mentioned keyboard light, processor can the lighting or extinguish of autokeyer dish lamp.
Embodiment three, see Fig. 4, in the embodiment of the present invention, the drive system of Mobile terminal keyboard lamp comprises: processor 100, switching circuit 200 and drive circuit 300, and wherein, drive circuit 300 can be the circuit shown in embodiment one or embodiment two.
Processor 100 is connected with switching circuit 200, for issuing switch directive command to switching circuit 100.
Switching circuit 200 is connected with processor 100 and drive circuit 300 respectively, and under the control of the switch directive command received, the constant-current supply module in switch driving circuit 300, makes the keyboard light in drive circuit 300 light or extinguish.
When also comprising backlight in this drive circuit 300, then also while supervisory keyboard lamp lights or extinguishes, backlight can be controlled and lights or extinguish.
Particularly, this drive system also comprises: request module, and this request module is connected with processor 100, for sending the request of unlatching or turn-off request to processor 100.
Then processor 100, specifically for when receiving unlatching request, sending to switching circuit and opening directive command, when receiving turn-off request, sends closedown directive command to switching circuit.
Switching circuit 200, specifically for when receiving unlatching directive command, opens the constant-current supply module in drive circuit 300, and like this, constant-current supply module exports setting electric current, and the keyboard light in drive circuit 300 is lighted; When receiving closedown directive command, close the constant-current supply module in drive circuit 300, like this, constant-current supply end-of-module output current, makes the keyboard light in drive circuit 300 extinguish.
When also comprising backlight in drive circuit 300, when constant-current supply module exports setting electric current, the keyboard light in dynamic circuit 300 and backlight can be made simultaneously to light, at constant-current supply end-of-module output current, the keyboard light in dynamic circuit 300 and backlight can be made to extinguish simultaneously.
In the present embodiment, request module can be open detection module, for when detecting that mobile terminal is opened, sending the request of unlatching, when detecting that mobile terminal is closed, sending turn-off request to processor 100 to processor 100.
Namely during mobile terminal-opening, request module sends to processor 100 request of unlatching, like this, processor 100 sends to switching circuit 200 and opens directive command, thus, the constant-current supply module in drive circuit 300 opened by switching circuit 200 according to this unlatching directive command, make keyboard light or, keyboard light and backlight light.
During mobile terminal shutdown, request module sends turn-off request to processor 100, like this, processor 100 sends to switching circuit 200 and cuts out directive command, thus, switching circuit 200 cuts out the constant-current supply module in drive circuit 300 according to this cut out directive command, make keyboard light or, keyboard light and backlight extinguish.
In the present embodiment, request module also can be light detection module, light detection module is connected with processor 100, for detecting the brightness value of mobile terminal setting range, when institute's brightness value is less than first threshold, send to processor 100 request of unlatching, when institute's brightness value is greater than Second Threshold, send turn-off request to processor 100.General first threshold is less than or equal to Second Threshold.
Particularly, the dim of mobile terminal setting range, namely when the brightness value of setting range that light detection module detects is less than first threshold, the request of unlatching is sent to processor 100, like this, processor 100 sends to switching circuit 200 and opens directive command, thus, the constant-current supply module in drive circuit 300 opened by switching circuit 200 according to this unlatching directive command, make keyboard light or, keyboard light and backlight light.The light of mobile terminal setting range has brightened, namely when the brightness value of setting range that light detection module detects is greater than Second Threshold, turn-off request is sent to processor 100, like this, processor 100 sends to switching circuit 200 and cuts out directive command, thus switching circuit 200 cuts out the constant-current supply module in drive circuit 300 according to this cut out directive command, make keyboard light or, keyboard light and backlight extinguish.
Visible, by the drive system of above-mentioned keyboard light, can the lighting or extinguish of autokeyer dish lamp, and, being can also simultaneously the lighting or extinguish of supervisory keyboard lamp and backlight when also comprising backlight in drive circuit, not needing to increase a set of drive system more in addition, saving resource.
Embodiment four, in the drive system of above-mentioned keyboard light, drives the detailed process of keyboard light see Fig. 5, comprising:
Step 501: the unlatching request or the turn-off request that receive keyboard light.
Particularly, can receive unlatching request or the turn-off request of keyboard light from open detection module, wherein, open detection module, when detecting that mobile terminal is opened, sends the request of unlatching, when detecting that mobile terminal is closed, sends turn-off request.
Or, receive unlatching request or the turn-off request of keyboard light from light detection module, wherein, light detection module, detect the brightness value of mobile terminal setting range, send when institute's brightness value is less than first threshold the request of unlatching, send turn-off request when brightness value is greater than Second Threshold.
Step 502: issue to switching circuit and ask or switch directive command that turn-off request is corresponding with opening, make switching circuit under the control at switch directive command, constant-current supply module in switch driving circuit, makes the keyboard light in drive circuit light or extinguish.
Like this, to switching circuit send open directive command time, the constant-current supply module in drive circuit opened by switching circuit according to this unlatching directive command, make keyboard light or, keyboard light and backlight light.Or, to switching circuit send close directive command time, switching circuit cuts out the constant-current supply module in drive circuit according to this cut out directive command, make keyboard light or, keyboard light and backlight extinguish.
Visible, can the lighting or extinguish of autokeyer dish lamp separately, also can the lighting or extinguish of supervisory keyboard lamp and backlight simultaneously, achieve the Synchronization Control of keyboard light and backlight, decrease the flow process of control.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a drive circuit for Mobile terminal keyboard lamp, is characterized in that, comprising: constant-current supply module and keyboard light; Wherein, each described constant-current supply module and a described keyboard light form a current circuit, and the electric current that each described constant-current supply module provides is consistent;
Described drive circuit also comprises backlight,
Described backlight forms a current circuit with described constant-current supply module after connecting with described keyboard light.
2. drive circuit as claimed in claim 1, it is characterized in that, described constant-current supply module is backlight driving power.
3. drive circuit as claimed in claim 1, it is characterized in that, described keyboard light is LED.
4. a drive system for Mobile terminal keyboard lamp, is characterized in that, comprising: processor, switching circuit and the drive circuit as described in claim arbitrary in claim 1-3; Wherein,
Described processor is connected with described switching circuit, for issuing switch directive command to described switching circuit;
Described switching circuit is connected with described processor and described drive circuit respectively, and under the control of described switch directive command, the constant-current supply module in drive circuit described in switch, makes the keyboard light in described drive circuit light or extinguish.
5. system as claimed in claim 4, is characterized in that, also comprise: request module, be connected with described processor, for sending the request of unlatching or turn-off request to described processor;
Then described processor, specifically for when receiving described unlatching request, sending to described switching circuit and opening directive command, when receiving described turn-off request, sending close directive command to described switching circuit;
Described switching circuit, specifically for when receiving described unlatching directive command, open the constant-current supply module in described drive circuit, keyboard light in described drive circuit is lighted, when receiving described closedown directive command, close the constant-current supply module in described drive circuit, the keyboard light in described drive circuit is extinguished.
6. system as claimed in claim 5, it is characterized in that, described request module is open detection module, for when detecting that described mobile terminal is opened, sending described unlatching request to described processor, when detecting that described mobile terminal is closed, sending described turn-off request to described processor.
7. system as claimed in claim 5, it is characterized in that, described request module is light detection module, be connected with described processor, for detecting the brightness value of described mobile terminal setting range, when institute's brightness value is less than first threshold, send described unlatching request to described processor, when institute's brightness value is greater than Second Threshold, send described turn-off request to described processor.
8. a driving method for Mobile terminal keyboard lamp, is characterized in that, is applied in the drive system as described in claim arbitrary in claim 4-7, comprises:
Obtain unlatching request or the turn-off request of keyboard light;
Issue to switching circuit and ask or switch directive command that turn-off request is corresponding with described unlatching, make described switching circuit under the control at described switch directive command, constant-current supply module in switch driving circuit, makes the keyboard light in described drive circuit light or extinguish.
9. method as claimed in claim 8, it is characterized in that, unlatching request or the turn-off request of described acquisition keyboard light comprise:
Receive unlatching request or the turn-off request of keyboard light from open detection module, wherein, described open detection module, when detecting that described mobile terminal is opened, sending described unlatching request, when detecting that described mobile terminal is closed, sending described turn-off request.
10. method as claimed in claim 8, it is characterized in that, unlatching request or the turn-off request of described acquisition keyboard light comprise:
Unlatching request or the turn-off request of keyboard light is received from light detection module, wherein, described light detection module, detect the brightness value of described mobile terminal setting range, send described unlatching request when institute's brightness value is less than first threshold, send described turn-off request when brightness value is greater than Second Threshold.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210468194.9A CN102933002B (en) | 2012-11-19 | 2012-11-19 | A kind of drive circuit, system and method for Mobile terminal keyboard lamp |
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| CN201210468194.9A CN102933002B (en) | 2012-11-19 | 2012-11-19 | A kind of drive circuit, system and method for Mobile terminal keyboard lamp |
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| CN102933002A CN102933002A (en) | 2013-02-13 |
| CN102933002B true CN102933002B (en) | 2016-03-23 |
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| CN112287630A (en) * | 2019-07-09 | 2021-01-29 | 苏州市悠越电子有限公司 | Method for improving resistance value of inner loop of keyboard and optimizing layout of printed circuit |
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| CN101179789A (en) * | 2007-09-12 | 2008-05-14 | 青岛海信移动通信技术股份有限公司 | Backlight brightness self-adjusting mobile phone and implementing method thereof |
| CN201180964Y (en) * | 2008-03-12 | 2009-01-14 | 卢灿光 | Color-adjustable press key backlight device |
| CN102222461A (en) * | 2010-07-30 | 2011-10-19 | 惠州Tcl移动通信有限公司 | LED drive circuit of mobile terminal |
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| JP5152507B2 (en) * | 2008-07-31 | 2013-02-27 | 東芝ライテック株式会社 | Lighting system |
| CN101494935A (en) * | 2008-12-10 | 2009-07-29 | 上海闻泰电子科技有限公司 | Method for implementing low power consumption movable communication terminal illumination function |
| CN202931640U (en) * | 2012-11-19 | 2013-05-08 | 北京小米科技有限责任公司 | Drive circuit and drive system for keyboard lamp of mobile terminal |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179789A (en) * | 2007-09-12 | 2008-05-14 | 青岛海信移动通信技术股份有限公司 | Backlight brightness self-adjusting mobile phone and implementing method thereof |
| CN201180964Y (en) * | 2008-03-12 | 2009-01-14 | 卢灿光 | Color-adjustable press key backlight device |
| CN102222461A (en) * | 2010-07-30 | 2011-10-19 | 惠州Tcl移动通信有限公司 | LED drive circuit of mobile terminal |
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