CN102933002A - Driving circuit, system and method with mobile terminal keyboard lamps - Google Patents
Driving circuit, system and method with mobile terminal keyboard lamps Download PDFInfo
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- CN102933002A CN102933002A CN2012104681949A CN201210468194A CN102933002A CN 102933002 A CN102933002 A CN 102933002A CN 2012104681949 A CN2012104681949 A CN 2012104681949A CN 201210468194 A CN201210468194 A CN 201210468194A CN 102933002 A CN102933002 A CN 102933002A
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Abstract
The invention discloses a driving circuit, a driving system and a driving method with mobile terminal keyboard lamps, which are used for solving the problem of different brightnesses of the keyboard lamps. The driving circuit comprises a constant-current power supply module and the keyboard lamps, wherein a current loop is formed by the constant-current power supply module and the keyboard lamps. In the invention, a constant current mode is adopted to drive the keyboard lamps, and thus, currents flowing through the keyboard lamps are constant so as not to cause different brightnesses of the keyboard lamps.
Description
Technical field
The present invention relates to technical field of electronic products, particularly a kind of drive circuit of Mobile terminal keyboard lamp, system and method.
Background technology
At present, the keyboard light on the portable terminal adopts the 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 respectively with after 102 series connection of a resistance.And general keyboard light is LED, and there is individual difference in LED, and like this, the electric current of each LED that flows through is not necessarily identical, and the brightness of LED is relevant with the electric current of the LED that flows through, thereby has caused the brightness of LED different.And the resistance of connecting with LED can not be identical, also can increase the electric current different probability of each LED that flows through, also may cause the brightness of LED different.
As seen, existing keyboard light constant voltage type of drive can cause the brightness of keyboard light different, has affected the use of portable 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.
As seen among the present invention, adopt the mode of constant current to drive keyboard light, so that the electric current of the keyboard light of flowing through is consistent, thereby can not cause the brightness of keyboard light different.
Drive circuit among the present invention also comprises: form a current circuit with described constant-current supply module 202 after backlight 203, described backlight 203 are connected with described keyboard light 201.
Like this, backlight and keyboard light can adopt same constant-current supply module to power, and have saved the constant-current supply module of power supply.
Above-mentioned constant-current supply module 202 is the backlight driving power.
Like this, not needing in the portable terminal additionally increases a constant-current supply module, adopts the backlight driving power of usefulness just passable, has saved resource.
Certainly, keyboard light is the LED lamp.Like this, keyboard light does not need special material, and the LED that generally uses is just passable, has further saved resource.
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 processor 100 described switching circuits 200 connect, and are used for issuing the switch directive command to described switching circuit 200;
Described switching circuit 200 minutes and described processor 100 be connected drive circuit 200 and be connected, be used under the control of described switch directive command, constant-current supply module in the described drive circuit 300 of switch is so that the keyboard light in the described drive circuit 300 lights or extinguishes.
As seen, processor can be controlled the constant-current supply module in the drive circuit by switching circuit, thereby can cause keyboard light in the drive circuit to light or extinguish.Realized 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, is used for sending the request of unlatching or turn-off request to the described processor of stating;
Then described processor 100, to described switching circuit 200 transmission unlatching directive commands, when receiving described turn-off request, cuts out directive command to described shut-off circuit 200 transmissions at concrete being used for when receiving described unlatching request;
Described switching circuit 200, concrete being used for when receiving described unlatching directive command, open the constant-current supply module in the described drive circuit 300, so that the keyboard light in the described drive circuit 300 is bright, described when closing directive command when receiving, close the constant-current supply module in the described drive circuit 300, so that the keyboard light in the described drive circuit 300 is extinguished.
Preferably, the described request module is the open detection module, is used for sending described unlatching request to described processor 100 when detecting described portable terminal and open, when detecting described portable terminal and close, to the described turn-off request of described processor 100 transmissions.
Preferably, the described request module is the light detection module, be connected with described processor, brightness value for detection of described portable terminal setting range, when institute's brightness value during less than first threshold, send described unlatching request to described processor 100, when institute's brightness value during greater than Second Threshold, send described turn-off request to described processor 100.
As seen, when portable terminal is opened or closed, but processor autokeyer dish lamp lights or extinguishes.In addition, this portable terminal also can oneself moving shading value that detects environment of living in, comes the supervisory keyboard lamp to light or extinguishes according to the shading value that detects.And keyboard light adopts is that the mode of constant current drives, so that the electric current of the keyboard light of flowing through is consistent, thereby can not cause the brightness of keyboard light different.
The invention provides the driving method of Mobile terminal keyboard lamp, be applied to comprise in the above-mentioned drive system:
Obtain unlatching request or the turn-off request of keyboard light;
Issue the switch directive command corresponding with described unlatching request or turn-off request to switching circuit, so that described switching circuit is under the control of described switch directive command, constant-current supply module in the switch driving circuit is so that the keyboard light in the described drive circuit lights or extinguishes.
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 the open detection module, wherein, described open detection module is when detecting described portable terminal unlatching, send described unlatching request, when detecting described portable terminal and close, 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 the light detection module, wherein, described light detection module, detect the brightness value of described portable terminal setting range, when institute's brightness value sends described unlatching request during less than first threshold, when brightness value sends described turn-off request during greater than Second Threshold.
Therefore, can control the constant-current supply module in the drive circuit by switching circuit, thereby can cause keyboard light in the drive circuit to light or extinguish.Realized the automatic control of Mobile terminal keyboard lamp.And can open or close the supervisory keyboard lamp to light or extinguish according to portable terminal, or come the supervisory keyboard lamp to light or extinguish according to the shading value that detects.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of writing, claims and accompanying drawing.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Accompanying drawing is used to provide a further understanding of the present invention, and consists of the part of specification, is used for together with embodiments of the present invention 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 the prior art;
Fig. 2 is the structure chart of the drive circuit of a kind of keyboard light of the embodiment of the invention;
Fig. 3 is the structure chart of the drive circuit of two kinds of keyboard light of the embodiment of the invention;
Fig. 4 is the Organization Chart of the drive system of three kinds of keyboard light of the embodiment of the invention;
Fig. 5 is the flow chart of the driving of four kinds of keyboard light of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.
In the embodiment of the invention, the keyboard light in the portable terminal adopts the mode of constant current to drive, and like this, so that the electric current of the keyboard light of flowing through is consistent, thereby can not cause the brightness of keyboard light different.
Embodiment one, and referring to Fig. 2, the drive circuit of Mobile terminal keyboard lamp comprises in the embodiment of the invention:
Constant-current supply module 202 and keyboard decide 201, and wherein, constant-current supply module 202 forms a current circuit with keyboard light 201.
Shown the current circuit that three route constant-current supply modules and keyboard light form among Fig. 2, each constant-current supply module 202 and a keyboard light 201 directly connect to form from beginning to end a current circuit.Like this, as long as consistent during the electric current of each constant-current supply module 202 outputs, the electric current of each keyboard light of flowing through will be consistent, thereby greatly reduced the different probability of brightness that causes keyboard light.
Embodiment two, and referring to Fig. 3, in the embodiment of the invention, the drive circuit of Mobile terminal keyboard lamp not only comprises: constant-current supply module 202 and keyboard decide 201, but also comprise: backlight 203.Here, equally take three current circuits as example, in each bar current circuit, backlight 203 is connected rear with keyboard light 201 and constant-current supply module 202 directly joins end to end, and forms a current circuit.
In this drive circuit, what still adopt is that the mode of constant current drives keyboard light, same, as long as consistent during the electric current of each constant-current supply module 202 output, the electric current of each keyboard light of flowing through will be consistent, thereby greatly reduced the different probability of brightness that causes keyboard light.
Because in the existing portable terminal, general backlight all is to adopt the mode of constant current to drive, be that already present backlight driving power is constant-current supply in the portable terminal, so, among above-mentioned two embodiment, constant-current supply module 202 can directly adopt the backlight driving power, as shown in Figure 3, has comprised constant-current supply module 202 in the backlight driving chip.Like this, do not need to dispose again independent constant-current supply, saved resource.And above-mentioned keyboard light can adopt this light-emitting component that generally uses of LED, also can not increase the production cost of portable terminal.
For the portable terminal of the drive circuit that has adopted above-mentioned keyboard light, processor can autokeyer dish lamp lights or extinguishes.
Embodiment three, and referring to Fig. 4, in the embodiment of the invention, the drive system of Mobile terminal keyboard lamp comprises: processor 100, switching circuit 200 and drive circuit 300, wherein, drive circuit 300 can be the circuit shown in embodiment one or the embodiment two.
When also comprising backlight in this drive circuit 300, then also can be when the supervisory keyboard lamp light or extinguish, the control backlight lights or extinguishes.
Particularly, this drive system also comprises: request module, this request module is connected with processor 100, is used for sending the request of unlatching or turn-off request to processor 100.
Then processor 100, and is concrete for when receiving the unlatching request, sends to switching circuit and opens directive command, when receiving turn-off request, closes directive command to the switching circuit transmission.
Switching circuit 200, concrete being used for opened the constant-current supply module in the drive circuit 300 when receiving the unlatching directive command, and like this, electric current is set in the output of constant-current supply module, so that the keyboard light in the drive circuit 300 lights; When receiving when closing directive command, close the constant-current supply module in the drive circuit 300, like this, the constant-current supply module stops output current, so that the keyboard light in the drive circuit 300 is extinguished.
When also comprising backlight in the drive circuit 300, when electric current is set in the output of constant-current supply module, can stop output current in the constant-current supply module simultaneously so that keyboard light and backlight in the moving circuit 300 light, can be simultaneously so that keyboard light and backlight in the moving circuit 300 extinguish.
In the present embodiment, request module can be the open detection module, is used for sending the request of unlatching to processor 100 when detecting portable terminal and open, when detecting portable terminal and close, to processor 100 transmission turn-off request.
When being mobile terminal-opening, request module sends the request of unlatching to processor 100, like this, processor 100 sends to switching circuit 200 and opens directive command, thereby, switching circuit 200 is opened directive command according to this and is opened constant-current supply module in drive circuit 300 so that keyboard light or, keyboard light and backlight light.
During the portable 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, thereby, switching circuit 200 cuts out directive command according to this and cuts out constant-current supply module in the drive circuit 300 so that keyboard light or, keyboard light and backlight extinguish.
In the present embodiment, request module also can be the light detection module, the light detection module is connected with processor 100, brightness value for detection of the portable terminal setting range, when institute's brightness value during less than first threshold, send the request of unlatching to processor 100, when institute's brightness value during greater than Second Threshold, send turn-off request to processor 100.General first threshold is less than or equal to Second Threshold.
Particularly, the light of portable terminal setting range is dimmed, be that the brightness value of the setting range that detects of light detection module is during less than first threshold, send the request of unlatching to processor 100, like this, processor 100 sends to switching circuit 200 and opens directive command, thereby, switching circuit 200 is opened directive command according to this and is opened constant-current supply module in drive circuit 300 so that keyboard light or, keyboard light and backlight light.The light of portable terminal setting range has brightened, be that the brightness value of the setting range that detects of light detection module is during greater than Second Threshold, send turn-off request to processor 100, like this, processor 100 sends to switching circuit 200 and cuts out directive command, thereby switching circuit 200 cuts out directive command according to this and cuts out constant-current supply module in the drive circuit 300 so that keyboard light or, keyboard light and backlight extinguish.
As seen, by the drive system of above-mentioned keyboard light, can autokeyer dish lamp light or extinguish, and, comprise also that in drive circuit backlight is the lighting or extinguish of supervisory keyboard lamp and backlight simultaneously, do not need to increase again in addition a cover drive system, saved resource.
Embodiment four, in the drive system of above-mentioned keyboard light, drive the detailed process of keyboard light referring to Fig. 5, comprising:
Step 501: the unlatching request or the turn-off request that receive keyboard light.
Particularly, can receive from the open detection module unlatching request or the turn-off request of keyboard light, wherein, the open detection module sends the request of unlatching when detecting portable terminal and open, when detecting portable terminal and close, and the transmission turn-off request.
Perhaps, from unlatching request or the turn-off request of light detection module reception keyboard light, wherein, the light detection module, detect the brightness value of portable terminal setting range, when institute's brightness value sends the request of unlatching during less than first threshold, when brightness value sends turn-off request during greater than Second Threshold.
Step 502: issue the switch directive command corresponding with the request of opening or turn-off request to switching circuit, so that switching circuit is under the control of switch directive command, constant-current supply module in the switch driving circuit is so that the keyboard light in the drive circuit lights or extinguishes.
Like this, when send opening directive command to switching circuit, switching circuit is opened directive command according to this and is opened constant-current supply module in drive circuit so that keyboard light or, keyboard light and backlight light.Perhaps, send when closing directive command to switching circuit, switching circuit cuts out directive command according to this and cuts out constant-current supply module in the drive circuit so that keyboard light or, keyboard light and backlight extinguish.
As seen, independent the lighting or extinguish of autokeyer dish lamp, also supervisory keyboard lamp and backlight light or extinguish has simultaneously been realized the Synchronization Control of keyboard light and backlight, has reduced the flow process of control.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, complete implement software example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form of the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device producing a machine, so that the instruction of carrying out by the processor of computer or other programmable data processing device produces the device of the function that is used for being implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, so that the instruction that is stored in this computer-readable memory produces the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, so that carry out the sequence of operations step producing computer implemented processing at computer or other programmable devices, thereby be provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction that computer or other programmable devices are carried out.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (11)
1. the drive circuit of a Mobile terminal keyboard lamp is characterized in that, comprising: constant-current supply module and keyboard light; Wherein,
Described constant-current supply module and described keyboard light form a current circuit.
2. drive circuit as claimed in claim 1 is characterized in that, also comprises: form a current circuit with described constant-current supply module after backlight, described backlight are connected with described keyboard light.
3. drive circuit as claimed in claim 1 or 2 is characterized in that, described constant-current supply module is the backlight driving power.
4. drive circuit as claimed in claim 1 or 2 is characterized in that, described keyboard light is the LED lamp.
5. the drive system of a Mobile terminal keyboard lamp is characterized in that, comprising: processor, switching circuit and such as the described drive circuit of arbitrary claim among the claim 1-4; Wherein,
Described processor is connected with described switching circuit, is used for issuing the switch directive command to described switching circuit;
Described switching circuit respectively with described processor be connected drive circuit and be connected, be used under the control of described switch directive command, the constant-current supply module in the described drive circuit of switch is so that the keyboard light in the described drive circuit lights or extinguishes.
6. system as claimed in claim 5 is characterized in that, also comprises: request module, be connected with described processor, and be used for sending the request of unlatching or turn-off request to described processor;
Then described processor, to described switching circuit transmission unlatching directive command, when receiving described turn-off request, cuts out directive command to described switching circuit transmission at concrete being used for when receiving described unlatching request;
Described switching circuit, concrete being used for when receiving described unlatching directive command, open the constant-current supply module in the described drive circuit, so that the keyboard light in the described drive circuit lights, described when closing directive command when receiving, close the constant-current supply module in the described drive circuit, so that the keyboard light in the described drive circuit is extinguished.
7. system as claimed in claim 6 is characterized in that, the described request module is the open detection module, be used for when detecting described portable terminal unlatching, send described unlatching request to described processor, when detecting described portable terminal and close, send described turn-off request to described processor.
8. system as claimed in claim 6, it is characterized in that, the described request module is the light detection module, be connected with described processor, for detection of the brightness value of described portable terminal setting range, when institute's brightness value during less than first threshold, send described unlatching request to described processor, when institute's brightness value during greater than Second Threshold, send described turn-off request to described processor.
9. the driving method of a Mobile terminal keyboard lamp is characterized in that, is applied to comprise as in the described drive system of arbitrary claim among the claim 5-8:
Obtain unlatching request or the turn-off request of keyboard light;
Issue the switch directive command corresponding with described unlatching request or turn-off request to switching circuit, so that described switching circuit is under the control of described switch directive command, constant-current supply module in the switch driving circuit is so that the keyboard light in the described drive circuit lights or extinguishes.
10. method as claimed in claim 9 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 the open detection module, wherein, described open detection module sends described unlatching request when detecting described portable terminal unlatching, when detecting described portable terminal and close, sends described turn-off request.
11. method as claimed in claim 9 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 the light detection module, wherein, described light detection module, detect the brightness value of described portable terminal setting range, when institute's brightness value sends described unlatching request during less than first threshold, when brightness value sends described turn-off request during greater than Second Threshold.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| 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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| CN102933002A true CN102933002A (en) | 2013-02-13 |
| CN102933002B CN102933002B (en) | 2016-03-23 |
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| CN201210468194.9A Active 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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Cited By (1)
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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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