CN109493810A - Back light brightness regulating method, power management chip, mobile terminal and storage medium - Google Patents
Back light brightness regulating method, power management chip, mobile terminal and storage medium Download PDFInfo
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- CN109493810A CN109493810A CN201811557822.4A CN201811557822A CN109493810A CN 109493810 A CN109493810 A CN 109493810A CN 201811557822 A CN201811557822 A CN 201811557822A CN 109493810 A CN109493810 A CN 109493810A
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- led string
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
Abstract
The embodiment of the invention discloses in a kind of back light brightness regulating method, power management chip, mobile terminal and storage medium, it is related to display backlight control technology field.Wherein method includes: the real-time brightness values for obtaining mobile terminal current environment, the mapping table of preconfigured ambient brightness with switching means conductive/cut-off in every group of LED string is inquired according to brightness values, obtain switch-control strategy corresponding with brightness values, and switch unit of the power management chip respectively into multiple groups LED string is controlled according to switch-control strategy and exports corresponding control signal, make the switch unit in multiple groups LED string according to switch-control strategy on or off, so as to so that mobile terminal is connected according to the LED string that different environmental light brightness automatically selects various combination, realization is under sunburst or when the late into the night uses mobile terminal, backlight is adjusted to suitable brightness, the user experience is improved.
Description
Technical field
The present embodiments relate to LCD backlight control technology field, in particular to a kind of backlight illumination adjusting side
Method, device and computer readable storage medium.
Background technique
Liquid crystal display (Liquid Crystal Display, LCD) type of mobile terminal mainly has on the market at present
Two kinds, one kind is Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) LCD, and another kind is film
Transistor (Thin Film Transistor, TFT) LCD.OLED LCD is self-luminous LCD, does not need additional backlight, and
TFT LCD then needs additional backlight.Currently, mobile terminal generally all has according to environment certainly in TFT LCD display technology
The function of dynamic adjusting backlight luminance, but the backlight illumination regulative mode of existing mobile terminal is to pass through backlight by changing
The size of driving voltage come realize backlight illumination adjust, still have under sunburst use when backlight illumination it is inadequate, or
Brightness too high problem when person uses at dead of night.
Summary of the invention
In view of this, the embodiment of the present invention is designed to provide a kind of back light brightness regulating method, device and computer
Readable storage medium storing program for executing, when solving to use under sunburst existing for existing mobile terminal screen backlight illumination regulative mode
Backlight illumination is inadequate, or brightness too high problem when use at dead of night.
It is as follows that the present invention solves technical solution used by above-mentioned technical problem:
According to an aspect of an embodiment of the present invention, a kind of back light brightness regulating method is provided, mobile terminal, institute are applied to
Stating mobile terminal includes display backlight source and power management chip, and the display backlight source includes the LED string of multiple groups parallel connection,
The LED string includes: multiple LED and switch unit, and one end is connected to the power management core after the multiple LED series connection
The driving voltage output end of piece, the other end are connected to the input terminal of the switch unit, the output end connection of the switch unit
To the power management chip sink current pin, the control terminal of the switch unit be connected on the power management chip with
The LED goes here and there corresponding control signal output；The back light brightness regulating method includes:
The brightness values of the mobile terminal current environment are obtained in real time；
Preconfigured ambient brightness and switching means conductive/cut-off in every group of LED string are inquired according to the brightness values
Mapping table, obtain corresponding with brightness values switch-control strategy；
Switch list of the power management chip respectively into the string of LED described in multiple groups is controlled according to the switch-control strategy
Member exports corresponding control signal, and the switch unit in the string of LED described in multiple groups is made to be connected or cut according to the switch-control strategy
Only.
Based on the above technical solution, described according to the preconfigured ambient brightness of brightness values inquiry and every
Group LED go here and there in switching means conductive/cut-off mapping table, obtain corresponding with brightness values switch-control strategy it
Before further include:
The backlight shaping modes for judging the mobile terminal are general mode or intelligent mode；
When the backlight shaping modes be intelligent mode when, into it is described according to the brightness values inquire it is preconfigured
The mapping table of ambient brightness and switching means conductive/cut-off in every group of LED string, obtains opens corresponding with the brightness values
The step of closing control strategy；
When the backlight shaping modes are general mode, then according to preconfigured back corresponding with the general mode
Light adjusts the brightness in display backlight source described in strategy adjustment.
Based on the above technical solution, when the backlight shaping modes are intelligent mode, LED string described in multiple groups
The forward conduction electric current for defaulting the LED that operating voltage is identical, selects in different LED strings is different.
Based on the above technical solution, the display backlight source includes 4 groups of LED strings in parallel, what 4 groups of LED went here and there
Default operating voltage is 3V, and it is the LED of 4mA that the first LED string, which selects forward conduction electric current, and the 2nd LED string selects forward conduction
Electric current is the LED of 8mA, and it is the LED of 16mA that the 3rd LED string, which selects forward conduction electric current, and the 4th LED string selects forward conduction electric current
For the LED of 32mA.
Based on the above technical solution, preconfigured ambient brightness and every group are inquired according to the brightness values
The mapping table of switching means conductive/cut-off, obtains switch-control strategy packet corresponding with the brightness values in LED string
It includes:
When the brightness values are between 0lm~10lm, switching means conductive in the 4th LED string, other LED
Switch unit in string is turned off；
When the brightness values are between 10lm~20lm, switching means conductive in the 3rd LED string, other
Switch unit in LED string is turned off；
Switch unit when the brightness values are between 20lm~40ml, in the first LED string and the 2nd LED string
It is turned off, the switch unit in the 3rd LED string and the 4th LED string is both turned on；
When the brightness values are between 40lm~80lm, switching means conductive in the 2nd LED string, other
Switch unit in LED string is turned off；
When the brightness values are between 80lm~120lm, opening in the first LED string and the 3rd LED string
It closes unit to be turned off, the switch unit in the 2nd LED string and the 4th LED string is both turned on；
When the brightness values are between 120lm~160ml, opening in the first LED string and the 4th LED string
It closes unit to be turned off, the switch unit in the 2nd LED string and the 3rd LED string is both turned on；
When the brightness values are between 160lm~200lm, the switch unit in the first LED string ends, other
Switch unit in LED string is both turned on；
When the brightness values are between 200lm~250lm, switching means conductive in the first LED string, other
Switch unit in LED string is turned off；
When the brightness values are between 250lm~300lm, opening in the first LED string and the 4th LED string
Close unit conducting, the switch unit cut-off in the 2nd LED string and the 3rd LED string；
When the brightness values are between 300lm~350lm, opening in the first LED string and the 3rd LED string
Close unit conducting, the switch unit cut-off in the 2nd LED string and the 4th LED string；
When the brightness values are between 350lm~400lm, the switch unit in the 2nd LED string ends, other
Switching means conductive in LED string；
When the brightness values are between 400lm~500lm, opening in the first LED string and the 2nd LED string
Close unit conducting, the switch unit cut-off in the 3rd LED string and the 4th LED string；
When the brightness values are between 500lm~550lm, the switch unit in the 3rd LED string ends, other
Switch unit in LED string is both turned on；
When the brightness values are between 550lm~600lm, the switch unit in the 4th LED string ends, other
Switch unit in LED string is both turned on；
When the brightness values are greater than between 600lm, the first LED string, the 2nd LED string, the 3rd LED
Switch unit in string and the 4th LED string is both turned on.
Based on the above technical solution, when the backlight shaping modes are general mode, then basis is pre-configured with
Backlight corresponding with the general mode adjust the brightness in display backlight source described in strategy adjustment and include:
When the backlight shaping modes are general mode, the backlight adjusts strategy to keep in the first LED string
Switch unit cut-off, the switch unit in second LED light string, the third LED light string and the 4th LED light string leads
It is logical, the size of the driving voltage by adjusting the power management chip driving voltage output end output according to the brightness values
Mode adjust the brightness in the display backlight source.
Based on the above technical solution, the switch unit is metal-oxide-semiconductor, and the grid of the metal-oxide-semiconductor is the switch
The control terminal of unit, the drain electrode of the metal-oxide-semiconductor are the input terminal of the switch unit, and the source electrode of the metal-oxide-semiconductor is the switch
The output end of unit.
Other side according to an embodiment of the present invention, provides a kind of power management chip, including memory, processor and
It is stored in the computer program that can be run on the memory and on the processor, the computer program is by the place
When managing device and executing, the step of realizing back light brightness regulating method as described above.
Another aspect according to an embodiment of the present invention provides a kind of storage medium, meter is stored on the storage medium
Calculation machine program when the computer program is executed by processor, is realized such as the step of above-mentioned back light brightness regulating method.
Another aspect according to an embodiment of the present invention, provides a kind of mobile terminal, including display backlight source and above-mentioned
Power management chip, the display backlight source include the LED string of multiple groups parallel connection, and the LED string includes: multiple LED and one
Switch unit, one end is connected to the driving voltage output end of the power management chip after the multiple LED series connection, and the other end connects
It is connected to the input terminal of the switch unit, the output end of the switch unit is connected to the sink current pipe of the power management chip
Foot, the control terminal of the switch unit are connected on the power management chip control signal output corresponding with LED string
End.
In back light brightness regulating method provided in an embodiment of the present invention, power management chip, mobile terminal and storage medium,
Due to every group of LED string one switch unit of setting in backlight, and the mobile terminal is obtained using power management chip in real time
The brightness values of current environment are inquired in preconfigured ambient brightness and every group of LED string according to the brightness values and are opened
The mapping table of unit conduction and cut-off is closed, obtains switch-control strategy corresponding with the brightness values, and open according to described
It closes control strategy and controls the corresponding control letter of switch unit output of the power management chip respectively into the string of LED described in multiple groups
Number, make the switch unit in the string of LED described in multiple groups according to the switch-control strategy on or off, so as to so that mobile whole
End is connected according to the LED string that different environmental light brightness automatically selects various combination, so as to realize in sunburst
When the lower or late into the night uses mobile terminal, backlight is adjusted to suitable brightness, user experience is promoted.
Detailed description of the invention
It in order to more clearly explain the technical solutions in the embodiments of the present application, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only some of the application
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the hardware structural diagram for the mobile terminal that the embodiment of the present invention one provides；
Fig. 2 is the implementation process schematic diagram of back light brightness regulating method provided by Embodiment 2 of the present invention；
Fig. 3 is the circuit theory schematic diagram that the present invention one implements display backlight source brightness regulation in example；
Fig. 4 is the implementation process schematic diagram for the back light brightness regulating method that the embodiment of the present invention three provides；
Fig. 5 is the hardware structural diagram for the power management chip that the embodiment of the present invention four provides.
Specific embodiment
In order to be clearer and more clear technical problems, technical solutions and advantages to be solved, tie below
Drawings and examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
Embodiment one
Fig. 1 is the hardware structural diagram for the mobile terminal that the embodiment of the present invention one provides.Only show for ease of description
Part related to the present embodiment is gone out.
Shown in Figure 1, mobile terminal provided in this embodiment includes display backlight source 2 and 1, power management core, institute
It states the LED that display backlight source 2 includes multiple groups parallel connection to go here and there, the LED string includes: multiple LED and switch unit, described more
One end is connected to the driving voltage output end WLED_VREG of 1, the power management core after a LED series connection, and the other end is connected to
The input terminal of the switch unit, the output end of the switch unit are connected to the sink current pin of 1, the power management core
WLED_SINK, the control terminal of the switch unit are connected to 1 on piece of power management core control corresponding with LED string
Signal output end GPIO (n).
Preferably, the switch unit is metal-oxide-semiconductor, and the grid of the metal-oxide-semiconductor is the control terminal of the switch unit, described
The drain electrode of metal-oxide-semiconductor is the input terminal of the switch unit, and the source electrode of the metal-oxide-semiconductor is the output end of the switch unit.It is multiple
The grid of metal-oxide-semiconductor is respectively connected to the different control signal output of 1 on piece of power management core, the source electrode of multiple metal-oxide-semiconductors
The sink current pin of 1, the power management core is connected to after connecting together.1, the power management core can be each by controlling
The LED string of switch unit selection various combination on LED string carries out backlight display.
Embodiment two
Fig. 2 is the implementation process schematic diagram of back light brightness regulating method provided by Embodiment 2 of the present invention, and this method is held
Row main body is 1, power management core in mobile terminal shown in Fig. 1.It is shown in Figure 2, backlight illumination tune provided in this embodiment
Section method may comprise steps of:
Step S201 obtains the brightness values of the mobile terminal current environment in real time.
Preferably, in the present embodiment, the mobile terminal further includes the light sensing for detecting the brightness values of environment
Device, the optical sensor are connect with 1, power management core optical signal input pin, and 1, the power management core passes through
The detected value for reading the optical sensor obtains the brightness value of the mobile terminal current environment.
Step S202 inquires preconfigured ambient brightness and switch unit in every group of LED string according to the brightness values
The mapping table of conduction and cut-off obtains switch-control strategy corresponding with the brightness values.
Preferably, in the present embodiment, the forward conduction electric current of the LED selected in different LED strings is different.It can make in this way
1, power management core is obtained to be shown according to the LED string combination progress backlight that mobile terminal local environment brightness automatically selects different brightness
Show.
Preferably, in the present embodiment, ambient brightness and every group of LED string class switch unit are provided in mobile terminal in advance
The mapping table of conduction and cut-off, such 1, core of subsequent power management can be according to the brightness values of currently detected environment
It tables look-up and obtains the control strategy of switch unit in every group of LED string in the display backlight source 2, and according to the switch unit of acquisition
Control strategy is controlled, to achieve the purpose that the brightness regulation backlight display brightness according to environment.
Fig. 3 shows the circuit theory schematic diagram of 2 brightness regulation of display backlight source in a specific implementation example.In the reality
In existing example, the display backlight source 2 includes 4 groups of LED strings in parallel, and the default operating voltage of 4 groups of LED string is 3V, often
Group LED string includes 8 concatenated LED, and it is the LED of 4mA that the first LED string, which selects forward conduction electric current, and the 2nd LED string is selected positive
Conducting electric current is the LED of 8mA, and it is the LED of 16mA that the 3rd LED string, which selects forward conduction electric current, and the 4th LED string selects forward conduction
Electric current is the LED of 32mA.In the specific implementation example, preconfigured ambient brightness and every group of LED go here and there in switching means conductive/
The mapping table of cut-off is as shown in following table one:
The mapping table of 1 ambient brightness of table and switching means conductive/cut-off in every group of LED string
As seen from the above table, described preconfigured according to brightness values inquiry in specific implementation example shown in Fig. 3
The mapping table of ambient brightness and switching means conductive/cut-off in every group of LED string, obtains opens corresponding with the brightness values
Closing control strategy includes:
When the brightness values are between 0lm~10lm, switching means conductive in the 4th LED string, other LED
Switch unit in string is turned off；
When the brightness values are between 10lm~20lm, switching means conductive in the 3rd LED string, other
Switch unit in LED string is turned off；
Switch unit when the brightness values are between 20lm~40ml, in the first LED string and the 2nd LED string
It is turned off, the switch unit in the 3rd LED string and the 4th LED string is both turned on；
When the brightness values are between 40lm~80lm, switching means conductive in the 2nd LED string, other
Switch unit in LED string is turned off；
When the brightness values are between 80lm~120lm, opening in the first LED string and the 3rd LED string
It closes unit to be turned off, the switch unit in the 2nd LED string and the 4th LED string is both turned on；
When the brightness values are between 120lm~160ml, opening in the first LED string and the 4th LED string
It closes unit to be turned off, the switch unit in the 2nd LED string and the 3rd LED string is both turned on；
When the brightness values are between 160lm~200lm, the switch unit in the first LED string ends, other
Switch unit in LED string is both turned on；
When the brightness values are between 200lm~250lm, switching means conductive in the first LED string, other
Switch unit in LED string is turned off；
When the brightness values are between 250lm~300lm, opening in the first LED string and the 4th LED string
Close unit conducting, the switch unit cut-off in the 2nd LED string and the 3rd LED string；
When the brightness values are between 300lm~350lm, opening in the first LED string and the 3rd LED string
Close unit conducting, the switch unit cut-off in the 2nd LED string and the 4th LED string；
When the brightness values are between 350lm~400lm, the switch unit in the 2nd LED string ends, other
Switching means conductive in LED string；
When the brightness values are between 400lm~500lm, opening in the first LED string and the 2nd LED string
Close unit conducting, the switch unit cut-off in the 3rd LED string and the 4th LED string；
When the brightness values are between 500lm~550lm, the switch unit in the 3rd LED string ends, other
Switch unit in LED string is both turned on；
When the brightness values are between 550lm~600lm, the switch unit in the 4th LED string ends, other
Switch unit in LED string is both turned on；
When the brightness values are greater than between 600lm, the first LED string, the 2nd LED string, the 3rd LED
Switch unit in string and the 4th LED string is both turned on.
Step S203 controls 1, the power management core according to the switch-control strategy and goes here and there respectively to LED described in multiple groups
In switch unit export corresponding control signal, make LED described in multiple groups go here and there in switch unit according to the switch control plan
Slightly on or off.
In the present embodiment, 1, the power management core get it is bright with the mobile terminal current environment
After the switch-control strategy that angle value matches, corresponding control signal can be exported according to the switch-control strategy to described
Display backlight source 2 controls corresponding LED string in the display backlight source 2 and is combined luminous, and realization is adjusted according to environment
The purpose of back light source brightness.
Above as can be seen that back light brightness regulating method provided in this embodiment is set due to every group of LED string in backlight
A switch unit is set, and obtains the brightness values of the mobile terminal current environment, root in real time using 1, power management core
The corresponding relationship of preconfigured ambient brightness with switching means conductive/cut-off in every group of LED string is inquired according to the brightness values
Table obtains switch-control strategy corresponding with the brightness values, and controls the power supply pipe according to the switch-control strategy
It manages switch unit of 1, the core respectively into the string of LED described in multiple groups and exports corresponding control signal, make in the string of LED described in multiple groups
Switch unit according to the switch-control strategy on or off, so as to so that mobile terminal according to different environmental light brightness
The LED string for automatically selecting various combination is connected, so as to realize under sunburst or when the late into the night is using mobile terminal,
Backlight is adjusted to suitable brightness, user experience is promoted.
Embodiment three
Fig. 4 is the implementation process schematic diagram of back light brightness regulating method provided by Embodiment 2 of the present invention.This method is held
Row main body is 1, power management core in mobile terminal shown in Fig. 1.It is shown in Figure 4, backlight illumination tune provided in this embodiment
Section method may comprise steps of:
Step S401 obtains the brightness values of the mobile terminal current environment in real time；
Step S402 judges that the backlight shaping modes of the mobile terminal are general mode or intelligent mode；When described
When backlight shaping modes are intelligent mode, S403 is entered step；When the backlight shaping modes are general mode, enter step
S405。
In the present embodiment, shown backlight shaping modes include general mode and two kinds of intelligent mode, the mobile terminal
On be provided with backlight shaping modes switching switch, user can pass through the backlight shaping modes switching switch selection backlight adjust mould
Formula.When backlight shaping modes are under intelligent mode, enter step in S403；Backlight shaping modes be general mode under when into
Enter in step S405.
Step S403 inquires preconfigured ambient brightness and switch unit in every group of LED string according to the brightness values
The mapping table of conduction and cut-off obtains switch-control strategy corresponding with the brightness values；
Step S404 controls 1, the power management core according to the switch-control strategy and goes here and there respectively to LED described in multiple groups
In switch unit export corresponding control signal, make LED described in multiple groups go here and there in switch unit according to the switch control plan
Slightly on or off.
Step S405 adjusts display screen described in strategy adjustment according to preconfigured backlight corresponding with the general mode
The brightness of backlight 2.
In the present embodiment, it is to keep the LED be connected in backlight that backlight corresponding with the general mode, which adjusts strategy,
Go here and there it is constant, by the driving voltage for adjusting the output of power management core 1 driving voltage output end according to the brightness values of environment
The mode of size adjusts the brightness in the display backlight source 2.Such as: in specific implementation example shown in Fig. 3, when the back
When light shaping modes are general mode, the backlight adjusts strategy to keep the switch unit cut-off in the first LED string, institute
The switching means conductive in the second LED light string, the third LED light string and the 4th LED light string is stated, by according to the light
The mode that brightness value adjusts the size of the driving voltage of 1 driving voltage output end of power management core output is described to adjust
The brightness in display backlight source 2.
It should be noted that step S401 and step S403~step S404 implementation are due to respectively in the present embodiment
It is identical as step S201~implementation of step S203 in a upper embodiment, therefore details are not described herein.
It include two in back light brightness regulating method provided in this embodiment above as can be seen that relative to a upper embodiment
Kind of backlight shaping modes, user can switch switch by backlight shaping modes and voluntarily select backlight shaping modes, so as into
One step promotes user experience.
Example IV
Fig. 5 is 1, the power management core structural schematic diagram that the embodiment of the present invention four provides.For ease of description, only
Show part related to the present embodiment.
It is shown in Figure 5,1, power management core provided in this embodiment, including memory 11, processor 12 and be stored in
On the memory 11 and the computer program 13 that can run on the processor 12, the computer program 13 are described
When processor 12 executes, realize as described in above-described embodiment two or embodiment three the step of back light brightness regulating method.
1, power management core of the embodiment of the present invention is adjusted with backlight illumination described in above-described embodiment two or embodiment three
Method belongs to same design, and specific implementation process is shown in embodiment of the method in detail, and the technical characteristic in embodiment of the method is at this
Corresponding in apparatus embodiments to be applicable in, which is not described herein again.
It will appreciated by the skilled person that whole or certain steps in the present embodiment disclosed method, can be with
It is implemented as software, firmware, hardware and its combination appropriate.
Embodiment five
The embodiment of the present invention five provides a kind of storage medium, and computer program, the meter are stored on the storage medium
When calculation machine program is executed by processor, the back light brightness regulating method as described in realizing and as above state embodiment two or embodiment three is realized
The step of.
Back light brightness regulating method described in the storage medium and above-described embodiment two or embodiment three of the embodiment of the present invention
Belong to same design, specific implementation process is shown in embodiment of the method in detail, and the technical characteristic in embodiment of the method is in this equipment
Corresponding in embodiment to be applicable in, which is not described herein again.
It will appreciated by the skilled person that whole or certain steps in the present embodiment disclosed method, can be with
It is implemented as software, firmware, hardware and its combination appropriate.
In hardware embodiment, the division between functional module/unit referred in the above description is not necessarily corresponded to
In the division of physical assemblies；If for example, a physical assemblies can have multiple functions or a function or step can be by
Dry physical assemblies cooperation executes.Certain physical assemblies or all physical assemblies may be implemented as by processor, such as central processing
The software that device, digital signal processor or microprocessor execute, is perhaps implemented as hardware or is implemented as integrated circuit,
Such as specific integrated circuit.Such software can be distributed on a computer-readable medium, and computer-readable medium may include meter
Calculation machine storage medium (or non-transitory medium) and communication media (or fugitive medium).As known in those of ordinary skill in the art
, term computer storage medium is included in for storing information (such as computer readable instructions, data structure, program module
Or other data) any method or technique in implement volatile and non-volatile, removable and nonremovable medium.It calculates
Machine storage medium includes but is not limited to RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc
(DVD) or other optical disc storages, magnetic holder, tape, disk storage or other magnetic memory apparatus or can be used for storing desired
Information and any other medium that can be accessed by a computer.In addition, known to a person of ordinary skill in the art be, communication
Medium generally comprises computer readable instructions, data structure, program module or such as carrier wave or other transmission mechanisms etc
Other data in modulated data signal, and may include any information delivery media.
Preferred embodiments of the present invention have been described above with reference to the accompanying drawings, not thereby limiting the scope of the invention.This
Field technical staff without departing from the scope and spirit of the invention in made by any modifications, equivalent replacements, and improvements, should all this
Within the interest field of invention.
Claims (10)
1. a kind of back light brightness regulating method is applied to mobile terminal, which is characterized in that the mobile terminal includes display screen back
Light source and power management chip, the display backlight source include the LED string of multiple groups parallel connection, and the LED string includes: multiple LED
With a switch unit, one end is connected to the driving voltage output end of the power management chip after the multiple LED series connection, separately
One end is connected to the input terminal of the switch unit, and the output end of the switch unit is connected to the filling of the power management chip
Electric current pin, the control terminal of the switch unit are connected on the power management chip control letter corresponding with LED string
Number output end；The back light brightness regulating method includes:
The brightness values of the mobile terminal current environment are obtained in real time；
Pair of preconfigured ambient brightness with switching means conductive/cut-off in every group of LED string is inquired according to the brightness values
Relation table is answered, switch-control strategy corresponding with the brightness values is obtained；
It is defeated that switch unit of the power management chip respectively into the string of LED described in multiple groups is controlled according to the switch-control strategy
Corresponding control signal out makes the switch unit in the string of LED described in multiple groups according to the switch-control strategy on or off.
2. back light brightness regulating method as described in claim 1, which is characterized in that described to be inquired in advance according to the brightness values
The mapping table of the ambient brightness first configured and switching means conductive/cut-off in every group of LED string, obtains and the brightness values
Before corresponding switch-control strategy further include:
The backlight shaping modes for judging the mobile terminal are general mode or intelligent mode；
When the backlight shaping modes are intelligent mode, preconfigured environment is inquired according to the brightness values into described
The mapping table of brightness and switching means conductive/cut-off in every group of LED string, obtains switch control corresponding with the brightness values
Make the step of strategy；
When the backlight shaping modes are general mode, then according to preconfigured backlight tune corresponding with the general mode
Save the brightness in display backlight source described in strategy adjustment.
3. back light brightness regulating method as claimed in claim 2, which is characterized in that in the backlight shaping modes be intelligent mould
When formula, the default operating voltage of the string of LED described in multiple groups is identical, and the forward conduction electric current of the LED selected in different LED strings is different.
4. back light brightness regulating method as claimed in claim 3, which is characterized in that the display backlight source include 4 groups simultaneously
The LED of connection goes here and there, and the default operating voltage of 4 groups of LED string is 3V, and it is the LED of 4mA that the first LED string, which selects forward conduction electric current, the
It is the LED of 8mA, the LED that the 3rd LED string selection forward conduction electric current is 16mA, the 4th that two LED string, which selects forward conduction electric current,
It is the LED of 32mA that LED string, which selects forward conduction electric current,.
5. back light brightness regulating method as claimed in claim 4, which is characterized in that matched in advance according to brightness values inquiry
The mapping table of the ambient brightness set and switching means conductive/cut-off in every group of LED string, obtains corresponding with the brightness values
Switch-control strategy include:
When the brightness values are between 0lm~10lm, switching means conductive in the 4th LED string, in other LED string
Switch unit be turned off；
When the brightness values are between 10lm~20lm, switching means conductive in the 3rd LED string, other LED string
In switch unit be turned off；
When the brightness values are between 20lm~40ml, the switch unit in the first LED string and the 2nd LED string is cut
Only, the switch unit in the 3rd LED string and the 4th LED string is both turned on；
When the brightness values are between 40lm~80lm, switching means conductive in the 2nd LED string, other LED string
In switch unit be turned off；
Switch list when the brightness values are between 80lm~120lm, in the first LED string and the 3rd LED string
Member is turned off, and the switch unit in the 2nd LED string and the 4th LED string is both turned on；
Switch list when the brightness values are between 120lm~160ml, in the first LED string and the 4th LED string
Member is turned off, and the switch unit in the 2nd LED string and the 3rd LED string is both turned on；
When the brightness values are between 160lm~200lm, the switch unit in the first LED string ends, other LED
Switch unit in string is both turned on；
When the brightness values are between 200lm~250lm, switching means conductive in the first LED string, other LED
Switch unit in string is turned off；
Switch list when the brightness values are between 250lm~300lm, in the first LED string and the 4th LED string
Switch unit cut-off in member conducting, the 2nd LED string and the 3rd LED string；
Switch list when the brightness values are between 300lm~350lm, in the first LED string and the 3rd LED string
Switch unit cut-off in member conducting, the 2nd LED string and the 4th LED string；
When the brightness values are between 350lm~400lm, the switch unit in the 2nd LED string ends, other LED
Switching means conductive in string；
Switch list when the brightness values are between 400lm~500lm, in the first LED string and the 2nd LED string
Switch unit cut-off in member conducting, the 3rd LED string and the 4th LED string；
When the brightness values are between 500lm~550lm, the switch unit in the 3rd LED string ends, other LED
Switch unit in string is both turned on；
When the brightness values are between 550lm~600lm, the switch unit in the 4th LED string ends, other LED
Switch unit in string is both turned on；
When the brightness values are greater than between 600lm, the first LED string, the 2nd LED string, the 3rd LED string and
Switch unit in the 4th LED string is both turned on.
6. back light brightness regulating method as claimed in claim 4, which is characterized in that when the backlight shaping modes are common mould
When formula, then the bright of display backlight source described in strategy adjustment is adjusted according to preconfigured backlight corresponding with the general mode
Degree includes:
When the backlight shaping modes are general mode, the backlight adjusts strategy to keep opening in the first LED string
It closes unit to end, the switching means conductive in second LED light string, the third LED light string and the 4th LED light string,
By the size for adjusting the driving voltage of power management chip driving voltage output end output according to the brightness values
Mode adjusts the brightness in the display backlight source.
7. back light brightness regulating method as described in claim 1, which is characterized in that the switch unit is metal-oxide-semiconductor, described
The grid of metal-oxide-semiconductor is the control terminal of the switch unit, and the drain electrode of the metal-oxide-semiconductor is the input terminal of the switch unit, described
The source electrode of metal-oxide-semiconductor is the output end of the switch unit.
8. a kind of power management chip, which is characterized in that including memory, processor and be stored on the memory and can be
The computer program run on the processor when the computer program is executed by the processor, is realized as right is wanted
The step of seeking any one of 1 to 7 the method.
9. a kind of storage medium, which is characterized in that be stored with computer program, the computer program quilt on the storage medium
When processor executes, realize such as the step of any one of claims 1 to 7 the method.
10. a kind of mobile terminal, which is characterized in that including display backlight source and power management core as claimed in claim 8
Piece, the display backlight source include the LED string of multiple groups parallel connection, and the LED string includes: multiple LED and switch unit, institute
The driving voltage output end that one end after multiple LED connect is connected to the power management chip is stated, the other end is connected to described open
The input terminal of unit is closed, the output end of the switch unit is connected to the sink current pin of the power management chip, described to open
The control terminal for closing unit is connected on the power management chip control signal output corresponding with LED string.
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