CN104575444B - Brightness controlling device and brightness control method - Google Patents
Brightness controlling device and brightness control method Download PDFInfo
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- CN104575444B CN104575444B CN201310497393.7A CN201310497393A CN104575444B CN 104575444 B CN104575444 B CN 104575444B CN 201310497393 A CN201310497393 A CN 201310497393A CN 104575444 B CN104575444 B CN 104575444B
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- brightness
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Abstract
A kind of brightness controlling device and brightness control method.First pulse width modulation signal of indication display brightness is converted to direct current signal by converting unit.Direct current signal is converted to the second pulse width modulation signal by the one of the load condition of analog digital converting unit foundation environmental condition and electronic installation at least, wherein the second pulse width modulation signal makes it normally to operate to control the brightness of display.
Description
【Technical field】
The invention relates to a kind of control device, and in particular to a kind of brightness controlling device and brilliance control side
Method.
【Background technology】
Computer can divide into the computer and general computer of military-industry rule, the computer of military-industry rule and general computer
Difference be that the computer of military-industry rule need to often be used in the presence of a harsh environment, such as made under the adverse circumstances of high temperature or low temperature
With, therefore the computer of military-industry rule is much larger than general computer for the demand of the adaptability of environment temperature, and general computer
The factor such as compact lain in, for the emphasis that the computer of military-industry rule is anti-rather than mainly considers.
When the computer of military-industry rule is operated under the severe environment such as high temperature or low temperature, generally require by control display
Brightness the computer of military-industry rule can be normally operated.For example at high temperature, the luminance-reduction of display to avoid
There is the situation of blank screen in display.And at low temperature, then need the luminance-reduction display to avoid power consumption excessive (because of low temperature
Start for a long time, and can will adjust the work(of other components to heat).In addition, in the case of heavy duty, also needing the brightness display
Reduce to reduce the power consumption of total system.
Before Windows Windows8 appearance, the brightness of display is the pulse exported by embedded controller
Width modulation signal carries out the control of brightness, therefore can reach the above-mentioned function of freely adjusting brightness, but in Windows8
Framework under display brightness be by Windows display driver model (Windows Display Driver
Model, WDDM) controlled, that is to say, that the brightness of display passes through the driver of Windows display driver model
The pulse width modulation signal of control platform control hub (Platform Controller Hub, PCH) output is bright to carry out
The control of degree, thus the brightness of display can not be adjusted in the case of high temperature, low temperature or heavy duty according to traditional mode and reached
The purpose for making computer normally to operate.
【The content of the invention】
The present invention provides a kind of brightness controlling device and brightness control method, can be in the case of high temperature, low temperature or heavy duty
Adjustment uses the display brightness of the electronic installation of Windows8 operating systems, and then electronic installation is normally operated.
The present invention brightness controlling device, suitable for control an electronic installation display brightness, including converting unit with
Analog digital converting unit.First pulse width modulation signal is converted to direct current signal by converting unit, wherein the first pulse is wide
Spend the brightness of modulating signal indication display.Analog digital converting unit couples converting unit, according to environmental condition and electronics
Direct current signal is converted to the second pulse width modulation signal, the second pulse width modulation by the one of the load condition of device at least
Brightness of the signal to control display.
In one embodiment of this invention, above-mentioned analog digital converting unit is also according to environmental condition and electronic installation
Load condition one at least produce a work ratio, and believe according to work than changing direct current signal into the second pulse width modulation
Number.
In one embodiment of this invention, above-mentioned environmental condition includes environment temperature, and analog digital converting unit is in ring
When border temperature is higher than the first preset temperature or less than the second preset temperature, the work ratio of the second pulse width modulation signal is adjusted,
So that the brightness adjustment of display to be extremely less than to default low-light level.
In one embodiment of this invention, above-mentioned environmental condition includes ambient light intensity, analog digital converting unit
When ambient light intensity is higher than default luminous intensity, the work ratio of the second pulse width modulation signal is adjusted, by display
Brightness adjustment is to higher than default high brightness.
In one embodiment of this invention, above-mentioned analog digital converting unit is in heavy duty state in electronic installation
When, the work ratio of the second pulse width modulation signal is adjusted, by the brightness adjustment of display to less than default low-light level.
In one embodiment of this invention, above-mentioned converting unit includes bandpass filtering unit and low-pass filter unit.
Wherein bandpass filtering unit carries out bandpass filtering to the first pulse width modulation signal.Low-pass filter unit couples bandpass filtering list
Member and analog digital converting unit, carry out LPF, to produce direct current signal to the signal of bandpass filtering unit output end.
In one embodiment of this invention, above-mentioned bandpass filtering unit includes operational amplifier, first resistor, the first electricity
Appearance, second resistance and the second electric capacity.Wherein the positive input terminal of operational amplifier couples reference voltage.First resistor coupling operation
The negative input end of amplifier.First electric capacity is coupled between the negative input end of operational amplifier and ground connection.Second electric capacity and second
Resistor coupled in parallel is between the negative input end and output end of operational amplifier.
In one embodiment of this invention, above-mentioned low-pass filter unit includes a resistance and an electric capacity.Wherein, resistance
It is coupled between the output end of bandpass filtering unit and the output end of low-pass filter unit.Electric capacity is coupled to low-pass filter unit
Between output end and ground connection.
The brightness control method of the present invention, it is adaptable to which the display of electronic installation, brightness control method comprises the following steps.
First pulse width modulation signal is converted into direct current signal, wherein the first pulse width modulation signal indication display is bright
Degree.Direct current signal is converted to the second pulse width and adjusted by the one of load condition at least according to environmental condition and electronic installation
Varying signal, brightness of second pulse width modulation signal to control display.
In one embodiment of this invention, the one of the above-mentioned load condition according to environmental condition and electronic installation at least
The step of direct current signal is converted into the second pulse width modulation signal comprises the following steps.Filled according to environmental condition and electronics
The one of the load condition put at least produces a work ratio.Believe according to work than changing direct current signal into the second pulse width modulation
Number.
In one embodiment of this invention, above-mentioned environmental condition includes environment temperature, when environment temperature is preset higher than first
Temperature or during less than the second preset temperature, adjusts the work ratio of the second pulse width modulation signal, the brightness of display is adjusted
It is whole to be extremely less than default low-light level.
In one embodiment of this invention, above-mentioned environmental condition includes ambient light intensity, when ambient light intensity is high
When default luminous intensity, the work ratio of the second pulse width modulation signal is adjusted, by the brightness adjustment of display to higher than pre-
If high brightness.
In one embodiment of this invention, wherein when electronic installation is in heavy duty state, adjusting the second pulse width
The work ratio of modulating signal, by the brightness adjustment of display to less than default low-light level.
Compared to prior art, the present invention is by converting unit by the first pulse width modulation of the brightness of indication display
Signal is converted to direct current signal, and by the next foundation environmental condition of analog digital converting unit and the load condition of electronic installation
Direct current signal is converted to the second pulse width modulation signal by one at least, with regarding the electronics using Windows8 operating systems
The operation situation of environment temperature or electronic installation residing for device adjusts the brightness of display, and it is normally operated.
【Brief description of the drawings】
Fig. 1 is schematically shown as the schematic diagram of the brightness controlling device of one embodiment of the invention.
Fig. 2 is schematically shown as the schematic diagram of the brightness controlling device of another embodiment of the present invention.
Fig. 3 is schematically shown as the schematic diagram of the converting unit of one embodiment of the invention.
Fig. 4 is schematically shown as the schematic flow sheet of the brightness control method of one embodiment of the invention.
【Embodiment】
Fig. 1 is schematically shown as the schematic diagram of the brightness controlling device of one embodiment of the invention.It refer to Fig. 1, brightness controlling device
100 include converting unit 102 and analog digital converting unit 104.Wherein converting unit 102 couples analog digital converting unit
104, the brightness of display of the brightness controlling device 100 to control electronic installation, electronic installation may be, for example, that notes type is calculated
Machine or desktop PC etc..Converting unit 102 to by pulse width modulation signal PWM1 (such as from platform courses collection
The pulse width modulation signal of line device) direct current signal DC1 is converted to, wherein pulse width modulation signal PWM1 indicates platform courses
The brightness that hub display to be made is shown.Load of the analog digital converting unit 104 according to environmental condition and electronic installation
Direct current signal is converted to pulse width modulation signal PWM2 by the one of state at least, and wherein pulse width modulation signal PWM2 is used
To control the brightness of display.Analog digital converting unit 104 can be for example with KBC（Keyboard Controller,
KBC）To implement, so it is not limited.
Fig. 2 is schematically shown as the schematic diagram of the brightness controlling device of another embodiment of the present invention.Fig. 2 is refer to, in the present embodiment
In, brightness controlling device 200 also includes Windows display driver model compared to brightness controlling device 100
(Windows Display Driver Model, WDDM) unit 206, (Platform of platform courses hub 208
Controller Hub, PCH) and display panel 210.Wherein the coupling of platform courses hub 208 Windows is shown
Driver model unit 206 and converting unit 102, analog digital converting unit 104 are also coupled to display panel 210.Window operation
The control platform of system display driver model unit 206 controls the output pulse width modulating signal PWM1 of hub 208 to carry out
The control of brightness.Converting unit 102 receives the pulse width modulation signal PWM1 from platform courses hub 208, and by arteries and veins
Rush width modulation signal PWM1 and be converted to direct current signal DC1, wherein pulse width modulation signal PWM1 indicates platform courses line concentration
The brightness that the display to be made of device 208 is shown, that is, the brightness of display panel 210.Analog digital converting unit 104 is according to environment bar
Direct current signal is converted to pulse width modulation signal PWM2 by the one of the load condition of part and electronic installation at least, its middle arteries
Rush brightness of the width modulation signal PWM2 to control display panel 210.
Specifically, above-mentioned environmental condition may be, for example, the environment temperature or ambient light intensity residing for electronic installation,
It can be after the equipment sensing such as temperature in use sensor (not illustrating) and optical sensor (not illustrating), then by detecting result S1
Analog digital converting unit 104 is informed, so that analog digital converting unit 104 determines how to export pulse according to detecting result S1
Width modulation signal PWM2.When environmental condition is less harsh, such as the environment temperature residing for electronic installation is in normal temperature model
In enclosing and when ambient light intensity is not also strong, it is wide that analog digital converting unit 104 can export pulse according to direct current signal DC1
Spend modulating signal PWM2.Wherein direct current signal DC1 is is converted by pulse width modulation signal PWM1, therefore pulse width is adjusted
Varying signal PWM1 work than will react in direct current signal DC1 level, and pass through analog digital converting unit 104 can will directly
Stream signal DC1 be reconverted into work identical with pulse width modulation signal PWM1 than pulse width modulation signal PWM2.
That is, when environmental condition is less harsh, the work that analog digital converting unit 104 can be according to pulse width modulation signal PWM1
Than producing pulse width modulation signal PWM2, so that the brightness of display meets platform courses hub display to be made and shown
The brightness shown.
If on the contrary, in the case of environmental condition is more harsh, that is, environment temperature residing for electronic installation is not normal
In temperature range, or ambient light intensity makes very much the user of electronic installation can not understand shown by identification display strongly
During content, analog digital converting unit 104 can produce pulse width modulation signal PWM2 not based on direct current signal DC1, and according to
Work is produced according to environmental condition than the pulse width modulation signal PWM2 different from pulse width modulation signal PWM1, that is, is detected
As a result S1 is with the brightness by the brightness adjustment of display extremely suitable for being shown under current environmental condition.
Specifically, analog digital converting unit 104 can receive the detecting result S1 of said temperature sensor, and sentence according to this
Whether disconnected, adjustment pulse width modulation signal PWM2, for example, can determine whether environment temperature higher than the first preset temperature or less than second
Preset temperature, wherein the first preset temperature is higher than the second preset temperature.If environment temperature is higher than the first preset temperature or less than the
Two preset temperatures, that is, environment temperature is too high or too low, when outside normal temperature range, analog digital converting unit 104 according to
The pulse width modulation signal PWM2 of its output work ratio is adjusted according to environment temperature, by the brightness adjustment of display to less than one
Default low-light level.So the display of electronic installation just can be avoided to occur the situation of blank screen in high temperature, also or avoided low
Power consumption is excessive when warm, and then influences normal operation or the normal boot-strap of electronic installation.
In addition, analog digital converting unit 104 can also receive the detecting result S1 of above-mentioned optical sensor, and ring is judged according to this
Whether environmental light intensity if ambient light intensity be higher than default luminous intensity, and make it that user can not clear higher than default luminous intensity
When Chu recognizes the content shown by display, the adjustment pulse width modulation signal of analog digital converting unit 104 PWM2 work
Than by the brightness adjustment of display to higher than a default high brightness, to overcome ambient light intensity effect user viewing display
The problem of device display content.
In addition, analog digital converting unit 104 also can determine whether whether electronic installation is in heavy duty state, if electronic installation
In heavy duty state, analog digital converting unit 104 can adjust pulse width modulation signal PWM2 work ratio, by display
Brightness adjustment to less than default low-light level, to lower the power consumption of electronic installation, extend the use time of electronic installation.
It is worth noting that, above-mentioned default high brightness and default low-light level are Windows display driver model
The higher limit and lower limit of the brightness for the display that control platform control hub can be adjusted.To make electronic installation may conform to army
The requirement of work rule or other particular/special requirements, the arteries and veins that analog digital converting unit 104 can be exported not based on platform courses hub
Width modulation signal PWM1 work is rushed than adjusting the brightness of display, and according to above-mentioned environmental condition and electronic installation
The one of load condition at least the brightness of display is adjusted to higher than default high brightness according to pulse width modulation signal PWM2 or
Less than default low-light level, electronic installation is set also can normally to be operated under harsh environmental condition.
Fig. 3 is schematically shown as the schematic diagram of the converting unit of one embodiment of the invention.Fig. 3 is refer to, specifically, Fig. 2's turns
The embodiment for changing unit 102 can be as shown in Figure 3.Converting unit 102 includes bandpass filtering unit 302 and low-pass filter unit
304, wherein the coupled belt pass filtering unit 302 of low-pass filter unit 304 and analog digital converting unit 104.Specifically, band logical
The embodiment of filter unit 302 and low-pass filter unit 304 can be as shown in Figure 3.Bandpass filtering unit 302 include resistance R1,
R2, electric capacity C1, C2 and operational amplifier A1, low-pass filter unit 304 then include resistance R3 and electric capacity C3.Wherein resistance R2 with
Electric capacity C2 is parallel between operational amplifier A1 negative input end and output end, resistance R1 one end coupling operational amplifier A1's
Negative input end, the other end then receives pulse width modulation signal PWM1, and electric capacity C1 is coupled to operational amplifier A1 negative input end
Between ground connection, and operational amplifier A1 positive input terminal then couples reference voltage Vref.Put in addition, resistance R3 is coupled to operation
Between big device A1 output end and analog digital converting unit 104, electric capacity C3 be then coupled to operational amplifier A1 output end with
Between ground connection.
As shown in figure 3, pulse width modulation signal PWM1 self-resistances R1 one end is input to bandpass filtering unit 302,
Bandpass filtering is carried out by resistance R1, R2, electric capacity C1, C2 and operational amplifier A1 the bandpass filtering unit 302 constituted, carried out
Signal after bandpass filtering is then output to low-pass filter unit 304 and carries out LPF, and then produces output to simulation number
The direct current signal DC1 of word converting unit 104.
Fig. 4 is schematically shown as the schematic flow sheet of the brightness control method of one embodiment of the invention.Fig. 4 is refer to, is concluded above-mentioned
The brightness control method of brightness controlling device may include the following steps.First, the first pulse width modulation signal is converted to directly
Flow signal (step S402), wherein the first pulse width modulation signal indicate platform courses hub display to be made show it is bright
Degree.Then, direct current signal is converted to the second pulse by the one of the load condition of foundation environmental condition and electronic installation at least
Width modulation signal (step S404), wherein brightness of second pulse width modulation signal to control display.Specifically,
Step S404 may include that first the one of the load condition of foundation environmental condition and electronic installation at least produces a job than (step
Rapid S404A), direct current signal then is changed into the second pulse width modulation signal (step S404B) according to work ratio again, its middle ring
Border condition includes environment temperature and ambient light intensity.
Furthermore, it is understood that the mode of the above-mentioned work ratio that the second pulse width modulation signal is adjusted according to environmental condition can example
Such as it is, when environment temperature is higher than the first preset temperature or less than the second preset temperature, to adjust the second pulse width modulation signal
Work ratio, by the brightness adjustment of display to less than default low-light level.Or be, when ambient light intensity is higher than default
During luminous intensity, the work ratio of the second pulse width modulation signal is adjusted, the brightness adjustment of display is default highlighted to being higher than
Degree.In addition, the mode for the work ratio that the load condition according to electronic installation adjusts the second pulse width modulation signal then can be such as
When electronic installation is in heavy duty state, the work ratio of the second pulse width modulation signal to be adjusted, by the bright of display
Degree is adjusted to be below default low-light level.
In summary, the present invention changes the first pulse width modulation signal of indication display brightness by converting unit
For direct current signal, and the load condition one at least by analog digital converting unit according to environmental condition and electronic installation
Direct current signal is converted into the second pulse width modulation signal, with regarding residing for the electronic installation using Windows8 operating systems
The operation situation of environment temperature, ambient light intensity or electronic installation adjusts the brightness of display, and it is normally operated.
Claims (11)
1. a kind of brightness controlling device, the brightness of the display suitable for controlling an electronic installation, it is characterised in that described device bag
Include:
One Windows display driver model unit；
One platform courses hub, couples the Windows display driver model unit, and the Windows is shown
Driver model unit controls the platform courses hub to export one first pulse width modulation signal；
One converting unit, couples the platform courses hub, and one first pulse width modulation signal is converted into direct current letter
Number, wherein first pulse width modulation signal indicates the brightness of the display；
One analog digital converting unit, couples the converting unit；
Wherein, when at least one load condition of an environmental condition and the electronic installation meets a preparatory condition, the simulation
The direct current signal is converted to one the 3rd pulse width modulation signal by digital conversion unit, and the 3rd pulse width modulation signal is used
Using by the brightness adjustment of the display as less than a default low-light level or higher than a default high brightness；
Otherwise, the direct current signal is converted to one second pulse width modulation signal by the analog digital converting unit, second arteries and veins
Rushing width modulation signal has and the first pulse width modulation signal identical work ratio, second pulse width modulation signal
The brilliance control of the display is preset between low-light level and the default high brightness in this；
Wherein, above-mentioned default high brightness and default low-light level are Windows display driver model cootrol platform courses
The higher limit and lower limit of the brightness for the display that hub can be adjusted.
2. brightness controlling device according to claim 1, it is characterised in that the environmental condition includes an environment temperature, should
Preparatory condition is the environment temperature higher than one first preset temperature or less than one second preset temperature, wherein first preset temperature
Higher than second preset temperature.
3. brightness controlling device according to claim 1, it is characterised in that it is strong that the environmental condition includes an ambient light
Degree, the preparatory condition is the ambient light intensity higher than a default luminous intensity.
4. brightness controlling device according to claim 1, it is characterised in that the preparatory condition is that the electronic installation is in weight
Load.
5. brightness controlling device according to claim 1, it is characterised in that the converting unit includes：
One bandpass filtering unit, bandpass filtering is carried out to first pulse width modulation signal；
One low-pass filter unit, couples the bandpass filtering unit and the analog digital converting unit, defeated to the bandpass filtering unit
The signal for going out end carries out LPF, to produce the direct current signal.
6. brightness controlling device according to claim 5, it is characterised in that the bandpass filtering unit includes：
One operational amplifier, its positive input terminal couples a reference voltage；
One first resistor, couples the negative input end of the operational amplifier；
One first electric capacity, is coupled between the negative input end of the operational amplifier and a ground connection；
One second resistance；
One second electric capacity, is parallel between the negative input end of the operational amplifier and output end with the second resistance.
7. brightness controlling device according to claim 5, it is characterised in that the low-pass filter unit includes：
One resistance, is coupled between the output end of the bandpass filtering unit and the output end of the low-pass filter unit；And
One electric capacity, is coupled between the output end of the low-pass filter unit and a ground connection.
8. a kind of brightness control method, it is adaptable to the display of an electronic installation, it is characterised in that methods described includes:
One first pulse width modulation signal is converted into a direct current signal；
Judge whether the load condition of an environmental condition and the electronic installation meets a preparatory condition；
If at least one load condition of the environmental condition and the electronic installation meets the preparatory condition, following walk is carried out
Suddenly：
The direct current signal is converted into one the 3rd pulse width modulation signal, the 3rd pulse width modulation signal have with this
The different work ratio of one pulse width modulation signal；
According to the 3rd pulse width modulation signal by the brightness adjustment of the display for less than a default low-light level or higher than one
Default high brightness；
Otherwise, follow the steps below：
The direct current signal is converted into one second pulse width modulation signal, second pulse width modulation signal have with this
One pulse width modulation signal identical work ratio；
According to second pulse width modulation signal by the brilliance control of the display in the default low-light level and the default height
Between brightness；
Wherein, above-mentioned default high brightness and default low-light level are Windows display driver model cootrol platform courses
The higher limit and lower limit of the brightness for the display that hub can be adjusted.
9. brightness control method according to claim 8, it is characterised in that the environmental condition includes an environment temperature, should
Preparatory condition is the environment temperature higher than one first preset temperature or less than one second preset temperature, wherein first preset temperature
Higher than second preset temperature.
10. brightness control method according to claim 8, it is characterised in that it is strong that the environmental condition includes an ambient light
Degree, the preparatory condition is the ambient light intensity higher than a default luminous intensity.
11. brightness control method according to claim 8, it is characterised in that the preparatory condition is the negative of the electronic installation
Load state is heavy duty.
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| CN201310497393.7A CN104575444B (en) | 2013-10-22 | 2013-10-22 | Brightness controlling device and brightness control method |
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| CN201310497393.7A CN104575444B (en) | 2013-10-22 | 2013-10-22 | Brightness controlling device and brightness control method |
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| CN104575444B true CN104575444B (en) | 2017-11-03 |
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| CN107036055A (en) * | 2017-04-12 | 2017-08-11 | 深圳市裕富照明有限公司 | Expanded type lamp socket |
| CN111968596B (en) * | 2020-08-06 | 2021-08-03 | Tcl通讯（宁波）有限公司 | Display method, display device, storage medium and mobile terminal |
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| US8803787B2 (en) * | 2007-09-18 | 2014-08-12 | Japan Display Inc. | Liquid crystal display apparatus |
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| TWI308315B (en) * | 2005-12-23 | 2009-04-01 | Innolux Display Corp | Liquid crystal display and method for adjusting it |
| CN101645231A (en) * | 2009-04-02 | 2010-02-10 | 青岛海信电器股份有限公司 | Method and device for regulating back light brightness of display |
| CN101707832A (en) * | 2009-08-25 | 2010-05-12 | 超亮显示系统（深圳）有限公司 | High-power driving power supply applied to ultra-bright LED direct type backlight module of LCD |
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