CN209029084U - A kind of brightness of display screen regulating system and wearable device - Google Patents
A kind of brightness of display screen regulating system and wearable device Download PDFInfo
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- CN209029084U CN209029084U CN201822001091.7U CN201822001091U CN209029084U CN 209029084 U CN209029084 U CN 209029084U CN 201822001091 U CN201822001091 U CN 201822001091U CN 209029084 U CN209029084 U CN 209029084U
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Abstract
The utility model discloses a kind of brightness of display screen regulating system and wearable devices, including photosensitive sensors, boost module, controller and display screen；It is connected with first resistor configuration module between the feedback end and ground terminal of boost module, is connected with second resistance configuration module between the voltage output end and feedback end of boost module；The photosensitive sensors generate inductive signal according to ambient brightness and are sent to controller, controller adjusts the resistance value of the second resistance configuration module and/or first resistor configuration module according to ambient brightness, and the supply voltage for exporting boost module follows the variation of ambient brightness to automatically adjust；The display screen receives the supply voltage, according to the brightness of the variation adjustment display screen of supply voltage.The utility model allows the brightness of display screen to follow the change of external environment brightness and adaptively adjust, and achieve the effect that reduce display screen power consumption simultaneously according to the supply voltage of the variation automatic adjustment display screen of ambient brightness.
Description
Technical field
The utility model belongs to display device technology field, specifically, being to be related to one kind for adjusting brightness of display screen
System design.
Background technique
OLED(Organic Light-Emitting Diode) i.e. Organic Light Emitting Diode, also known as organic electric laser is aobvious
Show, organic luminous semiconductor.PM OLED(Passive matrix OLED) i.e. passive-matrix Organic Light Emitting Diode, using PM
The display screen of OLED design is referred to as PM OLED screen.Since PM OLED screen does not need backlight, whole structural thickness than relatively thin,
Therefore, there is relatively broad application in ultrathin electronic product (such as ultra thin handset, wrist strap class wearable device).
Since wrist strap class wearable device is limited by small product size, the capacity of internal battery is generally less big, in order to mention
Need to reduce the power consumption of product the cruise duration of high product.In wrist strap class wearable device, the bigger component of power consumption is it
Display screen, it is possible to reduce the Overall Power Consumption of product by optimizing the power consumption of display screen.
For the wrist strap class wearable device using the design of PM OLED screen, due to the power consumption and PM OLED screen of PM OLED screen
Supply voltage it is related, supply voltage is higher, and the brightness of pixel is also higher, so that power consumption is also bigger.Therefore, how one is designed
Supply voltage adjusting method is planted to improve the brightness of PM OLED screen, thus guaranteeing the clearly visible premise of screen display content
Under, the power consumption of PM OLED screen is reduced as much as possible, is that one in terms of power dissipation design of current wrist strap class wearable device mainly grinds
Study carefully direction.
Summary of the invention
The purpose of this utility model is to provide a kind of brightness of display screen regulating systems, can be adaptive according to ambient brightness
Ground adjusts the supply voltage of display screen, to realize the adjust automatically of brightness of display screen, and further reaches improvement display screen power consumption
Purpose.
In order to solve the above technical problems, the utility model is achieved using following technical scheme:
In one aspect, the utility model proposes a kind of brightness of display screen regulating systems, including photosensitive sensors, boosting
Module, controller and display screen；The photosensitive sensors incude ambient brightness, and generate corresponding inductive signal；The boosting
Module receive input power, and to input power carry out boosting inverter after, pass through its voltage output end export supply voltage；It is described
Boost module further includes feedback end and ground terminal, and first resistor configuration module is connected between the feedback end and ground terminal,
Second resistance configuration module is connected between the voltage output end and feedback end, the boost module is matched according to second resistance
Set the supply voltage of its output of the resistance value of module and the ratio variation adjustment of the resistance value of first resistor configuration module；The controller
The inductive signal for receiving photosensitive sensors output adjusts the second resistance configuration module and/or the according to ambient brightness
The resistance value of one resistance configuration module, the supply voltage for exporting boost module follow the variation of ambient brightness to automatically adjust；It is described
Display screen receives the supply voltage, according to the brightness of the variation adjustment display screen of supply voltage.
Further, it is designed as the physical circuit of the first resistor configuration module and second resistance configuration module, this
Utility model proposes following six kinds of preferred embodiments:
The resistance value of first scheme, the first resistor configuration module is fixed, including at least one fixed resistance, the fixation
Resistance is connected between the feedback end and ground terminal of the boost module；The resistance value of the second resistance configuration module is adjustable, packet
M configuration resistance and M switch element are included, the M is the integer greater than 1；The M configuration resistance and M switch element
After switch ways connect one to one, it is connected between the voltage output end and feedback end of the boost module, it is described to open
Element on-off under the control for the switching signal that the controller exports is closed, to change the effective of the second resistance configuration module
Resistance value.
The resistance value of alternative plan, the first resistor configuration module is fixed, including at least one fixed resistance, the fixation
Resistance is connected between the feedback end and ground terminal of the boost module；The resistance value of the second resistance configuration module is adjustable, packet
At least one fixed resistance, M configuration resistance and M switch element are included, the M is positive integer；The fixed resistance directly connects
It connects between the voltage output end and feedback end of the boost module；The switch of the M configuration resistance and M switch element is logical
After road connects one to one, it is connected between the voltage output end and feedback end of the boost module；The switch element
The on-off under the control of the switching signal of controller output, to change effective resistance value of the second resistance configuration module.
The resistance value of third program, the first resistor configuration module is adjustable, including N number of configuration resistance and N number of switch element,
The N is the integer greater than 1；After the switch ways of N number of configuration resistance and N number of switch element connect one to one, respectively
It is connected between the feedback end and ground terminal of the boost module, the switching signal that the switch element is exported in the controller
Control under on-off, to change effective resistance value of the first resistor configuration module；The resistance value of the second resistance configuration module
It fixes, including at least one fixed resistance, the fixed resistance are connected to the voltage output end and feedback end of the boost module
Between.
The resistance value of fourth program, the first resistor configuration module is adjustable, including at least one fixed resistance, N number of configuration
Resistance and N number of switch element, the N are positive integer；The fixed resistance be connected directly between the feedback end of the boost module with
Between ground terminal；After the switch ways of N number of configuration resistance and N number of switch element connect one to one, it is connected to institute
It states between the feedback end of boost module and ground terminal；The switch element is under the control for the switching signal that the controller exports
On-off, to change effective resistance value of the first resistor configuration module；The resistance value of the second resistance configuration module is fixed, including
At least one fixed resistance, the fixed resistance are connected between the voltage output end and feedback end of the boost module.
The resistance value of 5th scheme, the first resistor configuration module is adjustable, including N number of configuration resistance and N number of switch element,
The N is the integer greater than 1；After the switch ways of N number of configuration resistance and N number of switch element connect one to one, respectively
It is connected between the feedback end and ground terminal of the boost module, the switching signal that the switch element is exported in the controller
Control under on-off, to change effective resistance value of the first resistor configuration module；The resistance value of the second resistance configuration module
It is adjustable, including M configuration resistance and M switch element, the M are the integer greater than 1；The M configuration resistance and M switch
After the switch ways of element connect one to one, it is connected between the voltage output end and feedback end of the boost module,
Switch element on-off under the control for the switching signal that the controller exports, to change the second resistance configuration module
Effective resistance value.
The resistance value of 6th scheme, the first resistor configuration module is adjustable, including at least one fixed resistance, N number of configuration
Resistance and N number of switch element, the N are positive integer；The fixed resistance be connected directly between the feedback end of the boost module with
Between ground terminal；After the switch ways of N number of configuration resistance and N number of switch element connect one to one, it is connected to institute
It states between the feedback end of boost module and ground terminal；The switch element is under the control for the switching signal that the controller exports
On-off, to change effective resistance value of the first resistor configuration module；The resistance value of the second resistance configuration module is adjustable, including
At least one fixed resistance, M configuration resistance and M switch element, the M are positive integer；The fixed resistance is directly connected to
Between the voltage output end and feedback end of the boost module；The switch ways of M the configuration resistance and M switch element
After connecting one to one, it is connected between the voltage output end and feedback end of the boost module；The switch element exists
On-off under the control of the switching signal of the controller output, to change effective resistance value of the second resistance configuration module.
Preferably, the switch element in the first resistor configuration module preferably uses NMOS tube, the grid of the NMOS tube
Pole connects the controller, and the drain electrode of NMOS tube connects the feedback end of the boost module, and the source electrode of NMOS tube passes through the first electricity
Configuration resistance in resistance configuration module connects the ground terminal of the boost module, and the ground terminal connects ground wire.
Preferably, the switch element in the second resistance configuration module preferably uses PMOS tube, the grid of the PMOS tube
Pole connects the controller, and the voltage output end of the boost module is connected by pull-up resistor, the source electrode connection of PMOS tube
The drain electrode of the voltage output end of the boost module, PMOS tube passes through described in the configuration resistance connection in second resistance configuration module
The feedback end of boost module.
On the other hand, the utility model also proposed a kind of wearable device, including photosensitive sensors, boost module,
Controller and display screen；The photosensitive sensors incude ambient brightness, and generate corresponding inductive signal；The boost module connects
Receive input power, and to input power carry out boosting inverter after, pass through its voltage output end export supply voltage；The boosting mould
Block further includes feedback end and ground terminal, first resistor configuration module is connected between the feedback end and ground terminal, described
Second resistance configuration module is connected between voltage output end and feedback end, the boost module is according to second resistance configuration module
Resistance value and first resistor configuration module resistance value ratio variation adjustment its output supply voltage；The controller receives institute
The inductive signal for stating photosensitive sensors output adjusts the second resistance configuration module and/or first resistor according to ambient brightness
The resistance value of configuration module, the supply voltage for exporting boost module follow the variation of ambient brightness to automatically adjust；The display screen
The supply voltage is received, according to the brightness of the variation adjustment display screen of supply voltage.
Compared with prior art, the advantages and positive effects of the utility model are as follows: the brightness of display screen tune of the utility model
Section system can be such that the brightness of display screen follows outer according to the supply voltage of the variation automatic adjustment display screen of ambient brightness
The change of boundary's ambient brightness and adaptive adjusting, it is aobvious by reducing under the premise of guaranteeing that screen display content is clearly visible
The supply voltage of display screen can achieve the effect for reducing display screen power consumption.It is applied in wrist strap class wearable device, it can be with
The Overall Power Consumption for significantly reducing wearable device, extends the cruise duration of wearable device, improves the usage experience of user.
After the detailed description of the utility model embodiment is read in conjunction with the figure, other features and advantages of the utility model
It will become clearer.
Detailed description of the invention
Fig. 1 is a kind of schematic block circuit diagram of the embodiment for the brightness of display screen regulating system that the utility model is proposed；
Fig. 2 is connection relationship diagram between the boost module in Fig. 1 and resistance configuration module；
Fig. 3 is the first physical circuit schematic diagram of Fig. 2；
Fig. 4 is second of physical circuit schematic diagram of Fig. 2；
Fig. 5 is the third physical circuit schematic diagram of Fig. 2；
Fig. 6 is the 4th kind of physical circuit schematic diagram of Fig. 2；
Fig. 7 is the 5th kind of physical circuit schematic diagram of Fig. 2；
Fig. 8 is the 6th kind of physical circuit schematic diagram of Fig. 2；
Fig. 9 is a kind of control flow chart of embodiment of brightness of display screen adjusting method.
Specific embodiment
Specific embodiment of the present utility model is described in more detail with reference to the accompanying drawing.
The present embodiment can be according to the supply voltage of access is different and voluntarily adjust display screen (such as PM for screen intensity
OLED screen) brightness control system is designed, on the basis of realizing that screen intensity can adaptively be adjusted with ambient light, pass through reduction
The supply voltage of display screen achievees the purpose that improve display screen power consumption.
As shown in Figure 1, the brightness of display screen regulating system of the present embodiment is mainly by photosensitive sensors, controller, boosting mould
The part such as block, resistance configuration module, display screen forms.Wherein, brightness (or environment light of the photosensitive sensors for sense ambient light
The intensity of line), when the brightness of surrounding environment light changes, the inductive signal of photosensitive sensors output can also occur accordingly
Variation.The inductive signal that photosensitive sensors export is sent to controller, such as MCU etc., when controller reads inductive signal
After changing, control boost module changes it and exports to the size of the supply voltage of display screen.Display screen is receiving power supply
Display is lighted after voltage, and the brightness of its each pixel is adjusted according to the variation of supply voltage.
For wrist strap class wearable device, such as Intelligent bracelet, smartwatch etc., the photosensitive sensors can be pacified
On the top surface of watchcase or wrist strap, accurately to perceive the light luminance variation of wearable device place environment.
In the present embodiment, the boost module preferably uses the DC boosting module, such as DC-DC boost chip to be
System circuit design.Direct-current input power supplying is provided for boost module, boosting inverter processing is carried out to input power using boost module,
To generate required supply voltage, it is transmitted to the display screen.For wrist strap class wearable device, the input power can be with
It is provided by the battery in wearable device, that is, cell voltage VBAT is transmitted to the voltage input end VIN of boost module U1, such as Fig. 2
Shown and described by the voltage output end VOUT of boost module U1 output supply voltage VDD.The boost module of the present embodiment
U1 has feedback end FB and ground terminal GND, and first resistor is connected between the feedback end FB and ground terminal GND of boost module U1 and is matched
Module R1 is set, and connects second resistance configuration module R2 between the voltage output end VOUT and feedback end FB of boost module U1,
It is by changing the ratio R 2/R1 of the resistance value of second resistance configuration module and the resistance value of first resistor configuration module, i.e., adjustable to rise
The supply voltage VDD of die block U1 output.
In order to which the supply voltage VDD for enabling boost module U1 to export follows the brightness change of environment light to automatically adjust, this
Embodiment adjusts the resistance value of first resistor configuration module R1 and/or the resistance value of second resistance configuration module R2 using controller
Section.
Specifically, the present embodiment is to the electricity of first resistor configuration module R1 and second in order to change the size of ratio R 2/R1
It hinders configuration module R2 and proposes following six kinds of preferred circuit design schemes.
First scheme, as shown in figure 3, the resistance value of first resistor configuration module R1 is configured to fixed resistance value, that is, can adopt
The first resistor configuration module R1 is designed with one or more fixed resistance R11, and the fixed resistance R11 is connected to liter
Between the feedback end FB and ground terminal GND of die block U1, the ground wire of the pcb board of the ground terminal GND connection wearable device.
The resistance value of second resistance configuration module R2 is configured to adjustable, including at least one fixed resistance R21 and M matches
Setting resistance R22 and M switch element Q22, the M is positive integer.Fixed resistance R21 is connected directly between to the electricity of boost module U1
It presses between output end VOUT and feedback end FB, the switch ways that M configures resistance R22 and M switch element Q22 is corresponded
After connection, then it is connected between the voltage output end VOUT of boost module U1 and feedback end FB.Using controller to the M
A switch element Q22 carries out on-off control, selectively by wherein one or more configuration resistance R22 and fixed resistance R21
It is in parallel, then changes effective resistance value of second resistance configuration module R2.
The present embodiment is illustrated so that M=1, switch element Q22 are PMOS tube as an example.
Fixed resistance R21 is connected directly between the voltage output end VOUT of boost module U1 and feedback end FB, will be matched
It sets resistance R22 to be connected between the drain D of feedback end FB and PMOS tube Q22 of boost module U1, the source S of PMOS tube Q22 connects
The voltage output end VOUT of boost module U1 is met, the grid G of PMOS tube Q22 passes through the electricity of pull-up resistor R6 connection boost module U1
Output end VOUT is pressed, and connects the wherein I/O port IO2 all the way of controller, controller is received and passes through the switching signals of IO2 mouthfuls of output
Hcontrol_2。
When it is high level that controller, which sets the switching signal Hcontrol_2, PMOS tube Q22 ends, at this time second resistance
Effective resistance value of configuration module R2 is the resistance value of fixed resistance R21.So second resistance configuration module and first resistor configure mould
The ratio between resistance value of block R2/R1=R21/R11.
When it is low level that controller, which sets the switching signal Hcontrol_2, PMOS tube Q22 saturation conduction, at this time second
Effective resistance value of resistance configuration module R2 is the resistance value R21//R22 in parallel of fixed resistance R21 with configuration resistance R22.So the
The ratio between the resistance value of two resistance configuration modules and first resistor configuration module R2/R1=(R21//R22)/R11.
As a result, by control PMOS tube Q22 on-off, two kinds of ratio R 2/R1 can be obtained, then can control boost module
U1 exports two kinds of supply voltage VDD, realizes that two-stage is adjusted to the brightness of display screen.
Increase the quantity of configuration resistance and switch element, i.e. M > 1, and the resistance value for configuring resistance is different, utilizes control
Device is independently controlled the on off operating mode of each way switch element, it is possible thereby to obtain 2MKind R2/R1 ratio, then can control
Boost module U1 output 2MKind supply voltage VDD realizes 2 to the brightness of display screenMGrade is adjusted.
Alternative plan, as shown in figure 4, the resistance value of first resistor configuration module R1 is configured to fixed resistance value, that is, can adopt
The first resistor configuration module R1 is designed with one or more fixed resistance R11, and the fixed resistance R11 is connected to liter
Between the feedback end FB and ground terminal GND of die block U1, the ground wire of the pcb board of the ground terminal GND connection wearable device.
The resistance value of second resistance configuration module R2 is configured to it is adjustable, including M resistance value different configuration resistance R21, R22
With M switch element Q21, Q22, the M is the integer greater than 1.By R21, R22 and M switch element Q21 of M configuration resistance,
After the switch ways of Q22 connect one to one, then it is connected to the voltage output end VOUT and feedback end FB of boost module U1
Between.Using controller to described M switch element Q21, Q22 carry out on-off control, with selectively by one of them or it is more
A configuration resistance R21, R22 are connected between the voltage output end VOUT of boost module U1 and feedback end FB, then change second
Effective resistance value of resistance configuration module R2.
The present embodiment is illustrated so that M=2, switch element Q21, Q22 are PMOS tube as an example.
Configuration resistance R21 is connected between the drain D of feedback end FB and PMOS tube Q21 of boost module U1, PMOS tube
The voltage output end VOUT of the source S connection boost module U1 of Q21, the grid G of PMOS tube Q21 are risen by pull-up resistor R5 connection
The voltage output end VOUT of die block U1, and the wherein I/O port IO1 all the way of controller is connected, it is defeated by IO1 mouthfuls to receive controller
Switching signal Hcontrol_1 out.Similarly, configuration resistance R22 is connected to the feedback end FB and PMOS tube of boost module U1
Between the drain D of Q22, the voltage output end VOUT of the source S connection boost module U1 of PMOS tube Q22, the grid of PMOS tube Q22
G passes through the voltage output end VOUT of pull-up resistor R6 connection boost module U1, and connects the other I/O port IO2 all the way of controller,
Receive the switching signal Hcontrol_2 that controller is exported by IO2 mouthfuls.
For double switch signal Hcontrol_1, Hcontrol_2, controller at least sets a wherein path switching signal
Hcontrol_1 or Hcontrol_2 is that low level is then guaranteed with controlling at least all the way PMOS tube Q21 or Q22 saturation conduction
At least one configuration resistance R21 or R22 are connected to the voltage output end of boost module U1 during boost module U1 work
Between VOUT and feedback end FB.It, can be by second resistance configuration module by changing the on off operating mode of two-way PMOS tube Q21, Q22
Effective resistance value of R2 is configured to the resistance value, the resistance value for configuring resistance R22, the parallel connection for configuring resistance R21 and R22 of configuration resistance R21
Resistance value R21//R22.
Three kinds of ratio R 2/R1 can be obtained as a result, can then be controlled boost module U1 and be exported three kinds of supply voltages
VDD realizes that three-level is adjusted to the brightness of display screen.
Increase the quantity of configuration resistance and switch element, i.e. M > 2, and the resistance value for configuring resistance is different, utilizes control
Device is independently controlled the on off operating mode of each way switch element, it is possible thereby to obtain 2M- a kind of R2/R1 ratio, can then control
Boost module U1 output 2 processedM- a kind of supply voltage VDD realizes 2 to the brightness of display screenM- 1 grade of adjusting.
Third program, as shown in figure 5, the resistance value of second resistance configuration module R2 is configured to fixed resistance value, that is, can adopt
The second resistance configuration module R2 is designed with one or more fixed resistance R21, and the fixed resistance R21 is connected to liter
Between the voltage output end VOUT and feedback end FB of die block U1.
The resistance value of first resistor configuration module R1 is configured to adjustable, including at least one fixed resistance R11 and N number of matched
Resistance R12 and N number of switch element Q12 are set, the N is positive integer.Fixed resistance R11 is connected directly between the anti-of boost module U1
It presents between end FB and ground terminal GND, and the ground terminal GND is connected to the ground wire of the pcb board of wearable device.By N number of configuration
After the switch ways of resistance R12 and N number of switch element Q12 connect one to one, then it is connected to the feedback of boost module U1
It holds between FB and ground terminal GND.On-off control is carried out to N number of switch element Q12 using controller, selectively by it
Middle one or more configuration resistance R12 and fixed resistance R11 are in parallel, and then change effective resistance of first resistor configuration module R1
Value.
The present embodiment is illustrated so that N=1, switch element Q12 are NMOS tube as an example.
Fixed resistance R11 is connected directly between the feedback end FB of boost module U1 and ground terminal GND, by NMOS tube
The drain D of Q12 is connected to the feedback end FB of boost module U1, and the source S of NMOS tube Q12 is connected to by configuring resistance R12
The grid G of NMOS tube Q12 is connected to the wherein I/O port IO3 all the way of controller, receives control by the ground terminal GND of boost module U1
The switching signal Lcontrol_1 that device processed is exported by IO3 mouthfuls.
When switching signal Lcontrol_1 described in controller sets N is low level, NMOS tube Q12 cut-off, the first electricity at this time
The effective resistance value for hindering configuration module R1 is the resistance value of fixed resistance R11.So first resistor configuration module and first resistor configure
The ratio between resistance value of module R2/R1=R21/R11.
When it is high level that controller, which sets the switching signal Lcontrol_1, NMOS tube Q12 saturation conduction, at this time first
Effective resistance value of resistance configuration module R1 is the resistance value R11//R12 in parallel of fixed resistance R11 with configuration resistance R12.So the
The ratio between the resistance value of two resistance configuration modules and first resistor configuration module R2/R1=R21/(R11//R12).
As a result, by control NMOS tube Q12 on-off, two kinds of ratio R 2/R1 can be obtained, then can control boost module
U1 exports two kinds of supply voltage VDD, realizes that two-stage is adjusted to the brightness of display screen.
Increase the quantity of configuration resistance and switch element, i.e. N > 1, and the resistance value for configuring resistance is different, utilizes control
Device is independently controlled the on off operating mode of each way switch element, it is possible thereby to obtain 2NKind R2/R1 ratio, then can control
Boost module U1 output 2NKind supply voltage VDD realizes 2 to the brightness of display screenNGrade is adjusted.
Fourth program, as shown in fig. 6, the resistance value of second resistance configuration module R2 is configured to fixed resistance value, that is, can adopt
The second resistance configuration module R2 is designed with one or more fixed resistance R21, and the fixed resistance R21 is connected to liter
Between the voltage output end VOUT and feedback end FB of die block U1.
The resistance value of first resistor configuration module R1 is configured to it is adjustable, including N number of resistance value different configuration resistance R11, R12
It is the integer greater than 1 with N number of switch element Q11, Q12, the N.By N number of configuration resistance R11, R12 and N number of switch element Q11,
After the switch ways of Q12 connect one to one, then it is connected between the feedback end FB of boost module U1 and ground terminal GND,
And the ground terminal GND is connected in wearable device on the ground wire of pcb board.Using controller to N number of switch element
Q11, Q12 carry out on-off control, wherein one or more configurations resistance R11, R12 are selectively connected to boost module U1
Feedback end FB and ground terminal GND between, then change first resistor configuration module R1 effective resistance value.
The present embodiment is illustrated so that N=2, switch element Q11, Q12 are NMOS tube as an example.
The drain D of NMOS tube Q11 is connected to the feedback end FB of boost module U1, by the source S of NMOS tube Q11 by matching
Set the ground terminal GND that resistance R11 is connected to boost module U1, by the grid G of NMOS tube Q11 be connected to controller wherein all the way
I/O port IO4 receives the switching signal Lcontrol_2 that controller is exported by IO1 mouthfuls.Similarly, the drain D of NMOS tube Q12 is connected
It is connected to the feedback end FB of boost module U1, the source S of NMOS tube Q12 is connected to boost module U1's by configuring resistance R12
The grid G of NMOS tube Q12 is connected to the other I/O port IO3 all the way of controller, receives controller and pass through IO3 mouthfuls by ground terminal GND
The switching signal Lcontrol_1 of output.
For double switch signal Lcontrol_1, Lcontrol_2, controller at least sets a wherein path switching signal
Lcontrol_1 or Lcontrol_2 is that high level is then guaranteed with controlling at least all the way NMOS tube Q11 or Q12 saturation conduction
At least one configuration resistance R11 or R12 are connected to the feedback end FB of boost module U1 and connect during boost module U1 work
Between ground terminal GND.It, can having first resistor configuration module R1 by changing the on off operating mode of two-way NMOS tube Q11, Q12
Effect resistance value is configured to the resistance value, the resistance value for configuring resistance R12, the resistance value in parallel for configuring resistance R11 and R12 of configuration resistance R11
R11//R12。
Three kinds of ratio R 2/R1 can be obtained as a result, can then be controlled boost module U1 and be exported three kinds of supply voltages
VDD realizes that three-level is adjusted to the brightness of display screen.
Increase the quantity of configuration resistance and switch element, i.e. N > 2, and the resistance value for configuring resistance is different, utilizes control
Device is independently controlled the on off operating mode of each way switch element, it is possible thereby to obtain 2N- a kind of R2/R1 ratio, can then control
Boost module U1 output 2 processedN- a kind of supply voltage VDD realizes 2 to the brightness of display screenN- 1 grade of adjusting.
5th scheme, as shown in fig. 7, the resistance value of first resistor configuration module R1 is configured to it is adjustable, including at least one
Fixed resistance R11 and N number of configuration resistance R12 and N number of switch element Q12, the N are positive integer.Fixed resistance R11 is direct
It is connected between the feedback end FB of boost module U1 and ground terminal GND, and the ground terminal GND is connected to wearable device
The ground wire of pcb board.After the switch ways of N number of configuration resistance R12 and N number of switch element Q12 are connected one to one, then connect respectively
It connects between the feedback end FB and ground terminal GND of boost module U1.N number of switch element Q12 is led to using controller
Disconnected control then changes first so that selectively wherein one or more configurations resistance R12 and fixed resistance R11 to be in parallel
Effective resistance value of resistance configuration module R1.
The resistance value of second resistance configuration module R2 is also configured to adjustable, including at least one fixed resistance R21 and M
Configuring resistance R22 and M switch element Q22, the M is positive integer.Fixed resistance R21 is connected directly between boost module U1's
Between voltage output end VOUT and feedback end FB, M is configured one a pair of switch ways of resistance R22 and M switch element Q22
After should connecting, then it is connected between the voltage output end VOUT of boost module U1 and feedback end FB.Using controller to institute
It states M switch element Q22 and carries out on-off control, selectively by wherein one or more configuration resistance R22 and fixed resistance
R21 is in parallel, and then changes effective resistance value of second resistance configuration module R2.
It is said for the present embodiment is by M=1, N=1, switch element Q12 are NMOS tube, switch element Q22 is PMOS tube
It is bright.
Fixed resistance R11 is connected directly between the feedback end FB of boost module U1 and ground terminal GND, by NMOS tube
The drain D of Q12 is connected to the feedback end FB of boost module U1, and the source S of NMOS tube Q12 is connected to by configuring resistance R12
The grid G of NMOS tube Q12 is connected to the wherein I/O port IO3 all the way of controller, receives control by the ground terminal GND of boost module U1
The switching signal Lcontrol_1 that device processed is exported by IO3 mouthfuls.
Fixed resistance R21 is connected directly between the voltage output end VOUT of boost module U1 and feedback end FB, will be matched
It sets resistance R22 to be connected between the drain D of feedback end FB and PMOS tube Q22 of boost module U1, the source S of PMOS tube Q22 connects
The voltage output end VOUT of boost module U1 is met, the grid G of PMOS tube Q22 passes through the electricity of pull-up resistor R6 connection boost module U1
Output end VOUT is pressed, and connects the other I/O port IO2 all the way of controller, controller is received and passes through the IO2 mouthfuls of switching signals exported
Hcontrol_2。
The on off operating mode for changing NMOS tube Q12 using controller, can making first resistor configuration module tool, there are two types of equivalent
Resistance value changes the on off operating mode of PMOS tube Q22 using controller, and can making second resistance configuration module tool, there are two types of equivalent resistances
Value.Thus, it is possible to obtain four kinds of ratio R 2/R1, it then can control boost module U1 and export four kinds of supply voltage VDD, to aobvious
The brightness of display screen realizes that level Four is adjusted.
Increase N, M, i.e. N > 1, M > 1, and the resistance value for configuring resistance is different, using controller to each way switch element
On off operating mode be independently controlled, it is possible thereby to obtain 2N×2MKind R2/R1 ratio, it is defeated then to can control boost module U1
Out 2N×2MKind supply voltage VDD realizes 2 to the brightness of display screenN×2MGrade is adjusted.
6th scheme, as shown in figure 8, the resistance value of first resistor configuration module R1 is configured to adjustable, including N number of resistance value is not
Same configuration resistance R11, R12 and N number of switch element Q11, Q12, the N are the integer greater than 1.By N number of configuration resistance R11,
After the switch ways of R12 and N number of switch element Q11, Q12 connect one to one, then it is connected to the feedback of boost module U1
It holds between FB and ground terminal GND, and the ground terminal GND is connected in wearable device on the ground wire of pcb board.Utilize controller
On-off control is carried out to described N number of switch element Q11, Q12, with selectively by wherein one or more configure resistance R11,
R12 is connected between the feedback end FB of boost module U1 and ground terminal GND, then changes the effective of first resistor configuration module R1
Resistance value.
The resistance value of second resistance configuration module R2 is also configured to it is adjustable, including the different configuration resistance R21 of M resistance value,
R22 and M switch element Q21, Q22, the M is the integer greater than 1.By R21, R22 and M switch elements of M configuration resistance
After the switch ways of Q21, Q22 connect one to one, then it is connected to the voltage output end VOUT and feedback of boost module U1
It holds between FB.On-off control is carried out to described M switch element Q21, Q22 using controller, selectively by one of them
Or multiple configuration resistance R21, R22 are connected between the voltage output end VOUT of boost module U1 and feedback end FB, are then changed
Effective resistance value of second resistance configuration module R2.
For the present embodiment is by N=2, M=2, switch element Q11, Q12 are NMOS tube, switch element Q21, Q22 are PMOS tube
It is illustrated.
The drain D of NMOS tube Q11 is connected to the feedback end FB of boost module U1, by the source S of NMOS tube Q11 by matching
Set the ground terminal GND that resistance R11 is connected to boost module U1, by the grid G of NMOS tube Q11 be connected to controller wherein all the way
I/O port IO4 receives the switching signal Lcontrol_2 that controller is exported by IO1 mouthfuls.Similarly, the drain D of NMOS tube Q12 is connected
It is connected to the feedback end FB of boost module U1, the source S of NMOS tube Q12 is connected to boost module U1's by configuring resistance R12
The grid G of NMOS tube Q12 is connected to the other I/O port IO3 all the way of controller, receives controller and pass through IO3 mouthfuls by ground terminal GND
The switching signal Lcontrol_1 of output.
Configuration resistance R21 is connected between the drain D of feedback end FB and PMOS tube Q21 of boost module U1, PMOS tube
The voltage output end VOUT of the source S connection boost module U1 of Q21, the grid G of PMOS tube Q21 are risen by pull-up resistor R5 connection
The voltage output end VOUT of die block U1, and the wherein I/O port IO1 all the way of controller is connected, it is defeated by IO1 mouthfuls to receive controller
Switching signal Hcontrol_1 out.Similarly, configuration resistance R22 is connected to the feedback end FB and PMOS tube of boost module U1
Between the drain D of Q22, the voltage output end VOUT of the source S connection boost module U1 of PMOS tube Q22, the grid of PMOS tube Q22
G passes through the voltage output end VOUT of pull-up resistor R6 connection boost module U1, and connects the other I/O port IO2 all the way of controller,
Receive the switching signal Hcontrol_2 that controller is exported by IO2 mouthfuls.
For double switch signal Lcontrol_1, Lcontrol_2, controller at least sets a wherein path switching signal
Lcontrol_1 or Lcontrol_2 is that high level is then guaranteed with controlling at least all the way NMOS tube Q11 or Q12 saturation conduction
At least one configuration resistance R11 or R12 are connected to the feedback end FB of boost module U1 and connect during boost module U1 work
Between ground terminal GND.It, can having first resistor configuration module R1 by changing the on off operating mode of two-way NMOS tube Q11, Q12
Effect resistance value is configured to three kinds: the resistance in parallel of the resistance value of configuration resistance R11, the resistance value for configuring resistance R12, configuration resistance R11 and R12
Value R11//R12.
For double switch signal Hcontrol_1, Hcontrol_2, controller at least sets a wherein path switching signal
Hcontrol_1 or Hcontrol_2 is that low level is then guaranteed with controlling at least all the way PMOS tube Q21 or Q22 saturation conduction
At least one configuration resistance R21 or R22 are connected to the voltage output end of boost module U1 during boost module U1 work
Between VOUT and feedback end FB.It, can be by second resistance configuration module by changing the on off operating mode of two-way PMOS tube Q21, Q22
Effective resistance value of R2 is configured to three kinds: the resistance value of configuration resistance R21, configures resistance R21 and R22 at the resistance value for configuring resistance R22
Resistance value R21//R22 in parallel.
Nine kinds of R2/R1 ratios can be obtained as a result, can then be controlled boost module U1 and be exported nine kinds of supply voltages
VDD realizes nine grades of adjustings to the brightness of display screen.
Increase N, M, i.e. N > 2, M > 2, and the resistance value for configuring resistance is different, using controller to each way switch element
On off operating mode be independently controlled, it is possible thereby to obtain (2N- 1) × (2M- 1) ratio R 2/R1 is planted, then can control boosting
Module U1 output (2N- 1) × (2M- 1) supply voltage VDD is planted, (2 are realized to the brightness of display screenN- 1) × (2M- 1) grade is adjusted.
Certainly, above-mentioned switch element can also carry out system circuit design using other switching tubes in addition to metal-oxide-semiconductor, this
Embodiment is not limited in the above citing.
For above system circuit design, multiple luminance thresholds can be arranged in the present embodiment in the controller, and then are formed
Multiple brightness sections.Controller can determine the brightness of ambient enviroment according to the inductive signal that photosensitive sensors sense output,
Then judge the brightness section where current ambient brightness, corresponding switching signal generated according to locating brightness section,
Effective resistance value of first resistor configuration module R1 and/or second resistance configuration module R2 is adjusted, it is defeated then to adjust boost module U1
Supply voltage VDD out, to control the variation automatic adjusument that the brightness of display screen follows ambient brightness.
For PM OLED screen, it is contemplated that the brightness of its pixel is raised with the increase of received supply voltage
Characteristic, the present embodiment design controller and are detecting ambient brightness raising and be transitioned into higher leveled brightness from present intensity section
When section, the resistance value of the second resistance configuration module R2 and first resistor configuration module R1 are adjusted, makes the ratio R 2/R1 of the two
Increase, to improve the supply voltage VDD of boost module U1 output, controls display screen blast.Conversely, when controller detects environment
Brightness reduces and when being transitioned into the brightness section of low level-one from present intensity section, adjust the second resistance configuration module R2 and
The resistance value of first resistor configuration module R1, reduces the ratio R 2/R1 of the two, then reduces the power supply electricity of boost module U1 output
VDD is pressed, control display screen is dimmed.If controller detects that ambient brightness changes, but is not out current brightness section,
Then controller maintains the resistance value of the second resistance configuration module R2 and first resistor configuration module R1 constant, controls boost module
U1 persistently exports current supply voltage VDD, keeps the brightness of display screen constant.
Below for two luminance thresholds are set in the controller, the display screen of the present embodiment is specifically described in conjunction with Fig. 9
Brightness adjusting method.
Two luminance thresholds, respectively high brightness thresholding H and low-light level thresholding L are set in the controller, it is possible thereby to shape
At three brightness sections:<L, L ~ H,>H.Select suitable first resistor configuration module R1 and second resistance configuration module R2, example
It can choose circuit design as illustrated in fig. 4 or 6, such as to provide three kinds of ratio R 2/R1 for switching.It is of course also possible to by
One resistance configuration module R1 and second resistance configuration module R2 are configured to can provide the circuit design more than three kinds of ratio R 2/R1,
Such as Fig. 7, circuit design shown in Fig. 8 etc., it equally can satisfy design requirement.
Display screen is controlled light after, controller first according to brightness section L ~ H configure first resistor configuration module R1 and
Effective resistance value of second resistance configuration module R2 controls display screen bright display in.
Then, the light luminance of controller starting photosensitive sensors detection wearable device local environment, and generate corresponding
Inductive signal is sent to controller.
Controller according to the inductive signal build environment brightness value I received, and with preset high brightness thresholding H and low bright
Degree thresholding L is compared:
If I > H, effective resistance value of first resistor configuration module R1 and/or second resistance configuration module R2 are adjusted, makes to compare
Value R2/R1 is increased；The supply voltage VDD that the raising of ratio R 2/R1 causes boost module U1 to export increases, and then controls display screen
Brightness increase；
If L≤I≤H, keep the existing resistance value of first resistor configuration module R1 and second resistance configuration module R2 constant,
It keeps the supply voltage VDD of boost module U1 output constant, maintains the existing brightness of display screen；
If I < L, effective resistance value of first resistor configuration module R1 and/or second resistance configuration module R2 are adjusted, makes to compare
Value R2/R1 reduces；The supply voltage VDD that the reduction of ratio R 2/R1 causes boost module U1 to export reduces, and then controls display screen
Brightness reduce.
Hereby it is achieved that brightness of display screen follows the purpose of design of the variation of ambient brightness and automatic adjusument, not only make
Obtaining user can feel that screen intensity is softer, reduce the stimulation to eyes of user, and can significantly reduce display
The power consumption of screen plays the technical effect for improving Overall Power Consumption.
Certainly, the above description is not intended to limit the present invention, and the utility model is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the utility model,
It should also belong to the protection scope of the utility model.
Claims (10)
1. a kind of brightness of display screen regulating system characterized by comprising
Photosensitive sensors incude ambient brightness, and generate corresponding inductive signal；
Boost module, receive input power, and to input power carry out boosting inverter after, pass through its voltage output end output supply
Piezoelectric voltage；The boost module further includes feedback end and ground terminal, and the first electricity is connected between the feedback end and ground terminal
Configuration module is hindered, second resistance configuration module, the boost module root are connected between the voltage output end and feedback end
According to the power supply electricity of its output of the ratio variation adjustment of resistance value of the resistance value and first resistor configuration module of second resistance configuration module
Pressure；
Controller receives the inductive signal of the photosensitive sensors output, adjusts the second resistance according to ambient brightness and match
The resistance value for setting module and/or first resistor configuration module, the supply voltage for exporting boost module follow the variation of ambient brightness
Automatic adjustment；
Display screen receives the supply voltage, according to the brightness of the variation adjustment display screen of supply voltage.
2. brightness of display screen regulating system according to claim 1, which is characterized in that
The resistance value of the first resistor configuration module is fixed, including at least one fixed resistance, and the fixed resistance is connected to institute
It states between the feedback end of boost module and ground terminal；
The resistance value of the second resistance configuration module is adjustable, including M configuration resistance and M switch element, and the M is greater than 1
Integer；After the switch ways of the M configuration resistance and M switch element connect one to one, it is connected to the liter
Between the voltage output end and feedback end of die block, the switch element is under the control for the switching signal that the controller exports
On-off, to change effective resistance value of the second resistance configuration module.
3. brightness of display screen regulating system according to claim 1, which is characterized in that
The resistance value of the first resistor configuration module is fixed, including at least one fixed resistance, and the fixed resistance is connected to institute
It states between the feedback end of boost module and ground terminal；
The resistance value of the second resistance configuration module is adjustable, including at least one fixed resistance, M configuration resistance and M switch
Element, the M are positive integer；The fixed resistance be connected directly between the boost module voltage output end and feedback end it
Between；After the switch ways of the M configuration resistance and M switch element connect one to one, it is connected to the boosting mould
Between the voltage output end and feedback end of block；The switch element leads under the control for the switching signal that the controller exports
It is disconnected, to change effective resistance value of the second resistance configuration module.
4. brightness of display screen regulating system according to claim 1, which is characterized in that
The resistance value of the first resistor configuration module is adjustable, including N number of configuration resistance and N number of switch element, and the N is greater than 1
Integer；After the switch ways of N number of configuration resistance and N number of switch element connect one to one, it is connected to the liter
Between the feedback end and ground terminal of die block, the switch element leads under the control for the switching signal that the controller exports
It is disconnected, to change effective resistance value of the first resistor configuration module；
The resistance value of the second resistance configuration module is fixed, including at least one fixed resistance, and the fixed resistance is connected to institute
It states between the voltage output end of boost module and feedback end.
5. brightness of display screen regulating system according to claim 1, which is characterized in that
The resistance value of the first resistor configuration module is adjustable, including at least one fixed resistance, N number of configuration resistance and N number of switch
Element, the N are positive integer；The fixed resistance is connected directly between the feedback end and ground terminal of the boost module；Institute
State it is N number of configuration resistance and N number of switch element switch ways connect one to one after, be connected to the anti-of the boost module
It presents between end and ground terminal；Switch element on-off under the control for the switching signal that the controller exports, to change
State effective resistance value of first resistor configuration module；
The resistance value of the second resistance configuration module is fixed, including at least one fixed resistance, and the fixed resistance is connected to institute
It states between the voltage output end of boost module and feedback end.
6. brightness of display screen regulating system according to claim 1, which is characterized in that
The resistance value of the first resistor configuration module is adjustable, including N number of configuration resistance and N number of switch element, and the N is greater than 1
Integer；After the switch ways of N number of configuration resistance and N number of switch element connect one to one, it is connected to the liter
Between the feedback end and ground terminal of die block, the switch element leads under the control for the switching signal that the controller exports
It is disconnected, to change effective resistance value of the first resistor configuration module；
The resistance value of the second resistance configuration module is adjustable, including M configuration resistance and M switch element, and the M is greater than 1
Integer；After the switch ways of the M configuration resistance and M switch element connect one to one, it is connected to the liter
Between the voltage output end and feedback end of die block, the switch element is under the control for the switching signal that the controller exports
On-off, to change effective resistance value of the second resistance configuration module.
7. brightness of display screen regulating system according to claim 1, which is characterized in that
The resistance value of the first resistor configuration module is adjustable, including at least one fixed resistance, N number of configuration resistance and N number of switch
Element, the N are positive integer；The fixed resistance is connected directly between the feedback end and ground terminal of the boost module；Institute
State it is N number of configuration resistance and N number of switch element switch ways connect one to one after, be connected to the anti-of the boost module
It presents between end and ground terminal；Switch element on-off under the control for the switching signal that the controller exports, to change
State effective resistance value of first resistor configuration module；
The resistance value of the second resistance configuration module is adjustable, including at least one fixed resistance, M configuration resistance and M switch
Element, the M are positive integer；The fixed resistance be connected directly between the boost module voltage output end and feedback end it
Between；After the switch ways of the M configuration resistance and M switch element connect one to one, it is connected to the boosting mould
Between the voltage output end and feedback end of block；The switch element leads under the control for the switching signal that the controller exports
It is disconnected, to change effective resistance value of the second resistance configuration module.
8. brightness of display screen regulating system according to any one of claims 4 to 7, which is characterized in that first electricity
Hindering the switch element in configuration module is NMOS tube, and the grid of the NMOS tube connects the controller, and the drain electrode of NMOS tube connects
The feedback end of the boost module is connect, the source electrode of NMOS tube connects the liter by the configuration resistance in first resistor configuration module
The ground terminal of die block, the ground terminal connect ground wire.
9. the brightness of display screen regulating system according to any one of claim 2,3,6,7, which is characterized in that described second
Switch element in resistance configuration module is PMOS tube, and the grid of the PMOS tube connects the controller, and passes through pull-up electricity
Resistance connects the voltage output end of the boost module, and the source electrode of PMOS tube connects the voltage output end of the boost module, PMOS
The drain electrode of pipe connects the feedback end of the boost module by the configuration resistance in second resistance configuration module.
10. a kind of wearable device, which is characterized in that be provided with brightness of display screen tune as claimed in any one of claims 1-9 wherein
Section system.
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| CN201822001091.7U CN209029084U (en) | 2018-11-30 | 2018-11-30 | A kind of brightness of display screen regulating system and wearable device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256091A (en) * | 2018-11-30 | 2019-01-22 | 潍坊歌尔电子有限公司 | A kind of brightness of display screen regulating system and wearable device |
| CN109256091B (en) * | 2018-11-30 | 2024-07-12 | 潍坊歌尔电子有限公司 | Display screen brightness adjusting system and wearing equipment |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256091A (en) * | 2018-11-30 | 2019-01-22 | 潍坊歌尔电子有限公司 | A kind of brightness of display screen regulating system and wearable device |
| CN109256091B (en) * | 2018-11-30 | 2024-07-12 | 潍坊歌尔电子有限公司 | Display screen brightness adjusting system and wearing equipment |
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