CN109342797A - A kind of backlight power sense circuit, terminal and backlight source detection method - Google Patents
A kind of backlight power sense circuit, terminal and backlight source detection method Download PDFInfo
- Publication number
- CN109342797A CN109342797A CN201810975679.4A CN201810975679A CN109342797A CN 109342797 A CN109342797 A CN 109342797A CN 201810975679 A CN201810975679 A CN 201810975679A CN 109342797 A CN109342797 A CN 109342797A
- Authority
- CN
- China
- Prior art keywords
- backlight
- current integration
- control signal
- integration values
- detected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
Abstract
The embodiment of the invention discloses a kind of backlight power sense circuit, terminal and backlight source detection methods, are applied to field of communication technology, can solve the problems, such as that the prior art is unable to judge accurately whether backlight in display screen breaks down.The comparison module for including: integration module and being connect with integration module；Integration module, for receiving first voltage signal, and according to the first current integration values of first voltage signal acquisition, and the first current integration values are exported to comparison module, the voltage value of first voltage signal is identical as the operating voltage of backlight to be detected, first current integration values are backlight to be detected in preset duration, the integrated value of the electric current of the voltage value based on first voltage signal；Comparison module for receiving the first current integration values, and compares the first current integration values and the second current integration values, and is used to indicate the target control signal whether backlight to be detected breaks down according to comparison result output.The embodiment of the present invention is applied in the scene of backlight detection.
Description
Technical field
The present embodiments relate to field of communication technology more particularly to a kind of backlight power sense circuits, terminal and backlight
Detection method.
Background technique
It is universal with terminal technology, terminal using more and more extensive.In general, the display screen of terminal is liquid crystal display
Shield, is provided with one or more backlight in the liquid crystal module in liquid crystal display, the illumination effect of backlight will affect liquid crystal
The display effect of mould group.
Currently, during user's using terminal, it, should if the backlight in the display screen of terminal breaks down
Display screen is it is possible that show abnormal problem.User can judge display screen by observing the display state of display screen at this time
It breaks down, but possibly can not judge whether the backlight in display screen occurs by observing the display state of display screen
Failure, it is thus possible to can not judge whether backlight breaks down in display screen.
Summary of the invention
The embodiment of the present invention provides a kind of backlight power sense circuit, terminal and backlight source detection method, existing to solve
The problem of whether backlight breaks down in display screen can not be judged present in technology.
In order to solve the above-mentioned technical problem, the embodiments of the present invention are implemented as follows:
In a first aspect, provide a kind of backlight power sense circuit, the backlight power sense circuit include: integration module and with integral
The comparison module of module connection；
Integration module, for receiving first voltage signal, and according to the first current integration values of first voltage signal acquisition, with
And the first current integration values are exported to comparison module, wherein the work of the voltage value of first voltage signal and backlight to be detected
Voltage is identical, and the first current integration values are backlight to be detected in preset duration, the voltage value based on first voltage signal
The integrated value of electric current；
Comparison module for receiving the first current integration values, and compares the first current integration values and the second current integration values,
And target control signal is exported according to comparison result, target control signal is used to indicate whether backlight to be detected event occurs
Barrier.
Second aspect provides a kind of display module, which includes: at least one backlight as described in relation to the first aspect
Power sense circuit.
The third aspect provides a kind of terminal, which includes: at least one backlight detection electricity as described in relation to the first aspect
Road.
Fourth aspect provides a kind of terminal, which includes the first display screen, second display screen and control module；It is described
First display screen and the second display screen include: at least one backlight power sense circuit as described in relation to the first aspect, each
Backlight power sense circuit is connect with control module；Control module, for receiving at least one of first display screen back
In the case where the first control signal of light source detection circuit output, by the changing interface shown in the first display screen to the second display
It is shown in screen, the backlight that first control signal is used to indicate the backlight power sense circuit detection of output first control signal occurs
Failure.
5th aspect, provides a kind of backlight source detection method, this method comprises: receiving first voltage signal, and according to the
One voltage signal obtains the first current integration values；The operating voltage phase of the voltage value of first voltage signal and backlight to be detected
Together, the first current integration values are backlight to be detected in preset duration, the integrated value of the electric current based on voltage value；Compare first
Current integration values and the second current integration values, and target control signal is exported according to comparison result；Target control signal is used for
Indicate whether backlight to be detected breaks down.
In embodiments of the present invention, a kind of backlight power sense circuit, terminal and backlight source detection method are provided, comprising: product
Sub-module and the comparison module being connect with integration module；Integration module, for receiving first voltage signal, and according to first voltage
The first current integration values of signal acquisition, and the first current integration values are exported to comparison module, wherein the electricity of first voltage signal
Pressure value is identical as the operating voltage of backlight to be detected, and the first current integration values are backlight to be detected in preset duration, base
In the integrated value of the electric current of the voltage value of first voltage signal, the second current integration values are backlight to be detected in normal work
In the case of, in preset duration, the integrated value of the electric current of the operating voltage based on the backlight to be detected；Comparison module is used for
The first current integration values are received, and compare the first current integration values and the second current integration values, and export according to comparison result
Target control signal, target control signal are used to indicate whether backlight to be detected breaks down.With this solution, due to backlight
(backlight i.e. to be detected is based on first voltage signal in preset duration to available first current integration values of power sense circuit
Voltage value electric current integrated value), and compare the first current integration values and the second current integration values, and can be according to comparing knot
Fruit output is used to indicate the target control signal whether backlight to be detected breaks down, therefore can be through the embodiment of the present invention
The target control signal of the backlight power sense circuit output of middle offer, judges whether backlight breaks down in display screen.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram one of backlight power sense circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic diagram two of backlight power sense circuit provided in an embodiment of the present invention；
Fig. 3 is a kind of schematic diagram three of backlight power sense circuit provided in an embodiment of the present invention；
Fig. 4 is a kind of schematic diagram four of backlight power sense circuit provided in an embodiment of the present invention；
Fig. 5 is a kind of schematic diagram five of backlight power sense circuit provided in an embodiment of the present invention；
Fig. 6 is a kind of schematic diagram six of backlight power sense circuit provided in an embodiment of the present invention；
Fig. 7 is a kind of schematic diagram of backlight source detection method provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Term " first " and " second " in description and claims of this specification etc. are for distinguishing different pairs
As, rather than it is used for the particular order of description object.For example, the first current integration values, second current integration values etc. are for area
Not different current integration values, rather than the particular order for describing current integration values.
" connection " in description and claims of this specification is to be electrically connected.
It should be noted that in the embodiment of the present invention, " illustrative " or " such as " etc. words make example, example for indicating
Card or explanation.Be described as in the embodiment of the present invention " illustrative " or " such as " any embodiment or design scheme do not answer
It is interpreted than other embodiments or design scheme more preferably or more advantage.Specifically, " illustrative " or " example are used
Such as " word is intended to that related notion is presented in specific ways.
As shown in Figure 1, the embodiment of the present invention provides a kind of backlight power sense circuit, which includes: product
Sub-module 11 and the comparison module 12 being connect with integration module 11.
Integration module 11 (is denoted as V for receiving first voltage signal in Fig. 1r), and according to first voltage signal acquisition
One current integration values, and export the first current integration values to comparison module 12 and (be denoted as V in Fig. 1out1)。
Wherein, the voltage value of first voltage signal is identical as the operating voltage of backlight to be detected, the first current integration values
It is backlight to be detected in preset duration, the integrated value of the electric current of the voltage value based on first voltage signal；
Comparison module 12 for receiving the first current integration values, and compares the first current integration values and the second current integration
Value, and target control signal is exported according to comparison result and (is denoted as V in Fig. 1c), the target control signal be used to indicate it is described to
Whether detection backlight breaks down.
Optionally, in the embodiment of the present invention, above-mentioned backlight to be detected can be the backlight all the way in display screen.
Optionally, the first above-mentioned current integration values can be backlight to be detected in preset duration, based on the first electricity
Press the integrated value of the electric current of the voltage value of signal.
Optionally, in the embodiment of the present invention, above-mentioned second current integration values can work normally for backlight to be detected
In the case where, in preset duration, the integrated value of the electric current of the operating voltage based on the backlight to be detected.
The embodiment of the present invention provides a kind of backlight power sense circuit, the backlight power sense circuit include: integration module and with
The comparison module of integration module connection；Integration module, for receiving first voltage signal, and according to first voltage signal acquisition
One current integration values, and to comparison module export the first current integration values, wherein the voltage value of first voltage signal with it is to be checked
The operating voltage for surveying backlight is identical, and the first current integration values are backlight to be detected in preset duration, is based on first voltage
The integrated value of the electric current of the voltage value of signal, the second current integration values are backlight to be detected in the case where normal work,
In preset duration, the integrated value of the electric current of the operating voltage based on the backlight to be detected；Comparison module, for receiving the first electricity
Integrated value is flowed, and compares the first current integration values and the second current integration values, and target control letter is exported according to comparison result
Number, target control signal is used to indicate whether backlight to be detected breaks down.With this solution, due to backlight power sense circuit
Available first current integration values (backlight i.e. to be detected in preset duration, the voltage value based on first voltage signal
The integrated value of electric current), and compare the first current integration values and the second current integration values, and can export and be used for according to comparison result
Indicate the target control signal whether backlight to be detected breaks down, thus can through the embodiment of the present invention in the back that provides
The target control signal of light source detection circuit output, judges whether backlight breaks down in display screen.
Optionally, above-mentioned target control signal includes first control signal and second control signal, and first control signal is used
In indicating backlight failure to be detected, it is without failure that second control signal is used to indicate backlight to be detected.
Above-mentioned comparison module, specifically for being greater than or equal in the difference of the first current integration values and the second current integration values
In the case where first threshold, first control signal is exported；Alternatively, in the difference of the first current integration values and the second current integration values
In the case where first threshold, second control signal is exported.
Optionally, in conjunction with Fig. 1, as shown in Figure 2 or Figure 3, above-mentioned integration module 11 includes: first resistor 111, second resistance
112,3rd resistor 113, backlight to be detected 114, first switch 115, second switch 116, third switch 117, first capacitor
118 and operational amplifier 119.
In backlight power sense circuit provided in an embodiment of the present invention, backlight to be detected can connect with first resistor, should
Backlight to be detected can connect between the first end of first resistor and the first input end of operational amplifier, alternatively, should be to
Detection backlight can connect between the second end of first resistor and the first end of second resistance.
In backlight power sense circuit shown in Fig. 2, backlight 114 to be detected is connected to the first end of first resistor 111
Between 111a and the first input end 119a of operational amplifier 119, the second end 111b of first resistor 111 and the second resistance
112 first end 112a connection.
In backlight power sense circuit shown in Fig. 3, backlight 114 to be detected is connected to the second end of first resistor 111
Between 111b and the first end 112a of second resistance 112, the of the first end 111a of first resistor 111 and operational amplifier 119
One input terminal 119a connection.
Wherein, in Fig. 2 and Fig. 3, the second end 112b of second resistance 112 and the first end 115a difference of first switch 115
It is connect with the second input terminal 119b of operational amplifier 119, the of the second end 115b of first switch 115 and 3rd resistor 113
One end 113a is connect with the first end 118a of first capacitor 118 respectively, and the second end 113b and third of 3rd resistor 113 are switched
The second end 118b of 117 first end 117a connection, the second end 117b of third switch 117 and first capacitor 118 is respectively with
The first end 116a connection of two switches 116, the second end 116b of second switch 116 and the output end 119c of operational amplifier 119
Connection, the output end 119c of operational amplifier 119 are connect with comparison module 12.
It should be noted that the voltage of node a is V in Fig. 2 and Fig. 3r+, the voltage of node b is Vr-, the voltage of node a
Difference with the voltage of node b is first voltage signal VrVoltage value.
In the embodiment of the present invention, integration module is divided into two cyclings, respectively integration period and discharge cycle.This hair
Integration module exports the first current integration to comparison module in integration period in the backlight power sense circuit provided in bright embodiment
Value, not to comparison module output signal in discharge cycle, comparison module does not also export target control signal.
Optionally, integration module exports the first current integration values to comparison module in integration period, in discharge cycle not
It can be worked in integration period by controlling comparison module to comparison module output signal, to receive the of integration module transmission
One current integration values, control comparison module do not work in discharge cycle, to not receive the first electricity of integration module transmission
Flow integrated value.
In conjunction with Fig. 2 or Fig. 3, backlight power sense circuit provided in an embodiment of the present invention is interior in integration period (being denoted as time T),
First switch 115 and second switch 116 are closed, and third switch 117 disconnects, this is the current sample product to backlight to be detected
Point, obtain the current integration values in time t.It is assumed that the voltage of node a is expressed as Vr+, the voltage of node b is expressed as Vr-, node
The voltage of C is expressed as Vi, the voltage of the first input end 119a of operational amplifier 119 is expressed as V+, the of operational amplifier 119
The voltage of two input terminal 119b is expressed as V-, the voltage of capacitor is expressed as Vc, the electric current of capacitor is expressed as ic, second resistance 112
Resistance is expressed as R, and the resistance of backlight to be detected is expressed as Rr, the electric current of backlight to be detected is expressed as Ir, operational amplifier
119 output end 119c voltage (namely first electricityStream integrated value) it is expressed as Vout1。
In Fig. 2 or Fig. 3, Vi=Vr-, V+=V-=Vr+；
Wherein:
The electric current of backlight to be detected
Formula three is substituted into formula two, formula three can deform are as follows:
Formula four is substituted into formula 1, it is availableBacklight to be detected is thus obtained
The integral of the electric current in source.
In conjunction with Fig. 2 or Fig. 3, backlight power sense circuit first switch 115 in discharge cycle provided in an embodiment of the present invention
It is disconnected with second switch 116, third closes the switch, and first capacitor is discharged at this time, enters next product to restore the state of initial value
Divide cycling.
Optionally, in conjunction with Fig. 2, as shown in figure 4, first switch 115 is the first transistor T1, second switch 116 is second
Simplified pipe T2, third transistor T3 are third transistor T3.
Wherein, the source electrode of the first transistor T1 is the first end 115a of first switch 115, and the drain electrode of the first transistor T1 is
The source electrode of the second end 115b of first switch 115, second transistor T2 are the first end 116a of second switch 116, the second crystal
The drain electrode of pipe T2 is the second end 116b of second switch 116, and the source electrode of third transistor T3 is the first end of third switch 117
The drain electrode of 117a, third transistor T3 are the second end 117b of third switch 117, pass through the grid of the first transistor T1, second
The grid of transistor T2 and the grid incoming level of third transistor T3 control signal.
Optionally, the transistor in the embodiment of the present invention can be Metal-Oxide Semiconductor field effect transistor, usually
It can be referred to as metal-oxide-semiconductor.
Usual metal-oxide-semiconductor can be divided into two class of P metal-oxide-semiconductor and N-type metal-oxide-semiconductor again.Optionally, in the first transistor T1, second
When transistor T2 and third transistor T3 are metal-oxide-semiconductor, the first transistor and second transistor can be the MOS of same type
Pipe, and third transistor can be another type of metal-oxide-semiconductor (will be described in detail in conjunction with attached drawing 4 in following example),
The grid and third transistor in the grid of the first transistor T1, second transistor T2 can be passed through in this way in the embodiment of the present invention
The grid of T3 inputs identical level signal, realizes the backlight power sense circuit.So as to reduce the type of input signal, letter
Change circuit structure.
Optionally, the first transistor T1 in Fig. 4 and second transistor T2 can be N-type metal-oxide-semiconductor, and third transistor T3 can
Think p-type metal-oxide-semiconductor.In above-mentioned integration period, the grid of the first transistor T1, the grid of second transistor T2 and third crystal
The equal input high level signal of the grid of pipe T3, at this time the first transistor T1 and second transistor T2 conducting, third transistor T3 are cut
Only.In above-mentioned discharge cycle, the grid of the grid of the first transistor T1, the grid of second transistor T2 and third transistor T3
Equal input low level signal, at this time the first transistor T1 and second transistor T2 cut-off, third transistor T3 conducting.
Optionally, the first transistor T1 in Fig. 4 and second transistor T2 can be p-type metal-oxide-semiconductor, and third transistor T3 can
Think N-type metal-oxide-semiconductor.In above-mentioned integration period, the grid of the first transistor T1, the grid of second transistor T2 and third crystal
The equal input low level signal of the grid of pipe T3, at this time the first transistor T1 and second transistor T2 conducting, third transistor T3 are cut
Only.In above-mentioned discharge cycle, the grid of the grid of the first transistor T1, the grid of second transistor T2 and third transistor T3
Equal input high level signal, at this time the first transistor T1 and second transistor T2 cut-off, third transistor T3 conducting.
Optionally, the above-mentioned comparison module in the embodiment of the present invention can be hysteresis loop comparator.
Optionally, in conjunction with Fig. 4, as shown in figure 5, the hysteresis loop comparator includes: comparing unit 121, the 4th resistance 122,
Five resistance 123, the 6th resistance 124 and the 7th resistance 125.
Wherein, the first end 122a of the 4th resistance 122 is connect with the output end 119c of operational amplifier 119, the 4th resistance
122 second end 122b is connect with the first input end 121a of the first end 123a of the 5th resistance 123 and comparing unit 121, the
The second end 123b of five resistance 123 is connect with the output end 121c of comparing unit 121, and the first end 124a of the 6th resistance 124 is defeated
Enter the second current integration values and (is denoted as V in Fig. 5out2), the first of the second end 124b of the 6th resistance 124 and the 7th resistance 125
End 125a is connected with the second input terminal 121b of comparing unit 121, the second end 125b ground connection of the 7th resistance 125.
Optionally, in conjunction with Fig. 5, as shown in fig. 6, the backlight power sense circuit further includes the 8th resistance 126, the 8th resistance
126 first end 126a is connect with the first input end 119a of operational amplifier 119, and the second end 126b of the 8th resistance 126 connects
Ground.
The embodiment of the present invention provides a kind of display module, which may include at least one as in above-described embodiment
Shown in backlight power sense circuit.
In general, may include having multichannel backlight in display module, it can be in every backlight all the way in display module
One backlight power sense circuit as shown in above-described embodiment is set.
The embodiment of the present invention provides a kind of display module, includes backlight power sense circuit, the backlight in the display module
Detection circuit includes: integration module and the comparison module that connect with integration module；Integration module, for receiving first voltage letter
Number, and the first current integration values are exported according to the first current integration values of first voltage signal acquisition, and to comparison module,
In, the voltage value of first voltage signal is identical as the operating voltage of backlight to be detected, and the first current integration values are back to be detected
Light source is in preset duration, the integrated value of the electric current of the voltage value based on first voltage signal, and the second current integration values are to be checked
Backlight is surveyed in the case where normal work, in preset duration, the electric current of the operating voltage based on the backlight to be detected
Integrated value；Comparison module for receiving the first current integration values, and compares the first current integration values and the second current integration values,
And target control signal is exported according to comparison result, target control signal is used to indicate whether backlight to be detected event occurs
Barrier.With this solution, since (backlight i.e. to be detected is when default for available first current integration values of backlight power sense circuit
In length, the integrated value of the electric current of the voltage value based on first voltage signal), and compare the first current integration values and the second electric current product
Score value, and the target control signal for being used to indicate backlight to be detected and whether breaking down can be exported according to comparison result, because
This can through the embodiment of the present invention in provide backlight power sense circuit output target control signal, judge to carry on the back in display screen
Whether light source breaks down.
Optionally, the display module in the embodiment of the present invention can be liquid crystal display die set.
The embodiment of the present invention provides a kind of terminal, which may include at least one back as shown in above-described embodiment
Light source detection circuit.
It can be setting one in every backlight all the way in terminal in general, may include having multichannel backlight in terminal
The backlight power sense circuit as shown in above-described embodiment.
Terminal in the embodiment of the present invention can be mobile terminal, or immobile terminal.Mobile terminal can be
Mobile phone, tablet computer, laptop, palm PC, car-mounted terminal, wearable device, Ultra-Mobile PC
(ultra-mobile personal computer, UMPC), net book or personal digital assistant (personal digital
Assistant, PDA) etc.；Immobile terminal can be personal computer (personal computer, PC), television set
(television, TV), automatic teller machine or self-service machine etc.；The embodiment of the present invention is not especially limited.
The embodiment of the present invention provides a kind of terminal, includes backlight power sense circuit, the backlight power sense circuit in the terminal
The comparison module for including: integration module and being connect with integration module；Integration module, for receiving first voltage signal, and according to
The first current integration values of first voltage signal acquisition, and the first current integration values are exported to comparison module, wherein first voltage
The voltage value of signal is identical as the operating voltage of backlight to be detected, and the first current integration values are backlight to be detected when default
In length, the integrated value of the electric current of the voltage value based on first voltage signal, the second current integration values are backlight to be detected just
Often in the case where work, in preset duration, the integrated value of the electric current of the operating voltage based on the backlight to be detected；Compare mould
Block for receiving the first current integration values, and compares the first current integration values and the second current integration values, and ties according to comparing
Fruit exports target control signal, and target control signal is used to indicate whether backlight to be detected breaks down.With this solution, by
In available first current integration values of backlight power sense circuit, (backlight i.e. to be detected is electric based on first in preset duration
Press the integrated value of the electric current of the voltage value of signal), and compare the first current integration values and the second current integration values, and can basis
Comparison result output is used to indicate the target control signal whether backlight to be detected breaks down, therefore can be through the invention
The target control signal of the backlight power sense circuit output provided in embodiment judges whether backlight occurs event in display screen
Barrier.
The embodiment of the present invention also provides a kind of terminal, which includes the first display screen, second display screen and control module；
First display screen and second display screen include: backlight power sense circuit shown at least one above-described embodiment, each back
Light source detection circuit is connect with control module.
Wherein, control module, for receiving at least one backlight power sense circuit output in the first display screen
In the case where first control signal, the changing interface shown in the first display screen is shown into second display screen, the first control
The backlight that signal is used to indicate the backlight power sense circuit detection of output first control signal breaks down.
The embodiment of the present invention provides a kind of terminal, and including in the terminal includes the first display screen, second display screen and control
Module, the first display screen and second display screen include: backlight power sense circuit shown at least one above-described embodiment, often
A backlight power sense circuit is connect with control module.Control module in the terminal can be in receiving the first display screen
In the case where the first control signal of at least one backlight power sense circuit output, the changing interface that will be shown in the first display screen
It is shown into second display screen, first control signal is used to indicate the backlight power sense circuit detection of output first control signal
Backlight breaks down.So can be in the case where the first display screen break down, the interface that will be shown in the first display screen
It switches in second display screen and shows, so as to improve the flexibility of double-sided screen terminal display interface.
Optionally, the control module is also used to receiving at least one backlight power sense circuit in the first display screen
In the case where the first control signal of output, controlling terminal exports prompt information, and prompt information is for prompting in the first display screen
Backlight break down.
Control module in the terminal is receiving at least one backlight power sense circuit output in the first display screen
In the case where first control signal, prompt information can be exported with controlling terminal, prompt information is for prompting in the first display screen
Backlight break down.To which user can know that the backlight in the first display screen breaks down by prompt information.
The embodiment of the present invention also provides a kind of backlight source detection method, backlight source detection method provided in an embodiment of the present invention
Executing subject can be above-mentioned terminal (including mobile terminal and immobile terminal), or can be realized in the terminal
The functional module and/or functional entity of the backlight source detection method can specifically determine, the present invention according to actual use demand
Embodiment is not construed as limiting.Below by taking terminal as an example, backlight source detection method provided in an embodiment of the present invention is carried out illustrative
Explanation.
As shown in fig. 7, backlight source detection method provided in an embodiment of the present invention may include following step S1-S3.
S1, terminal receive first voltage signal.
S2, terminal are according to the first current integration values of first voltage signal acquisition.
Wherein, the voltage value of first voltage signal is identical as the operating voltage of backlight to be detected, the first current integration values
It is backlight to be detected in preset duration, the integrated value of the electric current based on voltage value.
S3, terminal compare the first current integration values and the second current integration values, and export target control according to comparison result
Signal processed.
Wherein, which is used to indicate whether backlight to be detected breaks down.
Optionally, target control signal includes first control signal and second control signal, and first control signal is for referring to
Show that backlight to be detected breaks down, it is without failure that second control signal is used to indicate backlight to be detected；
It is above-mentioned that export target control signal according to comparison result may include: in first current integration values and described the
In the case that the difference of two current integration values is greater than or equal to first threshold, the first control signal is exported；Alternatively, described
In the case that the difference of first current integration values and second current integration values is less than the first threshold, output described second
Control signal.
The embodiment of the present invention provides a kind of backlight source detection method, and terminal can receive first voltage signal, and according to
One voltage signal obtains the first current integration values, the operating voltage phase of the voltage value of first voltage signal and backlight to be detected
Together, the first current integration values are backlight to be detected in preset duration, the electric current of the voltage value based on first voltage signal
Integrated value, the second current integration values are backlight to be detected in the case where normal work, to be checked based on this in preset duration
Survey the integrated value of the electric current of the operating voltage of backlight；；And compare the first current integration values and the second current integration values, Yi Jigen
Target control signal is exported according to comparison result, target control signal is used to indicate whether backlight to be detected breaks down.Pass through
The program, since (backlight i.e. to be detected is based on first voltage in preset duration to available first current integration values of terminal
The integrated value of the electric current of the voltage value of signal), and compare the first current integration values and the second current integration values, and can according to than
The output of relatively result is used to indicate the target control signal whether backlight to be detected breaks down, therefore can be real through the invention
The target control signal exported in the backlight source detection method provided in example is provided, judges whether backlight occurs event in display screen
Barrier.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, service
Device, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form belongs within protection of the invention.
Claims (13)
1. a kind of backlight power sense circuit characterized by comprising integration module and the mould compared with integration module connection
Block；
The integration module, for receiving first voltage signal, and according to first current integration of first voltage signal acquisition
Value, and export first current integration values to the comparison module, wherein the voltage value of the first voltage signal with to
The operating voltage for detecting backlight is identical, and first current integration values are the backlight to be detected in preset duration, base
In the integrated value of the electric current of the voltage value；Second current integration values are feelings of the backlight to be detected in normal work
Under condition, in preset duration, the integrated value of the electric current of the operating voltage based on the backlight to be detected；
The comparison module, for receiving first current integration values, and first current integration values and the second electricity
Integrated value is flowed, and target control signal is exported according to comparison result, the target control signal is used to indicate described to be detected
Whether backlight breaks down.
2. backlight power sense circuit according to claim 1, which is characterized in that the target control signal includes the first control
Signal processed and second control signal, the first control signal are used to indicate the backlight to be detected and break down, and described the
It is without failure that two control signals are used to indicate the backlight to be detected；
The comparison module, be greater than specifically for the difference in first current integration values and second current integration values or
In the case where equal to first threshold, the first control signal is exported；Alternatively, in first current integration values and described second
In the case that the difference of current integration values is less than the first threshold, the second control signal is exported.
3. backlight power sense circuit according to claim 1, which is characterized in that the integration module include: first resistor,
Second resistance, 3rd resistor, backlight, first switch, second switch, third switch, first capacitor and the operation to be detected
Amplifier；
The backlight is connected between the first end of the first resistor and the first input end of the operational amplifier, described
The second end of first resistor is connect with the first end of the second resistance, alternatively, the backlight is connected to the first resistor
Second end and the second resistance first end between, the first of the first end of the first resistor and the operational amplifier
Input terminal connection；
The first end of the second end of the second resistance and the first switch is inputted with the second of the operational amplifier respectively
The first end of end connection, the second end of the first switch and the 3rd resistor connects with the first end of the first capacitor respectively
It connects, the second end of the 3rd resistor is connect with the first end that third switchs, the second end and described first of the third switch
The second end of capacitor is connect with the first end of the second switch respectively, the second end of the second switch and the operation amplifier
The output end of device connects, and the output end of the operational amplifier is connect with the comparison module.
4. backlight power sense circuit according to claim 3, which is characterized in that the first switch is the first transistor,
The second switch is second transistor, and the third switch is third transistor；
The source electrode of the first transistor is the first end of the first switch, and the drain electrode of the first transistor is described first
The second end of switch, the source electrode of the second transistor are the first end of the second switch, the drain electrode of the second transistor
For the second end of the second switch, the source electrode of the third transistor is the first end of third switch, and the third is brilliant
The drain electrode of body pipe is the second end of third switch, passes through the grid of the first transistor, the grid of the second transistor
The grid incoming level of pole and the third transistor controls signal.
5. backlight power sense circuit according to claim 3 or 4, which is characterized in that the comparison module compares for hysteresis
Device.
6. backlight power sense circuit according to claim 5, which is characterized in that the hysteresis loop comparator includes: comparison list
Member, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance；
The first end of 4th resistance is connect with the output end of the amplifier, the second end of the 4th resistance and described the
The first end of five resistance is connected with the first input end of the comparing unit, and the second end of the 5th resistance is single compared with described
The output end connection of member, first end input second current integration values of the 6th resistance, the second of the 6th resistance
End is connect with the second input terminal of the first end of the 7th resistance and the comparing unit, the second termination of the 7th resistance
Ground.
7. backlight power sense circuit according to claim 6, which is characterized in that the backlight power sense circuit further include:
The first end of 8th resistance, the 8th resistance is connect with the first input end of the operational amplifier, the 8th resistance
Second end ground connection.
8. a kind of display module characterized by comprising at least one is such as the described in any item backlight inspections of claim 1-7
Slowdown monitoring circuit.
9. a kind of terminal characterized by comprising at least one is such as the described in any item backlight detection electricity of claim 1-7
Road.
10. a kind of terminal, which is characterized in that the terminal includes the first display screen, second display screen and control module；Described
One display screen and the second display screen include: at least one such as the described in any item backlight detection electricity of claim 1-7
Road, each backlight power sense circuit are connect with control module；
The control module, for receiving the of at least one backlight power sense circuit output in first display screen
In the case where one control signal, the changing interface shown in first display screen is shown into the second display screen, institute
It states the backlight that first control signal is used to indicate the backlight power sense circuit detection for exporting the first control signal and event occurs
Barrier.
11. terminal according to claim 10, which is characterized in that
The control module is also used to receiving at least one backlight power sense circuit output in first display screen
In the case where first control signal, the terminal output prompt information is controlled, the prompt information is shown for prompting described first
Backlight in display screen breaks down.
12. a kind of backlight source detection method characterized by comprising
First voltage signal is received, and according to first current integration values of first voltage signal acquisition；The first voltage letter
Number voltage value it is identical as the operating voltage of backlight to be detected, first current integration values be the backlight to be detected exist
In preset duration, the integrated value of the electric current based on the voltage value；Second current integration values are the backlight to be detected
In the case where normal work, in preset duration, the integrated value of the electric current of the operating voltage based on the backlight to be detected；
Compare first current integration values and the second current integration values, and target control signal is exported according to comparison result；
The target control signal is used to indicate whether the backlight to be detected breaks down.
13. according to the method for claim 12, which is characterized in that the target control signal include first control signal and
Second control signal, the first control signal are used to indicate the backlight to be detected and break down, the second control letter
It is without failure number to be used to indicate the backlight to be detected；
It is described that target control signal is exported according to comparison result, comprising:
In the case where the difference of first current integration values and second current integration values is greater than or equal to first threshold,
Export the first control signal；Alternatively, the difference in first current integration values and second current integration values is less than
In the case where the first threshold, the second control signal is exported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810975679.4A CN109342797A (en) | 2018-08-24 | 2018-08-24 | A kind of backlight power sense circuit, terminal and backlight source detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810975679.4A CN109342797A (en) | 2018-08-24 | 2018-08-24 | A kind of backlight power sense circuit, terminal and backlight source detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109342797A true CN109342797A (en) | 2019-02-15 |
Family
ID=65291806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810975679.4A Pending CN109342797A (en) | 2018-08-24 | 2018-08-24 | A kind of backlight power sense circuit, terminal and backlight source detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109342797A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110288935A (en) * | 2019-06-26 | 2019-09-27 | 广州小鹏汽车科技有限公司 | A kind of monitoring method and monitoring device of vehicle-mounted liquid crystal screen back light source |
| CN113257184A (en) * | 2021-05-10 | 2021-08-13 | 京东方科技集团股份有限公司 | Sampling circuit, driving method, pixel sampling circuit and display device |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1981563A (en) * | 2004-07-02 | 2007-06-13 | 皇家飞利浦电子股份有限公司 | Method and circuit for driving back a light emitter of a display apparatus |
| CN101295084A (en) * | 2007-04-25 | 2008-10-29 | 北京京东方光电科技有限公司 | Back light source brightness automatic regulating system and method |
| CN101452674A (en) * | 2007-12-03 | 2009-06-10 | 爱普生映像元器件有限公司 | Electrooptical apparatus, electronic device, and apparatus and method for detecting outside light |
| CN102543001A (en) * | 2011-12-15 | 2012-07-04 | 无锡中星微电子有限公司 | Backlight source brightness regulation method, system and device |
| CN103364707A (en) * | 2013-08-05 | 2013-10-23 | 莆田学院 | High-power LED (light-emitting diode) chip packaging quality detecting method |
| CN203405820U (en) * | 2013-06-27 | 2014-01-22 | 闽南师范大学 | Variable integral time constant integrator |
| CN103596346A (en) * | 2013-11-26 | 2014-02-19 | 常州市武进区半导体照明应用技术研究院 | LED lamp failure detecting method and device |
| CN104036706A (en) * | 2014-05-26 | 2014-09-10 | 京东方科技集团股份有限公司 | Fault detection method, device and system |
| CN204085732U (en) * | 2014-10-23 | 2015-01-07 | 重庆梅安森格易科技有限公司 | Temperature sensing circuit |
| CN204515306U (en) * | 2015-04-24 | 2015-07-29 | 合肥鑫晟光电科技有限公司 | Backlight pick-up unit |
| CN204613377U (en) * | 2015-05-13 | 2015-09-02 | 黄双喜 | A kind of LED light source tester |
| CN207651150U (en) * | 2017-08-17 | 2018-07-24 | 西安易朴通讯技术有限公司 | A kind of current sensing means and system for screen detection |
-
2018
- 2018-08-24 CN CN201810975679.4A patent/CN109342797A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1981563A (en) * | 2004-07-02 | 2007-06-13 | 皇家飞利浦电子股份有限公司 | Method and circuit for driving back a light emitter of a display apparatus |
| CN101295084A (en) * | 2007-04-25 | 2008-10-29 | 北京京东方光电科技有限公司 | Back light source brightness automatic regulating system and method |
| CN101452674A (en) * | 2007-12-03 | 2009-06-10 | 爱普生映像元器件有限公司 | Electrooptical apparatus, electronic device, and apparatus and method for detecting outside light |
| CN102543001A (en) * | 2011-12-15 | 2012-07-04 | 无锡中星微电子有限公司 | Backlight source brightness regulation method, system and device |
| CN203405820U (en) * | 2013-06-27 | 2014-01-22 | 闽南师范大学 | Variable integral time constant integrator |
| CN103364707A (en) * | 2013-08-05 | 2013-10-23 | 莆田学院 | High-power LED (light-emitting diode) chip packaging quality detecting method |
| CN103596346A (en) * | 2013-11-26 | 2014-02-19 | 常州市武进区半导体照明应用技术研究院 | LED lamp failure detecting method and device |
| CN104036706A (en) * | 2014-05-26 | 2014-09-10 | 京东方科技集团股份有限公司 | Fault detection method, device and system |
| CN204085732U (en) * | 2014-10-23 | 2015-01-07 | 重庆梅安森格易科技有限公司 | Temperature sensing circuit |
| CN204515306U (en) * | 2015-04-24 | 2015-07-29 | 合肥鑫晟光电科技有限公司 | Backlight pick-up unit |
| CN204613377U (en) * | 2015-05-13 | 2015-09-02 | 黄双喜 | A kind of LED light source tester |
| CN207651150U (en) * | 2017-08-17 | 2018-07-24 | 西安易朴通讯技术有限公司 | A kind of current sensing means and system for screen detection |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110288935A (en) * | 2019-06-26 | 2019-09-27 | 广州小鹏汽车科技有限公司 | A kind of monitoring method and monitoring device of vehicle-mounted liquid crystal screen back light source |
| CN110288935B (en) * | 2019-06-26 | 2022-07-12 | 广州小鹏汽车科技有限公司 | Monitoring method and monitoring device for vehicle-mounted liquid crystal display backlight source |
| CN113257184A (en) * | 2021-05-10 | 2021-08-13 | 京东方科技集团股份有限公司 | Sampling circuit, driving method, pixel sampling circuit and display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101339231B (en) | Battery state monitoring circuit and battery apparatus | |
| CN101351719B (en) | Device for monitoring cell voltage | |
| CN103840445B (en) | Integrated circuit and method for improved transient immunity | |
| CN105680422B (en) | Improved battery protects circuit and system | |
| CN201838982U (en) | Residual current protection device and circuit breaker using same | |
| CN102798817A (en) | Relay fault detection circuit and fault detection method thereof | |
| CN109342797A (en) | A kind of backlight power sense circuit, terminal and backlight source detection method | |
| CN207232324U (en) | A kind of fault diagnosis circuit of low side driving | |
| WO2022021964A1 (en) | Switch state testing circuit, method and apparatus | |
| US20220216528A1 (en) | Battery and automotive diagnostic tablet | |
| US8913361B2 (en) | Overvoltage protection circuit and portable electronic device comprising same | |
| CN1135132A (en) | Mechanism for controlling enabling test set assert off-hook condition on telephone lines | |
| CN101394185A (en) | Press-key detection circuit and method thereof | |
| CN113541250A (en) | Battery charging control circuit and electronic equipment | |
| US10778006B2 (en) | Chip position sensing for battery protectors | |
| CN104182315B (en) | A kind of circuit, electronic equipment and its corresponding commissioning device of control debugging function | |
| CN102624957B (en) | Detection system for earphone drive-by-wire button of mobile phone | |
| CN113302505A (en) | Switch state detection circuit, method and device | |
| CN209659302U (en) | A kind of interface gating circuit and communication equipment | |
| CN108879594A (en) | A kind of overcurrent protection circuit of server and its POL | |
| CN105762782A (en) | Electronic device and electrostatic discharging method | |
| US11729566B2 (en) | Judging circuit for positive and negative terminals of mic of earphone and method thereof, and eletronic device | |
| CN110715792B (en) | Display panel, test method and tool thereof and display device | |
| CN108493731B (en) | A kind of data line and its driving method | |
| CN113075534A (en) | Power chip detection circuit, power chip detection method and device and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190215 |