CN109584829A - Overcurrent protection method, display panel and overcurrent protection device - Google Patents
Overcurrent protection method, display panel and overcurrent protection device Download PDFInfo
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- CN109584829A CN109584829A CN201811595967.3A CN201811595967A CN109584829A CN 109584829 A CN109584829 A CN 109584829A CN 201811595967 A CN201811595967 A CN 201811595967A CN 109584829 A CN109584829 A CN 109584829A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
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- Theoretical Computer Science (AREA)
- Emergency Protection Circuit Devices (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application provides an overcurrent protection method, an overcurrent protection device and a display panel, wherein the overcurrent protection method comprises the following steps: acquiring a target maximum current value of each path of clock control signal within a preset time length, wherein one path of clock control signal correspondingly controls a row of switching devices to be turned on or turned off; acquiring difference absolute values between target maximum current values of the clock control signals of different paths; judging whether any difference absolute value is larger than a first preset threshold value; when any difference absolute value is larger than a first preset threshold value, a level converter used for generating each path of clock control signal is closed; and when each difference absolute value is smaller than a first preset threshold value, controlling the clock control signal to open the switching device line by line.
Description
Technical field
This application involves technical field of display panel, in particular to a kind of over-current protection method, display panel and overcurrent are protected
Protection unit.
Background technique
Array substrate row drives (Gate Driver On Array, GOA) technology, is a kind of by thin film transistor (TFT) (Thin
Film Transistor, TFT) gated sweep driving circuit be produced in array substrate, to substitute the production of external silicon chip
A kind of technology of driving chip.Since GOA circuit can be directly produced on around panel, liquid crystal display (Liquid can be reduced
Crystal Display, LCD) panel seal ring thickness, simplify making technology, and can reduce product cost, improve liquid
The integrated level of crystal panel.In the prior art, the problem of will appear line short in display panel using GOA technology, causing burn-in.
Apply for content
The main purpose of the application is to provide a kind of over-current protection method, display panel and overcurrent protective device, it is intended to solve
Certainly line short in display panel in the prior art, the problem of causing burn-in.
To achieve the above object, a kind of over-current protection method that the application proposes, the over-current protection method include as follows
Step:
Obtain target maximum current value of every road clock control signal in preset duration, wherein clock when described all the way
The corresponding control a line switching device of signal processed is turned on or off；
Obtain the absolute difference between the target maximum current value for the clock control signal that do not go the same way；
Judge whether any absolute difference is greater than the first preset threshold；
When any absolute difference is greater than the first preset threshold, then close for generating every road clock control signal
Level translator；
When each absolute difference is respectively less than the first preset threshold, controls the clock control signal and open line by line
The switching device.
Optionally, the step of target maximum current value for obtaining every road clock control signal in preset duration it
Afterwards, further includes:
Judge whether the target maximum current value is greater than the second preset threshold；
If the target maximum current value of clock control signal described in any road is greater than the second preset threshold, close for producing
The level translator of the road Sheng Mei clock control signal；
If the target maximum current value of clock control signal described in every road is respectively less than the second preset threshold, acquisition is executed not
The step of absolute difference between the target maximum current value for the clock control signal gone the same way.
Optionally, the step of target maximum current value for obtaining every road clock control signal in preset duration wraps
It includes:
Obtain the average current value of multiple maximum current values in multiple clock cycle of clock control signal described in every road；
Using the average current value as the target maximum current value.
Optionally, described when any absolute difference is greater than the first preset threshold, then it closes for generating every road
The step of level translator of clock control signal includes:
When any absolute difference is greater than the first preset threshold, being averaged for multiple absolute differences is obtained
Value；
If judging, the average value of the absolute difference is greater than the first preset threshold, closes clock when for generating every road
The level translator of signal processed.
Optionally, described when any absolute difference is greater than the first preset threshold, then it closes for generating every road
The step of level translator of clock control signal includes:
When any absolute difference is greater than the first preset threshold, the difference for being greater than the first preset threshold is obtained
The square value of absolute value；
If judging, the square value is greater than third predetermined threshold value, closes the level for generating every road clock control signal
Converter；Wherein, third predetermined threshold value is less than first preset threshold.
Optionally, before the step of control clock control signal opens the switching device line by line, further includes:
Amplify the current value of the clock control signal and keeps the voltage value of clock control signal constant.
Optionally, first preset threshold is predetermined voltage threshold, described to be greater than the in any absolute difference
When one preset threshold, then the step of closing the level translator for generating every road clock control signal includes: to obtain each institute
State the corresponding voltage value of absolute difference；If determining, the voltage value is greater than the predetermined voltage threshold, closes and generates every road
The level translator of clock control signal.
Optionally, the switching device is thin film transistor (TFT).
In addition, the application also provides a kind of display panel, the display panel include the sequence controller being sequentially electrically connected,
Level translator, current sensor and comparator execute the step of following over-current protection method when the display panel is run
It is rapid:
Target of the every road clock control signal of sequence controller generation in preset duration is obtained by current sensor
Maximum current value, wherein the corresponding control a line switching device of the clock control signal is turned on or off all the way；
The difference between the target maximum current value for the clock control signal that do not go the same way is obtained by the comparator
Absolute value；
Judge whether any absolute difference is greater than the first preset threshold；
When any absolute difference is greater than the first preset threshold, then close for generating every road clock control signal
Level translator；
When each absolute difference is respectively less than the first preset threshold, controls the clock control signal and open line by line
The switching device.
In addition, the application also provides a kind of overcurrent protective device, the overcurrent protective device includes: memory, processor
And it is stored in the overcurrent protection program that can be run on the memory and on the processor, the overcurrent protection program is by institute
It states when processor executes and realizes following steps:
Obtain target maximum current value of every road clock control signal in preset duration, wherein clock when described all the way
The corresponding control a line switching device of signal processed is turned on or off；
Obtain the absolute difference between the target maximum current value for the clock control signal that do not go the same way；
Judge whether any absolute difference is greater than the first preset threshold；
When any absolute difference is greater than the first preset threshold, then close for generating every road clock control signal
Level translator；
When each absolute difference is respectively less than the first preset threshold, controls the clock control signal and open line by line
The switching device.
The application is by obtaining the target maximum current value of every road clock control signal and obtaining the clock control that do not go the same way
Absolute difference between the target maximum current of signal is closed when any absolute difference is greater than the first preset threshold
The level translator for generating each clock control signal interrupts the transmit process of the clock control signal, avoids the display
Panel is burned out, and when all absolute differences are respectively less than the first preset threshold, are controlled the display panel and is worked normally.
In particular, it should be pointed out that since the application is the target maximum current by the clock control signal of not going the same way
Between absolute difference and preset first threshold value between comparison result go to control whether to close the level translator, due to
Under normal circumstances, the difference between the target maximum current value of the clock control signal is very small, the difference theoretically acquired
Absolute value is 0, therefore first preset threshold can design smaller, and at certain, clock control signal has compared with minor swing and leads all the way
When the absolute difference being caused to be greater than the first preset threshold, the level translator can be also shut off promptly, and avoid clock control
Signal has saves bit by bit heat without being detected compared with minor swing in display panel, avoids the heat saved bit by bit in display panel excessive
Burn out display device.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the terminal structure schematic diagram for the hardware running environment that the embodiment of the present invention is related to；
Fig. 2 is the flow diagram of an embodiment of over-current protection method of the present invention；
Fig. 3 is the flow diagram of another embodiment of over-current protection method of the present invention；
Fig. 4 is the flow diagram of the another embodiment of over-current protection method of the present invention；
Fig. 5 is the flow diagram of the another embodiment of over-current protection method of the present invention；
Fig. 6 is the flow diagram of the another embodiment of over-current protection method of the present invention；
Fig. 7 is the flow diagram of the another embodiment of over-current protection method of the present invention；
Fig. 8 is the flow diagram of the another embodiment of over-current protection method of the present invention.
The embodiments will be further described with reference to the accompanying drawings for realization, functional characteristics and the advantage of the application purpose.
Specific embodiment
It should be appreciated that specific embodiment described herein is only used to explain the application, it is not used to limit the application.
The primary solutions of the embodiment of the present application are:
Obtain target maximum current value of every road clock control signal in preset duration, wherein clock when described all the way
The corresponding control a line switching device of signal processed is turned on or off；
Obtain the absolute difference between the target maximum current value for the clock control signal that do not go the same way；
Judge whether any absolute difference is greater than the first preset threshold；
When any absolute difference is greater than the first preset threshold, then close for generating every road clock control signal
Level translator；
When each absolute difference is respectively less than the first preset threshold, controls the clock control signal and open line by line
The switching device.
In the prior art, the problem of will appear line short in display panel using GOA technology, causing burn-in.
The application is by obtaining the target maximum current value of every road clock control signal and obtaining clock control letter of not going the same way
Number target maximum current between absolute difference, any absolute difference be greater than the first preset threshold when, close generate
The level translator of each clock control signal interrupts the transmit process of the clock control signal, avoids the display panel
It is burned out, when all absolute differences are respectively less than the first preset threshold, control the display panel and work normally.
In particular, it should be pointed out that since the application is the target maximum current by the clock control signal of not going the same way
Between absolute difference and preset first threshold value between comparison result go to control whether to close the level translator, due to
Under normal circumstances, the difference between the target maximum current value of the clock control signal is very small, the difference theoretically acquired
Absolute value is 0, therefore first preset threshold can design smaller, and at certain, clock control signal has compared with minor swing and leads all the way
When the absolute difference being caused to be greater than the first preset threshold, the level translator can be also shut off promptly, and avoid clock control
Signal, which has, saves bit by bit heat without being detected in display panel compared with minor swing, and the heat saved bit by bit in display panel is avoided excessively to burn
Bad display device.
As shown in Figure 1, Fig. 1 is the terminal structure schematic diagram for the hardware running environment that the embodiment of the present application scheme is related to.
The embodiment of the present application terminal can be PC, be also possible to smart phone, tablet computer, portable computer etc. with aobvious
Show the packaged type terminal device of function.
As shown in Figure 1, the terminal may include: processor 1001, such as CPU, network interface 1004, user interface
1003, memory 1005, communication bus 1002.Wherein, communication bus 1002 is for realizing the connection communication between these components.
User interface 1003 may include display screen (Display), input unit such as keyboard (Keyboard), optional user interface
1003 can also include standard wireline interface and wireless interface.Network interface 1004 optionally may include that the wired of standard connects
Mouth, wireless interface (such as WI-FI interface).Memory 1005 can be high speed RAM memory, be also possible to stable memory
(non-volatile memory), such as magnetic disk storage.Memory 1005 optionally can also be independently of aforementioned processor
1001 storage device.
It will be understood by those skilled in the art that the restriction of the not structure paired terminal of terminal structure shown in Fig. 1, can wrap
It includes than illustrating more or fewer components, perhaps combines certain components or different component layouts.
As shown in Figure 1, as may include that operating system, network are logical in a kind of memory 1005 of computer storage medium
Believe module, Subscriber Interface Module SIM and overcurrent protection program.
In terminal shown in Fig. 1, network interface 1004 is mainly used for connecting background server, carries out with background server
Data communication；User interface 1003 is mainly used for connecting client (user terminal), carries out data communication with client；And processor
1001 can be used for calling the overcurrent protection program stored in memory 1005, and execute following operation:
Obtain target maximum current value of every road clock control signal in preset duration, wherein clock when described all the way
The corresponding control a line switching device of signal processed is turned on or off；
Obtain the absolute difference between the target maximum current value for the clock control signal that do not go the same way；
Judge whether any absolute difference is greater than the first preset threshold；
When any absolute difference is greater than the first preset threshold, then close for generating every road clock control signal
Level translator；
When each absolute difference is respectively less than the first preset threshold, controls the clock control signal and open line by line
The switching device.
Further, processor 1001 can call the overcurrent protection program stored in memory 1005, also execute following
Operation:
Judge whether the target maximum current value is greater than the second preset threshold；
If the target maximum current value of clock control signal described in any road is greater than the second preset threshold, close for producing
The level translator of the road Sheng Mei clock control signal；
If the target maximum current value of clock control signal described in every road is respectively less than the second preset threshold, acquisition is executed not
The step of absolute difference between the target maximum current value for the clock control signal gone the same way.
Further, processor 1001 can call the overcurrent protection program stored in memory 1005, also execute following
Operation:
Obtain the average current value of multiple maximum current values in multiple clock cycle of clock control signal described in every road；
Using the average current value as the target maximum current value.
Further, processor 1001 can call the overcurrent protection program stored in memory 1005, also execute following
Operation:
When any absolute difference is greater than the first preset threshold, being averaged for multiple absolute differences is obtained
Value；
If judging, the absolute difference average value is greater than the first preset threshold, closes for generating every road clock control
The level translator of signal.
Further, processor 1001 can call the overcurrent protection program stored in memory 1005, also execute following
Operation:
When any absolute difference is greater than the first preset threshold, the difference for being greater than the first preset threshold is obtained
The square value of absolute value；
If judging, the square value is greater than third predetermined threshold value, closes the level for generating every road clock control signal
Converter；
Wherein, third predetermined threshold value is less than first preset threshold.
Further, processor 1001 can call the overcurrent protection program stored in memory 1005, also execute following
Operation:
Amplify the current value of the clock control signal and keeps the voltage value of clock control signal constant.
Further, processor 1001 can call the overcurrent protection program stored in memory 1005, also execute following
Operation:
Obtain the corresponding voltage value of each absolute difference；
If determining, the voltage value is greater than the predetermined voltage threshold, closes the level for generating every road clock control signal
Converter.
Referring to Fig. 2, as an embodiment of the application over-current protection method, the over-current protection method, including walk as follows
It is rapid:
S10 obtains target maximum current value of every road clock control signal in preset duration, wherein when described all the way
The corresponding control a line switching device of clock signal is turned on or off.
In the present embodiment, the clock control signal is generated by level translator (Level Shifter), each described
Level translator generates the clock control signal all the way, and the corresponding control a line switching device of the clock control signal all the way
It is turned on or off, for example, corresponding row is opened when the clock control signal exports high level to the switching device of corresponding row
Device is closed to be opened, when the clock control signal exports low level to the switching device of corresponding row, the derailing switch of corresponding row
Part is closed.
The switching device that the clock control signal of generation passes to corresponding row is controlled in the level translator
Before system, any time of the clock control signal or the current value of default sampled point are sensed by current sensor, and
Target maximum current value is obtained from the current value.The target maximum current value can be the clock control signal one
Maximum current value in period is also possible to the flat of corresponding multiple maximum current values of multiple periods of clock control signal all the way
Mean value.Optionally, the switching device is thin film transistor (TFT).
S20 obtains the absolute difference between the target maximum current value for the clock control signal that do not go the same way.
In the present embodiment, it can be asked using the target maximum current value of clock control signal described in any road as a reference value
The target maximum current value of remaining each road clock control signal and the difference of a reference value are taken, such as with 4 clock control signals
For CLK-1in, CLK-2in, CLK-3in, CLK-4in, it is assumed that the target of CLK-1in, CLK-2in, CLK-3in, CLK-4in
Maximum current value is respectively CLK-1-Imax, CLK-2-Imax, CLK-3-Imax and CLK-4-Imax, corresponding with CLK-1in
Be worth on the basis of target maximum current value, seek remaining each road clock control signal target maximum current value CLK-2-Imax,
The difference of CLK-3-Imax and CLK-4-Imax and a reference value, then have:
Difference A=CLK-1-Imax-CLK-2-Imax；
Difference B=CLK-1-Imax-CLK-3-Imax；
Difference C=CLK-1-Imax-CLK-4-Imax；
It is appreciated that can also be worth on the basis of any of CLK-2-Imax, CLK-3-Imax and CLK-4-Imax, in turn
Seek the target maximum current value of a reference value Yu remaining each road clock control signal.
In the present embodiment, the difference is also possible between the target maximum current value of adjacent two-way clock control signal
Compare, such as:
Difference D=CLK-1-Imax-CLK-2-Imax；
Difference E=CLK-2-Imax-CLK-3-Imax；
Difference F=CLK-3-Imax-CLK-4-Imax；
Alternatively, the target maximum current value for being computed the clock control signal of difference is not computing repeatedly, such as:
Difference G=CLK-1-Imax-CLK-2-Imax；
Difference H=CLK-3-Imax-CLK-4-Imax；
Alternatively, the target maximum current value of clock control signal calculating difference between any two, such as
Difference I=CLK-1-Imax-CLK-2-Imax；
Difference J=CLK-1-Imax-CLK-3-Imax；
Difference K=CLK-1Imax-CLK-3-Imax
Difference L=CLK-2Imax-CLK-3-Imax；
Difference M=CLK-2-Imax-CLK-4-Imax；
Difference N=CLK-3-Imax-CLK-4-Imax；
The calculated result of above-mentioned difference may be positive, it is also possible to be negative value, therefore above-mentioned difference is taken absolute value.
S30, judges whether any absolute difference is greater than the first preset threshold.
In the present embodiment, first preset threshold can be preset current value or preset voltage value.
Under normal circumstances, the difference between the target maximum current value of the clock control signal is very small, theoretically
The absolute difference acquired is 0, therefore first preset threshold can design smaller, such as may be configured as 0.1V, 0.2V, 0.5V
Deng.
S40 is then closed for generating every road clock control when any absolute difference is greater than the first preset threshold
The level translator of signal.
In the present embodiment, when have the absolute difference be greater than the first preset threshold when, as difference A, B, C, D, E, F,
G, when the absolute value of any difference of H, I, J, K, L, M, N is greater than the first preset threshold, it was demonstrated that corresponding to the absolute difference
There is a clock control signal target maximum current value larger in two clock control signals, and the biggish target maximum current
Caused by value may be display panel internal short-circuit, even if not being the maximum electricity of the biggish target caused by display panel internal short-circuit
Flow valuve can also cause display panel chiropractic hot, and display panel internal short-circuit or accumulated heat will lead to display panel and burn out, therefore, appoint when having
When one absolute difference is greater than the first preset threshold, the level conversion for generating every road clock control signal is closed in time
Device, interrupt clock signal continue effectively display panel to be avoided to be burned out to the display panel transmit process.
S50 controls the clock control signal line by line when each absolute difference is respectively less than the first preset threshold
Open the switching device.
In the present embodiment, if each difference is respectively less than the first preset threshold, it was demonstrated that in the display panel not
In the presence of short circuit or any road clock signal there is no fluctuation, the risk that display panel is not burned out at this time, therefore described in controlling
Clock control signal opens the switching device line by line, realizes the normal display function of the display panel.
In conclusion when the application is not gone the same way by the target maximum current value and acquisition for obtaining every road clock control signal
Absolute difference between the target maximum current of clock signal, when any absolute difference is greater than the first preset threshold,
The level translator for generating each clock control signal is closed, the transmit process of the clock control signal is interrupted, is avoided described
Display panel is burned out, and when all absolute differences are respectively less than the first preset threshold, are controlled the display panel and is worked normally.
In particular, it should be pointed out that since the application is the target maximum current by the clock control signal of not going the same way
Between absolute difference and preset first threshold value between comparison result go to control whether to close the level translator, due to
Under normal circumstances, the difference between the target maximum current value of the clock control signal is very small, the difference theoretically acquired
Absolute value is 0, therefore first preset threshold can design smaller, and at certain, clock control signal has compared with minor swing and leads all the way
When the absolute difference being caused to be greater than the first preset threshold, the level translator can be also shut off promptly, and avoid clock control
Signal, which has, saves bit by bit heat without being detected in display panel compared with minor swing, and the heat saved bit by bit in display panel is avoided excessively to burn
Bad display device.
Referring to Fig. 3, as another embodiment of the application over-current protection method, after the step S10, further includes:
S60, judges whether the target maximum current value is greater than the second preset threshold；
S70 closes use if the target maximum current value of clock control signal described in any road is greater than the second preset threshold
In the level translator for generating every road clock control signal；
If the target maximum current value of clock control signal described in every road is respectively less than the second preset threshold, step is continued to execute
Rapid S20.
In the present embodiment, second preset threshold can be preset current value or preset voltage value.
After the target maximum current value for getting clock control signal described in every road, target is first judged whether there is
Maximum current value is greater than the second preset threshold, and second preset threshold is greater than the first preset threshold, if clock described in any road
The target maximum current value for controlling signal is greater than the second preset threshold, then directly closes for generating every road clock control signal
Level translator, and do not have to obtain the absolute difference between the target maximum current value for the clock control signal that do not go the same way
Afterwards compared with the first preset threshold, to simplify treatment process, processing speed is improved.
Referring to Fig. 4, as the another embodiment of the application over-current protection method, the step S10 includes:
S11 obtains the average electricity of multiple maximum current values in multiple clock cycle of clock control signal described in every road
Flow valuve；
S12, using the average current value as the target maximum current value.
In the present embodiment, when the maximum current value that the target maximum current value is in one period of clock signal
When, erroneous judgement can be generated and close the level translator and will lead to display panel cisco unity malfunction, therefore the present embodiment is by asking
The average current value of multiple maximum current values in multiple clock cycle of clock control signal described in the road Qu Mei, will be described average
Current value is as the target maximum current value, if the average current value of multiple maximum current values in multiple periods is pre- with first
If the absolute difference of threshold value is still greater than the first preset threshold, then it can determine that the display panel internal short-circuit or generate accumulated heat,
To avoid the case where judging by accident.
Referring to Fig. 5, as the another embodiment of the application over-current protection method, the step S40 includes:
S41 obtains the flat of multiple absolute differences when any absolute difference is greater than the first preset threshold
Mean value；
S42 is closed if the judgement absolute difference average value is greater than the first preset threshold for generating every road clock
Control the level translator of signal.
In the present embodiment, when only one absolute difference is greater than the first preset threshold, which can
Can generate erroneous judgement in display panel caused by the fluctuation of load and close the level translator and cause display panel cannot
It works normally, therefore the present embodiment is preset the average value with third by seeking the average value of multiple absolute differences
Threshold value carries out size judgement, when only one biggish described absolute difference is to be greater than others because the fluctuation of load causes
When absolute difference, all absolute difference average values are certainly less than first preset threshold, at this point, need not then close institute
Level translator is stated, display panel works normally, to avoid the case where judging by accident.
If judging, the first preset threshold is still greater than in the average value of the absolute difference, which is particularly likely that aobvious
Caused by showing panel internal short-circuit, then the level translator for generating every road clock control signal is closed, to the display panel
It is protected.
Referring to Fig. 6, as the another embodiment of the application over-current protection method, the step S40 includes:
S43 is obtained when any absolute difference is greater than the first preset threshold and is greater than the described of the first preset threshold
The square value of absolute difference；
S44 is closed if the judgement square value is greater than third predetermined threshold value for generating every road clock control signal
Level translator；Wherein, third predetermined threshold value is less than first preset threshold.
In the present embodiment, the third predetermined threshold value can be preset current value or preset voltage value.
Since the absolute difference is generally less than 1, the square value of the absolute difference will be smaller, by the smaller difference
Compared with the square value of value absolute value is gone with the third predetermined threshold value less than the first preset threshold, to judge whether to close the electricity
Flat turn parallel operation is to judge base presetting threshold with the third since the third predetermined threshold value is less than first preset threshold
In the case where standard, it can detect smaller fluctuation in the display panel and go to close level translator, more delicately go to avoid
The thermogenetic burn-in problem of product.
Referring to Fig. 7, as the another embodiment of the application over-current protection method, before the step S50, further includes:
S80 amplifies the current value of the clock control signal and keeps the voltage value of clock control signal constant.
In the present embodiment, by output buffer (Out Buffer) to the current value of the clock control signal signal
It amplifies, enhances the driving capability of the clock signal to drive the switching device to open line by line, meanwhile, clock when holding
The voltage value of signal processed is constant, namely keeps the voltage value of the clock control signal for the cut-in voltage of the switching device.
Referring to Fig. 8, as the another embodiment of the application over-current protection method, first preset threshold is predeterminated voltage
Threshold value, the step S40 include:
S45 obtains the corresponding voltage value of each difference；
S46, if determining, the voltage value is greater than the predetermined voltage threshold, closes and generates every road clock control signal
Level translator.
In the present embodiment, since first preset threshold is usually set to voltage value, and the difference be target most
Difference between high current, therefore the difference is also current value, thus need for the difference to be converted to current value with it is described pre-
If voltage threshold is compared, in the present embodiment, image current is obtained by each difference of mirror current source mirror image, and
The corresponding voltage value of the difference is obtained according to the image current, and the voltage value and the predetermined voltage threshold are carried out
Size compares, to judge whether to close the level translator for generating every road clock control signal.
In addition, the application also provides a kind of display panel, the display panel include the sequence controller being sequentially electrically connected,
Level translator, current sensor and comparator execute the step of following over-current protection method when the display panel is run
It is rapid:
Target of the every road clock control signal of sequence controller generation in preset duration is obtained by current sensor
Maximum current value, wherein the corresponding control a line switching device of the clock control signal is turned on or off all the way；
The difference between the target maximum current value for the clock control signal that do not go the same way is obtained by the comparator
Absolute value；
Judge whether any absolute difference is greater than the first preset threshold；
When any absolute difference is greater than the first preset threshold, then close for generating every road clock control signal
Level translator；
When each absolute difference is respectively less than the first preset threshold, controls the clock control signal and open line by line
The switching device.
In addition, the application also provides a kind of overcurrent protective device, the overcurrent protective device includes: memory, processor
And it is stored in the overcurrent protection program that can be run on the memory and on the processor, the overcurrent protection program is by institute
It states when processor executes and realizes following steps:
Obtain target maximum current value of every road clock control signal in preset duration, wherein clock when described all the way
The corresponding control a line switching device of signal processed is turned on or off；
Obtain the absolute difference between the target maximum current value for the clock control signal that do not go the same way；
Judge whether any absolute difference is greater than the first preset threshold；
When any absolute difference is greater than the first preset threshold, then close for generating every road clock control signal
Level translator；
When each absolute difference is respectively less than the first preset threshold, controls the clock control signal and open line by line
The switching device.
The foregoing is merely the alternative embodiments of the application, are not intended to limit the scope of the patents of the application, all at this
Under the application design of application, using equivalent structure transformation made by present specification and accompanying drawing content, or directly/use indirectly
In the scope of patent protection that other related technical areas are included in the application.
Claims (10)
1. a kind of over-current protection method, which is characterized in that the over-current protection method includes the following steps:
Obtain target maximum current value of every road clock control signal in preset duration, wherein the clock control letter all the way
Number corresponding control a line switching device is turned on or off；
Obtain the absolute difference between the target maximum current value for the clock control signal that do not go the same way；
Judge whether any absolute difference is greater than the first preset threshold；
When any absolute difference is greater than the first preset threshold, then the electricity for generating every road clock control signal is closed
Flat turn parallel operation；
When each absolute difference is respectively less than the first preset threshold, control described in the clock control signal opens line by line
Switching device.
2. over-current protection method according to claim 1, which is characterized in that described to obtain every road clock control signal pre-
If after the step of target maximum current value in duration, further includes:
Judge whether the target maximum current value is greater than the second preset threshold；
If the target maximum current value of clock control signal described in any road is greater than the second preset threshold, close every for generating
The level translator of road clock control signal；
If the target maximum current value of clock control signal described in every road is respectively less than the second preset threshold, executes acquisition and do not go the same way
The clock control signal target maximum current value between absolute difference the step of.
3. over-current protection method according to claim 1, which is characterized in that described to obtain every road clock control signal pre-
If the step of target maximum current value in duration, includes:
Obtain the average current value of multiple maximum current values in multiple clock cycle of clock control signal described in every road；
Using the average current value as the target maximum current value.
4. over-current protection method according to claim 1, which is characterized in that described to be greater than in any absolute difference
When the first preset threshold, then the step of closing the level translator for generating every road clock control signal, includes:
When any absolute difference is greater than the first preset threshold, the average value of multiple absolute differences is obtained；
If judging, the average value of the absolute difference is greater than the first preset threshold, closes for generating every road clock control letter
Number level translator.
5. over-current protection method according to claim 1, which is characterized in that described to be greater than in any absolute difference
When the first preset threshold, then the step of closing the level translator for generating every road clock control signal, includes:
When any absolute difference is greater than the first preset threshold, obtain absolute greater than the difference of the first preset threshold
The square value of value；
If judging, the square value is greater than third predetermined threshold value, closes the level conversion for generating every road clock control signal
Device；Wherein, third predetermined threshold value is less than first preset threshold.
6. over-current protection method according to claim 1, which is characterized in that the control clock control signal is line by line
Before the step of opening the switching device, further includes:
Amplify the current value of the clock control signal and keeps the voltage value of clock control signal constant.
7. over-current protection method according to claim 1, which is characterized in that first preset threshold is predeterminated voltage threshold
Value, it is described when any absolute difference is greater than the first preset threshold, then it closes for generating every road clock control signal
Level translator the step of include:
Obtain the corresponding voltage value of each absolute difference；
If determining, the voltage value is greater than the predetermined voltage threshold, closes the level conversion for generating every road clock control signal
Device.
8. over-current protection method according to claim 1-7, which is characterized in that the switching device is that film is brilliant
Body pipe.
9. a kind of display panel, which is characterized in that the display panel includes the sequence controller being sequentially electrically connected, level conversion
Device, current sensor and comparator, when the display panel is run, the step of executing following over-current protection method:
It is maximum that target of the every road clock control signal of sequence controller generation in preset duration is obtained by current sensor
Current value, wherein the corresponding control a line switching device of the clock control signal is turned on or off all the way；
The difference obtained between the target maximum current value for the clock control signal that do not go the same way by the comparator is absolute
Value；
Judge whether any absolute difference is greater than the first preset threshold；
When any absolute difference is greater than the first preset threshold, then the electricity for generating every road clock control signal is closed
Flat turn parallel operation；
When each absolute difference is respectively less than the first preset threshold, control described in the clock control signal opens line by line
Switching device.
10. a kind of overcurrent protective device, which is characterized in that the overcurrent protective device includes: memory, processor and is stored in
On the memory and the overcurrent protection program that can run on the processor, the overcurrent protection program is by the processor
Following steps are realized when execution:
Obtain target maximum current value of every road clock control signal in preset duration, wherein the clock control letter all the way
Number corresponding control a line switching device is turned on or off；
Obtain the absolute difference between the target maximum current value for the clock control signal that do not go the same way；
Judge whether any absolute difference is greater than the first preset threshold；
When any absolute difference is greater than the first preset threshold, then the electricity for generating every road clock control signal is closed
Flat turn parallel operation；
When each absolute difference is respectively less than the first preset threshold, control described in the clock control signal opens line by line
Switching device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811595967.3A CN109584829B (en) | 2018-12-25 | 2018-12-25 | Overcurrent protection method, display panel and overcurrent protection device |
| PCT/CN2019/124260 WO2020135021A1 (en) | 2018-12-25 | 2019-12-10 | Overcurrent protection method, display panel, and overcurrent protection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811595967.3A CN109584829B (en) | 2018-12-25 | 2018-12-25 | Overcurrent protection method, display panel and overcurrent protection device |
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| CN109584829B CN109584829B (en) | 2020-10-30 |
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| WO2020135021A1 (en) | 2020-07-02 |
| CN109584829B (en) | 2020-10-30 |
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