CN108682376A - Overcurrent protection system and overcurrent protection method - Google Patents
Overcurrent protection system and overcurrent protection method Download PDFInfo
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- CN108682376A CN108682376A CN201810463410.8A CN201810463410A CN108682376A CN 108682376 A CN108682376 A CN 108682376A CN 201810463410 A CN201810463410 A CN 201810463410A CN 108682376 A CN108682376 A CN 108682376A
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- 239000011159 matrix material Substances 0.000 claims description 77
- 230000005611 electricity Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 4
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- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
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Classifications
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
Abstract
The invention discloses an overcurrent protection system and an overcurrent protection method. The driving module is used for providing a first driving signal to the gate driving array. The first current adjusting circuit is coupled between the driving module and the gate driving array, wherein the first current adjusting circuit is located on a current path of a first signal current of the first driving signal. During the pulse period of the first signal current, if the absolute value of the magnitude of the first signal current is greater than a preset threshold value and continuously exceeds a preset time length, the first current adjusting circuit limits the absolute value of the magnitude of the first signal current not to be greater than the preset threshold value until the pulse period of the first signal current is finished.
Description
Technical field
The present invention is in relation to the over-current protection system and overcurrent protection method suitable for display panel.
Background technology
The overcurrent protection for protecting gate drive module is generally comprised in traditional monitor.Overcurrent above-mentioned
When the temporal summation that overcurrent event occurs in gate drive module for protective device reaches specific time length, it can just start electricity
Flow protection mechanism.However, during overcurrent protection above-mentioned calculates the time sum total that overcurrent event occurs, lock
Pole drive module persistently subjects excessive electric current.Therefore, even if traditional monitor has overcurrent protection, tradition is aobvious
Show that the gate drive module in device is still easy to damage because bearing excessive electric current for a long time.
Invention content
In view of this, how to be provided in that when overcurrent event occurs the electric current that gate drive module is born can be reduced in time
The over-current protection system and overcurrent protection method of size, actually industry have problem to be solved.
Over-current protection system includes to be suitable for a display panel, which includes that a gate drive array and one are aobvious
Show area, which includes a drive module and one first matrix current adjustment circuit.Drive module is for providing one the
One drive signal is to the gate drive array.First matrix current adjustment circuit be coupled to the drive module and the gate drive array it
Between, wherein first matrix current adjustment circuit is located on the current path of one first signal code of first drive signal.Wherein,
During the pulse of first signal code, if the absolute value of the size of first signal code is more than more than a predetermined threshold level
One predetermined time period, the absolute value which limits the size of first signal code are default no more than this
Threshold value terminates during the pulse of first signal code.
Overcurrent protection method is suitable for a display panel, which includes a gate drive array and a display
Area, the overcurrent protection method comprise the steps of：A drive module is provided, wherein the drive module is driven for providing one first
Signal is moved to the gate drive array；One first matrix current adjustment circuit is provided, wherein first matrix current adjustment circuit is coupled to this
Between drive module and the gate drive array, and the current path of one first signal code positioned at first drive signal
On；During the pulse of first signal code, if the absolute value of the size of first signal code is more than a predetermined threshold level
More than a predetermined time period, the absolute value for the size for limiting first signal code using first matrix current adjustment circuit is little
In the predetermined threshold level, terminate during the pulse of first signal code.
Over-current protection system and overcurrent protection method in above-described embodiment can prevent display panel because for a long time
It bears excessive electric current and damages.
Description of the drawings
For above-mentioned and other purposes, feature, advantage and the embodiment of invention can be clearer and more comprehensible, the explanation of institute's accompanying drawings
It is as follows：
Fig. 1 is the functional block diagram after being simplified according to the over-current protection system of one embodiment of the invention.
Fig. 2 is according to the functional block diagram after the gate drive module reduction of one embodiment of the invention.
Fig. 3 is the timing variations figure after being simplified according to a running embodiment of the over-current protection system of Fig. 1.
Fig. 4 is the timing variations figure after being simplified according to another running embodiment of the over-current protection system of Fig. 1.
Fig. 5 a and Fig. 5 b are painted the flow chart of the overcurrent protection method of one embodiment of the invention jointly.
Wherein, reference numeral is：
100：Over-current protection system
101：Display panel
103：Gate drive module
105：Viewing area
110：Drive module
120a~120n：Matrix current adjustment circuit
130：Logic circuit
140：Storage module
201：Short circuit paths
203a~203n：Shift register
500：Overcurrent protection method
Ihck1：First signal code
Ihck2：Second signal electric current
Vhck1：First clock signal
Vhck2：Second clock signal
Vssg：Fixed voltage
Vst：Initial pulse signal
Tp：During pulse
T1、T2、T3：First period, the second period, third period
S502~s528：Flow
Specific implementation mode
Illustrate the embodiment of the present invention below in conjunction with correlative type.In the drawings, identical label indicate it is identical or
Similar element or method flow.
Fig. 1 is the functional block diagram after being simplified according to the over-current protection system 100 of one embodiment of the invention.Over current protection
Protecting system 100 includes drive module 110, multiple matrix current adjustment circuit 120a~120n, logic circuit 130 and storage module 140,
Wherein storage module 140 is coupled to logic circuit 130, and operates required information for stored logic circuit 130.To make drawing
Succinct and ease of explanation, the other elements in over-current protection system 100 are not illustrated in Fig. 1 with connection relation.
Over-current protection system 100 is coupled to display panel 101, and wherein display panel 101 includes gate drive module 103
With viewing area 105.In gate drive module 103 overcurrent (overcurrent) event can occur for over-current protection system 100
When, the electric current in limitation or cut-off gate drive module 103, to prevent gate drive module 103 from being damaged because of overcurrent.
In the present embodiment, over-current protection system 100 and display panel 101 are respectively arranged at different substrate.However,
In some embodiments, over-current protection system 100 also can be set to same substrate with display panel 101.
Fig. 2 is the functional block diagram after being simplified according to the gate drive module 103 of one embodiment of the invention.Referring concurrently to figure
1 and Fig. 2, drive module 110 is for exporting the first clock signal Vhck1, the second clock signal Vhck2, initial pulse signal Vst
With fixed voltage Vssg to gate drive module 103, the display picture of viewing area 105 is updated with control grid drive module 103.
Wherein, the first clock signal Vhck1, the second clock signal Vhck2 are used to make multiple shift registers of gate drive module 103
203a~203n is sequentially operated.Initial pulse signal Vst is then used to trigger gate when each frame picture of viewing area 105 starts
Drive array 103.
It note that small English index a~n in the element number used in this case specification and schema, be intended merely to
Facilitate the other element of denotion, is not intended that and the quantity of aforementioned components is confined to given number.In this case specification and schema
In, if not indicating the element number or the index of signal number when using a certain element number or signal number, representing should
Element number or signal number are to censure not specific any element or signal in affiliated element group or signal group.For example,
The object that element number 120a is censured is matrix current adjustment circuit 120a, and the object that element number 120 is censured is then electric current adjustment
Not specific arbitrary matrix current adjustment circuit 120 in circuit 120a~120n.
Matrix current adjustment circuit 120a be located at the first clock signal Vhck1 drive module 110 and gate drive module 103 it
Between signal path on.Matrix current adjustment circuit 120b is located at the second clock signal Vhck2 in drive module 110 and gate drive mould
On signal path between block 103.Matrix current adjustment circuit 120c is located at fixed voltage Vssg in drive module 110 and gate drive
On signal path between module 103.Matrix current adjustment circuit 120n is located at initial pulse signal Vst in drive module 110 and lock
On signal path between pole drive module 103, the rest may be inferred for remaining.
Also that is, matrix current adjustment circuit 120a~120n is each located between drive module 110 and gate drive module 103
On multiple signal paths
When matrix current adjustment circuit 120a~120n detects that the size of the signal code of corresponding signal is more than pre- gating
When threshold value, corresponding signal code can be limited to predetermined threshold level hereinafter, to prevent lock by matrix current adjustment circuit 120a~120n
Drive module 103 long-time in pole bears super-high-current.For example, work as the first signal code Ihck1 of the first clock signal Vhck1
When size is more than predetermined threshold level, matrix current adjustment circuit 120a can limit the first signal code Ihck1.In another example when second
When the size of the second signal electric current Ihck2 of arteries and veins signal Vhck2 is more than predetermined threshold level, matrix current adjustment circuit 120b can limit the
Binary signal electric current Ihck2, the rest may be inferred for remaining.
In implementation, matrix current adjustment circuit 120a~120n can use comparator, switching circuit, resistance-capacitance circuit (R-C
Circuit it) is realized with current-limiting resistance.For example, when the size of the first signal code Ihck1 is more than predetermined threshold level, first
Resistance-capacitance circuit can be charged to specific voltage by signal code Ihck1.And when comparator receives aforementioned specific voltage, comparator
Switching circuit can be controlled, the first signal code Ihck1 is switched into another electric current comprising current-limiting resistance from the current path of script
Path, to limit the size of the first signal code Ihck1.
The function mode of matrix current adjustment circuit 120a~120n is further illustrated below in conjunction with the 2nd figure to the 4th figure.In order to
It is succinct in narration, it will be illustrated by taking matrix current adjustment circuit 120a as an example.The 2nd figure is please referred to, in gate drive module 103
In manufacture or operation, it may occur between the first clock signal Vhck1 and the signal path of the second clock signal Vhck2
Short circuit (also that is, generating short circuit paths 201).
If without short circuit (also that is, not between the first clock signal Vhck1 and the signal path of the second clock signal Vhck2
There are short circuit paths 201), the waveform of the first signal code Ihck1 can be as shown in Fig. 3.Also that is, in the first signal code
The absolute value of Tp during each pulse of Ihck1, the size of the first signal code Ihck1 only can be more than pre- in the first period T1
Gating threshold value, and it is less than threshold value in the second period T2 and third period T3.
Since the absolute value of the size of the first signal code Ihck1 is all less than predetermined threshold level, electric current in the second period T2
Adjustment circuit 120a is without limitation on the first signal code Ihck1.
On the other hand, if short circuit occurs between the first clock signal Vhck1 and the signal path of the second clock signal Vhck2
The waveform of (also that is, there are short circuit paths 201), the first signal code Ihck1 can be as shown in Fig. 4.Also that is, in the first signal electricity
Flow Tp during each pulse of Ihck1, the absolute value of the size of the first signal code Ihck1 can in the first period T1 and second
All it is more than predetermined threshold level in period T2.
In the case, in the second period T2, if the absolute value of the size of the first signal code Ihck1 is more than pre- gating
The duration of threshold value is more than predetermined time period, and matrix current adjustment circuit 120a can limit the in next third period T3
One signal code Ihck1.
In other words, matrix current adjustment circuit 120a can limit the absolute value of the size of the first signal code Ihck1 less than default
Threshold value, until burst length Tp terminates.Thus, when overcurrent event occurs, over-current protection system 100 can be real
When reduce the size of current that gate drive module 103 born, reduce the risk of 103 damage of gate drive module.
In addition, whenever the corresponding signal code of matrix current adjustment circuit 120a~120n limitations, matrix current adjustment circuit 120a
~120n is notified that overcurrent event occurs for logic circuit 130.And in a frame picture of viewing area 105, if electric current adjustment electricity
The number of overcurrent event occurs for the 120 notification logic circuit 130 of any matrix current adjustment circuit in the 120a~120n of road, and being more than should
Preset times corresponding to matrix current adjustment circuit 120, logic circuit 130 can adjust the statistical value being stored in storage device 140,
With the accumulative totalframes that overcurrent event occurs.
It is worth noting that, the respective preset times of matrix current adjustment circuit 120a~120n, correspond to matrix current adjustment circuit
The type of the respective received signals of 120a~120n.For example, the matrix current adjustment circuit for receiving the first clock signal Vhck1
120a, it is adjusted for receiving the second clock signal Vhck2 matrix current adjustment circuits 120b, for receiving the electric current of fixed voltage Vssg
Circuit 120c and be respectively 32 for receiving the preset times corresponding to the matrix current adjustment circuit 120n of initial pulse signal Vst
It is secondary, 32 times, 1 time and 1 time.
Since the first clock signal Vhck1 has multiple periods in each frame picture, and initial pulse signal Vst is each
There was only a cycle in frame picture, so the preset times (for example, 32 times) corresponding to matrix current adjustment circuit 120a are more than electric current
Preset times (for example, 1 time) corresponding to adjustment circuit 120n.
In other words, in a frame picture of viewing area 105, if 120 received signal of a certain matrix current adjustment circuit is total
Periodicity is more, and the preset times corresponding to a certain matrix current adjustment circuit 120 are also bigger.
And if logic circuit 130 finds that statistical value can judge lock more than frame number (for example, 32 frames), logic circuit 130 is preset
The frame number that overcurrent event occurs for pole drive module 103 is excessive.At this point, logic circuit 130 can control drive module 110 stop it is defeated
Go out all signals for being sent to gate drive module 103.Occur during use thus, can avoid display panel 101
Contingency.For example, electric wire cocks off (electrical fire).
In certain embodiments, what statistical value represented is the continuous totalframes that overcurrent event occurs.If logic circuit 130
Be not received by a certain frame from matrix current adjustment circuit 120a~120n notice (also that is, matrix current adjustment circuit 120a~
There is no limit corresponding signal codes by 120n), statistical value can be zeroed by logic circuit 130, to recalculate generation overcurrent
The continuous totalframes of event.
After 5a figures and 5b figures depict the simplification of overcurrent protection method 500 of an embodiment according to the present invention jointly
Flow chart, wherein overcurrent protection method 500 are suitable for above-mentioned over-current protection system 100.It is succinct in order to what is described, with
Under illustrated by taking matrix current adjustment circuit 120a and 120b as an example.
In the depicted flow chart of 5a figures and 5b figures, the flow being located in the affiliated field of a specific device, i.e. generation
The flow that table is carried out by the specific device.For example, flow of the label in " drive module 110 " field, represents by driving mould
The flow that block 110 is carried out；The flow in " matrix current adjustment circuit 120a " field is marked, then is represented by matrix current adjustment circuit
The flow that 120a is carried out.
In flow s502, drive module 110 exports the first clock signal Vhck1 and the second clock signal Vhck2 respectively
To matrix current adjustment circuit 120a and 120b.Flow s504 is to receive the first clock signal Vhck1 for matrix current adjustment circuit 120a execution,
And execute flow s506 with judge the size of the first signal code Ihck1 of the first clock signal Vhck1 absolute value whether in
Predetermined threshold level is continued above in predetermined time period.
If the first signal code Ihck1 is not in being continued above predetermined threshold level in predetermined time period, electric current adjustment is electric
Road 120a repeats flow s504.On the other hand, if the first signal code Ihck1 is pre- in being continued above in predetermined time period
Gating threshold value, matrix current adjustment circuit 120a then execute flow s508 to limit the first signal stream Ihck1, until the first signal stream
The pulse period of Ihck1 terminates.Also, matrix current adjustment circuit 120a can execute flow s510 with transmit overcurrent event notify to
Logic circuit 130.
Matrix current adjustment circuit 120b executes flow s512 to receive the second clock signal Vhck2, and execute flow s514 with
Judge the absolute value of the size of the second signal electric current Ihck2 of the second clock signal Vhck2 whether in being held in predetermined time period
Continuous is more than predetermined threshold level.
If second signal electric current Ihck2 is not in being continued above predetermined threshold level in predetermined time period, electric current adjustment is electric
Road 120b repeats flow s512.On the other hand, if second signal electric current Ihck2 is pre- in being continued above in predetermined time period
Gating threshold value, matrix current adjustment circuit 120b then execute flow s516 to limit second signal electric current Ihck2, until second signal
The pulse period of electric current Ihck2 terminates.Also, it is logical to transmit overcurrent event that matrix current adjustment circuit 120b can execute flow s518
Know to logic circuit 130.
5b figures are please referred to, logic circuit 130 executes flow s520 and comes from matrix current adjustment circuit 120a or 120b to receive
Overcurrent event notice.Then, logic circuit 130 can execute flow s522, to judge from matrix current adjustment circuit 120a's
It notifies whether number is more than the corresponding preset times of matrix current adjustment circuit 120a (for example, 32 times), and judges to come from electric current tune
Whether the notice number of whole circuit 120b is more than the corresponding preset times of matrix current adjustment circuit 120b (for example, 32 times).
In a frame picture, corresponded to if the notice number from matrix current adjustment circuit 120a is more than matrix current adjustment circuit 120a
Preset times, or the notice number from matrix current adjustment circuit 120b is more than matrix current adjustment circuit 120b default time corresponding
Number, logic circuit 130 then execute flow s524 to adjust statistical value.Thus, which logic circuit 130 is just able to accumulative generation
The totalframes of overcurrent event.
On the other hand, if the notice number from matrix current adjustment circuit 120a is not above matrix current adjustment circuit 120a and corresponds to
Preset times, it is corresponding default that the notice number from matrix current adjustment circuit 120b is also not above matrix current adjustment circuit 120b
Number, logic circuit 130 repeat flow s520.
Then, logic circuit 130 executes flow s526 to judge whether statistical value is more than default frame number.If so, logic is electric
Road 130 can control drive module 110 and execute flow s528, so that drive module 110 stops, output is all to be sent to gate drive
The signal of module 103.If it is not, logic circuit 130 repeats flow s522.
It note that the flow chart of aforementioned 5a figure and 5b figures is the embodiment for the property shown, be not intended to limit this hair
Bright embodiment.
For example, flow s504~s510 can be performed simultaneously with flow s512~s518.
In another example in certain embodiments, logic circuit 130 can first judge that electric current adjusts before executing flow s520
Circuit 120a and 120b whether in a frame picture all there is no limit the first signal code Ihck1 and second signal electric current Ihck2.
Also that is, it is judged that whether gate drive module 103 is no in a frame picture to occur overcurrent event.If so, logic circuit 130
Statistical value can be zeroed.
It can be seen from the above, over-current protection system 100 and overcurrent protection method 500 can prevent display panel 101 because
Excessive electric current (for example, short circuit current) is flowed through for a long time and damages or occur contingency (for example, electric wire cocks off).
Some vocabulary has been used in specification and claim to censure specific element.However, affiliated technology
Has usually intellectual in field, it is to be appreciated that same element may be called with different nouns.Specification and application
The scope of the claims is come with the difference of element functionally as differentiation not in such a way that the difference of title is as element is distinguished
Benchmark."comprising" mentioned by specification and claim is open term, thus should be construed to " include but not
It is defined in ".In addition, " coupling " includes any direct and indirect connection means herein.Therefore, if it is described herein that first element coupling
It is connected to second element, then representing first element can be by being electrically connected or being wirelessly transferred, by the signals connection type such as optical delivery
It is attached directly to second element, or electrical or signal is connected to this second yuan indirectly by other elements or connection means
Part.
The foregoing is merely a prefered embodiment of the invention, all equivalent changes and modifications done according to the claims in the present invention, all
The protection domain of appended claims of the present invention should be belonged to.
Claims (16)
1. a kind of over-current protection system, which is characterized in that be suitable for a display panel, which includes a gate drive
Array and a viewing area, the over-current protection system include：
One drive module, for providing one first drive signal to the gate drive array；
One first matrix current adjustment circuit is coupled between the drive module and the gate drive array, wherein the first electric current tune
Whole circuit is located on the current path of one first signal code of first drive signal；
Wherein, during a pulse of first signal code, if the absolute value of the size of first signal code is persistently more than
One predetermined threshold level and more than a predetermined time period, which limits the size of first signal code
Absolute value is not more than the predetermined threshold level, terminates during the pulse of first signal code.
2. over-current protection system as described in claim 1, which is characterized in that additionally comprise：
One logic circuit, in each frame picture of the viewing area, judge first matrix current adjustment circuit limit this first
Whether the number of signal code is more than a preset times；
Wherein, in each frame picture, if the number that first matrix current adjustment circuit limits first signal code is more than
The preset times, the logic circuit adjust a statistical value, and the totalframes of overcurrent situations occurs with statistics.
3. over-current protection system as claimed in claim 2, which is characterized in that when the statistical value be more than a default frame number, should
Logic circuit, which controls the drive module, to be stopped exporting first drive signal.
4. over-current protection system as claimed in claim 3, which is characterized in that in each frame picture, if first electricity
Adjustment circuit is flowed there is no limit the size of first signal code, which is zeroed the statistical value.
5. over-current protection system as claimed in claim 2, which is characterized in that the drive module provides one second drive signal
To the gate drive array, which additionally comprises：
One second matrix current adjustment circuit is coupled between the drive module and the gate drive array, wherein the second electric current tune
Whole circuit is located on the current path of a second signal electric current of second drive signal；
Wherein, it during the pulse of the second signal electric current, is somebody's turn to do if the absolute value of the size of the second signal electric current is persistently more than
Predetermined threshold level is more than the predetermined time period, which limits the absolute of the size of the second signal electric current
Value is not more than the predetermined threshold level, terminates during the pulse of the second signal electric current.
6. over-current protection system as claimed in claim 5, which is characterized in that in each frame picture, if first electricity
The number that stream adjustment circuit limits first signal code should more than the preset times or second matrix current adjustment circuit limitation
The number of second signal electric current is more than the preset times, which adjusts the statistical value.
7. over-current protection system as claimed in claim 2, which is characterized in that the preset times correspond to the first driving letter
Total periodicity number in each frame picture.
8. over-current protection system as claimed in claim 7, which is characterized in that if first drive signal is for making the lock
The clock signal that multiple shift registers in the drive array of pole sequentially operate, the preset times are equal to 32,
If first drive signal is the initial pulse for triggering the gate drive array when each frame picture starts
Signal, the preset times are equal to 1,
If first drive signal is fixed voltage, which is equal to 1.
9. a kind of overcurrent protection method, which is characterized in that be suitable for a display panel, which includes a gate drive
Array and a viewing area, the overcurrent protection method include：
A drive module is provided, wherein the drive module is for providing one first drive signal to the gate drive array；
One first matrix current adjustment circuit is provided, wherein first matrix current adjustment circuit is coupled to the drive module and the gate drive
Between array, and on the current path of one first signal code of first drive signal；
During the pulse of first signal code, if the absolute value of the size of first signal code is persistently more than a pre- gating
Threshold value is more than a predetermined time period, and the absolute value of the size of first signal code is limited using first matrix current adjustment circuit
No more than the predetermined threshold level, terminate during the pulse of first signal code.
10. overcurrent protection method as claimed in claim 9, which is characterized in that additionally comprise：
Using a logic circuit in each frame picture of the viewing area, judge that first matrix current adjustment circuit limits first letter
Whether the number of number electric current is more than a preset times；
In each frame picture, if the number that first matrix current adjustment circuit limits first signal code is default more than this
Number is adjusted a statistical value using the logic circuit, the totalframes of overcurrent situations is occurred with statistics.
11. overcurrent protection method as claimed in claim 10, which is characterized in that additionally comprise：
When the statistical value is more than a default frame number, controlling the drive module using the logic circuit stops exporting the first driving letter
Number.
12. overcurrent protection method as claimed in claim 11, which is characterized in that adjust the statistical value using the logic circuit
Flow include:
In each frame picture, if there is no limit first signal codes for first matrix current adjustment circuit, logic electricity is utilized
The statistical value is zeroed on road.
13. overcurrent protection method as claimed in claim 10, which is characterized in that the drive module provides one second driving letter
Number to the gate drive array, which additionally comprises：
One second matrix current adjustment circuit is provided, wherein second matrix current adjustment circuit is coupled to the drive module and the gate drive
Between array, and second matrix current adjustment circuit is located on the current path of a second signal electric current of second drive signal；
During the pulse of the second signal electric current, if the absolute value of the size of the second signal electric current is persistently more than the pre- gating
Threshold value is more than the predetermined time period, and the absolute value of the size of the second signal electric current is limited using second matrix current adjustment circuit
No more than the predetermined threshold level, terminate during the pulse of the second signal electric current.
14. overcurrent protection method as claimed in claim 13, which is characterized in that adjust the statistical value using the logic circuit
Flow additionally comprise：
In each frame picture, if the number that first matrix current adjustment circuit limits first signal code is more than this default time
The number that number or second matrix current adjustment circuit limit the second signal electric current is more than the preset times, the logic circuit tune
The whole statistical value.
15. overcurrent protection method as claimed in claim 10, which is characterized in that the preset times correspond to first driving
Total periodicity of the signal in each frame picture.
16. overcurrent protection method as claimed in claim 15, which is characterized in that if first drive signal is for making this
The clock signal that multiple shift registers in gate drive array sequentially operate, the preset times are equal to 32,
If first drive signal is the initial pulse for triggering the gate drive array when each frame picture starts
Signal, the preset times are equal to 1,
If first drive signal is fixed voltage, which is equal to 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW107105655 | 2018-02-14 | ||
| TW107105655A TWI668932B (en) | 2018-02-14 | 2018-02-14 | Over current protection system and over current protection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108682376A true CN108682376A (en) | 2018-10-19 |
| CN108682376B CN108682376B (en) | 2021-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810463410.8A Active CN108682376B (en) | 2018-02-14 | 2018-05-15 | Overcurrent protection system and overcurrent protection method |
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| CN (1) | CN108682376B (en) |
| TW (1) | TWI668932B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021051280A1 (en) * | 2019-09-17 | 2021-03-25 | 京东方科技集团股份有限公司 | Driving control circuit and driving method therefor, and display panel |
| CN113508429B (en) * | 2019-09-17 | 2024-04-16 | 京东方科技集团股份有限公司 | Driving control circuit, driving method thereof and display panel |
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Also Published As
| Publication number | Publication date |
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| TWI668932B (en) | 2019-08-11 |
| CN108682376B (en) | 2021-08-20 |
| TW201935795A (en) | 2019-09-01 |
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