CN108682383A - A kind of the protection circuit and its control method of LED display - Google Patents
A kind of the protection circuit and its control method of LED display Download PDFInfo
- Publication number
- CN108682383A CN108682383A CN201810616516.7A CN201810616516A CN108682383A CN 108682383 A CN108682383 A CN 108682383A CN 201810616516 A CN201810616516 A CN 201810616516A CN 108682383 A CN108682383 A CN 108682383A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000000630 rising effect Effects 0.000 claims abstract description 4
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 230000010355 oscillation Effects 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 239000000872 buffer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/04—Display protection
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of El Displays (AREA)
- Led Devices (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses the protection circuits and its control method of a kind of LED display; it protects circuit to be set between signal input circuit and horizontal drive circuit, which includes the effective double D trigger of the rising edge with set and reset, one-shot multivibrator and logic gates；The output end of d type flip flop and the input terminal of oscillator are electrically connected, and the output end of oscillator and the input terminal of logic gates are electrically connected；The clock signal input terminal of d type flip flop and the first data signal input are electrically connected with signal input circuit, the data output end of logic gates and the input terminal of horizontal drive circuit are electrically connected, and the second data signal input and the signal input circuit of logic gate are electrically connected；Oscillator is electrically connected with the timing circuit of resistance and capacitance composition oscillator.Circuit design of the present invention is simple, can realize the full guard of horizontal-drive signal.
Description
Technical field
The present invention relates to LED display protection technique field, the protection circuit of especially a kind of LED display and its control
Method.
Background technology
LED display was using more and more extensive, increasing as especially indoor small spacing LED displays product is even more broken out in recent years
Long, application field is extensive, but design difficulty is really continuously increased, and promotes new technology and new material to constantly bring forth new ideas appearance, with green wood
The use of material and new technology also exposes many new problems, so that display screen is produced many uncertain problems, so necessary
It fundamentally solves these problems, to reduce risk.
As shown in Figure 1, stimulus part includes all drive signals needed for display module（As R G B data, row drive
Dynamic signal, row drive signal and other function signals etc.）And signal buffer circuit part, wherein horizontal-drive signal are former according to display
The difference of reason has parallel decoding signal and serial horizontal-drive signal, and serial horizontal-drive signal part, serial row are mainly discussed here
Drive signal generally comprises data DATA1 tri- groups of data of clocks CLK and data DATA2；Serial row after signal buffer drives
Dynamic signal directly controls horizontal drive circuit and carries out to control the public foot break-make of LED（General common-anode LED anode is public
Foot, common cathode LED are that cathode is public foot）；Binding signal buffers the conducting of the column drive circuit of rank rear drive signal driving, from
And realize the light on and off of LED particle.Here it is the basic display principles that serial decoding scans LED display display module.
The deficiency for prior art disadvantage/need to solve：
1, according to the difference of horizontal drive circuit, horizontal-drive signal DATA1 CLK each signal definitions of DATA2 it is different, the work(of realization
Can be different, once having some signal or multiple signals are abnormal causes the display of LED display module image abnormal.
If 2, certain signals are abnormal for a long time, just open row pipe, high current exports for a long time, can lead to row circuit
It burns or even display module is on fire, endanger public security.
Invention content
The technical problem to be solved by the present invention is in view of the above shortcomings of the prior art, provide a kind of guarantor of LED display
Protection circuit and its control method.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of protection circuit of LED display,
It is set between signal input circuit and horizontal drive circuit, which includes that the rising edge with set and reset is effectively double
D type flip flop, one-shot multivibrator and logic gates；The output end of d type flip flop and the input terminal of oscillator electrically connect
It connects, the output end of oscillator and the input terminal of logic gates are electrically connected；The clock signal input terminal of d type flip flop and the first number
It is electrically connected according to signal input part and signal input circuit, the data output end of logic gates and the input terminal of horizontal drive circuit
It is electrically connected, the second data signal input and the signal input circuit of logic gate are electrically connected；Oscillator is electrically connected with electricity
The timing circuit of resistance and capacitance composition oscillator.
In above-mentioned technical proposal, the logic gates is OR circuit or is AND gate circuit.
In above-mentioned technical proposal, it is in series between the output end of the oscillator and the input terminal of logic gates and guarantor is isolated
Protect resistance.
In above-mentioned technical proposal, second data signal input is in series with pull-up resistor.
In order to further solve above-mentioned technical problem, a kind of control method of the protection circuit of LED display is additionally provided,
A kind of protection circuit of its application such as above-mentioned LED display；Signal input circuit to d type flip flop send the first data-signal and
Clock signal, d type flip flop send different level signals to oscillator according to the case where the first data-signal and clock signal；When
When the first data-signal and normal clock signal, d type flip flop exports pulse signal identical with the first data-signal to oscillation
Device when oscillator receives pulse signal, exports a low level signal；Or when the first data-signal and clock signal have all the way or
When two-way is in abnormal conditions, d type flip flop exports high level signal, the high level signal that oscillator receives, and the high level
The time of signal has been more than the duration of oscillation of the setting of timing circuit, then exports a high level signal；Logic gates receives the
Two data-signals and the signal of oscillator output, output third data-signal to horizontal drive circuit, when oscillator exports one
When low level signal, third data-signal is identical as the second data-signal sequential, and horizontal drive circuit is made to work normally, or works as and shake
When swinging device one high level signal of output, third data-signal is a long high level signal, horizontal drive circuit output shutdown.
The beneficial effects of the invention are as follows：
1, logic is simply readily appreciated that, design engineer's design is simple；
2, circuit is simple, and cost increases seldom；
3, it realizes the full guard of serial horizontal-drive signal, ensures that LED display is shown normally；
When 4, ensuring arbitrary horizontal-drive signal exception, horizontal drive circuit will not be opened for a long time, will not cause row circuit burnout, greatly
It is big to reduce risk.
Description of the drawings
Fig. 1 is the overall structure diagram of the prior art；
Fig. 2 is the overall structure diagram of the present invention；
Fig. 3 is the application schematic diagram of the present invention.
Specific implementation mode
The invention will now be described in further detail with reference to the accompanying drawings.
As Figure 2-3, the protection circuit of a kind of LED display, is set to signal input circuit and horizontal drive circuit
Between, which includes the effective double D trigger U1 of the rising edge with set and reset（Such as 74HC74）, monostable multi-resonant
Swing device U2（Such as 74HC123）And logic gates U3；The output end of d type flip flop and the input terminal of oscillator are electrically connected, and are shaken
The input terminal of the output end and logic gates that swing device is electrically connected；The clock signal input terminal of d type flip flop and the first data letter
Number input terminal is electrically connected with signal input circuit, and the data output end of logic gates and the input terminal of horizontal drive circuit are electrical
Connection, the second data signal input and the signal input circuit of logic gate are electrically connected；Oscillator is electrically connected with resistance RE1
The timing circuit of oscillator is formed with capacitance C117.The logic gates is OR circuit such as 74HC32, or is electric with door
Road such as 74HC08.Insulation blocking resistance RA1 is in series between the output end of the oscillator and the input terminal of logic gates.Institute
It states the second data signal input and is in series with pull-up resistor RA2.
A kind of control method of the protection circuit of LED display, signal input circuit send the first data letter to d type flip flop
Number DATA1 and clock signal clk, d type flip flop according to the case where the first data-signal DATA1 and clock signal clk to oscillator
Send different level signals；As the first data-signal DATA1 and normal clock signal clk, d type flip flop output and first
The identical pulse signals of data-signal DATA1 are to oscillator, when oscillator receives pulse signal, export a low level signal；Or
Person is such as drawn high for a long time when the first data-signal DATA1 and clock signal clk have all the way or two-way is in abnormal conditions
Either drag down either the first data-signal DATA1 or clock signal clk sequential go wrong or no signal input when,
D type flip flop output high level signal, the high level signal that oscillator receives, and the time of the high level signal have been more than timing
The duration of oscillation of the setting of circuit then exports a high level signal；Logic gates receives the second data-signal DATA2 and shakes
Swing the signal of device output, output third data-signal DATA3 to horizontal drive circuit, when oscillator exports a low level signal
When, third data-signal DATA3 is identical as the second data-signal DATA2 sequential, and horizontal drive circuit is made to work normally, or works as and shake
When swinging device one high level signal of output, third data-signal DATA3 is a long high level signal, and horizontal drive circuit is utilized to believe
When number long-time is unchanged, the characteristic for exporting shutdown realizes protection purpose.
Above embodiment is merely illustrative and not limiting to the invention, therefore all according to described in present patent application range
The equivalent change or modification done of method, be included within the scope of present patent application.
Claims (5)
1. a kind of protection circuit of LED display, it is characterised in that：It is set between signal input circuit and horizontal drive circuit,
The protection circuit includes the effective double D trigger of the rising edge with set and reset, one-shot multivibrator and logic gate electricity
Road；The output end of d type flip flop and the input terminal of oscillator are electrically connected, the output end of oscillator and the input terminal of logic gates
It is electrically connected；The clock signal input terminal of d type flip flop and the first data signal input are electrically connected with signal input circuit, are patrolled
The data output end of volume gate circuit and the input terminal of horizontal drive circuit are electrically connected, the second data signal input of logic gate with
Signal input circuit is electrically connected；Oscillator is electrically connected with the timing circuit of resistance and capacitance composition oscillator.
2. a kind of protection circuit of LED display according to claim 1, it is characterised in that：The logic gates is
OR circuit or be AND gate circuit.
3. a kind of protection circuit of LED display according to claim 1, it is characterised in that：The output of the oscillator
It is in series with insulation blocking resistance between end and the input terminal of logic gates.
4. a kind of protection circuit of LED display according to claim 1, it is characterised in that：Second data-signal
Input terminal is in series with pull-up resistor.
5. a kind of control method of the protection circuit of LED display, it is characterised in that：It is any using such as the claims 1-4
A kind of protection circuit of the LED display；Signal input circuit sends the first data-signal and clock letter to d type flip flop
Number, d type flip flop sends different level signals to oscillator according to the case where the first data-signal and clock signal；When the first number
It is believed that number and clock signal it is normal when, d type flip flop exports identical with the first data-signal pulse signal to oscillator, vibrates
When device receives pulse signal, a low level signal is exported；Or when the first data-signal and clock signal have all the way or at two-way
When abnormal conditions, d type flip flop exports high level signal, the high level signal that oscillator receives, and the high level signal
Time has been more than the duration of oscillation of the setting of timing circuit, then exports a high level signal；Logic gates receives the second data
Signal and the signal of oscillator output, output third data-signal to horizontal drive circuit, when oscillator exports a low level
When signal, third data-signal is identical as the second data-signal sequential, and horizontal drive circuit is made to work normally, or when oscillator is defeated
When going out a high level signal, third data-signal is a long high level signal, horizontal drive circuit output shutdown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810616516.7A CN108682383A (en) | 2018-06-15 | 2018-06-15 | A kind of the protection circuit and its control method of LED display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810616516.7A CN108682383A (en) | 2018-06-15 | 2018-06-15 | A kind of the protection circuit and its control method of LED display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108682383A true CN108682383A (en) | 2018-10-19 |
Family
ID=63811111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810616516.7A Pending CN108682383A (en) | 2018-06-15 | 2018-06-15 | A kind of the protection circuit and its control method of LED display |
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| Country | Link |
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| CN (1) | CN108682383A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130515A (en) * | 2019-12-23 | 2020-05-08 | 广东美的白色家电技术创新中心有限公司 | Multi-input protection circuit, input control circuit and electronic equipment |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4280220A (en) * | 1979-09-17 | 1981-07-21 | Fairchild Camera & Instrument Corp. | Electronic testing system |
| EP0441709A2 (en) * | 1990-02-07 | 1991-08-14 | Copal Company Limited | Semiconductor laser driving circuit |
| JPH0947077A (en) * | 1995-07-28 | 1997-02-14 | Samsung Electron Co Ltd | Logic circuit for sensorless motor driving circuit |
| CN2329128Y (en) * | 1997-12-26 | 1999-07-14 | 北京市英和科技有限责任公司 | Display screen of radio paging |
| KR20030081222A (en) * | 2003-08-30 | 2003-10-17 | 빛샘전자주식회사 | Light emitting diode driving control apparatus for displaying video signal |
| CN1784930A (en) * | 2003-05-07 | 2006-06-07 | 皇家飞利浦电子股份有限公司 | Current control method and circuit for light emitting diodes |
| CN1987971A (en) * | 2005-12-21 | 2007-06-27 | 三星电子株式会社 | Image display apparatus |
| CN101217021A (en) * | 2007-01-05 | 2008-07-09 | 三星电子株式会社 | Organic light emitting display device and method of driving the same |
| CN101222805A (en) * | 2007-12-20 | 2008-07-16 | 北京中星微电子有限公司 | Method for multi-string LED time-sharing regulation and driving mechanism using the same |
| CN101285426A (en) * | 2007-04-09 | 2008-10-15 | 山东申普汽车控制技术有限公司 | Method for combined pulse spectrum controlling engine idle speed |
| CN102970004A (en) * | 2012-11-07 | 2013-03-13 | 中国船舶重工集团公司第七二三研究所 | Pulse signal transmission method |
| CN103578398A (en) * | 2012-07-26 | 2014-02-12 | 三星显示有限公司 | Safety driving system of display device and safety driving method of display device |
| CN105548681A (en) * | 2016-02-02 | 2016-05-04 | 林纪秋 | Method and device for measurement of power factors |
| CN208400465U (en) * | 2018-06-15 | 2019-01-18 | 东莞阿尔泰显示技术有限公司 | A kind of protection circuit of LED display |
-
2018
- 2018-06-15 CN CN201810616516.7A patent/CN108682383A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4280220A (en) * | 1979-09-17 | 1981-07-21 | Fairchild Camera & Instrument Corp. | Electronic testing system |
| EP0441709A2 (en) * | 1990-02-07 | 1991-08-14 | Copal Company Limited | Semiconductor laser driving circuit |
| JPH0947077A (en) * | 1995-07-28 | 1997-02-14 | Samsung Electron Co Ltd | Logic circuit for sensorless motor driving circuit |
| CN2329128Y (en) * | 1997-12-26 | 1999-07-14 | 北京市英和科技有限责任公司 | Display screen of radio paging |
| CN1784930A (en) * | 2003-05-07 | 2006-06-07 | 皇家飞利浦电子股份有限公司 | Current control method and circuit for light emitting diodes |
| KR20030081222A (en) * | 2003-08-30 | 2003-10-17 | 빛샘전자주식회사 | Light emitting diode driving control apparatus for displaying video signal |
| CN1987971A (en) * | 2005-12-21 | 2007-06-27 | 三星电子株式会社 | Image display apparatus |
| CN101217021A (en) * | 2007-01-05 | 2008-07-09 | 三星电子株式会社 | Organic light emitting display device and method of driving the same |
| CN101285426A (en) * | 2007-04-09 | 2008-10-15 | 山东申普汽车控制技术有限公司 | Method for combined pulse spectrum controlling engine idle speed |
| CN101222805A (en) * | 2007-12-20 | 2008-07-16 | 北京中星微电子有限公司 | Method for multi-string LED time-sharing regulation and driving mechanism using the same |
| CN103578398A (en) * | 2012-07-26 | 2014-02-12 | 三星显示有限公司 | Safety driving system of display device and safety driving method of display device |
| CN102970004A (en) * | 2012-11-07 | 2013-03-13 | 中国船舶重工集团公司第七二三研究所 | Pulse signal transmission method |
| CN105548681A (en) * | 2016-02-02 | 2016-05-04 | 林纪秋 | Method and device for measurement of power factors |
| CN208400465U (en) * | 2018-06-15 | 2019-01-18 | 东莞阿尔泰显示技术有限公司 | A kind of protection circuit of LED display |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130515A (en) * | 2019-12-23 | 2020-05-08 | 广东美的白色家电技术创新中心有限公司 | Multi-input protection circuit, input control circuit and electronic equipment |
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