CN105070245A - Static LED display screen driving circuit - Google Patents
Static LED display screen driving circuit Download PDFInfo
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- CN105070245A CN105070245A CN201510459572.0A CN201510459572A CN105070245A CN 105070245 A CN105070245 A CN 105070245A CN 201510459572 A CN201510459572 A CN 201510459572A CN 105070245 A CN105070245 A CN 105070245A
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Abstract
The invention discloses a static LED display screen driving circuit. The static LED display screen driving circuit comprises LED lamps and driving chips. The three driving chips and the three groups of LED lamps form one display unit, each driving chip drives one group of LED lamps, each signal output pin of each driving chip is connected with one LED lamp, the static LED display screen driving circuit further comprises a filtering circuit, the filtering circuit comprises a power supply filtering circuit and a signal filtering circuit, the power supply filtering circuit comprises at least three capacitors with different capacitance values, the signal filtering circuit comprises magnetic beads, the input end of each control signal is connected in series with one magnetic bead, and the data input end and the data output end of each driving chip are each connected in series with one magnetic bead. According to the invention, three-grade capacitance value filtering is employed so that interference of each frequency range can be effectively filtered, and the magnetic beads are used for serial connection with signal input ends and signal output ends so that crosstalk can be effectively filtered, and signal completeness is guaranteed.
Description
Technical field
The invention belongs to electronics applications field, be specifically related to a kind of static LED display screen driving circuit.
Background technology
LED display (LEDpanel): LED is exactly lightemittingdiode, the english abbreviation of light emitting diode, is called for short LED.It is a kind of display mode by controlling semiconductor light-emitting-diode, and its general appearance is exactly be made up of a lot of individual normally red light emitting diode, and the light on and off by lamp show character.Be used for showing the display screen of the various information such as word, figure, image, animation, market, video, video signal.Shenzhen is LED display development & production origin.The manufacturer of current Shenzhen LED display reaches ten thousand, wherein auspicious by Ai Bisen, light, in the leading eldest child such as auspicious, follow-up also have Shenzhen unexpected rival's attitudes such as bright, extra large lamp, continent be bright to be for a long time shortlisted for top ten, and famous brand company price general charged is higher, and mainly handling cost is higher than general enterprises.Current LED display price is rather transparent.
Compared with other giant-screen terminal display, LED display mainly contains following characteristics:
1, brightness is high: the brightness of outdoor LED display screen is greater than 8000mcd/m2, is at present uniquely can the large-scale display terminal of round-the-clock use out of doors; The brightness of indoor LED display is greater than 2000md/m2.
2, the life-span is long: the LED life-span reaches 100, and more than 000 hour (10 years), this parameter generally all refers to designed life, and brightness is dark also calculates.
3, visual angle is large: indoor visual angle can be greater than 160 degree, and outdoor visual angle can be greater than 120 degree.The size at visual angle depends on the shape of LED light emitting diode.
4, screen area is changeable, little of less than a square meter, greatly then can reach hundreds of, thousands of square meter; 5, easy and computer interface, support software enriches.
Application number is 201310629925.8, the applying date be on Dec 2nd, 2013 Guangdong Weichuang Shixun Science and Technology Co., Ltd disclose a kind of LED display driving circuit, it comprises LED and constant current source, the LED of one or more constant current source and respective amount is packaged together and forms integrated lamp group, constant current source in lamp group and LED are electrically connected in the proportioning mode of 1:1, also be packaged with a constant current source controller be connected with one or more constant current source in lamp group, this constant current source controller is provided with external interface.In this invention, the LED of one or more constant current source and respective amount and constant current source controller are packaged together and form integrated lamp group, one or more LED and one or more constant current source is contained in lamp group, encapsulation degree is high, multiple lamp group together just can highdensity LED display, makes this invention can be applicable to high density LED display.
Above-mentioned patent solves the application of high density LED display, but, the maximum voltage born due to red LED lamp and working current and blue, green LED lamp is inconsistent, therefore, adopts above-mentioned driving circuit, easily cause red LED lamp short for serviceable life, the phenomenon at easy dead point, and above-mentioned patent is the problem of the scan screen solved, in the prior art in some static LED display screens, often due to external interference, cause the problem that dead point or screen dodge.
Summary of the invention
Technical matters to be solved by this invention is: provide a kind of static LED display screen driving circuit, solves static LED display screen in prior art and is disturbed the problem producing dead point or screen sudden strain of a muscle.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of static LED display screen driving circuit, comprise LED and driving chip, three driving chip and three groups of LED form a display unit, each driving chip drives one group of LED, three groups of LED are respectively one group of red LED lamp, one group of green LED lamp, one group of blue led lamp, each signal output pin of driving chip is respectively connected with a LED, wherein, to connect between red LED lamp with power supply a resistance, three driving chip are sequentially connected in series, also comprise filtering circuit, described filtering circuit comprises electric source filter circuit and signal filter circuit, wherein, electric source filter circuit comprises the different electric capacity of at least three capacitances, signal filter circuit comprises magnetic bead, the input end of each control signal is all connected a magnetic bead, each group data input pin of driving chip and data output end are respectively connected a magnetic bead.
Each driving chip includes 8 or 16 drive singal output pins, 3 control signal pin, 1 data-signal input pin, 1 data-signal output pin, wherein, 3 control signal pin are respectively sheet and select input pin, latch signal pin, clock signal pin, wherein, the data-signal input pin of three driving chip, output pin are sequentially connected in series.
In described three electric capacity, capacitance difference is between any two at least two orders of magnitude.
The capacitance of described three electric capacity is respectively 10uF, 0.1uF, 0.001uF.
The resistance of described resistance is 50 Europe, Europe ~ 100.
Described driving chip is MBI5024 or MBI5167 that scientific & technical corporation is built up in Taiwan.
Described LED is paster LED lamp or plug-in unit LED.
Compared with prior art, the present invention has following beneficial effect:
1, three grades of capacitance filtering are adopted, can the interference of effective each frequency range of filtering, adopt magnetic bead to be connected in series to signal input output end, can effectively filtering crosstalk, the integrality of guarantee signal.
2, by a resistance of connecting in red LED lamp set, effectively play the effect of dividing potential drop, reduce the impact to red LED lamp, increase serviceable life, effectively reduce the generation of dead point rate.
The resistance of 3, connecting between 50 Europe, Europe ~ 100, effectively can play the effect of dividing potential drop, does not affect the brightness of normal red LED lamp simultaneously.
4, MBI5024 chip is that a performance that accumulation science and technology in Taiwan controls to release for LED display is specially high, the chip that cost is low, and the LED display control for the type can realize its display demand, reduces the cost of whole screen simultaneously.
Accompanying drawing explanation
Fig. 1 is driving circuit figure of the present invention.
Embodiment
Below in conjunction with accompanying drawing, structure of the present invention and the course of work are described further.
As shown in Figure 1, a kind of static LED display screen driving circuit, comprise LED and driving chip, three driving chip and three groups of LED form a display unit, each driving chip drives one group of LED, three groups of LED are respectively one group of red LED lamp, one group of green LED lamp, one group of blue led lamp, each signal output pin of driving chip is respectively connected with a LED, wherein, to connect between red LED lamp with power supply a resistance, three driving chip are sequentially connected in series, also comprise filtering circuit, described filtering circuit comprises electric source filter circuit and signal filter circuit, wherein, electric source filter circuit comprises the different electric capacity of at least three capacitances, signal filter circuit comprises magnetic bead, the input end of each control signal is all connected a magnetic bead, each group data input pin of driving chip and data output end are respectively connected a magnetic bead.
Each driving chip includes 8 or 16 drive singal output pins, 3 control signal pin, 1 data-signal input pin, 1 data-signal output pin, wherein, 3 control signal pin are respectively sheet and select input pin, latch signal pin, clock signal pin, wherein, the data-signal input pin of three driving chip, output pin are sequentially connected in series.
In described three electric capacity, capacitance difference is between any two at least two orders of magnitude.
The capacitance of described three electric capacity is respectively 10uF, 0.1uF, 0.001uF.
The resistance of described resistance is 50 Europe, Europe ~ 100.
Described driving chip is MBI5024 or MBI5167 that scientific & technical corporation is built up in Taiwan.
Described LED is paster LED lamp or plug-in unit LED.
This chip has following features:
MBI5024 utilizes up-to-date PrecisionDrive technology, and aim at the drive IC of LED display panel design, the CMOS bit shift register that it is built-in and bolt-lock function, can convert the input data of serial to parallel output data formats.
The input voltage range value of MBI5024 is 3.3 volts to 5 volts, provides 16 current sources, 3-45mA can be provided to determine the magnitude of current with driving LED in each output stage; And in single IC the current difference of output channel be less than ± 3%; Output current difference between many IC is less than ± and 6%; Electric current, along with output terminal withstand voltage (VDS) change, is controlled in every volt 0.1%; And electric current is subject to service voltage (VDD), the change of environment temperature is also controlled in 1%.User can via selecting the RSET of different resistance to adjust the size of current of each output stage of MBI5024, by this mechanism, and user can the luminosity of accurately control LED.
The design of MBI5024 ensures that its output stage can be withstand voltage 17 volts, therefore can be connected in series multiple LED at each output terminal.
In addition, MBI5024 also provides the high clock frequency of 25MHz to meet system to the demand in mass data transmission.
Control element in LED display adopts MBI5024 control chip, MBI5024 chip is that a performance that accumulation science and technology in Taiwan controls to release for LED display is specially high, the chip that cost is low, LED display for the type controls to realize its display demand, reduces the cost of whole screen simultaneously.
The pin of MBI5024 is described as follows table:
This chip main lift display screen uniformity coefficient of MBI5024, and tolerate that larger LED luminance difference is to reduce manufacturing cost, simultaneously because current accuracy improves, larger LED luminance error can be tolerated, contribute to manufacturer and reduce LED purchase cost.
Claims (7)
1. a static LED display screen driving circuit, comprise LED and driving chip, three driving chip and three groups of LED form a display unit, each driving chip drives one group of LED, three groups of LED are respectively one group of red LED lamp, one group of green LED lamp, one group of blue led lamp, each signal output pin of driving chip is respectively connected with a LED, wherein, to connect between red LED lamp with power supply a resistance, three driving chip are sequentially connected in series, it is characterized in that: also comprise filtering circuit, described filtering circuit comprises electric source filter circuit and signal filter circuit, wherein, electric source filter circuit comprises the different electric capacity of at least three capacitances, signal filter circuit comprises magnetic bead, the input end of each control signal is all connected a magnetic bead, each group data input pin of driving chip and data output end are respectively connected a magnetic bead.
2. static LED display screen driving circuit according to claim 1, it is characterized in that: each driving chip includes 8 or 16 drive singal output pins, 3 control signal pin, 1 data-signal input pin, 1 data-signal output pin, wherein, 3 control signal pin are respectively sheet and select input pin, latch signal pin, clock signal pin, wherein, the data-signal input pin of three driving chip, output pin are sequentially connected in series.
3. static LED display screen driving circuit according to claim 1, is characterized in that: in described three electric capacity, capacitance difference is between any two at least two orders of magnitude.
4. static LED display screen driving circuit according to claim 4, is characterized in that: the capacitance of described three electric capacity is respectively 10uF, 0.1uF, 0.001uF.
5. static LED display screen driving circuit according to claim 1, is characterized in that: the resistance of described resistance is 50 Europe, Europe ~ 100.
6. static LED display screen driving circuit according to claim 1, is characterized in that: described driving chip is MBI5024 or MBI5167 that scientific & technical corporation is built up in Taiwan.
7. static LED display screen driving circuit according to claim 1, is characterized in that: described LED is paster LED lamp or plug-in unit LED.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510459572.0A CN105070245A (en) | 2015-07-31 | 2015-07-31 | Static LED display screen driving circuit |
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| CN201510459572.0A CN105070245A (en) | 2015-07-31 | 2015-07-31 | Static LED display screen driving circuit |
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| CN105070245A true CN105070245A (en) | 2015-11-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112444963A (en) * | 2019-08-30 | 2021-03-05 | 成都理想境界科技有限公司 | Light source driving circuit and display module |
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| CN203038639U (en) * | 2012-12-18 | 2013-07-03 | 深圳市大族元亨光电股份有限公司 | Led pixel lamp circuit |
| CN104079165A (en) * | 2014-07-11 | 2014-10-01 | 湖南新亚胜科技发展有限公司 | Display screen with electromagnetic interference suppression function |
| CN204119629U (en) * | 2014-11-07 | 2015-01-21 | 四川嘉汇电子科技有限公司 | Develop the color adjustable LED control circuit |
| CN204131769U (en) * | 2014-11-07 | 2015-01-28 | 四川嘉汇电子科技有限公司 | Export stable constant current LED power supplies |
| CN104347033A (en) * | 2014-11-20 | 2015-02-11 | 无锡科思电子科技有限公司 | LED (Light-Emitting Diode) display screen driving circuit |
| CN104470147A (en) * | 2014-12-22 | 2015-03-25 | 福建鸿博光电科技有限公司 | LED circuit |
| CN104661408A (en) * | 2015-02-10 | 2015-05-27 | 深圳市佳比泰电子科技有限公司 | LED dimming circuit and LED lamp |
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2015
- 2015-07-31 CN CN201510459572.0A patent/CN105070245A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203038639U (en) * | 2012-12-18 | 2013-07-03 | 深圳市大族元亨光电股份有限公司 | Led pixel lamp circuit |
| CN104079165A (en) * | 2014-07-11 | 2014-10-01 | 湖南新亚胜科技发展有限公司 | Display screen with electromagnetic interference suppression function |
| CN204119629U (en) * | 2014-11-07 | 2015-01-21 | 四川嘉汇电子科技有限公司 | Develop the color adjustable LED control circuit |
| CN204131769U (en) * | 2014-11-07 | 2015-01-28 | 四川嘉汇电子科技有限公司 | Export stable constant current LED power supplies |
| CN104347033A (en) * | 2014-11-20 | 2015-02-11 | 无锡科思电子科技有限公司 | LED (Light-Emitting Diode) display screen driving circuit |
| CN104470147A (en) * | 2014-12-22 | 2015-03-25 | 福建鸿博光电科技有限公司 | LED circuit |
| CN104661408A (en) * | 2015-02-10 | 2015-05-27 | 深圳市佳比泰电子科技有限公司 | LED dimming circuit and LED lamp |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112444963A (en) * | 2019-08-30 | 2021-03-05 | 成都理想境界科技有限公司 | Light source driving circuit and display module |
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Application publication date: 20151118 |
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