CN109410830A - A kind of LED display driving circuit - Google Patents
A kind of LED display driving circuit Download PDFInfo
- Publication number
- CN109410830A CN109410830A CN201811570451.3A CN201811570451A CN109410830A CN 109410830 A CN109410830 A CN 109410830A CN 201811570451 A CN201811570451 A CN 201811570451A CN 109410830 A CN109410830 A CN 109410830A
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- Prior art keywords
- signal
- driving chip
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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
- G09G3/22—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]
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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 Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention proposes a kind of LED display driving circuit, including signal input interface, line driving chip, column driving chip, LED row array and LED array array, signal input interface is used to connect the control signal of external circuit offer；Line driving chip is connected with signal input interface, and the control signal for receiving signal input interface offer, output control signal is transported to the column driving chip being connected after enhanced processing, and latch signal, clock signal and data-conversion signal for receiving line driving chip output, output control signal includes column driving signal after the column driving chip enhanced processing；LED row array is connected with line driving chip, and receives horizontal-drive signal；LED array array is used to receive the column driving signal of column driving chip output.LED display driving circuit proposed by the present invention, circuit level is high, and reliable performance is stablized, easy to maintain, can reduce the production cost of LED display driving circuit.
Description
Technical field
The present invention relates to a kind of LED display technical fields, more specifically, being related to a kind of LED display driving circuit.
Background technique
LED display (LED display) is made of LED module panel small one by one, for showing text, figure
The equipment of the various information such as picture, video, video signal.Why in widespread attention LED display is and is rapidly developed, and is
It is inseparable with advantage possessed by itself.These advantages sum up: brightness is high, operating voltage is low, small power consumption, large size
Change, the service life is long, impact resistance and performance are stablized.The development prospect of LED is extremely wide, just towards more high brightness, more high weather resistance,
Higher luminous density, higher uniformity of luminance, reliability, panchromaticization direction are developed.
Common LED display is divided into single double-colored and colorful display screen, but its driving circuit mostly uses greatly multiple circuits
Combination is completed, and causes circuit level lower in this way, reliability is poor, and system is unstable, and cost is excessively high and loses and strives power unexpectedly.
Summary of the invention
The present invention provides a kind of LED display driving circuit, it is intended to solve LED display driving circuit mistake in the prior art
Cause integrated level low, reliability is poor, the problem that system is unstable and cost is excessively high more.In order to overcome the above problems, of the invention
It is high to provide a kind of integrated level, more convenient, the lower LED display driving circuit of later maintenance cost is installed.
To realize the above technical purpose, the technical scheme is that
The invention discloses a kind of LED display driving circuits, comprising: signal input interface, line driving chip, column driving
Chip, LED row array and LED array array,
The signal input interface is used to connect the control signal of external circuit offer, and the control signal includes enabled letter
Number OE_I, row signal A_I, row signal B_I, latch signal LE_I, clock signal clk _ I and data-signal DA_I；
The line driving chip is connected with the signal input interface, and provides for receiving the signal input interface
Enable signal OE_I, row signal A_I, row signal B_I, latch signal LE_I, clock signal clk _ I and data-signal DA_I,
After enhanced processing output control signal include: enable signal OE_O, row signal A_O, row signal B_O, latch signal LE_O, when
Clock signal CLK_O, data-conversion signal/DA_O, 128 bit shift data-signal DA128O and horizontal-drive signal OUT1~OUT4；
The column driving chip is connected with the line driving chip, and the lock for receiving the line driving chip output
Signal LE_O, clock signal clk _ O and data-conversion signal/DA_O are deposited, control is exported after the column driving chip enhanced processing
Signal includes column driving signal；
The LED row array is connected with the line driving chip, and the row driving for receiving line driving chip output
Signal OUT1~OUT4；
LED array array is connected with the column driving chip, and the column driving signal for receiving the output of column driving chip.
Further, the LED display driving circuit further includes signal output interface, the signal output interface and institute
It states line driving chip to be connected, and enable signal OE_O, row signal A_O, row letter for receiving the line driving chip output
Number B_O, latch signal LE_O, clock signal clk _ O, and the above-mentioned signal received is transported to next stage drive circuit.
Further, the column driving chip includes being sequentially connected IC2~IC9 totally 8 pieces of chips, wherein each chip is defeated
Enter end for receive adjacent connection a upper chip export shifted data signal SDI through processing amplification after export carry digit it is believed that
Number SDO and the next chip input terminal for being transported to adjacent connection.
Further, the column driving chip is 5020.
Further, the LED row array is made of multiple LED lamp beads
Further, the LED array array is made of multiple LED lamp beads.
The present invention provides a kind of LED display driving circuit, the beneficial effect is that:
Middle LED display driving circuit, which is different from the prior art, excessively causes integrated level low, and reliability is poor, and system is unstable
It is fixed, the problem that maintenance difficulties are big and cost is excessively high.A kind of LED display driving circuit provided by the invention has integrated level height,
Install more convenient, later maintenance is relatively easy to, and reduces production cost, therefore have very big economic value.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of LED display driving circuit of the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In conjunction with Fig. 1, the specific embodiment that the present invention will be described in detail, but technical solution is not limited in any way.
The embodiment of the present invention, in a kind of structure of LED display driving circuit, comprising:
Signal input interface 10, line driving chip 20, column driving chip 30, LED row array 40 and LED array array 50,
The signal input interface 10 is used to connect the control signal of external circuit offer, and the control signal includes enabled
Signal OE_I, row signal A_I, row signal B_I, latch signal LE_I, clock signal clk _ I and data-signal DA_I；
The line driving chip 20 is connected with the signal input interface 10, and for receiving the signal input interface
10 enable signal OE_I, row signal A_I, row signal B_I, latch signal LE_I, clock signal clk _ I and the data-signals provided
DA_I, output control signal includes: enable signal OE_O, row signal A_O, row signal B_O, latch signal after enhanced processing
LE_O, clock signal clk _ O, data-conversion signal/DA_O, 128 bit shift data-signal DA128O and horizontal-drive signal OUT1
~OUT4；
The column driving chip 30 is connected with the line driving chip 20, and defeated for receiving the line driving chip 20
Latch signal LE_O, clock signal clk _ O and data-conversion signal/DA_O out, after 30 enhanced processing of column driving chip
Output control signal includes column driving signal；
The LED row array 40 is connected with the line driving chip 20, and for receiving the output of line driving chip 20
Horizontal-drive signal OUT1~OUT4；
LED array array 50 is connected with the column driving chip 20, and the column for receiving the output of column driving chip 30 drive
Dynamic signal.
LED display driving circuit further includes signal output interface 60, and the signal output interface 60 drives with the row
Chip 20 is connected, and for receiving enable signal OE_O, the row signal A_O, row signal B_ that the line driving chip 20 exports
O, latch signal LE_O, clock signal clk _ O, and the above-mentioned signal received is transported to next stage line driving chip, it carries out
The relaying of signal.
Column driving chip 30 includes being sequentially connected IC2~IC9 totally 8 pieces of chips, wherein the input terminal of each chip is for connecing
The shifted data signal SDI for receiving the upper chip output of adjacent connection exports shifted data signal SDO and defeated after processing amplification
It is sent to next chip input terminal of adjacent connection.
30 model constant-current driven chip 5020 of column driving chip.
LED row array 40 is made of multiple LED lamp beads.
LED array array 50 is made of multiple LED lamp beads.
It further illustrates:
The line driving chip is the core chips for realizing technical solution of the present invention, which drives electricity for MOS
Road, power MOS circuit, delay protection circuit, signal amplifier, reverse signal amplifier and 128 bit shift data amplifiers are more
Kind functional module is integrated on the same chip, reduces the chip used quantity of circuit, reduces the cost of driving circuit.
The pin function of the line driving chip is as shown in the table:
It further explains:
1, IC1, IC2 ... IC9 are shared in the LED display driving circuit in the technical program, and totally 9 chips form, wherein
IC1 is line driving chip, and totally 8 chips are column driving chip to IC2~IC9.
2, LED display driving circuit further includes two signaling interfaces, and one is signal input interface, another is signal
Output interface, signal output interface are connected to the signal input interface of next LED display driving circuit by connecting line.
3, LED display driving circuit can drive 512 LED lamp beads to shine.
4, the core chips in the technical program is line driving chip IC1, and the received external signal of signal input interface connects
Enter line driving chip IC1, is handled by line driving chip IC1, signal is output to column driving chip IC2~IC9 and signal is defeated
Outgoing interface.
5, the technical program realizes LED drive unit plate " break signal resumes " on LED display or is referred to as " to break to shield and continue
Pass " function.In prior art LED display, if column driving chip IC2~IC9 have in totally 8 chips any one or
One or more wafer damage will lead to the LED unit plate whole signal interruption of subsequent all cascades, cause subsequent all LED mono-
First plate is not shown.In the LED display of the technical program, as long as line driving chip IC1 is not damaged, other column driving chips IC2
The damage that any core is levied in~IC9 does not influence the normal display of subsequent LED unit plate.One LED display is usually by several
Hundred are constituted to thousands of module unit plates, and the technical program can greatly reduce the maintenance and maintenance cost of display screen.
The present invention provides a kind of LED display driving circuit, the beneficial effect is that:
Middle LED display driving circuit, which is different from the prior art, excessively causes integrated level low, and reliability is poor, and system is unstable
It is fixed, the problem that maintenance difficulties are big and cost is excessively high.A kind of LED display driving circuit provided by the invention has integrated level height,
Install more convenient, later maintenance is relatively easy to, and reduces production cost, therefore have very big economic value.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of LED display driving circuit characterized by comprising signal input interface (10), line driving chip (20),
Column driving chip (30), LED row array (40) and LED array array (50),
The signal input interface (10) is used to connect the control signal of external circuit offer, and the control signal includes enabled letter
Number OE_I, row signal A_I, row signal B_I, latch signal LE_I, clock signal clk _ I and data-signal DA_I；
The line driving chip (20) is connected with the signal input interface (10), and for receiving the signal input interface
(10) enable signal OE_I, row signal A_I, row signal B_I, latch signal LE_I, clock signal clk _ I and the data letter provided
Number DA_I, output control signal includes: enable signal OE_O, row signal A_O, row signal B_O, latch signal after enhanced processing
LE_O, clock signal clk _ O, data-conversion signal/DA_O, 128 bit shift data-signal DA128O and horizontal-drive signal OUT1
~OUT4；
The column driving chip (30) is connected with the line driving chip (20), and for receiving the line driving chip (20)
Latch signal LE_O, the clock signal clk _ O and data-conversion signal/DA_O of output, at column driving chip (30) amplification
Output control signal includes column driving signal after reason；
The LED row array (40) is connected with the line driving chip (20), and for receiving line driving chip (20) output
Horizontal-drive signal OUT1~OUT4；
LED array array (50) is connected with the column driving chip (30), and the column for receiving column driving chip (30) output
Driving signal.
2. LED display driving circuit according to claim 1, which is characterized in that it further include signal output interface (60),
The signal output interface (60) is connected with the line driving chip (20), and defeated for receiving the line driving chip (20)
Enable signal OE_O, row signal A_O, row signal B_O, latch signal LE_O, clock signal clk _ O out, and will receive
Above-mentioned signal is transported to next stage drive circuit.
3. LED display driving circuit according to claim 1, which is characterized in that the column driving chip (30) includes
IC2~IC9 totally 8 pieces of chips are sequentially connected, wherein the input terminal of each chip is used to receive the upper chip output of adjacent connection
Shifted data signal SDI through processing amplification after export shifted data signal SDO and be transported to adjacent connection next chip it is defeated
Enter end.
4. LED display driving circuit according to claim 1 or 3, which is characterized in that the column driving chip (30) is
5020。
5. LED display driving circuit according to claim 1, which is characterized in that the LED row array (40) is by multiple
LED lamp bead composition.
6. LED display driving circuit according to claim 1, which is characterized in that the LED array array (50) is by multiple
LED lamp bead composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570451.3A CN109410830A (en) | 2018-12-21 | 2018-12-21 | A kind of LED display driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570451.3A CN109410830A (en) | 2018-12-21 | 2018-12-21 | A kind of LED display driving circuit |
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| Publication Number | Publication Date |
|---|---|
| CN109410830A true CN109410830A (en) | 2019-03-01 |
Family
ID=65461027
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811570451.3A Pending CN109410830A (en) | 2018-12-21 | 2018-12-21 | A kind of LED display driving circuit |
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| Country | Link |
|---|---|
| CN (1) | CN109410830A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110753424A (en) * | 2019-10-31 | 2020-02-04 | 上海灵信视觉技术股份有限公司 | Pin definition and drive circuit of LED drive chip |
| CN111223465A (en) * | 2020-03-31 | 2020-06-02 | 四川遂宁市利普芯微电子有限公司 | Communication protocol of serial decoding line driving chip of LED display screen |
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| CN209015699U (en) * | 2018-12-21 | 2019-06-21 | 深圳市羽微电子有限公司 | A kind of LED display driving circuit |
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Patent Citations (6)
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|---|---|---|---|---|
| US20130100180A1 (en) * | 2010-07-13 | 2013-04-25 | Shenzhen Yangtze Live Co. Ltd | Color lcos display chip and control method |
| CN203588646U (en) * | 2013-11-20 | 2014-05-07 | 李以华 | LED unit board |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110753424A (en) * | 2019-10-31 | 2020-02-04 | 上海灵信视觉技术股份有限公司 | Pin definition and drive circuit of LED drive chip |
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| CN111223465A (en) * | 2020-03-31 | 2020-06-02 | 四川遂宁市利普芯微电子有限公司 | Communication protocol of serial decoding line driving chip of LED display screen |
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