CN105869569A - LED display screen driving circuit of luminous chip - Google Patents
LED display screen driving circuit of luminous chip Download PDFInfo
- Publication number
- CN105869569A CN105869569A CN201610295288.9A CN201610295288A CN105869569A CN 105869569 A CN105869569 A CN 105869569A CN 201610295288 A CN201610295288 A CN 201610295288A CN 105869569 A CN105869569 A CN 105869569A
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- CN
- China
- Prior art keywords
- lamp bead
- led display
- control signal
- drive circuit
- signal end
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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)
Abstract
The invention relates to the field of LED display screens, in particular to an LED display screen driving circuit of a luminous chip, and is suitable for the field of LED display screens. The technical problem of providing an LED display screen driving circuit which can enable LED lamp beads with different colors to be freely connected with driving lamp beads according to needs is solved. According to the technical scheme, the LED display screen driving circuit of the luminous chip comprises a converter which comprises a CPLD control chip and a driving circuit, the input end of the CPLD control chip is connected with a serial control signal port R1 of a red lamp bead, a serial control signal port G1 of a green lamp bead and a serial control signal port B1 of a blue lamp bead respectively, the output end of the CPLD control chip is connected with the input end of the driving circuit, and the output end of the driving circuit is connected with a driving pin of a red lamp bead F1, a driving pin of a green lamp bead M1 and a driving pin of a blue lamp bead N1 of an LED display screen respectively.
Description
Technical field
The present invention relates to field of LED display, be specifically related to the LED display drive circuit of luminescence chip.
Background technology
Current full-color LED display screen module uses separation or three-in-one R, G, B three primary colors lamp bead, when design lamp bead drives PCB layout, need to be grouped the lamp bead of same color to be connected to same 16 road transformation from serial to parallel constant-current LED drivers, different colours is connected to the different transformation from serial to parallel multiple constant current LED specified and drives on IC, need to coordinate the wiring of other discrete devices, therefore, the wiring that frequently can lead to make pcb board is more complicated, use via is more, make PCB design production difficulty big, cost is high, and, need when designing lamp bead drive circuit to be grouped the lamp bead of same color and be connected to same transformation from serial to parallel multiple constant current LED driving IC.This makes PCB layout more complicated, uses via more, and PCB design production difficulty is big, and cost is high.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, technical problem to be solved to be: provide a kind of LED lamp bead that can make different colours can as required with the LED display drive circuit driving lamp bead freely be connected.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is: the LED display drive circuit of luminescence chip, including converter, described converter includes CPLD control chip and drive circuit, the input of described CPLD control chip respectively with the serial control signal end R1 of red lamp bead, the serial control signal end G1 of green lamp bead, the serial control signal end B1 of blue lamp bead is connected, the described output of CPLD control chip is connected with the input of drive circuit, the output of described drive circuit respectively with red lamp bead F1 of LED display, green lamp bead M1 is connected with the driving pin of blue lamp bead N1.
Described CPLD control chip includes shift register, matrix switch, latch, control signal end and electricallyerasable ROM (EEROM), the input of described shift register is connected with the serial control signal end R1 of red lamp bead, the serial control signal end G1 of green lamp bead, the serial control signal end B1 of blue lamp bead, and the input of described electricallyerasable ROM (EEROM) passes through I2C bus is connected with controlling data signal port, the output of described electricallyerasable ROM (EEROM) is connected with the input of matrix switch respectively with the output of shift register, the output of matrix switch is connected with the input of latch, and the output of described latch is connected with the input of drive circuit.
Described shift register includes the first shift register, the second shift register and the 3rd shift register.
The present invention compared with prior art has the advantages that
The LED display drive circuit of luminescence chip of the present invention, including converter, described converter includes CPLD control chip and drive circuit, and the output of drive circuit driving pin with red lamp bead F1 of LED display, green lamp bead M1 and blue lamp bead N1 respectively is connected；The output of present invention driver circuit can arbitrarily driving pin with red lamp bead, green lamp bead and blue lamp bead be connected, and PCB design is flexible, and connection is succinct, reduces and uses via, reduction PCB production difficulty and cost；It is capable of the control flexibly to lamp bead, the convenient problem solved in full-color LED display screen debugging and production by the serial control signal end R1 of red lamp bead, the serial control signal end G1 of green lamp bead, the serial control signal end B1 of blue lamp bead.
Accompanying drawing explanation
The present invention will be further described in detail below in conjunction with the accompanying drawings；
Fig. 1 is the structural representation of the present invention；
In figure: 1 is converter, 2 is CPLD control chip, and 3 is drive circuit, and 4 is shift register, and 5 is matrix switch, and 6 is latch, and 7 is control signal end, and 8 is electricallyerasable ROM (EEROM).
Detailed description of the invention
As shown in Figure 1, the LED display drive circuit of luminescence chip, including converter 1, described converter 1 includes CPLD control chip 2 and drive circuit 3, the input of described CPLD control chip 2 is connected with the serial control signal end R1 of red lamp bead, the serial control signal end G1 of green lamp bead, the serial control signal end B1 of blue lamp bead respectively, the output 2 of described CPLD control chip is connected with the input of drive circuit 3, and the output of described drive circuit 3 driving pin with the red lamp bead of LED display, green lamp bead and blue lamp bead respectively is connected.
Described CPLD control chip 2 includes shift register 4, matrix switch 5, latch 6, control signal end 7 and electricallyerasable ROM (EEROM) 8, the input of described shift register 4 is connected with the serial control signal end R1 of red lamp bead, the serial control signal end G1 of green lamp bead, the serial control signal end B1 of blue lamp bead, and the input of described electricallyerasable ROM (EEROM) 8 passes through I2C bus is connected with controlling data signal port 7, the output of described electricallyerasable ROM (EEROM) 8 with the output of shift register 4 respectively input with matrix switch 5 be connected, the output of matrix switch 5 is connected with the input of latch 6, and the output of described latch 6 is connected with the input of drive circuit 3.
Described shift register 4 includes the first shift register, the second shift register and the 3rd shift register.
The pin of red lamp bead F1, green lamp bead M1 and blue lamp bead N1 is connected on any pin that drive circuit 3 exports by the present invention, the input of each passage of drive circuit 3 is connected with the output of CPLD control chip 2, CPLD control chip 2 is for improving the driving force of electric current in CPLD control chip 2, concrete CPLD control chip 2 can drive red lamp bead F1, green lamp bead M1 and the quantity of blue lamp bead N1 three primary colors lamp bead, and concrete lamp bead quantity is determined by the performance of LED display and the model of CPLD control chip 2.
System electrification process, first CPLD control chip 2 completes active arrangement, the serial control signal end R1 of red lamp bead, the serial control signal end G1 of green lamp bead, the serial control signal end B1 of blue lamp bead transmits the serial data in CPLD control chip 2 respectively, the serial data sent first is converted to parallel data by CPLD control chip 2, then the circuit corresponding relation in configuring according to CPLD control chip 2, parallel data step-by-step is arranged on red lamp bead F1 corresponding with drive circuit 3, in the pin level of green lamp bead M1 and blue lamp bead N1 three primary colors lamp bead, lamp bead work is controlled with this, it is stored in the electricallyerasable ROM (EEROM) 8 in CPLD control chip 2 with other configuration data of CPLD control chip 2, for running.
The output of present invention driver circuit can arbitrarily driving pin with red lamp bead F1, green lamp bead M1 and blue lamp bead N1 be connected, and PCB design is flexible, and connection is succinct, reduces and uses via, reduction PCB production difficulty and cost；It is capable of the control flexibly to lamp bead, the convenient problem solved in full-color LED display screen debugging and production by the serial control signal end R1 of red lamp bead, the serial control signal end G1 of green lamp bead, the serial control signal end B1 of blue lamp bead.
This LED display drive circuit and prior art drive control mode and the data format compatible of plate, data are configured by amendment CPLD control chip 2, it is suitable for the serial data control protocol of the serial control signal end B1 of the serial control signal end R1 of all of red lamp bead, the serial control signal end G1 of green lamp bead and blue lamp bead, applied widely, by designing the configuration data of CPLD control chip 2, establish hardware foundation for designing special display effect.
The LED display drive circuit of luminescence chip of the present invention, including converter, described converter includes CPLD control chip and drive circuit, the present invention is with CPLD control chip as core, complete to be serial to parallel data format conversion, turn arbitrarily redness lamp bead F1, green lamp bead M1, the linkage function of blue lamp bead N1 with parallel, there is prominent substantive distinguishing features and significantly progress；Above in conjunction with accompanying drawing, embodiments of the invention are explained in detail, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art are possessed, it is also possible to various changes can be made on the premise of without departing from present inventive concept.
Claims (3)
1. the LED display drive circuit of luminescence chip, it is characterized in that: include converter (1), described converter (1) includes CPLD control chip (2) and drive circuit (3), the input of described CPLD control chip (2) respectively with the serial control signal end R1 of red lamp bead, the serial control signal end G1 of green lamp bead, the serial control signal end B1 of blue lamp bead is connected, the output (2) of described CPLD control chip is connected with the input of drive circuit (3), the output of described drive circuit (3) respectively with red lamp bead F1 of LED display, green lamp bead M1 is connected with the driving pin of blue lamp bead N1.
The LED display drive circuit of luminescence chip the most according to claim 1, it is characterized in that: described CPLD control chip (2) includes shift register (4), matrix switch (5), latch (6), control signal end (7) and electricallyerasable ROM (EEROM) (8), the input of described shift register (4) is connected with the serial control signal end R1 of red lamp bead, the serial control signal end G1 of green lamp bead, the serial control signal end B1 of blue lamp bead, and the input of described electricallyerasable ROM (EEROM) (8) passes through I2C bus is connected with controlling data signal port (7), the output of the output of described electricallyerasable ROM (EEROM) (8) and shift register (4) input with matrix switch (5) respectively is connected, the output of matrix switch (5) is connected with the input of latch (6), and the output of described latch (6) is connected with the input of drive circuit (3).
The LED display drive circuit of luminescence chip the most according to claim 2, it is characterised in that: described shift register (4) includes the first shift register, the second shift register and the 3rd shift register.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610295288.9A CN105869569A (en) | 2016-05-06 | 2016-05-06 | LED display screen driving circuit of luminous chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610295288.9A CN105869569A (en) | 2016-05-06 | 2016-05-06 | LED display screen driving circuit of luminous chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105869569A true CN105869569A (en) | 2016-08-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610295288.9A Pending CN105869569A (en) | 2016-05-06 | 2016-05-06 | LED display screen driving circuit of luminous chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105869569A (en) |
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2016
- 2016-05-06 CN CN201610295288.9A patent/CN105869569A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160817 |