CN205722739U - A kind of LED display drive circuit of luminescence chip - Google Patents
A kind of LED display drive circuit of luminescence chip Download PDFInfo
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- CN205722739U CN205722739U CN201620403040.5U CN201620403040U CN205722739U CN 205722739 U CN205722739 U CN 205722739U CN 201620403040 U CN201620403040 U CN 201620403040U CN 205722739 U CN205722739 U CN 205722739U
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- lamp bead
- drive circuit
- led display
- control signal
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Abstract
This utility model relates to field of LED display, is specifically related to the LED display drive circuit of a kind of luminescence chip；Solve the technical problem that for: 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；The technical scheme used is: the LED display drive circuit of a kind of luminescence chip, including transducer, described transducer 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 outfan of CPLD control chip is connected with the input of drive circuit, the outfan 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；It is applicable to field of LED display.
Description
Technical field
This utility model relates to field of LED display, is specifically related to the LED display drive circuit of a kind 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.
Utility model content
This utility model 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 adopted in the utility model is: the LED display drive circuit of a kind of luminescence chip, including transducer, described transducer 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 outfan of CPLD control chip is connected with the input of drive circuit, the outfan 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 outfan of described electricallyerasable ROM (EEROM) is connected with the input of matrix switch respectively with the outfan of shift register, the outfan of matrix switch is connected with the input of latch, and the outfan 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.
This utility model compared with prior art has the advantages that
The LED display drive circuit of a kind of luminescence chip of this utility model, including transducer, described transducer includes CPLD control chip and drive circuit, and the outfan 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 outfan of this utility model drive 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 utility model is described in more detail below in conjunction with the accompanying drawings；
Fig. 1 is structural representation of the present utility model；
In figure: 1 is transducer, 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, a kind of LED display drive circuit of luminescence chip, including transducer 1, described transducer 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 outfan of described CPLD control chip 2 is connected with the input of drive circuit 3, and the outfan 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 control signal end 7, the outfan of described electricallyerasable ROM (EEROM) 8 with the outfan of shift register 4 respectively input with matrix switch 5 be connected, the outfan of matrix switch 5 is connected with the input of latch 6, and the outfan 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 foot that drive circuit 3 exports by this utility model, 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 outfan of this utility model drive 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 a kind of luminescence chip of this utility model, including transducer, described transducer includes CPLD control chip and drive circuit, this utility model is with CPLD control chip as core, complete to be serial to parallel data format conversion, turn the most red lamp bead F1, green lamp bead M1, the linkage function of blue lamp bead N1 with parallel, there is substantive distinguishing features and progress；Above in conjunction with accompanying drawing, embodiment of the present utility model is explained in detail, but this utility model is not limited to above-described embodiment, in the ken that those of ordinary skill in the art are possessed, it is also possible on the premise of without departing from this utility model objective, various changes can be made.
Claims (3)
1. the LED display drive circuit of a luminescence chip, it is characterized in that: include transducer (1), described transducer (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 outfan of described CPLD control chip (2) is connected with the input of drive circuit (3), the outfan 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 a kind 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 control signal end (7), the outfan of the outfan of described electricallyerasable ROM (EEROM) (8) and shift register (4) input with matrix switch (5) respectively is connected, the outfan of matrix switch (5) is connected with the input of latch (6), and the outfan of described latch (6) is connected with the input of drive circuit (3).
The LED display drive circuit of a kind 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 |
|---|---|---|---|
| CN201620403040.5U CN205722739U (en) | 2016-05-06 | 2016-05-06 | A kind of LED display drive circuit of luminescence chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620403040.5U CN205722739U (en) | 2016-05-06 | 2016-05-06 | A kind of LED display drive circuit of luminescence chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205722739U true CN205722739U (en) | 2016-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620403040.5U Active CN205722739U (en) | 2016-05-06 | 2016-05-06 | A kind of LED display drive circuit of luminescence chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205722739U (en) |
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2016
- 2016-05-06 CN CN201620403040.5U patent/CN205722739U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |