CN205722737U - A kind of LED display light emitting control chip - Google Patents
A kind of LED display light emitting control chip Download PDFInfo
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- CN205722737U CN205722737U CN201620363884.1U CN201620363884U CN205722737U CN 205722737 U CN205722737 U CN 205722737U CN 201620363884 U CN201620363884 U CN 201620363884U CN 205722737 U CN205722737 U CN 205722737U
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Abstract
This utility model provides a kind of LED display light emitting control chip, including: the first shift register, the second shift register, the 3rd shift register, the first matrix switch, latch, drive circuit；Described first shift register, the second shift register, the input of the 3rd shift register are connected with the serial control signal end SRDI of red lamp bead, the serial control signal end SGDI of green lamp bead, the serial control signal end SBDI of blue lamp bead respectively, and outfan is connected with described first matrix switch；The outfan of described first matrix switch is connected with the input of described latch, and the outfan of described latch is connected with the input of described drive circuit；The outfan of described drive circuit driving pin with the red lamp bead of LED display, green lamp bead and blue lamp bead respectively is connected.The LED display light emitting control chip that this utility model provides, can make R, G, B lamp bead pin arbitrarily be connected with drive circuit pin, and the pcb board design of LED display is more flexible.
Description
Technical field
This utility model relates to field of LED drive, is specifically related to a kind of for the luminous special light emitting control chip of full-color LED display screen.
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, making PCB design production difficulty big, cost is high.Additionally, due to the lamp bead of different colours uses different drivers, cause needs to use driving IC the most more, further make troubles for product wires design and production.Additionally, in prior art, although have and realize, by existing discrete device IC and special circuit design, the system that R, G, B three primary colors lamp bead can arbitrarily be connected with drive circuit, but this system structure is more complicated, its limited by practical.
Utility model content
This utility model overcomes the deficiency that prior art exists, and technical problem to be solved, for providing a kind of LED display light emitting control chip, makes the LED lamp bead of different colours to be freely connected with driving lamp bead as required.
In order to solve above-mentioned technical problem, the technical solution adopted in the utility model is: a kind of LED display light emitting control chip, it is characterised in that, including: the first shift register, the second shift register, the 3rd shift register, first matrix switch, latch, drive circuit；Described first shift register, the input of the second shift register and the 3rd shift register respectively with the serial control signal end SRDI of red lamp bead, the serial control signal end SGDI of green lamp bead, the serial control signal end SBDI of blue lamp bead connects, described first shift register, the outfan of the second shift register and the 3rd shift register is connected with described first matrix switch, described first shift register, second shift register and the 3rd shift register are for receiving red lamp bead respectively, green lamp bead, the serial control signal of blue lamp bead, and after described serial control signal is converted to parallel control signal, send described first matrix switch to；The outfan of described first matrix switch is connected with the input of described latch, described first matrix switch sends, for receiving described first shift register, described second shift register and described 3rd shift register, the parallel control signal of coming, and described parallel control signal sends under the control controlling depositor of described first matrix switch controlling in the latch respective channel that depositor is specified to described first matrix switch；The outfan of described latch is connected with the input of described drive circuit, the parallel control signal of coming is sent for receiving described first matrix switch, this parallel control signal is stored by respective channel, the parallel control signal after storage is sent to described drive circuit；The outfan of described drive circuit driving pin with the red lamp bead of LED display, green lamp bead and blue lamp bead respectively is connected, for the parallel control signal sent according to described latch, control described red lamp bead, described green lamp bead and described blue lamp bead and carry out luminescence.
Described a kind of LED display light emitting control chip, also includes that electricallyerasable ROM (EEROM), the input of described electricallyerasable ROM (EEROM) pass through I2C bus is connected with controlling data signal port, and the outfan of described electricallyerasable ROM (EEROM) is connected with the input controlling depositor of described first matrix switch, controls data for inputting to the control depositor of described first matrix switch.
Described a kind of LED display light emitting control chip, also includes: the second matrix switch and rheonome；The input of described second matrix switch is connected with the current-limiting resistance of red lamp bead, green lamp bead and blue lamp bead, the outfan of described second matrix switch is connected with the input of described rheonome, and described second matrix switch is for the respective channel controlling to be respectively connecting to the current-limiting resistance of red lamp bead, green lamp bead and blue lamp bead described rheonome controlling depositor according to described second matrix switch；The outfan of described rheonome is connected with described drive circuit, and described rheonome is for the control controlling depositor according to described second matrix switch, the red lamp bead of regulation correspondence, green lamp bead and the driving size of current of blue lamp bead.
The outfan of described electricallyerasable ROM (EEROM) is also connected with the input controlling depositor of described second matrix switch, controls data for inputting to the controller depositor of described second matrix switch.
Described a kind of LED display light emitting control chip, also includes that enumerator, the input of described enumerator are connected with clock signal, and the outfan of described enumerator is connected with described first shift register, the second shift register, the 3rd shift register respectively.
Described first shift register, second shift register, the outfan of the 3rd shift register the most respectively with red colored lamp pearl serial control signal outfan SRDO, green light pearl serial control signal outfan SGDO, blue lamp pearl serial control signal outfan SBDO is connected, described red colored lamp pearl serial control signal outfan SRDO, green light pearl serial control signal outfan SGDO, blue lamp pearl serial control signal outfan SBDO respectively with the red colored lamp pearl serial control signal input SRDI of another light emitting control chip, green light pearl serial control signal input SGDI, blue lamp pearl serial control signal input SBDI connects, for to another light emitting control chip incoming serial control signal described.
Described a kind of LED display light emitting control chip, also includes amplifier, and the input of described amplifier is connected with enabling LE port, and the outfan of described amplifier is connected with the input of described latch.
This utility model compared with prior art has the advantages that
1, R, G, B lamp bead pin can arbitrarily be connected with drive circuit pin, and in PCB circuit design process, PCB design is flexible, and connection is succinct, reduces and uses via, reduces PCB production difficulty and cost.
2, the corresponding relation that each color lamp bead is controlled by R, G, B serial data can be adjusted flexibly, the convenient problem solved in the debugging of full-color LED display screen module and production.
3 and current driving plate control mode and data format compatible.By amendment EEPROM configure data, can flexible compatible various R, G, B serial data format, applied widely.
4, integrated 3 16 road transformation from serial to parallel constant-current LED driver functions, reduction IC usage quantity amasss with taking PCB surface.
Accompanying drawing explanation
The connection diagram of a kind of LED display light emitting control chip that Fig. 1 provides for this utility model.
Detailed description of the invention
The utility model is described in more detail with specific embodiment below in conjunction with the accompanying drawings.
As it is shown in figure 1, this utility model provides a kind of LED display light emitting control chip, including: first shift register the 1, second shift register the 2, the 3rd shift register the 3, first matrix switch 4, latch 5 and drive circuit 6.Wherein, first shift register 1, the input of the second shift register 2 and the 3rd shift register 3 respectively with the serial control signal input SRDI of red lamp bead, the serial control signal input SGDI of green lamp bead, the serial control signal input SBDI of blue lamp bead connects, first shift register 1, second shift register 2 and the outfan of the 3rd shift register 3 and the first matrix switch 4 connect, the outfan of the first matrix switch 4 is connected with the input of latch 5, the outfan of latch 5 is connected with the input of drive circuit 6, the outfan of drive circuit 6 respectively with the red lamp bead of LED display, the driving pin of green lamp bead and blue lamp bead connects.
Wherein, first shift register the 1, second shift register the 2, the 3rd shift register 3 is for receiving redness (R) lamp bead, green (G) lamp bead, the serial control signal of blueness (B) lamp bead respectively, and after this serial control signal is converted to parallel control signal, send the first matrix switch 4 to；First matrix switch 4 receives after first shift register the 1, second shift register 2 and the 3rd shift register 3 send the parallel control signal come, and is sent to the respective channel of the latch 5 controlled specified by depositor 41 by above-mentioned parallel control signal under self controls the control of depositor 41；Latch 5 receive first matrix switch 4 send come parallel control signal after, in the respective channel of self, this parallel control signal is stored, and will storage after parallel control signal be sent to drive circuit 6；The parallel control signal that drive circuit 6 sends according to latch 5, the red, green, blue three-color LED lamp bead controlling to be attached thereto carries out luminescence.
Additionally, LED display light emitting control chip of the present utility model also includes electricallyerasable ROM (EEROM) (EEPROM) 9, the input of electricallyerasable ROM (EEROM) 9 passes through I2C bus is connected with SDA port and SCL port, such that it is able to produce time write control data, the input controlling depositor 41 of the outfan of electricallyerasable ROM (EEROM) 9 and the first matrix switch 4 connects, then the depositor 41 that controls of the first matrix switch 4 can Loading Control three-color LED lamp bead is luminous from electricallyerasable ROM (EEROM) 9 control data.Therefore, the LED display light emitting control chip that this utility model provides, have only to when producing in electricallyerasable ROM (EEROM) 9, write corresponding control data, R, G, B lamp bead pin so can be made can be arbitrarily connected with drive circuit pin, thus, the design of pcb board also respective flexible, connection is succinct, reduce and use via, reduce PCB production difficulty and cost；Additionally, the corresponding relation that each color lamp bead is controlled by R, G, B serial data also can be adjusted flexibly, the convenient problem solved in the debugging of full-color LED display screen module and production.Additionally, this utility model and current driving plate control mode and data format compatible, configure data by amendment electricallyerasable ROM (EEROM) 9, can flexible compatible various R, G, B serial data format, applied widely.
LED display light emitting control chip of the present utility model can also include the second matrix switch 8 and rheonome 7, the input of the second matrix switch 8 is connected with the current-limiting resistance port PB-EXT of the current-limiting resistance port PR-EXT of red lamp bead, the current-limiting resistance port PG-EXT of green lamp bead and blue lamp bead, the outfan of the second matrix switch 8 is connected with the input of rheonome 7, the current-limiting resistance of red lamp bead, green lamp bead and blue lamp bead, under himself controls the control of depositor 81, is respectively connecting to the respective channel of rheonome 7 by the second matrix switch 8；The outfan of rheonome 7 is connected with drive circuit 6, rheonome 7 is according to the control controlling depositor 81 of the second matrix switch 8, can be with red lamp bead corresponding to flexible, green lamp bead and the driving size of current of blue lamp bead, it is not necessary to owing to the difference of assorted lamp bead current-limiting resistance fixes the connected mode of R, G, B lamp bead (red lamp bead, green lamp bead and blue lamp bead) pin and drive circuit pin.
Wherein, the outfan of electricallyerasable ROM (EEROM) 9 is also connected with the input controlling depositor of the second matrix switch 8, makes the control data in the controller depositor 81 of the second matrix switch 8 can load from electricallyerasable ROM (EEROM) 9.
Wherein, in LED display light emitting control chip of the present utility model, shift register 1, shift register 2, shift register 3 can be 16 bit shift register, thus the first matrix switch 4, latch 5 and drive circuit 6 can be 48 passages, such that it is able to trichroism each 16, totally 48 LED lamp bead red, green, blue are carried out light emitting control.Therefore, this utility model is integrated with 3 16 road transformation from serial to parallel constant-current LED driver functions, it is possible to reduce drive the usage quantity of IC to amass with taking PCB surface in LED display.
LED display light emitting control chip of the present utility model can also include enumerator 10, the input of enumerator 10 is connected with clock signal port GLCK, the outfan of enumerator 10 is connected with first shift register the 1, second shift register the 2, the 3rd shift register 3 respectively, thus give position the first shift register the 1, second shift register the 2, the 3rd shift register 3 input clock control signal, enumerator can be 16 digit counters.
Additionally, first shift register the 1, second shift register 2 is connected with red colored lamp pearl serial control signal outfan SRDO, green light pearl serial control signal outfan SGDO and blue lamp pearl serial control signal outfan SBDO the most respectively with the outfan of the 3rd shift register 3；Red colored lamp pearl serial control signal outfan SRDO, green light pearl serial control signal outfan SGDO and blue lamp pearl serial control signal outfan SBDO are connected with red colored lamp pearl serial control signal input SRDI, green light pearl serial control signal input SGDI, the blue lamp pearl serial control signal input SBDI of another light emitting control chip respectively, for the red lamp bead of another light emitting control chip input, green lamp bead, blue lamp pearl serial control signal.
LED display light emitting control chip of the present utility model, also include amplifier 11, the input of amplifier 11 is connected with enabling LE port, amplifier 11 outfan is connected with the input of latch 5, thus by enabling LE port, control chip of the present utility model is carried out logic control, additionally, the input of amplifier 11 is also by resistance R ground connection.
This utility model provides a kind of LED display light emitting control chip, makes R, G, B lamp bead pin to be arbitrarily connected with drive circuit pin, and PCB design is flexible, and connection is succinct, reduces and uses via, reduces PCB production difficulty and cost；Additionally, the corresponding relation that each color lamp bead is controlled by red lamp bead, green lamp bead, the serial data of blue lamp bead can be adjusted flexibly, the problem in conveniently solving the debugging of full-color LED display screen module and producing；Meanwhile, this chip and current driving plate control mode and data format compatible, configure data by amendment EEPROM, can compatible various red lamp bead, green lamp bead, blueness lamp bead (R, G, B) serial data format flexibly, applied widely.
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 (7)
1. a LED display light emitting control chip, it is characterised in that including: the first shift register, the second shift register, the 3rd shift register, the first matrix switch, latch, drive circuit；
Described first shift register, the input of the second shift register and the 3rd shift register respectively with the serial control signal end SRDI of red lamp bead, the serial control signal end SGDI of green lamp bead, the serial control signal end SBDI of blue lamp bead connects, described first shift register, the outfan of the second shift register and the 3rd shift register is connected with described first matrix switch, described first shift register, second shift register and the 3rd shift register are for receiving red lamp bead respectively, green lamp bead, the serial control signal of blue lamp bead, and after described serial control signal is converted to parallel control signal, send described first matrix switch to；
The outfan of described first matrix switch is connected with the input of described latch, described first matrix switch sends, for receiving described first shift register, described second shift register and described 3rd shift register, the parallel control signal of coming, and described parallel control signal sends under the control controlling depositor of described first matrix switch controlling in the latch respective channel that depositor is specified to described first matrix switch；
The outfan of described latch is connected with the input of described drive circuit, the parallel control signal of coming is sent for receiving described first matrix switch, this parallel control signal is stored by respective channel, the parallel control signal after storage is sent to described drive circuit；
The outfan of described drive circuit driving pin with the red lamp bead of LED display, green lamp bead and blue lamp bead respectively is connected, for the parallel control signal sent according to described latch, control described red lamp bead, described green lamp bead and described blue lamp bead and carry out luminescence.
A kind of LED display light emitting control chip the most according to claim 1, it is characterised in that also include that electricallyerasable ROM (EEROM), the input of described electricallyerasable ROM (EEROM) pass through I2C bus is connected with controlling data signal port, and the outfan of described electricallyerasable ROM (EEROM) is connected with the input controlling depositor of described first matrix switch, controls data for inputting to the control depositor of described first matrix switch.
A kind of LED display light emitting control chip the most according to claim 2, it is characterised in that also include: the second matrix switch and rheonome；
The input of described second matrix switch is connected with the current-limiting resistance of red lamp bead, green lamp bead and blue lamp bead, the outfan of described second matrix switch is connected with the input of described rheonome, and described second matrix switch is for the respective channel controlling to be respectively connecting to the current-limiting resistance of red lamp bead, green lamp bead and blue lamp bead described rheonome controlling depositor according to described second matrix switch；
The outfan of described rheonome is connected with described drive circuit, and described rheonome is for the control controlling depositor according to described second matrix switch, the red lamp bead of regulation correspondence, green lamp bead and the driving size of current of blue lamp bead.
A kind of LED display light emitting control chip the most according to claim 3, it is characterized in that, the outfan of described electricallyerasable ROM (EEROM) is also connected with the input controlling depositor of described second matrix switch, controls data for inputting to the controller depositor of described second matrix switch.
A kind of LED display light emitting control chip the most according to claim 1, it is characterized in that, also include enumerator, the input of described enumerator is connected with clock signal, and the outfan of described enumerator is connected with described first shift register, the second shift register, the 3rd shift register respectively.
nullA kind of LED display light emitting control chip the most according to claim 1，It is characterized in that，Described first shift register、Second shift register、The outfan of the 3rd shift register the most respectively with red colored lamp pearl serial control signal outfan SRDO、Green light pearl serial control signal outfan SGDO、Blue lamp pearl serial control signal outfan SBDO is connected，Described red colored lamp pearl serial control signal outfan SRDO、Green light pearl serial control signal outfan SGDO、Blue lamp pearl serial control signal outfan SBDO respectively with the red colored lamp pearl serial control signal input SRDI of another light emitting control chip、Green light pearl serial control signal input SGDI、Blue lamp pearl serial control signal input SBDI connects，For to another light emitting control chip incoming serial control signal described.
A kind of LED display light emitting control chip the most according to claim 1, it is characterised in that also include amplifier, the input of described amplifier is connected with enabling LE port, and the outfan of described amplifier is connected with the input of described latch.
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| CN201620363884.1U CN205722737U (en) | 2016-04-27 | 2016-04-27 | A kind of LED display light emitting control chip |
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| CN201620363884.1U CN205722737U (en) | 2016-04-27 | 2016-04-27 | A kind of LED display light emitting control chip |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490558A (en) * | 2018-12-07 | 2019-03-19 | 陈斌斌 | A kind of alcohol monitoring displaying alarming prompt device systems |
| CN114822370A (en) * | 2021-01-19 | 2022-07-29 | 郑锦池 | Light emitting assembly and light emitting device comprising same |
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2016
- 2016-04-27 CN CN201620363884.1U patent/CN205722737U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490558A (en) * | 2018-12-07 | 2019-03-19 | 陈斌斌 | A kind of alcohol monitoring displaying alarming prompt device systems |
| CN114822370A (en) * | 2021-01-19 | 2022-07-29 | 郑锦池 | Light emitting assembly and light emitting device comprising same |
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