CN107424557A - A kind of single dual-colored LED display drive circuit - Google Patents
A kind of single dual-colored LED display drive circuit Download PDFInfo
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- CN107424557A CN107424557A CN201710699968.1A CN201710699968A CN107424557A CN 107424557 A CN107424557 A CN 107424557A CN 201710699968 A CN201710699968 A CN 201710699968A CN 107424557 A CN107424557 A CN 107424557A
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- hub12
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- 230000011664 signaling Effects 0.000 claims abstract description 15
- 230000003139 buffering effect Effects 0.000 claims description 12
- 101000631899 Homo sapiens Ribosome maturation protein SBDS Proteins 0.000 description 2
- 102100028750 Ribosome maturation protein SBDS Human genes 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 102100033270 Cyclin-dependent kinase inhibitor 1 Human genes 0.000 description 1
- 101000944380 Homo sapiens Cyclin-dependent kinase inhibitor 1 Proteins 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 208000028485 lattice corneal dystrophy type I Diseases 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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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)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention provides a kind of single dual-colored LED display drive circuit, it includes the first signaling interface chip HUB12, interface control chip DP4536, 16 constant-current source drive chip DP5020, line driving chip DP4953 and LED array, the interface control chip DP4536, it is connected with the first signaling interface chip HUB12, 16 constant-current source drive chip DP5020, it is connected with the interface control chip, the line driving chip DP4953, it is connected with the interface control chip, receive the row decoding signal L0 L3 of the interface control chip DP4536 outputs, for providing horizontal-drive signal for the LED array.Using single dual-colored LED display drive circuit of the present invention, the cost of single dual-colored LED display drive circuit can be reduced.
Description
Technical field
The present invention relates to LED field, more particularly to a kind of single dual-colored LED display drive circuit.
Background technology
Common LED display is divided into all-colour LED electrical screen and single dual-colored LED display screen.Single dual-colored LED display screen is therefore
Cost is low, small power consumption, be widely used in market, shop, bank etc. it is various need show word, signboard, advertisement field.
The drive scheme of single dual-colored LED display screen of the prior art is：Delayed using eight bit shift registers, eight bit data
The combination for rushing device, three or eight decoders, row driving pmos pipes drives LED display.
With the continuous expansion of the market demand, competition is more and more fierce, and considering for cost occupies prominent critical role.It is existing
In the drive circuit for having single dual-colored LED display screen in technology, because using the combination of multiple chips, cause cost high, competition
Power is low.
The content of the invention
It is an object of the invention to provide a kind of inexpensive single dual-colored LED display drive circuit, to solve prior art
Single dual-colored LED display screen drive scheme cost it is high the problem of.
In embodiments of the present invention, there is provided a kind of single dual-colored LED display drive circuit, it includes the first signaling interface
Chip HUB12, interface control chip DP4536,16 constant-current source drive chip DP5020, line driving chip DP4953 and LED battle array
Row,
The first signaling interface chip HUB12, the display control signal provided for the outside MCU that transfers, the display control
Signal include display allow signal OE, row signal A, row signal B, shift clock signal CLK, latch signal LE and carry digit it is believed that
Number R,
The interface control chip DP4536, it is connected with the first signaling interface chip HUB12, for receiving described first
The display control signal that signaling interface chip HUB12 is provided, is exported after entering row buffering to the display control signal, and right
Row decoding signal L0-L3 is exported after the row signal A, row signal B decoding；
16 constant-current source drive chip DP5020, are connected with the interface control chip, receive the Interface Controller core
The shift clock buffering signals CLK0 and latch buffering signals LCD0 of piece DP4536 outputs, and provide row control for the LED array
Signal processed,
The line driving chip DP4953, is connected with the interface control chip, receives the interface control chip DP4536
The row decoding signal L0-L3 of output, for providing horizontal-drive signal for the LED array.
In embodiments of the present invention, single dual-colored LED display drive circuit also includes and the interface control chip
The secondary signal interface chip HUB12 that DP4536 is connected, after receiving the interface control chip DP4536 bufferings
The display control signal of output.
In embodiments of the present invention, the LED array is made up of multiple LED.
Compared with prior art, in single dual-colored LED display drive circuit of the invention, by Dan Shuan of the prior art
The function of multiple chips in color LED display drive circuit is integrated into a chip, is reduced single dual-colored LED display screen and is driven
The cost of dynamic scheme；Further, special processing has been carried out on the circuit layout of chip so that chip has stronger resist
Interference performance, improve the performance of single dual-colored LED display drive circuit.
Brief description of the drawings
Fig. 1 is the structural representation of single dual-colored LED display drive circuit of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It is described in detail below in conjunction with realization of the specific embodiment to the present invention,
As shown in figure 1, in inventive embodiments, there is provided a kind of single dual-colored LED display drive circuit, it is characterised in that bag
Include the first signaling interface chip HUB12（Left side chip in figure）, second interface signaling interface chip HUB12（Right side core in figure
Piece）, control chip DP4536,16 constant-current source drive chip DP5020, line driving chip DP4953 and be made up of multiple LED
LED array.It is specifically described below.
The first signaling interface chip HUB12, the display control signal provided for the outside MCU that transfers, the display
Control signal, which includes display, allows signal OE, row signal A, row signal B, shift clock signal CLK, latch signal LE and carry digit
It is believed that number R.
The interface control chip DP4536, it is connected with the first signaling interface chip HUB12, it is described for receiving
The display control signal that first signaling interface chip HUB12 is provided, is exported after entering row buffering to the display control signal,
And row decoding signal L0-L3 is exported after being decoded to the row signal A, row signal B.
16 constant-current source drive chip DP5020, are connected with the interface control chip, receive the interface control
The shift clock buffering signals CLK0 and latch buffering signals LCD0 of coremaking piece DP4536 outputs, and provided for the LED array
Row control signal out1-out3.
The line driving chip DP4953, is connected with the interface control chip, receives the interface control chip
The row decoding signal L0-L3 of DP4536 outputs, for providing horizontal-drive signal out1-out8 for the LED array.
The secondary signal interface chip HUB12 is further connected with the interface control chip DP4536, for connecing
The display control signal exported after the interface control chip DP4536 bufferings is received, these signals are sent to next interface
In control chip DP4536, the relaying of signal is carried out.
It should be noted that the interface control chip DP4536 is the core for realizing technical solution of the present invention, it is by eight
Bit shift register, eight bit data buffer, the function of three or eight decoders are integrated on a single die, reduce the body of chip
Product, reduce the cost of whole circuit.
The pin function of the interface control chip DP4536 is as shown in the table：
| Pin sequence number | Title | Function declaration |
| 1 | LCDO | Latch signal buffer output terminal |
| 2 | CLKO | Shift clock buffer output terminal |
| 3 | SDO0 | Mobile data buffer output terminal, signal inside shaping negate, and SDO0 gives the use of this plate |
| 4 | OEI | Display allows signal input part, and inside pulls down, and high level is effective.OEI signals also give the 2-4 decoders of inside, for controlling row decoding to export in addition to giving the buffer of inside |
| 5、6 | AI、BI | Row signal input part, AI are low level, and BI is a high position, while AI gives monostable protection circuit, and after AI stops saltus step about 130ms, monostable protection circuit is in guard mode, is pulled down inside AI, BI |
| 7 | CLKI | Shift clock input, inside drop-down |
| 8 | LCDI | Latch signal input, inside drop-down |
| 9 | SDI0 | Shifted data input, inside drop-down |
| 10 | GND | Power cathode |
| 11 | SDI1 | Shifted data input, inside drop-down |
| 12 | SDO1 | Shifted data buffer output terminal, signal inside shaping negate, and SDO1 gives accessory power outlet |
| 13、14 | AO、BO | Row signal output part, AO, BO give accessory power outlet |
| 15 | OEO | Display allows signal output part, and OEO gives accessory power outlet |
| 16~19 | L3~L0 | Row signal interpretation output end, is the 2-4 decoding results of AI, BI signal, and low level is effective.If OEI signals are low level, L0~3 are high level.After monostable protection circuit is guard mode, L0~3 can be complete Portion is in high level state |
| 20 | VDD | Positive source |
In summary, single dual-colored LED display drive circuit of the invention drives single dual-colored LED display screen of the prior art
The function of multiple chips in circuit is integrated into a chip, reduces the cost of single dual-colored LED display screen drive scheme；Enter
One step, special processing is carried out on the circuit layout of chip so that chip has stronger antijamming capability, improves
The performance of single dual-colored LED display drive circuit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (3)
1. a kind of single dual-colored LED display drive circuit, it is characterised in that including the first signaling interface chip HUB12, interface control
Coremaking piece DP4536,16 constant-current source drive chip DP5020, line driving chip DP4953 and LED array,
The first signaling interface chip HUB12, the display control signal provided for the outside MCU that transfers, the display control
Signal include display allow signal OE, row signal A, row signal B, shift clock signal CLK, latch signal LE and carry digit it is believed that
Number R；
The interface control chip DP4536, it is connected with the first signaling interface chip HUB12, for receiving described first
The display control signal that signaling interface chip HUB12 is provided, is exported after entering row buffering to the display control signal, and right
Row decoding signal L0-L3 is exported after the row signal A, row signal B decoding；
16 constant-current source drive chip DP5020, are connected with the interface control chip, receive the Interface Controller core
The shift clock buffering signals CLK0 and latch buffering signals LCD0 of piece DP4536 outputs, and provide row control for the LED array
Signal processed；
The line driving chip DP4953, is connected with the interface control chip, for receiving the interface control chip
The row decoding signal L0-L3 of DP4536 outputs, horizontal-drive signal is provided for the LED array.
2. single dual-colored LED display drive circuit as claimed in claim 1, it is characterised in that also include and the interface control
The secondary signal interface chip HUB12 that coremaking piece DP4536 is connected, for receiving the interface control chip DP4536
The display control signal exported after buffering.
3. single dual-colored LED display drive circuit as claimed in claim 1, it is characterised in that the LED array is by multiple
LED is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710699968.1A CN107424557B (en) | 2017-08-16 | 2017-08-16 | Single-double-color LED display screen driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710699968.1A CN107424557B (en) | 2017-08-16 | 2017-08-16 | Single-double-color LED display screen driving circuit |
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| Publication Number | Publication Date |
|---|---|
| CN107424557A true CN107424557A (en) | 2017-12-01 |
| CN107424557B CN107424557B (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710699968.1A Active CN107424557B (en) | 2017-08-16 | 2017-08-16 | Single-double-color LED display screen driving circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109410830A (en) * | 2018-12-21 | 2019-03-01 | 深圳市羽微电子有限公司 | A kind of LED display driving circuit |
| CN109559677A (en) * | 2018-12-20 | 2019-04-02 | 深圳市羽微电子有限公司 | A kind of LED display driver IC |
| CN110767153A (en) * | 2019-11-08 | 2020-02-07 | 深圳市德普微电子有限公司 | Pre-charging method of LED display screen |
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| KR20030083467A (en) * | 2002-04-23 | 2003-10-30 | 김영호 | A drive module of the led-type electrical signboard |
| CN200953230Y (en) * | 2006-05-19 | 2007-09-26 | 康佳集团股份有限公司 | Signal interface circuit for LED display module |
| CN201207737Y (en) * | 2007-12-21 | 2009-03-11 | 康佳集团股份有限公司 | LED driving board |
| CN101707041A (en) * | 2009-08-04 | 2010-05-12 | 深圳市天微电子有限公司 | Integrated driving device used for LED advertisement display screen |
| CN201853466U (en) * | 2010-10-14 | 2011-06-01 | 黄冬来 | LED (light-emitting diode) display screen control system |
| CN102760403A (en) * | 2011-04-25 | 2012-10-31 | 康佳集团股份有限公司 | Signal interface circuit of LED module and LED display device |
| US20130099701A1 (en) * | 2011-10-24 | 2013-04-25 | Advanced Analogic Technologies, Inc. | Low Cost LED Driver With Improved Serial Bus |
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| KR20030083467A (en) * | 2002-04-23 | 2003-10-30 | 김영호 | A drive module of the led-type electrical signboard |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109559677A (en) * | 2018-12-20 | 2019-04-02 | 深圳市羽微电子有限公司 | A kind of LED display driver IC |
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| CN110767153A (en) * | 2019-11-08 | 2020-02-07 | 深圳市德普微电子有限公司 | Pre-charging method of LED display screen |
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| Publication number | Publication date |
|---|---|
| CN107424557B (en) | 2023-01-24 |
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Denomination of invention: A driving circuit for single and dual color LED display screens Granted publication date: 20230124 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: SHENZHEN DEVELOPER MICROELECTRONICS CO.,LTD. Registration number: Y2024980024109 |