CN110211526A - LED matrix display and scanning driving method - Google Patents
LED matrix display and scanning driving method Download PDFInfo
- Publication number
- CN110211526A CN110211526A CN201811496459.XA CN201811496459A CN110211526A CN 110211526 A CN110211526 A CN 110211526A CN 201811496459 A CN201811496459 A CN 201811496459A CN 110211526 A CN110211526 A CN 110211526A
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- Prior art keywords
- port
- led matrix
- led
- formula display
- matrix formula
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- 239000011159 matrix material Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000012358 sourcing Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 2
- 239000000872 buffer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
Classifications
-
- 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]
Abstract
The invention discloses an LED matrix type display, which comprises M ports shared by COM (component object model) ends and SEG (sequence object model) ends and an LED matrix consisting of M multiplied by N LEDs, wherein the cross points of diagonal lines in the LED matrix are respectively in short circuit with the M ports through parallel diodes and current-limiting resistors; a scanning driving method of the LED matrix type display is also disclosed. According to the invention, the longitudinal COM end and the transverse SEG end are in short circuit at the cross point of the diagonal line in the LED matrix, so that M ports are shared by the COM port and the SEG port; the n-1 row and n column LED matrix can be driven by using n driving ports (n >2), and n-1 hardware ports can be saved compared with the prior art.
Description
Technical field
The invention belongs to LED display technical fields, and in particular to a kind of LED matrix formula display and turntable driving side
Method.
Background technique
LED display has many advantages, such as high display brightness, bright in luster, little power consumption, at low cost, is widely used in the modern times
Electronic apparatus, such as household electrical appliance, electronic instrument, automatic control equipment.In the prior art, the circuit drives side of LED display
Case generallys use the mode of matrix-scanning, timesharing driving is carried out to each display pel line by line or column by column, to reduce control circuit
The port number of driving.
For classical matrix turntable driving mode, the matrix display device diagram member of a m row n column is driven, m+n driving end is needed
Mouthful；When showing that pel quantity is more, the driving port of demand is increased therewith, and the hardware cost of driving circuit is increase accordingly.
Summary of the invention
In view of this, the main purpose of the present invention is to provide a kind of LED matrix formula display and scanning drive methods.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
The embodiment of the present invention provides a kind of LED matrix formula display, including the shared port in the M end COM and the end SEG, M ×
The LED matrix of N number of LED composition, it is cornerwise in the LED matrix to intersect point respectively through diode and current-limiting resistance in parallel
It is shorted M port.
In above scheme, LED matrix that the M × N number of LED is rearranged according to M row N column matrix.
In above scheme, the M port is controlled by programmable logic device, and each port connects display screen respectively
Pin.
The embodiment of the present invention also provides a kind of scanning drive method of LED matrix formula display, this method are as follows: M port
It is sequentially output low level, when one of port exports low level as the end COM, remaining port is exported in the corresponding period
For showing the data bit of required character.
In above scheme, the remaining port exports the defeated of the data bit for showing required character in the corresponding period
Mode out are as follows: when any one port is the section for needing to light in the remaining port, which exports high level；Institute
When to state any one port in remaining port be the section for not needing to light, which is changed to high resistant vacant state.
In above scheme, when any one port exports low level as the end COM in the M port, which is to fill
Current status, the LED current in LED matrix formula display flow to port by diode, and diode is in positive low impedance state.
In above scheme, when any one port exports high level as the end SEG in the M port, which is to draw
Current status, electric current flow to the LED in LED matrix formula display by current-limiting resistance, and diode is in reversed high impedance status.
Compared with prior art, the present invention by LED matrix it is cornerwise intersect point be shorted the longitudinal end COM with
The lateral end SEG realizes COM and the port SEG and shares M port；N-1 row, n column can be driven using n driving port (n > 2)
LED matrix, n-1 hardware port can be saved compared with the prior art.
Detailed description of the invention
Fig. 1 provides a kind of circuit topology figure of LED matrix formula display for the embodiment of the present invention；
Fig. 2 provides a kind of control sequential figure of the scanning drive method of LED matrix formula display for the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
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.
The embodiment of the present invention provides a kind of LED matrix formula display, including the shared port in the M end COM and the end SEG, M ×
The LED matrix of N number of LED composition, it is cornerwise in the LED matrix to intersect point respectively through diode and current-limiting resistance in parallel
It is shorted M port；The present invention is shorted longitudinal end COM and lateral SEG by point of intersecting cornerwise in LED matrix
End realizes COM and the port SEG and shares M port；N-1 row, the LED square of n column can be driven using n driving port (n > 2)
Battle array, can save n-1 hardware port compared with the prior art.
The diode is realized from current-limiting resistance changes impedance according to different current directions.
The LED matrix that the M × N number of LED is rearranged according to M row N column matrix.
The M port is controlled by programmable logic device, and each port connects the pin of display screen respectively.
The programmable logic device is using chips or its external buffers such as MCU, PLD, FPGA.
When any one port exports low level as the end COM, which is sink current state, the LED in LED matrix
Electric current flows to port by diode, and diode is in positive low impedance state；When any one port exports high electricity as the end SEG
Usually, which is sourcing current state, and electric current flows to the LED in display screen by current-limiting resistance, and diode is in reversed high impedance
State；So making the port of multiplexing when being used as the end COM, lower impedance can be presented, provide low-resistance for multiple ends SEG electric current
Anti- circuit.
As shown in Figure 1, by taking 7 sections 8 LED matrix formula displays as an example, wherein M=8, N=7, the conduct of the port P1~P8
The end COM of each numerical digit, matrix circuit inside display screen are shorted the longitudinal end COM and lateral in cornerwise intersection point
The end SEG is realized COM and the port SEG and is shared；The present invention only uses P1~P8 totally 8 hardware ports, compared to existing 7 section 8
Position LED matrix formula display technology scheme, hardware port quantity reduce 7.
The embodiment of the present invention also provides a kind of scanning drive method of LED matrix formula display, this method are as follows: M port
It is sequentially output low level, when one of port exports low level as the end COM, remaining port is exported in the corresponding period
For showing the data bit of required character.
The present invention cooperates control sequential appropriate, and all of the port all the period of time is made to be in working condition, and is multiplexed row, column drive
Moved end mouthful reduces hardware cost to reduce circuit node.
The remaining port exports the way of output for showing the data bit of required character in the corresponding period are as follows: institute
When to state any one port in remaining port be the section for needing to light, which exports high level；The remaining end
When any one port is the section for not needing to light in mouthful, which is changed to high resistant vacant state.
When any one port exports low level as the end COM in the M port, which is sink current state, LED
LED current in matrix form display flows to port by diode, and diode is in positive low impedance state.
When any one port exports high level as the end SEG in the M port, which is sourcing current state, electricity
Stream flows to the LED in LED matrix formula display by current-limiting resistance, and diode is in reversed high impedance status.
As shown in Fig. 2, the port P1~P8 is sequentially output low level by taking 7 sections 8 LED matrix formula displays as an example, work as P1
When port exports low level as the end COM, the corresponding period need to export the data bit for showing required character in other ports；
The way of output of the data bit are as follows: the section for needing to light exports high level；Without lighting up section,
Port need to be changed to high resistant vacant state, as the dotted line in Fig. 2 indicates.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (7)
1. a kind of LED matrix formula display, which is characterized in that including the shared port in the M end COM and the end SEG, M × N number of LED
The LED matrix of composition, cornerwise point of intersecting is shorted M through diode and current-limiting resistance in parallel respectively in the LED matrix
A port.
2. LED matrix formula display according to claim 1, which is characterized in that the M × N number of LED is according to M row N column square
The LED matrix that battle array rearranges.
3. LED matrix formula display according to claim 1 or 2, which is characterized in that the M port passes through programmable
Logical device control, and each port connects the pin of display screen respectively.
4. a kind of scanning drive method of LED matrix formula display, which is characterized in that this method are as follows: M port is sequentially output low
Level, when one of port exports low level as the end COM, remaining port is exported in the corresponding period for showing
Need the data bit of character.
5. the scanning drive method of LED matrix formula display according to claim 4, which is characterized in that described remaining
Port exports the way of output for showing the data bit of required character in the corresponding period are as follows: any in the remaining port
When a port is the section for needing to light, which exports high level；Any one port is in the remaining port
When the section for not needing to light, which is changed to high resistant vacant state.
6. the scanning drive method of LED matrix formula display according to claim 4 or 5, which is characterized in that the M
When any one port exports low level as the end COM in port, which is sink current state, in LED matrix formula display
LED current port is flowed to by diode, diode is in positive low impedance state.
7. the scanning drive method of LED matrix formula display according to claim 6, which is characterized in that the M port
In any one port as the end SEG export high level when, the port be sourcing current state, electric current by current-limiting resistance flow direction
LED in LED matrix formula display, diode are in reversed high impedance status.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496459.XA CN110211526A (en) | 2018-12-07 | 2018-12-07 | LED matrix display and scanning driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496459.XA CN110211526A (en) | 2018-12-07 | 2018-12-07 | LED matrix display and scanning driving method |
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| Publication Number | Publication Date |
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| CN110211526A true CN110211526A (en) | 2019-09-06 |
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| CN201811496459.XA Pending CN110211526A (en) | 2018-12-07 | 2018-12-07 | LED matrix display and scanning driving method |
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| CN101702302A (en) * | 2009-11-11 | 2010-05-05 | 芯能微电子(苏州)有限公司 | Port self-correlation connected LED display method and circuit |
| CN102194393A (en) * | 2011-06-21 | 2011-09-21 | 深圳市微芯集成电路设计有限公司 | LED (Light-Emitting Diode) display driving circuit |
| CN102723056A (en) * | 2012-06-01 | 2012-10-10 | 深圳市明微电子股份有限公司 | LED display panel driving method, device, display system and equipment |
| CN202632720U (en) * | 2012-06-01 | 2012-12-26 | 深圳市明微电子股份有限公司 | LED (light emitting diode) display panel driving device, display system and equipment |
| CN202905114U (en) * | 2012-09-21 | 2013-04-24 | 中山市晶威电子科技有限公司 | LED display drive circuit |
| CN103078613A (en) * | 2012-12-28 | 2013-05-01 | 惠州市经典照明电器有限公司 | MOS (metal oxide semiconductor) tube driving circuit |
| CN103198791A (en) * | 2013-03-22 | 2013-07-10 | 深圳市天微电子有限公司 | Light-emitting diode (LED) display device |
| CN207022256U (en) * | 2017-07-17 | 2018-02-16 | 郑州众智科技股份有限公司 | A kind of matrix LED drive circuit of indicator |
| CN209312364U (en) * | 2018-12-07 | 2019-08-27 | 华帝股份有限公司 | LED matrix display |
-
2018
- 2018-12-07 CN CN201811496459.XA patent/CN110211526A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702302A (en) * | 2009-11-11 | 2010-05-05 | 芯能微电子(苏州)有限公司 | Port self-correlation connected LED display method and circuit |
| CN102194393A (en) * | 2011-06-21 | 2011-09-21 | 深圳市微芯集成电路设计有限公司 | LED (Light-Emitting Diode) display driving circuit |
| CN102723056A (en) * | 2012-06-01 | 2012-10-10 | 深圳市明微电子股份有限公司 | LED display panel driving method, device, display system and equipment |
| CN202632720U (en) * | 2012-06-01 | 2012-12-26 | 深圳市明微电子股份有限公司 | LED (light emitting diode) display panel driving device, display system and equipment |
| CN202905114U (en) * | 2012-09-21 | 2013-04-24 | 中山市晶威电子科技有限公司 | LED display drive circuit |
| CN103078613A (en) * | 2012-12-28 | 2013-05-01 | 惠州市经典照明电器有限公司 | MOS (metal oxide semiconductor) tube driving circuit |
| CN103198791A (en) * | 2013-03-22 | 2013-07-10 | 深圳市天微电子有限公司 | Light-emitting diode (LED) display device |
| CN207022256U (en) * | 2017-07-17 | 2018-02-16 | 郑州众智科技股份有限公司 | A kind of matrix LED drive circuit of indicator |
| CN209312364U (en) * | 2018-12-07 | 2019-08-27 | 华帝股份有限公司 | LED matrix display |
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