CN103123775B - A kind of dynamic scan LED display and dynamic scanning displaying method - Google Patents
A kind of dynamic scan LED display and dynamic scanning displaying method Download PDFInfo
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- CN103123775B CN103123775B CN201310039723.8A CN201310039723A CN103123775B CN 103123775 B CN103123775 B CN 103123775B CN 201310039723 A CN201310039723 A CN 201310039723A CN 103123775 B CN103123775 B CN 103123775B
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Abstract
The invention discloses a kind of dynamic scan LED display and dynamic scanning displaying method, described dynamic scan LED display comprises some groups of LED modules, described LED module is made up of multiple LED, LED module is connected with driver element respectively, driver element is connected with control module, described driver element comprises the R of DVI signal source, G, B data-signal carries out processing and within a display cycle, is divided into the equal Master Control Center module of 16 parts, with the first crystal oscillator of Master Control Center model calling, R after Master Control Center module is divided into groups, G, B data-signal sequentially sends power switcher and the power switch chip of LED module to, power switcher is connected with Master Control Center module and power switch chip respectively.Dynamic scan LED display of the present invention has the quantity of minimizing drive IC and the PCB adopting aspect less deals with more and more accurate LED module, advantage stable and reliable for performance.
Description
Technical field
The present invention relates to LED display and display packing, be specifically related to a kind of dynamic scan LED display and dynamic scanning displaying method.
Background technology
Line space design between current LED display pixel more and more less, from original 10mm, 6mm, 4mm, 3mm, 2.54mm etc. till now.Along with the spacing between LED is more and more less, it is also more and more less that LED shows module, if adopt conventional static scanning mode, a drive IC can only drive 16 pixels, module PCB surface has put a large amount of drive IC and peripheral cell in amassing, LED is caused to show module PCB design cabling difficulty, even to increase the PCB cabling number of plies to increase cabling space, impel LED to show module cost to rise, the thermal value produced during drive IC work simultaneously also directly has influence on stability and the life-span of LED display, these problems are also the problem places of LED display industry headache the most.
Summary of the invention
The object of this invention is to provide a kind of reduce drive IC quantity and the PCB adopting aspect less deals with more and more accurate LED module, dynamic scan LED display stable and reliable for performance.Meanwhile, present invention also offers a kind of dynamic scanning displaying method.
To achieve these goals, the present invention designs a kind of dynamic scan LED display, comprise some groups of LED modules, described LED module is made up of multiple LED, LED module is connected with driver element respectively, driver element is connected with control module, described driver element comprises the R of DVI signal source, G, B data-signal carries out processing and within a display cycle, is divided into the equal Master Control Center module of 16 parts, with the first crystal oscillator of Master Control Center model calling, R after Master Control Center module is divided into groups, G, B data-signal sequentially sends power switcher and the power switch chip of LED module to, power switcher is connected with Master Control Center module and power switch chip respectively.
Further, the output of described first crystal oscillator is 50Hz.
Further, described Master Control Center module is on-site programmable gate array FPGA, and on-site programmable gate array FPGA is connected with power switcher, and power switcher is connected with power switch chip respectively, and on-site programmable gate array FPGA is connected with DVI signal source.
Further, the model of described power switcher is 74HC4067 chip; The model of described power switch chip is IPF7329.
Further, described control module comprises processor CPU, PC computer and the second crystal oscillator, and described processor CPU is connected with PC computer, Master Control Center module and the second crystal oscillator respectively.
Further, the output of described second crystal oscillator is 22.1184Hz.
The present invention have also been devised a kind of dynamic scanning displaying method realizing dynamic scan LED display, comprises the steps:
(1) DVI signal source processes by driver element and control module, and R, G, B data-signal after process is divided into 16 groups;
(2) within a display cycle, the time is divided into equal 16 parts, 16 groups of R, G, B data-signals after above-mentioned process give power switch chip by power supply signal change-over switch, and control signal is given LED module by power switch chip again.
(3) after LED display module obtains the data-signal of first group of LED, the power supply opening of first group of LED, then first group of LED is lighted according to data, the power-off of other group LED; After LED display module obtains the data-signal of second group of LED, the power supply opening of second group of LED, then second group of LED lights according to data the power-off that other organizes LED.Perform the 3rd group, the 4th group successively ... 16 group of LED carries out work.
Up in case method, described driver element comprises and is carried out processing by R, G, B data-signal of DVI signal source and within a display cycle, be divided into the equal Master Control Center module of 16 parts, described Master Control Center module is on-site programmable gate array FPGA, on-site programmable gate array FPGA is connected with power switcher, power switcher is connected with power switch chip respectively, and on-site programmable gate array FPGA is connected with DVI signal source.
Up in case method, the model of described power switcher is 74HC4067 chip; The model of described power switch chip is IPF7329
Up in case method, described control module comprises processor CPU, PC computer and 22.1184Hz crystal oscillator, and described processor CPU is connected with PC computer, Master Control Center module and 22.1184Hz crystal oscillator respectively.
Dynamic scan LED display of the present invention and dynamic scanning displaying method have the following advantages:
1,1/16 dynamic scan mode is adopted just to save the drive IC of 50% than conventional static scanning mode, under the prerequisite not increasing drive IC mathematics, the LED module more than one times can be driven, improve the utilization ratio of drive IC, the drive IC of saving and cost, avoid because of the large required heat sink material increased of the too much thermal value of IC at Design Stage, thus substantially increase product stability and reliability;
2, the less PCB of employing aspect deals with more and more accurate LED and shows module;
3, avoid the series of problems such as the PCB layout difficulty too much caused because of element, thus greatly improve product in the market competitiveness, improve traditional static drive mode.
accompanying drawing illustrates:
Fig. 1 is the circuit theory diagrams of dynamic scan LED display of the present invention.
Embodiment
For the ease of the understanding of those skilled in the art, below in conjunction with specific embodiment and accompanying drawing, structural principle of the present invention is described in further detail.
A kind of dynamic scan LED display disclosed by the invention, as shown in Figure 1, comprise some groups of LED modules, described LED module is made up of multiple LED, LED module is connected with driver element respectively, driver element is connected with control module, described driver element comprises the R of DVI signal source, G, B data-signal carries out processing and within a display cycle, is divided into the equal Master Control Center module of 16 parts, with the first crystal oscillator of Master Control Center model calling, R after Master Control Center module is divided into groups, G, B data-signal sequentially sends power switcher and the power switch chip of LED module to, power switcher is connected with Master Control Center module and power switch chip respectively.The output of described first crystal oscillator is 50Hz.Described Master Control Center module is on-site programmable gate array FPGA, and on-site programmable gate array FPGA is connected with power switcher, and power switcher is connected with power switch chip respectively, and on-site programmable gate array FPGA is connected with DVI signal source.The model of described power switcher is 74HC4067 chip; The model of described power switch chip is IPF7329.Described control module comprises processor CPU, PC computer and the second crystal oscillator, and described processor CPU is connected with PC computer, Master Control Center module and the second crystal oscillator respectively.The output of described second crystal oscillator is 22.1184Hz.
The invention also discloses a kind of dynamic scanning displaying method realizing dynamic scan LED display, comprise the steps:
(1) DVI signal source processes by driver element and control module, and R, G, B data-signal after process is divided into 16 groups;
(2) within a display cycle, the time is divided into equal 16 parts, 16 groups of R, G, B data-signals after above-mentioned process give power switch chip by power supply signal change-over switch, and control signal is given LED module by power switch chip again.
(3) after LED display module obtains the data-signal of first group of LED, the power supply opening of first group of LED, then first group of LED is lighted according to data, the power-off of other group LED; After LED display module obtains the data-signal of second group of LED, the power supply opening of second group of LED, then second group of LED lights according to data the power-off that other organizes LED.Perform the 3rd group, the 4th group successively ... 16 group of LED carries out work.
In said method, described driver element comprises and is carried out processing by R, G, B data-signal of DVI signal source and within a display cycle, be divided into the equal Master Control Center module of 16 parts, described Master Control Center module is on-site programmable gate array FPGA, on-site programmable gate array FPGA is connected with power switcher, power switcher is connected with power switch chip respectively, and on-site programmable gate array FPGA is connected with DVI signal source.
In said method, the model of described power switcher is 74HC4067 chip; The model of described power switch chip is IPF7329.
In said method, described control module comprises processor CPU, PC computer and 22.1184Hz crystal oscillator, and described processor CPU is connected with PC computer, Master Control Center module and 22.1184Hz crystal oscillator respectively.
The principle of work of dynamic scan LED display of the present invention and dynamic scanning displaying method: according to the characteristic of time-sharing multiplex, by an IC pin, Time-sharing control 16 LED, within a display cycle, time is divided into equal 16 parts, in every a time, only controls a LED job.The high performance FPGA of general, will realize sending data and electrical source exchange two actions within a time.The present invention adopts 1/16th dynamic scan higher to the utilization factor of drive IC than existing 1/2,1/4,1/8 scanning, brings facility, the spacing of such as 2.54mm to closely spaced module design simultaneously./ 16th dynamic scan can also reduce the design cost of module, because the usage quantity of drive IC greatly reduces, because the drive IC quantity that static scanning uses is its 16 times.
The above, be only preferred embodiment of the present invention, not does any pro forma restriction to the present invention; The those of ordinary skill of all industry all can shown in by specification accompanying drawing and the above and implement the present invention swimmingly; But all those skilled in the art are not departing within the scope of technical solution of the present invention, disclosed above technology contents can be utilized and make a little change, modify with differentiation equivalent variations, be Equivalent embodiments of the present invention; Meanwhile, all according to substantial technological of the present invention to the change of any equivalent variations that above embodiment is done, modify and differentiation etc., within the protection domain all still belonging to technical scheme of the present invention.
Claims (10)
1. a dynamic scan LED display screen, comprise some groups of LED modules, described LED module is made up of multiple LED, LED module is connected with driver element respectively, driver element is connected with control module, it is characterized in that: described driver element comprises the R of DVI signal source, G, B data-signal carries out processing and within a display cycle, is divided into the equal Master Control Center module of 16 parts, with the first crystal oscillator of Master Control Center model calling, R after Master Control Center module is divided into groups, G, B data-signal sequentially sends power switcher and the power switch chip of LED module to, power switcher is connected with Master Control Center module and power switch chip respectively.
2. according to the dynamic scan LED display screen described in claim 1, it is characterized in that: the output of described first crystal oscillator is 50MHz.
3. the dynamic scan LED display screen according to claim 1 or 2, it is characterized in that: described Master Control Center module is on-site programmable gate array FPGA, on-site programmable gate array FPGA is connected with power switcher, power switcher is connected with power switch chip respectively, and on-site programmable gate array FPGA is connected with DVI signal source.
4. according to the dynamic scan LED display screen described in claim 3, it is characterized in that: the model of described power switcher is 74HC4067 chip; The model of described power switch chip is IPF7329.
5. according to the dynamic scan LED display screen described in claim 4, it is characterized in that: described control module comprises processor CPU, PC computer and the second crystal oscillator, described processor CPU is connected with PC computer, Master Control Center module and the second crystal oscillator respectively.
6. according to the dynamic scan LED display screen described in claim 5, it is characterized in that: the output 22.1184MHz of described second crystal oscillator.
7. realize a dynamic scanning displaying method for dynamic scan LED display screen, it is characterized in that, comprise the steps:
(1) DVI signal source processes by driver element and control module, and R, G, B data-signal after process is divided into 16 groups;
(2) within a display cycle, the time is divided into equal 16 parts, 16 groups of R, G, B data-signals after above-mentioned process give power switch chip by power supply signal change-over switch, and control signal is given LED module by power switch chip again; (3) after LED display module obtains the data-signal of first group of LED lamp, the power supply opening of first group of LED lamp, then first group of LED lamp is lighted according to data, the power-off of other group LED lamp; After LED display module obtains the data-signal of second group of LED lamp, the power supply opening of second group of LED lamp, then second group of LED lamp lights according to data the power-off that other organizes LED lamp; Perform the 3rd group, the 4th group successively ... 16 group of LED lamp carries out work.
8. according to the dynamic scanning displaying method described in claim 7, it is characterized in that: described driver element comprises and carried out processing by R, G, B data-signal of DVI signal source and within a display cycle, be divided into the equal Master Control Center module of 16 parts, described Master Control Center module is on-site programmable gate array FPGA, on-site programmable gate array FPGA is connected with power switcher, power switcher is connected with power switch chip respectively, and on-site programmable gate array FPGA is connected with DVI signal source.
9. dynamic scanning displaying method according to claim 8, is characterized in that: the model of described power switcher is 74HC4067 chip; The model of described power switch chip is IPF7329.
10. according to the dynamic scanning displaying method described in claim 7, it is characterized in that: described control module comprises processor CPU, PC computer and 22.1184MHz crystal oscillator, described processor CPU is connected with PC computer, Master Control Center module and 22.1184MHz crystal oscillator respectively.
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| CN201310039723.8A CN103123775B (en) | 2013-02-01 | 2013-02-01 | A kind of dynamic scan LED display and dynamic scanning displaying method |
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| CN201310039723.8A CN103123775B (en) | 2013-02-01 | 2013-02-01 | A kind of dynamic scan LED display and dynamic scanning displaying method |
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| CN104318896B (en) * | 2014-10-31 | 2017-12-26 | 广东威创视讯科技股份有限公司 | A kind of display screen scan method and display screen |
| CN106297649A (en) * | 2016-08-10 | 2017-01-04 | 上海正先电子科技有限公司 | A kind of efficient scan method of LED screen |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201513765U (en) * | 2009-09-30 | 2010-06-23 | 李元金 | Led lamp |
| CN201655248U (en) * | 2010-04-15 | 2010-11-24 | 上海凌犀电子科技有限公司 | LED dot-matrix scanning driving control circuit and LED dot-matrix scanning control chip |
| CN102339588A (en) * | 2011-10-08 | 2012-02-01 | 西安辉炜信息科技有限公司 | LED (Light Emitting Diode) screen control card |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001125541A (en) * | 1999-10-29 | 2001-05-11 | Seiwa Electric Mfg Co Ltd | Led unit driving circuit |
| US6876372B2 (en) * | 2002-02-20 | 2005-04-05 | Kyocera Corporation | Image forming apparatus |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201513765U (en) * | 2009-09-30 | 2010-06-23 | 李元金 | Led lamp |
| CN201655248U (en) * | 2010-04-15 | 2010-11-24 | 上海凌犀电子科技有限公司 | LED dot-matrix scanning driving control circuit and LED dot-matrix scanning control chip |
| CN102339588A (en) * | 2011-10-08 | 2012-02-01 | 西安辉炜信息科技有限公司 | LED (Light Emitting Diode) screen control card |
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