CN105528991A - LED scanning control display unit - Google Patents
LED scanning control display unit Download PDFInfo
- Publication number
- CN105528991A CN105528991A CN201610092750.5A CN201610092750A CN105528991A CN 105528991 A CN105528991 A CN 105528991A CN 201610092750 A CN201610092750 A CN 201610092750A CN 105528991 A CN105528991 A CN 105528991A
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- Prior art keywords
- row
- led
- decoding
- driving
- module
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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]
Abstract
The invention discloses an LED scanning control display unit, which comprises a logic control module, an LED driving module, a field-effect tube array and an LED array, wherein the LED driving module comprises a column driving IC and a row driving IC, the row driving IC superposes row scanning control signals to a display data line for transmission. According to the scanning control display unit, a row decoding IC in a scanning logic block in the prior art is improved to be replaced with the row driving IC of the LED driving module, the row scanning control signals are superposed into the display data line for transmission, a decoding function of the original row decoding IC is achieved by utilizing the row driving IC, the driving ICs of the LED driving modules are fully utilized, and the problems of too many decoding lines, complex wiring and large occupied space of the decoding IC are avoided.
Description
Technical field
The present invention relates to LED display and control field, particularly relate to a kind of LED scan control display unit.
Background technology
LED display comprises two kinds of main type of drive: Static and dynamic scans.Static display brightness is high, is applicable to open air.Its control mode is exactly continue to power to a kind of color individuality of single pixel (being generally a LED).Each like this picture element has enough drive currents, and brightness is corresponding higher, and energy consumption is also high simultaneously.Dynamic scan mode has 1/2,1/3 ..., 1/32 etc., because LED display is timesharing line by line refresh display, scan mode also just determines the mode that display refreshes, as 1/16 is exactly each refreshing 1 row, 16 behavior one scan periods, ABCD tetra-signals are needed to control; 1/8 is exactly each refreshing 1 row, 8 behavior one scan periods, needs ABC tri-signals to control; Other the like.The difference of Static and dynamic scanning is: the control mode of dynamic scan is equivalent to the electric current timesharing continuing to power to single lamp under original static cost control mode for giving multiple LED.Therefore under the condition that other situations are identical, under LED drive IC drive current same case, 1/2 scanning brightness of display screen is lower than static state, and 1/2,1/4,1/8,1/16 scanning brightness of display screen reduces successively.
Along with the requirement of present city lighting engineering is more and more higher, require that brightness height on daytime gray scale is good, the dark gray in evening will be got well too, but the light intensity of present single LED lamp is more and more brighter, and the such as product of lamp bar is all static, do scan increase sweep trace again traditionally, lamp bar natively strip, increase line connect up almost cloth not under, particularly thinner lamp bar (highly dense lamp bar screen), on the other hand static lamp bar brightness is high, not only power consumption source but also light pollution.Traditional dynamic scan module has following shortcoming:
1, LED display dynamic scan module of the prior art needs ABCDE signal interpretation (or serial 595 decoding), and they all must have several decoding lines, and signaling interface data line wants a lot.
2, the LED screen body of the LED display body that Penetration ration is high as strip and grid can only do static mode, can not scan, and waste drive IC is difficult to reduce brightness of display screen at Code in Hazardous Special Locations, adds the energy consumption of power supply;
3, the design of LED display module of the prior art, limit LED display particularly grid screen density, the signal wire of traditional module is many, and interface occupies and causes the limited space of LED display module more.
Summary of the invention
In order to solve the signaling interface data line complexity that dynamic scan module in prior art needs row decoding IC to cause, cost increase, interface takes up room comparatively greatly and the luminous problem being difficult to reduce brightness of static drive, the present invention proposes a kind of LED scan control display unit, the row decoding IC of scanning logic block is improved to and uses the row cutting IC of LED drive module to replace by this LED display module, line scanning control signal is added to show in data line and transmits, row cutting IC is utilized to realize the decoding function of row decoding IC, take full advantage of drive IC and to avoid decoding IC interface line too much, the problem that LED display modular volume is larger.
The technical solution used in the present invention is, design a kind of LED scan control display unit, comprise: Logic control module, LED drive module, field effect transistor array and LED array, described LED drive module comprises row drive IC and row cutting IC, and line scanning control signal is added to show in data line and transmits by described row cutting IC.
Further, described Logic control module is fpga logic control module.
The row decoding IC of LED scanning logic block in prior art is improved to the row cutting IC replacement using LED drive module by the present invention, and (LED drive IC is constant current or constant-voltage LED drive IC, non-PWM drive IC), line scanning control signal is added to show in data line and transmits, utilize row cutting IC to realize the decoding function of originally row decoding IC, take full advantage of drive IC and avoid that decoding IC decoding line is too much, wiring is complicated and the large problem that takes up room.The present invention by the control signal of line scanning control line is merged into display data line signal inside go, simplify design and the wiring of module, solve the restriction of highly dense screen body, bar screen qualifying grid screen, make LED display can be closeer than what originally did, save more drive IC, production and use cost are reduced all greatly.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of prior art LED scan control display unit;
Fig. 2 is the structured flowchart of LED scan control display unit of the present invention;
Fig. 3 is the fundamental diagram of prior art LED scan control display unit;
Fig. 4 is the fundamental diagram of LED scan control display unit of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described further.
As shown in Figure 1, prior art LED scan control display unit comprises: fpga logic control module, LED drive module, scanning logic block, MOSFET field effect transistor array and LED array, wherein LED drive module is row drive IC, and scanning logic block is row decoding IC.
LED scan control display unit of the present invention comprises as shown in Figure 2: fpga logic control module, LED drive module, MOSFET field effect transistor array and LED array, wherein LED drive module comprises row drive IC and row cutting IC, line scanning control signal is added to show in data line and transmits by row cutting IC, utilizes row cutting IC to instead of row decoding IC thus eliminates scanning logic block.
As shown in Figure 3, for n in prior art capable × n column scan controls the fundamental diagram of display unit, LED drive module uses LED array drive IC, and scanning logic block uses row decoding IC.Its principle of work is that image/video data are input to LED drive module through signal output interface row decoding enable line and display data line thus light LED array of display after the process of fpga logic control module.More clear in order to make principle state, existing with 16 row × 16 row, namely 16 sweep its principle of work is described.At CLK(clock) rising edge come before, the data input pin that data (low and high level) are input to row drive IC will be shown, after CLK rising edge arrives, data are moved in the shift register of row drive IC, after having moved n CLK pulse, just the data of the first row are all moved, latch(latch in signal input interface) n of a first row data are driven inside register to being latched in row drive IC, export ABCD signal by the signal output interface of Logic control module simultaneously and show the row decoding IC of module the MOSFET(Metal-Oxide Semiconductor field effect transistor of the first row to LED) open, last OE signal (output enable end signal) is opened, 16 pixel datas are shown by LED, the first row display simultaneously, Logic control module continues through CLK signal again, SDI(series display data line) data are moved in the shift register of row drive IC, the first row data have shown rear closedown OE signal, latch latch data.The signal output interface of logic control element exports the row decoding IC of ABCD signal to LED display module, opens the second row MOSFET and manages, then open OE signal, show the view data of the second row, by that analogy, and completed percentage dynamic scan.
As shown in Figure 4, for n of the present invention capable × fundamental diagram of n row LED scan control display unit, more clear in order to make principle state, now to arrange with 16 row × 16, namely 16 sweep its principle of work is described.In the present invention, LED drive module uses LED array drive IC, and line scanning control signal is added to show in data line and transmits by the present invention, utilizes row cutting IC to realize the decoding function of row decoding IC originally, does not therefore need scanning logic block.Its principle of work passes through SDI, the first row data are transferred in the shift register of row drive IC and by (1000 by CLK signal, 0000, 0000, 0000) 16 bit data are transferred on the row cutting IC of the capable switch of management MOSFET, simultaneously, latch latch signal, inside latches data to the driving register of row drive IC and row cutting IC, successively row cutting IC and row drive IC is opened again by the enable OE signal of decoding and OE signal, make ranks open-minded in order, display the first row data, while display the first row data, again by the second row data by the SCK in drive IC, SDI is transferred in the shift register of row drive IC and by (0100, 0000, 0000, 0000) 16 bit data are transferred on the row cutting IC of the capable switch of management MOSFET, the first row data have shown rear closedown OE signal, latch latch data.Successively open the enable OE signal of decoding again, OE Signal aspects second row data, by that analogy, complete 16 row × 16 and arrange, be i.e. 16 dynamic scans swept.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (2)
1. a LED scan control display unit, comprise: Logic control module, LED drive module, field effect transistor array and LED array, it is characterized in that, described LED drive module comprises row drive IC and row cutting IC, and line scanning control signal is added to show in data line and transmits by described row cutting IC.
2. LED scan control display unit as claimed in claim 1, it is characterized in that, described Logic control module is fpga logic control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610092750.5A CN105528991A (en) | 2016-02-19 | 2016-02-19 | LED scanning control display unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610092750.5A CN105528991A (en) | 2016-02-19 | 2016-02-19 | LED scanning control display unit |
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| CN105528991A true CN105528991A (en) | 2016-04-27 |
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| CN201610092750.5A Pending CN105528991A (en) | 2016-02-19 | 2016-02-19 | LED scanning control display unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107749271A (en) * | 2017-10-30 | 2018-03-02 | 合肥集创微电子科技有限公司 | Drive circuit and driving method for LED display |
| CN112397018A (en) * | 2020-12-15 | 2021-02-23 | 深圳市大族元亨光电股份有限公司 | Control method, system and terminal of motion display screen |
| CN117079577A (en) * | 2023-10-18 | 2023-11-17 | 惠科股份有限公司 | Display panel, driving method of display panel and display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040108983A1 (en) * | 2002-12-09 | 2004-06-10 | Chien-Fu Tseng | LED display and method for driving the same |
| CN202120528U (en) * | 2011-05-30 | 2012-01-18 | 西安理工大学 | 16*16 light emitting diode (LED) dot matrix display screen |
| CN202142275U (en) * | 2011-06-20 | 2012-02-08 | 西安理工大学 | Dot matrix display screen |
| CN203179469U (en) * | 2013-01-08 | 2013-09-04 | 深圳市易事达电子股份有限公司 | LED panel scanning line blanking circuit |
| CN103295526A (en) * | 2013-06-09 | 2013-09-11 | 南车株洲电力机车研究所有限公司 | Light emitting diode (LED) display control system and method thereof |
| CN105185325A (en) * | 2015-08-12 | 2015-12-23 | 深圳市华星光电技术有限公司 | Liquid crystal display driving system and driving method |
-
2016
- 2016-02-19 CN CN201610092750.5A patent/CN105528991A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040108983A1 (en) * | 2002-12-09 | 2004-06-10 | Chien-Fu Tseng | LED display and method for driving the same |
| CN202120528U (en) * | 2011-05-30 | 2012-01-18 | 西安理工大学 | 16*16 light emitting diode (LED) dot matrix display screen |
| CN202142275U (en) * | 2011-06-20 | 2012-02-08 | 西安理工大学 | Dot matrix display screen |
| CN203179469U (en) * | 2013-01-08 | 2013-09-04 | 深圳市易事达电子股份有限公司 | LED panel scanning line blanking circuit |
| CN103295526A (en) * | 2013-06-09 | 2013-09-11 | 南车株洲电力机车研究所有限公司 | Light emitting diode (LED) display control system and method thereof |
| CN105185325A (en) * | 2015-08-12 | 2015-12-23 | 深圳市华星光电技术有限公司 | Liquid crystal display driving system and driving method |
Non-Patent Citations (1)
| Title |
|---|
| 刘频: "基于AT91M42800A的LED显示系统设计", 《单片机与嵌入式系统应用》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107749271A (en) * | 2017-10-30 | 2018-03-02 | 合肥集创微电子科技有限公司 | Drive circuit and driving method for LED display |
| CN107749271B (en) * | 2017-10-30 | 2023-11-03 | 合肥集创微电子科技有限公司 | Driving circuit and driving method for LED display device |
| CN112397018A (en) * | 2020-12-15 | 2021-02-23 | 深圳市大族元亨光电股份有限公司 | Control method, system and terminal of motion display screen |
| CN117079577A (en) * | 2023-10-18 | 2023-11-17 | 惠科股份有限公司 | Display panel, driving method of display panel and display device |
| CN117079577B (en) * | 2023-10-18 | 2024-03-19 | 惠科股份有限公司 | Display panel, driving method of display panel and display device |
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Application publication date: 20160427 |
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| RJ01 | Rejection of invention patent application after publication |