CN101901570B - LED display screen module - Google Patents
LED display screen module Download PDFInfo
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- CN101901570B CN101901570B CN201010255159A CN201010255159A CN101901570B CN 101901570 B CN101901570 B CN 101901570B CN 201010255159 A CN201010255159 A CN 201010255159A CN 201010255159 A CN201010255159 A CN 201010255159A CN 101901570 B CN101901570 B CN 101901570B
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Abstract
The invention relates to the electronic display screen filed, in particular to a dot-matrix LED display screen module. The LED display screen module of the invention comprises a plurality of LEDs arranged on one surface cover set as well as a control circuit; wherein the LEDs are distributed on the surface cover set in matrix, and the distance between LED adjacent points is 11mm. The front of the surface cover set is provided with a plurality of supporting columns used for mounting a panel, and the back is provided with a plurality of supporting ridges used for mounting a base plate. The control circuit includes that all output control signals pass through an amplifying and buffering unit, a column scanning signal passes through a plurality of cascaded shifting register units for carrying out column scanning on array LED unit, a line scanning signal passes through a decoder unit and then an electronic switching tube unit for carrying out line scanning on the array LED unit, and the amplifying and buffering unit and the signal wire A of the decoder unit are also connected with a protection module unit. The LED display screen module of the invention has high compatibility, and the driving circuit of the LED display screen module is improved.
Description
Technical field
The present invention relates to the electronic display field, relate in particular to a kind of LED display module of dot matrix.
Background technology
LED display is the electronic display or the word screen that wafts again, is made up of the LED dot matrix, and the light on and off through redness or green LED come display text, picture, animation, video, and content can be changed at any time, and the each several part assembly all is the display device of modular construction.LED display can show numeral, literal, the graph image of variation; Not only can be used for indoor environment and can also be used for outdoor environment, have projector, video wall, the incomparable advantage of LCDs.LED receives extensive attention and developed rapidly, and itself has following advantage: brightness is high, WV is low, power consumption is little, miniaturization, the life-span is long, shock-resistant and stable performance.
Existing LED display module has different models, and the LED display module of different model has different LED dot spacings, to obtain the effect of different optimal visual distance.The user selects the LED display module of different model for use according to different sighting distance requirements, to obtain the purpose of optimal visual distance.Existing LED display module has 10mm, 12mm, 12.The LED dot spacing model that 5mm, 16mm etc. are different; For example: the optimal visual distance of the LED display module of the LED dot spacing of 10mm is 5 meters; And the optimal visual distance of the LED display module of the LED dot spacing of 12mm is 6 meters, and the optimal visual distance of the LED display module of the LED dot spacing of 16mm then is 8 meters.But if select the LED display module of different LED dot spacing model for use according to the sighting distance needs, not only adjustable reduces greatly the later stage, and it is also higher relatively that the hardware cost of LED display module of a plurality of models is set.In addition, the protection of the IC of the internal drive circuits in the existing LED display module is just done simple protection with signals reverse, and electrical safety performance is lower.
Summary of the invention
Therefore, the present invention is directed to the deficiency that exists in the above-mentioned prior art, propose the higher LED display module of a kind of compatibility, and the driving circuit of this LED display module is also more perfect.
Technical scheme of the present invention is:
A kind of LED display module comprises that a plurality of LED that are arranged on the cover external member and control circuit form, described LED be matrix distribution on this cover set, described LED consecutive point spacing is 11mm.
Further, described cover set front is provided with the through hole that usefulness is installed corresponding to LED, and described through hole consecutive point spacing is 11mm.Described cover set front is provided with the support column that a plurality of installation panels are used, and the back side is provided with a plurality of support ridge that base plate is used is installed.
Further; Described control circuit is after respectively exporting amplification of control signal process and buffer cell; Column scan signal is carried out column scan through the shift register cell of a plurality of cascades for the array LED unit; Line scan signals is through carry out line scanning through the electronic switch pipe unit for the array LED unit behind the translator unit again, and the a-signal line of described amplification and buffer cell and translator unit also is connected to a protection module unit.
Further, described amplification and buffer cell are 245 model chips, and described shift register cell is 595 model chips, and described translator unit is 138 model chips, and described electronic switch pipe unit is 4953 model chips.
Further, described protection module unit is that the Cext pin of a monostable trigger U1 connects a series connection RC unit and holds to Vcc, and its A pin connects the GND end; Its B pin connects the a-signal line; Its CLR pin connects Vcc end, and its Q pin connects a series connection RC unit and holds to GND, its/the Q pin resistance R 3 to GND of connecting holds.Further preferred, described monostable trigger U1 is 123 model chips.
Further, described LED is monochromatic LED.
Further preferred, described LED is the LED of red, green, blue, Huang, green grass or young crops, purple or white light.
The present invention adopts as above technical scheme, and the breakthrough dot spacing of selecting 11mm for use and propose a kind of improved LED display module can obtain the more wide in range optimal visual distance scope between 5 meters to 8 meters.Only need a LED display module of the present invention just compatible 10mm, 12mm, 12.The optimal visual distance scope of the LED display module of the LED dot spacing model that 5mm, 16mm etc. are different.Simultaneously, LED display module of the present invention has also reduced use and the quantity of LED of the material of PCB, therefore, has reduced material cost.Meanwhile, LED display module of the present invention adds newly-designed IC holding circuit on driving circuit, and work that can better protection IC is a kind of durable LED display module of stablizing.
Description of drawings
Fig. 1 a is the front schematic view of cover set of the present invention;
Fig. 1 b is the north synoptic diagram of cover set of the present invention;
Fig. 2 is a schematic block circuit diagram of the present invention;
Fig. 3 is the circuit theory diagrams of protection module of the present invention.
Embodiment
Combine accompanying drawing and embodiment that the present invention is further specified at present.
LED display module of the present invention comprises that a plurality of LED that are arranged on the cover external member and control circuit form, described LED be matrix distribution on this cover set, described LED consecutive point spacing is 11mm.Preferably, described LED is monochromatic LED.Described LED can be the LED of red, green, blue, Huang, green grass or young crops, purple or white light.
Consult shown in Fig. 1 a and Fig. 1 b, described cover set 1 front is provided with the through hole 101 that usefulness is installed corresponding to LED, and described through hole 101 consecutive point spacings are 11mm.Described cover set 1 front is provided with the support column 102 that a plurality of installation panels are used, and the back side is provided with a plurality of support ridge 103 that base plate is used is installed.
Consult shown in Figure 2; Described control circuit 2 is after respectively exporting amplification of control signal process and buffer cell 201; Column scan signal is carried out column scan through the shift register cell of a plurality of cascades 202 for array LED unit 205; Line scan signals is through carry out line scanning through electronic switch pipe unit 204 for array LED unit 205 behind the translator unit 203 again, and the a-signal line of described amplification and buffer cell 201 and translator unit 203 also is connected to a protection module unit 206.Preferably; Described amplification and buffer cell 201 are 245 model chips, and like the 74HC245 chip, described shift register cell 202 is 595 model chips; Like the 74HC595 chip; Described translator unit 203 is 138 model chips, and like the 74HC138 chip, described electronic switch pipe unit 204 is 4953 model chips.
Above-mentioned control circuit 2 principles are: utilize single-chip microcomputer or microcomputer as the derived digital signal Control work, mainly contain row decoding signal (R), column decoding signal (A, B, C, D), clock signal (SCLK), latch signal (SLK), row enable signal (OE).These signals are connected on each control chip after 74HC245 amplifies and cushions.The 14th pin (serial input pin), SCLK, SLK that the R signal is received first 74HC595 meet each 74HC595; The 9th pin of first 74HC595 (serial signal output pin) connects the 14th pin (serial input pin) of next 74HC595, realizes the cascade of 74HC595 like this.And the 2-9 pin of 74HC595 goes out defeated pin as column signal, receives the row of control LED on the negative pole of each LED.A-signal is received the 6th end that enables of 74HC138 behind monostable 74HC123.The work of control 74HC138.And A, B, C signal through 74HC245 amplify and buffering after be connected in the three ends decoding input and subordinate's level townhouse pin of code translator 74HC138.A, B, C signal have been received on 4953 the G end after 74HC138 decoding, the capable work of control LED.
Consult shown in Figure 3; Described protection module unit 206 is that the Cext pin (14 pin) of a monostable trigger U1 connects the series connection RC unit be made up of resistance R 1 and capacitor C 1 and holds to Vcc; Its A pin (1 pin) connects the GND end, and its B pin (2 pin) connects the a-signal line, and its CLR pin (3 pin) connects the VGG end; Its Q pin (13 pin) connects the series connection RC unit is made up of resistance R 2 and capacitor C 2 and holds to GND, its/Q pin (4 pin) resistance R 3 to GND of connecting holds.Further preferred, described monostable trigger U1 is 123 model chips, like the 74HC123 chip.
The principle of work of above-mentioned protection module unit 206 is: 74HC123 is a monostalbe trigger.Its R9C2 and C1 termination resistance and electric capacity regularly, i.e. decision trigger the single pulse width that back Q end produces.Rbar (3,11) is the low level return-to-zero, is high level when not doing return-to-zero.Abar (1,9) is that negative edge triggers input end, triggers with negative pulse through Abar, and the time spent does not keep high level.B (2,10) is that rising edge triggers input end, triggers with positive pulse through B, and the time spent does not put low.Q (5,13) and Qbar (4,12) export positive and negative timing monopulse respectively.The monostable trigger effect is to last long regardless of trigger pip in the device, only fixedly keeps given a period of time of peripheral capacitance-resistance and just recovers to trigger preceding state, and peripheral resistance capacitance determines the monostable time, is by edge-triggered because trigger, and rises or negative edge.Can trigger monostable difference again and be monostable after last time triggering recover to trigger before state and when trigger pip is arranged; Can trigger monostable will the beginning to continue to keep the given monostable time of capacitance-resistance triggering the edge again, and monostable be to ignore trigger pip after upset.
Although specifically show and introduced the present invention in conjunction with preferred embodiment; But the those skilled in the art should be understood that; In the spirit and scope of the present invention that do not break away from appended claims and limited; Can make various variations to the present invention in form with on the details, be protection scope of the present invention.
Claims (8)
1. LED display module; Comprise a plurality of LED and the control circuit composition that are arranged on the cover external member; Described LED is that matrix distribution is on this cover set; It is characterized in that: described LED consecutive point spacing is 11mm; Described control circuit (2) is after respectively exporting amplification of control signal process and buffer cell (201); Column scan signal is carried out column scan through the shift register cell (202) of a plurality of cascades for array LED unit (205), passes through electronic switch pipe unit (204) again behind the line scan signals process translator unit (203) and carries out line scanning for array LED unit (205), and described amplification and buffer cell (201) also are connected to a protection module unit (206) with the a-signal line of translator unit (203).
2. LED display module according to claim 1 is characterized in that: described cover set (1) front is provided with the through hole (101) that usefulness is installed corresponding to LED, and described through hole (101) consecutive point spacing is 11mm.
3. LED display module according to claim 1 is characterized in that: described cover set (1) front is provided with the support column (102) that a plurality of installation panels are used, and the back side is provided with a plurality of support ridge (103) that base plate is used is installed.
4. LED display module according to claim 1; It is characterized in that: described amplification and buffer cell (201) are 245 model chips; Described shift register cell (202) is 595 model chips; Described translator unit (203) is 138 model chips, and described electronic switch pipe unit (204) is 4953 model chips.
5. LED display module according to claim 1; It is characterized in that: described protection module unit (206) is that the Cext pin of a monostable trigger U1 connects a series connection RC unit and holds to Vcc; Its A pin connects the GND end, and its B pin connects the a-signal line, and its CLR pin connects the Vcc end; Its Q pin connects a series connection RC unit and holds to GND, its/the Q pin resistance R 3 to GND of connecting holds.
6. LED display module according to claim 5 is characterized in that: described monostable trigger U1 is 123 model chips.
7. LED display module according to claim 1 is characterized in that: described LED is monochromatic LED.
8. LED display module according to claim 7 is characterized in that: described LED is the LED of red, green, blue, Huang, green grass or young crops, purple or white light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010255159A CN101901570B (en) | 2010-08-11 | 2010-08-11 | LED display screen module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010255159A CN101901570B (en) | 2010-08-11 | 2010-08-11 | LED display screen module |
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| Publication Number | Publication Date |
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| CN101901570A CN101901570A (en) | 2010-12-01 |
| CN101901570B true CN101901570B (en) | 2012-10-17 |
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| CN201010255159A Expired - Fee Related CN101901570B (en) | 2010-08-11 | 2010-08-11 | LED display screen module |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US8941215B2 (en) * | 2012-09-24 | 2015-01-27 | LuxVue Technology Corporation | Micro device stabilization post |
| US8835940B2 (en) | 2012-09-24 | 2014-09-16 | LuxVue Technology Corporation | Micro device stabilization post |
| CN108735137B (en) * | 2017-06-07 | 2022-03-22 | 浙江苏泊尔家电制造有限公司 | Circuit system for household appliance display screen and cooking appliance |
| CN108109578B (en) * | 2017-12-06 | 2020-11-10 | 海尔优家智能科技（北京）有限公司 | Circuit and method for controlling LED display |
| CN113920922A (en) * | 2021-03-02 | 2022-01-11 | 深圳高鼎通信息技术有限公司 | Column driving chip-based dynamic scanning system of common-anode LED display screen and implementation method |
| CN113012633A (en) * | 2021-03-02 | 2021-06-22 | 深圳高鼎通信息技术有限公司 | Point-to-point correction system of common-sun LED display screen and implementation method thereof |
| CN112926524B (en) * | 2021-03-30 | 2022-07-22 | 厦门天马微电子有限公司 | Display panel and display device |
| CN113220257A (en) * | 2021-05-21 | 2021-08-06 | 中国第一汽车股份有限公司 | LED display device |
| CN113393784A (en) * | 2021-07-01 | 2021-09-14 | 深圳市新光芯制器件有限公司 | Digital display billboard |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4989220B2 (en) * | 2003-06-26 | 2012-08-01 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Integrated display device |
| CN200986786Y (en) * | 2006-08-28 | 2007-12-05 | 曹致勉 | LED display screen module with external pixel spacing 16-20mm earth wire |
| CN100461234C (en) * | 2007-03-27 | 2009-02-11 | 天津市数通科技有限公司 | High-density static LED display screen of monoboard circuit structure |
| CN201041716Y (en) * | 2007-05-25 | 2008-03-26 | 天津光电星球阳光显示技术有限公司 | Full color LED display screen |
| CN201307381Y (en) * | 2008-10-21 | 2009-09-09 | 深圳市艾比森实业有限公司 | A LED display screen module with pixel pitch of 10.66mm |
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