CN209000510U - It can cascade LED display control card - Google Patents
It can cascade LED display control card Download PDFInfo
- Publication number
- CN209000510U CN209000510U CN201821768333.9U CN201821768333U CN209000510U CN 209000510 U CN209000510 U CN 209000510U CN 201821768333 U CN201821768333 U CN 201821768333U CN 209000510 U CN209000510 U CN 209000510U
- Authority
- CN
- China
- Prior art keywords
- control card
- interface
- hdmi
- led display
- cascade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The utility model relates to can cascade LED display control card.This can cascade LED display control card, including at least one control card, the control card is connect by digital visual interface and USB interface with host computer, is directly connected to, is additionally provided in control card for digital visual interface associated with the control card grade with extension with LED display by HUB interface.
Description
Technical field
The utility model relates to a kind of LED display control fields, in particular to one kind can cascade LED display control
Card.
Background technique
CN201220450599.5 disclose one kind can cascade LED display controller, its purpose is to provide one kind
Solve existing LED display control mechanism load capacity it is poor, it is at high cost and easily there is data loss problem can cascade LED
Displaying screen controller.The technical solution: this can cascade LED display controller, including at least one controller, the control
Device one end is connect with host computer, and the other end is connect with by control LED display control panel, be additionally provided on controller for expansion
The image connector and information of the controller connection of exhibition transmit interface.The disadvantages are as follows: the control in LED display control system
Fabrication is mainly used for the configuration connection to LED display.But existing controller has the following problems: (1) load capacity is poor: control
The load capacity of fabrication is related to the maximum pixel area for the display screen that it can be supported, existing control card is limited due to load capacity
System, it is difficult to meet the control of extra-large LED display screen, therefore technical staff realizes pair by using two sets or more of control card
Still after multi-stage cascade, easily there is flash-point, splashette problem in the control of extra-large LED display screen.(2) controller subtending port is more: control
Fabrication and extension control card cascade at least need a digital visual interface and a serial interface.Technical staff is in cascade operation
On be not very easy.Thus it also results in and occupies unnecessary space on circuit board.(3) multi-stage cascade transmits signal at a distance and declines
Subtract: after multi-stage cascade transmits at a distance, apparent decaying, which occurs, in the signal of digital video leads to LED display flash-point, splashette
Problem cannot achieve the cascade of 10 grades of control cards or more.
Utility model content
The purpose of the utility model is to provide one kind mainly solve existing LED display control system load capacity it is poor, control
The problem of signal attenuation that fabrication subtending port is mostly transmitted with multi-stage cascade at a distance can cascade LED display control card.This
The another object of utility model is to provide a kind of load capacity for promoting control card system, and simplifies the cascade side of control card
The cascade of control card need to only be can be realized by a digital visual interface, improve the Chief Signal Boatswain of multi-stage cascade control card for formula
LED display is caused the LED display control card of flash-point, splashette problem occur after Distance Transmission.
The technical solution of the utility model be this can cascade LED display control card, including at least one control
Card, is characterized in that, the control card is connect by digital visual interface and USB interface with host computer, passes through HUB interface
It is directly connected to, is additionally provided in control card for digital visual interface associated with the control card grade with extension with LED display.
As preferred: control card can be realized by a digital visual interface in the control card and the control card of extension
Cascade, and at least support 10 grades of cascades.
As preferred: two nonessential pins by redefining digital visual interface are used as serial ports, Lai Shixian
The serial ports of LED display control card cascades.
As preferred: the control card can be handled the HDMI signal in transmission, eliminate intersymbol interference and high frequency with
Machine shake, electrode compensation decaying, then next stage control card is sent to by digital visual interface outlet.
As preferred: the HDMI signal is come in by HDMI interface import, is divided by HDMI signal one-to-two module
Two-way HDMI signal after handling using processor, is sent wherein decoding all the way by HDMI decoding chip by HUB interface
To LED display；Another way first passes through HDMI signal processing module, handles the HDMI signal in transmission, eliminates intersymbol
Interference and shake, electrode compensation enhance signal, are finally sent to next stage control card by HDMI interface outlet again.
As preferred: the HDMI signal is come in by HDMI interface, by the processing of HDMI video signal decoding chip
Afterwards, it is transferred to processor；The processor exports two-path video signal, and signal is directly output to LED by HUB interface and shows all the way
Display screen；Another way signal, which exports, gives HDMI video signal coder, by signal processing, sends out finally by HDMI interface delivery outlet
It send to next stage control card.
As preferred: the digital visual interface being arranged in the control card is DVI interface or HDMI interface, and the USB connects
Mouth is the interface of control card Yu host computer communication, and the HUB interface is control card transmitting display data information to LED display
The interface of mould group.
Compared with prior art, the utility model has the beneficial effects that
(1) the utility model improves the load capacity of control card system, and simplifies the cascade mode of control card, only needs
The cascade that control card can be realized by a digital visual interface improves the signal long-distance transmission of multi-stage cascade control card
After cause LED display the problem of flash-point, splashette occur.
(2) the utility model LED display control system load capacity is strong, control card subtending port is few remote with multi-stage cascade
The signal of Distance Transmission is unattenuated.
Detailed description of the invention
Fig. 1 be the utility model can cascade LED display control card cascade system connection schematic diagram；
Fig. 2 is that the utility model can cascade LED display control card HDMI signal flow graph；
Fig. 3 be another embodiment of the utility model can cascade LED display control card HDMI signal flow graph；
Fig. 4 be the utility model can cascade LED display control card serial ports topological diagram；
Fig. 5 be the utility model can cascade LED display control card cascade system serial ports cascade signal flow chart；
Fig. 6 is the flow chart that the utility model realizes LED display control card cascade Mach-Zehnder interferometer method.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing:
Fig. 1, Fig. 2, Fig. 4, Fig. 5 and Fig. 6 show one embodiment of the utility model.
Refering to Figure 1, can cascade LED display control system, include that control card, host computer and LED are shown
Screen.
The cascade control card 1 is transmitted by HDMI wire and USB line and host computer connecting communication.And cascade control
Card 1 waits the control card of extensions that need to only connect completion cascade by HDMI wire with cascade control card 2.Every level-one control card is all
HDMI signal is come in, and two-way HDMI signal is divided into.HDMI signal passes through HUB interface after control Card processor processing all the way
It is sent to LED display, another way is sent to next stage control card by HDMI delivery outlet.
It please refers to shown in Fig. 2, includes HDMI interface, HDMI signal one-to-two, the unit modules such as HDMI signal processing.
The HDMI signal is come in by HDMI interface import, is divided into two-way HDMI letter by HDMI signal one-to-two module
Number, wherein being decoded all the way by HDMI decoding chip, after being handled using processor, LED is sent to by HUB interface and is shown
Screen.Another way first passes through HDMI signal processing module, handles the HDMI signal in transmission, eliminates intersymbol interference and trembles
Dynamic, electrode compensation enhances signal, is finally sent to next stage control card by HDMI interface outlet again.
The realization principle of HDMI signal processing step in Fig. 2 is as follows: utilizing clock and data recovery CDR (clock data
Recovery) technology makes it in receiving end, and the data information transmitted is not losing its integrality and the quilt in adjoint timing
It detects, and minimizes the amount of jitter for snapping into next stage control card from control.When the shake of input is in clock and data recovery CDR
PLL bandwidth in, shake will be output directly to next stage control card；And on the loop bandwidth of clock and data recovery CDR
High dither will be attenuated, to reduce the high dither from video source.Preemphasis and deweighting technique are also used, in order to
Intersymbol interference and shake are eliminated, also for loss of the compensation in the circuit that CDR bandwidth limits and caused by cable transmission.
After it have passed through HDMI signal processing, it will be apparent that improve the matter of the HDMI signal transmitted in control card cascade circuit
Amount.
It please refers to shown in Fig. 4 and Fig. 5, the serial ports cascade of the control card of the utility model, by redefining HDMI interface
13,14 pins as serial ports with (13 feet before be to do CEC function, 14 feet are spare pins).
It please refers to shown in Fig. 6, which realizes cascade control method, comprising the following steps:
(1) when control card USB interface connects host computer, usb signal switchs to rs 232 serial interface signal by MCU and is transferred in control card
Processor；
(2) processor can carry out identification judgement to the data packet in serial communication transmission, if be used to the same level control card；
It (3) is that then processor can be transferred to MCU；
(4) no, then processor will do it forwarding, be transferred to next stage control card by HDMI interface delivery outlet；
(5) when control card USB interface does not connect, the control card that HDMI interface input port can receive upper level is forwarded
Serial communication transmission in data packet, and be transferred to the processor in control card；
(6) processor can carry out identification judgement to data packet, if be used to the same level control card；
It (7) is that then processor can be transferred to MCU；
(8) no, then processor will continue to be forwarded, and be transferred to next stage control card by HDMI interface delivery outlet.
Theoretically, which can realize the cascade of infinite stages.
Fig. 1, Fig. 3, Fig. 4, Fig. 5 and Fig. 6 show second embodiment of the utility model.
Refering to Figure 1, can cascade LED display control system, include that control card, host computer and LED are shown
Screen.
The cascade control card 1 is transmitted by HDMI wire and USB line and host computer connecting communication.And cascade control
Card 1 waits the control card of extensions that need to only connect completion cascade by HDMI wire with cascade control card 2.Every level-one control card is all
HDMI signal is come in, and two-way HDMI signal is divided into.HDMI signal passes through HUB interface after control Card processor processing all the way
It is sent to LED display, another way is sent to next stage control card by HDMI delivery outlet.
It please refers to shown in Fig. 3, includes HDMI interface, HDMI decoder, HDMI encoder, the unit modules such as processor.
The HDMI signal is come in by HDMI interface, after the processing of HDMI video signal decoding chip, is transferred to
Processor, the processor export two-path video signal, and signal is directly output to LED display by HUB interface all the way；It is another
Road signal, which exports, gives HDMI video signal coder, by signal processing, is sent to finally by HDMI interface delivery outlet next
Grade control card is finally sent to next stage control card by HDMI interface outlet again.
Processor regenerates HDMI signal, using clock and data recovery CDR (clock data recovery) technology,
Make it in receiving end, the data information transmitted is not being lost its integrality and is being detected in adjoint timing, and most
Smallization snaps into the amount of jitter of next stage control card from control.
After it have passed through HDMI signal processing, it will be apparent that improve the matter of the HDMI signal transmitted in control card cascade circuit
Amount.
It please refers to shown in Fig. 4 and Fig. 5, the serial ports cascade of the control card of the utility model, by redefining HDMI interface
13,14 pins as serial ports with (13 feet before be to do CEC function, 14 feet are spare pins).
It please refers to shown in Fig. 6, which realizes cascade control method, comprising the following steps:
(1) when control card USB interface connects host computer, usb signal switchs to rs 232 serial interface signal by MCU and is transferred in control card
Processor；
(2) processor can carry out identification judgement to the data packet in serial communication transmission, if be used to the same level control card；
It (3) is that then processor can be transferred to MCU；
(4) no, then processor will do it forwarding, be transferred to next stage control card by HDMI interface delivery outlet；
(5) when control card USB interface does not connect, the control card that HDMI interface input port can receive upper level is forwarded
Serial communication transmission in data packet, and be transferred to the processor in control card；
(6) processor can carry out identification judgement to data packet, if be used to the same level control card；
It (7) is that then processor can be transferred to MCU；
(8) no, then processor will continue to be forwarded, and be transferred to next stage control card by HDMI interface delivery outlet.
The above is only the preferred embodiment of the present invention, it is all done according to the utility model claims range it is equal
Deng variation and modification, it should all belong to the covering scope of the utility model claims.
Claims (7)
1. one kind can cascade LED display control card, including at least one control card, which is characterized in that the control cartoon
It crosses digital visual interface and USB interface is connect with host computer, be directly connected to by HUB interface with LED display, in control card also
It is provided with for digital visual interface associated with the control card grade with extension.
2. according to claim 1 can cascade LED display control card, which is characterized in that the control card and extension
The cascade of control card can be realized by a digital visual interface for control card, and at least support 10 grades of cascades.
3. according to claim 2 can cascade LED display control card, which is characterized in that by redefining digital view
Two nonessential pins of frequency interface are used as serial ports, the serial ports cascade of Lai Shixian LED display control card.
4. according to claim 2 can cascade LED display control card, which is characterized in that the control card can be to transmission
In HDMI signal handled, eliminate intersymbol interference and high frequency randomized jitter, electrode compensation decaying, then connect by digital video
Mouth outlet is sent to next stage control card.
5. according to claim 4 can cascade LED display control card, which is characterized in that the HDMI signal passes through
HDMI interface import is come in, and is divided into two-way HDMI signal by HDMI signal one-to-two module, wherein decoding all the way by HDMI
Chip decoding, after handling using processor, is sent to LED display by HUB interface；Another way first passes through HDMI signal
Processing module handles the HDMI signal in transmission, and eliminating intersymbol interference and shake, electrode compensation enhances signal, finally
Next stage control card is sent to by HDMI interface outlet again.
6. according to claim 4 can cascade LED display control card, which is characterized in that the HDMI signal passes through
HDMI interface is come in, and after the processing of HDMI video signal decoding chip, is transferred to processor；The processor exports two-way
Vision signal, signal is directly output to LED display by HUB interface all the way；Another way signal, which exports, gives HDMI video signal
Encoder is sent to next stage control card finally by HDMI interface delivery outlet by signal processing.
7. according to claim 1 can cascade LED display control card, which is characterized in that be arranged in the control card
Digital visual interface is DVI interface or HDMI interface, and the USB interface is the interface of control card Yu host computer communication, described
HUB interface is interface of the control card transmitting display data information to LED display mould group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821768333.9U CN209000510U (en) | 2018-10-29 | 2018-10-29 | It can cascade LED display control card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821768333.9U CN209000510U (en) | 2018-10-29 | 2018-10-29 | It can cascade LED display control card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209000510U true CN209000510U (en) | 2019-06-18 |
Family
ID=66805951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821768333.9U Active CN209000510U (en) | 2018-10-29 | 2018-10-29 | It can cascade LED display control card |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209000510U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256084A (en) * | 2018-10-29 | 2019-01-22 | 深圳市摩西尔电子有限公司 | It can cascade LED display control card, the cascade control method of realization and HDMI signal processing method |
| CN113938630A (en) * | 2021-10-08 | 2022-01-14 | 浙江大华技术股份有限公司 | Control method of LED display screen and display screen group |
| CN114512089A (en) * | 2020-11-16 | 2022-05-17 | 北京航天耐特科技有限公司 | Display control circuit, display control method, display module and display device |
-
2018
- 2018-10-29 CN CN201821768333.9U patent/CN209000510U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256084A (en) * | 2018-10-29 | 2019-01-22 | 深圳市摩西尔电子有限公司 | It can cascade LED display control card, the cascade control method of realization and HDMI signal processing method |
| CN109256084B (en) * | 2018-10-29 | 2023-11-14 | 深圳市摩西尔电子有限公司 | Cascade LED display screen control card, control method for realizing cascade connection and HDMI signal processing method |
| CN114512089A (en) * | 2020-11-16 | 2022-05-17 | 北京航天耐特科技有限公司 | Display control circuit, display control method, display module and display device |
| CN113938630A (en) * | 2021-10-08 | 2022-01-14 | 浙江大华技术股份有限公司 | Control method of LED display screen and display screen group |
| CN113938630B (en) * | 2021-10-08 | 2024-04-26 | 浙江大华技术股份有限公司 | Control method of LED display screen and display screen group |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209000510U (en) | It can cascade LED display control card | |
| CN203574772U (en) | Device for converting single-LINK LVDS video signal into MIPI video signal | |
| CN208013943U (en) | A kind of spaceborne high-resolution imaging data transmission and acquisition system | |
| CN209695161U (en) | A kind of transmission of fujinon electronic video endoscope high-speed video and isolating device | |
| CN201726404U (en) | KVM optical transmitter and receiver. | |
| CN109497918A (en) | A kind of transmission of fujinon electronic video endoscope high-speed video and isolating device | |
| CN207560231U (en) | A kind of LED display network controller | |
| CN109256084A (en) | It can cascade LED display control card, the cascade control method of realization and HDMI signal processing method | |
| CN102917213A (en) | System and method for transmitting optical fiber video images | |
| CN105338270B (en) | A kind of modularization TV | |
| CN201655249U (en) | Integrated audio/video controller for LED display | |
| CN203574773U (en) | Device for converting LVDS video signal into 8LANE left-and-ring split screen MIPI video signal | |
| CN203691524U (en) | Device for converting double LINKLVDS video signals to MIPI video signals | |
| CN203504677U (en) | Device for converting LVDS video signal into MIPI video signal | |
| CN107566770A (en) | PG signals transmission control unit and method based on PCIe and HDMI | |
| CN206274660U (en) | A kind of processing system for video | |
| CN106878650B (en) | DVI to VGA video conversion device and method thereof | |
| US20190182531A1 (en) | Video input port | |
| CN101489075A (en) | Display signal extending apparatus and method for transmitting display signal therefor | |
| CN203015039U (en) | Wireless audio-and-video signal transmission device | |
| CN107707829A (en) | A kind of method that multiplex roles intelligence SDI video switching boxs are realized based on FPGA | |
| CN103916619B (en) | DVI video signal transmission method and device | |
| CN103037222A (en) | Compression transmission device and method of parallel digital video signal | |
| CN105304001A (en) | Signal extension box based on SERDES | |
| CN203691525U (en) | Device for converting LVDS video signal to 8LANE odd-even split screen MIPI video signals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |