CN201576430U

Movatterモバイル変換

Info

Publication number: CN201576430U
Application number: CN2009202614318U
Authority: CN
Inventors: 李漫铁; 彭德华; 白燕林; 徐荣
Original assignee: Ledman Optoelectronic Co Ltd
Current assignee: Ledman Optoelectronic Co Ltd
Priority date: 2009-12-11
Filing date: 2009-12-11
Publication date: 2010-09-08
Anticipated expiration: 2019-12-11

Abstract

The utility model discloses an LED display module which comprises a display screen, an internet interface, a first differential circuit and a second differential circuit, wherein the first differential circuit outputs four-way signals, the input of the first differential circuit is connected with the internet interface, and the output thereof is connected with the display screen; the second differential circuit outputs eight-way signals, the input of the second differential circuit is connected with the output of the first differential circuit, and the output thereof is connected with the next cascading module. In the utility model, the signal input structure is simple, and has stronger applicability and lower cost.

Description

LED shows module

Technical field

The utility model relates to a kind of display device, relates in particular to a kind of LED and shows module.

Background technology

Prior art LED display module is general employing 1 group or several groups R, G, B data-signal+clock signal+latch signal+enable signal+earth signal on input pattern signal.Adopted 16P winding displacement 20P winding displacement mostly, quantity is many.Winding displacement is fixed with the line ball head, inserts the ox horn seat on the pcb board, reaches the transmission of signal with this.Winding displacement adopts the spacing of ph2.54mm usually, and volume is bigger, and transmission range is shorter, and limited length is 1.5M, poor anti jamming capability.

Also there is at present the correlation technique that improves the LED display performance to propose, as No. the 200810236461.3rd, disclosed Chinese invention patent application on August 26th, 2009, this application discloses a kind of Embedded Asynchronous LED display control system, it is to utilize the Ethernet interface on the embedded type CPU to communicate by letter with CF card realization big data quantity, the magnanimity information storage, utilize LCD interface on the embedded type CPU and general GPIO mouth with video information, control information and load information output on the FPGA of LED synchro system, the LED synchro system is synchronous afterwards finish information processing after, output on the display screen.

Though utilize embedded type CPU can realize than powerful, correspondingly can increase cost, also comparatively complicated, therefore, be necessary to provide a kind of on the signal input structure simple, stronger, the lower-cost LED display technology of applicability.

The utility model content

That the technical matters that the utility model mainly solves provides on a kind of signal input structure is simple, stronger, the lower-cost LED of applicability shows module.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: provide a kind of LED to show module, comprising: display screen; Network interface; Export first difference channel of four road signals, the input of described first difference channel connects described network interface, and output connects described display screen; And second difference channel of exporting eight road signals, the input of described second difference channel connects the output of described first difference channel, and the output of described second difference channel connects next stage gang mould group.

The beneficial effects of the utility model are: be different from the prior art LED display and adopt the winding displacement input mode to cause volume big, transmission range is short, poor anti jamming capability, have any different and adopt the embedded type CPU labyrinth to cause the high situation of cost in the prior art LED display, the utility model adopts the technical scheme of difference channel and network interface combination, abandoned the input pattern signal of winding displacement, link to each other because of the metal shell ground connection of network interface and with signal ground on the PCB, good shield effectiveness is arranged, meet the EMC requirement, and the differential signal that difference channel is realized further solves the problem that signal disturbs, again and input and output adopt is netting twine, netting twine is paired twisted wire, volume is less, shield effectiveness is good, further solve signal interference problem more again, simultaneously, complicated circuit structure and the expensive chip of not needing simple in structure, and on PCB layout and assembling casing, can save the space, the distance of signal transmission.

Description of drawings

Fig. 1 is the theory diagram that the utility model LED shows module;

Fig. 2 is that the utility model LED shows the chip synoptic diagram that first difference channel is adopted among module one embodiment;

Fig. 3 is that the utility model LED shows the chip synoptic diagram that second difference channel is adopted among module one embodiment.

Embodiment

By describing technology contents of the present utility model, structural attitude in detail, realized purpose and effect, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.

Display screen;

Network interface;

Export first difference channel of four road signals, the input of described first difference channel connects described network interface, and output connects described display screen; And

Export second difference channel of eight road signals, the input of described second difference channel connects the output of described first difference channel, and the output of described second difference channel connects next stage gang mould group.

Because the work of difference channel is depended on two signal wires (their signal is equivalent and reverse) and goes up the difference between the signal that compare with noise on every side, the signal that obtains is exactly the twice size of any one single-ended signal.So under all the same condition of other all situations, differential signal always has higher signal to noise ratio (S/N ratio), thereby higher performance is provided.

Difference channel is very sensitive for the difference between the signal level on the differential pair.Differential signal also has certain immunocompetence to the crosstalk couplings between EMI and the signal.Because what the transmission of module cascade signal was adopted is that netting twine (twisted-pair feeder) twists together, signal wire can be stronger to the immunocompetence of coupled noise.

To sum up, the utility model adopts the technical scheme of difference channel and network interface combination, abandoned the input pattern signal of winding displacement, link to each other because of the metal shell ground connection of network interface and with signal ground on the PCB, good shield effectiveness is arranged, meet the EMC requirement, and the differential signal that difference channel is realized further solves the problem that signal disturbs, and again and input and output adopt is netting twine, netting twine is paired twisted wire, volume is less, shield effectiveness is good, further solve signal interference problem more again, simultaneously, complicated circuit structure and the expensive chip of not needing simple in structure, and on PCB layout and assembling casing, can save the space, the distance of signal transmission.

In one embodiment, described network interface is the RJ45 interface, and the RJ45 interface is imported eight road signals: CLK+, CLK-, LE+, LE-, NOE+, NOE-, D+, D-, the metal shell ground connection of described network interface.

The signal of described first difference channel input is above-mentioned eight road signals of network interface, four road signals of described first difference channel output are respectively: CLK, LE, NOE, SDI, wherein one group connects described second difference channel by build-out resistor, another group directly connects row drive IC in the described display screen by build-out resistor, wherein data-signal SDI is serial, to the last the data output SD15 of the IC of a row control.

Wherein, described first difference channel can adopt IC FIN1032 as shown in Figure 2, and second difference channel can adopt IC FIN1031 as shown in Figure 3.Eight road input signals that eight road input pin RIN1+ of FIN1032, RIN1-～RIN4+, RIN4 connect described RJ45 interface respectively, four road output pin ROUT1～ROUT4 of FIN1032 connect display screen, also and connect four road input pins DIN1～DIN4 input pin of FIN1031, eight road output pin DOUT1+ of FIN1031, DOUT1-～DOUT4+, DOUT4-can connect next stage gang mould group.

The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.

Claims

1. a LED shows module, it is characterized in that, comprising:

Display screen;

Network interface;

2. LED according to claim 1 shows module, and it is characterized in that: described network interface is the RJ45 interface, and the RJ45 interface is imported eight road signals: CLK+, CLK-, LE+, LE-, NOE+, NOE-, D+, D-, the metal shell ground connection of described network interface.

3. LED according to claim 2 shows module, it is characterized in that: four road signals of described first difference channel output are respectively: CLK, LE, NOE, SDI, wherein one group connects described second difference channel by build-out resistor, another group directly connects row drive IC in the described display screen by build-out resistor, wherein data-signal SDI is serial, to the last the data output SD15 of the IC of a row control.

4. LED according to claim 3 shows module, and it is characterized in that: described first difference channel is IC FIN1032, and second difference channel is IC FIN1031.