Asynchronous graphics LED display control technology what

Time:2019-01-08 Views:147

About asynchronous by Lord of LED display, no, actually asynchronously refers to the LED screen has the ability of storage and automatic playing, editing good words and no grayscale images in PC via a serial port or network interface to other LED screen, and then by LED offline automatic playback, generally no more than grayscale display ability, is mainly used to display text and simple graphics, can screen connected to the Internet.The main control PC will display the information and various control commands through serial communication mode into the in-screen control board, the in-screen control board contains single-chip microcomputer and memory, the in-screen control board will store the information, and then display on the screen according to the command.

It mainly includes:

1) adapter

The upper computer adopts the serial port RS232 protocol and goes online through the rs232-rs485 adapter. The adapter is of optical isolation type.

(2) the control panel

Receiving the information to be displayed and various control commands transmitted by PC through serial communication, the control board contains single chip microcomputer and memory, the control board in the screen stores the information, and then displays it on the screen according to the command.Features are as follows:

Ø longitudinal points within 128, lateral points to 2000 points.If the vertical is 16, the horizontal is 4000.

Ø mass storage support secondary character Chinese font and a large number of proprietary type, storage capacity of 16

Ø can be controlled by computer, can also be offline

Ø information can be saved when the power is 1 year

Ø have real-time calendar clock function

(3) single network cable (four cores)

Four wire system: a pair of differential twisted pair receiving, another pair of differential twisted pair sending.Communication distance 1200 meters.The bus type networking structure is adopted, with a maximum load of 32 lower computers

(4) the upper computer programming software

Special communication screen LED program programming software, in accordance with the LED graphics and text screen control protocol.It is suitable for editing and broadcasting text and image programs of monochrome or dual-base LED display screen of different length and width.Send up to 16 ACTS at a time.

5. LED graphic and text screen control protocol

Ø support this agreement dot-matrix LED display monochrome, double colors by networking.

Ø networking form as the main line, PC to PC, under a machine for single chip microcomputer in the LED display panel.Four-wire system is adopted, and the online protocol is RS485.

Ø PC by RS232 serial port protocol adapter converting online.

Ø support TCP/IP protocol transmission

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