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A signal interface circuit of an LED module and an LED display device

An LED module and signal interface technology, applied in the field of LED display devices, can solve the problems of occupation cost, complicated wiring, and many connecting lines, and achieve the effects of low cost, simple cabinet wiring, and reduced connecting lines.

Active Publication Date: 2015-10-28
KONKA GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems of the signal interface circuit of the LED module in the prior art that there are many connection lines, complicated wiring, occupying more FPGA I / O resources and high cost, the present invention provides a signal interface circuit of the LED module and LED display device

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  • A signal interface circuit of an LED module and an LED display device
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  • A signal interface circuit of an LED module and an LED display device

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Embodiment Construction

[0059] Looking at modern data communication technologies, it is not difficult to find that with the increasing demand for information flow, traditional parallel interface technology has become a bottleneck for further increasing data transmission rates. In the past, SerDes, a serial communication technology mainly used in optical fiber communication, is replacing the traditional parallel bus and becoming the mainstream of high-speed interface technology.

[0060] SERDES is an abbreviation for parallel-serial and serial-parallel converter SERializer / DESerializer (serializer / parallelizer). There are two basic types of SerDes interfaces: source synchronous (SS) protocols and clock data recovery (CDR) protocols. The main difference between the two types is how clocking is implemented. A source-synchronous interface has a clock signal that accompanies the transmitted data; CDR does not have a separate clock signal, but embeds the clock in the data. i.e. the CDR receiver phase loc...

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Abstract

The invention discloses a signal interface circuit of an LED module, aiming to provide the signal interface circuit of the LED module with few connections and low cost. The signal interface circuit comprises an input socket, an output socket, a crystal oscillator, an LVDS (low voltage differential signal) interface chip, an LED lattice, a line drive circuit and a column drive circuit, wherein the line drive circuit and the column drive circuit are connected with the LED lattice; and the LVDS interface chip comprises a data differential input end connected with the input socket, a data differential output end connected with the output socket, an RGB (red, green, blue) output end, an LED scanning control signal output end, a line scanning control signal output end for outputting line scanning control signals, a Des / CDR module, a lock phase clock generation module, an RGB data interception and control signal generation module and a serializer. The invention also discloses an LED display device with the signal interface circuit and the LVDS interface chip used for the LED module. The signal interface circuit and the LED display device are suitable for various LED display screens.

Description

technical field [0001] The invention relates to the field of LED display, in particular to a signal interface circuit of an LED module and an LED display device with the signal interface circuit. Background technique [0002] In the application of LED display, the circuit connection between LED modules is a very important part. Since the 1990s, the connection between general LED modules has been using 16-20 line parallel interface technology, and its signals include shift clock SCLK , latch signal / LATCH, open signal / OE, data R[n:0], G[n:0], B[n:0], optional dummy data X[n:0], line scan signal H [m:0] and the ground wire, where the number n of RGB data groups can be 0-3, that is, 1-4 groups, and the number m of line scanning signals can be 0-3 or none according to the duty cycle, that is, in When the duty cycle is 1 / 2, 1 / 4, 1 / 8, 1 / 16 dynamic scanning is 0, 1, 2, 3 respectively, when the duty cycle is 1 static scanning, there is no line scanning signal, and the ground wire ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32G09G3/14
Inventor 魏洵佳
Owner KONKA GROUP