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Method and device for reducing electromagnetic interference using plane display

A technology of electromagnetic interference and common mode voltage, applied in static indicators, cathode ray tube indicators, instruments, etc., can solve problems affecting data integrity, affecting peripheral circuits, etc., and achieve the effect of reducing electromagnetic interference effects

Inactive Publication Date: 2008-05-14
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And unfortunately, the common mode voltage VCM is RSDS TM In the data bus circuit 10, the main source of electromagnetic interference (electromagnetic interference, EMI), the situation of electromagnetic interference will not only affect the RSDS TM The integrity of the data in the data bus circuit 10 will also affect other peripheral circuits

Method used

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  • Method and device for reducing electromagnetic interference using plane display
  • Method and device for reducing electromagnetic interference using plane display
  • Method and device for reducing electromagnetic interference using plane display

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Embodiment Construction

[0029] see Figure 4 . Figure 4 RSDS for dual bus configuration (SXGA system) TM A schematic diagram of an embodiment of a data bus circuit. similar to figure 1 RSDS in TM data bus circuit 10, Figure 4 RSDS in TM The data bus circuit 30 includes a timing controller 40 for controlling timing operations of a plurality of driver circuits 32 , 34 . The present invention uses two different sets of driver circuits 32,34. Such as Figure 4 As shown, there are a total of eight driver circuits, wherein the left side contains four driver circuits 32 (first to fourth driver circuits), and the right side contains another four driver circuits 34 (fifth to eighth driver circuits) .

[0030] The timing controller 40 can provide the first driver circuit 32 with a left start pulse SP L , and provide the fifth driver circuit 34 with a right start pulse SP R . Therefore, the RSDS of the present invention TMThe data bus circuit 30 uses a total of two start pulses. The left start p...

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PUM

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Abstract

The invention relates to a method for reducing electromagnetic interference of panel monitor in circuit clock. It includes: providing the first clock signal, which including the first positive clock signal and the first negative clock signal, the two clock signals have a phase difference about 180degrees; providing the second clock signal, including the second positive clock signal and the second negative clock signal, the phase difference between them is about 180degrees. The first positive clock signal and the second positive clock signal have a phase difference about 180degrees, and the two negative clock signals have phase difference about 180degrees.

Description

technical field [0001] The invention relates to a method and device for reducing electromagnetic interference of a flat display, in particular to a method and device for reducing electromagnetic interference of a flat display in a clock generation circuit. Background technique [0002] In various clock generating circuits, a differential signal is usually used to generate multiple clock signals. One of the applications such as figure 1 shown. figure 1 It is a known technology, the RSDS of a T-shaped structure (T-configuration) TM (Reduced Swing Differential Signaling) A schematic diagram of a data bus (data bus) 10 . such as RSDS TM Specifications (RSDS TM Introduced in Specification Revision 0.95), RSDS TM It is a signal transmission standard and a differential interface with a signal swing of about 200mV. It defines the characteristics of a signal output by a transmitter or received by a receiver, as well as the chip-to-chip interface between the flat panel timing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20G09G5/00G06F1/10
Inventor 杨智翔
Owner AU OPTRONICS CORP