Method for testing drive wave-shape of liquid crystal display

A liquid crystal display and driving waveform technology, applied in the field of verification, to achieve the effect of speeding up the verification work

Inactive Publication Date: 2008-02-20
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the traditional method of visually checking the waveforms of the common drive line and the byte drive line is no longer applicable. In the face of various complex waveforms, how to use a simple method and an all-in-one verification method to check Waveform is the focus of the present invention
[0011] This shows that there are many defects in the verification method of the drive waveform of above-mentioned existing liquid crystal display (LCD), and urgently needs to be further improved

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  • Method for testing drive wave-shape of liquid crystal display
  • Method for testing drive wave-shape of liquid crystal display
  • Method for testing drive wave-shape of liquid crystal display

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Embodiment Construction

[0058] Below in conjunction with the accompanying drawings and preferred embodiments, the specific methods, steps, features and effects of the method for verifying the driving waveform of a liquid crystal display (LCD) according to the present invention will be described in detail as follows.

[0059] Please refer to FIG. 3 , which is a flow chart of a method for verifying driving waveforms of an STN LCD according to a preferred embodiment of the present invention. A super twisted linear liquid crystal display (abbreviated as STN LCD) has a plurality of display pixels (not shown), and these display pixels are driven by N common drive lines (COM) and M byte drive lines (SEG) , and N, M are positive integers greater than 0. Please refer to shown in Fig. 3, the verification method of the drive waveform of this STN LCD, comprises the following steps: step one S110, simulate the circuit of a STN LCD driver, and output drive waveform signal; Step two S120, read drive waveform signal...

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Abstract

The verification method is specifically suitable to twisted line type LCD and super twisted line type LCD. The method includes following steps: first, simulating a circuit of LCD drive, and outputting signal of driving waveform; then, reading out the signals of driving waveforms, and calculating value of DC bias for each displayed pixel; finally, checking up value of DC bias to validate whether signals of driving waveforms are corrective or not. Thus, in early stage of designing drive, if not arranged value of DC bias is detected, then circuit design of the drive can be modified instantly so as to reach purpose of verification.

Description

technical field [0001] The present invention relates to a verification method, in particular to a verification method of driving waveforms of TN LCD and STN LCD (A method of verification for LCD waveform). Background technique [0002] Liquid crystal displays (Liquid Crystal Display, LCD) can be divided into passive driving (Passive Matrix Liquid Crystal Display, PM LCD) and active driving (Active Matrix Liquid Crystal Display, AM LCD) according to the driving method. Common Twisted Nematic (TN) and Super Twisted Nematic (STN) liquid crystal displays are passively driven liquid crystal displays, which are driven by making long strips on the upper and lower glass substrates. The (striped) electrode array includes two types of scanning electrodes and signal electrodes, and the directions of the electrodes on the two glass substrates are 90 degrees perpendicular to each other. Generally, the signal received by the STN LCD driver IC from the scan electrode is called COM signal,...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G06F17/00G01R31/28G02F1/133
Inventor 徐世斌江明达周文彬
Owner NOVATEK MICROELECTRONICS CORP
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