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Method and system for verifying drive waveform of LCD

A liquid crystal display, driving waveform technology, used in static indicators, instruments, etc.

Inactive Publication Date: 2008-01-09
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the traditional method of using an oscilloscope or a logic analyzer (Logic Analyzer) to capture the output of the STN LCD driver prototype (prototype) circuit, and visually inspecting the waveforms of the common drive line and the byte drive line one by one has been used. No longer applicable, and in the face of various complex LCD driving waveforms, how to check the waveforms in a simple way and an all-in-one verification method is the focus of the present invention

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  • Method and system for verifying drive waveform of LCD
  • Method and system for verifying drive waveform of LCD
  • Method and system for verifying drive waveform of LCD

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Embodiment Construction

[0038] FIG. 3 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 composed of N common driving lines (COM) and M byte driving lines (SEG), and N , M is a positive integer greater than 0. Please refer to Fig. 3, the verification method of the drive waveform of this STN LCD, comprises the following steps: Step 1 S110, make a STN LCD driver prototype (prototype) circuit, and output STN LCD drive waveform signal; Step 2 S120, read STN LCD driving waveform signal; Step 3 S130, calculating the DC bias value of the display pixel; and Step 4 S140, checking the DC bias value to verify the STN LCD driving waveform signal.

[0039] First, in step one S110, an STN LCD driver prototype (prototype) circuit is made earlier, for example, using a Field Programmable ...

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Abstract

A verification method for drive waveform of LCD is particular fit to TNLCD and STNLCD and comprises follows steps: first, prepare a prototype circuit for LCD driver and output drive waveform signal; then, read the signal and compute D.C. biasing value for every display pixel; finally, detect D.C. biasing values to check whether the signals are right. Thereby, on the beginning of designing prototype circuit of driver, if check out LCD drive waveform has non-predetermined D.C. biasing value f, then modify immediately the circuit design of LCD driver to achieve verification.

Description

technical field [0001] The present invention relates to a verification method and system thereof, and in particular to a verification method and system thereof for driving waveforms of TN LCD and STN LCD. 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 ( striped) electrode array, including two types of scanning electrodes and data electrodes. The above-mentioned scanning electrodes and data electrodes are used to form the driving voltage of the liquid crystal, which is used to change the inclination angle of the liquid crystal molecules, and then change the transmission of light. transparency....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
Inventor 徐世斌
Owner NOVATEK MICROELECTRONICS CORP