US 6,603,467 B1Granted

Method and apparatus for LCD panel power up test

AssigneeIndustrial Technologies Research Institute

InventorChi-Yuan Wu

Life of this patent

Estimating the term…

Loading patent…

Abstract

A power up test method and apparatus for a liquid crystal display (LCD) panel are disclosed. A power up test panel is used to perform the power up test on a LCD panel which greatly simplifies the test and reduces cost. The power up test panel includes a plurality of test electrodes formed on a substrate. The plurality of test electrodes corresponds one-on-one to a plurality of input electrodes on the LCD panel. The power up test panel makes electrical communication with a host system circuit which generates driving signals for sending to the power up test panel through a flexible film. During the power up test, the electrodes on the power up test panel and the input electrodes are matched and a pressure is applied for performing the electrical signal communication test of the LCD panel. The method is particularly suitable for the power up test of a high resolution LCD panel which has small pitch distance between input electrodes.

Claims14

Dependent claims

A method for power up testing an LCD panel by using a power up test panel wherein the panel comprises a plurality of test electrodes for contacting a plurality of input electrodes of an electrode terminal on the LCD panel, the method comprising the steps of:

depositing a metal layer on a substrate and patterning the metal layer to form a circuit terminal;
depositing an insulating layer on the metal layer and the substrate and patterning the insulation layer exposing contact windows;
depositing a photoresist layer on the insulating layer and the metal layer and patterning the photoresist layer to expose an area for forming the plurality of test electrodes;
depositing a photo-sensitive polyimide (PSPI) layer on the photoresist layer, the insulating layer and the metal layer, and patterning the PSPI layer to expose metal portions of said area;
forming the plurality of test electrodes on the exposed metal portions;
connecting each of the plurality of test electrodes to one of the plurality of input electrodes using a first connecting wire;
connecting the circuit terminal to a host system circuit using a second connecting wire for providing signal communication therein between;
and
performing the power up test by connecting each of the plurality of test electrodes on the power up test panel to one of the plurality of input electrodes on the LCD panel.

6 more elements

Dependencies are inferred from the claim text.