Browse Prior Art Database

Proposal of the pattern for the contact check in LCD array panel

IP.com Disclosure Number: IPCOM000013547D
Original Publication Date: 2001-Oct-18
Included in the Prior Art Database: 2003-Jun-18
Document File: 5 page(s) / 73K

Publishing Venue

IBM

Abstract

Post Disclosure Text Drawings Enter any additional information relating to this disclosure below: TFT Array Panel generally has Short Ring setting its periphery to prevent from static damage.Every line(Data, Gate,) is connected with Short Ring TFT.

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Proposal of the pattern for the contact check in LCD array panel

Post Disclosure Text & Drawings

Enter any additional information relating to this disclosure below:

TFT Array Panel generally has Short Ring setting its periphery to prevent from static
damage.Every line(Data, Gate,) is connected with Short Ring TFT.

In case of Array Tester for the continuity check between Contact Probes and Terminal leads,under
the condition of Short Ring TFT is ON,electric current in Data line and Gate line is measured
after applying voltage into Short Ring.
without short Ring TFT set up,it is unable not only to conduct continuity check but also
recognize whether Contact error or Disconnected pattern.

Piling the extended Terminal leads on top of Short Ring forms Capacitance between Short Ring and
Data/Gate lines. Continuity check is conducted after inputting pulse into Short Ring and
measuring electric current though Capacitance in Data/Gate lines. As for antistatic, set up the
conductor rod between Short Ring and each line.This new process is assured to form Short Ring TFT
without difficulty and to deal with limitation of process.

1

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Conventional Pattern

measurement

Short Ring --> Contact Pad --> Measurement Circuit

2.Measure the pixel data in Data line at Measurement Circuit.

If electric current and pixel are not observed after implementation

CONTACT PROBE

GATE LINE3

GATE LINE2

GATE LINE1

CONTACT PAD DATA LINE

 ITO

 ITO

 ITO

SHORT RING TFT

1.Apply the voltag...