METHOD AND APPARATUS FOR MEASURING CELL GAP OF VA LIQUID CRYSTAL PANEL

Title:

METHOD AND APPARATUS FOR MEASURING CELL GAP OF VA LIQUID CRYSTAL PANEL

Document Type and Number:

WIPO Patent Application WO/2001/022029

Kind Code:

A1

Abstract:

Light is incident at an angle with respect to a VA (vertical alignment) liquid crystal panel whose surface is perpendicular to the optical axes of the liquid crystal molecules, thus artificially producing birefringence attributed only to the liquid crystal layer. This allows the thickness (cell gap) of the VA liquid crystal to be measured accurately.

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Inventors:

AKADA TOMOHIRO (JP)
MURANO KENJI (JP)
KURAUE KOICHI (JP)

Application Number:

PCT/JP1999/005160

Publication Date:

March 29, 2001

Filing Date:

September 20, 1999

Export Citation:

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Assignee:

OTSUKA DENSHI KK (JP)
AKADA TOMOHIRO (JP)
MURANO KENJI (JP)
KURAUE KOICHI (JP)

International Classes:

G01B11/06; G01B11/14; G02F1/13; G02F1/1337; (IPC1-7): G01B11/06; G02F1/13; G02F1/1337

Foreign References:

US5734472A	1998-03-31
US5504581A	1996-04-02

Other References: