Method and Apparatus for Measuring Liquid Crystal Cell Properties
- Summary
- A new technology for measuring liquid crystal (LC) cell properties is invented. Optical properties and characteristics of LC cells including cell gap, twist angle and rubbing directions of a liquid crystal cell can therefore be measured. They are important parameters for the operation of a liquid crystal display (LCD). The invention allows measurement of cell gaps of both empty and filled cells, and comparison of cell thickness before and after LC filling. It will save considerable manufacturing time and materials, and improve the yield for LCD manufacturers.
- Technology Benefits
- 1. Allows measurement of cell gaps even for filled cells
2. Allows comparison of cell thickness before and after LC filling which is dependant on a lot of process parameters
- Technology Application
- - Manufacturing of liquid crystal displays (LCDs)
- Supplementary Information
- Patent Number: US6081337A
Application Number: US199872558A
Inventor: Kwok, Hoi Sing | Tang, Shu Tuen
Priority Date: 5 May 1998
Priority Number: US6081337A
Application Date: 5 May 1998
Publication Date: 27 Jun 2000
IPC Current: G01B001114 | G01J000404 | G02F000100 | G02F000113
US Class: 356601 | 356376 | 356033 | 356036 | 356365 | 356613
Assignee Applicant: The Hong Kong University of Science & Technology
Title: Method and apparatus for measuring liquid crystal cell properties
Usefulness: Method and apparatus for measuring liquid crystal cell properties
Summary: For measuring optical characteristics such as cell gap, twist angle or birefringence product of LC cells in an LC display.
Novelty: Liquid crystal (LC) cell characteristics measurement, e.g. for cell gap or twist angle in liquid crystal cell, involves rotating analyzer to ify light transmission at preset angular position at different wavelength of light
- Industry
- Electronics
- Sub Category
- Display
- Application Date
- 5 May 1998
- Application No.
- US 09/072558
- Patent Information
- US 6081337
- ID No.
- TTC.PA.079
- Country/Region
- Hong Kong
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