Browse Prior Art Database

Measurement Technique for Micro Abrasion Anti-glare

IP.com Disclosure Number: IPCOM000050851D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Perry, CH: AUTHOR

Abstract

A commercial scanning microphotometer system has the capability of generating a luminance profile for a flat surface. Components in the microphotometer system are chosen so that a luminance profile can be determined over a linear scanning distance of 10-0 mm (0.394") with a measurement diameter of 60 microns (0.0024").

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 54% of the total text.

Page 1 of 2

Measurement Technique for Micro Abrasion Anti-glare

A commercial scanning microphotometer system has the capability of generating a luminance profile for a flat surface. Components in the microphotometer system are chosen so that a luminance profile can be determined over a linear scanning distance of 10-0 mm (0.394") with a measurement diameter of 60 microns (0.0024").

If a large size plasma display panel is illuminated from the back with a 100- foot lambert light source, a luminance profile can be generated by scanning the front surface of the panel, thereby determining over a linear 10 mm distance the total light transmitted through the panel. The panel, as shown in Fig. 1, consists of opaque conductor lines formed on the back surface of the substrate glass. During such a scan, the light transmission would be periodically interrupted by the opaque metal lines on both substrates. When the scanning direction is chosen so that the 60-micron measurement diameter scans perpendicularly to the lines on the front substrate and between any two lines on the back substrate, the luminance profile illustrated by Fig. 2 is generated.

The luminance profile shown in Fig. 2 is the basic parameter for characterizing the anti-glare surface finish. Peak to peak (P) amplitude of the luminance profile is a direct measure of the degree of micro abrasion on the front surface of the panel. A panel with micro abrasion typically produces a P amplitude of 55 to 70 footlamberts in the lum...