Browse Prior Art Database

DEVICE FOR MEASURING OPTICAL TRANSMISSION OF IR TOUCH BEZELS

IP.com Disclosure Number: IPCOM000026207D
Original Publication Date: 1990-Oct-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 6 page(s) / 184K

Publishing Venue

Xerox Disclosure Journal

Abstract

Infra-Red (IR) touch systems are commonly used as User Interfaces for machines incorporating CRT type display devices. The IR emitters and detectors are incorporated into the display devices using a specially designed CRT bezel surround. This bezel surround serves the purposes of: protecting the IR components from physical damage, keeping them free of dust and dirt, protecting the user from electric shock, and providing an aesthetically pleasing appearance. One of the most common bezel surround designs is manufactured using a polycarbonate material in an injection molding process. It is important in the manufacturing process to not only control dimensions and texture of the bezel surround, but also its optical characteristics. Unfortunately, while means exist to measure the raw material transmission of the IR spectrum and evaluate the aesthetic quality of the texture, there is no previously established method of measuring the optical performance of the textured bezel surround in a manner consistent with the application.

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 56% of the total text.

Page 1 of 6

XEROX DISCLOSURE JOURNAL

DEVICE. FOR MEASURING Proposed Classification OPTICAL TRANSMISSION OF IR
TOUCH BEZELS
Randall R. Hube
Perry Mitchell

U.S. C1.356/400 ht. C1. GOlb 11/00

6b

FIG. I

XEROX DISCLOSURE JOURNAL Vol: 15 No. 5 September/October 1990 361

[This page contains 1 picture or other non-text object]

Page 2 of 6

DEVICE FOR MEASURING OPTICAL TRANSMISSION OF IR TOUCH BEZELS(Cont'd)

TO FIG.2b

I I I

36

20 I-- (

26a

4a

\

\

22

4b

- TO FIG.2b -1

I

FIG. 2a

362 XEROX DISCLOSURE JOURNAL Vol. 15 No. 5 September/October 1990

[This page contains 1 picture or other non-text object]

Page 3 of 6

DEVICE FOR MEASURING OPTICAL TRANSMISSION OF IR TOUCH BEZELS(Cont'd)

I- TO FIG. 2a 32 34

iI

30a

30b

t

26 IC-TO FIG.2a

XEROX DISCLOSURE JOURNAL Vol. 15 No. 5 September/October 1990 363

[This page contains 1 picture or other non-text object]

Page 4 of 6

DEVICE FOR MEASURING OPTICAL TRANSMISSION OF IR TOUCH BEZELS(Cont'd)

Infra-Red (IR) touch systems are commonly used as User Interfaces for machines incorporating CRT type display devices. The IR emitters and detectors are incorporated into the display devices using a specially designed CRT bezel surround. This bezel surround serves the purposes of: protecting the IR components from physical damage, keeping them free of dust and dirt, protecting the user from electric shock, and providing an aesthetically pleasing appearance. One of the most common bezel surround designs is manufactured using a polycarbonate material in an injection molding process. It is important in the manufacturing process to not only control dimensions and texture of the bezel surround, but also its optical characteristics. Unfortunately, while means exist to measure the raw material transmission of the IR spectrum and evaluate the aesthetic quality of the texture, there is no previously established method of measuring the optical performance of the textured bezel surround in a manner consistent with the application.

Figure 1 depicts a device designed to test the IR transmission of bezel surround 2 as it functions in an IR Touch user interface. For each axis (a and b), the testing device utilizes an IR light emitting diode (emitter) 4a, 4b and a phototransistor (detector) 6a, 6b that are of the same type used in the touch system. The emitter - detector pairs, 4a, 6a and 4b, 6b, are mounted opposing each other in a mechanical fixture at a distance equivalent to that used in the touch system. The emitter - detector pairs can be moved parallel to the sides of the bezel surround as indicated by arrows 8a, 8b. A...