Integrated touch screen input device

• US 5,633,660 A
• Filed: 04/28/1995
• Issued: 05/27/1997
• Est. Priority Date: 02/12/1993
• Status: Expired due to Term

• Current Assignee: NYSE Group, Inc. (Intercontinental Exchange, Inc.)
• Original Assignee: Trinitech Systems, Inc.
• Inventors: Hansen, Peter K., Kragh, Lars
• Primary Examiner(s): Hjerpe, Richard
• Assistant Examiner(s): TRAN, VUI
• Application Number:
  US08/430,887
• Time in Patent Office: 760 Days
• Field of Search: 345/173, 345/156, 345/174, 345/175, 345/179, 345/905, 341/22, 178/18-19
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: Y10S 345/905 Display device with housing structure

Abstract

An integrated input device which comprises: a contact sensor capable of producing an analog signal indicative of the location of the position which is touched; an A/D converter capable of receiving the analog signal output from the contact sensor and converting it to a digital signal; a computer capable of receiving the digital signal output from the converter, interpreting the digital signal and transmitting a digitized video signal in response to the digital signal; a video connector capable of receiving the digitized video signal output from the computer; and a display which is capable of receiving the output from the video connector.

Claims

1. A basically horizontally disposed touch screen input device comprising:

an upper housing portion;

a horizontally disposed lower housing portion;

a touch screen disposed between said upper housing portion and said lower housing portion, wherein said touch screen is horizontally disposed, said touch screen comprising;

a glass plate having a first side;

a transparent, electrically resistive coating on the first side of said glass plate; and

a contact sheet positioned adjacent said resistive coating on the first side of said glass plate, said contact sheet having a transparent conductive coating and having separator points so that said contact sheet is not in direct contact with said resistive coating, wherein the contact sheet contacts said resistive coating when pressure is applied to said contact sheet;

a foam gasket disposed between said contact sheet of said touch screen and said upper housing portion to prevent cracking and other damage to said touch screen;

a frame support means disposed between said touch screen and said lower housing portion;

means disposed between said glass plate of said touch screen and said frame support means for insulating said glass plate from said frame support;

a display means disposed between said frame support means and said lower housing portion; and

communication means for sending signals from said touch screen to an externally disposed computer means, and for receiving signals from said externally disposed computer means.

2. The device according to claim 1, wherein said touch screen produces an analog signal indicative of a touched position on said touch screen.

3. The device according to claim 1, wherein said display means is a gas plasma display.

4. The device according to claim 3, wherein said display means is powered by a DC/DC converter.

5. The device according to claim 1, wherein said display means is a liquid crystal display.

6. The device according to claim 1, further comprising a controller circuit that is capable of impressing the voltage gradient across the resistive coating on said glass plate, alternating between the X and Y directions.