Current-type touch control liquid crystal panel and a current touch shield

• US 6,630,967 B2
• Filed: 08/17/2001
• Issued: 10/07/2003
• Est. Priority Date: 05/08/2001
• Status: Active Grant

• Current Assignee: Eturbotouch Technology Inc., Wistron Corporation
• Original Assignee: Eturbotouch Technology Inc.
• Inventors: Chen, Chi Ruey
• Primary Examiner(s): CHOWDHURY, TARIFUR RASHID
• Application Number:
  US09/931,235
• Publication Number:
  US 20020167621A1
• Time in Patent Office: 781 Days
• Field of Search: 349/12, 349/84, 345/173, 345/179, 345/87, 345/104
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0444 using a single conductive element covering the whole sensing surface, e.g. by sensing the electrical current flowing at the corners

Abstract

A current-type touch control liquid crystal panel comprises an upper substrate; a lower substrate; a gap defined by the upper substrate and the lower substrate; a polymer filled into the gap; and a current touch shield which is printed on the upper surface of said upper substrate and which is adapted to be touched by a user'"'"'s finger or a conductive member to carry out a writing or drawing operation.

Claims

1. A current-type touch control liquid crystal panel, comprising:

an upper substrate;

a lower substrate;

a gap defined by the upper substrate and the lower substrate;

a polymer filled into the gap; and

a current touch shield which is printed on the upper surface of said upper substrate and which is adapted to be touched by a user'"'"'s finger or a conductive member to carry out a writing or drawing operation;

wherein said current touch shield comprises;

a transparent or translucent conductive membrane made from Indium Tin Oxide (ITO) and printed on the upper surface of said upper substrate;

a transparent or translucent conductive protective layer printed on said conductive membrane;

a lower isolation panel printed on said periphery of the conductive protective layer;

a plurality of silver printing layers printed on the surface of said isolation panel;

a linearization panel printed on said conductive protective layer, said linearization panel being disposed on the inner edges of said silver printing layers and the four corners thereof being connected to the four connecting ends of said layers; and

an upper isolation panel printed on said silver printing layers and the linearization panel, respectively.

2. A current-type touch control liquid crystal panel as claimed in claim 1, wherein the upper substrate is a transparent polarizing plate.

3. A current-type touch control liquid crystal panel as claimed in 1, further comprising a flexible tail which includes a connecting end connected to said silver printing layer.