Liquid crystal display panel and related device

• US 8,345,174 B2
• Filed: 05/30/2011
• Issued: 01/01/2013
• Est. Priority Date: 09/04/2006
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Wu, Jeng-Fang, Huang, Yi-Pai, Chang, Ting-Jui, Liao, Wei-Lung, Lien, Shui-Chih
• Primary Examiner(s): Robinson, Mark
• Assistant Examiner(s): TAVLYKAEV, ROBERT FUATOVICH
• Application Number:
  US13/118,497
• Publication Number:
  US 20110228187A1
• Time in Patent Office: 582 Days
• Field of Search: 349/12, 349/199, 345/173, 345/174
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

A liquid crystal display panel includes a first substrate, a second substrate, a first electrode, a second electrode, a third electrode, an isolating layer, and a conductor. The first electrode is disposed between the first substrate and the isolating layer, on which the conductor is disposed. Each of the second and third electrodes is disposed on the second substrate and includes a contact surface. The second and third electrodes are not in contact with each other and are separated by a gap. The conductor is disposed in accordance with the location of the gap.

Claims

1. A liquid crystal display (LCD) device comprising:

an LCD panel comprising;

a plurality of data lines for transmitting data signals corresponding to display images;

a plurality of gate lines for transmitting scan signals;

a first sensor signal line coupled to a first bias voltage;

a second sensor signal line coupled to a second bias voltage;

a display unit electrically coupled to a corresponding data line and a corresponding gate line for displaying images based on scan signals and data signals respectively received from the corresponding gate line and the corresponding data line; and

a detecting unit electrically coupled to the second sensor signal line, wherein the detecting unit is electrically connected to the first sensor signal line or electrically isolated from the first sensor signal line based on a touch command, and comprises;

a first storage capacitor electrically coupled to the first sensor line in response to the touch command for storing a sensing voltage received from the first sensor line; and

a first thin film transistor (TFT) switch having a control end electrically coupled to a gate line, a first end electrically coupled to the second sensor signal line, and a second end electrically coupled to the first storage capacitor; and

a signal processing circuit electrically coupled to the second sensor signal line for outputting corresponding output signals when output signals of the second sensor signal line vary.

2. The LCD device of claim 1 wherein the display unit comprises:

a second TFT switch having a control end electrically coupled to the corresponding gate line and a first end coupled to the corresponding date line;

a liquid crystal capacitor electrically coupled to a second end of the second TFT switch; and

a second storage capacitor coupled to the second end of the second TFT switch and a common voltage.

3. The LCD device of claim 1 wherein the signal processing circuit comprises an integrating circuit.