Input-capable display device

• US 7,633,566 B2
• Filed: 12/14/2007
• Issued: 12/15/2009
• Est. Priority Date: 01/30/2007
• Status: Active Grant

• Current Assignee: Japan Display West Incorporated (Japan Display Incorporated)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Ushiki, Takeyoshi, Fujikawa, Yoichi, Koshihara, Takeshi, Utsunomiya, Sumio
• Primary Examiner(s): Nguyen; Dung
• Assistant Examiner(s): DUONG, TAI V
• Application Number:
  US11/956,385
• Publication Number:
  US 20080180584A1
• Time in Patent Office: 732 Days
• Field of Search: 349/12, 349/96, 349/110, 349/111, 349/139, 349/141, 349/162, 345/104, 345/173, 345/174, 345/179, 359/486
• US Class Current: 349/12
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

An input-capable display device includes a first substrate a second substrate, a detection electrode, a dielectric film, and a detector. A pair of electrodes that drive a liquid crystal layer are provided on the first substrate. The second substrate is opposed to the first substrate through the liquid crystal layer. The detection electrode and the dielectric film are laminated on an outer surface of the second substrate. The detector detects a position at which an electrostatic capacitance is formed with the detection electrode through the dielectric film. The second substrate includes a shield conductor that is provided on a side adjacent to the liquid crystal layer. An electric potential of the shield conductor is fixed. The shield conductor has a plurality of birefringent structures that are arranged in a stripe.

Claims

1. An input-capable display device comprising:

a first substrate on which a pair of electrodes that drive a liquid crystal layer are provided;

a second substrate that is opposed to the first substrate through the liquid crystal layer;

a detection electrode and a dielectric film that are laminated on an outer surface of the second substrate; and

a detector that detects a position at which an electrostatic capacitance is formed with the detection electrode through the dielectric film, wherein

the second substrate includes a shield conductor that is provided on a side adjacent to the liquid crystal layer, an electric potential of the shield conductor is fixed, and the shield conductor has a plurality of birefringent structures that are arranged in a stripe.

2. The input-capable display device according to claim 1, wherein the shield conductor is provided with a coated portion that constitutes a light shielding film.

3. The input-capable display device according to claim 1, wherein the shield conductor is formed of a light reflective material.

4. The input-capable display device according to claim 1, wherein the shield conductor is formed of a light absorption material.