Display apparatus with optical input function

• US 7,924,273 B2
• Filed: 10/05/2007
• Issued: 04/12/2011
• Est. Priority Date: 11/06/2006
• Status: Expired due to Fees

• Current Assignee: Japan Display Central Incorporated (Japan Display Incorporated)
• Original Assignee: Toshiba Matsushita Display Technology Co Ltd (Japan Display Incorporated)
• Inventors: Nakamura, Hiroki, Nakamura, Takashi, Hayashi, Hirotaka, Tada, Norio, Imai, Takayuki
• Primary Examiner(s): Mengistu; Amare
• Assistant Examiner(s): SHARIFI-TAFRESHI, KOOSHA
• Application Number:
  US11/868,126
• Publication Number:
  US 20080252617A1
• Time in Patent Office: 1,285 Days
• Field of Search: 345/102, 345173-175, 348/274, 348/275
• US Class Current: 345/175
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/042 by opto-electronic means

Abstract

In making a contact determination between an object and a display screen, a display apparatus of the present invention is capable of adjusting a region on which to make a contact determination in response to the displayed image in a liquid crystal panel, so that the influence by the displayed image can be suppressed. Moreover, for simplifying the contact determination process, the display apparatus sets solid a region in the picked-up image that is not a target of the contact determination, with a predetermined gradation value.

Claims

1. A display apparatus comprising:

a display unit configured to display an image having a part that an object contacts;

a plurality of optical input units disposed in the display unit and configured to output electric signals in a magnitude corresponding to an amount of received light;

a convert unit configured to receive the signals from each optical input unit and convert the signals into gradation values to obtain a picked-up image;

a designation unit configured to designate an area in the picked-up image corresponding to the part;

a process unit configured to find a coordinate of the object in accordance with data within the designated area of the picked-up image; and

a replacement unit configured to replace a region other than the designated area in the picked-up image, with a predetermined gradation value that is a median value of the gradation in the picked-up image.