Image capturing function-equipped display device

• US 20060007224A1
• Filed: 05/05/2005
• Published: 01/12/2006
• Est. Priority Date: 05/31/2004
• Status: Abandoned Application

• Current Assignee: Toshiba Matsushita Display Technology (Japan Display Incorporated)
• Original Assignee: Toshiba Matsushita Display Technology (Japan Display Incorporated)
• Inventors: Nakamura, Takashi, Hayashi, Hirotaka, Ishikawa, Miyuki
• Application Number:
  US11/121,962
• Publication Number:
  US 20060007224A1
• Time in Patent Office: Days
• US Class Current: 345/207
• CPC Class Codes: G02F 1/1313 specially adapted for a particular application
• CPC Class Codes: G02F 1/13312 Circuits comprising photodetectors for purposes other than feedback
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general

Abstract

In order to allow information input using light in both the cases of strong outside light and weak outside light, two or more types of light-sensing elements having different optical sensitivities are arranged in a picture element region. For example, there are alternately arranged rows having arranged therein picture elements 21 provided with low-sensitivity light-sensing elements, and rows having arranged therein picture elements 22 provided with high-sensitivity light-sensing elements. This constitution makes it possible to perform optical information input using the high-sensitivity light-sensing elements in the case of weak outside light, and to perform optical information input using the low-sensitivity light-sensing elements in the case of strong outside light.

Claims

1. An image capturing function-equipped display device, comprising:

a picture element region including a plurality of picture elements; and

a light-sensing element provided for each picture element,

wherein two or more types of the light-sensing elements having different optical sensitivities are arranged in the picture element region.

2. The display device according to claim 1,

wherein the light-sensing elements are arranged in the picture element region such that the sensitivities thereof differ between adjacent rows.

3. The display device according to claim 1,

wherein the light-sensing elements are arranged in the picture element region such that the sensitivities thereof differ between adjacent columns.

4. The display device according to claim 1,

wherein the light-sensing elements are arranged in the picture element region such that the sensitivities thereof are varied in a checkerboard pattern.

5. The display device according to claim 1,

wherein the plurality of light-sensing elements having different sensitivities are arranged in the picture element region to constitute a magic square.

6. The display device according to claim 5,

wherein the values read from the plurality of light-sensing elements are used for a read intensity value of a picture element of interest which is contained in the magic square.

7. The display device according to claim 1,

wherein the plurality of light-sensing elements having different sensitivities are arranged in the picture element region to constitute a magic square by excluding the one with different polarity of the display.

8. The display device according to claim 7,

wherein the alternate lines are any of alternate horizontal lines, alternate vertical lines, and alternate horizontal lines and alternate vertical lines.

9. An image capturing function-equipped display device,

wherein a plurality of picture elements having a plurality of types of sensors are irregularly arranged to constitute a picture element group, the plurality of types of the sensors responding to different illuminations, and the picture element group is repeatedly arranged in a display region.

10. An image capturing function-equipped display device,

wherein a picture element range for a calculation for area coverage modulation is determined so that an arrangement efficiency of the inside of an IC becomes advantageous, and a group of picture elements belonging to positive-polarity picture elements and a group of picture elements belonging to negative-polarity picture elements are equally contained in the range.

11. The display device according to claim 10,

wherein the picture element range is a range of 16-by-16 picture elements, and the groups of the picture elements are constituted in units of four-by-four picture elements.