Coordinator input apparatus

• US 20070124515A1
• Filed: 06/08/2005
• Published: 05/31/2007
• Est. Priority Date: 06/08/2004
• Status: Abandoned Application

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ishikawa, Minoru, Shikina, Noriyuki
• Application Number:
  US10/557,520
• Publication Number:
  US 20070124515A1
• Time in Patent Office: Days
• US Class Current: 710/15
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G06F 3/046 by electromagnetic means
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 2310/0267 Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
• CPC Class Codes: G09G 2310/0275 Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
• CPC Class Codes: G09G 3/344 based on particles moving in a fluid or in a gas, e.g. electrophoretic devices electrophoretic devices per se G02F1/167
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

A coordinate input apparatus is constituted by a plurality of X interconnecting lines and a plurality of Y interconnecting lines disposed to intersect with each other in a matrix fashion; a closed-loop forming circuit for being electrically connected with the X interconnecting lines or the Y interconnecting lines so as to switchably connect a predetermined number of the X interconnecting lines or a predetermined number of the Y interconnecting lines to form a closed loop; and a detection circuit for detecting a signal outputted from the closed loop in response to a position indicator for indicating a position in a coordinate input area where the X interconnecting lines and the Y interconnecting lines are disposed in the matrix fashion. In the coordinate input apparatus, the closed loop is a multiple closed loop.

Claims

1. A coordinate input apparatus, comprising:

a plurality of X interconnecting lines and a plurality of Y interconnecting lines disposed to intersect with each other in a matrix fashion;

a closed-loop forming circuit for being electrically connected with the X interconnecting lines or the Y interconnecting lines so as to switchably connect a predetermined number of the X interconnecting lines or a predetermined number of the Y interconnecting lines to form a closed loop; and

a detection circuit for detecting a signal outputted from the closed loop in response to a position indicator for indicating a position in a coordinate input area where the X interconnecting lines and the Y interconnecting lines are disposed in the matrix fashion;

wherein the closed loop is a multiple closed loop.

2. An apparatus according to claim 1, wherein the closed loop includes a switch circuit for selecting first to four X interconnecting lines from the plurality of X interconnecting lines so that:

a first terminal of the first X interconnecting line is connected with a first terminal of the second X interconnecting line,

a first terminal of the third X interconnecting line is connected with a first output terminal,

a second terminal of the third X interconnecting line is connected with a second terminal of the first X interconnecting line,

a first terminal of the fourth X interconnecting line is connected with a second output terminal, and

a second terminal of the fourth X interconnecting line is connected with a second terminal of the second X interconnecting line.

3. An apparatus according to claim 2, wherein the closed loop includes a switch circuit for selecting first to four Y interconnecting lines from the plurality of Y interconnecting lines so that:

a first terminal of the first Y interconnecting line is connected with a first terminal of the second Y interconnecting line,

a first terminal of the third Y interconnecting line is connected with a first output terminal,

a second terminal of the third Y interconnecting line is connected with a second terminal of the first Y interconnecting line,

a first terminal of the fourth Y interconnecting line is connected with a second output terminal, and

a second terminal of the fourth Y interconnecting line is connected with a second terminal of the second Y interconnecting line.

4. An apparatus according to claim 1, wherein the closed loop is sequentially formed at a constant pitch on the matrix of the X and Y interconnecting lines with a lapse of time.

5. An apparatus according to claim 1, wherein on the matrix of the X and Y interconnecting lines, a closed loop formed timewise previously and a subsequent closed loop formed after the closed loop are selected to have an embedded structure.

6. An apparatus according to claim 1, wherein the coordinate input area is formed in a display panel.

7. An apparatus according to claim 6, wherein the apparatus further comprises a circuit for switching a display drive mode using the matrix of the X and Y interconnecting lines and a coordinate detection drive mode using the matrix of the X and Y interconnecting lines.

8. An apparatus according to claim 6, wherein the display panel has a memory characteristic.

9. An apparatus according to claim 8, wherein the display panel is an electrophoretic display panel.