JP2006099273A5 - - Google Patents

Claims (12)

A coordinate input device that detects position coordinates specified on a coordinate input surface and generates coordinate information,
First specifying means for specifying the state of each indicator based on information from at least one indicator;
Second specifying means for specifying a state of the coordinate pointing based on the state of the light shielded by the coordinate instruction made by the coordinate input surface,
Based on the result specified by the first and second specifying means, the coordinate instruction whose state is specified by the second specifying means is any indicator whose state is specified by the first specifying means. or or by, determining means for determining which does not depend on any of the pointing device,
A coordinate input device comprising: If the determination means has determined to be due to either a pointing device, wherein said coordinate indicator specified state by the second specifying means identified states by the first specifying means,
And means for outputting the coordinates associated with said coordinate indicator by adding information indicating that by the pointing device specified state by the first specifying means,
If the determination means determines that said coordinate indicator specified state does not depend on any of the pointing device specified state by the first specifying means by said second specifying means,
2. The coordinates according to claim 1, further comprising means for adding information indicating that there is no pointing device whose state is specified by the first specifying means and outputting coordinates according to the coordinate instructions. Input device.   The coordinate input device according to claim 1, wherein the information from the pointing tool includes at least identification information of the pointing tool and information indicating a touchdown state. The second specifying means has at least first and second sensor units,
Each sensor unit
A light emitting element that emits light substantially parallel to the coordinate input surface;
A reflective member for retroreflecting the light;
The coordinate input device according to claim 1, further comprising: a light receiving element that detects an intensity distribution of light that is reflected by the reflecting member and arrives. The first specifying means includes a receiving means for receiving a signal transmitted from the pointing tool;
The coordinate input device according to claim 1, further comprising an analysis unit that analyzes information included in the signal received by the reception unit.   2. The coordinate input device according to claim 1, wherein the second specifying unit generates information indicating a touch-down state associated with the coordinate instruction based on a state of light shielded along with the coordinate instruction. . The determination means, the coordinate indication when said corresponding state identified by said first and second one the other within a predetermined time identifying the corresponding state of a specific means of identification means The coordinate input device according to claim 1, wherein the coordinate input device is determined to have been made by the pointing tool. The determination unit is configured such that after it is determined that the coordinate instruction is made by the pointing tool, a state in which one of the first and second specifying units does not specify the state continues for a predetermined period. The coordinate input device according to claim 1, wherein the determination result by the determination unit is invalidated. The indicator that makes the coordinate instruction is determined to be in a touch-down state with respect to the coordinate input surface when the maximum value of the light shielding ratio accompanying the coordinate instruction exceeds a predetermined threshold value. 6. The coordinate input device according to 6. Said maximum value of the ratio of the light-shielding with the coordinate indicator exceeds a predetermined threshold value, and pointing device constituting the coordinates indication when time variation of the maximum value is less than or equal to a predetermined threshold value with respect to the coordinate input surface The coordinate input device according to claim 6, wherein the coordinate input device is determined to be in a touch-down state. The maximum value of the light shielding ratio associated with the coordinate instruction exceeds a predetermined threshold, and the time change rate of the value obtained by integrating the light shielding ratio associated with the coordinate instruction in the incident angle direction of the coordinate input surface is equal to or less than the predetermined threshold value. The coordinate input device according to claim 6, wherein the coordinate input device that determines the coordinate instruction determines that the coordinate input surface is in a touch-down state. A coordinate input method for generating coordinate information by detecting a position coordinate indicated on a coordinate input surface,
A first specifying step of specifying the state of each indicator based on information from at least one indicator;
A second specifying step of specifying a state of the coordinate indicator based on the state of the light shielded by the coordinate instruction made by the coordinate input surface,
Based on the results specified by the first and second specifying steps, the coordinate instruction whose state is specified by the second specifying step is based on any indicator whose state is specified by the first specifying step. Or a determination step for determining whether or not it depends on any indicator,
A coordinate input method characterized by comprising: