Information display device capable of increasing detection speed and detection accuracy of input coordinates on display screen by detecting movement amount of electronic pen
First Claim
1. An information display device including an input section, an information display section having an electrode at least for detecting a position, a display control circuit for displaying image information on a display screen of the information display section, and a coordinate detecting section for detecting indication coordinates on the display screen pointed by the input section in accordance with a timing of detecting electrostatic coupling between the input section and a scanned electrode of the information display section, the information display device comprising:
- a movement amount detecting section which is provided at a tip end portion of the input section and detects an amount of movement of the input section on the display screen to output a movement amount detection signal;
a coordinate output section which obtains indication coordinates of the input section based on the movement amount detection signal from the movement amount detecting section of the input section and a reference point, and outputs the indication coordinates; and
a coordinate signal generating section which outputs a coordinate signal representing the indication coordinates of the input section based on the indication coordinates detected by the coordinate detecting section and the indication coordinates obtained by the coordinate output section.
1 Assignment
0 Petitions
Accused Products
Abstract
There is provided an information display device in which speed of detecting input coordinates on a display screen is increased. A coordinate detection circuit 7 detects indication coordinates at a tip end of an electronic pen 6 based on an induction voltage induced at a detection electrode of the electronic pen 6 in scanning a row electrode G and a column electrode S. A coordinate output circuit 17 obtains indication coordinates at the tip end of the electronic pen 6 based on a movement amount detection signal from a movement amount detecting section 20 of the electronic pen 6. A coordinate signal generating circuit 18 outputs an x-coordinate signal and a y-coordinate signal by combining the indication coordinates detected by the coordinate detection circuit 7 and the indication coordinates obtained by the coordinate output circuit 17. Thus by filling an interval between the indication coordinates detected by the coordinate detection circuit 7 with indication coordinates obtained by the coordinate output circuit 17, an apparent detection speed of the input coordinates can be increased.
27 Citations
18 Claims
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1. An information display device including an input section, an information display section having an electrode at least for detecting a position, a display control circuit for displaying image information on a display screen of the information display section, and a coordinate detecting section for detecting indication coordinates on the display screen pointed by the input section in accordance with a timing of detecting electrostatic coupling between the input section and a scanned electrode of the information display section, the information display device comprising:
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a movement amount detecting section which is provided at a tip end portion of the input section and detects an amount of movement of the input section on the display screen to output a movement amount detection signal; a coordinate output section which obtains indication coordinates of the input section based on the movement amount detection signal from the movement amount detecting section of the input section and a reference point, and outputs the indication coordinates; and a coordinate signal generating section which outputs a coordinate signal representing the indication coordinates of the input section based on the indication coordinates detected by the coordinate detecting section and the indication coordinates obtained by the coordinate output section. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An information display device including an input section, an information display section having an electrode at least for detecting a position, a display control circuit for displaying image information on a display screen of the information display section, and a coordinate detecting section for detecting indication coordinates on the display screen pointed by the input section in accordance with a timing of detecting electrostatic coupling between the input section and a scanned electrode of the information display section, the information display device comprising:
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a movement a mount detecting section which is provided at a tip end portion of the input section and detects an mount of movement of the input section on the display screen to output a movement mount detection signal; a coordinate output section which obtains indication coordinates of the input section based on the movement mount detection signal from the movement amount detecting section of the input section and outputs the indication coordinates; and a coordinate signal generating section which outputs a coordinate signal representing the indication coordinates of the input section based on the indication coordinates detected by the coordinate detecting section and the indication coordinates obtained by the coordinate output section. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of providing coordinates in an information display device including an input section, an information display section having an electrode at least for detecting a position, a display control circuit for displaying image information on a display screen of the information display section, and a coordinate detecting section for detecting indication coordinates on the display screen pointed by the input section in accordance with a timing of detecting electrostatic coupling between the input section and a scanned electrode of the information display section, comprising the steps of:
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detecting an amount of movement of the input section on the display screen and outputting a movement amount detection signal; obtaining indication coordinates of the input section based on the movement amount detection signal; providing a coordinate signal representing the indication coordinates of the input section based on the indication coordinates detected by the coordinate detecting section and the indication coordinates obtained from said movement amount detection signal. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification