Position pointing device, program, and pointed position detecting method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 13, 2004
Grant Date -
Oct 24, 2002
app pub date -
Nov 2, 2001
filing date -
Feb 16, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An objective is to provide a position pointing device, a program and a method for detecting the position pointing device which relates to a device pointing a position on a display screen and which can discriminate a scan mode of a display device and obtain information of pointed position by performing a processing corresponding to the discriminated scan mode. A photosensor (18) provided in the position pointing device detects a scanning beam from a display device (140) and generates a light detection signal. A scan mode discriminating section (30) judges that a scan mode in the display device is not a standard scan mode type, but a multi-density scan type if a frequency component of the light detection signal includes a frequency component of a horizontal synchronous signal in a multi-density scan type display device.
First Claim
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 6 Citation Count
- G09G Class
- 2.53 % this patent is cited more than
- 21 Age
