IMAGE DISPLAY SYSTEM

WIPO Patent Application WO/2013/125199

A1

This invention curbs position coordinate jitter that occurs in a light pen (50) due to noise and the like. Accordingly, the light pen receives light emissions generated in a panel (10) at a y-coordinate detection subfield and an x-coordinate detection subfield, and generates a light-receiving signal. A coordinate calculating circuit (56) outputs a first x-coordinate signal and a first y-coordinate signal on the basis of the light-receiving signal. A filter circuit (44) applies a low-pass filter to the first x-coordinate signal and the first y-coordinate signal, the low-pass filter being stronger when a contact switch (53) is ON than when the contact switch (53) is OFF. A drawing circuit (46) produces a drawing signal on the basis of a second x-coordinate signal and a second y-coordinate signal outputted from the filter circuit. A plasma display device (30) displays an image on the panel on the basis of the drawing signal.

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INOUE SHINICHI
ORIGUCHI TAKAHIKO
KUWAYAMA TAKESHI

PCT/JP2013/000861

August 29, 2013

February 18, 2013

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PANASONIC CORP (JP)

G06F3/042; G09G3/20; G09G3/288; G09G3/291; G09G3/298

WO2010147704A1	2010-12-23
WO2007114115A1	2007-10-11

JP2001318765A	2001-11-16
JP2010086542A	2010-04-15
JPH09222871A	1997-08-26
JPH01234921A	1989-09-20

NAITO, Hiroki et al. (JP)
Hiroki Naito (JP)

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