Inventor · disambiguated record
Atsuhisa Kageyama
Also filed as: KAGEYAMA ATSUHISA
47 granted patents·3 pending applications·778 citations·filing 1991–2017
98Inventor score
Files withMATSUSHITA ELECTRIC INDUSTRIAL CO LTD44PANASONIC CORP3DOI YASUYUKI1KITANO KATSUYUKI1SOCIONEXT INC1
Top patents by PatentIndex Score
50 records- 0187US7113227B1Gradation correcting apparatus gradation correcting method and video display apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Sep 26, 2006·39 cites·20 claims
- 0284US6492921B1Device for clamping multiple signalsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Dec 10, 2002·38 cites·2 claims
- 0382US7046298B2Data signal extraction apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted May 16, 2006·24 cites·35 claims
- 0482US6373533B1Image quality correction circuit for video signalsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1998·Granted Apr 16, 2002·81 cites·13 claims
- 0580US9386291B2Video signal processing devicePANASONIC CORP·Filed 2014·Granted Jul 5, 2016·4 cites·16 claims
- 0680US6633343B2Dynamic gamma correction apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Oct 14, 2003·23 cites·10 claims
- 0777US6636229B2Gradation correction circuit, and γ correction apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Oct 21, 2003·16 cites·5 claims
- 0877US5289282AVideo signal gradation correctorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1992·Granted Feb 22, 1994·43 cites·6 claims
- 0976US10170081B2Image correction device and video content reproduction deviceSOCIONEXT INC·Filed 2017·Granted Jan 1, 2019·3 cites·24 claims
- 1075US8830398B2Resolution determination device, image processor, and image display devicePANASONIC CORP·Filed 2012·Granted Sep 9, 2014·4 cites·11 claims
- 1174US7209182B2False contour correcting apparatus and methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Apr 24, 2007·10 cites·4 claims
- 1274US5294986AVideo signal gradation corrector which prevents excessive extension of the dynamic rangeMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1992·Granted Mar 15, 1994·38 cites·4 claims
- 1373US5239378AGradation corrector with improved smoothing, signal-to-noise ratio and fast response timeMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1992·Granted Aug 24, 1993·36 cites·3 claims
- 1473US5140649AGradation correcting apparatus for correcting luminance signal in accordance with detected color signalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1991·Granted Aug 18, 1992·36 cites·4 claims
- 1570US5760840AApparatus for distinguishing between a plurality of video signal types, apparatus for automatic aspect ratio determination and television receiverMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1995·Granted Jun 2, 1998·40 cites·16 claims
- 1668US5748257APicture information detecting apparatus for a video signalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted May 5, 1998·34 cites·8 claims
- 1767US6545725B1Apparatus for identifying standard and non-standard video signalsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Apr 8, 2003·11 cites·10 claims
- 1865US5241386AVideo signal gradation corrector providing smooth correction while avoiding oscillation of a corrected output luminance signal due to noise and achieving fast response to sudden video scene changesMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1992·Granted Aug 31, 1993·25 cites·4 claims
- 1964US7034896B2Gradation correction apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Apr 25, 2006·6 cites·6 claims
- 2062US6661469B1False contour correcting apparatus and methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1999·Granted Dec 9, 2003·22 cites·10 claims
- 2158US5351141AVideo signal correction systemMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1993·Granted Sep 27, 1994·17 cites·6 claims
- 2257US6967692B1Apparatus for processing luminance signalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Nov 22, 2005·4 cites·3 claims
- 2357US6903781B2Video signal processing apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Jun 7, 2005·3 cites·9 claims
- 2457US6580464B1Color difference signal correction apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Jun 17, 2003·3 cites·12 claims
- 2557US5212545AApparatus for correcting a black level of a video signalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1991·Granted May 18, 1993·14 cites·5 claims
- 2656US5200824ALuminance signal noise suppressorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1991·Granted Apr 6, 1993·16 cites·5 claims
- 2755US5841486ACompensation voltage generating apparatus for multipicture display and video display including the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Nov 24, 1998·18 cites·9 claims
- 2855US5416533AApparatus for correcting a black level of a video signalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1992·Granted May 16, 1995·13 cites·8 claims
- 2955US5196937AContrast correction device for correcting video signal contrast by varying luminance signalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1991·Granted Mar 23, 1993·15 cites·4 claims
- 3053USRE38413EPure red color detection circuit and color compensation circuit using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Feb 3, 2004·1 cites·11 claims
- 3153US5255079AApparatus for correcting a color tone of a video signalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1991·Granted Oct 19, 1993·13 cites·15 claims
- 3252US6597407B1Contour correction circuit and contour correction methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1999·Granted Jul 22, 2003·16 cites·38 claims
- 3350US6038341AHistogram operating unit for video signalsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1998·Granted Mar 14, 2000·14 cites·5 claims
- 3450US5223927AImage signal average picture level detecting apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1991·Granted Jun 29, 1993·13 cites·3 claims
- 3549US5502508AGradation compensating apparatus for a video signalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Mar 26, 1996·11 cites·8 claims
- 3648US2008158033A1Driving device for image display systemDOI YASUYUKI·Filed 2007·Application pending·0 cites
- 3746US5920351ABlack level detecting circuit of video signalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1998·Granted Jul 6, 1999·11 cites·13 claims
- 3846US5396300AContrast correction device for correcting video signal contrast by varying luminance signalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1993·Granted Mar 7, 1995·9 cites·6 claims
- 3944US5177600ANoise reduction circuitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1991·Granted Jan 5, 1993·9 cites·3 claims
- 4044US2010020243A1Video signal processorKITANO KATSUYUKI·Filed 2008·Application pending·0 cites
- 4142US6295095B1Video signal character converting device and method of the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1999·Granted Sep 25, 2001·8 cites·7 claims
- 4241US7259599B2Semiconductor deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2004·Granted Aug 21, 2007·2 cites·10 claims
- 4341US6215529B1Gamma compensation apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1998·Granted Apr 10, 2001·8 cites·6 claims
- 4440US6252983B1Histogram generatorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1998·Granted Jun 26, 2001·7 cites·7 claims
- 4538US6064447APure red color detection circuit and color compensation circuit using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1998·Granted May 16, 2000·6 cites·11 claims
- 4638US5262862ABlack level compensation circuit for a luminance signalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1991·Granted Nov 16, 1993·6 cites·3 claims
- 4737US5959695A2-line YC separation deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Sep 28, 1999·5 cites·15 claims
- 4837US2011234622A1Color correction device and color correction methodPANASONIC CORP·Filed 2011·Application pending·0 cites
- 4933US5969771A2-line YC separation deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Oct 19, 1999·3 cites·7 claims
- 5028US5485223ANoise reducing apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Jan 16, 1996·0 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →