Inventor · disambiguated record
Gim Eng Chew
Also filed as: CHEW GIM E · CHEW GIM-ENG
43 granted patents·7 pending applications·242 citations·filing 2005–2025
97Inventor score
Files withPIXART IMAGING INC22AVAGO TECH ECBU IP SG PTE LTD15THOR CHUNG MIN3AVAGO TECHNOLOGIES ECBU IP PTE2AVAGO TECHNOLOGIES GENERAL IP1
Top patents by PatentIndex Score
50 records- 0197US11616503B2Optical encoder with interpolation circuitPIXART IMAGING INC·Filed 2022·Granted Mar 28, 2023·4 cites·20 claims
- 0297US11333532B1Light control circuit adapting to input signal frequency and operating method thereofPIXART IMAGING INC·Filed 2020·Granted May 17, 2022·9 cites·20 claims
- 0396US11371864B2Interpolation circuit of optical encoderPIXART IMAGING INC·Filed 2021·Granted Jun 28, 2022·6 cites·20 claims
- 0496US11108385B1Phase shifter circuit of optical encoder and operating method thereofPIXART IMAGING INC·Filed 2020·Granted Aug 31, 2021·8 cites·20 claims
- 0595US11709077B2Optical encoder with covered photo diodePIXART IMAGING INC·Filed 2021·Granted Jul 25, 2023·2 cites·13 claims
- 0693US11237024B2Optical encoder with covered photo diodePIXART IMAGING INC·Filed 2019·Granted Feb 1, 2022·5 cites·17 claims
- 0793US11073413B2Optical encoder and interpolation circuit and operating method thereofPIXART IMAGING INC·Filed 2019·Granted Jul 27, 2021·8 cites·20 claims
- 0893US10187948B1Light control circuit and optical encoder systemPIXART IMAGING INC·Filed 2018·Granted Jan 22, 2019·5 cites·20 claims
- 0991US8067992B2Temperature compensation circuit and methodCHEN ALEX JIANZHONG·Filed 2008·Granted Nov 29, 2011·43 cites·16 claims
- 1091US7609291B2Device and method for producing an enhanced color image using a flash of infrared lightAVAGO TECH ECBU IP SG PTE LTD·Filed 2005·Granted Oct 27, 2009·18 cites·19 claims
- 1190US11831320B2Optical encoder with reduced comparatorsPIXART IMAGING INC·Filed 2023·Granted Nov 28, 2023·1 cites·20 claims
- 1290US7141779B1System and method for emitting and detecting light using light emitting diodeAVAGO TECH ECBU IP SG PTE LTD·Filed 2005·Granted Nov 28, 2006·36 cites·20 claims
- 1389US7382976B1Light source having a variable focal lengthAVAGO TECH ECBU IP SG PTE LTD·Filed 2005·Granted Jun 3, 2008·18 cites·20 claims
- 1488US7435943B1Color sensor with infrared correction having a filter layer blocking a portion of light of visible spectrumAVAGO TECHNOLOGIES ECBU IP PTE·Filed 2007·Granted Oct 14, 2008·12 cites·20 claims
- 1586US7519287B2Electronic flash, imaging device and method for producing a flash of light having a rectangular radiation patternAVAGO TECH ECBU IP SG PTE LTD·Filed 2005·Granted Apr 14, 2009·11 cites·19 claims
- 1685US7400826B2Imaging device and method for producing a flash of light with pulsingAVAGO TECHNOLOGIES ECBU IP PTE·Filed 2005·Granted Jul 15, 2008·9 cites·18 claims
- 1784US8890045B2Optical encoder with a current regulating circuit for a light emitterTOH KHENG HIN·Filed 2012·Granted Nov 18, 2014·9 cites·20 claims
- 1882US12181313B2Light control circuit of optical encoder and operating method thereofPIXART IMAGING INC·Filed 2023·Granted Dec 31, 2024·0 cites·20 claims
- 1981US12174048B2Optical encoder with two index photodiodes having different width from position photodiodesPIXART IMAGING INC·Filed 2023·Granted Dec 24, 2024·0 cites·17 claims
- 2081US8330098B2High resolution, high speed, miniaturized optical encoderTHOR CHUNG MIN·Filed 2010·Granted Dec 11, 2012·5 cites·28 claims
- 2180US2025362124A1Optical encoding system with reduced total harmonic distortion by slanting slits or photodiodesPIXART IMAGING INC·Filed 2025·Application pending·0 cites
- 2278US11994416B2Signal processing circuit of anti-pollution optical encoderPIXART IMAGING INC·Filed 2023·Granted May 28, 2024·0 cites·10 claims
- 2378US7463825B2Camera flash with improved color balanceAVAGO TECH ECBU IP SG PTE LTD·Filed 2005·Granted Dec 9, 2008·6 cites·20 claims
- 2477US12025476B1Optical encoding system compensating assembly tolerancePIXART IMAGING INC·Filed 2023·Granted Jul 2, 2024·0 cites·20 claims
- 2577US7355160B2Color enhanced optical mouseAVAGO TECHNOLOGIES GENERAL IP·Filed 2006·Granted Apr 8, 2008·9 cites·20 claims
- 2677US2024361158A1Optical encoding system compensating assembly tolerancePIXART IMAGING INC·Filed 2024·Application pending·0 cites
- 2776US11774269B2Light control circuit and frequency detector of optical encoder system, and operating method of frequency detectorPIXART IMAGING INC·Filed 2022·Granted Oct 3, 2023·0 cites·18 claims
- 2875US12411005B2Optical encoding system with reduced total harmonic distortionPIXART IMAGING INC·Filed 2022·Granted Sep 9, 2025·0 cites·19 claims
- 2973US7649220B2Photodetector having dark current correctionAVAGO TECH ECBU IP SG PTE LTD·Filed 2007·Granted Jan 19, 2010·3 cites·7 claims
- 3071US7279722B2Light emitting device with adjustable reflector cupAVAGO TECH ECBU IP SG PTE LTD·Filed 2005·Granted Oct 9, 2007·4 cites·20 claims
- 3168US11740108B2Anti-pollution optical encoderPIXART IMAGING INC·Filed 2020·Granted Aug 29, 2023·0 cites·14 claims
- 3266US10462869B1Light control circuit and optical encoder systemPIXART IMAGING INC·Filed 2018·Granted Oct 29, 2019·0 cites·20 claims
- 3365US8835832B2Optical encoder with signal offset correction systemCHEW GIM ENG·Filed 2012·Granted Sep 16, 2014·2 cites·19 claims
- 3464US10728972B2Light control circuit and optical encoder systemPIXART IMAGING INC·Filed 2019·Granted Jul 28, 2020·0 cites·20 claims
- 3562US7977623B2Optical encoder with code wheel misalignment detection and automatic gain controlAVAGO TECH ECBU IP SG PTE LTD·Filed 2010·Granted Jul 12, 2011·1 cites·5 claims
- 3661US7601940B2Gain control system for visible light communication systemsAVAGO TECH ECBU IP SG PTE LTD·Filed 2007·Granted Oct 13, 2009·4 cites·18 claims
- 3755US2025231050A1Code wheel and encoding systemPIXART IMAGING INC·Filed 2024·Application pending·0 cites
- 3853US8841600B2Hysteresis-compensating interpolation circuits in optical encodersTHOR CHUNG MIN·Filed 2010·Granted Sep 23, 2014·1 cites·19 claims
- 3953US8097842B2High resolution single track optical encoderTHOR CHUNG MIN·Filed 2009·Granted Jan 17, 2012·2 cites·23 claims
- 4051US7709784B2Optical encoder with code wheel misalignment detection and automatic gain controlAVAGO TECH ECBU IP SG PTE LTD·Filed 2008·Granted May 4, 2010·1 cites·13 claims
- 4149US7879641B2Photodetector having dark current correctionAVAGO TECH ECBU IP SG PTE LTD·Filed 2009·Granted Feb 1, 2011·0 cites·13 claims
- 4248US2007057787A1Virtual display with motion synchronizationHELBING RENE P·Filed 2005·Application pending·0 cites
- 4344US8035074B2Automatic gain control for motion encoder signalsAVAGO TECH ECBU IP SG PTE LTD·Filed 2009·Granted Oct 11, 2011·0 cites·20 claims
- 4442US11171584B1Interpolation circuit and motor driving circuitPIXART IMAGING INC·Filed 2020·Granted Nov 9, 2021·0 cites·19 claims
- 4540US2007064420A1LED device with enhanced light outputNG KEE Y·Filed 2005·Application pending·0 cites
- 4639US7880657B2Interpolation accuracy improvement in motion encoder systems, devices and methodsAVAGO TECH ECBU IP SG PTE LTD·Filed 2009·Granted Feb 1, 2011·0 cites·22 claims
- 4739US2007045641A1Light source with UV LED and UV reflectorYIN CHUA JANET B·Filed 2005·Application pending·0 cites
- 4838US2006285332A1Compact LED package with reduced field angleGOON WOOI K·Filed 2005·Application pending·0 cites
- 4937US7880658B2Interpolation accuracy improvement in motion encoder systems, devices and methodsAVAGO TECH ECBU IP SG PTE LTD·Filed 2009·Granted Feb 1, 2011·0 cites·49 claims
- 5035US7732754B2Optical encoder with amplitude correctionAVAGO TECH ECBU IP SG PTE LTD·Filed 2008·Granted Jun 8, 2010·0 cites·21 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →