IN THE UNITED STATES PATENT AND TRADEMARK OFFICE
`
`In re Patent of:
`
`Lebens et al.
`
`U.S. Patent No.: 6,488,390
`
`
`
`Issue Date:
`
`December 3, 2002
`
`Appl. Serial No.: 09/978,760
`
`Filing Date:
`
`October 16, 2001
`
`Title:
`
`COLOR-ADJUSTED CAMERA LIGHT AND METHOD
`
`
`
`
`
`
`
`PETITION FOR INTER PARTES REVIEW OF UNITED STATES PATENT
`
`NO. 6,488,390 PURSUANT TO 35 U.S.C. §§ 311–319, 37 C.F.R. § 42
`
`
`
`
`
`Exhibit LG-1002
`
`Prosecution History of the ’390 Patent
`
`
`
`
`

`

`
`
`
`
`FILE HISTORY
`US 6,488,390
`
`6,488,390
`PATENT:
`INVENTORS: Lebens, Gary A.
`Bourn, Charles T.
`Lemaire, Charles A.
`
`TITLE:
`
`Color-adjusted camera light and method
`
`APPLICATION
`NO:
`FILED:
`ISSUED:
`
`US2001978760A
`
`16 OCT 2001
`03 DEC 2002
`
`COMPILED:
`
`06 OCT 2016
`
`Exhibit LG-1002 Page 1
`
`

`

`1
`
`I r
`
`1.
`
`"~ ii
`
`a r
`
`i
`
`.1A.
`
`I
`
`-PATENTNUMBERp
`
`8488390
`
`.433o .
`
`
`
`_ ---- .
`
`-=-
`
`r '
`
`-
`
`'i
`
`i
`
`PTO-20-4
`
`129
`
`U.S. UTILITY PATENT APPLICATION
`PATENT DATE
`O.I.P.E.
`
`c
`
`_ _S
`
`ow
`
`
`
`raEI
`cw%
`C4' '
`
`ra
`
`a
`
`SAN0NED
`
`APPLICATION NO.
`09/978760
`
`CONT/PRIOR,. CLASS
`D
`362
`
`----
`
`II
`-SUBCLASS
`
`--
`
`-
`
`yary
`
`L-e.
`
`en
`Ghares Eourn
`Lemn ire.
`CharletsLe
`
`.
`
`.J
`a-
`a.
`
`O.A.J..,
`II
`ART UNIT
`2875
`- -
`t".
`
`1-1
`
`-----
`
`m lllll
`
`Col6or - adjusted camera light: arid rnet.fha'l
`
`I ---
`
`i
`
`I
`
`1111
`I i -
`EXAMI'NER
`
`-- ----
`-- ----
`
`-M
`
`i
`
`w;~D
`
`PREPARED AND APPROVED FOR ISSUE
`
`ORIGINAL
`
`ISSUING CLASSIFICATION
`CROSS REFERENCE(S)
`
`CLASS
`
`SUBCLASS
`
`CLASS
`
`SUBCLASS (ONE SUBCLASS PER BLOCK)
`
`INTERNATIONAL CLASSIFICATION
`
`.'
`
`_
`
`Q Continued on Issue Slip inside File Jacket
`
`TERMINAL
`DISCLAIMER
`
`Sheets Drwg.
`
`DRAWINGS
`Figs. Drwg,
`
`Print Fig.
`
`CLAIMS ALLOWED
`Total Claims
`Print Claim for O.G.
`
`Sa) The term of this patent
`[ a) The term of this patent sha"
`(daie)
`subsequen! to
`has been disclaimed.
`
`.b) The term of this patent shall."'
`not extend beyond the exiraton date
`of U.S Patent. No.
`
`.
`
`, ,. ,-
`
`(Assistant Examrier)
`
`(
`
`te)
`
`NOTICE OF ALLOWANCE MAILED.
`
`Stephen Husar
`Primary Examiner
`
`ISSUEFEE
`
`Amount Due
`
`Date Paid
`
`OI c) The terminal
`months of
`this patent have been discl imed.
`
`nr)
`nument
`ga instruments Exammer)
`
`I/
`
`)
`
`ISSUE BATCH NUMBER
`
`WARNING:
`The Information disclosed herein may be restricted, Unauthorized disclosure may be prohibited by the United States Code Title 35, Sections 122; 18! and 308.
`-
`Possession outside the U.S. Patent & Trademark Office is restricted to authorized employees and contractors only.
`
`Form PTO-438A
`(Rev. 10/97)
`
`(LABEL AREA)
`
`(FACE)
`
`S1
`
`.
`
`.
`
`!'
`
`s~ j
`_, .
`
`F _
`
`i
`
`Exhibit LG-1002 Page 2
`
`

`

`6,488,390
`
`COLOR-ADJUSTED CAMERA LIGHT AND METHOD
`
`Transaction History
`
`
`Transaction Description
`Date
`10-16-2001 Workflow - Drawings Finished
`10-16-2001 Workflow - Drawings Matched with File at Contractor
`10-16-2001 Preliminary Amendment
`10-16-2001
`Information Disclosure Statement (IDS) Filed
`10-16-2001
`Information Disclosure Statement (IDS) Filed
`10-16-2001
`Initial Exam Team nn
`10-24-2001
`IFW Scan & PACR Auto Security Review
`11-16-2001 Correspondence Address Change
`11-26-2001 Application Dispatched from OIPE
`11-29-2001 Case Docketed to Examiner in GAU
`02-11-2002 Non-Final Rejection
`02-15-2002 Mail Non-Final Rejection
`06-03-2002 Terminal Disclaimer Filed
`06-03-2002 Response after Non-Final Action
`06-18-2002 Date Forwarded to Examiner
`06-19-2002 Notification of Terminal Disclaimer - Accepted
`07-12-2002 Notice of Allowance Data Verification Completed
`07-15-2002 Mail Notice of Allowance
`07-15-2002 Mail Notification of Terminal Disclaimer - Accepted
`07-19-2002 Dispatch to Publications
`07-22-2002 Workflow - File Sent to Contractor
`07-22-2002 Receipt into Pubs
`08-21-2002 Receipt into Pubs
`10-21-2002
`Issue Fee Payment Received
`10-30-2002 Application Is Considered Ready for Issue
`10-30-2002
`Issue Fee Payment Verified
`11-01-2002 Receipt into Pubs
`11-14-2002
`Issue Notification Mailed
`12-03-2002 Recordation of Patent Grant Mailed
`12-03-2002 Patent Issue Date Used in PTA Calculation
`03-07-2005 Correspondence Address Change
`03-07-2005 Correspondence Address Change
`04-26-2012 Change in Power of Attorney (May Include Associate POA)
`08-15-2012 Correspondence Address Change
`09-11-2013 Correspondence Address Change
`09-12-2013 Email Notification
`09-12-2013 Change in Power of Attorney (May Include Associate POA)
`03-07-2014 Request for Trial Granted
`04-29-2014 Termination or Final Written Decision
`06-05-2014 ENTITY STATUS SET TO UNDISCOUNTED (INITIAL DEFAULT SETTING
`OR STATUS CHANGE)
`08-13-2014 Review Certificate
`10-21-2014 Review Certificate Mailed
` 
`
`Exhibit LG-1002 Page 3
`
`

`

`OWJOo
`
`e0mo
`
`,i 09978760
`
`.
`
`jc8211.s, pTO
`J 09/978160
`Iiio101 6
`CONTENTS
`Date received
`(Incl. C. of M.)
`or
`Date Mailed
`
`(.
`
`&-53.
`
`-1-,/___
`
`.
`
`42.
`
`43:
`
`44..
`
`6.
`
`50.
`50.
`54.
`51. _
`
`52.
`
`53. _
`
`54. -:
`
`57.
`
`58._
`
`59.
`
`60.
`
`61. _
`
`62.
`
`-
`
`6 3.
`
`64.
`
`65.
`
`66.
`
`67.
`
`69.,
`
`70..
`
`71.,
`
`68.
`
`73.
`
`74.
`
`78.
`
`79.
`
`82.
`
`(IFRONT)
`
`8.
`
`10.
`
`11.
`
`12.
`
`13.
`
`14. __
`
`15.
`
`16.
`S17.
`18.
`
`19.
`
`20.
`
`21. --
`
`22.
`
`23.
`
`24.
`
`25.
`
`26.
`
`27.
`
`. 28.
`
`29.
`
`30.
`
`31.
`32.
`
`S
`
`33.
`
`"
`
`34.
`
`. 35.
`
`36.
`
`37.
`
`S 38.
`
`39.
`
`40.
`S41.
`
`• ,
`
`S
`
`i
`
`I , .
`
`INITIA
`INITIALS
`
`Date received
`(Incl. C.of M.)
`or
`Date Mailed
`
`_
`
`.
`
`.
`
`4..
`
`'__
`
`_
`
`_
`
`-.
`
`(
`
`'
`
`Exhibit LG-1002 Page 4
`
`

`

`y
`
`ISSUE SLIT
`
`S
`
`,
`
`_.. 1REA ( :" additional cross references)
`
`POSITION
`
`INITIALS
`
`ID NO.
`
`DATE
`
`FEE DETERMINATION
`O.I.P.E. CLASSIFIER
`FORMALITY REVIEW
`
`.
`
`,O./
`
`.1_/A
`
`/0 --
`
`/.
`
`'"
`
`................. Rejected
`' .........
`Allowed
`= ................................
`; (Through numeral) Canceled
`.
`................................ RestrictedJI
`
`INDEX OF CLAIMS
`................................ Non-elected
`Interference
`.................................
`................................. Appeal...
`......... Objected
`......................
`
`-..
`
`I
`
`Claim
`
`Date
`
`Claim
`
`Date
`
`O
`
`u
`110
`112
`113
`11
`115
`116
`S117
`118
`119
`10
`111
`112
`113
`114
`115
`116
`117
`118
`119
`20...
`121.
`22 .
`123.
`124'!
`125
`
`26
`127
`128
`29
`1301.
`131
`32
`3
`134
`13
`
`3 3
`
`8
`39
`40
`141
`14
`143
`
`144
`45
`46
`147
`
`14
`
`15
`
`1
`
`.
`
`.
`
`.59
`
`51
`52
`53
`S 54 (
`) 155
`
`57,
`
`'8
`
`60
`
`62
`63
`64
`65
`
`66
`
`6 6
`
`8
`69
`70
`
`71
`
`_
`
`74
`751
`76
`
`78
`79
`70
`81
`82
`83
`84 "
`
`85
`86
`87
`88
`89
`90.
`91
`92
`93
`94
`
`95
`96
`97
`98
`99
`
`IOI
`
`If more than 150 claims or 10 actions
`staple additional sheet here
`
`(LEFT INSIDE)
`
`I
`
`Claim-
`
`Date
`
`if
`
`2 3 4 .
`
`5 6 8 9 0
`
`11
`
`7-
`
`-
`
`3 4
`
`
`
`- 5
`6
`
`.i
`
`E
`
`j
`
`}1
`
`39 '9
`4 0
`
`41
`42
`43
`44
`45
`
`L46
`S 47
`
`I
`
`49
`50
`
`Exhibit LG-1002 Page 5
`
`

`

`1_
`Class
`
`3C2..
`
`I.
`
`SEARCHED
`
`SEARCH NOTES
`(INCLUDING SEARCH STRATEGY)
`
`Sub..
`
`Date
`
`Exmr.
`
`Cone ,./ L w
`
`I
`
`Date
`
`Exmr.
`
`IZ~q/
`
`'A
`
`f..
`
`I
`
`J'
`
`,i.IVI
`
`N
`
`,t A~e
`
`i L
`
`Ulf"MA
`
`" |1
`
`• A, I "
`
`'
`
`"
`
`I(~Lt,
`
`Id;
`1la
`
`fl
`l3
`
`3(5S
`
`.
`
`S3k30 7-
`
`1
`
`.1 1-1
`
`i
`
`.362
`
`I
`
`..
`
`.
`
`INTERFERENCE SEARCIED
`Exmr.
`Sub.
`Class
`Da
`
`3 4'1 ~
`
`7j?/1
`
`A
`
`1I
`
`(RIGHT OUTSIDE)
`
`K
`
`:J.
`
`Exhibit LG-1002 Page 6
`
`

`

`(12) United States Patent
`Lebens et al.
`
`(54) COLOR-ADJUSTED CAMERA LIGHT AND
`METHOD.
`
`(75)
`
`Inventors: Gary A. Lebens, Chaska, MN (US);
`Charles T. Bourn, Minnetonka, MN
`(US); Charles A. Lemaire, Apple
`Valley, MN (US)
`
`(73) Assignee: PPT Vision, Inc., Eden Prairie, MN
`(US)
`
`Notice:
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by'0 days.
`
`This patent is subject to a terminal, dis-
`claimer.
`
`(21)
`
`(22)
`
`Appl. No.: 09/978,760
`Oct. 16, 2001
`
`Filed:
`
`Related U.S. Application Data
`
`(60) Continuation of application No. 09/627,268, filed on Jul. 28,
`2000, now Pat. No. 6,305,818, which is a division of
`application No. 09/044,559, filed on Mar. 19, 1998, now Pat.
`No. 6,095,661.
`. .. ...........
`.. ... ... . .
`. . .. .
`(51)
`Int. Cl.
`......
`........... F21V 9/00
`(52) U.S. Cl. ..:..................:. 362/231, 362/184; 362/185;
`362/208; 362/183; 362/800; 362/234; 362/11;
`362/13
`(58) Field of Search ............................ 362/157, 183,
`362/159, 184, 208, 800, 249, 11, 13, 234;
`315/224, 307, 291, 312, 360, 362
`
`(56)
`
`References:Cited,
`
`U.S. PATENT DOCUMENTS
`
`3,069,654 A
`3,663,752 A ,
`4,208,579, A
`4,212,073 'A
`4,290,095 A
`4,346,329 A
`
`Hough ................. 340/146.3
`12/1962
`Froschle
`.5/1972
`Scrivo et al. ............ 250/227
`6/1980
`Balasubramanian ........
`364/562
`7/1980
`Schmidt
`.................
`362/191
`9/1981
`Schmidt
`..................... 315/51
`8/1982 .
`(List continued on next page.)
`
`
`
`I ll lII l l lllII lllllllllll111111 1E Ill II lllII Ill lII
`
`US006488390B1
`US 6,488,390 B1
`*Dec. 3, 2002
`
`(10) Patent No.:
`(45) Date of Patent:
`
`FOREIGN PATENT DOCUMENTS.
`
`0356680
`3/1990
`0638801
`2/1995
`91/06846
`5/1991
`98/02716
`1/1998
`.......... G01B/11/03
`OTHER PUBLICATIONS
`"Copy of U.S. application Ser. No. 08/825,774 entitled High
`Speed Digital Video Serial Link", 33 pgs., (Apr. 2, 1997).
`(List continued on next page.)
`Primary Examiner-Stephen Husar
`Assistant Examiner--Bertrand Zeade
`(74) Attorney, Agent, or Firtn-Schwegman,
`Woessner & Kluth, P.A.
`ABSTRACT
`
`EP'
`EP
`WO
`WO
`
`(57)
`
`.......... GO1N/21/88
`
`Lundberg,
`
`.Improved method and apparatus for hand-held portable
`illumination. A flashlight and corresponding method are,
`described. The flashlight includes a housing, a plurality of
`LEDs, and an electrical circuit that selectively applies power
`from the DC voltage source to the LED units, wherein' the
`flashlight is suitable for handheld portable operation by a
`user. In one embodiment, the first electrical circuit further
`includes a control circuit for maintaining a predetermined
`light output level of the LED units as a charge on a battery
`varies. In another embodiment, the control circuit maintains
`an average predetermined light output level of the LED units
`as the charge on the battery cell varies by changing a pulse
`width or frequency as the charge on the battery cell varies to
`maintain a given average light output. Another aspect pro-
`vides an illumination source' that includes a light-emitting
`diode (LED) housing including one. or more LEDs, and a
`control circuit that selectively applies power from a source
`of electric power to the LEDs,.the control circuit substan-
`tially maintaining a light output characteristic of the LEDs
`as a voltage of the voltage source varies over a range that
`would otherwise vary the light output characteristic. Still
`another aspect provides an illumination source including a
`light-emitting diode (LED) housing including one or more
`LEDs; and a control circuit that selectively applies power
`from, a source of electric power to the LEDs, thus maintain-
`ing or controlling a light output color spectrum of the LEDs.
`
`40 Claims, 11 Drawing Sheets
`
`A-u,
`
`Exhibit LG-1002 Page 7
`
`

`

`US 6,488,390 B1
`Page 2
`
`356/374
`6/1997 Bieman et at. '............
`7/1997 Bieman ...................... 356/376
`356/371:
`10/1997 Huber et al ................
`4/1998 Lebens ................... ... 348/370
`10/1998 Huber ...................:.... 356/371
`10/1998 ' King et.al. ................. 356/237
`11/1998 Bladowski .......... 340/815.45
`.... 362/294
`4/1999 Abtahi et al ..........
`7/2000 Tonkin et al. ............ 248/212
`362/184
`8/2000 Lebens et al.........
`362/184
`10/2001 Lebens et al. ..............
`
`A A
`
`-
`
`AA A
`
`.
`
`AAAAAB
`
`1 *
`
`5,636,025
`5,646,733
`5,680,215
`5,745,176
`5,825,495
`5,828,449
`5,838,247
`5,890,794
`6,084,631
`6,095,661
`6,305,818
`
`OTHER PUBLICATIONS
`
`"Edmund Scientific Company 1993 Annual -Referencing
`Catalog, Cylinder Lenses (CYL)", catalog pg. 47.
`"Hewlett Packard Optotronics Designer's Catalog; Techni-
`cal Data entitled High power AllnGalP Amber and Red-.
`dish-Orange Lamps", pgs. 3-24 through 3-29, 1993.
`Ballard, D.H., "Generalizing the Hough Transform to Detect
`Arbitrary Shapes", Pattern Recognition, 13 (2), Pergamon
`Press, pp. 183-194, (1981).
`Davies, E.R., Machine Vision: Theory, Algorithns, Practi-
`calities, 2nd Edition, Academic Press, San Diego; pp.
`195-210, (1997). .
`Gennert, M.A., et al., "Uniform Fontal Illumination of
`Planar Surfaces: where to place the' lamps", Optical Engi-
`neering, vol. 32, No. 6, pp. 1261-1271, (Jun. 1993).
`Novini, A., "Fundamentals of machine Vision Lighting",
`Electro Conference Record, New York, NY, pp, 435-443,.
`(1993).
`Uber," G.T., "Illumination Methods. for Machine Vision",
`SPIE vol. 728 Optics, Illumination, and Imhage Sensing for
`Machine Vision, pp. 93-102; (1986).
`Yang; H.S.,: et al., "Determination of the Identity, Position
`and Orientation of the Topmost. Object in a Pile: Some
`Further Experiments", IEEE International Conference on
`Robotics and Automation, 1, San Francisco. CA, 293-298;
`(1986).
`
`* cited by examiner
`
`U.S. PATENT DOCUMENTS
`
`4/1985
`4,509,266 A
`6/1986
`4,592,147 A
`1/1987
`4,639,139 .A
`2/1987
`4,641,972, A
`5/1988
`4,743,773 A
`4/1989
`4,820,229 A
`5/1989
`4,831,504 A
`10/1989
`4,877,326 A
`11/1989
`4,882,498 A
`1/1990
`4,893,815 A
`4/1990'
`4,914,289 A
`4,962,347 A-
`10/1990 .
`10/1990
`4,964,023 A
`4,965,665 A ' 10/1990
`4,967,284 A
`10/1990
`4;972,093 A
`11/1990
`4,974,138 A
`11/1990
`4,978,857 A
`12/1990
`* 4/1991
`5,010,412 A
`5/1991
`5,015,918 A
`9/1991
`5,051,825 A
`.10/1991.
`5,058,982 A
`5,059,013 A
`10/1991
`10/1991
`5,060,065 A
`. 11/1991
`5,065,035 A
`5,072,127 A
`12/1991
`5,085,502 A
`2/1992
`5,172,005 A
`12/1992
`1/1993
`5,179,335 A
`5,179,474 A
`1/1993
`1/1994
`5,279,513 A
`5,299,227 A
`3/1994
`10/1994
`5,354,977 A
`5;355,221 A
`10/1994
`5,398,113 A
`3/1995
`6/1995
`5,424,927 A...
`5,457,492 A
`10/1995
`5,465,152 A
`11/1995
`5,468,950 A
`11/1995
`5,546,189 A
`8/1996
`10/1996
`5,561,525 A
`2/1997
`5,604,550 A
`
`.
`
`Cusack ................... 33/174 L
`Herman ..................... 33/366
`Wyant et al. .............. 356/359
`Halioua et al ........... 356/376
`Katana et al ........... 250/566
`Spraggins .................... 446/26
`Nishizawa et al. ......... 362/100
`Chadwick et al. ........ 356/394
`Cochran et al. .......... 250/571
`Rowan ...................... 273/84
`Nguyen et al ........ 250/223 B
`......... 320/48
`Burroughs et al.
`362/100
`Nishizawa et al .........
`Amir ..................... 358/101
`Yoshida et al: ........... 358/300
`Cochran et al. .......... 250/572
`Negishi :................... 362/347
`Juengel
`...................... 250/551'
`348/371
`Garriss .....................
`Copeland ................... 315/76
`Cochran et al. .......... 358/106
`Katzir ...................... 385/33
`Jain ..................... . 359/503
`Wasserman ................. 358/106
`......... :............ 250/551
`Juengel
`Cochran etal. .......... 250/572
`Womack et alt........... 356/376
`............ 250/57
`Cochran et al.
`Nor ........................... 320/21
`Bailey et alt ............ 359/798
`................... 446/219
`Connelly
`Rose*..................:........ 375/1.
`Roustaei .................. 235/472
`Cohen et al. ............. 356/359
`de Groot ................. 356/360
`Schaller et al. ......... 362/157-
`Sasaki et al. ............. 348/126
`Bilodeau et al. ........ 356/371
`.................... 235/472
`Hanson
`Svetkoff et a.
`........... 356/376
`356/360
`Toyonaga et al. ...........
`White ..................... 396/429
`
`Exhibit LG-1002 Page 8
`
`

`

`U.S Pateht
`Patent
`
`U.S,
`
`A‘ Dec. 3,2002
`Dec. 3, 2002.
`
`. Sheet 1 01>f11 ,
`Sheet 1 of 11
`
`US, 6,488,390 7B1 .'
`US 6,488,390 B1
`
`3
`
`
`
`49:2892_.
`
`5&8Ego; o5
`
`(
`
`Dd
`
`Exhibit LG-1‘ob2Page 9
`
`Exhibit LG-1002 Page 9
`
`

`

`US. Pant-en;
`U.S. Patent
`
`Dec. 3, 2002
`Dec, 3, 2002
`
`I Sheet 2‘0f'i'1.’ '
`Sheet 2 of 11
`
`'US' 638899031- '
`US 6,488,390 B1
`
`‘
`
`.2sz025mmSa/
`
`
`
`..7,5,.$25393..J
`
`
`
`
`
`05
`
`....
`
`
`
`
`
`0:}...7w_..,.4%..
`
`
`
`
`
`_,,0@/.J
`
`
`
`. .any..
`
`.8>
`
`mOmwwoOmmOmo—z.
`.
`
`Ais:
`A5559.05
`
`S I
`
`' I .
`
`I'
`
`L
`
`I
`
`L
`
`(
`
`d C
`
`-2
`
`Exhibit'LG-1002 P396310 '
`
`Exhibit LG-1002 Page 10
`
`
`
`
`

`

`j U.S.Pé1tént I
`U.S. Patent
`
`Dec. 3,, 2002
`Dec. 3, 2002
`
`Sheet 3 of 11
`Shéet3 of 11 '
`
`US 6,488,390 B1
`US 6,488,390’31 ,
`
`
`
` .E_U_—E.
`
`02.1
`
`..,.,v_o<moH¢.
`
`CL
`
`_
`1
`
`I
`
`1
`
`I
`
`L
`
`0c
`
`
`
`
`
`
`
`_922225....
`
`
`
`.mm,
`
`
`
`
`
`...538
`
`._2855;.
`
`-4--'|-:-:-y4.H
`
`49:28NEEA
`
`%\NN
`
`Exhibit LG-1002 Page 11
`
`Exhibit LG-1002 Page 11
`
`
`

`

`U.S. Patent ,
`U. S. Patent
`
`Dec. 3, 2002,
`Dec. 3, 2002,
`
`Sheet
`
`Sheet _4 0f‘11
`
`4 of
`
`11
`
`‘
`
`,...U.S 61488390 B1.
`..US 6,488,390 B1
`
`E
`
`.«95:8:0.mE9;use
`:m8.
`
`r
`
`,_3%?
`
`2328.
`
`
`
`.,.. \
`
`.A
`
`wng
`4ts.?
`
`..
`
`Exh-ib’it‘LG-1002 Page 12
`
`Exhibit LG-1002 Page 12
`
`
`
`

`

`U.S. Patent
`
`Dec. 3, 2002
`
`Sheet
`
`5 of
`
`11
`
`US 694889390 B1
`
`IDO
`n
`
`ht
`
`LO
`
`LC
`
`c-2D
`C2
`L
`
`Exhibit LG-1002 Page 13
`
`

`

`U.S. Patent
`
`Dec. 3, 2002
`
`Sheet .6 of 11
`
`US 6,488,390 B1
`
`3.5
`
`PHOTON ENERGY (eV)
`2.5
`
`3.0
`
`.1
`
`f'-
`
`Z)
`
`350
`
`400
`
`450
`
`600
`
`550
`
`600
`
`WAVELENGTH
`
`(nm)
`
`,.~
`
`Exhibit LG-1002 Page 14
`
`

`

`
` PULSECONTROL.
`
` 1%?”
`m
`
`
`
`- .
`
`(
`
`‘U'.,S'.‘Patent-
`U. S. Patent
`
`D'ec.’3,2002
`
`Dec. 3, 2002
`
`Sheet70f11‘
`
`7 of 11.
`
`Sheet
`
`US 6,488g397011'B117
`US 6,488,390 Bi
`
`L
`
`K_
`
`Exh’ibitLG-L1:002 Page 15‘ “ ,
`
`Exhibit LG-1002 Page 15
`
`

`

`'
`
`' ,-U.QS, Patent. ,
`U.S. Patent.
`
`.
`
`w
`
`Dec-35, 2002‘
`Dec. 3, 2002
`
`' Sheet ‘s-of 11
`Sheet 8 of 11
`
`$6,488,390 .131" g
`US 6,488,390 B1
`
`'
`
`0%/J\
`i
`
`y
`
`_,.;8>.
`
`0)
`
`---
`
`_
`
`__
`
`Co
`
`I,
`
`.I
`
`I
`
`*1
`
`-I
`
`.
`
`I,
`I ;
`
`I.
`SI.
`
`
`
`LL,
`
`- - - - ----------------
`
`C\2
`
`
`
`
`
`g..,...,2w...‘HE.
`
`:o
`
`LO
`
`be».
`
`LP
`
`.9
`
`--
`
`*
`
`I
`
`i..L.
`
`.22mg
`
`a
`
`.
`
`
`
`all.nnnnnnnnnnnnnnnnnnn
`
`--.------,
`
`BEEé2gm.
`
`.56%
`
`‘xvéam...
`
`‘mafia".
`
`BEBE.
`
`:r
`
`---
`
`---------------
`
`1
`
`I.
`
`I;I
`
`I
`
`-
`
`- I
`
`IJ
`
`'
`
`.
`
`I.I
`
`-1.
`
`II
`
`; Exhibit LG-1002 P219616 '
`
`‘
`
`Exhibit LG-1002 Page 16
`
`
`
`
`
`

`

`U. S.
`
`Patent
`
`Dec. 3, 2002
`
`Sheet 9: of 11
`
`US 6,488,390 B1
`
`3.35
`
`3.40
`
`3.45
`
`3.50
`
`3.55
`
`PHOTON ENERGY (eV)
`
`J,
`
`9
`
`U)
`
`Cl
`
`0 -
`
`)J
`
`--
`wz
`
`j
`
`Exhibit LG-1002 Page 17
`
`

`

`US. Patent
`U.S. Patent
`
`‘
`
`Dec. 3, 2002
`6.D
`
`.uf.0m,
`Sheet 10 of 11
`
`US 6,488,390 B1
`
`.EEEEE
`
`...._oEzoo
`
`558?.
`
`.2.H.422W232532..a:m__._z_
`_:23...
`
`h......S.........
`.
`
`2wmwm.M,L
`.Sm..Um
`,..6mmw0.P9.2.
`
`_NEE .Sm;
` _
`
`5N.
`
`mohémzuo
`
`
`
`Exhibit LG-1002 Page 18
`
`

`

`‘
`
`.
`
`‘ U._.S Patent
`U.S. Patent
`
`Dec. 3, 2002 .
`Dec. 3, 2002
`
`Sheet 11 of 11
`‘ Sheet 11 0111‘,
`
`Us 6,488,390 B1..
`US 6,488,390 B1
`
`
`
`
`
` sz...N-NmF-Nm_szJ..NFmF-E.Ha...mm....
`
`>.
`N"
`
`
`@111.H”—11.7.FnEl..,.................
`
`
`
`
`
`
`
`
`Minn......_r-----111.........ooFF.....oFo_.
`
`
`
`O.
`
`0.
`
`
`
`.mg?"—
`
`.
`
`.O.
`
`$0ng,
`
`Exhibit LG-1002 Page 1.9
`
`
`
`Exhibit LG-1002 Page 19
`
`

`

`US 6,488,390 B1
`
`_
`COLOR-ADJUSTED CAMERA LIGHT AND .
`METHOD
`
`°
`
`This application is a continuation of U.S. application Ser.
`No. 09/627,268, filed Jul. 28, 2000 (U.S. Pat. No. 6,305,
`818), which is a divisional of U.S. application Ser. No.
`09/044,559, filed Mar. 19, 1998 (U.S. Pat. No. 6,095,661),
`which applications are incorporated herein by.reference.
`
`FIELD OF THE INVENTION
`
`This invention relates to the field of lighting, and. more
`specifically to a method and apparatus of controlling and
`powering a' solid-state light source such as a light-emitting
`diode or LED, for a portable battery-powered'flashlight.
`
`BACKGROUND OF THE INVENTION
`
`There is a widespread need for hand-held flashlights and
`lanterns. One common flashlight includes a two-cell battery
`for power, an incandescent lamp to emit light, and a simple
`single-pole switch to connect and disconnect the battery to
`the lamp.. Other flashlights use other numbers of battery cells
`in order to provide. a voltage suitable for various, particular
`conditions. Lanterns ofteni use a fluorescent tube to emit
`light. Certain keychain fobs use a pair of hearing-aid cells
`and a red-light light-emitting diode (LED) in order to
`provide short-range lighting such as might be needed to find
`a keyhole in the dark.
`Battery, technology is such that as electrical power is
`withdrawn from a battery cell, the voltage available across
`a given current load will decrease. This decreased available
`voltage across the given load causes reduced light output,
`gradually dimming. the light as the battery charge depletes.
`Further, LEDs have voltage, current, and power param-_
`eters that must be controlledl in order to maximize device
`life. Commonly, a current-limiting resistor is placed in series
`with an LED in order that only a portion of the voltage drop
`from the battery is across the LED and the rest of the voltage
`drop is across the resistor. This voltage drop and correspond-
`ing power loss in the resistor is dissipated as Waste heat,
`which is inefficient for a flashlight which should be designed
`to" emit. light.'
`In addition; it is awkward or difficult 'to determine the
`amount 'of remaining' charge in a battery cell, generally
`requiring removal of:the battery from the flashlight in order
`to measure the remaining charge. In addition, the cost.of a
`separate measurement device can be a negative for this
`market.: Some battery cells today include a built-in liquid-
`crystal indicator for the charge in the cell, but such a solution
`requires' a separate measurement device/indicator for each
`battery, and requires removal of the battery from the flash-
`light in order to perform the measurement and observe the
`indication of remaining power.
`
`SUMMARY OF THE' INVENTION
`
`The -present invention provides amethod, and apparatus
`for an L.E.D. flashlight or other LED illumination source. In
`one embodiment, a flashlight is described. The flashlight
`includes a' flashlight housing suitable for receiving therein
`and/or mounting thereon at least one DC voltage source such
`as a battery. The -flashlight also includes a light-emitting
`diode (LED) housing connected to the flashlight' housing,
`-the LED housing including a first plurality of LED units-
`that each emit light and have a reflector for collimating the
`emitted light forwardly therefrom generally along an LED
`.optical axis, the first plurality of LED units.including at least
`
`'
`
`seven individual LED units. The flashlight also includes a
`first electrical circuit that selectively applies power from the
`DC voltage source to the LED units, wherein the flashlight
`is of such compact size and low weight as to be suitable for
`5 single-handed portable operation by a user, the flashlight
`further having a purpose of providing general-purpose illu-
`mination.
`In one embodiment, the LED optical axes of the first
`plurality of LED units in the flashlight are substantially
`10 parallel to one another:. In one such embodiment, the flash-
`light further includes a second plurality of LED units that
`each emit light and have a reflector for collimating the
`emitted light forwardly therefrom generally along an LED
`optical axis, wherein the LED optical axes. of the 'second
`plurality of LED units coiverge or diverge from one another
`forwardly from the housing.
`In another embodiment, an optical spread angle ofthe first
`plurality'of LED units in the flashlight are substantially
`equal to one another:Ind 6 ne such embodiment,.the flashlight
`20' further includes a second plurality of LED units that each
`emit light and have' a reflector for collimating the emitted
`light forwardly therefroin generally along an LED optical
`axis, wherein an.opfical spread angle of the second plurality
`of LED units are substantially equal to one another, and'
`25 different than the opticalspread angle of the first plurality of
`LED units.
`In yet another embodiment, the LED units are connected
`in a parallel-series configuration with at least two LED units
`coupled in parallel to one another and in series with at least
`30 one other LED unit, 'and the DC voltage source includes at
`least three battery cells connected in series.
`In still another embodiment, the first electrical circuit
`further includes' a control circuit for maintaining a prede-
`termined light output level of the LED units as a charge on
`35 the battery cell variesiliione such embodiment, the control
`circuit maintains an average predetermined light output level
`of the LED units as the: charge on the battery cell varies by
`increasing a pulse width or a pulse frequency as the charge
`on the battery cell decreases. In another such embodiment,
`40 the control circuit maintains an average predetermined light
`output level of the LED units by measuring a battery voltage
`and adjusting a pulse width or a pulse frequency or both to
`maintain the average light output at the predetermined level.
`In still'another such embodiment, the control circuit main-
`45 tains an average predetermined light output level of the LED
`units by measuring. an average light output and adjusting a
`pulse width or a pulse. frequency or both to maintain the
`measured average light outputat the predetermined -level.
`Another aspect of;the present invention provides a flash-
`so light including: (a) a flashlight housing, the housing being
`suitable for at least one of receiving therein and mounting
`thereon at least'one DC voltage source that includes at least
`one battery cell; (b).a light-emitting diode. (LED) housing
`connected to the flashlight housing, the LED housing includ-
`55ss ing one or more first LED units that each emit light and have
`a reflector for collimating the emitted light forwardly there-
`from generally along an LED optical axis,. and (c) a first
`electrical circuit.that selectively applies power from the DC
`voltage source to 'the LED units, the first electrical circuit'
`60 further including a control circuit for maintaining a prede-
`termined light output level of the LED units as a charge on
`the battery cell varies;' wherein the flashlight is of such
`compact size and 'low: weight as.to be suitable for single-
`'handed portable operation by a user, the flashlight further
`65' having a purpose. of providing general-purpose illumination.
`In one such embodiment, the first LED units being a first
`plurality of LED units, wherein the LED optical axes of the
`
`Exhibit LG-1002 Page 20
`
`

`

`US 6,488,390 B1
`
`first'plurality of LED units are substantially parallel to one
`another. In :another such embodiment, the flashlight-further
`includes a second plurality of LED units that each emit light
`and have a reflector for collimating, the emitted light for-
`wardly therefrom generally along an LED optical. axis,
`wherein the LED optical axes of the second plurality of LED
`units converge or diverge from one another forwardly from
`the housing.
`In another such embodiment, the first LED units are a first
`plurality of LED units, wherein an optical'spread angle of'
`the first plurality of LED units are substantially equal to one
`another. In yet another such embodiment,. the flashlight
`further includes a second plurality of LED units that each'
`emit light and have a reflector"for collimating the emitted
`light forwardly therefrom generally along an LED optical.
`axis, wherein an optical spread angle of the second plurality
`of LED units are substantially equal .to one another, and
`different than the optical spread angle of the. first plurality of
`LED units..
`Another aspect of the present invention provides a method
`of providing general-purpose illumination of such compact'
`size and low weight as to.- be suitable for single-handed.
`portable operation by a user, including the steps of: (a)
`providing one or more first LED units that each. emit light
`and have a reflector for collimating the emitted light for-
`wardly therefrom generally along an LED optical axis; (b)
`selectively applying power from a DC voltage source to the
`LED units; and (c) maintaining a predetermined light output
`level of the LED units as a charge on the battery cell varies
`by controlling the step (b).
`In one embodiment, the step of maintaining maintains an
`average predetermined light output level of the LED units as
`the charge on the battery cell varies by increasinga pulse
`energy or a pulse frequerincy as the charge on the battery cell!
`decreases. In another embodiment, the step of maintaining
`maintains an average: predetermined light output level of the
`LED units by measuring a battery voltage and adjusting a.
`pulse width. or a pulse frequency or both to maintain the
`average light output. at the- predetermined
`level., In still
`another embodiment, the 'step of maintaining maintains an
`average predetermined light output level of the LED units by
`measuring a light output and adjusting a pulse energy or a
`pulse frequency or both to maintain an average light output
`at the predetermined level.
`Yet another aspect of the present invention provides an
`illumination source, that includes (a) a light-emitting diode
`(LED) housing including one or more LEDs; and (b) a
`control circuit that selectively applies power from a source
`of electric power to.-the LEDs, the control:circuit substan-
`tially maintaining a light output characteristic of the.LEDs
`as a voltage of the voltage source varies over a range that
`would otherwise vary the light output characteristic. In one
`such embodiment,
`the light output characteristic
`that is
`maintained is light'output. intensity. In another such
`embodiment, the control circuit maintains the light output
`intensity of the LED units as the voltage of the DC voltage
`source varies by'increasing a pilse Width, a pulse energy, or
`a pulse frequency as the voltage of the DC voltage source
`decreases.. In another such embodiment, the control circuit
`maintains an average predetermined light output level of the
`LED units by measuring a voltage and adjusting a pulse
`energy or a pulse frequency or both to maintain the average
`light output at the predetermined level. In yet another such
`embodiment, the control circuit maintains an average pre-
`determined light output level of the LED units by measuring
`an average light output and adjusting a pulse width or a pulse
`frequency or both to maintain the measured average light
`output at the predetermined level.
`
`Another aspect of the present invention provides a
`battery-powered portable flashlight (100) including: a casing
`(110) suitable to hold a. battery; one or more light-emitting
`devices (LEDs) (150) mounted to the casing; a.switch (140)
`s mounted to the casing; and a control circuit (130) coupled to
`the battery, the LEDsiand the switch, wherein the control
`circuit drives the LEDs with electrical pulses at a frequency
`high enough that light produced by the LEDs has an appear-
`ance to a human user of being continuous rather than pulsed,
`10 and wherein the LEDs have proportion of, on-time. that
`increases as remaining battery power decreases. One such
`embodiment further includes a feedback circuit that controls-
`the pulses so that light intensity produced by the LEDs, as
`perceived by the human user, is substantially-constant across
`15 a greater range of battery power or voltage than a corre-
`sponding range forwhich light intensity is equally constant ..
`without the: feedback circuit. In one such embodiment, the
`feedback circuit measures a light output of the LEDs.
`Another such embodiment further includes a battery-
`20 voltage-measuring circuit coupled to the control circuit.
`Yet another aspect of the present invention provides, a
`method for driving battery-powered portable flashlight (100)
`having a casing (110), a-DC power source mounted to the
`casing, one or more solid-state light-emitting device (LEDs)
`25 (150) mounted to the casing, the method including the steps
`of: receiving input from 'a user; and based on the received
`input, generating a series of pulses to drive the LEDs such
`that the LEDs have proportion of on-time that increases as
`remaining battery power decreases.
`-
`Still another aspect of the present'.invention provides an
`illumination source 'including
`(a) a light-emitting diode
`(LED) housing includiig one or more. LEDs; and (b) a
`control circuit that:-selectively applies power from a soiurce
`of electric power to:the one or more LEDs, the control circuit -
`maintaining a predetermined light output color spectrum of
`the one or more LEDs as a voltage of the source of electric
`power varies. In one 'such embodiment, the one or more
`LEDs comprise one or more LEDs having a first character-
`40 istic color spectrum output and one or more LEDs having a
`second characteristic color spectrum output, the first char-
`acteristic color spectrum 'output different from the second.
`characteristic color spectrum output, and the control circuit
`controls a pulse characteristic
`in order to control the pro-
`portion of light output having the first characteristic color
`spectrum output to that having the 'second. characteristic
`color spectrum output. In another such embodiment, the one
`or more LEDs comprise one or more LEDs having a
`characteristic color spectrum output that varies based on'
`applied current,: and the control circuit controls a pulse
`50 current in order to control the characteristic color spectrum
`output.
`Yet another aspect of the present invention provides an
`illumination source that includes (a) a light-emitting diode
`55 (LED). housing including one or more LEDs; and (b) a
`control circuit that selectively applies power from ,a source
`of electric power to'the LEDs to adjust a light output color
`spectrum of the one or more LEDs.
`
`30
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`60
`
`FIG. 1 shows one 'embodiment of the present invention; a
`schematic representation of