Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 1 of 29 PageID# 10569
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 1 of 29 Page|D# 10569
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`EXHIBIT F
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`EXHIBIT F
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`

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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 2 of 29 PageID# 10570
`Case 3:14-cv-00757-REP-DJN Document 811““ llllllflll “mm lllWllllfillll lllllllllllllllllllllom
`
`USOO6804724B2
`
`(12) United States Patent
`Shin
`
`(10) Patent N0.:
`
`(45) Date of Patent:
`
`US 6,804,724 B2
`*Oct. 12, 2004
`
`(.54) ANALOG/DIGITAL DISPLAY ADAPTER AND
`A COMPUTER SYSTEM HAVING THE SAME
`
`lshii ct al.
`2.52000
`6,028,585 A *
`7.52001 McGowan
`6,262,695 B1 "
`FOREIGN PATENT DOCUMENTS
`
`345/132
`345,51
`
`(75)
`
`Inventor: Seung-Gi Shin, Suwon (KR)
`
`(73) Assignee: Samsung Electronics Co., Ltd.,
`Suwon-si (KR)
`
`EP
`EP
`
`0 419 910 A2
`0 802 .519 A1
`
`411991
`1051907
`
`OTHER PUBLICATIONS
`
`( *) Notice:
`
`This patent issued on a continued pros-
`ecution application filed under 37 CFR
`1.53(d), and is subject to the twenty year
`patent
`term provisions of 35 U.S.C.
`154(a)(2).
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 3.5
`U.S.C. 154(b) by 0 days.
`
`(21) Appl. N0.: 09/301,609
`
`(22)
`
`Filed:
`
`Apr. 29, 1999
`
`Prior Publication Data
`
`US 20(le0149541 Al Oct. 17, 2002
`
`(65)
`
`(30)
`
`Foreign Application Priority Data
`
`
`Apr. 29. 1998
`Oct. 16. 1998
`
`98-15395
`(KR)
`(KR) ............................................ 98-43766
`
`Int. Cl.7 ................................................ G06F13/00
`(51)
`(52) U.S. Cl.
`................................ 710/2; 34513; 34511147
`(58) Field of Search.
`.
`. 3451147, 3, 22,
`345: 186, 89,1, 553,132, 127, 30, 211—213;
`71012
`
`(56)
`
`References Cited
`U.S. PATENT DOCUMENTS
`
`5.150.109 A
`5,491,496 A "
`5.559.525 A *
`5,608,418 A
`5.710.570 A *
`5,757,338 A
`
`9/1992 Berry ......................... 345,600
`2,-"1996 Tomiyasu
`345/147
`9/1996 Zenda ................. 345:1
`
`3.51997 McNally ..........
`568/853
`1/1998 Wada et al.
`....... 3453
`51998 Bassctti ct al.
`34553.2
`
`
`
`The User Manual for the Gateway Solo 5300 notebook
`computer, pp. 5 and 20.
`Printout
`of www.ati.com./’productst'mobilityradeon/dis-
`play.html from AT] technologoes, Inc.
`
`(List continued on next page.)
`
`Primary Examiner—Jeffrey Gatiin
`Assistant hlralttiner—Harold Kim
`
`(74) Attorney, Agent, or Firm—Robert E. Bushnell, Esq.
`
`(57)
`
`ABSTRACT
`
`A desktop computer system has a display adapter capable of
`supporting a digital display such as LCD panels as well as
`an analog display. The computer system provides analogx‘
`digital video signals outputted from the display adapter with
`a CRT monitor or a LCD monitor depending upon the
`monitor cable connection state. The computer system further
`has a power saving function to be performed in the display
`adapter also depending upon the monitor cable connection
`state. The display adapter includes two video ports, that is,
`a first video port being coupled with the CRT monitor cable,
`and a second video port being coupled with the digital
`monitor cable. Further included is a digital transmitter for
`sending parallel digital video signals to the LCD monitor
`through the second video port. A monitor cable sensing
`circuit is provided to detect connection state of the digital
`monitor cable. To this end, the digital monitor generates a
`signal being sent to the second video port over the monitor
`cable, thereby informing the video controller of the monitor
`cable connection state. If the LCD monitor cable is not
`
`connected with the video port, the sensing circuit prevents
`the display enable (DE) signal supplied by the video con-
`troller from being inputted to the transmitter.
`
`14 Claims, 19 Drawing Sheets
`
`
`
`-—-——-—-__-——--_--__-—_-————-——.I
`
`

`

`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 3 of 29 PageID# 10571
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 3 of 29 Page|D# 10571
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`US 6,804,724 132
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`Page 2
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`
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`OTHER PUBLICATIONS
`
`
`
`
`Developer’s note to the Power Macintosh G3 All—in—one
`
`
`
`
`
`
`
`computer, pp. 18 and 26.
`
`
`
`
`
`WWW.Whatis.com or WWW.Whatis.techtarget.com definition
`
`
`
`for “monitor” and “display”.
`
`
`
`
`XP—002123075, VESA (Video Electronics Standards Asso-
`
`
`
`
`
`
`ciation), Plug and Display (P & DTM) Standard, Version I ,
`
`
`
`
`
`
`
`
`dated Jun. 11, 1997.
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`* cited by examiner
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`Printout of WWW.ati.com/support/infobase/3588.html from
`
`
`
`
`ATI Technologies, Inc.
`
`
`
`Printout
`of
`
`
`11—5053877.html.
`
`
`Printout of wwwrealtimesoft.com/multimon/guide/laptop-
`
`
`s.asp.
`
`Printout of WWW.rdpslides.com/pptfaq/FAQ00476.htm.
`
`
`
`techrepublic.com .com/5100—6270i
`
`
`
`
`
`

`

`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 4 of 29 PageID# 10572
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 4 of 29 Page|D# 10572
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`US. Patent
`
`Oct. 12, 2004
`
`Sheet 1 of 19
`
`US 6,804,724 B2
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`

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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 5 of 29 PageID# 10573
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 5 of 29 Page|D# 10573
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`US. Patent
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`Oct. 12, 2004
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`Sheet 2 0f 19
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`US 6,804,724 B2
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`Fig. 2
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`(Prior art)
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`Fig. 3
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`(Prior art)
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 6 of 29 PageID# 10574
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 6 of 29 Page|D# 10574
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`US. Patent
`
`Oct. 12, 2004
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`Sheet 3 0f 19
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`US 6,804,724 B2
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`Fig. 4
`
`(Prior art)
`
`II I
`
`Il
`
`.
`
`24
`
`l
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`Video Card
`l
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`
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`Monitor
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`Video _ _ CRT
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`Controller
`
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`System Bus
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`______________________________ I
`
`IIII|IIIIIIIIIIIIlIIIIIIIIlIIIII
`
`

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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 7 of 29 PageID# 10575
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 7 of 29 Page|D# 10575
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`US. Patent
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`Oct. 12, 2004
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`Sheet 4 0f 19
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`US 6,804,724 B2
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`100
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`
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`
`
`
`Fig.5 (Priorart)
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`

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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 8 of 29 PageID# 10576
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 8 of 29 Page|D# 10576
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`
`US. Patent
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`Oct. 12, 2004
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`Sheet 5 0f 19
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`US 6,804,724 B2
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`Fig. 6
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`(Prior art)
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`410
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`

`

`E:
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 9 of 29 PageID# 10577
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 9 of 29 Page|D# 10577
`
`Video
`
`490
`__________________________________________ r______|
`430
`421
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`I
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 10 of 29 PageID# 10578
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 10 of 29 Page|D# 10578
`
`
`US. Patent
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`
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`Oct. 12, 2004
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`Sheet 7 0f 19
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`US 6,804,724 B2
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 11 of 29 PageID# 10579
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 11 of 29 Page|D# 10579
`
`
`US. Patent
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`
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`Oct. 12, 2004
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`Sheet 8 0f 19
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`US 6,804,724 B2
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 12 of 29 PageID# 10580
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 12 of 29 Page|D# 10580
`
`59°
`r ..................................... L-..
`I
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`
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 13 of 29 PageID# 10581
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 13 of 29 Page|D# 10581
`
`DVOC
`
`AVCC
`
`620
`
`DVCC AVCC
`
`Fig. 12
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`
`Controller
`(524)
`
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`TX2+ Connecto
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 14 of 29 PageID# 10582
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 14 of 29 Page|D# 10582
`
`11mm'90
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`#7002‘ZI'130
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 15 of 29 PageID# 10583
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 15 of 29 Page|D# 10583
`
`To Video Controller (524)
`DE ....................
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 16 of 29 PageID# 10584
`Case 3:14-cv-00757-REP-DJN Document 81
`-6 Filed 04/10/15 Page 16 0f 29 Page|D# 10584
`
`US. Patent
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`Oct. 12, 2004
`
`Sheet 13 0f19
`
`US 6,804,724 B2
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 17 of 29 PageID# 10585
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 17 of 29 Page|D# 10585
`
`To Video Controller (524)
`
`Fig. 16
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`05m AGND
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`

`

`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 18 of 29 PageID# 10586
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 18 of 29 Page|D# 10586
`
`US. Patent
`
`Oct. 12, 2004
`
`Sheet 15 0f 19
`
`US 6,804,724 B2
`
`Fig.
`
`1 7A
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`AVCC
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`
`Fig.
`
`1 73
`
`DVCC
`AVOC
`528b
`
`'
`
`26th Pin 0f
`MDR Connector
`(522)
`
`26th Pin Of
`MDR Connector
`(522)
`
`
`
`DVCC
`
`AVCC
`
`
`
`526
`
`
`
`Transmitter
`
`

`

`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 19 of 29 PageID# 10587
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 19 of 29 Page|D# 10587
`
`US. Patent
`
`Oct. 12, 2004
`
`Sheet 16 0f 19
`
`US 6,804,724 B2
`
`Fig.
`
`1 7C
`
`DVCC
`
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`
`DVCC
`
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`
`26th Pin 0f
`MDR ((Eoggector
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`I
`I
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`
`526
`
`Fig. 17D
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`DVCC
`AVCC
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`
`
`DVCC
`
`
`
`Transmitter 526
`
`
`
`
`26th Pin 0f
`MDR Connector
`(522)
`
`

`

`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 20 of 29 PageID# 10588
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 20 of 29 Page|D# 10588
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`
`US. Patent
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`
`
`Oct. 12, 2004
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`
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`
`
`Sheet 17 0f 19
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`
`
`
`
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`US 6,804,724 B2
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`
`
`
`
`
`Fig.18
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`
`
`
`
`

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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 21 of 29 PageID# 10589
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 21 of 29 Page|D# 10589
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`
`US. Patent
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`
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`Oct. 12, 2004
`
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`Sheet 18 0f 19
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`US 6,804,724 B2
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`710
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 22 of 29 PageID# 10590
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 22 of 29 Page|D# 10590
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`Fig. 20
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`700
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`r _____________________________________________________________ 1C?...... 1
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`TransmitterL725-_uufenet------J100
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`Main
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`IllII l :
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 23 of 29 PageID# 10591
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 23 of 29 Page|D# 10591
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`
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`US 6,804,724 B2
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`1
`ANALOG/DIGITAL DISPLAY ADAPTER AND
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`A COMPUTER SYSTEM HAVING THE SAME
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`CLAIM OF PRIORITY
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`incorporates the
`This application makes reference to,
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`same herein, and claims all benefits accruing under 35
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`U.S.C. § 119 from an application for Analog/Digital Display
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`Adapter and a Computer System Having the Same earlier
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`filed in the Korean Industrial Property Office on Apr. 29
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`1998 and there duly assigned Serial No. 15395/1998 and on
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`Oct. 16 1998 and there duly assigned Serial No. 43766/1998.
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`1. Field of the Invention
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`The present invention relates to computer systems, and
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`more particularly to a computer system having dual and
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`triple display function that supports analog displays and
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`digital displays.
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`2. Discussion of the Related Art
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`Conventionally, personal computers are equipped with
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`cathode ray tube (CRT) monitors. Also, portable computers
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`such as laptop and notebook computers chiefly use flat panel
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`liquid crystal displays. Occasionally, a desktop computer is
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`equipped with the liquid crystal display (LCD) monitor,
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`although it
`is costly. Today,
`liquid crystal displays are
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`considered as a substitute for the CRT display for their
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`compactness and low power consumption.
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`In the meantime, display monitors adopting the LCD
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`panel have been developed to be used with the desktop
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`personal computer. The LCD monitor has advantages of low
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`power consumption and low electromagnetic wave radia-
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`tion. LCD monitors commonly include an interface circuitry
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`that converts analog video signals inputted from the system
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`host into digital video signals in order to drive every pixel
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`of the LCD panel. In particular, advanced digital display
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`systems use all-digital flat panel display interface that elimi-
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`nates the analog-to-digital conversion of the video signals
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`and transmits digital video data from a host video controller
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`to the LCD monitor through high speed data channel. This
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`solves the digital interface design problems such as increas-
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`ing clock rates, data lines, and cable length. In this system,
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`the video controller circuitry converts the video memory
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`data into transferable form and reconstructs it once it gets to
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`the display panel.
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`Yet there has not been provided in the desktop computer
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`a display adapter or video card that supports that all-digital
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`interface LCD monitor. Further, in the notebook computer,
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`there has not been provided an external digital video output
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`function that allows use of the all-digital interface LCD
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`monitor.
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`Furthermore, there are cases where either the external
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`monitor cable fails to connect with the external video port of
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`the notebook computer or the external monitor is not sup-
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`plied with the power. In either case, when the notebook
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`computer system is set to output video signals through the
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`external video port, the external monitor will not operate and
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`thus nothing appeared on the monitor screen.
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`Japanese Patent 2-64693 discloses a computer in which a
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`CRT and an LCD are both available from separate output
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`ports on a computer. US. Pat. No. 5,608,418 for a Flat Panel
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`Display Interface For a High Resolution Computer Graphics
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`System to McNally discloses a graphics subsystem that
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`contains a flat panel connector and a CRT connector. In
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`addition, McNally shows that a color buffer circuit receives
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`a flat panel sense data which indicates whether the flat panel
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`display is coupled to the flat panel interface lines.
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`2
`What is needed is a portable, notebook computer having
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`an LCD display panel, that can accommodate hookups to
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`another LCD digital flat panel display and a hookup to a
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`CRT monitor. In this arrangement, the extra LCD display
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`will contain circuitry that will let the notebook computer
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`know whether the extra LCD display monitor is hooked up
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`so that power will be delivered to the LCD hookup only
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`when an LCD monitor is plugged into the LCD hookup.
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`SUMMARY OF THE INVENTION
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`The present invention is intended to solve the prior art
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`problems, and it is therefore an object of the invention to
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`provide a display adapter capable of supporting digital
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`displays as well as analog displays.
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`It is another object of the invention to provide a computer
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`display system having dual display adapters capable of
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`connecting one of the displays depending upon the monitor
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`cable connection state.
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`It is further object of the invention to provide a computer
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`display system having dual display adapters capable of
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`reducing power consumed in one display adapter depending
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`upon the monitor cable connection state.
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`It is further yet another object to provide a triple display
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`notebook computer where the notebook computer will sup-
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`port hookups with another LCD display and a CRT display.
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`It is still another object to provide a monitor for the LCD
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`hookup lines so that power will only be delivered to the LCD
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`hookup only if the extra LCD monitor is plugged into the
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`LCD hookup.
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`In accordance with one aspect of the present invention, a
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`desktop computer system is provided, which comprises: a
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`main board having at least one expansion slot; and a display
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`adapter installed in one of the expansion slot of the main
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`in which the display adapter including: a video
`board,
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`controller for providing analog video signals and digital
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`video data with the CRT display and digital displays, respec-
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`tively; a first video port for connecting with the CRT monitor
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`cable; and a second video port for connecting with the digital
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`display monitor.
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`In accordance with another aspect of the present
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`invention, a display adapter for use in a computer system is
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`provided, which comprises: a video controller for outputting
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`serial analog video signals and parallel digital video signals;
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`a first connector being coupled with the CRT monitor cable
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`connector; a second connector being coupled with the digital
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`monitor cable connector; and a digital transmitter for send-
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`ing parallel digital video signals to a digital display through
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`the second connector.
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`The display adapter further comprises a monitor cable
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`sensing means for detecting connection of the digital moni-
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`tor cable connector with the second connector, whereby a
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`display enable signal is generated in the video controller and
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`being sent to the digital transmitter when the connection
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`between the digital monitor cable and the second connector
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`has been completed.
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`Preferably, the digital monitor includes means for gener-
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`ating a signal to be sent to the second connector of the
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`display adapter over the monitor cable, thereby informing
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`the monitor cable connection with the second connector to
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`the video controller.
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`Further, the display adapter further comprises a power
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`supply control circuit for switching on/off of the supply
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`voltages directed to the digital transmitter, in which the
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`power supply control circuit responds to the signal fed from
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`the digital monitor such that the supply voltages are supplied
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`10
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`60
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`65
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 24 of 29 PageID# 10592
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 24 of 29 Page|D# 10592
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`US 6,804,724 B2
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`3
`with the transmitter when the connection between the digital
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`monitor cable and the second connector has been completed.
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`In accordance with the other aspect of the present
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`invention, a portable computer system is provided, which
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`comprises: a LCD panel hingedly attached to the main body
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`of the portable computer; a main board having a display
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`adapter; a video controller capable of providing digital video
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`data with the LCD panel; a transmitter for sending parallel
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`digital video data to an extra digital monitor; and an external
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`video port for connecting a cable of the external digital
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`monitor.
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`The display adapter according to this invention allows the
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`video signal to be sent to one of the LCD monitor and CRT
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`monitor, any one that is connected with the video card,
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`regardless of the video start-up direction or video output
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`path set in the computer system. Further, the display adapter
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`of the invention is capable of reducing power consumed in
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`the digital transmitter when the monitor cable is discon-
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`nected from the computer system.
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`BRIEF DESCRIPTION OF THE DRAWINGS
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`Amore complete appreciation of the invention, and many
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`of the attendant advantages thereof, will be readily apparent
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`as the same becomes better understood by reference to the
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`following detailed description when considered in conjunc-
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`tion with the accompanying drawings in which like refer-
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`ence symbols indicate the same or similar components,
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`wherein:
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`FIG. 1 is an exterior view of an earlier desk top personal
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`computer with a CRT monitor;
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`FIG. 2 is a rear view of the desk top computer of FIG. 1,
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`for showing connection of the CRT monitor cable with a
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`video port thereof;
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`FIG. 3 is a view similar to FIG. 2, showing a video card
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`installed in an expansion slot of the computer;
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`FIG. 4 is a block diagram of an earlier computer system
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`having a VGA card;
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`FIG. 5 is an exterior view of an earlier notebook
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`computer, for showing connection of an extra CRT monitor
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`therewith;
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`FIG. 6 is a rear view of the notebook computer of FIG. 5,
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`for showing connection of the CRT monitor cable with an
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`external video port thereof;
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`FIG. 7 is a block diagram of an earlier notebook computer
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`system having a VGA card with a LCD panel interface and
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`the external CRT port;
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`FIG. 8 is an exterior view of a desktop computer having
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`an analog/digital video adapter, showing connection of CRT
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`monitor and LCD monitor therewith;
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`FIG. 9 is a rear view of the desktop computer of FIG. 8,
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`for showing connection of the CRT monitor cable and LCD
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`monitor cable with two video ports thereof;
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`FIG. 10 is a view similar to FIG. 9, showing a VGA card
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`having two video ports installed in an expansion slot of the
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`computer;
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`FIG. 11 is a block diagram of a desktop computer system
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`having a VGA card in accordance with one embodiment of
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`the invention;
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`FIG. 12 is a schematic diagram of the digital signal
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`interface between the transmitter of the VGA card and the
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`receiver of the LCD monitor;
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`FIG. 13 is a block diagram of the VGA card having a LCD
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`monitor cable sensing circuit in accordance with the inven-
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`tion;
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`4
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`FIG. 14 is a detailed diagram for showing the LCD
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`monitor cable sensing circuit;
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`FIG. 15 is a block diagram of the VGA card having a
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`power supply control circuit for the transmitter in accor-
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`dance with the invention;
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`FIG. 16 is a schematic diagram of the power supply
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`control circuit shown in FIG. 15;
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`FIGS. 17A—17D are schematic circuit diagrams for show-
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`FIG. 18 is an exterior view of a notebook computer
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`having analog/digital video adapter, showing connection of
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`external CRT monitor and LCD monitor therewith;
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`FIG. 19 is a rear view of the notebook computer of FIG.
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`18, for showing connection of the CRT monitor cable and
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`LCD monitor cable with two video ports thereof; and
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`FIG. 20 is a block diagram of the notebook computer
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`system having a VGA card with an external CRT port and
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`LCD port in accordance with another embodiment of the
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`invention.
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`DETAILED DESCRIPTION OF THE
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`INVENTION
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`An earlier desk top personal computer is shown in FIG. 1,
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`in which a CRT monitor 100 and keyboard 200 are coupled
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`to a tower type personal computer 300 as indispensable
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`input/output devices. The CRT monitor 100 and keyboard
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`200 are connected to the computer 300 via signal cables 110
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`and 210 as shown in FIG. 2. These signal cables 110 and 210
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`are provided with at one end connectors 111 and 211 so they
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`can be coupled with the counterpart connectors or ports 321
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`and 312 provided in the computer. As shown in FIG. 3, the
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`video port 321 is mounted in a video adapter card 320
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`installed in one of expansion slots 311 of the system mother
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`board 310. The keyboard port 312 is also mounted in the
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`mother board 310.
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`A configuration of the earlier computer system having
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`such a connection can be seen in FIG. 4. The computer
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`system comprises a central processing unit (CPU) 330, a
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`BIOS 340, a main memory 350, an I/O controller 360, and
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`a video card 320. The video card 320 includes a video BIOS
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`322, a video controller 323, a video memory 324, and a
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`connector 321. The video controller 323 generates analog R,
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`G, B video signals corresponding to the stored image in the
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`video memory 324 and transmits the serialized video signals
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`along with horizontal and vertical synchronizing signals to
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`the CRT monitor 100 through the connector 321. The
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`connector 321 commonly uses 15-pin D-Sub female VGA
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`connectors. Thus, most desktop computers have been
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`designed to use with the CRT monitor.
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`In the case of a portable computer, usually a LCD panel
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`is used as a main display and selectively an extra CRT
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`monitor can be used therewith as shown in FIG. 5. The LCD
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`panel 410 is hingedly attached to the main body 405 of
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`notebook computer 400, facing a computer user in the open
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`position and forming a lid covering the top portion of the
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`main body 405 in the close position. The CRT monitor 100
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`can be selectively connected with the notebook computer, if
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`an external video port is provided in the notebook computer.
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`FIG. 6 shows the rear side of the notebook computer 400,
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`where an external video port 425, preferably 15-pin D-Sub
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`female connector is provided in line with serial/parallel
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`ports. The CRT monitor cable 110 has analog 15-pin D-Sub
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`male connector 111 to be coupled with the external video
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`port 425 when required.
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`FIG. 7 shows a configuration of an earlier notebook
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`computer system as described above. The notebook com-
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`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 25 of 29 PageID# 10593
`Case 3:14-cv-00757-REP-DJN Document 81-6 Filed 04/10/15 Page 25 of 29 Page|D# 10593
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`US 6,804,724 B2
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`5
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`6
`use of a data recovery algorithm to select the most reliable
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`data sampling points.
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`As shown in FIG. 12, the transmitter 526 receives parallel
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`digital video data from the host video controller 524. Inputs
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`of the transmitter 526 are 6-bit video data (R, G, B),
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`horizontal and vertical synchronizing signals (HSYNC,
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`VSYNC), 3-bit control signal (CTL), display enable signal
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`(DE), clock signal (DCLK). The transmitter 526 encodes
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`and serializes the parallel input data by the use of an internal
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`PLL circuit. The serialized data is then transmitted to the
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`receiver chip 630 of the LCD monitor 600 over four low
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`voltage differential channels TXO, TX1, TX2 and TXC, the
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`amplitude of which is set by the swing control circuit
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`provided in the transmitter 526. Each channel consists of a
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`pair of lines that is shown in the drawings by addition of +
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`and — thereto. R (red) video data signal is sent over a pair of
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`lines TXO+ and TXO—. G (green) video data signal is sent
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`over a pair of lines TX1+ and TX1—. B (blue) video data
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`signal is sent over a pair of lines TX2+ and TX2—. And the
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`differential clock signal is sent over a pair of lines TXC+ and
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`TXC—, constituting the differential clock channel.
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`Further, the transmitter 526 is applied by two voltages
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`DVCC and AVCC. The DVCC is