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`US 20050017765Al
`
`(19) United States
`(12) Patent Application Publication
`Sasaki et al.
`
`(10) Pub. No.: US 2005/0017765 Al
`Jan. 27, 2005
`(43) Pub. Date:
`
`(54) CURRENT GENERATION SUPPLY CIRCUIT
`AND DISPLAY DEVICE
`
`(75)
`
`Inventors: Kazuhiro Sasaki, Sagamihara-shi (JP);
`Katsuhiko Morosawa, Tachikawa-shi
`(JP)
`
`Correspondence Address:
`FRISHAUF, HOLTZ, GOODMAN & CHICK,
`PC
`767 THIRD AVENUE
`25TH FLOOR
`NEW YORK, NY 10017-2023 (US)
`
`(73) Assignee: Casio Computer Co., Ltd., Tokyo (JP)
`
`(21) Appl. No.:
`
`10/891,904
`
`(22) Filed:
`
`Jul. 14, 2004
`
`(30)
`
`Foreign Application Priority Data
`
`Jul. 16, 2003
`
`(JP) ...................................... 2003-275077
`
`Publication Classification
`
`Int. CI.7 ....................................................... H03B 1/00
`(51)
`(52) U.S. Cl. .............................................................. 327/108
`
`ABSTRACT
`(57)
`A current generation supply circuit which supplies drive
`currents corresponding to digital signals for a plurality of
`loads comprising a signal holding circuit which takes in and
`holds the digital signals, a current generation circuit which
`generates the drive currents having a ratio of current values
`corresponding to the values of the digital signals held in the
`signal holding circuit relative to the reference current sup(cid:173)
`plied from a constant current source and supplied to the
`loads, and an operational state setting circuit which overlaps
`in terms of time and sets the operating state in the signal
`holding circuit and the current generation circuit in order to
`execute at least a take-in and hold operation of the digital
`signals in the signal holding circuit and a generation supply
`operation of the drive currents in the current generation
`circuit; as well as raises the operating speed of the current
`generation supply circuit.
`
`20A
`~
`CLK
`2~A
`: ___ __l_ _____________ ·-----·---r--·---
`
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`OUTi
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`19
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`
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`
`Isa TP12
`
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`
`TP11
`
`+V
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`'
`
`l' ref
`
`SAMSUNG, EXH. 1006, P. 1
`
`

`

`Patent Application Publication Jan. 27, 2005 Sheet 1 of 27
`
`US 2005/0017765 Al
`
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`SAMSUNG, EXH. 1006, P. 2
`
`

`

`Patent Application Publication Jan. 27, 2005 Sheet 2 of 27
`
`US 2005/0017765 Al
`
`FIG. 2A
`
`10
`
`dO
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`
`· d1
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`
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`FIG. 2B
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`10
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`d10
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`d11
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`d12
`
`d13
`
`·-----·
`
`CLK
`
`CLK
`
`SAMSUNG, EXH. 1006, P. 3
`
`

`

`Patent Application Publication Jan. 27, 2005 Sheet 3 of 27
`
`US 2005/0017765 Al
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`en
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`SAMSUNG, EXH. 1006, P. 4
`
`

`

`Patent Application Publication Jan. 27, 2005 Sheet 4 of 27
`
`US 2005/0017765 Al
`
`FIG. 4
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`
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`
`d2
`
`d3
`
`SAMSUNG, EXH. 1006, P. 5
`
`

`

`Patent Application Publication Jan. 27, 2005 Sheet 5 of 27
`
`US 2005/0017765 Al
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`SAMSUNG, EXH. 1006, P. 6
`
`

`

`Patent Application Publication Jan. 27, 2005 Sheet 6 of 27
`
`US 2005/0017765 Al
`
`FIG. 6
`
`100A
`~
`
`SYSTEM CONTROLLER
`
`140A
`
`SCANNING
`CONTROL
`SIGNAL
`
`DATA
`CONTROL
`SIGNAL
`
`DATA DRIVER
`
`110A
`
`DISPLAY PANEL
`
`TIMING SIGNAL
`
`VIDEO DISPLAY
`SIGNAL SIGNAL
`---GENERATION
`CIRCUIT
`
`DISPLAY DATA
`
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`w
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`
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`en
`
`120A
`
`SAMSUNG, EXH. 1006, P. 7
`
`

`

`Patent Application Publication Jan. 27, 2005 Sheet 7 of 27
`
`US 2005/0017765 Al
`
`FIG. 7
`
`DATA CONTROL
`
`SIGNAL 9
`
`DATA DRIVER
`
`130A
`
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`
`·--··7
`-+ - - - " - -
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`
`DISPLAY DATA
`
`SCANNING
`CONTROL
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`
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`SSTR
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`
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`
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`
`SB
`
`120A
`
`SAMSUNG, EXH. 1006, P. 8
`
`

`

`Patent Application Publication Jan. 27, 2005 Sheet 8 of 27
`
`US 2005/0017765 Al
`
`FIG. 8
`
`(FROM DATA DRIVER)
`
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`
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`
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`DRIVER)
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`SAMSUNG, EXH. 1006, P. 9
`
`

`

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`FIG. 9
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`SAMSUNG, EXH. 1006, P. 10
`
`

`

`FIG. 10
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`SAMSUNG, EXH. 1006, P. 11
`
`

`

`FIG. 11
`
`SELECTION SETTING
`SIGNALSEL
`
`RETRACE LINE PERIOD (LOAD LATCH)
`RETRACE LINE PERIOD (LOAD LATCH)
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`
`SAMSUNG, EXH. 1006, P. 12
`
`

`

`Patent Application Publication Jan. 27, 2005 Sheet 12 of 27
`
`US 2005/0017765 Al
`
`FIG. 12
`
`ONE SCANNING PERIOD Tse
`LIGHT GENERATION
`WRITE-IN OPERATION
`:
`'-----6:-, ,. : "' OPERATION PERIOD Tnse
`PERIOD Tse
`
`HIGH _TL _ : .
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`Patent Application Publication Jan. 27, 2005 Sheet 16 of 27
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`Patent Application Publication Jan. 27, 2005 Sheet 17 of 27
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`SAMSUNG, EXH. 1006, P. 19
`
`

`

`FIG. 19
`130Ca SIDE: DATA OUTPUT OPERATION (i+1)
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`SAMSUNG, EXH. 1006, P. 20
`
`

`

`FIG. 20
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`SAMSUNG, EXH. 1006, P. 21
`
`

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`FIG. 21
`DATA TAKE-IN SELECTION PERIOD (i <in>)
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`SAMSUNG, EXH. 1006, P. 22
`
`

`

`133E
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`SAMSUNG, EXH. 1006, P. 23
`
`

`

`FIG. 23
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`SAMSUNG, EXH. 1006, P. 24
`
`

`

`FIG. 24
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`SAMSUNG, EXH. 1006, P. 25
`
`

`

`Patent Application Publication Jan. 27, 2005 Sheet 25 of 27
`
`US 2005/0017765 Al
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`US 2005/0017765 Al
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`Jan.27,2005
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`1
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`CURRENT GENERATION

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