US007558977B2
`
`(12) United States Patent
`Kim et al.
`
`(10) Patent No.:
`(45) Date of Patent:
`
`US 7,558,977 B2
`Jul. 7, 2009
`
`(54) DEVICE AND METHOD FOR POWER
`MANAGEMENT INA DISPLAY DEVICE
`
`(75) Inventors: Dae Hyun Kim, Busan (KR): Tae Hwa
`Lee, Daegu (KR)
`s
`9.
`(73) Assignee: LG Electronics Inc., Seoul (KR)
`(*) Notice:
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 441 days.
`(21) Appl. No.: 11/450,301
`
`(22) Filed:
`
`Jun. 12, 2006
`
`(65)
`
`Prior Publication Data
`US 2006/0282693 A1
`Dec. 14, 2006
`
`Foreign Application Priority Data
`(30)
`Jun. 13, 2005
`(KR) ...................... 10-2005-005O178
`Aug. 12, 2005 (KR) ...................... 10-2005-OO74149
`
`(51) Int. Cl.
`(2006.01)
`G06F I/32
`(52) U.S. Cl. ..................... 713/320; 713/300; 348/14.04
`(58) Field of Classification Search ................. 713/320,
`713/300
`See application file for complete search history.
`References Cited
`U.S. PATENT DOCUMENTS
`
`(56)
`
`5,477,279 A * 12/1995 Chang ........................ 348,730
`5,634,798 A * 6/1997 Suh ........
`... 434,307 A
`5,900,913 A * 5/1999 Tults .......................... 348/468
`6,285.406 B1 ck
`9, 2001 Brusky - - - - - -
`... 348,552
`6,900,849 B1* 5/2005 Friedreich.
`... 348,730
`6,985, 191 B2
`1/2006 Choi .......................... 348,730
`FOREIGN PATENT DOCUMENTS
`1998-020617
`8, 1998
`KR
`WO WO 2004/091212
`10, 2004
`OTHER PUBLICATIONS
`Korean Office Action dated Oct. 30, 2006.
`* cited b
`c1ted by examiner
`Primary Examiner Nitin C Patel
`(74) Attorney, Agent, or Firm—Ked & Associates, LLP
`(57)
`ABSTRACT
`
`A display device for managing power Supply in an active
`stand-by mode is disclosed. More specifically, the display
`device includes a signal mode Supply unit which provides
`control signals for a mode in which a digital cable ready
`(DCR) feature is selected or for a mode in which a digital
`Video recorder (DVR) feature and a signal processing circuit
`are selected. Furthermore, the device includes a stand-by
`power supply unit for supplying power for operating a micro
`computer and for operating at least one DCR feature if the
`DCR feature is selected, and a multi-power supply unit for
`Supplying power for operating at least one DVR feature and
`for operating a signal processing circuit if the DVR feature is
`selected.
`
`5,036,261 A
`
`7, 1991 Testin ......................... 315,411
`
`23 Claims, 9 Drawing Sheets
`
`31
`
`32
`
`33
`
`-1 34a
`O-
`STSV
`34v -o16
`
`35
`
`ST5W for Micom
`
`- ST5W for DCR
`STSV for DCR
`POD insert:ON
`POD delete:OFF
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`37
`
`DWR feature:ON
`
`
`
`
`
`
`
`
`
`multi-power
`Supply unit
`
`display power
`Supply unit
`
`4.
`
`modesignal
`supply unit
`
`36
`
`VIZIO, Inc. Exhibit 1007
`VIZIO, Inc. v. Maxell, LTD, IPR2022-01459
`Page 1 of 16
`
`

`

`U.S. Patent
`
`Jul. 7, 2009
`
`Sheet 1 of 9
`
`US 7,558,977 B2
`
`FIG. 1
`
`
`
`5
`
`second
`unit
`
`6
`
`PFC
`
`4.
`
`micro computer
`power Supply unit
`
`7
`
`signal processor
`
`8
`
`display power
`power supply unit
`
`VIZIO, Inc. Exhibit 1007
`VIZIO, Inc. v. Maxell, LTD, IPR2022-01459
`Page 2 of 16
`
`

`

`U.S. Patent
`
`Jul. 7, 2009
`
`Sheet 2 of 9
`
`US 7,558,977 B2
`
`FIG. 2
`
`
`
`micro computer
`power Supply unit
`
`signal processor
`power supply unit
`
`display power
`supply unit
`
`VIZIO, Inc. Exhibit 1007
`VIZIO, Inc. v. Maxell, LTD, IPR2022-01459
`Page 3 of 16
`
`

`

`U.S. Patent
`
`Jul. 7, 2009
`
`Sheet 3 of 9
`
`US 7,558,977 B2
`
`
`
`Wg
`?ÌNH
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`
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`?un Á?ddns I3Mod ["~~~
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`
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`L– – –
`
`pub?IIIIoo
`
`VIZIO, Inc. Exhibit 1007
`VIZIO, Inc. v. Maxell, LTD, IPR2022-01459
`Page 4 of 16
`
`

`

`U.S. Patent
`
`Jul. 7, 2009
`
`Sheet 4 of 9
`
`US 7,558,977 B2
`
`
`
`?un Á?ddns JøMod
`
`
`
`I?InduI00 010?u
`
`VIZIO, Inc. Exhibit 1007
`VIZIO, Inc. v. Maxell, LTD, IPR2022-01459
`Page 5 of 16
`
`

`

`U.S. Patent
`
`Jul. 7, 2009
`
`Sheet 5 of 9
`
`US 7,558,977 B2
`
`
`
`08
`"?INH
`
`???t?
`
`VIZIO, Inc. Exhibit 1007
`VIZIO, Inc. v. Maxell, LTD, IPR2022-01459
`Page 6 of 16
`
`

`

`U.S. Patent
`
`Jul. 7, 2009
`
`Sheet 6 of 9
`
`US 7,558,977 B2
`
`FIG. 4
`
`Start
`
`convert AC power to DC power
`
`S501
`
`No
`
`S502
`
`Yes
`
`supply DC power to micro
`computer power supply unit
`
`S503
`
`S504
`
`active stand-by mode?
`
`supply DC power to micro computer
`power supply unit and signal processor
`power Supply unit
`
`S505
`
`normal mode?
`
`supply DC power to all power supply
`units
`
`S507
`
`user controls all display device
`functions
`
`S508
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`VIZIO, Inc. Exhibit 1007
`VIZIO, Inc. v. Maxell, LTD, IPR2022-01459
`Page 7 of 16
`
`

`

`U.S. Patent
`
`US 7,558,977 B2
`
`
`
`
`
`
`
`
`
`9 %)I, H
`
`SZ
`
`CHd
`
`VIZIO, Inc. Exhibit 1007
`VIZIO, Inc. v. Maxell, LTD, IPR2022-01459
`Page 8 of 16
`
`

`

`U.S. Patent
`
`Jul. 7, 2009
`
`Sheet 8 of 9
`
`US 7,558,977 B2
`
`
`
`
`
`JOMOd Ág|dsp
`
`
`
`
`
`VIZIO, Inc. Exhibit 1007
`VIZIO, Inc. v. Maxell, LTD, IPR2022-01459
`Page 9 of 16
`
`

`

`U.S. Patent
`
`Jul. 7, 2009
`
`Sheet 9 Of 9
`
`US 7,558,977 B2
`
`FIG. 7
`
`micro computer
`signalboard
`
`PDP power board
`
`supply stand-by powe
`
`insert POD card
`
`O
`WR
`select DVR function
`
`function check
`O
`on/off? -
`off
`
`supply DCR power
`
`fmulti-powe
`on/off?
`Off
`
`O
`
`supply DWR and
`signal circuit power
`
`SE) or
`
`O
`
`supply PDP module
`
`off
`
`VS/Va
`on/off?
`off
`
`O
`
`supply PDP
`module power
`
`VIZIO, Inc. Exhibit 1007
`VIZIO, Inc. v. Maxell, LTD, IPR2022-01459
`Page 10 of 16
`
`

`

`1.
`DEVICE AND METHOD FOR POWER
`MANAGEMENT INA DISPLAY DEVICE
`
`US 7,558,977 B2
`
`This application claims the benefit of Korean Application
`No. P10-2005-00501.78, filed on Jun. 13, 2005, and of Korean
`Application No. P10-2005-0074149, filed on Aug. 12, 2005,
`which are hereby incorporated by reference.
`
`5
`
`BACKGROUND OF THE INVENTION
`
`10
`
`15
`
`25
`
`30
`
`35
`
`1. Field of the Invention
`The present invention relates to a device and method of
`managing power, and more particularly, to a device and
`method for power management in a display device.
`2. Discussion of the Related Art
`In a conventional display device having a digital cable
`ready (DCR) function, there are two modes associated power
`management, namely, stand-by mode and normal mode. In
`stand-by mode, a minimum amount of power (e.g., amount of
`power just enough to receive signals from a remote control
`device) is Supplied to the display device. In normal mode, a
`Sufficient amount of power is Supplied to the display device
`enabling a user to normally operate and control the display
`device.
`FIG. 1 is a block diagram illustrating an operation of power
`management units of a display device in stand-by mode. In
`FIG. 1 where the display device 1 is in stand-by mode, an
`alternating current (AC) is Supplied to the AC power input
`unit 2. However, because a switch (SW1) is turned off or
`open, the AC power follows the path where power is supplied
`only to a first rectifying unit 3 which is connected to a micro
`computer power Supply unit 4. In the second rectifying unit 5.
`the AC power supplied to the first rectifying unit 3 is con
`verted AC power to a direct current (DC) power, which is then
`Supplied to the power Supply unit 4.
`FIG.2 is a block diagram illustrating an operation of power
`management units of a display device in normal mode. In
`40
`FIG. 2 where the display device 1 is in normal mode, the AC
`power is supplied to the AC power input unit 8. Here, because
`the switch (SW2) is turned on or closed, the AC power is
`supplied not only to the first rectifying unit 9 but also to the
`second rectifying unit 11. The second rectifying unit 11 is
`connected with a power Supply unit for signal processing 13
`and a power Supply unit for display 14. In addition, the first
`rectifying unit 9 converts the AC power to the DC power, and
`then transmits the converted DC current to the micro com
`puter power supply unit 10. Furthermore, the second rectify
`50
`ing unit 11 converts the AC power to the DC power, and then
`transmits the converted DC current to a power factor correc
`tion (PFC) unit 12. The PFC unit 12 thereafter supplies to all
`the power supply units including the DC power to the power
`Supply unit for signal processing 13 and the power Supply unit
`for display 14. Here, the PFC unit 12 refers to a type of a
`power-saving circuit added to the power management device
`in order to improve power efficiency.
`The power supply units of the display device have the
`following problems. First, according to the power manage
`ment units of the conventional display device only have two
`modes, namely, stand-by mode and normal mode, a user
`cannot turn on or operate the display module unless in normal
`mode. In addition, the problem of normal mode is that power
`is Supplied to the display module unnecessarily even if the
`user does not wish to view the display or to have power
`provided to the display module.
`
`45
`
`55
`
`60
`
`65
`
`2
`In addition, even when only minimum amount of power is
`Supplied to the power management units, power is passed
`through the PFC unit, resulting in inefficient power manage
`ment.
`
`SUMMARY OF THE INVENTION
`
`Accordingly, the present invention is directed to a device
`and method for power management in a display device that
`substantially obviates one or more problems due to limita
`tions and disadvantages of the related art.
`An object of the present invention is to provide a display
`device for managing power Supply in an active stand-by
`mode.
`Another object of the present invention is to provide a
`method of managing power in a display device in active
`stand-by mode.
`Additional advantages, objects, and features of the inven
`tion will be set forth in part in the description which follows
`and in part will become apparent to those having ordinary
`skill in the art upon examination of the following or may be
`learned from practice of the invention. The objectives and
`other advantages of the invention may be realized and
`attained by the structure particularly pointed out in the written
`description and claims hereofas well as the appended draw
`ings.
`To achieve these objects and other advantages and inaccor
`dance with the purpose of the invention, as embodied and
`broadly described herein, a display device for managing
`power Supply in an active stand-by mode includes a signal
`mode supply unit which provides control signals for a mode
`in which a digital cable ready (DCR) feature is selected or for
`a mode in which a digital video recorder (DVR) feature and a
`signal processing circuit are selected. Furthermore, the
`device includes a stand-by power Supply unit for Supplying
`power for operating a micro computer and for operating at
`least one DCR feature if the DCR feature is selected, and a
`multi-power Supply unit for Supplying power for operating at
`least one DVR feature and for operating a signal processing
`circuit if the DVR feature is selected.
`In another aspect of the present invention, a method of
`managing power in a display device in active stand-by mode
`includes determining whether a digital cable ready (DCR)
`feature is selected and Supplying power to a power Supply unit
`for operating a micro computer and for operating at least one
`DCR feature if the DCR feature is selected.
`In further aspect of the present invention, a method of
`managing power in a display device in active stand-by mode
`includes determining whether a digital personal recorder
`(DVR) feature is selected and supplying power to a first
`power Supply unit for operating the micro computer, and a
`second power Supply unit for operating at least one DVR
`feature and for operating a signal processing circuit if the
`DVR feature is selected.
`Yet, in another aspect of the present invention, a display
`device for managing power Supply in an active stand-by mode
`includes an alternating current (AC) input unit for receiving
`the AC power, a rectifying unit for converting the AC power to
`a direct current (DC) power, and a switch unit for directing
`power to be Supplied to a signal processor power Supply unit
`and a micro computer power Supply unit.
`It is to be understood that both the foregoing general
`description and the following detailed description of the
`present invention are exemplary and explanatory and are
`intended to provide further explanation of the invention as
`claimed.
`
`VIZIO, Inc. Exhibit 1007
`VIZIO, Inc. v. Maxell, LTD, IPR2022-01459
`Page 11 of 16
`
`

`

`US 7,558,977 B2
`
`3
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`The accompanying drawings, which are included to pro
`vide a further understanding of the invention and are incor
`porated in and constitute a part of this application, illustrate
`embodiment(s) of the invention and together with the descrip
`tion serve to explain the principle of the invention. In the
`drawings;
`FIG. 1 is a block diagram illustrating an operation of power
`management units of a display device in stand-by mode;
`FIG.2 is a block diagram illustrating an operation of power
`management units of a display device in normal mode;
`FIGS. 3a-3c are block diagrams illustrating operation of
`stand-by mode, active stand-by mode, and normal mode,
`respectively;
`FIG. 4 is a flowchart illustrating the operation of the power
`management unit of the display device;
`FIG. 5 is another block diagram illustrating power man
`agement units in a display device;
`FIG. 6 is a block diagram illustrating a structure of a power
`management device of a display device according to the
`embodiment of the present invention; and
`FIG. 7 is flowchart illustrating the operation of the power
`Supply units of the display device.
`
`10
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`15
`
`DETAILED DESCRIPTION OF THE INVENTION
`
`25
`
`4
`In FIG. 3a, the power management mode is in stand-by
`mode. After the user selects using the command input unit
`200 stand-by mode, the control unit 190 controls the switch
`ing unit 150 so that the DC power can be supplied to the power
`supply unit of the micro computer 140. More specifically, the
`switch to the micro computer power supply unit 140 is turned
`on or closed so that power can be supplied while the switches
`to the power Supply unit of the signal processing unit 170 and
`the power supply unit of the display unit 180 are turned off or
`opened so that power cannot be supplied.
`In FIG.3b, the power management mode is active stand-by
`mode. In active stand-by mode, as in FIG. 3a, the DC power
`is Supplied to the micro computer power Supply unit 140.
`Furthermore, the DC power is also supplied to the power
`Supply unit of the signal processing unit 170. Although power
`can be supplied via the PFC unit 160, if low amount of power
`(low power consumption) is Supplied, the DC power can be
`Supplied directly to the power Supply unit without going
`through the PFC unit 160.
`In FIG. 3c, the power management mode is normal mode.
`In normal mode, power is Supplied to all power Supply units,
`including the micro computer power Supply unit 140, the
`power Supply unit of the signal processing unit 170, and the
`power supply unit of the display unit 180. Different from
`FIGS. 3a and 3b, the DC power passes through the PFC unit
`160 before being supplied to the power supply unit of the
`signal processing unit 170 and the power Supply unit of the
`display unit 180.
`FIG. 4 is a flowchart illustrating the operation of the power
`management unit of the display device. In FIG. 4, after AC
`power is inputted, it is thereafter converted to DC power in the
`rectifying unit (S501). Next, the display device determines
`the status of the power management mode or which power
`management mode was selected by the user (S502). If the
`user has selected stand-by mode, DC power is provided only
`to the micro computer power supply unit (S503). If it is
`determined that the power management mode is not stand-by
`mode, further determination is made to check if the user has
`selected active stand-by mode (S504). If the selected power
`management mode is active stand-by mode, poweris Supplied
`to the power Supply unit of the signal processing unit, without
`passing through the PFC unit, and to the micro computer
`power supply unit (S505). If, however, the user selected
`power management mode is neither stand-by mode nor active
`stand-by mode, then further determination is made to deter
`mine whether the user has selected normal mode (S506). If so,
`power is provided to all power Supply units, including the
`micro computer power Supply unit, the power Supply unit of
`the signal processing unit, and the power Supply unit of the
`display unit (S507). Furthermore, in normal mode, the user
`can control all the functions of the display device since power
`is supplied to all units (S508)
`FIG. 5 is another block diagram illustrating power man
`agement units in a display device. In FIG. 5, the power man
`agement unit includes an AC power Supply unit 21; a rectify
`ing unit 29 for converting the AC power to DC power; a
`stand-by power Supply unit 22 for Supplying 5V to micro
`signal board using the DC power during stand-by mode; a
`PFC 23 for efficiently correcting power supplied during
`stand-by mode or normal mode; a multiple power Supply unit
`24 for supplying the DCR power (e.g., 3.4V, 19V, 12V, and
`6V), a digital video recorder (DVR) power, and signal circuit
`power during stand-by mode, and Supplying the display
`power (e.g., 5V) to the display module during active mode; a
`display power Supply unit 25 for Supplying display power (VS
`and Va) to the display module; and a plurality of switches (i.e.,
`SW126, SW2 27, SW328). Here, the SW126 is turned on or
`
`30
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`35
`
`40
`
`45
`
`Reference will now be made in detail to the preferred
`embodiments of the present invention, examples of which are
`illustrated in the accompanying drawings. Wherever pos
`sible, the same reference numbers will be used throughout the
`drawings to refer to the same or like parts.
`Provided below is an embodiment of the present invention.
`Compared to the conventional display device which was lim
`ited to having only two modes, the embodiment of the present
`invention includes an active stand-by mode in addition to
`stand-by mode and normal mode.
`Here, the newly introduced active stand-by mode is a mode
`between stand-by mode and normal mode. More specifically,
`in stand-by mode, a minimum amount of power (for Supply
`ing power to the micro computer) is provided, and in normal
`mode, power is Supplied to all power Supply units. In active
`stand-by mode, power is Supplied to the micro computer and
`another power Supply unit, but not to all power Supply units,
`as is the case in normal mode.
`Active stand-by mode can be selected in a display device
`having a digital cable ready (DCR) feature. In this case,
`preferably, power is supplied to the power supply unit of the
`signal processing unit and the micro computer power Supply
`unit, but not to the power Supply unit of the display unit.
`50
`FIGS. 3a-3c are block diagrams illustrating operation of
`stand-by mode, active stand-by mode, and normal mode,
`respectively. In these figures, an AC power is inputted from an
`outside source to the AC input unit 120. The rectifying unit
`130 converts AC power into DC power. Thereafter, the DC
`55
`power, based on the status (i.e., on or off) of the switch(es) in
`the switching unit 150, is supplied to a specific power supply
`unit. At the same time, the command input unit 200 receives
`a selection from a user with respect to the type of power
`management mode for the display device. The control unit
`190 controls the switching unit 150 according to the power
`management mode selected by the user. Here, the Switching
`unit 150 routes power from the rectifying unit 130 to the
`specific power Supply unit according to the control instruc
`tions from the control unit 190. In these figures, the PFC unit
`160 is a power-saving circuit added to the power management
`unit to provide power efficiency.
`
`60
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`65
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`VIZIO, Inc. Exhibit 1007
`VIZIO, Inc. v. Maxell, LTD, IPR2022-01459
`Page 12 of 16
`
`

`

`5
`closed during stand-by mode and active mode while the SW2
`27 and SW3 28 are only turned on or closed during active
`mode.
`As discussed above, the conventional display device pre
`vents the display power being Supplied to the display module
`and maintains power Supply to the signal board in order to use
`the DVR/DCR functions. This type of power management
`mode is referred to as active stand-by mode, and in order to
`Sustain the active stand-by mode, the micro computer con
`trols the multiple power supply unit within the power supply
`unit (PSU) and supplies power to the DCR, DVR, and circuit.
`In other words, in the conventional stand-by mode, Supplying
`power to the display module was prevented while Supplying
`power to the signal board was maintained in order to use the
`DCR/DVR features. Furthermore, the multi-power supply
`unit can be controlled (e.g., turned on/off); therefore, power
`for the DVR feature is not unnecessarily supplied even when
`the DVR feature is not utilized.
`Provided below is an example of another embodiment of
`the present invention. Compared to the display device of the
`previous embodiment having three modes (stand-by, active
`stand-by, and normal), this embodiment presents further
`divides active stand-by mode into a first active stand-by mode
`and a second stand-by mode.
`Here, the power management modes of the display device
`as explained above, including the first and second active
`stand-by modes, are not limited to the terms as explained
`here, but other terms or languages can be used to describe the
`same or similar functions of the power management modes of
`the display device.
`As discussed above, the operation of the first and second
`active stand-by modes fall between stand-by mode and the
`normal mode. Stand-by mode is a mode which Supplies mini
`mum amount of power, enough to turn on power to the display
`device upon receiving a power on command from a remote
`control device, for example. In stand-by mode, power is pro
`vided only to the micro computer. On the other hand, normal
`mode is a mode in which power is Supplied to all the power
`supply units of the display device. As for the first active
`stand-by mode, poweris Supplied to at least one power Supply
`unit for operation of the micro computer and for operating the
`DCR feature. As for the second active stand-by mode, power
`is Supplied to at least one power Supply unit for the operation
`of the micro computer, for the operation of the DVR feature,
`and for the operation of the signal processing unit. In addition,
`power can be supplied to at least one display in the second
`active stand-by mode.
`There is no limit to the number of active stand-by modes.
`For example, in the active stand-by mode, it is preferable to
`Supply power to the micro computer and to the signal proces
`Sor but not to the display module to the display device having
`the DCR/DVR features. The reason is that the display module
`requires high power consumption, the user may choose to use
`other features, such as recording, without using the display.
`In case of a plasma display panel (PDP), for example, the
`power Supply unit of the display module can be used as a
`power supply unit of the PDP. In case of a liquid crystal
`display (LCD), for example, the power supply unit of the
`display module can be used as an inverter power Supply unit.
`Lastly, in case of a cathode ray tube (CRT), for example, the
`power Supply unit of the display module can be used as a
`deflection unit.
`FIG. 6 is a block diagram illustrating a structure of a power
`management device of a display device according to the
`embodiment of the present invention. In FIG. 6, the power
`Supply units includes a signal processor circuit 39, a display
`unit 44 (hereinafter referred to as “PDP module'), a signal
`
`25
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`35
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`40
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`45
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`50
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`US 7,558,977 B2
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`control Supply unit 43, a signal board micro computer (or
`micro computer) 35, a stand-by power supply unit 33, and a
`multi-power supply unit 38. The mode signal supply unit 43
`provides signal for DVR mode or DCR mode, and the signal
`board micro computer 35 provides control signals per
`selected mode after ceasing power supply to the PDP module
`36 in response to the selected mode. Furthermore, in response
`to the control signal in DCR mode, the stand-by power supply
`unit 33 supplies power for operation of at least one DCR
`feature. Also, in response to the control signals in DVR mode,
`the multi-power supply unit 38 provides power for the signal
`processor circuit 39 and for operation of at least one DVR
`feature.
`The power supply device of FIG. 6 further includes an AC
`power input unit 31, a rectifying unit 32, a power Supply unit
`for the display unit 41, a PFC 37, a first switch (SW1) 36, a
`second switch (SW2)40, and a first third switch(SW3-1)34a,
`and a second third switch (SW3-2) 34b. In detail, the AC
`power input 31 receives AC power, while the rectifying unit
`32 converts the received AC power to DC power. The display
`power supply unit 41 supplies power for display to the PDP
`module 44. The SW136 can connect or disconnect supplying
`of power supply between the AC power input 31 and the PFC
`37. Moreover, the SW240 can disconnect supplying of power
`between the rectifying unit 32 and the display power unit 41
`during DCR mode or DVR mode. Furthermore, in response to
`the control signal from the micro computer 35 instructing
`power to be supplied for the DCR feature, the SW3-134a and
`the SW3-234b can connect or disconnect power from being
`supplied for at least one DCR feature from the stand-by power
`supply unit 33.
`The DCR mode control signal includes a signal for turning
`on the Switch whose action corresponds to inserting of a Point
`of Deployment (POD) card, and a signal for turning off the
`switch whose action corresponds to taking out of the POD
`card. Here, power being Supplied for the micro computer is
`5V, power for operation of at least one DCR feature in DCR
`mode are 5V and 3.4V, and power for operation of at least one
`DVR feature in DVR mode and power for signal processing
`are 19V, 12V, and 6V.
`Alternatively, in normal mode, the multi-power Supply unit
`38 supplies power (5V) to the PDP module 44 via a fourth
`switch (SW4) 42. As discussed above, the display device can
`be a television having DCR and/or DVR features and/or can
`be a PDP.
`The AC input 31 receives AC power from an outside
`source. Thereafter, the rectifying unit 32 converts the inputted
`AC power to DC power. The signal processor 43 supplies
`mode signals necessary for managing power to the display
`device. In addition, the signal processor Supplies the signals
`for whether the POD card in inserted or not, based on the
`selected DCR feature and/or mode signals corresponding to
`the Selected DVR feature.
`The micro computer 35 controls all four switches (SW1
`SW4) based on the mode signals provided from the mode
`signal Supply unit 43. Here, the mode signal Supply unit 43
`receives the mode selection input from the user, and based on
`the selected mode, the mode signal Supply unit 43 Supplies
`corresponding signals to the micro computer 35. That is, the
`micro computer 35 controls the power on/off of the SW1
`SW4 to supply power to the units of the display device as
`instructed by the mode signals. Again, the mode signals cor
`respond to the selected power management mode of the dis
`play device selected by the user.
`The PFC 37 refers to a power-saving circuit provided
`between the AC input 31 and the power supply units, such as
`
`VIZIO, Inc. Exhibit 1007
`VIZIO, Inc. v. Maxell, LTD, IPR2022-01459
`Page 13 of 16
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`US 7,558,977 B2
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`the stand-by power supply unit 33, the multi power supply
`unit 38, and the display power supply unit 41, in order to
`improve power efficiency.
`The four switches, namely, SW136, SW240, SW334 (i.e.,
`SW3-134a and SW3-2 34b), and SW442, are determined
`according to the mode signals provided from the mode signal
`supply unit 43 selected by a user. Here, as described above,
`the determined mode signal can by any one of the signal for
`stand-by mode, the first active stand-by mode, the second
`active stand-by mode, and normal mode. The mode signal
`Supply unit 43 can be a remote control unit or buttons pro
`vided on the display device and also can be other sources.
`The operations of the power management modes are as
`follows. If the power management mode is stand-by mode,
`the micro computer 35 opens the SW1-SW4, and the DC
`15
`power for the micro computer 35 only is provided.
`Next, the first active stand-by mode means that the user has
`selected the DCR feature. Here, the micro computer 35 turns
`on or closes the SW136, in turn allowing the stand-by power
`supply unit 33 to supply power to the micro computer 35 and
`for at least one DCR feature. However, the other three
`switches (i.e., SW240, SW334, and SW442) are turned off
`or opened so that power is not supplied for operating at least
`one DVR feature and the signal circuit. At the same time,
`power is not supplied to the PDP module 44 which requires
`high power consumption. Furthermore, in stand-by mode, a
`minimum amount of power is Supplied; therefore, the AC
`power should not be supplied to the PFC 37. In other words,
`if the power being Supplied is Small, it is more efficient and
`preferable to directly supply power for operating the DCR
`30
`instead of providing the powerfor operating the DCR feature
`through the PFC 37.
`If the selected mode is the second active stand-by mode, it
`means that the user has selected the DVR feature. Here, the
`micro computer 35 turns on or closes the SW240 in order to
`allow the stand-by power supply unit 33 to supply power for
`the micro computer 35, and the multi power supply unit 38 to
`Supply power to the signal processing unit 39 for providing
`power for at least one DVR feature and the signal circuit. As
`for the other three switches (i.e., SW134, SW34, and SW4
`40
`42), these switches are turned off or opened so as to prevent
`power from being Supplied for the operation of at least one
`DCR feature and for the PDP module 44. In this mode, since
`relatively large amount of power is Supplied, power can be
`supplied through the PFC37, which passes through the closed
`SW240. Here, the signal processing unit can be a sound card,
`memory, and a hard disk drive (HDD), for example.
`If the power Supply device is in normal mode, the normal
`mode signal is provided via the mode signal Supply unit 43.
`Here, the micro computer 35 turns on or closes all four
`switches (SW1-SW4) in order to close the path so that power
`can be supplied to all the power supply units. Here, power for
`at least one DCR feature can be supplied from the stand-by
`power supply unit. Moreover, the multi-power supply unit 38
`supplies power to the signal circuit 39 so that power for
`operating at least one DVR feature and the signal circuit can
`be provided. Also, power for operating at least one display
`can be supplied to the PDP module 44. Since supplying power
`for display requires high power consumption, the power can
`be supplied to the PFC 37 via the SW136. Furthermore, in
`normal mode, power for operating feature and units are
`passed through the PFC 37 before being supplied to other
`units. Here, the multi-power supply unit 38, which supplies
`power to the signal processing unit 39, also can also supply
`power (i.e., 5V) to the PDP module 44 via the SW442.
`Next, an operation of the power supply device will be
`explained according to the embodiment of the present inven
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`tion with reference to FIG. 7. FIG. 7 is flowchart illustrating
`the operation of the power Supply units of the display device.
`As illustrated in FIG. 7, the operation of the power supply
`device can be divided into two categories. The first category
`relates to the operation from the micro computer signal board
`35, and the second category relates to the operation from the
`PDP power board.
`An embodiment of the present invention relates to inde
`pendently managing powerfor operating the DCR feature and
`the DVR feature. For example, in a display device having a
`micro computer, a signal processing circuit, and a display
`unit, corresponding signal for the DCR mode and/or the DVR
`mode can be selected by a user. According to the DCR/DVR
`mode signal, power Supplied for operating display is cut off
`while providing power control signals corresponding to the
`mode. More specifically, by responding to the power control
`signal of the DCR mode, power for operating at least one
`DCR is supplied along with power for operating the micro
`computer. In respond to the power control signal of the DVR
`mode, powerfor operating at least one DVR is Supplied along
`wi