I 1111111111111111 11111 1111111111 11111 11111 1111111111 11111 lll111111111111111
`US007800706B2
`
`c12) United States Patent
`Kim et al.
`
`(IO) Patent No.:
`(45) Date of Patent:
`
`US 7,800, 706 B2
`Sep.21,2010
`
`(54) COOLING FAN UNIT AND DISPLAY
`APPARATUS HAVING THE SAME
`
`(75)
`
`Inventors: Sun-jin Kim, Suwon-si (KR);
`Seung-hoon Oh, Yongin-si (KR)
`
`(73)
`
`Assignee: Samsung Electronics Co., Ltd.,
`Suwon-si (KR)
`
`( *)
`
`Notice:
`
`Subject to any disclaimer, the term ofthis
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 337 days.
`
`(21) Appl. No.: 11/778,138
`
`(22) Filed:
`
`Jul. 16, 2007
`
`(65)
`
`Prior Publication Data
`
`US 2008/0089028 Al
`
`Apr. 17, 2008
`
`(30)
`
`Foreign Application Priority Data
`
`6,522,543 B2 *
`7,259,964 B2 *
`2003/0128503 Al*
`2006/0070280 Al
`2006/0104023 Al
`
`2/2003 Kurihara et al. ............. 361/704
`8/2007 Yamamura et al. .......... 361/697
`7/2003 Takahashi ................... 361/681
`4/2006 Yamamura et al.
`5/2006 Lee et al.
`
`FOREIGN PATENT DOCUMENTS
`
`CN
`JP
`JP
`KR
`KR
`
`1780548 A
`9-270975 A
`2004-029388 A
`2003-071073 A
`2006-026748 A
`
`5/2006
`10/1997
`1/2004
`9/2003
`3/2006
`
`OTHER PUBLICATIONS
`
`Office Action dated Jun. 11, 2010 issued by State Intellectual Prop(cid:173)
`erty Office of PR China in Chinese Patent Application No.
`200710146279.4.
`
`* cited by examiner
`
`Primary Examiner-Sung H Pak
`(74) Attorney, Agent, or Firm-Sughrue Mion, PLLC
`
`Oct. 16, 2006
`
`(KR)
`
`...................... 10-2006-0100537
`
`(57)
`
`ABSTRACT
`
`(51)
`
`Int. Cl.
`G02F 111333
`(2006.01)
`(52) U.S. Cl. ........................................................ 349/58
`(58) Field of Classification Search ....................... None
`See application file for complete search history.
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`5,991,153 A * 11/1999 Heady et al ................. 361/704
`6,104,451 A *
`8/2000 Matsuoka et al.
`............. 349/58
`6,476,883 Bl * 11/2002 Salimes et al. ................ 349/58
`
`A display apparatus having a casing in which an opening part
`is formed, includes: a liquid crystal display panel that is
`supported by the casing so that an image can be displayed
`through an opening part; a backlight unit that is provided
`behind the liquid crystal display panel and has a light source
`that emits light; a shield cover that is provided behind the
`backlight unit and is supported by at least one of the backlight
`unit and the casing; and a cooling fan unit that is combined to
`the shield cover and supplies cooling air to the backlight unit.
`
`11 Claims, 6 Drawing Sheets
`
`231
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`230
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`SEC et al. v. MRI
`SEC Exhibit 1005.001
`IPR 2023-00199
`
`

`

`U.S. Patent
`
`Sep.21,2010
`
`Sheet 1 of 6
`
`US 7,800,706 B2
`
`FIG. 1
`
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`105
`
`SEC et al. v. MRI
`SEC Exhibit 1005.002
`IPR 2023-00199
`
`

`

`U.S. Patent
`
`Sep.21,2010
`
`Sheet 2 of 6
`
`US 7,800,706 B2
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`SEC et al. v. MRI
`SEC Exhibit 1005.003
`IPR 2023-00199
`
`

`

`U.S. Patent
`
`Sep.21,2010
`
`Sheet 3 of 6
`
`US 7,800,706 B2
`
`FIG. 3
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`SEC et al. v. MRI
`SEC Exhibit 1005.004
`IPR 2023-00199
`
`

`

`U.S. Patent
`
`Sep.21,2010
`
`Sheet 4 of 6
`
`US 7,800,706 B2
`
`FIG. 4
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`SEC et al. v. MRI
`SEC Exhibit 1005.005
`IPR 2023-00199
`
`

`

`U.S. Patent
`
`Sep.21,2010
`
`Sheet 5 of 6
`
`US 7,800,706 B2
`
`FIG. 5
`
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`111
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`
`SEC et al. v. MRI
`SEC Exhibit 1005.006
`IPR 2023-00199
`
`

`

`U.S. Patent
`
`Sep.21,2010
`
`Sheet 6 of 6
`
`US 7,800,706 B2
`
`FIG. 6
`
`205
`(
`
`130 , . ......__
`
`BACKLIGHT
`UNIT
`
`i - - -
`
`FAN DRIVER
`
`120 ---- LIQUID CRYSTAL
`
`DISPLAY PANEL
`
`_,-....__ ..
`
`263
`
`USER
`SELECTION PART
`
`250
`/
`
`POWER SUPPLY
`
`COOLING FAN
`
`,-._,__
`210
`
`i
`1
`CONTROLLER
`
`(
`260
`
`STORING PART r----,
`261
`
`SEC et al. v. MRI
`SEC Exhibit 1005.007
`IPR 2023-00199
`
`

`

`US 7,800,706 B2
`
`1
`COOLING FAN UNIT AND DISPLAY
`APPARATUS HAVING THE SAME
`
`CROSS-REFERENCE TO RELATED
`APPLICATIONS
`
`This application claims priority from Korean Patent Appli(cid:173)
`cation No. 10-2006-0100537, filed on Oct. 16, 2006 in the
`Korean Intellectual Property Office, the disclosure of which is
`incorporated herein by reference in its entirety.
`
`BACKGROUND OF INVENTION
`
`5
`
`2
`According to an exemplary embodiment of the present
`invention, the light source comprises light emitting diodes
`(LEDs).
`According to an exemplary embodiment of the present
`invention, the shield cover is provided with a fan support that
`supports the cooling fan unit, the fan support being distanced
`from the casing and being formed at a position adjacent to the
`backlight unit.
`According to an exemplary embodiment of the present
`10 invention, the fan support is formed at a central lower portion
`of the shield cover.
`According to an exemplary embodiment of the present
`invention, the casing and the shield cover are provided with a
`plurality of air slits through which air generated by the cool-
`15 ing fan unit comes in and out.
`According to an exemplary embodiment of the present
`invention, the cooling fan unit comprises a cooling fan and a
`fan cover that has one side provided with a first combining
`part combined with the cooling fan and the other side pro-
`20 vided with a second combining part combined with the shield
`cover.
`According to an exemplary embodiment of the present
`invention, the first combining part comprises: a first support
`that supports the cooling fan and the fan cover; and a first
`joining member that joins the cooling fan with the fan cover.
`According to an exemplary embodiment of the present
`invention, the first combining part further comprises a first
`vibration absorption member that is disposed between a plu(cid:173)
`rality of the first supports and absorbs vibration generated
`30 from the cooling fan.
`According to an exemplary embodiment of the present
`invention, the second combining part comprises: a second
`support that supports the fan cover and the shield cover mutu(cid:173)
`ally; and a second joining member that joins the fan cover
`with the shield cover.
`According to an exemplary embodiment of the present
`invention, the second combining part further comprises a
`second vibration absorption member that is disposed between
`a plurality of second supports and absorbs vibration gener-
`40 ated from the cooling fan.
`According to an exemplary embodiment of the present
`invention, each of the first support and the second support is
`provided plural in number.
`According to an exemplary embodiment of the present
`45 invention, each of the first joining member and the second
`joining member comprises a screw.
`The foregoing and/or other aspects of the present invention
`can be achieved by providing a display apparatus comprising:
`a front casing in which an opening part is formed; a liquid
`50 crystal display panel that is supported by the front casing so
`that an image can be displayed through the opening part; a
`backlight unit that is provided behind the liquid crystal dis(cid:173)
`play panel and has a light source that emits light, the light
`source comprising light emitting diodes (LEDs); a circuit
`55 board that is combined to the backlight unit and processes an
`inputted video signal; a power supply that supplies power to
`the liquid crystal display panel, the backlight unit and the
`circuit board; a shield cover that is provided behind the back(cid:173)
`light unit and the circuit board and covers the backlight unit
`60 and the circuit board; a cooling fan unit that is combined with
`the shield cover and supplies cooling air to the backlight unit;
`and a rear casing that is combined with the front casing to
`form an external appearance of a rear region of the display
`apparatus.
`According to an exemplary embodiment of the present
`invention, the display apparatus further comprises a control(cid:173)
`ler that detects a rotation speed of the cooling fan unit and
`
`1. Field oflnvention
`Apparatuses consistent with the present invention relate to
`a cooling fan unit and a display apparatus having the same
`and, more particularly, to a cooling fan unit with improved
`assembly structure and a display apparatus having the same.
`2. Description of the Related Art
`Generally, a TV or a computer monitor is collectively
`called a display apparatus, which includes a liquid crystal
`display panel which forms a screen, a backlight unit located
`behind the liquid crystal display panel, a display main body
`having a casing which supports the liquid crystal display 25
`panel, and a stand which supports the display main body.
`The liquid crystal display panel generally forms a screen
`using a liquid crystal display (LCD), a plasma display panel
`(PDP), or the like.
`The backlight unit, which is located behind the liquid crys(cid:173)
`tal display panel, irradiates light to the liquid crystal display
`panel. In recent years, the backlight unit using light emitting
`diodes (LEDs) as a light source has been under development.
`However, in such a related art backlight unit, if heat gen(cid:173)
`erated from the LEDs is not emitted fast, the ambient tern- 35
`perature increases to thereby affect peripheral systems.
`Accordingly, there may be a need to emit the heat gener(cid:173)
`ated from the LEDs efficiently. It is desirable to reduce any
`noises and vibrations that may be transferred to other parts,
`the noises and vibrations arising from a cooling fan which is
`a means to dissipate heat efficiently.
`
`SUMMARY OF THE INVENTION
`
`Accordingly, it is an aspect of the present invention to
`provide a cooling fan unit with improved cooling efficiency
`by efficiently cooling heat generated from a backlight unit,
`and a display apparatus having the same.
`It is another aspect of the present invention to provide a
`cooling fan unit which can reduce the noise and vibration
`generated from a cooling fan to be delivered to other parts.
`Additional aspects of the present invention will be set forth
`in part in the description which follows and, in part, will be
`apparent from the description, or may be learned by practice
`of the present invention.
`The foregoing and/or other aspects of the present invention
`can be achieved by providing a display apparatus having a
`casing in which an opening part is formed, comprising: a
`liquid crystal display panel that is supported by the casing so
`that an image can be displayed through an opening part; a
`backlight unit that is provided behind the liquid crystal dis(cid:173)
`play panel and has a light source that emits light; a shield
`cover that is provided behind the backlight unit and is sup(cid:173)
`ported by at least one of the backlight unit and the casing; and 65
`a cooling fan unit that is combined with the shield cover and
`supplies cooling air to the backlight unit.
`
`SEC et al. v. MRI
`SEC Exhibit 1005.008
`IPR 2023-00199
`
`

`

`US 7,800,706 B2
`
`3
`controls the backlight unit to lower luminance of an image
`displayed on the liquid crystal display panel when the rotation
`speed decreases below a predetermined reference speed.
`According to an exemplary embodiment of the present
`invention, the shield cover is provided with a fan support that 5
`supports the cooling fan unit, the fan support being distanced
`from the rear casing and being formed at a central lower
`portion adjacent to the backlight unit and the circuit board.
`According to an exemplary embodiment of the present
`invention, the shield cover and the rear casing are provided 10
`with a plurality of air slits through which the air generated by
`the cooling fan unit comes in and out.
`According to an exemplary embodiment of the present
`invention, the cooling fan unit comprises a cooling fan that
`generates cooling air, and a fan cover that has one side com- 15
`bined with the cooling fan and the other side combined with
`the fan support, and wherein a vibration absorption member
`that absorbs vibration generated from the cooling fan is dis(cid:173)
`posed between the cooling fan and the fan cover and/or
`between the fan cover and the fan support.
`The foregoing and/or other aspects of the present invention
`can be achieved by providing a cooling fan unit that cools a
`backlight unit of a display apparatus comprising a casing, the
`backlight unit that is supported by the casing and comprises
`light emitting diodes (LEDs), and a shield cover that is pro- 25
`vided behind the backlight unit, comprising: a cooling fan;
`and a fan cover that has one side provided with a plurality of
`first combining parts combined with the cooling fan and the
`other side provided with a plurality of second combining parts
`combined with the shield cover.
`According to an exemplary embodiment of the present
`invention, at least one of the first combining parts and the
`second combining parts is provided with a vibration absorp(cid:173)
`tion member that absorbs vibration generated from the cool(cid:173)
`ing fan.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`The above and/or other aspects of the present invention will
`become apparent and more readily appreciated from the fol(cid:173)
`lowing description of exemplary embodiments, taken in con(cid:173)
`junction with the accompanying drawings, in which:
`FIG. 1 is a perspective view of a display apparatus accord(cid:173)
`ing to an exemplary embodiment of the present invention;
`FIG. 2 is an exploded perspective view of the display
`apparatus of FIG. 1;
`FIG. 3 is an exploded perspective view of a cooling fan
`unit;
`FIG. 4 is a partial perspective view of a mounted cooling
`fan unit;
`FIG. 5 is a schematic view of a cooling system; and
`FIG. 6 is a control block diagram of the display apparatus
`according to an exemplary embodiment of the present inven(cid:173)
`tion.
`
`DETAILED DESCRIPTION OF EXEMPLARY
`EMBODIMENTS OF THE INVENTION
`
`Reference will now be made in detail to exemplary
`embodiments of the present invention, examples of which are
`illustrated in the accompanying drawings, wherein like ref(cid:173)
`erence numerals refer to like elements throughout. The exem(cid:173)
`plary embodiments are described below so as to explain the
`present invention by referring to the figures.
`Although a display apparatus may generally comprise a
`TV or a computer monitor, the TV will be explained as one of
`the exemplary embodiments of the present invention herein(cid:173)
`after.
`
`4
`As shown in FIGS. 1 to 6, a display apparatus 100 accord(cid:173)
`ing to an exemplary embodiment of the present invention
`generally comprises a display body 103 and a stand 105 that
`supports the display body 103. The display body 103 com(cid:173)
`prises a liquid crystal display panel 120, a backlight unit 130,
`a shield cover 140, and a cooling fan unit 200. The display
`body 103 further comprises a controller 260 that controls the
`backlight unit 130. The display apparatus 100 further com(cid:173)
`prises a casing 110 that accommodates and supports the liq(cid:173)
`uid crystal display panel 120 and the backlight unit 130 to
`form an external shape, and comprises a front casing 111 and
`a rear casing 115.
`The front casing 111 comprises an opening part 113 and
`supports the liquid crystal display panel 120 on which an
`image is displayed.
`The rear casing 115 is provided in the lateral and rear side
`of the liquid crystal display panel 120 and is combined with
`the front casing 111. The rear casing 115 is preferably, but not
`necessarily, combined with the front casing 111 by means of
`20 first screws 119. As an alternative, the rear casing 115 may be
`combined with the front casing 111 by means of combiners
`known in the art, such as snaps or hooks. The rear casing 115
`has a plurality of air slits 117 through which air produced by
`a cooling fan 210 comes in and out. The rear casing 115 may
`be made of aluminum having a high heat conductivity.
`The liquid crystal display panel 120 forms an image and
`displays the formed image through the opening part 113. The
`liquid crystal display panel 120 has a rectangular plate shape.
`The liquid crystal display panel 120 comprises a liquid crystal
`30 driver (not shown) that drives the liquid crystal display panel
`120 to form the image, and a power supply 250 supplies
`power to the liquid crystal driver.
`The backlight unit 130 comprises a plurality oflight emit(cid:173)
`ting diodes (LEDs) as a light source 131 (see FIG. 5) that
`35 generates light. The backlight unit 130 may further comprise
`a diffusing sheet (not shown) that is provided above the LEDs
`in order to diffuse light emitted from the LEDs, an optical
`sheet (not shown), or other known elements in the art. A
`circuit board 133 that applies or controls power to the light
`40 source 131 and so on is combined to the rear side of the
`backlight unit 130 and is connected to the controller 260. The
`circuit board 133 may be combined to a casing (not shown) of
`the backlight unit 130 by means of second screws 135. The
`light source 131 of the backlight unit 130 is widely arranged
`45 on a plane of the backlight unit 130 and generates heat of high
`temperature when the light source 131 emits light. If internal
`temperature of the display apparatus 100 exceeds a predeter(cid:173)
`mined temperature due to heat generated from the light
`source 131 and the circuit board 133, the backlight unit 130
`50 and so on may malfunction. Accordingly, there is a need to
`dissipate the heat quickly.
`The shield cover 140, which is provided in the rear side of
`the backlight unit 130, is supported by at least one of the
`backlight unit 130 and the casing 110, with a space formed
`55 between the shield cover 140 and the backlight unit 130. The
`shield cover 140 may be made of a metal material to shield
`against an electromagnetic wave generated from the back(cid:173)
`light unit 130 and the circuit board 133. The shield cover 140
`comprises a fan support 141. The shield cover 140 may have
`60 a plurality ofair slits 117' through which flowing air produced
`by the cooling fan 210 comes in and out. The shield cover 140
`may be formed in diverse shapes such that the flowing air
`produced by the cooling fan 210 can be efficiently guided.
`The fan support 141 supports the cooling fan unit 200. The
`65 fan support 141 is spaced from the rear casing 115 and is
`formed through the shield cover 140 at a position which is
`adjacent to the backlight unit 13 0. The fan support 141 may be
`
`SEC et al. v. MRI
`SEC Exhibit 1005.009
`IPR 2023-00199
`
`

`

`US 7,800,706 B2
`
`5
`formed at a central lower portion of the shield cover 140 such
`that external air flows through the rear casing 115 and the
`shield cover 140 from a lower side to an upper side of the
`backlight unit 130. The fan support 141 may be disposed in
`different positions of the shield cover 140 in consideration of 5
`arrangement of the circuit board 133, if necessary.
`Accordingly, the cooling fan 210 may be provided adjacent
`to the light source 131 and the circuit board 133 which are
`heat generating parts of the backlight unit 130. Thus, the
`cooling air generated by the cooling fan 210 contacts the light 10
`source 131 that is widely arranged on the rear side of the
`backlight unit 130 while the cooling air flows through a space
`among the backlight unit 130, the circuit board 133 and the
`shield cover 140. This allows the widely arranged light source
`131 to be cooled efficiently.
`The cooling fan unit 200 is combined to the shield cover
`140 to cool the heat generating parts such as the light source
`131 and the circuit board 133 of the backlight unit 130. As
`best seen in FIGS. 3 and 4, the cooling fan unit 200 comprises
`the cooling fan 210 and a fan cover 220. The cooling fan unit
`200 further comprises first and second vibration absorption
`members 235 and 245 that absorb vibration generated by the
`cooling fan 210.
`The cooling fan 210 generates cooling air to cool the heat
`generating parts such as the light source 131 and the circuit
`board 133 of the backlight unit 130. The cooling fan 210 may
`be disposed adjacent to the heat generating parts to improve
`the cooling effect. The operation and rotation speed of the
`cooling fan 210 is controlled by the controller 260. The cool(cid:173)
`ing fan 210 may be changed to various shapes to improve the
`cooling effect. In addition, the cooling fan 210 may be pro(cid:173)
`vided plural in number in consideration of the size of the
`backlight unit 130, the capacity of the cooling fan 210, etc.
`Thus, the cooling air generated by the cooling fan 210 can
`efficiently cool the LEDs widely distributed on the plane of 35
`the backlight unit 130 and the circuit board 133 while the
`cooling air flows through a space between the shield cover
`140 and the backlight unit 130. FIGS. 2 and 5 show the
`cooling fan unit 200 placed in a lower central portion of the
`shield cover 140. As an alternative, the cooling fan may be 40
`placed in a central portion or an upper portion of the shield
`cover 140, if necessary. The cooling fan210 may draw in the
`cooling air from the outside into the heat generating parts or
`discharge the cooling air to the outside through the heat
`generating parts depending on its rotation direction.
`The fan cover 220 has one side provided with a first com(cid:173)
`bining part 230 which is combined with the cooling fan 210
`and the other side provided with a second combining part 240
`which is combined with the shield cover 140. The fan cover
`220 is preferably, but not necessarily, made of a plastic mate(cid:173)
`rial strong enough to support the cooling fan 210, but may be
`made of diverse materials including a metal material. The fan
`cover 220 may comprise a guide member (not shown) that
`guides the cooling air generated by the cooling fan 210 in
`various directions.
`With reference to FIG. 3, the first combining part 230
`comprises a first support 231 that supports the cooling fan 210
`and the fan cover 220 and a first joining member 233 that joins
`the cooling fan 210 and the fan cover 220.
`The first support 231 may be provided plural in number in
`order to minimize contact between the cooling fan 210 and
`the fan cover 220. In addition, the plurality of first supports
`231 may be provided at outer sides of the cooling fan 210 and
`the fan cover 220 in a substantially diagonal direction so that
`the cooling fan 210 can be stably supported. The first vibra(cid:173)
`tion absorption member 235 is disposed between the plurality
`
`6
`of first supports 231 to absorb vibration generated between
`the cooling fan 210 and the fan cover 220.
`The first joining member 233 is joined with the first support
`231 and joins the cooling fan 210 with the fan cover 220. In
`this exemplary embodiment, the first joining member 233
`comprises a screw. As an alternative, the first joining member
`233 may comprise a slidable biting member that combines the
`cooling fan 210 and the fan cover 220, and a jaw slot which is
`engaged with the biting member. In addition, for example,
`one of the first joining members 233 may be provided with a
`screw and the other thereof may be provided with a biting
`member and a jaw slot.
`The first vibration absorption member 235 is disposed
`between the first supports 231 and absorbs vibration to be
`15 delivered from the cooling fan 210 to the fan cover 220. The
`first vibration absorption 235 may be provided in a size cor(cid:173)
`responding to an area contacting the first supports 231. The
`first vibration absorption member 235 is preferably, but not
`necessarily, made of a material such as nonwoven fabric, but
`20 may selectively be made of various materials including rub(cid:173)
`ber and other known materials in the art.
`With reference to FIG. 4, the second combining part 240
`comprises a second support 241 that supports the fan cover
`220 and the shield cover 140 and a second joining member
`25 243 that joins the fan cover 220 and the shield cover 140.
`The second support 241 may be provided in the plural
`number in order to minimize contact between the fan cover
`220 and the shield cover 140. The plurality of second supports
`241 may be provided at outer sides of the fan cover 220 in a
`30 substantially diagonal direction so that the fan cover 220 can
`be stably supported. The second vibration absorption member
`245 is provided between the plurality of second supports 241
`to absorb vibration generated between the fan cover 220 and
`the shield cover 140.
`The second joining member 243 is combined to the second
`support 241 and joins the fan cover 220 and the shield cover
`140. In this exemplary embodiment, the second joining mem(cid:173)
`ber 243 comprises a screw. As an alternative, the second
`joining member 243 may comprise a slidable biting member
`that combines the fan cover 220 and the shield cover 140 and
`a jaw slot which is engaged with the biting member. In addi-
`tion, for example, one of the second joining members 243
`may be provided with a screw and the other thereof may be
`provided with a biting member and a jaw slot.
`The second vibration absorption member 245 is joined
`between the second supports 241 and absorbs vibration to be
`delivered to the fan cover 220 and the shield cover 140. The
`second vibration absorption member 245 may be provided in
`a size corresponding to an area contacting the second sup(cid:173)
`ports 241. The second vibration absorption member 245 is
`preferably, but not necessarily, made of a material such as
`nonwoven fabric, but may be made of diverse materials
`including rubber and other known materials in the art.
`Thus, the fan cover 220 has a minimal joining portion with
`55 respect to the cooling fan 210 and the shield cover 140,
`thereby preventing noise and vibration generated by rotation
`of the cooling fan 210 from being delivered to the fan cover
`220 and the shield cover 140, thus minimizing vibration to be
`delivered from the cooling fan 210 to other members. In
`60 addition, since the first and second vibration absorption mem(cid:173)
`bers 235 and 245 are provided in the first and second com(cid:173)
`bining parts 230 and 240, vibration generated from the cool(cid:173)
`ing fan 210 can be minimized.
`The power supply 250 supplies power to the display main
`65 body 103. As shown in FIG. 2, the power supply 250 may be
`combined to the liquid crystal display panel 120, or may be
`combined to the shield cover 140, if necessary.
`
`45
`
`50
`
`SEC et al. v. MRI
`SEC Exhibit 1005.010
`IPR 2023-00199
`
`

`

`US 7,800,706 B2
`
`7
`On the other hand, as shown in FIG. 6, the display appara(cid:173)
`tus 100 according to the exemplary embodiment of the
`present invention may further comprise the power supply
`250, a storing part 261 and a user selection part 263.
`The power supply 250 supplies power to the backlight unit 5
`130 so that the LEDs can emit light, and supplies power to a
`fan driver 205 for operation of the cooling fan 210.
`The storing part 261 may store modes corresponding to
`luminance of an image displayed on the liquid crystal display
`panel 120. In this exemplary embodiment, it is assumed that 10
`the liquid crystal display panel 120 can display an image
`having the maximum luminance of 250 cd/m2
`.
`The user selection part 263 is used to receive a selection
`instruction to select luminance of the image displayed on the
`liquid crystal display panel 120 from a user. In addition to the 15
`selection instruction, the user selection part 263 may receive
`various instructions to operate the display apparatus 100, and
`may be embodied by buttons, a touch screen or the like
`provided in the liquid crystal display panel 120.
`In addition, the user selection part 263 may be embodied by 20
`a separate remote controller, a keyboard with a plurality of
`keypads, a mouse or the like.
`Based on the above-mentioned configuration, an operation
`process of the display apparatus 100 according to the exem(cid:173)
`plary embodiment will be hereinafter described with refer- 25
`ence to FIGS. 5 and 6.
`To begin with, an assembly procedure of the cooling fan
`unit 200 is described.
`First, the cooling fan 210 and the fan cover 220 are dis(cid:173)
`posed to correspond to the first support 231 of the cooling fan
`210 and the fan cover 220. At this time, the first vibration
`absorption member 235 is inserted between contact surfaces
`of the first support 231, if necessary. The cooling fan 210 is
`assembled with the fan cover 220 by means of the first joining
`member 233.
`Next, the fan cover 220 and the shield cover 140 are dis(cid:173)
`posed so that the second support 241 of the fan cover 220 and
`the shield cover 140 are mated. At this time, the second
`vibration absorption member 245 is inserted between contact
`surfaces of the second support 241, if necessary. The fan 40
`cover 220 is combined with the shield cover 140 by means of
`the second joining member 243. The shield cover 140
`assembled with the liquid crystal display panel 120, the back(cid:173)
`light unit 130 and the shield cover 140 are combined with the
`casing 110 to configure the display main body 103. Finally, 45
`the stand 105 is combined to the display main body 103 to
`complete the display apparatus 100.
`Next, the completed display apparatus 100 is powered on.
`When the backlight unit 130 is supplied with power from
`the power supply 250, the cooling fan 210 of the cooling fan 50
`unit 200 combined with the shield cover 140 begins to rotate
`under control of the controller 260.
`Air drawn in (in a 'X' direction shown in FIG. 2) through
`the air slits 117 of the rear casing 115 from the outside by the
`rotation of the cooling fan 210 flows through the heat gener(cid:173)
`ating parts such as the light source 131 and the circuit board
`133 of the backlight unit 130. The air which flows through the
`heat generating parts is discharged to the outside (in a 'Y' or
`'Z' direction shown in FIG. 2) through the plurality of air slits
`117' of the shield cover 140 and the plurality of air slits 117 of
`the rear casing 115 so that heat generated from the heat
`generating parts is emitted. The intake and discharge direc(cid:173)
`tions of the air through the cooling fan 210 may be changed in
`various ways according to the arrangement of the heat gen(cid:173)
`erating parts, the number of cooling fans 210, etc. With this 65
`course, the cooling air evenly contacts the plane of the back(cid:173)
`light unit 130 while flowing in a wide area of the backlight
`
`8
`unit 130, thereby cooling the light source 131 and the circuit
`board 133, which are widely arranged in the backlight unit
`130. At this time, the fan driver 205 drives the cooling fan 210
`at a predetermined rotation speed under control of the con(cid:173)
`troller 260.
`The controller 260 receives a taco signal outputted from the
`cooling fan 250 and detects the rotation speed of the cooling
`fan 250 based on the taco signal. When the rotation speed of
`the cooling fan 250 decreases below a reference speed, the
`controller 260 controls the backlight unit 130 to lower lumi(cid:173)
`nance of an image displayed on the liquid crystal display
`panel 120. For example, when the rotation speed of the cool(cid:173)
`ing fan 250 decreases below 60 Hz, the controller 260 con(cid:173)
`trols the backlight unit 130 to lower luminance oflight emit(cid:173)
`ted from the LEDs.
`The cooling fan 250 of the display apparatus according to
`the exemplary embodiment may be provided to have a struc(cid:173)
`ture in which external air is discharged to the outside through
`the cooling fan 250 via the heat generating parts in contrast to
`the above-described exemplary embodiment.
`As apparent from the above description, the present inven(cid:173)
`tion provides a cooling fan unit with improved cooling effi(cid:173)
`ciency by efficiently cooling heat generating parts of a back(cid:173)
`light unit. In addition, the present invention provides a
`cooling fan unit which is capable of preventing noise and
`vibration generated from a cooling fan from being delivered
`to other parts.
`Although a few exemplary embodiments of the present
`invention have been shown and described, it will be appreci-
`30 ated by those skilled in the art that changes may be made in
`these exemplary embodiments without departing from the
`principles and spirit of the invention, the scope of which is
`defined in the appended claims and their equivalents.
`What is claimed is:
`1. A display appara