as) United States
`a2) Patent Application Publication co) Pub. No.: US 2009/0054112 Al
`
` CYBARTetal. (43) Pub. Date: Feb. 26, 2009
`
`
`US 20090054112A1
`
`(54) DISPLAY FOR PORTABLE ELECTRONIC
`DEVICE
`
`(22)
`
`Filed:
`
`Aug. 24, 2007
`
`(75)
`
`Inventors:
`
`ADAM CYBART, MCHENRY, IL
`(US); ROGER W. ADY,
`CHICAGO,IL (US):
`CHRISTOPHERA. ARNHOLT,
`HIGHLANDPARK,IL (US);
`DAVID B. CRANFILL,
`ANTIOCH,IL (US); WILLIAM R.
`GROVES, NAPERVILLE, IL (US)
`
`Correspondence Address:
`MOTOROLA INC
`600 NORTH US HIGHWAY45, W4 - 39Q
`LIBERTYVILLE, IL 60048-5343 (US)
`
`(73) Assignee:
`
`MOTOROLA,INC.,
`LIBERTYVILLE,IL (US)
`
`(21) Appl. No.:
`
`11/844,524
`
`Publication Classification
`
`(51)
`
`Int. Cl.
`(2006.01)
`HO4M 1/00
`(52) US. Ch. oe cece eeeeneesesseneescneceeseens 455/575.3
`
`(57)
`
`ABSTRACT
`
`A portable electronic device (200) including a housing having
`a movable housingportion in the form ofaflip, rotating blade
`or slider portion. A controller is electrically coupled to a
`plurality of light shutter portions in the movable housing
`portion, wherein the controller independently configuring
`each light shutter portion betweenfirst and secondlighttrans-
`mitting states based upon input from a sensor, an application
`or based upon the configuration of the housing. The shutter
`portions may obscure or reveal an underlying display or
`inputs.
`
`1R3 112 125
`
`
`122 124
` eel
`SSSbe
`
`
`
`
`
`
`
`120
`
`110
`
`118
`
`1
`
`APPLE 1014
`
`APPLE 1014
`
`1
`
`

`

`ent Application Publication
`
`Feb. 26, 2009 Sheet 1 of 5
`
`WN
`
`112 SASS
`
`N
`ZN
`
`116
`
`SAN
`
`114 WSCC
`
`110
`
`NeSeethee
`
`WXsw
`
`2
`
`

`

`Patent Application Publication
`
`Feb. 26, 2009 Sheet 2 of 5
`
`US 2009/0054112 Al
`
`LIGHT
`SHUTTERS
`
`212
`
`220
`
`DISPLAY
`
`210
`
`200
`
`216
`
`218
`
`SECOND UI
`
`CONTROLLER
`
`FIRST UI
`
`214
`
`222
`
`224
`
`226
`
`NIL“tr
`
`saa
`
`FIG. 2
`
`122 124
`
`12
`
`
`
`
`
`
`
`125
`123
`
`
`
`
`NA>>>yy ESSSESSDDDDDaDEDaadDaebahabbdaadbbdabebdbbshdaebsbbebeXR
`NWN AAASAASAAS SannnnnSSSSAAAMAAS NS
`
`
`116
`
`
`
`FIG. 3
`
`3
`
`

`

`Patent Application Publication
`
`Feb. 26, 2009
`
`Sheet 3 of 5
`
`US 2009/0054112 Al
`
`
`IOAYVv_X6HN\\eu
`9Did
`YA‘RR NLLLLLLY
`WN
`$Dl
`
`a=
`
`LTaaaaaaaaaa
`N
`Y
`
`Le
`x
`
`i,
`Y
`
`LTLTaaaaaaA
`LLL
`
`LL
`
`wMG.GG
`WU
`BOA
`
`LE
`
`Lilie
`
` NVuniMG.GG
`
`WLLL
`
`4
`
`
`
`
`
`
`

`

`
`
`Kibiielelite
`Y
`
`NYYeAXAnW:»”’W
`
`CW \\
`LLLL{LLILLL
`\NZ
`LDIAKXGq
`
`5
`
`
`
`

`

`YXNARAXGNpsSSSSS
`
`NMOXXQ@
`[IlOlaOLDlf
`
`SXSSsc—‘°sesoa
`
`N\
`
`Yj
`
`v
`
`j
`
`SAQA
`
`VAS
`
`LZ
`
`6
`
`
`

`

`US 2009/0054112 Al
`
`Feb. 26, 2009
`
`DISPLAY FOR PORTABLE ELECTRONIC
`DEVICE
`
`FIELD OF THE DISCLOSURE
`
`[0001] The present disclosure relates generally to display
`technology, and more specifically to display interfaces for
`electronic devices, for example, for wireless communication
`handsets.
`
`BACKGROUND
`
`[0002] Mobile telephones including tablet devices and per-
`sonal digital assistants (PDAs) amongother devices having a
`movable housing portion, for example, a flip, that covers a
`display are known generally. In some devices, the movable
`housing portion is clear or opaque and functions at least
`partially to protect the display when closed. Flip type hous-
`ings may also form an ear-piece containing an audio speaker
`for use whentheflip is opened.
`[0003] U.S. Pat. No. 6,662,244 to Takahashi entitled
`“Information Terminal” discloses a portable telephone hav-
`ing first and second hinged housing portions wherein thefirst
`housing portion has a display section and the second housing
`portion has an input/display section comprising a touch panel
`bonded to a transmission type LCD display. In the opened
`state, the input/display section of the second housing portion
`functions as a display and input device. In the closedstate, the
`input/display section of the second housing portion overlaps
`the display section ofthefirst housing portion. In the closed
`state, the input section ofthe second housing portion becomes
`inoperable and the LCD display becomestransparentto per-
`mit observation of the display section of the first housing
`portion.
`[0004] The various aspects, features and advantages of the
`disclosure will become more fully apparent to those having
`ordinary skill in the art upon careful consideration of the
`following Detailed Description thereof with the accompany-
`ing drawings described below. The drawings may have been
`simplified for clarity and are not necessarily drawnto scale.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`FIG.1 illustrates a portable electronic device having
`[0005]
`a movable housing portion.
`[0006] FIG.2isa schematic block diagram of an electronic
`device.
`
`FIG. 3 is a sectional view of a portable electronic
`[0007]
`device having hinged housing portions.
`[0008]
`FIG. 4isaplan view of an electronic device wherein
`a light shutter portion is in a blockingstate.
`[0009] FIG.5isaplan view of an electronic device wherein
`a light shutter portion is in a transmitting state.
`[0010]
`FIG. 6is a plan view of an electronic device wherein
`alight shutter portion is in a partially blocking/partially trans-
`mitting state.
`[0011] FIG.7isaplan view of an electronic device wherein
`alight shutter portionis in anotherpartially blocking/partially
`transmitting state.
`[0012] FIG.8isaplan view of an electronic device wherein
`alight shutter portionis in anotherpartially blocking/partially
`transmitting state.
`[0013] FIG.9isaplan view of an electronic device wherein
`a light shutter portion is in yet another partially blocking/
`partially transmitting state.
`
`FIG. 10 is a plan view of an electronic device
`[0014]
`wherein a light shutter portion is in a blockingstate.
`[0015]
`FIG. 11 is a plan view of an electronic device
`wherein a light shutter portion is in a transparentstate.
`[0016]
`FIG. 12 is a plan view of an electronic device
`wherein a light shutter portion is in a partially blocking/
`partially transmitting state.
`
`DETAILED DESCRIPTION
`
`In FIG. 1, the portable electronic device 100 com-
`[0017]
`prises a housing 110 having a movable housing portion 112
`pivotally coupled thereto by a hinge 114. The moving portion
`112 is in the exemplary form ofa flip and is positionable
`betweenfirst and second configurations. In one configuration,
`the flip is openedrelative to the housingas illustrated in FIG.
`1. In the other configuration, illustrated in FIG.3, the flip 112
`is closedrelative to the housing 110. In another embodiment,
`the movable housing portion is a sliding memberthatslides
`relative to the housing betweenthefirst and second configu-
`rations. In yet another embodiment, the movable housing
`portion is a blade thatrotates relative to the housing between
`the first and second configurations. In these and other devices
`having a movable housing portion, the movable housing por-
`tion mayalso be configurable in intermediate configurations
`between the opened and closed positions. In one embodi-
`ment, the portable electronic device is a wireless communi-
`cation device like a cell phone. In other embodiments, the
`device is a PDA, or a portable media device or some other
`handheld electronic device.
`
`FIG. 2 illustrates a schematic block diagram of an
`[0018]
`exemplary device 200 comprising a controller 210 electri-
`cally coupled to a light shutter panel 211 comprising two or
`more light shutter portions, which may be configured in an
`array or in someother arrangement. The light shutter portions
`may comprise a polymerdispersed liquid crystal (PDLC), or
`acholesteric liquid crystal, or a twisted-nematic liquid crystal
`(TNLC)or someother material that changes states in a man-
`ner that controls the transmission or reflection of incident
`light. In one embodiment, the controller is configured to
`independently control each of the plurality of light shutter
`portions between first and second light transmitting states
`wherein one state permits the transmission of more light
`through the panel than the other state. More generally, the
`shutter portions may also have multiple states. The controller
`may be embodied as a digital controller programmed by
`software or firmware stored in a memory device. In one
`application,a first state permits light transmission through the
`movable housing portion in which the shutter is disposed and
`a secondstate obstructs the transmission oflight through the
`movable housing portion.
`[0019]
`In FIG.2, the device 200 includesa shutter control-
`ling sensor 214 electrically coupled to the controller 210
`wherein the controller is configured to cause one or more
`shutter portions to changestates in response to a signal from
`the sensor. In one embodiment, the shutter controlling sensor
`is selected from a group of sensors comprising a proximity
`sensor, a tactile-based sensor, and an accelerometer that pro-
`vides an output based on an orientation of the portable elec-
`tronic device. The controller mayalso activate other portions
`of the device in response to changes detected by the sensor.
`For example, the controller may enable a primary or second-
`ary display and/or transition the device from a relatively low
`powerstate to a more active state in responseto the detection
`of a changing condition by the sensor.
`
`7
`
`

`

`US 2009/0054112 Al
`
`Feb. 26, 2009
`
`Inanother embodiment, the controller causes one or
`[0020]
`more shutter portions to changestates based on an application
`running on the device. In FIG.2, the application is run on an
`application processor 222 electrically coupledto the control-
`ler. In wireless communication applications, the controller
`may control the state of the shutter portions based upon an
`output from a call processor. Such an output may be generated
`for example, uponreceipt ofa call. In other embodiments, the
`state of the shutter portions depends upon both the configu-
`ration ofthe housing and on one or more applications running
`on the device. The controller may also configure the state of
`the light shutter portions based upon the configuration of the
`movable housing portion. In one use case, for example, the
`shutter portions are configured when the movable housing
`portion is opened or closed. More generally, the controller
`may configure thestate of the shutter portions based upon the
`configuration of some other mechanicalorelectrical configu-
`ration of the device. A few exemplary use cases are discussed
`further below.
`
`[0021] The device 200 of FIG.2 also includesa display 216
`and a first user interface 218, for example, input keys and/or
`a navigation pad. A seconduserinterface 220 may be embod-
`ied as a touch screen or as someother input. For example, the
`display 216 may have a touch screen associated therewith.
`The device also includes an application processor 222. In
`some embodiments, the application processor is integrated
`with the controller. In applications where the electronic
`device is capable ofwireless communications, the device may
`also include one or more wireless transmitters and/or receiv-
`
`ers 224. Exemplary transceivers include cellular, LAN,
`WAN,Bluetooth, and/or IrDA transceivers among others.
`The device may also comprise a navigation receiver, for
`example a GPSreceiver. Navigation and routing applications
`used in conjunction with the navigation receiver may also be
`a basis for configuring the shutter portions.
`[0022]
`In FIGS. 1 and 3, a shutter panel 116 comprising
`shutter portions is disposed on the movable housing portion
`112. The shutter panel shown occupies a substantial portion
`of the moving housingportion, though in other embodiments
`the shutter panel may occupyless area. In other embodiments,
`there may be multiple shutter panels. In FIG. 1, the housing
`portion includes a display 118 and input keys and/or a navi-
`gation pad 120. FIG.3 illustrates touch sensors 122, 124 on
`opposite sides of the shutter panel. In other embodiments, the
`touch sensor maybe located on only one side ofthe panel. The
`touch sensors accommodate user input when the moving
`housing portion is opened or closed. In some embodiments,
`the touch sensor may beactivated and deactivated based on
`whether the moving housing portion is opened or closed
`based on input from a sensorthat detects the configuration of
`the housing. In FIG.3, for example, the touch sensor 122 may
`be enabled and the touch sensor 124 disabled when the mov-
`able housing portion 112 is closed. When the movable hous-
`ing portion is opened, the touch sensor 122 may be disabled
`and the touch sensor 124 enabled.
`
`In some embodiments, illustrated in FIG. 3, there
`[0023]
`mayalso be a protective or decorative film or lens 123, 125
`disposed on each ofthe touch sensors or on thelight shutter in
`the absenceof touch sensors. In one embodiment, an optical
`film limits the angle at which light may be transmitted
`through the shutter panel. Such a film reduces the viewing
`angle through the light shutters, wherein the viewing angle is
`measuredrelative to a reference that is perpendicular to the
`plane of the shutter panel.
`
`In one embodiment, the movable housing portion
`[0024]
`coversat least a portion of the housingin a least one configu-
`ration ofthe movable housing portion andat least a portion of
`the housing is concealed by one or moreof the shutter por-
`tions configured in the light obstructing state when the mov-
`able housing portion covers the housing or a portion thereof.
`In FIG. 1, for example, the movable housing portion 112 in
`the opened configuration exposes the display 118 and the key
`pad 120. In FIG.4, the movable housing portion 112 is in the
`closed configuration wherein the display and the key pad are
`concealed whenthe shutter portions of the shutter panel 116
`are in the light obstructing state.
`[0025] The housing or a portion thereof may also be
`revealed through at least one of the shutter portions config-
`ured in a light transmitting state when the movable housing
`portion covers the housingor a portion thereof. In FIG. 5, the
`movable housing portion 112 is in the closed configuration
`wherein the display and the key pad are exposed when the
`shutter portions of the shutter panel 116 are in the light trans-
`mitting state. Configuring all of the shutter portions in the
`light obstructing states would conceal the underlying display
`and keypad asillustrated in FIG.3. In FIG.6, the shutter panel
`is selectively configured so that only the display 118 is
`exposed by the light transmitting shutter portions when the
`moving housing portion is closed. In FIG. 6, the key pad is
`concealed by shutter portions 119 configured in a light
`obstructing state. In FIG. 7, the shutter panel is selectively
`configuredso that only a portion 121 ofthe display is exposed
`by the light transmitting shutter portions when the moving
`housing portion is closed. In FIG. 7, the key pad and other
`portions of the display are concealed by shutter portions 126
`configuredin a light obstructing state. The exposedportion of
`the display may be used to display a dialed number or the
`numberof an incomingcaller. In FIG. 8, the shutter panelis
`selectively configuredso that only the key pad 120 is exposed
`by the light transmitting shutter portions when the moving
`housingportion is closed. In FIG.8, the display is concealed
`by shutter portions 128 configured in a light obstructing state.
`[0026]
`In one usecase, the shutter portions are configured
`to obstruct the transmission oflight such that the underlying
`display and key pad are concealed illustrated in FIG. 4. There-
`after, in response to an event, the shutter portions are config-
`ured to permit the transmission oflight thereby revealing the
`underlying display or portion thereof and/or revealing the
`underlying key pad asillustrated in FIGS. 5-9. The event
`could be the detection of changing condition by the sensor
`214 of FIG. 2 as discussed above. In wireless telephone
`applications, for example, an incoming call could prompt the
`configuration of shutter portions to permit the transmission of
`light to reveal the callers name, numberorother indicia dis-
`played on the underlying display. This information could be
`displayed on the exposeddisplay portions illustrated in FIGS.
`5-7. In FIGS. 5 and 6, the underlying display could also
`display video. In FIG. 7, the underlying display could also
`display the multimedia tracks currently playing or tracks
`queued for playing.
`[0027]
`In another embodiment, the movable housing por-
`tion includes a user interface, for example, the touch screen
`122 and/or 124 illustrated in FIG.3. In this embodiment, the
`controller is capable of configuring the plurality of light shut-
`ter portions to reveal a portion of the display on the housing
`when the movable housing portion 1s in the closed configu-
`ration. The display may include indicia for the user interface
`on the movable housing portion. The indicia may be in the
`
`8
`
`

`

`US 2009/0054112 Al
`
`Feb. 26, 2009
`
`form of application icons or other information, for example,
`an electronic phone booklisting, audio and videofiles, docu-
`ments, etc. In embodiments with a touch screen on the mov-
`able housing portion, when the shutter portions of the mov-
`able housing portion are configured to the revealthe display,
`the controller may configure the device to enable the user to
`interact with the display interface using the touch screen, for
`example, to start applications, select documents andfiles, etc.
`Thusthe user could perform function using the touch screen
`that would other wise be performeddirectly on the underlying
`display.
`In another embodiment where the movable housing
`[0028]
`portion includes a user interface, for example, the touch
`screen 122 illustrated in FIG. 3, the controller is capable of
`configuring the plurality of light shutter portions to conceal
`one or moreportions of the display on the housing when the
`movable housing portion is in the closed configuration. In
`FIGS. 6 and 7, for example, the movable housing portion
`covers the key padbyvirtue ofthe configuration ofthe shutter
`portions. In FIG.6, all of the underlying display is visible but
`the key pad is not. In FIG. 7, only a portion of the underlying
`keypadis visible. More generally, however, the key pad may
`be obscured by a portion ofthe movable housingportion other
`thanthe shutter portions. Generally, the controller configures
`the userinterface, e.g., the touchpad, of the movable housing
`portion to perform the function performed by the visibly
`obscured key pad. In one embodiment, the underlying display
`may provide indicia aligned with corresponding portions of
`the touch screen interface on the movable housing portion,
`wherein inputs at the touch screen execute the same functions
`providedby the userinterfacethat is concealed by the moving
`housing portion. FIG. 9 illustrates the light shutter portions
`132, 134 and 136 configuredin a light transmitting state that
`may expose portions of the underlying display panel. As
`indicated, the underlying display may includeindicia or icons
`indicative of functions performed by depressing correspond-
`ing portions of the touch screen aligned with the icons. As
`suggested above,the functions performedby the touch screen
`inputs on the movable housing portion may be the sameas the
`function performed by the key pad covered by the movable
`housing portion. Thus upon closing the movable housing
`portion, the function performed by the concealed key padis
`translated to the touch screen.
`
`capture application is running and when the movable housing
`portion is opened, the controller configures the plurality of
`light shutter portions to display a view finder, e.g., a cross-
`hair, that is aligned with an optical path of the lens, wherein
`the user may focus the lens on an object for image capture
`using the view finder.
`[0031] While the present disclosure and the best modes
`thereof have been described in a mannerestablishing posses-
`sion and enabling those of ordinary skill to make and use the
`same, it will be understood and appreciated that there are
`equivalents to the exemplary embodiments disclosed herein
`and that modifications and variations may be made thereto
`without departing from the scope andspirit of the inventions,
`which are to be limited not by the exemplary embodiments
`but by the appended claims.
`
`Whatis claimedis:
`
`1.A portable electronic device comprising:
`a housing;
`a movable housing portion positionable betweenfirst and
`second configurations;
`the movable housing portion including a plurality of light
`shutter portions,
`a controller electrically coupled to the plurality of light
`shutter portions,
`the controller independently configuring each light shutter
`portion betweenfirst and secondstates,
`wherein the first state permits light transmission through
`the movable housing portion and the second state
`obstructs the transmission oflight through the movable
`housingportion.
`2. The device of claim 1,
`a shutter controlling sensorelectrically coupledto the con-
`troller, the controller causing at least some ofthe shutter
`portionsto changestates in responseto a signal from the
`shutter controlling sensor,
`the shutter controlling sensor selected from a group com-
`prising: a proximity sensor, a tactile-based sensor, and
`an accelerometerdetecting an orientationofthe portable
`electronic device.
`
`3. The device of claim 1, the controller causing at least
`someofthe shutter portions to changestates in response to a
`signal from an application running on the device.
`[0029] Generally either side of the movable housing por-
`4. The device of claim 1,
`tion may be configured to display an imageor to reflect or
`the movable housing portion coversat least a portion ofthe
`diffuse light when the movable housing portion is opened or
`housing in a least one configuration,
`closed. When the moving housing portion is closed and the
`at least a portion of the housing is concealedbyat least one
`shutter panelis transparent as in FIG.5or 6, an image may be
`ofthe shutter portions configuredin the light obstructing
`provided by the display. The reflection or diffusion of light
`state when the movable housing portion coversat least a
`may be enabled by an optical film or coating on the exposed
`portion of the housing,
`side ofthe movable housingportion.In FIG.10, the controller
`at least a portion of the housingis revealed throughat least
`configures theplurality of light shutter portions of the shutter
`one of the shutter portions configuredin the light trans-
`panel 116 in the light obstructing state when the movable
`mitting state when the movable housing portion covers
`housing portion 112 is opened. In another embodiment,illus-
`at least a portion of the housing.
`trated in FIG. 11, the controller configures the plurality of
`5. The device of claim 1,
`light shutter portions of the shutter panel 116 in the light
`transmitting state when the movable housing portion 112 is
`a user interface on the housing, the user interface selected
`opened.
`from a group comprising a display and an input key,
`the movable housing portion coversat least a portion ofthe
`In FIG. 12, the controller configures the plurality of
`[0030]
`user interface on the housing in a least one configuration,
`light shutter portions of the shutter panel 116 to display an
`image when the movable housing portion 112 is opened. In
`the controller configuring the plurality of light shutter por-
`FIG. 2, the device includes an image capture device 226
`tions to conceal and reveal select portions of the user
`including a lens focused on an image sensor communicably
`interface on the housing when the movable housing por-
`coupled to an image engine. In this use case, when the image
`tion covers the select portions of the user interface.
`
`9
`
`

`

`US 2009/0054112 Al
`
`Feb. 26, 2009
`
`6. The device of claim 5,
`the user interface on the housing includesa display and an
`input key,
`the movable housing portion coversat least a portion of the
`display and the input key,
`the controller configuring the plurality of light shutter por-
`tions to conceal the input key and to reveal at least a
`portion ofthe display.
`7. The device of claim 5,
`the user interface on the housing includesa display and an
`input key,
`the movable housing portion coversat least a portion of the
`display and the input key,
`the controller configuring the plurality of light shutter por-
`tions to reveal the input key and to conceal at least a
`portion ofthe display.
`8. The device of claim 1,
`a user interface on the movable housing portion,
`a display on the housing,
`the movable housing portion coversat least a portion of the
`display on the housing in a least one configuration,
`the controller capable of configuring the plurality of light
`shutter portions to revealat least a portion of the display
`on the housing when the movable housing portion cov-
`ers the revealed portion of the display,
`the revealed portion ofthe display on the housing includes
`indicia for the user interface on the movable housing
`portion when the movable housing portion covers the
`revealed portion ofthe display.
`9. The device of claim 1,
`a user interface on the movable housing portion, the user
`interface electrically coupled to the controller,
`a seconduserinterface on the housing,
`the movable housing portion coversat least a portion of the
`second user interface on the housing in a least one con-
`figuration,
`the controller configuring the plurality of light shutter por-
`tions to conceal at least a portion of the second user
`
`interface on the housing when the movable housing por-
`tion covers the concealed portion of the second user
`interface,
`the controller configuring the user interface to perform a
`function performed by the portion of the second user
`interface concealed.
`
`10. The device of claim 1, the controller configuring the
`state of each of the light shutter portions dependent on the
`configuration of the movable housing portion.
`11. The device of claim 10,
`the first configuration ofthe movable housing portion is an
`opened configuration and the second configuration of
`the movable housing portion is a closed configuration,
`the controller configuring the plurality of light shutter por-
`tions in the light obstructing state when the movable
`housing portion is in the opened configuration.
`12. The device of claim 10,
`the first configuration ofthe movable housing portion is an
`opened configuration and the second configuration of
`the movable housing portion is a closed configuration,
`the controller configuring the plurality of light shutter por-
`tions to display an image when the movable housing
`portion is in the opened configuration.
`13. The device of claim 1,
`an image capture device including a lens focused on an
`image sensor communicably coupled to an image
`engine,
`the controller configuring the plurality of light shutter por-
`tions to display a view finderaligned with an optical path
`of the lens when the movable housing portion is in the
`opened configuration.
`14. The device of claim 1, an opticalfilm disposed adjacent
`the plurality of light shutters on the movable housing portion,
`wherein an image viewable on the movable housingportionis
`not visible beyond a specified angle at which the imageis
`projected through the opticalfilm.
`uf
`uf
`uf
`uf
`
`uf
`
`10
`
`10
`
`