Method and apparatus to enable use of motion to associate devices
Contents
1. Motion Database 235 Motion Identifier 230 Discovery Logic 280 Target Device Identification Logic e ae 240 Secure Connection Key Generation Logic Logic 250 255 Data Exchange Pair Data Logic 270 260 Connection Logic 280 U S Patent Nov 25 2014 Sheet 3 of 7 US 8 897 704 B1 Initiate pairing 320 N Detect motions for pairing 330 Establish secure connection 340 Exchange data 350 Fig 3 U S Patent Nov 25 2014 Sheet 4 of 7 US 8 897 704 B1 eceive command to place device in pairing mode 420 Identify motions initiating pairing 430 Generate key to create secure connection 440 Device attempts connection with identified pair 445 Can cure connection b established 450 Inform user of failed connection attempt 460 Yes Exchange data amp close connection 470 480 Fig 4 U S Patent Nov 25 2014 Sheet 5 of 7 US 8 897 704 B1 510 Detect motions initiating pairing 520 i Send out discovery message 530 Any response 540 Compare motions detected Create secure connection 570 t Exchange data amp close connection w Fig 5 U S Patent Nov 25 2014 610 Detect series of motions 620 Identify device indic2. per second skew This may be used to ensure that when motions are compared the calculated absolute time when they occur is identical on both devices 0 20 40 45 55 65 4 Data exchange logic 260 exchanges data between the devices This data is obtained from Pair data 270 and any relevant data to be used for future connections is stored In one embodiment the future connection data is also stored in pair data 270 In subsequent uses of the device in one embodiment con nection logic 280 utilizes the stored data from pair data 270 to establish a connection with the other device In one embodiment this occurs automatically when the device is subsequently turned on FIG 3 is an overview flowchart of one embodiment of pairing The pairing is initiated at block 320 As noted above the pairing may be initialized by a user action At block 330 the pairing motions are detected In one embodiment if the pairing is initiated by motion blocks 320 and 330 may refer to the same motions At block 340 a secure connection is established The secure connection is established based on the motions detected In one embodiment the secure connection is an encrypted connection At block 350 data is exchanged between the devices for pairing Once devices are paired their connection can be automatically established in the future The process ends at block 360 FIG 4 is a flowchart of one embodiment of pairing The
3. this process is performed for both devices At block 440 a key is generated to create a secure connec tion In one embodiment the key is generated based on the exact motions performed by the user to initiate pairing In one embodiment the key is based on differential motion i e the relationship between various measurements rather than exact measurements This ensures that even if the two devices have not been cross calibrated the proper key is generated In one embodiment the measurement of the accelerometer orienta tion is used to perform an axis translation on both devices Along with the axis normalization and axis translation the directional acceleration and amplitude measurements will be equivalent on both devices In one embodiment using direc tion acceleration amplitude and time a coded numeric sequence will be computed and used as the key for both devices US 8 897 704 B1 5 At block 445 the device attempts to connect with the identified device to be paired In one embodiment both devices attempt to establish a connection In another embodi ment one device is the host device which has the software to establish such a connection while the other device is the client device which is more passive and receives the con nection attempt At block 450 the process determines whether a secure connection can be established If not at block 460 the user is informed of the failed connection attempt In one
4. HIPLegal LLP Judith A 63 Continuation of application No 11 855 133 filed on Szepesi Sep 13 2007 now Pat No 7 907 901 57 ABSTRACT 51 Int CI A method and apparatus to provide easier pairing based on HO4B 7 00 2006 01 motion data is described The method of associating two HO4B 5 00 2006 01 devices comprises receiving a signal to enter into pairing 52 U S Cl mode and detecting a motion indicating a pairing The USPE cnori 455 41 2 455 41 1 455 502 method further comprises establishing a secure connection 58 Field of Classification Search with another device for pairing the secure connection estab CPC H04M 2250 12 H04M 1 7253 H04W 12 00 USPC 455 41 2 41 3 41 1 425 502 13 2 See application file for complete search history 140 Fourth Device lished based on the motion and exchanging data 20 Claims 7 Drawing Sheets First Device Pe 110 di Motion Sensor 115 Server Second Device 150 120 Motion Sensor 125 U S Patent Nov 25 2014 Sheet 1 of 7 US 8 897 704 B1 Fourth Device 140 First Device 110 Motion Sensor 115 a a Server Second Device 150 120 Motion Sensor 125 Third Device 130 Motion Sensor 135 Fig 1 U S Patent Nov 25 2014 Motion Sensor 115 Fig 2 Sheet 2 of 7 US 8 897 704 B1 Pairing Logic User Interface 220 210
5. and detecting a motion indicating a pairing The method further comprises establishing a secure connection with another 20 25 30 35 40 45 50 55 60 65 2 device for pairing the secure connection established based on the motion and exchanging data for pairing BRIEF DESCRIPTION OF THE DRAWINGS The present invention is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings and in which like reference numerals refer to similar elements and in which FIG 1 is a network diagram of the devices FIG 2 is a block diagram of one embodiment of the pairing mechanism FIG 3 is an overview flowchart of one embodiment of pairing FIG 4 is a flowchart of one embodiment of pairing FIG 5 is a flowchart of one embodiment of associating the two devices FIG 6 is a flowchart of an alternative embodiment of associating the two devices FIG 7 isa block diagram of one embodiment ofa computer system which may be used with the present invention DETAILED DESCRIPTION The method and apparatus described is for enabling the association of two or more devices Associating devices or pairing them establishes a connection between the devices and shares data between them The term pairing and asso ciating are used interchangeably The process in one embodiment includes putting both devices in pairing mode then performing a motion such as shaking the devi
6. enter into the pairing mode by two or more devices the key generated based on the motion data the key used for the secure connection 7 The method of claim 1 further comprising providing the motion data to a server the server to generate the key based on the motion data for a device with limited processing capability 8 A method of associating two devices to enable an exchange of data comprising instructing a user to hold the two devices together and perform a motion with the two devices together calculating a differential motion data based on the motion the differential motion data enabling comparison of motions between two devices held at different angles and associating the devices based on the differential motion data to enable the devices to exchange data through a secure connection the connection secured based on identical keys generated by each of the two devices based on the differential motion data generated when the two devices were moved together US 8 897 704 B1 9 9 The method of claim 8 further comprising using a motion signature derived from the motion to iden tify the devices to be paired 10 The method of claim 8 further comprising establishing a secure connection for the pairing the secure connection established based on the motion 11 The method of claim 8 further comprising identifying a target device based on the motion performing a handshake with the device synchronizing cloc
7. optionally be coupled to com puter system 700 is a communication device 790 for access ing other nodes of a distributed system via a network The communication device 790 may include any of a number of commercially available networking peripheral devices such as those used for coupling to an Ethernet token ring Internet or wide area network The communication device 790 may further be a null modem connection or any other mechanism that provides connectivity between the computer system 700 and the outside world Note that any or all of the components of this system illustrated in FIG 7 and associated hardware may be used in various embodiments of the present invention It will be appreciated by those of ordinary skill in the art that any configuration of the system may be used for various purposes according to the particular implementation The control logic or software implementing the present invention can be stored in main memory 750 mass storage device 725 or other storage medium locally or remotely accessible to processor 710 It will be apparent to those of ordinary skill in the art that the system method and process described herein can be implemented as software stored in main memory 750 or read only memory 720 and executed by processor 710 This con trol logic or software may also be resident on an article of manufacture comprising a computer readable medium having computer readable program code embodied therein and being read
8. pairing of a Bluetooth headset with a phone may include the following steps The headset Put the headset into Discoverable mode usually by holding a button or sequence of buttons so that the phone can find it Refer to your headset s user manual to find out the PIN code The phone From the home screen press and hold the Home key Select the Communications Manager second option Press the Settings menu and choose Bluetooth Set tings Choose Menu gt Devices Choose Menu gt New After a few seconds the name of your headset will be displayed along with any other Bluetooth devices in range Highlight the name of the headset that you wish to pair and press the Next key Enter the PIN code found in the headset manual to bond the two devices together Press Next to pass by the renaming of the headset On the services screen ensure that the Wireless Stereo service is ticked then press Done Press Done on the next screen then Done on the Next then Done on the next Press Exit to leave the Communication Manager As can be seen this process is rather involved and requires a lot of steps including looking up codes in a handbook and working through multiple menus SUMMARY OF THE INVENTION A method and apparatus to provide easier pairing based on motion data is described The method of pairing two devices comprises receiving a signal to enter into pairing mode
9. the complexity and navigation requirements as will be described below FIG 2 is a block diagram of one embodiment of the pairing logic In one embodiment the pairing logic resides on one of the mobile devices In one embodiment only one of the devices has the pairing logic In one embodiment the pairing logic 210 may be split between the handheld device and a remote device such as a server In another embodiment both devices have a pairing logic In one embodiment one or both of the devices may include a subset of the pairing logic elements described The motion sensor 115 provides data to motion identifier 230 Motion identifier 230 identifies the motion In one embodiment the motion identifier uses a database of motions 235 to identify the meaning of each motion In one embodi ment the motions may initiate pairing In one embodiment the user may initiate pairing through user interface 220 User interface 220 may also be used to define the motions used for pairing In another embodiment the motions stored in motion database 235 are pre defined In one embodiment when the motion for pairing is identi fied by motion identifier 230 or initiated by user interface 220 the subsequent motions are passed to target device iden tification logic 240 In one embodiment the motion identifier 230 identifies the motion components and passes these iden tified motion components to target device identification logic 240 For example a moti
10. US008897704B1 az United States Patent 10 Patent No US 8 897 704 B1 Kahn et al 45 Date of Patent Nov 25 2014 54 METHOD AND APPARATUS TO ENABLE USE 56 References Cited OF MOTION TO ASSOCIATE DEVICES U S PATENT DOCUMENTS 75 Inventors Philippe Richard Kahn Santa Cruz ee CA US Arthur Kinsolving Santa 7 427 926 B2 9 2008 Sinclair etal oo 340 4 2 2 A 8 8 391 786 B2 3 2013 Hodges etal wo 455 41 2 Cruz CA US David Vogel Santa 2007 0213045 Al 9 2007 Hermansson et al Cruz CA US OTHER PUBLICATIONS 73 Assignee DP Technologies Inc Scotts Valley CA 7 US Mayrhofer R Gellersen H Shake Well Before Use Authentica tion Based on Accelerometer Data In Proc Pervasive 2007 Notice Subject to any disclaimer the term of this Springer Verlag May 2007 pp 144 161 patent is extended or adjusted under 35 Mayrhofer R Gellersen H Shake Well Before Use two imple U S C 154 b by 0 days mentations for implicit context authentication Adjunct Proc i i Ubicomp 2007 Sep 2007 pp 72 75 This patent is subject to a terminal dis Simonite Tom Synchronised shaking connects gadgets securely claimer NewScientist com news service http www newscientist com ar ticle dn 12912 Nov 13 2007 2 pages 21 Appl No 13 047 753 cited by examiner 22 Filed Mar 14 2011 SEON Primary Examiner Eugene Yun Related U S Application Data 14 Attorney Agent or Firm
11. able by the mass storage device 725 and for causing the processor 710 to operate in accordance with the methods and teachings herein The present invention may also be embodied in a handheld or portable device containing a subset of the computer hard ware components described above For example the hand held device may be configured to contain only the bus 715 the processor 710 and memory 750 and or 725 The handheld device may also be configured to include a set of buttons or input signaling components with which a user may select from a set of available options The handheld device may also be configured to include an output apparatus such as a liquid crystal display LCD or display element matrix for display ing information to a user of the handheld device Conven tional methods may be used to implement such a handheld device The implementation of the present invention for such a device would be apparent to one of ordinary skill in the art given the disclosure of the present invention as provided herein The present invention may also be embodied in a special purpose appliance including a subset of the computer hard ware components described above For example the appli ance may include a processor 710 a data storage device 725 a bus 715 and memory 750 and only rudimentary commu nications mechanisms such as a small touch screen that per mits the user to communicate in a basic manner with the device In general the more specia
12. ated by motions 630 t Send out connection request to identified device 640 L Create key for secure channel based on motions 650 Sheet 6 of 7 Connection made 660 Secure connection using key 680 690 US 8 897 704 B1 Fig 6 U S Patent Nov 25 2014 Sheet 7 of 7 US 8 897 704 B1 770 700 Display 710 750 Processing 775 Unit Mamoy Alphanumeric Input Device 715 Bus 780 Cursor Control Non volatile Storage storage Device Communications Device Fig 7 US 8 897 704 B1 1 METHOD AND APPARATUS TO ENABLE USE OF MOTION TO ASSOCIATE DEVICES RELATED APPLICATIONS The present application is a continuation of U S applica tion Ser No 11 855 133 filed on Sep 13 2007 which is now U S Pat No 7 907 901 issuing on Mar 15 2011 FIELD OF THE INVENTION The present invention relates to associating devices and more particularly to associating at least two mobile devices with each other BACKGROUND Pairing describes associating devices with each other For example a multi device remote control may need to be paired with the associated television or a Bluetooth headset may be paired with the mobile phone that the user would like to use with it Generally in the prior art pairing the devices was a long and involved process For example a typical
13. ces holding them in the same hand The movement pattern in one embodiment is used both to identify which devices one intends to pair and then generate the key that will create the secure connection In an alternate embodiment a certain motion automatically launches the pairing process The pro cess then looks for nearby devices and attempts to pair with them only completing the pairing if the exact motion pattern of that device s motion and the date time stamp of the motion also match In one embodiment this happens in the back ground transparently to the user By holding the two devices together they become effectively one body and the accelera tions measured by the accelerometer in each device are of the same magnitude In contrast if the devices were simply held separately and similar motions were made there would be a differential not only because humans cannot reproduce the identical motions but also because of mass differentials between the devices Although the term pairing is used it should be understood that this association need not create a permanent relationship between the devices Rather itis used to exchange data between the devices FIG 1 is a network diagram of the devices A first device 110 is designed to be paired with a second device 120 Both devices in one embodiment include a motion sensor 115 125 The user then performs a preset motion with both devices in one hand This ensures that both devices r
14. connection request is sent out to the iden tified device In one embodiment the request is as targeted as possible At block 650 a secure channel is created In one embodi ment the secure channel is created by creating a unique key based on the motions performed by the user The motion data may be converted into a series of numbers i e each motion segment represented by a number In one embodiment a look up table may be used for this conversion In one embodi ment the series of numbers may be used to generate the key through a one way hash function Alternative methods of generating the key may be used At block 660 the process determines whether a successful connection was made If not the process determines if the attempt has timed out If not the process continues to try for a connection Otherwise the process ends at block 690 Ifa connection is made it is secured using the key at block 680 The data exchange as described above occurs at that point The process then ends FIG 7 is one embodiment of a computer system that may be used with the present invention It will be apparent to those of ordinary skill in the art however that other alternative systems of various system architectures may also be used The data processing system illustrated in FIG 7 includes a bus or other internal communication means 715 for commu nicating information and a processor 710 coupled to the bus 715 for processing information The system f
15. eceive exactly the same motion data This motion data is used to pair the two devices This process is described in more detail below An alternative pairing may be between the first device 110 and the third device 130 The third device 130 in one embodi ment also includes a motion sensor 135 However in this example the third device 130 does not have the processing capability necessary to provide motion analysis provide device identification and or provide an encryption key for a secure connection Therefore the third device 130 relies on a server 150 to provide at least some processing and or memory for the connection In one embodiment both the first device US 8 897 704 B1 3 110 and third device 130 are coupled to the server 150 In another embodiment only one of the devices is coupled to the server 150 and the other device need not be aware of the server connection When a server is involved in the process any portion of the processing may take place on the server An alternative pairing may be between the first device 110 and a fourth device 140 which does not have a motion sensor The fourth device 140 may be a conventional device which does not include an accelerometer or similar motion sensor For example the fourth device 140 may be a conventional Bluetooth headset while the first device 110 is a mobile phone including an accelerometer The pairing of these devices may be accomplished using the accelerometer to reduce
16. embodi ment the connection attempts are retried for a number of tries or a preset amount of time before this occurs The process then ends at block 480 Ifa secure connection can be established at block 470 data for pairing is exchanged The secure connection is then closed in one embodiment In another embodiment a pairing channel is opened based on the pairing data so that the devices are immediately paired for use The process then ends at block 480 FIG 5 is a flowchart of one embodiment of associating the two devices The process starts at block 510 At block 520 pairing motions are detected In one embodi ment the user may initiate pairing mode prior to performing pairing motions In another embodiment the pairing motions may automatically initiate pairing mode At block 530 a discovery message is sent out The discov ery message in one embodiment is sent out in the format indicated by the pairing motions For example for a Blue tooth device the discovery protocol may be to send out a wake up message paired with a trigger connection mes sage Each protocol and or device may have a different dis covery message At block 540 the process determines whether there was any response If not the process continues to block 545 At block 545 the process determines whether the pairing has timed out If not the process returns to block 530 to send out a new discovery message In one embodiment the pairing
17. hat is claimed is 1 A method of associating two devices to exchange data comprising with one device receiving a signal to enter into pairing mode generating a key based on acceleration data the accelera tion data used to calculate a differential motion pattern performed by the device the differential motion pattern enabling holding of the device at any angle establishing a secure connection with an other device the secure connection established based on the key gener ated in part based on the motion pattern the secure connection established when the device and the other device devices generate the same key based on the same motion pattern and exchanging data with the other device 2 The method of claim 1 wherein receiving a signal to enter into pairing mode comprises receiving indication through a user interface that a pairing is about to be initiated 3 The method of claim 1 wherein the signal indicating a pairing comprises a signal identifying a target device for pairing 4 The method of claim 1 wherein the motion indicating a pairing comprises any motion performed simultaneously with the two devices 5 The method of claim 1 wherein the motion indicating a pairing comprises a unique motion signature to initiate the pairing mode wherein the motion signature further com prises the signal received to initiate the pairing mode 6 The method of claim 1 wherein the key is generated in response to receiving the signal to
18. ing mode comprises a discovery signal identi fying a target device for pairing 17 The mobile device of claim 12 wherein the pairing logic further comprises a motion identifier to receive a motion indicating a pairing the motion being any motion performed simultaneously with a plurality of devices 18 The mobile device of claim 12 wherein the pairing logic further comprises a motion identifier to identify a unique motion signature to initiate the pairing mode wherein the unique motion signature is used by the target device identification logic to initiate the pairing mode 19 The mobile device of claim 12 wherein the data exchange logic exchanges information between the mobile device and the other device 20 The mobile device of claim 12 further comprising aconnector to connect to a server the server providing data regarding the other device to enable the pairing of the mobile device and the other device E E
19. ks of the two devices based on the hand shake data and using the motion data and associated clock data to pair the two devices 12 A mobile device comprising a motion sensor to detect movement a pairing logic to enable data exchange with another device the pairing logic comprising a motion identifier to use data from the motion sensor to generate differential motion pattern the differential motion pattern used for pairing with another device a key generation logic to generate a key based on the differential motion pattern performed by the mobile device a secure connection logic to establish a secure connec tion with the other device the secure connection established when the key matches a key generated in the other device indicating that the devices per formed an identical differential motion pattern and data exchange logic to exchange data with the other device over the secure connection 20 25 10 13 The mobile device of claim 12 wherein the pairing logic further comprises a user interface element to receive a signal to enter into pairing mode 14 The mobile device of claim 12 wherein the motion identifier is further to identify a motion pattern indicating pairing 15 The mobile device of claim 12 wherein the pairing logic further comprises a discovery logic to send or receive a signal to enter the mobile device into pairing mode 16 The mobile device of claim 15 wherein the signal to enter into pair
20. l purpose the device is the fewer of the elements need be present for the device to func tion In some devices communications with the user may be through a touch based screen or similar mechanism Tt will be appreciated by those of ordinary skill in the art that any configuration of the system may be used for various purposes according to the particular implementation The control logic or software implementing the present invention can be stored on any machine readable medium locally or a 5 25 35 40 45 60 65 8 remotely accessible to processor 710 A machine readable medium includes any mechanism for storing or transmitting information in a form readable by a machine e g a com puter For example a machine readable medium includes read only memory ROM random access memory RAM magnetic disk storage media optical storage media flash memory devices electrical optical acoustical or other forms of propagated signals e g carrier waves infrared signals digital signals etc In the foregoing specification the invention has been described with reference to specific exemplary embodiments thereof It will however be evident that various modifica tions and changes may be made thereto without departing from the broader spirit and scope of the invention as set forth in the appended claims The specification and drawings are accordingly to be regarded in an illustrative rather than a restrictive sense W
21. on component may be a rapid horizontal shake or a clockwise circle etc The target device identification logic 240 uses these motion compo nents and data from the device patterns library 245 to iden tify which devices should be paired Secure connection logic 250 then establishes a secure con nection between the device and the identified target device In one embodiment the motions i e accelerations are used to generate a key by key generation logic 255 This key is used to establish the secure connection Since the two devices are moved together they have performed the identical motions and thus captured substantially identical motion data There fore the motion data can be used to ensure that the correct devices are paired In one embodiment relative motion data is used instead of absolute motion data This ensures that even if there are calibration differences between the accelerom eters in the two devices the same key is generated In one embodiment the accelerometer data is smoothed filtered and or normalized prior to performing the key gen eration This ensures that the two devices data match if they experienced the same motions In one embodiment a clock differential between the two devices is identified so that an absolute clock time may be used for comparison purposes For example the system may calculate that one of the devices is 3 seconds ahead of the other device and is 0 02 seconds faster
22. process is maintained for a preset period of time or a preset number of discovery messages For example the system may attempt pairing for 1 minute with discovery messages being re sent every 10 seconds If the system times out the process ends at block 550 Ifa response is received at block 540 the process contin ues to block 555 At block 555 the process compares the detected motions to establish whether the devices were moved together for pair ing In one embodiment comparing the detected motions is a three step process First in one embodiment the systems perform a clock differential correction In one embodiment the clock differ ential correction involves using the time stamps on handshake messages to determine clock differential between the devices The clock differential may include a per minute dif ferential as well as a base differential For example clock A may be 3 seconds ahead while clock B loses 0 1 second per minute Once the clock differential is determined the system has an absolute time available to use for the comparison Second the system in one embodiment accounts for dif ferent relative positions between the objects being paired Since the user can hold the devices together in any configu ration the detected motions would be along different axes depending on relative positions This also compensates for different accelerometer locations and orientations within the devices In one embodiment a first mo
23. process starts at block 410 At block 420 a command to place the device into pairing mode is received In one embodiment this command may be initiated through a menu selection through a motion or through other means In one embodi ment when the device is placed in pairing mode the system indicates to the user to take both devices hold them together and perform a pairing motion In one embodiment the device may provide a list of potential pairing motions based on the identity of the devices to be paired At block 430 the motions initiating pairing are received In one embodiment the motions identify the device to be paired For example a triple shake of the device may indicate pairing with a Bluetooth headset For another example a double shake up and down may indicate pairing with a particular sensor In one embodiment motion data is filtered on all three axes using a low pass filter In one embodiment the low pass filter is configured to have a frequency cutoff at 4 Hz The filter removes transient noise and allows the detection ofhand movement that exhibits a change of direction greater than 250 ms In one embodiment each of the axes will be scaled to have a normalized motion of 1 G acceleration equivalent to 1000 integer counts During the initial steady state in one embodiment the dominant vector affected by Earth s gravi tational field will be used to determine the accelerometer orientation on both devices In one embodiment
24. tion pattern is used to orient the relative accelerometers In one embodiment for each motion pattern the first motion is a spike or other notice able motion pattern 20 25 30 35 40 45 50 55 60 65 6 Third the system compares motions or accelerations at absolute times In one embodiment the motion data is filtered and smoothed prior to comparison At block 560 the process determines whether the motions match If they do not match the process returns to block 545 to determine whether the process should time out or resend the discovery message Ifthe motions match at block 570 the secure connection is created and data is exchanged for the pairing at block 580 FIG 6 is a flowchart of an alternative embodiment of associating the two devices The process starts at block 610 At block 620 a series of motions is detected At block 630 the series of motions is identified as a series of motions to initiate pairing with device identification At block 630 the system further identifies the device indicated by the motions In one embodiment the particular device type is identified i e Bluetooth headset In another embodiment the protocol used by the device is identified i e Bluetooth device In another embodiment the device manufacturer and type is identified i e Jabra Bluetooth headset In yet another embodiment the precise device is identified i e the Jabra Freespeak headset At block 640 a
25. urther com prises a random access memory RAM or other volatile storage device 750 referred to as memory coupled to bus 715 for storing information and instructions to be executed by processor 710 Main memory 750 also may be used for stor ing temporary variables or other intermediate information during execution of instructions by processor 710 The sys tem also comprises a read only memory ROM and or static storage device 720 coupled to bus 715 for storing static infor mation and instructions for processor 710 and a data storage device 725 such as a magnetic disk or optical disk and its corresponding disk drive Data storage device 725 is coupled to bus 715 for storing information and instructions The system may further be coupled to a display device 770 such as a cathode ray tube CRT or a liquid crystal display LCD coupled to bus 715 through bus 765 for displaying information to a computer user An alphanumeric input device 775 including alphanumeric and other keys may also be coupled to bus 715 through bus 765 for communicating US 8 897 704 B1 7 information and command selections to processor 710 An additional user input device is cursor control device 780 such as a mouse a trackball stylus or cursor direction keys coupled to bus 715 through bus 765 for communicating direc tion information and command selections to processor 710 and for controlling cursor movement on display device 770 Another device which may
Download Pdf Manuals
Related Search