초록 ▼

In one embodiment of the invention, a hot spot is normally centered in an area of contact between a user's finger and a touch screen to position the hot spot on an icon or other feature thereby selecting a program or function corresponding to the icon or feature. When the contact area is near an edg

In one embodiment of the invention, a hot spot is normally centered in an area of contact between a user's finger and a touch screen to position the hot spot on an icon or other feature thereby selecting a program or function corresponding to the icon or feature. When the contact area is near an edge, the hot spot is offset toward the edge so that it coincides more closely to the center of the users finger, thus allowing an icon or other feature adjacent the edge of the screen to be more easily selected. In another embodiment, a cursor is displayed on a touch screen at a location that is offset from the contact area between a finger and the screen. The cursor, which is used as the hot spot of the computer, is normally offset above the contact area except when the contact area is close to the bottom of the screen. The cursor is then offset to the left or right of the contact area depending on whether the contact are is to the left or right of the screen, respectively, so that icons or features adjacent the left or right edges of the screen can be selected. Similarly, when the contact area is very close to the bottom of the screen, the cursor is offset downwardly and to the right or left so that icons or features adjacent the bottom edge of the screen can be selected. Alternatively, a touch sensitive area incapable of displaying an image may be provided beneath a display area of the touch screen to allow icons or features adjacent the bottom edge of the display area to be selected.

대표청구항 ▼

In one embodiment of the invention, a hot spot is normally centered in an area of contact between a user's finger and a touch screen to position the hot spot on an icon or other feature thereby selecting a program or function corresponding to the icon or feature. When the contact area is near an edg

In one embodiment of the invention, a hot spot is normally centered in an area of contact between a user's finger and a touch screen to position the hot spot on an icon or other feature thereby selecting a program or function corresponding to the icon or feature. When the contact area is near an edge, the hot spot is offset toward the edge so that it coincides more closely to the center of the users finger, thus allowing an icon or other feature adjacent the edge of the screen to be more easily selected. In another embodiment, a cursor is displayed on a touch screen at a location that is offset from the contact area between a finger and the screen. The cursor, which is used as the hot spot of the computer, is normally offset above the contact area except when the contact area is close to the bottom of the screen. The cursor is then offset to the left or right of the contact area depending on whether the contact are is to the left or right of the screen, respectively, so that icons or features adjacent the left or right edges of the screen can be selected. Similarly, when the contact area is very close to the bottom of the screen, the cursor is offset downwardly and to the right or left so that icons or features adjacent the bottom edge of the screen can be selected. Alternatively, a touch sensitive area incapable of displaying an image may be provided beneath a display area of the touch screen to allow icons or features adjacent the bottom edge of the display area to be selected. 5581252, 19961200, Thomas, 341/144; US-5619203, 19970400, Gross, Jr. et al., 341/144; US-5675269, 19971000, Nakauchi, 327/077; US-5703588, 19971200, Rivoir et al., 341/159; US-5731775, 19980300, Gross, Jr. et al., 341/155; US-5744385, 19980400, Hojabri, 438/238; US-6157335, 20001200, Suzuki et al., 341/154; US-6163289, 20001200, Ginetti, 341/141; US-6433717, 20020800, Leung, 341/144 h value of digital input data for each bit of a basic clock pulse train, and outputting a conversion result as a PWM signal, said PWM converting circuit comprising: a pulse generator for generating two pulse signals, asserting one of a low level and a high level, for each bit of a basic clock pulse train in response to value of digital input data; and a differential amplifier for outputting a differential amplification component between the two pulse signals as the PWM signal, wherein said pulse generator varies pulse width of a first of the two pulse signals, on a bit-by-bit basis, of the basic clock pulse train, in response to the value of the digital input data, and holds a level of a second of the two pulse signals throughout the bits of the basic clock pulse train. 10. A pulse width modulation (PWM) converting method PWM converting each value of digital input data for each bit of a basic clock pulse train, and outputs a conversion result as a PWM signal, said PWM converting method comprising: generating two pulse signals, asserting one having a low level and one having a high level for each bit of a basic clock pulse train, in response to value of digital input data; varying a pulse width of a first of the two pulse signals, on a bit-by-bit basis, of the basic clock pulse train, in response to the value of the digital input data; holding a level of a second of the two pulse signals throughout the bits of the basic clock pulse train; and outputting a differential amplification component between the two pulse signals as the PWM signal. gnal comprises applying a Discrete Fourier Transform. 5. A method according to claim 4, wherein said transform coefficients of the expected transmitted signal comprise Discrete Fourier Transform coefficients of said expected transmitted signal. 6. A method according to claim 5, wherein said transform value ratios are divided by factors thereof so as to provide transform value ratio coefficients. 7. A method of performing synchronisation for a receiver operating in a global positioning system comprising a plurality of satellites transmitting ranging signals, said synchronising being performed with respect to said transmitted ranging signals and comprises the steps of transform coding said received signal so as to transform said received signal from time domain to frequency domain coefficients, dividing respective ones of said frequency domain coefficients by corresponding ones of transform coefficients of the expected transmitted signal associated with said satellite to provide corresponding transform value ratios, and processing said transform value ratios so as to provide corresponding scaled values that are indicative of the time delay of the signal travelling between the satellite and the receiver. 8. A receiver for a satellite based positioning system operable so as to synchronise with respect to a received signal transmitted from a satellite of said system, said synchronisation comprising transform coding means for transform coding said received signal so as to transform said received signal from time domain to frequency domain coefficients, dividing means for dividing respective ones of said frequency domain coefficients by corresponding ones of transform coefficients of the expected transmitted signal associated with said satellite to provide corresponding transform value ratios, and processing means for processing said transform value ratios so as to provide corresponding scaled values that are indicative of the time delay of the signal travelling between the satellite and the receiver. 9. A satellite based positioning system in which a plurality of satellites transmit ranging signals and a receiver receives the transmitted ranging signals and performs synchronisation with respect to said ranging signals, said synchronisation comprising transform coding means for transform coding said received signal so as to transform said received signal from time domain to frequency domain coefficients, dividing means for dividing respective ones of said frequency domain coefficients by corresponding ones of transform coefficients of the expected transmitted signal associated with said satellite to provide corresponding transform value ratios, and processing means for processing said transform value ratios so as to provide corresponding scaled values that are indicative of the time delay of the signal travelling between the satellite and the receiver. 10. A computer program on a carrier for synchronising a receiver operating in a global positioning system comprising a plurality of satellites transmitting ranging signals, said synchronising being performed with respect to said transmitted ranging signals and comprises transform coding means for transform coding said received signal so as to transform said received signal from time domain to frequency domain coefficients, dividing means for dividing respective ones of said frequency domain coefficients by corresponding ones of transform coefficients of the expected transmitted signal associated with said satellite to provide corresponding transform value ratios, and processing means for processing said transform value ratios so as to provide corresponding scaled values that are indicative of the time delay of the signal travelling between the satellite and the receiver. 11. A computer program product operable to synchronise a receiver operating in a global positioning system comprising a plurality of satellites transmitting ranging signals, said synchronising being performed with resp ect to said transmitted ranging signals and comprises transform coding means for transform coding said received signal so as to transform said received signal from time domain to frequency domain coefficients, dividing means for dividing respective ones of said frequency domain coefficients by corresponding ones of transform coefficients of the expected transmitted signal associated with said satellite to provide corresponding transform value ratios, and processing means for processing said transform value ratios so as to provide corresponding scaled values that are indicative of the time delay of the signal travelling between the satellite and the receiver. 12. A portable radio communication device including a transceiver for cellular communication and a receiver for a satellite based positioning system operable so as to synchronise with respect to a received signal transmitted from a satellite of said system, said synchronisation comprising transform coding means for transform coding said received signal so as to transform said received signal from time domain to frequency domain coefficients, dividing means for dividing respective ones of said frequency domain coefficients by corresponding ones of transform coefficients of the expected transmitted signal associated with said satellite to provide corresponding transform value ratios, and processing means for processing said transform value ratios so as to provide corresponding scaled values that are indicative of the time delay of the signal travelling between the satellite and the receiver. ly movable member (6), a dome portion being elastically restorably invertable by being depressed by the pivotally movable member (6) to bring a dome-shaped contact terminal (52) formed on an inner surface of the dome portion into contact with a contact electrode (51) formed on a surface of the base plate (5) and closing contacts; wherein one of the plurality of projectors is larger than all others of said plurality of projectors so as to provide an seesawing effect for the seesaw switch unit 4. 2. A key input device according to claim 1 wherein the base is a sheet key assembly (40) having a plurality of manual keys, and the seesaw switch unit (4) is surface-mounted on the surface of a sheet (41) forming a surface layer portion of the sheet key assembly (40). 3. A key input device according to claim 1 wherein the key rubber (8) comprises a flat plate portion (82) affixed to the rear surface of the seesaw key (10), a slanting portion (83) formed by defining the flat plate portion (82), and a grounding portion (84) formed by defining the slanting portion (83), and the slanting portion (83) is so inclined from the flat plate portion (82) to the grounding portion (84) as to be positioned at a lower level toward the base, and the grounding portion (84) is in close contact with the surface of the base. 4. A key input device according to claim 3 wherein the central portion of the rear surface of the seesaw key (10) and the central portion (81) of the surface of the flat plate portion (82) of the key rubber (8) are affixed to each other, and the seesaw key (10) and the flat plate portion (82) of the key rubber (8) are contacted so as to be relatively movable each other around the affixed portion. 5. A portable telephone comprising a circuit board (3) disposed inside a casing (1) and formed with a circuit for radio communication, a sheet key assembly (40) installed on the circuit board (3), a seesaw switch unit (4) installed on the surface of the sheet key assembly (40), a key rubber (8) provided covering the surface of the sheet key assembly (40) and the seesaw switch unit (4), the key rubber (8) having arranged on its surface a plurality of manual keys (14) for depressing the sheet key assembly (40) and a seesaw key (10) for depressing the seesaw switch unit (4), the seesaw switch unit (4) comprising a base plate (5), a dome sheet (7) having a plurality of dome portions (71)(72) and provided over the base plate (5), and a pivotally movable member (6) with a plurality of projectors provided over the dome sheet (7) for selectively depressing each dome portion (71), the seesaw key (10) disposed over the pivotally movable member (6), a dome portion being elastically restorably invertable by being depressed by the pivotally movable member (6) to bring a dome-shaped contact terminal (52) formed on an inner surface of the dome portion into contact with a contact electrode (51) formed on the surface of the base plate (5) and closing contacts; wherein one of the plurality of projectors is larger than all others of said plurality of projectors so as to provide an seesawing effect for the seesaw switch unit 4. 6. A portable telephone according to claim 5 wherein the seesaw switch unit (4) is surface-mounted on the sheet key assembly (40). 7. A portable telephone according to claim 5 wherein the key rubber (8) comprises a flat plate portion (82) affixed to the rear surface of the seesaw key (10), a slanting portion (83) formed by defining the flat plate portion (82), and a grounding portion (84) formed by defining the slanting portion (83), and the slanting portion (83) is so inclined from the flat plate portion (82) to the grounding portion (84) as to be positioned at a lower level toward the sheet key assembly (40), and the grounding portion (84) is in close contact with the surface of the sheet key assembly (40). 8. A portable telephone according to claim 7 wherein the central portion of the rear surface of the seesaw key (10) and th e central portion (81) of the surface of the flat plate portion (82) of the key rubber (8) are affixed to each other, and the seesaw key (10) and the flat plate portion (82) of the key rubber (8) are contacted so as to be relatively movable each other around the affixed portion.