Apple Files Wide Touchpad Patent
- March 2nd, 2006 - 9.37 pm UTC
- Apple Rumour
- Alex Brooks
In a filing made way back in August 2004 Apple employees describe in detail a wide touchpad and keyboard.
FIG. 1 illustrates a conventional portable computer.
Within the patent the wide touchpad is described as “The wide touchpad and keyboard disposed on the base assembly allow a user to interact with the display screen (e.g., enter data). In one embodiment, the wide touchpad may be a cursor control device having the capabilities of conventional computer mouse devices, such as the ability to point, drag, tap, and double tap objects on a graphical user interface, as well as more general purposes such as scrolling, panning, zooming, and rotating images on display screen. The wide touchpad extends into the areas on the surface of the base assembly that are normally reserved for palm rest areas (e.g., flat areas on the surface of the base assembly that support a user’s palms and/or wrists while typing). “
“FIGS. 4-5. FIG. 4 illustrates a conventional typing position with the palms of both hands resting on touchpad 224 and fingers extending over keyboard 222. The contact patches made on left sensor region 242 and right sensor region 246 would be rejected.
The relatively large sizes of the contact patches made by the palms in connection with the detection of hand location would be interpreted as unintentional or accidental contact. In this position, touchpad 224 operates only as a palm rest. FIG. 5 illustrates a dual mode position in which the left hand 280 is in a typing position and right hand 282 is in a touchpad position. The contact patch from left hand 280 (e.g., the palm) would be rejected because the location of left hand 280 would be detected by sensor 240. Accordingly, either the entire left sensor region 242, which is associated with the location of left hand 280 and the contact patch, or the particular contact patch made by left hand 280 on left sensor region 242 would be rendered inactive for touchpad commands, and operate only as a palm rest. The contact patch made by the finger of right hand 282 would be accepted as an intentional contact. The sensor would not detect any hand presence associated with right sensor region 246. As described above, the calculations performed by operation 400 include measuring the size and trajectory of the contact patch made by right hand 282. A comparison with the contact patch from left hand 280 may also be performed to establish the accept/reject criteria.”
“”The surface of the touchpad may include a grid of conductive metal wires covered by an insulator. When two electrically conductive objects
come near each other without touching, their electric fields interact to form capacitance. Also, when another conductive material, such as a human finger, comes in contact with the touchpad surface, a capacitance forms.”











