Patent attributes
An input device providing users with a pointing capability includes a sender portion (100) and a receiver portion (200). The sender portion (100) is adapted to be manipulated by a user (the user manipulating button 125) to specify a target point within a target area. The sender portion projects a light beam (light output from light source 115) including a pattern onto the target area. A receiver portion (200) includes one or more sensor units (205, 210, 215) located in or near the target area. At least some of the sensor units (205, 210, 215) receive a portion of the light beam (light output from light source 115) regardless of the location of the target point within the target area. A processing unit (220) in the receiver portion (200) analyzes the portions of the light beam received by one or more sensor units (205, 210, 215) to determine an attribute of the target point. The attribute can be the location or relative motion of the target point. The receiver portion (200) may be integrated with a display device.
