Input device for a display system using phase-encoded signals
First Claim
Patent Images
1. A display system, comprising:
- remote transmitting means, subject to movement, for producing a signal when energized;
means for receiving said signal;
said remote transmitting means having a pointing axis, said remote transmitting means being intended to be operated by a user at a distance substantially displaced from said receiving means along a line of sight between said remote transmitting means and said receiving means;
means having a display surface and coupled to said receiving means for displaying an index at a point derived from said signal; and
a plurality of transducers mounted on said transmitting means and physically disposed so as to enable said receiving means to determine the position of said index at said point on said display surface, said index exhibiting movement relative to movement of said transmitting means;
said transducers being energized with energizing signals which are phase-shifted such that oppositely oriented transducers are energized with oppositely phase-shifted energizing signals;
said signals being combined at said receiver to produce a resultant signal having a phase angle which varies in response to the angular position of said pointing axis of said remote transmitting means relative to said line of sight between remote transmitting means and said receiving means.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a display system using a remote control handunit having "pointing function" capability for moving a cursor displayed on a display screen by changing the angular position of the remote control handunit. Specifically, the individual transmitting transducers of the remote control handunit are driven with signals having a predetermined phase relationship relative to each other such that the resultant phase received by the receiver is indicative of transmitter angular position.
-
Citations
8 Claims
-
1. A display system, comprising:
-
remote transmitting means, subject to movement, for producing a signal when energized; means for receiving said signal; said remote transmitting means having a pointing axis, said remote transmitting means being intended to be operated by a user at a distance substantially displaced from said receiving means along a line of sight between said remote transmitting means and said receiving means; means having a display surface and coupled to said receiving means for displaying an index at a point derived from said signal; and a plurality of transducers mounted on said transmitting means and physically disposed so as to enable said receiving means to determine the position of said index at said point on said display surface, said index exhibiting movement relative to movement of said transmitting means; said transducers being energized with energizing signals which are phase-shifted such that oppositely oriented transducers are energized with oppositely phase-shifted energizing signals; said signals being combined at said receiver to produce a resultant signal having a phase angle which varies in response to the angular position of said pointing axis of said remote transmitting means relative to said line of sight between remote transmitting means and said receiving means. - View Dependent Claims (2, 3)
-
-
4. A display system, comprising:
-
remote transmitting means, subject to movement, for producing a signal when energized; means for receiving said signal; means having a display surface and coupled to said receiving means for displaying an index at a point derived from said signal; and a plurality of transducers mounted on said transmitting means and physically disposed so as to enable said receiving means to determine the position of said index at said point on said display surface, said index exhibiting movement relative to movement of said transmitting means; said transducers being energized with energizing signals which are phase-shifted such that oppositely oriented transducers are energized with oppositely phase-shifted energizing signals; said signals being combined at said receiver to produce a resultant signal having a phase angle which varies in response to the angular position of said transmitting means relative to said receiving means; said transmitting means has a pointing axis and said transducers each have a respective pointing axis; and said transducers are mounted on said transmitting means and aligned such that said pointing axes of said transducers diverge from each other and from said pointing axis of said transmitting means; said receiving means comprises a phase-locked loop for detecting the phase angle of a synchronizing portion of said transmitted signal, said synchronizing portion of said transmitted signal being used to synchronize circuits of said receiving means; said receiving means further comprises memory means for generating reference signals for comparison against said transmitted signal for the decoding thereof. - View Dependent Claims (5, 6, 7)
-
-
8. A remote control system, comprising;
-
remote transmitting means including transducing means disposed for radiating a plurality of predetermined angularly spaced information beams when energized said transmitting means intended to be operated by a user at a distance substantially displaced from a receiving means along a line of sight between said remote transmitting means and said receiving means; and means for energizing said transducing means with energizing signals having predetermined phase shifts corresponding to associated ones of said plurality of beams; said receiving means, being mounted in a fixed position relative to said transmitting means, receiving said plurality of beams and being responsive to relative phase shift relationships between signals derived from said plurality of beams for producing a control signals indicative of the angular displacement of said beams relative to said receiving means.
-
Specification