ROTATION SENSITIVE REMOTE CONTROL USING POLARIZED LIGHT
Systems and methods that facilitate rotation sensitive remote control of televisions and the like using polarized light. The remote control unit and the infrared (IR) signal detection system of the television are preferably sensitive to rotation of the remote control unit about its longitudinal axis. Rotation of the remote control unit in coordination with depression of keys or buttons on the remote control unit enables enhanced and quicker navigation through a list of options presented in a user interface displayed on the television screen such as, for example, to turn up or down the volume with a single motion.
1 . A rotation sensitive remote control system comprising
a remote control unit comprising
a plurality of infrared LEDs with differing polarizations, and
a plurality of keys that can be held down to cause the plurality of LEDs to emit IR signals as the remote is rotated,
an IR rotation sensitive detector system comprising
an IR detector,
a polarizing filter positioned in front of the IR detector, and
a logic unit capable of sensing the patterns of illumination of the plurality of LEDs on the remote control unit, determining the contribution made by each of the plurality of LEDs, and deriving a relative angle at which the remote control is positioned.
2 . The system of claim 1 wherein the logic unit includes a preamp coupled to the IR detector and a processor coupled to the preamp.
3 . The system of claim 1 wherein the remote control unit is adapted to transmitted IR signals comprised of patterns of illumination having a sequence of unique subsets of the plurality of LEDs from which the contribution of each of the plurality of LEDs can be extracted.
4 . A television system comprising rotation sensitive remote control system comprising
a display screen,
an on screen display controller,
a remote control unit comprising
a plurality of infrared LEDs whose polarizations differ one from another, and
a plurality of keys that can be held down to cause the plurality of LEDs to emit IR signals as the remote is rotated, and
a control system coupled to the on screen display controller, the control system including an IR rotation sensitive detector system comprising
an IR detector,
a polarizing filter positioned in front of the IR detector, and
a logic unit capable of sensing the patterns of illumination of the plurality of LEDs on the remote control unit, determining the contribution made by each of the plurality of LEDs, and deriving a relative angle at which the remote control is positioned,
wherein the control system includes a graphical user interface system displayable on the screen.
5 . The system of claim 4 wherein the logic unit includes a preamp coupled to the IR detector and a processor coupled to the preamp.
6 . The system of claim 4 wherein the remote control unit is adapted to transmitted IR signals comprised of patterns of illumination having a sequence of unique subsets of the plurality of LEDs from which the contribution of each of the plurality of LEDs can be extracted.
7 . The system of claim 4 wherein the control system is adapted to use the derived position of the remote control unit to derive and display a user's navigation, selection or adjustments within the graphical user interface.
8 . A process of controlling a television comprising the steps of
sensing the patterns of illumination of a plurality of LEDs on a remote control unit,
determining the contribution made by each of the plurality of LEDs, and
deriving a relative angle at which the remote control is positioned.
9 . The process of claim 8 further comprising the steps of
transmitting IR signals comprised of patterns of illumination having a sequence of unique subsets corresponding to the plurality of LEDs from which the contribution of each of the plurality of LEDs can be extracted.
10 . The process of claim 9 further comprising the steps of
filtering the IR signals sensed by an IR detector with a polarized filter.
11 . The process of claim 10 further comprising the steps of
converting a voltage output by the detector into a plurality of signals corresponding to the plurality of LEDs.
12 . The process of claim 11 further comprising the steps of
converting a quadrature relationship of the plurality of signals into a rotation value.
13 . The process of claim 12 further comprising the steps of
navigating a user interface as a function of the rotation value.