IR signal cross-talk elimination
AssigneeMitsubishi Electric Visual Solutions America, Inc.
InventorHarlan Rogers
Life of this patent
Estimating the term…
Abstract
Systems and methods that facilitate the elimination of interference of an IR signal emitted from an IR blaster by the IR signal emitted from a remote control unit. In a preferred embodiment in which an AV device coupled to a television receives IR signals repeated and transmitted by the television over an IR blaster cable, a right hand polarizer lens is positioned on the front of the remote control unit in front of the IR emitter and a left hand polarizer lens is positioned on the AV device in front of its IR detector. In operation, the IR beam emitted from the remote control unit is right hand polarized and is blocked by the left hand polarizer lens. The IR beam emitted from the IR blaster is randomly polarized and passes through the left hand polarizer lens with only a slight attenuation.
Claims13
A television system comprising
- a television,
- an AV device coupled to the television, wherein the AV device includes a first polarizing lens positioned in front of its IR detector,
- a remote control unit operably coupled to the television, wherein the remote control unit comprises a second polarizing lens positioned in front of the remote control unit's IR emitter and having a polarization opposite to the first polarizing lens, and
- an IR blaster coupled to the television and operably coupled to the IR detector of the AV device.
A television system comprising
- a television,
- a remote control unit operably coupled to the television, wherein the remote control unit is configured to emit IR signals having a first polarization,
- an IR blaster coupled to the television, and
- a first polarizing lens positionable between an IR emitter of the IR blaster and an IR detector of a device to be controlled and having a polarization opposite to the first polarization.
A remote control unit kit comprising
- a universal remote control unit configurable to transmit IR signals to control a television and one or more AV devices couplable to the television,
- a first polarizing lens couplable to the universal remote control unit in front of the IR emitter of the remote control unit and having a first polarization, and
- one or more polarizing lens positionable in front of IR detector of the one or more AV devices, the one or more polarizing lens having a second polarization opposite to the first polarization.
A method of controlling one or more AV devices coupled to a television comprising the steps of
- transmitting IR signals from a remote control unit at an IR signal detector of a television, the IR signals having a first polarization,
- transmitting the IR signals from an IR repeater coupled to the IR signal detector of the television over an IR blaster cable,
- emitting the IR signals from an IR emitter of an IR blaster coupled to the IR blaster cable at an IR detector of an AV device coupled to the television, the IR signals having a second polarization, and
- blocking IR signals having a first polarization from reaching the IR detector of the AV device.
Dependencies are inferred from the claim text.