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US 8,526,584 B2Granted
Device and method for preventing ion build-up in liquid crystal displays
AssigneeMitel Networks Corporation
InventorEdward Peter Gancarcik
Life of this patent
Estimating the term…
Abstract
A desktop network protocol telephone set has a network interface for connecting the telephone set to a local area network. An audio interface provides audio signals to and from a handset of the telephone set. A processing circuit is responsive to communications from the network interface. A control circuit coupled to the processing circuit is used for changing a driving frequency of the LCD panel.
Claims7
A desktop network protocol telephone set, comprising:
- a network interface for connecting the telephone set to a local area network;
- an audio interface for providing audio signals to and from a handset of the telephone set;
- a processing circuit responsive to communications from the network interface;
- and
- a control circuit for setting a clock signal driving an LCD panel at a first driving frequency during a full power operating mode of the telephone set and a second, higher driving frequency during a low power operating mode of the telephone set.
2 more elements
A method of operation of a desktop network protocol telephone set coupled to a local area network by a network interface, comprising:
- first receiving first network transmissions from the local area network corresponding to received audio signals;
- first converting the first network transmissions to a first audio signal provided to a handset of the telephone set;
- second receiving a second audio signal from the handset;
- second converting the second audio signal to second network transmissions and providing them to the network interface;
- determining an operating state of the telephone set;
- setting a frequency of a clock signal driving an LCD panel of the telephone set at a first driving frequency during a full power operating mode of the telephone set and at a second, higher driving frequency during a low power operating mode of the telephone set.
3 more elements
Dependencies are inferred from the claim text.