Matrix display device with energy recovery circuit
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United States of America Patent
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N/A
Issued Date -
Nov 10, 2005
app pub date -
Mar 7, 2005
filing date -
Sep 10, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Matrix display device having row electrodes (4) and column electrodes (5), an intersection of a row and a column electrode defining a pixel cell (1) having a pixel cell capacitance (8), and drive circuits (2,3). Blind energy used for charging the pixel cell capacitances (8) when driving the pixel cells (1) is not dissipated but stored into a buffer capacitor (6) through an inductor (7) forming a series inductor-capacitor circuit and subsequently recovered by discharging the buffer capacitor (6) into the pixel cell capacitances (8) through a current source (13). Energy recovery is thus current driven, which allows to control the light reflected or emitted by the pixel cell (1) in a manner which is less dependent on temperature variations and/or ageing of the device.
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