Electroluminescence display apparatus for displaying gray scales
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United States of America Patent
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Nov 25, 2003
Grant Date -
Jan 30, 2003
app pub date -
Nov 23, 1999
filing date -
Nov 27, 1998
priority date (Note) -
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Abstract
The emitted luminance of an EL device is controlled in an analog manner so as to realize a multiple gray-scale display by employing a first TFT (101) for switching, which turns on and off according to a selection signal SCAN1, and a second TFT (104) for driving an EL device (103) having an emissive layer between a pair of electrodes, by providing an analog switch (31) for sampling an analog video signal (VIDEO) at a predetermined period and a capacitor (102) for holding a sampling voltage from the analog switch (31), and by applying the analog voltage held in the capacitor (102) to the gate of the second TFT.
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