Electroluminescence display apparatus
AssigneeSanyo Electric Co., Ltd.
InventorYoshinori Saitou
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Abstract
EL devices each having an emissive layer (6) between an anode (3) and a cathode (4) are employed in a passive matrix display apparatus. To drive each device, the anodes and cathodes are arranged in a matrix configuration, and scan signals are supplied to the cathodes (4) from a row driver (8) and pulse width modulation signals having pulse widths proportional to gray scales are supplied to the anodes (3) from a column driver (9) as column driving signals COL1, COL2, COL3, . . . , COLm. The output start timing of the column driving signals COL1, COL2, COL3, . . . , COLm is set to be different for every column. This prevents the output timing of the column driving signal from coinciding at neighboring columns, eases the concentration of supply current, and reduces power consumption.
Claims5
An electroluminescence display apparatus employing electroluminescence devices as light emitting pixels and comprising:
- electroluminescence devices, each having an emissive layer between first electrodes and second electrodes, in which said first electrodes and said second electrodes are disposed in a matrix configuration so as to mutually cross;
- a first driver circuit for supplying scan signals to said second electrodes;
- and
- a second driver circuit for supplying pulse width modulation signals, having a pulse width proportional to a gray scale, as driving signals to said first electrodes, and for outputting said driving signals at different start timings for every column of the matrix during a period when each row of the matrix is selected by a scan signal.
Dependencies are inferred from the claim text.