Driving an electrophoretic display
AssigneeKoninklijke Philips Electronics N.V.
InventorMark Johnson
Life of this patent
Estimating the term…
Abstract
A drive circuit for an electrophoretic matrix display comprises a select driver (16) for selecting lines of pixels (18) of the matrix display. A data driver (10) supplies drive voltage waveforms (VD) to each one of the selected pixels (18) via data electrodes (5, 5′). A controller (15) controls the select driver (16) to select a group of lines of pixels (18) at a same time during portions of the drive voltage waveforms (VD) which for each of the data electrodes (5, 5′) are equal for at least all the pixels (18) which are associated with the same one of the data electrodes (5, 5′).
Claims22
A drive circuit for an electrophoretic matrix display with a plurality of pixels (18), the drive circuit comprising:
- a select driver (16) for selecting lines of the pixels (18),
- a data driver (10) for supplying drive waveforms (VD) to the selected pixels (18) via data electrodes (5, 5′), and
- a controller (15) for controlling the select driver (16) to select a group of lines of pixels (18) at the same time during a portion of the drive waveforms (VD) being identical for at least all selected pixels (18) of each one of the data electrodes (5, 5′).
A method of driving an electrophoretic matrix display comprising a plurality of pixels (18), the method comprising:
- selecting (16) lines of the pixels (18),
- supplying (10) drive voltage waveforms (VD) to each one of the selected pixels (18) via data electrodes (5, 5′), and
- controlling (15) the select driver (16) to select a group of lines of pixels (18) at a same time during portions of the drive voltage waveforms (VD) which for each of the data electrodes (5, 5,) are equal for at least all the pixels (18) being associated with the same one of the data electrodes (5, 5′).
Dependencies are inferred from the claim text.