Active matrix liquid crystal display
AssigneeVictor Company of Japan, Ltd.
InventorMasato Furuya
Life of this patent
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Abstract
An active matrix LCD defines a display signal period and a reset period in each vertical scan period. The display signal period is a period to write and hold display signals in pixels in response to a row select pulse generated from an output pulse of a first shift register (SR1). The reset period is a period to write and hold a reset voltage in the pixels in response to a row select pulse generated from an output pulse of a second shift register (SR2). The ratio of the display signal period to the reset period is adjustable in units of horizontal scan time by changing the number “n” of horizontal scan periods to be passed between the time when the first shift register receives a scan start signal (WT) and the time when the second shift register receives a scan start signal (Reset).
Claims2
An active matrix LCD having column electrodes for display signals and row electrodes for scanning, the row electrodes being orthogonal to the column electrodes, a column driver to sequentially supply display signals to the column electrodes, a row driver to sequentially supply row select pulses to the row electrodes, and pixels arranged in a matrix at intersections of the column and row electrodes, respectively, the column driver sequentially supplying, in each horizontal scan period, display signals to the column electrodes so that the display signals are written in a row of the pixels the row driver has selected for the horizontal scan period, the active matrix LCD comprising:
- a controller configured to optionally set the ratio of a display signal period to a reset period, the display and reset periods being defined in each vertical scan period, the display signal period being a period to write and hold display signals in those of the pixels contained in a selected row, the reset period being a period to write and hold a reset voltage in the pixels in the selected row.
Dependencies are inferred from the claim text.