Electrooptic device and electronic equipment
AssigneeSeiko Epson Corporation
InventorRYO ISHII
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Abstract
The present invention controls writing or holding a data signal to and in a memory circuit in a pixel driving circuit according to whether a row scanning line and a column scanning line are selected or not. According to a data signal held in the memory circuit, a pixel driver connects a first voltage signal line or a second voltage signal line to a pixel. A reference voltage is applied to a common electrode of a opposite substrate, and display is performed by a potential difference between the reference voltage and a first voltage signal or a second voltage signal. Thus, an electro-optic device is provided that consumes less power and features a simpler control method and a simpler control circuit configuration than a conventional static drive liquid crystal device.
Claims8
An electro-optic device comprising, on a substrate thereof, a plurality of row scanning lines and a plurality of column scanning lines that intersect with each other, a plurality of data lines provided along said column scanning lines, voltage signal lines that supplies voltage signals, and a plurality of pixel drive circuits disposed corresponding to intersections of said row scanning lines and said column scanning lines, wherein each of said pixel drive circuits comprises:
- a switching circuit that is set to a conducting mode when said row scanning line and said column scanning line are selected, while it is set to a nonconducting mode when at least either said row scanning line or said column scanning line are not selected;
- a memory circuit that captures data signals of said data lines when said switching circuit is in the conducting mode, while it holds data signals when said switching circuit is in the nonconducting mode;
- and
- a pixel driver that outputs a first voltage signal to a pixel from the voltage signal line when a data signal held in said memory circuit is at a first level, while it outputs a second voltage signal to the pixel from said voltage signal line when the data signal is at a second level.
Dependencies are inferred from the claim text.