Electro-optical device, precharge method thereof, image processing circuit, and electronic apparatus

Abstract

Each pixel which is arranged in a plurality of scanning lines and a plurality of data wires that are divided into groups with N strips (N is a natural number larger than or equal to 2) in the display panel, becomes the brilliance corresponding with the electric voltage exerted on each data wire when the scanning wire is selected in each selecting period. The data wire driving circuit of the display panel exerts the exerting electric voltage which is exerted to N image signal wire corresponding with the data wire of each group to each data wire with the mode of each group, and is exerted to a plurality of data wires in the precharging period which is not repeated with the selected period. The precharging electric voltage generating circuit of the image processing circuit generates N kinds of precharging electric voltage respectively corresponding with the data wire belonging to each group. Various precharging electric voltage in the N precharging electric voltages generated by the precharging electric voltage generating circuit in the precharging period by the selector is selected and is supplied to each image signal wire without complicated modification to the image signal for preventing the displaying nonuniformity.

Description

technical field [0001] The present invention relates to an electro-optical device using an electro-optic material such as liquid crystal, and particularly relates to a technique for precharging each data line before applying a voltage corresponding to a grayscale to pixels arranged corresponding to intersections of scanning lines and data lines. Background technique [0002] In an electro-optical device such as a liquid crystal device, a configuration has been proposed in which an image signal supplied to each of a plurality of image signal lines is sampled on each data line and applied to each pixel. According to this structure, due to various factors such as the difference in electrical characteristics (such as resistance value) of each image signal line routed on the substrate, it is assumed that each pixel should display a common gray scale, but in fact it will also vary depending on the display. The gradation of the display is different in the entire lateral direction (...

AI Technical Summary

Problems solved by technology

In this case, since the difference between the gradation of pixels in one column corresponding to the data line located at the end of each group and the original gradation is larger than that of pixels corresponding to other data lines, there is often A vertical line (the direction in which the data line extends) appears on the boundary of the group and the display becomes uneven

[0003] However, with this structure, in addition to the processing of expanding the image signal of one system into N phases and then extending it by N times on the time axis, or the processing of alternately inverting the polarity of the image signal and appropriately amplifying it, etc. In addition, processing for correcting image signals is required to prevent display unevenness, so there are problems in circuits that perform these processing that complicate the circuit structure or increase the scale of the circuit.

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