Liquid crystal display apparatus and method of driving the same
AssigneeCanon Kabushiki Kaisha
InventorSeiji Hashimoto
Life of this patent
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Abstract
A liquid-crystal display apparatus which improves horizontal and vertical resolutions and is capable of displaying a high-quality image free from flicker is provided. Pixels of each color are arranged in a delta form, color selected from the pixels of each color is connected to a column data line, at least one memory circuit is disposed in correspondence with the selected color, and image information is supplied to each pixel in such a way that the image information is distributed to the upper and lower portions of the column data line.
Claims8
A liquid-crystal display apparatus, comprising:
- a plurality of pixels, arranged in a matrix form having a plurality of pixel rows, each pixel having a switching element;
- a plurality of data lines coupled to the pixel rows by the switching elements;
- a vertical scanning circuit for selecting a row of said pixels;
- first writing means, including a first horizontal scanning circuit for generating a first signal used to sample an image signal to be supplied to said pixels, connected to a side of the plurality of data lines;
- a second horizontal scanning circuit for generating a second signal used to sample an image signal to be supplied to said pixels, connected to an opposite side of the plurality of data lines;
- and
- second writing means having storing means for storing image signals sampled by said second horizontal scanning circuit,
- wherein said first writing means consecutively supplies the image signals directly to the data lines without intermediate storage of the image signals in a T.sub.2 period of every horizontal scanning period (1H period), and said second writing means consecutively supplies the image signals to said storing means in said T.sub.2 period so that the image signals are stored by said storing means and then supplied to the data lines when said T.sub.2 period is terminated.
A method of driving a liquid-crystal display apparatus comprising a plurality of pixels, arranged in a matrix form, each of which having a switching element, the pixels being arranged in a plurality of rows, a plurality of data lines coupled to the pixel rows by the switching elements, a first horizontal scanning circuit connected to a side of the plurality of data lines, for generating a first signal used to sample an image signal to be supplied to the pixels, a second horizontal scanning circuit, connected to an opposite side of the plurality of data lines, for generating a second signal used to sample an image signal to be supplied to the pixels, storing means, for storing image signals sampled by the second horizontal scanning circuit, and a vertical scanning circuit for selecting a row of the pixels, said method comprising the steps of:
- (a) directly writing the image signals sampled by the first horizontal scanning circuit to a first row of the plurality of rows of the pixels without intermediate storage;
- (b) storing, in the storing means, the image signals sampled by the second horizontal scanning circuit;
- and
- (c) writing the stored image signal to a row of the pixels adjacent to the first row.
Dependencies are inferred from the claim text.