Liquid crystal matrix display device
AssigneeSeikosha Co., Ltd.
InventorsShingo Takahashi, Seiji Sanada, Sakae Tanaka, Kazuya Umeyama
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Abstract
The present invention comprises a selective supply of image signals and a desired direct current potential to picture elements during each period of field scanning, whereby flickering and shading unevenness are prevented.
Claims13
In a liquid crystal display panel for performing a display during each field scanning period by sequentially supplying image signals to picture elements which are arranged in a matrix on said display panel, the improvement comprising:
- scanning means for scanning said picture elements twice during one field scanning period;
- and a control circuit for selectively supplying said image signals and a desired direct current potential to said picture elements to drive said picture elements twice during each field scanning period.
In a display apparatus having a plurality of picture elements arranged in a matrix of rows and columns and driven to display one picture during one field period in response to an image signal, the improvement comprising:
- scanning means connected to the rows of picture elements for scanning the same twice during one field period to thereby select each row of picture elements twice at two different assigned timings;
- and driving means connected to the columns of picture elements and operative to sequentially apply the image signal to each row of picture elements when selected at one of the two different assigned timings for driving the matrix of picture elements to display one picture during one field period and operative to sequentially apply a predetermined signal to each row of picture elements when selected at the other of the two different assigned timings for driving the matrix of picture elements during the same field period according to the predetermined signal so that the matrix of picture elements is driven twice during one field period according to the image signal and the predetermined signal to thereby prevent flickering of pictures displayed during successive field periods.
A method of driving a display apparatus having a plurality of picture elements arranged in a matrix of rows and columns and driven to display one picture during one field period in response to an image signal, the method comprising the steps of:
- scanning the rows of picture elements twice during one field period to thereby select each row of picture elements twice at two different timings;
- sequentially applying the image signal to each row of picture elements when selected at one of the two different timings assigned thereto to drive the matrix of picture elements to thereby display one picture during one field period;
- and sequentially applying a predetermined signal to each row of picture elements when selected at the other of the two different timings assigned thereto to drive the matrix of picture elements during the same field period according to the predetermined signal.
Dependencies are inferred from the claim text.