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http://hdl.handle.net/2289/3891

Title:  A method of driving display element and its driving device 
Authors:  Kuwata, Takeshi Ruckmongathan, T.N. Nakagawa, Y. Koh, H. Nakazawa, Akira 
Issue Date:  7Apr1999 
Citation:  European Patent EP0581255 B1 
Abstract:  A method of driving a display element wherein a light transmittance of a pixel selected by a row electrode and a column electrode changes in accordance with a difference between voltages applied on the row electrode and the column electrode, which satisfies the following conditions: (1) row electrodes are divided into a plurality of row electrode subgroups composed of L row electrodes which are selected simultaneously wherein L is an integer greater than 1: (2) signals [ alpha mn] where alpha mn is an element of a mth row component and a nth column component of an orthogonal matrix, m is an integer of 1 through L and n is a suffix showing that the nth column component of the orthogonal matrix corresponds to a nth selection signal in a single display cycle are applied on the selected row electrodes as row electrode signals: (3) a signal into which an image signal corresponding to positions of the selected row electrodes on a display panel is converted by the orthogonal function is applied on a column electrode as a column electrode signal: and (4) a first voltage which is in proportion to a second voltage Vd expressed by the following equation is substantially applied to a column voltage to provide a predetermined gray shade level d(j.L+i),k which is a value between 1 showing an off state and 1 showing an on state in accordance with a degree of gray shade with respect to a pixel of a kth column where k is an integer and an ith row where i is an integer of 1 through L of a jth row electrode subgroup where j is an integer: <MATH> where <MATH> where <MATH> indicates a summing operation of a content of [ ] with respect to i=0 through L and alpha in' indicates an element of an ith row component and a nth column component of an orthogonal matrix wherein a 0th row component is added to [ alpha mn]. 
URI:  http://hdl.handle.net/2289/3891 
Alternative Location:  http://www.freepatentsonline.com/EP0581255B1.html 
Appears in Collections:  Patents

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