Method of driving display element and its driving device

Claim 3

The method of driving a display element according to claim 1, wherein the number L of the simultaneously selected row electrodes satisfies L=2.sup.p -1, where p is an integer greater than 1.

Claim 4

The method of driving a display element according to claim 1, wherein the display element is a liquid crystal display element.

Claim 5

The method of driving a display element according to claim 3, wherein selected pulses are dispersingly applied on the row electrodes in the single display cycle to whereby prevent relaxation phenomena of a liquid crystal.

Claim 6

The method of driving a display element according to claim 3, wherein V d1 ,n and V d2 ,n are dispersingly applied on the column electrodes in two display cycles to thereby prevent relaxation phenomena of a liquid crystal.

Claim 7

A driving device of a display element for 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 by dividing row electrodes into a plurality of row electrode subgroups composed of L row electrodes which are selected simultaneously wherein L is an integer greater than 1; wherein a column signal generating device in the driving device comprises the following elements to provide a predetermined gray shade level d.sub.(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 k-th column where k is an integer and an i-th row where i is an integer of 1 through L of a j-th row electrode subgroup where j is an integer: (1) a first function generating means for generating a first function of F.sub.i1 =d.sub.(j·L+i),k +(1-d.sub.(j·L+i),k.sup.2).sup. 1/2 ( 6) with respect to a display data d.sub.(j·L+i),k corresponding to a predetermined gray shade level; (2) a second function generating means for generating a second function of F.sub.i2 =d.sub.(j·L+i),k -(1-d.sub.(j·L+i),k.sup.2).sup. 1/2 ( 7) by inputting the display data d.sub.(j·L+i),k corresponding to a predetermined gray shade level; (3) a sign determining means for determining signs of F i1 and F i2 in accordance with an orthogonal function signal {α mn } where α mn is an element of a m-th row component and a n-th column component of an orthogonal matrix, m is an integer of 1 through L and n is an suffix showing that the n-th column component of the orthogonal matrix corresponds to a n-th selection signal in a single display cycle; (4) a switching means for switching outputs of the first and the second function determining means of which signs are to be determined by the sign determining means at a predetermined timing; and (5) an adding means for adding F i1 and F i2 of which signs have been determined by the sign determining means.

Claim 8

A driving device of a display element for 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 by dividing row electrodes into a plurality of row electrode subgroups composed of L row electrodes which are selected simultaneously wherein L is an integer greater than 1; wherein a column signal generating device in the driving device comprises the following elements to provide a predetermined gray shade level d.sub.(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 k-th column where k is an integer and an i-th row where i is an integer of 1 through L of a j-th row electrode subgroup where j is an integer: (1) a first function generating means for generating a first function of F.sub.i1 =d.sub.(j·L+i),k +(1-d.sub.(j·L+i),k.sup.2).sup. 1/2 ( 6) with respect to a display data d.sub.(j·L+i),k corresponding to a predetermined gray shade level; (2) a second function generating means for generating a second function of F.sub.i2 =d.sub.(j·L+i),k -(1-d.sub.(j·L+i),k.sup.2).sup. 1/2 ( 7) by inputting the display data d.sub.(j·L+i),k corresponding to a predetermined gray shade level; (3) a sign determining means for determining signs of F i1 and F i2 in accordance with an orthogonal function signal {α mn } where α mn is an element of a m-th row component and a n-th column component of an orthogonal matrix, m is an integer of 1 through L and n is an suffix showing that the n-th column component of the orthogonal matrix corresponds to a n-th selection signal in a single display cycle; (4) a switching means for switching outputs of the first and the second function determining means of which signs are to be determined by the sign determining means at a predetermined timing; and (5) an adding means for adding F i1 and F i2 of which signs have been determined by the sign determining means.

Claim 9

The driving device of a display element according to claim 6, wherein the first or the second function generating means is constructed by random logic gates and the switching means is constructed by an AND-OR gate.

Claim 10

The driving device of a display element according to claim 6, wherein the first or the second function generating means is constructed by storing a result of calculation corresponding to a predetermined gray shade level into a ROM and the switching means is constructed by a means for switching an address with respect to the ROM in reading.

Claim 11

The driving device of a display element according to claim 6, wherein the display element is a liquid crystal display element.

Claim 12

A display device 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, comprising: (1) a row signal generating device generating substantially orthogonal signals which are applied on L row electrodes simultaneously wherein L is an integer greater than 1; and (2) a column signal generating device which comprises: the following elements to provide a predetermined gray shade level d.sub.(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 k-th column where k is an integer and an i-th row where i is an integer of 1 through L of a j-th row electrode subgroup where j is an integer: (i) a first function generating means for generating a first function of F.sub.i1 =d.sub.(j·L+i),k +(1-d.sub.(j·L+i),k.sup.2).sup. 1/2 ( 6) with respect to a display data d.sub.(j·L+i),k corresponding to a predetermined gray shade level; (ii) a second function generating means for generating a second function of F.sub.i2 =d.sub.(j·L+i),k -(1-d.sub.(j·L+i),k.sup.2).sup. 1/2 ( 7) by inputting the display data d.sub.(j·L+i),k corresponding to a predetermined gray shade level; (iii) a sign determining means for determining signs of F i1 and F i2 in accordance with an orthogonal function signal {α mn } where α mn is an element of a m-th row component and a n-th column component of an orthogonal matrix, m is an integer of 1 through L and n is a suffix showing that the n-th column component of the orthogonal matrix corresponds to a n-th selection signal in a single display cycle; (iv) a switching means for switching outputs of the first and the second function determining means of which signs are to be determined by the sign determining means at a predetermined timing; and (v) an adding means for adding F i1 and F i2 of which signs have been determined by the sign determining means.

Claim 13

A display device 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, comprising: (1) a row signal generating device generating substantially orthogonal signals which are applied on L row electrodes simultaneously wherein L is an integer greater than 1; and (2) a column signal generating device which comprises: the following elements to provide a predetermined gray shade level d.sub.(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 k-th column where k is an integer and an i-th row where i is an integer of 1 through L of a j-th row electrode subgroup where j is an integer: (i) a first function generating means for generating a first function of F.sub.i1 =d.sub.(j·L+i),k +(1-d.sub.(j·L+i),k.sup.2).sup. 1/2 ( 6) with respect to a display data d.sub.(j·L+i),k corresponding to a predetermined gray shade level; (ii) a second function generating means for generating a second function of F.sub.i2 =d.sub.(j·L+i),k -(1-d.sub.(j·L+i),k.sup.2).sup. 1/2 ( 7) by inputting the display data d.sub.(j·L+i),k corresponding to a predetermined gray shade level; (iii) a sign determining means for determining signs of F i1 and F i2 in accordance with an orthogonal function signal {α mn } where α mn is an element of a m-th row component and a n-th column component of an orthogonal matrix, m is an integer of 1 through L and n is a suffix showing that the n-th column component of the orthogonal matrix corresponds to a n-th selection signal in a single display cycle; (iv) a switching means for switching outputs of the first and the second function determining means of which signs are to be determined by the sign determining means at a predetermined timing; and (v) an adding means for adding F i1 and F i2 of which signs have been determined by the sign determining means.