Patent ID: 7405711

Claim:
A fixed pixel display device provided with a multiple number M (M≧2) of stripe-shaped scanning electrodes extending in a first direction and another multiple number N(N≧2) of stripe-shaped data electrodes extending in a second direction different from said first direction such that light-emitting regions formed of overlap regions of said scanning electrodes and said data electrodes are arrayed in a two-dimensional matrix form of M rows×N columns, wherein: said fixed pixel display device is provided with actuation drivers connected to the respective data electrodes to actuate said data electrodes; each said actuation driver comprises a switching circuit, an output circuit, and a subtraction circuit; said switching circuit is provided with: (A) a first switching circuit for applying a first voltage V 1 to the corresponding data electrode, (B) a second switching circuit for applying a second voltage V 2 (V 2 ≠V 1 ) to the corresponding data electrodes, and (C) a comparator for performing on/off control of said first switching circuit and second switching circuit; a voltage, outputted from said output circuit on a basis of a value D m,n (m: any one of 2, 3, . . . , M; n: 1, 2, . . . , N) of data for controlling states of light emission at a multiple number N of light-emitting regions formed of the scanning electrode in an m th row, is applied for a fixed duration to the data electrode in an n th column; and a value (D m,n −D m−1,n ), obtained by subtracting at said subtraction circuit a value (D m−1,n ) of data for controlling states of light emission at respective light-emitting regions formed of the scanning electrode in an (m −1 ) th row from a value (D m,n ) of data for controlling states of light emission at respective light-emitting regions formed of said scanning electrode in said m th row, is inputted as an input value in said comparator, and said input value, inputted in said comparator, is compared with a first reference value and a second reference value at said comparator; (1) when said input value is not smaller than said first reference value, said first switching circuit is maintained in an ON state for a predetermined duration shorter than said fixed duration on a basis of an output from said comparator such that during said predetermined duration, a first voltage V 1 is applied to the data electrode in said n th column; (2) when said input value is not greater than said second reference value, said second switching circuit is maintained in an ON state for a predetermined duration shorter than said fixed duration on a basis of said output from said comparator such that during said predetermined duration, a second voltage V 2 is applied to the data electrode in said n th column; and (3) when said input value is smaller than said first reference value but is greater than said second reference value, said first switching circuit and said second switching circuit are maintained in OFF-states, respectively.