US 2006/0232612 A1 · Display device using self-luminous element and driving method of same

Abstract

To provide a current output type semiconductor circuit and a display device which are capable of realizing a reduction in cost by reducing the number of output stages and reducing a chip area. [Solution] A display device includes three reference current generating units 61 which generate reference currents corresponding to three display colors and outputs the reference currents, a selector 471 which outputs an optimum reference current among the outputs of the three reference current generating units 61 according to a display color of display data 473 in response to a changing display color switching signal 475, a current output unit 255 which outputs a current corresponding to a value of the display data 473 with respect to a current per one gradation determined by the reference currents, and a selector 472 for distributing the output of the current output unit 255 to respective source signal lines corresponding to the display color.

Claims24

Dependent claims

A display device using self-luminous elements, comprising:

a reference current output unit which generates a first current adjusted depending on respective luminescent colors of self-luminous elements of a display device and outputs said first current for each of said luminescent colors, said display device being constituted by pixels in which said self-luminous elements are arranged in a matrix and displaying at least two or more colors on the basis of current value control;
plural current output units which convert said first current outputted from said reference current output unit into a second current reflecting information of display gradation data sent from a signal line and output said second current to a display area side;
and
a first selector unit which switches an output destination of said second current outputted from said current output units to respective pixel columns corresponding to said respective luminescent colors,
wherein said reference current output unit outputs said first current in response to switching in said first selector unit.

2 more elements

A driving method for a display device using self-luminous elements, comprising:

a reference current outputting step of generating a first current adjusted depending on respective luminescent colors of self-luminous elements of a display device and outputs said first current for each of the luminescent colors, said display device being constituted by pixels in which said self-luminous elements are arranged in a matrix and displaying at least two or more colors on the basis of current value control;
plural current outputting steps of converting said first current into a second current reflecting information of display gradation data sent from a signal line and outputting said second current to a display area side;
and
a first selecting step of switching an output destination of said second current to respective pixel columns corresponding to said respective luminescent colors,
wherein, in said reference current outputting step, said first current is outputted in response to switching in said first selecting step.

2 more elements

Dependencies are inferred from the claim text.

Display device using self-luminous element and driving method of same

Life of this patent

Display device using self-luminous element and driving method of same

Life of this patent

Abstract

Claims24