Surface-emitting display device

A method of adjusting unevenness of brightness in a surface-emitting display device, comprising:

• providing a plurality of power supply lines, each power supply line having two ends;
• providing a plurality of pixel circuits, each connected to a corresponding one of the plurality of power supply lines, the plurality of pixel circuits including a plurality of first-direction pixel circuits that are arranged in a first direction substantially perpendicular to a direction along which the plurality of power supply lines extend;
• providing a power supply bus, and electrically connecting the power supply bus to a power supply terminal and the two ends of each of the plurality of power supply lines, so as to conduct current from the power supply terminal to the plurality of power supply lines, the power supply bus having
• a plurality of slits that are formed on a portion of the power supply bus perpendicular to the power supply lines, thereby dividing the power supply bus into a plurality of portions, a number of the slits and widths and lengths of the portions of the power supply bus determining potentials of the ends of the plurality of power supply lines, and
• a first cutout portion and a second cutout portion that are positioned next to each other to form an L-shape cutout, the first cutout portion being formed between the plurality of power supply lines and the plurality of slits, the second cutout portion being substantially perpendicular to the first cutout portion and connecting the first cutout portion to an outside of the power supply bus, to thereby form first and second edges on the power supply bus, the second cutout portion being so positioned that all of the plurality of power supply lines being on a same side of the first edge, the plurality of slits each having an end that is aligned with the second edge of the power supply bus;
• and
• with a control circuit, correcting current to be supplied to each of a plurality of first-direction pixel circuits according to a distance between a connection portion of said each first-direction pixel circuit to its corresponding power supply line and one end of the corresponding power supply line.

A surface-emitting display device, comprising:

• a plurality of power supply lines each having two ends;
• a plurality of pixel circuits, each connected to a corresponding one of the plurality of power supply lines;
• a connection line connecting an adjacent pair of the plurality of power supply lines;
• and
• a power supply bus electrically connected to a power supply terminal and the two ends of each of the plurality of power supply lines, so as to conduct current from the power supply terminal to the plurality of power supply lines, the power supply bus having
• a plurality of slits that are formed on a portion of the power supply bus perpendicular to the power supply lines, and
• a first cutout portion and a second cutout portion that are positioned next to each other to form an L-shape cutout, the first cutout portion being formed between the plurality of power supply lines and the plurality of slits, the second cutout portion being substantially perpendicular to the first cutout portion and connecting the first cutout portion to an outside of the power supply bus, to thereby form first and second edges on the power supply bus, the second cutout portion being so positioned that all of the plurality of power supply lines being on a same side of the first edge, wherein
• at least two of the plurality of slits have a closed perimeter within the power supply bus,
• of any two of the at least two slits having the closed perimeter, the one farther from the power supply lines has a greater length, and
• the plurality of slits each have an end that is aligned with the second edge of the power supply bus.