Patent ID: 7911426

Claim:
A light emitting display comprising: a plurality of scan lines; a plurality of pixel power lines; a plurality of data lines; a pixel portion including a plurality of pixels at regions defined by the plurality of scan lines, the plurality of pixel power lines, and the plurality of data lines; a first power line arranged on a first side of the pixel portion for supplying a driving voltage; a second power line arranged on a second side of the pixel portion for supplying the driving voltage, the second side being opposite to the first side with respect to the pixel portion; a third power line arranged on a third side of the pixel portion for supplying the driving voltage to the plurality of pixel power lines, the third side being different from the first and second sides; a fourth power line arranged on a fourth side of the pixel portion for supplying the driving voltage to the plurality of pixel power lines, the fourth side being opposite to the third side with respect to the pixel portion; a first power connection line electrically connecting the first power line to the third power line through a first electric junction on the third power line; a second power connection line electrically connecting the second power line to the third power line through a second electric junction on the third power line; a third power connection line electrically connecting the first power line to the fourth power line through a third electric junction on the fourth power line; and a fourth power connection line electrically connecting the second power line to the fourth power line through a fourth electric junction on the fourth power line, wherein the driving voltage is provided by an external power supply at a single side, which is the fourth side, of the pixel portion and is first supplied from the external power supply to the first and second power lines, through which the driving voltage is then supplied to the third and fourth power lines, through which the driving voltage is then supplied to the plurality of pixel power lines, through which the driving voltage is then supplied to the pixel portion, and wherein the first, second, third, and fourth power lines and the first, second, third, and fourth power connection lines together comprise a closed loop that encompasses all of the pixels in the pixel portion.