Patent ID: 7091669

Claim:
A light-emitting panel comprising: a data line transferring a data signal; a scan line transferring a scan signal; a voltage applying line applying potential difference, the voltage applying line having first and second ends, the first end being electrically connected to an external power supply; a switching device having a first electrode, a second electrode and a third electrode, the first electrode being electrically connected to the data line, the second electrode being electrically connected to the scan line, the third electrode outputting the data signal; a light-emitting device having a fourth electrode and a fifth electrode, the fourth electrode being electrically connected to a reference voltage, an amount of a light generated from the light-emitting device having a relation to an amount of a density of a current applied to the light-emitting device; and a driving device having a sixth electrode, a seventh electrode and an eighth electrode, the sixth electrode being electrically connected to the fifth electrode, the seventh electrode being electrically connected to the voltage applying line, the eighth electrode being electrically connected to the third electrode to receive the data signal, wherein a maximum voltage drop of the voltage applying line is smaller than the voltage difference per unit gray scale.