Patent ID: 7898508

Claim:
A light emitting device comprising: data lines disposed in a first direction; scan lines disposed in a second direction different from the first direction; a plurality of pixels formed in a cross area of the data lines and the scan lines; a discharging circuit configured to provide output voltages corresponding to data of M (integer of above 2) bit to the data lines so that the data lines have discharge voltages corresponding to cathode voltage of pixel related to the data lines, wherein the discharging circuit includes: a sub-discharging circuit configured to provide the output voltages to the data lines; and a discharging level circuit configured to have switches for switching couple between the sub-discharging circuit and the data lines, wherein the discharging level circuit includes: first switches configured to couple the data lines to the sub-discharging circuit during a first sub-discharging time of a discharging time and second switches configured to couple the data lines to the sub-discharging circuit during a second sub-discharging time of the discharging time, and wherein resistors between the data lines have first resistances when the first switches couple the sub-discharging circuit to the data lines, and resistors between the data lines have second resistances different from the first resistances when the second switches couple the sub-discharging circuit to the data lines.