Patent ID: 6930680

Claim:
A pixel circuit for a light emitting element, comprising: a current programming circuit that adjusts a tone of light emission from the light emitting element based on a current value of a current signal supplied via a current signal line by an external current generating circuit, the current programming circuit including: (i) the light emitting element of a current-driven type; (ii) a drive transistor disposed in a current path along which current travels to the light emitting element; (iii) a holding capacitor, connected to a control electrode of the drive transistor, for setting a value of the current that is to flow through the drive transistor by maintaining a charge in accordance with the current value of the current signal supplied from the external current generating circuit; and (iv) a first switching transistor, connected between the holding capacitor and the data line, for controlling whether or not the holding capacitor should be charged using the current signal, and a second switching transistor, connected to the holding capacitor, for controlling whether or not the holding capacitor should be charged using a voltage signal supplied via a voltage signal line by an external voltage generating circuit.