Patent ID: 8269760

Claim:
A pixel driving device for driving a pixel, connected to a signal line, and comprising a light emitting element, and a pixel drive circuit having a drive transistor for controlling current supplied to the light emitting element with one end of a current path of the drive transistor connected to one terminal of the light emitting element, the pixel drive circuit further having a holding capacity for storing charge by a voltage impressed on a control terminal of the drive transistor, the pixel driving device comprising: a voltage impressing circuit for outputting a reference voltage; a voltage measurement circuit; a switching circuit for switching connection of one end of the signal line, between the voltage impressing circuit and the voltage measurement circuit; and a property parameter acquisition circuit for acquiring property parameters that relate to electrical properties of the pixel; wherein the reference voltage has an electric potential in which an electric potential difference between the one end with respect to the other end of the current path of the drive transistor is a value that exceeds a threshold voltage of the drive transistor; wherein the switching circuit connects the one end of the signal line to the voltage impressing circuit and interrupts the connection between the one end of the signal line and the voltage impressing circuit after impressing the reference voltage for a predetermined time on the one end of the signal line by the voltage impressing circuit, and connects the one end of the signal line to the voltage measurement circuit after a predetermined settling time has elapsed; wherein the voltage measurement circuit acquires a voltage value of the one end of the signal line as a measured voltage when connected to the one end of the signal line by the switching circuit; and wherein the property parameter acquisition circuit acquires the threshold voltage of the drive transistor and a current amplification factor of the pixel drive circuit as the property parameters based on voltage values of a plurality of measured voltages acquired by the voltage measurement circuit for a plurality of settling times which are set to be different from each other.