Display apparatus having a threshold voltage and mobility correcting period and method of driving the same
View Patent ↗In a display apparatus, as shown in FIG. 1 , by using a reference signal, a shift register and a logical operation circuit generate a driving signal in periods for correcting a threshold voltage based on a rectangular wave signal. Also by using the reference signal, a write signal in a mobility correcting period is generated by an inverter, a NAND circuit, a level conversion circuit, a buffer circuit, a driving power generating unit, and a low-pass filter including a resistor and a capacitor. The signals are separately generated and are selectively output. Thus, excessive or insufficient mobility correction based on emission brightness can be prevented.
1. A display apparatus comprising:
a pixel section having pixels arranged in a matrix; and
a driving circuit configured to drive the pixel section,
wherein each pixel includes
a light-emitting element,
a capacitor,
a write transistor configured to be turned on and off by a write signal output from the driving circuit, and
a driving transistor having a gate and a source to which ends of the capacitor are connected,
wherein the driving circuit includes
a selective output unit configured to selectively output, to the pixel, the write signal generated by using a pulse signal and the write signal generated by smoothing a rising edge and/or falling edge of the pulse signal, and further comprising a first write signal generating unit configured to generate the write signal during a threshold voltage correcting period and a second write signal generating unit configured to generate the write signal during a mobility correcting period and an output from each of the first and second write signal generating units is selectively applied to the write transistor.
2. The display apparatus according to claim 1 , wherein the write transistor is configured to set a terminal voltage of the capacitor to a signal level, and
wherein a driving transistor having a gate and a source to which ends of the capacitor are connected, the driving transistor configured to cause the light-emitting element to emit light by driving the light-emitting element in accordance with the terminal voltage of the capacitor.