Pixel circuits for amoled displays

A method of determining a value of a characteristic of an OLED of a first pixel in an array of pixels in a display in which each pixel includes a drive transistor coupling a supply voltage to an OLED for controlling a supply of current to the OLED, said first pixel being one of a pair of pixels, said display system including a monitor line controllably coupled to said pair of pixels, said method comprising:

• measuring at least one voltage or current over the monitor line generating one or more measurements, said one or more measurements comprising:
• first at least one measurements including an effect of a second pixel of the pair of pixels on the at least one voltage or current;
• and
• second at least one measurements including an effect of the characteristic of the OLED of the first pixel on the at least one voltage or current;
• and
• determining the value of the characteristic of the OLED of the first pixel with use of the first and second at least one measurements.

A system for determining a value of a characteristic of an OLED of a first pixel in an array of pixels in a display in which each pixel includes a drive transistor coupling a supply voltage to an OLED for controlling a supply of current to the OLED, said first pixel being one of a pair of pixels, said display system including a monitor line controllably coupled to said pair of pixels, said system comprising a controller adapted to:

• measure at least one voltage or current over the monitor line generating one or more measurements, said one or more measurements comprising:
• first at least one measurements including an effect of a second pixel of the pair of pixels on the at least one voltage or current;
• and
• second at least one measurements including an effect of the characteristic of the OLED of the first pixel on the at least one voltage or current;
• and
• determine the value of the characteristic of the OLED of the first pixel with use of the first and second at least one measurements.