Pixel circuit in an electroluminescent display

An electroluminescent (EL) display, comprising:

• an array of pixel units, each of the pixel units comprising:
• an EL device;
• a transistor including a gate coupled to a first node and a first terminal coupled to a second node;
• a first capacitor, coupled between a supply voltage and the first node;
• and
• a second capacitor, coupled between the first node and the second node,
• wherein the first capacitor and the second capacitor are configured to establish a compensation voltage associated with a threshold voltage of the transistor at the gate of the transistor in response to a first control signal, and establish the compensation voltage at the first terminal of the transistor in response to a second control signal, and
• wherein the transistor is configured to pass a current through the EL device, the current having a magnitude being independent of the threshold voltage of the transistor.

A method of voltage compensation in an electroluminescent (EL) display that comprises an array of pixel units each including an EL device, a transistor, a first capacitor and a second capacitor, and the transistor includes a gate coupled to a first node and a first terminal coupled to a second node, the first capacitor couples between a supply voltage and the first node, and the second capacitor couples between the first node and the second node, the method comprising:

• establishing a compensation voltage associated with a threshold voltage of the transistor at a first terminal of the transistor in response to a first control signal;
• establishing the compensation voltage at a gate of the transistor in response to a second control signal;
• storing data associated with the EL device in the first and second capacitors in response to a third control signal;
• and
• passing a current through the EL device via a first transistor and a fourth transistor in response to a third control signal and a fourth control signal, respectively, the current having a magnitude independent of the threshold voltage the transistor;
• wherein the array of pixel units includes a first pixel unit on an (N−1)-th row of the array and a second pixel unit on an N-th row of the array and immediately adjacent to the first pixel unit, N being a natural number, further comprising:
• using the fourth control signal provided to the first pixel unit as the third control signal for the second pixel unit.