Apple Inc.

Chieh-Chien Lin

Hopil Bae

Derek Keith Shaeffer

Yafei Bi

Shinya Ono

Mohammad Bagher Vahid Far

Baris Cagdaser

Hasan Akyol

Jesse Aaron Richmond

Zhen Zhang

Xiaofeng Wang

Suoming Zhang

A system may include a display driven using display driving circuitry to present an image via pixels. The display driving circuitry may include a sensor core compatible with one or more strain sensing circuits. The same sensor core may be used by a control system of the display to sense a stress applied to a strained region of a display using a current divider sensing circuit and/or a Wheatstone bridge sensing circuit.

Display circuitry including strain gauge

Methods and devices useful in compensating for Vand Vvariations in a micro light-emitting diode (micro-LED) display are provided. By way of example, an LED driver includes a first transistor having a first source coupled to an upper voltage rail (V), a first gate, and a first drain. The LED driver includes a second transistor having a second source coupled to the first drain of the first transistor, a second gate, and a second drain coupled to the LED. The second transistor is configured to receive the drive current signal from the first transistor and supply the drive current signal to the LED. The LED driver includes compensation circuitry configured to adjust the drive current signal such that the drive current signal is independent of the upper voltage rail (V) and a threshold voltage (V) of the first transistor or the second transistor.

Driving circuitry for micro light emitting diode electronic displays

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San Jose, CA, United States of America

Chieh-Chien Lin