Apple Inc.

Jason P Marini

Jun Qi

Mingxia Gu

ByoungSuk Kim

Blake R Marshall

Michael B Nussbaum

Li-Quan Tan

Yanming Li

Adrian E Sun

Kerry J Kopp

Kevin J Ryan

Matthew W Cooper

Shmuel G Link

An electronic device may have a display mounted in a housing. The housing may have a stand that supports the housing on a support surface or may have other shapes. The display may have pixels that display an image. The display may also have a two-dimensional array of light-emitting devices such as light-emitting diodes that supply backlight illumination for the pixels. An array of temperature sensors may be overlapped by the pixels. Control circuitry may maintain historical backlight aging information during operation of the display. The aging information may include information on output brightness levels of the light-emitting diodes and light-emitting diode operating temperatures.

Electronic devices with backlit displays

Input device power consumption can be reduced with a magnetic drive system. In some examples, the input device can include a transformer configured to generate a desired high output voltage from logic-level input pulses. In some examples, the distributed capacitance and associated resonance of the transformer can act as a low-pass filter, and can create a relatively clean output waveform from input logic signal waveforms. In some examples, the transformer can be an autotransformer. In some examples, to stabilize an amplitude of the output by sampling the output of the transformer and adjusting the input to the transformer based on the sampled output.

Touch sensor excitation using transformer

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Morgan Hill, CA, United States of America

Jason P Marini