Jaffery Watson Mendonsa & Hamilton LLP
Local display backlighting systems and methods
Aspects of the subject technology relate to display of an electronic device. The display includes a backlight unit having a voltage source, a string of light-emitting diodes and a bypass switch for each light-emitting diode in the string. The string of light-emitting diodes can receive, at a first end, a supply voltage from the voltage source. The bypass switch for each light-emitting diode is controllable to pulse-width-modulate that light-emitting diode. The headroom voltage feedback circuit is coupled to a second end of the string.
Apple Inc.
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Yanhui Asif Manisha P. Jingdong
Xie Hussain Pandya Chen