Mobile DevicesCâu 48 / 100
What does a laptop's inverter historically provide power to on older LCD screens?
a.The keyboard backlight
b.The webcam
c.The trackpad
d.The CCFL backlight
Giải thích
On older laptops the inverter supplied high voltage to the cold-cathode fluorescent (CCFL) backlight. Modern LED-backlit panels no longer need an inverter.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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