Backlight module transmitting electricity through magnetic field induction

摘要

A backlight module is provided, which includes a first coil, a first driving circuit, a second coil, a rectifying circuit and a light emitting unit. The first driving circuit is electrically connected to the first coil for controlling the first coil to produce a first magnetic field. The second coil is disposed on a transmission direction of the first magnetic field corresponding to the first coil for receiving the first magnetic field and providing a first induction voltage according to the first magnetic field. The rectifying circuit is electrically connected to the second coil for converting the first induction voltage into a first driving voltage. The light emitting unit is electrically connected to the rectifying circuit to provide a backlight according to the first driving voltage.

主权项

1. A backlight module, comprising:
a first coil; a first driving circuit, electrically connected to the first coil for controlling the first coil to produce a first magnetic field; a second coil, configured to receive the first magnetic field and providing a first induction voltage according to the first magnetic field; a rectifying circuit, electrically connected to the second coil for converting the first induction voltage into a first driving voltage; a light emitting unit, electrically connected to the rectifying circuit to provide a backlight according to the first driving voltage; and a first substrate having a first surface and a second surface opposite to the first surface, wherein the first coil and the first driving circuit are disposed at a side of the first substrate the same as the first surface, and the second coil, the rectifying circuit and the light emitting unit are disposed at another side of the first substrate the same as the second surface, wherein the light emitting unit comprises a light emitting diode light bar, and the second coil is disposed at a second substrate of the light emitting diode light bar.