The invention belongs to the technical field of lighting device or its
system functional characteristics or parts thereof, and particularly discloses a special-shaped display screen and backlight plate thereof. The special-shaped display screen and backlight plate thereof comprises a frame, wherein the frame is provided with a reflector, a
light guide plate, a lower diffuser, a lower
prism, an upper
prism, an upper diffuser and a
liquid crystal panel are arranged from bottom to top. A protective glass is fixedly arranged on the upper end surface of the frame, a gap is reserved between the protective glass and the
liquid crystal panel, a
light emitting diode is arranged between the
light guide plate and the frame, a heat absorption
pipe is arranged in the frame, a heat dissipation
pipe is arranged on the outer wall of the frame, a first liquid inlet
pipe and a first liquid outlet pipe are arranged between the heat dissipation pipe and the heat absorption pipe, a
heat supply pipe is arranged in the frame, a second liquid inlet pipe is arranged between the
heat supply pipe and the heat dissipation pipe, a second liquid outlet pipe is arranged between the
heat supply pipe and the heatabsorption pipe, a
liquid medium is filled in the heat
radiation pipe, the heat absorption pipe and the heat supply pipe, and a driving mechanism is arranged in the heat dissipation pipe. The purposeof the special-shaped display screen and backlight plate thereof is to solve the problem that water mist can hardly be removed due to the small gap after the
water vapor enters the gap between the protective glass and the
liquid crystal panel.