Backlit road traffic sign

1 . A backlit road traffic sign, comprising a housing body, a control box, a main light-emitting device, and multiple warning light devices;

wherein the housing body is configured as a flat structure and comprises a frame, a rear panel, a front panel, a light-blocking film, a reflective base film, and a reflective pattern film; wherein the rear panel is positioned on the rear side of the frame;

wherein the front panel is made of light-transmitting material and positioned on the front side of the frame, with the front panel, the rear panel, and the frame collectively enclosing a sealed cavity; wherein the light-blocking film is made of non-light-transmitting material and attached to the back surface of the front panel, with multiple first through holes and multiple first slot holes for forming patterns formed through a front surface and a back surface of the light-blocking film, the multiple first through holes arranged around a periphery of the light-blocking film;

wherein the reflective base film is made of a light-transmitting material and attached to a front surface of the front panel; wherein the reflective pattern film is made of a light-transmitting material and attached to a front surface of the reflective base film, with multiple second through holes and multiple second slot holes for forming patterns formed through a front surface and a rear surface of the reflective pattern film, the multiple second through holes arranged around a periphery of the reflective pattern film;

wherein the control box is mounted on a back surface of the rear panel;

wherein the main light-emitting device is disposed within the sealed cavity and electrically connected to the control box, light emitted from the main light-emitting device projected outward through the multiple first slot holes, the front panel, the reflective base film, and the multiple second slot holes sequentially;

wherein the multiple warning light devices are arranged around the periphery of the sealed cavity and electrically connected to the control box, light emitted from the warning light devices projected outward through the corresponding first through holes, the front panel, the reflective base film, and corresponding second through holes.

2 . The backlit road traffic sign of claim 1 , wherein the main light-emitting device comprises a heat sink, a light guide plate, and a light strip, and the heat sink forms a side-opening slot; wherein a front surface of the light guide plate is a light-emitting surface, and the light-emitting surface faces the back surface of the light-blocking film, with an end of the light guide plate engaging with the side-opening slot; wherein the light strip is embedded in the side-opening slot and attached to the heat sink, and electrically connected to the control box, carrying multiple first light beads, the multiple first light beads arranged at intervals along a length of the light strip and facing an end face of the light guide plate.

3 . The backlit road traffic sign of claim 2 , wherein a count of the heat sinks is two and the two heat sinks are symmetrically disposed at two ends of the light guide plate, with the two ends of the light guide plate respectively engaged with the side-opening slots of the two heat sinks; correspondingly, a count of the light strips is two and the two light strips are embedded in the side-opening slots of the heat sinks respectively and attached to the two heat sinks; wherein the two light strips are electrically connected to the control box, and the multiple first light beads on each light strip face the two end faces of the light guide plate respectively.

4 . The backlit road traffic sign of claim 2 , wherein a reflective paper is attached to the back surface of the light guide plate.

5 . The backlit road traffic sign of claim 2 , wherein the heat sink is an elongated aluminum profile.

6 . The backlit road traffic sign of claim 1 , wherein the warning light device comprises a light panel and a light shield, wherein the light panel, comprising the multiple second light beads, is attached to the rear panel and electrically connected to the control box; wherein the light shield is fixed to the light panel and defines light-emitting holes positioned directly above the multiple second light beads, with each light-emitting hole aligned with the corresponding first through hole.

7 . The backlit road traffic sign of claim 1 , wherein the frame is an aluminum frame, and wherein the rear panel is an aluminum plate.

8 . The backlit road traffic sign of claim 1 , wherein a mounting rail is fixed to the back surface of the rear panel.

9 . The backlit road traffic sign of claim 8 , wherein the mounting rails are two symmetrically arranged rails.

10 . The backlit road traffic sign of claim 1 , wherein a solar photovoltaic panel is attached to the front surface of the reflective pattern film and electrically connected to the control box, with multiple third through holes and multiple third slot holes for forming patterns formed through a front surface and a back surface of the solar photovoltaic panel; wherein the multiple third through holes are arranged around the periphery of the solar photovoltaic panel and respectively aligned with and in communication with the multiple second through holes, and wherein the multiple third slot holes are respectively aligned with and in communication with the multiple second slot holes.