| 摘要 |
PURPOSE: An LED(Light Emitting Diode) internal lighting cell type road sign for preventing dew condensation is provided to prevent the occurrence of a dark portion on the road sign, thereby facilitating the identification of the road sign for a driver. CONSTITUTION: An LED internal lighting cell type road sign(100) for preventing dew condensation comprises a fixing frame(10), a transparent protecting plate(20), a road sign sheet(30), a first hollow frame(40), a luminous board(50), a light spreading part(60), a reflection sheet(70), a rear protecting plate(80), and an air vent(90). The transparent protecting plate is inserted into a receiving part(11) and placed on a hitch projection(12) in the fixing frame. The road sign sheet is attached to the front of the transparent protecting plate and stuck to the hitch projection. The first hollow frame is closely installed at the rear of the transparent protecting plate for forming a first space(41) in the receiving part of the fixing frame. The luminous board is isolatedly placed in the rear of the first hollow frame and equipped with LED(51) and a first through hole(53). The light spreading part is closely installed between the first hollow frame and the luminous board. The light spreading part prevents the occurrence of the dark portion on the road sign sheet by widely spreading the emitted light of the LED. The reflection sheet is attached to the rear of the luminous board for enhancing luminance efficiency and equipped with a third through hole(71) corresponding to the first through hole. The rear protecting plate protects the transparent protecting board, the luminous board, and the light spreading part. The rear protecting plate is isolatedly placed in the rear of the reflection sheet and equipped with a plurality of fourth through holes(85). The air vent is coupled to the fourth through hole of the rear protection plate.
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