| 摘要 |
PROBLEM TO BE SOLVED: To achieve effective natural cooling mechanism for an LED display that is suspended in a station or the like. SOLUTION: In this LED display, a plurality of open holes 8 for discharging air in a case 14 to the outside are provided in an upper lid 4, an upper plate 23 is provided at a lower part so that an air passage 6 is formed at a part to the upper lid 4, and at the same time, a plate-shaped shielding member 7 having a plurality of ventilation holes 9 is mounted between the upper plate 23 and upper lid 4. Since the plate-shaped shielding member 7 having the plurality of ventilation holes 9 are provided in the air passage 6, the entering of dust from the outside to the inside of the case 14 is suppressed, and a built-in LED or the like is cooled by discharging cooled air from the lower port, thus prolonging the device life.
|
