| 摘要 |
PROBLEM TO BE SOLVED: To make the symbol marks always display beautiful without the color spots appearing in the light with a white LED as a backlight of the reel drum involved in a spin drum type display device used for the game machines such as pachinko game machines and slot machines. SOLUTION: In the spin drum type display device, strip of display film 3 with the symbol marks printed thereon are applied respectively on the reel drums 2a, 2b and 2c made of a light permeable and light diffusive resin material and back lights respectively comprising the white LEDs 9a and 9b are provided respectively inside the reel drums. The strips of display film 3 should be 45 to 85% in the transmittance of the light with the wavelength of 600 nm or more and made bluish. COPYRIGHT: (C)2006,JPO&NCIPI
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