| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine capable of enhancing the presentation effect with illumination, and reducing the power consumption of a display lamp. SOLUTION: An illumination display part 40 comprises a plurality of PWM-controllable LEDs, which are mounted on LED boards 41b, 42c, ..., 47b. A CPU of a presentation control board 80 lights the LEDs at a prescribed grade of luminance selected from a plurality of grades of luminance gradation by retaining the pulse period at a constant value and PWM-controlling the LEDs with a prescribed duty ratio. Accordingly, the presentation display with the LEDs can be executed at the appropriate luminance corresponding to the use situation of the game machine. If the LEDs are PWM-controlled with the duty ratio set at 70%, for example, the power consumption can be reduced while the LEDs are lighted with approximately the same luminance as when the LEDs are simply controlled to be turned on. COPYRIGHT: (C)2007,JPO&INPIT
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