| 摘要 |
A video/audio system for delivering video and audio information, such as news and advertisements, and entertainment to patrons and customers of a petroleum station having a LED visual display and adjacent audio speakers. The LED video display is controlled by a light sensor to vary the brightness of the screen on existing light conditions, such as at night, at bright sunlight conditions, and critical conditions between night and bright sunlight. An audio microphone detects ambient sound levels at the site to control an amplifier and maintain audio output at a predetermined level above ambient noise. The LED screen is optimally arranged to seen by a majority of the customers at the gasoline pumps.
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