广告牌掉落监控
⑴Will there be flicker when the billboard power supply is used in surveillance?
Will there be stroboscopic phenomenon when the billboard power supply is used in surveillance?
Billboards use PWM dimming technology for brightness adjustment, which can cause stroboscopic problems when the exposure time is short. The lighting methods of equipment such as LED digital tubes and display screens are basically dynamic scanning, that is, all the content that needs to be displayed cannot be lit instantly. There is a concept of scanning cycle. The camera defaults to automatic exposure + progressive exposure. When the ambient brightness is very high, it will weigh the gain and shutter time to ensure the picture effect. When the shutter is lowered very low, black stripes or LEDs will appear in every frame of the picture. Flickering and other phenomena.
Billboards use PWM dimming technology for brightness adjustment, which can cause stroboscopic problems when the exposure time is short. The lighting methods of equipment such as LED digital tubes and display screens are basically dynamic scanning, that is, all the content that needs to be displayed cannot be lit instantly. There is a concept of scanning cycle. The camera defaults to automatic exposure + progressive exposure. When the ambient brightness is very high, it will weigh the gain and shutter time to ensure the picture effect. When the shutter is lowered very low, black stripes or LEDs will appear in every frame of the picture. Flickering and other phenomena.
If it is a legal billboard. You can call the police because the other party is suspected of committing a crime of damaging public and private finances.