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Ghosting on a video projector refers to a visual artifact that appears as a faint, ghost-like image that trails behind the primary image. It's caused by the projector's slow response time when displaying fast-moving images, such as fast-paced action scenes in movies or fast-moving video games.

There are several reasons why ghosting artifacts may be in the image. Ghosting can be caused by the projector's slow response time, which is the time it takes for a pixel to change from one color to another. Slow response times can cause a "trailing" effect, where a faint image of the previous frame is still visible when the new frame is displayed, resulting in a ghost-like picture trailing behind the primary image.

Other factors that can contribute to ghosting on a projector include low refresh rate, high frame rate content, outside signal interference, and ambient lighting.

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