The minimum distance you should sit from a 65 inch TV depends on the screen resolution and your personal preferences. Here are some general guidelines based on the most common screen resolutions:
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For a 1080p resolution (Full HD), the minimum viewing distance is about 8.1 feet (2.47 meters).
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For a 4K resolution (Ultra HD), the minimum viewing distance is about 5.4 feet (1.65 meters).
However, keep in mind that these are just general guidelines and your personal preferences and room layout may affect the ideal viewing distance. Some people prefer to sit closer or farther away from the screen based on their visual acuity, room size, and viewing habits.
In general, you should aim to sit far enough away from the screen to avoid eye strain and fatigue, but close enough to enjoy the full detail and immersion of the content. A good rule of thumb is to sit at a distance where the TV's edges are just out of your peripheral vision.