This is a type of screen blur. The reasons and solutions for the blurred screen are as follows:
1. The iPad cable is broken, that is, the cable connecting the screen and the motherboard is burned. If it's broken or the contact is bad, just go to the after-sales store to replace it.
2. The screen is broken and needs to be replaced, which is expensive.
3. The motherboard is broken. The probability is relatively small, but it is not ruled out. The solution is to replace the motherboard. You can get Apple after-sales service.
4. If it is still within the warranty period, free warranty can be provided for non-human reasons.