Add a layer of wide-viewing angle compensation film. This compensation film can increase the visual Angle to about 150 degrees, which is a simple and easy method and is widely used in LCD.TN+FILM may not be the best solution for manufacturers, but it is the cheapest solution, so most Taiwanese manufacturers use this method to build 15-inch LCDs. hmi displays for industrial automation https://www.stoneitech.com/
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