One of the best ways to distinguish IPS hard screen from ordinary screen is to observe it actually. You can look from bottom to top, from left to right, and stand at a position deviating from the central angle, and its contrast and brightness can be seen. IPS hard screen is almost 180 without distortion, and ordinary screen TV will be slightly inferior.
The viewing angle of LCD TV is also called the viewing angle range, which includes two indicators: horizontal viewing angle and vertical viewing angle. Horizontal viewing angle means that the displayed image can still be seen normally at a certain angle on the left or right side of the vertical normal, which is the horizontal viewing angle of LCD TV. Similarly, if the horizontal normal is taken as the standard, the upper and lower viewing angles are called vertical viewing angles. Generally speaking, the measurement of viewing angle is based on the change of contrast. When the viewing angle increases, the contrast of the displayed image in this position will decrease. When the angle increases to a certain extent and the contrast drops below the standard, this angle is the maximum viewing angle of LCD TV.