There are many ways to arrange the LCD, so there will be TN screen, IPS screen and so on. Which is easy to produce water ripple is the TN type, but also the principle of most of the soft screen. Imagine that the liquid crystal is a long stick, which is mainly a change in the tilt angle with respect to the vertical direction to change the gray level. Pressing a certain amount of force at this time will change the larger value of the angle of inclination.
Why the legendary IPS hard screen is not easy to appear water ripple because his liquid crystal arrangement is relative to the horizontal tilt angle changes to change the gray level. At this time, the vertical direction presses a certain degree of force, and the effect of changing the inclination angle is small. At the same time, this arrangement of liquid crystals recovers much faster than TN, so it is very easy to return to normal.
What needs to be emphasized here is that it is not mainly because of the hard screen. The glass is very hard, so it seems that it is more difficult for water ripples to appear when the glass is pressed. But because of this kind of liquid crystal arrangement method, the electric field direction of the control liquid crystal is different, IPS has such ability to use the hard glass screen, but TN type can't use.
Why can't TN-type LCDs use hard glass? Because the principle of TN liquid crystal display is to print circuit boards on the upper and lower glass plates, and it is not possible to use harder glass; the principle of IPS liquid crystal display is that only the lower glass can be controlled, so the upper layer can easily be thick and thin. Hard and soft.
IPS screen is better than TN screen, of course, corresponding to the price, it is not necessarily more cost-effective. The disadvantages of TN over IPS are:
1, up and down perspective is not enough, in general TN screen (notebooks are basically all, you can try to watch yourself) around the perspective is quite large, 130-140 degrees should be no problem, but from top to bottom, especially on the perspective will be particularly small.
2. The number of hair colors is low, and it is widely believed that 16.7 M colors cannot be displayed and only 16.2 M colors can be displayed. This tragedy is caused by problems with the drive circuit.
3, at the same time, this 16.2M missing 500,000 kinds of tragedy, or dithering display. Dithering display: yellow + blue = green, first to you to see yellow, and then quickly turn blue, the human eye has a delay, it feels that the mixed color green.
