It is well known that the most basic principle of liquid crystal display is that because the liquid crystal molecule is a unique substance, it will refract when light enters it. At the same time, the liquid crystal molecule has unique electrical properties and can be deflected under the action of an electric field. Once the two characteristics are combined, under the action of the polarizer, people can use the electric field to control the light and dark changes of the light, and refine it to each pixel, that is, to control the light and dark degree of each unit, so as to achieve the display effect.
The viewing angle performance of the touch screen is a very important indicator, it refers to the visual range that meets the following two visual requirements. The first is the contrast ratio, which generally requires a contrast ratio of 10:1. The second is grayscale, which requires no grayscale inversion. Combining the above two requirements, the viewing angle is defined as the angle when the contrast ratio is 10:1 within the angle range without grayscale inversion.
Since the screen of the touch display adopts a light transmission mechanism, and the light is emitted forward at a near-vertical angle through the liquid crystal, the best visual effect can be achieved only when the display is directly in front of it. When the viewing angle is changed, the angle at which the light of the display screen enters the human eye will also change, and the display content will be distorted and darkened; when the viewing angle exceeds a certain critical angle, we will not be able to see the screen content. This is what we call the viewing angle.
The viewing angle usually includes two indicators: the horizontal viewing angle and the vertical viewing angle.
The horizontal viewing angle is based on the vertical normal of the touch display(that is, the vertical imaginary line in the middle of the display) shall prevail, and the display content can still be viewed normally at a certain angle on the left or right side of the normal line. This angle is the horizontal viewing angle of the touch screen.
The vertical viewing angle is based on the horizontal detection of the touch screen, and the angle range of the upper and lower sides that can normally view the image is the vertical viewing angle of the LCD screen.
Generally speaking, as long as the horizontal viewing angle reaches 120 degrees and the vertical viewing angle reaches 140 degrees, it can meet the application needs of most users. The panel of Top One Tech's touch display screen is produced with wide viewing angle technology, which can reach a full viewing angle of 180 degrees, reducing the inconvenience caused by the small viewing angle.
Top One Tech is a high-tech enterprise integrating R&D, design, production, sales and service of industrial touch monitors and touch screens. The industrial screens it develops and produces meet the requirements of wide viewing angle, 180°wide viewing angle technology, light transmission, with higher rate, can release color from any angle, the picture is more realistic, the color is more saturated, so that your terminal products are more competitive.
