The first feature of the touchscreen: Transparent, it directly affects the visual effect of the touch screen. Transparency has the degree of transparency issues, infrared technology touch screen and surface acoustic wave touch screen only separated by a layer of pure glass, transparent can be counted as the best, other touch screen this is to be well-elaborated, "Transparent", in the touch screen industry, is a very general concept, many touch screen is multilayer composite film, It is not enough to generalize its visual effect by just a little, it should include at least four features: transparency, color distortion, reflective and sharpness, and can also be divided, such as reflective degree of reflection and the degree of diffraction reflection, but the touch screen surface diffraction reflection has not reached the extent of the CD, for users,
These four metrics are basically enough.
A second feature of the touchscreen: Touch screen is an absolute coordinate system, to choose which is the direct point that, and the mouse this kind of relative positioning system of the essential difference is the intuitive in place. The absolute coordinate system is characterized by the location of each coordinate and the last location of the coordinates have no relationship, the touch screen is a set of independent coordinate positioning system, each touch of data through the calibration data to the screen coordinates, so that the touch screen this set of coordinates in any case, the same point of output data is stable, If not stable, then this touch screen can not guarantee the absolute coordinate positioning, point is not allowed, this is the most afraid of the touch screen problem: drift.
Technically, there is no guarantee that the same touch every time the same touch screen sampling data is unavoidable drift this problem, there is a drift phenomenon only capacitive touch screen.
A third feature of the touchscreen: Sensing touch and positioning, a variety of touch screen technologies rely on their own sensors to work, and even some touch screen itself is a set of sensors.
The respective positioning principle and the respective sensors determine the response speed, reliability, stability and life of the touchscreen.
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