The first feature of the touchscreen: Transparent, it directly affects the visual effect of the touchscreen. Transparent has the degree of transparency, infrared technology touch screen and surface acoustic touch screen only a layer of pure glass, transparent can be a leader, other touch screen this should be a good ponder, "Transparent", in the touchscreen industry, is only a very broad concept, many touch screens are multi-layer composite film, It is not enough to generalize its visual effect with a little transparency, it should include at least four features: transparency, color distortion, reflectivity and sharpness, but also can be divided, such as the degree of reflection including specular reflection and diffraction reflection degree, but the touch screen surface diffraction reflection has not reached the level of CD disk, for the user,
These four metrics have been largely enough. Because of the light transmittance and the existence of wavelength graphs, the image seen through the touch screen inevitably and the original image produced color distortion, static image feeling is only color distortion, dynamic multimedia image feeling is not very comfortable, color distortion is the image of the maximum color distortion is naturally the smaller the better.
The usual transparency is also only the average transparency in the figure, of course, the higher the better. Reflective, mainly refers to the image due to mirror reflection caused by the overlap of light and shadow behind, such as figures, windows, lights and so on. Reflective is the negative effect of the touch screen, the smaller the better, it affects the user's browsing speed, serious even can not recognize the image characters, reflective touch screen use environment is limited, the scene lighting layout is forced to need to adjust. Most touch screens with reflective problems offer another surface-treated model: Matte touch screen, also known as anti-glare type, slightly higher price, anti-glare reflective significantly reduced, suitable for very well-lit halls or exhibition places, however, anti-glare light transmittance and clarity also decreased significantly. Clarity, some touch screen after the installation, the handwriting is blurred, the image details are blurred, the whole screen appears vague, can not see very clearly, this is the clarity is too poor. The problem of clarity is mainly the touch screen of multilayer thin film structure, due to the repeated and reflective refraction between the thin film layer, in addition to the anti-glare touch screen due to the surface scrub also causes the sharpness to decrease.
Clarity is not good, the eyes are prone to fatigue, the eyes also have a certain damage, buy touch screen when you should pay attention to discrimination.
The second feature of the touchscreen: Touch screen is an absolute coordinate system, to choose which is directly point that, and the mouse this kind of relative positioning system is the essential difference is the intuitive in place. The absolute coordinate system is characterized by the fact that each positioning coordinate has nothing to do with the previous positioning coordinates, the touch screen is physically a set of independent coordinate positioning system, each touch of the data through the calibration of data into the screen coordinates, so that the touch screen this set of coordinates, regardless of the circumstances, the same point of output data is stable, If unstable, then this touch screen can not guarantee absolute coordinate positioning, point is not allowed, this is the touch screen the most afraid of the problem: drift.
Technical principle usually can not guarantee the same point touch each sampling data of the same touch screen, there is the problem of drift, there is currently drift phenomenon only capacitive touch screen.
The third feature of the touchscreen: Detecting touch and positioning, a variety of touchscreen technologies rely on their own sensors to work, and even some touch screens are a set of sensors in their own right.
The respective positioning principles and the sensors used in each determine the reaction speed, reliability, stability and life of the touchscreen.