Transparent, it directly affects the touch screen visual effects. Transparent and transparent degree of the problem, the infrared technology touch screen and surface acoustic wave touch screen separated by a layer of pure glass, transparency can be considered outstanding, other touch screen this point should be carefully scrutinize it, "transparent" in the touch screen industry, only a very As a general rule, many touch screens are multi-layered composite films. It is not enough to simply summarize their visual effects with transparency. It should include at least four features: transparency, color distortion, reflectivity and sharpness, Points, such as the degree of reflection, including the degree of reflection of the mirror and the degree of diffraction reflections, but the touch screen surface diffraction refraction has not yet reached the extent of the CD, the user, these four measures have been basically enough.
Due to the existence of light transmittance and wavelength curve, the image seen through the touch screen inevitably has color distortion with the original image, the static image feeling is just the color distortion, and the dynamic multimedia image feeling is not very good Comfortable, color distortion is the maximum color distortion in the picture is naturally smaller is better. The so-called transparency can only be the average transparency of the figure, of course, the higher the better.
Reflective, mainly due to specular reflection caused by overlapping images behind the light and shadow, such as silhouette, windows, lights and so on. Reflective touch screen is the negative effect, the smaller the better, it affects the user's browsing speed, serious or even unrecognizable image characters, reflective touch screen with strong use of the environment is limited, on-site lighting layout also forced to be adjusted. Most touchscreens with reflective issues offer a different type of surface finish: matte touchscreen, also known as anti-glare, slightly more expensive, and significantly less anti-glare retroreflectivity for use in halls or exhibitions where lighting is plentiful Places, however, anti-glare-type translucency and sharpness also will have a more substantial decline. Clarity, some touch screen installation, the writing is blurred, the image details blurred, the entire screen appears vague, do not see clearly, this is the sharpness is poor. The problem with sharpness is mainly the touch screen of a multi-layer film structure, which is caused by the light refraction and refraction between the film layers. In addition, the anti-glare touch screen also reduces the sharpness due to the surface frosting. Clarity is not good, the eyes easy to fatigue, there is also some damage to the eyes, pay attention to distinguish when choosing a touch screen.
Touch screen is the absolute coordinate system, which point to choose directly point that, and the relative positioning of the mouse system is essentially the difference between the intuitive in place. The characteristic of the absolute coordinate system is that each positioning coordinate has no relation with the last positioning coordinate. The touch screen is physically a set of independent coordinate positioning systems, and each touch of the data is converted to the coordinate on the screen by the calibration data. In this way, This set of coordinates of the touch screen no matter under what circumstances, the same point of the output data is stable, if not stable, then the touch screen can not guarantee absolute coordinate positioning, the point is not allowed, this is the most afraid of touch screen problems: drift. The principle of technology can not guarantee the same touch every time the same touch screen data sampling, there is a drift of this problem, there is only a capacitive touch screen drift phenomenon.
Detection of touch and positioning, a variety of touch screen technology is to rely on their own sensor to work, and even some touch screen itself is a set of sensors. The respective positioning principle and the respective sensor used determine the response speed, reliability, stability and life of the touch screen.