The first feature of touch screen is:
Transparency, it directly affects the visual effect of touch screen. Transparency has the problem of transparency. Infrared touch screen and surface acoustic touch screen are separated by only one layer of pure glass. Transparency is outstanding. Other touch screens need to be carefully studied. Transparency is only a very general concept in touch screen industry. Many touch screens are multi-layer composite films. It is not enough to generalize their visual effects with transparency alone. , It should include at least four features: transparency, color distortion, reflectivity and clarity, and can be further divided. For example, the reflectivity includes mirror reflectivity and diffraction reflectivity, but the diffraction reflectivity of the touch screen surface has not reached the CD disc level. These four measures are basically enough for users.
Because of the existence of light transmittance and wavelength curve, the image seen through the touch screen inevitably produces color distortion with the original image. The static image feeling is only color distortion. The dynamic multimedia image feeling is not very comfortable. The color distortion, that is, the maximum color distortion in the picture, is naturally the smaller the better. The usual transparency can only be the average transparency in the graph, of course, the higher the better.
Reflectivity mainly refers to the light and shadow overlapping behind the image caused by mirror reflection, such as shadow, window, light, etc. Reflecting is a negative effect brought by touch screen. The smaller the better, it affects the user's browsing speed. In serious cases, it can not even recognize image characters. The use environment of reflective touch screen is limited, and the lighting arrangement of the scene is also forced to be adjusted.
Most touch screens with reflective problems provide another surface-treated model: the grinding surface touch screen, also known as anti-glare type, with a slightly higher price and a marked decline in anti-glare reflectivity, which is suitable for halls or exhibition venues with very abundant lighting. However, the anti-glare type of light transmittance and clarity also decrease considerably. Definition, some touch screens installed, the handwriting is blurred, image details are blurred, the entire screen appears blurred, can not see clearly, this is too poor clarity.
The problem of sharpness is mainly caused by the repeated reflection and refraction of light between the film layers. In addition, the sharpness of anti-glare touch screen is also reduced due to surface abrasion. The clarity is not good, the eyes are easy to fatigue, and the eyes are also harmful to some extent. When choosing touch screen, we should pay attention to discrimination.
