How to judge the quality of the touch screen?

- Nov 02, 2019-

How about the quality of touch screen?


This issue cannot be generalized and should be analyzed according to your specific situation. Here is a brief introduction to the characteristics of the touch screen for your reference. The first feature of the touch screen: transparency, which directly affects the visual performance of the touch screen. The degree of transparency has transparency. The infrared technology touch screen and the surface acoustic wave touch screen are separated by a layer of pure glass. The transparency can be considered as a leader. Other touch screens should be carefully scrutinized. "Transparent" is only a very special in the touch screen industry. A general concept, many touch screens are multi-layer composite films. It is not enough to summarize its visual effects with transparency. It should include at least four characteristics: transparency, color distortion, reflectivity and clarity. The degree of reflection, such as the degree of specular reflection and the degree of diffractive reflection, is only the extent that the diffractive reflection on the surface of the touch screen has not reached the CD. For the user, these four metrics are basically enough. Due to the existence of light transmittance and wavelength graph, the image seen through the touch screen inevitably produces color distortion with the original image. The static image perception is only the color distortion, and the dynamic multimedia image feels not very Comfortable, the color distortion is also the large color distortion in the picture is naturally the smaller the better. The usual transparency is only the average transparency in the picture. Of course, the higher the better. Reflective, mainly refers to the light and shadow behind the image due to specular reflection, such as people, windows, lights and so on.



Reflective is the negative effect brought by the touch screen. The smaller the better, it affects the user's browsing speed. In severe cases, even the image characters cannot be recognized. The reflective environment of the touch screen is limited, and the lighting layout on the scene is forced to be adjusted. Most touch screens with reflective problems offer another surface-treated model: matte-faced touch screen, also known as anti-glare type, which is slightly more expensive, and has significantly reduced anti-glare reflectivity, suitable for halls or exhibitions where lighting is sufficient. Location, however, the anti-glare type of light transmission and clarity also have a significant decline. Sharpness, after some touch screens are installed, the writing is blurred, the details of the image are blurred, and the whole screen appears vague and unclear. This is the clarity. The problem of sharpness is mainly the touch screen of a multi-layer film structure, which is caused by repeated light and reflection between the film layers, and the anti-glare type touch screen also causes a decrease in sharpness due to surface frosting. The clarity is not good, the eyes are easy to fatigue, and there is some damage to the eyes. Pay attention to the discrimination when purchasing the touch screen. The second feature of the touch screen: the touch screen is an absolute coordinate system. To choose which one to point directly, the essential difference between a relative positioning system such as a mouse is the intuitiveness of one position. The characteristic of the absolute coordinate system is that each positioning coordinate has no relationship with the previous positioning coordinate. The touch screen is physically an independent coordinate positioning system, and each touched data is converted to the coordinates on the screen by the calibration data, thus requiring The set of coordinates of the touch screen is stable under the same conditions. If it is unstable, the touch screen cannot ensure absolute coordinate positioning. The point is not accurate. This is the problem that the touch screen is afraid of: drift. In principle, there is a problem that drift can be ensured by the same touch screen that touches the same data every time. At present, there is only a capacitive touch screen with drift phenomenon. The third feature of the touch screen: detecting touch and positioning, various touch screen technologies rely on their own sensors to work, and even some touch screens themselves are a set of sensors. The respective positioning principles and the sensors used individually determine the response speed, reliability, stability and longevity of the touch screen. Want to know more about the touch screen, you can consult Shenzhen Xinhechang Technology Co., Ltd., thank you!


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HONGKONG XIN HE CHANG
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