Kunlun Tongtai touch screen - the main technical characteristics of the touch screen

From the perspective of skill principle, the touch screen is a set of clear affirmative coordinate positioning system, first of all, it is necessary to ensure that it is transparent, so it is necessary to deal with the problem of transparency through information technology, such as digitizers, writing boards, elevator switches, they are not touch screens; Secondly, it is a sure coordinate, where the finger touches, there is no need for the second action, unlike the mouse, it is a set of relative positioning system, we can notice that the touch screen software does not need the cursor, and the cursor affects the user's attention, because the cursor is used for the relative positioning of the device, and the relative positioning of the device to move to a local area must first know where it is, in which direction, and every moment it is necessary to constantly feedback the current orientation to the user so as not to present deviations. None of this is needed for touch screens that adopt positive coordinate positioning; Secondly, it can detect the touch of the finger and determine the direction of the finger.

Transparent properties

Transparency, which directly affects the visual effect of the touch screen. Transparency has the problem of the degree of transparency, the infrared skill touch screen and the appearance of the sonic touch screen are only separated by a layer of pure glass, clear can be regarded as a leader, other touch screens should be pondered well, "transparent", in the touch screen profession, is just a very general concept, many touch screens are multi-layer composite films, it is not enough to use transparency to summarize its visual effect, it should contain at least four characteristics: transparency, color distortion, reflectivity and clarity, and can be divided again, For example, the degree of reflection includes the degree of mirror reflection and the degree of diffraction reflection, but the diffraction reflection on the surface of the touch screen has not yet reached the level of the CD disk, and for users, these four measurements are simply enough.

Because of the existence of light transmittance and wavelength curves, the image seen through the touch screen inevitably produces color distortion with the original image, the static image feeling is only the color distortion, the dynamic multimedia image feeling is not very comfortable, and the color distortion is the maximum color distortion of the figure, which is naturally the smaller the better. The usual clarity can only be the uniform transparency of the graph, of course, the higher the better.

Reflective properties

Reflectivity mainly refers to the light and shadow behind the overlapping image due to specular reflection, such as human figures, windows, lights, etc. Reflection is the negative effect of the touch screen, the smaller the better, it affects the user's reading speed, and even the image characters cannot be recognized in serious cases, the reflective touch screen application environment is limited, and the lighting arrangement on the scene is also forced to adjust the demand. Most of the touch screens with reflective problems are provided with another type of exterior treatment: matte touch screen, also called anti-glare type, the price is slightly higher, the anti-glare type reflectivity is significantly reduced, suitable for halls or exhibition places with very sufficient lighting, however, the light transmittance and clarity of the anti-glare type also have a large fluctuation of decline. Clarity, after some touch screens are installed, the handwriting is vague, the image details are vague, and the whole screen appears vague and can't be seen clearly, which is too poor definition. The problem of clarity is mainly due to the repetition and reflection of light between the film layers, and the anti-glare touch screen is also reduced due to the frosting of the surface. The clarity is not good, the eyes are simple and tired, and there is also some damage to the eyes, so you should pay attention to the judgment when purchasing the touch screen.

Absolute coordinates

The touch screen is an absolute coordinate system, and the essential difference between the relative positioning system and the mouse is the intuitiveness in place. The characteristics of the absolute coordinate system are that each positioning coordinate has no relationship with the previous positioning coordinates, the touch screen is a set of independent coordinate positioning system in physics, and the data of each touch is converted into the coordinates on the screen through the calibration data, so that the touch screen is required to have this set of coordinates no matter what the situation, the output data of the same point is stable, if it is unstable, then the touch screen can not guarantee the absolute coordinate positioning, and the point is not accurate, which is the problem that the touch screen is most afraid of: drift. In principle, all touches that cannot guarantee the same touch at the same point and the same sampling data for each time have the problem of drift, and there is currently a drift phenomenon as long as the capacitive touch screen.

Detect positioning

Detect touch and localize, various touchscreen skills rely on their own sensors to work, and some even touch screens are a set of sensors themselves. The respective positioning principles and the sensors used determine the response speed, reliability, stability and longevity of the touch screen.

Kunlun Tongtai touch screen - the main technical characteristics of the touch screen

Kunlun Tongtai touch screen - the main technical characteristics of the touch screen

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