Cheap China Projected Capacitive Multi Touch Panel Suppliers

2019-08-13

Projected Capacitive Multi Touch Panel

With the expansion of industrial display application, it can be seen in every public scene. So, when a user chooses an industrial display, what kind of touch is the first consideration? Understanding the differences in the way industrial displays are touched can help users choose products with better cost performance. And the industry on the market display category of touch mode commonly used touch mode is generally capacitive screen and resistive screen, what is the difference between the two? According to different usage requirements and scenarios, how should users choose from them?


The difference between capacitive and resistive screens: industrial displays are more power-intensive than resistive screens. Capacitive screens are more expensive, with different manufacturers offering 10 to 50 percent more expensive screens than resistive ones, which are cheaper. Multi-touch control of capacitive screen can be achieved, depending on the way of implementation and the software used, it has been achieved so far. Multi-touch with resistive screens is not possible.


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Both capacitive and resistive screens have good visual effects indoors, but outside, especially in sunlight, the visual effects are significantly different. Capacitive screens are better, but resistive screens are less visible because of extra layers reflecting sunlight. Capacitive screens operate at temperatures between 0 ° c and 35 ° c, requiring at least 5% humidity. There is no specific value for the operating temperature of the resistance screen, but it has been proved that the resistance screen can work normally at a temperature of -15℃ to 45℃, and the resistance screen does not require much humidity.


Capacitive screens work by using the human body's current sensing, so any non-conductive material such as fingernails and gloves cannot be recognized by the capacitive sensing system at the bottom of the screen. However, resistive screens work by pressure sensing, which can be touched by any object and supports stylus.


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Capacitive screens are easy to spot by touching with a finger, but are easy to clean because their outermost layer is glass. A resistive screen, on the other hand, supports things like stylus and nails, so it's not as easy to get dirty.


The outer layer of capacitive screen is silica glass protective layer, which may be broken under severe impact. The outermost layer of the resistive screen is a thin film, which needs to be pressed down for pressure sensing, and the resistive screen supports a stylus, which makes the screen prone to scratches, requires a protective film and relatively more frequent calibration, but is less likely to be damaged than a capacitive screen.


In theory, capacitive screens can reach several pixels, but in practice, due to the limitations of finger contact area, it is difficult to accurately click on targets less than 1cm. Resistive screens are at least as accurate as a single display pixel, as can be seen with a stylus. Easy handwriting recognition, help in the use of small control elements in the interface.


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Different application scenarios correspond to different touch modes: if industrial displays only use basic functions, resistive screens should be used, because resistive screens cost less; If the industrial display needs a long standby time, you should choose the resistance screen, because the capacitive screen is more expensive than the resistance screen; If industrial displays require multitouch, choose capacitive screens, which are not currently available on resistive screens. If the industrial display needs to use a stylus, you should choose a resistive screen, because the capacitive screen works so that the capacitive screen does not support stylus;


If the industrial display in the use of the process will often impact on it, should choose the resistance screen, because the capacitor screen is prone to fracture under impact; If the industrial display is often used in sunlight, you should choose capacitor screen, because the resistance of the screen in sunlight reflection affect the use; If the industrial display working environment is dry, you should choose the resistance screen, because the capacitor screen has a humidity requirement for the working environment, and the resistance screen does not; If the industrial display temperature fluctuations, beyond 00-350, you should choose the resistance screen, because the capacitor screen temperature of 00-350, beyond this range of capacitor screen is not good, and the resistance screen temperature range is relatively wide.


About the selection of industrial display touch here, in general, the selection of industrial display products, mainly to understand the advantages and disadvantages of capacitive touch and resistance touch, find their own needs, to find the right product.


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