interactive panels for education
Capacitive touch screen technology USES the body's current sensing. Capacitive touch screen is a kind of four layer composite glass screen. The inner surface of the glass screen and interlayer coating a layer of ITO, the outermost layer of thin protective layer of silica glass. Mezzanine ITO coating as the working face, four Angle of draw out four electrodes, inner ITO as shielding layer, ensure good working environment. interactive panels for education When fingers touching the metal layer, the electric field due to the human body, the user and the touch screen surface to form a coupling capacitance. Conductor for high frequency current, capacitance is directly, so the fingers from the point of contact to absorb a small current. The current flows from the four corners of the touch screen, electrode respectively, through the four electrode current is proportional to the finger to the four corners. Controller through the accurate calculation of the four current ratio, the location of the touch point.
Local electric charge on the surface, in layman's terms, electrostatic, result in unable to judge whether there is a finger or other conductor (such as capacitance pen) according to the above. Friction in your pocket, you push hard on the often, there is some dirt on screen and hand sweat more, or the winter dry the body itself is static, etc., are likely to lead to screen local load. And in addition to the winter dry cause human body electrostatic, temperature is an important factor, the capacitance screen use condition is strict, such as temperature, humidity and so on, the theory of capacitance screen using the environment temperature requirements between 0 to 35 ℃. And the northern winter temperatures generally under 0 ℃, screen failure would happen naturally.
Generally speaking, interactive touch screens education forced to restart can be resolved. At the same time, press the power button and home about eight seconds, keyboard into a state can be forced to restart. However, if still can't solve, this is mostly caused by the hardware. This is usually caused by this situation. First, it fell down, or just dropped it. Screen touch screen is loose, fall off direct connection over a period of time.
Touchscreen brand on the domestic market, digital interactive whiteboard have high, medium and low three stages, including the international line of good quality brand, also has a reasonable price of domestic brands. If the budget is enough, takes the big brands, can choose international first-line brand.
If you are very concerned interactive panel board about the price, you need only be used for the touch screen display, often do not control input. Can choose the cheap homebred brand. If you are not very rich budget, also often use touch screen input control, consider the middle resistance performance of the brand.
General international first-line brand touch screen, digital touch screen board the price of relativity approachable certain products scope is relatively small, generally can only be used for its own brand products, and even some of the brand series of products, and therefore can not adapt to the other brands of equipment on the market, so choose adaptable equipment as far as possible.
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