55 inch touch screen 4k

55 inch touch screen 4k.All touch screens can detect whether a touch occurs. The method is to pull up one layer with a weak pull-up resistor and pull down the other layer with a strong pull-down resistor. If the measured voltage of the pull-up layer is greater than a certain logic threshold, there is no touch, otherwise there is a touch. The problem with this method is that the touch screen is a huge capacitor. In addition, the capacitance of the touch screen leads may need to be increased in order to filter out the noise introduced by the LCD . Connecting a weak pull-up resistor to a large capacitor will increase the rise time and may cause a false touch to be detected.

IQTouch K Interactive Display

55 inch touch screen 4k.All touch screens can detect whether a touch occurs. The method is to pull up one layer with a weak pull-up resistor and pull down the other layer with a strong pull-down resistor. If the measured voltage of the pull-up layer is greater than a certain logic threshold, there is no touch, otherwise there is a touch. The problem with this method is that the touch screen is a huge capacitor. In addition, the capacitance of the touch screen leads may need to be increased in order to filter out the noise introduced by the LCD . Connecting a weak pull-up resistor to a large capacitor will increase the rise time and may cause a false touch to be detected. IQTouch K interactive touch screen feature 20-point touch and dual system -- Android 8.0 system and optional OPS Windows 10Pro system. Its 4K UHD resolution facilitates presentations and collaboration. With optional multi-screen casting software, IQClass 6.0 and installation-free IQClass Plus software, IQTouch K Series can help create an interactive and collaborative teaching atmosphere in class.

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Let’s See IQTouch K Interactive Display

4K UHD Display

Stunning 4K UHD can display a cystal clear image on
screen.

20 Touch Points

Enable an interactive and collaborative teaching atmosphere
in classroom.

Built in Wifi hotspot & Optional
Multi-screen casting Software

Support to cast your devices to the screen wirelessly,
and your devices can control the screen wirelessly.

Easy-to-Use Built-in Whiteboard
Software

Built-in Whiteboard software under Android system allow to do
two separate screen teaching and three separate screen teaching.

All-channel Annotation

Enable to annotate under Android system and
Windows system.

Power On/Off Lock and Screen Lock can
be Set with A Password Respectively

Support to lock screen and lock power on/off button
to avoid student malfunction and secure privacy.

To compare with our other IQTouch Series

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