laptop with 17 inch touch screen.In order to obtain an accurate touch position, the interference of ambient light must be excluded when calculating the touch position. For this reason, the field value of each pair of pipes is determined as a basis for judging whether there is a finger touch. This domain value can be determined by sampling the data in the "0" state and "1" state of each pair of pipes . "0" state, that is, all the transmitting tubes are cleared once. At this time, the transmitting tubes are in the extinguished state. In this way, the sample is the luminous flux of ambient light received by the receiving tube. The tubes are lighted one by one. At this time, only one of the emission tubes is lighted. What is sampled is the light flux of the receiving tube to receive the corresponding emission tube and surrounding light. The calculation of the touch position of the infrared touch screen is mainly obtained by the ratio of the light intensity when it is blocked and when it is not blocked. When determining the touch position, the blocked pipe can be determined first, and the approximate position of the blocked pipe can be calculated. If the blocked tube is the Nth tube, and the approximate position of this blocked is Ld, then:

laptop with 17 inch touch screen.In order to obtain an accurate touch position, the interference of ambient light must be excluded when calculating the touch position. For this reason, the field value of each pair of pipes is determined as a basis for judging whether there is a finger touch. This domain value can be determined by sampling the data in the "0" state and "1" state of each pair of pipes . "0" state, that is, all the transmitting tubes are cleared once. At this time, the transmitting tubes are in the extinguished state. In this way, the sample is the luminous flux of ambient light received by the receiving tube. The tubes are lighted one by one. At this time, only one of the emission tubes is lighted. What is sampled is the light flux of the receiving tube to receive the corresponding emission tube and surrounding light. The calculation of the touch position of the infrared touch screen is mainly obtained by the ratio of the light intensity when it is blocked and when it is not blocked. When determining the touch position, the blocked pipe can be determined first, and the approximate position of the blocked pipe can be calculated. If the blocked tube is the Nth tube, and the approximate position of this blocked is Ld, then: 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.