touch screen lcd 40.The microprocessor controls these two clocks and the data input (DS). A pulse is written into the shift register through the data input terminal. The written data can be shifted into the register on the rising edge of the shift clock, and the data can be placed in the internal latch on the rising edge of the storage clock. With such characteristics, the input pulse can be moved to the transmitting tube on the rising edge of the shift clock, and the transmitting tube can be lit on the rising edge of the storage clock. The input pulse is continuously shifted with the rising edge of the shift clock until it is removed from the output. The output end of the first shift latch is connected to the input end of the next stage, and the pulse of the previous stage can be shifted into the next stage. Therefore, the cascade of the shift latches can be realized, and the microprocessor can drive more transmitting tubes at the same time . Combining the above characteristics, the transmitting tubes can be lighted one by one. Scanning the entire IR transmitting circuit as shown below:

touch screen lcd 40.The microprocessor controls these two clocks and the data input (DS). A pulse is written into the shift register through the data input terminal. The written data can be shifted into the register on the rising edge of the shift clock, and the data can be placed in the internal latch on the rising edge of the storage clock. With such characteristics, the input pulse can be moved to the transmitting tube on the rising edge of the shift clock, and the transmitting tube can be lit on the rising edge of the storage clock. The input pulse is continuously shifted with the rising edge of the shift clock until it is removed from the output. The output end of the first shift latch is connected to the input end of the next stage, and the pulse of the previous stage can be shifted into the next stage. Therefore, the cascade of the shift latches can be realized, and the microprocessor can drive more transmitting tubes at the same time . Combining the above characteristics, the transmitting tubes can be lighted one by one. Scanning the entire IR transmitting circuit as shown below: 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.