| 摘要 |
An infrared transmitting or receiving circuit board which can be cut at the free location and be reconnected each other is disclosed. A power supply line, a grounding line, a clock signal line or a transfer protocol control line, an infrared pulse signal line and an infrared signal receiving line throughout the circuit board are set on the entire circuit board unit. A decoder with enabling a control input port, and a row driver and a column driver that are controlled and switched by the decoder are set on the one end of the circuit board unit. The circuit board unit can be reconnected and is able to make an infrared touch screen in any size. An infrared touch screen connects to the circuit board unit in parallel by the corresponding port of the controller unit respectively, therefore the synchronous, non-synchronous, and the segmental scanning can be realized.
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