| 摘要 |
<p>An infrared touch screen employing a light distribution lens, comprising a liquid crystal display, and an infrared transceiver module; the infrared transceiver module comprises an infrared transmitting array consisting of a plurality of infrared transmitting tubes, an infrared receiving array consisting of a plurality of infrared receiving tubes, and a printed circuit board; the infrared transmitting array and the infrared receiving array are both welded on the printed circuit board, and are both located behind the display surface of the liquid crystal display; the transmitting end of the infrared transmitting array and the receiving end of the infrared receiving array are provided with an optical assembly therebetween; the optical assembly enables the infrared rays emitted by the infrared transmitting array to form an infrared ray detection grid parallel to the display surface in the front of the liquid crystal display in the process of transmitting to the infrared receiving array; the optical assembly is annularly disposed around the liquid crystal display; and one end of the optical assembly allocated for emitting the infrared ray detection grid is located in the front of the display surface of the liquid crystal display.</p> |
