Fault pipe fast searching method of infrared touch screen
An infrared touch screen, touch screen technology, applied in the input/output process of data processing, measuring devices, instruments, etc., can solve problems such as unimaginable workload, time-consuming and labor-intensive
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[0021] The invention provides a method for quickly searching for faulty tubes of an infrared touch screen. In the method, the firmware program of the infrared touch screen can self-check when it is powered on, scan the infrared grid several times under standard lighting conditions, and read the information of each phototransistor. The voltage value is the change amount when there is no blockage and when there is no infrared light irradiation. If the change amount is less than the limit value, it is judged as a bad tube.
[0022] The inventive method is described in further detail below:
[0023] figure 1 is a schematic diagram of the hardware structure involved in the method. As shown in the figure: the outer frame of the touch screen is installed with an array of infrared emitting tubes and an array of infrared receiving tubes in the horizontal and vertical directions according to the one-to-one correspondence between the emitting tubes and the receiving tubes, forming an in...
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