| 摘要 |
An exemplary multi-touch input device includes a stress sensing plate, a first polarizer, a infrared light module, a second polarizer, an infrared camera module, and a processor. The stress sensing plate has a touching surface, an internal stress is generated when an object touches the tress sensing plate. The infrared light source module is configured for emitting infrared light to the first polarizer. The first polarizer is disposed between the stress sensing plate and the infrared light source. The infrared camera module is configured for capturing the image corresponding to the infrared light outputting from the stress sensing plate through the second polarizer. The processor is to receive the infrared image from the infrared camera module and obtain the position or a trace the stress sensing plate be touched accordingly.
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