| 摘要 |
An exemplary touch screen apparatus comprises a display screen, a first reflector, a first infrared light source, and an infrared light receiving unit. The display screen includes a display area. The first reflector is disposed outside said display screen and surrounds the display area. The first reflector has a first focal point, and the first infrared light source is disposed on the first focal point. The infrared light receiving unit is capable of receiving the infrared light from the display screen.
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