| 摘要 |
The improved filter for a photoelectric touch panel has an array of light emitting elements, an array of light receiving elements, a second array of light emitting elements, and a second array of light receiving elements. Each array of light emitting elements is disposed on an opposite side of a rectangular display screen from the corresponding array of light receiving elements, such that each light receiving element is capable of receiving a light beam transmitted straight from a respective light emittig element.
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