| 摘要 |
A button device for a touch panel has a touch panel, an upper indium-tin oxide (ITO) layer, a light transmission board, a lower ITO layer, a spacer, multiple contacts, a reflective film and a light emitting diode (LED). The upper ITO layer is attached to the touch panel. The lower ITO layer is attached to the light transmission board. The spacer is attached to and between the upper and lower ITO layers. The contacts are mounted on the lower ITO layer and selectively electrically connect to the upper ITO layer. The reflective film is attached to the light transmission board and has a front edge, a rear edge and a primary rib formed near the front edge. The LED corresponds to the rear edge of the reflective film and emits light. The light is reflected by the reflective film out of the touch panel.
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