| 摘要 |
<p>A free space light propagation-based user input arrangement (202, 502), such as a user input arrangement of a touchscreen or a touch-pad, comprises a number of light emitters (204, 204a, 302b) and corresponding detectors (204, 204b, 302b) configured to transmit light and detect the transmitted light, respectively, the light to be transmitted and detected optionally being or at least including infrared or ultraviolet region light, at least one transmissive element (208, 308) comprising optically substantially transmissive material such as optically substantially transparent material, wherein said at least one transmissive element is to be arranged substantially along or around the edge such as the perimeter of a touch area (212c) on which a touch is to be detected, and wherein the emitters and detectors of said number have been at least partially embedded in the transmissive material of the at least one transmissive element such that, when in use, the light couples from each emitter to the transmissive material of the at least one transmissive element, enters the free space therefrom, propagates in the free space on the touch area and reaches, upon no touch action (212) in the free space interrupting the light propagation, the transmissive material and couples therefrom to the corresponding detector. A corresponding method of manufacture is presented.</p> |
