| 摘要 |
A handheld electronic device ( 100 ), e.g., cellular telephone handset, is provided with a color laser projector system ( 300 ) that includes an optics module ( 112 ) includes a large green laser module ( 316 ) and smaller red ( 314 ) and blue ( 318 ) laser modules in a compact arrangement in which the red ( 314 ) and blue ( 318 ) laser module are arrange within a dimensional extent D1 of the green laser module ( 316 ) in a direction that is perpendicular to a direction in which a green laser beam ( 426 ) is emitted. The optics module ( 112 ) uses a single photo-detector 328 to sense the intensity of laser beams emitted by the three laser modules ( 314, 316, 318 ). A prism can be used to direct light to a bare chip ( 804 ) photo-detector ( 328 ). Alternatively, a right angle mounted surface mount photo-detector ( 328 ) can be used.
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