| 摘要 |
A high efficiency illumination device has a light guide with a light entrance for converting entering lights into lights exiting through light exit surfaces. Numerous light emitting elements are arranged near the light entrance. A mounting mechanism is interposed between the light emitting elements and the light entrance for affixing them to each other. For each light emitting element, the mounting mechanism also includes an integrated lens for collecting and collimating lights emanated from the light emitting element into the light entrance. In one embodiment, the illumination device further includes an anti-reflection layer placed between the integrated lens and the light entrance to minimize light loss due to Fresnel reflection at the interface between them. The anti-reflection layer can be made of a transparent and non-evaporating liquid material to form an intimately conforming, long lasting air-free bridge between the integrated lens and the light entrance.
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