| 摘要 |
The present invention relates to light emitting devices and more specifically to light emitting devices comprising light guides making use of total internal reflection (TIR). The light emitting device (100, 600) comprises a substrate (3), a plurality of light sources (2) mounted on the substrate (3) and a light guide plate (4). Reflective shielding (5) is arranged to shield the light guide plate (4) at positions were the flux of the direct light of the light sources (2) towards the light guide plate (4) have their maximum density in a powered state of the light sources (2). The reflective shielding (5) enhances the mixing of light and avoids glare problems. In-coupled is transmitted within the light guide plate (4) by total internal reflection so that light from different light sources (2) is mixed within the light guide plate (4). Further, at least a part of the lower surface is provided with an optical structure (6) for out-coupling of light.
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