| 摘要 |
A backlight device according to an embodiment includes: first and second light emitting units configured to emit light; and a semi-transmissive reflector placed between the first light emitting unit and the second light emitting unit. The semi-transmissive reflector has a higher reflectance with respect to light incident on a first face facing the first light emitting unit than a reflectance with respect to light incident on a second face facing the second light emitting unit, the semi-transmissive reflector has a higher transmittance with respect to the light incident on the second face than a transmittance with respect to the light incident on the first face.
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