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US 6,746,129 B2Granted
Light guide plate, surface light source device and display
AssigneeEnplas Corporation
InventorShingo Ohkawa
Life of this patent
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AssigneeEnplas Corporation
InventorShingo Ohkawa
Estimating the term…
A surface light source device and display utilize a light guide plate provided with micro-reflectors arranged in an orientation suitable for a plurality of input portions having point-like light emitters, respectively. A light guide plate 15 has a back face divided into areas ARA to ARC to each of which each input portion having each of LEDs 14A to 14C is shared. Micro-reflectors 19 in each of areas ARA to ARC are orientated as to be directed to each of LEDs 14A to 14C correspondingly, effecting an effective direction conversion. Emitted light is incident to a liquid crystal display panel generally at a right angle via a light diffusion sheet. Some micro-reflectors 19 in each of areas ARA to ARC may be arranged as to be directed to an adjacent input portion. Micro-reflectors may be shaped like quadrangle pyramid projections, cylindrical dents or V-shaped dents.
A light guide plate having a plurality of input portions through which an illumination light emitted from a point-like light source is introduced and an emission face provided by a major face through which the illumination light introduced is emitted on the way of inner propagation,
A light guide plate having a plurality of input portions through which an illumination light emitted from a point-like light source is introduced and an emission face provided by a major face through which the illumination light introduced is emitted on the way of inner propagation,
Dependencies are inferred from the claim text.