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AssigneesPanasonic Corporation, Nitto Jushi Kogyo Kabushiki Kaisha
InventorsToshihisa Saito, Masaru Furujiku, Tsuyoshi Ishikawa, Eizaburo Higuchi
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To solve an uneven light quantity caused in a case where a light guide plate, in which light from a spot light source such as an LED enters an surface, changes by 90 degrees and exits the light to the outside, is used as a backlight. The light guide plate of the invention includes a light flux unifying region. The light flux unifying region has an incident surface, a first surface, and an exit surface. Light fluxes emitted from a light source enter the incident surface. The first surface is almost perpendicular to the incident surface and the intensity distribution of the light fluxes having entered is unified at the first surface. The exit surface is disposed almost parallel with the incident surface and the unified light fluxes exit from the exit surface. A boundary line between the incident surface and the first surface has a zigzag surface.
A tabular light guide plate which receives incident light from a side, unifies the levels of the received incident light, and emits uniform light from a plane of the light guide plate, the light guide plate comprising:
A display device comprising:
Dependencies are inferred from the claim text.