Back light unit and display apparatus using the same

摘要

To provide a back light unit that reduces an uneven brightness and has a spatially uniform brightness distribution. According to an aspect of the present invention, the back light unit comprises an LED and a light guide plate for guiding light from the LED to a liquid crystal panel side, wherein a recess is provided on the back surface side of the light guide plate, wherein a plurality of LEDs are housed in the recess, and wherein a light amount limiting member is provided at a position facing the recess on s light exit surface side of the light guide plate. The light amount limiting member is configured, for example, by applying an ink with a predetermined optical property to a transparent sheet.

主权项

1. A back light unit comprising:
a plurality of light sources; and a light guide plate for guiding light from the plurality of light sources to a surface of a liquid crystal panel; wherein the back light unit is configured to emit light to the surface of the liquid crystal panel from a light exit surface of the light guide plate facing the surface of the liquid crystal panel; wherein at least one recess is provided on a surface of the light guide plate which is opposite to the light exit surface of the light guide plate; wherein the plurality of light sources are housed in the at least one recess; wherein a light amount adjustment member is provided at a position corresponding to each of the light sources or the at least one recess, on the light exit surface, when seen from a display surface side of the liquid crystal panel; wherein the plurality of light sources are a side view type LED for emitting a white light, and the side view type LED emits light in a direction substantially parallel to the light exit surface of the light guide plate; and wherein the light amount adjustment member is made from a mixed ink of a white ink and a blue ink.