Abstract: Provided are a backlight and a liquid crystal display device including the same. The backlight unit includes a light source assembly which emits light; a light guide plate which receives at a light incident surface thereof light from the light source assembly; and a bottom chassis having a bottom unit on which the light guide plate is disposed. The bottom unit of the bottom chassis has a first bottom portion which is arranged in the vicinity of the light incident surface and has a first recess, a second bottom portion which is bent diagonally to the cross sectional surface and has a second recess, and a third bottom portion which is bent at the second bottom portion in the direction parallel to the first bottom portion and disposed higher than the first bottom portion. A light absorbing member is disposed in the first and second recesses.

Abstract: Provided are a backlight unit and a liquid crystal display including the backlight unit. The backlight unit includes a light emitting package, and a light guide plate disposed at one side of the light emitting package. The light emitting package includes a printed circuit board including first regions that are spaced an interval apart from each other and second regions defined between the first regions, light source units disposed on the first regions of the printed circuit board, dummy wiring patterns disposed on the second regions of the printed circuit board, and wiring patterns disposed on the printed circuit board and electrically connected to the light source units.

Abstract: A prism sheet includes: a first portion including a prism elongated in a first direction; and a second portion including a prism elongated in a second direction different from the first direction. The second direction is vertical to a light incident surface of a light guide plate of a backlight unit, a light source of the backlight unit faces the light incident surface of the light guide plate, and the prism sheet overlaps a light emitting surface of the light guide plate.

Abstract: Provided are a backlight unit and a liquid crystal display including the backlight unit. The backlight unit includes a light emitting package, and a light guide plate disposed at one side of the light emitting package. The light emitting package includes a printed circuit board including first regions that are spaced an interval apart from each other and second regions defined between the first regions, light source units disposed on the first regions of the printed circuit board, dummy wiring patterns disposed on the second regions of the printed circuit board, and wiring patterns disposed on the printed circuit board and electrically connected to the light source units.

Abstract: Provided is a back-light unit. The back-light unit includes: a reflective layer; a light transmitting plate including a plurality of light emitting diodes; and an optical member disposed on the light transmitting plate and separated from the light transmitting plate with an air layer therebetween, in which light generated from the light emitting diode is reflected to the reflective layer and then passes through the light transmitting plate to reach the optical member.

Abstract: The high intensity light output of edge lighting point light sources such as LEDs may generate undesired leakage light that is optically conducted by way of a continuum of the material of a components affixing adhesive member. In accordance with present disclosure, air filled grooves or other such discontinuities are formed in the adhesive member along respective light output pathways of the respective point light sources. One corresponding embodiment comprises spaced apart LEDs mounted on an FPCB; a light guide plate (LGP) disposed adjacent to the LEDs; a main support accommodating the LEDs and the LGP; and an adhesive member formed to affix together the FPCB, the main support, and the light guide, wherein the adhesive member is patterned to define air filled grooves along respective light output pathways of the LEDs.

Abstract: A prism sheet includes: a first portion including a prism elongated in a first direction; and a second portion including a prism elongated in a second direction different from the first direction. The second direction is vertical to a light incident surface of a light guide plate of a backlight unit, a light source of the backlight unit faces the light indicent surface of the light guide plate, and the prism sheet overlaps a light emitting surface of the light guide plate.

Abstract: Provided is a back-light unit. The back-light unit includes: a reflective layer; a light transmitting plate including a plurality of light emitting diodes; and an optical member disposed on the light transmitting plate and separated from the light transmitting plate with an air layer therebetween, in which light generated from the light emitting diode is reflected to the reflective layer and then passes through the light transmitting plate to reach the optical member.