Abstract: A direct light type backlight unit having a structure in which divided luminance areas are sequentially turned on and off and a liquid crystal display device employing the backlight unit are provided. The backlight unit includes: a base substrate; a plurality of point light sources arranged in a plurality of lines and mounted on the base substrate; and a reflector sheet vertically formed between lines of the point light sources, reflecting light emitted from the point light sources.

Abstract: A backlight unit and an LCD employing the backlight unit are provided. The backlight unit includes: a base substrate; a plurality of point light sources arranged in two or more lines on the base substrate; a diffusion plate disposed over the plurality of point light sources to diffuse and transmit incident light; and at least one barrier rib forming two or more division areas by being disposed between the base substrate and the diffusion plate to be upright with respect to the base substrate between the lines and having a wall surface reflecting light incident from the plurality of point light sources, at least a portion of an end portion of the barrier rib being inserted into the diffusion plate.

Abstract: A backlight system providing enhanced uniform brightness and a liquid crystal display (LCD) employing the same are provided. The backlight system includes: a light guide panel which forms a surface light source by guiding light; and a plurality of light emitting units arranged on at least one side of the light guide panel in the form of an array, wherein when the light emitting units in the array are divided into a first region, a second region and a third region and at least one of light emitting units is included in an edge of the first region and an edge of the third region, a quantity of current applied to the first region and the third region is controlled to be larger than a quantity of current applied to the second region in order to control the light guide panel to provide uniform brightness.

Abstract: A backlight system providing enhanced uniform brightness and a liquid crystal display (LCD) employing the same are provided. The backlight system includes: a light guide panel which forms a surface light source by guiding light; and a plurality of light emitting units arranged on at least one side of the light guide panel in the form of an array, wherein when the light emitting units in the array are divided into a first region, a second region and a third region and at least one of light emitting units is included in an edge of the first region and an edge of the third region, a quantity of current applied to the first region and the third region is controlled to be larger than a quantity of current applied to the second region in order to control the light guide panel to provide uniform brightness.

Abstract: A backlight unit and an LCD employing the backlight unit are provided. The backlight unit includes: a plurality of division areas; a light source which is able to be lighted and is disposed on one sidewall surface of a barrier rib defining the plurality of division areas; and a heat radiation device disposed on an opposite wall surface of the barrier rib to the one sidewall surface, wherein each of the plurality of division areas is constructed to bi-divide light reflection and heat radiation.

Abstract: A backlight unit and an LCD employing the backlight unit are provided. The backlight unit includes: a base substrate; a plurality of point light sources arranged in two or more lines on the base substrate; a diffusion plate disposed over the plurality of point light sources to diffuse and transmit incident light; and at least one barrier rib forming two or more division areas by being disposed between the base substrate and the diffusion plate to be upright with respect to the base substrate between the lines and having a wall surface reflecting light incident from the plurality of point light sources, at least a portion of an end portion of the barrier rib being inserted into the diffusion plate.

Abstract: A direct light type backlight unit having a structure in which divided luminance areas are sequentially turned on and off and a liquid crystal display device employing the backlight unit are provided. The backlight unit includes: a base substrate; a plurality of point light sources arranged in a plurality of lines and mounted on the base substrate; and a reflector sheet vertically formed between lines of the point light sources, reflecting light emitted from the point light sources.

Abstract: A reflecting type liquid crystal display device having a perpendicularly aligned structure and shorter response time and a projector using the same are provided. The reflecting type liquid crystal display device includes a first substrate having a reflective electrode, a second substrate having a transparent electrode, first and second alignment layers provided on the first substrate and the second substrate to be opposed to and face each other, a spacer interposed between the first alignment layer and the second alignment layer to form a predetermined cell gap therebetween, and vertically aligned liquid crystals injected into the cell gap, the cell gap being not greater than 1.0 ?m, the dielectric anisotropy of the liquid crystals being negative value, and the refractive index anisotropy of the liquid crystals being not less than 0.14.