Patent ID: 7950831

Claim:
An LED lamp unit for a liquid crystal display device comprising: one or more LED chips for emitting light; an optical lens for transmitting and refracting light emitted from the one or more LED chips, the optical lens having a central recess part, the central recess part having a depth, length and width, wherein the length of the central recess part is greater than the width of the central recess part, wherein the optical lens has a length in the same direction as the length of the central recess part, width in the same direction as the width of the central recess part and height in the same direction as the height of the central recess part, wherein the length of the optical lens is greater than the width of the optical lens, wherein the width of the optical lens is greater than the height of the optical lens, wherein the depth of the central recess part is most of the height of the optical lens, wherein the central recess part is hollowed inwardly, and wherein the central recess part is surrounded by an elevated edge which is formed in a shape of a convex lens, wherein the elevated edge is positioned at a side direction of the central recess part, wherein the one or more LED chips are arranged at fixed intervals in a lower portion of the optical lens; and a lower reflecting sheet positioned on a bottom surface of the one or more LED chips, wherein the light emitted from at least one LED chip is mostly progressing to the side direction by the optical lens.