Patent ID: 8007158

Claim:
A backlight assembly comprising: a light guiding plate having an incident light receiving surface with a first thickness and having an adjacent lateral surface, the light receiving surface having a major surface portion and a cutaway minor surface portion disposed at an edge of the major surface portion of the incident light receiving surface, the cutaway minor surface portion being slanted relative to the major surface portion and relative to the lateral surface; a plurality of light emitting diodes (LEDs) disposed adjacent to the major and minor surface portions of the incident light receiving surface for thereby providing incident light to the major and minor surface portions, where each of the LEDs has a respective light radiation angle that is defined by a limited light emitting range of that LED; wherein a first of the plural light emitting diodes faces in substantially paralleling manner, the major surface portion of the incident light receiving surface and is structured to have a respective first light radiation angle; wherein a second of the plural light emitting diodes faces in substantially paralleling manner, the cutaway minor surface portion of the incident light receiving surface and is spaced apart from the first light emitting diode and is structured to have a respective second light radiation angle greater than the first light radiation angle; and wherein the light guiding plate has a dark area and an active light emitting area.