Patent ID: 9101001
Filing Date: 2015-08-04
Classification: G02B,G02F,G09G,H05B

Abstract:
1. A display backlight assembly comprising: a light guide panel having a first principal face, a second principal face, and at least one edge surface; a display screen aligned with and substantially perpendicular to the first principal face of the light guide panel; a light source comprising at least one white LED and at least one first color LED, wherein the at least one first color LED emits a first color of light selected from the group consisting of red, green, blue, and yellow and wherein the at least one white LED and the at least one first color LED are positioned to emit light into the light guide panel; and a controller electrically coupled to the light source, the controller capable of independently controlling an intensity value for the at least one white LED and for the at least one first color LED, wherein the controller comprises a dual-range driver providing a power output level and having a lower-power range and a higher-power range, the power output level being adjustable according to a linear scale in the lower-power range and the power output level being adjustable according to a logarithmic scale in the higher-power range.