Patent ID: 9164227
Filing Date: 2015-10-20
Classification: G02B

Abstract:
1. An LED backlight module, comprising a light guide plate (LGP), an LED light bar, a backplane comprising elongate linear slots formed therein and extending in a lengthwise direction, and a heat sink, the LED light bar being mounted on the heat sink at a location close to a light incidence side of the LGP and emitting light traveling in a light incidence direction to get incident to the light incidence side of the LGP, the light incidence direction being parallel to the lengthwise direction of the elongate linear slots of the backplane, the heat sink forming upward-extending LGP positioning columns that are fixed with respect thereto, the LGP positioning columns extending upward and through the LGP so as to fix the LGP with respect to the heat sink and also extending downward to be moveably receiving in the elongate linear slots of the backplane, wherein the heat sink is arranged on the backplane and is movable with respect to the backplane in the light incidence direction by being guided by the movement of the LGP positioning columns in the lengthwise direction of the elongate linear slots of the backplane, the heat sink being movable in unison with a portion of the LGP in the lengthwise direction of the elongate linear slots of the backplane with expansion or contraction of the LGP so as to maintain light coupling distance between the LGP and the LED light bar.