Abstract: A holder is disposed at a side of a back light module adjacent to a light incident side of a light guide plate (LGP). A light source module is fixed on a wall of the holder that faces the light incident side. A holder engager on a side wall of the LGP engages with an LGP retainer of the holder. When the LGP expands or contracts due to changes of temperature, the holder and the light source module move with the side of the LGP, thereby a gap between the light source module and the light incident side is maintained and the luminance of the backlight module is stabilized.

Abstract: A holder is disposed at a side of a back light module adjacent to a light incident side of a light guide plate (LGP). A light source module is fixed on a wall of the holder that faces the light incident side. A holder engager on a side wall of the LGP engages with an LGP retainer of the holder. When the LGP expands or contracts due to changes of temperature, the holder and the light source module move with the side of the LGP, thereby a gap between the light source module and the light incident side is maintained and the luminance of the backlight module is stabilized.

Abstract: A back light unit adapted to provide light to a liquid crystal display panel includes a housing, at least a light generator, and an optical filter. The light generator is disposed inside the housing for generating white light beams. The optical filter is disposed in an optical path of the white light beams between the light generator and the liquid crystal display panel for filtering the white light beams within a particular wavelength range of visible light. The hue of the white light beams before and after passing through the optical filter are the same.