Patent ID: 6793361
Filing Date: 2004-09-21
Classification: G09F

Abstract:
A backlight illuminator comprising:a plurality of linear light sources arranged in parallel; a surface to be illuminated fixedly positioned above said linear light sources; and a reflector arranged symmetrically about each linear light source along each light source so as to reflect light from each linear light source back to the surface to be illuminated, said reflector including a reflective region formed in symmetry on both sides of each of the light sources, said reflective region consisting of a first reflective surface close to the light source, a second reflective surface, an a third reflective surface distant from the light source, said first reflective surface close to the light source being formed to have a horizontal surface so as to reflect light back to a first region of the surface to be illuminated, said second reflective surface being formed into either an angled surface slanted with respect to the horizontal surface or curved surface concavely curved with respect thereto so as to reflect light back to a second region of the surface to be illuminated, said third reflective surface distant from the light source being formed into an angled surface slanted with respect to the horizontal reflective surface so as to reflect light back to a third region of the surface to be illuminated, illumination ranges of the second and third regions of the surface to be illuminated being overlapped with an illumination range of the first region of the surface to be illuminated, said illumination range of the second region extending over an intermediate position between each two neighboring light sources to overlap an illumination surface corresponding to each neighboring light source and defined between two intermediate positions by 0% to 20% of a distance between the light source and the intermediate position, and said illumination range of the third region extending over the intermediate position of the neighboring light source to overlap the illumination surface of the neighboring light source by 0% to 10% of the distance between the light source and the intermediate position.