Back light module and liquid crystal display
AssigneeToppoly Optoelectronics Corp.
InventorChe-Kuei Mai
Life of this patent
Estimating the term…
Abstract
A back light module is provided. The back light module comprises a light-guiding plate, a side light source and a bottom light source. The side light source is positioned on one side facing a side surface of the light-guiding plate. The bottom light source is positioned on a bottom surface of the light-guiding plate. Light from the side light source and the bottom light source both emerge from a top surface of the light-guiding plate. The side light source and the bottom light source together provide a bright surface light source that illuminates a liquid crystal display to produce a better display effect. In addition, this invention also provides e liquid crystal display comprising a transmissive or transflective liquid crystal display panel and the aforementioned back light module.
Claims18
A back light module for providing a plane light source, at least comprising:
- a light-guiding plate having a top surface, a bottom surface and at least a side surface;
- a side light source positioned next to one side surface of the light-guiding plate, wherein light from the side light source is able to enter the side surface of the light-guiding plate and emerges from the top surface after deflection by the bottom surface;
- a bottom light source attached to the bottom surface of the light-guiding plate, wherein light from the bottom light source is able to enter the bottom surface of the light-guiding plate and emerge from the top surface of the light-guiding plate;
- and
- a reflective holder positioned next to the side surface of the light-guiding plate that also encloses the side light source.
A liquid crystal display, comprising:
- a liquid crystal display panel;
- a back light module for providing a plane light source, comprising:
- a light-guiding plate having a top surface, a bottom surface and at least a side surface;
- a side light source positioned next to one side surface of the light-guiding plate, wherein light from the side light source is able to enter the side surface of the light-guiding plate and emerges from the top surface after deflection by the bottom surface;
- a bottom light source attached to the bottom surface of the light-guiding plate, wherein light from the bottom light source is able to enter the bottom surface of the light-guiding plate and emerge from the top surface of the light-guiding plate;
- and
- a reflective holder positioned next to the side surface of the light-guiding plate that also encloses the side light source.
A back light module for providing a plane light source, at least comprising:
- a wedge-shaped light-guiding plate having a top surface, a bottom surface and at least a side surface;
- a side light source positioned next to one side surface of the wedge-shaped light-guiding plate, wherein light from the side light source is able to enter the side surface of the wedge-shaped light-guiding plate and emerges from the top surface after deflection by the bottom surface;
- and
- a bottom light source attached to the bottom surface of the wedge-shaped light-guiding plate, wherein light from the bottom light source is able to enter the bottom surface of the wedge-shaped light-guiding plate and emerge from the top surface of the light-guiding plate.
Dependencies are inferred from the claim text.