Backlight assembly and a liquid crystal display device using the same
AssigneeTte Technology, Inc.
InventorsMichel Cadio, Estill Thone Hall, Jr., Brent Hoffman
Life of this patent
Estimating the term…
Abstract
A backlight assembly for a display panel includes a light pipe that is divided into a plurality of horizontal portions, a light source including a plurality of selectively illuminated lamps arranged at lateral sides of each of the horizontal portions for emitting light into the light pipe, a plurality of diffusion surfaces, each of the diffusion surfaces being provided on a selected area of a respective one of the plurality of the horizontal portions, wherein each of the diffusion surfaces causes light to be emitted from the selected area of the respective horizontal portion when the light pipe is illuminated by the lamp associated therewith.
Claims22
A liquid crystal display (LCD) device, comprising:
- an LCD panel having a screen with a plurality of displaying areas;
- a light filter layer provided behind the LCD panel;
- a light guide assembly provided behind the light filter layer, the light guide assembly including a light pipe that is divided into a plurality of horizontal portions;
- a light source including a plurality of selectively illuminated lamps arranged at lateral sides of each of the horizontal portions for emitting light into the light pipe;
- a plurality of diffusion surfaces, each of the diffusion surfaces being provided on a selected area of a respective one of the plurality of the horizontal portions,
- wherein each of the diffusion surfaces causes light to be emitted from the selected area of the respective horizontal portion when the light pipe is illuminated by the lamp associated therewith,
- wherein each of the plurality of horizontal portions is further divided at a center thereof to create a left side and a right side so that the left side and the right side can be lighted independently, and
- wherein each center-divided horizontal portion includes a top edge, a bottom edge, a middle edge and a side edge, wherein the top, bottom and middle edges are each a high-gloss polished surface, and the side edge faces the light source and is free of any reflective or diffusion coating.
A backlight assembly for a display panel, comprising:
- a light pipe that is divided into a plurality of horizontal portions;
- a light source including a plurality of selectively illuminated lamps arranged at lateral sides of each of the horizontal portions for emitting light into the light pipe;
- a plurality of diffusion surfaces, each of the diffusion surfaces being provided on a selected area of a respective one of the plurality of the horizontal portions,
- wherein each of the diffusion surfaces causes light to be emitted from the selected area of the respective horizontal portion when the light pipe is illuminated by the lamp associated therewith,
- wherein each of the plurality of horizontal portions is further divided at a center thereof to create a left side and a right side so that the left side and the right side can be lighted independently, and
- wherein each center-divided horizontal portion includes a top edge, a bottom edge, a middle edge and a side edge, wherein the top, bottom and middle edges are each a high-gloss polished surface, and the side edge faces the light source and is free of any reflective or diffusion coating.
Dependencies are inferred from the claim text.