Backlight unit for display device
AssigneeLG Electronics Inc.
InventorsUihyung LEE, Minho KIM, Geunhwan KIM
Life of this patent
Estimating the term…
Abstract
A backlight unit for display device includes: a plurality of light sources arranged in a matrix pattern, each of the light sources including a red light emitting diode (LED), a green light emitting diode, and a blue light emitting diode; a diffuser plate configured to receive light from the light sources; and at least one optical sheet between a display panel and the diffuser plate, wherein a light-emitting area of the red light emitting diode is larger than a light-emitting area of the green light emitting diode and a light-emitting area of the blue light emitting diode, and an arrangement of the red, green, and blue light emitting diodes substantially forms a perimeter of a square in a planar view.
Claims20
A backlight unit for a display device, comprising:
- a substrate;
- a plurality of light sources disposed on the substrate in a matrix pattern, each of the light sources comprising a red light emitting diode (LED), a green light emitting diode, and a blue light emitting diode;
- a diffuser plate configured to diffuse light emitted from the plurality of light sources;
- and at least one optical sheet disposed between the diffuser plate and a display panel,
- wherein a light-emitting area of the red light emitting diode is larger than a light-emitting area of the green light emitting diode and larger than a light-emitting area of the blue light emitting diode to compensate for efficiency droop of the red light emitting diode, and
- wherein the red, green, and blue light emitting diodes are arranged adjacent to each other to form a single pixel unit.
A backlight unit for a display device, comprising:
- a plurality of light sources arranged in a matrix pattern, each light source comprising a red light emitting diode, a green light emitting diode, and a blue light emitting diode;
- and an optical stack disposed over the plurality of light sources, wherein a light-emitting area of the red light emitting diode is larger than light-emitting areas of the green and blue light emitting diodes, wherein the red, green, and blue light emitting diodes are clustered together to define a combined light-emitting surface having a substantial square shape in a plan view to minimize color deviation at an edge of the light source, and wherein an aspect ratio of the combined light-emitting surface (defined as a ratio of a total width to a total length) is in a range of about 0.75 to about 1.25.
A display device comprising:
- a display panel;
- and
- a backlight unit providing light to the display panel, the backlight unit comprising:
- a substrate;
- and
- an array of RGB LED packages mounted on the substrate,
- wherein each RGB LED package includes a red LED chip, a green LED chip, and a blue LED chip,
- wherein an active area of the red LED chip is larger than an active area of the green LED chip and an active area of the blue LED chip, and
- wherein the red, green, and blue LED chips are arranged to form a quadrilateral cluster having a width and a length that are substantially equal.
Dependencies are inferred from the claim text.