Backlight unit and liquid crystal display device including the same
First Claim
Patent Images
1. A backlight for a liquid crystal display device, comprising:
- a first plurality of light emitting diodes each having a first luminance and a first color rank in chromaticity coordinates;
a second plurality of light emitting diodes each having a second luminance different from the first luminance and a second color rank in chromaticity coordinates different from the first rank in chromaticity coordinates,wherein at least the first and second plurality of light emitting diodes are interspersed with each other to provide an average luminance of the first and second luminances at a target value of luminance that is consistent across the liquid crystal display device, andwherein the first and second plurality of light emitting diodes are respectively grouped together to provide an average color rank of the first and second color ranks in chromaticity coordinates at a single target value of color rank in chromaticity coordinates; and
a third plurality of light emitting diodes having a third luminance equal to the average luminance at the target value.
1 Assignment
0 Petitions
Accused Products
Abstract
A backlight for a liquid crystal display device includes a first plurality of light emitting diodes having a first luminance and a second plurality of light emitting diodes having a second luminance, wherein at least the first and second plurality of light emitting diodes are interspersed with each other to provide an average luminance at or substantially near a predetermined target value of luminance that is consistent across the liquid crystal display device.
11 Citations
14 Claims
-
1. A backlight for a liquid crystal display device, comprising:
-
a first plurality of light emitting diodes each having a first luminance and a first color rank in chromaticity coordinates; a second plurality of light emitting diodes each having a second luminance different from the first luminance and a second color rank in chromaticity coordinates different from the first rank in chromaticity coordinates, wherein at least the first and second plurality of light emitting diodes are interspersed with each other to provide an average luminance of the first and second luminances at a target value of luminance that is consistent across the liquid crystal display device, and wherein the first and second plurality of light emitting diodes are respectively grouped together to provide an average color rank of the first and second color ranks in chromaticity coordinates at a single target value of color rank in chromaticity coordinates; and a third plurality of light emitting diodes having a third luminance equal to the average luminance at the target value. - View Dependent Claims (2, 3)
-
-
4. A backlight for a liquid crystal display device, comprising:
-
a first plurality of light emitting diodes each having a first luminance and a first color rank in chromaticity coordinates; a second plurality of light emitting diodes each having a second luminance different from the first luminance and a second color rank in chromaticity coordinates different from the first color rank in chromaticity coordinates, wherein at least the first and second plurality of light emitting diodes are interposed with each other to provide an average luminance of the first and second luminances at a target value of luminance that is consistent across the liquid crystal display device, and wherein at least the first and second plurality of light emitting diodes are combined with each other to provide an average color rank of the first and second color ranks in chromaticity coordinates at a single target value of color rank in chromaticity coordinates; and a third plurality of light emitting diodes having a third luminance equal to the average luminance at the target value. - View Dependent Claims (5, 6)
-
-
7. A backlight for a liquid crystal display device, comprising:
-
a first plurality of light emitting diodes each having a first luminance and a first color rank in chromaticity coordinates; a second plurality of light emitting diodes each having a second luminance different from the first luminance and a second color rank in chromaticity coordinates a same as the first color rank in chromaticity coordinates; a third plurality of light emitting diodes each having a third luminance and a third color rank in chromaticity coordinates; a fourth plurality of light emitting diodes each having a fourth luminance a same as the third luminance and a fourth color rank in chromaticity coordinates different from the third color rank in chromaticity coordinates, wherein at least the first and second plurality of light emitting diodes are interspersed with each other to provide an average luminance of the first to fourth luminances at a target value of luminance, and wherein at least the third and fourth plurality of light emitting diodes are combined with each other to provide an average color rank of the first to fourth color ranks in chromaticity coordinates at a single target value of color rank in chromaticity coordinates; and a fifth plurality of light emitting diodes having a fifth luminance at the single target value of luminance. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A backlight for a liquid crystal display device, comprising:
-
a first plurality of light emitting diodes each having a first luminance and a first color rank in chromaticity coordinates; a second plurality of light emitting diodes each having a second luminance different from the first luminance and a second color rank in chromaticity coordinates a same as the first color rank in chromaticity coordinates; a third plurality of light emitting diodes each having a third luminance different from each of the first and second luminances and a third color rank in chromaticity coordinates different from each of the first and second color ranks in chromaticity coordinates; and a fourth plurality of light emitting diodes each having a fourth luminance different from each of the first to third luminances and a fourth color rank in chromaticity coordinates different from each of the first to third color ranks in chromaticity coordinates, wherein the first to fourth plurality of light emitting diodes are interspersed with each other to provide an average luminance of the first to fourth luminances at a target value of luminance and an average color rank of the first to fourth color ranks in chromaticity coordinates at a single target value of color rank in chromaticity coordinates; and
a fifth plurality of light emitting diodes having a fifth luminance at the target value of luminance.
-
-
14. A backlight for a liquid crystal display device, comprising:
-
a first plurality of light emitting diodes each having a first luminance and a first color rank in chromaticity coordinates; a second plurality of light emitting diodes each having a second luminance a same as the first luminance and a second color rank in chromaticity coordinates different from the first color rank in chromaticity coordinates; a third plurality of light emitting diodes each having a third luminance different from each of the first and second luminances and a third color rank in chromaticity coordinates different from each of the first and second color ranks in chromaticity coordinates; and a fourth plurality of light emitting diodes each having a fourth luminance different from each of the first to third luminances and a fourth color rank in chromaticity coordinates different from each of the first to third color ranks in chromaticity coordinates, wherein the first to fourth plurality of light emitting diodes are interspersed with each other to provide an average luminance of the first to fourth luminances at a target value of luminance and an average color rank of the first to fourth color ranks in chromaticity coordinates at a single target value of color rank in chromaticity coordinates; and
a fifth plurality of light emitting diodes having a fifth luminance at the target value of luminance.
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeLG Display Co., Ltd.
-
Original AssigneeLG Display Co., Ltd.
-
InventorsKim, Jong-Hyeok, Yoo, Kee Tae
-
Primary Examiner(s)CROWE, DAVID R
-
Application NumberUS12/318,279Publication NumberTime in Patent Office1,449 DaysField of Search362/97.1, 362/97.2, 362/97.3, 362/612, 362/227, 362/230, 362/231, 362/599, 362/561US Class Current362/97.3CPC Class CodesG02F 1/133603 with LEDsG02F 1/133609 including means for improvi...G02F 1/133611 including means for improvi...G02F 1/133613 characterized by the sequen...
