Surface light source using light emitting diode and liquid crystal display backlight unit employing the same

A technology of light emitting diode and liquid crystal display, applied in the field of LCD backlight unit

Inactive Publication Date: 2007-07-18
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, in this conventional technology, two adjacent green LEDs, one red LED and one blue LED form a bundle, namely B LED, G LED, G LED and R LED units, so that the A large number of LEDs are required per unit area of ​​the light source 400
Therefore, there is still room for improvement in the traditional technology to realize surface light source at low cost

Method used

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  • Surface light source using light emitting diode and liquid crystal display backlight unit employing the same
  • Surface light source using light emitting diode and liquid crystal display backlight unit employing the same
  • Surface light source using light emitting diode and liquid crystal display backlight unit employing the same

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Embodiment Construction

[0039] Now, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0040]As shown in FIG. 5 , a surface light source 1 using LEDs for reducing color speckle includes a plurality of light source beams 10 arranged along a first direction and a second direction. Each of the light source bundles 10 consists of green GLEDs, red R LEDs and blue B LEDs arranged in a triangle. The surface light source 1 also comprises a first array 20 of beams 10 arranged in rows along a first direction and inverted alternately with respect to the first direction.

[0041] As shown in FIG. 5 , the x-axis is assumed to be the first direction, and the y-axis is assumed to be the second direction.

[0042] Therefore, the plurality of light source beams 10 arranged in the first array 20 are arranged in a row along the first direction x-axis and alternately inverted with respect to the first direction.

[0043] Thus, assume that the first...

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Abstract

A surface light source capable of reducing color stains with reduced number of light emitting diodes and manufactured at low costs, and a liquid crystal display backlight unit employing the same. The surface light source includes a plurality of light source clusters arrayed along first and second directions, each of the clusters including three light emitting diodes disposed in a triangular arrangement, the three light emitting diodes including green, red and blue light emitting diodes. The surface light source also includes a first array of the clusters lined along and inverted alternately about the first direction; and a second array of the clusters lined along and inverted alternately about the second direction, where the first array is perpendicular to the second array. The invention reduces color stains to achieve uniform white light and reduces the number of light emitting diodes to manufacture a product at low costs.

Description

[0001] This application claims the benefit of Korean Patent Application No. 2006-0002842 filed with the Korean Intellectual Property Office on Jan. 10, 2006, the disclosure of which is incorporated herein by reference. technical field [0002] The present invention relates to a surface light source for reducing color mottle using a light emitting diode (hereinafter referred to as LED) and a liquid crystal display (hereinafter referred to as LCD) backlight unit using the same. More particularly, the present invention relates to a surface light source and an LCD backlight unit using the surface light source, wherein LEDs are arranged in a triangular arrangement in which clusters are alternately inverted to each other, thereby significantly reducing color spots and allowing the use of Few LEDs to reduce manufacturing cost. Background technique [0003] With the use of mercury gas, cold cathode fluorescent lamps (CCFLs) tend to pollute the environment, have a slow response speed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21S4/00G02F1/1335G02F1/13357F21Y105/00F21Y101/02H01L33/60
CPCG02F2001/133613G02F1/133603G09G3/3426G02F1/133609G02F1/133613G02F1/1335
Inventor 李贤镐权宰郁朴明报尹亨元梁润卓
Owner SAMSUNG ELECTRO MECHANICS CO LTD
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