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Backlight unit and liquid crystal display device having the same

A technology of backlight unit and light guide plate, which is applied in the direction of optical components, lighting devices, fixed lighting devices, etc. It can solve problems such as difficulty in manufacturing thin LCD devices, thick backlight units, increasing the distance between lamps and optical sheets, and achieve uniform brightness Effect

Active Publication Date: 2010-03-03
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the distance between the lamp and the optical sheet will result in a thicker backlight unit, making it difficult to manufacture thin LCD devices

Method used

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  • Backlight unit and liquid crystal display device having the same
  • Backlight unit and liquid crystal display device having the same
  • Backlight unit and liquid crystal display device having the same

Examples

Experimental program
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Embodiment Construction

[0033] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings. The embodiments described below are exemplary, as understood by those of ordinary skill in the art. Therefore, those skilled in the art should understand that these embodiments can be implemented in different ways, and are not limited to what is described here. In the drawings, the size and thickness of the device are exaggerated for convenience. Wherever possible, the same reference numbers will be used throughout the specification, including the drawings, to refer to the same or like parts.

[0034] image 3 is an exploded perspective view showing the LCD device according to the first embodiment. Figure 4 yes means image 3 A cross-sectional view of the LCD device shown in . Figure 5 yes means image 3 A plan view of the LCD device shown in . Image 6 yes means image 3 A perspective view of the light source module included in...

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Abstract

A backlight unit and an LCD device produce a more uniform brightness by reducing or preventing bright lines occurring at the location of each LED device. The backlight unit includes a bottom cover defining a plurality of luminescent regions in first and second directions perpendicular to each other; a plurality of light source modules arranged in the plural luminescent regions and each including alight guide plate and an LED array disposed at the side of the light guide plate in a boundary region adjacent at least one of the luminescent regions; an optical sheet disposed over the light sourcemodules including a first light source module and a second light source module. The second light guide plate of the second light source module overlaps an incident portion of first light guide plateof the first light source module to cover a first LED array of the first light source module. Accordingly, the backlight unit can prevent the generation of bright lines and hot spots caused when the light guide plate does not cover the LED array. As a result, the LCD device may improve images of uniform brightness.

Description

[0001] This application claims the benefit of Korean Patent Application Nos. 10-2008-0082859 and 10-2008-0100490 filed on Aug. 25, 2008 and Oct. 14, 2008, respectively, each of which is hereby incorporated by reference in its entirety . technical field [0002] The present application relates to a liquid crystal display device having a backlight unit, and more particularly, to a liquid crystal display device having a backlight unit realizing small size and uniform brightness. Background technique [0003] As information dissemination increases in society, various display devices capable of displaying information have been developed. These display devices include liquid crystal display (LCD) devices, organic electroluminescence display devices, plasma display devices and field emission display devices. LCD devices tend to be thinner, smaller, and offer low power drive and full color schemes. Accordingly, LCD devices have been used in various applications, such as mobile pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/00F21V15/02F21V19/00F21V8/00G02F1/13357G02F1/133F21Y101/02
CPCG02F1/133524G02F1/133603G02F1/133611
Inventor 李仙花姜文植
Owner LG DISPLAY CO LTD
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