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Back-lighting unit and liquid crystal display using the same

A technology of backlight unit and liquid crystal display, applied in mechanical equipment, optical components, lighting and heating equipment, etc., can solve the problem of lack of proper proportion of backlight unit structure, and achieve the enhancement of total module strength, wide color reproduction range, wide and high brightness Effect

Inactive Publication Date: 2006-06-07
NEC LCD TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The second problem is that the backlight unit lacks proper proportions in the structure
[0010] The reason for the above problem is that the components of the backlight unit are concentrated in one area close to the second reflector 105

Method used

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  • Back-lighting unit and liquid crystal display using the same
  • Back-lighting unit and liquid crystal display using the same
  • Back-lighting unit and liquid crystal display using the same

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Embodiment Construction

[0056] Hereinafter, typical embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0057] First, a backlight unit according to a first exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0058] Such as Figure 1A and 1B As shown in , the backlight unit 10 of this embodiment includes: a first light guide plate 6, which emits light entering the light guide plate 6 from one of its main front surfaces; an LED array substrate 2 arranged on the back surface of the first light guide plate 6 , which includes three colors of LED1 (red LED, green LED and blue LED) disposed thereon; the first optical component 3, which reflects the light emitted by the LED1 on the LED array substrate 2; A plurality of mixed second light guide plates 4a and 4b, the colored light beams emitted by the red LEDs, green LEDs and blue LEDs on the LED array substrate 2 respectively enter...

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Abstract

The colored light beams respectively from the LEDs formed on the LED array substrate are made to enter one side of the second light guide plate for color mixing provided on either side of the LEDs. In each of the second light guide plates, color mixing of the respective colored light beams occurs as the distance from the one side increases, whereby white light is obtained. The white light is guided from the other side of the second light guide plate, and is reflected by the second reflection plate, and then enters any one of two opposite sides of the first light guide plate. The white light entering the first light guide plate is emitted from the front surface of the first light guide plate.

Description

technical field [0001] The invention relates to a backlight unit and a liquid crystal display device using the backlight unit. In particular, the present invention relates to a backlight unit using light emitting diodes of various colors as a light source and a liquid crystal display device using the backlight unit. Background technique [0002] For a liquid crystal display device, since it is a display device that does not emit light by itself, a front light unit or a backlight unit is usually used to improve the visibility and brightness of the device. As a light source for the backlight unit constituting the backlight unit, fluorescent lamps have been mainly used so far, but it has been proposed to use light emitting diodes (LEDs), which have advantages of long life and excellent luminous efficiency. [0003] In "High-efficiency slim LED backlight system with mixing lightguide" (Martynov, SID03 DIGEST, 43.3, pp. 1259-1261) a backlight unit using light-emitting diodes as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335F21S2/00F21S8/04F21V8/00F21Y101/02G02F1/13357
CPCG02B6/0031G02B6/0043G02B6/0068G02B6/0076G02B6/0078G02F1/133603G02F1/1335
Inventor 壹岐成嗣森田敏之
Owner NEC LCD TECH CORP
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