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Prism sheet and backlight unit including the same

A technology of prism sheets and prisms, applied in prisms, optical components, light guides of lighting systems, etc., can solve problems such as reduced efficiency, and achieve the effects of enhanced efficiency, enhanced polarization efficiency, and enhanced brightness

Inactive Publication Date: 2009-09-30
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a part (L4) of the light output from the light guide plate 206 is not collected in the direction of the LCD panel 100, as shown in FIG. 2C
In other words, part of the light output from the light guide plate 206 is not incident to the LCD panel 100, and therefore, the efficiency of light supplied from the backlight unit 102 to the LCD panel 100 is reduced.

Method used

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  • Prism sheet and backlight unit including the same
  • Prism sheet and backlight unit including the same
  • Prism sheet and backlight unit including the same

Examples

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Embodiment Construction

[0036] Hereinafter, preferred embodiments of the present invention will be explained in more detail with reference to the accompanying drawings.

[0037] image 3 is a sectional view illustrating a backlight unit according to an embodiment of the present invention.

[0038] exist image 3 Among them, a liquid crystal display (hereinafter, referred to as “LCD”) includes an LCD panel 300 and a backlight unit (hereinafter, referred to as “BLU”) 302 .

[0039] This LCD panel 300 comprises lower polarizing film 304, upper polarizing film 306, lower glass substrate 308, upper glass substrate 310, color filter 312, black matrix 314, pixel electrode 316, common electrode 318, liquid crystal layer 320 and TFT array 322.

[0040] The color filter 312 includes sub-color filters corresponding to red, green and blue light.

[0041] The TFT array 322 is used as a switching device to switch the pixel electrode 316 .

[0042] The pixel electrodes 316 and the common electrodes 318 align the...

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Abstract

The present invention relates to a prism sheet comprising: a base film; and a plurality of linearly aligned prisms formed on one side of the base film, wherein one side of each prism is perpendicular to the base film, and, in In each prism, the angle between the vertical plane and the inclined plane is 30° to 45°, and the refractive index of the prism substance is 1.5 to 1.6.

Description

technical field [0001] The present invention relates to a prism sheet and a backlight unit including the same. In particular, the present invention relates to a prism sheet having a side surface perpendicular to a normal of a light guide plate and a backlight unit including the same. Background technique [0002] The backlight unit provides light to a liquid crystal display (hereinafter, referred to as 'LCD'). [0003] Fig. 1 is a block diagram illustrating a conventional liquid crystal device. [0004] In FIG. 1 , the LCD includes an LCD panel 100 and a backlight unit 102 . [0005] The LCD panel 100 displays certain images using light supplied from the backlight unit 102 . [0006] FIG. 2A is a cross-sectional view illustrating a backlight unit. FIG. 2B is a cross-sectional view illustrating the optical film of FIG. 2A. [0007] In FIG. 2A , the backlight unit 102 includes a light source unit 200 , a light guide plate 206 , a reflection sheet 208 and an optical film 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/04G02F1/1335
CPCG02B6/0068G02B6/0046G02B6/0038G02B6/005G02B5/045G02F1/1335
Inventor 李承浩李相坤金康润金昌钟赵炫奭李延勋
Owner LG ELECTRONICS INC
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