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Pattern light guide plate, method for manufacturing same, and backlight unit of a liquid crystal display using same

A technology of light guide plate and patterning, applied in the direction of optical components, light guides, optics, etc., can solve problems such as low productivity, increased manufacturing cost, viewing angle, black area and other quality degradation

Inactive Publication Date: 2012-07-25
HB TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the combined light guide plate involves not only an increase in manufacturing cost due to low productivity, but also a deterioration in quality such as viewing angle, black area, etc.
Also, since the combination film having both the prism function and the diffusion function does not include a diffusion film, sheet crushing may occur due to an increase in frictional force between the upper part of the light guide plate and the lower part of the combination film

Method used

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  • Pattern light guide plate, method for manufacturing same, and backlight unit of a liquid crystal display using same
  • Pattern light guide plate, method for manufacturing same, and backlight unit of a liquid crystal display using same
  • Pattern light guide plate, method for manufacturing same, and backlight unit of a liquid crystal display using same

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Embodiment 1

[0074] 7.5 parts by weight of acrylic acid crosslinked particles with an average particle size of 30 μm ( Sekisui Co., Ltd.) added to 100 parts by weight of polymethylmethacrylate (PMMA) resin ( Sumitomo Co., Ltd.), followed by extrusion under clean room conditions to prepare pellets. The pellets were melted through a first extruder with a diameter of 50 mm, and the PMMA resin was melted through a second extruder with a diameter of 150 mm ( Sumitomo Co., Ltd.) to prepare a 6 mm thick bilayer film comprising a substrate layer and a surface layer. At this time, the extrusion ratio of the first extruder and the second extruder was set to 1:100. In addition, the ratio of the thickness of the surface layer to the thickness of the base layer was set to 1:100. After passing through a T-die, the double-layer resin film melted by the extruder is cooled by an embossing roller with engraved lenticular patterns to form a lenticular pattern on the film, thereby making a patterned lig...

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Abstract

A pattern light guide plate of the present invention comprises: a base layer; and a skin layer laminated on an upper surface of the base layer, wherein the skin layer has a lenticular pattern formed in the direction orthogonal to a light incident surface. The light guide plate of the present invention can be used in a liquid crystal display (LCD) as it has a narrow light emitting angle required for one-dimensional dimming or scanning, has superior light transmissivity, has excellent slip property and thus eliminates a protection film, significantly improves reliability, prevents light leakage at a light incident unit, corrects luminance unevenness, and significantly improves workability during processes.

Description

technical field [0001] The invention relates to a patterned light guide plate, a manufacturing method of the light guide plate and a liquid crystal display backlight unit using the light guide plate. More particularly, the present invention relates to a patterned light guide plate having a lenticular pattern formed on a surface of the light guide plate, a manufacturing method of the light guide plate, and a liquid crystal display backlight unit using the light guide plate. Background technique [0002] In general, a liquid crystal display (LCD) refers to a device that displays numbers or images when an electric field is applied to liquid crystals that have an intermediate phase between liquid and solid and are injected between two glass substrates inside the device. Liquid crystal display devices have various advantages such as light weight, low power consumption, and thinness. These advantageous properties of liquid crystal display devices make them useful in many applicat...

Claims

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Application Information

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IPC IPC(8): G02B6/00G02F1/1335
CPCG02B6/0043G02B6/0038G02B6/00G02F1/1335
Inventor 朴种善李璟俊李培旭金星国
Owner HB TECH CO LTD
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