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Thin double-sided light guide plate

A light guide plate and bottom surface technology, applied in the field of light guide plates, can solve the problems of limited single-sided light guide plates

Inactive Publication Date: 2011-12-14
SKC HAAS DISPLAY FILMS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Takada et al. (WO2006 / 098479) disclose a method of manufacturing thick LGPs using an extrusion casting process, but this method is also limited to the manufacture of single-sided LGPs
[0007] Thus, while solutions have been proposed for a particular light guide plate and method of making the plate by extrusion, roll-to-roll operations, there is still the possibility of using a single-pass extrusion casting process to efficiently produce The demand for double-sided light guide plate

Method used

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  • Thin double-sided light guide plate
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  • Thin double-sided light guide plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0086] Invention Example 1

[0087] The optical sheet 300 has a length Ls≈957mm, a width Ws≈343mm, and a thickness Ds ranging from 0.1mm to 0.7mm. There are four light guide plate patterns on the optical sheet 300, each having the same length varying between 150mm to 240mm and width varying between 150mm to 320mm. Since all four light guide plates were produced together in a roll-to-roll process, each light guide plate was produced within 1 second at a processing line speed of 250 mm per second. It is conceivable that for a large number of small light guide plates on the same optical sheet 300 and the same patterned roller, for example, the length and width dimensions are about 20mm, and at the same processing line speed, each light guide plate produced requires The time will be shorter.

[0088] Invention Example 2

[0089] The optical sheet 300 has a length Ls≈1436mm, a width Ws≈686mm, and a thickness Ds ranging from 0.1mm to 0.7mm. There are 14 light guide plate pattern...

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PUM

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Abstract

The present invention provides a light guide plate having an input surface for receiving light from a light source, a micro-patterned output surface for emitting light, and a micro-patterned bottom surface opposing to the output surface, made in steps comprising: extruding a first resin into the nip between a first pressure roller and a first patterned roller to form a first layer. Extruding a second resin into the nip between a second pressure roller and a second patterned roller and onto the unpatterned surface of the first layer to form a second layer. The second layer having a pattern transferred from the second patterned roller; the combined first and second layers form an optical sheet comprising a plurality of light guide plate patterns and cutting and finishing the optical sheet into a plurality of double-sided light guide plates having the specified length and width dimensions.

Description

technical field [0001] The present invention generally relates to a light guide plate, and more particularly relates to a double-sided light guide plate and a manufacturing method thereof. Background technique [0002] Liquid crystal displays (LCDs) continue to improve in cost and performance, making them the display technology of choice for many computer, instrumentation, and entertainment applications. Conventional LCD mobile phones, laptops, monitors comprise a light guide plate which receives the light emitted from the light source and redistributes it more or less uniformly through the LCD. The thickness of the existing light guide plate is generally in the range of 0.8mm to 2mm. The light guide must be of sufficient thickness to cooperate effectively with the light source, typically a CCFL or some LED, and then direct as much light as possible to the viewer. Meanwhile, it is difficult and expensive to manufacture a light guide plate with a thickness less than about 0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00G02B5/02
CPCB29D11/00288B29D11/00326G02B6/0065B29D11/00663G02B6/0035G02B6/0076G02B6/00
Inventor H·雷M·R·兰德瑞X-D·米J·格林纳
Owner SKC HAAS DISPLAY FILMS CO LTD