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Optical plate, backlight module including the same, and its production method

A manufacturing method and backlight module technology, which is applied in the field of optical plates, can solve the problems of expensive raw materials, difficult particle dispersion, and difficult diffusion particle dispersion.

Active Publication Date: 2013-07-03
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the diffusion particles are not easy to disperse and the raw materials are expensive, it is necessary to improve the formula and equipment. For example, in the related research on the preparation of diffusion plates by extrusion process, US Patent 2005 / 0257363 and Japanese Patent 2005 / 329696 combine the diffusion particles and Optical resins are molded by extrusion. The disadvantage is that the diffusion particles used are expensive and difficult to disperse. Additional dispersants must be added.

Method used

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  • Optical plate, backlight module including the same, and its production method
  • Optical plate, backlight module including the same, and its production method
  • Optical plate, backlight module including the same, and its production method

Examples

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Embodiment approach

[0023] One embodiment of the present invention provides an optical plate, including a continuous phase composed of thermoplastic polymers and a dispersed phase composed of thermosetting polymers dispersed in the continuous phase.

[0024] The above-mentioned thermoplastic polymer may include polymethacrylic resin, polycarbonate resin, styrene resin, cycloolefin resin or non-crystalline polyester. The above-mentioned thermosetting polymer can be a reactive non-polar polymer. The reactive polymer here is a polymer with functional groups, such as reactive polymethacrylic resins, polycarbonate resins, styrene resins, cycloolefin resins, etc. Amorphous polyester, epoxy or polysiloxane. When the weight percentage of the thermoplastic polymer is approximately 40-99.5%, and the weight percentage of the thermosetting polymer is approximately 0.5-60%, the above-mentioned optical plate can be used as a diffuser plate. When the weight percentage of the thermoplastic polymer is approxima...

Embodiment 1

[0034] Firstly, optical-grade PMMA raw material plastic pellets are pre-mixed evenly with 0.3% by weight of reactive epoxy resin (containing bridging agent). Afterwards, the premixed plastic pellets are heated and extruded into pellets by a twin-screw extruder, so that the reactive epoxy resin is uniformly dispersed in the PMMA continuous phase in the twin-screw extruder and completely reacted. Finally, the extruded particles were injection-molded to make a square plate-shaped test piece material (width×thickness 80mm×2mm), so as to obtain an epoxy-type diffusion plate containing 0.3wt% dynamic cross-linked diffusion particles and test its overall Light transmittance (TT) and haze (Hz).

Embodiment 2

[0036] An epoxy diffuser plate containing 0.5 wt% of dynamically cross-linked diffuser particles was prepared according to the same material and method as in Example 1, and its total light transmittance (TT) and haze (Hz) were tested.

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Abstract

The invention provides an optical plate, which comprises a continuous phase formed by thermoplastic polymers and a disperse phase formed by thermosetting polymers, wherein the disperse phase is distributed in the continuous phase. The invention provides a method for manufacturing the optical plate.

Description

【Technical field】 [0001] The invention relates to an optical plate, in particular to a two-phase dynamic cross-linked optical plate. 【Background technique】 [0002] In recent years, due to the active investment in research and development and the adoption of large-scale production by major manufacturers, the quality of liquid crystal displays (LCDs) has been continuously improved, and the application fields of liquid crystal displays have been rapidly expanded. While LCD strives to open up new fields, the high brightness, low cost, low power consumption and thinness of backlight technology also play an important role. The backlight module is the light source of the liquid crystal display, and is composed of components such as cold cathode tubes, light guide plates, diffusion plates, and rhombic lenses. However, the traditional manufacturing process is difficult and time-consuming to assemble, resulting in high costs. For backlight module manufacturers, they all try to simp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/04G02B6/00G02F1/13357B29C47/40B29C35/02B29C35/08
Inventor 蔡坪芫陈俊彦吕杰夫陈忆明蔡世荣
Owner IND TECH RES INST