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Optical device with self-supporting film assembly

An optical device, self-supporting technology, used in optical components, optics, nonlinear optics, etc., to achieve the effect of improving quality

Inactive Publication Date: 2008-08-27
ROHM & HAAS DENMARK FINANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fabricating thin voided films that meet these requirements is quite challenging, since thin voided films are more prone to shrinkage at elevated temperatures

Method used

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  • Optical device with self-supporting film assembly
  • Optical device with self-supporting film assembly
  • Optical device with self-supporting film assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A single light management arrangement is fabricated by disposing a single voided polymeric diffuser film together with a bead-coated collimating diffuser film, a light directing film and a reflective polarizing film between two co-freestanding optical substrates.

[0060] To make a voided polymeric diffuser film, PET (#7352 from Eastman Chemicals) was dry blended with 22% by weight polypropylene ("PP", Huntsman P4G2Z-159) and 1 part PET at 1.7% by weight to 1 part TiO 2 Concentrate (PET 9663 E0002 from Eastman Chemical). It was then dried in a desiccant dryer at 6°C for 12 hours.

[0061] Extrude PET / PP / TiO with 2-1 / 2" extruder 2Blend to form cast flakes. A 275°C melt stream was fed to a 275°C 7 inch film extrusion die. As the extruded sheet exits the die, it is cast onto quench rolls at 55°C. The PP in the PET matrix has been dispersed into pellets with a size between 10 and 30 microns during extrusion. The final dimensions of the continuous cast sheet were 18 cm...

Embodiment 2

[0069] Another unit light management arrangement was prepared in a similar manner to Example 1, except that edge connection clips were used instead of press-fit pins to secure the PMMA together.

[0070] Control control sample C1

[0071] This comparative example is a light control arrangement arranged in Sharp Electronics' Aquos 20 "DBL TV. The light control arrangement consists of a homogeneous plate diffuser provided in a commercial TV with a thickness of 2.03 mm, except that described in Example 1. The same sequence of light control films arranged outside the voided polymeric diffuser film is superimposed on the plate diffuser.

[0072] Control sample C2

[0073] This comparative example is a light control arrangement in which a single 1 / 16" An acrylic plastic sheet was used as the optically transmissive free-standing substrate and the majority of the optical films were laminated onto it. The 1 / 16" plastic sheet is first cut to the same size as the diffuser in Sharp El...

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Abstract

An optical device comprises a direct backlight lighting device and an optical element comprising an arrangement of one or more optical films confined between two integrally bound optically transmissive substrates that together are self-supporting.

Description

technical field [0001] The present invention relates to an optical display comprising an optical element comprising an arrangement of one or more optical films confined between two integrally bonded light transmissive substrates, said arrangement and The sheets are self-supported; in particular the invention relates to liquid crystal displays (LCDs) which can be used in LCD monitors and LCD televisions. Background technique [0002] Liquid crystal displays (LCDs) are optical displays used in devices such as portable computers, handheld calculators, digital watches, and televisions. Some LCDs include a light source on the side of the display, and a light guide configured to direct light from the light source toward the back of the LCD panel. Other LCDs, such as LCD monitors and LCD televisions (LCD-TVs), are directly illuminated with multiple light sources located behind the LCD panel. This arrangement is more common in larger displays because to achieve a given level of di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357G02B5/02G02F1/1335
CPCG02B5/045G02F2001/133507G02F1/133608Y10T428/31504Y10T428/31507G02F1/133606G02F1/133507G02B5/02G02F1/1335
Inventor T·M·兰尼E·M·贝坦库尔特P·T·阿伊沃德L·S·盖茨
Owner ROHM & HAAS DENMARK FINANCE
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