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Light reflector, and planar light source device and illuminating device using light reflector

一种光反射体、光反射的技术，应用在照明装置、电光源、显示装置等方向，能够解决亮度不均匀、出现亮线等问题，达到抑制亮度不均匀、不容易晕光的效果

Inactive Publication Date: 2011-06-22
YUPO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when using conventional white polyester films and white polyolefin films for direct-type light sources in which multiple light sources are installed to increase brightness, there are problems such as bright lines and uneven brightness.

Method used

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  • Light reflector, and planar light source device and illuminating device using light reflector
  • Light reflector, and planar light source device and illuminating device using light reflector
  • Light reflector, and planar light source device and illuminating device using light reflector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、4、5、8

[0135] Compositions (A) and (B) were obtained by blending the materials described in Table 1 in the proportions described in Table 2, and each of the obtained compositions (A) and (B) was melted at 250° C. using three extruders. kneading. Thereafter, it is supplied to one co-extrusion die, and the composition (A) and the composition (B) are laminated in the die in the form of (B) / (A) / (B), and extruded into a sheet form, It cooled to about 60 degreeC with the cooling roll, and obtained the laminated body.

[0136] This laminate was reheated to 145° C., and then stretched at the magnifications described in Table 2 in the machine direction (machine direction: MD) by utilizing the peripheral speed difference of a plurality of roll groups.

[0137] Next, the laminate was reheated to 160° C., and stretched at the ratios listed in Table 2 in the transverse direction (width direction: CD) by a tenter. Thereafter, annealing was performed at 160° C., and then cooled to 60° C., and the...

Embodiment 2

[0139] The materials described in Table 1 were blended in the ratio shown in Table 2 to obtain a composition (A), and the obtained composition (A) was melt-kneaded at 250° C. using an extruder. Thereafter, it was extruded into a sheet form and cooled to about 60° C. with a cooling roll to obtain an unstretched sheet (A) of the composition (A). This sheet was reheated to 145° C., and stretched in the longitudinal direction at the magnifications listed in Table 2 by using the peripheral speed difference of a plurality of roll groups to obtain a longitudinally stretched sheet (A).

[0140] The composition (C) consisting of PP2 listed in Table 1 was melt-kneaded at 250°C using an extruder, and the composition (C) was melt-extruded on both sides of the longitudinally stretched sheet (A) obtained above. , stacked in the form of (C) / (A) / (C). Next, this laminate was reheated to 160° C., and stretched at the ratios listed in Table 2 in the transverse direction with a tenter. Thereaft...

Embodiment 3

[0144] The materials described in Table 1 were blended in the ratio shown in Table 2 to obtain a composition (A), and the obtained composition (A) was melt-kneaded at 250° C. using an extruder. Thereafter, it was extruded into a sheet form and cooled to about 60° C. with a cooling roll to obtain an unstretched sheet (A) of the composition (A). This sheet was reheated to 145° C., and stretched in the longitudinal direction at the magnifications listed in Table 2 by using the peripheral speed difference of a plurality of roll groups to obtain a longitudinally stretched sheet (A).

[0145] Mix the materials described in Table 1 in the ratio described in Table 2 to obtain a composition (B), use an extruder to melt and knead the obtained composition (B) at 250°C, and melt and extrude the composition (B) Both surfaces of the longitudinally stretched sheet (A) obtained above are laminated in a manner of (B) / (A) / (B). Next, the laminate was reheated to 160° C., and stretched at the ra...

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Abstract

A light reflector includes a multilayer film composed of a base material layer (A) and an emission line preventing layer (B) which includes a scale-like light reflecting section, and the light reflector has a reflection angle light quantity ratio of 1.5-6.5. The light reflector does not easily generate an emission line when the light reflector is assembled in a planar light source device and an illuminating device.

Description

technical field [0001] The present invention relates to a light reflector usable as a reflector used in a surface light source device, a reflector, and a light reflection member used in various lighting devices, and to a surface light source device and a lighting device using the light reflector. Background technique [0002] Backlight liquid crystal display devices equipped with built-in light sources, liquid crystal televisions, lighting panels, and the like are widely used. In the built-in light source, the typical composition of the direct type backlight is as follows figure 2 As shown, it includes a housing 11 that functions as a structure and a light reflector, a diffuser 14 , and light sources such as cold cathode lamps 15 . The typical composition of edge-lit backlight is as follows: image 3 As shown, light guide plates, light reflectors 11 , diffusion plates 14 , and light sources such as cold cathode lamps 15 are included on a transparent acrylic plate 13 with h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/08B32B7/02G02F1/13357F21S2/00
CPCG02F1/133605G09F13/04G02B5/0284G02B5/0247G02B5/0866G09F13/14
Inventor 上田隆彦小山广
Owner YUPO CORP
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