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Optical film

A technology of optical film and functional film, applied in the field of optical film, can solve problems such as poor visual effect, and achieve the effect of optimizing display image quality

Active Publication Date: 2018-06-29
BENQ MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the aforementioned poor visual effects under different viewing angles, the present invention provides an optical film

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0058] The optical film disclosed in the first embodiment includes a light guide structure layer, a first filling layer (with a refractive index of about 1.6), a plurality of first diffraction grating layers extending along the first direction D1, and a second filling layer (The refractive index is about 1.5). Wherein, the height of each light guide microstructure in the light guide structure layer is about 15 microns, the width is about 5 microns, the distance between two adjacent light guide microstructures is about 24 microns, and the aspect ratio is 3. The layer contains an azo dye. The first diffraction gratings can be selected from gratings 1-11 with different sizes as shown in Table 1, and arranged periodically in sequence, and the number of gratings can be adjusted as needed.

[0059] The optical film of Example 1 was adhered to a liquid crystal display (model: BenQGW2270, purchased from Taiwan), and optical properties were tested. The test results are shown in Table 2 b...

Embodiment 2

[0063] The optical film disclosed in the second embodiment includes a light guide structure layer, a first filling layer (with a refractive index of about 1.6), a first diffraction grating layer having a plurality of extending along the first direction D1, and a second filling layer ( The refractive index is about 1.5). Among them, the height of each light guide microstructure in the light guide structure layer is about 15 microns, the width is about 5 microns, the distance between two adjacent light guide microstructures is about 24 microns, and the aspect ratio is 3. The layer contains an azo dye. The first diffraction gratings can be selected from gratings 1-11 with different sizes as shown in Table 1 and arranged periodically in sequence, and the number of gratings can be adjusted as needed. The second leveling layer contains phthalocyanine dye.

[0064] The optical film of Example 2 was adhered to a liquid crystal display (model: BenQGW2270, purchased from Taiwan), and opt...

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Abstract

The invention relates to an optical film. The optical film comprises a light guiding structure layer, a first filling and leveling-up layer, a plurality of first diffraction optical gratings and a second filling and leveling-up layer. The light guiding structure layer comprises a plurality of light guiding micro-structures, wherein the depth-width ratio of each light guiding micro-structure is between 1.5 and 6. The filling and leveling-up layer is arranged on the light guiding structure layer, thus, the light guiding structure layer is planarized, the refractive index of the first filling andleveling-up layer is different from that of the light guiding structure layer. The first diffraction optical gratings in a first direction are formed on the first filling and leveling-up layer. The second filling and leveling-up layer is arranged on the first diffraction optical gratings, and the refractive index of the second filling and leveling-up layer is different from that of the first diffraction optical gratings.

Description

Technical field [0001] The invention relates to an optical film for a liquid crystal display, in particular to an optical film that can reduce large-view role deviation, dark state light leakage, and increase the color of each viewing angle and the uniformity of dark state pictures. Background technique [0002] Since the current liquid crystal display (LCD) is a non-self-luminous display, the backlight is susceptible to the asymmetry of the liquid crystal molecules after passing through the liquid crystal panel, and the image quality of the front viewing angle and the large viewing angle has a large difference. [0003] Especially when displaying a black screen, the backlight of the existing LCD cannot be turned off, and only the dark state shading is switched by the LCD panel. Therefore, there are varying degrees of light leakage under various viewing angles, which makes the screen contrast and Color shifts or unevenness due to different viewing angles. Please refer to figure 1 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335G02B5/18
CPCG02B5/1866G02F1/133504G02F1/133524
Inventor 郭真宽洪群泰沈俊男林孟颉林佳锋郑孟嘉
Owner BENQ MATERIALS