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optical film

A technology of optical film and functional film, which is applied in the field of optical film, can solve problems such as poor visual effects, and achieve the effect of optimizing the quality of displayed images

Active Publication Date: 2021-06-22
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 Embodiment 1 includes a light guiding structure layer, a first leveling layer (refractive index is about 1.6), a first diffraction grating layer extending along the first direction D1, and a second leveling layer (The index of refraction is about 1.5). Wherein, the height of each light-guiding microstructure in the light-guiding structure layer is about 15 microns, the width is about 5 microns, the distance between two adjacent light-guiding micro-structures 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 to 11 with different sizes as shown in Table 1, and arranged periodically in sequence, and the number of gratings can be adjusted according to needs.

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

Embodiment 2

[0063] The optical film disclosed in Embodiment 2 includes a light guiding structure layer, a first leveling layer (refractive index is about 1.6), a first diffraction grating layer with a plurality of extending along the first direction D1, and a second leveling 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 to 11 with different sizes shown in Table 1, and arranged periodically in sequence, and the number of gratings can be adjusted according to needs. The second leveling layer contains phthalocyanine dye.

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

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Abstract

The invention relates to an optical film. The optical film includes a light guide structure layer, a first leveling layer, a plurality of first diffraction gratings and a second leveling layer. The light guide structure layer includes a plurality of light guide microstructures, wherein the aspect ratio of each light guide microstructure is between 1.5 and 6. The first filling layer is arranged on the light guiding structure layer, which can flatten the light guiding structure layer, and the refractive index of the first filling layer is different from that of the light guiding structure layer. A plurality of first diffraction gratings with a first direction are formed on the first leveling layer. The second filling layer is disposed on the first diffraction gratings, wherein the second filling layer has a different refractive index from the first diffraction gratings.

Description

technical field [0001] The invention relates to an optical film used for a liquid crystal display, in particular to an optical film capable of reducing large viewing angle deviation, light leakage in a dark state, and increasing the color of each viewing angle and the uniformity of a dark state picture. Background technique [0002] Since the current liquid crystal display (LCD) is a non-self-luminous display, the backlight is easily affected by the asymmetry of the liquid crystal molecules after the backlight passes through the liquid crystal panel, so that the picture quality of the front viewing angle and the large viewing angle have a large drop. [0003] Especially when displaying a black picture, because the backlight of the conventional liquid crystal display cannot be turned off, and the light is only shielded by switching the dark state of the liquid crystal panel. Color shifts or unevenness due to different viewing angles. Please refer to figure 1 , which is the ...

Claims

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Application Information

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Patent Type & Authority Patents(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