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Optical reflecting film used for backlight units

A technology of optical reflection and backlight module, which is applied in the direction of optics, optical components, chemical instruments and methods, etc. It can solve the problems of scratches on reflective film, affecting the brightness and picture quality of backlight and display, and wrinkles, so as to improve the reflectivity , simple structure, and the effect of improving stiffness

Active Publication Date: 2013-05-08
昆山乐凯锦富光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, in order to improve the reflectivity, generally by adding particles or making the reflective film produce micropores or bubbles, the reflection of the particle interface or the reflection of the interface between the substrate resin of the film and the micropores or bubbles is used to improve the reflectivity. Although these methods can improve the reflectivity of the film, as the porosity in the reflective film increases, the reflective film becomes soft, causing the reflective film to be easily scratched and wrinkled during use and processing, which affects the brightness of the backlight and the display. and picture quality

Method used

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  • Optical reflecting film used for backlight units
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Configuration of H-layer coating solution:

[0035] Add methyl ethyl ketone and toluene to the biphenyl resin, dissolve the resin, then add 10 micron titanium dioxide particles into the dissolved resin, then add leveling agent and initiator (or curing agent), and disperse evenly under high stirring. Obtain the H-layer coating solution whose weight content of titanium dioxide is 40%, and set aside.

[0036] 2. Configuration of L layer coating solution:

[0037] Dilute the fluorine-containing resin with methyl ethyl ketone and toluene, then add leveling agent and initiator (or curing agent), and disperse evenly under high-speed stirring to obtain a .L-layer coating solution for later use.

[0038] 3. Preparation of reflective film:

[0039] Crystallize polyethylene terephthalate polyester chips with an intrinsic viscosity of 0.65dl / g at 170°C, dry, and then feed the crystallized material into a substrate layer extruder for melt extrusion at 275°C ; The polyethylene ...

Embodiment 2

[0041] 1. Configuration of H-layer coating solution:

[0042] Add methyl ethyl ketone and toluene to the biphenyl resin, dissolve the resin, then add 25 micron titanium dioxide particles into the dissolved resin, then add leveling agent and initiator (or curing agent), and disperse evenly under high stirring. Obtain the H-layer coating solution whose weight content of titanium dioxide is 50%, and set aside.

[0043] 2. Configuration of L layer coating solution:

[0044] Dilute the fluorine-containing resin with methyl ethyl ketone and toluene, then add leveling agent and initiator (or curing agent), and disperse evenly under high-speed stirring to obtain a .L-layer coating solution for later use.

[0045] 3. Preparation of reflective film:

[0046] Crystallize polyethylene terephthalate polyester chips with an intrinsic viscosity of 0.65dl / g at 170°C, dry, and then feed the crystallized material into a substrate layer extruder for melt extrusion at 275°C ; The polyethylene ...

Embodiment 3

[0048] 1. Configuration of H-layer coating solution:

[0049] Add methyl ethyl ketone and toluene to the biphenyl resin, dissolve the resin, then add 40 micron titanium dioxide particles into the dissolved resin, then add leveling agent and initiator (or curing agent), and disperse evenly under high stirring. Obtain the H-layer coating solution whose weight content of titanium dioxide is 50%, and set aside.

[0050] 2. Configuration of L layer coating solution:

[0051] Dilute the fluorine-containing resin with methyl ethyl ketone and toluene, then add leveling agent and initiator (or curing agent), and disperse evenly under high-speed stirring to obtain a .L-layer coating solution for later use.

[0052] 3. Preparation of reflective film:

[0053] Crystallize polyethylene terephthalate polyester chips with an intrinsic viscosity of 0.65dl / g at 170°C, dry, and then feed the crystallized material into a substrate layer extruder for melt extrusion at 275°C ; The polyethylene ...

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Abstract

The invention relates to an optical reflecting film used for backlight units. The optical reflecting film structurally comprises base material, a reflecting layer, an H layer and an L layer in sequence, wherein the base material is a polyester layer in which no pore exists, the reflecting layer is a polyester layer in which pores exist, and the H layer has a higher refractive index relative to the L layer. The reflecting film is simple in structure, the reflectivity is over 98%, and when a high reflectivity is maintained, the reflecting film further has high stiffness, so that the reflecting film is beneficial for later-period using and processing of the reflecting film and the improvement of light saturation of a liquid crystal display frame, and can be widely applied to various products which have the requirements for light reflecting and include the backlight units of a liquid crystal display (LCD) and the like.

Description

technical field [0001] The invention relates to an optical reflection film for a backlight module. Background technique [0002] For a long time, flat panel displays have been widely used in TVs, computer monitors, notebook computers, mobile phones, digital cameras, handheld computers, GPS navigators, etc. The picture light source of these LCDs is provided by the backlight module. The performance of the backlight will not only directly affect the image quality of the LCD, especially the brightness of the backlight will directly affect the brightness of the LCD surface. [0003] The liquid crystal backlight system is mainly composed of a light source, a light guide plate, and various optical films. It has the characteristics of high brightness, long life, and uniform light emission. With the continuous development of LCD modules in the direction of brighter, lighter and thinner, edge-lit CCFL backlights have become the mainstream of backlight development. [0004] The main ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G02B1/04B32B27/06
Inventor 鲁若娜孟亮娄永峰
Owner 昆山乐凯锦富光电科技有限公司
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