KR101768616B1 - Film for Display, Display, and Manufacturing Methods Thereof - Google Patents

Film for Display, Display, and Manufacturing Methods Thereof Download PDF

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Publication number
KR101768616B1
KR101768616B1 KR1020150120718A KR20150120718A KR101768616B1 KR 101768616 B1 KR101768616 B1 KR 101768616B1 KR 1020150120718 A KR1020150120718 A KR 1020150120718A KR 20150120718 A KR20150120718 A KR 20150120718A KR 101768616 B1 KR101768616 B1 KR 101768616B1
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South Korea
Prior art keywords
viewing angle
display
transparent
polymer layer
transparent polymer
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KR1020150120718A
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Korean (ko)
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KR20160042380A (en
Inventor
이휘득
오사무 사토
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엘지디스플레이 주식회사
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F293/00—Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/04—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers only
    • C08G65/06—Cyclic ethers having no atoms other than carbon and hydrogen outside the ring
    • C08G65/08—Saturated oxiranes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/153—Constructional details

Abstract

An object of the present invention is to obtain a display film capable of controlling a viewing angle with respect to all directions of a display while controlling a viewing angle with high accuracy.
The display film according to the present invention is a display film provided on a display surface to control a viewing angle. The display film includes a transparent polymer layer formed from a transparent polymer material, a plurality of irregularly arranged transparent polymer layers A hollow columnar body, and a colored material filled in each of the columnar bodies.

Description

≪ Desc / Clms Page number 1 > Display Film, Display,

The present invention relates to a display film attached to a display surface to control a viewing angle, a display having a function of controlling a viewing angle, and a manufacturing method thereof.

Conventionally, as a technique for controlling the viewing angle in the left and right direction of a display, a viewing angle control film having a microlouver in which a light transmitting layer composed of a transparent resin or the like and a light shielding layer composed of black ink and a colored resin are alternately arranged (See, for example, Non-Patent Document 1). The micro louvers are formed by laminating black ink between transparent and thin films, and then cutting them in the vertical direction.

Also, a VIC (Viewing Image Control) technique as shown in FIG. 10 is known (see, for example, Patent Document 1). Specifically, the VIC technology controls a viewing angle by adding a VIC pixel for VIC control in one main pixel (RGB) and irradiating high luminance white light in the right and left viewing angle directions.

Furthermore, a viewing angle control (VAC) technique as shown in Fig. 11 is known. Specifically, the VAC technology controls a viewing angle by attaching a liquid crystal panel (VAC panel) capable of controlling the viewing angle in the left and right direction to a conventional LCD (Liquid Crystal Display) panel (main panel) .

Patent Document 1: Korean Patent No. 10-2010-0069430 Patent Document 2: International Patent Publication No. 2007/178731

Non-Patent Document 1: Unknown author, "New Product Information", [online], [Search September 25, 1996], Internet <URL: http://www.mmm.co.jp/news/2011/info/ 20111020.html>

However, the prior art has the following problems.

That is, in the viewing angle control film having the micro louver shown in the non-patent document 1, since the micro louver is fixed, there is a problem that the viewing angle other than the left and right direction can not be controlled.

Also, the VIC technique shown in Patent Document 1 has a problem that it is not possible to control the viewing angles other than the left and right directions as in the non-patent document 1. [ In addition, since the VIC technique irradiates white light of high luminance in the left and right viewing angle directions from the viewing angle control pixel, the contrast ratio (CR) is lowered and the ratio of transmittance reduction is large (for example, 25% or more) There is also.

Also, the VAC technology shown in Patent Document 2 has a problem that it is not possible to control the viewing angles other than the left and right directions as in the non-patent document 1. In addition, since VAC technology has a two-layered panel structure, cost competitiveness is low in terms of weight, thickness, cost, and process. Further, there is also a problem that control of viewing angle by a liquid crystal panel is limited in control capability.

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a display film, a display, and a manufacturing method thereof that can control a viewing angle with respect to all directions of a display while controlling a viewing angle with high accuracy do.

The display film according to the present invention is a display film provided on a display surface to control a viewing angle. The display film includes a transparent polymer layer formed from a transparent polymer material, and a transparent polymer layer arranged irregularly A plurality of hollow pillar-shaped bodies arranged vertically, and a colored material filled in each of the columnar bodies.

A method of manufacturing a display film according to the present invention is a method of manufacturing a display film that is installed on a display surface to control a viewing angle, the method comprising: forming a first transparent sheet- Filling each of the plurality of hollow cylindrical bodies formed in the transparent polymer layer with a colored material, and providing a second transparent sheet on the side opposite to the first transparent sheet of the transparent polymer layer will be.

According to the display film of the present invention, a transparent polymer layer formed from a transparent polymer material, a plurality of hollow pillar-shaped bodies irregularly arranged in a transparent polymer layer for controlling a viewing angle from a front direction, Colored material.

According to the method for producing a display film according to the present invention, a transparent polymer layer is formed on a first transparent sheet by a block copolymer in which a hydrophilic polymer and a hydrophobic polymer are connected to each other, and then a plurality of hollow pillar- Each of the upper bodies is filled with a colored material.

Therefore, the viewing angle can be controlled with respect to all directions of the display, and the viewing angle can be controlled with high accuracy.

1 is a perspective view showing a display film according to Embodiment 1 of the present invention.
2 is an explanatory view showing a manufacturing process of a display film according to Embodiment 1 of the present invention.
3 is a diagram showing a block copolymer constituting a display film according to Embodiment 1 of the present invention.
4 is a plan view showing a display film according to Embodiment 1 of the present invention.
5 is a side view showing a display film according to Embodiment 1 of the present invention.
6 is an explanatory view showing a time control image of a display film according to Embodiment 1 of the present invention;
7 is an explanatory view showing an effect of a display film according to Embodiment 1 of the present invention;
8 is a perspective view showing a viewing angle control panel of a display according to Embodiment 2 of the present invention.
9 is another perspective view showing a viewing angle control panel of a display according to Embodiment 2 of the present invention.
10 is an explanatory view showing a conventional VIC technique;
11 is an explanatory diagram showing a conventional VAC technique;

delete

delete

delete

&Lt; Embodiment 1 >

1 is a perspective view showing a display film according to Embodiment 1 of the present invention. In Fig. 1, the display film is provided on a surface of a display (not shown) to control the viewing angle.

The display film also includes a transparent polymer layer 11 formed from a transparent polymer material and a plurality of hollow columnar bodies 12 irregularly arranged in the transparent polymer layer 11 to control the viewing angle from the front direction, (13) filled in each of the columnar bodies (12). Although the columnar bodies 12 are shown as being regularly formed in Fig. 1, the columnar bodies 12 are irregularly arranged in the entire display film.

Next, the manufacturing process of the display film shown in Fig. 1 will be described with reference to Figs. 2 and 3. Fig. 2 is an explanatory view showing a manufacturing process of a display film according to Embodiment 1 of the present invention. 3 is a diagram showing a block copolymer constituting the display film according to Embodiment 1 of the present invention.

2, a block copolymer to which a hydrophilic polymer and a hydrophobic polymer are connected, specifically, a hydrophilic polyethylene oxide (PEO) and a hydrophobic poly (methacrylate) (PMA ) Is applied to form a transparent polymer layer 11 (Fig. 2 (a)).

At this time, due to the conflicting properties of hydrophilicity and hydrophobicity, the polyethylene oxide forms irregularly arranged columnar bodies 12 having a diameter of 4 nm to 15 nm, and the polymethacrylate forms a transparent polymer layer 11 ).

Here, these columnar bodies 12 are nano-sized porous structures and are called nanocylinder structures. Also, the columnar body 12 formed of polyethylene oxide can be easily removed, and the columnar body 12 can be made hollow.

Next, each of the plurality of hollow columnar bodies 12 formed in the transparent polymer layer 11 is filled with the colored material 13. As the colored material 13, for example, a colored ink such as black ink, a colored resin, or the like is used. Thereafter, a second transparent sheet (not shown) is attached to the opposite side of the first transparent sheet of the transparent polymer layer 11 to constitute a display film (Fig. 2 (b)).

Next, the functions of the display film shown in Fig. 1 will be described with reference to Figs. 4 to 6. Fig. 4 is a plan view showing a display film according to Embodiment 1 of the present invention. 5 is a side view showing a display film according to Embodiment 1 of the present invention. 6 is an explanatory diagram showing a time control image of a display film according to Embodiment 1 of the present invention.

Although Figs. 4 to 6 show that the columnar bodies 12 are regularly formed, in practice, the columnar bodies 12 are irregularly arranged in the entire display film. That is, by the irregularly arranged columnar body 12a, the (N + 1) th columnar body 12b, and the other columnar body 12 arranged irregularly as shown in Figs. 4 and 5, It is possible to control the viewing angle as shown in Fig. 6 for any direction (360 degrees forward direction).

The viewing angle can also be adjusted by changing the height of the columnar body 12, the distance between the columnar bodies 12, or the transmittance of the colored material 13. In addition, the height of the columnar body 12 and the distance between the columnar bodies 12 can be changed by the configuration of the block copolymer. Hereinafter, the effect of the display film when various conditions are changed is shown.

Fig. 7 is an explanatory view showing effects of a display film according to Embodiment 1 of the present invention. Fig. 7 (a) shows a side view and a transmission angle shown in Fig. 5, and Fig. 7 (b) shows a simulation result under each condition.

7, for example, when the distance between the columnar bodies 12 and the height of the columnar bodies 12 is 1: 4, the transmittance of the columnar bodies 12 is 70%, and the transmission angle is 45 degrees , The transmittance of the display film is 38%, and the transmittance when combined with the S-IPS type LCD is 13%, so that the viewing angle is controlled.

As described above, by controlling the distance between the cylinders and the height of the cylinder by filling the interior of the cylinder of the nanocylinder structure with the colored material, it is possible to realize the viewing angle control with high accuracy in all directions.

As described above, according to Embodiment 1, the display film includes a transparent polymer layer formed from a transparent polymer material, a plurality of hollow pillar-shaped bodies irregularly arranged in the transparent polymer layer to control the viewing angle from the front direction, Each of which is filled with a colored material.

Therefore, the viewing angle can be controlled with respect to all directions of the display, and the viewing angle can be controlled with high accuracy.

&Lt; Embodiment 2 >

8 is a perspective view showing a viewing angle control panel of a display according to Embodiment 2 of the present invention. 9 is another perspective view showing a viewing angle control panel of a display according to Embodiment 2 of the present invention. Fig. 8 and Fig. 9 have the same configuration and therefore will be described by taking Fig. 8 as an example.

In Fig. 8, this viewing angle control panel is provided on the back surface or the surface of a display panel such as an LCD and an OLED (Organic Light Emitting Diode), and constitutes a display having a function of controlling a viewing angle. Here, it is assumed that a viewing angle control panel is provided between an LCD panel (not shown) and a backlight.

The viewing angle control panel includes a transparent polymer layer 11 formed from a transparent polymer material, a plurality of hollow columnar bodies 12 irregularly arranged in a transparent polymer layer 11 for controlling a viewing angle from a front direction, The electrochromic material 14 filled in each of the molded bodies 12 and the transparent electrodes 15a and 15b provided on both surfaces of the transparent polymer layer 11 are provided.

Although the columnar body 12 is shown as being regularly formed in Fig. 8, the columnar body 12 is irregularly arranged in the entire viewing angle control panel. The manufacturing process of the viewing angle control panel shown in Fig. 8 is similar to that of the first embodiment except that the electrochromic material 14 is filled instead of filling the colored material 13 in the columnar body 12, Except that the transparent electrodes 15a and 15b are used instead of the sheet.

In addition, the electrochromic material 14 changes its color depending on the applied voltage and the flowing current. Here, the electrochromic material 14 is transparent when no voltage is applied, and becomes black when a voltage is applied. Further, another material whose color changes depending on the voltage applied in place of the electrochromic material 14 and the flowing current may be used.

The transparent electrodes 15a and 15b are formed of ITO (Indium Tin Oxide) or the like and may be formed by a vapor deposition method on a display panel (TFT: Color Filters) or a film of ITO.

Next, the functions of the viewing angle control panel will be described with reference to Figs. 8 and 9. Fig. 8, when no voltage is applied between the transparent electrodes 15a and 15b and no current flows through the electrochromic material 14, the columnar body 12 becomes transparent so that the viewing angle is not limited, Can be obtained.

On the other hand, in FIG. 9, when a voltage is applied between the transparent electrodes 15a and 15b so that a current flows through the electrochromic material 14, the columnar body 12 becomes black to restrict the viewing angle, Can be narrowed down.

As described above, a wide viewing angle and a narrow viewing angle can be switched by charging an electrochromic material in a cylinder of a nanocylinder structure and applying a voltage between the transparent electrodes to flow an electric current to the electrochromic material.

As described above, according to Embodiment 2, the viewing angle control panel comprises a transparent polymer layer formed from a transparent polymer material, a plurality of hollow columnar bodies irregularly arranged in the transparent polymer layer for controlling the viewing angle from the front direction, Electrochromic materials filled in the transparent polymer layer, and transparent electrodes provided on both surfaces of the transparent polymer layer.

Therefore, the viewing angle can be controlled with respect to all directions of the display, and the viewing angle can be controlled with high accuracy.

In addition, by applying a voltage between the transparent electrodes and flowing current to the electrochromic material, the wide view angle mode and the narrow view angle mode can be selectively switched.

11: transparent polymer layer 12: columnar body
12a: N-columnar body 12b: N + 1 columnar body
13: colored material 14: electrochromic material
15a, 15b: transparent electrodes

Claims (6)

delete delete Forming a transparent polymer layer on the first transparent sheet by a block copolymer in which a hydrophilic polymer and a hydrophobic polymer are connected,
Partially removing the transparent polymer layer to form a plurality of irregularly arranged hollow pillar bodies,
Filling each of the plurality of hollow cylindrical bodies with a colored material,
And providing a second transparent sheet on the opposite side of the first transparent sheet of the transparent polymer layer,
The block copolymer is composed of a hydrophilic polyethylene oxide and a hydrophobic poly (methacrylate)
Wherein the plurality of hollow cylindrical bodies are formed by removing the hydrophilic polyethylene oxide,
Wherein a viewing angle from the front direction is limited.
delete Forming a viewing angle control panel,
The step of installing the viewing angle control panel on the back surface or the surface of the display panel,
The step of forming the viewing angle control panel includes:
Forming a transparent polymer layer on the first transparent electrode by a block copolymer in which a hydrophilic polymer and a hydrophobic polymer are connected,
Partially removing the transparent polymer layer to form a plurality of irregularly arranged hollow pillar bodies,
Filling each of the plurality of hollow cylindrical bodies with an electrochromic material;
Forming a second transparent electrode on a side of the transparent polymer layer opposite to the first transparent electrode,
The block copolymer is a hydrophilic poly (ethylene oxide) and a hydrophobic poly (methacrylate)
Wherein the plurality of hollow cylindrical bodies are formed by removing the hydrophilic polyethylene oxide,
Wherein a view angle from the front direction is limited by the viewing angle control panel.

delete
KR1020150120718A 2014-10-07 2015-08-27 Film for Display, Display, and Manufacturing Methods Thereof KR101768616B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014206308A JP2016075807A (en) 2014-10-07 2014-10-07 Display film, display and their production method
JPJP-P-2014-206308 2014-10-07

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KR20160042380A KR20160042380A (en) 2016-04-19
KR101768616B1 true KR101768616B1 (en) 2017-08-18

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US10712628B2 (en) 2016-07-29 2020-07-14 Hewlett-Packard Development Company, L.P. Display control in display devices
CN107694347B (en) * 2016-08-30 2020-11-13 北京大学 Micropore array filter membrane and preparation method and application thereof
WO2020110361A1 (en) * 2018-11-26 2020-06-04 株式会社東海理化電機製作所 Display board and display device
JP2020091459A (en) * 2018-11-26 2020-06-11 株式会社東海理化電機製作所 Display board and display device

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