KR102148086B1 - A surface illuminant and a transparent display device having the same - Google Patents

Abstract

The present invention relates to a surface light-emitting body and a transparent display device including the same. The transparent display device includes: a transparent LCD for displaying information; A transparent light guide plate disposed adjacent to the LCD; A film tightly coupled without air to the other side of the light guide plate opposite to the side on which the LCD is adjacently disposed; It is coupled to the side surface of the light guide plate so that the light source can spread to the light guide plate, and includes an LED bar in which micro LEDs are disposed at predetermined intervals. Through this, it is possible to clearly check the internal product through the screen while reducing the manufacturing cost of the light guide plate and simplifying the backlight module of the display, which is thinner and reduces image loss on the screen.

Description

A surface illuminant and a transparent display device having the same

The present invention relates to a surface light-emitting body and a transparent display device having the same, and more particularly, by closely bonding a predetermined film to the opposite surface of the screen of the light guide plate without air, thereby maintaining the transparency of the screen and inducing the refraction of light on the screen, The present invention relates to a surface light-emitting body that does not decrease screen brightness even when a pattern processed on a light guide plate is removed, and induces a display to clearly see an object opposite the screen, and a transparent display device having the same.

The content described below merely provides background information related to the present invention and does not constitute the prior art.

The transparent display device is a device that is driven so that all situations in front and behind the display can be viewed as it is while viewing display information or screen. The display device may be used as a showcase of a street or store, a front door of a home appliance, a window, a desk, and the like.

A transparent display device can display information or a screen even when there is light on the back side or in the daytime, even if the display does not emit light, and for this, it must be transparent. Separately, it is important to display only the display screen or information when there is no light at the rear or at night.

BACKGROUND ART A backlight device used in a conventional transparent display device is a light emitting diode (hereinafter referred to as'LED') as a light source to realize an image of a display device such as a liquid crystal display device.

In a conventional transparent display device, a light guide plate, that is, a surface of a plastic highly transparent object such as acrylic, is made finely uneven by using an LED or a lighting device to refract light traveling straight from the side, thereby increasing the brightness of the uneven portion.

In the case of products with a short distance, the whole was brightened by using one side light source, and in the case of a larger one, light emission was induced from both sides or the entire floor. In addition, when moving away from the light source, it is common to increase the number of irregularities to increase the reflected light.

The transparent display device is characterized by allowing an object opposite the screen to be viewed together with the display screen.

In order for the transparent display screen to be visible, if sufficient transmission of the backlight light source from the rear is not performed, the screen becomes dark, and conversely, the image transmitted to the screen is not visible at all.

In the past, the lighting equipment of the transparent display device uses an existing backlight unit, but additional light sources are provided at the rear or on the left and right to illuminate the entire space at a certain distance without being directly attached to the display panel.

Domestic patent registration 10-1584396 (2016.01.05)

The present invention is to solve the above-described problems, and since the light guide plate itself is insufficient to change the straightness of light, the transparency of the screen is improved by attaching a predetermined film to the opposite side of the screen of the light guide plate so that the light travels straight and induces scattering. It is to provide a surface light-emitting body that induces refraction of light on a screen while maintaining and a transparent display device having the same.

In addition, the present invention is to solve the above-described problem, the screen brightness does not decrease even when the pattern processed on the light guide plate is removed, and a surface light-emitting body that allows the display to clearly see an object opposite the screen to be guided, and the same are provided. It is to provide a transparent display device.

However, the problems to be solved by the present invention are not limited to those mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

Surface light-emitting body according to the features of the present invention for solving these technical problems,

As a surface light-emitting body disposed adjacent to a transparent LCD,

A transparent light guide plate disposed adjacent to the LCD;

A film tightly coupled without air to the other side of the light guide plate opposite to the side on which the LCD is adjacently disposed;

It is coupled to the side surface of the light guide plate so that the light source can spread to the light guide plate, and includes an LED bar in which micro LEDs are disposed at predetermined intervals.

Surface light-emitting body according to another feature of the present invention for solving these technical problems,

As a surface light-emitting body disposed adjacent to a transparent LCD, micro LEDs are disposed at predetermined intervals, and combined with an LED bar that outputs a light source,

A transparent light guide plate disposed adjacent to the LCD and diffusing the light source of the LED bar;

The light guide plate includes a film tightly coupled without air on the other side opposite to the side on which the LCD is disposed adjacent to each other.

The LED may be arranged such that the light source faces the central surface from the side surface of the light guide plate.

A transparent adhesive sheet may be disposed between the film and the light guide plate so that the light guide plate and the film are in close contact without air.

The light guide plate is transparent glass or acrylic.

A transparent display device according to a feature of the present invention for solving this technical problem,

A transparent LCD for displaying information;

A transparent light guide plate disposed adjacent to the LCD;

A film tightly coupled without air to the other side of the light guide plate opposite to the side on which the LCD is adjacently disposed;

It is coupled to the side surface of the light guide plate so that the light source can spread to the light guide plate, and includes an LED bar in which micro LEDs are disposed at predetermined intervals.

According to the present invention, since the light guide plate itself is insufficient to change the straightness of light, a predetermined film is intimately coupled to the opposite surface of the screen without air so that light can travel straight and induce scattering while maintaining the transparency of the screen. A surface light-emitting body that induces refraction of light and a transparent display device having the same may be provided.

In addition, the present invention does not decrease the screen brightness even when the pattern processed on the light guide plate is removed, and a surface light emitting body capable of clearly viewing an object opposite the screen to be induced by the display, and a transparent display device having the same can be provided. .

In addition, the present invention simplifies the surface light-emitting body module of the display while reducing the manufacturing cost of the light guide plate, so that the internal product can be clearly identified through the screen while being thinner and reducing the loss of image on the screen.

1 is a diagram showing an example of a conventional display device.
2 is a diagram showing an example of a conventional lamp light box.
3 is a diagram illustrating a transparent display device according to a first exemplary embodiment of the present invention.
4 is a plan view of a transparent display device according to a first exemplary embodiment of the present invention.
5 is a side cross-sectional view of a transparent display device according to a first exemplary embodiment of the present invention.
6 is a diagram illustrating a traveling direction of light in the transparent display device according to the first exemplary embodiment of the present invention.
7 is a plan view of a transparent display device according to a second exemplary embodiment of the present invention.
8 is a side cross-sectional view of a transparent display device according to a second exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms used in the present specification are terms used to properly express a preferred embodiment of the present invention, which may vary depending on the intention of users or operators, or customs in the field to which the present invention belongs. Accordingly, definitions of these terms should be made based on the contents throughout the present specification. The same reference numerals in each drawing indicate the same members.

Throughout the specification, when a member is said to be positioned "on" another member, this includes not only the case where a member is in contact with another member, but also the case where another member exists between the two members.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components.

Hereinafter, the surface light emitting body of the present invention, a transparent display device including the same, and a method of manufacturing the same will be described in detail with reference to embodiments and drawings. However, the present invention is not limited to these examples and drawings.

3 is a view showing a transparent display device according to a first embodiment of the present invention, FIG. 4 is a plan view of the transparent display device according to the first embodiment of the present invention, and FIG. 5 is the present invention FIG. 6 is a side cross-sectional view of a transparent display device according to a first embodiment of the present invention, and FIG. 6 is a view showing a light traveling direction in the transparent display device according to the first embodiment of the present invention.

3 to 6, the transparent display device according to the first embodiment of the present invention,

A transparent LCD 100 for displaying information;

A transparent light guide plate 200 disposed adjacent to the LCD 100;

A film 300 tightly coupled without air to the other side of the light guide plate 200, which is opposite to the side on which the LCD 100 is disposed adjacently;

It is coupled to the side surface of the light guide plate 200 so that the light source can spread to the light guide plate 200 and includes an LED bar 400 in which micro LEDs are disposed at predetermined intervals.

If necessary, the LED bar 400 can be manufactured separately, and can be combined later.

Here, the surface light-emitting body,

A transparent light guide plate 200 disposed adjacent to the LCD 100;

A film 300 tightly coupled without air to the other side of the light guide plate 200, which is opposite to the side on which the LCD 100 is disposed adjacently;

It is coupled to the side surface of the light guide plate 200 so that the light source can spread to the light guide plate 200, and includes an LED bar 400 in which micro LEDs 410 are disposed at predetermined intervals.

In the present invention, when the film 300 tightly coupled to the light guide plate 200 without air contains air, surface light emission may not be achieved or light emission power may be significantly reduced.

The LED 410 may be disposed such that the light source faces the central surface from the side surface of the light guide plate 200.

A transparent adhesive sheet is disposed between the film 300 and the light guide plate 200 so that the light guide plate 200 and the film 300 are in close contact without air.

The light guide plate 200 is made of transparent glass or acrylic.

The light guide plate 200 of the surface light-emitting body, which is a backlight unit, flexibly changes the straightness of light to concentrate light in the direction of the screen.

The light guide plate 200 itself may be insufficient to change the straightness of the light, but in the first embodiment of the present invention, a predetermined film 300 is provided on the opposite surface of the screen of the light guide plate 200 so that the light travels straight and induces scattering. By attaching it, it maintains the transparency of the screen and induces the refraction of light on the screen.

Preferably, the film 300 may be a film made of polysilsesquioxane resin. Specifically, the polysilsesquioxane resin may have a ladder shape and may be represented by Formula 1 below.

[Formula 1]

In Formula 1

R1, R2 and R3 are each independently selected from the group consisting of hydrogen, an alkyl group, an aryl group, an amine group, a halogen, an alkylhalogen, a vinyl group, a methacryl group, an acrylic group, and an epoxy group, and at least one of R1, R2 and R3 The above is a crosslinkable organic functional group selected from the group consisting of a vinyl group, a methacrylic group, an acrylic group, and an epoxy group, and n is an integer of 1 to 1,000.

In this case, the transparency can be further improved, and it is particularly advantageous in tightly bonding the film without air.

And, if necessary, zinc oxide powder may be added to the film 300. The zinc oxide powder may have a length of 250 to 500 nm, and a rod-shaped zinc oxide powder having an Aspcet ratio of 4 to 7 may be used.

This zinc oxide powder,

a)i) zinc compounds;

Ii) water in an amount capable of sufficiently dissolving the zinc compound; And

Iii) preparing a reactant by mixing alcohol in a ratio of 10 to 100 parts by weight based on 100 parts by weight of water;

b) adding an aqueous alkali solution having a concentration of 10 to 20% by weight to the reaction product of step a) in the form of droplets having a diameter of at most 100 μm and neutralizing to form zinc hydroxide;

c) oxidizing the zinc hydroxide formed in step b); And

d) It can be prepared by dehydrating, drying, and pulverizing the oxide of step c).

When zinc oxide powder is included in the film 300, the content of the zinc oxide powder may be included in an amount of 0.1 to 10% by weight, and in this case, glare may be prevented.

In addition, in the first embodiment of the present invention, even if the pattern processed on the light guide plate 200 is removed, the screen brightness does not decrease, and an object opposite the screen to be induced by the display can be clearly seen.

Referring to FIG. 6, in the first embodiment of the present invention, a predetermined film 300 is closely coupled to one side of the transparent light guide plate 200 without air, and the light source is formed of the light guide plate 200 from the side of the light guide plate 200. The LEDs 410 are arranged so as to face the center surface.

Therefore, while maintaining the transparency of the LCD 100 screen, the refraction of the light is induced, and the screen brightness does not decrease even when the pattern processed on the light guide plate 200 is removed, and the opposite side of the screen to be induced by the display You can clearly see the object of.

A transparent adhesive is disposed on one side of the film 300 so as to be in close contact with the light guide plate 200.

The light guide plate 200 may be made of highly transparent glass or acrylic.

After the film 300 is attached to one side of the transparent light guide plate 200, the LCD 100 is disposed on the opposite side.

In the above process, a predetermined film 300 is attached to one side of the transparent light guide plate 200, and the LED 410 is disposed so that the light source faces the center surface of the light guide plate 200 from the side of the light guide plate 200, The LED 410 may be disposed in either the left or right upper and lower sides as needed.

The first embodiment of the present invention can be modified in various ways, and the modified example will be described as follows.

7 is a plan view of a transparent display device according to a second exemplary embodiment of the present invention, and FIG. 8 is a side cross-sectional view illustrating a transparent display device according to a second exemplary embodiment of the present invention.

7 or 8, the transparent display device according to the second exemplary embodiment of the present invention,

A transparent LCD 100 for displaying information;

A transparent light guide plate 200 disposed adjacent to the LCD 100;

A film 300 bonded to the other side of the light guide plate 200 that is opposite to the side on which the LCD 100 is disposed adjacent to each other;

An adhesive sheet 500 for intimately bonding the light guide plate 200 and the film 300 without air;

It is coupled to the side surface of the light guide plate 200 so that the light source can spread to the light guide plate 200, and includes an LED bar 400 in which micro LEDs 410 are disposed at predetermined intervals.

In the transparent display device according to the second embodiment of the present invention, an adhesive sheet 500 is added in the first embodiment, and the light guide plate 200 and the LCD 100 are attached by placing an adhesive member between two members. State.

Through this, it is possible to clearly check the internal product through the screen while reducing the loss of the image on the screen.

As described above, although the embodiments have been described by the limited embodiments and drawings, various modifications and variations are possible from the above description by those of ordinary skill in the art. For example, even if the described techniques are performed in a different order from the described method, and/or the described components are combined or combined in a form different from the described method, or are replaced or substituted by other components or equivalents. Appropriate results can be achieved. Therefore, other implementations, other embodiments, and claims and equivalents fall within the scope of the claims to be described later.

Claims (7)

As a surface light-emitting body disposed adjacent to a transparent LCD,
A transparent light guide plate disposed adjacent to the LCD;
A film tightly coupled without air to the other side of the light guide plate opposite to the side on which the LCD is adjacently disposed;
It is coupled to the side surface of the light guide plate so that a light source can spread to the light guide plate, and includes an LED bar in which micro LEDs are disposed at predetermined intervals,

The film is characterized in that it is a film made of a silsesquioxane resin represented by the following formula (1),
[Formula 1]

In Formula 1
R1, R2 and R3 are each independently selected from the group consisting of hydrogen, an alkyl group, an aryl group, an amine group, a halogen, an alkylhalogen, a vinyl group, a methacrylic group, an acrylic group and an epoxy group, and at least one of R1, R2 and R3 The above is a crosslinkable organic functional group selected from the group consisting of a vinyl group, a methacrylic group, an acrylic group, and an epoxy group, and n is an integer of 1 to 1,000.

The film further comprises a rod-shaped zinc oxide powder,
The zinc oxide powder has a length of 250 to 500 nm, and a rod-shaped zinc oxide powder having an Aspcet ratio of 4 to 7 may be used,
The zinc oxide powder,
a)i) zinc compounds;
Ii) water in an amount capable of sufficiently dissolving the zinc compound; And
Iii) preparing a reactant by mixing alcohol in a ratio of 10 to 100 parts by weight based on 100 parts by weight of water;
b) adding an aqueous alkali solution having a concentration of 10 to 20% by weight to the reaction product of step a) in the form of droplets having a diameter of at most 100 μm and neutralizing to form zinc hydroxide;
c) oxidizing the zinc hydroxide formed in step b); And
d) prepared by dehydrating, drying, and pulverizing the oxide of step c),

When zinc oxide powder is included in the film 300, the content of the zinc oxide powder is included in an amount of 0.1 to 10% by weight,
The LED is disposed so that the light source faces the center surface from the side of the light guide plate,
The film and the light guide plate are characterized in that a transparent adhesive sheet is disposed to closely bond the light guide plate and the film without air.
Surface light-emitting body.
As a surface light-emitting body disposed adjacent to a transparent LCD, micro LEDs are disposed at predetermined intervals, and combined with an LED bar that outputs a light source,
A transparent light guide plate disposed adjacent to the LCD and diffusing the light source of the LED bar;
Including a film in close contact without air on the other side of the light guide plate opposite to the side on which the LCD is disposed adjacent,
The film is characterized in that it is a film made of a silsesquioxane resin represented by the following formula (1),
[Formula 1]

In Formula 1
R1, R2 and R3 are each independently selected from the group consisting of hydrogen, an alkyl group, an aryl group, an amine group, a halogen, an alkylhalogen, a vinyl group, a methacrylic group, an acrylic group and an epoxy group, and at least one of R1, R2 and R3 The above is a crosslinkable organic functional group selected from the group consisting of a vinyl group, a methacrylic group, an acrylic group, and an epoxy group, and n is an integer of 1 to 1,000.

The film further comprises a rod-shaped zinc oxide powder,
The zinc oxide powder has a length of 250 to 500 nm, and a rod-shaped zinc oxide powder having an Aspcet ratio of 4 to 7 may be used,
The zinc oxide powder,
a)i) zinc compounds;
Ii) water in an amount capable of sufficiently dissolving the zinc compound; And
Iii) preparing a reactant by mixing alcohol in a ratio of 10 to 100 parts by weight based on 100 parts by weight of water;
b) adding an aqueous alkali solution having a concentration of 10 to 20% by weight to the reaction product of step a) in the form of droplets having a diameter of at most 100 μm and neutralizing to form zinc hydroxide;
c) oxidizing the zinc hydroxide formed in step b); And
d) prepared by dehydrating, drying, and pulverizing the oxide of step c),

When zinc oxide powder is included in the film 300, the content of the zinc oxide powder is included in an amount of 0.1 to 10% by weight,
The LED is disposed so that the light source faces the center surface from the side of the light guide plate,
A surface light-emitting body, characterized in that a transparent adhesive sheet is disposed between the film and the light guide plate so that the light guide plate and the film are in close contact with each other without air.
delete delete delete A transparent LCD for displaying information;
A transparent light guide plate disposed adjacent to the LCD;
A film tightly coupled without air to the other side of the light guide plate opposite to the side on which the LCD is adjacently disposed;
It is coupled to the side surface of the light guide plate so that a light source can spread to the light guide plate, and includes an LED bar in which micro LEDs are disposed at predetermined intervals,
The LED is arranged so that the light source faces the central surface from the side of the light guide plate, and a transparent adhesive sheet is disposed between the film and the light guide plate to closely couple the light guide plate and the film without air,

The film is characterized in that it is a film made of a silsesquioxane resin represented by the following formula (1),
[Formula 1]

In Formula 1
R1, R2 and R3 are each independently selected from the group consisting of hydrogen, an alkyl group, an aryl group, an amine group, a halogen, an alkylhalogen, a vinyl group, a methacrylic group, an acrylic group and an epoxy group, and at least one of R1, R2 and R3 The above is a crosslinkable organic functional group selected from the group consisting of a vinyl group, a methacrylic group, an acrylic group, and an epoxy group, and n is an integer of 1 to 1,000.

The film further comprises a rod-shaped zinc oxide powder,
The zinc oxide powder has a length of 250 to 500 nm, and a rod-shaped zinc oxide powder having an Aspcet ratio of 4 to 7 may be used,
The zinc oxide powder,
a)i) zinc compounds;
Ii) water in an amount capable of sufficiently dissolving the zinc compound; And
Iii) preparing a reactant by mixing alcohol in a ratio of 10 to 100 parts by weight based on 100 parts by weight of water;
b) adding an aqueous alkali solution having a concentration of 10 to 20% by weight to the reaction product of step a) in the form of droplets having a diameter of at most 100 μm and neutralizing to form zinc hydroxide;
c) oxidizing the zinc hydroxide formed in step b); And
d) prepared by dehydrating, drying, and pulverizing the oxide of step c),

When zinc oxide powder is included in the film 300, the content of the zinc oxide powder is 0.1 to 10% by weight. delete

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