WO2022220315A1

WO2022220315A1 - Display apparatus for high luminance with increased cooling efficiency

Info

Publication number: WO2022220315A1
Application number: PCT/KR2021/004655
Authority: WO
Inventors: 반신애
Original assignee: 주식회사 엠알케이
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2022-10-20

Abstract

The present invention is a display apparatus for high luminance with increased cooling efficiency, and comprises: a display panel on which information is displayed; a backlight substrate that illuminates the display panel; a heat sink plate for dissipating heat of the backlight substrate to the outside; and a first case supporting the display panel and the backlight substrate. In an embodiment of the present invention, a backlight structure is manufactured in an integrated structure with a heat sink so that heat generated by the backlight is immediately transferred to the outside and cooled, and a display case is composed of metal so that a path through which internal heat is directly transferred to the outside may be minimized.

Description

High-brightness display device with improved cooling efficiency

The present invention relates to a high-brightness signage display device with improved cooling efficiency, and more particularly, to have an integrated structure in which a heat sink including a backlight is exposed to the outside in order to effectively transfer heat generated inside the display front and the display case. And it relates to a high-brightness display device with improved cooling efficiency, which minimizes damage to the panel due to internal heat and prevents aging of the screen for a long period of time by allowing the heat generated inside to be transferred directly to the heat sink.

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

Recently, digital signage that provides various contents and messages through a display panel rather than a hardware medium, such as a signboard or poster for outdoor advertising, has been used. Recently, the demand for digital signage is increasing due to the rapid development of intelligent digital imaging devices based on LCD or LED.

On the other hand, a display device for high luminance should be able to show the screen brighter by using a brighter backlight device. As the brightness of the screen increases, the heat generated by the backlight device increases, causing the screen to turn yellow or burn black. As a result, many sunspots are generated on the screen.

In addition, in order to prevent the inflow of heat generated from the outside, heat can be reflected using surface treatment, but in order to effectively remove internal heat, external foreign substances according to the electric device, cooling fan, and gas inflow and outflow structure are removed. It requires additional installation, such as installing a filter for

As described above, the conventional method has a problem in that it is difficult for the heat accumulated inside the device to be discharged to the outside, and in order to solve this problem, a complicated structure must be prepared in the prior art, thereby increasing the cost.

[Prior art literature]

[Patent Literature]

Korean Patent Publication No. 2014-0126912 (2014.11.03)

The present invention is to solve the above-mentioned problems, and by fabricating the backlight structure as an integrated structure with the heat sink, heat generated from the backlight is immediately transferred to the outside to cool the heat, and the display case is made of metal to reduce internal heat. An object of the present invention is to provide a high-brightness display device that minimizes a path directly transmitted to the outside and has improved cooling efficiency.

In addition, the present invention is to solve the above problems, a direct-type structure is applied, a backlight module is manufactured on a metal plate, and an integrated structure in which a heat sink is combined with a backlight module is applied, a high-brightness display device with increased cooling efficiency is to provide

In addition, the present invention is intended to solve the above-described problems, and is sealed so as to have a waterproof structure without inflow of foreign substances such as external water or dust, and a driver and a driving board for driving the screen have the same sealing structure. , to provide a high-brightness display device with improved cooling efficiency.

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

A high-brightness display device with increased cooling efficiency according to a feature of the present invention for solving these technical problems,

A display device for high brightness with improved cooling efficiency, comprising:

a display panel for displaying information;

a backlight substrate illuminating the display panel with light;

a heat sink for dissipating heat of the backlight substrate to the outside;

and a first case in which the display panel and the backlight substrate are supported.

a second case formed below the first case;

It further includes a back cover surrounding the first case and the second case and protecting the heat sink from the outside.

The LED of the backlight substrate may be coated with resin.

A wiring hose is inserted into the first case and finished with a hole finishing material, and the wiring is connected to the backlight substrate through the wiring hose.

The wiring is externally connected through the second case, and the second case is also treated with a finishing material.

The heat generated from the display panel and the backlight substrate is directly radiated to the outside through the first case and at the same time is radiated to the inner space between the back cover and the heat sink through the heat sink.

When heat is emitted to the inner space of the second case and the temperature rises, the air introduced through the second opening is discharged through the first opening due to a convection phenomenon.

In an embodiment of the present invention, by manufacturing the backlight structure as an integrated structure with the heat sink, heat generated from the backlight is immediately transferred to the outside to cool the heat, and the display case is made of metal so that the internal heat is directly transferred to the outside. It is possible to provide a high-brightness display device that minimizes a path and has improved cooling efficiency.

In addition, in an embodiment of the present invention, a direct-type structure is applied, a backlight module is manufactured on a metal plate, and an integrated structure in which a heat sink is combined with a backlight module is applied. .

In addition, in an embodiment of the present invention, it is sealed to have a waterproof structure without inflow of foreign substances such as external water or dust, and a driver and a driving board for driving the screen have the same sealing structure, which improves cooling efficiency. It is possible to provide a display device for high luminance.

1 is a view showing a cross-sectional side view of a display device for high brightness with increased cooling efficiency according to another embodiment of the present invention.

2 is a view showing a heat dissipation state of a high-brightness display device with improved cooling efficiency according to another embodiment of the present invention.

3 is a view showing a heat dissipation structure in a state in which a back cover is mounted on a display device for high brightness with improved cooling efficiency according to an embodiment of the present invention.

4 is a view showing an example in which a resin is applied to the LED in the display device for high brightness with increased cooling efficiency according to an embodiment of the present invention.

5 is a view showing another state of the display device for high brightness with increased cooling efficiency according to an embodiment of the present invention.

Hereinafter, 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 well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms used in this specification are terms used to properly express a preferred embodiment of the present invention, which may vary according to the intention of a user or operator, or a custom in the field to which the present invention belongs. Accordingly, definitions of these terms should be made based on the content throughout this specification. Like reference numerals in each figure indicate like elements.

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

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

Hereinafter, a display device for high luminance with improved cooling efficiency of the present invention will be described in detail with reference to Examples and drawings. However, the present invention is not limited to these examples and drawings.

1 to 4 , a high-brightness display device with increased cooling efficiency according to an embodiment of the present invention,

a display panel 110 for displaying information;

a backlight substrate 130 illuminating the display panel 110 with light;

a heat sink 140 for dissipating heat of the backlight substrate to the outside;

and a first case 150 on which the display panel 110 and the backlight substrate 130 are supported.

a second case formed on a lower portion of the first case 150;

A first opening 160 and a second opening 161 are formed between the first case 150 and the back cover, and when heat is emitted to the inner space of the second case and the temperature rises, the first opening 160 and the second opening 161 are formed by a convection phenomenon. Air entering through the second opening exits the first opening.

In the structure between the display panel 110 and the backlight substrate 130 , a resin may be covered on the LEDs of the backlight substrate 130 , thereby making it waterproof.

Referring to FIG. 4 , a resin may be added to the upper surface of the LED plate fixed to the backlight substrate 130 , and if the resin is added, not only a waterproof function but also a light diffusion effect may be increased.

A wiring hose is inserted into the first case 150 and finished with a hole finishing material, and the wiring is connected to the backlight substrate through the wiring hose.

If necessary, the inside of the hose for wiring can be applied based on a height of 5mm and a width of 40mm, and it can be changed as needed.

As such, the first case 150 having the heat sink 140 to which the LED is fixed is also waterproofed, so that even if some moisture is introduced, there is no problem in operation.

By doing so, it is possible to satisfy the waterproof rating and effectively transfer internal heat to the outside.

The heat generated by the display panel 110 and the backlight substrate 130 is directly radiated to the outside through the first case 150 and simultaneously radiated to the internal space between the display panel 110 and the back cover through the heat sink 140 . characterized by being

When heat is emitted to the inner space of the first case and the back cover and the temperature rises, the air introduced through the second opening 161 escapes through the first opening 160 due to a convection phenomenon.

Referring to FIG. 1 , the cover glass 120 for protecting the screen is positioned at the front, and the backlight 130 for adjusting the brightness of the screen is disposed to be spaced apart from the display panel 110 by a predetermined distance. The backlight 130 has a structure integral with the heat sink 140 for dissipating heat, respectively, and the heat sink 140 has a structure exposed to the outside.

The inside between the backlight 130 and the display panel 110 is completely independent from the outside, so that no outside air is introduced.

Referring to FIG. 2 , in order to effectively radiate heat of the backlight substrate 130 to the outside, a method in which the internal temperature is exposed to the outside is applied. Therefore, the backlight substrate 130 is applied in an integrated structure with the heat sink 140 . In addition, the first case 150 and the second case 151 are applied with a metal material that conducts heat well to the outside and can be easily cooled.

Accordingly, the heat generated by the backlight substrate 130 is immediately discharged to the outside through the heat sink 140 , and also the internal heat between the display panel 110 and the backlight substrate 130 may transfer heat to the first case. (150) through the metal frame directly exits to the outside.

Referring to FIG. 3 , a driver or a driving board for driving the screen passes through a hose connected inside the case and connects to the second case, and the inside of the connection hose has a diameter of about 10 mm to 40 mm.

The inlet and outlet of the hose for wiring use a hole finishing material to prevent moisture from entering.

Even if an external K is added, the heat sink is directly exposed and the back cover has a gas passage structure to effectively cool the internal heat.

The operation of the display device for high luminance with the increased cooling efficiency according to the embodiment of the present invention having such a configuration is as follows.

First, when power is supplied, information is transmitted to the second display panel 110 from an external driving board (not shown), and predetermined information or advertisement content is displayed on the display panel by driving the backlight substrate 130 . do.

Then, heat is generated according to the lapse of time during which the backlight substrate 130 and the display panel 110 are driven.

Then, the heat of the backlight substrate 130 is emitted to the inner space of the heat sink 140 and the back cover, and the temperature of the inner space increases.

Then, the heat of the inner space rises to the top by convection and is rapidly discharged to the outside. That is, the heat generated by the backlight substrate 130 is immediately discharged to the outside through the inner space between the heat sink 140 and the back cover, and the air introduced through the second opening 161 is directed to the second opening 160 . The faster it exits, the smoother the cooling.

In addition, internal heat between the display panel 110 and the backlight substrate 130 is also directly discharged to the outside through the metal frame of the first case 150 capable of transferring heat.

5, the backlight substrate 136,

Including a plurality of LEDs 135, the adjacent LEDs are alternately hemispherical reflective sheets or light guides 137 are installed,

The heat sink 145 radiates heat generated by the reflective sheet and the LED to the outside.

In addition, the display apparatus 100 with improved cooling efficiency according to an embodiment of the present invention may change the structure of the heat sink 145 for discharging internal heat as necessary. In particular, it is possible to add a separate light guide 137 for use as a supporter that can prevent the sagging of the backlight module 136 having the reflective sheet.

Specifically, a light guide 137 for guiding light on the LED 135 of the backlight substrate 136 having a reflective sheet is installed intermittently or alternately on some of the entire LEDs, and the LED 135 is mounted on the backlight. A heat sink 145 (heat sink) is formed under the substrate 136 , and the heat sink 145 (heat sink) may extend to a middle portion of the light guide.

Accordingly, heat generated from the backlight module 136 may be efficiently radiated to the outside through the heat sink 145 .

If necessary, an IR (infrared) surface treatment may be selectively applied to the inner surface of the cover glass 120, which is the upper lamination part of the polarizing film, to improve visibility.

In the above embodiment of the present invention, by manufacturing the backlight structure as an integrated structure with the heat sink, heat generated from the backlight is immediately transferred to the outside to cool the heat, and the display case is made of metal so that the internal heat is directly transferred to the outside path can be minimized.

In addition, in an embodiment of the present invention, a direct-type structure is applied, the backlight module is manufactured on a metal plate, and an integrated structure in which a heat sink is combined with the backlight module can be applied.

In addition, in an embodiment of the present invention, it is sealed to have a waterproof structure without inflow of foreign substances such as external water or dust, and a driver and a driving board for driving the screen may also have the same sealing structure.

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

Claims

A display device for high brightness with improved cooling efficiency, comprising:

a display panel for displaying information;

a backlight substrate illuminating the display panel with light;

a heat sink for dissipating heat of the backlight substrate to the outside;

A high-brightness display device including a first case in which the display panel and the backlight substrate are supported, and having improved cooling efficiency.
According to claim 1,

a second case formed below the first case;

A high-brightness display device for increasing cooling efficiency further comprising a back cover enclosing the first case and the second case and protecting the heat sink from the outside.
3. The method of claim 2,

A high-brightness display device with increased cooling efficiency by coating a resin on the upper surface of the LED plate fixed to the backlight substrate.
4. The method of claim 3,

A wiring hose is inserted into the first case and finished with a hole finishing material, and a high-brightness display device with increased cooling efficiency in which the wiring is connected to the backlight substrate through the wiring hose.
5. The method of claim 4,

The wiring is connected from the outside through the second case, and the second case is also treated with a finishing material.
6. The method of claim 5,

The heat generated from the display panel and the backlight substrate is directly radiated to the outside through the first case and at the same time is radiated to the inner space between the back cover and the heat sink through the heat sink. .
7. The method of claim 6,

The high-brightness display device with improved cooling efficiency, characterized in that when heat is emitted to the inner space of the second case and the temperature rises, the air introduced through the second opening is discharged through the first opening due to a convection phenomenon.
A display device for high luminance with improved cooling efficiency, comprising:

a display panel for displaying information;

a backlight substrate illuminating the display panel with light;

a heat sink for dissipating heat of the backlight substrate to the outside;

a first case in which the display panel and the backlight substrate are supported;

The backlight substrate,

Including a plurality of LEDs, adjacent LEDs are alternately installed with a hemispherical reflective sheet or light guide,

The heat sink is a high-brightness display device with increased cooling efficiency for emitting heat generated from the reflective sheet and the LED to the outside.