KR20210082934A - Display Device - Google Patents

Abstract

The present invention provides a display device, which includes: a display panel; a guide holder disposed on a rear surface of the display panel; a printed circuit board connected to the display panel and disposed on a rear surface of the guide holder; and a coupling means interposed between the guide holder and the printed circuit board so that thickness is elastically variable. Accordingly, it is possible to reduce the transmission of vibrations from the outside.

Description

Display Device

The present invention relates to a display device, and to a display device capable of preventing a printed circuit board disposed on a rear surface of a display panel from being damaged by vibration or from being damaged by static electricity or electromagnetic waves.

The video display, which implements various information on the screen, is a key technology in the information and communication era, and is developing in the direction of thinner, lighter, and higher performance. Accordingly, a flat panel display capable of reducing the weight and volume, which is a disadvantage of cathode ray tubes (CRT), and a liquid crystal display that realizes an image by receiving light from a light source, and an organic light emitting display that can omit the light source unit because it is capable of self-luminescence. Be in the spotlight.

In such a display, a plurality of pixels are arranged in a matrix to display an image. Here, each pixel includes a pixel driving circuit composed of a light emitting element and a plurality of transistors independently driving the light emitting element.

Recently, research on a thin and light display panel has been actively conducted, and a display device in which the display panel can be curved or folded or unfolded is also supplied.

However, while making the display device small and thin, it is difficult to discharge static electricity or electromagnetic waves generated from the display panel or circuit board, and the problem of being vulnerable to vibration is pointed out.

The present invention is to solve such a problem, and more specifically, by providing a coupling means on the guide holder to which the printed circuit board is attached, it is possible to block the transmission of vibrations, and also the ground terminal of the printed circuit board is coupled to the coupling means An object of the present invention is to provide a display device capable of configuring a ground path while in contact with the .

In order to solve the above problems, the present invention provides a display panel, a guide holder disposed on the rear surface of the display panel, a printed circuit board connected to the display panel and disposed on the rear surface of the guide holder, and a guide holder so that the thickness is elastically variable; It provides a display device including a coupling means interposed between the printed circuit board.

The coupling means may include a first film attached to the rear surface of the guide holder, a second film attached to the rear surface of the printed circuit board, and a leaf spring elastically spaced apart while connecting the first film and the second film.

The leaf spring may be made of a metal material and have an “S” shape in one cross section.

A plurality of leaf springs may be arranged side by side.

The leaf spring may include a plurality of first steel wires disposed side by side in one direction and a plurality of second steel wires disposed side by side in a different direction from the first steel wire.

In the leaf spring, the first steel wire and the second steel wire may be arranged in a grid pattern.

The printed circuit board may be provided with at least one or a plurality of ground terminals. In addition, in the coupling means, an opening through which the leaf spring is exposed is formed in at least a portion or a plurality of regions of the second film to correspond to the position of the ground terminal, and the ground terminal may be electrically connected to the leaf spring through the opening.

The coupling means may be formed to have a size that is at least equal to or smaller than that of the attachment area of the printed circuit board.

The display device may further include a cover glass disposed on the front surface of the display panel.

According to the display device of the present invention,

First, by providing a coupling means between the guide holder and the printed circuit board, it is possible to reduce the transmission of vibration from the outside by elastically varying the thickness of the leaf spring,

Second, it is possible to prevent noise caused by the gap by deleting the gap between the printed circuit board and the guide holder,

Third, the leaf spring of the coupling means is connected to the ground terminal of the printed circuit board, and there is an effect of preventing the printed circuit board or the display panel from being damaged as static electricity is discharged.

1 is a rear perspective view illustrating a rear surface of a display device according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view illustrating the display device shown in FIG. 1 by cutting a region AA′.
Figure 3 is a reference view showing a state in which the thickness of the coupling means shown in Figure 2 is variable.
4 is a perspective view showing a leaf spring pattern of the coupling means shown in FIG. 3 .
FIG. 5 is a partially enlarged view illustrating a partially enlarged coupling means of the display device shown in FIG. 2 .
6 and 7 are reference views showing another embodiment of the coupling means of the present invention.

Hereinafter, preferred embodiments of the present invention will be described so that those of ordinary skill in the art can easily implement them with reference to the accompanying drawings. In the accompanying drawings, it should be noted that the same reference numbers are used as much as possible when indicating the same configuration in other drawings. In addition, in the description of the present invention, if it is determined that a detailed description of a related known function or a known configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, certain features presented in the drawings are enlarged, reduced, or simplified for ease of description, and the drawings and components thereof are not necessarily drawn to scale. However, those skilled in the art will readily appreciate these details.

In the present application, "display device" may include a display device in a narrow sense, such as a liquid crystal module (LCM) including a display panel and a driving unit for driving the display panel, and an organic light emitting display module (OLED Module). . And, the LCM, a finished product (complete product or final product) including an OLED module, a notebook computer, a television, a computer monitor, an automotive device (automotive display) or other types of vehicles (vehicle) including equipment (equipment) Display), a set electronic device such as a mobile electronic device such as a smart phone or an electronic pad, or a set device or set apparatus may also be included.

FIG. 1 is a rear perspective view illustrating a rear surface of a display device according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating the display device shown in FIG. 1 by cutting a region A-A'.

1 and 2 , a display device according to an embodiment of the present invention may include a display panel 110 , a guide holder 120 , a printed circuit board 130 , and a coupling means 140 .

First, as the display panel 110 , any type of display panel such as a liquid crystal display panel and an electroluminescent display panel may be used. For example, in an electroluminescent display, an organic electroluminescent (OLED) display panel, a quantum-dot light emitting diode (Quantum-dot Light Emitting Diode) display panel, or an inorganic electroluminescent (Inorganic Light Emitting Diode) display panel is can be used

For example, when the display panel 110 is a liquid crystal display panel, it includes a plurality of gate lines and data lines, and pixels formed at intersections of the gate lines and the data lines. And an array substrate including a thin film transistor as a switching element for controlling light transmittance in each pixel, an upper substrate including a color filter and/or a black matrix, and a liquid crystal layer formed between the array substrate and the upper substrate may be included.

In addition, when the display panel 110 is an organic electroluminescence (OLED) display panel, it may include a plurality of gate lines and data lines, and pixels formed at intersections of gate lines and data lines. And an array substrate including a thin film transistor which is a device for selectively applying a voltage to each pixel, and an organic light emitting device (OLED) layer on the array substrate and an encapsulation substrate or phosphorus layer disposed on the array substrate to cover the organic light emitting device layer It may be configured to include an encapsulation substrate and the like. The encapsulation substrate may protect the thin film transistor and the organic light emitting device layer from external impact, and may prevent penetration of moisture or oxygen into the organic light emitting device layer.

As another example, the layer formed on the array substrate may include an inorganic light emitting layer, for example, a nano-sized material layer or quantum dots.

In addition, a pad portion (not shown) connected to each signal line provided in the pixel array may be provided at an edge portion of one side of the array substrate, and the pad portion is connected to a circuit board driving the panel. Although not shown in the drawings, a separate back plate may be attached to the rear surface of the array substrate.

The display panel 110 may include a touch panel disposed on the array substrate. In this case, a touch panel and a polarizing film may be further provided on the upper surface of the array substrate. The polarizing film may provide a function of improving visibility of the display panel 110 by preventing reflection of light introduced from the outside. The touch panel may sense a user's touch signal.

A light control film (LCM) may be provided on the upper portion of the touch panel. The light control film may prevent an increase in the viewing angle in an unnecessary direction by adjusting the angle of light emitted from the display panel 110 . In addition, a cover window 111 may be provided at the outermost portion of the display panel 110 . The cover window 111 may be a cover glass made of a glass material, a cover plastic made of a plastic material, or the like.

In addition, a transparent adhesive layer may be disposed between the polarizing film and the touch panel, between the touch panel and the light control film, and between the light control film and the cover window 111 . The pressure sensitive adhesive (PSA) including an optical clear adhesive (OCA) or a UV curing adhesive (OCR; Optical Clear Resin) may be applied to the adhesive layer.

Hereinafter, the display panel 110 will be described as an example to which the electroluminescent display panel is applied. However, the present invention is not limited thereto. For example, as the display panel 110 , a quantum dot light emitting display panel of an electroluminescent display, an organic light emitting display panel, or an inorganic light emitting display panel may be applied.

A guide holder 120 is attached to the rear surface of the display panel 110 . At this time, although not shown in the drawings, a heat dissipation plate (not shown) made of a metal material having a heat dissipation function may be provided between the display panel 110 and the guide holder 120 . For example, the heat dissipation plate may have a shape corresponding to the shape of the display panel 110 and may be made of an aluminum or copper material having excellent thermal conductivity. Of course, the shape and material of the heat dissipation plate is not limited thereto. For example, the shape of the heat dissipation plate may have a shape corresponding to the position or structure of the display panel 110 or the printed circuit board 130 coupled to the rear surface of the heat dissipation plate. In addition, the material of the heat dissipation plate may be made of one or a plurality of materials of aluminum, gold, silver, magnesium, carbon fiber, graphite, and graphene having excellent thermal conductivity. Alternatively, it may be made of an alloy metal material thereof.

The guide holder 120 may be a component that mechanically couples the display panel 110 and a system to be mounted (eg, a monitor having a display panel, a navigation system, a vehicle dashboard, etc.). That is, since it is difficult to form a fastening structure such as screw coupling to be inserted into a hole other than an attachment structure by adhesion on the rear surface of the display panel 110, the guide holder 120 is attached to the rear surface of the display panel 110 to provide an additional fastening structure. can be implemented

The printed circuit board 130 may transmit a data signal and a driving control signal input from the outside to the display panel 110 . Between the display panel 110 and the printed circuit board 130, a flexible printed circuit board (FPC, see FIG. 1, 132) for electrically connecting the display panel 110 and the printed circuit board 130 is provided. can The flexible printed circuit board 132 includes a film having wiring or a flexible printed circuit board (FPCB), and may be bent or folded.

In the embodiment of the present invention, the printed circuit board 130 is disposed on the rear surface of the guide holder 120 as shown in FIG. 1 . In this case, the flexible circuit board 132 may be bent in an approximately “L” or “U” shape between the display panel 110 and the printed circuit board 130 .

Also, the coupling means 140 is disposed between the guide holder 120 and the printed circuit board 130 .

3 is a reference view illustrating a state in which the thickness of the coupling means 140 shown in FIG. 2 is variable, and FIG. 4 is a perspective view showing a leaf spring pattern of the coupling means 140 shown in FIG. 3 .

3 and 4 , the coupling means 140 includes a first film 141 , a second film 142 , and a leaf spring 143 . The coupling means 140 is attached between the guide holder 120 and the printed circuit board 130 to provide a coupling function thereof, and also prevents vibration from being transmitted to the printed circuit board 130 on the guide holder 120 . It can provide a dust-proof function.

First, the first film 141 is attached to the rear surface of the guide holder 120 , and the second film 142 is attached to the printed circuit board. The leaf spring 143 is elastically deformed while connecting between the first film 141 and the second film 142 to change the distance between the first film 141 and the second film 142 . . That is, the thickness d of the coupling means 140 may be varied by the external deformation of the leaf spring 143 . In addition, it can be easily detached for detachment or maintenance compared to attaching with a general tape structure.

The first film 141 and the second film 142 may have a thin film shape made of an insulating material, and an adhesive material may be applied to an attachment surface thereof.

Since the leaf spring 143 is made of a metal material and has elastic restoring force, deformation may occur between the first film 141 and the second film 142 by an external force. In this way, it is possible to block the transmission of vibration between the guide holder 120 and the printed circuit board 130 by the elastic restoring force of the leaf spring 143 , and the vibration is generated between the guide holder 120 and the printed circuit board 130 . Rattle noise generated during transmission can be eliminated.

The leaf spring 143 has one cross section formed in an approximately “S” shape to have a wave pattern shape, the lowest area of the leaf spring 143 is coupled to the first film 141 , and the highest area is the second It may be coupled to the film 142 . A plurality of leaf springs 143 may be arranged side by side when viewed in a plan view with reference to FIG. 4 . In addition, the wave pattern of the leaf spring 143 may be arranged in a pattern in which the lowest region and the highest region are alternately arranged with each other. Of course, it may be arranged in a pattern in which the same height is arranged side by side.

And, although not shown in the drawings, the plurality of leaf springs 143 may be provided in a coupled state by a connecting shaft (not shown) connecting other adjacent leaf springs. These connecting shafts connect each of the leaf springs 143 to each other and at the same time induce the leaf springs 143 to be restored to the same position in the compression and tension processes, and also prevent the leaf springs 143 from being deformed. .

FIG. 5 is a partially enlarged view illustrating a partially enlarged coupling means of the display device shown in FIG. 2 .

Here, the coupling means 140 may provide a grounding function between the guide holder 120 and the printed circuit board 130 .

First, the printed circuit board 130 is provided with at least one or a plurality of ground terminals 131 . The display panel 110 or the printed circuit board 130 may be damaged while being damaged by electromagnetic interference (EMI) or electrostatic discharge (ESD). This defect is caused by the accumulated charge between the display panel 110 and the printed circuit board (including the driving element, 130) or the display panel 110 and the system on which it is mounted, or when a static unsafe charge is charged to the human body. It may be generated through static electricity, and the ground terminal 131 provides a path for grounding by discharging such static electricity to the outside.

The ground terminal 131 may form a ground path while in contact with the leaf spring 143 made of a metal material in the coupling means 140 .

In the coupling means 140 , an opening 144 is formed while a portion of the second film 142 is removed corresponding to the position of the ground terminal 131 . At this time, the leaf spring 143 is partially exposed on the opening 144 . can Therefore, since the ground terminal 131 and the leaf spring 143 are electrically connected through the opening 144 , a ground path can be formed, and a plurality of these openings 144 are formed according to the number and location of the ground terminals 131 . may be provided to form various ground paths. Although not shown in the drawings, a portion of the leaf spring 140 may be electrically connected to an external component to discharge static electricity. That is, as mentioned above, the leaf spring 140 may be electrically connected to any one mechanical component on which the display panel 110 is mounted among the electric device, the electronic device, and the set device. For example, any one mechanical component may be a heat dissipation plate, a mid frame, a cover bottom, and a bottom case made of a metal material.

6 and 7 are reference views showing another embodiment of the coupling means of the present invention.

In another embodiment of the present invention, the coupling means may have a plate spring 240 in a grid pattern as shown in FIG. 6 .

That is, the leaf spring 240 may include a plurality of first steel wires 2401 arranged side by side in one direction, and a plurality of second steel wires 2402 arranged side by side in a different direction from the first steel wire 2401. have.

In this case, the first steel wire 2401 and the second steel wire 2402 may be a grid pattern formed at a right angle, as shown in FIG. 6 . The first steel wire 2401 and the second steel wire 2402 may each be formed in a lattice pattern of a rectangular or square lattice shape connected to be crossed with each other, such as a fiber weave pattern.

In addition, in another embodiment of the present invention, the coupling means may be formed of a rhombic or Centered Rectangular Lattice lattice pattern of a mesh shape in which the leaf spring 340 is bent multiple times as shown in FIG. 7 .

That is, the leaf spring 340 is a third steel wire 3401 that is bent a plurality of times and is arranged to be long in one direction, and the third steel wire 3401 is arranged side by side, and the fourth bent portion is coupled to cross each other. steel wire 3402 .

In this case, the third steel wire 3401 and the fourth steel wire 3402 may be formed in a lattice pattern in which bent portions are alternately arranged in the same direction to be elongated.

Of course, the leaf springs 240 and 340 using these steel wires only have different pattern shapes, and as in the above embodiment (see FIG. 3 ), between the first film 141 and the second film 142 . It can be arranged to absorb vibrations or shocks while elastically deforming the outer shape according to a change in the thickness (d) of the coupling means, and to be connected to the ground terminal 131 through the opening (see FIG. 2 , 144 ).

Therefore, according to the display device of the present invention, by providing a coupling means between the guide holder and the printed circuit board, it is possible to reduce the transmission of vibration from the outside by changing the thickness of the leaf spring elastically, and between the printed circuit board and the guide holder. It is possible to prevent noise caused by the gap by deleting the gap of the coupling means, and it is possible to prevent damage to the printed circuit board or display panel as the leaf spring of the coupling means is connected to the ground terminal of the printed circuit board to discharge static electricity. there is an effect

In the above, specific embodiments have been described with reference to the drawings to illustrate the technical idea of the present invention, but the present invention is not limited to the same configuration and effects as the specific embodiments as described above, and various modified examples are within the scope of the present invention. It can be carried out within the limit that does not deviate from Accordingly, such modifications should also be regarded as belonging to the scope of the present invention, and the true technical protection scope of the present invention should be determined by the spirit of the claims to be described later.

110: display panel
120: heat dissipation plate
130: printed circuit board
140: coupling means

Claims (9)

display panel;
a guide holder disposed on a rear surface of the display panel;
a printed circuit board connected to the display panel and disposed on a rear surface of the guide holder; and
a coupling means interposed between the guide holder and the printed circuit board so that the thickness is elastically variable;
A display device comprising a. The method according to claim 1,
The coupling means,
a first film attached to the rear surface of the guide holder;
a second film attached to the rear surface of the printed circuit board; and
and a leaf spring for elastically spaced apart while connecting between the first film and the second film. 3. The method according to claim 2,
The leaf spring is made of a metal material and has an “S” shape in one cross-section. 3. The method according to claim 2,
A display device in which a plurality of leaf springs are arranged side by side. 3. The method according to claim 2,
The leaf spring is
A plurality of first steel wires arranged side by side in any one direction,
A display device including a plurality of second steel wires arranged side by side in a different direction from the first steel wire. 6. The method of claim 5,
The leaf spring is a display device in which the first steel wire and the second steel wire are arranged in a grid pattern. 7. The method according to any one of claims 2 to 6,
The printed circuit board is provided with at least one or a plurality of ground terminals,
In the coupling means, an opening through which the leaf spring is exposed is formed in at least a portion or a plurality of regions of the second film to correspond to the position of the ground terminal,
The ground terminal is electrically connected to the leaf spring through the opening. The method according to claim 1,
The coupling means,
A display device formed to have a size at least equal to or smaller than that of the attachment area of the printed circuit board. The method according to claim 1,
The display device further comprising a cover glass disposed on the front surface of the display panel.

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