KR20210085805A - Display apparatus - Google Patents

Abstract

The present invention provides a display device, which includes: a display panel formed of a curved surface along one direction; a cover bottom disposed on a rear surface of the display panel; and a circuit board disposed on a rear surface of the cover bottom and connected to the display panel, wherein the circuit board is provided with a perforated pattern along the other direction perpendicular to the one direction. Accordingly, it is possible to improve a defect in which the circuit board is dropped or cracks occur due to a restoring force.

Description

display device {DISPLAY APPARATUS}

The present invention relates to a display device, and more particularly, to a display device formed with a curved surface.

Recently, as we enter the information age, the field of display that visually expresses electrical information signals has developed rapidly, and in response to this, various display devices (Display Apparatus) with excellent performance of thinness, light weight, and low power consumption have been developed. is being developed

Specific examples of the display device include a Liquid Crystal Display Apparatus (LCD), an Organic Light Emitting Display Apparatus (OLED), and a Quantum Dot Display Apparatus.

Among them, a self-luminous display device such as an organic light emitting display device is considered as a competitive application in order to make the device compact and display vivid colors without requiring a separate light source. The organic light emitting diode display includes a device that emits light in each sub-pixel, and the light emitting device includes two electrodes facing each other and a light emitting layer disposed between the two electrodes to emit light when transported electrons and holes recombine. The organic light-emitting device is a self-luminous device using a thin light-emitting layer between electrodes, and has an advantage that it can be thinned. In addition, since it is implemented without a separate light source device, it is easy to be implemented as a flexible, bendable, or foldable display device, and thus can be designed in various forms.

However, since the organic light emitting display device has a lightweight and thin structure and requires an assembly structure corresponding to the curved surface of the display panel, it is difficult to combine a structure that does not have a curved surface corresponding to the curved surface of the display panel. Therefore, optimization for each display device shape or usage environment is required.

The present invention has been made to solve the above problems, and more particularly, to provide a display device having a perforated pattern so that a circuit board can be flexibly bent to correspond to a curved surface of a curved display device.

Another object of the present invention is to provide a display device capable of preventing a defect in which a crack is generated on a circuit board or a fixing tape is dropped along a curved surface of the curved display device.

In order to solve the above problems, the present invention provides a display panel having a curved surface along one direction; a cover bottom disposed on a rear surface of the display panel; and a circuit board disposed on a rear surface of the cover bottom and connected to the display panel. and a display device in which the circuit board is provided with a perforated pattern along the other direction perpendicular to the one direction.

The circuit board may be bent along the one direction with respect to the perforated pattern.

The perforated patterns may be disposed at equal intervals on the circuit board.

The circuit board may be coupled to a rear surface of a flexible printed circuit board connected to the display panel, and the perforated pattern may be disposed in a region between the flexible printed circuit board and another adjacent flexible printed circuit board.

The circuit board may have a component area in which a plurality of components are mounted on a rear surface thereof, and the perforated pattern may be disposed between the component area and other adjacent component areas.

The perforated pattern may be formed in a polygonal shape having a cross section of a triangle or more, or a circle or oval shape.

The width of the perforated pattern may gradually decrease from one surface of the circuit board toward the other surface.

The perforated pattern may include a shielding film disposed in a pattern in which a plurality of through-holes are set in a unit area, and shielding at least a part of the inside of the through-hole.

The shielding layer may be disposed adjacent to a rear surface of the circuit board.

The shielding layer may be thinner than a component region in which the component of the circuit board is mounted.

A display device according to an embodiment of the present specification,

First, by adding a perforated pattern to the circuit board, it can be attached to correspond to the curved display model,

Second, since the circuit board can be bent to correspond to the curved surface of the display panel, it is possible to improve defects in which the circuit board falls or cracks due to restoring force.

Third, there is an effect of reducing material cost while securing image quality through defect improvement.

The effects of the present specification are not limited to only the effects mentioned above, and other incidental effects not mentioned will be clearly understood by those skilled in the art from the following description.

Since the contents of the invention described in the problems to be solved, the means for solving the problems, and the effects do not specify the essential characteristics of the claims, the scope of the claims is not limited by the matters described in the contents of the invention.

1 is a perspective view illustrating the interior of a vehicle in which a display device according to an embodiment of the present invention is installed.
FIG. 2 is a cross-sectional view illustrating a region AA′ of the display device shown in FIG. 1 .
FIG. 3 is a rear perspective view showing the display device shown in FIG. 1 .
FIG. 4 is a reference diagram illustrating a state in which a circuit board is attached to the rear surface of the display device shown in FIG. 3 .
FIG. 5 is a partially enlarged view illustrating a perforated pattern of the circuit board shown in FIG. 4 .
6 is a reference diagram illustrating various embodiments of a perforated pattern provided in the circuit board of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are exemplary, and thus the present invention is not limited to the illustrated matters. Like reference numerals refer to like elements throughout. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. When 'including', 'having', 'consisting', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the case in which the plural is included is included unless otherwise explicitly stated.

In interpreting the components, it is interpreted as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'beside', etc., 'right' Alternatively, one or more other parts may be positioned between the two parts unless 'directly' is used.

In the case of a description of a temporal relationship, for example, 'immediately' or 'directly' when a temporal relationship is described with 'after', 'following', 'after', 'before', etc. It may include cases that are not continuous unless this is used.

Although the first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the spirit of the present invention.

In describing the components of the present specification, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, order, or number of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but other components may be interposed between each component. It will be understood that each component may be “interposed” or “connected”, “coupled” or “connected” through another component.

As used herein, the term “display device” refers to a liquid crystal module (LCM) including a display panel and a driving unit for driving the display panel, an organic light emitting module (OLED Module), and a quantum dot module (Quantum Dot Module). It may include a display device. And, an electric field including a notebook computer, a television, a computer monitor, an automotive display or other type of vehicle, which is a complete product or final product including LCM, OLED module, QD module, etc. A set electronic device such as an equipment display, a mobile electronic device such as a smart phone or an electronic pad, or a set device or set apparatus may also be included.

Accordingly, the display device in the present specification may include a set device that is a narrow display device itself such as an LCM, an OLED module, a QD module, and an application product or an end-user device including an LCM, an OLED module, a QD module, etc. .

And, in some cases, the LCM, OLED module, and QD module composed of the display panel and the driver are expressed as a narrow “display device”, and the electronic device as a finished product including the LCM, OLED module, and QD module is “set” It can also be expressed as "device". For example, a display device in the narrow sense includes a liquid crystal (LCD), organic light emitting (OLED) or quantum dot display panel, and a source PCB that is a control unit for driving the display panel, and the set device is connected to the source PCB. It may be a concept further including a set PCB, which is a set controller that is electrically connected to control the entire set device.

The display panel used in this embodiment includes all types of liquid crystal display panels, organic light emitting diode (OLED) display panels, quantum dot (QD) display panels, electroluminescent display panels, etc. of the display panel may be used, and is not limited to a specific display panel capable of bezel bending with the flexible substrate for the organic light emitting (OLED) display panel and the lower back plate support structure of the present embodiment. In addition, the display panel used in the display device according to the embodiment of the present specification is not limited to the shape or size of the display panel.

For example, when the display panel is an organic light emitting (OLED) display panel, it may include a plurality of gate lines and data lines, and pixels formed at intersections of the gate lines and the data lines. In addition, an array including a thin film transistor, which is a device for selectively applying a voltage to each pixel, an organic light emitting device (OLED) layer on the array, and an encapsulation substrate or an encapsulation layer disposed on the array to cover the organic light emitting device layer (Encapsulation) and the like may be configured. The encapsulation layer 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. In addition, the layer formed on the array may include an inorganic light emitting layer, for example, a nano-sized material layer or quantum dots.

FIG. 1 is a perspective view illustrating the interior of a vehicle in which a display device according to an embodiment of the present invention is installed, and FIG. 2 is a cross-sectional view illustrating a region A-A′ of the display device shown in FIG. 1 .

The display panel shown in FIG. 1 will be described with an organic electroluminescence display panel (OLED) as an example.

1 and 2 , the display device 100 according to an embodiment of the present invention may be applied in a substantially rectangular shape. The shape of the display device 100 is not necessarily limited to a rectangular shape, and various shapes to which polygons or curves are applied can be manufactured. The display device 100 may include a display panel 110 , a cover bottom 120 , and a circuit board 130 .

The display device 100 may have a cover window 111 attached to the front in a state in which the display function and the touch function are integrated. The display panel 110 may be disposed on the rear surface of the cover window 111 . The display device 100 may be disposed on the dashboard 11 or the center fascia 12 side of the vehicle dashboard 10 . The display panel 110 can be made of a hard material, but in the case of an organic light emitting display panel, it can also be manufactured with a flexible structure. The flexible display panel 110 can be deformed to be concave or convex depending on the shape of the dashboard 10 , so that the design can be freely performed. In this case, the cover window 111 may be a cover glass made of a glass material.

A heat sink (not shown) may be provided on the rear surface of the display panel 110 . The heat sink may have a shape corresponding to the shape of the display panel 110 and may be made of aluminum or copper having excellent thermal conductivity. Of course, the shape and material of the heat sink is not limited thereto. For example, the shape of the heat sink may have a shape corresponding to the position or structure of the display panel 110 or the circuit board 130 coupled to the rear surface of the heat sink. In addition, the material of the heat sink may include any one or a plurality of materials of gold, silver, magnesium, carbon fiber, graphite, and graphene having excellent thermal conductivity.

When the display panel 110 is applied as a liquid crystal display panel, it may be applied in a structure in which a backlight unit (not shown) is provided on the rear surface of the display panel 110 .

The display device 100 may include a guide panel 20 supporting the display panel 110 , and a cover bottom 120 coupled to the rear surface of the display panel 110 . In the embodiment of the present invention, the circuit board 130 is disposed on the rear surface of the cover bottom 120 . Of course, the flexible circuit board 140 connected from the display panel 110 may be bent while extending to cover one side of the cover bottom 120 to connect the circuit board 130 .

FIG. 3 is a rear perspective view showing the display device shown in FIG. 1 , FIG. 4 is a reference view showing a state in which a circuit board is attached to the rear surface of the display device shown in FIG. 3 , and FIG. 5 is the circuit board shown in FIG. It is a partial enlarged view showing the perforated pattern by magnifying it.

3 to 5 , in the display device 100 according to an embodiment of the present invention, one or a plurality of circuit boards 130 may be coupled to the rear surface of the cover bottom 120 .

Here, the circuit board 130 may be a printed circuit board (PCB) that transmits an externally input data signal and a driving control signal to the display panel 110 . A flexible printed circuit (FPC) for electrically connecting the display panel 110 and the circuit board 130 may be provided between the display panel 110 and the circuit board 130 . Such a flexible circuit board includes a film or a flexible printed circuit board (FPCB) having wiring, and can be bent or folded.

In this case, the circuit board 130 may include a first circuit board 131 connected to the display panel 110 through a plurality of flexible circuit boards 140 on the rear surface of the cover bottom 120 . In this case, the first circuit board 131 may be a source printed circuit board (S-PCB). In addition, the circuit board 130 may include a second circuit board 132 connected to the timing controller or the touch panel. In this case, the second circuit board 132 may be a control printed circuit board (C-PCB). For example, since there are many wirings on the first circuit board 131 , it is disposed on the lower side of the display device for easy connection to the flexible circuit board 140 , and the second circuit board 132 is the first circuit board 131 . It may be disposed on a central portion or an upper portion of the rear surface of the display device so as to extend from the . Of course, various driving chips including a drive IC may be disposed on the first circuit board 131 .

Although not shown in the drawings, a cover shield (not shown) covering the rear surface of the circuit board 130 may be provided.

As shown in FIG. 4 , the circuit board 130 may also be coupled to the rear surface of the flat display device in a planar shape. At this time, since the perforated pattern P is formed on the circuit board 130 , even if the display device is bent while the circuit board 130 is coupled to the back surface of the cover bottom 120 , the circuit board corresponds to the shape of the curved display device. 130 may be bent. That is, since the perforated pattern P of the circuit board 130 has a structure in which a plurality of through holes 133 are formed to penetrate the circuit board 130 , in the region where the perforated pattern P is formed, the perforated pattern P is the center. Bending of the circuit board 130 may be facilitated. Even when a plurality of perforated patterns P are disposed, the circuit board 130 may be bent around each perforated pattern P.

Also, although not shown in the drawings, the display device may be manufactured to have a curved surface, and the circuit board 130 may be disposed on the rear surface of the curved cover bottom 120 , and the circuit board 130 may be attached to correspond to the curved surface. Alternatively, a curved display device may be prepared, and the circuit board 130 may be coupled to the back surface of the cover bottom 120 in a state of being bent to correspond to the curved surface of the display device.

In the circuit board 130 , a plurality of component regions on which a plurality of components are mounted may be provided, and a perforated pattern P may be disposed between each component region and other adjacent component regions. In addition, the perforation pattern P may be disposed at equal intervals between each part area. In addition, the circuit board 130 is connected to the display panel 110 by the flexible circuit board 140 . In this case, a perforated pattern P may be disposed between the plurality of flexible circuit boards 140 . That is, in the circuit board 130 , the perforated pattern P may be disposed in a region between the flexible printed circuit board 140 and another adjacent flexible printed circuit board.

5 is an enlarged view of the structure of the perforated pattern (P). In the perforated pattern, a plurality of through-holes 133 are arranged in a pattern set within a unit area, and each of the through-holes 133 may have a cross section of a polygonal shape of a triangle or more, or a circle or oval shape. In the embodiment of the present invention, the through hole 133 having a substantially rectangular cross-section is shown as an example. In the perforated pattern P, a connecting portion 135 connected to a portion of the circuit board 130 is disposed between the through hole 133 and an adjacent through hole, and the connecting portion 135 is disposed in the horizontal direction of the through hole 133 and They are all arranged in the longitudinal direction, and their spacing may be the same or different from each other. In the embodiment of the present invention, as an example, the thickness of the connecting portion 135 in the horizontal direction between the through hole 133 and another adjacent through hole is formed to be thicker than the thickness of the connecting portion 135 in the vertical direction based on FIG. 5 . For example, while the shape of the through hole 133 is arranged in a circle or oval shape, the connection part may be applied in a curved or wavy shape (or a zigzag pattern).

And it is preferable that the perforated pattern (P) is formed with a spacing of at least 1 mm or more from the component area. In other words, in the perforated pattern P, the thickness of the connection part 135 between the through hole 133 and another adjacent through hole may be formed to have a thickness of at least 1 mm or more in the horizontal or vertical direction. Here, the distance between the connecting portions 135 in the vertical direction may be the thickness of the connecting portion 135 disposed between the first through hole 133 at the uppermost or lowermost end of the circuit board 130 . In addition, in the perforated pattern P, it is preferable that the through-holes 133 and the connecting portions 135 are arranged in a structure of at least three rows or more. Of course, the spacing and the number of columns at the beginning of the perforated pattern (P) are not limited thereto. For example, the starting portion of the perforated pattern P is to prevent the perforation pattern P from being damaged or separated due to excessive bending in the process of bending the circuit board 130 at an interval and the minimum number of columns. In addition, when the minimum number of rows of the perforation pattern P is maintained, the bent portion between the component area and the adjacent component area may be formed as a curved surface.

6 is a reference diagram illustrating various embodiments of a perforated pattern provided in the circuit board of the present invention.

Referring to FIG. 6 , the perforated pattern on the circuit board 130 may be implemented in various shapes or patterns.

First, referring to FIG. 6( a ), the perforated pattern P1 is formed in a pattern in which the through-holes 133a having the same width in the direction from one surface of the circuit board 130 to the other are set as described above. . Here, one surface of the circuit board 130 may be a rear surface. That is, it may be the outermost surface (the lowermost surface) of the display device 100 based on FIG. 2 .

Referring to FIG. 6B , the perforated pattern P2 may have a shape in which the inner width of the through hole 133b gradually decreases from one surface to the other. Such a structure is a drilling machine or a triangular or trapezoidal shape in one cross section. Through milling, the size of the through-holes 133b on one surface and the other surface of the circuit board 130 may be different. Of course, the processing method is not limited thereto. The structure in which the size of the through hole 133b is deformed as described above may more easily correspond to the curved surface of the display device 100 . For example, the circuit board 130 coupled to the curved display panel 110 having a concavely curved front surface has a large size d1 of the through hole 133b on one side and a size d1 of the through hole 133b on the other side. d2) is relatively small, so that the other side is concave and the other side is convex, so that it can be coupled to the display panel 110 . That is, the size of the through hole 133b of the convex surface of the circuit board 130 may be larger. Of course, the sizes of the through-holes 133b on one surface and the other surface of the circuit board 130 may be applied in reverse.

Referring to FIG. 6( c ), in the perforated pattern P3 , a plurality of through-holes 133c are disposed in a unit area, and in this case, the circuit board 130 has a shielding film 134 that partially or completely shields the inside of the through-hole 133c. ) may be included.

The shielding film 134 may have a configuration remaining while only a part of the through hole 133c of the circuit board 130 is processed. Here, the through hole 133c preferably means a hole passing through the circuit board 130 , but may not be penetrated and may have a configuration in which only a part of the through hole 133c is processed in the shape of a groove. Therefore, the shielding film 134 may be of a configuration remaining after drilling only one surface of the circuit board 130 and not passing through, or in the middle while processing the same area of one surface and the other surface of the circuit board 130 facing each other. It may be a configuration that has not penetrated and remains. In this case, the shielding film 134 may partially penetrate inside the through hole 133c of the circuit board 130 , and a portion may remain in the shape of a flange. Accordingly, the shielding layer 134 is formed to be thinner than the component area PA in which the component of the circuit board 130 is mounted. This shielding film 134 requires a structure that prevents the circuit board 130 from penetrating, or when it requires coupling with other devices on one side or the back side through the perforated pattern P3, or when coupling with screws or bolts, etc. It can be applied when a counter sink or counter bore is required in the center of the structure. In this case, the shielding layer 134 may be disposed at a central portion of the through hole 133c.

Referring to FIG. 6(d), the shielding film 134 of the perforated pattern p4 has the same effect as the structure of FIG. 6(b), the shielding film 134 is formed in the through hole 133d inside the circuit board 130. It may be arranged to be closer to one side. That is, the surface on which the shielding film 134 is disposed close may be one surface of the circuit board 130 , and may be the surface disposed on the outermost side of the display device with reference to FIG. 2 .

Therefore, according to the display device according to the embodiment of the present invention, by adding a perforated pattern to the circuit board, it can be attached to correspond to a curved display model, and since the circuit board can be bent to correspond to the curved surface of the display panel, the restoring force is reduced Defects in which the circuit board falls or cracks can be improved by this, and there is an effect of reducing material costs while securing image quality through defect improvement.

Features, structures, effects, etc. described in the above-described examples of the present application are included in at least one example of the present application, and are not necessarily limited to only one example. Furthermore, features, structures, effects, etc. illustrated in at least one example of the present application may be combined or modified with respect to other examples by those of ordinary skill in the art to which the present application belongs. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present application.

The present application described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which this application belongs that various substitutions, modifications, and changes are possible within the scope not departing from the technical matters of the present application. It will be clear to those who have the knowledge of Therefore, the scope of the present application is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present application.

100: display device
110: display panel
120: heat sink
130: circuit board
131: first circuit board
132: second circuit board

Claims (10)

a display panel formed of a curved surface along one direction;
a cover bottom disposed on a rear surface of the display panel;
a circuit board disposed on a rear surface of the cover bottom and connected to the display panel; including,
The circuit board is a display device provided with a perforated pattern along the other direction perpendicular to the one direction. The method according to claim 1,
The circuit board is
The display device is curved along the one direction with respect to the perforated pattern. The method according to claim 1,
The perforation pattern is
A display device disposed at equal intervals on the circuit board. The method according to claim 1,
The circuit board includes a flexible printed circuit board connected to the display panel coupled to a rear surface of the circuit board, and the perforated pattern is disposed in a region between the flexible printed circuit board and another adjacent flexible printed circuit board. The method according to claim 1,
The circuit board is
A component region is formed in which a plurality of components are mounted on the rear surface,
The perforation pattern is disposed between the component area and another adjacent component area. The method according to claim 1,
The perforation pattern is
A display device having a cross section of a polygon or a circle or an ellipse having a cross section of a triangle or more. The method according to claim 1,
The perforation pattern is
A display device whose width gradually decreases from one surface of the circuit board toward the other. The method according to claim 1,
The perforation pattern is
A display device comprising: a plurality of through-holes arranged in a set pattern in a unit area; 9. The method of claim 8,
The shielding layer is disposed adjacent to a rear surface of the circuit board. 9. The method of claim 8,
The shielding layer has a thickness thinner than that of a component area in which the component of the circuit board is mounted.

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