KR20230005652A - Display device - Google Patents

Abstract

According to an embodiment of the present invention, a display device includes: a display unit for displaying an image; and a bottom cover covering a rear surface of the display unit, wherein a lower end of the bottom cover obliquely extends to the rear of the display unit to form an extension unit on which a main board is seated, and a slim design may be realized by reducing overall thickness.

Description

Display device {DISPLAY DEVICE}

The present invention relates to a display device, and more particularly, to a display device having a stand fixing structure.

Currently, as we enter the information age in earnest, the field of display devices that visually display electrical information signals is rapidly developing, and research is continuing to develop performance such as thinning, lightening, and low power consumption for various display devices.

Representative display devices include a liquid crystal display device (LCD), an electro-wetting display device (EWD), and an organic light emitting display device (OLED).

The liquid crystal display device includes a liquid crystal display panel formed by bonding an upper substrate and a lower substrate through a liquid crystal layer, a driving circuit for applying a predetermined driving signal to the liquid crystal display panel, and an assembly component for assembling the liquid crystal display panel and the driving circuit. and further includes various components according to application fields such as computer monitors or televisions.

An object to be solved by the present invention is to provide a display device having a stand fixing structure having a slim overall thickness.

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

In order to solve the above problems, a display device according to an embodiment of the present invention includes a display unit for displaying an image and a bottom cover covering a rear surface of the display unit, and a lower end of the bottom cover extends to the rear of the display unit. It may be extended obliquely to constitute an extension portion on which the main board is seated.

Other embodiment specifics are included in the detailed description and drawings.

According to the present invention, a bottom cover bending structure is applied to the bottom of the display unit, and a circuit component is disposed on the bottom cover bending structure instead of the rear surface of the display unit, thereby reducing the overall thickness and realizing a slim design.

According to the present invention, only a minimum structure for fixing a hinge can be left on the rear surface of the display unit, so that a clean and differentiated design can be implemented.

Effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present invention.

1 is a rear view of a display device according to a first embodiment of the present invention.
2 is a side view of a display device according to a first embodiment of the present invention.
3 is a side view of a display device according to a comparative example.
4A and 4B are front and rear views of the display unit shown in FIG. 1 .
Fig. 5 is a side view taken along A-A' of Fig. 4a;
Fig. 6 is a cross-sectional view taken along A-A' of Fig. 4A.
7 is a cross-sectional view of a display device according to a second exemplary embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various forms different from each other, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative, so the present invention is not limited to the details shown. In addition, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, when 'includes', 'has', 'consists of', etc. mentioned in this specification is used, other parts may be added unless 'only' is used. In the case where a component is expressed in the singular, the case including the plural is included unless otherwise explicitly stated.

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

In the case of a description of a positional relationship, for example, 'on top of', 'on top of', 'at the bottom of', 'next to', etc. Or, unless 'directly' is used, one or more other parts may be located between the two parts.

When an element or layer is referred to as being on another element or layer, it includes all cases where another element or layer is directly on top of another element or another layer or another element is interposed therebetween.

Although 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. Therefore, the first component mentioned below may also be the second component within the technical spirit of the present invention.

Like reference numbers designate like elements throughout the specification.

The size and thickness of each component shown in the drawings are shown for convenience of description, and the present invention is not necessarily limited to the size and thickness of the illustrated components.

Each feature of the various embodiments of the present invention can be partially or entirely combined or combined with each other, and as those skilled in the art can fully understand, various interlocking and driving operations are possible, and each embodiment can be implemented independently of each other. It may be possible to implement together in an association relationship.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a rear view of a display device according to a first embodiment of the present invention.

2 is a side view of a display device according to a first embodiment of the present invention.

1 and 2 show a display device having a stand fixing structure.

Referring to FIGS. 1 and 2 , the display device 100 according to the first embodiment of the present invention is installed on the display unit 110 displaying an image and under the display unit 110 to support the load of the display unit 110. It includes a stand part 120 for supporting, and can constitute one set.

The display device 100 having such a stand fixing structure is used as a stand structure to be placed on the floor of a predetermined space like a computer monitor or television.

In addition, although not shown, the display device 100 according to the first embodiment of the present invention may include a cover portion surrounding the outside of the display portion 110, and the cover portion may be divided into a front portion and a rear portion. For convenience of explanation, it will be referred to as the display unit 150 including both the display unit 110 and the cover unit.

The cover unit may include a bottom cover 155 covering a rear surface of the display unit 110 and a top case wrapped along a front edge of the display unit 110 and coupled to a side surface of the bottom cover 155 . However, the present invention is not limited thereto, and the top case may be omitted in order to implement a narrow bezel.

The display unit 110 is a panel for displaying an image to a user.

A display element for displaying an image, a driving element for driving the display element, and wires for transmitting various signals to the display element and the driving element may be disposed in the display unit 110 . The display element may be defined differently depending on the type of display unit 110. For example, when the display unit 110 is a liquid crystal display panel, the display unit 110 is interposed between upper and lower substrates and upper and lower substrates. It may be configured to include a liquid crystal layer.

Hereinafter, it is assumed that the display unit 110 is a liquid crystal display panel, but the present invention is not limited thereto. When the display unit 110 is an organic light emitting display panel, the display element may be an organic light emitting element including an anode, an organic light emitting layer, and a cathode.

The display unit 110 may include upper and lower substrates and a liquid crystal layer interposed between the upper and lower substrates. A liquid crystal display device is a flat panel display device that displays an image by controlling light transmittance according to an arrangement of liquid crystal molecules in a liquid crystal layer when light is transmitted.

A backlight unit for supplying light and a bottom cover 155 accommodating the backlight unit and the display unit 110 may be disposed behind the display unit 110 . In this case, the backlight unit may include a light source and an optical means for supplying light generated from the light source to the display unit 110 .

The bottom cover 155 surrounds the rear and side surfaces of the display unit 110, and may stack the backlight unit and the display unit 110 from the lowest layer and store them therein.

Meanwhile, the stand unit 120 supports the display unit 150 and may support the display unit 150 to stand upright on a flat table.

To this end, the stand unit 120 includes, for example, a fixed plate 123 coupled to the rear surface of the bottom cover 155 and a fixed plate 123 so that the vertical angle (tilt) of the display unit 150 can be adjusted. The tilt control unit 124 integrally formed in the support unit 121 coupled to the tilt control unit 124 to support the display unit 150 and the load provided on the bottom surface of the support unit 121 to support the display unit 150 It may be composed of a supporting plate 122 for supporting.

Although not shown, the fixing plate 123 may be formed with a plurality of through holes to be fastened to the rear surface of the bottom cover 155 through screws, but is not limited thereto.

When assembling the rear surface of the bottom cover 155 and the stand part 120, in order to prevent the stand part 120 from being moved on the rear surface of the bottom cover 155, the fixing plate 123 of the stand part 120 A plurality of binding protrusions may be formed at the bottom. In addition, a locking protrusion groove coupled to a locking protrusion of the fixing plate 123 may be formed at a predetermined position of the bottom cover 155 to which the stand unit 120 is screwed. However, the present invention is not limited thereto.

Meanwhile, in the case of the first embodiment of the present invention, a bending structure of the bottom cover 155 is applied to the bottom of the display unit 150, and a circuit component such as a main board 140 is attached to the display unit 150. ) It is characterized in that it is disposed on the lower bending portion (150a) instead of the rear surface. That is, the bottom of the bottom cover 155 is bent toward the rear of the display unit 150 to form a predetermined bending portion 150a, and a circuit component such as the main board 140 is placed at the bottom instead of the back of the display unit 150. It is characterized in that it is possible to implement a slim design by reducing the overall thickness (D) by placing it in the bending portion (150a) of the.

In particular, since only a minimum structure for fixing the hinge can be left on the rear surface of the display unit 150, a clean and differentiated design can be implemented.

That is, conventionally, the thickness is increased by arranging all circuit components such as a main board and a hinge structure on the rear surface of the display unit, which will be described with reference to FIG. 3 .

3 is a side view of a display device according to a comparative example.

Referring to FIG. 3 , the display device according to the comparative example includes a display unit 10 displaying an image and a stand unit 20 installed under the display unit 10 to support a load of the display unit 10 .

The stand unit 20 is integrally formed with the fixed plate 23 coupled to the rear surface of the bottom cover 55 and the fixed plate 23 to adjust the vertical angle (tilt) of the display unit 50. (24), a support portion 21 coupled to the tilt control unit 24 to support the display unit 50, and a support plate 22 provided on the bottom surface of the support portion 21.

At this time, in the display device according to the comparative example, the thickness D′ is increased by disposing circuit components such as a main board, a source printed circuit board, and a cable connector and a hinge structure on the rear surface of the display unit 50. , the lower end of the display unit 50 protrudes convexly, which limits the implementation of a slim design. That is, the thickness of the display unit 50 can be reduced, but the lower end of the display unit 50 on which the main board is disposed protrudes convexly, so that the thickness D' of the entire set becomes thicker.

In addition, as the thickness (D′) of the entire set increases, the size and design of the stand unit 20 are also limited.

In addition, as the number of assembly parts such as screws and pemnuts for coupling the bottom cover 55 to circuit components and the stand part 20 increases, mold and processing costs of the bottom cover 55 increase. In addition, since a guide panel is used for assembly, the process is complicated, and the mold and cost are increased.

Therefore, according to the present invention, the lower end of the bottom cover 155 is bent toward the rear of the display unit 150 to form the bent part 150a, and circuit components such as the main board 140 are bent at the lower end of the bent part 150a. It is characterized by implementing a slim design by reducing the overall thickness by placing it in, and will be described in detail with reference to FIGS. 4 to 6.

4A and 4B are front and rear views of the display unit shown in FIG. 1 .

Fig. 5 is a side view taken along A-A' of Fig. 4a;

Fig. 6 is a cross-sectional view taken along A-A' of Fig. 4A.

That is, FIGS. 4A and 4B show the front and rear surfaces of the display unit 150 including the bottom cover 155 having the bent portion 110a according to the first embodiment of the present invention.

In addition, FIG. 5 schematically shows a side view of the display device 100 taken along AA' of FIG. 4A, and FIG. 6 shows a cross-section of the display device 100 taken along AA' of FIG. 4A in detail. there is.

In FIGS. 5 and 6, the configuration of the stand unit is omitted for convenience.

First, referring to FIGS. 4A and 4B , the display device 100 according to the first embodiment of the present invention may include a display panel 100, a flexible film 118, and a source printed circuit board 119. there is.

The display unit 110 may include upper and lower substrates 111 and 112 and a liquid crystal layer (not shown) interposed between the upper and lower substrates 111 and 112 .

Hereinafter, description will be made on the assumption that the display unit 110 is a liquid crystal display panel, but as described above, it is not limited thereto. When the display unit 110 is an organic light emitting display panel, the display element may be an organic light emitting element including an anode, an organic light emitting layer, and a cathode.

Here, although not shown in the figure, sub-pixels are defined by crossing a plurality of gate lines and data lines on the inner surface of the lower substrate 112, commonly called an array substrate or a first substrate, under the premise of an active matrix method, and each intersection point Each thin film transistor is provided and connected to a pixel electrode formed in each sub-pixel.

In addition, red (R), green (G), and blue (B) color filters corresponding to each sub-pixel are placed on the inner surface of the upper substrate 111, which is called a color filter substrate or a second substrate, respectively. A black matrix covering non-display elements such as gate lines, data lines, and thin film transistors, and a common electrode covering them are provided.

However, when the liquid crystal display is in an in-plane switching (IPS) mode or a fringe field switching (FFS) mode, the common electrode may be formed on the lower substrate 112 .

Also, upper and lower polarizers 114 that selectively transmit only specific light may be attached to outer surfaces of the upper and lower substrates 111 and 112 , respectively.

A sealing means 113 such as a sealant for sealing the side surfaces of the upper and lower substrates 111 and 112 may be provided on edge sides of the upper and lower substrates 111 and 112 excluding the lower side. As the sealing means 113 also serves to fix the upper and lower substrates 111 and 112, the existing top case can be omitted, thereby reducing the bezel width.

Meanwhile, the display unit 110 may include a display area AA and a non-display area NA.

The display area AA is an area where an image is displayed on the display unit 110 .

A plurality of sub-pixels constituting a plurality of pixels and a circuit for driving the plurality of sub-pixels may be disposed in the display area AA. A plurality of sub-pixels is a minimum unit constituting the display area AA, and a display element may be disposed in each of the plurality of sub-pixels, and the plurality of sub-pixels may constitute a pixel. For example, a thin film transistor serving as a switching element may be disposed in each of the plurality of sub-pixels, but is not limited thereto. In addition, a circuit for driving a plurality of sub-pixels may include driving elements and wires. For example, the circuit may include, but is not limited to, a thin film transistor, a storage capacitor, a gate line, and a data line.

The non-display area NA is an area in which an image is not displayed.

In FIG. 4A , the non-display area NA is illustrated as surrounding the rectangular display area AA, but the shape and arrangement of the display area AA and the non-display area NA are limited to the example shown in FIG. 4A. It doesn't work.

In other words, the display area AA and the non-display area NA may have shapes suitable for the design of an electronic device in which the display device 100 is mounted. For example, another exemplary shape of the display area AA may be a pentagonal shape, a hexagonal shape, a circular shape, or an elliptical shape.

Various wires and circuits for driving the liquid crystal display elements of the display area AA may be disposed in the non-display area NA. For example, a wiring for transmitting signals to a plurality of sub-pixels and circuits of the display area AA or a driving IC such as a gate driver IC or a data driver IC may be disposed in the non-display area NA. Not limited.

The display device 100 may include various additional elements for generating various signals or driving pixels in the display area AA. Additional elements for driving the pixels may include an inverter circuit, a multiplexer, an electro static discharge (ESD) circuit, and the like. The display device 100 may also include additional elements related to functions other than pixel driving. For example, the display device 100 may include additional elements providing a touch sensing function, a user authentication function (eg, fingerprint recognition), a multi-level pressure sensing function, and a tactile feedback function. Additional elements may be located in the non-display area NA and/or an external circuit connected to the connection interface.

The flexible film 118 is a film in which various components are disposed on a flexible base film. In detail, the flexible film 118 is a film for supplying signals to a plurality of sub-pixels and circuits in the display area AA, and may be electrically connected to the display unit 110 . The flexible film 118 is disposed on one end of the non-display area NA of the display unit 110 to supply power voltages, data voltages, and the like to a plurality of sub-pixels and circuits in the display area AA. Meanwhile, the number of flexible films 118 may be variously changed according to design, but is not limited thereto.

A driving IC such as, for example, a data driver IC may be disposed on the flexible film 118 . The driving IC is a component that processes data signals for displaying images and driving signals for processing them. The driving IC may be disposed in a manner such as a chip on glass (COG), a chip on film (COF), or a tape carrier package (TCP) depending on a mounting method.

The source printed circuit board 119 may be disposed on one end of the flexible film 118 and connected to the flexible film 118 . The source printed circuit board 119 is a component that supplies signals to the driving IC. The source printed circuit board 119 may supply various signals such as driving signals and data signals to the driving IC. For example, a data driver for generating data signals may be mounted on the source printed circuit board 119, and the generated data signals are supplied to a plurality of sub-pixels and circuits of the display unit 110 through the flexible film 118. It can be. The number of source printed circuit boards 119 may be variously changed according to design, but is not limited thereto.

Meanwhile, a backlight unit for supplying light and a bottom cover 155 accommodating the backlight unit and the display unit 110 may be disposed on the rear surface of the display unit 110 configured as described above.

The backlight unit includes a light source 157 housed in the bottom cover 155, a light guide plate 151 supplying surface light to the display unit 110 through the light source 157, and a reflector 153 disposed on the rear surface of the light guide plate 151. ) and a plurality of optical sheets 152 disposed on the upper surface of the light guide plate 151, but are not limited thereto.

For example, the light source 157 may be configured as an LED package in which LEDs are mounted, and may be disposed on a light incident surface area of the light guide plate 151 . An LED printed circuit board 158 on which an LED package is mounted on the rear surface of the light source 157 may be disposed.

The LED printed circuit board 158 may extend to the outside and may mount the LED connector 156 disposed on the rear surface of the bottom cover 155 . At this time, the LED connector 156 is characterized in that the protrusion to the rear is reduced compared to the conventional case for a slim design, and the source printed circuit board 119 is also characterized in that the width is reduced compared to the conventional one.

Light propagating to the light incident surface of the light guide plate 151 may be emitted toward an upper portion where the display unit 110 is disposed while passing through several total reflection processes inside the light guide plate 151 .

At this time, the light guide plate 151 may include a pattern of a specific shape on the rear surface to supply a uniform surface light source. The pattern may be configured in various ways, such as an elliptical pattern, a polygonal pattern, or a hologram pattern, in order to guide light incident to the inside of the light guide plate 151. ) It may be formed on the lower surface of the printing method or injection method.

The optical sheet 152 may include a diffusion sheet that diffuses surface light emitted from the light guide plate 151, a prism sheet that condenses the light, and a protective sheet that protects the prism sheet and diffuses the light. Not limited.

The bottom cover 155 according to the first embodiment of the present invention has a square frame shape, and includes a lower portion 155a and a side portion 155b vertically bent from the lower portion 155a to cover the back and side surfaces of the backlight unit. can include At this time, the side portion 155b may be configured to be vertically bent at four corners of the lower portion 155a, but is not limited thereto.

And, the bottom cover 155 according to the first embodiment of the present invention further includes upper portions 155c' and 155c" that are bent inwardly and outwardly at the side portion 155b to seat the rear edge of the display unit 110. can do.

The upper portions 155c' and 155c" of the bottom cover 155 are bent inward from the upper, left, and right side portions 155b to seat the upper, left, and right edges of the display unit 110 on the first upper portion 155c'. ) and a second upper portion 155c″ that is bent outward from the lower side portion 155b to seat the lower edge of the display unit 110.

Here, the second upper portion 155c" faces one end of the non-display area NA of the display unit 110 to which the flexible film 118 is connected, while the first upper portion 155c' faces the non-display area NA. The first upper part 155c' and the lower part 155a of the bottom cover 155 may be formed to face each other with the side part 155b interposed therebetween. According to this, the bottom cover ( 155) may be formed in a "c" shape. At this time, a backlight unit is provided between the first upper part 155c' and the lower part 155a of the "c" shaped bottom cover 155. can be stored.

The second upper portion 155c″ of the bottom cover 155 is bent outward to seat the lower edge of the display unit 110, while extending obliquely downward to form an extension portion 155d on which the main board 140 is seated. can do.

That is, the main board 140 may be seated on the inner surface of the extension part 155d, while the source printed circuit board 119 may be seated on the outer surface. The top and side surfaces of the main board 140 seated on the extension 155d are covered by a rear cover (not shown), and the upper surface of the source printed circuit board 119 seated on the extension 155d and the display unit 110 ) A portion of the upper surface of the front cover 135 may be covered. However, the present invention is not limited thereto.

The bottom cover 155 from the lower portion 155a to the extended portion 155d may have an approximate “d” shape, but is not limited thereto.

As described above, in the first embodiment of the present invention, the extension part 155d of the bottom cover 155 is formed at the lower end of the display unit 150, and the circuit component such as the main board 140 is bent at the lower part 150a. ), it is characterized by being able to implement a slim design by reducing the overall thickness. That is, the extension portion 155d is formed by extending the second upper portion 155c″ of the bottom cover 155 obliquely downward, and circuit components such as the main board 140 are placed on the bottom instead of the rear surface of the display unit 150. It is possible to implement a slim design by reducing the overall thickness by placing it on the bending part 150a of the display unit 150. In addition, only a minimal structure for fixing the hinge can be left on the rear surface of the display unit 150, so that a clean and differentiated design can be implemented. can

In addition, since the bending portion 150a including the extension portion 155d at the bottom of the display unit 150 is inclined backward, it is characterized in that it is not visible at the viewing distance and viewing angle. In addition, the display device 100 according to the first embodiment of the present invention may have stand structures of various sizes and designs.

The LED connector 156 disposed on the rear surface of the bottom cover 155 can be connected to the main board 140 through the first cable 117a, and the main board 140 and the source printed circuit board 119 connect to the second cable 117a. They can be connected to each other through a cable 117b.

Meanwhile, the LED connector 156 and the first cable 117a may be embedded in the fixing plate 123, but are not limited thereto, and may be embedded in the rear cover.

The display unit 110 and the backlight unit may be modularized through the bottom cover 155 . That is, the display unit 110 may be attached to the first and second upper portions 155c' and 155c" of the bottom cover 155 through the adhesive tape 115. The present invention is a modification of the structure of the bottom cover 155. As a result, the configuration of the guide panel surrounding the edge of the display unit 110 and the backlight unit can be deleted, thereby reducing material costs and securing structural efficiency.

Meanwhile, the present invention is not limited to the liquid crystal display device, and can be applied to the organic light emitting display device as described above, which will be described in detail through the following second embodiment.

When the display unit is an organic light emitting display panel, the display element may be an organic light emitting element including an anode, an organic light emitting layer, and a cathode.

7 is a cross-sectional view of a display device according to a second exemplary embodiment of the present invention.

The display device 200 according to the second exemplary embodiment of FIG. 7 is different from the display device 100 according to the first exemplary embodiment of FIGS. 4 to 6 in that the display unit is an organic light emitting display panel. However, since other configurations are substantially the same, redundant description will be omitted. Like reference numerals are used for like components.

In FIG. 7 , for convenience of explanation, the organic light emitting pixel 218 is schematically illustrated. The organic light emitting pixel 218 may include various components such as an organic light emitting element.

Referring to FIG. 7 , the display device 200 according to the second embodiment of the present invention includes a first coating layer 220a, a first substrate 213, a first multi-buffer layer 212, a driving circuit unit 211, Consists of organic light emitting pixels 218, encapsulation 216, adhesive layer 214, second multi-buffer layer 215, second substrate 217, second coating layer 220b, and flexible circuit board 221 It can be.

The organic light emitting pixel 218 may include a first organic light emitting pixel, a second organic light emitting pixel, and a third organic light emitting pixel, but is not limited thereto.

The display device 200 according to the second embodiment of the present invention may further include a touch electrode unit, but is not limited thereto.

The display device 200 according to the second embodiment of the present invention may be configured to have a pixel area and a peripheral area configured to surround the pixel area.

The first coating film 220a is a coating film cured through a curing process after resin is applied on the first substrate 213 . The first coating layer 220a may be optically transparent to visible light wavelengths. The first coating layer 220a may be configured to perform a function of an auxiliary film supporting the first substrate 213 . However, in some cases, the first coating layer 220a may be omitted.

The first coating layer 220a may be formed to a thickness of 1 μm to 50 μm. In particular, since the thickness of the first coating layer 220a can be formed to be very thin, it has the advantage of providing additional support to the first substrate 213 of the display device 200 and at the same time improving bending performance.

The refractive index of the coating composition constituting the first coating layer 220a may have a range of 1.4 to 1.8. According to the configuration described above, the first coating film (220a) has the advantage of being able to perform additional optical compensation (eg, viewing angle compensation and luminance compensation).

The first substrate 213 may be disposed on the first coating layer 220a. The first substrate 213 may be configured to have a flexible characteristic. For example, the first substrate 213 may be made of plastic having heat resistance and chemical resistance, but is not limited thereto. For example, the first substrate 213 may be made of polyimide.

A first multi-buffer layer 212 may be disposed on the first substrate 213 . The first multi-buffer layer 212 may be formed of at least different inorganic layers. The first multi-buffer layer 212 blocks the organic light emitting pixels 218 so that impurities remaining in the first substrate 213 or moisture permeable through the first substrate 213 are not transferred to the organic light emitting pixels 218. can perform a protective function. For example, the first multi-buffer layer 212 may have a structure in which silicon oxide (SiOx) and silicon nitride (SiNx) are stacked. However, it is not limited thereto, and it is also possible to omit the first multi-buffer layer 212 .

The driving circuit unit 211 may include a plurality of gate wires, a plurality of data wires, a plurality of switching transistors, a plurality of driving transistors, and a plurality of capacitors. Each transistor may include a gate electrode formed of a gate line, a source electrode and a drain electrode formed of a data line, and may be configured to adjust an amount of current of the driving transistor in proportion to a data voltage applied to the driving transistor. In this case, the driving transistor may be connected to the organic light emitting pixel 218 in the pixel area to supply current to the organic light emitting pixel 218 .

The driving circuit unit 211 may be electrically connected to the flexible circuit board 219 connected to the pad unit of the peripheral area. The driving circuit unit 211 may be referred to as a pixel array.

The organic light emitting pixel 218 may include at least a first organic light emitting pixel, a second organic light emitting pixel, and a third organic light emitting pixel. Each organic light emitting pixel 218 may be configured to emit light of one color. For example, one organic light emitting pixel 218 may be configured to emit light of one color among red, green, blue, and white. For example, the first organic light emitting pixel may be a red pixel. The second organic light emitting pixel may be a green pixel. The third organic light emitting pixel may be a blue pixel. However, it is not limited thereto.

Each organic light emitting pixel 218 may include at least an anode, an organic light emitting layer, and a cathode. A bank may be disposed between each organic light emitting pixel 218 arranged to divide each organic light emitting pixel 218 . The anode may be patterned to correspond to each organic light emitting pixel 218, and the outside of the anode may be configured to cover the bank. The organic light emitting pixel 218 may be configured in various ways, and may include, for example, an electron transport layer (ETL), an emission layer (EML), and a hole transport layer (HTL). A capping layer may be further disposed on the cathode.

These organic light emitting pixels 218 emit light individually to display an image.

The encapsulation 216 may be disposed over the organic light emitting pixel 218 to protect the organic light emitting pixel 218 from oxygen and moisture.

The encapsulation portion 216 may be formed of an inorganic material, and may be formed of, for example, silicon nitride (SiNx), silicon oxide (SiOx), or aluminum oxide (Al 2 O 3 ).

As a material constituting the encapsulation unit 216, it is preferable to select a material having excellent step compensation capability and excellent water vapor transmission rate (WVTR). The encapsulation unit 216 may be formed of a single inorganic film structure, but is not limited thereto.

The encapsulation unit 216 forms a first inorganic film and then disposes an over-coating layer capable of compensating foreign matter thereon, and the second inorganic film disposed on the over-coating layer is sealed with the first inorganic film to prevent foreign matter from forming. It may be a structure capable of compensating for defects.

The adhesive layer 214 may be configured to bond the first substrate 213 and the second substrate 217 together. For example, the adhesive layer 214 may be configured to bond the encapsulation portion 216 disposed on the first substrate 213 and the touch electrode portion disposed below the second substrate 217 .

The touch electrode unit may be implemented in a mutual-capacitance type or a self-capacitance type. In addition, the touch electrode unit may be implemented in various ways such as a resistive type or an electromagnetic type.

The second multi-buffer layer 215 may be disposed on the touch electrode part. The second multi-buffer layer 215 may be formed of at least different inorganic layers. The second multi-buffer layer 215 blocks the organic light emitting pixels 218 so that impurities remaining in the second substrate 217 or moisture permeable through the second substrate 217 are not transferred to the organic light emitting pixels 218. perform a protective function. For example, the second multi-buffer layer 215 may have a structure in which silicon oxide (SiOx) and silicon nitride (SiNx) are stacked. For example, the multi-buffer layer 212 may have a structure in which silicon oxide and silicon nitride are alternately stacked four times, but is not limited thereto. However, it is also possible to omit the second multi-buffer layer 215.

The second substrate 217 may be disposed on the second multi-buffer layer 215 .

The second substrate 217 may be configured to have a flexible characteristic. For example, the second substrate 217 may be made of plastic having heat resistance and chemical resistance, but is not limited thereto. For example, the second substrate 217 may be made of polyimide.

The second coating film 220b is a coating film cured through a curing process after resin is applied on the second substrate 217 . The second coating layer 220b may be optically transparent to visible light wavelengths. The second coating layer 220b may be configured to perform a function of an auxiliary film supporting the second substrate 217 . However, in some cases, the second coating layer 220b may be omitted.

The refractive index of the coating composition constituting the second coating layer 220b may have a range of 1.4 to 1.8. According to the configuration described above, the second coating film (220b) has the advantage of being able to perform additional optical compensation (eg, viewing angle compensation and luminance compensation).

The first coating layer 220a and the second coating layer 220b may be formed of the same coating composition as each other. When the first coating layer 220a and the second coating layer 220b are composed of the same coating composition, there is an advantage in that the yield can be improved and the manufacturing cost can be reduced by simplifying the manufacturing process and uniformity of materials. However, the present invention is not limited thereto, and the first coating layer 220a and the second coating layer 220b may be formed of different coating compositions. For example, when the display device 200 is a top emission type display device that displays an image in the direction of the second coating layer 220b, the visible light transmittance of the second coating layer 220b is the same as that of the first coating layer 220a. It is configured to be higher than the transmittance and the refractive index of the second coating layer 220b may be configured to be higher than the refractive index of the first coating layer 220a. In the case of the above configuration, there is an advantage in that the quality of the image of the display device 200 can be further improved.

The first coating layer 220a and the second coating layer 220b may be formed to have the same thickness as each other. The thickness described here may mean an average thickness because uniformity may vary depending on the coating state of the coating film.

When the first coating layer 220a and the second coating layer 220b are configured to have the same thickness as each other, since manufacturing process conditions are simplified, the yield can be improved. However, the present invention is not limited thereto, and the thicknesses of the first coating layer 220a and the second coating layer 220b may be different from each other. For example, the thickness of the first coating layer 220a may be formed to be thicker than the thickness of the second coating layer 220b. Alternatively, the thickness of the first coating layer 220a may be formed thinner than the thickness of the second coating layer 220b. According to the configuration described above, there is an advantage in that the position of the neutral plane of the display device 200 can be adjusted by adjusting only the thickness of the first and second coating films 220a and 220b. At this time, the neutral plane is, for example, when the display device 200 is bent, tensile stress is generated on one side of the neutral plane and compressive stress is generated on the other side. So, there is a non-stretchable surface in the middle, which is defined as a neutral surface. No bending stress occurs at the neutral plane.

Referring back to FIG. 7 , an area where the first substrate 213 and the second substrate 217 overlap may be defined as a pixel area. Also, a partial area of the first substrate 213 protruding from the second substrate 217 without overlapping with the second substrate 217 may be a peripheral area including a pad portion. A flexible circuit board 221 and a data driver (not shown) may be disposed in a peripheral area (eg, a pad part) of the first substrate 213 . The flexible circuit board 221 and the data driver are bonded together by a conductive adhesive layer and may be electrically conductive. The conductive adhesive layer may be, for example, an adhesive layer (eg, anisotropic conductive film; ACF) including conductive balls, but is not limited thereto.

The first coating layer 220a may be applied to cover portions of the rear surface of the first substrate 213 and the flexible circuit board 221 . According to the configuration described above, the first coating layer 220a may simultaneously support the rear surface of the first substrate 213 and the flexible circuit board 221 . According to the configuration described above, since the conductive adhesive layer bonding the flexible circuit board 221 and the first substrate 213 can be sealed so as not to be exposed to the outside, there is an advantage in that the pad portion can be protected from corrosion due to exposure. .

In addition, the second coating layer 220b may be applied to partially cover upper surfaces of the second substrate 217 , the flexible circuit board 221 , and the data driver. According to the configuration described above, the second coating layer 220b may simultaneously support the upper surface of the second substrate 217, the flexible circuit board 221, and the data driver. Accordingly, since the second coating layer 220b can structurally provide an additional supporting force to the flexible circuit board 221 and the data driver, the flexible circuit board 221 and the data driver further adhere to the first substrate 213. It has the advantage of being able to remain firmly attached. In addition, since the conductive adhesive layer bonding the flexible circuit board 221 and the first substrate 213 and the conductive adhesive layer bonding the data driver and the first substrate 213 can be simultaneously sealed so as not to be exposed to the outside, the pad portion It has the advantage of being able to protect against corrosion due to exposure.

In addition, since the first coating layer 220a and the second coating layer 220b can simultaneously support the upper and lower surfaces of the flexible circuit board 221, the flexible circuit board 221 can be supported more effectively.

The display device 200 according to the second embodiment of the present invention configured as described above is housed in and protected by the bottom cover 255, that is, the bottom cover 255 includes the first coating layer 220a and the second coating layer 220b. It covers the side surface and the rear surface of the first coating film 220a, and from the lowest layer, the first coating film 220a, the first substrate 213, the first multi-buffer layer 212, the driving circuit unit 211, the organic light emitting pixel 218 , The sealing portion 216, the adhesive layer 214, the second multi-buffer layer 215, the second substrate 217 and the second coating film (220b) may be laminated and stored therein.

As in the above-described first embodiment of the present invention, the bottom cover 255 according to the second embodiment of the present invention has a square frame shape, and the lower portion 255a and the side portion vertically bent from the lower portion 255a ( 255b) may be included. The side portion 255b may be configured to be vertically bent at four corners of the lower portion 255a, but is not limited thereto.

And, the bottom cover 255 according to the second embodiment of the present invention may further include an upper part 255c bent outwardly from the side part 255b to seat the flexible circuit board 221 thereon.

The upper part 255c of the bottom cover 155 is bent outwardly at the lower side part 255b to seat the flexible circuit board 221, while the extension part 255d is inclined downward and on which the main board 240 is seated. ) can be configured.

That is, the main board 240 may be seated on the inner surface of the extension part 255d, while the printed circuit board 219 may be seated on the outer surface. The top and side surfaces of the main board 240 seated on the extension portion 255d are covered by a rear cover (not shown), and a portion of the upper surface of the printed circuit board 219 seated on the extension portion 255d is covered by a front cover ( 235) can be covered. However, the present invention is not limited thereto.

The bottom cover 255 may have an approximate "d" shape from the lower portion 255a to the extension portion 255d, but is not limited thereto.

As described above, in the second embodiment of the present invention, the extension 255d of the bottom cover 255 is formed at the bottom of the display unit, and circuit components such as the main board 240 are placed in the bent portion at the bottom to reduce the overall thickness. It is characterized in that it can be reduced to implement a slim design.

A display device according to embodiments of the present invention can be described as follows.

A display device according to an embodiment of the present invention includes a display unit for displaying an image and a bottom cover covering a rear surface of the display unit, and a lower end of the bottom cover obliquely extends to the rear of the display unit so that a main board is seated thereon. wealth can be made.

According to another feature of the present invention, a stand part installed under the display part to support the display part is further included, wherein the stand part is integrally formed with a fixing plate coupled to the rear surface of the bottom cover and the fixing plate to It may include a tilt control unit for adjusting the angle (tilt) of the display unit, a support unit coupled to the tilt control unit to support the display unit, and a support plate provided on a bottom surface of the support unit to support a load of the display unit.

According to another feature of the present invention, the display unit may include upper and lower substrates and a liquid crystal layer interposed between the upper and lower substrates.

According to another feature of the present invention, the display device further includes a backlight unit disposed behind the display unit and supplying light to the display unit, wherein the bottom cover surrounds a rear surface and a side surface of the display unit, and The backlight unit may be accommodated inside.

According to another feature of the present invention, the bottom cover may include a lower part, a side part bent vertically from the lower part, and an upper part bent inward or outward from the side part to seat the rear edge of the display unit. there is.

According to another feature of the present invention, the upper portion of the bottom cover is bent inward at upper, left, and right sides, and is bent outward at first upper and lower sides for seating the upper, left, and right edges of the display unit. A second upper portion for seating a lower edge of the display unit may be included.

According to another feature of the present invention, the second upper portion may face one end of the non-display area of the display unit to which the flexible film is connected, and the first upper portion may face the other end of the non-display area.

According to another feature of the present invention, the first upper part and the lower part are configured to face each other with the side part interposed therebetween, so that the upper, left, and right sides of the bottom cover may have a "c" shape.

According to another feature of the present invention, the second upper part may be bent outward to seat the lower edge of the display unit, while extending obliquely downward to configure the extension part on which the main board is seated.

According to another feature of the present invention, the main board may be seated on an inner surface of the extension part, and the printed circuit board may be seated on an outer surface of the extension part.

According to another feature of the present invention, the top and side surfaces of the main board may be covered by a rear cover, and the top surface of the printed circuit board and a portion of the top surface of the display unit may be covered by the front cover.

According to another feature of the present invention, from the lower portion of the bottom cover to the extension portion may have a "L" shape.

According to another feature of the present invention, the display device further includes an LED printed circuit board on which an LED package is mounted and an LED connector disposed on a rear surface of the bottom cover, and the LED printed circuit board extends to the rear of the display unit. It is possible to mount the LED connector.

According to another feature of the present invention, the LED connector may be connected to the main board through a first cable, and the main board and the printed circuit board may be connected to each other through a second cable.

According to another feature of the present invention, the display unit may include a display element including an anode, an organic light emitting layer, and a cathode.

According to another feature of the present invention, the bottom cover may include a lower portion, a side portion vertically bent from the lower portion, and an upper portion bent outwardly from the side portion to seat the flexible circuit board.

According to another feature of the present invention, the upper portion of the bottom cover may extend obliquely downward to configure the extension portion on which the main board is seated.

According to another feature of the present invention, it is possible to go.

According to another feature of the present invention, the main board may be seated on an inner surface of the extension part, and the printed circuit board may be seated on an outer surface of the extension part.

According to another feature of the present invention, the top and side surfaces of the main board may be covered by a rear cover, and the top surface of the printed circuit board and a portion of the top surface of the display unit may be covered by the front cover.

Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and may be variously modified and implemented without departing from the technical spirit of the present invention. . Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100, 200: display device
110: display unit
119, 219: printed circuit board
120: stand unit
121: support
122: support plate
123: fixed plate
124: tilt control unit
140, 240: main board
150: display unit
155, 255: bottom cover
155a, 255a: lower part
155b, 255b: side
155c', 155c", 255c: top
155d, 255d: extension

Claims (19)

a display unit for displaying an image; and
And a bottom cover covering the rear surface of the display unit,
A lower end of the bottom cover obliquely extends toward the rear of the display unit and constitutes an extension portion on which a main board is seated. According to claim 1,
Further comprising a stand installed below the display unit to support the display unit,
The stand part,
a fixing plate coupled to the rear surface of the bottom cover;
a tilt control unit integrally formed with the fixing plate to adjust an angle (tilt) of the display unit;
a support unit coupled to the tilt control unit to support the display unit; and
and a support plate provided on a bottom surface of the support unit to support a load of the display unit. According to claim 1,
the display unit,
upper and lower substrates; and
A display device comprising a liquid crystal layer interposed between the upper and lower substrates. According to claim 3,
Further comprising a backlight unit disposed behind the display unit to supply light to the display unit,
The bottom cover surrounds a rear surface and a side surface of the display unit and accommodates the display unit and the backlight unit therein. According to claim 3,
The bottom cover,
bottom;
a side portion bent vertically from the lower portion; and
and an upper portion bent inwardly or outwardly from the side portion to seat a rear edge of the display unit. According to claim 5,
The top of the bottom cover,
a first upper portion that is bent inward from upper, left, and right sides to seat the upper, left, and right edges of the display unit; and
and a second upper portion bent outward from a lower side portion to seat a lower edge of the display unit. According to claim 6,
The second upper part faces one end of the non-display area of the display unit to which the flexible film is connected, and the first upper part faces the other end of the non-display area. According to claim 6,
The first upper part and the lower part are configured to face each other with the side part interposed therebetween, and the upper, left, and right sides of the bottom cover have a “c” shape. According to claim 6,
The second upper portion is bent outward to seat the lower edge of the display unit, and extends obliquely downward to configure the extension portion on which the main board is seated. According to claim 9,
The display device of claim 1 , wherein the main board is seated on an inner surface of the extension part, and the printed circuit board is seated on an outer surface of the extension part. According to claim 10,
The display device of claim 1 , wherein upper and side surfaces of the main board are covered with a rear cover, and a top surface of the printed circuit board and a portion of an upper surface of the display unit are covered with a front cover. According to claim 9,
A display device having a "L" shape from the bottom of the bottom cover to the extension part. According to claim 10,
LED printed circuit board mounting the LED package; and
Further comprising an LED connector disposed on the rear surface of the bottom cover,
The LED printed circuit board extends to the rear of the display unit to mount the LED connector. According to claim 13,
The LED connector is connected to the main board through a first cable, and the main board and the printed circuit board are connected to each other through a second cable. According to claim 1,
The display unit is configured to include a display element including an anode, an organic light emitting layer, and a cathode. According to claim 15,
The bottom cover,
bottom;
a side portion bent vertically from the lower portion; and
A display device comprising an upper portion bent outward from the side portion to seat the flexible circuit board thereon. 17. The method of claim 16,
An upper portion of the bottom cover extends obliquely downward to constitute the extension portion on which the main board is seated. 18. The method of claim 17,
The display device of claim 1 , wherein the main board is seated on an inner surface of the extension part, and the printed circuit board is seated on an outer surface of the extension part. According to claim 18,
The display device of claim 1 , wherein upper and side surfaces of the main board are covered with a rear cover, and a top surface of the printed circuit board and a portion of an upper surface of the display unit are covered with a front cover.

Images