KR102159949B1 - Curved display device - Google Patents

Abstract

In the curved display device of the present invention, the front of the guide panel on which the display panel is mounted is curved according to the curvature of the curved display panel, and the rear surface on which the backlight unit is located is maintained. A curved display panel in which the screen is concavely bent, for implementing a curved display device regardless of the structure of the light source as well as the flat backlight unit and suppressing deformation of mechanical structures due to stress; A backlight unit positioned on a rear surface of the curved display panel to supply backlight light to the curved display panel; A guide panel in the shape of a frame positioned between the curved display panel and the backlight unit and on which the curved display panel is mounted; And a cover bottom positioned on a rear surface of the backlight unit to couple the curved display panel to the guide panel and the backlight unit, wherein a front surface of the guide panel on which the curved display panel is seated is a curvature of the curved display panel Accordingly, a curved surface is implemented and the rear surface on which the backlight unit is located maintains a flat surface.

Description

Curved display device {CURVED DISPLAY DEVICE}

The present invention relates to a curved display device, and more particularly, to a curved display device capable of increasing a viewer's immersion feeling by manufacturing a display panel in a curved shape.

Recently, the screen size of a liquid crystal display device used as a display device of a television receiver is accelerating.

However, as the screen becomes larger, there is a problem that the visual difference increases when the viewer sees the center of the screen and the left and right ends of the screen.

In addition, a problem with the screen of a large-sized television liquid crystal display device is an increase in screen glare. This visual difference problem is improved by concavely bending the screen.

1 is a perspective view schematically illustrating a general curved display device.

Referring to FIG. 1, a general curved display device 10 includes a display panel (ie, a concave curved display panel) 1 and a curved backlight unit (not shown) in which the screen is curved concavely. And, when observed from the XY plane, it is bent concave with a constant curvature.

As described above, in the case of the general curved display device 10, not only the display panel 1 but also the backlight unit forms a curved structure in order to implement a constant curvature.

However, there are many obstacles to implementing the mechanical structures of the backlight unit in a curved shape. In addition, in the case of the general curved display device 10, there is a limitation that the light source structure can be applied only in a vertical type.

That is, it is difficult to maintain the curved shape of each of the mechanical structures, and in order to maintain the curved surface of these mechanical structures in various environments, many components such as a number of screws and reinforcing bars are required in response to a lot of stress. In addition, for this reason, as time elapses, the rigidity of the mechanical structures weakens, making it more difficult to maintain the curved surface.

An object of the present invention is to solve the above problems, and to provide a curved display device to which a flat backlight unit can be applied.

In addition, other objects and features of the present invention will be described in the configuration and claims of the invention to be described later.

In order to achieve the above object, a curved display device according to an embodiment of the present invention includes: a curved display panel in which a screen is concavely curved; A backlight unit positioned on a rear surface of the curved display panel to supply backlight light to the curved display panel; A guide panel in the shape of a frame positioned between the curved display panel and the backlight unit and on which the curved display panel is mounted; And a cover bottom positioned on a rear surface of the backlight unit to couple the curved display panel to the guide panel and the backlight unit, wherein a front surface of the guide panel on which the curved display panel is seated is a curvature of the curved display panel Accordingly, while implementing a curved surface, the rear surface on which the backlight unit is located may maintain a flat surface.

In this case, the curved display panel may be of a flexible type or a rigid type.

The curved display panel may be a liquid crystal display panel, a plasma display panel, or an organic light emitting display panel.

In this case, when the curved display panel is configured as a liquid crystal display panel, a fixing means attached to at least one edge of the rear surface of the array substrate of the curved display panel may be additionally included.

In this case, the guide panel may include a seating portion in which a portion corresponding to the fixing means is cut and the fixing means is inserted.

At this time, the fixing means is coupled to the upper portion of the guide panel through the fixing means by using a "b"-shaped clasp while the fixing means is seated on the seating part of the guide panel, while the guide panel Can be coupled to the bottom of the.

When the curved display panel is configured as a liquid crystal display panel, the curved display panel may be fastened to the guide panel through an attachment means.

In this case, the attachment means may be attached to at least one edge of the rear surface of the array substrate of the curved display panel.

The guide panel may have a predetermined stepped edge at the front edge so that the curved display panel can be inserted and seated.

In this case, it may further include an adhesive means interposed between the curved display panel and the guide panel.

The backlight unit is installed behind the curved display panel and includes a lamp assembly including a plurality of lamps; A reflector installed on the rear surface of the lamp assembly; And a plurality of optical sheets installed between the lamp assembly and the curved display panel.

The backlight unit is installed on at least one side of the curved display panel, the lamp assembly including a plurality of lamps; A light guide plate and a reflecting plate sequentially installed on the rear surface of the lamp assembly; And a plurality of optical sheets installed between the lamp assembly and the curved display panel.

The backlight unit and the cover bottom may have a flat structure in which front and rear surfaces are flat.

A light leakage preventing member formed on a side surface of the curved display panel may additionally be included.

In this case, the light leakage preventing member may be formed by curing a black sealant of black resin by ultraviolet (UV) light.

As described above, in the curved display device according to the exemplary embodiment of the present invention, the front of the guide panel on which the display panel is mounted is curved according to the curvature of the curved display panel, and at the same time, the backlight unit is located. By maintaining a flat surface, a curved display device is realized regardless of the structure of the light source as well as the conventional flat backlight unit, while providing an effect of suppressing deformation of mechanical structures due to stress.

1 is a perspective view schematically illustrating a general curved display device.
2 is a schematic perspective view of a curved display device according to a first embodiment of the present invention.
3 is an exploded cross-sectional view schematically showing the structure of the curved display device according to the first embodiment of the present invention shown in FIG. 2.
4 is an exploded perspective view schematically showing the structure of the curved display device according to the first embodiment of the present invention shown in FIG. 2.
5A and 5B are cross-sectional views showing an enlarged portion A in the curved display device according to the first embodiment of the present invention shown in FIG. 2.
6 is an exploded cross-sectional view schematically showing the structure of a curved display device according to a second embodiment of the present invention.
7 is an exploded perspective view schematically showing the structure of a curved display device according to a second embodiment of the present invention.
FIG. 8 is a cross-sectional view showing an enlarged portion B in the curved display device according to the second exemplary embodiment shown in FIG. 7.
9 is an exploded cross-sectional view schematically showing the structure of a curved display device according to a third embodiment of the present invention.
10 is an exploded perspective view schematically showing the structure of a curved display device according to a third embodiment of the present invention.

Hereinafter, preferred embodiments of the curved display device according to the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together 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, only these embodiments make the disclosure of the present invention complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity of description.

When an element or layer is another element or referred to as “on” or “on”, it includes both the case where another layer or other element is interposed in the middle as well as directly above the other element or layer. do. On the other hand, when a device is referred to as "directly on" or "directly on", it indicates that there is no intervening other device or layer in between.

The terms "below, beneath", "lower", "above", "upper", which are spatially relative terms, refer to one element or component as shown in the drawing. It can be used to easily describe the correlation between the and other devices or components. Spatially relative terms should be understood as terms including different directions of the device during use or operation in addition to the directions shown in the drawings. For example, if an element shown in the figure is turned over, an element described as “below” or “beneath” of another element may be placed “above” another element. Accordingly, the exemplary term “below” may include both directions below and above.

The terms used in the present specification are for describing exemplary embodiments, and therefore, are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, "comprise" and/or "comprising" refers to the presence of one or more other components, steps, actions and/or elements, and/or elements, steps, actions and/or elements mentioned. Or does not exclude additions.

2 is a perspective view schematically illustrating a curved display device according to a first embodiment of the present invention.

3 is an exploded cross-sectional view schematically showing the structure of the curved display device according to the first embodiment of the present invention shown in FIG. 2, and FIG. 4 is a first embodiment of the present invention shown in FIG. Is an exploded perspective view schematically showing the structure of a curved display device according to FIG.

Referring to the drawings, the curved display device 100 according to the first embodiment of the present invention includes a display panel (ie, a concave curved display panel) 110 in which a screen is bent concavely, and the curved display panel. (110) It includes a backlight unit positioned at the rear and supplies backlight light to the curved display panel 110, and has a constant curvature when the screen of the curved display panel 110 is viewed from the XY plane. Is bent.

That is, the curved display panel 110 may have a curved shape with a constant curvature when viewed from the XY plane.

The curved display panel 110 may be of either a flexible type or a rigid type, and may have a curved shape by various manufacturing methods. For example, after disposing a flat display panel between a first curved mold having a concave shape and a second curved mold having a convex shape facing the first curved mold, a curved shape is performed through heat treatment and press treatment. A display panel having a can be manufactured.

The curved display panel 110 may be a liquid crystal display panel, a plasma display panel, an organic light emitting display panel, or the like. As an example, the curved display panel 110 may be a liquid crystal display panel including an array substrate, a color filter substrate facing the array substrate, and a liquid crystal layer interposed between the array substrate and the color filter substrate.

When the curved display panel 110 is configured as a liquid crystal display panel, the size of the color filter substrate may be designed to be smaller than the size of the array substrate. Accordingly, an area not covered by the color filter substrate is exposed. In the exposed area, a pad portion in which the gate driver and the data driver are located may be formed.

At this time, although not shown, the color filter substrate distinguishes between a color filter composed of a plurality of sub-color filters implementing colors of red, green, and blue, and the sub-color filter. It consists of a black matrix that blocks light passing through the liquid crystal layer, and a transparent common electrode that applies a voltage to the liquid crystal layer.

In addition, the array substrate includes a plurality of gate lines and data lines that are arranged vertically and horizontally to define a plurality of pixel regions, a thin film transistor that is a switching element formed in an intersection region of the gate line and the data line, and a pixel electrode formed on the pixel region. consist of. In this case, in the case of an in-plane switching (IPS) type liquid crystal display, a common electrode is formed on the array substrate instead of the color filter substrate.

The curved display panel 110 may further include a first polarizing film disposed below the array substrate and a second polarizing film disposed above the color filter substrate. The first polarizing film includes a transmission axis in a first direction, and polarizes light in a first direction. The second polarizing film includes a transmission axis in a second direction, and polarizes light in a second direction. For example, the transmission axes of the first polarizing film may be disposed perpendicular to each other.

In this way, a common electrode and a pixel electrode are formed on the liquid crystal display panel to which the color filter substrate and the array substrate are bonded to apply an electric field to the liquid crystal layer, and data applied to the pixel electrode while a voltage is applied to the common electrode When the voltage of the signal is controlled, the liquid crystal of the liquid crystal layer is rotated by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode, so that light is transmitted or blocked for each pixel to display characters or images.

Further, in order to control the voltage of the data signal applied to the pixel electrode for each pixel, a switching device such as a thin film transistor is individually provided in the pixels.

Further, the gate driver and the data driver are coupled to the liquid crystal display panel in various forms to supply scan signals and image information to gate lines and data lines formed on the liquid crystal display panel, thereby driving pixels of the liquid crystal display panel.

Meanwhile, when the curved display panel 110 is configured as an organic light emitting display panel, the organic light emitting display panel includes a TFT substrate in which an active region and a pad region are defined, and an encapsulation layer formed on the TFT substrate while covering the active region. Includes.

A polyimide substrate may be applied as the TFT substrate, and in this case, a back film made of polyethylene terephthalate (PET) may be attached to the rear surface of the TFT substrate through the first adhesive layer. However, the present invention is not limited thereto, and a metal plate that is easy to prevent moisture permeation may be used instead of the PET back film.

A multi-layered barrier layer may be formed on the TFT substrate to prevent moisture permeation from the rear surface of the TFT substrate, but the present invention is not limited thereto.

In addition, a polarizing plate for preventing reflection of light incident from the outside is attached on the encapsulation layer through the second adhesive layer.

In this case, pixels are arranged in a matrix form in the active region of the TFT substrate, and driving elements such as a scan driver and a data driver for driving the pixels and other components are located outside the active region.

Pad electrodes for transmitting electric signals to the scan driver and data driver are positioned in the pad area of the TFT substrate.

The encapsulation layer is formed on the organic light emitting diodes and driving circuits formed on the TFT substrate to seal and protect the organic light emitting diodes and driving circuits from the outside.

As described above, when the curved display panel 110 is configured as a liquid crystal display panel, a backlight unit that supplies backlight light to the curved display panel 110 is disposed behind the curved display panel 110 Can be.

The present invention is not limited to a direct-down method or an edge method according to a method of arranging a light-emitting lamp, but when a direct-type backlight unit is specifically described as an example, a plurality of lamps (not shown) behind the curved display panel 110 ) Is installed, and a reflector (not shown) is installed on the rear surface of the lamp assembly 130.

At this time, although not shown in detail, the lamp assembly 130 may include a printed circuit board on which the plurality of lamps are mounted, and the printed circuit board includes a signal line for supplying a driving voltage to the plurality of lamps. Can be formed.

In addition, a plurality of optical sheets (not shown) may be disposed between the lamp assembly 130 and the curved display panel 110 to reduce loss of light and improve uniformity.

In this case, the lamp is a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), a hot cathode fluorescent lamp (HCFL), and a light emitting diode (Light Cathode Fluorescent Lamp) as light sources. Various light sources such as Emitting Diode (LED) can be used.

In addition, the optical sheet includes a diffusion sheet and a prism sheet, and a protective sheet may be added.

The diffusion sheet disperses light incident from the lamp, thereby preventing the occurrence of spots in the image displayed on the curved display panel 110 due to the partial concentration of the light.

In addition, the prism sheet collects light incident from the diffusion sheet so that it is uniformly distributed over the entire surface of the curved display panel 110.

Moreover, the protective sheet protects the optical sheet sensitive to dust or scratches, prevents the flow of the optical sheet when carrying the backlight unit, and has a function of diffusing the light incident from the prism sheet, so that the light is more uniform. Can be distributed.

Above the backlight unit configured as described above, a curved display panel 110 including the color filter substrate and an array substrate is mounted through the frame-shaped guide panel 120, as described above, and the curved display panel 110 The guide panel 120 and the backlight unit are coupled to each other by the cover bottom 140 at the bottom through a plurality of fastening means to form the curved display device 100.

In this case, the front surface 120a of the guide panel 120 on which the curved display panel 110 is mounted is a curved surface according to the curvature of the curved display panel 110 and the rear surface on which the backlight unit is located. By maintaining the plane 120b, the existing flat structure can be applied to both the backlight unit and the cover bottom 140. Accordingly, it is possible to implement the curved display device 100 regardless of the structure of the light source, while suppressing deformation of mechanical structures due to stress.

That is, in the conventional curved display device, there was a limitation in implementing the shape of the backlight unit, but in the case of the present invention, the backlight unit has the same flat structure and the guide panel 120 on which the curved display panel 110 is mounted. Only the front portion 120a implements a curved shape.

In this case, as the mechanical structures that were limited in maintaining the curved surface are constructed in a plane, it is possible to implement such that there is no deformation in various environments by reducing the stress applied to each of the mechanical structures. In addition, the light source structure was also limited only to the vertical structure, but in the case of the present invention, it can be applied to various structures such as horizontal and direct.

Meanwhile, according to the present invention, additional fastening is performed between the curved display panel 110 and the guide panel 120 in order to maintain the curved surface of the curved display panel 110 in various environments. That is, when the curved display panel 110 is seated on the front surface 120a of the guide panel 120, it is fastened to the guide panel 120 through a fixing means attached to the curved display panel 110. Alternatively, it may be fastened to the guide panel 120 through an attachment means such as double-sided tape, which will be described in detail with reference to the drawings.

5A and 5B are cross-sectional views showing an enlarged portion A in the curved display device according to the first embodiment of the present invention illustrated in FIG. 2.

In this case, FIG. 5A shows an example of fastening to the guide panel through a fixing means attached to the curved display panel, and FIG. 5B shows an example of fastening to the guide panel through a double-sided tape. .

Referring to the drawings, the curved display panel 110 according to the first embodiment of the present invention faces each other to maintain a uniform cell gap. The color filter substrate 101, the array substrate 111, and the color filter are bonded together. It is composed of a liquid crystal layer (not shown) formed in a cell gap between the substrate 101 and the array substrate 111.

In this case, in the curved display device according to the first embodiment of the present invention, the thickness of the curved display device can be reduced by removing the existing case top covering the edge of the curved display panel 110, and the bezel of the curved display device There is an advantage in that the width can be reduced and a step difference in the front surface of the curved display device can be removed.

At this time, by removing the case top, light emitted from the backlight unit may leak out to the side of the curved display panel 110 through total reflection. Therefore, in the present invention, the light emitted from the side of the curved display panel 110 may be generated. A light leakage preventing member 115 is additionally formed on the side surface of the curved display panel 110 to block possible light leakage and close the side surface. That is, the light leakage preventing member 115 is formed on the side surfaces of the color filter substrate 101 and the array substrate 111.

In this case, although not shown, the light leakage preventing member 115 may extend to the upper surface of the color filter substrate 101, and is formed to contact the second polarizing film formed on the color filter substrate 101. 2 It can also play a role of preventing peeling of the polarizing film. In addition, the light leakage preventing member 115 may extend to the lower surface of the array substrate 111.

The curved display panel 110 is generally in a rectangular shape, and accordingly, the light leakage preventing member 115 may be formed on all four sides of the curved display panel 110, but the driving unit (not shown) When a flexible printed circuit film is used, the light leakage preventing member 115 may be formed only on three sides of the curved display panel 110.

The light leakage preventing member 115 may be formed by curing a black sealant of black resin with ultraviolet (UV) light. In order to enhance the light leakage preventing effect of the light leakage preventing member 115, the black sealant Just increase the black level.

In this case, as shown in FIG. 5A, a predetermined fixing means 116 may be attached to at least one side, preferably both sides of the rear surface of the array substrate 111 of the curved display panel 110.

The fixing means 116 may have a rectangular shape, but the present invention is not limited thereto.

At this time, the guide panel 120 ′ is provided with a seating portion 122 in which a portion corresponding to the fixing means 116 is cut and the fixing means 116 is fitted thereto.

In this way, after the fixing means 116 is seated on the mounting portion 122 of the guide panel 120 ′, the fixing means 116 is passed through the fixing means 116 using a latch 121 in the shape of a “L”. While being coupled to the upper portion of the guide panel 120 ′, it is coupled to the lower portion of the guide panel 120 ′ through a screw 125. In this case, the guide panel 120 ′ may be divided into an upper portion in which the seating portion 122 is formed and a lower portion in which the screw 125 is fastened.

Alternatively, as shown in FIG. 5B, the curved display panel 110 may be fastened to the guide panel 120" through an attaching means 150 such as a double-sided tape.

In this case, the attaching means 150 may be attached to at least one side of the rear surface of the array substrate 111 of the curved display panel 110, preferably at the three side edges of the curved display panel 110 except for a portion where the driving unit is located.

Meanwhile, the guide panel of the present invention may have a predetermined stepped edge at the front edge so that the curved display panel can be inserted and seated, and this will be described in detail through the second embodiment of the present invention.

6 is an exploded cross-sectional view schematically showing the structure of a curved display device according to a second embodiment of the present invention, and FIG. 7 is an exploded perspective view schematically showing the structure of a curved display device according to the second embodiment of the present invention. to be.

In addition, FIG. 8 is a cross-sectional view showing an enlarged portion B in the curved display device according to the second embodiment of the present invention shown in FIG. 7.

Referring to the drawings, a curved display device according to a second exemplary embodiment of the present invention includes a display panel (ie, a concave curved display panel) 210 and the curved display panel 210 in which a screen is curved concavely. A backlight unit positioned at the rear and supplying backlight light to the curved display panel 210 is included, and the screen of the curved display panel 210 is bent concavely with a constant curvature when viewed from the XY plane.

As described above, the curved display panel 210 may be of either a flexible type or a rigid type, and may have a curved shape by various manufacturing methods. For example, after disposing a flat display panel between a first curved mold having a concave shape and a second curved mold having a convex shape facing the first curved mold, a display having a curved shape through heat treatment and press treatment Panels can be manufactured.

Also, the curved display panel 210 may be a liquid crystal display panel, a plasma display panel, an organic light emitting display panel, or the like. For example, the curved display panel 210 includes an array substrate 211, a color filter substrate 201 facing the array substrate 211, and the array substrate 211 and the color filter substrate 201. It may be a liquid crystal display panel including a liquid crystal layer (not shown).

When the curved display panel 210 is configured as a liquid crystal display panel, the size of the color filter substrate 201 may be designed to be smaller than the size of the array substrate 211. Accordingly, an area not covered by the color filter substrate 201 is exposed. In the exposed area, a pad portion in which the gate driver and the data driver are located may be formed.

At this time, although not shown, the color filter substrate 201 distinguishes between a color filter composed of a plurality of sub-color filters implementing colors of red, green, and blue, and the sub-color filter, and transmits light passing through the liquid crystal layer. It consists of a black matrix to block and a transparent common electrode that applies a voltage to the liquid crystal layer.

In addition, the array substrate 211 is arranged vertically and horizontally to define a plurality of pixel regions, a plurality of gate lines and data lines, a thin film transistor that is a switching element formed in an intersection region between the gate line and the data line, and a thin film transistor formed on the pixel region. It consists of a pixel electrode.

In addition, the curved display panel 210 may further include a first polarizing film disposed below the array substrate 211 and a second polarizing film disposed above the color filter substrate 201. The first polarizing film includes a transmission axis in a first direction, and polarizes light in a first direction. The second polarizing film includes a transmission axis in a second direction, and polarizes light in a second direction. For example, the transmission axes of the first polarizing film may be disposed perpendicular to each other.

In the liquid crystal display panel in which the color filter substrate 201 and the array substrate 211 are bonded together, a common electrode and a pixel electrode are formed to apply an electric field to the liquid crystal layer, and the voltage is applied to the common electrode. When the voltage of the data signal applied to the pixel electrode is controlled, the liquid crystal of the liquid crystal layer is rotated by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode, so that light is transmitted or blocked for each pixel. Will be displayed.

Further, in order to control the voltage of the data signal applied to the pixel electrode for each pixel, a switching device such as a thin film transistor is individually provided in the pixels.

Further, the gate driver and the data driver are coupled to the liquid crystal display panel in various forms to supply scan signals and image information to gate lines and data lines formed on the liquid crystal display panel, thereby driving pixels of the liquid crystal display panel.

At this time, the curved display device according to the second embodiment of the present invention removes the existing case top covering the edge of the curved display panel 210 as in the first embodiment of the present invention. The thickness can be reduced, the width of the bezel of the curved display can be reduced, and a step difference in the front of the curved display can be removed.

In this case, in the present invention, a light leakage prevention member 215 is additionally formed on the side surface of the curved display panel 210 to block light leakage that may occur from the side surface of the curved display panel 210 and close the side surface. It features. That is, the light leakage preventing member 215 is formed on the side surfaces of the color filter substrate 201 and the array substrate 211.

At this time, although not shown, the light leakage preventing member 215 may extend to the upper surface of the color filter substrate 201, and is formed to contact the second polarizing film formed on the color filter substrate 201. 2 It can also play a role of preventing peeling of the polarizing film. In addition, the light leakage preventing member 215 may extend to the lower surface of the array substrate 211.

The curved display panel 210 generally has a rectangular shape, and accordingly, the light leakage preventing member 215 may be formed on all four sides of the curved display panel 210, but the driving unit (not shown) When a flexible printed circuit film is used, the light leakage preventing member 215 may be formed only on three sides of the curved display panel 210.

The light leakage preventing member 215 may be formed by curing the black sealant of black resin with ultraviolet rays. In order to improve the light leakage preventing effect of the light leakage preventing member 215, the degree of black of the black sealant may be increased.

When the curved display panel 210 is configured as a liquid crystal display panel, a backlight unit supplying backlight light to the curved display panel 210 is disposed behind the curved display panel 210 configured as described above. I can.

As described above, the present invention is not limited to a direct-down method or an edge method according to a method of arranging a light emitting lamp. As an example, when a direct-type backlight unit is described in detail, a plurality of the rear of the curved display panel 210 A lamp assembly 230 made of a lamp (not shown) is installed, and a reflector (not shown) is installed on the rear surface of the lamp assembly 230.

At this time, although not shown in detail, the lamp assembly 230 may include a printed circuit board on which the plurality of lamps are mounted, and the printed circuit board includes a signal wire for supplying a driving voltage to the plurality of lamps. Can be formed.

In addition, a plurality of optical sheets (not shown) may be disposed between the lamp assembly 230 and the curved display panel 210 to reduce light loss and improve uniformity.

At this time, the lamp may use various light sources such as a cold cathode fluorescent lamp, an external electrode fluorescent lamp, a hot cathode fluorescent lamp, and a light emitting diode as a light source.

In addition, the optical sheet includes a diffusion sheet and a prism sheet, and a protective sheet may be added.

On the upper part of the backlight unit configured as described above, the curved display panel 210 including the color filter substrate 201 and the array substrate 211 is mounted in the stepped step 220c of the frame-shaped guide panel 220 as described above. do. In addition, the curved display panel 210, the guide panel 220, and the backlight unit are coupled to each other by the cover bottom 240 at the bottom through a plurality of fastening means to form a curved display device.

At this time, in the guide panel 220 of the present invention, the front surface 220a within the stepped portion 220c on which the curved display panel 210 is seated may implement a curved surface according to the curvature of the curved display panel 210. The rear surface 220b on which the backlight unit is located maintains a flat surface, so that not only the backlight unit but also the cover bottom 240 can use an existing flat structure. Accordingly, it is possible to implement a curved display device regardless of the structure of the light source, while suppressing deformation of mechanical structures due to stress.

In the present invention, in order to maintain the curved surface of the curved display panel 210 in various environments, a step 220c is formed at the edge of the guide panel 220 so that the curved display panel 210 is While inserting and seating in the stepped jaws 220c of the guide panel 220, an additional adhesive means 250 such as double-sided tape is interposed between the curved display panel 210 and the guide panel 220 to enhance adhesion. Characterized in that.

Meanwhile, as described above, the present invention is not applied only to a direct-type backlight unit, but can also be applied to an edge-type backlight unit, and this will be described in detail through a third embodiment of the present invention.

9 is an exploded cross-sectional view schematically showing the structure of a curved display device according to a third embodiment of the present invention, and FIG. 10 is an exploded perspective view schematically showing the structure of a curved display device according to the third embodiment of the present invention. to be.

Referring to the drawings, in the curved display device according to the third embodiment of the present invention, a display panel (ie, a concave curved display panel) 310 and the curved display panel 310 having a curved screen concave A backlight unit positioned at the rear and supplying backlight light to the curved display panel 310 is concavely curved with a constant curvature when the screen of the curved display panel 310 is observed in an XY plane.

Similar to the first and second embodiments of the present invention, the curved display panel 310 may be of a flexible type or a rigid type, and may have a curved shape by various manufacturing methods. For example, after disposing a flat display panel between a first curved mold having a concave shape and a second curved mold having a convex shape facing the first curved mold, a display having a curved shape through heat treatment and press treatment Panels can be manufactured.

The curved display panel 310 may be a liquid crystal display panel, a plasma display panel, an organic light emitting display panel, or the like. As an example, the curved display panel 310 may be a liquid crystal display panel including an array substrate, a color filter substrate facing the array substrate, and a liquid crystal layer interposed between the array substrate and the color filter substrate.

When the curved display panel 310 is configured as a liquid crystal display panel, the size of the color filter substrate may be designed to be smaller than the size of the array substrate. Accordingly, an area not covered by the color filter substrate is exposed. In the exposed area, a pad portion in which the gate driver and the data driver are located may be formed.

The curved display panel 310 may further include a first polarizing film disposed below the array substrate and a second polarizing film disposed above the color filter substrate. The first polarizing film includes a transmission axis in a first direction, and polarizes light in a first direction. The second polarizing film includes a transmission axis in a second direction, and polarizes light in a second direction. For example, the transmission axes of the first polarizing film may be disposed perpendicular to each other.

In this way, a common electrode and a pixel electrode are formed on the liquid crystal display panel to which the color filter substrate and the array substrate are bonded to apply an electric field to the liquid crystal layer, and data applied to the pixel electrode while a voltage is applied to the common electrode When the voltage of the signal is controlled, the liquid crystal of the liquid crystal layer is rotated by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode, so that light is transmitted or blocked for each pixel to display characters or images.

Further, in order to control the voltage of the data signal applied to the pixel electrode for each pixel, a switching device such as a thin film transistor is individually provided in the pixels.

Further, the gate driver and the data driver are coupled to the liquid crystal display panel in various forms to supply scan signals and image information to gate lines and data lines formed on the liquid crystal display panel, thereby driving pixels of the liquid crystal display panel.

When the curved display panel 310 is configured as a liquid crystal display panel, a backlight unit supplying backlight light to the curved display panel 310 is disposed behind the curved display panel 310 configured as described above. I can.

The present invention is not limited to a direct-down method or an edge method according to a method of arranging the light emitting lamps, but when an edge-type backlight unit is specifically described, a plurality of lamps (not shown) on at least one side of the curved display panel 310 A lamp assembly 330 is installed, and a light guide plate 331 and a reflector (not shown) are sequentially installed behind the curved display panel 310.

At this time, although not shown in detail, the lamp assembly 330 may include a printed circuit board on which the plurality of lamps are mounted, and the printed circuit board includes a signal wire for supplying a driving voltage to the plurality of lamps. Can be formed.

In addition, a plurality of optical sheets (not shown) may be disposed between the light guide plate 331 and the curved display panel 310 to reduce loss of light and improve uniformity.

At this time, the lamp may use various light sources such as a cold cathode fluorescent lamp, an external electrode fluorescent lamp, a hot cathode fluorescent lamp, and a light emitting diode as a light source.

In addition, the optical sheet includes a diffusion sheet and a prism sheet, and a protective sheet may be added.

As described above, a curved display panel 310 including the color filter substrate and the array substrate is mounted on the backlight unit configured as described above through the frame-shaped guide panel 320, and the curved display panel 310 The guide panel 320 and the backlight unit are coupled to each other by the cover bottom 340 at the bottom through a plurality of fastening means to form a curved display device.

In this case, the front surface 320a of the guide panel 320 on which the curved display panel 310 is mounted has a curved surface according to the curvature of the curved display panel 310 and a rear surface on which the backlight unit is located. By maintaining the plane 320b, the existing flat structure can be applied to both the backlight unit and the cover bottom 340. Accordingly, it is possible to implement a curved display device regardless of the structure of the light source, while suppressing deformation of mechanical structures due to stress.

Further, according to the present invention, an additional fastening is performed between the curved display panel 310 and the guide panel 320 in order to maintain the curved surface of the curved display panel 310 in various environments. That is, when the curved display panel 310 is seated on the front surface 320a of the guide panel 320 in the same manner as in the first embodiment of the present invention, the curved display panel 310 is attached to the curved display panel 310. It may be fastened to the guide panel 320 through a fixing means or fastened to the guide panel 320 through an attachment means such as double-sided tape.

The product family applied to the present invention can be a small to large display device from a mobile phone to a television.

Although many items are specifically described in the above description, this should be construed as an example of a preferred embodiment rather than limiting the scope of the invention. Therefore, the invention should not be determined by the described embodiments, but should be defined by the claims and equivalents to the claims.

110,210,310: curved display panel 120,220,320: guide panel
130,230,330: lamp assembly 140,240,340: cover bottom
331: light guide plate

Claims (19)

A curved display panel in which the screen is concavely curved;
A backlight unit positioned on a rear surface of the curved display panel to supply backlight light to the curved display panel;
A guide panel in the shape of a frame positioned between the curved display panel and the backlight unit and on which the curved display panel is mounted; And
It is located on the rear surface of the backlight unit and includes a cover bottom coupling between the curved display panel, the guide panel, and the backlight unit,
In the guide panel, a front surface on which the curved display panel is mounted is curved according to a curvature of the curved display panel, and a rear surface on which the backlight unit is located is maintained flat
While the fixing means on the rear surface of the array substrate of the curved display panel is seated on the guide panel, the fixing means passes through the fixing means and is coupled to the upper part of the guide panel by using a "L"-shaped clasp. The curved display device, characterized in that coupled to the lower portion of the guide panel through. The curved display device of claim 1, wherein the curved display panel has a flexible type or a rigid type. delete The curved display device of claim 1, wherein the fixing means is attached to at least one edge of the rear surface of the array substrate of the curved display panel. The curved display device of claim 4, wherein the guide panel includes a seating portion in which a portion corresponding to the fixing means is cut and the fixing means is inserted. delete The curved display device of claim 1, wherein the curved display panel is fastened to the guide panel through an attachment means. 8. The curved display device of claim 7, wherein the attaching means is attached to at least one edge of a rear surface of the curved display panel. delete delete The method of claim 1, wherein the backlight unit
A lamp assembly installed behind the curved display panel and including a plurality of lamps;
A reflector installed on the rear surface of the lamp assembly; And
And a plurality of optical sheets installed between the lamp assembly and the curved display panel. The method of claim 1, wherein the backlight unit
A lamp assembly installed on at least one side of the curved display panel and including a plurality of lamps;
A light guide plate and a reflecting plate sequentially installed on the rear surface of the lamp assembly; And
And a plurality of optical sheets installed between the lamp assembly and the curved display panel. The curved display device of claim 1, wherein the backlight unit and the cover bottom have a flat structure in which front and rear surfaces are flat. The curved display device of claim 1, further comprising a light leakage preventing member formed on a side surface of the curved display panel. The curved display device of claim 14, wherein the light leakage preventing member is formed by curing a black sealant of black resin by ultraviolet (UV) light. The method of claim 1,
The curved display panel,
A flat display panel is disposed between the first curved mold having a concave shape and the second curved mold having a convex shape facing the first curved mold, and then has a curved shape through heat treatment and press treatment. Curved display. The method of claim 1,
And the curved display panel includes an array substrate, a color filter substrate facing the array substrate, and a liquid crystal layer interposed between the array substrate and the color filter substrate. The method of claim 17,
In the curved display panel, the size of the color filter substrate is smaller than the size of the array substrate, an area not covered by the color filter substrate is exposed, and a pad portion in which a gate driver and a data driver are positioned is formed in the exposed area. Curved display device, characterized in that. The method of claim 17,
The curved display panel further comprises a first polarizing film disposed under the array substrate and a second polarizing film disposed above the color filter substrate.

Images