KR20150109743A - Curved display device - Google Patents

Abstract

A curved display device of the present invention realizes a curved display apparatus regardless of a backlight unit in an existing flat structure or a structure of the light source by having the front of a guide panel on which a display panel is seated realize a curve according to a curvature of a curved display panel and the rear where a backlight unit is located remain plane. Meanwhile, the curved display device is for preventing stress from transforming apparatus structures and includes: a curved display panel which concavely bends a screen; a backlight unit which is located on the back of the curved display panel and supplies backlight rays to the curved display panel; a frame-shaped guide panel which is located between the curved display panel and the backlight unit, wherein the curved display panel is seated; and a cover bottom which is located on the back of the backlight unit and couples the spaces between the curved display panel, the guide panel, and the backlight unit. In the guide panel, the front where the curved display panel is seated realizes the curve according to the curvature of the curved display panel and the rear where the backlight unit is located remains plane.

Description

[0001] CURVED DISPLAY DEVICE [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved display device, and more particularly, to a curved display device capable of increasing the immersion feeling of a viewer by producing a curved display panel.

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

However, as the screen becomes larger in size, there is a problem that the viewer has a larger visual difference when viewing the center of the screen and when viewing both sides of the screen.

A problem with the screen of a large-sized television liquid crystal display device is that the screen glare off increases. This problem of visual difference is improved by concave bending of the screen.

1 is a perspective view schematically showing a conventional curved display device.

1, a conventional curved display device 10 includes a display panel (i.e., concave curved display panel) 1 having a concave curved screen and a curved backlight unit (not shown) And is concavely curved with a constant curvature when viewed in the XY plane.

In order to realize a constant curvature in the general curved display device 10, not only the display panel 1, but also the backlight unit has a curved surface structure.

However, there are many obstacles in implementing the mechanical structures of the backlight unit in a curved shape. Further, in the case of such a conventional curved display device 10, there is a restriction that the light source structure can be applied only as a vertical type.

That is, not only each mechanism structure is difficult to maintain a curved shape, but also many parts such as a large number of screws and a reinforcing bar are required in response to a large amount of stress in order to maintain the curved surface in such an environment. Also, for this reason, as time elapses, the rigidity of the mechanism structures weakens and it becomes more difficult to maintain the curved surface.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a curved display device to which a flat backlight unit can be applied.

Other objects and features of the present invention will be described in the following description of the invention and the claims.

According to an aspect of the present invention, there is provided a curved display device including: a curved display panel having a concave curved screen; A backlight unit positioned at the back of the curved display panel and supplying backlight to the curved display panel; A frame-shaped guide panel positioned between the curved display panel and the backlight unit and on which the curved display panel is mounted; And a cover bottom which is located on the back surface of the backlight unit and couples the curved display panel with the guide panel and the backlight unit, wherein the front surface on which the curved display panel is mounted is a curved surface of the curved display panel The rear surface on which the backlight unit is positioned can maintain a flat surface.

At this time, 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 formed of a liquid crystal display panel, the curved display panel may further include fixing means attached to at least one side edge of the back surface of the array substrate.

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

At this time, the fixing means is coupled to the upper portion of the guide panel through the fixing means using the latch of the letter "A " in a state where the fixing means is seated on the seating portion of the guide panel, As shown in FIG.

When the curved display panel is constituted by a liquid crystal display panel, the curved display panel can be fastened to the guide panel through the attachment means.

At this time, the attaching means may be attached to at least one side edge of the back surface of the array substrate of the curved display panel.

The guide panel may have a predetermined step at the edge of the front surface so that the curved display panel can be fitted and seated.

At this time, an adhesive means interposed between the curved display panel and the guide panel may be further included.

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

Wherein the backlight unit is disposed on at least one side of the curved display panel, the lamp assembly comprising a plurality of lamps; A light guide plate and a reflection plate sequentially disposed on the back surface of the lamp assembly; And a plurality of optical sheets provided between the lamp assembly and the curved display panel.

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

And a light leakage preventing member formed on a side surface of the curved display panel.

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

As described above, in the curved display device according to the embodiment of the present invention, the front surface of the guide panel on which the display panel is mounted implements a curved surface according to the curvature of the curved display panel, The rear surface maintains a flat surface, thereby providing a curved display device regardless of the structure of the light source as well as the backlight unit of the conventional flat structure, while suppressing deformation of the mechanism structures due to stress.

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

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification. The dimensions and relative sizes of the layers and regions in the figures may be exaggerated for clarity of illustration.

It will be understood that when an element or layer is referred to as being another element or "on" or "on ", it includes both intervening layers or other elements in the middle, do. On the other hand, when a device is referred to as "directly on" or "directly above ", it does not intervene another device or layer in the middle.

The terms spatially relative, "below," "lower," "above," "upper," and the like, And may be used to easily describe the correlation with other elements or components. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element. Thus, the exemplary term "below" can include both downward and upward directions.

The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprise "and / or" comprising ", as used in the specification, means that the presence of stated elements, Or additions.

2 is a perspective view schematically showing 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. FIG. 4 is a cross-sectional view of the first embodiment of the present invention shown in FIG. 2 Fig. 5 is an exploded perspective view schematically showing the structure of a curved display device according to the first embodiment of the present invention.

Referring to the drawings, a curved display device 100 according to a first embodiment of the present invention includes a display panel (i.e., concave curved display panel) 110 in which a screen is concavely curved and a curved display panel And a backlight unit positioned behind the curved display panel 110 and supplying backlight to the curved display panel 110. When the screen of the curved display panel 110 is observed in the XY plane, It is bent.

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

The curved display panel 110 may be either a flexible type or a rigid type, and may have a curved shape by various manufacturing methods. For example, a flat display panel may be disposed between a first curved mold having a concave shape and a second curved mold having a convex shape facing the first curved mold, and then a flat display panel may be disposed between the curved shape 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. For example, the curved display panel 110 may be an array substrate, a color filter substrate facing the array substrate, and a liquid crystal display panel including a liquid crystal layer disposed between the array substrate and the color filter substrate.

When the curved display panel 110 is constituted by 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. As a result, an area not covered by the color filter substrate is exposed. And a pad portion in which the gate driver and the data driver are located may be formed in the exposed region.

At this time, though not shown, the color filter substrate is divided into a color filter composed of a plurality of sub-color filters implementing the colors of red, green and blue and the sub-color filters A black matrix for blocking light transmitted through the liquid crystal layer, and a transparent common electrode for applying a voltage to the liquid crystal layer.

The array substrate includes a plurality of gate lines and data lines arranged longitudinally and laterally and defining a plurality of pixel regions, a thin film transistor serving as a switching element formed in a crossing region between the gate lines and the data lines, and a pixel electrode formed on the pixel region consist of. At this time, in the case of an in-plane switching (IPS) type liquid crystal display device, 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 on the lower side of the array substrate and a second polarizing film disposed on the upper side of 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 the light in a second direction. For example, the transmission axis of the first polarizing film may be perpendicular to the transmission axis of the second polarizing film.

In the liquid crystal display panel in which the color filter substrate and the array substrate are bonded together, a common electrode and a pixel electrode are formed to apply an electric field to the liquid crystal layer, and data applied to the pixel electrode in a state where a voltage is applied to the common electrode When the voltage of the signal is controlled, the liquid crystal of the liquid crystal layer rotates by dielectric anisotropy according to an electric field between the common electrode and the pixel electrode to transmit or block light for each pixel to display characters or images.

In order to control the voltage of the data signal applied to the pixel electrode on a pixel-by-pixel basis, a switching element such as a thin film transistor is separately provided in the pixels.

The gate driving unit and the data driving unit are coupled with the liquid crystal display panel in various forms to supply the scanning signals and the image information to the gate lines and the data lines formed on the liquid crystal display panel, thereby driving the pixels of the liquid crystal display panel.

When the curved display panel 110 is formed of an organic light emitting display panel, the organic light emitting display panel includes a TFT substrate on which an active region and a pad region are defined, and a sealing layer on the TFT substrate, .

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

On the TFT substrate, a multi-layered barrier layer may be formed to prevent moisture from the back surface of the TFT substrate, but the present invention is not limited thereto.

On the sealing layer, a polarizing plate for preventing reflection of light incident from outside is attached through a second adhesive layer.

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

Pad electrodes for transmitting an electric signal to the scan driver and the data driver are located in a pad region of the TFT substrate.

The sealing layer is formed on the organic light emitting diodes and the driving circuits formed on the TFT substrate to seal the organic light emitting diodes and the 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 for supplying backlight to the curved display panel 110 is disposed behind the curved display panel 110 .

Although the present invention is not limited to a direct type or an edge type according to a method of arranging a light emitting lamp, for example, a direct type backlight unit will be concretely described. A plurality of lamps (not shown) are disposed behind the curved display panel 110 And a reflector (not shown) is installed on the rear surface of the lamp assembly 130. The lamp assembly 130 is mounted on a rear surface of the lamp assembly 130,

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

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

At this time, the lamp may be a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), a hot cathode fluorescent lamp (HCFL), and a light emitting diode Emitting Diode (LED).

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

The diffusion sheet disperses the light incident from the lamp, thereby preventing light from being partially concentrated and causing unevenness in an image displayed on the curved display panel 110.

The prism sheet collects light incident from the diffusion sheet and uniformly distributes the light on the front surface of the curved display panel 110.

Further, the protective sheet protects the optical sheet sensitive to dust and scratches, prevents the optical sheet from flowing when the backlight unit is carried, and has a function of diffusing light incident from the prism sheet, Can be distributed.

As described above, the curved display panel 110 composed of the color filter substrate and the array substrate is mounted on the upper part of the backlight unit thus configured through the guide panel 120 of the frame type, The guide panel 120 and the backlight unit are coupled to each other by the lower cover bottom 140 through a plurality of fastening means to constitute the curved display device 100.

In the guide panel 120 of the present invention, the front surface 120a on which the curved display panel 110 is mounted forms a curved surface according to the curvature of the curved display panel 110, (120b) maintains a flat surface so that not only the backlight unit but also the cover bottom 140 can apply the conventional flat structure. Accordingly, the curved display device 100 can be implemented regardless of the structure of the light source, and the deformation of the mechanism structures due to the stress can be suppressed.

In other words, in the conventional curved display device, there is a limitation in implementing the shape of the backlight unit. However, in the case of the present invention, the backlight unit has the same flat structure as the conventional one and the guide panel 120 Only the portion of the front surface 120a is realized as a curved shape.

In this case, it is possible to realize a structure in which the mechanical structures that are constrained to maintain the curved surface are formed as a plane, thereby reducing the stress to which each mechanical structure is subjected, thereby preventing deformation in various environments. In addition, although the light source structure is limited only by the vertical structure, the present invention can be applied to various structures such as horizontal and direct.

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

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

5A illustrates a case of fastening to a guide panel through a fixing means attached to a curved display panel, and FIG. 5B illustrates an example of fastening to a guide panel through a double-faced tape .

Referring to the drawings, a curved display panel 110 according to a first embodiment of the present invention includes a color filter substrate 101, an array substrate 111 and a color filter substrate 111, And a liquid crystal layer (not shown) formed in the cell gap between the substrate 101 and the array substrate 111.

At this time, the curved display device according to the first embodiment of the present invention can reduce the thickness of the curved display device by removing the existing case top covering the edge of the curved display panel 110, The width of the curved display device can be reduced, and the step on 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 can leak to the side of the curved display panel 110 through total internal reflection. Therefore, in the present invention, Shielding member 115 is additionally formed on the side of the curved display panel 110 in order to shield the light-shielding member 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.

Although not shown, the light leakage preventing member 115 may extend to the upper surface of the color filter substrate 101, and may be formed in contact with the second polarizing film formed on the color filter substrate 101, 2 < / RTI > polarizing film. Also, the light leakage preventing member 115 may extend to a lower surface of the array substrate 111.

The curved display panel 110 is generally formed in a rectangular shape so that the light leakage preventing member 115 can be formed on all four sides of the curved display panel 110, When the flexible printed circuit film is used, the light leakage preventing member 115 may be formed on only 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 by ultraviolet (UV). In order to improve the light leakage prevention effect of the light leakage preventing member 115, Increase the degree of black.

5A, predetermined fixing means 116 may be attached to at least one side of the back surface of the array substrate 111 of the curved display panel 110, preferably at both side edges thereof.

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 part 122 where a portion corresponding to the fixing means 116 is cut and the fixing means 116 is fitted and seated.

After the fixing means 116 is seated on the seating portion 122 of the guide panel 120 ', the fixing means 116 is pushed through the fixing means 116 using the latch 121 of the " Is coupled to the upper portion of the guide panel 120 ', and is coupled to the lower portion of the guide panel 120' through the screw 125. At this time, the guide panel 120 'may be divided into an upper portion where the seating portion 122 is formed and a lower portion where the screws 125 are fastened.

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

At this time, the attaching means 150 may be attached to at least one side of the back surface of the array substrate 111 of the curved display panel 110, preferably at the three side edges except the portion where the driving portion is located.

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

FIG. 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 a second embodiment of the present invention. to be.

8 is an enlarged cross-sectional view of part B of the curved display device according to the second embodiment of the present invention shown in FIG.

Referring to the drawings, a curved display device according to a second embodiment of the present invention includes a display panel (i.e., concave curved display panel) 210 having a concave curved screen, a curved display panel 210, And a backlight unit disposed at a rear side to supply backlight to the curved display panel 210. When the screen of the curved display panel 210 is viewed in the XY plane, the curved display panel 210 is concavely curved with a certain curvature.

As described above, the curved display panel 210 can be either a flexible type or a rigid type, and can have a curved shape by various manufacturing methods. For example, a flat display panel may be disposed between a first curved mold having a concave shape and a second curved mold facing a convex shape facing the first curved mold, and then a flat display panel having a curved shape Panel can be manufactured.

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 opposed to the array substrate 211, and a color filter substrate 201 disposed between the array substrate 211 and the color filter substrate 201 And may be a liquid crystal display panel including a liquid crystal layer (not shown).

When the curved display panel 210 is formed of 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. As a result, an area not covered by the color filter substrate 201 is exposed. And a pad portion in which the gate driver and the data driver are located may be formed in the exposed region.

At this time, although not shown, the color filter substrate 201 separates a color filter composed of a plurality of sub-color filters implementing the colors of red, green, and blue and the light passing through the liquid crystal layer And a transparent common electrode for applying a voltage to the liquid crystal layer.

The array substrate 211 includes a plurality of gate lines and data lines arranged longitudinally and laterally to define a plurality of pixel regions, a thin film transistor serving as a switching element formed in a crossing region between the gate lines and the data lines, And a pixel electrode.

The curved display panel 210 may further include a first polarizing film disposed on the lower side of the array substrate 211 and a second polarizing film disposed on the upper side of 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 the light in a second direction. For example, the transmission axis of the first polarizing film may be perpendicular to the transmission axis of the second polarizing film.

In the liquid crystal display panel in which the color filter substrate 201 and the array substrate 211 are adhered together, a common electrode and a pixel electrode are formed to apply an electric field to the liquid crystal layer. In a state where a 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 rotates due to the dielectric anisotropy according to the electric field between the common electrode and the pixel electrode, .

In order to control the voltage of the data signal applied to the pixel electrode on a pixel-by-pixel basis, a switching element such as a thin film transistor is separately provided in the pixels.

The gate driving unit and the data driving unit are coupled with the liquid crystal display panel in various forms to supply the scanning signals and the image information to the gate lines and the data lines formed on the liquid crystal display panel, thereby driving the pixels of the liquid crystal display panel.

At this time, the curved display device according to the second embodiment of the present invention is similar to the first embodiment of the present invention by removing the existing case top covering the edges of the curved display panel 210, It is possible to reduce the thickness, reduce the bezel width of the curved display device, and eliminate the step on the front surface of the curved display device.

At this time, in the present invention, a light-leakage preventing member 215 is additionally formed on a side surface of the curved display panel 210 in order to block the light leakage that may occur at the side of the curved display panel 210 and close the side . 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.

Although not shown, the light leakage preventing member 215 may extend to the upper surface of the color filter substrate 201, and may be formed in contact with a second polarizing film formed on the color filter substrate 201, 2 < / RTI > polarizing film. The light-shielding member 215 may extend to a lower surface of the array substrate 211.

The curved display panel 210 is generally rectangular in shape so that the light leakage preventing member 215 can be formed on all four sides of the curved display panel 210, When the flexible printed circuit film is used, the light leakage prevention member 215 may be formed on only three sides of the curved display panel 210.

The light leakage prevention member 215 may be formed by curing the black sealant of the black resin with ultraviolet rays. In order to improve the light leakage prevention effect of the light leakage prevention 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 for supplying backlight to the curved display panel 210 is disposed behind the curved display panel 210 having the above- .

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

In this case, although not shown in detail, the lamp assembly 230 may include a printed circuit board on which the plurality of lamps are mounted, and a signal line for supplying a driving voltage to the plurality of lamps .

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.

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

A curved display panel 210 composed of the color filter substrate 201 and the array substrate 211 is placed on the step 220c of the frame-shaped guide panel 220, do. The curved display panel 210, the guide panel 220 and the backlight unit are coupled to each other by a lower cover bottom 240 through a plurality of fastening means to constitute a curved display device.

At this time, the guide panel 220 of the present invention realizes a curved surface according to the curvature of the curved display panel 210, while the front surface 220a in the step 220c on which the curved display panel 210 is mounted The back surface 220b on which the backlight unit is positioned can maintain a flat surface so that not only the backlight unit but also the cover bottom 240 can apply the conventional flat structure. Accordingly, it is possible to implement a curved display device regardless of the structure of the light source, while suppressing deformation of the mechanism structures due to stress.

In order to maintain the curved surface of the curved display panel 210 in various environments, a predetermined step 220c may be formed at the edge of the guide panel 220 to form the curved display panel 210 And is attached between the curved display panel 210 and the guide panel 220 through an adhesive means 250 such as a double-sided tape to enhance the adhesive force. .

As described above, the present invention is applicable not only to the backlight unit of the direct-type but also to the edge-type backlight unit, which will be described in detail through the third embodiment of the present invention.

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

Referring to the drawings, a curved display device according to a third embodiment of the present invention includes a display panel (i.e., a concave curved display panel) 310 having a concave curved screen, a curved display panel 310, And a backlight unit disposed at a rear side to supply backlight to the curved display panel 310. When the screen of the curved display panel 310 is viewed in the XY plane, the curved display panel 310 is concavely curved with a certain curvature.

As in the first and second embodiments of the present invention, the curved display panel 310 can be a flexible type or a rigid type, and can have a curved shape by various manufacturing methods. For example, a flat display panel may be disposed between a first curved mold having a concave shape and a second curved mold facing a convex shape facing the first curved mold, and then a flat display panel having a curved shape Panel 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. For example, the curved display panel 310 may be an array substrate, a color filter substrate facing the array substrate, and a liquid crystal display panel including a liquid crystal layer disposed between the array substrate and the color filter substrate.

When the curved display panel 310 is constituted by 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. As a result, an area not covered by the color filter substrate is exposed. And a pad portion in which the gate driver and the data driver are located may be formed in the exposed region.

The curved display panel 310 may further include a first polarizing film disposed on the lower side of the array substrate and a second polarizing film disposed on 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 the light in a second direction. For example, the transmission axis of the first polarizing film may be perpendicular to the transmission axis of the second polarizing film.

In the liquid crystal display panel in which the color filter substrate and the array substrate are bonded together, a common electrode and a pixel electrode are formed to apply an electric field to the liquid crystal layer, and data applied to the pixel electrode in a state where a voltage is applied to the common electrode When the voltage of the signal is controlled, the liquid crystal of the liquid crystal layer rotates by dielectric anisotropy according to an electric field between the common electrode and the pixel electrode to transmit or block light for each pixel to display characters or images.

In order to control the voltage of the data signal applied to the pixel electrode on a pixel-by-pixel basis, a switching element such as a thin film transistor is separately provided in the pixels.

The gate driving unit and the data driving unit are coupled with the liquid crystal display panel in various forms to supply the scanning signals and the image information to the gate lines and the data lines formed on the liquid crystal display panel, thereby driving the pixels of the liquid crystal display panel.

When the curved display panel 310 is configured as a liquid crystal display panel, a backlight unit for supplying backlight to the curved display panel 310 is disposed behind the curved display panel 310 having the above- .

For example, the edge-type backlight unit may include a plurality of lamps (not shown) disposed on at least one side of the curved display panel 310, And a light guide plate 331 and a reflection plate (not shown) are installed on the back of the curved display panel 310 in order.

In this case, although not shown in detail, the lamp assembly 330 may include a printed circuit board on which the plurality of lamps are mounted, and a signal line for supplying a driving voltage to the plurality of lamps .

A plurality of optical sheets (not shown) may be disposed between the light guide plate 331 and the curved display panel 310 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.

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

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

In the guide panel 320 of the present invention, the front surface 320a, on which the curved display panel 310 is mounted, forms a curved surface according to the curvature of the curved display panel 310, The cover layer 320b can be flat so that not only the backlight unit but also the cover bottom 340 can apply the conventional flat structure. Accordingly, it is possible to implement a curved display device regardless of the structure of the light source, while suppressing deformation of the mechanism structures due to stress.

Further, in the present invention, additional fastening is performed between the curved display panel 310 and the guide panel 320 to maintain the curved surface of the curved display panel 310 in various environments. That is, when the curved display panel 310 is mounted on the front surface 320a of the guide panel 320, as in the first embodiment of the present invention, Can be fastened to the guide panel 320 through fastening means or fastened to the guide panel 320 through fastening means such as double-sided tape.

The product family applied to the present invention can be a small-sized and large-sized display device from a cell phone to a television.

While a great many are described in the foregoing description, it should be construed as an example of preferred embodiments rather than limiting the scope of the invention. Therefore, the invention should not be construed as limited to the embodiments described, but should be determined by equivalents to the appended claims and 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 (15)

A curved display panel in which a screen is concavely curved;
A backlight unit positioned at the back of the curved display panel and supplying backlight to the curved display panel;
A frame-shaped guide panel positioned between the curved display panel and the backlight unit and on which the curved display panel is mounted; And
And a cover bottom which is located on the back surface of the backlight unit and couples the curved display panel with the guide panel and the backlight unit,
Wherein the front surface of the guide panel, on which the curved display panel is mounted, forms a curved surface according to the curvature of the curved display panel, and the rear surface on which the backlight unit is positioned maintains a flat surface. The curved display device according to claim 1, wherein the curved display panel is of a flexible type or a rigid type. The curved display device according to claim 1, wherein the curved display panel comprises a liquid crystal display panel, a plasma display panel, or an organic light emitting display panel. The display device according to claim 3, further comprising fixing means attached to at least one side edge of the back surface of the array substrate of the curved display panel when the curved display panel is formed of a liquid crystal display panel Device. 5. The curved display device according to claim 4, wherein the guide panel has a seating portion in which a portion corresponding to the fixing means is cut and the fixing means is fitted and seated. 6. The apparatus according to claim 5, wherein the fixing means is coupled to the upper portion of the guide panel through the fixing means using a latch of the letter "A " And the guide panel is coupled to the lower portion of the guide panel through the guide panel. The curved display device according to claim 3, wherein when the curved display panel is constituted by a liquid crystal display panel, the curved display panel is fastened to the guide panel through an attaching means. The curved display device according to claim 7, wherein the attachment means is attached to at least one side edge of the back surface of the array substrate of the curved display panel. The curved display device according to claim 1, wherein the guide panel has a predetermined step at the edge of the front surface so that the curved display panel can be fitted and seated. The curved display device according to claim 9, further comprising an adhesion means interposed between the curved display panel and the guide panel. The backlight unit according to claim 1,
A lamp assembly disposed behind the curved display panel and including a plurality of lamps;
A reflector installed on a rear surface of the lamp assembly; And
And a plurality of optical sheets provided between the lamp assembly and the curved display panel. The backlight unit according to claim 1,
A lamp assembly installed on at least one side of the curved display panel, the lamp assembly comprising a plurality of lamps;
A light guide plate and a reflection plate sequentially disposed on the back surface of the lamp assembly; And
And a plurality of optical sheets provided between the lamp assembly and the curved display panel. The curved display device according to claim 1, wherein the backlight unit and the cover bottom have a flat structure in which a front surface and a rear surface are flat. The curved display device according to claim 1, further comprising a light leakage preventing member formed on a side surface of the curved display panel. 15. The curved display device according to claim 14, wherein the light leakage preventing member is formed by curing a black sealant of black resin by ultraviolet (UV).

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