Curved display device

Abstract

A curved display device is provided in which light leakage is prevented or reduced even when a display panel is bent. The curved display device includes a display portion having a first curvature and a second curvature greater than the first curvature, a driving portion that drives the display portion, and a connecting portion connecting the driving portion and the display portion. The connecting portion includes a patterned region disposed between the display portion having the second curvature and the driving portion.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2021-0187058, filed on December 24, 2021, which is hereby incorporated by reference as if fully set forth herein. Technical Field

[0003] The present disclosure relates to a curved display device for displaying images. Background Art

[0004] With the development of the information age, the demand for display devices for displaying images in various forms has increased. Therefore, various types of display devices have been used recently, such as liquid crystal display (LCD) devices, plasma display panel (PDP) devices, organic light emitting display (OLED) devices, and quantum dot light emitting display (QLED) devices.

[0005] The application range of display devices has expanded to vehicles, as well as computer and TV monitors. Research is underway into display devices with wide display areas that do not degrade image visibility depending on the user's position. Recently, research is actively underway into curved display devices with a predetermined curvature to prevent image visibility from degrading depending on the user's position.

[0006] A general curved display device includes a display panel having flexibility and displaying an image, a circuit board for driving the display panel, and a connector disposed between the display panel and the circuit board to electrically connect the display panel and the circuit board.

[0007] In a typical curved display device, the display panel is made of a flexible material, while the circuit board is made of an inflexible material. Therefore, when the display panel is bent to have a curvature, the connection between the display panel and the circuit board is torn, causing light leakage. Summary of the Invention

[0008] The present disclosure is made in view of the above-mentioned problems, and an object of the present disclosure is to provide a curved display device in which light leakage does not occur or light leakage is reduced even when a display panel is bent.

[0009] In addition to the objects of the present disclosure as mentioned above, other objects and features of the present disclosure will be clearly understood by those skilled in the art from the following description of the present disclosure.

[0010] According to one aspect of the present disclosure, the above-mentioned and other objects can be achieved by providing a curved display device, which includes: a display portion having a first curvature and a second curvature greater than the first curvature, a driving portion that drives the display portion, and a connecting portion that connects the driving portion to the display portion, wherein the connecting portion includes a pattern area having a pattern and is arranged between the display portion having the second curvature and the driving portion.

[0011] According to another aspect of the present disclosure, the above-mentioned and other objects can be achieved by providing a curved display device, which includes: a display portion having a curvature, a driving portion that drives the display portion, and a connecting portion that connects the driving portion to the display portion, wherein the connecting portion includes a patterned area arranged between the display portion having a curvature and the driving portion.

[0012] According to another aspect of the present disclosure, a curved display device includes: a display portion, the display portion including a first area having a first curvature and a second area having a second curvature, a driving portion that drives the display portion; and a connecting portion, the connecting portion connecting the driving portion with the display portion, wherein the distance between the second area and the driving portion is greater than the distance between the first area and the driving portion, wherein the connecting portion includes a pattern area having a pattern and arranged between the second area and the driving portion, wherein the shape of the pattern changes according to the amount of change in the curvature of the pattern area. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and other objects, features and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0014] Figure 1 is a perspective view showing a curved display device according to one embodiment of the present disclosure;

[0015] Figure 2 It shows Figure 1 A side view of line II' shown;

[0016] Figure 3 yes Figure 1 Floor plan;

[0017] Figure 4 It shows Figure 3 A schematic enlarged view of a portion G;

[0018] Figure 5 is an exemplary view showing an amount of change in curvature of a pattern area;

[0019] Figure 6 is a diagram showing an example of a pattern based on an amount of change in curvature of a pattern area;

[0020] Figure 7is a view showing another example of a pattern based on an amount of change in curvature of a pattern area;

[0021] Figure 8 is a diagram showing other examples of patterns based on the amount of change in curvature of the pattern area;

[0022] Figure 9A is a view showing a comparative example in which a general connection portion having no pattern is rotated by up to 2° based on the Z axis;

[0023] Figure 9B It is shown in Figure 9A A graph comparing the stress transferred to the display panel in a general connection portion and the stress transferred to the display panel in the connection portion of the present disclosure under the conditions of FIG. 1 ;

[0024] Figure 10A is a view showing a comparative example in which a general connection portion having no pattern is rotated by up to 0.001° based on the Y axis;

[0025] Figure 10B It is shown in Figure 10A A graph comparing the stress transferred to the display panel in a general connection portion and the stress transferred to the display panel in the connection portion of the present disclosure under the conditions of FIG. 1 ;

[0026] Figure 11A is a view showing black uniformity of a curved display device when a general connection portion having no pattern has a curvature;

[0027] Figure 11B is a view illustrating black uniformity of a curved display device according to one embodiment of the present disclosure;

[0028] Figure 12A is a view showing stress applied to the display panel when only one driver IC is provided; and

[0029] Figure 12B is a view illustrating stress applied to a display panel in a curved display device according to one embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to refer to the same or like parts.

[0031] The advantages and features of the present disclosure and their implementation methods will be illustrated by the embodiments described below with reference to the accompanying drawings. However, the present disclosure can be implemented in different forms, and the present disclosure should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be thorough and complete and will fully convey the scope of the present disclosure to those skilled in the art. Furthermore, the present disclosure is limited only by the scope of the claims.

[0032] The shapes, sizes, ratios, angles, and numbers disclosed in the accompanying drawings for describing the embodiments of the present disclosure are merely examples, and therefore, the present disclosure is not limited to the details shown. Like reference numerals refer to like elements throughout. In the following description, when a detailed description of a related known function or configuration is determined to be unnecessary to obscure the key points of the present disclosure, the detailed description will be omitted.

[0033] When the terms "including," "having," and "comprising" are used in this specification, other parts may be added unless "only..." is used. Terms in the singular may include plural forms unless otherwise indicated. When explaining an element, the element is interpreted as including a range of errors even if not explicitly described.

[0034] When describing a positional relationship, for example, when the positional relationship between two parts is described as "on," "above," "below," and "beside," one or more other parts may be set between the two parts, unless "immediately" or "directly" is used.

[0035] When describing a temporal relationship, for example, when a time sequence is described as "after," "subsequently," "next," and "before," discontinuous cases may be included unless "immediately" or "directly" is used.

[0036] It will be understood that although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this disclosure.

[0037] The “X-axis direction,” “Y-axis direction,” and “Z-axis direction” should not be interpreted only by the geometric relationship of being perpendicular to each other, and may have broader directivities within the range in which the elements of the present disclosure can functionally function.

[0038] The term "at least one" should be understood to include any and all combinations of one or more of the associated enumerated items. For example, the meaning of "at least one of the first, second, and third items" means all combinations of items proposed from two or more of the first, second, and third items, as well as the first, second, or third item.

[0039] As will be fully understood by those skilled in the art, the features of the various embodiments of the present disclosure may be coupled or combined with each other in part or in whole, and may interoperate with each other in various ways and be technically driven. The embodiments of the present disclosure may be performed independently of each other, or may be performed together in a mutually dependent relationship.

[0040] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0041] Figure 1 is a perspective view showing a curved display device according to one embodiment of the present disclosure, Figure 2 It shows Figure 1 A side view of line II' is shown, Figure 3 yes Figure 1 Floor plan, and Figure 4 It shows Figure 3 Schematic enlarged view of part G.

[0042] Hereinafter, the X-axis represents the long side direction of the display panel and can be expressed as a first direction, the Y-axis represents the bending direction of the display panel or the thickness direction of the display panel and can be expressed as a second direction, and the Z-axis represents the short side direction of the display panel and can be expressed as a third direction.

[0043] Reference Figures 1 to 4 , a curved display device 100 according to one embodiment of the present disclosure may include a display portion 110, a driving portion 130, and a connecting portion 150. The display portion 110 may be bent to have a predetermined curvature. For example, the display portion 110 may be bent to have a first curvature C1 and a second curvature C2 greater than the first curvature C1. In this case, the connecting portion 150 may include a pattern area 151 disposed between the driving portion 130 and the display portion 110 having the second curvature C2. The pattern area 151 may include various types of patterns P, and a portion of the connecting portion 150 is removed from the pattern P. The pattern P is used to reduce and / or distribute the external force (or stress) applied to the connecting portion 150 (or the pattern area 151) when the display portion 110 is bent.

[0044] The reason why the external force (or stress) applied to the connecting portion 150 is reduced is that the display portion 110 is configured as a flexible, i.e., bendable, flexible display portion, and the driving portion 130 for driving the display portion 110 is not flexible, so when the display portion 110 is bent (or curved) to have a curvature, the display portion 110 is damaged to cause light leakage.

[0045] In more detail, since the plurality of lines and circuits provided in the driving portion 130 may be damaged when the driving portion 130 is bent, the driving portion 130 may be provided to be flat so as not to bend. Therefore, the driving portion 130 may be coupled to a flat support member such as a bottom cover or a separate support member, and may be connected to the display portion 110 through the connecting portion 150. In this case, when the display portion 110 is bent to have a curvature, an external force (or stress) may be applied to the connecting portion 150 connecting the flat driving portion 130 to the bent display portion 110, so that the display portion 110 may be torn, thereby possibly causing a problem of light leakage when an image is output.

[0046] In order to solve the above problem, in the curved display device 100 according to one embodiment of the present disclosure, a pattern area 151 having a pattern P is formed at a portion of the connecting portion 150 to which an external force (or stress) is greatly applied, so that the external force (or stress) applied to the connecting portion 150 is dispersed to prevent the display portion 110 from being torn, thereby avoiding or reducing light leakage.

[0047] In the following, reference will be made to Figures 1 to 4 The display part 110 , the driving part 130 , and the connecting part 150 of the curved display device 100 according to one embodiment of the present disclosure are described in detail.

[0048] Reference Figures 1 to 4 The display portion 110 may include a display panel 111 , a guide panel 112 , an impact buffer 113 , a bottom cover 114 , and a driving IC 115 .

[0049] The display panel 111 may include a lower substrate 111a and an upper substrate 111b bonded to each other. According to one example, the lower substrate 111a may include thin film transistors (not shown) for driving a plurality of pixels. Therefore, the lower substrate 111a may be a transistor array substrate. As another example, the lower substrate 111a may be a base substrate or a first substrate. The lower substrate 111a may be a transparent glass substrate or a transparent plastic substrate.

[0050] The upper substrate 111b may be bonded to the lower substrate 111a so as to face each other. For example, the upper substrate 111b may have a size smaller than that of the lower substrate 111a and may be bonded to the remaining portion of the lower substrate 111a except for the pad portion so as to face each other. The upper substrate 111b may be a second substrate, a packaging substrate, or a color filter substrate. The upper substrate 111b may be bonded to the first surface of the lower substrate 111a using an adhesive member (or a transparent adhesive) SL through a substrate bonding process. A portion of the driver IC 115 and / or a portion of the connection portion 150 may be coupled to the pad portion.

[0051] Liquid crystals (LC) may be provided between the lower substrate 111a and the upper substrate 111b. The liquid crystals (LC) may be surrounded by the adhesive member SL, the upper substrate 111b, and the lower substrate 111a. In the display panel 111, liquid crystal (LC) cells constituting pixel units are arranged in a matrix, and the light transmittance of the liquid crystal cells is adjusted so that an image can be output through the display portion DP.

[0052] The polarizing plate may be coupled to the display panel 111. The polarizing plate is used to cross-polarize the light passing through the display panel 111. The polarizing plate may include an upper polarizing plate UP provided on the upper surface of the upper substrate 111b and a lower polarizing plate LP provided on the lower surface of the lower substrate 111a. The upper polarizing plate UP and the lower polarizing plate LP may be arranged so that the polarization axes cross each other. The lower polarizing plate LP may polarize the light incident on the display panel 111, and the upper polarizing plate UP may be used as an analyzer for causing light vibrating in random directions to vibrate only in one direction. The lower polarizing plate LP may be provided on the lower surface of the lower substrate 111a so that it may be spaced apart from the impact buffer 113, but is not limited thereto. The lower polarizing plate LP may be provided on the lower surface of the lower substrate 111a so that it may be adjacent to the impact buffer 113.

[0053] A backlight unit may be provided below the display panel 111. The backlight unit may include an optical sheet SH, a light guide plate LGP, and a light array LA. The optical sheet SH may be provided parallel to the rear surface of the display panel 111. The optical sheet SH may include a plurality of sheets to uniformly illuminate the light incident from the light guide plate LGP to the display panel 111. For example, the optical sheet SH may include a protective sheet, a prism sheet, and a diffusion sheet.

[0054] The light guide panel LGP may be formed in a flat plate shape to have a light incident surface so that light incident on the light incident surface from the light emitting array LA may move toward the display panel 111. A reflective sheet (not shown) may be further provided on the rear surface of the light guide panel LGP, that is, between the light guide panel LGP and the bottom cover 114, for reflecting light emitted toward the rear surface of the light guide panel LGP toward the display panel 111.

[0055] The light emitting array LA is configured to emit light so that the light is incident on the light incident surface of the light guide plate LGP. The light emitting array LA may be provided on the sidewall of the bottom cover 114 so as to face the light incident surface of the light guide plate LGP. At least one of a cold cathode fluorescent lamp, an external electrode fluorescent light source, a surface light source, or an LED may be used as the light emitting array LA.

[0056] The guide panel 112 is used to support the display panel 111. For example, the guide panel 112 may be supported by the bottom cover 114 (or the side wall of the bottom cover 114) to support the bottom surface of the display panel 111. The guide panel 112 may be provided in the form of a "T" shape laid out as a whole. Figure 2 As shown, the guide panel 112 may include a vertical portion 112a attached to the sidewall of the bottom cover 114 and a horizontal portion protruding from the vertical portion 112a toward the center of the display panel 111, with the optical sheet SH positioned on the horizontal portion. The impact buffer 113 may be supported by the horizontal portion, thereby contacting the lower surface of the lower substrate 111a and supporting the lower substrate 111a. Since the guide panel 112 is attached to the sidewall of the bottom cover 114 protruding from the side of the display panel 111, a portion of the guide panel 112 may partially protrude from the side of the display panel 111. The guide panel protruding from the side of the display panel 111 may be the vertical portion 112a of the guide panel 112.

[0057] The shock buffer 113 is used to reduce external shock applied to the display panel 111. The shock buffer 113 according to one example may be made of a foam material capable of absorbing shock. The shock buffer 113 may be provided between the rear surface (or lower surface) of the lower substrate 111a and the horizontal portion of the guide panel 112. The shock buffer 113 may be coupled to the rear surface of the lower substrate 111a at a position spaced apart from the lower polarizing plate LP. The shock buffer 113 may reduce the shock transmitted to the display panel 111 by absorbing the shock transmitted through the bottom cover 114 and / or the guide panel 112. Figure 2 As shown, a portion of the connection portion 150 coupled to the lower substrate 111 a may overlap the impact buffer 113 and / or the horizontal portion of the guide panel 112 in the second direction (Y-axis direction).

[0058] The bottom cover 114 is used to support the guide panel 112 and the display panel 111. The bottom cover 114 serves as a rear cover of the display portion 110 and may be located on the rear surface of the display portion 110 opposite to the display portion DP. The bottom cover 114 may include a bottom surface that contacts the lower surface of the light guide plate LGP and side walls extending in a vertical direction from the bottom surface. As described above, the vertical portion 112a of the guide panel 112 may contact the side walls of the bottom cover 114. Figure 2 As shown, a portion of the horizontal portion of the guide panel 112 may be in contact with a sidewall of the bottom cover 114 .

[0059] The light emitting array LA, the light guide plate LGP, and the optical sheet SH may be housed in a space formed by the bottom surface and sidewalls of the bottom cover 114, i.e., within the bottom cover 114. A transmissive region not covered by the horizontal portion of the guide panel 112 may be provided between the optical sheet SH and the display panel 111 (or the lower polarizing plate LP). Light from the backlight unit may be incident on the display panel 111 through the transmissive region.

[0060] The driving portion 130 may be disposed on the rear surface of the bottom cover 114. The driving portion 130 may be disposed on the rear surface of the display panel 111 (or the bottom cover 114) to reduce the frame area of ​​the display portion 110. When the driving portion 130 is disposed on the rear surface of the display panel 111 (or the bottom cover 114), the connection portion 150 connecting the driving portion 130 and the display panel 111 may be bent from the upper surface of the lower substrate 111a toward the rear surface of the bottom cover 114, as shown in FIG. Figure 2 In this case, the connection portion 150 may be provided to surround at least a portion of the guide panel 112. More specifically, the connection portion 150 may be connected to the display panel 111 and the driving portion 130, and surround a portion of each of the display panel 111 and the bottom cover 114, as well as the protruding guide panel 112, namely, the vertical portion 112a. Therefore, at least a portion of the connection portion 150 may overlap with the vertical portion 112a of the guide panel 112. Figure 2 , the connection portion 150 may overlap with the right surface, the upper surface, and the lower surface of the vertical portion 112 a.

[0061] The driver IC 115 is used to drive the plurality of pixels provided in the display panel 111. The driver IC 115 may drive the plurality of pixels provided in the display panel 111 based on a control signal input from the driving portion 130 through the connection portion 150. The driver IC 115 may be coupled to the display panel 111 to be adjacent to the connection portion 150. For example, Figure 2 As shown, the driving IC 115 may be coupled to the upper surface of the lower substrate 111 a between the adhesive member SL and one side of the connection portion 150 .

[0062] At least two driver ICs 115 may be provided between the adhesive member SL and the connection portion 150. When only one driver IC is provided, the size of the driver IC should be increased, whereas when two or more driver ICs are provided, the size of the driver IC may be reduced. When the size of the driver IC is reduced, the size of the frame may be reduced, and the contraction stress generated when the driver IC is attached to the display panel 111 (or the lower substrate 111a) may be reduced, thereby preventing the driver IC from being damaged or broken. This will be referred to later. Figure 12A and Figure 12B Describe this.

[0063] Return to reference Figure 2 , the driving portion 130 coupled to the rear surface of the bottom cover 114 may be provided to be flat to prevent the plurality of lines or circuits provided in the driving portion 130 from being damaged. Figure 1 The display panel 111 is bent in the second direction (Y-axis direction) to have a predetermined curvature, so that Figure 2 As shown, an external force (or stress) F may be applied in the second direction (Y-axis direction) to the connection portion 150 connecting the display panel 111 and the driving unit 130. If there is no pattern in the connection portion, when the display panel is bent, the external force (or stress) may be significantly applied to a portion of the connection portion, thereby damaging the connection portion or the display panel (or lower substrate) may be bent and torn from the upper substrate. In this case, when an image is output, light leakage may occur between the lower substrate and the upper substrate.

[0064] In the curved display device 100 according to one embodiment of the present disclosure, a portion of the connection portion 150 (or the pattern area 151) is provided with a pattern P, and a portion of the connection portion 150 is removed from the pattern P, so that an external force (or stress) F applied to one position of the connection portion 150 can be dispersed to prevent the connection portion 150 from being damaged, and the lower substrate 111a can be prevented from being torn relative to the upper substrate 111b, thereby avoiding or reducing light leakage.

[0065] For details, refer to Figures 2 to 4 , both sides of the display portion 110 may be bent based on the center line CL of the display panel 111. For example, the display portion 110 may include a first area A1 adjacent to the center line CL and a second area A2 adjacent to the first area A1. The first area A1 may be bent to have a first curvature C1, and the second area A2 may be bent to have a second curvature C2 greater than the first curvature C1. The second area A2 may be disposed closer to the edge of the display portion 110 (or the display panel 111) than the first area A1. Since the visibility of the user decreases from the center toward the edge of the display portion 110, the display portion 110 (or the display panel 111) may be bent more toward the edge of the display portion 110. Therefore, the second curvature C2 of the second area A2 may be greater than the first curvature C1 of the first area A1.

[0066] Even if the first area A1 and the second area A2 of the display portion 110 have the same curvature, as shown in FIG. Figure 4As shown, the external force (or stress) F may be greater in the second area A2 formed farther away from the driving portion 130 than the first area A1. This is because, when the display portion 110 is bent, the force pulled by the connection portion 150 in the second area A2 is greater than the force pulled by the connection portion 150 in the first area A1. In this case, the second area A2 has the same curvature as that of the first area A1 and may be defined as a region having a distance from the driving portion 130 that is greater than the distance between the first area A1 and the driving portion 130. Alternatively, the second area A2 has the same curvature as that of the first area A1 and may be defined as a region to which an external force (or stress) F greater than the external force (or stress) in the first area A1 is applied due to the bending of the display portion 110 (or display panel 111). Therefore, even when the curvature of the first area A1 and the curvature of the second area A2 are the same as each other, the pattern P can be provided in the connection portion 150 connected to the second area A2 to which a larger external force (or stress) F is applied. That is, the pattern area 151 including the pattern P can be provided in the following area of ​​the connection portion: the area to which the maximum external force (or stress) F generated by the curvature (or bending) of the display portion 110 is applied. For example, the area of ​​the connection portion to which the maximum external force (or stress) F is applied can be the area of ​​the connection portion 150 that is connected to the second area A2. Figure 3 Therefore, if Figure 2 and Figure 3 As shown, at least a portion of the pattern region 151 provided with the pattern P may overlap with the display portion 110. Therefore, in the curved display device 100 according to one embodiment of the present disclosure, the connection portion 150 may be prevented from being damaged by the pattern region 151 including the pattern P, and the display panel 111 may be prevented from being torn, thereby preventing or reducing light leakage when outputting an image.

[0067] When the display portion 110 (or the display panel 111) is bent, the connection portion 150 connected to the driving portion 130 may be bent or twisted. Figure 2 As shown. Since the connection portion 150 may be damaged when the twisted portion of the connection portion 150 contacts the corner of the bottom cover 114, the portion of the bottom cover 114 coupled to the driving portion 130 can be set to be thicker than the other portions of the bottom cover 114 not coupled to the driving portion 130, or the portion of the bottom cover 114 coupled to the driving portion 130 can protrude to be further spaced apart from the light guide plate LGP. Therefore, a predetermined space can be formed between the other side of the connection portion 150 connected to the driving portion 130 and the bottom surface of the bottom cover 114, thereby ensuring a twisting space for the connection portion 150. Therefore, even if the display portion 110 (or display panel 111) is bent so that the connection portion 150 is twisted, the connection portion 150 will not be damaged by the corner of the bottom cover 114.

[0068] Return to reference Figure 2 and Figure 3 Since the connection portion 150 is bent from the upper surface of the lower substrate 111a to the bottom surface of the bottom cover 114 and is thus connected to the display panel 111 and the driving portion 130, the connection portion 150 can be disposed to surround at least a portion of the guide panel 112. When the display panel 111 is bent to have a curvature, the connection portion 150 can also be bent together with the display panel 111, as shown in FIG. Figure 1 and Figure 3 As shown. Therefore, the connection portion 150 may have a first curvature C1 in the first area A1 and a second curvature C2 in the second area A2. The connection portion 150 provided in the second area A2 may be a pattern area 151 in which the pattern P is provided. As described above, since the external force (or stress) generated by the bending of the display panel 111 is applied to the second area A2 more than the first area A1, various patterns P may be provided in the pattern area 151 located in the second area A2.

[0069] Reference Figure 3 and Figure 4 , the ratio of the pattern area 151 in which the pattern P is provided in the connection portion 150 may be 20% or less. Since the connection portion 150 needs to transmit the control signal applied from the driving portion 130 to the display panel 111 (or the pad portion), a plurality of lines (not shown) may be provided in the connection portion 150. However, since the line cannot be provided in the pattern area 151 in which the pattern P is provided in the connection portion 150, the ratio of the pattern area 151 to the connection portion 150 is preferably not more than 20%. When the ratio of the pattern area 151 to the connection portion 150 exceeds 20%, some of the plurality of lines may not be provided, whereby the control signal of the driving portion 130 may not be fully transmitted to the display panel 111. Alternatively, some of the plurality of lines may be damaged when the pattern P is formed, whereby the control signal of the driving portion 130 may not be fully transmitted to the display panel 111. Alternatively, some of the plurality of lines may be damaged when the pattern P is formed, whereby the control signal of the driving portion 130 may not be fully transmitted to the display panel 111. Since the pattern P is an area where a portion of the connection portion 150 (or the pattern region 151) is removed, the wires may be damaged when forming the pattern P, and thus the wires are not disposed in the pattern region 151 where the pattern P is disposed. Therefore, in the curved display device 100 according to one embodiment of the present disclosure, since the ratio of the pattern region 151 occupied in the connection portion 150 is 20% or less, an area in which a plurality of wires can be disposed can be sufficiently ensured, thereby enabling the control signal of the driving portion 130 to be fully transmitted to the display panel 111.

[0070] In the curved display device 100 according to one embodiment of the present disclosure, the pattern P may be a plurality of holes H or a polygonal PG. The shape of the pattern P may vary according to the amount of change in the curvature of the pattern area 151 (or the connecting portion 150). When the display portion 110 has a curvature, the pattern area 151 may be bent at the same curvature as the curvature of the display portion 110. Therefore, the pattern area 151 may have an amount of change in curvature. The shape of the pattern P may be a concept that includes not only the shape of the pattern but also the size of the pattern P and the ratio of the pattern P occupied in the pattern area 151. Hereinafter, reference will be made to Figures 5 to 8 The pattern P is described in detail.

[0071] Figure 5 is an exemplary view showing the amount of change in curvature of a pattern area, Figure 6 is a diagram showing an example of a pattern based on an amount of change in curvature of a pattern area, Figure 7 is a view showing another example of a pattern based on the amount of change in curvature of a pattern area, and Figure 8 : is a diagram showing other examples of patterns based on the amount of change in curvature of the pattern area.

[0072] Reference Figures 5 to 8 , the shape of the pattern P may vary according to the amount of change in the curvature of the connection portion 150 . Figure 5 FIG. 1 shows an example in which the connecting portion 150 is bent at a predetermined curvature. Therefore, when the curvature of the connecting portion 150 is set to the first curvature C1 and the second curvature C2, Figure 5 The structure can also be applied to the pattern area 151 having the second curvature C2.

[0073] First, if Figure 5 As shown, compared with the case where the pattern area 151 (or the connecting portion 150) is set to be flat and not bent, when the pattern area 151 (or the connecting portion 150) is bent to have a curvature, the curvature change of the pattern area 151 (or the connecting portion 150) can be represented by the X-axis change △X and the Y-axis change △Y.

[0074] In this case, the X-axis variation ΔX and the Y-axis variation ΔY can be derived from the angle (first angle θ1 or curvature angle θ1) at which the second imaginary line BL connecting the centers of the first large alignment mark LM1 and the second large alignment mark LM2 when the pattern region 151 (or the connecting portion 150) is bent is tilted relative to the first imaginary line PL (side D) connecting the centers of the first small alignment mark SM1 and the second small alignment mark SM2 when the pattern region 151 (or the connecting portion 150) is flat. The X-axis variation ΔX and the Y-axis variation ΔY can vary based on the first angle θ1 (or curvature angle θ1). The first small alignment mark SM1 and the second small alignment mark SM2 can be squares of the same size and shape. The first large alignment mark LM1 and the second large alignment mark LM2 can be squares of the same size and shape. In this case, each of the first large alignment mark LM1 and the second large alignment mark LM2 can be configured to have a side longer than a side of the first small alignment mark SM1 or the second small alignment mark SM2. For example, the first large alignment mark LM1 can be a square larger than the first small alignment mark SM1.

[0075] When the pattern area 151 (or the connection portion 150) is set to be flat without being bent, the first small alignment mark SM1 and the second small alignment mark SM2 can be positioned parallel to the lower side of the pattern area 151 (or the connection portion 150) and can be positioned at the center between the lower side and the upper side of the pattern area 151. That is, Figure 5 The center of each of the first and second small alignment marks SM1 and SM2 may be disposed on the side D.

[0076] In more detail, when the pattern area 151 (or the connecting portion 150) is set to be flat without being bent, the lower side of the pattern area 151 (or the connecting portion 150) may coincide with side E, and the upper side of the pattern area 151 (or the connecting portion 150) may coincide with side F. The left side of the pattern area 151 (or the connecting portion 150) may coincide with side A, and the right side of the pattern area 151 (or the connecting portion 150) may coincide with side C. The vertical center side located at the center between the left and right sides of the pattern area 151 (or the connecting portion 150) may coincide with side B, and the horizontal center side located at the center between the lower and upper sides of the pattern area 151 (or the connecting portion 150) may coincide with side D.

[0077] Point a may be the center point of the first large alignment mark LM1, and point a' may be the center point of the first small alignment mark SM1. L may be the distance between points a and a'. Point b may be the vertex where the right side and the bottom side of the pattern area 151 (or the connecting portion 150) intersect. In other words, point b may be a point located at the right corner of the pattern area 151 (or the connecting portion 150).

[0078] Centers of the first and second small alignment marks SM1 and SM2 may be located on the side D. Since the pattern region 151 (or the connection portion 150 ) is provided to be flat, the side D may be parallel to the first direction (X-axis direction).

[0079] When the pattern area 151 (or the connecting portion 150) is bent to have a curvature, the side D can be tilted like the side BL. Therefore, a predetermined angle (a first angle θ1 or a curvature angle θ1) can be formed between the side D and the side BL. The center of each of the first large alignment mark LM1 and the second large alignment mark LM2 can be located on the side BL. Point c can be the point where the side BL and the side C intersect. In this case, the X-axis variation △X can be the shortest distance from point b to the side C. The Y-axis variation △Y can be the shortest distance from point b to the side E. SDL can be the horizontal distance (or shortest distance) from the center a to the side B of the first large alignment mark LM1. WL1 can be the length from the point where the side B and the side E intersect to point b. WL2 can be the length from point b to point c.

[0080] Under the above conditions, the X-axis variation ΔX and the Y-axis variation ΔY can be derived from the first angle θ1 (or the curvature angle θ1). For example, the X-axis variation ΔX can be derived from the equation cosθ1*WL2. The Y-axis variation ΔY can be derived from the equation sinθ1*WL1. The curvature angle θ1 can be derived from the equation tanθ1=L / SDL. The X-axis variation ΔX and the Y-axis variation ΔY can be derived from the above equations.

[0081] For example, when SDL is 19.3 mm, L is 0.5 mm, WL1 is 22 mm, and WL2 is 2.5 mm, 1.47° can be obtained as the first angle θ1. In this case, through the above formula, the X-axis variation ΔX can be obtained as 0.06 mm, and the Y-axis variation ΔY can be obtained as 0.56 mm. As described above, it is noted that the X-axis variation ΔX is significantly smaller than the Y-axis variation ΔY. Since the display portion 110 is bent in the second direction (Y-axis direction), the connecting portion 150 (or pattern area 151) can also be bent in the second direction (Y-axis direction), so the external force (or stress) applied in the second direction (Y-axis direction) can be greater than the external force (or stress) applied in the first direction (X-axis direction). Therefore, the Y-axis variation ΔY can be significantly greater than the X-axis variation ΔX. Therefore, the change caused by the bending of the connecting portion 150 (or the pattern region 151 ) in the second direction (Y-axis direction), that is, the curvature change, can be regarded as the Y-axis change ΔY.

[0082] Reference Figure 6 and Figure 7, when the curvature variation of the connecting portion 150 (or pattern area 151), that is, the Y-axis variation △Y of the connecting portion 150 (or pattern area 151) is 1 mm or less, the pattern P can be formed by a plurality of holes H. The plurality of holes H can be spaced apart from each other in the pattern area 151. This is to disperse the external force (or stress) F applied to the pattern area 151 in different positions (or different directions) instead of in one position (or in one direction). The reason why the pattern P is formed by circular holes is that when the pattern P is formed by a polygon, the external force (or stress) is concentrated at the corners of each pattern, which may damage the pattern P. Therefore, when the curvature variation of the connecting portion 150 (or pattern area 151) is 1 mm or less, the connecting portion 150 (or pattern area 151) can be formed by a plurality of holes H having a circular shape.

[0083] Return to reference Figure 6 , when the curvature variation of the connecting portion 150 (or the pattern region 151) is 0.5 mm or less, the diameter R1 of each of the plurality of holes H may be or larger. Figure 6 As shown, according to the curvature change of the connecting portion 150 (or the pattern area 151), the diameter is Or more holes H can be represented as H1. For example, It is a circle with a diameter of 2 mm.

[0084] Under the above conditions (such as Figure 6 In the case of the condition shown in FIG1 , the ratio of the plurality of holes H1 to the entire size of the pattern area 151 may be 50% or less. That is, when the curvature change amount of the connecting portion 150 (or the pattern area 151) is not large, the diameter of each of the plurality of holes H1 may be set to As the curvature variation of the connection portion 150 (or the pattern region 151) becomes smaller, the external force (or stress) applied to each of the plurality of holes H1 becomes smaller, so that the diameter R1 of each of the plurality of holes H1 can be increased to or larger, and multiple holes H1 with large diameters can be sparsely arranged to disperse external forces (or stresses). Therefore, the external forces (or stresses) applied to the connection portion 150 can be dispersed throughout the pattern area 151 (or the connection portion 150) through the multiple holes H1, rather than being concentrated in one location. Therefore, the display panel 111 can be prevented from being torn due to the external force (or stress) F, thereby preventing light leakage when outputting images. In addition, damage to the connection portion 150 due to the external force (or stress) F can be avoided.

[0085] exist Figure 6In the embodiment, the pattern area 151 may refer to an area excluding the first adhesive area DA1 and the second adhesive area DA2 from the connection portion 150 provided in the second area A2. Figure 2 and Figure 6 , the first bonding area DA1 may refer to an area where the connection portion 150 is coupled to the lower substrate 111a. Areas adjacent to each other in the first direction (X-axis direction) in the first bonding area DA1 may be areas where the lines of the connection portion 150 to be connected to the pad portion of the lower substrate 111a are exposed. The second bonding area DA2 may refer to an area where the connection portion 150 is coupled to the driving portion 130. Areas adjacent to each other in the first direction (X-axis direction) in the second bonding area DA2 may be areas where the lines of the connection portion 150 to be connected to the driving portion 130 and / or the lines of the circuit of the driving portion 130 are exposed. Therefore, in Figure 6 , the pattern area 151 may be an area excluding the first adhesive area DA1 and the second adhesive area DA2 from the connection part 150 provided in the second area A2.

[0086] Figure 7 Another example of pattern P is shown. Figure 7 When the curvature variation of the connecting portion 150 (or the pattern region 151) exceeds 0.5 mm and is less than or equal to 1 mm, the diameter R2 of each of the plurality of holes H may be less than like Figure 7 As shown, according to the curvature variation of the connecting portion 150 (or the pattern area 151), the diameter is smaller than The plurality of holes H can be represented as H2.

[0087] Under the above conditions (such as Figure 7 In the case of the condition shown in FIG, the ratio of the plurality of holes H2 to the entire size of the pattern area 151 may exceed 50%. That is, when the curvature change of the connecting portion 150 (or the pattern area 151) is greater than Figure 6 When the curvature variation is less than Since the external force (or stress) applied to each of the plurality of holes H2 increases with the increase in the amount of change in the curvature of the connecting portion 150 (or the pattern area 151), the diameter R2 of each of the plurality of holes H2 can be reduced to less than Furthermore, the multiple holes H2 having small diameters can be arranged more densely to better disperse external forces (or stresses). Therefore, the external forces (or stresses) applied to the connection portion 150 can be dispersed into the pattern area 151 (or the connection portion 150) through the multiple holes H2, rather than being concentrated in one location. Therefore, the display panel 111 can be prevented from being torn due to the external force (or stress) F, thereby preventing light leakage when outputting images. Furthermore, damage to the connection portion 150 due to the external force (or stress) F can be avoided.

[0088] For ease of description, Figures 6 to 8 FIG. 1 shows that the connection portion 150 is provided to be flat rather than inclined, so that the lower surface of the connection portion 150 can be provided in parallel with the first direction (X-axis direction). Figure 6 and Figure 7 , the plurality of holes H may be arranged in a zigzag pattern along a first direction (X-axis direction) and / or a second direction (Y-axis direction) intersecting the first direction (X-axis direction) within the pattern region 151. In this case, the zigzag pattern may refer to a direction that is not parallel to the direction in which the external force (or stress) F is applied.

[0089] The reason for arranging the plurality of holes H in a zigzag pattern is that the external force (or stress) F can be more dispersed than when the plurality of holes are arranged parallel to (or in line with) the external force (or stress) F. For example, when the plurality of holes are arranged parallel to the stress, the plurality of holes are closely arranged in the direction in which the external force (or stress) F is applied, making it more likely that the connection portion 150 will be torn or damaged. Therefore, in the curved display device 100 according to one embodiment of the present disclosure, the plurality of holes H provided in the pattern region 151 of the connection portion 150 can be arranged in a zigzag pattern, so that the external force (or stress) F can be more dispersed throughout the pattern region 151, thereby further preventing damage to the connection portion 150 and thus further improving reliability.

[0090] In addition, when the pattern P is formed by a plurality of holes H, the plurality of holes H may be as follows: Figure 4 As shown, the plurality of holes H are provided at a position spaced apart from a side constituting the connection portion 150 (or the pattern region 151) by a predetermined distance. When the plurality of holes H are provided adjacent to a side constituting the connection portion 150 (or the pattern region 151) or are formed in the connection portion 150 (or the pattern region 151) in a shape that does not constitute a circular shape, and when an external force (or stress) is generated, the external force (or stress) may be concentrated on at least one hole H to affect the other adjacent holes H, so that the entire plurality of holes H may not be able to disperse the force. Therefore, the curved display device 100 according to one embodiment of the present disclosure may have a structural feature in which, when the pattern P is formed by the plurality of holes H, the plurality of holes H are provided at a side (for example, Figure 6At a position spaced a predetermined distance apart from the left side of the pattern area 151 in FIG.

[0091] Reference Figure 8 When the curvature variation of the connecting portion 150 (or pattern region 151), that is, the Y-axis variation ΔY of the connecting portion 150 (or pattern region 151) exceeds 1 mm, the pattern P can be formed by the polygon PG. This is because Figure 8 The Y-axis change △Y is greater than Figure 6 The Y-axis change △Y, so that the Figure 8 The external force (or stress) F in the pattern area 151 can be greater than Figure 6 The external force in the structure is reduced, and the pattern of polygonal PG rather than multiple holes H can better disperse the external force (or stress) F.

[0092] Under the above conditions (such as Figure 8 ), the ratio of the pattern of the polygonal PG in the entire size of the pattern area 151 can be 80% or greater. That is, when the curvature change of the connecting portion 150 (or the pattern area 151) is large, the external force (or stress) F is applied significantly, so that the ratio of the pattern of the polygonal PG in the size of the pattern area 151 can be 80% or greater. Therefore, the external force (or stress) applied to the connecting portion 150 can be dispersed to the entire pattern area 151 through the pattern of the polygonal PG, rather than being concentrated in one position. Therefore, the display panel 111 can be prevented from being torn due to the external force (or stress) F, thereby avoiding or reducing light leakage when outputting an image. In addition, damage to the connecting portion 150 due to the external force (or stress) F can be avoided.

[0093] As mentioned above, in Figure 8 In the embodiment, the pattern area 151 may refer to an area excluding the first and second adhesive areas DA1 and DA2 from the connection portion 150 disposed in the second area A2. A polygonal pattern PG may be formed in the pattern area 151 disposed between the first and second adhesive areas DA1 and DA2.

[0094] According to one example, the pattern of the polygonal PG may be a trapezoidal TRZ. Figure 8 As shown in FIG, the trapezoidal TRZ may be configured such that its width decreases from one end of the connection portion 150 (or pattern region 151) toward the center of the connection portion 150 (or pattern region 151). In more detail, the trapezoidal TRZ may include an inner side IL close to the center of the connection portion 150 (or pattern region 151) and oblique sides CNL connected to both sides of the inner side IL. Figure 8As shown, the inner side IL and the oblique side CNL may form a second angle θ2 (or pattern angle θ2), and the second angle θ2 may be an obtuse angle greater than a right angle. Compared to a case where the second angle θ2 is a right angle or an acute angle, when the second angle θ2 is set at an obtuse angle, the trapezoidal TRZ pattern P can better disperse the external force (or stress) F without being torn or damaged by the external force (or stress) F. Therefore, when the Y-axis variation ΔY of the connection portion 150 (or pattern area 151) exceeds 1 mm, the curved display device 100 according to one embodiment of the present disclosure may have a polygonal shape PG in the connection portion 150, for example, a trapezoidal TRZ pattern P with an obtuse pattern angle. This allows the external force (or stress) to be dispersed rather than concentrated in one location, thereby preventing damage to the connection portion 150.

[0095] In the curved display device 100 according to one embodiment of the present disclosure, since the external force (or stress) can be dispersed to the entire pattern area 151 (or the entire connecting portion 150) through the pattern P, instead of being concentrated on the pattern area 151 of the connecting portion 150, the force pulling in the direction opposite to the direction in which the display portion 110 (or the display panel 111) is bent can be reduced compared to the case where the external force is relatively concentrated on one position. Therefore, the display portion 110 (or the display panel 111) is not torn, and thus light leakage does not occur when an image is output. A position may refer to a virtual external force line generated at a portion where the interval between the bent display portion 110 (or the display panel 111) and the flat driving portion 130 is the longest when the display portion 110 (or the display panel 111) is bent. For example, referring to Figure 4 , one position may be a virtual external force line connecting the pattern P located at the outer edge (or end) in the pattern area 151 of the connection portion 150 and the driving portion 130 at the shortest distance. In this case, the outer edge (or end) may refer to the end of the pattern area 151 in the direction from the first area A1 to the second area A2. The outer edge (or end) may be based on Figure 4 The left side of the connecting portion 150.

[0096] In addition, when the pattern P is formed by the polygon PG, the polygon PG may be arranged to communicate with the outside, such as Figure 8 As shown. Since the Y-axis variation △Y of the connecting portion 150 (or pattern area 151) exceeds 1mm, the external force (or stress) applied to the connecting portion 150 (or pattern area 151) is large, causing the pattern area 151 (or connecting portion 150) adjacent to the pattern PG to partially deform to reduce the external force (or stress). For example, when Figure 8When the Y-axis variation ΔY of the middle connection portion 150 (or pattern region 151) exceeds 1 mm, the pattern region 151 located on the upper side and adjacent to the pattern PG may deform to bend upward, while the pattern region 151 located on the lower side may deform to bend downward, thereby alleviating external force (or stress). In this case, the second angle θ2 (or pattern angle θ2) can be greater than the angle before the pattern region 151 deforms, and the width between the hypotenuse CNL can be further increased. Therefore, when the pattern P is formed by the polygonal shape PG, the curved display device 100 according to one embodiment of the present disclosure can have a structural feature in which the pattern P is formed in the connection portion 150 (or pattern region 151) to have a shape that is connected to the outside, that is, a shape in which one side of the polygon is open.

[0097] In the curved display device 100 according to one embodiment of the present disclosure, patterns P having various shapes and ratios can be provided in the connection portion 150 (or pattern region 151) to reduce or disperse external forces (or stresses) generated by the bending (or curvature) of the display portion 110 (or display panel 111). Therefore, the curved display device 100 according to one embodiment of the present disclosure can improve versatility with respect to curved display panels having various curvatures.

[0098] In addition, the connection portion 150 may be connected to the display panel 111 and the driving portion 130 and surround a portion of each of the display panel 111 and the bottom cover 114, for example, a portion of the upper surface of the lower substrate 111a and a portion of the lower surface of the bottom cover 114 and the protruding guide panel 112a (or the vertical portion 112a). Figure 2 As shown, at least a portion of the pattern P provided in the connection portion 150 (or the pattern region 151) may overlap with the guide panel 112a (or the vertical portion 112a of the guide panel 112) protruding from the side of the display panel 111. Figure 2 The pattern P may overlap at least a portion of the right side, upper surface, or lower surface of the vertical portion 112a. When the pattern P is formed by the polygon PG, most of the polygon PG pattern may overlap the right side of the vertical portion 112a, which is set to be flat and relatively less bent.

[0099] In the following, reference will be made to Figures 9A to 11B A case where the connection portion 150 provided with the pattern P reduces external force (or stress) generated by bending of the display portion 110 (or the display panel 111 ) will be described.

[0100] Figure 9A is a view showing a comparative example in which a general connection portion having no pattern is rotated by up to 2° based on the Z axis, Figure 9B It is shown in Figure 9A A graph comparing the stress transmitted to the display panel in a general connection portion and the stress transmitted to the display panel in the connection portion of the present disclosure under the conditions of FIG. Figure 10A is a view showing a comparative example in which a general connection portion having no pattern is rotated by up to 0.001° based on the Y axis, Figure 10B It is shown in Figure 10A A graph comparing the stress transmitted to the display panel in a general connection portion and the stress transmitted to the display panel in the connection portion of the present disclosure under the conditions of FIG. Figure 11A is a view showing black uniformity of a curved display device when a general connection portion having no pattern has a curvature, and Figure 11B is a view illustrating black uniformity of a curved display device according to one embodiment of the present disclosure.

[0101] Figure 9A and Figure 10A : is a view showing a general connection portion without a pattern rotated based on the Y axis or the Z axis. For ease of description, Figure 9A and Figure 10A The display panel, the driving portion, and the connecting portion are shown arranged in a line along the Z-axis direction. Figure 9B and Figure 10B It shows that according to Figure 9A and Figure 10A FIG. 1 is a graph comparing the external force (or stress) transmitted to the display panel 111 (or the lower substrate 111 a ) in a general connection portion 150 having no pattern and the connection portion 150 of the present disclosure under each condition in FIG.

[0102] First, if Figure 9A As shown in FIG. 1 , when a general connection portion without a pattern is rotated up to 2° based on the Z axis, the external force (or stress) may be greatest on both sides of the general connection portion. This is because the distortion may be greatest at the position farthest from the rotation axis. In this case, as shown in FIG. Figure 9B As shown, in the case of a general connection portion (Ref), an external force (or stress) of about 8.8 MPa is transmitted from the connection portion to the display panel. On the other hand, in the case of the connection portion 150 provided with the pattern P of the present disclosure (PA), an external force (or stress) of about 8 MPa is transmitted from the connection portion 150 to the display panel 111. This may mean that the external force (or stress) transmitted to the display panel 111 is reduced by up to about 9% according to the rotation of the connection portion 150. Therefore, when the connection portion is rotated by up to 2° based on the Z axis, in the case where the connection portion 150 is provided with the pattern P, the external force (or stress) applied to the display panel 111 is smaller than in the general case where the connection portion does not have a pattern, so that the display panel 111 can be prevented from being torn, thereby preventing light leakage from occurring when outputting an image.

[0103] Next, if Figure 10A As shown in FIG. 1 , when a general connection portion without a pattern is rotated by up to 0.001° based on the Y axis, the external force (or stress) may be greatest on both sides of the general connection portion. This is because the distortion may be greatest at the position farthest from the rotation axis. In this case, as Figure 10B As shown, in the case of a general connection portion (Ref), an external force (or stress) of about 0.1 MPa is transmitted from the connection portion to the display panel. On the other hand, in the case of the connection portion 150 provided with the pattern P of the present disclosure (PA), an external force (or stress) of 0 MPa, that is, no external force (or stress) is transmitted from the connection portion 150 to the display panel 111. This may mean that the external force (or stress) transmitted to the display panel 111 is reduced by up to 100% according to the rotation of the connection portion 150. Therefore, when the connection portion is rotated by up to 0.001° based on the Y axis, in the case where the connection portion 150 is provided with the pattern P as in the present disclosure, the external force (or stress) is not transmitted to the display panel 111, so that the display panel 111 can be prevented from being torn, thereby preventing light leakage from occurring when outputting an image.

[0104] When the display panel and the driving part are connected to each other by a general connection part without a pattern and a bend occurs in the display panel, the general connection part may also bend (or rotate) to have a curvature. In this case, as described above, external force (or stress) may be transmitted to the display panel, and light leakage may occur, such as Figure 11A As shown in Figure 1. Light leakage LL can be identified by measuring black uniformity. Figure 11A As shown in the figure, when measuring black uniformity, light leakage LL may appear as red dots. Figure 11A In the case of , the black uniformity may have a low value of about 56.6%.

[0105] On the other hand, when the display panel 111 and the driving part 130 are connected to each other through the connection part 150 provided with the pattern P and the display panel 111 is bent like the curved display device 100 according to one embodiment of the present disclosure, Figure 11B As shown in FIG. 1 , light leakage does not occur in the display portion DP. Figure 11B In this case, the black uniformity can have a high value of about 73.95%, and thus, it is noted that the black uniformity of the display part DP of the present disclosure is improved by as much as about 30% compared to the black uniformity of the display part DP provided with a general connection part without a pattern.

[0106] Furthermore, the inventors of the curved display device 100 according to one embodiment of the present disclosure tested the tension of external forces applied to a general connection portion without a pattern and a connection portion 150 provided with a pattern P. The results showed that the general connection portion without a pattern exhibited a tension of approximately 7.0 N, while the connection portion 150 provided with a pattern P according to the present disclosure exhibited a tension of approximately 15.4 N. This indicates that the tension of the connection portion 150 provided with the pattern P was further improved by approximately 120% compared to the tension of the general connection portion without a pattern. This may mean that the connection portion 150 provided with the pattern P can better disperse external forces (or stress) than the general connection portion without a pattern, thereby preventing damage to the connection portion 150 and / or damage to the display panel 111.

[0107] Therefore, in the curved display device 100 according to one embodiment of the present disclosure, the driving portion 130 and the display panel 111 are connected to each other by a connecting portion 150 provided with a pattern P, so that the external force (or stress) generated by the bending of the display panel 111 can be dispersed through the pattern P to prevent the display panel 111 from being torn, thereby avoiding light leakage.

[0108] Figure 12A is a view showing stress applied to the display panel when only one driver IC is provided, and Figure 12B is a view illustrating stress applied to a display panel in a curved display device according to one embodiment of the present disclosure.

[0109] The curved display device 100 according to one embodiment of the present disclosure may include at least two driving ICs 115 between the adhesive member SL and the connection portion 150 .

[0110] When only one driver IC is provided, Figure 12A As shown, the size of the driver IC D1 is increased to transmit various image signals to the display panel. The driver IC can be attached to the display panel (or lower substrate) by an adhesive ACF, and then pressed over the driver IC by high temperature and high pressure, and attached to the display panel (or lower substrate). However, when the size of the driver IC D1 is large, since the contraction stress F1 of the driver IC increases during cooling, the expansion stress F1' may increase toward the edge of the lower substrate GL1, whereby the lower substrate GL1 may bend significantly. That is, the lower substrate GL1 may be bent to have a small curvature. In this case, the lower substrate GL1 may be torn from the upper substrate (not shown), whereby light leakage may occur when outputting an image.

[0111] In contrast, when at least two driver ICs 115 are provided like the curved display device 100 according to one embodiment of the present disclosure, since the image signal can be divided and transmitted to the display panel by two or more driver ICs, the size of the driver IC D2 can be reduced. Figure 12B As shown, since the contraction stress F2 of the driver IC is small during the cooling period of the driver IC D2, the expansion stress F2' decreases toward the edge of the lower substrate GL2 (111a), so the lower substrate GL2 will not be bent significantly. That is, the lower substrate GL2 (111a) can be bent to have a greater Figure 12A The curvature of is large. Therefore, Figure 12B In this case, the lower substrate GL2 is not torn relative to the upper substrate (not shown), and thus light leakage does not occur when outputting an image.

[0112] Therefore, providing at least two driver ICs 115 in the curved display device 100 according to one embodiment of the present disclosure makes it possible to reduce the size of each driver IC 115, thereby further preventing the display panel 111 from being damaged (or torn), and thus light leakage does not occur when outputting an image.

[0113] According to the present disclosure, the following advantageous effects can be obtained.

[0114] In the present disclosure, since the pattern area having a predetermined pattern is provided in the connection portion connecting the display portion and the driving portion, even if the display panel is bent to have a curvature, the external force (or stress) generated by the bending can be dispersed to prevent the display panel from being damaged.

[0115] Furthermore, in the present disclosure, since the size and ratio of the pattern vary according to the curvature of the display part, versatility for curved display panels having various curvatures can be improved.

[0116] It will be apparent to those skilled in the art that the present disclosure is not limited to the above-described embodiments and drawings, and that various substitutions, modifications, and variations may be made in the present disclosure without departing from the spirit or scope of the present disclosure. Accordingly, the scope of the present disclosure is defined by the appended claims, and it is intended that all variations or modifications derived from the meaning, scope, and equivalents of the claims fall within the scope of the present disclosure.

Claims

1. A curved display device, comprising: a display portion having a first curvature and a second curvature greater than the first curvature; a driving unit for driving the display unit; as well as a connecting portion connecting the driving portion and the display portion, The connecting portion includes a patterned area provided between the display portion having the second curvature and the driving portion. wherein the pattern area has the second curvature and includes a curvature variation based on the second curvature, and In the case where the amount of change in curvature is 1 mm or less, the pattern includes a plurality of holes, and in the case where the amount of change in curvature exceeds 1 mm, the pattern includes a polygon.

2. The curved display device according to claim 1, wherein: The pattern area occupies a ratio of 20% or less in the connecting portion.

3. The curved display device according to claim 1, wherein: The plurality of holes are arranged in a zigzag pattern within the pattern area in a first direction and / or a second direction intersecting the first direction.

4. The curved display device according to claim 1, wherein: In the case where the curvature variation is 0.5 mm or less, the diameter of each of the plurality of holes is or greater, and Diameter or larger, the ratio of the plurality of holes occupied in the pattern area is 50% or less, Represents a circle with a diameter of 2 mm.

5. The curved display device according to claim 1, wherein: In the case where the curvature variation exceeds 0.5 mm and is less than or equal to 1 mm, the diameter of each of the plurality of holes is less than and Diameter smaller than The ratio of the plurality of holes in the pattern area exceeds 50%, Represents a circle with a diameter of 2 mm.

6. The curved display device according to claim 1, wherein: The polygonal pattern occupies 80% or more of the pattern area.

7. The curved display device according to claim 1, wherein: The polygon is a trapezoid, and The trapezoid is provided such that a width of the trapezoid gradually decreases from an end portion of the connection portion toward a center of the connection portion.

8. The curved display device according to claim 1, wherein: The polygon is a trapezoid, The trapezoid includes an inner side close to the center of the connecting portion and a hypotenuse connected to the inner side, and The angle formed by the inner side and the hypotenuse is an obtuse angle.

9. The curved display device according to claim 1, wherein: The display unit includes a display panel that outputs an image and a guide panel that supports the display panel, the guide panel partially protruding from a side surface of the display panel, and At least a portion of the pattern overlaps with the protruding guide panel.

10. The curved display device according to claim 9, wherein: The display portion further includes an impact buffer disposed between the display panel and the guide panel.

11. The curved display device according to claim 9, wherein: The display portion further includes a bottom cover located on a rear surface of the display panel, the bottom cover supporting the guide panel. The driving portion is provided on the rear surface of the bottom cover, and The connection part is connected to the display panel and the driving part, and surrounds a portion of each of the display panel and the bottom cover and the protruding guide panel.

12. The curved display device according to claim 9, wherein: The display portion includes at least two driver ICs coupled to the display panel to be adjacent to the connection portion.

13. A curved display device, comprising: a display portion having a curvature; a driving unit for driving the display unit; as well as a connecting portion connecting the driving portion and the display portion, The connecting portion includes a patterned area having a pattern and disposed between the display portion having the curvature and the driving portion. wherein the pattern region includes a curvature variation based on the curvature of the display portion, and In the case where the amount of change in curvature is 1 mm or less, the pattern includes a plurality of holes, and in the case where the amount of change in curvature exceeds 1 mm, the pattern includes a polygon.

14. The curved display device according to claim 13, wherein: The pattern area is provided in an area of ​​the connection portion to which a maximum external force based on the curvature of the display portion is applied.

15. The curved display device according to claim 13, wherein: At least a portion of the pattern area overlaps with the display portion.

16. The curved display device according to claim 13, wherein: In the case where the curvature variation of the pattern area is 0.5 mm or less, the diameter of each of the plurality of holes is or larger, and with a diameter of or larger, the ratio of the plurality of holes occupied in the pattern area is 50% or less, In the case where the curvature variation of the pattern area exceeds 0.5 mm and is less than or equal to 1 mm, the diameter of each of the plurality of holes is less than and the diameter is smaller than The ratio of the plurality of holes in the pattern area exceeds 50%, Represents a circle with a diameter of 2 mm.

17. A curved display device, comprising: a display portion including a first region having a first curvature and a second region having a second curvature, a driving unit for driving the display unit; as well as a connecting portion connecting the driving portion and the display portion, wherein the distance between the second region and the driving portion is greater than the distance between the first region and the driving portion, The connecting portion includes a patterned area disposed between the second area and the driving portion. The shape of the pattern changes according to the amount of change in the curvature of the pattern area.

Images