Display device

Abstract

A display device is provided. A display device according to an exemplary embodiment of the inventive concept includes a first substrate, a second substrate, a sealant, and a stack, wherein the first substrate includes a display area and a non-display area, the second substrate overlaps the first substrate, the sealant is arranged between the first substrate and the second substrate, and the stack is arranged between the first substrate and the second substrate, the stack is arranged on the outermost edge of the non-display area, and the stack is arranged to be spaced apart from the sealant, wherein the stack includes a columnar spacer and a color filter stack in which at least two color filters are stacked.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0103026, filed on August 22, 2019, in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a display device, and in particular, to a display device for controlling a residue layer in a display device having a lateral side to which a pad portion is attached. Background Art

[0004] Generally, when manufacturing a display panel, a circuit board is connected to the display panel. For example, the circuit board is mounted on the display panel using a tape automated bonding (TAB) method using an anisotropic conductive film (ACF) as an adhesive layer.

[0005] Recently, design solutions on display panels for reducing the border area (or non-display area) have been studied in various ways. For example, methods for bonding a circuit board to the lateral side of a display panel have been tried. In order to attach the circuit board to the lateral side of the display panel, a process for grinding the lateral side of the display panel is required.

[0006] The above information disclosed in this Background section is only for enhancement of understanding of the background of the inventive concept and therefore it may contain information that does not form the prior art that is already known in this country by a person of ordinary skill in the art. Summary of the invention

[0007] The present inventive concept has been made in an effort to provide a display device for controlling formation of a residue layer in a display device having a lateral side to which a pad portion is attached.

[0008] An exemplary embodiment of the inventive concept provides a display device, which includes a first substrate, a second substrate, a sealant and a stack, wherein the first substrate includes a display area and a non-display area, the second substrate overlaps the first substrate, the sealant is arranged between the first substrate and the second substrate, and the stack is arranged between the first substrate and the second substrate, the stack is arranged on the outermost edge of the non-display area, and the stack is arranged to be separated from the sealant, wherein the stack includes a columnar spacer and a color filter stack in which at least two color filters are stacked.

[0009] The color filter stack may include a first color filter and a second color filter overlapping each other in a plan view, and the first color filter may be arranged closer to the first substrate than the second color filter.

[0010] When the first color filter is red, the second color filter may be green or blue, and when the first color filter is green, the second color filter may be blue.

[0011] The color filter stack may include a first color filter, a second color filter, and a third color filter.

[0012] An area of ​​the second color filter may be greater than an area of ​​the first color filter, and a top surface and a side surface of the first color filter may be completely covered by the second color filter.

[0013] An area of ​​the first color filter may correspond to an area of ​​the second color filter.

[0014] An area of ​​the second color filter may be smaller than an area of ​​the first color filter.

[0015] The space between the sealant and the stack may be filled with air.

[0016] The stack may further include a gate conductive layer and a data conductive layer disposed between the first substrate and the color filter stack, and the gate conductive layer may be in direct contact with the data conductive layer.

[0017] The display device may further include a pad portion disposed on a lateral side of the stacked body and in contact with the gate conductive layer and the data conductive layer on the lateral side.

[0018] The stacked body may further include a light blocking layer disposed on the second substrate and a second electrode disposed on the light blocking layer.

[0019] The column spacers and lateral sides of the color filter stack may be exposed on the outermost edges.

[0020] The thickness of the column spacer in the non-display area may be equal to or smaller than the thickness of the column spacer in the display area.

[0021] The thickness of the color filter in the non-display area is equal to or smaller than the thickness of the color filter in the display area.

[0022] Another embodiment of the inventive concept provides a display device, which includes a first substrate, a second substrate, a sealant and a stack, wherein the first substrate includes a display area and a non-display area, the second substrate overlaps the first substrate, the sealant is arranged between the first substrate and the second substrate, and the stack is arranged between the first substrate and the second substrate, the stack is arranged on the outermost edge of the non-display area, and the stack is arranged to be separated from the sealant, wherein the stack includes a color filter stack including a first color filter and a second color filter, an organic layer and a columnar spacer.

[0023] The organic layer may be disposed between the color filter stack and the column spacer.

[0024] An area of ​​the second color filter may be greater than an area of ​​the first color filter, and a top surface and a side surface of the first color filter may be completely covered by the second color filter.

[0025] An area of ​​the first color filter may correspond to an area of ​​the second color filter.

[0026] An area of ​​the second color filter may be smaller than an area of ​​the first color filter.

[0027] The color filter stack may further include a third color filter disposed on the second color filter.

[0028] The stack may further include a gate conductive layer and a data conductive layer disposed between the first substrate and the color filter stack, and the gate conductive layer may be in direct contact with the data conductive layer.

[0029] The display device may further include a pad portion disposed on a lateral side of the stacked body and in contact with the gate conductive layer and the data conductive layer on the lateral side.

[0030] Another embodiment of the inventive concept provides a display device, which includes a first substrate, a second substrate, a sealant, a stack and a residue layer, wherein the first substrate includes a display area and a non-display area, the second substrate overlaps the first substrate, the sealant is arranged between the first substrate and the second substrate, and the stack is arranged between the first substrate and the second substrate, the stack is arranged on the outermost edge of the non-display area, the stack is arranged to be separated from the sealant, and the residue layer is arranged between the stack and the first substrate, wherein the stack includes a color filter stack including a first color filter and a second color filter and a columnar spacer.

[0031] The residue layer may include copper.

[0032] The stack may further include a gate conductive layer and a data conductive layer disposed between the first substrate and the color filter stack, and the gate conductive layer may be in direct contact with the data conductive layer.

[0033] The residue layer may be disposed between the gate conductive layer and the first substrate.

[0034] The display device may further include a pad portion disposed on a lateral side of the stacked body and contacting the residue layer, the gate conductive layer, and the data conductive layer on the lateral side.

[0035] An area of ​​the second color filter may be greater than an area of ​​the first color filter, and a top surface and a side surface of the first color filter may be completely covered by the second color filter.

[0036] An area of ​​the first color filter may correspond to an area of ​​the second color filter.

[0037] An area of ​​the second color filter may be smaller than an area of ​​the first color filter.

[0038] The color filter stack may further include a third color filter disposed on the second color filter.

[0039] According to example embodiments, a display device for controlling formation of a residue layer in a display device having a lateral side to which a pad portion is attached is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A cross-sectional view of a display device according to an exemplary embodiment of the inventive concept is shown.

[0041] Figure 2 The display area and non-display area of ​​the display panel are shown.

[0042] Figure 3 A display device is shown having lateral sides on which solder pads are disposed.

[0043] Figure 4 A display device according to a comparative example of the concept of the present invention is shown. Figure 1 Same cross section.

[0044] Figure 5 A cross-sectional view of a display device undergoing testing to establish a relationship between the area of ​​a residue layer and the distance between a first display panel and a second display panel is shown.

[0045] Figure 6 An image is shown when the lateral side is ground by changing the distance between the first display panel and the second display panel.

[0046] Figure 7 Results of measuring the height of a stack of the first color filter layer and the second color filter layer during changes in the areas of the first color filter layer and the second color filter layer are shown.

[0047] Figure 8 Another exemplary embodiment of the present invention is shown. Figure 1 Same cross section.

[0048] Fig. 9 Another exemplary embodiment of the present invention is shown. Figure 1 Same cross section.

[0049] Fig.10 Another exemplary embodiment of the present invention is shown. Figure 1 Same cross section.

[0050] Fig.11 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Figure 1 Same cross section.

[0051] Fig.12 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Figure 8 Same cross section.

[0052] Fig.13 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Fig. 9 Same cross section.

[0053] Fig.14 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Fig.10 Same cross section.

[0054] Fig.15 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Figure 1 Same cross section.

[0055] Fig.16 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Figure 8 Same cross section.

[0056] Fig.17 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Fig. 9 Same cross section.

[0057] Fig.18 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Fig.10 Same cross section.

[0058] Fig.19 A layout diagram of a display device according to an exemplary embodiment of the inventive concept is shown.

[0059] Fig. 20 Show Fig.19 A cross-sectional view of a display device relative to line XX-XX'. DETAILED DESCRIPTION

[0060] Hereinafter, the inventive concept will be described more fully with reference to the accompanying drawings showing exemplary embodiments of the inventive concept. It should be understood by those skilled in the art that the described embodiments may be modified in various different ways without departing from the spirit or scope of the inventive concept.

[0061] The drawings and description are to be regarded as illustrative in nature and not restrictive, and like reference numerals refer to like elements throughout the specification.

[0062] The sizes and thicknesses of the various configurations shown in the drawings are arbitrarily shown for better understanding and ease of description, and the inventive concept is not limited thereto. In the drawings, the thicknesses of layers, films, panels, regions, etc. are exaggerated for clarity. For better understanding and ease of description, the thicknesses of some layers and regions are exaggerated.

[0063] It should be understood that when an element such as a layer, film, region or substrate is referred to as being "on" another element, the element may be directly on the other element, or there may be an intermediate element. Conversely, when an element is referred to as being "directly" "on" another element, there is no intermediate element. In addition, in this specification, the term "on" or "above" means being positioned on or below an object portion, and does not inherently mean being positioned on the upper side of an object portion based on the direction of gravity.

[0064] Unless explicitly described to the contrary, the word “comprise” and variations such as “comprises” or “comprising” will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

[0065] The phrase "in plane" means observing an object part from the top, and the phrase "in cross section" means observing a vertically cut cross section of the object part from the side.

[0066] A display device according to exemplary embodiments of the inventive concept will now be described in detail with reference to the accompanying drawings.

[0067] Figure 1 2 is a cross-sectional view showing a display device according to an exemplary embodiment of the inventive concept. Figure 1 , the present invention concept relates to the structure of a non-display area NDA of a display device.

[0068] Figure 2 A display area DA and a non-display area NDA of the display panel 1000 are shown. Figure 1 Shows relative to Figure 2 Cross-sectional view along line II'.

[0069] Reference Figure 1 , the display device according to the present exemplary embodiment includes a first display panel 100 and a second display panel 200. A sealant 510 is disposed between the first display panel 100 and the second display panel 200. Each display panel will now be described in detail.

[0070] The first display panel 100 includes a first substrate 110. A gate conductive layer 120 disposed on the same layer as the gate line of the display area DA is provided on the first substrate 110. The gate conductive layer 120 is formed by the same process as the gate line of the display area DA, and it may include the same material as the gate line of the display area DA. Therefore, the thickness of the gate conductive layer 120 may correspond to the thickness of the gate line of the display area DA.

[0071] A data conductive layer 170 disposed on the same layer as the data line of the display area DA is disposed on the gate conductive layer 120. The data conductive layer 170 is formed by the same process as the data line of the display area DA and may include the same material as the data line of the display area DA.

[0072] The gate conductive layer 120 may directly contact the data conductive layer 170. Therefore, it will be described in detail that when the pad part is attached to the lateral side of the display panel 1000, the contact area of ​​the pad part may be increased and the resistance may be reduced.

[0073] A color filter stack 235 is disposed on the data conductive layer 170. Figure 1 , the color filter stack 235 may include a first color filter layer 231 and a second color filter layer 232 .

[0074] The first color filter layer 231 may be formed by the same process as the color filter disposed in the display area DA. The first color filter layer 231 may be a green color filter or a red color filter.

[0075] The second color filter layer 232 is disposed on the first color filter layer 231. Figure 1 , the area of ​​the second color filter layer 232 may be larger than the area of ​​the first color filter layer 231, and as Figure 1 As shown in , the second color filter layer 232 may be disposed to completely cover the top surface and the side surface of the first color filter layer 231. In this specification, the area refers to the area of ​​a surface parallel to the first substrate 110.

[0076] The second color filter layer 232 may be a green color filter or a blue color filter. When the first color filter layer 231 is a red color filter, the second color filter layer 232 may be a green color filter or a blue color filter. When the first color filter layer 231 is a green color filter, the second color filter layer 232 may be a blue color filter.

[0077] Figure 1 The configuration in which the first color filter layer 231 is completely covered by the second color filter layer 232 is shown, but the shapes of the first color filter layer 231 and the second color filter layer 232 are not limited to Figure 1The shapes shown in FIG. 1 and FIG. 2 can be modified in various ways. The modified exemplary embodiments will be described in the following part of this specification.

[0078] Reference Figure 1 , an organic layer 180 is disposed on the second color filter layer 232. The organic layer 180 may be the same layer as the passivation layer disposed between the color filter and the pixel electrode in the display area DA. The passivation layer of the display area DA will be described later in this specification.

[0079] The second display panel 200 will now be described. The second substrate 210 has a light blocking layer 220 disposed thereon.

[0080] A second electrode 270 is disposed on the light blocking layer 220. The second electrode 270 in the non-display area NDA is connected to the second electrode 270 disposed in the display area DA and is formed as one body.

[0081] A sealant 510 is disposed between the first display panel 100 and the second display panel 200. The sealant 510 fills the space between the first display panel 100 and the second display panel 200 and prevents moisture or foreign matter from entering the display area DA from the outside. The column spacer 520 is separated from the sealant 510 and is disposed between the first display panel 100 and the second display panel 200. The column spacer 520 may be formed by the same process as the column spacer 520 of the display area DA. The thickness of the column spacer 520 in the non-display area NDA may correspond to the thickness of the column spacer in the display area DA. According to an exemplary embodiment, the thickness of the column spacer 520 in the non-display area NDA may be less than the thickness of the column spacer in the display area DA.

[0082] Reference Figure 1 , the column spacer 520 is separated from the sealant 510 to provide an empty space between the column spacer 520 and the sealant 510. The empty space may be filled with air. In this case, the distance between the column spacer 520 and the sealant 510 may be 0.1 mm to 0.8 mm. Since the column spacer 520 is separated from the sealant 510, the influence on the sealant 510 and the display area DA during the polishing process before attaching the pad part to the lateral side of the display panel can be minimized.

[0083] like Figure 1 As shown in, with respect to a display device according to an exemplary embodiment of the concept of the present invention, a stacked body having a gate conductive layer 120, a data conductive layer 170, a first color filter layer 231, a second color filter layer 232, an organic layer 180, a columnar spacer 520, a second electrode 270 and a light blocking layer 220 is disposed on the outer side of a sealant 510 at the outermost edge of a non-display area NDA.

[0084] The formation of agglomerated residues between layers exposed during a polishing process for polishing the lateral side of the display device on which the pad is disposed may be prevented and controlled by including at least two layers of the column spacer and the color filter stack 235 on the outermost side of the non-display area NDA.

[0085] Although not in Figure 1 , but the alignment layer may be disposed to overlap with the sealant 510. The alignment layer may be an extension of the alignment layer disposed in the display area DA, and the alignment layer may overlap up to the center area of ​​the sealant 510. That is, the alignment layer may be disposed between the organic layer 180 and the sealant 510, and a portion of the sealant 510 may not overlap with the alignment layer. This configuration is applicable to another exemplary embodiment in a similar manner.

[0086] The effects of the inventive concept will now be described in detail.

[0087] Figure 3 A display device with pads on the lateral sides is shown. Figure 3 As shown in , regarding the display device according to the present exemplary embodiment, the pad part 700 is formed to the lateral side of the display panel. Throughout the exemplary embodiments described in this specification, the pad part 700 may be disposed at the lateral side of the display panel.

[0088] There may be a plurality of pad parts 700, and the plurality of pad parts 700 may contact the lateral side of the display panel. The pad part 700 may be formed of a metal paste. The metal paste includes a mixture of metal and insulating material. The pad part 700 may be a silver paste.

[0089] The pad portion 700 can be electrically connected to the pad DCB-P in the circuit board DCB through the anisotropic conductive film ACF. The anisotropic conductive film ACF can be replaced with solder paste, and the pad portion 700 can be connected to the pad DCB-P in the circuit board DCB through conductive particles or solder paste in the anisotropic conductive film ACF.

[0090] Since the pad part 700 is attached to the lateral side of the display panel, a process for grinding the lateral side of the display panel is required before forming the pad part 700 on the lateral side of the display panel. When the display panel is ground as described above, the gate conductive layer 120 and the data conductive layer 170 are ground, and the grinding powder may agglomerate together to form a residue. That is, the gate conductive layer 120 and the data conductive layer 170 may include Cu, and Cu particles generated in the grinding process may form residues between the exposed layers.

[0091] Figure 4 A display device according to a comparative example of the concept of the present invention is shown. Figure 1Same cross-section. Figure 4 , regarding the display device according to the comparative example of the inventive concept, the first color filter layer 231 is disposed on the outermost edge of the non-display area NDA.

[0092] Reference Figure 4 , a residue layer 125 is formed between the gate conductive layer 120 and the first color filter layer 231. That is, residues formed in a grinding process at a lateral side of the display panel for the purpose of attaching the pad part 700 are squeezed between the gate conductive layer 120 and the first color filter layer 231, thereby forming the residue layer 125.

[0093] The residue layer 125 may include copper and thus has conductivity, and a contact resistance with the pad part 700 varies depending on an area where the residue layer 125 is formed or a thickness thereof, thereby reducing reliability of the display device.

[0094] The depth and thickness of the residue layer 125 formed in the process of grinding the lateral side differ according to the distance between the first display panel 100 and the second display panel 200 .

[0095] Figure 5 A cross-sectional view of a display device is shown in which a test is performed to establish a relationship between the area of ​​a residue layer and the distance between a first display panel and a second display panel. Figure 5 , without providing an additional structure between the first display panel 100 and the second display panel 200, the test is performed at the outermost edges of the display panels.

[0096] While changing the distance d between the first display panel 100 and the second display panel 200, Figure 5 The lateral sides of the display device of the structure shown in the figure are ground, and Figure 6 The result of forming a residue layer is shown in FIG.

[0097] Figure 6 2 shows an image when the lateral side is ground by changing the distance d between the first display panel 100 and the second display panel 200. Figure 6 , the distance d between the first display panel 100 and the second display panel 200 increases as it moves from the left side to the right side.

[0098] Figure 6 The area shown by the thick line in FIG. 1 represents the residue layer. Figure 6 It is found that the area occupied by the residue layer increases as the distance d between the first display panel 100 and the second display panel 200 increases. That is, the area of ​​the residue layer formed in the grinding process on the lateral side of the display panel is affected by the distance d between the first display panel 100 and the second display panel 200.

[0099] The gap between the first display panel 100 and the second display panel 200 varies according to the stacking configuration of the display area DA of the display panel. In this case, when the outermost edge of the display panel includes only one color filter layer, the space between the first display panel 100 and the second display panel 200 can be increased compared to the case where the outermost edge of the display panel includes more than one color filter layer.

[0100] That is, in order to prevent the formation of the residue layer 125 or to uniformly control it, the gap between the first display panel 100 and the second display panel 200 should be reduced. However, when only one color filter is included between the first display panel 100 and the second display panel 200 at the outermost edge of the display panel, the gap may increase. This is because the structure disposed on the outermost edge of the non-display area NDA of the display panel is formed by the same process as the structure of the display area DA, and thus the structure disposed on the outermost edge of the non-display area NDA of the display panel may not have a thickness greater than that of the structure of the display area DA.

[0101] When only one color filter layer is included on the outermost edge of the non-display area NDA and the space between the first display panel 100 and the second display panel 200 is not completely filled with the structure including the conductive layer, the color filter, the passivation layer, the columnar spacer, etc., during a grinding process for forming a flat surface on the lateral side of the display panel before grinding the lateral side of the display panel to form the pad part 700, the residue layer may be formed as shown in FIG. Figure 6 As shown in . Since the residue layer is not formed uniformly, the contact resistance between the pad portion and the conductive layer on the panel varies, thereby reducing the reliability of the display device.

[0102] However, the display device according to the present exemplary embodiment includes at least two color filters at the outermost portion of the non-display area NDA of the display panel. In this case, the thickness of each color filter layer at the outermost portion of the non-display area NDA of the display panel can be controlled, so the space between the first display panel 100 and the second display panel 200 can be stably filled at various spacing distances in the display device without providing an additional mask.

[0103] Figure 7 Results of measuring the height of a stack of the first color filter layer 231 and the second color filter layer 232 during changes in the areas of the first color filter layer 231 and the second color filter layer 232 are shown.

[0104] The first color filter layer 231 includes a red color filter layer, and the second color filter layer 232 includes a blue color filter layer.

[0105] In exemplary embodiment 1, the height of the stacked portion is measured by changing the size of the blue color filter layer on the red color filter layer of 28 μm (lateral) × 84 μm (vertical). In this case, the size of the blue color filter layer is variously changed within the range of 17 μm (lateral) × 17 μm (vertical) to 33 μm (lateral) × 21 μm (vertical).

[0106] As a result, it was found that the entire thickness also increased as the plane area of ​​the blue color filter layer increased.

[0107] In a similar manner, in exemplary embodiment 2, the height of the stacked portion is measured by changing the size of the blue color filter layer on the red color filter layer having a size of 21 μm (lateral) × 63 μm (longitudinal). In this case, the size of the blue color filter layer is variously changed within the range of 17 μm (lateral) × 17 μm (longitudinal) to 33 μm (lateral) × 21 μm (longitudinal). In this case, it is found that the entire thickness increases as the plane area of ​​the blue color filter layer increases.

[0108] In Exemplary Embodiment 3, the height of the stacked portion was measured by changing the size of the blue filter layer on the red filter layer having a size of 33 μm (lateral)×99 μm (vertical), and in this case it was found that the entire thickness increased as the plane area of ​​the blue filter layer increased.

[0109] The height of the color filter stack including at least two color filters can be controlled according to the area of ​​each color filter layer. Therefore, when the color filter layer on the non-display area NDA and the color filter on the display area DA are formed simultaneously, the thickness of the color filter stack 235 can be controlled by controlling the plane area of ​​the color filter layer formed at the outermost edge of the non-display area NDA without an additional mask.

[0110] Regarding the display device including the color filter stack 235 including at least two color filter layers on the outermost edge of the non-display area NDA, the height thereof can be controlled by controlling the area of ​​the color filter layer so that the space between the first display panel 100 and the second display panel 200 can be stably filled with the color filter stack 235 without using an additional mask. Therefore, according to exemplary embodiments, a residue layer can be prevented from being formed on the display panel in a grinding process for grinding the lateral side of the display panel to form a flat surface on the lateral side of the display panel before forming a pad portion on the lateral side of the display panel, or the formation of the residue layer can be stably controlled.

[0111] Various other exemplary embodiments of the inventive concept will now be described. Figure 8 Another exemplary embodiment of the present invention is shown. Figure 1Except for the size of the first color filter layer 231 and the second color filter layer 232, according to the reference Figure 8 The display device of the exemplary embodiment described corresponds to the display device according to the reference Figure 1 A detailed description of the same constituent elements will not be provided again.

[0112] Reference Figure 8 , regarding the display device according to the present exemplary embodiment, the area of ​​the first color filter layer 231 corresponds to the area of ​​the second color filter layer 232. In this case, Figure 8 The color filter stack shown in FIG. 1 may be thicker than Figure 1 Therefore, when the distance between the first display panel 100 and the second display panel 200 is large, the space therebetween can be stably filled with the first color filter layer 231 and the second color filter layer 232.

[0113] The first color filter layer 231 may be a green color filter or a red color filter. The second color filter layer 232 may be a green color filter or a blue color filter. When the first color filter layer 231 is a red color filter, the second color filter layer 232 may be a green color filter or a blue color filter. When the first color filter layer 231 is a green color filter, the second color filter layer 232 may be a blue color filter.

[0114] Fig. 9 Another exemplary embodiment of the present invention is shown. Figure 1 Except for the size of the first color filter layer 231 and the second color filter layer 232, according to Fig. 9 The display device of the exemplary embodiment corresponds to Figure 1 A detailed description of the same constituent elements will not be provided again.

[0115] Reference Fig. 9 , regarding the display device according to the present exemplary embodiment, the area of ​​the first color filter layer 231 is larger than the area of ​​the second color filter layer 232. Therefore, Fig. 9 As shown in , a portion of the first color filter layer 231 may not overlap with the second color filter layer 232. The first color filter layer 231 may be a green color filter or a red color filter. The second color filter layer 232 may be a green color filter or a blue color filter. When the first color filter layer 231 is a red color filter, the second color filter layer 232 may be a green color filter or a blue color filter. When the first color filter layer 231 is a green color filter, the second color filter layer 232 may be a blue color filter.

[0116] Fig.10 Another exemplary embodiment of the present invention is shown. Figure 1Except that the color filter stack 235 includes a first color filter layer 231, a second color filter layer 232 and a third color filter layer 233, according to Fig.10 The display device of the exemplary embodiment corresponds to Figure 1 A detailed description of the same constituent elements will not be provided again.

[0117] That is, according to Fig.10 The display device of the exemplary embodiment includes a color filter stack 235, wherein the color filter stack 235 includes a first color filter layer 231, a second color filter layer 232, and a third color filter layer 233 on the outermost edge of the non-display area NDA of the display device. Therefore, when the distance between the first display panel 100 and the second display panel 200 is large, the space between the display panels can be stably maintained.

[0118] The first color filter layer 231 may be a red color filter, the second color filter layer 232 may be a green color filter, and the third color filter layer 233 may be a blue color filter.

[0119] Fig.11 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Figure 1 Same cross-section. Fig.11 The display device according to the present exemplary embodiment corresponds to Figure 1 The display device of the exemplary embodiment of FIG. 1 is shown in FIG. 1 , except that it does not include the organic layer 180. A detailed description of the same constituent elements will not be provided.

[0120] like Fig.11 As shown in , the gap of the stacked body between the first display panel 100 and the second display panel 200 may be adjusted by not including the organic layer 180 on the outermost edge of the non-display area NDA of the display panel.

[0121] Fig.12 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Figure 8 Same cross-section. Fig.12 The display device according to the present exemplary embodiment corresponds to Figure 8 The display device of the exemplary embodiment of FIG. 1 is shown in FIG. 1 , except that it does not include the organic layer 180. A detailed description of the same constituent elements will not be provided.

[0122] Fig.13 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Fig. 9 Same cross-section. Fig.13 The display device according to the present exemplary embodiment corresponds to Fig. 9The display device of the exemplary embodiment of FIG. 1 is shown in FIG. 1 , except that it does not include the organic layer 180. A detailed description of the same constituent elements will not be provided.

[0123] Fig.14 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Fig.10 Same cross-section. Fig.14 The display device according to the present exemplary embodiment corresponds to Fig.10 The display device of the exemplary embodiment of FIG. 1 is shown in FIG. 1 , except that it does not include the organic layer 180. A detailed description of the same constituent elements will not be provided.

[0124] Fig.15 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Figure 1 Same cross-section. Fig.15 , except that the residue layer 125 is included between the first substrate 110 and the gate conductive layer 120, the display device according to the present exemplary embodiment corresponds to the display device according to Figure 1 A detailed description of the same constituent elements will not be provided again.

[0125] Reference Fig.15 , regarding the display device according to the present exemplary embodiment, the residue layer 125 is disposed between the first substrate 110 and the gate conductive layer 120. The residue layer 125 may include copper (Cu). That is, the residue layer 125 may be formed when the gate conductive layer 120 and the data conductive layer 170 are ground in a grinding process for grinding the lateral side of the display panel to form a flat surface of the lateral side of the display panel before forming the pad part 700 on the lateral side of the display panel.

[0126] When the thickness for forming the residue layer 125 is not uniformly controlled, the contact resistance between the pad portion 700 and the conductive layer on the display panel is not uniformly controlled, which is inappropriate. However, since the color filter stack 235 including at least two color filter layers is disposed on the outermost edge of the non-display area NDA of the display panel, the display device according to the present exemplary embodiment can control the thickness of the residue layer 125. That is, the thickness and depth of the residue layer 125 can be controlled by controlling the stacking thickness of at least two color filter layers, and when the pad portion 700 is formed, the residue layer 125 uniformly controlled reduces the deviation in resistance, which is appropriate.

[0127] Fig.16 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Figure 8 Same cross-section. Fig.16, except that the residue layer 125 is included between the first substrate 110 and the gate conductive layer 120, the display device according to the present exemplary embodiment corresponds to the display device according to Figure 8 The effect caused by using the residue layer 125 corresponds to the effect caused by using the residue layer 125. Fig.15 Descriptions are provided according to exemplary embodiments, and thus they will be omitted.

[0128] Fig.17 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Fig. 9 Same cross-section. Fig.17 , except that the residue layer 125 is included between the first substrate 110 and the gate conductive layer 120, the display device according to the present exemplary embodiment corresponds to the display device according to the reference Fig. 9 The display device of the exemplary embodiment described above will not be provided in detail for the same constituent elements. The effect caused by using the residue layer 125 corresponds to the effect described in reference Fig.15 Descriptions are provided according to exemplary embodiments, and thus they will be omitted.

[0129] Fig.18 FIG. 1 shows a display device according to another exemplary embodiment of the present inventive concept. Fig.10 Same cross-section. Fig.18 , except that the residue layer 125 is included between the first substrate 110 and the gate conductive layer 120, the display device according to the present exemplary embodiment corresponds to the display device according to the reference Fig.10 The display device of the exemplary embodiment described above will not be provided in detail for the same constituent elements. The effect caused by using the residue layer 125 corresponds to the effect described in reference Fig.15 Descriptions are provided according to exemplary embodiments, and thus they will be omitted.

[0130] Now, a stacking configuration of a display area DA of a display device according to an exemplary embodiment of the present inventive concept will be described in detail with reference to the accompanying drawings. However, this is an example, and the stacking configuration of the display area DA is not limited to the drawings and the exemplary embodiments described below.

[0131] Fig.19 A layout diagram of a display device according to an exemplary embodiment of the inventive concept is shown, and Fig. 20 Shows Fig.19 A cross-sectional view of a display device relative to line XX-XX'.

[0132] Reference Fig.19 and Fig. 20The display panel 1000 includes a first display panel 100 , a second display panel 200 overlapping the first display panel 100 , and a liquid crystal layer 3 disposed between the first display panel 100 and the second display panel 200 .

[0133] The first display panel 100 will now be described. A gate conductive layer including a gate line 121 and a gate electrode 124 is disposed on a first substrate 110 made of transparent glass or plastic.

[0134] The gate line 121 may extend in the first direction. The gate conductive layer may include various metals or conductors, and it may have a multi-layered structure.

[0135] The gate line 121 and the gate electrode 124 may be formed by the same process as the gate conductive layer 120 of the non-display area NDA, and they may include the same material.

[0136] A gate insulating layer 140 is disposed between the gate conductive layer and the liquid crystal layer 3. The gate insulating layer 140 may include an inorganic insulating material.

[0137] A semiconductor layer 154 is disposed on one side of the gate insulating layer 140 .

[0138] The data line 171 is disposed between the semiconductor layer 154 and the liquid crystal layer 3, and it extends in the second direction to cross the gate line 121. The source electrode 173 may extend from the data line 171 and may overlap the gate electrode 124. The drain electrode 175 is arranged to be spaced apart from the data line 171 to face the source electrode 173, and as shown in FIG. Fig.19 As shown in FIG. 1 , it may have a bar shape extending toward the center of the source electrode 173. The data line 171 may be formed by the same process as the data conductive layer 170 in the non-display area NDA, and it may include the same material.

[0139] In a region between the source electrode 173 and the drain electrode 175, a portion of the semiconductor layer 154 may not overlap with the data line 171 and the drain electrode 175. The semiconductor layer 154 may have substantially the same planar shape as the data line 171 and the drain electrode 175 except for a channel region disposed between the drain electrode 175 and the source electrode 173.

[0140] One gate electrode 124 , one source electrode 173 , and one drain electrode 175 together with the semiconductor layer 154 constitute one thin film transistor, and a channel of the thin film transistor represents a region of the semiconductor layer 154 between the source electrode 173 and the drain electrode 175 .

[0141] The color filter 230 is disposed between the liquid crystal layer 3 and the source electrode 173 and between the liquid crystal layer 3 and the drain electrode 175. The color filter 230 may include a red color filter 230R, a green color filter 230G, and a blue color filter 230B.

[0142] One first electrode 191 is disposed in a space divided by adjacent gate lines 121 and adjacent data lines 171 to form one pixel area, and the color filter 230 may be arranged to overlap one first electrode 191 for each pixel.

[0143] Each of the color filters 230 may be formed by the same process as the color filter layer disposed on the outermost edge of the non-display area NDA.

[0144] A passivation layer 181 may be disposed on the color filter. The passivation layer 181 may include an organic insulating material and an insulating material with a low dielectric constant. When the passivation layer 181 includes an organic material, the passivation layer 181 may extend to the non-display area NDA to form the organic layer 180.

[0145] The color filter 230 and the passivation layer 181 include a contact hole 185 overlapping a portion of the drain electrode 175 .

[0146] The first electrode 191 is disposed between the passivation layer 181 and the liquid crystal layer 3. The first electrode 191 is physically and electrically connected to the drain electrode 175 through the contact hole 185, and receives a data voltage from the drain electrode 175. The first electrode 191 may be a pixel electrode.

[0147] A first alignment layer 11 is disposed between the first electrode 191 and the liquid crystal layer 3 .

[0148] The end of the first alignment layer 11 may be arranged to be aligned with Figure 1 In other words, the first alignment layer 11 of the display area DA may extend to overlap with the central area of ​​the sealant 510 of the non-display area NDA. In other words, the first alignment layer 11 may be disposed between the organic layer 180 and the sealant 510, and a portion of the sealant 510 may not overlap with the first alignment layer 11.

[0149] The second display panel 200 includes a second substrate 210 , a light blocking layer 220 , a second electrode 270 and a second alignment layer 21 .

[0150] The second electrode 270 is disposed on one side of the second substrate 210. The second electrode 270 may be a common electrode.

[0151] The light blocking layer 220 is disposed between the second substrate 210 and the second electrode 270. The light blocking layer 220 may overlap the data line 171 extending in the second direction. Although not shown, the light blocking layer may further include a horizontal portion overlapping the gate line 121 and extending in the first direction. The light blocking layer 220 may be omitted.

[0152] The second alignment layer 21 is disposed between the second electrode 270 and the liquid crystal layer 3 .

[0153] The display device according to the exemplary embodiment of the inventive concept provides a color filter stack including at least two color filter layers on the outermost edge of the non-display region of the display panel to which the pad portion 700 is attached, thereby filling the space between the first display panel 100 and the second display panel 200 when the distance between the first display panel 100 and the second display panel 200 is changed. Therefore, the formation of residues can be prevented during a grinding process for forming a flat surface on the lateral side of the display panel when grinding the lateral side of the display panel to form the pad portion on the lateral side of the display panel, or the residues can be controlled to be uniformly formed.

[0154] While the inventive concept has been described in connection with what are presently considered to be practical exemplary embodiments, it is to be understood that the inventive concept is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A display device, comprising: A first substrate, the first substrate comprising a display area and a non-display area; A plurality of thin film transistors, the plurality of thin film transistors are arranged on the first substrate and are all connected to the gate conductive layer and the data conductive layer; a second substrate, the second substrate overlapping the first substrate; a sealant disposed between the first substrate and the second substrate; as well as a stacked body disposed between the first substrate and the second substrate, disposed on the outermost edge of the non-display area, and disposed to be spaced apart from the sealant, The stack includes the gate conductive layer, the data conductive layer, a columnar spacer, an organic layer, and a color filter stack in which at least two color filters are stacked. The gate conductive layer, the data conductive layer, the color filter stack, the organic layer and the columnar spacer are sequentially arranged on the first substrate. Wherein, the gate conductive layer directly contacts the data conductive layer at the outermost edge of the non-display area, wherein the direct contact area between the gate conductive layer and the data conductive layer overlaps with the color filter stack, and A side surface of the data conductive layer and a side surface of the color filter stack are in direct contact with the organic layer.

2. The display device according to claim 1, wherein: The color filter stack includes a first color filter and a second color filter overlapping each other in a plan view, and The first color filter is arranged closer to the first substrate than the second color filter.

3. The display device according to claim 2, wherein: When the first color filter is red, the second color filter is green or blue, and When the first color filter is green, the second color filter is blue.

4. The display device according to claim 2, wherein: The area of ​​the second color filter is larger than the area of ​​the first color filter, and A top surface and a side surface of the first color filter are completely covered by the second color filter.

5. The display device according to claim 1, wherein: The space between the sealant and the stacked body is filled with air.

6. The display device according to claim 1, further comprising: A pad portion is disposed on a lateral side of the stacked body and contacts the gate conductive layer and the data conductive layer on the lateral side.

7. The display device according to claim 1, wherein: The column spacer and lateral sides of the color filter stack are exposed on the outermost edge.

8. A display device, comprising: A first substrate, the first substrate comprising a display area and a non-display area; A plurality of thin film transistors, the plurality of thin film transistors are arranged on the first substrate and are all connected to the gate conductive layer and the data conductive layer; a second substrate, the second substrate overlapping the first substrate; a sealant disposed between the first substrate and the second substrate; as well as a stacked body disposed between the first substrate and the second substrate, disposed on the outermost edge of the non-display area, and disposed to be spaced apart from the sealant, The stack includes the gate conductive layer, the data conductive layer, a color filter stack including a first color filter and a second color filter, an organic layer and a columnar spacer. The gate conductive layer, the data conductive layer, the color filter stack, the organic layer and the columnar spacer are sequentially arranged on the first substrate. Wherein, the gate conductive layer directly contacts the data conductive layer at the outermost edge of the non-display area, wherein the direct contact area between the gate conductive layer and the data conductive layer overlaps with the color filter stack, and A side surface of the data conductive layer and a side surface of the color filter stack are in direct contact with the organic layer.

9. A display device, comprising: A first substrate, the first substrate comprising a display area and a non-display area; A plurality of thin film transistors, the plurality of thin film transistors are arranged on the first substrate and are all connected to the gate conductive layer and the data conductive layer; a second substrate, the second substrate overlapping the first substrate; a sealant disposed between the first substrate and the second substrate; a stacked body disposed between the first substrate and the second substrate, disposed on an outermost edge of the non-display area, and disposed to be spaced apart from the sealant; as well as a residue layer, the residue layer being arranged between the stack and the first substrate, The stack includes the gate conductive layer, the data conductive layer, a color filter stack including a first color filter and a second color filter, an organic layer and a columnar spacer. The gate conductive layer, the data conductive layer, the color filter stack, the organic layer and the columnar spacer are sequentially arranged on the first substrate. Wherein, the gate conductive layer directly contacts the data conductive layer at the outermost edge of the non-display area, wherein the direct contact area between the gate conductive layer and the data conductive layer overlaps with the color filter stack, and A side surface of the data conductive layer and a side surface of the color filter stack are in direct contact with the organic layer.

Images