Display Devices

Abstract

A display device according to an embodiment conceived in the present invention includes: a substrate including a first area and a second area; and a plurality of pixels arranged on the substrate, wherein the plurality of pixels each include a first data line and a second data line overlapping a pixel electrode, and in the pixels arranged in the first area, a first capacitance between the first data line and the pixel electrode is smaller than a second capacitance between the second data line and the pixel electrode, and in the pixels arranged in the second area, the first capacitance between the first data line and the pixel electrode is larger than a second capacitance between the second data line and the pixel electrode.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0050337, filed on April 30, 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 particularly, to a display device for differentiating capacitance of each region of the display device. Background Art

[0004] A liquid crystal display is a widely used flat panel display, and includes two display panel sheets in which field generating electrodes such as pixel electrodes and common electrodes are formed, and a liquid crystal layer interposed between the display panel sheets. A voltage is applied to the field generating electrodes to generate an electric field in the liquid crystal layer that determines the direction of liquid crystal molecules of the liquid crystal layer, and an image is displayed by controlling the polarization of incident light.

[0005] The liquid crystal display also includes a switching element connected to each pixel electrode and a plurality of signal lines (such as gate lines and data lines) for applying a voltage to the pixel electrodes by controlling the switching elements.

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

[0007] The exemplary embodiments provide a display device capable of compensating for a brightness difference due to a data voltage.

[0008] A display device according to an embodiment conceived in the present invention includes: a substrate including a first area and a second area; and a plurality of pixels arranged on the substrate, wherein the plurality of pixels each include a first data line and a second data line overlapping a pixel electrode, and in the pixels arranged in the first area, a first capacitance between the first data line and the pixel electrode is smaller than a second capacitance between the second data line and the pixel electrode, and in the pixels arranged in the second area, the first capacitance between the first data line and the pixel electrode is larger than a second capacitance between the second data line and the pixel electrode.

[0009] The display device may be scanned in a direction from the first area to the second area.

[0010] The plurality of pixels may each include: a gate line disposed on a substrate; a data line disposed to be insulated from the gate line, wherein the data line may include a first data line and a second data line; a pixel electrode disposed to overlap with the first data line and the second data line; and a pixel electrode protrusion connected to the pixel electrode, wherein the pixel electrode protrusion includes a first pixel electrode protrusion overlapping with the first data line, and the pixel disposed in the first area may further include a second pixel electrode protrusion overlapping with the second data line.

[0011] A region where the first pixel electrode overlaps the first data line in the pixel disposed in the second region protrudes may be wider than a region where the first pixel electrode overlaps the first data line in the pixel disposed in the first region protrudes.

[0012] The first data line may be electrically connected to a pixel electrode of a pixel, and the second data line may not be electrically connected to the pixel electrode electrically connected to the first data line.

[0013] The pixel may include a display area and a light shielding area, and in the light shielding area of ​​the pixel disposed in the first area, a width of the first data line may be narrower than a width of the second data line.

[0014] In the light shielding region of the pixel disposed in the second region, the width of the first data line may be wider than the width of the second data line.

[0015] A plurality of semiconductor layers disposed between the gate line and the data line may be further included, and the plurality of semiconductor layers may each include a dummy semiconductor layer disposed at a region where the gate line and the data line cross each other.

[0016] The gate line may include first and second gate lines parallel to each other and a gate electrode disposed between the first and second gate lines, and a portion of the plurality of semiconductor layers may be disposed to overlap the gate electrode to configure the transistor.

[0017] The first data line and the second data line may be bent at one edge of the pixel electrode, and a bent length of the second data line may be longer than a bent length of the first data line.

[0018] It may further include a storage electrode line arranged on the same layer as the gate line, the storage electrode line may include a first storage electrode line, a second storage electrode line and a third storage electrode line, the first storage electrode line may be arranged to be adjacent to one edge of the pixel electrode, the third storage electrode line may be arranged to be adjacent to the other edge of the pixel electrode, and the second storage electrode line may be arranged to overlap with the center of the pixel electrode.

[0019] The first data line may be disposed between the first storage electrode line and the second storage electrode line, and the second data line may be disposed between the second storage electrode line and the third storage electrode line.

[0020] A display device according to another embodiment conceived by the present invention includes: a substrate including a first area and a second area; and a plurality of pixels arranged on the substrate, wherein the plurality of pixels each include a first data line and a second data line overlapping a pixel electrode, and in the pixels arranged in the first area, a first capacitance between the first data line and the pixel electrode is smaller than a second capacitance between the second data line and the pixel electrode, and a difference between the first capacitance and the second capacitance in the first area gradually decreases as it approaches the second area.

[0021] In the pixel disposed in the second region, a first capacitance between the first data line and the pixel electrode may be greater than a second capacitance between the second data line and the pixel electrode, and in the second region, a difference between the first capacitance and the second capacitance may gradually increase away from the first region.

[0022] The first capacitance and the second capacitance may be equal in a central region of the substrate.

[0023] The plurality of pixels may each include: a gate line disposed on a substrate; a data line disposed to be insulated from the gate line, wherein the data line may include a first data line and a second data line; a pixel electrode disposed to overlap with the first data line and the second data line; and a pixel electrode protrusion connected to the pixel electrode, wherein the pixel electrode protrusion includes a first pixel electrode protrusion overlapping with the first data line, the pixels disposed in the first area may further include a second pixel electrode protrusion overlapping with the second data line, and an area of ​​the first pixel electrode protrusion overlapping with the first data line in the pixels disposed in the second area may be larger than an area of ​​the first pixel electrode protrusion overlapping with the first data line in the pixels disposed in the first area.

[0024] The pixel may include a display area and a light shielding area, and in the pixel arranged in the first area, in the light shielding area, the width of the first data line may be narrower than the width of the second data line. And in the pixel arranged in the second area, in the light shielding area, the width of the first data line may be wider than the width of the second data line.

[0025] The first data line may be electrically connected to a pixel electrode of a pixel, and the second data line may not be electrically connected to the pixel electrode electrically connected to the first data line.

[0026] A display device according to another embodiment conceived by the present invention includes: a substrate including a first area and a second area; and a plurality of pixels arranged on the substrate, wherein the plurality of pixels each include a first data line and a second data line overlapping a pixel electrode, the pixels arranged in the first area include a second pixel electrode protrusion overlapping the second data line, and an area of ​​the first pixel electrode protrusion overlapping the first data line in the pixels arranged in the second area can be larger than an area of ​​the first pixel electrode protrusion overlapping the first data line in the pixels arranged in the first area.

[0027] A display device according to another embodiment conceived by the present invention includes: a substrate including a first area and a second area; and a plurality of pixels arranged on the substrate, wherein the plurality of pixels each include a first data line and a second data line overlapping with a pixel electrode, the pixel includes a display area and a shading area, and in the pixels arranged in the first area, in the shading area, the width of the first data line is narrower than the width of the second data line, and in the pixels arranged in the second area, in the shading area, the width of the first data line is wider than the width of the second data line.

[0028] According to an embodiment, a display device capable of compensating for a brightness difference due to a data voltage is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a diagram schematically illustrating a display device according to an embodiment of the inventive concept.

[0030] Figure 2 is a layout diagram of one pixel arranged in the first area A1.

[0031] Figure 3A It is taken along line IIIa-IIIa' Figure 2 A cross-sectional view of a display device. Figure 3B It is taken along line IIIb-IIIb' Figure 2 A cross-sectional view of a display device.

[0032] Figure 4 is a layout diagram of one pixel arranged in the second area A2.

[0033] Figure 5 Various causes and effects that affect brightness in a display device are shown.

[0034] Fig. 6A and Figure 6B A graph used to measure the brightness of a display device when displaying an image without a white frame. Fig. 6A shows the measurement location, and Figure 6B is an image used to measure brightness at the measurement position.

[0035] Fig. 7A , Figure 7B , Figure 7C and Fig.7D A graph for measuring the brightness of a display device when an image including a white frame is displayed. Fig. 7A shows the measurement location, and Figure 7B is an image used to measure brightness at the measurement position. Figure 7C Shown with Figure 3B The brightness at each position in the same cross section. Fig.7D The reason why the brightness is high near the first data line and low near the second data line is shown.

[0036] Fig. 8A , Figure 8B and Figure 8C is a graph showing brightness in upper and lower areas of a white frame of a display device when the self capacitance is greater than the adjacent capacitance. Fig. 8A is a diagram showing the brightness in the upper and lower ends of the white frame when the self capacitance is larger than the adjacent capacitance. Figure 8B is a diagram showing the voltage behavior in the upper end of the white frame. Figure 8C is a diagram showing the voltage behavior in the lower end of the white frame.

[0037] Fig. 9A , Fig. 9B and Fig. 9C is a graph showing brightness in upper and lower areas of a white frame of a display device when the self capacitance is smaller than the adjacent capacitance. Fig. 9A is a diagram showing the brightness in the upper and lower ends of the white frame when the self capacitance is smaller than the adjacent capacitance. Fig. 9B is a diagram showing the voltage behavior in the upper end of the white frame. Fig. 9C is a diagram showing the voltage behavior in the lower end of the white frame.

[0038] Fig.10 is a top plan view of pixels disposed in the first area A1 according to another embodiment.

[0039] Fig.11 is a top plan view of a pixel disposed in the second area A2 according to another embodiment.

[0040] Fig.12 is a diagram illustrating a display device according to another embodiment of the inventive concept. DETAILED DESCRIPTION

[0041] The inventive concept will be described more fully hereinafter with reference to the accompanying drawings in which embodiments of the invention are shown. As will be appreciated by those skilled in the art, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the inventive concept.

[0042] In order to clearly explain the present inventive concept, parts that are not directly related to the present inventive concept are omitted, and the same reference numerals are attached to the same or similar constituent elements throughout the entire specification.

[0043] In addition, for better understanding and ease of description, the size and thickness of each configuration shown in the drawings are arbitrarily shown, but the inventive concept is not limited thereto. In the drawings, for clarity, the thickness of layers, films, panels, regions, etc. are exaggerated. In the drawings, for better understanding and ease of description, the thickness of some layers and regions are exaggerated.

[0044] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "above" another element, the element may be directly on the other element, or there may be intervening elements. Conversely, when an element is referred to as being "directly" "on" another element, there are no intervening elements. In addition, in the specification, the word "on" or "above" means being placed on or below an object part, and does not necessarily mean being placed on the upper side of the object part based on the direction of gravity.

[0045] In addition, unless explicitly described to the contrary, the word “comprise” and variations such as “comprising”, will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

[0046] Furthermore, throughout the specification, the phrase "on a plane" means observing a target portion from the top, and the phrase "on a cross section" means observing a cross section formed by vertically cutting the target portion from the side.

[0047] Now, a display device according to an embodiment of the inventive concept will be described in detail with reference to the accompanying drawings.

[0048] Figure 1 Schematically illustrates a display device 1000 according to an embodiment of the inventive concept. Figure 1 , the display device 1000 according to an embodiment of the inventive concept includes a first area A1 and a second area A2. Figure 1 As shown in FIG. 1 , the first area A1 and the second area A2 are disposed at opposite sides relative to the center in the second direction DR2 of the display device 1000. Scanning is performed in a direction from the first area A1 to the second area A2. As described in detail later, the capacitance Cdp between the data line and the pixel electrode in the first area A1 and the second area A2 is different from each other.

[0049] That is, in one pixel of the display device 1000 according to the present embodiment, the pixel electrode overlaps with two data lines. In this case, one data line is a data line connected to a corresponding pixel (hereinafter, a first data line), and the other data line is a data line connected to an adjacent pixel (hereinafter, a second data line).

[0050] In the pixel disposed in the first area A1 , the capacitance between the first data line and the pixel electrode (hereinafter, the self capacitance Cdp1 ) is smaller than the capacitance between the second data line and the pixel electrode (hereinafter, the proximity capacitance Cdp2 ).

[0051] In addition, in the pixel disposed in the second area A2, the self capacitance Cdp1 is greater than the adjacent capacitance Cdp2. By making the self capacitance Cdp1 and the adjacent capacitance Cdp2 of each pixel different for each area of ​​the display device 1000, the brightness deviation due to the data voltage can be compensated. The detailed effect is described in detail later.

[0052] The pixels disposed in the first area A1 and the second area A2 are described in detail with reference to the accompanying drawings.

[0053] In this specification, a pixel means an area occupied by a transistor and a pixel electrode connected to the transistor, and Figure 2 One pixel is shown.

[0054] Figure 2 is a layout diagram of one pixel arranged in the first area A1. Figure 3A It is taken along line IIIa-IIIa' Figure 2 1 is a cross-sectional view of a display device 1000 . Figure 3B It is taken along line IIIb-IIIb' Figure 2 1 is a cross-sectional view of a display device 1000 .

[0055] refer to Figure 2 and Figure 3A , including a plurality of gate lines 121 disposed on a first substrate 110 made of transparent glass or plastic.

[0056] The gate lines 121 transmit gate signals and extend in a first direction DR1. Each gate line 121 includes a first gate line 121a and a second gate line 121b that are separated from each other and a gate electrode 124 connecting the first gate line 121a and the second gate line 121b.

[0057] In addition, storage electrode lines 129 may be disposed on the same layer as gate lines 121. Storage electrode lines 129 include first storage electrode lines 129a, second storage electrode lines 129b, and third storage electrode lines 129c extending in the second direction DR2, and first storage electrode lines 129a, second storage electrode lines 129b, and third storage electrode lines 129c are connected to transverse storage electrode lines 129d extending in parallel with the first direction DR1. Second storage electrode line 129b may include two portions separated from each other, and second storage electrode lines 129b not connected to transverse storage electrode lines 129d may be provided with an island shape.

[0058] A gate insulating layer 140 made of an insulating material such as silicon oxide or silicon nitride is disposed on the gate line 121 and the storage electrode line 129. The gate insulating layer 140 may have a multi-layered structure including at least two insulating layers having different physical properties.

[0059] A plurality of semiconductor layers 154 are disposed on the gate insulating layer 140. The semiconductor layer 154 may be disposed to overlap the gate electrode 124. In addition, a dummy semiconductor layer 155 disposed on the same layer as the semiconductor layer 154 may be disposed at a position where the gate line 121 and the data line 171 intersect and at a position where the lateral storage electrode line 129d and the data line 171 intersect. These dummy semiconductor layers 155 smooth the steps at the regions where the wiring intersects. However, the dummy semiconductor layer 155 does not constitute a transistor or the like.

[0060] Next, a plurality of data lines 171 , a plurality of source electrodes 173 connected to the data lines 171 , and a plurality of drain electrodes 175 are disposed on the semiconductor layer 154 and the gate insulating layer 140 .

[0061] The data line 171 extends in the second direction DR2 to cross the gate line 121. The data line 171 includes a first data line 171a and a second data line 171b. The first data line 171a and the second data line 171b overlap the pixel electrode 191 and are arranged not to overlap the first storage electrode line 129a, the second storage electrode line 129b, and the third storage electrode line 129c.

[0062] Specifically, the first data line 171a may be disposed between the first storage electrode line 129a and the second storage electrode line 129b. In addition, the second data line 171b may be disposed between the second storage electrode line 129b and the third storage electrode line 129c.

[0063] The first data line 171a constitutes the corresponding transistor of the overlapping pixel. However, the second data line 171b constitutes the transistor of other pixels (not shown) adjacent in the second direction. That is, in the present embodiment, two data lines overlap with one pixel electrode 191, but only one data line 171a is electrically connected to the pixel electrode 191, and the other data line 171b is electrically connected to the pixel electrode adjacent to the other data line 171b.

[0064] The second data line 171b may be disposed to be bent and / or curved near an edge in the second direction DR2 of the pixel electrode 191. The first data line 171a may also be disposed to be curved near an edge in the second direction DR2 of the pixel electrode 191. At this time, the curved length of the second data line 171b may be longer than the curved length of the first data line 171a (for example, the length of the curved portion of the second data line 171b may be longer than the length of the curved portion of the first data line 171a).

[0065] A portion of the first data line 171a constitutes a source electrode 173. The source electrode 173 extends from the first data line 171a and overlaps the gate electrode 124 and may have an approximately U shape. The drain electrode 175 is separated from the first data line 171a and extends from the center of the U shape of the source electrode 173 toward the top.

[0066] One gate electrode 124 , one source electrode 173 , and one drain electrode 175 together with the semiconductor layer 154 form one thin film transistor TFT, and a channel region of the thin film transistor TFT is formed in the semiconductor layer 154 between the source electrode 173 and the drain electrode 175 .

[0067] Next, a plurality of color filters 230 are disposed on the data line 171. The color filters 230 may include a red color filter, a green color filter, and a blue color filter. Each color filter 230 may be located in a region corresponding to one pixel electrode 191.

[0068] Next, an insulating layer 180 is provided. The insulating layer 180 may be made of an inorganic insulator such as silicon nitride or silicon oxide, an organic insulator, or a low dielectric constant insulator.

[0069] The insulating layer 180 and the color filter 230 include a contact hole 181 overlapping the drain electrode 175. The pixel electrode 191 is physically and electrically connected to the drain electrode 175 through the contact hole 181, thereby receiving a data voltage from the drain electrode 175.

[0070] Pixel electrode 191 may include a transparent conductor such as ITO or IZO. Pixel electrode 191 includes a transverse stem portion 192 extending in a first direction DR1 and a longitudinal stem portion 193 crossing transverse stem portion 192 and extending in a second direction DR2. Thin branches 199 extend from each stem portion 192 and 193.

[0071] The pixel electrode 191 overlaps both the first and third storage electrode lines 129a and 129c and includes an outer longitudinal stem portion 195 extending in the second direction DR2. The outer longitudinal stem portion 195 is connected to an edge of the transverse stem portion 192 of the pixel electrode 191.

[0072] The pixel electrode 191 further includes an outer transverse stem portion 196. The outer transverse stem portion 196 is disposed adjacent to the thin film transistor TFT, and a portion of the outer transverse stem portion 196 is connected to the drain electrode 175 through the contact hole 181 to receive a data voltage.

[0073] A portion of the outer transverse stem portion 196 includes a first protrusion 196a overlapping the first data line 171a and a second protrusion 196b overlapping the second data line 171b. The first data line 171a and the first protrusion 196a overlapping each other form a self-capacitance Cdp1. The second data line 171b and the second protrusion 196b overlapping each other constitute a proximity capacitance Cdp2.

[0074] refer to Figure 2 , the area of ​​the second protrusion 196b is larger than the area of ​​the first protrusion 196a. Therefore, the value of the proximity capacitance Cdp2 between the second protrusion 196b and the second data line 171b is larger than the value of the self capacitance Cdp1. Figure 2 As shown in , the value of the neighboring capacitance Cdp2 is greater than that of the self capacitance Cdp1, so that the brightness deviation due to the data voltage can be compensated. Specific effects will be described later.

[0075] refer to Figure 2 , including an overlapping pixel electrode 197 overlapping a portion of the gate line 121. The overlapping pixel electrode 197 may extend along the first direction DR1.

[0076] Next, refer to Figure 2 and Figure 3A , the light shielding member 220 is disposed on the pixel electrode 191. The light shielding member 220 is disposed along the first direction DR1 and overlaps with the thin film transistor TFT and the gate line 121. Figure 2 In the embodiment, a region overlapping with the light blocking member 220 is referred to as a light blocking region, and a region not overlapping with the light blocking member 220 is referred to as a display region.

[0077] Next, refer to Figure 3A , the common electrode 270 is disposed on the second substrate 210 . The liquid crystal layer 3 including liquid crystal molecules 31 is disposed between the first display panel 100 and the second display panel 200 .

[0078] Figure 3B Shows Figure 2 Another cross section of. Figure 3B, the first storage electrode line 129a, the second storage electrode line 129b and the third storage electrode line 129c are arranged to be separated from each other on the first substrate 110, and the first data line 171a and the second data line 171b are arranged between the first storage electrode line 129a, the second storage electrode line 129b and the third storage electrode line 129c. The description of other constituent elements is the same as Figure 3A The description in is the same as that in the above, so that the detailed explanation of the same constituent elements is omitted.

[0079] Next, refer to Figure 4 Description set in Figure 1 The setting of one pixel in the second area A2. Figure 4 is a layout diagram of a pixel disposed in the second area A2. Figure 4 , the arrangement of the pixels arranged in the second area A2 is similar to Figure 2 The arrangement in FIG. 1 is the same except for the configuration related to the first protrusion 196a of the outer lateral trunk portion 196. Detailed description of the same constituent elements is omitted.

[0080] refer to Figure 4 In the pixel according to the present embodiment, the outer transverse trunk portion 196 includes only the first protrusion 196a without the second protrusion 196b. Therefore, the first protrusion 196a and the first data line 171a form a self-capacitance Cdp1, and the value of the self-capacitance Cdp1 becomes greater than the value of the adjacent capacitance Cdp2. In the present embodiment, the second protrusion 196b is not provided. However, the outer transverse trunk portion 196 and the second data line 171b partially overlap, thereby forming the adjacent capacitance Cdp2 in the overlapping area. However, since the second data line 171b does not include a configuration corresponding to the first protrusion 196a overlapping the first data line 171a, the self-capacitance Cdp1 is greater than the adjacent capacitance Cdp2.

[0081] also, Figure 4 The area of ​​the first protrusion 196a is greater than Figure 2 Since the second data line 171b is bent near the edge of the pixel electrode 191 in the second direction DR2, Figure 2 The first protrusion 196a is a structure configured to compensate for capacitance through the bent portion of the second data line 171b. Figure 4 In the pixel, the area of ​​the first protrusion 196a should be larger than Figure 2 The area of ​​the first protrusion 196a in the pixel is reduced, and in this case, the self capacitance Cdp1 becomes larger than the adjacent capacitance Cdp2.

[0082] That is, in the display device 1000 according to the present embodiment, the pixel disposed in the first area A1 further includes the second protrusion 196b overlapping the second data line 171b, so that the neighboring capacitance Cdp2 is larger than the self-capacitance Cdp1, and in the pixel disposed in the second area A2, the area of ​​the first protrusion 196a overlapping the first data line 171a is wider without including the second protrusion 196b, so that the self-capacitance Cdp1 is larger than the neighboring capacitance Cdp2. Therefore, since the sizes of the self-capacitance Cdp1 and the neighboring capacitance Cdp2 are different from each other, the brightness deviation due to the data voltage can be compensated.

[0083] Figure 5 Various causes and results affecting the brightness in the display device 1000 are shown. Figure 5 , when an image in which a white frame is set at the center is displayed, if the self-capacitance Cdp1 is large, the image appears bright at the top of the white frame and dark at the bottom. On the contrary, if the self-capacitance Cdp1 is reduced, the image appears dark at the top of the white frame and bright at the bottom.

[0084] The brightness of the display device 1000 is also affected by the leakage of the thin film transistor TFT and the data voltage. Specifically, in the display device 1000 according to the present embodiment, since the data line 171 and the pixel electrode 191 overlap in the display area, the brightness due to the data voltage is greatly affected. Figure 5 , the brightness variation due to the data voltage appears bright at the top and bottom of the white frame.

[0085] Therefore, the data voltage causes the display device 1000 to be significantly brighter at the top and bottom of the white frame. However, in the display device 1000 according to the present embodiment, the self-capacitance Cdp1 is made smaller than the adjacent capacitance Cdp2 at the top of the white frame (i.e., at the top of the display device 1000), so that the top of the display device 1000 is recognized as darkened, thereby compensating for the brightness brightened by the data voltage. In addition, the self-capacitance Cdp1 is made larger than the adjacent capacitance Cdp2 at the bottom of the white frame (i.e., at the bottom of the display device 1000), so that the bottom of the display device 1000 is recognized as darkened, thereby compensating for the brightness brightened by the data voltage.

[0086] Fig. 6A and Figure 6B is a graph for measuring the brightness of the display device 1000 when an image without a white frame is displayed. Fig. 6A shows the measurement location, and Figure 6B is an image used to measure brightness at the measurement position. Fig. 6A The display panel DP and the pad 700 are shown. Figure 6B, it can be confirmed that there is no brightness deviation according to the position in the pixel in the image without the white frame.

[0087] Fig. 7A , Figure 7B , Figure 7C and Fig.7D is a graph for measuring the brightness of the display device 1000 when an image including a white frame is displayed. Fig. 7A shows the measurement location, and Figure 7B is an image used to measure brightness at the measurement position. Fig. 7A The display panel DP and the pad 700 are shown. Figure 7B , in the case of an image including a white frame, it can be determined that a brightness deviation occurs for each position in the pixel. Figure 7C Shown with Figure 3B The brightness of each position in the same section. Figure 7C , it can be determined that the brightness is high near the first data line 171 a electrically connected to the pixel electrode 191 , and the brightness is low near the second data line 171 b not electrically connected to the pixel electrode 191 .

[0088] Fig.7D FIG. 1 shows why the brightness is high near the first data line 171 a and low near the second data line 171 b. Fig.7D , the potential near the first data line 171a connected to the pixel electrode 191 to supply the data voltage of 15V increases, so that the brightness is high. However, the potential near the second data line 171b connected to the adjacent pixel electrode, which is not supplied with the data voltage during driving the corresponding pixel, decreases, and therefore, the brightness is low.

[0089] Fig. 8A , Figure 8B and Figure 8C is a graph showing brightness in the upper and lower areas of the white frame of the display device 1000 when the self capacitance Cdp1 is greater than the adjacent capacitance Cdp2 . Fig. 8A is a diagram showing the brightness in the upper and lower ends of the white frame when the self capacitance Cdp1 is larger than the adjacent capacitance Cdp2 . Fig. 8A The display panel DP and the pad 700 are shown. Fig. 8A , the top of the white box appears lighter, and the bottom of the white box appears darker. Figure 8B is a diagram showing the voltage behavior in the upper end of the white frame. Figure 8B As shown in , at the top of the white frame, since the data voltages are driven in directions away from each other, the image appears bright. Figure 8C The voltage behavior at the bottom of the white box is shown. Figure 8CAs shown in , at the bottom of the white frame, the data voltages are driven in a direction toward each other, causing the image to appear dark.

[0090] Fig. 9A , Fig. 9B and Fig. 9C is a graph showing brightness in the upper and lower areas of the white frame of the display device 1000 when the self capacitance Cdp1 is smaller than the adjacent capacitance Cdp2 . Fig. 9A is a diagram showing the brightness in the upper and lower ends of the white frame when the self capacitance Cdp1 is smaller than the adjacent capacitance Cdp2 . Fig. 9A The display panel DP and the pad 700 are shown. Fig. 9A , the top of the white box appears darker, and the bottom of the white box appears lighter. Fig. 9B is a diagram showing the voltage behavior in the upper end of the white frame. Fig. 9B As shown in , at the top of the white frame, since the data voltages are driven in directions approaching each other, the image appears dark. Fig. 9C is a diagram showing the voltage behavior in the lower end of the white frame. Fig. 9C As shown in , at the bottom of the white frame, since the data voltages are driven in directions away from each other, the image appears bright.

[0091] That is, in the display device 1000 according to this embodiment, the phenomenon that the brightness at the upper and lower ends of the white frame changes according to the size difference between the self capacitance Cdp1 and the adjacent capacitance Cdp2 is used, thereby solving the problem that the brightness of the entire display device 1000 increases due to the data voltage.

[0092] That is, in order to compensate for bright brightness, when the self capacitance Cdp1 and the adjacent capacitance Cdp2 are appropriately adjusted so as to reduce the brightness, the brightness attributed to the data voltage is compensated.

[0093] At this time, there are differences in the method of reducing the brightness of each area based on the center of the display device 1000. That is, referring to Figure 5 , the self-capacitance Cdp1 should be smaller than the adjacent capacitance Cdp2 to reduce the brightness of the top of the display device 1000 (ie, the top of the white frame). Figure 2 As shown in FIG. 1 , in order to increase the proximity capacitance Cdp2 , the second protrusion 196 b is added.

[0094] Reference again Figure 5 , in order to reduce the brightness at the bottom of the display device 1000 (ie, the bottom of the white frame), the self capacitance Cdp1 should be greater than the adjacent capacitance Cdp2. Figure 4 As shown in , in order to increase the self-capacitance Cdp1, the area of ​​the first protrusion 196a is increased.

[0095] In the above, an embodiment is described in which the self capacitance Cdp1 and the adjacent capacitance Cdp2 are adjusted by using the first and second protrusions 196a and 196b as a part of the pixel electrode 191. However, the self capacitance Cdp1 and the adjacent capacitance Cdp2 may be adjusted by controlling the width of the data line 171 instead of the pixel electrode 191.

[0096] Fig.10 and Fig.11 is a diagram illustrating pixels disposed in a first area A1 and a second area A2 in a display device 1000 according to another embodiment.

[0097] Fig.10 is a top plan view of a pixel disposed in the first area A1, and Fig.11 is a top plan view of pixels arranged in the second area A2.

[0098] refer to Fig.10 In the pixel according to the present embodiment, the width of the second data line 171b is enlarged in the region overlapping with the light shielding member 220. In other words, by increasing the width of the second data line 171b without adding a separate protrusion in the same layer as the pixel electrode 191, the overlapping region of the existing pixel electrode 191 and the second data line 171b is increased. Figure 2 Similarly, the adjacent capacitance Cdp2 is larger than the self capacitance Cdp1 and is in the upper region of the display device 1000, so in the example from Figure 5 It is determined that the brightness decreases in this case, and the brightness increase due to the data voltage can be compensated. The other configurations are the same as those described above, and detailed descriptions of the same constituent elements are omitted.

[0099] refer to Fig.11 , in the pixel according to the present embodiment, the width of the first data line 171a is expanded in the region overlapping with the light shielding member 220. That is, the area of ​​the first protrusion 196a is not changed, and by increasing the width of the first data line 171a, the overlapping region of the pixel electrode 191 and the first data line 171a is increased. Therefore, the self capacitance Cdp1 is greater than the adjacent capacitance Cdp2. Since the second area A2 is the lower end area of ​​the display device 1000, as shown in FIG. Figure 5 determined in, the brightness is reduced, and therefore, and Figure 4 As in the embodiment, the brightness increase due to the data voltage can be compensated. Other configurations are the same as those described above, and detailed descriptions of the same constituent elements are omitted.

[0100] In the above, in the configuration in which the display device 1000 is divided into the first area A1 and the second area A2, the self-capacitance Cdp1 is smaller than the adjacent capacitance Cdp2 in the first area A1, and the self-capacitance Cdp1 is larger than the adjacent capacitance Cdp2 in the second area A2. However, in another embodiment, the difference between the self-capacitance Cdp1 and the adjacent capacitance Cdp2 may be gradually increased and decreased.

[0101] Fig.12 2 is a diagram illustrating a display device 1000 according to another embodiment of the inventive concept. Fig.12 , the difference between the self capacitance Cdp1 and the neighboring capacitance Cdp2 is largest in the uppermost area divided by the center of the display device 1000. However, the difference between the self capacitance Cdp1 and the neighboring capacitance Cdp2 decreases toward the center, and the self capacitance Cdp1 and the neighboring capacitance Cdp2 become equal at the center of the display device 1000.

[0102] When passing through the center of the display device 1000, the self capacitance Cdp1 is greater than the adjacent capacitance Cdp2 at the lower side, and the difference therebetween increases away from the center. If the difference between the self capacitance Cdp1 and the adjacent capacitance Cdp2 is gradually adjusted, the brightness increase due to the data voltage can be effectively compensated.

[0103] The values ​​of the self-capacitance Cdp1 and the adjacent capacitance Cdp2 can be adjusted in various ways. Figures 2 to 4 As shown in , these values ​​can be adjusted by using the areas of the first protrusion 196a and the second protrusion 196b disposed on the same layer as the pixel electrode 191, and as shown in FIG. Fig.10 and Fig.11 As shown in , these values ​​can be adjusted by using the widths of the first data line 171a and the second data line 171b.

[0104] Since the capacitance increases as the area of ​​the protrusion becomes larger or the width of the data line increases, a person skilled in the art may adjust the capacitance by gradually increasing or decreasing the area or width per region of the display device 1000 .

[0105] While the invention has been described in conjunction with what are presently considered to be implementable embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but 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 substrate including a first area and a second area, wherein the first area and the second area are disposed at opposite sides relative to a center of a display device, and the display device is scanned in a direction from the first area to the second area; as well as A plurality of pixels are disposed on the substrate. wherein each of the plurality of pixels comprises a first data line and a second data line overlapping a pixel electrode, wherein the first data line is electrically connected to the pixel electrode of the pixel, and the second data line is not electrically connected to the pixel electrode electrically connected to the first data line, In the pixel disposed in the first area, a first capacitance between the first data line and the pixel electrode is smaller than a second capacitance between the second data line and the pixel electrode, and In the pixel disposed in the second area, a first capacitance between the first data line and the pixel electrode is greater than a second capacitance between the second data line and the pixel electrode.

2. The display device according to claim 1, wherein: Each of the plurality of pixels comprises: A gate line disposed on the substrate; a data line arranged to be insulated from the gate line, wherein the data line comprises the first data line and the second data line; the pixel electrode being arranged to overlap the first data line and the second data line; and A pixel electrode protrusion connected to the pixel electrode, wherein the pixel electrode protrusion includes a first pixel electrode protrusion overlapping the first data line, and the pixel disposed in the first area further includes a second pixel electrode protrusion overlapping the second data line.

3. The display device according to claim 2, wherein: A region where the first pixel electrode overlaps the first data line in the pixel disposed in the second region protrudes wider than a region where the first pixel electrode overlaps the first data line in the pixel disposed in the first region.

4. The display device according to claim 1, wherein: The pixel includes a display area and a light shielding area, and In the light shielding area of ​​the pixel disposed in the first area, a width of the first data line is narrower than a width of the second data line.

5. The display device according to claim 4, wherein: In the light shielding region of the pixel disposed in the second region, the width of the first data line is wider than the width of the second data line.

6. The display device according to claim 1, wherein The difference between the first capacitance and the second capacitance in the first region gradually decreases toward the second region.

7. The display device according to claim 6, wherein: In the second region, the difference between the first capacitance and the second capacitance gradually increases away from the first region.

8. The display device according to claim 6, wherein: The first capacitance and the second capacitance are equal in a central region of the substrate.

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