JP2017181816A - Display device, liquid crystal display device, and manufacturing method for display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device including a curved display surface, in which the light leakage near the four corners of a display screen is reduced.SOLUTION: A display device has a curved display surface and includes a first substrate bent in a first direction, a second substrate bent in the first direction and disposed opposite to the first substrate, and a sealing portion to attach the first substrate and the second substrate to each other. The sealing portion includes a first sealing part extending in a second direction orthogonal to the first direction, and a second sealing part extending in the first direction. The width of the first sealing part in the first direction is larger than the width of the second sealing part in the second direction.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a display device, a liquid crystal display device, and a method for manufacturing the display device.

  In recent years, a liquid crystal display device having a curved display surface has been proposed (for example, Patent Document 1). In such a liquid crystal display device, each of a pair of substrates (a thin film transistor substrate (TFT substrate) and a color filter substrate (CF substrate)) is formed to be curved in a curved shape.

JP 2009-92984 A

  Here, the inventors of the present application, among liquid crystal display devices having a curved display surface, particularly in a horizontal electric field type liquid crystal display device typified by an IPS (In-Place-Switching) method, are located near the four corners of the display screen. It was found that light leakage (white floating) occurred. Specifically, for example, when both substrates are formed in a curved shape so that the display surface side is convex, compressive stress acts on the glass substrate constituting the TFT substrate, and stretching stress acts on the glass substrate constituting the CF substrate. Work. Thereby, a phase difference is generated in an oblique direction with respect to the liquid crystal molecules between the two glass substrates. In the horizontal electric field method, since the liquid crystal molecules are arranged substantially parallel to both substrates, the oblique light (polarized light) is further rotated by the influence of the phase difference. As a result, the rotation of polarized light is not canceled out by the polarizing plate, light leakage occurs, and white floating is easily seen during black display. This light leakage appears remarkably in the vicinity of the four corners where stress is concentrated on the glass substrate surface.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a display device having a curved display surface and a display device and a display device capable of reducing light leakage that occurs near the four corners of the display screen. It is in providing the manufacturing method of.

  In order to solve the above problems, a display device according to the present invention is a display device having a curved display surface, which is bent in a first direction, bent in the first direction, A second substrate disposed opposite to the first substrate; and a seal portion that bonds the first substrate and the second substrate; and the seal portion extends in a second direction orthogonal to the first direction. A first seal portion that is present and a second seal portion that extends in the first direction, wherein the width of the first seal portion in the first direction is the width of the second seal portion in the second direction. It is characterized by being larger than.

  In the liquid crystal display device according to the present invention, a width of the first seal portion in the first direction may be 1.1 to 5.0 times a width of the second seal portion in the second direction.

  The liquid crystal display device according to the present invention includes a first substrate bent in a first direction, a second substrate bent in the first direction and disposed opposite to the first substrate, the first substrate, and the first substrate. And a liquid crystal layer sandwiched between two substrates, having a curved display surface, and applying an electric field substantially parallel to the first substrate and the second substrate to the liquid crystal layer. An apparatus, comprising: a seal portion for bonding the first substrate and the second substrate, wherein the seal portion extends in a second direction orthogonal to the first direction; A width of the first seal portion in the first direction is greater than a width of the second seal portion in the second direction.

  In the liquid crystal display device according to the present invention, a width of the first seal portion in the first direction may be 1.1 to 5.0 times a width of the second seal portion in the second direction.

  The display device manufacturing method according to the present invention includes a step of manufacturing a first substrate, a step of manufacturing a second substrate, a step of applying a sealing material to the first substrate, and the sealing material being applied. Applying the sealing material, including bonding the second substrate to the first substrate, curing the sealing material, and bending the first substrate and the second substrate in a first direction. In the step of performing, the width of the first seal material applied in the second direction orthogonal to the first direction is greater than the width of the second seal material applied in the first direction in the second direction. The sealing material is applied so as to be large.

  In the method for manufacturing a liquid crystal display device according to the present invention, in the step of applying the sealing material, the application speed when applying the first sealing material is slower than the application speed when applying the second sealing material. May be.

  In the method for manufacturing a liquid crystal display device according to the present invention, in the step of applying the sealing material, the number of times of application when applying the first sealing material is larger than the number of times of applying when applying the second sealing material. May be.

  According to the liquid crystal display device and the method for manufacturing the same according to the present invention, in a display device having a curved display surface, it is possible to reduce light leakage that occurs near the four corners of the display screen.

It is a figure which shows the outline of the whole structure of the liquid crystal display device which concerns on this embodiment. It is a top view which shows the structural example of the pixel of the display panel which concerns on this embodiment. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a top view which shows the structure of the liquid crystal display device which concerns on this embodiment. It is a top view which shows the other structure of the liquid crystal display device which concerns on this embodiment. It is CC sectional drawing of FIG. It is a figure which shows the light transmittance distribution in the liquid crystal display device which concerns on a comparative example. It is a graph which shows the result of having measured the amount of T / C gaps in the liquid crystal display concerning a comparative example. It is a figure which shows the stress distribution in XY plane of the glass substrate which comprises the liquid crystal display device which concerns on a comparative example. It is a figure which shows the transmittance | permeability distribution of the light in the liquid crystal display device which concerns on this embodiment. It is the graph which compared the T / C deviation | shift amount of the liquid crystal display device which concerns on this embodiment, and the liquid crystal display device which concerns on a comparative example. It is a figure which shows the stress distribution in XY plane of the glass substrate which comprises the liquid crystal display device which concerns on this embodiment.

  An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating a schematic configuration of a liquid crystal display device according to the present embodiment. The liquid crystal display device 1 includes a display panel 10 that displays an image, a drive circuit that drives the display panel 10 (a data line drive circuit 20, a gate line drive circuit 30, and the like), a control circuit 40 that controls the drive circuit, and a display The panel 10 includes a backlight device 50 that emits light from the back side. The drive circuit may be provided in the display panel 10. The liquid crystal display device 1 has a curved outer shape that is curved so that the display surface side or the back surface side is convex. The same applies to a curved outer shape curved so that the display surface side or the back surface side is concave. In this case, stretching stress acts on the glass substrate constituting the thin film transistor substrate (TFT substrate), and compressive stress acts on the glass substrate constituting the color filter substrate (CF substrate).

  The display panel 10 is provided with a plurality of data lines 11 extending in the column direction and a plurality of gate lines 12 extending in the row direction. At each intersection of each data line 11 and each gate line 12, a thin film transistor 13 (TFT) is provided. Each data line 11 and each gate line 12 are formed in a curved shape (convex shape) according to the bending direction of the liquid crystal display device 1. The bending direction is a direction horizontal to the display surface, for example, a row direction or a column direction. For example, when the bending direction is the row direction (see FIG. 5 described later), the data line 11 is formed in a straight line shape, and the gate line 12 is formed in a curved shape. When the bending direction is the column direction (see FIG. 6 described later), the data line 11 is formed in a curved shape, and the gate line 12 is formed in a linear shape.

  In the display panel 10, a plurality of pixels 14 are arranged in a matrix (row direction and column direction) corresponding to each intersection of each data line 11 and each gate line 12. As will be described in detail later, the display panel 10 includes a thin film transistor substrate (TFT substrate), a color filter substrate (CF substrate), and a liquid crystal layer sandwiched between the substrates. The TFT substrate is provided with a plurality of pixel electrodes 15 provided corresponding to each pixel 14 and one common electrode 16 common to each pixel 14. The common electrode 16 may be divided for each pixel 14 or a plurality of pixels 14.

  The control circuit 40 includes various control signals for controlling the drive timing of the data line driving circuit 20 and the gate line driving circuit 30 based on input data (synchronization signal, video signal, etc.) input from the outside, and a display panel The image data corresponding to the image displayed in the 10 display areas is output.

  The data line drive circuit 20 outputs a data signal (data voltage) to each data line 11 based on the control signal and image data input from the control circuit 40.

  The gate line driving circuit 30 generates a gate signal (gate voltage) based on a power supply voltage input from the outside and a control signal input from the control circuit 40, and outputs the gate signal to each gate line 12.

  FIG. 2 is a plan view illustrating a configuration example of the pixel 14 of the display panel 10. 3 is a cross-sectional view taken along line AA in FIG. 2, and FIG. 4 is a cross-sectional view taken along line BB in FIG. A specific configuration of the pixel 14 will be described with reference to FIGS.

  In FIG. 2, a region defined by two adjacent data lines 11 and two adjacent gate lines 12 corresponds to one pixel 14. Each pixel 14 is provided with a thin film transistor 13. The thin film transistor 13 includes a semiconductor layer 21 formed on the insulating film 102 (see FIG. 3), and a drain electrode 22 and a source electrode 23 formed on the semiconductor layer 21 (see FIG. 2). . The drain electrode 22 is electrically connected to the data line 11, and the source electrode 23 is electrically connected to the pixel electrode 15 through the through hole 24.

  Each pixel 14 is formed with a pixel electrode 15 made of a transparent conductive film such as tin-added indium oxide (ITO). The pixel electrode 15 has a plurality of openings (slits) and is formed in a stripe shape. The shape of the opening is not limited. In common with each pixel 14, one common electrode 16 made of a transparent conductive film such as ITO is formed over the entire display area. In the common electrode 16, an opening (corresponding to a dotted line in FIG. 2) for electrically connecting the pixel electrode 15 and the source electrode 23 is formed in a region overlapping the through hole 24 and the source electrode 23 of the thin film transistor 13. Has been.

  As shown in FIG. 3, the display panel 10 includes a TFT substrate 100, a CF substrate 200, and a liquid crystal layer 300 sandwiched between the TFT substrate 100 and the CF substrate 200.

  In the TFT substrate 100, the gate line 12 (see FIG. 4) is formed on the glass substrate 101, and the insulating film 102 is formed so as to cover the gate line 12. A data line 11 (see FIG. 3) is formed on the insulating film 102, and an insulating film 103 is formed so as to cover the data line 11. A common electrode 16 is formed on the insulating film 103, and an insulating film 104 is formed so as to cover the common electrode 16. A pixel electrode 15 is formed on the insulating film 104, and an alignment film 105 is formed so as to cover the pixel electrode 15. A polarizing plate 106 is attached to the surface (back surface) of the glass substrate 101 on the backlight device 50 side (the side opposite to the liquid crystal layer 300 side).

  In the CF substrate 200, a black matrix 203 and a colored portion 202 (for example, a red portion, a green portion, and a blue portion) are formed on a glass substrate 201, and an overcoat layer 204 is formed so as to cover them. An alignment film 205 is formed on the overcoat layer 204. A polarizing plate 206 is attached to the surface (front surface) of the glass substrate 201 on the display surface side (the side opposite to the liquid crystal layer 300 side). The stacked structure of each part constituting the pixel 14 is not limited to the structure of FIGS. 3 and 4, and a known structure can be applied.

  Liquid crystal 301 is sealed in the liquid crystal layer 300. The liquid crystal 301 may be a negative liquid crystal having a negative dielectric anisotropy or a positive liquid crystal having a positive dielectric anisotropy. The alignment films 105 and 205 may be alignment films that have been subjected to a rubbing alignment process, or may be optical alignment films that have been subjected to a photo-alignment process.

  As described above, the liquid crystal display device 1 has a lateral electric field type configuration in which an electric field substantially parallel to the TFT substrate 100 and the CF substrate 200 is applied to the liquid crystal layer 300. The liquid crystal display device 1 has, for example, an IPS (In Plane Switching) system configuration.

  A method for driving the liquid crystal display device 1 will be briefly described. A scanning gate voltage (gate on voltage, gate off voltage) is supplied to the gate line 12 from the gate line driving circuit 30. The data line 11 is supplied with a video data voltage from the data line driving circuit 20. When the gate-on voltage is supplied to the gate line 12, the thin film transistor 13 is turned on, and the data voltage supplied to the data line 11 is transmitted to the pixel electrode 15 through the drain electrode 22 and the source electrode 23. A common voltage (Vcom) is supplied to the common electrode 16 from a common electrode drive circuit (not shown). The common electrode 16 overlaps the pixel electrode 15 with the insulating film 104 interposed therebetween, and an opening (slit) is formed in the pixel electrode 15. Thereby, the liquid crystal 301 is driven by the electric field from the pixel electrode 15 through the liquid crystal layer 300 to the common electrode 16 through the opening of the pixel electrode 15. An image is displayed by driving the liquid crystal 301 and controlling the transmittance of light transmitted through the liquid crystal layer 300. In the case of performing color display, the data line 11 connected to the pixel electrode 15 of each pixel 14 corresponding to the red portion, the green portion, the blue portion, etc. formed by the vertical stripe color filter is connected to a desired line. This is realized by supplying a data voltage. The driving method of the liquid crystal display device 1 is not limited to the above method, and a known method can be applied.

  FIG. 5 is a plan view showing a schematic configuration of the liquid crystal display device 1. In FIG. 5, the TFT substrate 100, the CF substrate 200, and the seal portion 60 for bonding the two substrates are shown, and other components are omitted. The seal part 60 is formed in a frame shape so as to surround the periphery of the display area for displaying an image. The seal portion 60 is made of, for example, a photocurable resin material, and is cured by irradiating light (for example, ultraviolet rays). The seal part 60 is interposed between the TFT substrate 100 and the CF substrate 200 to cure the seal part 60, whereby the TFT substrate 100 and the CF substrate 200 are bonded and fixed. Liquid crystal is injected and sealed between the TFT substrate 100 and the CF substrate 200 inside the seal portion 60. In addition, an opening for injecting liquid crystal inside the seal portion 60 may be provided in the seal portion 60.

  Specifically, as shown in FIG. 5, the seal portion 60 includes a first seal portion 61 and a second seal portion 62 extending in a direction orthogonal to the bending direction of the liquid crystal display device 1, and the bending of the liquid crystal display device 1. The third seal portion 63 and the fourth seal portion 64 that extend in a direction parallel to the direction are formed in a frame shape. The width W1 of the first seal portion 61 and the second seal portion 62 is larger than the width W2 of the third seal portion 63 and the fourth seal portion 64. The bending direction of the liquid crystal display device 1 may be a row direction as shown in FIG. 5 or a column direction as shown in FIG. The width W1 of the first seal portion 61 and the width W1 of the second seal portion 62 may be the same as or different from each other. Further, the width W2 of the third seal portion 63 and the width W2 of the fourth seal portion 64 may be the same or different from each other.

  7 is a cross-sectional view taken along the line CC of the liquid crystal display device 1 shown in FIG. The liquid crystal display device 1 shown in FIG. 7 has a curved outer shape that is convex in the display surface side and bent in the row direction. For example, the liquid crystal display device 1 has a shape with a center of curvature on the back side and a radius of curvature of 500 mm. The liquid crystal display device 1 may have a curved outer shape that is curved so that the back side is convex. Moreover, the specific numerical value of a curvature radius is not limited. For example, the seal portion 60 is disposed between the alignment film 105 of the TFT substrate 100 and the alignment film 205 of the CF substrate 200.

  Next, the results of verifying light leakage that occurs near the four corners of the display screen are shown below.

FIG. 8 illustrates a case where the width W1 of the first seal portion 61 and the second seal portion 62 and the width W2 of the third seal portion 63 and the fourth seal portion 64 are the same in the liquid crystal display device according to the comparative example. The light transmittance distribution is shown. FIG. 8B shows a liquid crystal display device in which the width of the seal portion 60 is set to W1 = W2 = 0.8 mm, the curvature radius is set to 500 mm, and bent in the row direction, from the center of the display screen to the upper right of the display screen. The result of having measured the transmittance | permeability of the light in the area | region is shown. As shown in FIG. 8B, it can be seen that the transmittance is high in the peripheral region with a peak at about 141 mm from the center of the display screen. The peak value of the transmittance was 0.002568, and the region where the transmittance was 0.0005 or more was 144 mm ² . That is, it can be seen that a large amount of light leakage occurs in the region.

  FIG. 9B is a graph showing a result of measuring a deviation amount (T / C deviation amount) between the TFT substrate and the CF substrate when the liquid crystal display device according to the comparative example is bent. As shown in FIGS. 9A and 9B, it can be seen that the T / C deviation amount is large in the region where the transmittance (light leakage amount) is high. Further, FIGS. 10A and 10B are diagrams showing stress distributions on the XY plane of the TFT glass substrate and the CF glass substrate constituting the liquid crystal display device according to the comparative example. As shown in FIGS. 10A and 10B, it can be seen that the stress is large in the region where the transmittance (light leakage amount) is high and the T / C deviation amount is large. For these reasons, when the width of the seal portion, in particular, the width W1 of the seal portion extending in the direction orthogonal to the bending direction of the liquid crystal display device (see FIG. 8A) is small, the T / C deviation amount is small. The stress is concentrated in a region where the amount of T / C deviation is large (see FIG. 10), and the light transmittance (light leakage due to the influence of the phase difference caused by the stress change is increased. It is inferred that the amount is high.

  Based on the above inference, in the liquid crystal display device 1 according to the present embodiment, the width W1 of the seal portions (the first seal portion 61 and the second seal portion 62) extending in the direction orthogonal to the bending direction of the liquid crystal display device 1. However, it has the structure larger than the width | variety W2 of the seal | sticker part (the 3rd seal | sticker part 63 and the 4th seal | sticker part 64) extended in the direction parallel to the said bending direction.

FIG. 11 shows the light when the width W1 of the first seal portion 61 and the second seal portion 62 is larger than the width W2 of the third seal portion 63 and the fourth seal portion 64 in the liquid crystal display device 1 according to the present embodiment. The transmittance distribution is shown. In FIG. 11B, the width of the first seal portion 61 and the second seal portion 62 is W1 = 3.0 mm, the width of the third seal portion 63 and the fourth seal portion 64 is W2 = 0.8 mm, and the curvature is In the liquid crystal display device 1 in which the radius is set to 500 mm and bent in the row direction, the result of measuring the light transmittance from the center of the display screen to the upper right region of the display screen is shown. Here, the peak value of the transmittance was 0.001702, and the region where the transmittance was 0.0005 or more was 51 mm ² . As shown in FIG. 11B, it can be seen that the transmittance is lower in the vicinity of 141 mm from the center of the display screen than in the case of the liquid crystal display device according to the comparative example (FIG. 8B). . That is, it can be seen that the amount of light leakage is reduced in the region.

  In FIG. 12, the width W1 of the first seal portion 61 and the second seal portion 62 is 0.8 mm (liquid crystal display device according to a comparative example), and 3.0 mm (liquid crystal display device 1 according to the present embodiment). It is the graph which compared the amount of T / C shift | offset | difference in the case of. As shown in FIG. 12, it can be seen that when W1 = 3.0 mm, the T / C shift amount is smaller over the entire region of the substrate. Further, FIGS. 13A and 13B are diagrams showing stress distributions in the XY plane of the TFT glass substrate and the CF glass substrate constituting the liquid crystal display device 1 according to the present embodiment. As shown in FIGS. 13A and 13B, W1 = 3.0 mm is more stressed than W1 = 0.8 mm (the liquid crystal display device according to the comparative example) (see FIG. 10). I understand that it is small.

  From the above, the width W1 of the seal portion extending in the direction orthogonal to the bending direction of the liquid crystal display device is increased. For example, the width W1 is larger than the width W2 of the seal portion extending in the direction parallel to the bending direction. By enlarging (W1> W2), the amount of T / C deviation is reduced (see FIG. 12B), stress in the glass substrate is dispersed and stress concentration is difficult to occur (see FIG. 13). It is presumed that the rate (light leakage amount) becomes low. Therefore, according to the liquid crystal display device 1 according to the present embodiment, light leakage that occurs in the vicinity of the four corners of the display screen can be reduced. In the liquid crystal display device 1, the width W2 of the third seal portion 63 and the fourth seal portion 64 is preferably 0.7 mm to 1.1 mm. Further, the width W1 of the first seal portion 61 and the second seal portion 62 is preferably 1.1 to 5.0 times the width W2.

  Next, a method for manufacturing the liquid crystal display device 1 according to the present embodiment will be described. The manufacturing process of the liquid crystal display device 1 includes a TFT substrate manufacturing process, a CF substrate manufacturing process, a substrate bonding process, a polarizing plate bonding process, a bending process, and a liquid crystal injection process.

  In the TFT substrate manufacturing process, a well-known process for realizing a configuration of a lateral electric field system (IPS system) can be applied. For example, a metal material to be the gate line 12 is formed on the first surface of the glass substrate 101 by sputtering and patterned by a photoetching process. Thereby, the gate line 12 is formed as a planar pattern. Next, the insulating film 102 is stacked so as to cover the gate line 12 by chemical vapor deposition CVD, and the semiconductor layer 21 is stacked on the insulating film 102. Further, a metal material to be the data line 11 is formed on the semiconductor layer 21 by sputtering. The data line 11 and the source electrode 23 are simultaneously formed using halftone exposure. Next, an insulating film 103 is laminated by CVD so as to cover the data line 11 and the source electrode 23. Next, after depositing ITO on the insulating film 103, the common electrode 16 is formed by photo-etching. Next, an insulating film 104 is formed by CVD so as to cover the common electrode 16. Further, the insulating film 103 and the insulating film 104 are dry-etched to form a through hole 24 that reaches the source electrode 23. After the ITO film is formed on the insulating film 104 and in the through hole 24 by sputtering, the pixel electrode 15 is formed by photoetching. The pixel electrode 15 is processed into a pattern having a slit. A part of the pixel electrode 15 is directly formed on the source electrode 23. Thereby, the pixel electrode 15 and the source electrode 23 are electrically connected.

  In the CF substrate manufacturing process, for example, the color filter 202 and the black matrix 203 are formed on the first surface of the glass substrate 201.

  In the substrate bonding step, a step of applying a sealing material (sealing part 60) to the TFT substrate 100 manufactured in the TFT substrate manufacturing step, an ODF step of dropping a liquid crystal material, and a TFT substrate 100 coated with the sealing material The CF substrate 200 manufactured in the CF substrate manufacturing process is aligned and bonded, and the sealing material is irradiated with light and cured.

  Here, in the step of applying the sealing material, the application speed when applying the sealing material (the first seal portion 61 and the second seal portion 62) extending in the direction orthogonal to the bending direction of the liquid crystal display device 1 is as follows. The coating speed is slower than the coating speed when the sealing material (the third seal portion 63 and the fourth seal portion 64) extending in the direction parallel to the bending direction is applied. As another method of applying the sealing material, the number of times of application when applying the sealing material (the first seal portion 61 and the second seal portion 62) extending in the direction orthogonal to the bending direction of the liquid crystal display device 1 is set. The number of times of application is larger than the number of times of application of the sealing material (the third seal part 63 and the fourth seal part 64) extending in a direction parallel to the bending direction. Accordingly, the width W1 of the first seal portion 61 and the second seal portion 62 can be made larger than the width W2 of the third seal portion 63 and the fourth seal portion 64. Note that the method for applying the sealing material is not limited to the above method, and the sealing material may be applied so as to satisfy W1> W2.

  In the polarizing plate attaching step, the polarizing plate 106 is attached on the second surface opposite to the first surface of the glass substrate 101, and the polarized light is applied on the second surface opposite to the first surface of the glass substrate 201. A plate 206 is pasted.

  In the bending step, the bonded TFT substrate 100 and CF substrate 200 are bent in a desired uniaxial direction (for example, a row direction or a column direction). The bending method is not limited, and a jig may be used or a heat shrink film may be used.

  Thereafter, the liquid crystal display device 1 is completed through an assembly process and an inspection process of the backlight device and the like.

  In the above description, a horizontal electric field type (IPS type) liquid crystal display device is taken as an example, but the present invention is not limited to this. The configuration of the seal portion 60 and the application method of the seal portion 60 described above can also be applied to various display devices such as liquid crystal display devices and organic EL display devices other than the lateral electric field method.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said each embodiment, The form suitably changed by those skilled in the art from said each embodiment within the range which does not deviate from the meaning of this invention. Needless to say, it is included in the technical scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 Liquid crystal display device, 10 Display panel, 20 Data line drive circuit, 30 Gate line drive circuit, 40 Control circuit, 50 Backlight apparatus, 60 Seal part, 61 1st seal part, 62 2nd seal part, 63 3rd seal Part, 64 4th seal part, 11 data line, 12 gate line, 13 thin film transistor, 14 pixel, 15 pixel electrode, 16 common electrode, 100 thin film transistor substrate, 101 glass substrate, 106 polarizing plate, 200 color filter substrate, 201 glass substrate , 206 Polarizing plate, 300 Liquid crystal layer.

Claims (7)

A display device having a curved display surface,
A first substrate bent in a first direction;
A second substrate bent in the first direction and disposed opposite to the first substrate;
A seal portion for bonding the first substrate and the second substrate;
The seal portion includes a first seal portion extending in a second direction orthogonal to the first direction, and a second seal portion extending in the first direction,
A width of the first seal portion in the first direction is larger than a width of the second seal portion in the second direction;
A display device characterized by that. The width of the first seal portion in the first direction is 1.1 to 5.0 times the width of the second seal portion in the second direction.
The display device according to claim 1. A first substrate bent in a first direction; a second substrate bent in the first direction and disposed opposite to the first substrate; and a liquid crystal layer sandwiched between the first substrate and the second substrate A horizontal electric field type liquid crystal display device that has a curved display surface and applies an electric field substantially parallel to the first substrate and the second substrate to the liquid crystal layer,
A seal portion for bonding the first substrate and the second substrate;
The seal portion includes a first seal portion extending in a second direction orthogonal to the first direction, and a second seal portion extending in the first direction,
A width of the first seal portion in the first direction is larger than a width of the second seal portion in the second direction;
A liquid crystal display device characterized by the above. The width of the first seal portion in the first direction is 1.1 to 5.0 times the width of the second seal portion in the second direction.
The liquid crystal display device according to claim 3. Manufacturing a first substrate;
Manufacturing a second substrate;
Applying a sealing material to the first substrate;
Bonding the second substrate to the first substrate coated with the sealing material;
Curing the sealing material;
Bending the first substrate and the second substrate in a first direction;
Including
In the step of applying the sealing material, the width of the first direction of the first sealing material applied in the second direction orthogonal to the first direction is the second width of the second sealing material applied in the first direction. Apply the sealing material to be larger than the width in the direction,
A manufacturing method of a display device characterized by the above. In the step of applying the sealing material, the application speed when applying the first sealing material is slower than the application speed when applying the second sealing material.
The method for manufacturing a display device according to claim 5. In the step of applying the sealing material, the number of times of application when applying the first sealing material is made larger than the number of times of application when applying the second sealing material.
The method for manufacturing a display device according to claim 5.