JP5305262B2 - Liquid crystal display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device capable of preventing deterioration in display quality and reduction in production yield, and a method of manufacturing the same. <P>SOLUTION: The liquid crystal display device includes an array substrate 200, a counter substrate 300 arranged oppositely to the array substrate 200, a liquid crystal layer 400 held between the array substrate 200 and counter substrate 300, a pair of alignment films 500 disposed on principal surfaces of the array substrate 200 and counter substrate 300 so as to be in contact with the liquid crystal layer 400, and a display area 120 composed of a plurality of pixels PX. The alignment films 500 each have a first area 510 arranged in the display area 120, and a second area 520 which is arranged in an area 130 outside the display area at least on a start end side in a rubbing direction S and in which the alignment film 500 decreases in thickness toward outside the display area 120 in the thickness direction of the alignment film 500. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a liquid crystal display device, and more particularly to an active matrix liquid crystal display device and a method for manufacturing the same.

  The liquid crystal display device has a configuration in which a liquid crystal layer containing liquid crystal molecules is held between an array substrate and a counter substrate. The array substrate has a plurality of pixel electrodes arranged in a matrix. The counter substrate has a counter electrode arranged so as to face the plurality of pixel electrodes. The plurality of pixel electrodes and the counter electrode are covered with a pair of alignment films that are rubbed in a predetermined direction. The alignment state of the liquid crystal molecules is controlled by the rubbing direction of the alignment film and the potential generated between the pixel electrode and the counter electrode.

  When there is no potential difference between the pixel electrode and the counter electrode, the liquid crystal molecules are aligned substantially parallel to the rubbing direction by the regulating force of the alignment film that has been rubbed in a predetermined direction. When an electric field is formed by a potential difference generated between the pixel electrode and the counter electrode, the liquid crystal molecules are aligned so that the major axis direction thereof is oriented substantially parallel to the electric field. As the alignment direction of the liquid crystal molecules changes, the modulation factor for the light transmitted through the liquid crystal layer changes. The liquid crystal display device selectively transmits light according to the modulation rate and displays an image.

Conventionally, as a method of rubbing the alignment film, a method of rubbing the alignment film with a rubbing cloth has been disclosed (for example, see Patent Document 1).
JP 2004-240142 A

  When the rubbing process is performed by rubbing the alignment film with a rubbing cloth, for example, a part of the rubbing cloth, a part of the alignment film, or the like may accumulate on the edge of the alignment film as a foreign substance. When the lump of foreign matter accumulated at the edge of the alignment film adheres to the alignment film again, rubbing streaks are generated in the alignment film due to the lump of foreign matter, and display quality may be deteriorated due to rubbing failure. In addition, if a lump of foreign matter adhering to the rubbing cloth adheres to the alignment film, the foreign matter may remain without being cleaned even by the substrate cleaning process, which may cause a reduction in manufacturing yield.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a liquid crystal display device capable of preventing display quality deterioration and manufacturing yield reduction and a method for manufacturing the same. .

The liquid crystal display device according to the first aspect of the present invention is held between a first substrate, a second substrate disposed so as to face the first substrate, and the first substrate and the second substrate. A liquid crystal layer, a pair of alignment films disposed on the main surfaces of the first substrate and the second substrate so as to be in contact with the liquid crystal layer, and a display region constituted by a plurality of pixels, and the alignment The film is disposed outside the display area at least at the start end side in the rubbing direction with the first area disposed in the display area, and the lower surface is a flat surface, and the display area in the thickness direction of the alignment film A second region in which the thickness of the alignment film decreases toward the outside of the first substrate, and the first substrate and the second substrate have a base portion serving as a base for the first region and the second region. and, the material serving as the base portion of the second region, prior to The liquid crystal display device which is formed by the material having low surface tension of a material serving as the base portion of the first region.

  According to a third aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, the step of forming a first substrate having a pixel electrode, the step of forming a second substrate having a counter electrode, and the pixel of the first substrate. A step of printing an alignment film on a main surface on which an electrode is formed and a main surface on which the counter electrode of the second substrate is formed by rotating a roller having an alignment film printing plate; and an alignment direction of liquid crystal molecules Rubbing the alignment film so as to regulate, and at least the edge of the alignment film printing plate at the start end in the rubbing direction has a thickness of the alignment film printing plate toward the outside of the alignment film printing plate. And an inclined surface inclined in the thickness direction of the alignment film printing plate.

  A method of manufacturing a liquid crystal display device according to a fourth aspect of the present invention includes a step of forming a first substrate having a pixel electrode, a step of forming a second substrate having a counter electrode, and the pixel of the first substrate. A step of forming an alignment film by rotating a roller having an alignment film printing plate on the main surface on which the electrode is formed and the main surface on which the counter electrode of the second substrate is formed; and regulating the alignment of liquid crystal molecules And a step of rubbing the alignment film so that the alignment film printing plate has a first printing area and a second printing area, and the second printing area is formed of the alignment film printing plate. The mesh density of the second printing area is formed at least at the edge on the start end side in the rubbing direction, and the mesh density of the second printing area is smaller than the mesh density of the first printing area.

  According to the present invention, it is possible to provide a liquid crystal display device and a method for manufacturing the same that can prevent display quality deterioration and manufacturing yield reduction.

  Hereinafter, a liquid crystal display device and a manufacturing method thereof according to an embodiment of the present invention will be described with reference to the drawings.

  First, the configuration of the liquid crystal display device according to the present embodiment will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the liquid crystal display device according to the present embodiment includes a liquid crystal display panel 100 having a substantially rectangular flat plate shape, and a backlight unit BL that irradiates the liquid crystal display panel 100.

  The liquid crystal display panel 100 includes a pair of substrates, that is, an array substrate (first substrate) 200 and a counter substrate (second substrate) 300, a liquid crystal layer 400 held between the array substrate 200 and the counter substrate 300, It is constituted by. The backlight unit BL is disposed on the array substrate 200 side with respect to the liquid crystal display panel 100, and illuminates the liquid crystal display panel 100 from the array substrate 200 side.

  The array substrate 200 and the counter substrate 300 of the liquid crystal display panel 100 are bonded together with a sealant 110. The liquid crystal display panel 100 includes a display area 120 that displays an image on the inner side surrounded by the sealing material 110. The display area 120 is composed of a plurality of pixels PX arranged in a matrix. In the case of a color display type liquid crystal display device, the plurality of pixels PX are configured by a red pixel PXR that displays red, a green pixel PXG that displays green, and a blue pixel PXB that displays blue.

  The array substrate 200 includes a plurality of scanning lines Y (1, 2, 3,..., M) arranged in the display region 120 so as to extend along the row direction H of the pixels PX, and the column direction V of the pixels PX. A plurality of signal lines X (1, 2, 3,..., N) arranged so as to extend along, and a switch element 220 arranged at the intersection of the signal line X and the scanning line Y in each pixel PX, A pixel electrode 230 disposed in each pixel PX and connected to the switch element 220.

  In addition, the liquid crystal display panel 100 includes a connection portion 131 disposed outside the display area 130 located outside the display area 120. The connecting portion 131 can be connected to a driving IC chip or a flexible wiring board that functions as a signal supply source. In the example shown in FIG. 1, the connection portion 131 is disposed on the extending portion 200 </ b> A of the array substrate 200 that extends outward from the end portion 300 </ b> A of the counter substrate 300.

  Each of the scanning lines Y (1, 2, 3,..., M) arranged in the display area 120 is connected to the connection unit 131 via the outside of the display area 130. Similarly, each of the signal lines X (1, 2, 3,..., N) is connected to the connection unit 131 via the outside display area 130.

  As shown in FIG. 2, the array substrate 200 includes an insulating substrate 210 having light transmissivity such as glass. The switch element 220 includes a thin film transistor (TFT) that is disposed on the insulating substrate 210 and includes a semiconductor layer (not shown) formed of, for example, amorphous silicon or polysilicon. The gate electrode 222 of the switch element 220 is disposed on the insulating substrate 210. The gate electrode 222 is connected to the scanning line Y.

  The semiconductor layer of the switch element 220 is disposed on a gate insulating film (not shown). A source electrode 225 and a drain electrode 227 of the switch element 220 are connected to the semiconductor layer. The source electrode 225 and the drain electrode 227 are covered with an insulating film 240. The insulating film 240 is made of, for example, a silicon nitride film (SiN).

  The pixel electrode 230 is disposed on the insulating film 240 corresponding to each pixel PX. The pixel electrode 230 is electrically connected to the drain electrode 227 through a contact hole formed in the insulating film 240. The pixel electrode 230 is formed of a light-transmissive conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).

  The counter substrate 300 includes an insulating substrate 310 having light transmissivity, such as glass, and a counter electrode 330 common to a plurality of types of pixels PX so as to oppose the pixel electrode 230 via the liquid crystal layer 400 in the display region 120. ing. On one main surface on the insulating substrate 310 (that is, the surface facing the liquid crystal layer 400), a black matrix 340 surrounding each pixel PX is disposed in the display region 120.

  Further, the counter substrate 300 includes a color filter layer 320 on one main surface on the insulating substrate 310 in the display region 120. The color filter layer 320 includes a red color filter 320R that transmits red main wavelength light corresponding to the red pixel PXR, and a green color filter 320G that transmits green main wavelength light corresponding to the green pixel PXG. Further, a blue color filter 320B that transmits light having a blue main wavelength corresponding to the blue pixel PXB is provided.

  The color filter layer 320 may be provided on the array substrate 200 side. In addition, the counter substrate 300 may include an overcoat layer disposed with a relatively thick film thickness that flattens the unevenness of the surface of the color filter layer 320.

  The counter electrode 330 is disposed in the display region 120 so as to face the pixel electrode 230 with the liquid crystal layer 400 interposed therebetween. The counter electrode 330 is disposed on the upper layer of the black matrix 340, that is, on the color filter layer 320. The counter electrode 330 is formed of a light-transmitting conductive material such as ITO or IZO, for example.

  The array substrate 200 and the counter substrate 300 are arranged with a predetermined gap by a spacer (not shown). The liquid crystal layer 400 is made of a liquid crystal material including liquid crystal molecules sealed in a gap.

  The array substrate 200 and the counter substrate 300 are respectively covered with a pair of alignment films 500 arranged so as to be in contact with the liquid crystal layer 400. That is, the alignment film 500 is disposed on the main surface of the array substrate 200 and the counter substrate 300 on the liquid crystal layer 400 side so as to be in contact with the liquid crystal layer 400. The alignment film 500 is rubbed so as to regulate the alignment of the liquid crystal molecules contained in the liquid crystal layer 400. The alignment direction of the liquid crystal molecules is regulated by the alignment film 500.

  Optical elements 260 and 360 are provided on the outer surfaces of the array substrate 200 and the counter substrate 300 (that is, the surface opposite to the surface in contact with the liquid crystal layer 400 of the array substrate 200 and the counter substrate 300), respectively. These optical elements 260 and 360 include a polarizing plate whose polarization direction is set in accordance with the characteristics of the liquid crystal layer 400.

  In the liquid crystal display device according to the present embodiment, the alignment film 500 includes a first region 510 and a second region 520 disposed in the display region 120. In the second region 520 arranged at the edge outside the display region 130, the thickness of the alignment film 500 decreases toward the outside of the display region 120 in the thickness direction of the alignment film 500. The second region 520 is formed at least at the edge on the start end side in the rubbing direction S. The direction toward the outside is a direction orthogonal to the end side of the display area 120. The inclination direction of the second region 520 is preferably substantially parallel to the rubbing direction S.

  As shown in FIG. 3, the edge of the alignment film 500 on the start end side in the rubbing direction S is an edge of the side 500A of the alignment film 500 when the rubbing direction S is parallel to the first direction D1. As shown in FIG. 4, the edge on the start side in the rubbing direction S is an edge of the side 500A and the side 500B of the alignment film 500 when the rubbing direction S is parallel to the second direction D2. That is, when the second direction D2 is divided into direction components D21 and D22 that are substantially parallel to the edge of the alignment film 500, the edge on the start end side in the rubbing direction S is the edge that is the start end side of these direction components D21 and D22. 500A and 500B. In the example shown in FIG. 2, the alignment film 500 has a second region 520 at the edge of the side 500 </ b> A on the start end side in the rubbing direction S.

  The width of the second region 520 is preferably 2 mm or more. The width of the second region 520 is the distance from the side of the alignment film 500 to the first region 510. The width of the second region 520 is, for example, the width (W1) of the second region 520 in the rubbing direction S in the case shown in FIG. In the case shown in FIG. 4, the width of the second region 520 is the width (W2) of the second region 520 extending substantially parallel to the direction component D21 in the rubbing direction S (D2) in the direction substantially parallel to the direction component D22. , And the width (W3) of the second region 520 extending substantially parallel to the direction component D22 in the direction substantially parallel to the direction component D21.

  By forming the second region 520 in the alignment film 500 in this way, the edge of the alignment film 500 becomes gentle. Accordingly, when the alignment film 500 is rubbed with a rubbing cloth, it is possible to prevent the edges of the alignment film 500 and the rubbing cloth from being scraped off, and it is possible to prevent the generation of foreign matters.

  Further, foreign matter does not accumulate at the edge of the alignment film 500, and it is possible to prevent the accumulated foreign matter lump from adhering to the rubbing cloth, thereby preventing the occurrence of rubbing lines. Thereby, rubbing failure can be prevented and display quality can be prevented from deteriorating.

  Furthermore, since no foreign matter accumulates at the edge of the alignment film 500, for example, a lump of foreign matter attached to the rubbing cloth does not adhere to the alignment film 500.

  That is, according to the liquid crystal display device according to the present embodiment, it is possible to prevent display quality degradation and manufacturing yield reduction.

  Here, an example of a manufacturing method of the liquid crystal display device according to the present embodiment will be described.

    First, an insulating substrate 210 for the array substrate 200 and an insulating substrate 310 for the counter substrate 300 are prepared. A signal line X, a scanning line Y, a switch element 220, a pixel electrode 230, and the like are formed on an insulating substrate 210 for the array substrate 200. This is referred to as an array substrate 200. A black matrix 340, a color filter layer 320, a counter electrode 330, and the like are formed on the insulating substrate 310 for the counter substrate 300. This is referred to as a counter substrate 300.

  Then, an alignment film material is applied to the roller 700 having the alignment film printing plate 600, and the roller 700 is rotated on the main surface of the array substrate 200 on which the pixel electrodes 230 are formed, as shown in FIG. An alignment film 500 having the second region 520 is formed. Next, the surface of the alignment film 500 that is in contact with the liquid crystal layer 400 is rubbed with a rubbing cloth.

  Similarly, the alignment film material is applied to the roller 700 having the alignment film printing plate 600 on the main surface of the counter substrate 300 on which the counter electrode 330 is formed, and the roller 700 is rotated to rotate the first area 510 and the second area. An alignment film 500 having 520 is formed. Next, the surface of the alignment film 500 that is in contact with the liquid crystal layer 400 is rubbed with a rubbing cloth.

  The array substrate 200 and the counter substrate 300 are bonded together, and a liquid crystal material is injected and sealed. Through such a process, a liquid crystal display device in which the liquid crystal layer 400 is held between the array substrate 200 and the counter substrate 300 is formed.

  In the above manufacturing method, an alignment film material is applied, and a roller 700 having an alignment film printing plate 600 is applied to a main surface on which the pixel electrode 230 of the array substrate 200 is formed and a main surface on which the counter electrode 330 of the counter substrate 300 is formed. When the roller 700 is rotated, the alignment film 500 having a pattern corresponding to the pattern of the alignment film printing plate 600 is formed.

  In the example shown in FIG. 5, at least the edge on the start end side in the rubbing direction S of the alignment film printing plate 600 has a thickness direction of the alignment film printing plate 600 such that the thickness of the alignment film printing plate 600 decreases toward the outside. It is formed on the inclined surface 630 inclined in the direction.

  The edge on the start end side in the rubbing direction S of the alignment film printing plate 600 is an edge corresponding to the edge on the start end side of the alignment film 500. That is, as shown in FIG. 6, when the rubbing direction S is parallel to the first direction D1, the edge on the start end side in the rubbing direction S is the edge of the side 600A of the alignment film printing plate 600. As shown in FIG. 7, when the rubbing direction S is parallel to the second direction D2, the edge on the start end side in the rubbing direction S is the edge of the sides 600A and 600B of the alignment film printing plate 600.

  That is, when the second direction D2 is divided into direction components D21 and D22 that are substantially parallel to the edge of the alignment film 500, the edge on the start end side in the rubbing direction S is the edge that is the start end side of these direction components D21 and D22. 500A and 500B. In the example shown in FIG. 5, the alignment film printing plate 600 has a side 600A on the start end side in the rubbing direction S and an inclined surface 630 at the edge of the side 600C facing the side 600A. Although not shown, the alignment film printing plate 600 may have inclined surfaces 630 on all sides.

  The roller 700 having such an alignment film printing plate 600 is coated with an alignment film material, and the roller 700 is formed on the main surface of the array substrate 200 where the pixel electrodes 230 are formed and the main surface of the counter substrate 300 where the counter electrodes 330 are formed. , The alignment film 500 having the second region 520 corresponding to the inclined surface 630 of the alignment film printing plate 600 is formed.

  According to such a manufacturing method, at least the edge of the alignment film 500 on the start end side in the rubbing direction S is gently formed. For this reason, when the alignment film 500 is rubbed with a rubbing cloth, it is possible to prevent the edges of the alignment film 500 and the rubbing cloth from being scraped off, and to prevent the generation of foreign matters. As a result, it is possible to prevent a lump of foreign matter from adhering to the rubbing cloth, and it is possible to prevent the occurrence of rubbing lines. Thereby, rubbing failure can be prevented and display quality can be prevented from deteriorating.

  Furthermore, according to such a manufacturing method, foreign matter does not accumulate on the edge of the alignment film 500, and therefore, for example, a lump of foreign matter attached to the rubbing cloth does not adhere to the alignment film 500. That is, according to the manufacturing method of the liquid crystal display device according to the present embodiment, it is possible to prevent display quality deterioration and manufacturing yield reduction.

  Next, a liquid crystal display device and a method for manufacturing the liquid crystal display device according to the second embodiment of the present invention will be described. In the following description, the same reference numerals are given to the same configurations as those of the liquid crystal display device and the liquid crystal display device manufacturing method according to the first embodiment described above, and the description thereof is omitted.

  The liquid crystal display device according to the present embodiment is the same as the liquid crystal display device according to the first embodiment described above. In the method for manufacturing a liquid crystal display device according to the present embodiment, as shown in FIG. 8, the alignment film printing plate 600 has a first printing region 610 and a second printing region 620. The second printing region 620 is formed at least on the edge of the alignment film printing plate 600 on the start end side in the rubbing direction S. The mesh density of the second print area 620 is smaller than the mesh density of the first print area 610. In the example shown in FIG. 8, the alignment film printing plate 600 has a side 600A on the start end side in the rubbing direction S and a second printing region 620 on the edge of the side 600C facing the side 600A.

  The roller 700 having such an alignment film printing plate 600 is coated with an alignment film material, and the roller 700 is formed on the main surface of the array substrate 200 where the pixel electrodes 230 are formed and the main surface of the counter substrate 300 where the counter electrodes 330 are formed. , The alignment film 500 having the second region 520 is formed in a region corresponding to the second print region 620 having a small mesh density.

  Even in such a manufacturing method, the edges are gently formed, and it is possible to prevent the generation of foreign matters during the rubbing process. Even in such a configuration, a lump of foreign matter does not accumulate on the edge of the alignment film 500. That is, the same effect as the liquid crystal display device according to the first embodiment described above can be obtained.

  Next, a liquid crystal display device according to a third embodiment of the present invention will be described below. In the liquid crystal display device according to the present embodiment, as shown in FIG. 9, the array substrate 200 has a base portion 280 that is disposed outside the display region 130 and serves as a base for the second region 520 of the alignment film 500. The counter substrate 300 includes a base portion 380 that serves as a base for the second region 520 of the alignment film 500.

  The width of the base region 280 (380) in the direction of decreasing the thickness of the second region 520 is formed larger than the width of the direction of decreasing thickness of the second region 520 in consideration of the deviation from the second region 520. Has been. The base portion 280 (380) is formed of a material having a surface tension lower than that of the base material serving as the base of the first region 510 of the alignment film 500, for example, a material having a surface tension lower than that of ITO.

  The alignment film 500 extends thinly on a material having a small surface tension. For this reason, the film thickness of the alignment film 500 disposed on the base portion 280 (380) having a small surface tension is smaller than the film thickness of the alignment film 500 disposed on the first region 510. That is, the second region 520 is formed in the alignment film 500 by forming the base portion 280 (380) serving as the base of the second region 520 of the alignment film 500 with a material having a low surface tension.

  Even in such a configuration, the edges are gently formed, and foreign matters can be prevented from being generated during the rubbing process. Even in such a configuration, a lump of foreign matter does not accumulate on the edge of the alignment film 500. That is, the same effect as the liquid crystal display device according to the first embodiment described above can be obtained.

  Next, a liquid crystal display device according to a fourth embodiment of the present invention is described. In the liquid crystal display device according to the present embodiment, as shown in FIG. 10, the array substrate 200 has a recess 290 at least outside the display region 130 on the start end side in the rubbing direction S. Further, the counter substrate 300 has a recess 390 at least outside the display area 130 on the start end side in the rubbing direction S. The recess 290 is formed on the main surface P of the array substrate 200 where the pixel electrode 230 is formed. The recess 390 is formed on the main surface P of the counter substrate 300 on which the counter electrode 330 is formed. In addition, the alignment film 500 includes a first region 510 disposed in the display region 120 and an end portion 530 disposed on the recess 290 (390).

  When the alignment film 500 is formed on the main surface P of the array substrate 200 and the counter substrate 300, the distance from the main surface P of the array substrate 200 and the counter substrate 300 to the upper surface of the alignment film 500 is larger than that of the first region 510. The end portion 530 is smaller.

  Note that the bottom surfaces of the recesses 290 (390) may be formed to be inclined in the thickness direction of the array substrate 200 and the counter substrate 300 so that the thicknesses of the array substrate 200 and the counter substrate 300 become thinner toward the outside. desirable.

  Even in such a configuration, the edges are gently formed, and foreign matters can be prevented from being generated during the rubbing process. Even in such a configuration, a lump of foreign matter does not accumulate on the edge of the alignment film 500. That is, the same effect as the liquid crystal display device according to the first embodiment described above can be obtained.

  As described above, according to the liquid crystal display device and the manufacturing method thereof according to the present embodiment, it is possible to provide a liquid crystal display device and a manufacturing method thereof that can prevent deterioration in display quality and a decrease in manufacturing yield. Become.

  In addition, this invention is not limited to the said embodiment itself, In the stage of implementation, it can change and implement a component within the range which does not deviate from the summary. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

  The liquid crystal display device according to this embodiment is a transmissive liquid crystal display device, but the present invention is not limited to this example, and the present invention may be applied to a reflective liquid crystal display device and a transflective liquid crystal display device. .

FIG. 1 is a diagram schematically showing a configuration example of a liquid crystal display panel of a liquid crystal display device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the liquid crystal display panel taken along the line A-A ′ shown in FIG. 1. FIG. 3 is a plan view showing an edge on the start end side in the rubbing direction of the alignment film. FIG. 4 is a plan view showing an edge on the start end side in the rubbing direction of the alignment film. FIG. 5 is a diagram schematically showing the structure of the alignment film printing plate of the liquid crystal display device according to the present embodiment. FIG. 6 is a plan view showing an edge on the start end side in the rubbing direction of the alignment film printing plate. FIG. 7 is a plan view showing an edge on the start end side in the rubbing direction of the alignment film printing plate. FIG. 8 is a diagram schematically showing the structure of the alignment film printing plate of the liquid crystal display device according to the second embodiment. FIG. 9 is a cross-sectional view schematically showing the structure of the array substrate and the alignment film of the liquid crystal display device according to the third embodiment. FIG. 10 is a cross-sectional view schematically showing the structure of the array substrate and the alignment film of the liquid crystal display device according to the fourth embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 200 ... Array substrate 300 ... Counter substrate 400 ... Liquid crystal layer 500 ... Alignment film 510 ... 1st area | region 520 ... 2nd area | region S ... Rubbing direction

Claims (1)

A first substrate;
A second substrate disposed to face the first substrate;
A liquid crystal layer held between the first substrate and the second substrate;
A pair of alignment films disposed on the main surfaces of the first substrate and the second substrate so as to be in contact with the liquid crystal layer;
A display area composed of a plurality of pixels,
The alignment film is disposed outside the display area at least at the start side in the rubbing direction with the first area disposed in the display area, and the lower surface is a flat surface in the thickness direction of the alignment film. A second region in which the thickness of the alignment film decreases toward the outside of the display region,
The first substrate and the second substrate each have a base portion serving as a base for the first region and the second region,
The liquid crystal display device, wherein the material that becomes the base portion of the second region is formed of a material having a surface tension smaller than that of the material that becomes the base portion of the first region.

Images