JP2010060994A - Liquid crystal display element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal panel which suppresses uneven display while obtaining good moving image display. <P>SOLUTION: A polymerized compound layer 45 for controlling the tilt angle of a director LC of a liquid crystal material 14a is formed on an outermost surface on the side of a liquid crystal layer 14, of an array substrate 12. A structure 43 is protruded from the array substrate 12 along a position on the side of the liquid crystal layer 14, of a sealing part 17. A tilt angle can be given to the director LC over an entire pixel by the polymerized compound layer 45, so that good moving image display can be obtained. Elution of the sealing part 17 to the liquid crystal layer 14 is suppressed during manufacturing to prevent the director LC in the vicinity of the sealing part 17 from having a tilt angle different from a design angle, so that uneven display can be suppressed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device including a polymerizable compound layer that controls the tilt angle of liquid crystal molecules of a liquid crystal material.

  2. Description of the Related Art Conventionally, a display device using a liquid crystal display element, that is, a liquid crystal panel has features such as light weight, thinness, and low power consumption, and thus is applied to various fields such as OA equipment, information terminals, watches, and television receivers. ing.

  In particular, a liquid crystal panel using a thin film transistor (TFT element) is used for a data display monitor such as a portable television receiver or a computer because of its responsiveness.

  In recent years, with the increase in the amount of information and the display of moving images, high definition, high speed response, and wide viewing angle characteristics of liquid crystal panels have begun to be required.

  In response to such demands, high definition has been addressed by miniaturization of the TFT array structure. As for high-speed response, OCB method using nematic liquid crystal, VAN method, HAN method, π alignment method, interfacial stable ferroelectric liquid crystal (SSFLC) method using smectic liquid crystal, anti-ferroelectric liquid crystal (AFLC) ) Method is being studied. Furthermore, wide viewing angle characteristics have been improved by devising liquid crystal driving methods such as IPS, VAN, and OCB methods.

  In particular, in the VAN mode, the rubbing alignment process step, which has been concerned about the cause of defects such as electrostatic breakdown, has been eliminated due to the fact that a faster response than the conventional twisted nematic (TN) mode is obtained and the vertical alignment process is adopted. It has been attracting attention in recent years because it is possible. Furthermore, since the viewing angle compensation design is relatively easy, a wide viewing angle can be realized as a multi-domain VAN mode (hereinafter abbreviated as MVA mode).

  Here, as a means for alignment division in the MVA mode, a method of forming a structure projecting like a bowl or a missing portion (slit) of an electrode on one or both substrates is common.

  When a nematic liquid crystal material exhibiting negative dielectric anisotropy is used, in the slit formed in the pixel electrode, the electric field is inclined to the outside of the slit due to the electric field discrete effect, so that the liquid crystal molecules are inclined to the inside of the slit. On the other hand, on the counter substrate side, the liquid crystal molecules are inclined to the outside of the protrusion due to the shape effect of the structure. Therefore, it is possible to satisfactorily divide the alignment by combining both substrates so that the tilt directions of the liquid crystal molecules are aligned.

  In addition, it is possible to divide the liquid crystal layer into a plurality of domains by providing the slit pattern and the protrusion pattern with anisotropy in a plurality of different directions. As an example, the slit of the pixel electrode and the structure on the counter substrate side can be formed so as to have anisotropy in four directions at an angle of approximately 45 ° with respect to the edge and approximately 90 ° different from each other.

  By the way, with the recent expansion of moving image distribution, response characteristics of moving images are regarded as particularly important as requirements for liquid crystal panels. Although the MVA mode has better response characteristics of the liquid crystal than the conventional TN mode, the response characteristics are insufficient for displaying a moving image, particularly in a halftone.

  In order to improve this, measures such as overdrive driving that temporarily applies a high voltage in the first half of the frame have been taken for liquid crystal panels for television receivers. Problems such as increased costs due to the drive circuit have occurred.

  When the response characteristics of the liquid crystal molecules in the MVA mode were analyzed, the response of the liquid crystal molecules started immediately after voltage application at the saddle-like structure and the edge of the pixel electrode, and an intermediate portion between the saddle-like structure and the edge of the pixel electrode. It was found that the response of the liquid crystal molecules propagates toward the surface, that is, the response at the intermediate portion between the cage structure and the edge of the pixel electrode is slow. For this reason, if the response characteristic at the intermediate portion between the bowl-shaped structure and the edge of the pixel electrode is improved, a good moving image display can be obtained.

For improving the response of the MVA mode, there is a method (PSA method) in which a PSA (Polymer Sustained Alignment) layer made of a polymerizable compound is formed on the alignment layer. In the PSA method, a polymerizable monomer mixed in a liquid crystal is exposed to a voltage applied after being injected into a liquid crystal panel, whereby the monomer is cured and polymerized. At this time, the liquid crystal molecules aligned substantially perpendicular to the substrate surface are given a tilt angle, that is, a tilt angle by the PSA layer. Propagation process from the saddle-like structure that has been a cause of slow response can be eliminated, and response characteristics can be improved (see, for example, Patent Document 1).
JP 2007-121721 A

  By the way, the liquid crystal injection method to the liquid crystal panel is a vacuum injection method in which the inside of the liquid crystal panel is evacuated and injected using the differential pressure, and a drop injection method in which a predetermined amount of liquid crystal is dropped onto the substrate and the substrate is bonded. There is.

  In the vacuum injection method, the liquid crystal injection port is sealed with a sealant made of a photocurable resin (ultraviolet curable resin), and in the dropping injection method, a photocurable resin is generally used as an adhesive for bonding substrates. It is.

  For this reason, since these sealing agents or adhesives are in contact with the liquid crystal layer before curing in the manufacturing process, the adhesive component may elute into the liquid crystal layer and cause defects such as unevenness.

  In particular, in the PSA method, since the tilt angle imparted to the liquid crystal molecules depends on the monomer amount and the monomer type, when the peripheral sealing agent or the adhesive monomer elutes in the liquid crystal layer, the amount of the PSA monomer mixed in advance is mixed. The tilt angle of the liquid crystal molecules in the vicinity of the sealant or the adhesive is affected, and only the liquid crystal molecules in the vicinity of the sealant or the adhesive are given a tilt angle different from the design value. -There is a problem that the transmittance curve varies depending on the location and may be identified as display unevenness.

  The present invention has been made in view of these points, and an object of the present invention is to provide a liquid crystal display element that suppresses display unevenness while obtaining good moving image display.

  The present invention is formed of an array substrate having a plurality of pixels arranged in a matrix, a counter substrate disposed opposite to the array substrate, and a liquid crystal material containing liquid crystal molecules, and is disposed between the array substrate and the counter substrate. An intervening liquid crystal layer, an adhesive layer for bonding the array substrate and the counter substrate, and an outermost surface on the liquid crystal layer side of at least one of the array substrate and the counter substrate; A polymerizable compound layer for controlling the tilt angle of the liquid crystal molecules, and protruding from at least one of the array substrate and the counter substrate along at least part of the position of the adhesive layer on the liquid crystal layer side. And a formed structure.

  Then, a polymerizable compound layer for controlling the tilt angle of the liquid crystal molecules of the liquid crystal material is formed on the outermost surface of at least one of the array substrate and the counter substrate, and the position of the adhesive layer on the liquid crystal layer side A structure is formed along at least a part of the structure.

  According to the present invention, the polymerizable compound layer can give an inclination angle to the liquid crystal molecules over the entire pixel, and can provide a good moving image display, and also suppresses the adhesion layer from eluting into the liquid crystal layer during manufacturing. And it can suppress that the liquid crystal molecule | numerator of the vicinity of an contact bonding layer is set to the inclination angle different from a design, and can suppress display nonuniformity.

  Hereinafter, the configuration of the liquid crystal display element according to the first embodiment of the present invention will be described with reference to the drawings.

  In FIG. 1, reference numeral 11 denotes a liquid crystal display element which is a transmissive and active matrix type multi-domain VAN mode (MVA mode) display element as a substrate device, that is, a liquid crystal panel. 12 and a counter substrate 13 are arranged to face each other, and a liquid crystal layer 14 as a light modulation layer formed by a liquid crystal material 14a having a plurality of directors LC that are liquid crystal molecules is interposed between the substrates 12 and 13, In addition, a gap (distance) between the substrates 12 and 13, that is, a gap, is held by a plurality of spacers 15 which are gap holding members formed of, for example, resin. Furthermore, the array substrate 12 and the counter substrate 13 are bonded together by a seal portion 17 as an adhesive layer surrounding the periphery of the rectangular display region 16. In the liquid crystal panel 11, polarizing plates 18 and 19 are attached to the array substrate 12 and the counter substrate 13. Further, on the back side of the liquid crystal panel 11, a backlight which is a surface light source (not shown) is arranged.

  As shown in FIGS. 1 to 4, the array substrate 12 is formed on a transparent substrate as a light-transmitting and insulating array substrate body, that is, on the main surface of the glass substrate 21 on the liquid crystal layer 14 side, for example, molybdenum (Mo). The scanning line 22 formed by the above, the gate electrode 23 protruding from the scanning line 22, and the auxiliary capacitance line (not shown) are patterned, and covers the scanning line 22, the gate electrode 23 and the auxiliary capacitance line. A gate insulating film 25 such as a silicon oxide film is formed. On the gate insulating film 25, a semiconductor layer 26 such as non-doped amorphous silicon (a-Si) and a low-resistance semiconductor layer (contact layer) 27 such as phosphorus-doped amorphous silicon are provided corresponding to the position of the gate electrode 23. In addition to being laminated, an etching protection layer 29 such as a silicon nitride film is formed. Further, a signal line 31, a drain electrode 32 protruding from the signal line 31, and an island-like source electrode 33 are formed so as to cover a part of the low-resistance semiconductor layer 27 and the etching protection layer 29. The gate electrode 23, the semiconductor layer 26, the low resistance semiconductor layer 27, the drain electrode 32, the source electrode 33, and the like form a thin film transistor (TFT) 35 as a switching element. Further, an insulating protective film 37 such as a silicon nitride film is formed so as to cover the signal line 31, the drain electrode 32, and the source electrode 33. On the glass substrate 21, for example, a transparent conductive material such as ITO (Indium Tin Oxide) is formed with a pixel electrode 42 that is a transparent electrode constituting the pixel (sub-pixel) 41, and the scanning line 22 The spacer 15 is disposed at a position intersecting with the signal line 31. A bank-like structure 43 is formed on the glass substrate 21 along the inner edge of the display region 16. Further, on the protective film 37, an alignment film 44 for light distribution of the director LC and a polymerizable compound layer 45 for controlling the tilt angle, that is, the tilt angle of the director LC are sequentially formed.

  The scanning lines 22 and the signal lines 31 are formed in a lattice shape between the pixels 41.

  In each thin film transistor 35, the source electrode 33 is connected to the pixel electrode 42, and switching control is performed by applying a signal from the gate driver 46 that is a scanning line driving circuit to the gate electrode 23 through the scanning line 22, By applying a voltage to the pixel electrode 42 in response to a signal input from the source driver 47, which is a signal line driving circuit, via the signal line 31, the pixels 41 are controlled to be turned on / off independently. .

  The pixel electrodes 42 are arranged in a matrix in the display region 16, are formed in a substantially rectangular shape of, for example, about 40 μm × 120 μm in plan view, and positions corresponding to the thin film transistors 35 are cut out in a square shape. It becomes the notch part 42a. Further, in the vicinity of the notch portion 42a of each pixel electrode 42, a contact hole which is a concave pattern (not shown) for electrically connecting each pixel electrode 42 to the source electrode 33 of each thin film transistor 35 is formed. Further, a slit 49 of about 10 μm, for example, is formed between the pixel electrodes 42 and 42 adjacent to each other.

  The structure 43 suppresses that when the seal portion 17 is eluted into the liquid crystal layer 14 before curing, the eluted seal portion 17 affects the control of the tilt angle of the director LC by the polymerizable compound layer 45. For this purpose, it is in close contact with the inner edge of the seal portion 17 and is formed in a rectangular frame shape continuous over the entire inner edge. For example, it is formed of the same material as the spacer 15 at the same time as the spacer 15 in the same process. . The structure 43 is formed so as to contact not only the array substrate 12 side but also the counter substrate 13 side.

  The polymerizable compound layer 45 is also called a PSA (Polymer Sustained Alignment) layer, and is formed of, for example, an acrylic photo-curing resin or the like, is formed transparent in the visible light region, and is the outermost layer on the liquid crystal layer 14 side of the array substrate 12. Located on the surface. In other words, the polymerizable compound layer 45 is in contact with the liquid crystal material 14 a of the liquid crystal layer 14.

  On the other hand, as shown in FIGS. 1 and 2, the counter substrate 13 is a thin film transistor 35 on the side of the array substrate 12 on one main surface of a transparent substrate, that is, a glass substrate 51 as a counter substrate body having translucency and insulation. The color filter layer 52 as a colored layer having colored portions 52r, 52g, and 52b corresponding to red (R), green (G), and blue (B) is formed in, for example, stripes at positions corresponding to . Further, a counter electrode 53 that is a common electrode (transparent electrode) formed of a transparent conductive material such as ITO (Indium Tin Oxide), for example, is formed so as to cover the color filter layer 52. A frame portion 54 that is a light shielding portion is formed around the periphery. An alignment film 55 is formed so as to cover the counter electrode 53.

  In the counter electrode 53, protrusions that are bowl-shaped structures, that is, counter protrusions 57, are formed at positions corresponding to the respective pixels 41. The opposing protrusion 57 is formed in a longitudinal shape along a substantially central position in the left-right direction of the pixel electrode 42.

  The counter projection 57 divides the liquid crystal layer 14 into a plurality of, for example, two types of domains D1 and D2 at positions corresponding to the respective pixels 41. That is, these domains D1 and D2 are formed adjacent to each other in the width direction of each pixel electrode. Here, the directors LC of the liquid crystal layer 14 located in the domains D1 and D2 are inclined such that the direction of tilting when a voltage is applied is such that the counter substrate 13 side is on the counter projection 57 side.

  The frame portion 54 is formed in a frame shape along the inner edge portion of the seal portion 17 by a light-shielding member.

  The liquid crystal layer 14 is a light modulation layer formed of a predetermined liquid crystal material, and is interposed between the polymerizable compound 45 on the array substrate 12 side and the alignment film on the counter substrate 13 side. The liquid crystal layer 14 has negative dielectric anisotropy. The director LC is controlled by the alignment films 44 and 55 so that the alignment direction is substantially perpendicular to the substrate surface.

  Further, the spacer 15 is formed in a columnar shape using, for example, a transparent resin having no conductivity.

  Further, the seal portion 17 is formed in a frame shape along the outside of the display region 16 by, for example, an ultraviolet curable resin (photo curable resin).

  The polarizing plates 18 and 19 are arranged so that one transmission axis is in the horizontal direction in the figure and the other transmission axis is in the vertical direction in the figure. Therefore, the polarizing plates 18 and 19 are crossed Nicol polarizing plates whose transmission axes are substantially orthogonal to each other, and the transmission axes of the polarizing plates 18 and 19 and the optical axis of the director LC of the liquid crystal layer 14 are about 45. Configured to cross at °.

  Next, the operation of the first embodiment will be described.

  Here, the liquid crystal panel 11 is manufactured by repeating film formation and patterning using a general process.

  That is, first, a member such as molybdenum is formed on the glass substrate 21 of the array substrate 12 by sputtering or the like with a film thickness of 0.3 μm, for example (first film formation step), and the scanning line 22 (gate is formed by photolithography or the like. The electrode 23) and the auxiliary capacitance line are patterned into a predetermined shape (pattern forming step).

  A gate insulating film 25 made of, for example, a 0.15 μm-thick silicon oxide, a semiconductor layer 26 made of amorphous silicon, a low-resistance semiconductor layer 27, and an etching protective layer 29 made of silicon nitride are formed thereon (the first layer). 2 film forming step).

  Thereafter, for example, aluminum (Al) is formed by sputtering with a film thickness of about 0.3 μm, and the signal line 31 (drain electrode 32) and the island-shaped source electrode 33 are simultaneously formed by photolithography, whereby the thin film transistor 35 is obtained. (Thin film transistor (switching element) forming step).

  Further, an insulating protective film 37 made of silicon nitride or the like is formed on the upper layer of the thin film transistor 35 (protective film forming step).

  Thereafter, for example, ITO is sputtered to a film thickness of about 0.1 μm to form the pixel electrode 42 (pixel electrode forming step), and then, for example, the height dimension is 4.0 μm at the intersection of the scanning line 22 and the signal line 31. The spacer 15 made of the photosensitive resin material is formed (spacer forming step). The slit 49 between the pixel electrodes 42 and 42 has a width dimension of about 10 μm, for example.

  Simultaneously with this spacer forming step, a bank-like structure 43 having a predetermined height is formed around the display region 16 with the same material as the spacer 15 (structure forming step).

  On the other hand, a photosensitive resist in which a red pigment was dispersed was applied on the glass substrate 51 of the counter substrate 13, and a red colored portion 52r was formed by photolithography. Similarly, by forming the green colored portion 52g and the blue colored portion 52b, the color filter layer 52 having a film thickness of, for example, about 1.0 μm is formed (color filter layer (colored layer) forming step).

  After that, for example, ITO is sputtered with a film thickness of about 0.1 μm to form the counter electrode 53 (counter electrode forming step), and then the frame portion 54 is formed with a black resin resist (frame portion forming step), and the resin-made Using a resist, a hook-shaped opposing protrusion 57 is simultaneously formed in parallel with the long side of the pixel electrode (opposing protrusion forming step). The opposing protrusion 57 has a width of about 10 μm, for example.

  Further, the alignment films 44 and 55 are applied to the array substrate 12 and the counter substrate 13 with a thickness of, for example, 70 nm (alignment film application process).

  Thereafter, on the array substrate 12, an adhesive made of an ultraviolet curable resin is applied to the outside of the structure 43, the liquid crystal material 14a having a negative dielectric anisotropy, and a UCL− having a liquid crystal ratio of 2 wt% as a polymerizable monomer. A mixture of 011 (Dainippon Ink Chemical Co., Ltd.) and IRGACURE 651 (benzyldimethyl ketal (2,2-dimethoxy-1,2-diphenylethane-1-one), Ciba Geigy Japan) as a photoinitiator Then, the array substrate 12 and the counter substrate 13 are bonded to each other at a predetermined position by the seal portion 17 in which a predetermined amount is dropped and an adhesive made of an ultraviolet curable resin is cured (bonding step).

  Further, by applying an alternating voltage of 5 V and irradiating ultraviolet rays having a wavelength of, for example, 365 nm from the array substrate 12 side for a predetermined time, for example, 3 minutes, the director LC of the liquid crystal layer 14 is aligned with the alignment films 44, 55. The orientation is controlled in a direction substantially perpendicular to the substrate surfaces of the glass substrates 21 and 51 by the polymerizable compound layer 45 (light distribution control step).

  Then, the polarizing plates 18 and 19 are attached to the glass substrates 21 and 51 of the liquid crystal panel 11 (polarizing plate attaching step), and the liquid crystal panel 11 is completed.

  As described above, in the first embodiment, the polymerizable compound layer 45 that controls the tilt angle of the director LC of the liquid crystal material 14a is formed on the outermost surface on the liquid crystal layer 14 side between the substrates 12 and 13. The structure 43 is formed so as to protrude from the array substrate 12 in a bank shape along the position of the seal portion 17 on the liquid crystal layer 14 side.

  For this reason, the polymerizable compound layer 45 can provide the designed tilt angle to the director LC over the entire pixel 41 from the vicinity of the opposing protrusion 57 to the edge of the pixel electrode 42, thereby obtaining a good moving image display. it can. Further, in the so-called PSA method for forming the polymerizable compound layer 45 that is a PSA layer, the tilt angle imparted to the director LC depends on the monomer amount and the monomer type. In the present embodiment, when the elution is performed, the amount of the monomer for PSA previously mixed when the polymerizable compound layer 45 is formed becomes larger and the tilt angle of the director LC in the vicinity of the seal portion 17 may be affected. Then, the bank-like structure 43 suppresses the elution of the monomer from the adhesive of the seal part 17 during the manufacture of the liquid crystal panel 11 to the liquid crystal layer 14, and the director LC in the vicinity of the seal part 17 is tilted differently from the design. Setting the corners can be suppressed, and display unevenness in the periphery of the display area 16 can be suppressed.

  Further, even in the intermediate region between the edge of the saddle-like counter projection 57 and the pixel electrode 42, which is slow in response in the conventional MVA mode, the response can be improved and the response of low gradation can be improved. It is possible to provide the liquid crystal panel 11 having good moving image display characteristics at a low cost without display defects at a viewing angle and an oblique viewing angle.

  In the first embodiment, as in the second embodiment shown in FIG. 5, the structure 43 is brought into contact only with the array substrate 12 side and not with the counter substrate 13 side. Not only can the same effect as the first embodiment described above be obtained, but also the structure 43 does not contact the counter substrate 13 side, so that the structure 43 is spaced from the substrates 12 and 13 set by the spacer 15. Therefore, it is not necessary to strictly control the height dimension of the structure 43 during manufacturing. In this case, the structure 43 is preferably set to a height dimension that is at least half of the gap between the substrates 12 and 13.

  In each of the above embodiments, the structure 43 may be formed only on the counter substrate 13 side. In this case, the distal end side of the structure 43 may or may not be in contact with the array substrate 12 side.

  Further, as in the third embodiment shown in FIG. 6, the structure 43 is composed of a structure 43a formed on the array substrate 12 side and a structure 43b formed on the counter substrate 13 side. The bodies 43a and 43b may be formed at positions shifted from each other, in other words, at positions that do not overlap each other. In this case, the top ends of the structures 43a and 43b are wrapped in the thickness direction of the liquid crystal panel 11, in other words, the sum of the heights of the structures 43a and 43b is greater than the gap between the substrates 12 and 13. It is more preferable to set the height dimension so that the height of each of the structures 43a and 43b becomes half or more of the gap between the substrates 12 and 13 so as to be larger. Further, the double-formed bank-like structures 43a and 43b affect the control of the tilt angle of the director LC in the polymerizable compound layer 45 by the seal portion 17 eluted into the liquid crystal layer 14. Not only can this be surely prevented, but the positions of the structures 43a and 43b are misaligned so that the tips of the structures 43a and 43b do not contact each other and change the gap between the substrates 12 and 13. Therefore, it is not necessary to strictly control the height dimension during manufacturing so that the tip ends of these structures 43a and 43b do not contact each other. In the third embodiment, the structures 43a and 43b are not only brought into contact with the array substrate 12 side or the counter substrate 13 side, respectively, but also on both the array substrate 12 side and the counter substrate 13 side. You may make it contact. Alternatively, the structure 43b may be formed on the seal portion 17 side, and the structure 43a may be formed on the inside thereof. Furthermore, the structures 43a and 43b may be formed at positions where they overlap each other.

  In each of the above embodiments, the polymerizable compound layer may be formed only on the outermost surface of the counter substrate 13 on the liquid crystal layer 14 side, or on the liquid crystal layer 14 side of each of the array substrate 12 and the counter substrate 13. It may be formed on the outermost surface.

  Further, in each of the above embodiments, the structure 43 may be separated from the inside of the seal portion 17 as long as it is positioned between the seal portion 17 and the pixel 41 side.

  Then, Example 1 corresponding to the first embodiment, Example 2 corresponding to the second embodiment, Example 3 corresponding to the third embodiment, and Conventional example are supported. The characteristic evaluation performed for Comparative Example 1 and Comparative Example 2 is shown in the table of FIG.

  In this characteristic evaluation, for example, the contrast ratio calculated by measuring the luminance when 0 V and 5 V are applied, the response speed when the transmittance is changed from 0% to 10%, and the visual gradation are changed. Each was performed for the presence or absence of unevenness. In addition, Comparative Example 1 is a liquid crystal panel produced by the same design and manufacturing process as Example 1 except that the structure 43 is not formed, and Comparative Example 2 is except that the polymerizable monomer and the photoinitiator are not mixed. Is a liquid crystal panel produced by the same design and manufacturing process as in Example 1.

  In Comparative Example 1, display unevenness is observed in the peripheral portion of the display area 16, and in Comparative Example 2, the response speed when the transmittance is changed from 0% to 10% is 120 ms, and the moving image display is performed. As a result, there was a problem with the responsiveness.

  On the other hand, in the first to third embodiments, display unevenness is not seen in the peripheral portion of the display area 16, and the response speed when the transmittance is changed from 0% to 10% is 40 ms, which is low. Good moving image display was also obtained in gradation. In addition, the contrast ratio was 500, which was a sufficient value.

It is a longitudinal cross-sectional view which shows the principal part of the liquid crystal display element of the 1st Embodiment of this invention. (a) is AA sectional drawing of FIG. 3, (b) is a cross-sectional view of a liquid crystal display element same as the above. It is a top view which shows the pixel periphery of a liquid crystal display element same as the above. It is a circuit diagram of a liquid crystal display element same as the above. It is a longitudinal cross-sectional view which shows the principal part of the liquid crystal display element of the 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the principal part of the liquid crystal display element of the 3rd Embodiment of this invention. It is a table | surface which shows each characteristic of Example 1 thru | or Example 3, and the comparative example 1 and the comparative example 2 of a liquid crystal display element same as the above.

Explanation of symbols

11 Liquid crystal panels as liquid crystal display elements
12 Array substrate
13 Counter substrate
14a Liquid crystal material
14 Liquid crystal layer
15 Spacer as a gap holding member
17 Sealing part as adhesive layer
41 pixels
43 structure
45 Polymerizable compound layer
Director of LC liquid crystal molecules

Claims (5)

An array substrate provided with a plurality of pixels in a matrix, and
A counter substrate disposed opposite to the array substrate;
A liquid crystal layer formed of a liquid crystal material containing liquid crystal molecules, and interposed between the array substrate and the counter substrate;
An adhesive layer for bonding the array substrate and the counter substrate;
A polymerizable compound layer that is formed on the outermost surface of the liquid crystal layer side of at least one of the array substrate and the counter substrate, and controls the tilt angle of the liquid crystal molecules of the liquid crystal material;
A liquid crystal display comprising: a structure formed so as to protrude from at least one of the array substrate and the counter substrate along at least a part of the position of the adhesive layer on the liquid crystal layer side. element. The liquid crystal display element according to claim 1, wherein the liquid crystal layer includes a liquid crystal material having negative dielectric anisotropy. A gap holding member for holding a gap between the array substrate and the counter substrate;
The liquid crystal display element according to claim 1, wherein the structure is made of the same material as the gap holding member. The liquid crystal display element according to any one of claims 1 to 3, wherein the structure is in contact with only one of the array substrate and the counter substrate. The liquid crystal display element according to any one of claims 1 to 4, wherein the structure is disposed on each of the array substrate and the counter substrate at positions shifted from each other.

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