JP2005172929A - Liquid crystal display device and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the occurrence of the discrimination of an electrode end. <P>SOLUTION: The liquid crystal display device for sandwiching a liquid crystal layer 30 between a pair of mutually opposite substrates 10 and 20 arranges an electrode formation regulation layer 11 between a substrate body 10A and an electrode 12, and forms an inclination face so that a height from the substrate body 10A to an electrode surface is gradually lowered toward an end 12a of a rubbing incident side (paper face left side) from the center part of the electrode 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a liquid crystal display device and an electronic apparatus.

In a matrix type liquid crystal display device, disclination may occur in the outer periphery of the pixel. Conventionally, in order to suppress the degradation of display quality due to such disclination, a method of shielding the outer periphery of the pixel has been employed (see, for example, Patent Documents 1 and 2).
Japanese Patent Laid-Open No. 5-203994 JP-A-5-249494

However, if the pixel outer periphery is shielded as described above, the aperture ratio is reduced accordingly, and a bright display cannot be obtained.
The present invention has been made in view of such circumstances, and an object thereof is to provide a liquid crystal display device capable of preventing the occurrence of disclination, and an electronic apparatus including the liquid crystal display device.

  In order to solve the above problems, a liquid crystal display device according to the present invention includes a liquid crystal layer sandwiched between a first substrate and a second substrate facing each other, and the liquid crystal display device includes the liquid crystal layer on the first substrate. A plurality of electrodes for applying a voltage to the layer are provided, and an inner surface side of the first substrate is subjected to an alignment process for aligning liquid crystals in a predetermined direction. In the cross section, each electrode is formed with an inclined surface at the first end opposite to the orientation direction of the electrode so that the height from the first substrate to the electrode surface gradually decreases. It is characterized by that.

  When the substrate is subjected to an alignment treatment such as rubbing, the major axis direction of the liquid crystal in the vicinity of the alignment film is aligned in one direction and a predetermined pretilt angle can be given to the liquid crystal. That is, by such an alignment treatment, the orientation of the liquid crystal is changed so that one end portion (second end portion of the liquid crystal molecule) in the major axis is more than the other end portion (first end portion of the liquid crystal molecule). It can be held diagonally in the raised state. In this specification, when the major axis of the liquid crystal is projected onto the substrate surface, the direction from the first end of the liquid crystal molecule toward the second end of the liquid crystal molecule is referred to as the alignment direction of the liquid crystal.

In the present invention, the orientation of the liquid crystal positioned at the end of the electrode, in particular, the angle formed between the electric field and the liquid crystal major axis is controlled by the shape of the electrode.
In the case where the electrode surface is formed flat as in the prior art, the tilting direction of the liquid crystal may be different from the center of the electrode at the electrode end due to the action of the oblique electric field generated at the electrode end. In other words, in the conventional configuration, the liquid crystal molecules L located at the center of the electrode and the liquid crystal molecules L located at the end of the electrode have substantially the same alignment state, but the direction of the electric field acting on the liquid crystal molecule L is the substrate at the center of the electrode. In contrast to the direction perpendicular to the surface, the electrode ends are oblique. For this reason, the angle formed by the electric field and the liquid crystal major axis may be an acute angle at the center of the electrode, for example, and an obtuse angle at the end of the electrode. When such a state occurs, the tilt direction (rotation direction) of the liquid crystal at the electrode center portion and the electrode end portion is reversed, and disclination occurs between them.
On the other hand, if the electrode surface is tapered to increase the inclination of the liquid crystal at the electrode end as in the present invention, the angle formed between the electric field and the liquid crystal major axis decreases, and the rotation direction is reversed. As a result, the rotation direction of the liquid crystal in the center portion of the electrode and the first end portion of the electrode becomes the same direction, and the occurrence of disclination at the dot peripheral portion is prevented.

In addition, as said orientation process, the well-known techniques as shown to the following (1)-(4) are employable.
(1) An organic alignment film such as polyimide is formed on the substrate and rubbed thereon (2) An oblique deposition film is formed on the substrate (3) A groove structure for liquid crystal alignment is formed on the substrate ( 4) An organic film is formed on the substrate and irradiated with polarized ultraviolet rays (photo-alignment treatment).

  In the configuration of the present invention described above, in the cross section along the alignment direction, the height from the first substrate to the electrode surface is further increased on each electrode and on the second end of the electrode on the alignment direction side. It is preferable to form an inclined surface that gradually increases.

In the conventional case where the electrode surface is formed flat, the liquid crystal molecules L located at the center of the electrode and the liquid crystal molecules L located at the end of the electrode have substantially the same alignment state. When magnifying and observing, the alignment state of the liquid crystal may be disturbed. For example, when an alignment film is formed on the surface of the substrate, the alignment film may be tapered (inclined surface) reflecting the step at the electrode end on the lower layer side. When such an inclined surface is formed, the tilt direction of the liquid crystal in the initial alignment state is reversed between the center portion of the electrode and the second end portion of the electrode. May be in the opposite direction (ie, disclination occurs).
On the other hand, when a tapered surface opposite to the above is formed at the second end portion of the electrode as in this configuration, the major axis of the liquid crystal at the electrode end portion is almost parallel to the substrate surface. Alternatively, the liquid crystal major axis is slightly tilted clockwise from a position parallel to the substrate. As a result, the rotation direction of the liquid crystal at the second end of the electrode is restricted to the same direction as that at the center of the electrode, and the occurrence of disclination on the second end side of the electrode is prevented.

By the way, as a method of forming the tapered surface at the end of the electrode as described above, the following method can be exemplified.
(1) A tapered electrode shape adjusting layer is provided between the first substrate and the electrode so that the thickness of the electrode changes along the alignment direction. It is formed by changing the thickness of the shape adjusting layer.
(2) A plurality of colored layers having different colors are provided between the first substrate and each of the electrodes, and the adjacent colored layers are arranged with their end portions partially overlapping. And each said electrode is arrange | positioned in the state in which the 2nd edge part was applied to the overlapping part of a colored layer on each colored layer when it planarly views, and the 2nd edge part of each electrode Are formed by the steps of the overlapping portions of the colored layers.
(3) A light shielding layer is provided in an area between dots constituting the display area. Then, each electrode is disposed in a state where the second end portion thereof is partially covered with the light shielding layer, and the inclined surface of the second end portion of the electrode is formed by a step corresponding to the thickness of the light shielding layer. .

  In the method (2), an electrode shape adjusting layer having an inclined surface reflecting the uneven shape caused by the overlapping of the colored layers is provided between the corresponding colored layer and the electrode, and each electrode shape adjusting layer is provided. Is arranged in a state where the second end portion on the orientation direction side is partially covered with the overlapping portion of the colored layer, and the inclined surface of the second end portion of each electrode is disposed on the overlapping portion of the colored layer. Alternatively, it may be formed by an inclined surface of the second end portion of the electrode shape adjusting layer. In this case, the film thickness of the electrode shape adjusting layer on the first end opposite to the orientation direction is from the center of the electrode shape adjusting layer toward the first end of the electrode shape adjusting layer. May be provided, and the inclined surface of the first end of each electrode may be formed by the inclined surface of the first end of the electrode shape adjusting layer.

  In the method (3), an electrode shape adjustment layer having an inclined surface reflecting the uneven shape of the light shielding layer is provided between the first substrate and the electrode, and each electrode shape adjustment layer is provided. The electrode shape adjustment in which the second end portion on the alignment direction side is partially covered with the light shielding layer, and the inclined surface of the second end portion of each electrode is disposed on the light shielding layer. You may form by the inclined surface of the 2nd edge part of a layer. In this case, at the first end of the electrode shape adjusting layer opposite to the orientation direction, the film thickness decreases from the center of the electrode shape adjusting layer toward the first end of the electrode shape adjusting layer. An inclined surface may be provided, and the inclined surface of the first end portion of the electrode may be formed by the inclined surface of the first end portion of the electrode shape adjusting layer.

Further, the liquid crystal display device of the present invention is a liquid crystal display device having a liquid crystal sandwiched between a pair of substrates and having an electrode for applying a voltage to the liquid crystal on one of the substrates, In the electrode region where the electrode is provided, the liquid crystal molecules of the liquid crystal are pretilted with the one end side lowered.
Also with this configuration, it is possible to prevent the occurrence of disclination at the periphery of the dot for the same reason as described above.

  The present invention is applicable to both a passive matrix liquid crystal display device that does not include a switching element and an active matrix liquid crystal display device that includes a switching element provided corresponding to each electrode. Is possible.

  In the present invention, the same taper shape can be given to the electrode (second electrode) of the other substrate (second substrate). That is, in the configuration of the present invention, the other substrate includes a second electrode for applying a voltage to the liquid crystal, and the second electrode is provided with a taper at one end, and the second electrode In the second electrode region provided with two electrodes, the liquid crystal molecules of the liquid crystal may further include a configuration in which the one end side is lowered and pretilted. As a result, a further disclination suppressing effect can be expected.

  In addition, an electronic apparatus according to the present invention includes the above-described liquid crystal display device. Thereby, an electronic device capable of high-quality display without disclination can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all of the following drawings, the film thicknesses and dimensional ratios of the respective components are appropriately changed in order to make the drawings easy to see. Further, in this specification, in each member constituting the liquid crystal display device, a surface on the liquid crystal layer side is referred to as an “inner surface”, and a surface opposite to the liquid crystal layer 40 is referred to as an “outer surface”.

[First Embodiment]
First, an example in which the present invention is applied to a passive matrix type transflective liquid crystal display device will be described with reference to FIGS. FIG. 1A is a schematic diagram showing a cross-sectional structure of the present liquid crystal display device, and FIG. 1B is a schematic diagram showing its planar structure.
The liquid crystal display device 1 of the present embodiment is a liquid crystal in which the initial alignment state is horizontally aligned between the first substrate 10 and the second substrate 20 facing each other, that is, a liquid crystal having positive dielectric anisotropy. The liquid crystal layer 30 made of a material is sandwiched.

  The substrate 10 has an electrode (first electrode) 12 made of a light-transmissive conductive material such as ITO and an alignment film 13 made of polyimide or the like on the inner surface side of a substrate body 10A made of a light-transmissive material such as quartz or glass. The substrate 20 is made of an electrode (second electrode) 21 made of a light-transmitting conductive material such as ITO and polyimide on the inner surface side of a light-transmitting substrate main body 20A such as quartz or glass. An alignment film 22 is provided in this order. As shown in FIG. 1B, the electrode 12 and the electrode 21 are formed in stripes in the Z direction (up and down direction on the paper surface) and the X direction (left and right direction on the paper surface), respectively, and are provided so as to cross each other. A dot region is formed by the intersection of the electrode 12 and the electrode 21. The alignment films 13 and 22 are subjected to an alignment process such as rubbing in order to align the liquid crystal in a predetermined direction. In this example, the rubbing direction of the alignment film 13 is a direction that forms + 30 ° with respect to the positive direction of the X axis (the direction from the left side to the right side of the paper) (slightly downward direction on the paper surface; indicated by a solid line arrow). The rubbing direction is a direction that forms −30 ° with respect to the positive direction of the X axis (upwardly diagonally to the right of the page; indicated by a dotted arrow). By such alignment treatment, the major axis direction of the liquid crystal in the vicinity of the alignment film is aligned in one direction, and at the same time, a predetermined pretilt angle is given to the liquid crystal. Specifically, with such an alignment treatment, the orientation of the liquid crystal is such that one end (second end) of the major axis is raised above the other end (first end). Is held at an angle. Here, when the liquid crystal major axis is projected onto the substrate surface, the direction from the first end to the second end is referred to as the alignment direction of the liquid crystal. The alignment direction is defined in the same direction as the rubbing direction of the alignment film.

  In the present embodiment, an electrode shape adjusting layer 11 is provided between the substrate body 10A and each electrode 12 to give a specific shape to the electrode 12 formed thereon due to its own film thickness change. ing. The electrode shape adjusting layer 11 is provided in a stripe shape corresponding to the formation region of each electrode 12, and each electrode shape adjusting layer 11 has a rubbing incident side from the center of the electrode shape adjusting layer 11. A tapered surface (inclined surface) is formed toward the left end portion (first end portion) 11a. The electrode shape adjusting layer 11 may be formed by, for example, patterning a resin film such as acrylic on the substrate 10A in a stripe shape and then squeezing the left end (first end) by heat treatment. it can. Further, in each electrode shape adjusting layer 11, the left end portion (first end portion) 11a is arranged on the inner side of the left end portion (first end portion) 12a of the electrode 12, and the rubbing of the electrode 12 is adjusted. The right end (second end) 11b that is the emission side is disposed slightly outside the right end (second end) 12b of the electrode 12. In other words, the electrode 12 is arranged such that the first end 12 a is applied to the inclined surface formed on the first end 11 a side of the electrode shape adjusting layer 11. Accordingly, the height from the substrate 10 </ b> A to the electrode surface is gradually reduced on the first end 12 a on the surface of the electrode 12, reflecting the uneven shape of the electrode shape adjusting layer 11 on the lower layer side ( An inclined surface (approaching the substrate surface) is formed.

Next, the operation of the liquid crystal display device 1 will be described with reference to FIG.
First, for comparison with this example, an example in which the electrode surface is formed flat will be described (FIG. 2A). In this configuration, the liquid crystal molecules L located at the center of the electrode and the liquid crystal molecules L located at the end of the electrode have substantially the same alignment state. That is, in the cross section along the alignment direction of the liquid crystal molecules L, the right end portion (second end portion of the liquid crystal) of the liquid crystal molecules L slightly floated compared to the left end portion (first end portion of the liquid crystal). It is in a state. In such a configuration, the angle α formed between the electric field and the liquid crystal major axis at the center of the electrode is an acute angle (that is, the liquid crystal major axis is tilted slightly clockwise from the position orthogonal to the electric field), so that the liquid crystal molecules L rotates clockwise by voltage application. On the other hand, since an electric field oblique to the electrode surface is generated at the first end of the electrode (the left end of the paper), the angle β formed by the electric field and the liquid crystal major axis is an obtuse angle (that is, the liquid crystal major axis is In a state of slightly tilting counterclockwise from a position orthogonal to the electric field). As a result, the liquid crystal molecules L rotate counterclockwise when a voltage is applied, and disclination occurs between the electrode center portion and the electrode end portion.
On the other hand, as in this example (FIG. 2B), when a tapered surface is formed at the first end of the electrode so that the height from the substrate to the electrode surface decreases from the right side to the left side. The liquid crystal molecules L positioned on the taper surface are in a state in which the major axis is more perpendicular to the substrate surface than that in FIG. 2A (that is, the angle β between the electric field and the major axis of the liquid crystal. Becomes an acute angle), and the liquid crystal molecules L at the first end of the electrode are easily rotated clockwise.

As described above, in this embodiment, the rotation direction of the liquid crystal at the center portion of the electrode and the first end portion of the electrode is the same direction, so that the occurrence of disclination at the peripheral portion of the dot is suppressed, and a bright display is possible. Become.
In the present embodiment, only the first end portion 11a of the electrode shape adjusting layer 11 is heat-treated to reduce the shape, but instead, the entire electrode shape adjusting layer 11 is heat-treated as shown in FIG. Both the first end portion 11a and the second end portion 11b may be loosened. In this case, the electrode 12 is provided from the flat portion at the center of the electrode shape adjusting layer 11 to the first end portion 11a. This structure is easier to manufacture than the structure in which only the first end portion 11a is selectively swollen as in the above embodiment.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. 4A is a schematic diagram showing a cross-sectional structure of one pixel composed of three dots of R (red), G (green), and B (blue), and FIG. 4B shows the planar structure. It is a schematic diagram. In the present embodiment, the same members or parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the present embodiment, a color filter 15 is provided on the first substrate 10 side in the configuration of the first embodiment. In other words, in the liquid crystal display device 2 of the present embodiment, the substrate 10 includes the color filter 15 having a plurality of colored layers of different colors on the inner surface side of the substrate body 10A made of a translucent material such as quartz or glass, and acrylic. An electrode shape adjusting layer 11 made of a resin film such as an electrode, an electrode 12 made of a translucent conductive material such as ITO, and an alignment film 13 made of polyimide or the like are sequentially provided. On the other hand, the substrate 20 includes, in order, an electrode 21 made of a light-transmitting conductive material such as ITO and an alignment film 22 made of polyimide or the like on the inner surface side of a light-transmitting substrate main body 20A such as quartz or glass. . The extending directions of the electrodes 12 and 21 and the voltage shape adjusting layer 11 formed in a stripe shape and the alignment treatment direction (rubbing direction) of the alignment films 13 and 22 are the same as those in the first embodiment.

  In the color filter 15, R, G, and B colored layers 15 R, 15 G, and 15 B are arranged in stripes corresponding to the dots that constitute the display area, and the electrode shape is adjusted on each colored layer. The layer 11 and the electrode 12 are formed in order. Adjacent colored layers are arranged with their end portions partially overlapping, and the light shielding layer 15S is formed by the overlapping portions of these colored layers.

  The electrode shape adjusting layer 11 is arranged in a state where a right end (second end) 11b which is an emission side of the rubbing is partially covered with the light shielding layer 15S. 11 is formed with an inclined surface reflecting the uneven shape caused by the overlapping of the colored layers. On the other hand, the left end portion (first end portion) 11a on the rubbing incident side of the electrode shape adjusting layer 11 has a thin layer thickness from the central portion toward the first end portion 11a. An inclined surface is formed. In each electrode shape adjusting layer 11, the left end (first end) 11 a that is the incident side of the rubbing is disposed inside the left end (first end) 12 a of the electrode 12. The right end (second end) 11b, which is the emission side of the rubbing, is disposed slightly outside the right end (second end) 12b of the electrode 12. In other words, the first end portion 12a and the second end portion 12b of the electrode 12 partially hang on the inclined surfaces formed on the first end portion side and the second end portion side of the electrode shape adjusting layer 11. Arranged in a shape. Accordingly, the height from the substrate 10 </ b> A to the electrode surface is gradually reduced on the first end 12 a on the surface of the electrode 12, reflecting the uneven shape of the electrode shape adjusting layer 11 on the lower layer side ( An inclined surface that is close to the substrate surface is formed, and an inclined surface that is gradually increased in height from the substrate 10A to the electrode surface (away from the substrate surface) is formed at the second end 12b. Yes.

Next, the operation of the present liquid crystal display device 2 will be described with reference to FIG.
First, for comparison with this example, an example in which the electrode surface is formed flat will be described (FIG. 5A). In this configuration, the liquid crystal molecules L located at the center of the electrode and the liquid crystal molecules L located at the end of the electrode have substantially the same alignment state. The alignment state may be disturbed. For example, when an alignment film is formed on the surface of the substrate, an inclined surface may be formed on the alignment film reflecting the step at the electrode end on the lower layer side. When such an inclined surface is formed, the liquid crystal molecules L in the central portion of the electrode are in a state where the right end portion (second end portion) is slightly lifted compared to the left end portion (first end portion). On the other hand, since the left end portion of the liquid crystal is lifted as compared with the right end portion at the second end portion of the electrode, in an extreme case, the electric field and the major axis of the liquid crystal are present at the second end portion of the electrode. May be an obtuse angle (that is, the liquid crystal major axis is tilted counterclockwise with respect to the electric field). In this case, since the liquid crystal molecules L located at the second end of the electrode rotate counterclockwise by voltage application, the rotation direction of the liquid crystal at the electrode end and the rotation direction of the liquid crystal at the center of the electrode are opposite to each other. Thus, disclination occurs between them.
On the other hand, as shown in this example (FIG. 5B), the height from the substrate to the electrode surface increases from the left side to the right side (away from the substrate surface) at the second end of the electrode. When a tapered surface is formed, the liquid crystal molecules L positioned on the tapered surface are in a state where the major axis is more parallel to the substrate surface than in the case of FIG. The liquid crystal at the end of the electrode is easily rotated clockwise because the state is slightly clockwise from the position parallel to the substrate (that is, the angle β formed by the electric field and the major axis of the liquid crystal is an acute angle).

Note that the alignment state of the liquid crystal at the first end of the electrode is the same as that in the first embodiment, and a description thereof will be omitted here.
As described above, in this embodiment, the rotation direction of the liquid crystal at the center portion of the electrode and the second end portion of the electrode is the same direction, so that not only the left side of the dot but also the right end portion of the dot has disclination. Occurrence can be prevented.

  In this example, the light shielding layer 15S is formed as an overlapping portion of two adjacent colored layers. However, as shown in FIG. The light shielding layer 15S may be formed by forming. In this case, the colored layer is partially overlapped on the light shielding layer 15S, and the light shielding region (that is, the region between the dots) is thickened so that the electrode shape adjusting layer 11 formed thereon is made thicker. Therefore, a larger uneven shape can be provided (that is, a larger inclined surface is formed at the second end portion of the electrode 12). Of course, the same effect can be obtained by simply forming the light shielding layer 15S in a thick film without overlapping the colored layer on the light shielding layer 15S.

[Electronics]
Next, specific examples of electronic devices including the liquid crystal display device of the above embodiment will be described.
FIG. 7 is a perspective view showing an example of a mobile phone. In FIG. 7, reference numeral 1000 denotes a mobile phone body, and reference numeral 1001 denotes a display unit using the liquid crystal display device.
Since the electronic device of this example includes the liquid crystal display device in the display portion, an electronic device capable of high-quality display without disclination can be provided.

In addition, this invention is not limited to the above-mentioned embodiment, It can implement in various deformation | transformation in the range which does not deviate from the meaning of this invention.
For example, in the above-described embodiment, the rubbing direction of the substrate (that is, the alignment direction of the liquid crystal) is defined as an oblique direction (in the above example, a direction that forms 30 °) with respect to the electrode. May be perpendicular to each other (that is, the rubbing direction of the upper substrate 10 is perpendicular to the direction of the child of the electrode 12 and the rubbing direction of the lower substrate 20 is perpendicular to the extending direction of the electrode 21). .

In the above embodiment, the alignment films 13 and 22 are made of an organic material such as polyimide and subjected to the rubbing process. However, as a method for performing the alignment process on the substrate, such an organic film is used. The same orientation state can be realized not only by rubbing but also by the following method.
(1) Method of forming inorganic alignment film on substrate by oblique deposition (2) Method of forming groove structure made of inorganic material on substrate using photolithography technology (3) Formation of photosensitive resin on substrate Then, a method of obtaining alignment in one direction by irradiating this photosensitive resin with polarized ultraviolet rays (photo-alignment treatment)
Even in these cases, the alignment direction of the liquid crystal is defined in the same manner as in the above embodiment. Note that when the alignment process is performed using a photolithography technique or a semiconductor film formation technique, there is no need to separately perform a subsequent process such as rubbing.

  Moreover, in the said embodiment, although the taper shape was provided only to the electrode 12 of one board | substrate 10, the same taper shape can be provided also to the electrode 21 of the other board | substrate 20 side. For example, in the first embodiment shown in FIG. 1, an electrode for giving a specific shape to the electrode 21 formed on the substrate main body 20 </ b> A and each electrode 21 due to its own film thickness change. A shape adjustment layer is provided, and each electrode shape adjustment layer is directed from the central portion of the electrode shape adjustment layer toward the left end (first end opposite to the orientation direction) on the rubbing incident side, You may form the taper surface (inclined surface) so that the layer thickness may become thin gradually. Further, as in the second embodiment, with respect to the electrode shape adjusting layer on the substrate 20 side, from the central portion of the electrode shape adjusting layer, the right end (the second in the alignment direction side) on the rubbing emission side. An inclined surface may be provided so that the height from the substrate surface gradually increases toward the end portion. By providing the electrode shape adjusting layer on both the upper and lower substrates 10 and 20 as described above, a further disclination suppressing effect can be expected.

  In the above-described embodiment, an example in which the present invention is applied to a passive matrix liquid crystal display device has been described. However, the present invention is not limited to this, and the present invention is not limited to this. It is also possible to apply to a display device. For example, when the present invention is applied to an active matrix type liquid crystal display device, as shown in FIG. 8, the left side edge (that is, the alignment direction) of each pixel electrode arranged in a matrix on the rubbing incidence side. A first inclined portion on the opposite side) and a tapered inclined surface on the adjacent edge. In FIG. 8, the portion where the taper is formed is indicated by hatching.

  Further, the shapes and combinations of the constituent members shown in the above-described examples are merely examples, and such shapes and the like can be variously changed based on design requirements and the like.

1 is a schematic diagram showing a cross-sectional structure and a planar structure of a liquid crystal display device according to a first embodiment of the present invention. The schematic diagram for demonstrating an effect | action of a liquid crystal display device. The figure which shows the other structural example of an electrode shape adjustment layer in a liquid crystal display device. The schematic diagram which shows the cross-section and planar structure of the liquid crystal display device which concern on 2nd Embodiment of this invention. The schematic diagram for demonstrating an effect | action of a liquid crystal display device. The cross-sectional schematic diagram which shows the other structural example of a liquid crystal display device equally. FIG. 14 is a perspective view illustrating an example of an electronic device of the invention. The typical top view which shows the structure of the electrode at the time of applying this invention to the structure of an active matrix type.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... 1st board | substrate, 11 ... Electrode shape adjustment layer (resin film), 11a ... 1st edge part of resin film, 11b ... 2nd edge part of resin film, 12. ..First electrode, 12a: first end of electrode, 12b: second end of electrode, 15: color filter, 15R, 15G, 15B ... colored layer, 15S ... Light shielding layer, 20 ... Second substrate, 21 ... Second electrode, 30 ... Liquid crystal layer, 1000 ... Electronic device, L ... Liquid crystal molecule

Claims (13)

A liquid crystal display device comprising an electrode for sandwiching a liquid crystal between a pair of substrates and applying a voltage to the liquid crystal on one of the substrates,
The electrode has a taper at one end,
The liquid crystal display device, wherein the liquid crystal molecules of the liquid crystal are pretilted with the one end side lowered in an electrode region provided with the electrode. The other substrate includes a second electrode for applying a voltage to the liquid crystal,
The second electrode has a taper at one end,
The liquid crystal display device according to claim 1, wherein the liquid crystal molecules of the liquid crystal are pretilted with the one end side lowered in a second electrode region provided with the second electrode.   The liquid crystal display device according to claim 1, further comprising a switching element provided corresponding to the electrode. A liquid crystal layer is sandwiched between a first substrate and a second substrate facing each other;
The first substrate is provided with a plurality of electrodes for applying a voltage to the liquid crystal layer, and an alignment treatment for aligning the liquid crystal in a predetermined direction is performed on the inner surface side of the first substrate. In the cross section along the alignment direction of the liquid crystal, each electrode has a gradually increasing height from the first substrate to the electrode surface at the first end of the electrode opposite to the alignment direction. A liquid crystal display device, characterized in that an inclined surface that is lowered is formed.   In the cross section along the alignment direction, each electrode has an inclined surface in which the height from the first substrate to the electrode surface is gradually increased at the second end of the electrode on the alignment direction side. The liquid crystal display device according to claim 4, wherein the liquid crystal display device is formed.   A tapered electrode shape adjusting layer is provided between the first substrate and the electrode so that the thickness of the electrode changes along the orientation direction. 6. The liquid crystal display device according to claim 4, wherein the liquid crystal display device is formed by changing the thickness of the shape adjusting layer.   A plurality of different colored layers are provided between the first substrate and the electrodes, and the adjacent colored layers are arranged with their end portions partially overlapping, and the electrodes are viewed in plan view. Sometimes the second end of each electrode is disposed on the corresponding colored layer in a state where it partially covers the overlapping portion of the colored layers, and the inclined surface of the second end of each electrode is formed between the colored layers. The liquid crystal display device according to claim 5, wherein the liquid crystal display device is formed by steps of overlapping portions.   Between the corresponding colored layer and the electrode, there is provided an electrode shape adjusting layer having an inclined surface reflecting the uneven shape due to the overlapping of the colored layers, and each electrode shape adjusting layer is a second on the alignment direction side. The electrode shape adjusting layer is arranged in a state where the end part is partially covered with the overlapping part of the colored layer, and the inclined surface of the second end part of each electrode is arranged in the overlapping part of the colored layers. The liquid crystal display device according to claim 7, wherein the liquid crystal display device is formed by an inclined surface of the second end portion.   At the first end of the electrode shape adjusting layer opposite to the orientation direction, the film thickness decreases from the center of the electrode shape adjusting layer toward the first end of the electrode shape adjusting layer. 9. An inclined surface as described above is provided, and the inclined surface at the first end of each electrode is formed by the inclined surface at the first end of the electrode shape adjusting layer. The liquid crystal display device described.   A light-shielding layer is provided in the area between each dot, and each electrode is arranged with its second end partly covered by the light-shielding layer. The inclined surface of the second end of the electrode is 6. The liquid crystal display device according to claim 4, wherein the liquid crystal display device is formed by a step corresponding to the thickness of the light shielding layer.   Between the first substrate and each electrode, an electrode shape adjusting layer having an inclined surface reflecting the uneven shape by the light shielding layer is provided, and each electrode shape adjusting layer is provided on the second in the alignment direction side. The end portion is arranged in a state where it partially covers the light shielding layer, and the inclined surface of the second end portion of each electrode is the second end of the electrode shape adjusting layer disposed on the light shielding layer. The liquid crystal display device according to claim 10, wherein the liquid crystal display device is formed by an inclined surface of a portion.   At the first end of the electrode shape adjusting layer opposite to the orientation direction, the film thickness decreases from the center of the electrode shape adjusting layer toward the first end of the electrode shape adjusting layer. 12. An inclined surface is provided, and the inclined surface of the first end portion of the electrode is formed by the inclined surface of the first end portion of the electrode shape adjusting layer. Liquid crystal display device. An electronic apparatus comprising the liquid crystal display device according to claim 1.

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