JP2007193258A - Color filter substrate, liquid crystal display device, electronic equipment, method of manufacturing color filter substrate and method of fabricating liquid crystal display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color filter substrate which has a uniform color characteristic and a viewing angle characteristic of a wide viewing field angle, to provide a liquid crystal display device comprising the color filter substrate, to provide electronic equipment which mounts the liquid crystal display device thereon, to provide a method of manufacturing the color filter substrate and a method of fabricating the liquid crystal display device. <P>SOLUTION: Since a distance T1 of the protrusion part 16 is smaller than a distance T2 of the protrusion part 15 (15a, 15b), a way of falling of liquid crystal molecules 101c which fall between the protrusion part 16 and a slit 23b can be controlled so as to be different from a way of falling of liquid crystal molecules 101a which fall between the protrusion part 15a and a slit 23a. Further, a way of falling of liquid crystal molecules 101b which fall between the protrusion part 16 and the slit 23a can be controlled so as to be different from a way of falling of liquid crystal molecules 101d which fall between the protrusion part 15b and the slit 23b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a color filter substrate provided with a protrusion for controlling the liquid crystal drive direction, a liquid crystal display device and an electronic device provided with the color filter substrate, a method for manufacturing the color filter substrate, and a method for manufacturing the liquid crystal display device.

As a color filter substrate having a protrusion for controlling the orientation, the protrusion (protrusion) having electrical characteristics of a relative dielectric constant of 11 or less and an electric conductivity of 3 × 10 ⁻¹² S / cm or more covers the colored layer. A color filter formed on a common transparent electrode is known (Patent Document 1). The colored layer provided with the protrusions can be formed by a pigment dispersion method using a photosensitive resin containing a desired colorant, and further by a printing method, an electrodeposition method, a transfer method, or the like.

  In addition, the protrusion can be formed by a photolithography method using a negative photosensitive resin or a positive photosensitive resin containing conductive powder in the resin component.

  The protrusions constituting the color filter of the MVA (Multi-domain Vertical Alignment) mode liquid crystal display equipped with such a color filter have an effect of giving a pretilt angle to nearby liquid crystal molecules, and the electric lines of force in a desired direction. By performing the distorting action, the driving direction of the liquid crystal molecules of the liquid crystal layer can be controlled in a plurality of directions in cooperation with the slits in the transparent pixel electrodes of the array substrate (element substrate).

JP-A-2003-35905, pages 4, 5

  Nowadays, MVA mode liquid crystal displays (liquid crystal display devices) are used for color TVs, and the screen size is becoming larger. Therefore, since the direction in which the color TV is viewed is wide, a color TV that can be viewed beautifully from any direction is required. When a driving voltage is applied to the liquid crystal display, the alignment control protrusion formed on the common transparent electrode covering the colored layer of the transparent substrate and the slit formed on the array substrate (element substrate) cooperate. The liquid crystal molecule drive direction of the liquid crystal layer is controlled in a plurality of directions, but since the alignment control protrusions are not formed around the colored layer, the liquid crystal molecule drive around the colored layer is driven. There is a problem that a portion whose direction cannot be controlled is generated, and uniform color characteristics cannot be obtained.

  The present invention has been made to solve the above-described problems, and has a color filter substrate, a liquid crystal display device and an electronic apparatus, and a method for manufacturing the color filter substrate having uniform color characteristics and wide viewing angle viewing characteristics. It is another object of the present invention to provide a method for manufacturing a liquid crystal display device.

  The present invention is a color filter substrate, wherein a first protrusion that partitions a plurality of colored layer regions on the color filter substrate, a plurality of types of colored layers formed in the plurality of colored layer regions, and a plurality of types of colored layers And a second protrusion that divides each of the first and second protrusions into a plurality of regions, and the first protrusion and the second protrusion are formed so as to protrude from the surfaces of the plurality of types of colored layers.

  According to this, since the first protrusion and the second protrusion are formed so as to protrude from the surface of the plurality of types of colored layers, the colored layer region includes a plurality of first protrusions and second protrusions. A liquid crystal display device having uniform color characteristics can be provided by being divided into regions and controlling the driving direction of liquid crystal molecules.

  In the color filter substrate of the present invention, the distance between the thickest portion of the second protrusion and the surface of the color filter substrate is larger than the distance between the thickest portion of the first protrusion and the surface of the color filter substrate. The gist is that the distance is smaller.

  According to this, the direction in which the liquid crystal molecules fall is different between the first protrusion, the second protrusion, and the opening. Since the distance between the thickest part of the second protrusion and the surface of the color filter substrate is smaller than the distance between the thickest part of the first protrusion and the surface of the color filter substrate, The manner in which the liquid crystal molecules fall between the one protrusion and the opening and the manner in which the liquid crystal molecules fall between the second protrusion and the opening can be controlled differently. Therefore, a liquid crystal display device having uniform color characteristics and a wide viewing angle can be provided.

  The gist of the color filter substrate of the present invention is that the second protrusion includes at least a second partition, and the second partition is formed on the colored layer.

  According to this, in the colored layer region that is divided into a plurality of portions by the second protrusion formed including the second partition portion formed on the colored layer and the driving of the liquid crystal is controlled, it has different viewing angle dependency. Therefore, a liquid crystal display device having uniform color characteristics and a wide viewing angle can be provided.

  The gist of the color filter substrate of the present invention is that the second protrusion includes at least a second partition, and the second partition is formed on the overcoat layer.

  According to this, in the colored layer region which is divided into a plurality of portions by the second protrusions formed including the second partition portion formed on the overcoat layer and the driving of the liquid crystal is controlled, the viewing angle dependency is different. Accordingly, a liquid crystal display device having uniform color characteristics and wide viewing angle viewing characteristics can be provided.

  The gist of the color filter substrate of the present invention is that the second protrusion includes at least a second partition, and the second partition is formed on the common electrode.

  According to this, in the colored layer region that is divided into a plurality of portions by the second protrusion formed including the second partition portion formed on the common electrode and the liquid crystal driving is controlled, the color layer region has different viewing angle dependencies. Therefore, a liquid crystal display device having uniform color characteristics and a wide viewing angle can be provided.

  The liquid crystal display device of the present invention has a first protrusion that partitions a plurality of colored layer regions on a color filter substrate, and each of a plurality of types of colored layers formed in the plurality of colored layer regions is divided into a plurality of regions. A color filter substrate that further includes a second protrusion to be divided, and the first protrusion and the second protrusion are formed so as to protrude from the surfaces of the plurality of types of colored layers, and a plurality of colors of the color filter substrate The gist of the invention is that it includes a counter substrate having a plurality of pixel electrodes corresponding to the layer region, and a liquid crystal sandwiched between the color filter substrate and the counter substrate.

  According to this configuration, the colored layer region divided into a plurality by the second protrusion and controlled in driving the liquid crystal has different viewing angle dependency. Therefore, the liquid crystal display device having a wide viewing angle has a viewing angle characteristic. Can be provided.

  The gist of the liquid crystal display device of the present invention is that a plurality of pixel electrodes are provided with openings, and the openings are composed of a plurality of sides parallel to the first protrusion and the second protrusion. .

  According to this, since the direction in which the liquid crystal molecules are tilted can be controlled by using the first protrusion, the second protrusion can be controlled in a direction different from the direction in which the second protrusion is inclined in a plane. The contrast in the inclined direction can be improved.

  The gist of the electronic apparatus of the present invention is that the liquid crystal display device of the present invention is mounted.

  According to this, since an MVA liquid crystal display device having high cost performance and high display quality is mounted, an electronic device having excellent display quality and cost competitiveness can be provided.

  The method for producing a color filter substrate of the present invention includes a step of forming a first partition portion so as to partition a plurality of colored layer regions on the color filter substrate, and a plurality of types of colored layers formed in the plurality of colored layer regions. And the plurality of types of colored layers each include at least a second partition wall portion that divides each of the plurality of colored layers into a plurality of regions, and the first protrusion including the first partition wall portion is formed of the plurality of types of colored layers. The second protrusion including the second partition wall is formed so as to protrude from the surface, and is formed so as to protrude from the surface of the plurality of types of colored layers. The gist is that the distance between the thickest part of the second protrusion and the surface of the color filter substrate is smaller than the distance from the surface of the filter substrate.

  According to this method, the distance between the thickest portion of the second protrusion and the surface of the color filter substrate is larger than the distance between the thickest portion of the first protrusion and the surface of the color filter substrate. Therefore, it is possible to control differently how the liquid crystal molecules fall between the first protrusion and the opening and how the liquid crystal molecules fall between the second protrusion and the opening. . For this reason, viewing angle characteristics with a wider viewing angle can be provided.

  The gist of the method for producing a color filter substrate of the present invention is that the second partition wall is formed on a plurality of types of colored layers.

  According to this method, in the colored layer region which is divided into a plurality of portions by the second protrusions formed by the second partition portions formed on the plurality of types of colored layers and the driving of the liquid crystal is controlled, the viewing angle dependency is different. Therefore, it is possible to provide a liquid crystal display device having uniform color characteristics and a wide viewing angle viewing angle characteristic.

  The gist of the color filter substrate manufacturing method of the present invention is that the second partition wall is formed on the overcoat layer.

  According to this method, the colored layer region which is divided into a plurality of portions by the second protrusions formed by the second partition formed on the overcoat layer and whose liquid crystal driving is controlled has different viewing angle dependencies. Therefore, a liquid crystal display device having uniform color characteristics and a wide viewing angle can be provided.

  The gist of the color filter substrate manufacturing method of the present invention is that the second partition wall is formed on the common electrode.

  According to this method, the colored layer region divided into a plurality by the second protrusion formed by the second partition formed on the common electrode and controlled in driving the liquid crystal has different viewing angle dependencies. Therefore, it is possible to provide a liquid crystal display device having uniform color characteristics and a wide viewing angle.

  The method for manufacturing a liquid crystal display device of the present invention includes a color filter substrate having a plurality of types of colored layers, a counter substrate having a plurality of pixel electrodes corresponding to the plurality of types of colored layers, and the color filter substrate and the counter substrate. A method for producing a liquid crystal display device, comprising: an aligned liquid crystal; and an alignment film for aligning liquid crystal molecules in a direction substantially perpendicular to the surface on the surface of the color filter substrate and the counter substrate in contact with the liquid crystal. The gist is that the substrate is manufactured using the method for manufacturing a color filter substrate of the present invention.

  According to this method, by forming the first protrusion and the second protrusion so as to have the function of the protrusion for controlling the liquid crystal driving direction, the manufacturing process can be simplified and the wide viewing angle can be obtained. An MVA liquid crystal display device having excellent viewing angle characteristics can be manufactured.

  In the embodiments of the present invention, a color filter substrate provided with an alignment film for vertical alignment and an MVA (Multi-domain Vertical Alignment) type liquid crystal display device using the color filter substrate will be described as an example. In addition, the figure used for description was enlarged or reduced as appropriate for the sake of clarity.

  Embodiments of the present invention will be described below with reference to the drawings.

<Color filter substrate>
FIG. 1 is a schematic plan view showing the structure of the color filter substrate. As shown in FIG. 1, the color filter substrate 10 of the present embodiment has a first partition 4 that partitions a plurality of colored layer regions 2 on the surface of a transparent glass substrate 1 as a substrate. In each colored layer region 2, colored layers 3 of three colors (R: red, G: green, B: blue) are formed. In each colored layer 3 (3R, 3G, 3B), the colored layers 3 of the same color are arranged linearly. That is, the color filter substrate 10 includes a stripe-type coloring layer 3.

  FIG. 2 is an enlarged plan view showing one colored layer region. FIG. 2 shows the liquid crystal alignment film 8 and the transparent electrode 7 shown in FIG. 3 in a transparent state for easy explanation. As shown in FIG. 2, the colored layer region 2 partitioned by the first partition wall 4 has a colored layer 3 (3R, 3G, 3B). It has the 2nd partition part 5 which divides | segments the planar area | region of this colored layer 3 (3R, 3G, 3B) into a some area | region. The second partition wall 5 is provided so as to divide the planar area of the colored layer 3 (3R, 3G, 3B) at an angle of approximately 45 degrees in the vertical direction of the paper. The width of the second partition wall 5 is approximately 10 μm although it depends on the size of the colored layer region 2. In FIG. 2, a part of the second partition wall portion 5 is hooked on the corner portion of the first partition wall portion 4, but the position may be appropriately set according to the aspect ratio of the colored layer region 2.

  In each colored layer region 2, colored layers 3 (3R, 3G, 3B) are formed by discharging and drying three (color) functional liquids containing different colored layer forming materials. As such a functional liquid, for example, a functional liquid made of an acrylic resin or a polyurethane resin colored using an inorganic or organic pigment as a coloring layer forming material can be given.

  FIG. 3 is a schematic cross-sectional view showing a colored layer region cut along line AA in FIG. As shown in FIG. 3, it has the 1st partition part 4 which divides the some colored layer area | region 2 on the surface of the glass substrate 1. As shown in FIG. The first partition 4 is formed on the surface of the glass substrate 1 by a known photolithography method. In the colored layer region 2 formed by being partitioned by the first partition wall portion 4, the above-described functional liquid containing the colored layer forming material is discharged by a droplet discharge device (not shown) to form the colored layer 3G. To do. Also in the other colored layer regions 2, the colored layers 3 (3R, 3G, 3B) are formed in the respective colored layer regions 2 in the arrangement shown in FIG.

  The 1st partition part 4 is formed so that 1-2 micrometers may protrude in the thickness direction with respect to the formed colored layer 3 (3R, 3G, 3B). That is, in the colored layer region 2, the first partition 4 is formed so as to protrude from the colored layer 3. In addition, the shape of the top part 400a of the 1st partition part 4 is not restricted to this, The ridge comprised by the inclined surface may be provided, and it may be a curved surface shape.

  An overcoat layer 6 is formed so as to cover the first partition walls 4 and the colored layers 3 (3R, 3G, 3B) formed on the surface of the glass substrate 1. The overcoat layer 6 has a function of protecting the colored layer 3 and the like from corrosion and contamination due to chemicals used during the manufacturing process, and is formed of a transparent resin such as an acrylic resin or an epoxy resin. In forming the overcoat layer 6, a spin coating method, a roll coating method, a dipping method, or the like can be employed. However, as in the case of the colored layer 3 (3R, 3G, 3B), a droplet discharge device is used. Can also be used.

  On the overcoat layer 6 formed on the surface of the colored layer 3 (3R, 3G, 3B), the second partition wall portion 5 shown in FIG. 2 provides a planar region of the colored layer 3 (3R, 3G, 3B). It is provided so as to be divided into a plurality of regions.

  The second partition wall 5 is formed on the surface of the overcoat layer 6 by a known photolithography method. The distance t1 from the surface of the glass substrate 1 to the top 500a of the second partition 5 is from the surface of the glass substrate 1 where the overcoat layer 6 is laminated on the top 400a of the first partition 4. It is formed to be smaller than the distance t2. In addition, the shape of the top 500a is not limited to this, and may be provided with a ridge constituted by an inclined surface.

  In order to cover the surface of the second partition wall portion 5 formed on the overcoat layer 6, and the first partition wall portion 4 and the colored layer 3 (3R, 3G, 3B) covered with the overcoat layer 6, the ITO film ( A transparent electrode 7 as a common electrode made of an indium-tin oxide film) and the liquid crystal alignment film 8 for vertically aligning the liquid crystal 101 (see FIG. 7) are laminated.

  That is, the first partition 4, the overcoat layer 6, the transparent electrode 7, and the liquid crystal alignment film 8 are formed to form a projection 15 as the first projection, and the second partition 5, the transparent electrode 7, and the liquid crystal. A protrusion 16 as the second protrusion is formed by the alignment film 8.

  In this embodiment, when the distance from the surface of the glass substrate 1 to the top of the protrusion 16 is a distance T1, and the distance from the surface of the glass substrate 1 to the top of the protrusion 15 is a distance T2, T1 > T2. That is, the distance T1 from the surface of the glass substrate 1 of the protrusion 16 formed including the second partition wall 5 as the second protrusion is defined as the first protrusion formed including the first partition 4. This distance is smaller than the distance T2 from the surface of the glass substrate 1 of the protrusion 15.

  In such a color filter substrate 10, the protrusions 15 and 16 also serve as protrusions for controlling the liquid crystal driving direction of the liquid crystal 101 (see FIG. 7), and an MVA liquid crystal display device 100 (see FIG. 7) described later. ).

Next, a method for manufacturing the color filter substrate of this embodiment will be described with reference to FIGS. FIG. 4 is a flowchart showing a method for manufacturing a color filter substrate, and FIGS. 5A to 5C and 6D to 6F are schematic sectional views showing a method for manufacturing a color filter substrate.
<Method for manufacturing color filter substrate>
The manufacturing method of the color filter substrate 10 of the present embodiment includes a step of forming the first partition 4 on the surface 1a of the glass substrate 1 (step S1), a step of forming the colored layer 3 (step S2), and an overcoat. A step of forming the layer 6 (step S3), a step of forming the second partition wall portion 5 (step S4), a step of forming a transparent electrode (step S5), and a step of forming a liquid crystal alignment film (step S6). It has.

  Step S1 in FIG. 4 is a first partition wall forming step. In step S1, as shown in FIG. 5A, the first partition 4 is formed on the surface 1a of the glass substrate 1 by a well-known photolithography method. Then, the process proceeds to step S2.

  Step S2 in FIG. 4 is a colored layer forming step. In step S2, as shown in FIG. 5B, a functional liquid 42 containing a colored layer forming material is applied to the colored layer region 2 partitioned by the first partition 4 formed on the surface 1a of the glass substrate 1. The colored layer 3 (3R, 3G, 3B) is formed by discharging from the droplet discharge head 40 as droplets and drying. Naturally, the droplet discharge head 40 is sequentially filled with three types of functional liquids 42 containing different colored layer materials corresponding to the respective colored layer regions 2 where the different colored layers 3R, 3G, 3B are formed, and discharged. To do. A plurality of droplet discharge heads 40 may be prepared, and the functional liquid 42 containing a different colored layer material may be filled and discharged.

  In this case, the number of discharges of the functional liquid 42 is adjusted and discharged for each of the plurality of divided colored layer regions 2 so that the thickness of the colored layer 3 after drying is thinner than the thickness of the first partition 4. The first partition wall 4 protrudes from the surface of the formed colored layer 3 by about 1 μm and functions as a first protrusion for controlling the liquid crystal driving direction. Then, the process proceeds to step S3.

  Step S3 in FIG. 4 is an overcoat layer forming step. In step S3, as shown in FIG.5 (c), the overcoat layer 6 is formed so that the 1st partition part 4 and the colored layer 3 (3R, 3G, 3B) formed by step S3 may be covered. It has a function of protecting the colored layer 3 and the like from corrosion and contamination caused by chemicals used during the manufacturing process, and is formed of a transparent resin such as an acrylic resin or an epoxy resin. In forming the overcoat layer 6, a spin coating method, a roll coating method, a dipping method, or the like can be employed. However, as in the case of the colored layer 3 (3R, 3G, 3B), a droplet discharge device is used. Can also be used. Then, the process proceeds to step S4.

  Step S4 in FIG. 4 is a second partition wall forming step. In step S4, as shown in FIG. 6D, the second partition wall 5 is formed by a well-known photolithography method.

  The distance t1 of the top 500a of the second partition wall 5 is formed to be smaller than the distance t2 of the first partition 4 including the overcoat layer 6 formed in step S3. The relationship between the distance t1 and the distance t2 has a great influence when functioning as a protrusion for controlling the liquid crystal driving direction of the liquid crystal 101 (see FIG. 7) described later. Then, the process proceeds to step S5.

  Step S5 in FIG. 4 is a transparent electrode forming step. In step S5, as shown in FIG. 6E, an ITO film (indium-tin oxide film) is formed on the overcoat layer 6 including the second partition wall portion 5 and the first partition wall portion 4 formed up to step S4. ) And the like are formed as a common electrode 7. Then, the process proceeds to step S6.

  Step S6 in FIG. 4 is a liquid crystal alignment film forming step. In step S6, as shown in FIG. 6F, a liquid crystal alignment film 8 for vertically aligning a liquid crystal 101 (see FIG. 7) described later is formed on the transparent electrode 7 formed in step S5. . When the liquid crystal 101 (see FIG. 7) having a negative dielectric anisotropy contacts the surface on which the liquid crystal alignment film 8 is applied, the liquid crystal 101 (see FIG. 7) is applied to the liquid crystal alignment film 8 when no voltage is applied. They are arranged in a substantially vertical direction.

  As a method of forming the liquid crystal alignment film 8, a solvent is added to an organic compound such as soluble polyimide, polyamic acid type polyimide, or modified polyimide as an alignment film material to adjust the viscosity, and printing methods such as offset, droplets, etc. A method of forming by a discharge method or the like can be given.

  A portion including the first partition wall portion 4, the transparent electrode 7, and the liquid crystal alignment film 8 is a projection portion 15 as a first protrusion portion, and a portion including the second partition wall portion 5, the transparent electrode 7, and the liquid crystal alignment film 8. Is a protrusion 16 as a second protrusion. The distance T1 from the thickest part of the protrusion 16 and the surface 1a of the glass substrate 1 is formed smaller than the distance T2 from the thickest part of the protrusion 15 and the surface 1a of the glass substrate 1. .

<Liquid crystal display device>
Next, the liquid crystal display device of this embodiment will be described with reference to FIGS. FIG. 7 is a schematic cross-sectional view showing the structure of the liquid crystal display device, and FIG. 8 is a schematic plan view showing pixels of the liquid crystal display device. Specifically, FIG. 7 is a schematic cross-sectional view taken along line BB in FIG. FIG. 8 is an enlarged view of a pixel viewed from the color filter substrate 10 side, and shows a state where the glass substrate 1 is seen through.

  As shown in FIG. 7, the liquid crystal display device 100 of the present embodiment is a counter substrate on which a color filter substrate 10 having three colored layers 3 and a plurality of pixel electrodes 22 corresponding to the colored layers 3 are formed. And a liquid crystal 101 having a negative dielectric constant sandwiched between the color filter substrate 10 and the element substrate 20. The color filter substrate 10 includes a first partition 4 that partitions the colored layer region 2 on which the colored layer 3 is formed, and a second region that divides the planar region of the colored layer 3 (3R, 3G, 3B) into a plurality of regions. And a partition wall 5. Further, an overcoat layer 6 is formed so as to cover the colored layer 3 (3R, 3G, 3B) and the first partition wall portion 4, and a second partition wall portion 5 is formed on the surface of the overcoat layer 6. Further, a transparent electrode 7 is formed as a common electrode made of transparent ITO (Indium Tin Oxide) including the overcoat layer 6 and the second partition wall 5.

  In the element substrate 20, a TFT (Thin Film Transistor) element 27 as a switching element that applies a driving potential to the pixel electrode 22 is provided between the pixel electrode 22, the source line 25, and the gate line 26. Liquid crystal alignment films 8 and 24 for aligning the liquid crystal molecules 101a and 101b of the liquid crystal 101 in a substantially vertical direction with respect to the surfaces of the color filter substrate 10 and the element substrate 20 in contact with the liquid crystal 101 are provided.

  Such a liquid crystal display device 100 visually recognizes information such as an image displayed from the color filter substrate 10 side, and polarizing plates (not shown) are provided on the surface of the color filter substrate 10 and the back surface of the element substrate 20. ) Is equipped. Further, illumination is performed by installing an illumination device (not shown) having a light source such as a cold cathode tube or an LED on the back side of the element substrate 20.

  As shown in FIGS. 7 and 8, the liquid crystal display device 100 has a plurality of sub-pixels SG (SG1, SG2, SG3) for display, and has three colors corresponding to the three colored layers 3R, 3G, 3B. One pixel G is constituted by the sub-pixels SG (SG1, SG2, SG3). The second partition wall 5 provided in each subpixel SG is formed so as to protrude from the surface of the colored layer 3 and has a function as a protrusion for controlling the liquid crystal driving direction. The pixel electrode 22 facing the coloring layer 3 is provided with slits 23 as a plurality of openings that open toward the color filter substrate 10 in parallel with the second partition wall 5.

  FIG. 7 shows a state of the liquid crystal display device 100 to which the drive voltage is applied. When no driving voltage is applied, the liquid crystal 101 is aligned substantially perpendicular to the liquid crystal alignment films 8 and 24. The alignment of the liquid crystal 101 in the vicinity of the protrusions 15 (15a, 15b), 16 is aligned substantially perpendicular to the liquid crystal alignment film 8 of the protrusions 15 (15a, 15b), 16, and the element substrate 20 as the counter substrate is aligned. A chain is formed with the liquid crystal 101 at the nearest portion of the formed liquid crystal alignment film 24 to be stable. A TFT element 27, a source line 25, and a gate line 26 are formed on the element substrate 20 facing the protrusion 15.

  When a driving voltage is applied between the transparent electrode 7 of the color filter substrate 10 and the pixel electrode 22 of the element substrate 20, as shown in FIG. 7, the protrusions 15 (15 a and 15 b) as the first protrusions Between the protrusion 16 as the second protrusion and the pixel electrode 22 and between the transparent electrode 7 other than the protrusions 15 (15a, 15b) and 16 and the slit 23 (23a, 23b), an oblique direction is provided. An electric field E is generated. The liquid crystal molecules 101a, 101b, 101c, and 101d of the liquid crystal 101 are tilted so as to be perpendicular to the direction of the electric field E. Therefore, when the driving voltage is applied, regions where the liquid crystal molecules 101a, 101b, 101c, and 101d are tilted are different from each other with the protrusions 15 (15a and 15b) and 16 and the slits 23 (23a and 23b) as boundaries. It is formed.

  Here, the distance T1 of the protrusion 15 (15a, 15b) and the distance T2 of the protrusion 16 will be described. As described above, when the drive voltage is applied, the liquid crystal molecules 101a, 101b, 101c, and 101d are tilted in different directions with the protrusions 15 (15a and 15b) and 16 and the slits 23 (23a and 23b) as boundaries. In this embodiment, since the distance T1 of the protrusion 16 is smaller than the distance T2 of the protrusion 15 (15a, 15b), the liquid crystal molecules 101c that fall between the protrusion 16 and the slit 23b are tilted. It is possible to control the way in which the liquid crystal molecules 101a fall between the protrusions 15a and the slits 23a to be different.

  Further, it is possible to control the manner in which the liquid crystal molecules 101b that fall between the protrusion 16 and the slit 23a fall and the manner in which the liquid crystal molecules 101d that fall between the protrusion 15b and the slit 23b fall.

  The planar relationship between the protrusion 15 (15a, 15b) and the slit 23 (23a, 23b) will be described. The subpixel SG1 shown in FIG. 8 will be described in detail. The other subpixels SG2 and SG3 are formed in the same manner. Four slits 23 are formed in the sub-pixel SG1. Each slit 23 is referred to as a slit 23 (23a to 23d). The first partition wall 4 of the subpixel SG1 is formed in a square shape. Each side of the first partition 4 of the sub-pixel SG1 is defined as first partition 4a to 4d. Moreover, the 2nd partition part 5 is formed in three places on the surface of colored layer 3R. The second partition walls 5 are referred to as second partition walls 5a, 5b, and 5c.

  As described with reference to FIG. 7, the protrusions 15 (15a, 15b) are formed based on the first partition walls 4a to 4d. Here, the protrusion 15 (15a, 15b) will be described using the first partition walls 4a to 4d. The slits 23a are formed so as to have substantially parallel sides in the first partition 4a, the first partition 4b, and the second partition 5a. Therefore, it has a triangular shape. Similarly, the slit 23c is formed to have sides 23aa, 23ab, and 23ac substantially parallel to the first partition wall portion 4d and the second partition wall portion 5b, respectively. Therefore, it has a triangular shape. Similarly, the slit 23d is also formed so as to have sides substantially parallel to the first partition walls 4b and 4c and the second partition wall 5c. Therefore, it has a triangular shape.

  The slit 23b includes a side 23ba substantially parallel to the first partition 4d, a side 23bd substantially parallel to the first partition 4d, sides 23bb and 23bc substantially parallel to the first partition 4b, and a second partition. A side 23be substantially parallel to 5a, a side 23bf substantially parallel to the second partition 5b, a side 23bg substantially parallel to the second partition 5c, and a side 23bh substantially parallel to the second partition 5b.

  By forming the slits 23a to 23d in this way, the electric field in an oblique direction depends on the relationship between the slits 23a to 23d, the first partition walls 4a to 4d as the first protrusions, and the second partition walls 5a, 5b and 5c as the second protrusions. E becomes even in a planar manner, and the direction in which the liquid crystal molecules 101a, 101b, 101c, and 101d fall within the sub-pixel SG1 is controlled to a different direction. Conventionally, the contrast from the same direction as the direction in which the second partition wall 5 (5a, 5b, 5c) is inclined has been reduced compared to the other directions. According to the present embodiment, by using the first partition 4 as the first protrusion, the second partition 5 (5a, 5b, 5c) moves in the direction in which the liquid crystal molecules 101a, 101b, 101c, 101d are tilted. Since it can be controlled in a direction different from the inclined direction, the contrast in the direction in which the second partition walls 5 (5a, 5b, 5c) are inclined can be improved. As a result, the tilting of the liquid crystal 101 with respect to the driving voltage in each colored layer region 2 and each colored layer 3 can be controlled in different directions, and thus a liquid crystal display device 100 having uniform color characteristics is provided. be able to.

  In addition, the colored layer region 2 that is divided into a plurality of portions by the protrusions 16 formed by the second partition walls 5 and whose liquid crystal driving is controlled has different viewing angle dependency, and thus has a wide viewing angle characteristic. A liquid crystal display device 100 having the same can be provided.

<Method for manufacturing liquid crystal display device>
In the manufacturing method of the liquid crystal display device 100 of the present embodiment, the colored layer 3 is formed in the colored layer region 2 defined by the first partition walls 4 formed on the surface of the glass substrate 1, and the overcoat layer 6 is formed thereon. And a second partition wall portion 5 as a second protrusion for controlling the liquid crystal driving direction is provided on the overcoat layer 6. A transparent electrode 7 as a common electrode and a liquid crystal alignment film 8 are provided thereon, and the distance T1 of the protrusion 16 including the second partition wall 5 is greater than the distance T2 of the protrusion 15 including the first partition 4. Further, the color filter substrate 10 formed to be small is used for manufacturing. Thus, the liquid crystal display device 100 having a wide viewing angle and viewing angle characteristics can be manufactured.

  It should be noted that the pixel electrode 22 and the TFT element 27 and a method for forming the wiring for electrically connecting them to the transparent substrate 21 and the color filter substrate 10 and the element substrate 20 are bonded at a predetermined position using an adhesive or the like. A known method may be used for filling the liquid crystal 101 in the gap.

<Electronic equipment>
Next, a large liquid crystal TV as an electronic apparatus of this embodiment will be described. FIG. 9 is a schematic perspective view showing a large liquid crystal TV. As shown in FIG. 9, a large-sized liquid crystal TV 200 as an electronic device has the display unit 201 mounted with the liquid crystal display device 100 having the wide viewing angle characteristics of the above embodiment. Since the liquid crystal display device 100 can be manufactured more efficiently and with less defects such as color unevenness and high yield, it is possible to realize a large liquid crystal TV 200 having excellent display quality and high cost performance. .

The effects of the above embodiment are as follows.
(1) According to the liquid crystal display device of the above-described embodiment, the direction of the liquid crystal molecules 101a, 101b, 101c, and 101d to be tilted by using the first partition 4 as the first protrusion is set to the second partition 5 ( 5a, 5b, 5c) can be controlled in a direction different from the direction in which the second partition wall 5 (5a, 5b, 5c) is inclined. As a result, the tilting of the liquid crystal 101 with respect to the driving voltage in each colored layer region 2 and each colored layer 3 can be controlled in different directions, and thus a liquid crystal display device 100 having uniform color characteristics is provided. be able to.

  (2) According to the liquid crystal display device of the above-described embodiment, the colored layer region 2 that is divided into a plurality of portions by the protrusions 16 formed by the second partition walls 5 and whose liquid crystal driving is controlled has different viewing angle dependencies. Therefore, the liquid crystal display device 100 having a wide viewing angle and viewing angle characteristics can be provided.

  (3) According to the method of manufacturing the liquid crystal display device of the above embodiment, the liquid crystal display device 100 having a wide viewing angle and viewing angle characteristics can be manufactured.

  (4) According to the electronic apparatus of the above embodiment, the large-sized liquid crystal TV 200 as the electronic apparatus has the wide viewing angle and small color unevenness because the liquid crystal display device 100 of the above embodiment is mounted on the display unit 201. It is possible to provide a large-sized liquid crystal TV 200 having high display performance and high display quality.

Hereinafter, other embodiments embodying the present invention will be described with reference to the drawings.
A method for manufacturing the color filter substrate of this embodiment will be described with reference to FIGS. FIG. 10 is a flowchart showing a method for manufacturing a color filter substrate according to this embodiment, and FIGS. 11A to 11C are schematic cross-sectional views showing a method for manufacturing a color filter substrate according to this embodiment.
<Method for manufacturing color filter substrate>
As shown in FIG. 10, the flowchart showing the method for manufacturing the color filter substrate of the present embodiment includes the first partition wall forming step (step S21), the colored layer forming step (step S22), and the overcoat layer forming step (step S23). ), A transparent electrode forming step (step S24), a second partition wall forming step (step S25), and a liquid crystal alignment film forming step (step S26).

  The first partition wall forming step (step S21), the colored layer forming step (step S22), and the overcoat layer forming step (step S23) are the first partition wall forming step (step S1) and the colored layer forming step (step S23) in FIG. Since it is the same as step S2) and an overcoat layer formation process (step S3), description is abbreviate | omitted.

  In this embodiment, after the overcoat layer forming step (step S23), the transparent electrode forming step (step S24) is performed. In step S24, as shown in FIG. 11A, the transparent electrode 7 as a common electrode made of an ITO film (indium-tin oxide film) or the like is formed on the overcoat layer 6 formed up to step S23. To do. Then, the process proceeds to step S25.

  Step S25 is a second partition wall forming step. As shown in FIG. 11B, the second partition wall 5 is formed on the transparent electrode 7. The second partition wall 5 is formed by a well-known photolithography process. A portion having the maximum thickness of the second partition wall portion 5 (in this embodiment, since the upper surface of the second partition wall portion 5 is flat, the entire upper surface of the second partition wall portion 5 corresponds to this portion) and the surface 1a of the glass substrate 1. The distance t1 between the overcoat layer 6, the transparent electrode 7 and the first partition wall portion 4 formed in steps S23 and S24 on the first partition wall portion 4 is the thickest portion (in this embodiment, transparent). Since the upper surface of the electrode 7 is flat, the entire upper surface of the transparent electrode 7 corresponds to this portion.) The thickness of the second partition wall portion 5 is adjusted to be smaller than the distance t2 between the surface 1a of the glass substrate 1 and the glass substrate 1. To do. Next, the process proceeds to step S26.

  Step S26 is a liquid crystal alignment film forming step. In step S26, as shown in FIG. 11C, a liquid crystal 101 (see FIG. 7) described later is vertically aligned on the transparent electrode 7 and the second partition wall 5 formed in steps S24 and S25. Therefore, a liquid crystal alignment film 8 is formed. When the liquid crystal 101 (see FIG. 7) having a negative dielectric anisotropy contacts the surface on which the liquid crystal alignment film 8 is applied, the liquid crystal 101 (see FIG. 7) is applied to the liquid crystal alignment film 8 when no voltage is applied. They are arranged in a substantially vertical direction.

  As a method of forming the liquid crystal alignment film 8, a solvent is added to an organic compound such as soluble polyimide, polyamic acid type polyimide, or modified polyimide as an alignment film material to adjust the viscosity, and printing methods such as offset, droplets, etc. A method of forming by a discharge method or the like can be given.

  Further, a portion including the first partition 4, the overcoat layer 6, the transparent electrode 7, and the liquid crystal alignment film 8 is a protrusion 15 as a first protrusion, and the second partition 5 and the liquid crystal alignment film 8 are included. Let the part be a protrusion 16 as a second protrusion. The distance T1 from the thickest part of the protrusion 16 and the surface 1a of the glass substrate 1 is formed smaller than the distance T2 from the thickest part of the protrusion 15 and the surface 1a of the glass substrate 1. .

The effects of the above embodiment are as follows.
(5) By using this color filter substrate for the liquid crystal display device, the liquid crystal display device is divided into a plurality of parts by the protrusions 15a and 15b as the first protrusions and the protrusion 16 as the second protrusions, and the driving of the liquid crystal is controlled. Since the colored layer region 2 has different viewing angle dependencies, the liquid crystal display device 100 having a viewing angle characteristic with a wide viewing angle can be provided.

  (6) Further, by using the liquid crystal display device 100 for the electronic device described above, it is possible to realize each electronic device having excellent display quality and high cost performance.

Hereinafter, other embodiments embodying the present invention will be described with reference to the drawings.
<Method for manufacturing color filter substrate>
A method for manufacturing the color filter substrate of this embodiment will be described with reference to FIG. A different point from Example 1 and Example 2 mentioned above is demonstrated. FIG. 12 is a schematic cross-sectional view showing the method for manufacturing the color filter substrate of this example. The process of the present embodiment includes the first partition wall forming process (step S1 or step S21) → the colored layer forming process (step S2 or step S22) → the second partition wall forming process (step S4 or step S25) → the overcoat layer. The order of formation process (step S3 or step S23) → transparent electrode formation process (step S5 or step S24) → liquid crystal alignment film formation process (step S6 or step S26).

  In the second partition wall forming step, the second partition wall 5 is formed directly on the colored layer 3 (3R, 3G, 3B) by a well-known photolithography process. The distance t1 from the portion having the greatest thickness of the second partition wall portion 5 and the surface 1a of the glass substrate 1 is larger than the distance t2 from the portion having the greatest thickness of the first partition wall portion 4 to the surface 1a of the glass substrate 1. It is formed to be smaller.

  Thereafter, the overcoat layer forming step (step S3 or step S23) → the transparent electrode forming step (step S5 or step S24) → the liquid crystal alignment film forming step (step S6 or step S26) is performed, and the overcoat layer 6 and the transparent layer are transparent. The electrode 7 and the liquid crystal alignment film 8 are formed uniformly. Therefore, the first partition 4, the overcoat layer 6, the transparent electrode 7, and the liquid crystal alignment film 8 constitute a protrusion 15 as a first protrusion. Further, the second partition wall portion 5, the overcoat layer 6, the transparent electrode 7, and the liquid crystal alignment film 8 constitute a protrusion portion 16 as a second protrusion portion. The distance T1 from the thickest part of the protrusion 16 and the surface 1a of the glass substrate 1 is smaller than the distance T2 from the thickest part of the protrusion 15 and the surface 1a of the glass substrate 1. The

The effects of the above embodiment are as follows.
(7) By using this color filter substrate for the liquid crystal display device, the liquid crystal display device is divided into a plurality of parts by the protrusions 15a and 15b as the first protrusions and the protrusion 16 as the second protrusions, and the driving of the liquid crystal is controlled. Since the colored layer region 2 has different viewing angle dependencies, the liquid crystal display device 100 having a viewing angle characteristic with a wide viewing angle can be provided.

  (8) Further, by using the liquid crystal display device 100 for the electronic device described above, it is possible to realize each electronic device having excellent display quality and high cost performance.

Modifications other than the above-described embodiment are as follows.
(Modification 1) In the color filter substrate 10 of the above embodiment, the configuration of the colored layer 3 is not limited to this. For example, the arrangement order of the three colored layers 3R, 3G, 3B arranged in stripes may be different. FIG. 13A and FIG. 13B are plan views showing the arrangement of the colored layers of the modification. As shown in FIG. 6A, a mosaic method in which colored layers 3 of the same color are arranged in an oblique direction, or a delta method in which different colored layers 3 are arranged at each vertex of a triangle as shown in FIG. The present invention can be applied. Furthermore, the colored layer 3 is not limited to three colors, and may have a four-color configuration in which other colors that enhance color reproducibility are added.

  (Modification 2) In the liquid crystal display device 100 and the manufacturing method thereof in the above embodiment, the arrangement of the transparent electrodes 7 of the color filter substrate 10 is not limited to this. For example, the transparent electrode 7 may be formed by masking so as to avoid the top 500 a of the second partition wall 5. According to this, even if the gap between the color filter substrate 10 filled with the liquid crystal 101 and the element substrate 20 becomes very narrow, the top portion 500a of the protruding second partition wall portion 5 does not have the transparent electrode 7, The trouble that the transparent electrode 7 and the pixel electrode 22 are electrically short-circuited can be reduced.

  (Modification 3) The electronic device on which the liquid crystal display device 100 of the above embodiment is mounted is not limited to the large liquid crystal TV 200. For example, portable information devices called PDA (Personal Digital Assistants) and portable terminal devices, personal computers, word processors, digital still cameras, in-vehicle monitors, monitor direct-view digital video recorders, car navigation devices, electronic notebooks, workstations, It can be suitably used as an image display means for a video phone, a POS terminal or the like.

The schematic plan view which shows the structure of a color filter board | substrate. The enlarged plan view which shows one colored layer area | region. The schematic sectional drawing which shows the colored layer area | region cut by the AA line of FIG. The flowchart figure which shows the manufacturing method of a color filter board | substrate. (A)-(c) is a schematic sectional drawing which shows the manufacturing method of a color filter substrate. (D)-(f) is a schematic sectional drawing which shows the manufacturing method of a color filter substrate. FIG. 2 is a schematic cross-sectional view illustrating a structure of a liquid crystal display device. FIG. 2 is a schematic plan view showing a pixel of a liquid crystal display device. The schematic perspective view which shows large sized liquid crystal TV. The flowchart figure which shows the manufacturing method of a color filter board | substrate. (A)-(c) is a schematic sectional drawing which shows the manufacturing method of a color filter substrate. The schematic sectional drawing which shows the manufacturing method of a color filter board | substrate. (A) And (b) is a top view which shows arrangement | positioning of the colored layer of a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Glass substrate, 1a ... Surface, 2 ... Colored layer area | region, 3, 3B, 3G, 3R ... Colored layer, 4, 4a, 4b, 4c, 4d ... 1st partition part as a 1st projection part, 5, 5a 5b, 5c: second partition as second protrusion, 6: overcoat layer, 7: transparent electrode as common electrode, 8, 24: liquid crystal alignment film, 10: color filter substrate, 15, 15a, 15b ... projection as first projection, 16 ... projection as second projection, 20 ... element substrate as counter substrate, 21 ... transparent substrate, 22 ... pixel electrode, 23 ... slit as opening, 23a, 23b, 23c, 23d ... slit, 23aa-23ac, 23ba-23bh ... side, 25 ... source line, 26 ... gate line, 27 ... TFT element as switching element, 40 ... droplet discharge head, 42 ... functional liquid, 100 …liquid crystal 101, liquid crystal, 101a, 101b, 101c, 101d ... liquid crystal molecules, 200 ... large liquid crystal TV as an electronic device, 201 ... display unit, 400a, 500a ... top of the head, E ... electric field, G ... pixel, SG, SG1, SG2, SG3 ... sub-pixels, t1, t2, T1, T2 ... distance.

Claims (13)

A color filter substrate,
A first protrusion that divides a plurality of colored layer regions on the color filter substrate;
A plurality of types of colored layers formed in the plurality of colored layer regions;
A second protrusion that divides each of the plurality of types of colored layers into a plurality of regions;
The color filter substrate, wherein the first protrusion and the second protrusion are formed so as to protrude from the surface of the plurality of types of colored layers.   2. The color filter substrate according to claim 1, wherein the portion where the second protrusion is thickest than the distance between the portion where the first protrusion is thickest and the surface of the color filter substrate. A color filter substrate having a smaller distance between the surface of the color filter substrate and the surface of the color filter substrate.   3. The color filter substrate according to claim 1, wherein the second protrusion includes at least a second partition, and the second partition is formed on the colored layer. Color filter substrate.   3. The color filter substrate according to claim 1, wherein the second protrusion includes at least a second partition, and the second partition is formed on an overcoat layer. Color filter substrate.   3. The color filter substrate according to claim 1, wherein the second protrusion includes at least a second partition wall, and the second partition wall is formed on a common electrode. Color filter substrate. A first protrusion that divides a plurality of colored layer regions on the color filter substrate, and a second protrusion that divides each of the plurality of types of colored layers formed in the plurality of colored layer regions into a plurality of regions. And a color filter substrate formed such that the first protrusion and the second protrusion protrude beyond the surface of the plurality of types of colored layers;
A counter substrate having a plurality of pixel electrodes corresponding to the plurality of colored layer regions of the color filter substrate;
A liquid crystal display device comprising: a liquid crystal sandwiched between the color filter substrate and the counter substrate.   7. The liquid crystal display device according to claim 6, wherein openings are provided in the plurality of pixel electrodes, and the openings are formed by a plurality of sides parallel to the first protrusion and the second protrusion. A liquid crystal display device characterized by being configured.   An electronic apparatus comprising the liquid crystal display device according to claim 6. Forming a first partition so as to partition a plurality of colored layer regions on the color filter substrate;
Forming a plurality of types of colored layers formed in the plurality of colored layer regions,
The plurality of types of colored layers each include at least a second partition portion that divides each of the plurality of colored layers into a plurality of regions, and a first protrusion including the first partition portion is formed so as to protrude from the surface of the plurality of types of colored layers. The second protrusion including the second partition wall is formed so as to protrude from the surface of the plurality of types of colored layers, and the portion having the largest thickness of the first protrusion and the surface of the color filter substrate A method of manufacturing a color filter substrate, wherein a distance between a portion having the maximum thickness of the second protrusion and a surface of the color filter substrate is smaller than a distance between the first and second protrusions.   10. The method for manufacturing a color filter substrate according to claim 9, wherein the second partition wall portion is formed on the plurality of types of colored layers.   10. The method for manufacturing a color filter substrate according to claim 9, wherein the second partition wall portion is formed on an overcoat layer.   The method for manufacturing a color filter substrate according to claim 9, wherein the second partition wall portion is formed on a common electrode. A color filter substrate having a plurality of types of colored layers, a counter substrate having a plurality of pixel electrodes corresponding to the plurality of types of colored layers, a liquid crystal sandwiched between the color filter substrate and the counter substrate, and the color filter A method for manufacturing a liquid crystal display device, comprising: a substrate and a surface of the counter substrate that contacts the liquid crystal; and an alignment film that aligns molecules of the liquid crystal in a substantially vertical direction with respect to the surface,
A method for manufacturing a liquid crystal display device, wherein the color filter substrate is manufactured using the method for manufacturing a color filter substrate according to any one of claims 9 to 12.

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