JP2007171562A - Liquid crystal display device, electronic apparatus, and method of forming magnetic film pattern - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device wherein operability of liquid crystal is good during the application of an intermediate voltage, and also to provide an electronic apparatus and a method of forming a magnetic film pattern. <P>SOLUTION: A magnetic film 25 is disposed around a pixel electrode 14. As regards magnetic poles of the magnetic film 25, S poles are disposed above and under the pixel electrode 14, and N poles are disposed on the left and the right of the pixel electrode 14. Lines of magnetic force emitted from left and right N poles of the magnetic film 25 advance to upper and lower S poles of the magnetic film 25 while describing circular arcs. When a voltage is not applied, liquid crystal molecules are inclined as prescribed toward advancing direction of the lines of magnetic force. When a voltage is applied, a liquid crystal is more inclined in the direction inclined when the voltage is not applied to perform switching from a display state from black display to white display. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device, an electronic apparatus, and a magnetic film pattern forming method, and more particularly to a VA liquid crystal display device.

In recent years, for example, flat panel displays such as a liquid crystal display (LCD) and a plasma display have become widespread as display devices that display television signals as images. Among them, the LCD has a disadvantage that the viewing angle is narrow, but a VA (Vertical Aligned) method, an IPS (In-Plane Switching) method, and the like have been developed, and a wide viewing angle is realized.
In the VA method, a wide viewing angle is achieved by forming a plurality of regions (referred to as multi-domains) having different liquid crystal alignment directions in one pixel. Patent Document 1 discloses a method for aligning liquid crystals for forming a multi-domain. According to this, in a liquid crystal display device in which liquid crystal is sealed between a TFT array substrate on which a TFT (Thin Film Transistor) is disposed and a counter substrate facing the TFT array substrate, the surface of the TFT array substrate or the counter substrate Discloses a method of forming a protrusion and a method of bending an equipotential line by slitting an electrode. Currently, from the viewpoint of the certainty of response and response speed when the display of a liquid crystal display device is reversed in black and white, either the method of arranging protrusions on both the TFT array substrate and the counter substrate, or the TFT array substrate and the counter substrate A method in which a projecting body is disposed on one of the substrates and a slit is formed in an electrode on the other substrate is widely adopted.

JP-A-11-242225 (pages 14 to 17, FIGS. 9 to 12)

  However, in a VA-type negative liquid crystal display device, when a protrusion is placed on a substrate and a voltage is applied between the electrodes to switch from black display to white display, the area above the protrusion does not apply voltage. Sometimes liquid crystal molecules (hereinafter referred to as liquid crystal) do not tilt, and even when a voltage is applied, they are not tilted by being pushed by the adjacent liquid crystal. Therefore, the upper region of the protrusions is particularly difficult to display because the liquid crystal is less likely to switch from the light shielding state (black display state) to the transmitted light state (white display state) compared to a flat region other than the protrusions. When an intermediate voltage is applied in the middle of switching from white to white display, the liquid crystal is not tilted in the region above the protrusions, and a phenomenon remains in which black display remains. As a result, when the intermediate voltage is applied, the operability of the liquid crystal that operates in accordance with the applied voltage is degraded.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to provide a liquid crystal display device, an electronic device, and a magnetic film pattern with good liquid crystal operability when an intermediate voltage is applied in the middle of switching from black display to white display. It is to provide a forming method.

  In order to solve the above-described problems, the liquid crystal display device of the present invention has an electrode formed on an opposing surface between a pair of substrates, and sandwiched between the substrates a liquid crystal layer composed of liquid crystals exhibiting vertical alignment when no voltage is applied. A liquid crystal display device comprising a pixel constituting a display unit and a magnetic film disposed around the pixel, and the liquid crystal is tilted by lines of magnetic force emitted from the magnetic film when no voltage is applied to the electrode It is characterized by doing.

  According to this liquid crystal display device, the magnetic film is disposed around the pixel, and the liquid crystal of the liquid crystal layer is tilted by the influence of the magnetic lines of force when no voltage is applied. Therefore, the liquid crystal is further tilted in the direction tilted when no voltage is applied when a voltage is applied. Further, the inclined liquid crystal tilts the adjacent liquid crystal by pressing the adjacent liquid crystal. The conventional liquid crystal display device has a configuration using a projecting body, but the liquid crystal display device of the present invention is not configured to use a projecting body, so that all the liquid crystal in the pixel is formed flat in the pixel. It inclines according to the applied voltage. Therefore, even when the intermediate voltage is applied, the liquid crystal according to the applied voltage can improve the operability.

  In the liquid crystal display device of the present invention, a plurality of pixels are provided, and the magnetic film is disposed between adjacent pixels around the pixels and emits magnetic force to the liquid crystal region corresponding to both adjacent pixels. Features.

  According to this liquid crystal display device, since the magnetic film is disposed so as to emit magnetic lines of force in the liquid crystal regions corresponding to both adjacent pixels, the magnetic film is formed in comparison with the case where another magnetic film is disposed for each pixel. The area to be arranged can be reduced. Accordingly, it is possible to increase the density of the pixels and reduce the size of the liquid crystal display device.

  In the liquid crystal display device of the present invention, the magnetic film magnetic poles around the pixel are arranged such that a pair of N-pole regions are substantially opposite to each other, a pair of S-pole regions are substantially opposite to each other, and the pair of N-pole regions are The straight line through which the straight line passes and the straight line through which the pair of S pole regions pass are arranged substantially orthogonally.

  According to this liquid crystal display device, a pair of N poles are substantially opposed to each other around the pixel, a pair of S poles are substantially opposed to each other, a straight line passing through a pair of N pole regions, and a pair of S poles A straight line passing through the region is arranged substantially orthogonally. Magnetic lines of force from one N pole to two adjacent S poles travel in an arc. Similarly, lines of magnetic force from another N pole to two adjacent S poles travel in a circular arc. The vector of magnetic field lines traveling from the N pole to the S pole will indicate multiple directions at each point. Accordingly, since the liquid crystal affected by the magnetic field lines is inclined in many directions, a liquid crystal display device having a wide viewing angle can be obtained.

  In the liquid crystal display device of the present invention, the cross-sectional area in the magnetic pole region of the magnetic film is narrower than the cross-sectional area in the region other than the magnetic pole region.

  According to this liquid crystal display device, the cross-sectional area in the magnetic pole region of the magnetic film is narrower than the cross-sectional area in the region other than the magnetic pole region. Since the cross-sectional area of the magnetic pole region is narrow, the magnetic force lines in the magnetic pole region are emitted from the magnetic film except for the magnetic poles. Thereby, it is possible to prevent the magnetic field lines from being concentrated too much on the magnetic pole region. Since the liquid crystal is tilted according to the strength of the magnetic lines of force, the liquid crystal near the magnetic pole region is excessively tilted due to the influence of the strong magnetic lines of force, and it is possible to prevent the generation of a white display region when no voltage is applied.

  In the liquid crystal display device of the present invention, one of the pair of substrates is a substrate including a pixel electrode, a synchronization wiring, a data wiring, and a switching element, and at least a part of the magnetic film includes a synchronization wiring. And it is arranged in a region facing the data wiring.

  According to this liquid crystal display device, the element substrate includes a pixel electrode, a synchronization wiring, a data wiring, and a switching element, and at least a part of the magnetic film includes a region facing the synchronization wiring and a data wiring. It is arranged in a region opposite to. The synchronization wiring and the data wiring are arranged in a region that does not overlap with the pixel region because they do not have optical transparency. Since the magnetic film is not light-transmissive, at least a part of the magnetic film, which is arranged in the area between the pixels, is arranged in the area facing the synchronization wiring and the data wiring, so that It is possible to efficiently use a region that does not need to have the light transmittance. Therefore, the aperture ratio of the liquid crystal display device can be maintained even when a magnetic film having no light transmittance is provided.

In the liquid crystal display device of the present invention, the magnetic film is interposed between the pair of substrates, and the gap between the pair of substrates is regulated to a certain size.
According to this liquid crystal display device, since the magnetic film is interposed between the pair of substrates and the gap between the pair of substrates is restricted to a certain size, the thickness of the liquid crystal layer sandwiched between the pair of substrates is constant. The size can be regulated. Thereby, it is not necessary to separately arrange a member for regulating the thickness of the liquid crystal layer. Therefore, it is not necessary to arrange a member for regulating the thickness of the liquid crystal layer separately from the magnetic film, and the productivity of the liquid crystal display device can be improved.

An electronic apparatus according to the present invention includes any one of the liquid crystal display devices described above.
According to this electronic apparatus, it can be set as the electronic apparatus provided with the liquid crystal display device which has one of the effects mentioned above.

  The magnetic film pattern forming method of the present invention is a magnetic film pattern forming method for forming a magnetic film pattern on a substrate, and a bank forming step for forming a bank film having a groove corresponding to the shape of the magnetic film pattern on the substrate; A powder material placement step of filling the groove with a magnetic powder material, a binder placement step of placing a liquid binder that solidifies the powder material on the powder material filled in the groove, and a powder material and a binder. A film forming step of solidifying the film to form a film pattern; and a magnetization step of magnetizing the film pattern to form a magnetic film pattern.

  According to this magnetic film pattern forming method, a bank film in which a groove having the shape of the magnetic film pattern is formed is formed, and this groove is filled with a powdery material before magnetization, which is a material for forming the magnetic film pattern. A liquid binder for solidifying the powdery material is disposed on the powdery material filled in the groove and solidified to form a film pattern. After the bank is removed, the film pattern is magnetized to form a magnetic film pattern. As a result, the magnetic film pattern can be formed with a material that forms fewer magnetic film patterns compared to a method in which a resist containing a material before magnetization for forming the magnetic film pattern is applied and the film pattern is formed by photolithography. Can do. Therefore, in the magnetic film pattern formation, resource saving of the magnetic film pattern material can be realized.

  In the magnetic film pattern forming method of the present invention, the binder disposing step is characterized by discharging and disposing liquid material droplets containing the binder.

  According to this magnetic film pattern forming method, in the binder placement step, liquid material droplets containing a binder are ejected and placed on the pre-magnetized powdery material that forms the magnetic film pattern filled in the grooves. Therefore, it is possible to arrange with a small amount of liquid material compared to a method in which a liquid material containing a binder is applied to the entire substrate and the liquid material that does not fit in the groove is removed. Therefore, in the magnetic film pattern formation, resource saving of the liquid material containing the binder can be realized.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In addition, in order to make each layer and each member in each figure have a size that can be recognized on each drawing, the scale is different for each layer and each member.
(First embodiment)
A liquid crystal display device according to a first embodiment of the present invention manufactured using the present invention will be described with reference to FIGS.
FIG. 1 is a schematic plan view of the liquid crystal display device, and FIG. 2 is a schematic cross-sectional view taken along the line HH ′ of the liquid crystal display device of FIG.

  1 and 2, in the liquid crystal display device 1 of the present embodiment, a TFT array substrate 2 as a pair of substrates and a counter substrate 3 are bonded together by a sealing material 4 which is a photocurable sealing material. A liquid crystal layer composed of the liquid crystal 5 enclosed in the region partitioned by the sealing material 4 is sandwiched. The sealing material 4 is formed in a frame shape closed in a region within the substrate surface.

  A peripheral parting 6 for concealing the wiring with a light shielding material is formed on the surface of the counter substrate 3 on the liquid crystal 5 side inside the formation region of the sealing material 4. A data line driving circuit 7 and a mounting terminal 8 are formed along the side 2a (lower side in the figure) of the TFT array substrate 2 in a region outside the sealing material 4, and a side 2b adjacent to the side 2a. The scanning line driving circuit 9 is formed along the side 2c (left and right sides in the figure). On the remaining side 2d (upper side in the figure) of the TFT array substrate 2, a wiring 10 for connecting the two scanning line driving circuits 9 is provided. In addition, inter-substrate conductive members 11 for providing electrical continuity between the TFT array substrate 2 and the counter substrate 3 are disposed at the four corners of the counter substrate 3.

  Further, the liquid crystal display device 1 is configured for color display, and in the counter substrate 3, red (R), green (G), and blue (B ) Color filters 12R, 12G, and 12B are formed together with a protective film. Further, a counter electrode 13 is disposed on the TFT array substrate 2 side of the protective film of the color filters 12R, 12G, and 12B.

  The liquid crystal has the property that the tilt angle of the liquid crystal molecules changes when a voltage is applied to the electrodes sandwiching the liquid crystal, and the tilt angle of the liquid crystal is controlled by controlling the voltage applied to the liquid crystal by the switching operation of the TFT. Then, an operation of transmitting or blocking light is performed for each pixel. Thereby, the transmitted light passes through a color filter having three color filters of red (R), green (G), and blue (B) that are installed relative to each pixel. The color of each corresponding color filter is transmitted as colored light. In addition, since light does not naturally enter the color filter corresponding to the pixel where the light is blocked by the liquid crystal, the color filter is black. In this way, by operating the liquid crystal as a shutter by the switching operation of the TFT, the transmission of light is controlled for each pixel, and the color image can be displayed by blinking the pixel.

  In the region for displaying an image of the liquid crystal display device 1 having such a structure, a plurality of pixels are configured in a matrix of m rows and n columns, and a pixel signal is switched to each of these pixels. A TFT (switching element) is formed. A data line (source wiring) for supplying a pixel signal is electrically connected to the source electrode of the TFT, a scanning line (gate wiring) for supplying a scanning signal is electrically connected to the gate electrode of the TFT, and a drain electrode of the TFT The pixel electrode 14 is electrically connected to.

  A scanning signal of a pulse signal is supplied from the scanning line to the gate electrode of the TFT to which the scanning line is connected at a predetermined timing.

  The pixel electrode 14 is electrically connected to the drain of the TFT, and the pixel signal supplied from the data line is applied to the pixel electrode 14 of each pixel by turning on the TFT as a switching element for a certain period. It is supplied at the timing. The voltage level of the pixel signal of a predetermined level supplied to the pixel electrode 14 in this way is held between the counter electrode 13 of the counter substrate 3 shown in FIG. 2, and the liquid crystal 5 is changed according to the voltage level of the pixel signal. The amount of transmitted light changes. The liquid crystal display device 1 includes a color filter, and the liquid crystal display device 1 is controlled by an image signal applied to an electrode sandwiching a liquid crystal layer made of the liquid crystal 5 by transmitting light transmitted through the color filters 12R, 12G, and 12B. A color image can be displayed.

  FIG. 3 is a schematic cross-sectional view of a main part of the liquid crystal display device. As shown in FIG. 3, the TFT array substrate 2 includes a first substrate 15. A retardation film 16 is disposed on the surface of the first substrate 15 opposite to the liquid crystal 5, and a polarizing film 17 is disposed on the surface of the retardation film 16. A gate electrode 18 and an insulating film 19 are disposed on the surface of the first substrate 15 on the liquid crystal 5 side. An insulating film 20 is disposed on the surface of the gate electrode 18 and the insulating film 19 on the liquid crystal 5 side. A TFT 21 is disposed in a region facing the gate electrode 18 on the surface of the insulating film 20 on the liquid crystal 5 side. A source electrode 22 and a drain electrode 23 are disposed on both sides of the TFT 21 on the insulating film 20, and a current flows from the source electrode 22 to the drain electrode 23 when a voltage is applied to the gate electrode 18. . An insulating film 24 is disposed around the TFT 21, the source electrode 22, and the drain electrode 23 and on the surface on the liquid crystal 5 side, and the surface on the liquid crystal 5 side of the insulating film 24 is formed flat. A magnetic film 25 and a pixel electrode 14 are disposed on the surface of the insulating film 24 on the liquid crystal 5 side, and the pixel electrode 14 is electrically connected to the drain electrode 23 through a contact hole 26. A vertical alignment film (not shown) is formed on the surface of the pixel electrode 14 on the liquid crystal 5 side, and the spindle-shaped liquid crystal 5 is aligned so as to be substantially perpendicular to the pixel electrode 14, which is a so-called VA method.

  The counter substrate 3 includes a second substrate 27. A retardation film 28 is disposed on the surface of the second substrate 27 opposite to the liquid crystal 5, and a polarizing film 29 is disposed on the surface of the retardation film 28. Color filters 12R, 12G, and 12B and a black mask 30 are disposed on the surface of the second substrate 27 on the liquid crystal 5 side, and light beams that have passed through the liquid crystal 5 pass through the color filters 12R, 12G, and 12B, and the black mask. 30 is configured to block the light beam. A counter electrode 13 is disposed on the surface of the color filter 12R, 12G, 12B and the black mask 30 on the liquid crystal 5 side, and a vertical alignment film (not shown) is formed on the surface of the counter electrode 13 on the liquid crystal 5 side. It is oriented so as to be substantially perpendicular to the electrode 13. When a voltage is applied between the pixel electrode 14 and the counter electrode 13, the inclination of the liquid crystal 5 changes corresponding to the applied voltage, and the amount of light transmitted through the polarizing film 17, the liquid crystal 5, and the polarizing film 29 changes. It is supposed to be.

  FIG. 4 is a schematic plan view of a main part of the liquid crystal display device. As shown in FIG. 4, the center of the cross-shaped magnetic film 25 is disposed in the vicinity of the four corners of the pixel electrode 14, and the magnetic film 25 is disposed so as to surround each pixel electrode 14. A magnetic pole of the magnetic film 25 is disposed in a tip region of the magnetic film 25 having a substantially cross shape that is opposed to a substantially central portion of each of the four sides of the substantially square pixel electrode 14. Further, in each magnetic film 25, the opposed tip regions have the same magnetic pole. For example, in the present embodiment, the N pole is disposed in the tip region of the magnetic film 25 that is opposed to the substantially central portion of the left and right sides of the pixel electrode 14, and the tip region of the magnetic film 25 that is opposed to the substantially central portion of the upper and lower sides. The S pole is arranged. The magnetic film 25 is arranged in a region facing the gate wiring 32 as a synchronization wiring and the source wiring 33 as a data wiring.

Next, the action of the magnetic film 25 on the liquid crystal 5 will be described with reference to FIGS. FIG. 5 is a diagram for explaining the liquid crystal operation of the liquid crystal display device.
As shown in FIG. 3, the magnetic film 25 and the pixel electrode 14 are disposed on the insulating film 24. The liquid crystal 5 has a property of tilting under the influence of a magnetic field, and the liquid crystal 5 on the pixel electrode 14 side that is strongly influenced by the magnetic field is tilted with respect to the liquid crystal 5 on the counter electrode 13 side. For example, the liquid crystal 5 on the pixel electrode 14 in the vicinity of the N pole 34 is fixed to the alignment film formed on the surface of the pixel electrode 14 on the pixel electrode 14 side, and the counter electrode 13 side is affected by the magnetic field toward the magnetic force line 35. Tilt. The liquid crystal 5a on the pixel electrode 14 and the liquid crystal 5b adjacent to the counter electrode 13 are also inclined in the direction of the magnetic force line 35 on the counter electrode 13 side with respect to the pixel electrode 14 side.

  As shown in FIG. 4, the magnetic lines of force 35 from the N pole 34 to the S pole 36 draw arcuate curves centering on approximately four corners of the pixel electrode 14. On the right side of the pixel electrode 14, the magnetic field lines 35 travel from the N pole 34 toward the left, and travel toward an upper S pole 36 and a lower S pole 36 in a circular arc. Similarly, on the left side of the pixel electrode 14, the magnetic field lines 35 progress from the N pole 34 to the right, and progress toward an upper S pole 36 and a lower S pole 36 in a circular arc. The arrows in the figure schematically show the magnetic force lines 35 and the direction of the magnetic force lines 35.

  As shown in FIG. 5, the liquid crystal 5 is affected by the magnetic force lines 35 and tilts in the traveling direction of the magnetic force lines 35. Accordingly, the liquid crystal 5 at the center of the right side of the pixel electrode 14 is tilted to the left, which is the traveling direction of the magnetic lines 35, and the liquid crystal 5 at the center of the left side is tilted to the right, which is the traveling direction of the magnetic lines 35. The liquid crystal 5 at the center of the upper side of the pixel electrode 14 is tilted upward, which is the traveling direction of the magnetic force lines 35, and the liquid crystal 5 at the center of the lower side is tilted downward, which is the traveling direction of the magnetic force lines 35.

  The upper right region of the pixel electrode 14 is inclined in the traveling direction of the magnetic lines 35 from the right side center to the upper side center, and the lower right region is inclined in the traveling direction of the magnetic lines 35 from the right side center to the lower side center. Similarly, the upper left region of the pixel electrode 14 is inclined in the traveling direction of the magnetic lines 35 from the left side center to the upper side center, and the lower left region is inclined in the traveling direction of the magnetic lines 35 from the left side center to the lower side center. In the central part of the pixel electrode 14, it is away from the magnetic pole, the magnetic field lines 35 are weak, and the liquid crystal 5 is not easily tilted.

  When no voltage is applied between the pixel electrode 14 and the counter electrode 13, the liquid crystal 5 is tilted at a minute angle under the influence of a magnetic field. When a voltage is applied between the pixel electrode 14 and the counter electrode 13, the liquid crystal 5 further tilts in the same direction that is tilted when no voltage is applied between the pixel electrode 14 and the counter electrode 13. The liquid crystal 5 in the center is inclined in either direction because it is pushed by the peripheral liquid crystal 5. Since the magnetic film 25 is disposed so that the magnetic force lines 35 travel in an arc shape, the liquid crystal 5 is inclined in a plurality of directions in an arc shape. There is a correlation between the tilt direction of the liquid crystal 5 and the viewing angle dependency, and since the liquid crystal 5 tilts in a plurality of directions, the viewing angle is wide.

Next, a method for manufacturing the magnetic film 25 of the TFT array substrate 2 will be described with reference to FIG. FIG. 6 is a flowchart of the magnetic film manufacturing method.
The TFT 21 of the TFT array substrate 2, its wiring, and the counter substrate 3 can be manufactured by a known method, and the description thereof is omitted. The process of forming the magnetic film 25 will be described as being formed by a known method up to the insulating film 24 of the TFT array substrate 2.

  In the flowchart of FIG. 6, step S <b> 1 corresponds to a bank forming process, which is a process of forming a bank film 37 on the surface of the insulating film 24. Next, the process proceeds to step S2. Step S2 corresponds to a powder layer forming step, and is a step of forming a layer of magnet powder. Next, the process proceeds to step S3. Step S3 corresponds to a binder placement step, and is a step of placing a binder solution on the magnet powder. Next, the process proceeds to step S4. Step S4 corresponds to a forming process, and is a process of forming an unmagnetized magnetic film 25 from magnet powder and a binder. Next, the process proceeds to step S5. Step S5 corresponds to a bank removal process and is a process of removing a bank. Next, the process proceeds to step S6. Step S <b> 6 corresponds to a magnetization step, and is a step of magnetizing the magnetic film 25 by applying a magnetic field to the magnetic film 25. The above is the step for forming the magnetic film 25, and the subsequent steps are after the magnetic film 25 is formed. Next, the process proceeds to step S7. Step S7 corresponds to an electrode forming process and is a process for forming the pixel electrode 14.

Next, a method for manufacturing the magnetic film 25 will be described using FIGS. 7 to 9 in association with the steps shown in FIG. 7 and 8 are diagrams for explaining a method of manufacturing a magnetic film. FIG. 9 is a schematic perspective view of the magnetizing head.
In addition, the same code | symbol is attached | subjected about the same member as the member published in FIG.

FIG. 7A corresponds to step S1. As shown in FIG. 7A, a bank material is applied to the surface of the insulating film 24 and dried. The bank material is made of a photosensitive resin, and a recess 38 is formed as a groove corresponding to the shape of the magnetic film pattern by photolithography.
FIG. 7B is a diagram corresponding to step S2. As shown in FIG. 7B, the magnetic material powder 39 is disposed on the surface of the bank film 37 and the recess 38, and the surface of the bank film 37 is rubbed and moved by the blade 40 to be disposed in the recess 38. The upper surface of the magnetic material powder 39 and the surface of the bank film 37 are substantially flush with each other, and the magnetic material powder 39 on the surface of the bank film 37 is removed.

  The magnetic material may be any material that can be magnetized by applying a magnetic field to form a magnet, and various known magnetic materials can be used as a constituent material of the magnet. Preferably, a compound of an iron group transition metal and a rare earth metal is preferable. Specifically, an Nd-Fe-B (neodymium-iron-boron) compound, an Sm-Co (samarium-cobalt) compound, or an Sm-Fe-N ( Samarium-iron-nitrogen) compounds and the like are preferable.

  The magnetic material may have magnetic anisotropy or magnetic isotropy. In this specification, the magnetic material having magnetic anisotropy has the property of being magnetized only in the direction of the easy axis of magnetization, and can make a stronger magnet by aligning the direction (orientation) by a magnetic field during molding. A magnetic material that can be produced, for example, Sm-Co (samarium-cobalt) compound. The magnetic material having magnetic isotropy is a magnetic material having the property of being magnetized equally from any direction, for example, an Nd-Fe-B (neodymium-iron-boron) compound. In this embodiment, Nd—Fe—B having magnetic isotropy is adopted as the magnetic material.

  FIG. 7C is a diagram corresponding to step S3. As shown in FIG. 7C, droplets 41 containing a binder material are applied to the magnetic material powder 39 disposed in the recesses 38 of the bank film 37 by a droplet discharge method. Although there are various ejection techniques for the droplet ejection method, the inkjet method is used in the present embodiment. According to the inkjet method, a fine wiring pattern can be formed. The droplet discharge head 42 and the first substrate 15 are relatively moved, and the droplet 41 is discharged from the nozzle of the droplet discharge head 42. The discharged droplets 41 land on the magnetic material powder 39 in the recess 38 and penetrate into the magnetic material powder 39.

  The binder material can be combined with a powdered magnetic material to form a solid having a hardness that can withstand use as a magnet, and is discharged as droplets from the nozzle of the droplet discharge head 42. There is no particular limitation as long as it can be prepared in a liquid form. For example, a thermosetting resin such as an epoxy resin, a thermoplastic resin such as a nylon resin, an elastomer such as a synthetic rubber, a heat resistant resin such as a polyimide resin, an ultraviolet curable resin, or the like can be used.

  The binder material is used by mixing with a solvent as necessary. The solvent is not particularly limited, and a solvent having good compatibility with the binder material to be used can be selected and used from existing solvents. Specific examples of solvents include alcohols such as ethanol, n-propyl alcohol, i-propyl alcohol, n-butanol, and cellosolve, ketones such as acetone, methyl ethyl ketone, and cyclohexanone, cyclohexane, hexane, heptane, octane, and mineral spirits. -Hydrocarbon compounds such as benzene, toluene, xylene and the like. In this embodiment, an ultraviolet curable polyimide resin is used as the binder material, and ethanol is used as the solvent.

  After the droplet 41 of the binder material is disposed in step S3, the magnetic film 25 is solidified by irradiation with ultraviolet rays in step S4.

  FIG. 8A is a diagram corresponding to step S5. As shown in FIG. 8A, the bank film 37 is removed by etching. After the bank film 37 is removed, the magnetic film 25 is left on the surface of the insulating film 24.

FIG. 8B is a diagram corresponding to step S6. As shown in FIG. 8B, the magnetic film 25 is magnetized by bringing the magnetizing head 43 that generates a magnetic field close to the magnetic film 25. The magnetizing head 43 and the first substrate 15 are relatively moved to sequentially magnetize the plurality of magnetic films 25.
As shown in FIG. 9, the magnetizing head 43 includes a first terminal 44, a second terminal 45, a third terminal 46, and a fourth terminal 47. A first coil 48 is disposed between the first terminal 44 and the second terminal 45, and a magnetic core is connected to the first terminal 44 and the second terminal 45 at the center of the first coil 48. Connected and arranged. A second coil 49 is disposed between the third terminal 46 and the fourth terminal 47, and a magnetic core is connected to the third terminal 46 and the fourth terminal 47 at the center of the second coil 49. Connected and arranged.

  The material constituting the first terminal 44, the second terminal 45, the third terminal 46, the fourth terminal 47, the magnetic core of the first coil 48 and the magnetic core of the second coil 49 is a magnetic material having a high magnetic permeability. For example, a metal-based soft magnetic material, an oxide-based magnetic material, a sintered soft magnetic material, or the like can be used. In this embodiment, Mn—Sn single crystal ferrite, which is an oxide-based magnetic material, is employed.

  When the magnetizing head 43 is energized to the first coil 48, the first terminal 44 is magnetized to the N pole and the second terminal 45 is magnetized to the S pole. Similarly, when the second coil 49 is energized, the third terminal 46 is magnetized to the north pole and the terminal of the fourth terminal 47 is magnetized to the south pole.

  When the first terminal 44 to the fourth terminal 47 of the magnetizing head 43 are brought into contact with the magnetic film 25 and the first coil 48 is energized, the first coil 48, the first terminal 44, the magnetic film 25, A magnetic circuit is formed between the two terminals 45, one end of the magnetic film 25 in contact with the first terminal 44 is magnetized to the S pole, and one end of the magnetic film 25 in contact with the second terminal 45 is N Magnetized on the pole. Similarly, when the magnetizing head 43 and the magnetic film 25 are brought into contact with each other and the second coil 49 is energized, the second coil 49, the third terminal 46, the magnetic film 25, and the fourth terminal 47 are magnetized. A circuit is formed, and one end of the magnetic film 25 in contact with the third terminal 46 is magnetized to the S pole, and one end of the magnetic film 25 in contact with the fourth terminal 47 is magnetized to the S pole. The first terminal 44 and the third terminal 46 that are magnetized in the N pole are arranged at positions facing each other, and the second terminal 45 and the fourth terminal 47 that are magnetized in the S pole are arranged at positions facing each other. Is done. Therefore, as shown in FIG. 4, the two opposite ends of the magnetic film 25 are magnetized to the N pole, and the other two opposite ends are magnetized to the S pole. The magnetic film pattern is formed through the steps so far. In the present embodiment, the first coil 48 and the second coil 49 are energized simultaneously. However, after the first coil 48 is energized, the energization of the first coil 48 is stopped and the second coil 48 is energized. The coil 49 may be energized.

  FIG. 8C is a diagram corresponding to step S7. As shown in FIG. 8C, the pixel electrode 14 is formed on the surface of the insulating film 24 and the alignment film is formed on the surface of the pixel electrode 14 to complete the TFT array substrate 2. Further, after the sealing material 4 is disposed on the TFT array substrate 2 and the liquid crystal 5 is applied, the sealing material 4 is cured by combining the TFT array substrate 2 and the counter substrate 3, thereby providing a liquid crystal display device as shown in FIG. 1 is completed.

As described above, this embodiment has the following effects.
(1) According to the present embodiment, the magnetic film 25 is disposed on the TFT array substrate 2, and the magnetic lines of force 35 emitted from the magnetic film 25 are inclined at a minute angle when no voltage is applied. In addition, when a voltage is applied, the liquid crystal can have a predetermined tilt angle corresponding to the applied voltage with high responsiveness. Further, the surface of the pixel electrode 14 is formed flat, and is inclined by being pushed by the adjacent liquid crystal when a voltage is applied. Therefore, even when the intermediate voltage is applied, the liquid crystal according to the applied voltage can improve the operability.

  (2) According to this embodiment, when the magnetic film 25 is arranged on the TFT array substrate 2, the magnetic film 25 is arranged so that the magnetic force lines 35 formed by the magnetic film 25 travel in an arc shape. The liquid crystal 5 is inclined in a plurality of directions in an arc shape. There is a correlation between the tilt direction of the liquid crystal 5 and the viewing angle dependency, and the liquid crystal 5 tilts in a plurality of directions, so that the viewing angle is wide. Therefore, the liquid crystal display device 1 can have a wide viewing angle.

  (3) According to the present embodiment, since the magnetic film 25 is disposed in the region facing the gate wiring 32 or the source wiring 33, in addition to the region of the gate wiring 32 or the source wiring 33 between the pixels. The magnetic film 25 was disposed without increasing the region where the magnetic film 25 was disposed. Therefore, it is possible to efficiently use a region that does not need to have light transmittance between pixels. As a result, the aperture ratio of the liquid crystal display device can be maintained even when a magnetic film having no light transmittance is provided.

(Second Embodiment)
Next, a liquid crystal display device according to a second embodiment of the present invention will be described with reference to a schematic plan view of an essential part of the liquid crystal display device of FIG.

  This embodiment is different from the first embodiment in that the shape of the magnetic film 25 shown in FIG. 4 is different. As shown in FIG. 10, in this embodiment, the four tip portions 50a of the magnetic film 50 having a substantially cross shape are formed to have a cross-sectional area narrower than the root portion 50b. The magnetic film 50 is configured so that the lines of magnetic force emitted from the tip portion of the magnetic film are not too strong.

  If the magnetic lines of force are too strong at the tip 50a of the magnetic film 50, the liquid crystal 5 near the tip 50a is too tilted to display white even when no voltage is applied, so the magnetic lines of force are concentrated and emitted from the tip 50a. It is preferable to disperse and release. In this embodiment, the magnetic film 50 is prevented from being concentrated and released from the tip by forming the tip of the magnetic film 50 to be narrower than the base 50b.

As described above, according to this embodiment, in addition to the effects (1) to (3) of the first embodiment, the following effects are obtained.
(1) According to this embodiment, since the tip of the magnetic film 50 is formed to be narrower than the root portion 50b, the magnetic field lines are less likely to be concentrated and released from the tip. Therefore, it is possible to prevent the liquid crystal 5 from being inclined too much near the tip of the magnetic film 50 and displaying white as in the voltage application even when no voltage is applied.

(Third embodiment)
Next, a liquid crystal display device according to a third embodiment of the present invention will be described with reference to a schematic plan view of an essential part of the liquid crystal display device of FIG.

  This embodiment is different from the second embodiment in that the shape of the magnetic film 50 shown in FIG. 10 is different.

  As shown in FIG. 11, in the present embodiment, the magnetic film 51 is arranged in a shape obtained by connecting substantially cross shapes. Thereby, the volume of the magnetic film 51 is formed larger than the volume of the magnetic film 25 in the first embodiment and the magnetic film 50 in the second embodiment. The strength of the magnetic field is such that the larger the volume occupied by the material constituting the magnetic film, the stronger the magnetic field can be formed, and the magnetic film 51 of the present embodiment is the same as the magnetic film 25 or the second film in the first embodiment. Compared with the magnetic film 50 in the embodiment, a stronger magnetic field is formed.

As described above, according to the present embodiment, in addition to the effects (1) to (3) of the first embodiment and the effect (1) of the second embodiment, the following effects are obtained.
(1) According to the present embodiment, since the volume of the magnetic film 51 can be increased as compared with the first and second embodiments, the strength of the magnetic field emitted from the magnetic film 51 can be increased. Therefore, the range in which the liquid crystal 5 is slightly tilted when no voltage is applied can be widened. For example, when the strength of the magnetic field is weak with respect to the area of the pixel electrode, there are many liquid crystals 5 that are not inclined when no voltage is applied. Since the liquid crystal 5 is pushed and tilted by the adjacent liquid crystal 5 when a voltage is applied, the reaction time required for the tilt of the liquid crystal 5 becomes long. Like the magnetic film 51 of the present embodiment, the shape in which the substantially cross shape is connected is widened so that the range in which the liquid crystal 5 is slightly tilted when no voltage is applied is widened. It is possible to shorten the reaction time required for. Since the liquid crystal 5 that is slightly tilted when no voltage is applied is further tilted when a voltage is applied, the reaction time when a voltage is applied is shorter than the liquid crystal 5 that is not tilted when no voltage is applied. Therefore, in this embodiment, since the range in which the liquid crystal 5 is slightly tilted when no voltage is applied can be widened, the liquid crystal display device 1 can shorten the reaction time when the voltage is applied.

(Fourth embodiment)
Next, a liquid crystal display device according to a fourth embodiment of the present invention will be described with reference to a schematic plan view of an essential part of the liquid crystal display device of FIG.

  This embodiment is different from the third embodiment in that the shape of the magnetic film 51 and the position of the magnetic pole shown in FIG. 11 are different.

  As shown in FIG. 12, in this embodiment, the magnetic film 52 is configured with the same width, and the N poles 34 are disposed at two opposing positions in the four corners of the pixel electrode 14 in the magnetic film 52. The S poles 36 are arranged at two positions opposite to the N pole 34 within the four corners of the pixel electrode 14 in the magnetic film 52. Also in the arrangement of the magnetic poles, the magnetic force lines 35 progress from the N pole to the S pole in a circular arc.

  When no voltage is applied, the liquid crystal 5 is inclined in a plurality of directions in an arc shape in the same manner as the direction of travel of the magnetic lines of force 35. As in the third embodiment, the liquid crystal 5 is tilted in a plurality of directions, so that the viewing angle dependency is reduced. In the third embodiment, one magnetic pole affects two adjacent pixel electrodes 14. In this embodiment, one magnetic pole affects four adjacent pixel electrodes 14. Placed in position. For example, when the pixel electrode 14 is arranged in 3 rows and 3 columns, the N pole 34 and the S pole 36 are both arranged in 12 places in the third embodiment, but in the fourth embodiment N Each of the pole 34 and the S pole 36 is arranged at eight locations.

As described above, according to this embodiment, in addition to the effects (1) to (3) of the first embodiment and (1) of the third embodiment, the following effects are obtained. (1) This embodiment According to the embodiment, since the number of magnetic poles can be reduced as compared with the third embodiment, the number of places to be magnetized in the magnetization process can be reduced. Therefore, the magnetic film 52 can be manufactured with high productivity.

(Fifth embodiment)
Next, a liquid crystal display device according to a fifth embodiment of the present invention will be described with reference to a schematic plan view of an essential part of the liquid crystal display device of FIG.

This embodiment is different from the fourth embodiment in that the shape of the magnetic film 52 shown in FIG. 12 is different.
As shown in FIG. 13, in the present embodiment, the magnetic film 53 is disposed only on the source wiring 33. Since the magnetic poles are arranged at the same position as in the fourth embodiment, the traveling direction of the magnetic force lines 35 is the same traveling direction as in the fourth embodiment. That is, the magnetic poles only need to be arranged so that the liquid crystal 5 can be inclined in multiple directions and the magnetic lines of force 35 can be arranged, and the magnetic film 53 does not have to be arranged over the entire circumference of the pixel. However, since the volume of the magnetic film 53 exerted on one pixel is smaller than that in the fourth embodiment, the strength of the magnetic force lines 35 is reduced.

As described above, according to the present embodiment, in addition to the effects (1) to (3) of the first embodiment and the effect (1) of the fourth embodiment, the following effects are obtained.
(1) According to the present embodiment, since the volume of the magnetic film 53 is reduced compared to the fourth embodiment, the material of the magnetic film 53 and the binder material can be reduced, and manufacturing is performed with resource saving. Can do.

(Sixth embodiment)
Next, a liquid crystal display device according to a sixth embodiment of the present invention will be described using a schematic cross-sectional view of the relevant part of the liquid crystal display device of FIG.

This embodiment is different from the first embodiment in that the thickness of the magnetic film 25 shown in FIG. 3 is different.
As shown in FIG. 14, in this embodiment, the magnetic film 54 has a thickness from the insulating film 24 to the counter electrode 13. In the first embodiment, a spacer (not shown) is arranged to regulate the dimension between the counter electrode 13 and the pixel electrode 14. In the present embodiment, the magnetic film 54 also functions as a spacer, and the spacer is excluded.

As described above, according to this embodiment, in addition to the effects (1) to (3) of the first embodiment, the following effects are obtained.
(1) According to the present embodiment, the magnetic film 54 has a function of tilting the liquid crystal 5 at a minute angle in a predetermined direction when no voltage is applied, and a spacer that regulates the dimension between the counter electrode 13 and the pixel electrode 14. It has both functions. Therefore, since it is not necessary to arrange an element having a spacer function, the step of arranging an element having a spacer function can be eliminated, so that it can be manufactured with high productivity.

(Seventh embodiment)
Next, an electronic apparatus provided with the liquid crystal display device 1 of the first to sixth embodiments will be described.
FIG. 15 is a schematic perspective view showing an example in which a liquid crystal display device is mounted on a personal computer. As shown in FIG. 15, the main body of a personal computer 60 as an electronic device includes a display device 61 as a display unit that displays information. The display device 61 is provided with the liquid crystal display device 1 manufactured according to the first to sixth embodiments. The display device 61 arranged in the personal computer 60 is equipped with the liquid crystal display device 1 manufactured according to the above-described embodiment and having good liquid crystal operability in the intermediate lightness display. An electronic device including the liquid crystal display device 1 with good liquid crystal operability in display is provided.

Note that the present invention is not limited to the above-described embodiment, and various changes and improvements can be added. A modification will be described below.
(Modification 1) In the first embodiment, two N poles and two S poles are arranged on the magnetic film 25 around one pixel electrode 14, but the present invention is not limited to this. Three or more N poles and three or more S poles may be arranged. The magnetic poles may be arranged so that the lines of magnetic force radiated from the magnetic poles are directed in multiple directions.

  (Modification 2) In the first embodiment, the magnetic film disposed between the pixels is disposed so that the lines of magnetic force are radiated to both pixels, but the present invention is not limited to this. A magnetic film may be disposed for each pixel, and a plurality of magnetic films may be disposed between the pixels. A pattern of different magnetic force lines may be arranged for each pixel.

  (Modification 3) In the first embodiment, the magnetic film 25 is disposed on the TFT array substrate 2, but the present invention is not limited to this. The magnetic film 25 may be disposed on the counter substrate 3. At this time, it is desirable to dispose the magnetic film 25 in a region facing the black mask 30.

  (Modification 4) In the first embodiment, the insulating film 24 is formed flat and the magnetic film 25 is formed on the insulating film 24. However, the present invention is not limited to this. A recess may be formed on the insulating film 24 at a position where the magnetic film 25 is disposed, and the magnetic film 25 may be formed in the recess.

  (Modification 5) In the seventh embodiment, the liquid crystal display device 1 as an electro-optical device is used for the display unit of the personal computer 60. However, the present invention is not limited to this. For example, electronic book, mobile phone, digital still camera, LCD TV, viewfinder type or monitor direct-view type video tape recorder, car navigation device, pager, electronic notebook, calculator, word processor, workstation, video phone, POS terminal, touch panel It can be suitably used as an image display means of electronic equipment such as. In any case, it is possible to provide an electronic device including the liquid crystal display device 1 having a high aperture ratio in displaying intermediate brightness when displaying a white display and a black display on the display unit.

1 is a schematic plan view of a liquid crystal display device according to a first embodiment. 1 is a schematic cross-sectional view of a liquid crystal display device. The principal part schematic cross section of a liquid crystal display device. The principal part schematic plan view of a liquid crystal display device. 4A and 4B illustrate a liquid crystal operation of a liquid crystal display device. The flowchart of the manufacturing method of a magnetic film. (A)-(c) is a figure explaining the manufacturing method of a magnetic film. (A)-(c) is a figure explaining the manufacturing method of a magnetic film. The model perspective view of a magnetizing head. The principal part schematic plan view of the liquid crystal display device which concerns on 2nd Embodiment. The principal part schematic plan view of the liquid crystal display device which concerns on 3rd Embodiment. The principal part schematic top view of the liquid crystal display device which concerns on 4th Embodiment. The principal part schematic top view of the liquid crystal display device which concerns on 5th Embodiment. The principal part schematic cross section of the liquid crystal display device which concerns on 6th Embodiment. The schematic perspective view which shows the personal computer which concerns on 7th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display device, 2 ... TFT array board | substrate as a board | substrate, 3 ... Opposite board | substrate, 14 ... Pixel electrode, 21 ... TFT as a switching element, 25, 50, 51, 52, 53, 54 ... As a magnetic film pattern Magnetic film 32: Gate wiring as a synchronous wiring, 33: Source wiring as a data wiring, 34 ... N pole, 35 ... Magnetic field line, 36 ... S pole, 38 ... Concave as a groove, 60 ... Personal computer as electronic equipment .

Claims (9)

A liquid crystal display device in which an electrode is formed on an opposing surface between a pair of substrates, and a liquid crystal layer composed of liquid crystals exhibiting vertical alignment when no voltage is applied is sandwiched between the substrates,
A pixel constituting a display unit, and a magnetic film disposed around the pixel,
The liquid crystal display device according to claim 1, wherein the liquid crystal is tilted by lines of magnetic force emitted from the magnetic film when no voltage is applied to the electrode. The liquid crystal display device according to claim 1,
A plurality of the pixels;
The liquid crystal display device, wherein the magnetic film is disposed between adjacent pixels around the pixel and emits magnetic force to the liquid crystal region corresponding to both the adjacent pixels. The liquid crystal display device according to claim 1 or 2,
A magnetic pole of the magnetic film around the pixel is disposed so that a pair of N-pole regions are substantially opposed and a pair of S-pole regions are substantially opposed.
A liquid crystal display device, wherein a straight line passing through the pair of N-pole regions and a straight line passing through the pair of S-pole regions are arranged substantially orthogonally. The liquid crystal display device according to claim 3,
The liquid crystal display device according to claim 1, wherein a cross-sectional area of the magnetic film in a region of the magnetic pole is narrower than a cross-sectional area of a region other than the region of the magnetic pole. A liquid crystal display device according to any one of claims 1 to 4,
The one of the pair of substrates is a substrate including a pixel electrode, a synchronization wiring, a data wiring, and a switching element,
2. A liquid crystal display device according to claim 1, wherein at least a part of the magnetic film is arranged in a region facing the synchronization wiring and the data wiring. A liquid crystal display device according to any one of claims 1 to 5,
The liquid crystal display device, wherein the magnetic film is interposed between the pair of substrates and restricts a gap between the pair of substrates to a certain size.   An electronic apparatus comprising the liquid crystal display device according to claim 1. A magnetic film pattern forming method for forming a magnetic film pattern on a substrate,
Forming a bank film having a groove corresponding to the shape of the magnetic film pattern on the substrate;
A powdery material arrangement step of filling the groove with a magnetic powdery material;
A binder disposing step of disposing a liquid binder that hardens the powdery material in the powdery material filled in the groove;
A film forming step of solidifying the powdery material and the binder to form a film pattern;
A magnetic film pattern forming method comprising: a magnetizing step of magnetizing the film pattern to form the magnetic film pattern. The magnetic film pattern forming method according to claim 8,
The method for forming a magnetic film pattern, wherein in the binder arranging step, liquid droplets containing the binder are ejected and arranged.

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