JP2007199744A - Method of manufacturing liquid crystal display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device which can narrow the width of black matrices and has a high aperture ratio. <P>SOLUTION: A first substrate of the liquid crystal display device includes a gate wiring 1, source wiring 2 which intersects with the gate wiring 1, liquid crystal driving electrodes 5 consisting of a plurality of approximately parallel electrodes connected to switching elements connected to the source wiring 2 and comb-shaped common electrodes 6 which are arranged approximately parallel to the electrodes 5 and are arranged alternately and a second substrate is provided with colored layers 10 arranged in an array form and BMs 9 disposed between the colored layers. When the first and the second substrates are arranged opposite to each other, the BMs 9 are widely formed in alignment abnormal regions where the gate wiring 1, the electrodes 5 and the electrodes 6 come into proximity with each other and light leakage is generated at the time of black display and spacers are formed so as to be superposed on the BMs and the gate wiring 1 in the region where the BMs 9 are widely formed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a liquid crystal display device, and more particularly to improvement in luminance, reduction in power consumption, and cost reduction by increasing the aperture ratio.

  In a liquid crystal display device, electrodes for driving a liquid crystal layer are formed by two substrates, a thin film transistor array substrate (hereinafter referred to as a TFT substrate) and a color filter substrate (hereinafter referred to as a CF substrate), and are opposed to each other. A transparent substrate is used. The TFT substrate is formed with an array of switching elements and liquid crystal driving electrodes connected to the switching elements. The CF substrate is formed so that pixels composed of RGB colored layers and a black matrix (hereinafter referred to as BM) disposed between the colored layers correspond to the switching elements. In the meantime, a liquid crystal material is injected and display is performed by the polarization action of this liquid crystal material. Representative of the twisted nematic display method (TN method), which operates by setting the direction of the electric field applied to the liquid crystal to a direction substantially perpendicular to the substrate interface and aligning the liquid crystal molecules aligned in the horizontal direction in the vertical direction by the electric field. Conventionally, the liquid crystal driving method used has been mainly adopted.

  However, this method has a problem that when the liquid crystal molecules are aligned in the vertical direction by an electric field, the brightness varies depending on the viewing direction and the viewing angle cannot be increased because the liquid crystal molecules have a certain angle with respect to the substrate.

  As an improvement measure, a comb-like electrode pair composed of a plurality of electrodes was used as a method of rotating the liquid crystal molecules by the electric field in the horizontal direction with the direction of the electric field applied to the liquid crystal being substantially parallel to the substrate interface. A liquid crystal display device of a horizontal electric field method (In-Plane-Switching method, hereinafter referred to as IPS method) is used.

  This IPS liquid crystal display device has a wide viewing angle compared to a twisted nematic display liquid crystal display device because liquid crystal molecules are always parallel to the substrate, and has attracted attention as a liquid crystal display device for monitoring applications.

  In order to prevent liquid crystal from leaking, the liquid crystal panel is applied with an adhesive called a sealing material around the CF substrate and bonded to the TFT substrate. A fixed gap for injecting liquid crystal material is provided between the two opposing substrates. It is difficult to make the gap (gap) between the two substrates facing each other uniform, resulting in slight variations depending on the location, and changes in luminance and chromaticity, resulting in display unevenness. In general, in the IPS system, changes in luminance and chromaticity with respect to the gap are larger than in the twisted nematic display system, and therefore, in-plane uniformity of the gap is required.

  In order to make this gap constant, a large number of spacers are usually provided between the substrates in the entire area. This spacer is usually formed on the CF substrate with a structure as shown in FIG. Here, 8 is a spacer, 9 is a BM serving as a light shielding layer, 10 is a colored layer serving as an RGB pixel, and 13 is an overcoat film for flattening the CF surface.

  In the conventional liquid crystal display device, when the CF substrate and the TFT substrate are overlapped, the spacer 8 is disposed at the position shown in FIGS. 10 and 11 on the TFT substrate. Here, 1 is a gate wiring, 2 is a source wiring, 3 is a source electrode, 4 is a drain electrode, and these constitute a TFT switching element. Further, 5 is a liquid crystal driving electrode connected to the drain electrode 4, 6 is a common electrode facing the liquid crystal driving electrode 5, and 7 is a common capacitance wiring connected to the common electrode 6. The liquid crystal material is aligned by an electric field between the liquid crystal drive electrode 5 and the common electrode 6. In the IPS system, the liquid crystal drive electrode 5 and the common electrode 6 are comb-shaped in order to apply an electric field in the lateral direction. Further, the BM 9 on the CF substrate is provided at a position (a position corresponding to the gate wiring 1 and the source wiring 2) indicated by a thick line in FIGS. 10 and 11 in order to shield light between pixels. 10 and 11 are enlarged views of one pixel, and this pixel is provided in an array.

  Assuming the arrangement shown in FIG. 10, the spacer 8 is in contact with the TFT substrate on the source wiring 3. Usually, the diameter of the spacer 8 is about 10 to 20 μm. Since the pixels are provided in an array, the line width e of the BM 9 at this position is the sum of c and d shown in FIG.

  In order to maintain a stable cell gap (inter-substrate gap), it is necessary to install the spacer 8 so that the height of the spacer 8 does not vary. Therefore, it is necessary to arrange the spacer 8 and the colored layer 10 so that they do not overlap and do not protrude from the BM 9 when the substrates are arranged opposite to each other. Further, in order to prevent color loss and improve panel display quality, it is necessary to overlap the BM 9 and the colored layer 10. However, it is necessary to secure a BM9 space of about 10 to 15 μm on one side based on the width accuracy of the spacer 8 and the positional accuracy with respect to the BM9, the width accuracy of the BM9, and the width accuracy of the colored layer 10 and the positional accuracy with respect to the BM9. Therefore, the aperture ratio is lowered, and the luminance is lowered. Therefore, there has been a problem that it is impossible to reduce the power consumption and the cost of the backlight of the liquid crystal display device.

  Assuming the arrangement shown in FIG. 11, the spacer 8 is in contact with the TFT substrate on the gate wiring 1. The line width e of the BM 9 at this position is the sum of a and b shown in FIG. 11, and is about 30 μm.

  However, also in this case, in order to provide the spacer 8 so that gap unevenness does not occur, it is necessary to further increase the BM width (about 35 to 45 μm). Therefore, the aperture ratio is lowered, and the luminance is lowered. Therefore, there has been a problem that it is impossible to reduce the power consumption and the cost of the backlight of the liquid crystal display device.

  Further, in the conventional TFT substrate shown in FIGS. 10 and 11, when the width of the gate wiring 1, the source wiring 2 and the BM 9 is narrowed to improve the aperture ratio, the BM around the spacer 8 cannot be narrowed. There was a problem that it hindered rate improvement.

  The present invention has been made to solve such problems, and an object thereof is to provide a liquid crystal display device having a high aperture ratio and a high luminance.

  The method for manufacturing a liquid crystal display device according to the present invention includes a first substrate and a second substrate that are arranged to face each other, and a spacer that keeps the distance between the substrates substantially constant (for example, the spacer 8 in the embodiment of the present invention). And a liquid crystal layer sandwiched between the substrates, and a gate wiring (for example, the gate wiring 1 in the embodiment of the present invention) on the first substrate, A source wiring crossing the gate wiring through an insulating film (for example, source wiring 2 in the embodiment of the present invention), a switching element connected to the source wiring, and a plurality of wirings connected to the switching element. A liquid crystal drive electrode (for example, the liquid crystal drive electrode 5 in the embodiment of the present invention) and a plurality of electrodes arranged substantially parallel and alternately with the liquid crystal drive electrode. A common layer (for example, the common layer 6 in the embodiment of the present invention) and arranged in an array on the second substrate (for example, the colored layer in the embodiment of the present invention). 10), and when the first substrate and the second substrate are disposed to face each other between the colored layers, the gate wiring, the liquid crystal driving electrode, and the common electrode are close to each other, and a black display is provided. A light-shielding layer (for example, BM9 in the embodiment of the present invention) is formed so as to be wide in an abnormal alignment region where light leakage sometimes occurs, and the first substrate and the second substrate are arranged to face each other. In the region where the light shielding layer is formed wide, the spacer is formed so as to overlap the light shielding layer and the gate wiring. Thereby, an aperture ratio can be improved and a brightness | luminance can be improved.

  The method for manufacturing a liquid crystal display device according to the present invention includes a first substrate and a second substrate arranged opposite to each other, a spacer that keeps a distance between the substrates substantially constant, and a liquid crystal layer sandwiched between the substrates. A liquid crystal display device comprising: a gate wiring on the first substrate; a source wiring intersecting the gate wiring through an insulating film; a switching element connected to the source wiring; A liquid crystal drive electrode connected to the switching element and made up of a plurality of substantially parallel electrodes, and a common electrode made up of a plurality of electrodes arranged substantially parallel and alternately with the liquid crystal drive electrodes, When the colored layers arranged in an array are formed on the second substrate, and the first substrate and the second substrate are arranged opposite to each other between the colored layers, the source wiring and the liquid crystal Drive electrode and common electrode are close In addition, a light shielding layer is formed so as to be wide in an abnormal alignment region where light leakage occurs during black display, the first substrate and the second substrate are arranged to face each other, and the light shielding layer is formed wide. In the region, the spacer is formed so as to overlap the light shielding layer and the source wiring. Thereby, an aperture ratio can be improved and a brightness | luminance can be improved.

  The method for manufacturing a liquid crystal display device according to the present invention includes a first substrate and a second substrate arranged opposite to each other, a spacer that keeps a distance between the substrates substantially constant, and a liquid crystal layer sandwiched between the substrates. A liquid crystal display device comprising: a gate wiring on the first substrate; a source wiring intersecting the gate wiring through an insulating film; a switching element connected to the source wiring; Forming a liquid crystal driving electrode connected to the switching element, a common electrode provided opposite to the liquid crystal driving electrode, and a common capacitor wiring provided substantially parallel to the gate wiring and connected to the common electrode When the colored layer arranged in an array is formed on the second substrate, and the first substrate and the second substrate are arranged to face each other between the colored layers, the source Wiring and common capacitance wiring A light shielding layer is formed so as to be wide in an alignment abnormal region near the position where light leakage occurs during black display, the first substrate and the second substrate are arranged to face each other, and the light shielding layer is widened. In the region formed in step 1, the spacer is formed so as to overlap the light shielding layer and the intersection position of the source wiring and the common capacitor wiring. Thereby, an aperture ratio can be improved and a brightness | luminance can be improved.

  The spacer is preferably formed on the second substrate. Thereby, an aperture ratio can be improved and a brightness | luminance can be improved.

  The spacer may have a columnar shape. Thereby, an aperture ratio can be improved and a brightness | luminance can be improved.

  According to the present invention, the width of the black matrix can be reduced, and a high aperture ratio liquid crystal display device can be provided.

Embodiment 1 of the Invention
In the liquid crystal display device according to the present invention, a TFT substrate and a CF substrate are arranged to face each other like a conventional liquid crystal display device, and a liquid crystal material is sandwiched between the substrates. The structure of the pixel portion of this liquid crystal display device is shown in FIG. FIG. 1 shows the configuration of one pixel of the TFT substrate. 1 is a gate wiring, 2 is a source wiring, 3 is a source electrode, 4 is a drain electrode, 5 is a liquid crystal drive electrode, 6 is a common electrode, 7 is a common capacitance wiring, 8 is a spacer, and 9 is a BM.

  Next, the manufacturing process of this TFT substrate will be described. First, a conductive film such as Al, Cr, Mo, Ti, or W is formed on an insulating substrate by a sputtering apparatus. Then, the gate wiring 1 and the common capacitor wiring 7 are formed by a photolithography process, an etching process, and a resist removal process.

Next, an insulating film such as SiN _x and a semiconductor film of an a-Si film are formed on the insulating substrate on which the gate wiring 1 and the common capacitor wiring 7 are formed by a plasma CVD apparatus. Here, an n ⁺ a-Si layer is formed as an ohmic layer by doping impurities such as P and As on the surface of the semiconductor film. Then, a semiconductor layer is formed by a photolithography process, an etching process, and a resist removal process.

  Further, in order to form the drain electrode 2, the source electrode 3, and the source wiring 5 from above, a conductive film such as Al, Cr, Mo, Ti, and W is formed by a sputtering apparatus. Then, the drain electrode 2, the source electrode 3, and the source wiring 2 are formed by a photolithography process, an etching process, and a resist removal process.

Thereafter, an SiN _x film as an interlayer insulating film is formed, and contact holes are formed by a photolithography process, a resist removal process, and an etching process. Then, a transparent conductive film such as an ITO film is formed. The liquid crystal driving electrode 4 and the common electrode 6 face each other in a comb shape by the photolithography process, the etching process, and the resist removal process. In addition, the drain electrode 4, the liquid crystal drive electrode 5, the common electrode 6, and the common capacitor wiring 7 are in contact with each other through the contact hole. A TFT is formed by the above process, and a TFT substrate provided with the TFT in an array is used for a liquid crystal display device.

  In the case of a lateral electric field type TFT substrate, the liquid crystal driving electrode 4 and the common electrode 6 may be formed of a metal film such as Cr, Al, Mo, Ti, W, etc. Furthermore, as a multilayer structure of a metal Cr or Cr oxide film. Also good. Further, the liquid crystal driving electrode 4 or the common electrode 6 may be formed in the same process as the drain electrode 3.

  Further, the TFT substrate is washed and an alignment film is applied. Thereafter, firing and rubbing are performed. Here, rubbing treatment was performed in a direction substantially parallel to the source wiring 2. Thus, when the TFT is in the OFF state, the liquid crystal molecules are aligned in a direction substantially parallel to the source wiring 2.

  Next, the CF manufacturing process will be described with reference to FIG. First, a Cr film is formed on an insulating substrate by a sputtering apparatus. Then, BM9 which is a light shielding layer is formed by the photoengraving process etc. Here, the Cr film is formed by sputtering, but it may be a two-layer film of metal Cr and Cr oxide, and may be another film type such as Ni or Al. Further, the film forming method is not limited to the sputtering method, but may be another film forming method such as an evaporation method. Further, a resin black matrix in which a light shielding agent is dispersed in the resin may be used.

  From above, R pigment is applied onto the substrate. Thereafter, the pigment is patterned by resist coating, exposure, and development steps, and an R colored layer 10a is formed between BM9. This is repeated for the G colored layer 10b and the B colored layer 10c to form the three primary color layers. Here, the colored layer 10 and the BM 9 are overlapped so that light does not leak. In this embodiment, the pigment method is used. However, the present invention is not limited to this, and any of a dyeing method, an electrodeposition method and a printing method may be used.

  A transparent overcoat film 13 is applied thereon and planarized. Further, an alignment film 11 is formed thereon. Then, baking and rubbing are performed in the same manner as the alignment film of the TFT substrate. Here, rubbing processing was performed in a direction substantially parallel to the source wiring 2. Therefore, when the TFT is in the OFF state, the liquid crystal molecules are aligned in a direction substantially parallel to the source wiring 2. The overcoat film 13 has heat resistance and chemical resistance, and also has a role of protecting the colored layer 10. Here, the overcoat film 13 and the alignment film 11 are separate films, but the overcoat film 13 and the alignment film 11 may be formed of the same film.

  Then, a spacer 8 for providing a gap for injecting a liquid crystal material between the TFT substrate and the CF substrate is formed. The spacer 8 is formed by a photo process after applying a resin layer. Here, the spacer 8 is formed in a tapered columnar shape as shown in FIG. 8, and its cross section is substantially circular. The diameter of the base (contact surface on the CF substrate side) is about 15 μm. In general, the larger the area, the better the in-plane uniformity of the gap. However, the overlap with the colored layer 10 and the protrusion from the BM 9 impair the in-plane uniformity of the gap between the substrates, so it is necessary to secure the BM width. The aperture ratio is reduced.

  The TFT substrate and the CF substrate thus formed are bonded together with a sealing material, and a liquid crystal material is injected. A liquid crystal panel is formed by the process as described above. Here, the BM 9 is arranged in a region surrounded by a thick line in FIG.

  Next, the state of the liquid crystal molecules in the region where the gate wiring 1, the liquid crystal drive electrode 5 and the common electrode 6 on the TFT substrate are close will be described with reference to FIG. FIG. 2 is an enlarged view of a region A indicated by a dotted line in FIG. The same reference numerals as those in FIG. 1 are the same as those in FIG. Here, 12 is a liquid crystal molecule sandwiched between the TFT substrate and the CF substrate, and a dotted line is an electric force line when a voltage is applied only to the gate wiring 1.

  Here, as shown in FIG. 2, the alignment film 11 was rubbed in a direction substantially perpendicular to the gate wiring 1. Since no voltage is applied to the liquid crystal drive electrode 5 when the TFT is OFF, the potential difference between the liquid crystal drive electrode 5 and the common electrode 6 approaches zero. Therefore, the liquid crystal molecules 12 are aligned in the same direction as the rubbing direction and block the backlight. Therefore, a normally black mode IPS liquid crystal display device is obtained.

  When the liquid crystal is driven, the gate voltage fluctuates, a potential difference is generated in the vicinity of the gate wiring 1, and the lines of electric force are in the same direction as the rubbing direction as shown by the dotted line. In regions other than the light leakage region C in the vicinity of the gate wiring 1, the liquid crystal driving electrode 5 and the gate wiring 1, the common electrode 6 and the gate wiring 1 are substantially parallel. Therefore, the electric lines of force between them are almost perpendicular to the gate wiring 1. Accordingly, the liquid crystal molecules 12 are aligned in the rubbing direction, and the backlight is blocked.

  However, in the light leakage region C surrounded by the dotted line in FIG. 2, the direction of the electric lines of force is different from the rubbing direction as shown in FIG. Accordingly, the liquid crystal molecules 12 are tilted and light leakage occurs. In order to maintain the contrast, the BM 9 for shielding light in the light leakage region C is required. This region becomes a misalignment region requiring light shielding because light leakage occurs during black display.

  In the present embodiment, the spacer 8 is disposed at this position. The line width e of the BM 9 on the gate wiring 1 other than this region is the sum of a and b shown in FIG. 1 and is about 30 μm. Therefore, the spacer 8 protrudes from the BM 9 or overlaps the colored layer 10 depending on the width accuracy of the spacer 8 and the positional accuracy with respect to the BM 9 and the width accuracy of the BM 9 and the width accuracy of the colored layer 10 and the positional accuracy with respect to the BM 9 when the CF substrate is formed. Therefore, the in-plane uniformity of the cell gap is impaired.

  In the region where the gate wiring 1, the liquid crystal drive electrode 5, and the common electrode 6 are close to each other, the light leakage region C is shielded, so that the width of the BM 9 is larger. Therefore, by disposing the spacer 8 here, the protrusion from the BM 9 and the overlap with the colored layer 10 can be prevented. Further, the wiring width and BM width other than the abnormal alignment region can be reduced, and the BM area can be reduced. As a result, a high aperture ratio can be realized, and an improvement in luminance can be expected. Furthermore, power saving and cost reduction of the backlight can be achieved.

  As described above, in the first embodiment, a spacer is provided in a region where the gate wiring 1, the liquid crystal drive electrode 5, and the common electrode 6 that need to have a wide BM width due to light leakage, that is, an alignment abnormality region, This is intended to improve the aperture ratio.

Embodiment 2 of the present invention.
A liquid crystal display device according to the present invention will be described with reference to FIGS. The same reference numerals as those in FIGS. 1 and 2 are the same as those in FIGS.

  FIG. 3 shows the configuration of the pixel portion of the liquid crystal display device according to the second embodiment. FIG. 4 is an enlarged view of a region B indicated by a dotted line in FIG. Also in the second embodiment, the manufacturing method of the TFT substrate and the CF substrate is the same as that of the first embodiment. The rubbing direction is the same direction.

  As shown in FIG. 3, in the second embodiment, the position of the spacer 8 is different from that in the first embodiment. Here, the spacer 8 is disposed in a region where the source line 2, the liquid crystal drive electrode 5, and the common capacitor line 6 are close to each other.

  The state of the liquid crystal molecules in this region will be described with reference to FIG. As described above, the alignment film 11 is rubbed perpendicularly to the gate wiring 1, that is, substantially parallel to the source wiring 2. Here, the source voltage fluctuates when the liquid crystal is driven. Therefore, when a voltage is applied only to the source line 2, the electric lines of force near the source line 2 are as shown in FIG. Therefore, the liquid crystal molecules 12 are tilted as in the first embodiment, and light leakage occurs. Further, the lines of electric force between the liquid crystal drive electrode 5 and the source wiring 2 are substantially perpendicular to the rubbing direction. Therefore, as shown in FIG. 4, the liquid crystal molecules 12 are aligned perpendicular to the rubbing direction. Again, light leaks. This region becomes a misalignment region requiring light shielding because light leakage occurs during black display.

  For the above reason, light leakage occurs in the light leakage region D indicated by the dotted line in FIG. Therefore, in order to maintain the contrast, a BM 9 for shielding light is necessary in this region, and the BM width in this region D needs to be widened. Therefore, by disposing the spacer 8 here, the protrusion from the BM 9 and the overlap with the colored layer 10 can be prevented. In addition, the wiring width and BM width other than the abnormal alignment region can be reduced, and the BM area can be reduced. As a result, a high aperture ratio can be realized, and an improvement in luminance can be expected. Furthermore, power saving and cost reduction of the backlight can be achieved. In this case, it is necessary to increase the BM area around the region B.

  As described above, in the second embodiment, the spacer 8 is provided in the alignment abnormal region where the source wiring 2, the liquid crystal driving electrode 5, and the common capacitor wiring 6 in the pixel portion are close to improve the aperture ratio.

Embodiment 3 of the present invention.
The same effect can be obtained even if the spacer 8 is provided in the orientation abnormal region where it is necessary to widen the width of the BM 9 other than the first and second embodiments. For example, the spacer 8 may be disposed in the vicinity of the intersection position of the gate wiring 1 and the source wiring 2 shown in FIG. Here, the gate wiring 1, the source wiring 2, the common electrode 6 and the liquid crystal driving electrode 5 are close to each other. The electric field generated by these potential differences disturbs the orientation of the liquid crystal molecules and causes light leakage. Therefore, this region becomes an orientation abnormal region requiring light shielding, and the BM9 width needs to be increased. By providing the spacer 8 in this region, the BM area can be reduced and a high aperture ratio can be realized. In this case, it is necessary to provide a wide BM around the TFT as shown in FIG.

  Furthermore, the liquid crystal panel having the above arrangement can be used not only in the IPS system but also in a conventional TN system liquid crystal display device. As a result, the BM width can be narrowed, and a high aperture ratio can be expected.

Embodiment 4 of the present invention.
Further, as shown in FIG. 6, the spacer 8 may be arranged in the vicinity of the intersection position of the source line 2 and the common capacitor line 6. Here, since the source wiring 2 and the common capacitance wiring 6 intersect, the liquid crystal alignment is disturbed by the lines of electric force generated by the potential difference between the two wirings, and light leakage occurs. Therefore, the BM width in the area other than this area can be reduced. Thereby, the BM area can be reduced, and a high aperture ratio can be realized.

  Furthermore, the liquid crystal panel having the above arrangement can be used not only in the IPS system but also in a conventional TN system liquid crystal display device. As a result, a high aperture ratio can be expected by reducing the BM area.

  In the first to fourth embodiments described above, the spacer 8 is arranged in the alignment abnormal region where light leakage occurs and the width of the BM needs to be increased. Thereby, the BM width in places other than the orientation abnormal region can be narrowed, and the BM area can be reduced. Accordingly, the luminance of the liquid crystal display device can be improved, and power saving and cost reduction of the backlight can be realized.

Other embodiments.
Further, as shown in FIG. 7, a spacer 8 may be disposed on the common capacitor wiring 7. Here, the spacer 8 is provided not on the BM 9 but on the colored layer 10 on the CF substrate. Since the common capacitor wiring 7 is formed of a metal film as described in the first embodiment, the backlight light is shielded. Therefore, the light shielding layer BM9 is not required, and the spacer 8 can be disposed without any deterioration in display characteristics. Therefore, the BM area can be reduced without arranging the spacer 8 on the BM 9. In this case, it is desirable to form the liquid crystal drive electrode 5 and the common electrode 6 with a non-transparent conductive film such as a metal film. In the present embodiment, as shown in FIG. 7, the area of the BM 9 near the gate wiring 1 can be reduced.

  Furthermore, the liquid crystal panel having the above arrangement can be used not only in the IPS system but also in a conventional TN system liquid crystal display device. Similarly, a high aperture ratio can be expected, and the luminance of the liquid crystal display device can be improved.

  The shape of the spacer 8 is not limited to a columnar shape, but may be a dome shape, a spherical shape, a cylindrical shape, or the like. Further, when the spacer 8 is provided in the abnormal alignment region, the diameter of the spacer 8 may be 15 μm or more depending on the area of the abnormal alignment region. Thereby, the in-plane uniformity of the gap between the substrates is improved, and display unevenness of luminance and chromaticity within the substrate surface can be suppressed. The cross section of the spacer 8 is not limited to a circle but may be a polygon such as a triangle or a rectangle. Further, the spacer 8 may be formed on the TFT substrate.

The TFT array substrate according to the present invention is not limited to the film type and the formation method mentioned in the manufacturing method shown in the first embodiment, and other film types and formation methods can be used as long as the spacers are arranged on the TFT. Similar effects can be obtained. For example, in addition to Al, Cr, Mo, Ti, and W, the conductive film may be a metal such as Ni, Ag, Ta, or Cu and an alloy containing these as a main component. Furthermore, the insulating film is not limited to SiN _x and may be SiO ₂ . The semiconductor layer 1 is not limited to an a-Si film (amorphous silicon) but may be a p-Si film (polysilicon). In order to form an ohmic layer, an n ⁺ a-Si layer is formed by doping P and As. However, a p ⁺ a-Si layer may be formed as an ohmic layer by doping B. Further, the film forming method is not limited to the sputtering method and the plasma CVD method, and an evaporation method, a low pressure CVD method, and an atmospheric pressure CVD method may be used. The same effect can be obtained by these.

1 is a configuration diagram of a pixel portion of a liquid crystal display device according to Embodiment 1 of the present invention. It is an enlarged view of the area | region A of FIG. It is a block diagram of the pixel part of the liquid crystal display device concerning Embodiment 2 of this invention. It is an enlarged view of the area | region B of FIG. It is a block diagram of the pixel part of the liquid crystal display device concerning Embodiment 3 of this invention. It is a block diagram of the pixel part of the liquid crystal display device concerning Embodiment 4 of this invention. It is a block diagram of the pixel part of the liquid crystal display device concerning other embodiment of this invention. It is a block diagram of CF board | substrate of the liquid crystal display device concerning this invention. It is a block diagram of CF board | substrate. It is a block diagram of the pixel part of the conventional liquid crystal display device. It is a block diagram of the pixel part of the conventional liquid crystal display device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gate wiring 2 Source wiring 3 Source electrode 4 Drain electrode 5 Liquid crystal drive electrode
6 Common electrode 7 Common capacitance wiring 8 Spacer 9 BM (Black matrix)
10 Colored layer
10a R colored layer 10b G colored layer 10c B colored layer 11 Alignment film 12 Liquid crystal molecule 13 Overcoat film

Claims (5)

A first substrate and a second substrate disposed opposite to each other;
A spacer for separating the distance between the substrates substantially constant;
A liquid crystal display device comprising a liquid crystal layer sandwiched between the substrates,
On the first substrate, gate wiring;
A source wiring intersecting with the gate wiring through an insulating film;
A switching element connected to the source wiring;
A liquid crystal drive electrode connected to the switching element and comprising a plurality of substantially parallel electrodes;
Forming a common electrode composed of a plurality of electrodes arranged substantially parallel and alternately with the liquid crystal driving electrode;
Forming a colored layer arranged in an array on the second substrate;
When the first substrate and the second substrate are disposed opposite to each other between the colored layers, light leakage occurs during black display when the gate wiring, the liquid crystal drive electrode, and the common electrode are close to each other. Form a light-shielding layer so that it is wide in the abnormal orientation region,
Manufacturing of a liquid crystal display device in which the first substrate and the second substrate are arranged to face each other and the spacer is formed so as to overlap the light shielding layer and the gate wiring in a region where the light shielding layer is formed wide. Method. A first substrate and a second substrate disposed opposite to each other;
A spacer for separating the distance between the substrates substantially constant;
A method of manufacturing a liquid crystal display device comprising a liquid crystal layer sandwiched between the substrates,
On the first substrate, gate wiring;
A source wiring intersecting with the gate wiring through an insulating film;
A switching element connected to the source wiring;
A liquid crystal drive electrode connected to the switching element and comprising a plurality of substantially parallel electrodes;
Forming a common electrode composed of a plurality of electrodes arranged substantially parallel and alternately with the liquid crystal driving electrode;
Forming a colored layer arranged in an array on the second substrate;
When the first substrate and the second substrate are disposed opposite to each other between the colored layers, light leakage occurs during black display when the source wiring, the liquid crystal drive electrode, and the common electrode are close to each other. Form a light-shielding layer so that it is wide in the abnormal orientation region,
Manufacture of a liquid crystal display device in which the first substrate and the second substrate are arranged to face each other and the spacer is formed so as to overlap the light shielding layer and the source wiring in a region where the light shielding layer is formed wide. Method. A first substrate and a second substrate disposed opposite to each other;
A spacer for separating the distance between the substrates substantially constant;
A method of manufacturing a liquid crystal display device comprising a liquid crystal layer sandwiched between the substrates,
On the first substrate, gate wiring;
A source wiring intersecting with the gate wiring through an insulating film;
A switching element connected to the source wiring;
A liquid crystal drive electrode connected to the switching element;
A common electrode provided to face the liquid crystal driving electrode;
Forming a common capacitance line provided substantially parallel to the gate line and connected to the common electrode;
Forming a colored layer arranged in an array on the second substrate;
An alignment abnormality in which light leakage occurs during black display near the intersection of the source wiring and the common capacitance wiring when the first substrate and the second substrate are disposed opposite to each other between the colored layers. Form a light shielding layer so that it is wide in the area,
In the region where the first substrate and the second substrate are arranged to face each other and the light shielding layer is formed wide, the spacer is overlapped with the light shielding layer and the intersection position of the source wiring and the common capacitance wiring. A method of manufacturing a liquid crystal display device formed as described above.   4. The method for manufacturing a liquid crystal display device according to claim 1, wherein the spacer is formed on the second substrate.   The method of manufacturing a liquid crystal display device according to claim 1, wherein the spacer has a columnar shape.

Images