JP4720806B2 - LCD panel - Google Patents

Description

The present invention relates to a liquid crystal display panel, and more particularly to a transflective or reflective liquid crystal display panel in which disclination is suppressed and contrast and display quality are good.

In recent years, the application of liquid crystal display devices has rapidly spread not only in information communication equipment but also in general electric equipment. Since the liquid crystal display device does not emit light by itself, a transmissive liquid crystal display device having a backlight is often used. However, since the power consumption of the backlight is large, the power consumption is particularly large for a portable type. A reflection type liquid crystal display device that does not require a backlight to reduce it is used. However, since this reflection type liquid crystal display device uses external light as a light source, it is difficult to see in a dark room. Thus, in recent years, development of a transflective liquid crystal display device having both transmissive and reflective properties has been underway.

A liquid crystal display panel used in this transflective liquid crystal display device has a transmissive portion having a pixel electrode and a reflective portion having both a pixel electrode and a reflector in one pixel region, and is dark. Since the backlight is turned on and an image is displayed using the transmission part of the pixel area at a place, and the image is displayed using outside light at the reflection part without turning on the backlight in a bright place. Since there is no need to always turn on the backlight, there is an advantage that power consumption can be greatly reduced.

By the way, the demand for a wide viewing angle with respect to a liquid crystal display panel has not been so high since a user of a small display portion in a mobile device represented by a mobile phone or the like is limited. However, even in recent mobile devices with higher functionality, the demand for a wide viewing angle of the liquid crystal display panel in the display unit has been rapidly increased. Based on such demands for wide viewing angles for mobile devices, TN, which has been widely used for mobile devices in the past
Recently, a transflective liquid crystal display panel of MVA (Multi-domain vertically aligned) system has been developed instead of the liquid crystal display panel of the system (see Patent Documents 1 and 2 below).
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Here, an MVA transflective liquid crystal display panel disclosed in the following Patent Document 2 will be described with reference to FIGS. 4A is a perspective view showing a schematic structure of the MVA-type transflective liquid crystal display panel 50, and FIG. 4B is a tilt of the liquid crystal when an electric field is applied to the liquid crystal in the liquid crystal layer. FIG. 5 is a cross-sectional view taken along line BB of FIG. 4A.

In the transflective liquid crystal display panel 50, an inclined surface or a step 53 is provided between the reflective portion 51 and the transmissive portion 52, and the reflective portion 51 and the transmissive portion 52 are continuous via the step 53. ing. A first opening region 56 is formed in the pixel electrode 55 of the first substrate 54 in the transflective liquid crystal display panel 50 as a region where the pixel electrode 55 is not formed. This first
The opening area 56 constitutes a first alignment dividing means, and the reflection part 51 and the transmission part 5 with the step 53 interposed therebetween.
2 is formed. As a result, the pixel electrode 55 a in the reflective portion 51 and the pixel electrode 55 b in the transmissive portion 52 are connected to each other via a single line 57 extending in the length direction of the transflective liquid crystal display panel 50.

The counter electrode 59 of the second substrate 58 has a pixel electrode 55 a and a transmission part 52 in the reflection part 51.
The second opening regions 60a and 60b are formed to face the pixel electrode 55b in FIG. The second opening regions 60a and 60b constitute second alignment dividing means. The second opening regions 60a and 60b are configured as cross-shaped slits, and the second opening region 60 is further arranged so that the center of the second opening region 60a coincides with the center of the pixel electrode 55a in the vertical direction.
The center of b is arranged so as to coincide with the center of the pixel electrode 55b.

As shown in FIGS. 4B and 5, the transflective liquid crystal display panel 50 has a step difference because the liquid crystal 61 has a negative dielectric anisotropy when an electric field is applied to the liquid crystal 61 of the liquid crystal layer. The liquid crystal is inclined in the direction of the line 57 on the counter electrode 59 side on the first opening area 56 in 53, and the center of the area corresponding to the reflection part 51 in the counter electrode 59 on the reflection part 51 and the transmission part 52. Alternatively, it is inclined to the center of the region corresponding to the transmission part 52. As described above, in the transflective liquid crystal display panel 50, the alignment direction of the liquid crystal molecules is determined, so that deterioration of visual characteristics and response speed can be reduced.

The MVA transflective liquid crystal display panel 50 described above is provided with a step 53 between the reflective portion 51 and the transmissive portion 52 on the first substrate 54 side, and a cell gap d1 in the reflective portion 51 as is well known.
And the cell gap d2 in the transmissive part is d1 = (d2) / 2, and the display image quality in the reflective part 51 and the display image quality in the transmissive part are adjusted to be the same. An MVA transflective liquid crystal display panel having a configuration for adjusting the cell gap on the second substrate side is also known.

An example of an MVA transflective liquid crystal display panel 70 according to a conventional example in which a top coat layer as a configuration for adjusting the cell gap is provided on the second substrate side will be described with reference to FIGS. FIG. 6 is a plan view of one pixel showing through a second substrate of a conventional transflective liquid crystal display panel in which a top coat layer for adjusting the cell gap is provided on the second substrate side. , FIG.
These are CC sectional drawing of FIG.

In the transflective liquid crystal display panel 70, a plurality of scanning lines 72 and signal lines 73 are arranged in a matrix form directly or through an inorganic insulating film 74 on a glass substrate 71 having a transparent insulating property as a first substrate. Is formed. Here, a region surrounded by the scanning line 72 and the signal line 73 corresponds to one pixel, and a TFT (Thin Film Transistor) (not shown) serving as a switching element is formed for each pixel. The surface of the pixel TFT or the like is covered with a protective insulating film 83.

Then, a fine uneven portion is formed on the surface of the reflecting portion 75 so as to cover the scanning line 72, the signal line 73, the inorganic insulating film 74, the protective insulating film 83, and the like, and the surface of the transmitting portion 76 is flat. An interlayer film 77 made of the formed organic insulating film is laminated. 6 and 7
In FIG. 5, the uneven portion of the reflecting portion 75 is omitted. The interlayer film 77 is provided with a contact hole 80 at a position corresponding to the drain electrode D of the TFT. In each pixel, the reflective portion 75 is made of, for example, aluminum metal on the contact hole 80 and on the surface of the interlayer film 77. A reflection plate 78 is provided, and a transparent pixel electrode 79 made of, for example, ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide) is formed on the surface of the reflection plate 78 and the surface of the interlayer film 77 of the transmission portion 76. Yes.

On the reflective portion 75 side, the auxiliary capacitance line 81 is disposed below the position where the reflective plate 78 of the interlayer film 77 exists, and the reflective plate 78 and the pixel electrode 79 are adjacent to each other in the plan view. The scanning line 72 and the signal line 73 are formed so as to be slightly overlapped with each other so as not to contact the reflection plate and the pixel electrode, and to prevent light leakage, and the pixel electrode 79 on the transmissive part 76 side is adjacent. The scanning line 72 and the signal line 73 are not in contact with the pixel electrode and the reflection plate of the pixel.
It is formed so as to overlap slightly.

Further, in the transflective liquid crystal display panel 70, a slit 93 is provided in the boundary region between the reflective portion 75 and the transmissive portion 76 of the pixel electrode 79 in order to regulate the orientation of liquid crystal molecules. The pixel electrode 79a of the reflective portion 75 and the pixel electrode 79b of the transmissive portion 76 are divided, and the pixel electrode 79a of the reflective portion 75 and the pixel electrode 79b of the transmissive portion 76 are narrow portions 9.
4 is electrically connected. A vertical alignment film (not shown) is laminated on the surface of the pixel electrode 79 so as to cover all the pixels.

In addition, any one of red (R), green (G), and blue (B) formed corresponding to each pixel on the display region of the transparent glass substrate 85 of the second substrate. A striped color filter layer 86 is provided. Further, the reflection portion 75 and the transmission portion 76 are used.
And the color filter layer 86 of the reflective portion 75 is used.
A top coat layer 87 having a predetermined thickness is provided on a part of 6. This topcoat layer 8
7 is provided over the entire reflection portion 75, and the thickness thereof is the thickness of the liquid crystal layer in the reflection portion 75, that is, the so-called cell gap d1 is half of the cell gap d2 of the transmission portion 76, that is, d1 = ( d2) / 2.

In addition, protrusions 91 for restricting the alignment of the liquid crystal are respectively provided on a part of the surface of the color filter layer 86 located in the transmission part 76 and a part of the surface of the topcoat layer 87 located in the reflection part 75.
And 32, respectively, and a common electrode and a vertical alignment film (both not shown) are sequentially stacked on the surfaces of the color filter layer 86, the topcoat layer 87, and the protrusions 91 and 92.

Then, the first substrate and the second substrate are opposed to each other, and a sealing material is provided around both the substrates so that the substrates are bonded together, and a liquid crystal 29 having negative dielectric anisotropy is filled between the substrates. Thus, the MVA transflective liquid crystal display panel 70 is obtained. A backlight device having a well-known light source, a light guide plate, a diffusion sheet, and the like (not shown) is disposed below the first substrate.

In the MVA-type transflective liquid crystal display panel 70, when no electric field is applied between the pixel electrode 79 and the counter electrode, the major axis of the liquid crystal molecules in the liquid crystal layer is perpendicular to the surface of the pixel electrode and the counter electrode. Since the light is not transmitted through the liquid crystal and the light is transmitted when an electric field is applied between the pixel electrode and the counter electrode, the light leakage at the transmissive part greatly affects the display image quality. Further, the presence of the slit 93 and the protrusions 91 and 92 of the pixel electrode 79 causes the liquid crystal molecules to incline toward the protrusions 91 to 92, so that the viewing angle becomes very wide.
JP 2003-167253 A (claims, paragraphs [0050] to [0057], FIG. 1) JP 2004-069767 (Claims, paragraphs [0044] to [0053], FIG. 1) Japanese Patent Laying-Open No. 2005-173105 (Claims, paragraphs [0003] to [0004], FIGS. 3 and 4)

In a transflective liquid crystal display panel or a reflective liquid crystal display device, the contact hole 80 formed in the reflective portion needs to ensure electrical continuity between the pixel electrode 79a and the drain electrode D of the TFT as a switching element. Therefore, the contact hole 80 has a certain size and depth, and an inclined surface is formed in the contact hole 80 as shown in FIG. Such tilting of the contact hole 80 gives a physical force to the liquid crystal molecules 89 and tilts the liquid crystal molecules 89 as shown in FIG. 8 is an enlarged view conceptually showing a state in which the liquid crystal molecules 89 are inclined at the contact hole 80 portion of FIG.

In particular, even when an electric field is generated between the pixel electrode 79a and the common electrode to align the liquid crystal molecules 89, the liquid crystal molecules 89 are strongly influenced by the physical force of the contact hole 80 and travel in a desired direction. The display quality deteriorates because the display is not tilted and the display is adversely affected. Further, since the contact hole 80 is literally formed, the alignment of the liquid crystal molecules 89 is unstable due to the influence of the presence of the contact hole 80, such as unevenness in an alignment film (not shown). Further, at the entrance portion of the contact hole 80, even when no electric field is applied, the liquid crystal molecules 89 are inclined obliquely, so that light blocking at this portion is incomplete and light leakage may occur.

Further, in the vicinity of the protrusions 91 and 92 formed on the second substrate, the liquid crystal molecules 89 are not protruded 9.
The top surfaces of 1 and 92 are oriented perpendicular to the second substrate, but the protrusions 91 and 9
In the second side surface portion, the tilt is inclined with respect to the second substrate due to the inclination angle of the side surface portion. Therefore, there is a problem that light leakage occurs from the vicinity of the protrusion when no electric field is applied, and the contrast is lowered. The problem due to the protrusions in such an MVA liquid crystal display panel is also disclosed in the above-mentioned Patent Document 3. In the invention disclosed in the above-mentioned Patent Document 3, light leakage based on the disorder of alignment due to the presence of the protrusions is prevented. For the purpose of preventing and improving the contrast, it has been shown that a light shielding film is provided at a position corresponding to the protrusion, but no consideration is given to light leakage due to the presence of the contact hole.

Therefore, the present invention makes it possible to improve the quality of display image quality in a liquid crystal display panel having a reflective portion by preventing alignment failure due to contact holes, reducing light leakage, and improving contrast. An object is to provide a liquid crystal display panel.

To solve the above problems, the invention of the liquid crystal display panel, the external light with each pixel in the thin film field effect transistor (TFT) and pixel electrodes arranged in matrix are provided with an interlayer insulation film together A first substrate in which a reflective portion is provided and the pixel electrode and the drain electrode of the TFT are electrically connected via a contact hole formed in the interlayer insulating film in the reflective portion; and each pixel electrode A MVA (multi- layer) having a second substrate having a color filter layer formed corresponding to the color filter layer and a black matrix provided at the boundary of the color filter layer, and a liquid crystal layer disposed between the first and second substrates. In a domain vertically aligned type liquid crystal display panel, the second substrate has the contact substrate in a plan view in a position facing the contact hole. Shielding film overlapping with Lumpur that are formed.

Further, in the invention of the liquid crystal display panel, wherein the contact hole is that is formed in the center of the reflective portion.
Further, in the invention of the liquid crystal display panel, the reflective portion, the auxiliary capacitance line are located.

The present invention provides the following advantageous effects by having the above-described configuration. That is, according to the present invention, since the contact hole and the light shielding film are formed so as to overlap in a plan view, light leakage from the contact hole can be blocked. For this reason,
A liquid crystal display panel having a reflective portion that can provide good contrast is obtained.

Hereinafter, the best mode for carrying out the present invention will be described more specifically with reference to examples and drawings. In addition, although the Example shown below shows the transflective liquid crystal display panel for actualizing the technical idea of this invention, it does not intend limiting this invention to what was described here. However, the present invention can be similarly applied to a liquid crystal display panel having a reflective portion such as a reflective liquid crystal display panel.

1 and 2 show a transflective liquid crystal display panel according to an embodiment. 1 is a schematic plan view showing one pixel portion of the transflective liquid crystal display panel through a color filter, and FIG. 2 is a cross-sectional view taken along the line AA of FIG.

In this MVA type transflective liquid crystal display panel 10, a plurality of scanning lines 12 and signal lines 13 are directly or inorganic insulating film 14 on a transparent glass substrate 11 of a first substrate.
Are formed in a matrix. Here, a region surrounded by the scanning line 12 and the signal line 13 corresponds to one pixel, and a TFT serving as a switching element is formed for each pixel. The surface of each pixel such as a TFT is a protective insulating film. 23.

Then, a fine uneven portion is formed on the surface of the reflecting portion 15 so as to cover the scanning line 12, the signal line 13, the inorganic insulating film 14, the protective insulating film 23, etc., and the surface of the transmitting portion 16 is flat. An interlayer film 17 made of an organic insulating film such as a formed photoresist is laminated.
In FIG. 1 and FIG. 2, the uneven portion of the reflecting portion 15 is omitted. The interlayer film 17 is provided with a contact hole 20 at a position corresponding to the drain electrode D of the TFT. In each pixel, the reflective portion 15 is made of, for example, aluminum metal on the contact hole 20 and on the surface of the interlayer film 17. A reflection plate 18 is provided, and the surface of the reflection plate 18 and the transmission portion 1 are provided.
For example, ITO (Indium Tin Oxide) to IZ (Indium Zinc Ox)
A transparent pixel electrode 19 made of ide) is formed.

Further, in the transflective liquid crystal display panel 10, the slit 33 ₁ is provided for controlling the alignment of liquid crystal molecules in the boundary area of the transmissive portion 16 and the reflective portion 15 of the pixel electrode 19, the pixel electrode 19 is substantially The pixel electrode 19a of the reflective portion 15 and the pixel electrode 19b of the transmissive portion 16 are divided, and the pixel electrode 19a of the reflective portion 15 and the pixel electrode 19b of the transmissive portion 16 are narrow portions 3.
41 Electrically connected through ₁ .

On the reflection portion 15 side, the auxiliary capacitance line 21 is disposed below the position where the reflection plate 18 of the interlayer film 17 exists, and the reflection plate 18 and the pixel electrode 19a of the reflection portion are adjacent to each other in plan view. In order to avoid contact with the reflection plate and the pixel electrode of the pixel, the scanning line 12 and the signal line 13 are not overlapped, and the reflection plate 18 and the pixel electrode 19a of the reflection portion 15 are substantially overlapped. It is provided in the same shape. Further, the pixel electrode 19b on the transmissive part 16 side is provided along the signal line 13 so as not to contact the pixel electrode and the reflection plate of the adjacent pixel and not substantially overlap with the signal line. In addition, the scanning line 12 is formed so as to slightly overlap. In this embodiment, both the end portions 35 of the portion of the pixel electrode 19b of the transmissive portion 16 that overlaps along the scanning line slightly overlap with the signal line 13, but this is done. The reason is to prevent the scanning line 12 from being exposed even if there is a mask shift or the like during the formation of the pixel electrode 19 and affecting the alignment of the liquid crystal molecules.

Further, in the transflective liquid crystal display panel 10 of this embodiment, the pixel electrode 1 of the transmissive portion 16 is used.
9b, together with the area is larger than the pixel electrode 19a of the reflective portion 15, by another slit 33 ₂ provided in the intermediate portion is divided into two regions 19b ₁ and 19b _2, the two regions 19b ₁ and 19b ₂ portions are electrically connected via the narrow portion 34 ₂ width. A vertical alignment film (not shown) is stacked on the surface of the first substrate so as to cover all the display areas, including the surface of the pixel electrode 19.

In this way, the area of the pixel electrode 19b in the transmissive part is increased and the two regions 19b
_The reason for the division into ₁ and 19b ₂ is that the transflective liquid crystal display panel for mobile phones has high definition and many image displays. This is because the number of opportunities to be used is increased and the alignment of liquid crystal molecules can be regulated over the entire pixel electrode 19b in the transmissive portion having a large area.

In addition, any one of red (R), green (G), and blue (B) formed corresponding to each pixel on the display area of the transparent glass substrate 25 of the second substrate. A striped color filter layer 26 made of one color is provided. Furthermore, the reflection part 15 and the transmission part 1
In order to use the color filter layer 26 having the same thickness as 6, a top coat layer 27 having a predetermined thickness is provided on a part of the color filter layer 26 of the reflecting portion 15. The top coat layer 27 is provided over the entire reflecting portion 15, and the thickness thereof is the thickness of the liquid crystal layer 29 in the reflecting portion 15, so that the so-called cell gap d 1 is half of the cell gap d 2 of the transmitting portion 16. That is, d1 = (d2) / 2.

Further, a part of the surface of the color filter layer 26 located in the transmissive part 16 has liquid crystal molecules located at the central part of the _two regions 19b ₁ and 19b ₂ part of the pixel electrode 19b of the transmissive part 16, respectively. with bullet-shaped projections 31 ₁ and 31 ₂ for controlling the alignment is respectively provided, the bullet-like projection 31 ₃ is provided in a position facing the contact hole 20 on the surface of the topcoat 27 of the reflection section 15 It has been. These color filter layers 26
A common electrode and a vertical alignment film (both not shown) are sequentially stacked on the surfaces of the top coat layer 27 and the protrusions 31 _{1 to} 31 ₃ .

In addition, the portion of the color filter 26 corresponding to the bottom of each of the protrusions 31 _{1 to} 31 ₃ has a light shielding film 36 _{1 to} 36 that is slightly larger than the bottom of the protrusions 31 _{1 to} 31 _{3 in} plan view.
₃ is formed. The light shielding film ₃₆ 1-36 ₃ striped color filter layer 26
Can be formed simultaneously with the same material as the black matrix 37 provided at the boundary of each color at the time of manufacture. Thus, the light-shielding film 36 _{1-36 3} without the number of steps is increased for the formation, it is possible to easily form the light shielding film. Incidentally, the light-shielding film ₃₆ 1-36 ₃ 2 The size has been shown that slightly greater than the size of the bottom of the projection ₃₁ 1-31 _3, the bottom of the projection ₃₁ 1-31 ₃ The size may be substantially the same as the size.

The size of the bottom of the protrusion 31 _third reflecting unit it is preferably greater than the size of the contact hole 20, for example, with respect to the size of the contact hole 20 of about 7 × 7 [mu] m, the width of the bottom portion of the projections 31 ₃ Is preferably about 8 μm. In the light-shielding film ₃₆₃ of the projections 31 ₃ side in this embodiment, from where the projection 31 ₃ is provided so as to overlap the contact hole 31 in plan view of the first substrate 11, the light shielding film ₃₆₃ is a contact hole 20 Both are arranged so as to overlap in plan view. Accordingly, the light shielding film 36 ₃ even if light leakage from the contact hole 20, it is to act so as not to leak out, the light shielding film ₃₆₃ is in the light leakage and the projections 36 ₃ near the contact hole 20 It is possible to block both light leakage caused by alignment defects of liquid crystal molecules.

In addition, because the bottom of the projections 31 ₁ and 31 ₂ transmitting portion light-shielding film 36 ₁ and 36 ₂ are slightly larger or projections 31 ₁ and 31 ₂ in the bottom of the magnitude and the same in a plan view,
Even if the in the vicinity of the protrusions 31 ₁ to 31 ₂ light is disturbed orientation of the liquid crystal molecules when no electric field is applied leaks, because the leaked light is blocked by the light blocking film 36 ₁ and 36 ₂ Less likely to come out. Therefore, it is possible to greatly reduce the decrease in contrast due to light leakage when no electric field is applied even in the transmission part.

Then, the first substrate and the second substrate are opposed to each other, a sealing material is provided around both substrates, the two substrates are bonded together, and a liquid crystal 29 having negative dielectric anisotropy is filled between the substrates. Thus, the MVA transflective liquid crystal display panel 10 is obtained. Note that a backlight device having a well-known light source, a light guide plate, a diffusion sheet, and the like (not shown) is disposed below the first substrate to complete the liquid crystal display device.

In the transflective liquid crystal display panel 10 of this embodiment, the example in which the bullet-shaped projections 31 _{1 to} 31 ₃ are provided as the orientation regulating members provided on the second substrate is shown, but the present invention is not limited thereto, and the orientation of the transmissive part is shown. the regulating member 31 _{1-31 2} may be one bottom of the cross-shaped in plan view as shown in FIG. Furthermore, the shape of the bottom portion may be a bar shape, a Y shape, or a shape in which a Y shape and an inverted Y shape are overlapped. FIG. 3 is a modification in which the shape of the projection of the transmission part in the embodiment is such that the bottom part has a cross shape in plan view, and the same components as those in FIGS. 1 and 2 are given the same reference numerals. Detailed description thereof will be omitted.

In the above embodiment showed the example of dividing the pixel electrode 19b of the transmissive portion 16 into two by a slit 33 ₂ may not be provided a slit 33 _2. In any case, it is only necessary to provide a light shielding film at the bottom of the projection of the transmission portion that is the same as or slightly larger than the size of the bottom of the projection in plan view.

Note that in an MVA-type transflective liquid crystal display panel, light is not transmitted through the liquid crystal layer as long as the liquid crystal molecules are vertically aligned with no electric field applied to the liquid crystal molecules. Accordingly, since the vertical alignment film to slit 33 ₁ and 33 ₂ of the portion provided on the pixel electrode 19 is provided, of the slit portion since no light passes through, the MVA mode of this embodiment semi the transmissive liquid crystal display panel 10, in order to assist capacity increases, the auxiliary capacitance line 21 are extended to further transmission portion 16 side slits 33 ₁ side from the lower portion of the reflection plate 18.

Further, in the MVA transflective liquid crystal display panel 10 of this embodiment, the transmissive portion 16
Although the example in which the pixel electrode 19b on the side is provided along the signal line 13 so as not to substantially overlap with the signal line 13 is shown, the pixel electrode 19b on the transmissive part 16 side is accurately along the signal line 13. Since it is technically difficult to provide, a slight gap may be formed between the pixel electrode 19b on the transmissive part side and the scanning line 13, and on the contrary, the pixel electrode 19b on the excessive part side is slightly scanned. The line 13 may be overlapped. Even if a slight gap is formed between the pixel electrode 19b on the transmissive part side and the scanning line 13, since the vertical alignment film is provided in the gap part, light does not leak from the gap part. .

FIG. 4 is a schematic plan view showing one pixel portion of a transflective liquid crystal display panel according to an embodiment as seen through a color filter. It is sectional drawing along the AA line of FIG. It is a schematic plan view corresponding to FIG. 1 of the modification of an Example. It is a top view for one pixel of the liquid crystal display panel of the MVA system of a prior art example. It is sectional drawing along the BB line of FIG. It is a top view for one pixel of the liquid crystal display panel of another MVA system of a prior art example. It is sectional drawing along CC line of FIG. FIG. 8 is an enlarged view conceptually showing a state in which liquid crystal molecules are inclined at the contact hole portion of FIG.

Explanation of symbols

10, 50, 70 MVA transflective liquid crystal display panel 11, 25 Glass substrate 12 Scan line 13 Signal line 14 Inorganic insulating film 15 Reflecting part 16 Transmitting part 17 Interlayer film 18 Reflecting plates 19, 19a, 19b, 19b ₁ 19b ₂ pixel electrode 20 Contact hole 21 Auxiliary capacitance line 26 Color filter layer 27 Top coat layer 29 Liquid crystal 31 _{1 to} 31 ₃ Projection 33 ₁ , 33 ₂ Slit 34 ₁ , 34 ₂ Narrow portion 36 _{1 to} 36 _{3 of} pixel electrode Shading member 37 Black matrix

Claims (3)

Each pixel arranged in a matrix is provided with a thin film field-effect transistor (TFT) and a pixel electrode through an interlayer insulating film and a reflection part for reflecting external light, and the interlayer insulation in the reflection part is provided. A first substrate in which the pixel electrode and the drain electrode of the TFT are electrically connected via a contact hole formed in the film;
A second substrate having a color filter layer formed corresponding to each pixel electrode and a black matrix provided at a boundary of the color filter layer;
In an MVA (Multi-domain vertically aligned) type liquid crystal display panel having a liquid crystal layer disposed between the first and second substrates,
On the second substrate, a light shielding film that overlaps the contact hole in a plan view is formed at a position facing the contact hole.
Liquid crystal display panel. The contact hole is formed at the center of the reflecting portion.
The liquid crystal display panel according to 請 Motomeko 1. An auxiliary capacitance line is disposed in the reflecting portion.
The liquid crystal display panel according to 請 Motomeko 1.

Images