KR20070064768A - Liquid crystal display and panel therefor - Google Patents

Abstract

An LCD(Liquid Crystal Display) and a display substrate for the same are provided to improve the reflectance of a reflecting electrode, by forming the reflecting electrode to have an irregular concave and convex structure. A gate line crosses a data line(171) above a substrate(110). A thin film transistor is connected to the gate line and the data line. A pixel electrode(191) is connected to the thin film transistor, wherein the pixel electrode has a transparent electrode(192) and a reflecting electrode(194). A surface of the reflecting electrode has an irregular concave and convex structure. A passivation layer(180) is formed between the thin film transistor and the pixel electrode. A surface of the passivation layer has an irregular concave and convex structure.

Description

Liquid crystal display and display panel therefor {LIQUID CRYSTAL DISPLAY AND PANEL THEREFOR}

1 is a layout view of a liquid crystal display according to an exemplary embodiment of the present invention.

2 and 3 are cross-sectional views of the liquid crystal display shown in FIG. 1 taken along the lines II-II and III-III, respectively.

4 is a graph showing the results of measuring the uneven structure of the reflective electrode according to the embodiment of the present invention with an atomic force microscope.

5 is a layout view of a liquid crystal display according to another exemplary embodiment of the present invention.

6 and 7 are cross-sectional views of the liquid crystal display shown in FIG. 5 taken along the VI-VI line and the VIII-VIII line, respectively.

The present invention relates to a liquid crystal display device and a display panel for the same.

In general, a liquid crystal display device includes a liquid crystal layer positioned between a field generating electrode and a pair of display panels provided with a polarizing plate. The field generating electrode generates an electric field in the liquid crystal layer and the arrangement of the liquid crystal molecules changes as the intensity of the electric field changes. For example, in the state where an electric field is applied, the liquid crystal molecules of the liquid crystal layer change its arrangement to change the polarization of light passing through the liquid crystal layer. The polarizer displays a desired image by appropriately blocking or transmitting polarized light to create bright and dark areas.

Since the liquid crystal display is a light-receiving display device that does not emit light by itself, light from a lamp of a separately provided backlight unit passes through the liquid crystal layer, or light from external sources such as natural light passes through the liquid crystal layer once again. Reflects and passes the liquid crystal layer again. The former case is called a transmissive liquid crystal display device, and the latter case is called a reflective liquid crystal display device. The latter case is mainly used for small and medium size display devices. In addition, a semi-transmissive or reflective-transmissive liquid crystal display device using either a backlight device or an external light is developed according to the environment, and is mainly applied to a small and medium display device.

In the case of a reflective liquid crystal display device or a transflective liquid crystal display device, a reflective electrode is formed in each pixel.

The reflective electrode formed in the reflective region of the transflective liquid crystal display device or formed in the reflective liquid crystal display device has an uneven structure for high reflectance.

In general, the concave-convex structure of the reflective electrode is a form in which concave portions and convex portions of a certain form are repeated at equal intervals.

However, when the reflective electrode has a concave-convex structure repeated in a constant shape, the light reflected from the same concave-convex structure having a predetermined interval periodically overlaps each other, thereby causing a moir phenomenon in which an interference fringe occurs. Cause.

By the moiré phenomenon, the reflected light cancels each other or an interference fringe is generated at regular intervals, thereby lowering the overall reflectance and causing defects on the screen of the liquid crystal display.

Accordingly, an aspect of the present invention is to provide a liquid crystal display device in which a moiré phenomenon does not occur.

According to an embodiment of the present invention, a display panel for a liquid crystal display device includes a substrate and a reflective electrode formed on the substrate, and the reflective electrode has an irregular concave-convex structure.

The liquid crystal display panel further includes a gate line and a data line formed on the substrate, a thin film transistor connected to the gate line and the data line, and a passivation layer formed on the substrate. The protective layer may be formed on the passivation layer, and may be connected to the thin film transistor. An irregular concave-convex structure may be formed on a surface of the passivation layer.

A liquid crystal display according to an exemplary embodiment of the present invention is formed on a first substrate, a gate line and a data line formed on the first substrate, a thin film transistor connected to the gate line and the data line, and formed on the first substrate. An upper passivation layer and a lower passivation layer, the pixel electrode being connected to the thin film transistor and formed on the upper passivation layer and having a transparent electrode and a reflective electrode, a second substrate facing the first substrate, and formed on the second substrate. And a liquid crystal layer interposed between the first filter and the second substrate, wherein the upper passivation layer and the reflective electrode may have an irregular concave-convex structure.

The reflective electrode may be formed on a portion of the transparent electrode.

The upper passivation layer may include an opening that exposes a portion of the lower passivation layer.

The liquid crystal display may further include a light blocking member formed on the second substrate.

The liquid crystal display may further include an overcoat formed on the color filter.

The liquid crystal display may further include a common electrode formed on the overcoat.

DETAILED DESCRIPTION Embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Like parts are designated by like reference numerals throughout the specification. When a part of a layer, film, area, plate, etc. is said to be "on" another part, this includes not only the other part being "right over" but also another part in the middle. On the contrary, when a part is "just above" another part, there is no other part in the middle.

A liquid crystal display according to an exemplary embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

1 is a layout view of a liquid crystal display according to an exemplary embodiment of the present invention, and FIGS. 2 and 3 are cross-sectional views of the liquid crystal display shown in FIG. 1 taken along lines II-II and III-III, respectively. .

The liquid crystal display according to the exemplary embodiment of the present invention includes a thin film transistor array panel 100 and a common electrode panel 200 facing each other, and a liquid crystal layer 3 interposed between the two display panels 100 and 200.

First, the thin film transistor array panel 100 will be described.

A plurality of gate lines 121 and a plurality of storage electrode lines 131 are formed on an insulating substrate 110 made of transparent glass or plastic.

The gate line 121 transmits a gate signal and mainly extends in a horizontal direction. Each gate line 121 includes a plurality of gate electrodes 124 protruding upward and end portions 129 having a large area for connection with another layer or an external driving circuit. A gate driving circuit (not shown) for generating a gate signal may be mounted on a flexible printed circuit film (not shown) attached to the substrate 110 or directly mounted on the substrate 110, It may be integrated into the substrate 110. When the gate driving circuit is integrated on the substrate 110, the gate line 121 may extend to be directly connected to the gate driving circuit.

The storage electrode line 131 receives a predetermined voltage and almost extends in parallel with the gate line 121. Each storage electrode line 131 is positioned between two adjacent gate lines 121 and is close to a lower side of the two gate lines 121. The storage electrode line 131 includes a storage electrode 133 extending up and down. However, the shape and arrangement of the storage electrode line 131 may be modified in various ways.

The gate line 121 and the storage electrode line 131 may be formed of aluminum-based metal such as aluminum (Al) or aluminum alloy, silver-based metal such as silver (Ag) or silver alloy, copper-based metal such as copper (Cu) or copper alloy, or molybdenum ( It may be made of molybdenum-based metals such as Mo) or molybdenum alloy, chromium (Cr), tantalum (Ta) and titanium (Ti). However, they may have a multilayer structure including two conductive films (not shown) having different physical properties. One of the conductive films is made of a metal having low resistivity, such as aluminum-based metal, silver-based metal, or copper-based metal, so as to reduce signal delay or voltage drop. In contrast, other conductive films are made of other materials, particularly materials having excellent physical, chemical, and electrical contact properties with indium tin oxide (ITO) and indium zinc oxide (IZO), such as molybdenum-based metals, chromium, tantalum, and titanium. Good examples of such a combination include a chromium bottom film, an aluminum (alloy) top film, and an aluminum (alloy) bottom film and a molybdenum (alloy) top film. However, the gate line 121 and the storage electrode line 131 may be made of various other metals or conductors.

Side surfaces of the gate line 121 and the storage electrode line 131 are inclined with respect to the surface of the substrate 110, and the inclination angle is preferably about 30 ° to about 80 °.

A gate insulating layer 140 made of silicon nitride (SiNx) or silicon oxide (SiOx) is formed on the gate line 121 and the storage electrode line 131.

A plurality of linear semiconductors 151 made of hydrogenated amorphous silicon (hereinafter referred to as a-Si) or polysilicon are formed on the gate insulating layer 140. The linear semiconductor 151 mainly extends in the longitudinal direction and includes a plurality of projections 154 extending toward the gate electrode 124, and the plurality of expansion portions 157 extend from the protrusions 154. have. The linear semiconductor 151 has a wider width in the vicinity of the gate line 121 and the storage electrode line 131 and covers them widely.

A plurality of linear and islands of ohmic contacts 161, 163, and 165 are formed on the semiconductor 151. The ohmic contacts 161, 163, and 165 may be made of a material such as n + hydrogenated amorphous silicon in which n-type impurities such as phosphorus are heavily doped, or may be made of silicide. The linear ohmic contact 161 has a plurality of protrusions 163, and the protrusion 163 and the island-type ohmic contact 165 are paired and disposed on the protrusion 154 of the semiconductor 151.

Side surfaces of the semiconductors 151, 154, and 157 and the ohmic contacts 161, 163, and 165 are also inclined with respect to the surface of the substrate 110, and the inclination angle is about 30 ° to 80 °.

A plurality of data lines 171 and a plurality of drain electrodes 175 are formed on the ohmic contacts 161, 163, and 165 and the gate insulating layer 140.

The data line 171 transmits a data signal and mainly extends in the vertical direction to cross the gate line 121 and the storage electrode line 131. Each data line 171 has a wide end portion 179 for connection between a plurality of J-shaped source electrodes 173 extending toward the gate electrode 124 and another layer or an external driving circuit. It includes. A data driving circuit (not shown) for generating a data signal is mounted on a flexible printed circuit film (not shown) attached to the substrate 110, directly mounted on the substrate 110, or integrated in the substrate 110. Can be. When the data driving circuit is integrated on the substrate 110, the data line 171 may be extended to be directly connected to the data driving circuit.

The drain electrode 175 is separated from the data line 171 and faces the source electrode 173 around the gate electrode 124. Each drain electrode 175 includes one wide end and the other end having a rod shape. The wide end overlaps the sustain electrode 133, and the rod-shaped end is partially surrounded by the source electrode 173.

One gate electrode 124, one source electrode 173, and one drain electrode 175 together with the protrusion 154 of the semiconductor 151 form one thin film transistor (TFT). A channel of the transistor is formed in the protrusion 154 between the source electrode 173 and the drain electrode 175.

The data line 171 and the drain electrode 175 are preferably made of a refractory metal such as molybdenum, chromium, tantalum, and titanium, or an alloy thereof, and include a refractory metal film (not shown) and a low resistance conductive film. It may have a multilayer structure including (not shown). Examples of the multilayer structure include a double layer of chromium or molybdenum (alloy) lower layer and an aluminum (alloy) upper layer, and a triple layer of molybdenum (alloy) lower layer and aluminum (alloy) interlayer and molybdenum (alloy) upper layer. However, the data line 171 and the drain electrode 175 may be made of various metals or conductors.

The side of the data line 171 and the drain electrode 175 may also be inclined at an inclination angle of about 30 ° to about 80 ° with respect to the surface of the substrate 110.

The ohmic contacts 161, 163, and 165 exist only between the semiconductor 151 below and the data line 171 and the drain electrode 175 thereon, thereby lowering the contact resistance therebetween. Although the linear semiconductor 151 is narrower than the data line 171 in most places, as described above, the width of the linear semiconductor 151 is widened at the portion where it meets the gate line 121 to smooth the profile of the surface, thereby disconnecting the data line 171. prevent. The semiconductor 151 has an exposed portion between the source electrode 173 and the drain electrode 175, and not covered by the data line 171 and the drain electrode 175.

A passivation layer 180 is formed on the data line 171, the drain electrode 175, and the exposed semiconductor 154. The passivation layer 180 includes a lower layer 180p made of an inorganic insulator such as silicon nitride or silicon oxide and an upper layer 180q made of an organic insulator. The upper passivation layer 180q preferably has a dielectric constant of 4.0 or less, may have photosensitivity, and irregular irregularities are formed on the surface thereof. In addition, an opening that exposes a portion of the lower passivation layer 180p is formed in the upper passivation layer 180q. However, the passivation layer 180 may have a single layer structure made of an inorganic insulator or an organic insulator.

In the passivation layer 180, a plurality of contact holes 182 and 185 exposing the end portion 179 and the drain electrode 175 of the data line 171 are formed, respectively, and the passivation layer 180 and the gate insulating layer are formed. A plurality of contact holes 181 exposing the end portion 129 of the gate line 121 are formed at 140.

A plurality of pixel electrodes 191 and a plurality of contact assistants 81 and 82 are formed on the passivation layer 180.

Each pixel electrode 191 is irregularly curved along the unevenness of the upper passivation layer 180q, and includes a transparent electrode 192 and a reflective electrode 194 thereon. The transparent electrode 192 is made of a transparent conductive material such as ITO or IZO, and the reflective electrode 194 is made of a reflective metal such as aluminum, silver, chromium or an alloy thereof. However, the reflective electrode 194 has a low resistance reflective upper film (not shown) such as aluminum, silver, or an alloy thereof, and a lower film (not shown) having good contact properties with ITO or IZO such as molybdenum-based metal, chromium, tantalum, and titanium. ) May have a double membrane structure.

The reflective electrode 194 exists only on a portion of the transparent electrode 192 to expose another portion of the transparent electrode 192, and the exposed portion of the transparent electrode 192 may be formed in the opening 195 of the upper passivation layer 180q. Located.

The pixel electrode 191 is physically and electrically connected to the drain electrode 175 through the contact hole 185 and receives a data voltage from the drain electrode 175. The pixel electrode 191 to which the data voltage is applied is formed between the two electrodes 191 and 270 by generating an electric field together with the common electrode 270 of the common electrode display panel 200 to which the common voltage is applied. The direction of the liquid crystal molecules of the liquid crystal layer 3 is determined. The polarization of light passing through the liquid crystal layer 3 varies according to the direction of the liquid crystal molecules determined as described above. The pixel electrode 191 and the common electrode 270 form a capacitor (hereinafter, referred to as a "liquid crystal capacitor") to maintain an applied voltage even after the thin film transistor is turned off.

The transflective liquid crystal display device including the thin film transistor array panel 100, the common electrode display panel 200, the liquid crystal layer 3, and the like is a transmissive area TA defined by the transparent electrode 192 and the reflective electrode 194, respectively. And a reflection area RA. Specifically, the portion located above and below the transmission window 195 becomes the transmission area TA.

In the transmissive area TA, light is incident on the back side of the liquid crystal display, that is, the thin film transistor array panel 100, passes through the liquid crystal layer 3 and exits the front side, that is, toward the common electrode display panel 200. In the reflective area RA, the light enters the liquid crystal layer 3, enters the liquid crystal layer 3, is reflected by the reflective electrode 194, passes through the liquid crystal layer 3, and exits to the front surface. In this case, irregular bending of the reflective electrode 194 may induce diffused reflection of light to prevent the object from being reflected on the screen.

Since there is no upper passivation layer 180q in the transmission area TA, the thickness of the liquid crystal layer 3 or the cell gap in the transmission area TA is greater than the cell gap in the reflection area RA. In particular, it is preferable that the cell spacing in the transmission area TA is twice the cell spacing in the reflection area RA.

The pixel electrode 191 and the drain electrode 175 electrically connected thereto overlap the storage electrode line 131. A capacitor in which the pixel electrode 191 and the drain electrode 175 electrically connected thereto overlap with the storage electrode line 131 is called a "storage capacitor", and the storage capacitor enhances the voltage holding capability of the liquid crystal capacitor. .

The contact auxiliary members 81 and 82 are connected to the end portion 129 of the gate line 121 and the end portion 179 of the data line 171 through the contact holes 181 and 182, respectively. The contact auxiliary members 81 and 82 compensate for and protect the adhesion between the end portion 129 of the gate line 121 and the end portion 179 of the data line 171 and the external device.

Next, the common electrode display panel 200 will be described.

A light blocking member 220 is formed on a substrate 210 made of an insulating material such as transparent glass or plastic. The light blocking member 220 is also referred to as a black matrix and defines a plurality of opening regions facing the pixel electrode 191 while preventing light leakage between the pixel electrodes 191.

A plurality of color filters 230 are also formed on the substrate 210 and are arranged to almost fit into the opening region surrounded by the light blocking member 220. The color filter 230 may extend in the vertical direction along the pixel electrode 191 to form a stripe. Each color filter 230 may display one of primary colors such as three primary colors of red, green, and blue.

The average thickness of the color filter 230 of the reflection area RA is preferably about 1/2 of the average thickness of the color filter 230 of the transmission area TA. The color tone of each passing light may be constant.

An overcoat 250 is formed on the color filter 230 and the light blocking member 220. The overcoat 250 may be made of an (organic) insulator, protects the color filter 230, prevents the color filter 230 from being exposed, and provides a flat surface.

In the present exemplary embodiment, the cell gap between the reflection area RA and the transmission area TA is adjusted by forming the transmission window 195, but is disposed in the reflection area RA of the color filter display panel 200 of the liquid crystal display device. The cell gap may be adjusted by forming the overcoat 250 thicker than the overcoat 250 disposed in the transmission area TA.

The common electrode 270 is formed on the overcoat 250. The common electrode 270 is preferably made of a transparent conductive conductor such as ITO or IZO.

An alignment layer (not shown) for aligning the liquid crystal layer 3 is coated on the inner surfaces of the display panels 100 and 200, and one or more polarizers are disposed on the outer surfaces of the display panels 100 and 200. (Not shown) is provided.

The liquid crystal layer 3 is vertically or horizontally aligned.

The liquid crystal display further includes a plurality of elastic spacers (not shown) that hold the thin film transistor array panel 100 and the common electrode display panel 200 to form a gap therebetween.

The liquid crystal display may further include a sealant (not shown) for coupling the thin film transistor array panel 100 and the common electrode panel 200. The sealing material is positioned at the edge of the common electrode display panel 200.

Next, the uneven structure of the reflective electrode 194 according to the exemplary embodiment of the present invention will be described with reference to FIG. 4. 4 is a graph illustrating a result of measuring an uneven structure of a reflective electrode according to an exemplary embodiment of the present invention with an atomic force microscope.

Referring to FIG. 4, the uneven structure of the reflective electrode 194 is irregular. As such, the reflective electrode 194 has an irregular concave-convex structure, thereby inducing diffuse reflection of light reflected from the reflective electrode 194, thereby preventing the object from being reflected on the screen, and the light reflected from the regularly repeated structure The moiré phenomenon in which interference fringes are generated by periodically overlapping each other can be prevented.

Therefore, the liquid crystal display according to the exemplary embodiment of the present invention can prevent screen defects of the liquid crystal display due to the moiré phenomenon and the reflected light cancels each other, compared to the liquid crystal display device in which the reflective electrode 194 has a constant uneven structure. It is possible to increase the reflectance of light at the reflective electrode 194 of the liquid crystal display device.

Next, a liquid crystal display according to another exemplary embodiment of the present invention will be described in detail with reference to FIGS. 5 to 7. 5 is a layout view of a liquid crystal display according to another exemplary embodiment, and FIGS. 6 and 7 are cross-sectional views of the liquid crystal display shown in FIG. 5 taken along a line VI-VI and VIII-VIII, respectively. to be.

The liquid crystal display according to the present exemplary embodiment also includes a thin film transistor array panel 100, a common electrode display panel 200, and a liquid crystal layer 3 interposed between the two display panels 100 and 200.

The layered structure of the display panels 100 and 200 according to the present exemplary embodiment is substantially the same as those of FIGS. 1 to 3.

Referring to the thin film transistor array panel 100, a plurality of gate lines 121 including the gate electrode 124 and a plurality of storage electrode lines 131 are formed on the substrate 110, and the gate insulating layer 140 is formed thereon. , A plurality of linear semiconductors 151 including protrusions 154, a plurality of linear ohmic contact members 161 including protrusions 163, and a plurality of island-type ohmic contact members 165 are sequentially formed. A plurality of data lines 171 including a source electrode 173 and a plurality of drain electrodes 175 are formed on the ohmic contacts 161, 163, and 165, and a passivation layer 180 is formed thereon. The passivation layer 180 has a double layer structure having a lower layer 180p and an upper layer 180q, and an irregular concave-convex structure is formed on the upper passivation layer 180q.

A plurality of contact holes 181, 182, and 185 are formed in the passivation layer 180 and the gate insulating layer 140, and a plurality of reflective electrodes 194 and a plurality of contact auxiliary members 81 and 82 are formed thereon. have.

The reflective electrode 194 is physically and electrically connected to the drain electrode 175 through the contact hole 185 and receives a data voltage from the drain electrode 175. The reflective electrode 194 to which the data voltage is applied is generated between the two electrodes 194 and 270 by generating an electric field together with the common electrode 270 of the common electrode display panel 200 to which the common voltage is applied. The direction of the liquid crystal molecules of the liquid crystal layer 3 is determined. The polarization of light passing through the liquid crystal layer 3 varies according to the direction of the liquid crystal molecules determined as described above. The reflective electrode 194 and the common electrode 270 form a capacitor (hereinafter referred to as a "liquid crystal capacitor") to maintain an applied voltage even after the thin film transistor is turned off.

The reflective electrode 194 of the liquid crystal display according to the present embodiment is made of a reflective metal such as aluminum, silver, chromium, or an alloy thereof. However, the reflective electrode 194 has a double-layered structure of a low-resistance reflective upper film (not shown) such as aluminum, silver, or an alloy thereof and a transparent conductive lower film (not shown) such as ITO or IZO, or aluminum or silver. Low-resistance reflective top film (not shown) such as or an alloy thereof, transparent conductive bottom film (not shown) such as ITO or IZO, and intermediate film having good contact properties with ITO or IZO such as molybdenum-based metal, chromium, tantalum and titanium It may have a triple film structure (not shown).

The reflective electrode 194 and the drain electrode 175 electrically connected thereto overlap the storage electrode line 131. A capacitor in which the pixel electrode 194 and the drain electrode 175 electrically connected thereto overlap the storage electrode line 131 is called a "storage capacitor", and the storage capacitor enhances the voltage holding capability of the liquid crystal capacitor. .

Referring to the common electrode display panel 200, the light blocking member 220, the plurality of color filters 230, and the common electrode 270 are formed on the insulating substrate 210.

However, unlike the liquid crystal display shown in FIGS. 1 to 3, there is no opening exposing a part of the lower passivation layer 180p and the thickness of the color filter 230 is formed to be constant.

In the upper passivation layer 180q and the reflective electrode 194 of the liquid crystal display according to the present exemplary embodiment, irregular irregularities are formed on the upper protective layer 180q and the reflective electrode 194 as described above, thereby inducing diffused reflection of light from the reflective electrode 194. It is possible to prevent the moiré phenomenon on the screen of the liquid crystal display and increase the reflectance of light.

According to the present invention, the protective film and the reflective electrode of the liquid crystal display device have an irregular concave-convex structure, so that light can be diffused by the reflective electrode efficiently, and the moiré phenomenon occurring on the screen of the liquid crystal display device can be prevented. The reflectance of the light at the reflective electrode can be improved.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (9)

Board, A gate line and a data line formed on the substrate; A thin film transistor connected to the gate line and the data line, and A pixel electrode connected to the thin film transistor and having a transparent electrode and a reflective electrode, The reflective electrode is a display panel for a liquid crystal display device having an irregular concave-convex structure is formed on the surface. In claim 1, A protective film formed between the thin film transistor and the pixel electrode, Display panel for a liquid crystal display device having an irregular concave-convex structure is formed on the surface of the protective film. In claim 1, An upper passivation layer and a lower passivation layer formed between the thin film transistor and the pixel electrode; Display panel for a liquid crystal display device having an irregular concave-convex structure is formed on the surface of the upper protective film. First substrate, A gate line and a data line formed on the first substrate; A thin film transistor connected to the gate line and the data line, An upper passivation layer and a lower passivation layer formed on the first substrate; A pixel electrode connected to the thin film transistor, the pixel electrode having a transparent electrode and a reflective electrode formed on the upper passivation layer; A second substrate facing the first substrate, A color filter formed on the second substrate, and A liquid crystal layer interposed between the first substrate and the second substrate, The upper passivation layer and the reflective electrode have an irregular concave-convex structure. In claim 4, The reflective electrode is formed on a portion of the transparent electrode. In claim 4, The upper passivation layer includes an opening that exposes a portion of the lower passivation layer. In claim 4, And a light blocking member formed on the second substrate. In claim 4, A liquid crystal display further comprising an overcoat formed on the color filter. In claim 8, And a common electrode formed on the overcoat.

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