JP2010266542A - Liquid crystal display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device improving display quality and reliability. <P>SOLUTION: The liquid crystal display device is provided with: a first color filter 32G arranged in a first pixel having a first reflection part and a first transmission part; a first opening part OP1 formed on the first color filter layer of the first reflection part; a second color filter layer 32B arranged in a second pixel having a second reflection part and a second transmission part; a second opening part OP2 formed in the second color filter layer of the second reflection part and smaller than the first opening part; an overcoat layer arranged on the first or the second color filter layer and the first or second opening part; a resin layer 34 arranged on the overcoat layer of the first reflection part and the second reflection part and having an edge formed outside the position direct on the edge of the first opening part; and an counter electrode ET arranged on the overcoat layer and the resin layer. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device, for example, a transflective liquid crystal display device having a reflective portion and a transmissive portion in each pixel.

  Liquid crystal display devices are utilized in various fields as display devices for OA equipment such as personal computers and televisions, taking advantage of features such as light weight, thinness, and low power consumption. In recent years, liquid crystal display devices are also used as mobile terminal devices such as mobile phones, display devices such as car navigation devices and game machines.

  In a transflective liquid crystal display device, when used as a reflective type, light passes through a color filter twice, so that an improvement in reflectance and a reduction in color purity are required. For example, according to Patent Documents 1 and 2, a technique is disclosed in which an opening (or a non-formed portion without a color filter) is provided in a part of a color filter.

JP 2002-341366 A Japanese Patent Application Laid-Open No. 2005-283553

  An object of the present invention is to provide a liquid crystal display device capable of improving display quality and reliability.

According to one aspect of the invention,
A first color filter layer disposed in a first pixel having a first reflection part and a first transmission part arranged in a first direction, and a first opening formed in the first color filter layer of the first reflection part And a second reflecting portion arranged in a second direction orthogonal to the first direction of the first reflecting portion of the first pixel and arranged in the second direction of the first transmitting portion of the first pixel A second color filter layer disposed in a second pixel having a second transmission part; a second opening part formed in the second color filter layer of the second reflection part and smaller than the first opening part; An overcoat layer disposed on the first to second color filter layers and the first to second openings; and the first reflective portion and the second reflective portion extending in a second direction. Arranged on the overcoat layer, from directly above the edge of the first opening A resin layer edges are formed on the outer side, and a counter electrode disposed on the overcoat layer and the resin layer, a liquid crystal display device characterized by comprising a are provided.

Or
A first pixel electrode having a first reflective electrode and a first transmissive electrode arranged in a first direction, and a second reflection arranged in a second direction orthogonal to the first direction of the first reflective electrode of the first pixel electrode A first substrate having a second pixel electrode having an electrode; a first color filter layer facing the first pixel electrode; and a portion of the first color filter layer facing the first reflective electrode. A first opening, a second color filter layer facing the second pixel electrode, and a second opening smaller than the first opening formed in a part of the second color filter layer facing the second reflective electrode. An overcoat layer disposed on the first and second color filter layers and the first and second openings, and facing the first reflective electrode on the overcoat layer. Extends in two directions A resin layer facing the second reflective electrode and having an edge formed on the outer side of the edge of the first opening, and a counter electrode disposed on the overcoat layer and the resin layer. There is provided a liquid crystal display device comprising: a second substrate; and a liquid crystal layer held between the array substrate and the counter substrate.

According to another aspect of the invention,
A first color filter layer disposed in a first pixel having a first reflection part and a first transmission part arranged in a first direction, and a first opening formed in the first color filter layer of the first reflection part And a second reflecting portion arranged in a second direction orthogonal to the first direction of the first reflecting portion of the first pixel and arranged in the second direction of the first transmitting portion of the first pixel A second color filter layer disposed in a second pixel having a second transmission part; a second opening formed in the second color filter layer of the second reflection part and larger than the first opening; Arranged in a third pixel having a third reflecting portion arranged in the second direction of the second reflecting portion of two pixels and having a third transmitting portion arranged in the second direction of the second transmitting portion of the second pixel. The third color filter layer and the third color filter layer of the third reflecting portion. A third opening smaller than the second opening, an overcoat layer disposed on the first to third color filter layers and the first to third openings, and in a second direction. A resin layer that extends and is disposed on the overcoat layer of the first to third reflective portions; and a counter electrode that is disposed on the overcoat layer and the resin layer. A liquid crystal display device is provided.

Or
A first pixel electrode having a first reflective electrode and a first transmissive electrode arranged in a first direction, and a second reflection arranged in a second direction orthogonal to the first direction of the first reflective electrode of the first pixel electrode A first substrate comprising: a second pixel electrode having an electrode; and a third pixel electrode having a third reflective electrode arranged in a second direction of the second reflective electrode of the second pixel electrode; A first color filter layer facing the pixel electrode; a first opening formed in a part of the first color filter layer facing the first reflective electrode; a second color filter layer facing the second pixel electrode; A second opening that is formed in a part of the second color filter layer facing the second reflective electrode and is larger than the first opening, a third color filter layer facing the third pixel electrode, and the third color filter layer. The third reflection of the color filter layer A third opening smaller than the second opening formed in a part facing the pole, the first to third color filter layers, and an overcoat layer disposed on the first to third openings A resin layer facing the first to third reflective electrodes on the overcoat layer and extending in the second direction; a counter electrode disposed on the overcoat layer and the resin layer; There is provided a liquid crystal display device comprising: a second substrate provided; and a liquid crystal layer held between the array substrate and the counter substrate.

  According to the present invention, a liquid crystal display device capable of improving display quality and reliability can be provided.

FIG. 1 schematically shows a configuration of a liquid crystal display device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing the structure of the liquid crystal display device shown in FIG. FIG. 3 is a plan view schematically showing the structure of an array substrate applicable to the liquid crystal display device shown in FIG. FIG. 4 is a plan view schematically showing the structure of the counter substrate that can be overlaid on the array substrate shown in FIG. FIG. 5 is a plan view schematically showing the structure of the counter substrate of the first embodiment that can be overlaid on the array substrate shown in FIG. FIG. 6 is a plan view schematically showing the structure of the counter substrate in Modification 1 of the first embodiment. FIG. 7 is a plan view schematically showing the structure of the counter substrate in Modification 2 of the first embodiment. FIG. 8 is a plan view schematically showing the structure of the counter substrate in Modification 3 of the first embodiment. FIG. 9 is a plan view schematically showing the structure of the counter substrate in Modification 4 of the first embodiment. FIG. 10 is a plan view schematically showing the structure of the counter substrate of the second embodiment that can be superimposed on the array substrate shown in FIG.

  A liquid crystal display device according to an embodiment of the present invention will be described below with reference to the drawings. Here, a transflective liquid crystal display in which each pixel has a transmissive portion that selectively transmits light from the backlight and displays an image, and a reflective portion that selectively reflects external light and displays an image. The apparatus will be described as an example.

  As shown in FIG. 1, the liquid crystal display device is an active matrix type liquid crystal display device and includes a liquid crystal display panel LPN. The liquid crystal display panel LPN includes a pair of substrates, that is, an array substrate AR as a first substrate, and a counter substrate CT as a second substrate disposed so as to face the array substrate AR. The array substrate AR and the counter substrate CT are bonded together by a seal material SE. The liquid crystal display panel LPN includes a liquid crystal layer LQ held between the array substrate AR and the counter substrate CT.

  Such a liquid crystal display panel LPN includes a display area for displaying an image, that is, an active area DSP. The active area DSP is surrounded by a seal material SE and is composed of a plurality of pixels PX arranged in a matrix of m × n (where m and n are positive integers).

  In the active area DSP, the array substrate AR extends in the column direction V so as to intersect with the n gate lines Y (Y1 to Yn) respectively extending along the row direction H and the gate lines Y. The m source lines X (X1 to Xm) and m × n switching elements W arranged in the region including the intersection of the gate line Y and the source line X in each pixel PX are arranged in each pixel PX. Each pixel includes m × n pixel electrodes EP connected to the switching element W.

  The array substrate AR includes a storage capacitor element CS in each pixel PX. The storage capacitor element CS has an auxiliary capacitance line AY and an auxiliary capacitance electrode AE that faces the auxiliary capacitance line AY.

  The gate lines Y and the auxiliary capacitance lines AY are alternately arranged in the active area DSP. That is, the n auxiliary capacitance lines AY extend along the row direction H and are arranged substantially parallel to the gate lines Y. These gate lines Y and storage capacitor lines AY are substantially orthogonal to the source lines X. Such gate lines Y, storage capacitor lines AY, and source lines X are formed of a low-resistance conductive material such as aluminum, molybdenum, tungsten, or titanium.

  Each switching element W is configured by, for example, an n-channel thin film transistor (TFT). The gate electrode WG of the switching element W is electrically connected to the gate line Y (or the gate electrode WG is formed integrally with the gate line Y). The source electrode WS of the switching element W is electrically connected to the source line X (or the source electrode WS is formed integrally with the source line X). The drain electrode WD of the switching element W is electrically connected to the pixel electrode EP.

  Each of the n gate lines Y is drawn to the outside of the active area DSP and is connected to the gate driver YD. The gate driver YD sequentially supplies scanning signals (drive signals) to the n gate lines Y based on control by the controller CNT. In addition, m source lines X are respectively drawn outside the active area DSP and connected to the source driver XD. The source driver XD supplies a video signal (drive signal) to the m source lines X based on control by the controller CNT.

  On the other hand, the counter substrate CT includes a counter electrode ET and the like in the active area DSP. The counter electrode ET is common to the plurality of pixels PX. That is, the counter electrode ET faces the pixel electrode EP of each pixel PX, and is electrically connected to the common terminal COM having a common potential outside the active area DSP.

  The structure of the liquid crystal display panel LPN will be described in detail below.

  As shown in FIG. 2, the array substrate AR of the liquid crystal display panel LPN is formed by using an insulating substrate 10 having a light transmission property such as a glass plate or a quartz plate. The array substrate AR includes a switching element W, a pixel electrode EP, and the like on the first surface 10A of the insulating substrate 10, that is, the side facing the counter substrate CT.

  The switching element W is a top gate type TFT and includes a semiconductor layer 12 disposed on the insulating substrate 10. The semiconductor layer 12 can be formed of, for example, polysilicon or amorphous silicon, and is formed of polysilicon here. The semiconductor layer 12 has a source region 12S and a drain region 12D on both sides of the channel region 12C.

  An undercoat layer that is an insulating film may be interposed between the insulating substrate 10 and the semiconductor layer 12. Such an undercoat layer is formed of an inorganic material such as silicon oxide and silicon nitride, for example.

  The semiconductor layer 12 is covered with a gate insulating film 14 that is a first insulating film. The gate insulating film 14 is also disposed on the insulating substrate 10. The gate insulating film 14 is made of an inorganic material such as silicon oxide and silicon nitride, for example.

  The gate electrode WG of the switching element W is disposed on the gate insulating film 14 and is located immediately above the channel region 12 </ b> C of the semiconductor layer 12. For example, the gate electrode WG is integrally formed with the gate line Y disposed on the gate insulating film 14. Such a gate line Y and a gate electrode WG can be formed in the same process using the same material.

  These gate lines Y and gate electrodes WG are covered with an interlayer insulating film 16 which is a second insulating film. The interlayer insulating film 16 is also disposed on the gate insulating film 14. The interlayer insulating film 16 is made of an inorganic material such as silicon oxide and silicon nitride, for example.

  The source electrode WS of the switching element W is disposed on the interlayer insulating film 16. For example, the source electrode WS is integrally formed with the source line X disposed on the interlayer insulating film 16. The source electrode WS is in contact with the source region 12S of the semiconductor layer 12.

  The drain electrode WD of the switching element W is disposed on the interlayer insulating film 16. The drain electrode WD is in contact with the drain region 12D of the semiconductor layer 12. These source line X, source electrode WS, and drain electrode WD can be formed in the same process using the same material.

  The source line X, the source electrode WS, and the drain electrode WD are covered with an organic insulating film 18 that is a third insulating film. The organic insulating film 18 is also disposed on the interlayer insulating film 16. Such an organic insulating film 18 is formed of, for example, an organic material such as a light-transmissive resin layer. Such an organic insulating film 18 is formed, for example, by being applied with a technique such as spin coating and then subjected to a curing process. For this reason, the organic insulating film 18 absorbs the unevenness of the base, and the surface thereof, that is, the side facing the liquid crystal layer LQ is formed substantially flat.

  The pixel electrode EP is disposed on the organic insulating film 18 and is electrically connected to the drain electrode WD. Such a pixel electrode EP has a reflective electrode R and a transmissive electrode T. The reflective electrode R is disposed in the reflective part PR of the pixel PX. The reflective electrode R is formed of a light reflective conductive material such as aluminum (Al). The transmissive electrode T is disposed in the transmissive part PT of the pixel PX. The transmissive electrode T is formed of a light-transmissive conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).

  The surface of the array substrate AR having such a configuration facing the counter substrate CT, that is, the surface in contact with the liquid crystal layer LQ is covered with the first alignment film 20. The first alignment film 20 is made of, for example, polyimide (PI).

  On the other hand, the counter substrate CT of the liquid crystal display panel LPN is formed using an insulating substrate 30 having optical transparency such as a glass plate or a quartz plate. The counter substrate CT includes a black matrix 31, a color filter layer 32, an overcoat layer 33, a resin layer 34, a counter electrode ET, and the like on the first surface 30A of the insulating substrate 30, that is, the side facing the array substrate AR.

  The black matrix 31 is disposed between the pixels PX. The black matrix 31 can be formed of a resin material colored black or a metal material having a light shielding property such as chromium (Cr). Such a black matrix 31 is disposed on the insulating substrate 30 and faces the switching elements W provided on the array substrate AR and various wirings such as the gate lines Y and the source lines X described above.

  The color filter layer 32 is disposed in each pixel PX and faces the pixel electrode EP. Such a color filter layer 32 is disposed on the insulating substrate 30, and a part of the color filter layer 32 is laminated on the black matrix 31 disposed so as to surround the color filter layer 32. An opening OP is formed in a part of the color filter layer 32 facing the reflective electrode R. The opening OP penetrates the color filter layer 32 to the insulating substrate 30.

  The overcoat layer 33 is disposed on the color filter layer 32 and the opening OP. The overcoat layer 33 alleviates the influence of unevenness on the surface of the color filter layer 32, and the surface, that is, the side facing the liquid crystal layer LQ is formed substantially flat. Such an overcoat layer 33 is formed of a transparent resin material.

  The resin layer 34 is disposed in the reflective portion PR and faces the reflective electrode R. The resin layer 34 is not disposed in the transmission part PT. Such a resin layer 34 is disposed on the overcoat layer 33. This resin layer 34 is formed of a transparent resin material.

  The counter electrode ET faces the pixel electrode EP of each pixel PX. Such a counter electrode ET is disposed on the overcoat layer 33 and the resin layer 34. The counter electrode ET is formed of a light-transmitting conductive material such as ITO or IZO.

  The surface of the counter substrate CT facing the array substrate AR, that is, the surface in contact with the liquid crystal layer LQ is covered with the second alignment film 36. Similar to the first alignment film 20, the second alignment film 36 is made of, for example, polyimide.

  The array substrate AR and the counter substrate CT as described above are arranged so that the first alignment film 20 and the second alignment film 36 face each other. At this time, between the first alignment film 20 of the array substrate AR and the second alignment film 36 of the counter substrate CT, a spacer (not shown) (for example, a columnar spacer integrally formed on one substrate with a resin material). Is arranged. Thereby, a predetermined cell gap is formed between the array substrate AR and the counter substrate CT.

  The liquid crystal layer LQ is enclosed in the cell gap described above. That is, the liquid crystal layer LQ is made of a liquid crystal composition including liquid crystal molecules held between the pixel electrode EP of the array substrate AR and the counter electrode ET of the counter substrate CT. The first alignment film 20 is interposed between the liquid crystal layer LQ and the pixel electrode EP. A second alignment film 36 is interposed between the liquid crystal layer LQ and the counter electrode ET.

  On one outer surface of the liquid crystal display panel LPN, that is, the second surface 10B opposite to the first surface 10A of the insulating substrate 10 constituting the array substrate AR, the first optical element OD1 having the first polarizing plate PL1 is provided. Affixed with an adhesive. The second optical element having the second polarizing plate PL2 is provided on the other outer surface of the liquid crystal display panel LPN, that is, on the second surface 30B opposite to the first surface 30A of the insulating substrate 30 constituting the counter substrate CT. OD2 is affixed with an adhesive or the like. Note that the first optical element OD1 and the second optical element OD2 may have a retardation plate as necessary.

  Further, as shown in FIG. 2, the backlight BL that illuminates the liquid crystal display panel LPN is disposed on the side of the liquid crystal display panel LPN facing the array substrate AR. As such a backlight BL, various forms can be applied, and any one using a light-emitting diode or a cold cathode tube as a light source can be applied. Description is omitted.

  FIG. 3 is a plan view schematically showing the structure of the array substrate AR in the present embodiment. In FIG. 3, each pixel PX has a reflection part PR and a transmission part PT arranged in the column direction (first direction) V. The first pixel PX1, the second pixel PX2, and the third pixel PX3 are arranged in the row direction (second direction) H in this order. For example, the first pixel PX1 is a green pixel that displays green, the second pixel PX2 is a blue pixel that displays blue, and the third pixel PX3 is a red pixel that displays red.

  The first pixel PX1 includes a first pixel electrode EP1 having a first reflective electrode R1 disposed in the first reflective part PR1 and a first transmissive electrode T1 disposed in the first transmissive part PT1. The first reflective electrode R1 and the first transmissive electrode T1 are arranged in the column direction V.

  The second pixel PX2 includes a second pixel electrode EP2 having a second reflective electrode R2 disposed in the second reflective part PR2 and a second transmissive electrode T2 disposed in the second transmissive part PT2. The second reflective electrode R2 and the second transmissive electrode T2 are arranged in the column direction V.

  The third pixel PX3 includes a third pixel electrode EP3 having a third reflective electrode R3 disposed in the third reflective part PR3 and a third transmissive electrode T3 disposed in the third transmissive part PT3. The third reflective electrode R3 and the third transmissive electrode T3 are arranged in the column direction V.

  The first reflection part PR1, the second reflection part PR2, and the third reflection part PR3 are arranged in the row direction H in this order. That is, the first reflective electrode R1, the second reflective electrode R2, and the third reflective electrode R3 are arranged in the row direction H in this order. The first transmission part PT1, the second transmission part PT2, and the third transmission part PT3 are arranged in the row direction H in this order. That is, the first transmissive electrode T1, the second transmissive electrode T2, and the third transmissive electrode T3 are arranged in the row direction H in this order.

  FIG. 4 is a plan view schematically showing the structure of the counter substrate CT superimposed on the array substrate AR shown in FIG. In FIG. 4, as in FIG. 3, the first pixel (green pixel) PX1, the second pixel (blue pixel) PX2, and the third pixel (red pixel) PX3 are arranged in this order in the row direction (second direction). Lined up with H.

  A color filter layer 32G is disposed in the first reflection part PR1 and the first transmission part PT1 of the first pixel PX1 sandwiched between the black matrices 31. The color filter layer 32G is formed of a resin material colored in green. A first opening OP1 is formed in the color filter layer 32G disposed in the first reflection part PR. The first opening OP <b> 1 is formed in a quadrangular shape, and two opposite sides OS <b> 1 and OS <b> 2 are close to the black matrix 31.

  Similarly, the color filter layer 32B is disposed in the second reflection part PR2 and the second transmission part PT2 of the second pixel PX2 sandwiched between the black matrices 31. The color filter layer 32B is formed of a resin material colored in blue. A second opening OP2 is formed in the color filter layer 32B disposed in the second reflection part PR2. The second opening OP2 is formed in a circular shape.

  Similarly, a color filter layer 32R is disposed in the third reflection part PR3 and the third transmission part PT3 of the third pixel PX3 sandwiched between the black matrices 31. The color filter layer 32R is formed of a resin material colored in red. A third opening OP3 is formed in the color filter layer 32R disposed in the third reflection part PR3. The third opening OP3 is formed in the same circular shape as the second opening OP2.

  The resin layer 34 extends in the row direction H, and is, for example, a reflective portion for every three pixels, that is, the first reflective portion PR1 of the first pixel PX1, the second reflective portion PR2 of the second pixel PX2, and the third pixel PX3. The third reflection part PR3 is disposed in common. That is, the resin layer 34 is disposed directly over the color filter layer 32G of the first pixel PX1, over the black matrix 31 between the first pixel PX1 and the second pixel PX2, via the overcoat layer (not shown), The color filter layer 32B is disposed immediately above the color filter layer 32B of the pixel PX2, directly above the black matrix 31 between the second pixel PX2 and the third pixel PX3, and directly above the color filter layer 32R of the third pixel PX3. As a matter of course, the resin layer 34 is also disposed directly above the first opening OP1, the second opening OP2, and the third opening OP3. Although not shown, the first pixel PX1 to the third pixel PX3 are repeatedly arranged in the row direction H, and the resin layer 34 is also repeatedly arranged for every three pixels corresponding to this.

  As described above, in this embodiment, the resin layer 34 is divided into three pixels, and the resin layer 34 and the resin layer 34 adjacent in the row direction (second direction) of the resin layer 34 are equal to the width of the black matrix 31. They are spaced apart. In other words, the red, blue, and green pixels are used as one unit, and the resin layer 34 is arranged in an island shape for each unit. By disposing the resin layer 34 in this manner, the overcoat layer 33 and a film applied on the resin layer 34, such as an alignment film, flow through the grooves between the resin layers 34 disposed in an island shape. It can be applied evenly over the entire substrate. On the other hand, in the case where the resin layer 34 is arranged continuously across the pixels without interruption, an alignment film or the like is provided between the resin layer 34 and the resin layer 34 adjacent in the column direction (V direction). There is a possibility that the coating film accumulates and the coating film becomes uneven.

  The resin layer 34 is formed in a rectangular shape and has, as four edges, a pair of long sides L1 and L2 extending in the row direction H and a pair of short sides S1 and S2 extending in the column direction V. . The lengths of the long sides L1 and L2 are substantially equal to the length along the row direction H for three pixels. The lengths of the short sides S1 and S2 are substantially the same as the length along the column direction V of one pixel, for example, the first reflection part PR1. The short side S1 of the resin layer 34 is located substantially immediately above the black matrix 31 and the side OS1 of the first opening OP1.

  The counter electrode ET is disposed on the resin layer 34 in the first to third reflecting portions PR1 to PR3 and on the overcoat layer (not shown) in the first to third transmitting portions PT1 to PT3. In such a counter electrode ET, peeling is likely to occur at a portion covering the short side S1 of the resin layer 34. This is because the first opening OP1 is larger than the second opening OP2 and the third opening OP3, and the first side formed in the short side S1, the black matrix 31, and the color filter layer 32G of the resin layer 34. Due to the proximity of the side OS1 of the opening OP1, stress strains resulting from differences in the thermal expansion coefficients of the materials forming the resin layer 34, the black matrix 31, and the color filter layer 32G are concentrated. Yes.

  FIG. 5 is a plan view schematically showing the structure of the counter substrate CT of the first embodiment superimposed on the array substrate AR shown in FIG. The same components as those of the counter substrate CT shown in FIG.

  In the color filter layer 32G disposed in the first pixel PX1 between the black matrices 31, a first opening OP1 having a substantially rectangular shape is formed in the first reflection part PR1. The first opening OP1 has sides OS1 to OS4 as four edges. The first opening OP1 has a circular second opening OP2 formed in the color filter layer 32B of the second reflection part PR2 of the second pixel PX2, and a third reflection part PR3 of the third pixel PX3. It is formed larger than any area of the circular third opening OP3 formed in the color filter layer 32R.

  The resin layer 34 is disposed in the first to third reflecting portions PR1 to PR3, and, of course, is also disposed on the first to third openings OP1 to OP3. Such a resin layer 34 is formed in a rectangular shape, and has, as four edges, a pair of long sides L1 and L2 extending in the row direction H and a pair of short sides S1 and S2 extending in the column direction V. is doing. The short sides S1 and S2 and the long sides L1 and L2 do not overlap directly above the sides OS1 to OS4 of the first opening OP1, and are outside the positions directly above these sides OS1 to OS4. Is located.

  In the first embodiment, of the three reflecting portions PR1 to PR3 covered by the resin layer 34, the first opening OP1 formed in the first reflecting portion PR1 on the end side is closer to the center, that is, the second reflecting portion. It is unevenly distributed on the side of the part PR2. In other words, the first opening OP1 is disposed apart from the short side S1 of the resin layer 34 and is close to the black matrix 31 between the first pixel PX1 and the second pixel PX2. Further, when the counter substrate CT having such a configuration is overlapped with the array substrate AR shown in FIG. 3, the first opening OP1 is located on the second reflective electrode R2 side disposed in the second pixel PX2. It is unevenly distributed.

  For this reason, the side OS1 of the first opening OP1 is arranged at a distance from the short side S1 of the resin layer 34. Further, all of the other sides OS2 to OS4 of the first opening OP1 are disposed on the inner side of the short sides S1 and S2 and the long sides L1 and L2 of the resin layer 34. The sides OS1 to OS4 of the first opening OP1 are desirably arranged at a distance of 7 μm or more from the short sides S1 and S2 and the long sides L1 and L2 of the resin layer 34.

  According to the first embodiment, local stress strain concentration can be suppressed, and the first to third transmission layers on the resin layer 34 in the first to third reflecting portions PR1 to PR3. It is possible to suppress peeling of the counter electrode ET disposed on the overcoat layer (not shown) in the portions PT1 to PT3.

  Therefore, it is possible to prevent display defects and bubbles from being generated due to peeling of the counter electrode ET, thereby improving display quality and improving reliability.

  In the first embodiment, the case where the first opening OP1 formed in the first pixel PX1 that is a green pixel is the largest is described. However, the first pixel PX1 may be a blue pixel or a red pixel. . That is, the largest opening may be formed in the blue pixel or the red pixel. When the resin layer 34 is disposed across the plurality of pixels PX arranged in the row direction H, the short sides S1 and S2 of the resin layer 34 are located outside the position immediately above the edge of the opening formed in the color filter layer. Therefore, peeling of the counter electrode ET can be suppressed.

  In particular, when the largest opening is formed in the pixel on the end side of the resin layer 34, the edge of the resin layer 34 is located outside the edge of the opening, so that the opening The effect of the step of the color filter layer due to this is mitigated, and the unevenness of the resin layer 34 disposed via the overcoat layer 33 is also reduced, so that the peeling of the counter electrode ET disposed on the resin layer 34 is suppressed. it can.

  Next, a modification of the first embodiment will be described.

  In the first modification shown in FIG. 6, the first opening OP1 is formed in a circular shape. The area of the first opening OP1 is substantially the same as the rectangular first opening shown in FIG. 5, and is larger than the areas of the second opening OP2 and the third opening OP3. The short sides S1 and S2 and the long sides L1 and L2 of the resin layer 34 are both located outside the position immediately above the edge of the first opening OP1.

  In the first modification, the same effect as described above can be obtained.

  In the second modification shown in FIG. 7, the first opening OP1 is formed in a pin cushion shape (or a pincushion shape). That is, the first opening OP1 is curved so that the sides OS1 to OS4 which are the edges of the four sides are recessed inward while being substantially rectangular. The area of the first opening OP1 is substantially the same as the rectangular first opening shown in FIG. 5, and is larger than the areas of the second opening OP2 and the third opening OP3. The short sides S1 and S2 and the long sides L1 and L2 of the resin layer 34 are both located outside the position immediately above the sides OS1 to OS4 of the first opening OP1.

  In the second modification, the same effect as described above can be obtained.

  In the third modification shown in FIG. 8, the first opening OP1 is formed by a plurality of holes HL. Each hole HL is formed in a circular shape, for example, but may have another shape, for example, a polygonal shape such as a triangle or a quadrangle. These holes HL are arranged in a matrix. The total area of these holes HL, that is, the area of the first opening OP1, is substantially the same as the rectangular first opening shown in FIG. 5, and is larger than the areas of the second opening OP2 and the third opening OP3. large. The short sides S1 and S2 and the long sides L1 and L2 of the resin layer 34 are all located outside the positions directly above the holes HL.

  In the third modification, the same effect as described above can be obtained. In addition, since the first opening OP1 is formed by the plurality of holes HL having a minute diameter, the unevenness of the resin layer 34 disposed via the overcoat layer 33 disposed thereon is further reduced. Therefore, peeling of the counter electrode ET disposed on the resin layer 34 can be suppressed.

  In the fourth modification shown in FIG. 9, the first opening OP1 is formed by a plurality of slits SL. Each slit SL has a substantially rectangular shape extending in the column direction V. These slits SL are arranged along the row direction H. The total area of these slits SL, that is, the area of the first opening OP1 is substantially the same as the rectangular first opening shown in FIG. 5, and is larger than the areas of the second opening OP2 and the third opening OP3. large. The short sides S1 and S2 and the long sides L1 and L2 of the resin layer 34 are all located outside the position immediately above each slit SL.

  In the fourth modification, the same effect as in the third modification described above can be obtained.

  Next, a second embodiment will be described.

  FIG. 10 is a plan view schematically showing the structure of the counter substrate CT of the second embodiment superimposed on the array substrate AR shown in FIG. The same components as those of the counter substrate CT shown in FIG.

  In the second embodiment, when the resin layer 34 is disposed across three or more pixels PX arranged in the row direction H, the area of the openings formed in the pixels located at both ends of the resin layer 34 is as follows. It differs from the first embodiment described above in that it is smaller than the area of the opening formed in the pixel between them.

  In the example shown in FIG. 10, the first pixel PX1, the second pixel PX2, and the third pixel PX3 are arranged in the row direction H in this order. For example, the first pixel PX1 is a red pixel that displays red, the second pixel PX2 is a green pixel that displays green, and the third pixel PX3 is a blue pixel that displays blue.

  In the first pixel PX1 between the black matrices 31, a color filter layer 32R is disposed in the first transmission part PT1 and the first reflection part PR1. In the color filter layer 32R, a circular first opening OP1 is formed in the first reflection part PR1. Similarly, in the third pixel PX3 between the black matrices 31, the color filter layer 32B is disposed in the third transmission part PT3 and the third reflection part PR3. In the color filter layer 32B, a circular third opening OP3 is formed in the third reflection part PR3. The first opening OP1 and the third opening OP3 have substantially the same area.

  In the second pixel PX2 between the black matrices 31, a color filter layer 32G is disposed in the second transmission part PT2 and the second reflection part PR2. In the color filter layer 32G, a second opening OP2 having a substantially square shape is formed in the second reflection part PR2. The second opening OP2 has sides OS1 to OS4 as edges on all sides. Such a second opening OP2 is formed larger than any area of the first opening OP1 and the third opening OP3.

  The resin layer 34 is disposed in the first to third reflecting portions PR1 to PR3, and, of course, is also disposed on the first to third openings OP1 to OP3. Such a resin layer 34 is formed in a rectangular shape, and has, as four edges, a pair of long sides L1 and L2 extending in the row direction H and a pair of short sides S1 and S2 extending in the column direction V. is doing. The short sides S1 and S2 and the long sides L1 and L2 do not overlap directly above the sides OS1 to OS4 of the second opening OP2, and are outside the positions directly above these sides OS1 to OS4. Is located.

  In the second embodiment, of the three reflecting portions PR1 to PR3 covered by the resin layer 34, the first opening OP1 and the third reflecting portion PR3 formed in the first reflecting portion PR1 on both sides of the resin layer 34. The third opening OP3 formed in the area has a smaller area than the second opening OP2 formed in the second reflection part PR2 at the center of the resin layer 34. In other words, the second opening OP2 formed in the second reflection part PR2 at the center of the resin layer 34 has the largest area. When the counter substrate CT having such a configuration is overlapped with the array substrate AR shown in FIG. 3, the second opening OP2 faces the second reflective electrode R2 arranged in the second pixel PX2. Yes.

  Therefore, any of the sides OS1 to OS4 of the second opening OP2 is disposed on the inner side of the short sides S1 and S2 and the long sides L1 and L2 of the resin layer 34.

  According to the second embodiment, local stress strain concentration can be suppressed, and the resin layer 34 in the first to third reflection parts PR1 to PR3 and the first to third transmissions can be suppressed. It is possible to suppress peeling of the counter electrode ET disposed on the overcoat layer (not shown) in the portions PT1 to PT3.

  Therefore, it is possible to prevent display defects and bubbles from being generated due to peeling of the counter electrode ET, thereby improving display quality and improving reliability.

  In the second embodiment, the case where the second opening OP2 formed in the second pixel PX2 that is a green pixel is the largest has been described. However, the second pixel PX2 may be a blue pixel or a red pixel. .

  Also in the second embodiment, any one of the modifications 1 to 4 described in the first embodiment can be applied, and the second opening OP2 may be circular or pincushion-shaped, or may have a plurality of holes HL. Alternatively, it may be formed by a plurality of slits SL.

  As described above, according to this embodiment, a liquid crystal display device capable of improving display quality and reliability can be provided.

  In addition, this invention is not limited to the said embodiment itself, In the stage of implementation, it can change and implement a component within the range which does not deviate from the summary. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

LPN ... Liquid crystal display panel AR ... Array substrate CT ... Counter substrate LQ ... Liquid crystal layer DSP ... Active area PX ... Pixel PR ... Reflection part PT ... Transmission part EP ... Pixel electrode R ... Reflection electrode T ... Transmission electrode 32 ... Color filter layer OP ... Opening HL ... Hole SL ... Slit 33 ... Overcoat layer 34 ... Resin layer ET ... Counter electrode

Claims (5)

A first color filter layer disposed in a first pixel having a first reflection part and a first transmission part arranged in a first direction;
A first opening formed in the first color filter layer of the first reflecting portion;
Second transmission lined in the second direction of the first transmission part of the first pixel and having a second reflection part lined up in a second direction orthogonal to the first direction of the first reflection part of the first pixel. A second color filter layer disposed in a second pixel having a portion;
A second opening formed in the second color filter layer of the second reflecting portion and smaller than the first opening;
An overcoat layer disposed on the first to second color filter layers and the first to second openings;
A resin layer that extends in the second direction and is disposed on the overcoat layer of the first reflective portion and the second reflective portion, and has an edge formed outside the edge of the first opening. When,
A counter electrode disposed on the overcoat layer and the resin layer;
A liquid crystal display device comprising:   The liquid crystal display device according to claim 1, wherein the first opening is unevenly distributed on the second reflecting portion side. A first pixel electrode having a first reflective electrode and a first transmissive electrode arranged in a first direction, and a second reflection arranged in a second direction orthogonal to the first direction of the first reflective electrode of the first pixel electrode A first substrate comprising a second pixel electrode having an electrode;
A first color filter layer facing the first pixel electrode; a first opening formed in a part of the first color filter layer facing the first reflective electrode; and a second color facing the second pixel electrode. A filter layer; a second opening that is formed in a part of the second color filter layer facing the second reflective electrode and is smaller than the first opening; the first to second color filter layers and the first An overcoat layer disposed on the second opening, and faces the first reflective electrode on the overcoat layer and extends in the second direction so as to face the second reflective electrode. A resin layer in which an edge is formed on the outer side directly above the edge of one opening, a counter electrode disposed on the overcoat layer and the resin layer, and a second substrate comprising:
A liquid crystal layer held between the array substrate and the counter substrate;
A liquid crystal display device comprising: A first color filter layer disposed in a first pixel having a first reflection part and a first transmission part arranged in a first direction;
A first opening formed in the first color filter layer of the first reflecting portion;
Second transmission lined in the second direction of the first transmission part of the first pixel and having a second reflection part lined up in a second direction orthogonal to the first direction of the first reflection part of the first pixel. A second color filter layer disposed in a second pixel having a portion;
A second opening formed in the second color filter layer of the second reflecting portion and larger than the first opening;
A third pixel having a third reflective portion arranged in the second direction of the second reflective portion of the second pixel and having a third transmissive portion arranged in the second direction of the second transmissive portion of the second pixel. A third color filter layer disposed on
A third opening formed in the third color filter layer of the third reflecting portion and smaller than the second opening;
An overcoat layer disposed on the first to third color filter layers and the first to third openings;
A resin layer extending in a second direction and disposed on the overcoat layer of the first to third reflective portions;
A counter electrode disposed on the overcoat layer and the resin layer;
A liquid crystal display device comprising: A first pixel electrode having a first reflective electrode and a first transmissive electrode arranged in a first direction, and a second reflection arranged in a second direction orthogonal to the first direction of the first reflective electrode of the first pixel electrode A first substrate comprising: a second pixel electrode having an electrode; and a third pixel electrode having a third reflective electrode arranged in a second direction of the second reflective electrode of the second pixel electrode;
A first color filter layer facing the first pixel electrode; a first opening formed in a part of the first color filter layer facing the first reflective electrode; and a second color facing the second pixel electrode. A filter layer, a second opening larger than the first opening formed in a part of the second color filter layer facing the second reflective electrode, a third color filter layer facing the third pixel electrode, A third opening smaller than the second opening formed in a part of the third color filter layer facing the third reflective electrode, the first to third color filter layers, and the first to third. An overcoat layer disposed on the opening; a resin layer facing the first to third reflective electrodes on the overcoat layer and extending in a second direction; and the overcoat layer A counter electrode disposed on the coating layer and the resin layer, and a second substrate having,
A liquid crystal layer held between the array substrate and the counter substrate;
A liquid crystal display device comprising:

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