JP4921143B2 - Liquid crystal display device and active matrix substrate - Google Patents

Description

  The present invention relates to an active matrix substrate, a liquid crystal display device using the active matrix substrate, and an electronic apparatus including the liquid crystal display device. In particular, the present invention relates to an electronic device such as an active matrix substrate having a dummy electrode in a seal region, a liquid crystal display device using the same, a liquid crystal projector device including the liquid crystal display device, and a rear projection device.

  In recent years, FPDs (flat panel displays) such as liquid crystal systems and plasma systems have begun to spread widely in response to demands for thinning, high definition, and large screens in the market. FPD is also beginning to move from the development stage to the mass production stage. In particular, the penetration rate of the liquid crystal system greatly exceeds other systems.

  The liquid crystal display device includes an active matrix substrate (first substrate) having a display region in which a plurality of pixel electrodes arranged in two dimensions are arranged, and a light transmissive electrode provided to face the pixel electrodes. A counter substrate (second substrate). Furthermore, the sealant is disposed around the display area of the active matrix substrate, and is disposed in a region surrounded by the sealant between the first substrate and the second substrate, and a sealant that bonds the active matrix substrate and the counter substrate. Liquid crystal.

  The liquid crystal display device has a problem in that when the sealing material is applied to and bonded to the substrate, the sealing material is crushed and spreads to protrude from the end face of the substrate and contaminate the panel surface. In order to prevent this problem, in Patent Document 1, in order to prevent the sealing material from flowing out of the chip due to the bleeding / flowing of the sealing material, the fluidity of the sealing material is controlled along the outer edge of the sealing region to serve as a stopper. A seal control pattern is provided.

Apart from this, one of the causes of gap unevenness is a structural problem on the substrate surface. There is a problem in that it is difficult to form a uniform gap when the height of the substrate surface is uneven depending on the location in the seal region, or when there is a difference in the height of the substrate surface between the seal region and the display region. As described in Patent Document 2, a dummy electrode provided with the same material is formed in the seal region simultaneously with the formation of the pixel electrode in the display region, and the height of the substrate surface in the seal region and the display region is made uniform. It is addressed.
JP 2005-148478 A JP 2001-305666 A

  The alignment control of the liquid crystal is controlled by the voltage applied between the alignment film formed on the substrate surface and the upper and lower substrates. Therefore, the alignment control of the liquid crystal cannot be performed at the liquid crystal interface of the sealing material where no alignment film exists and no voltage is applied, and an alignment defect in the vicinity of the sealing material cannot be avoided. Therefore, the display area is required to be separated from the seal area so as not to be affected by poor alignment in the vicinity of the seal area. In the method of Patent Document 1, the spread of the seal region into the chip cannot be suppressed, and the interval between the display region and the seal region must be wide.

  In addition, when a spacer is present in the display area, polarization modulation cannot be performed at the location where the spacer is present, and the fineness of the black or white display image is impaired. For this reason, it may be required to perform bonding by arranging a spacer only in the seal region. However, in the case of a configuration in which the spacer is arranged only in the seal region, it is not always easy to perform the gap control uniformly, and the method of Patent Document 2 cannot suppress the warp of the substrate, and the warp of the substrate is not liquid crystal. This is a factor that hinders the formation of a uniform gap over the entire display device.

  The above-mentioned poor alignment in the vicinity of the seal region and gap unevenness due to the warpage of the substrate have a great influence on the image particularly in a small liquid crystal display device that displays an enlarged image. As such liquid crystal display devices, there are small liquid crystal display devices such as LCOS (Liquid Crystal On Silicon) method, poly-Si TFT type reflection type liquid crystal display device and transmission type TFT liquid crystal method used for rear projection type televisions. is there. A small liquid crystal display device that performs color display using three display devices for each RGB color without using the field sequential method does not cause a color break phenomenon, and in particular, the LCOS method can achieve a seamless image with a high aperture ratio. Therefore, it is attracting attention because of its high image quality. In the LCOS method using a semiconductor substrate such as a single crystal silicon wafer, the influence of gap control unevenness due to the warpage of the substrate is particularly significant.

  An object of the present invention is to provide an active matrix substrate capable of reducing or eliminating misalignment in the vicinity of a seal region and gap unevenness due to substrate warpage, a liquid crystal display device using the same, a liquid crystal projector device including a liquid crystal display device, a rear It is to provide a projection apparatus.

The liquid crystal display device of the present invention includes a first substrate having a display region in which a plurality of pixel electrodes arranged in two dimensions are arranged, and a light-transmitting electrode provided so as to face at least the pixel electrode. wherein the second substrate, the disposed first so as to surround the periphery of the display area of the substrate, and the sealing material for bonding the said first substrate and said second substrate, said first substrate A liquid crystal display device including a liquid crystal disposed in a region surrounded by the sealing material with a second substrate, wherein the pixel electrode is disposed in a sealing region of the first substrate where the sealing material is disposed. A plurality of dummy electrodes having the same or similar shape are arranged, and the plurality of dummy electrodes at the inner edge of the seal region are arranged along the circumferential direction of the inner edge of the seal region by a connecting member thinner than the width of the dummy electrode. are connected, double The dummy electrodes of said by a thin connecting member than the dummy electrodes, characterized in that it is connected in a direction perpendicular to the circumferential direction of the seal region.

  The liquid crystal projector device and the rear projection device of the present invention use the liquid crystal display device of the present invention.

The active matrix substrate of the present invention includes a plurality of pixel electrodes arranged two-dimensionally in a display region, and the pixel electrodes provided in a seal region that is disposed so as to surround the periphery of the display region and in which a sealing material is disposed. And a plurality of dummy electrodes at the inner edge of the seal region are arranged along the circumferential direction of the inner edge of the seal region by a connecting member narrower than the width of the dummy electrode. The plurality of dummy electrodes are connected to each other in a direction perpendicular to the circumferential direction of the seal region by a connecting member thinner than the dummy electrodes .

  According to the present invention, by providing a substrate in which warpage is suppressed as much as possible, or a substrate formed in a uniform warp that can be corrected at the time of bonding, a uniform gap can be formed and color unevenness is unlikely to occur. In addition, it is possible to suppress the spread of the sealing material at the time of bonding. As a result, it is possible to realize a high-quality active matrix substrate, liquid crystal display device, liquid crystal projector device, and rear projection device that can be easily downsized.

  Hereinafter, embodiments of the structure of the liquid crystal display device of the present invention will be described with reference to the drawings. However, this embodiment shows one aspect of the present invention, and does not limit the present invention, and can be arbitrarily changed within the scope of the present invention.

(First embodiment)
FIG. 1 is a sectional view showing a part of an end portion of the liquid crystal display device according to the first embodiment of the present invention, and a plan view of an active matrix substrate at the end portion.

  An active matrix substrate (to be a first substrate) 11 is formed with a driving circuit such as a MOS transistor and a storage capacitor on a semiconductor substrate, and a reflective electrode serving as a pixel electrode via a light shielding film and an interlayer insulating film thereon. 7 is an LCOS (Liquid Crystal On Silicon) chip in which 7 is formed. The reflective electrode 7 can be made of a metal material mainly composed of aluminum, such as aluminum or an aluminum alloy. In FIG. 1, the drive circuit, the light shielding film, the interlayer insulating film, the protective film on the reflective electrode, the alignment film, and the like are omitted.

The reflective electrode 7 as a pixel electrode has a square shape with a side length of 10 μm. The reflective electrodes 7 are two-dimensionally arranged with a vertical pitch of 1050 pixels and a horizontal width of 1400 pixels at a pitch of 0.4 μm to form a display area 2 corresponding to the resolution of SXGA +. Display area around the 2 are dummy electrode 6 ₁ is positioned in the non-display area 3 where the potential is supplied for constantly black display, the dummy electrodes electrically in the floating state in the sealing region 4 therearound 6 ₂ is arranged. Outside the sealing region 4 has the seal area outside 5, the same electrically are arranged dummy electrode 6 ₃ floating. Any of the dummy electrodes 6 ₁ , 6 ₂ , 6 ₃ is formed with the same material, shape and pitch as the reflective electrode 7.

Dummy electrodes on the inner edge side and outer edge side (near the boundary with the non-display area and near the boundary with the seal outer area) along the circumferential direction of the seal area in the seal area in contact with the non-display area and the outer seal area, respectively. the dummy electrode connecting patterns _{81, 82} is provided with the connecting 6 _2. The dummy electrode connection pattern serves as a connection member. The dummy electrode connection patterns 8 ₁ and 8 ₂ are formed by a wiring having a width of 2.0 μm and made of the same material at the same time when the pixel electrode is formed.

  A counter substrate (to be a second substrate) 10, which is a light-transmitting substrate such as a glass substrate, is disposed opposite to the active matrix substrate (to be the first substrate) 11. A light transmissive electrode 13 made of ITO or the like is provided so as to face each other. A gap (interval) 17 between the active matrix substrate 11 and the counter substrate 10 is held by a spacer 9 such as glass beads. The spacer 9 is provided in the sealing material 12. A liquid crystal (not shown) is disposed between the active matrix substrate 11 and the counter substrate 10. Thus, the liquid crystal display device 1 is configured.

  In order to prevent gap unevenness, which is one of the causes of color unevenness in a small-sized liquid crystal display device, the technique described in Patent Document 2 is not sufficient, and suppresses warping of the substrate as much as possible. Even if this occurs, measures to make it evenly warped are required. In the case of the uniform warp as shown in FIG. 2A, the warp is corrected by solidifying the sealing material in a state where an equal force is applied at the time of bonding, and the uniform gap as shown in FIG. 2B. 17 can be formed. However, when the region 106 with large warpage and the region 107 with small warpage coexist as shown in FIG. 2C, the sealing material is solidified with a uniform force applied at the time of bonding as shown in FIG. 2D. Even in this case, there is a region 108 where the warp remains. In order to suppress the warpage as much as possible and make the warpage even when warpage occurs, dummy electrodes are formed not only on the seal area but also on the entire surface of the substrate other than the display area. In this case, the size (area) / shape of the dummy electrode is similar to the size (area) / shape of the pixel electrode formed in the display region, preferably the same.

However, as shown in FIG. 3 (a), when the dummy electrode 6 ₂ is disposed in the sealing region, the inter-electrode gap between the dummy electrode and the dummy electrode is formed. Then, as shown in FIG. 3B, a seal application failure 201 in which the seal material is not properly filled in the gap between the dummy electrodes is likely to occur during seal application / bonding, and as shown in FIG. There arises a problem that the water inflow path 202 tends to become.

  Furthermore, alignment failure, which is one of the causes of color unevenness in a small liquid crystal display device, in particular, alignment failure at the interface between the sealing material and the liquid crystal cannot be avoided. However, in the case of a small liquid crystal display device, the liquid crystal display device can be further miniaturized by reducing the seal width as much as possible and preventing the seal material from flowing and blurring while placing the seal region at the outermost edge of the small liquid crystal display device. It is desirable to realize. For this purpose, the technique described in Patent Document 1 is insufficient, and in addition, measures for preventing the sealing material from spreading inside the chip and approaching the display area are required.

A countermeasure, as shown in FIG. 1, not only to form a dummy electrode connecting patterns ₈₂ in the sealing region 4 in contact with the sealing area outside 5, the dummy electrode connection pattern ₈₁ in the sealing region 4 in contact with the non-display area 3 It can be realized by arranging. The dummy electrode connection pattern ₈₁ is sealing material during bonding to the role of a stopper for preventing the spread inside the chip.

Here, if the size / shape of the dummy electrodes 6 ₁ , 6 ₂ , 6 _{3 and} the size / shape of the dummy electrode connection patterns 8 _1, 8 ₂ are significantly different from those of the pixel electrode 7, non-uniform stress is generated. Causes uneven warping.

In the present embodiment, in order to avoid the warp described with reference to FIG. 2D, pixels are respectively provided in the seal outer region 5, the inner non-display region 3, and the seal region 4 outside the seal region 4 on the chip. Dummy electrodes 6 ₃ , 6 ₁ , 6 ₂ that are similar in size and shape to the electrodes, and preferably coincide with _{each other} , are arranged. Then, the dummy electrode connecting patterns _81, 82 are connected to each other along the outer edge, the inner edge of the seal area by wiring provided by the same material at the same time as the thin pixel electrode forming the dummy electrode 6 ₂ of the magnitude Make the structure. Thus, a dummy electrode connection pattern that also serves as a dummy electrode for accurately forming the gap can be realized. By this dummy electrode connection pattern, a region without a gap between the dummy electrodes is formed by the dummy electrode connection pattern 8 as shown in FIG. 4 (a), and this portion is formed as shown in FIG. 4 (b). Then, no gap is formed by the dummy electrode connection pattern 8. As a result, as shown in FIG. 4 (c), even if the sealing material 12 does not fill the gap between the dummy electrodes well and the moisture inflow path 202 is formed, the dummy electrode connection pattern 8 causes the moisture inflow from the outside. The route blocking region 203 can be formed.

In the present embodiment, as described above, the dummy electrode connecting patterns _81, 82 of width is formed narrower the dummy electrode 6 ₂ of the size. If the width of the dummy electrode connection pattern is smaller than the size of the dummy electrode, compared with the case where the width of the dummy electrode connection pattern is the same as the size of the dummy electrode, the dummy electrode connection pattern is not provided with the dummy electrode or pixel electrode portion. The stress difference can be reduced.

Depending on the size of the active matrix substrate of a liquid crystal display device, the width of the dummy electrode connecting patterns _81, 82, relative to the size of the dummy electrodes 6 _2, preferably 30% or less, more than 20% preferable. If it is 30% or less, display unevenness in the display area caused by warping is reduced, and it can be adopted as a high resolution product of the SXGA class. Further, if it is 20% or less, display unevenness is further reduced, and it can be adopted as a UXGA class high resolution product. The lower limit of the width of the dummy electrode connection patterns 8 _{1 and} 8 ₂ is determined in consideration of a process margin in the manufacturing process, and is set to a width that allows exposure and etching, and a width that does not deform the pattern in the planarization process. Specifically, about 0.3 μm is the lower limit value of the width of the dummy electrode connection patterns 8 _1, 8 ₂ . The height of the dummy electrode connection patterns 8 _1, 8 ₂ is desirably a height that can be regarded as the same as or substantially the same as the height of the dummy electrode from the viewpoint of forming the moisture inflow path blocking region 203. However, even if the heights of the dummy electrode connection patterns 8 _{1 and} 8 ₂ are lower than the height of the dummy electrodes, a moisture inflow path blocking effect can be obtained as compared with the case where the dummy electrode connection pattern is not formed. It goes without saying that the width range and height of the dummy electrode connection pattern are similarly applied to the embodiments described later.

  With such a structure, the warpage of the substrate is suppressed, and even when warpage occurs, the warpage can be easily corrected by curing the sealing material while applying a uniform pressure during bonding. A substrate can be provided. As a result, a high-quality liquid crystal display device having a gap accuracy improved by 30% as compared with the prior art was realized. In addition, since the seal spreads along the dummy electrode connection pattern at the time of bonding, it can be formed with the minimum necessary seal width, and the area can be reduced by 10% compared to the conventional case.

(Second Embodiment)
FIG. 5 is a sectional view showing a part of an end portion of the liquid crystal display device according to the second embodiment of the present invention, and a plan view of the active matrix substrate at the end portion. 5, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

In the present embodiment, dummy electrode connection patterns 8 ₁ and 8 ₂ are provided on the inner edge side and the outer edge side, respectively, along the circumferential direction of the seal region, similarly to the first embodiment. Then, further, the width 3.0μm of wirings provided by the same material at the same time as the pixel electrode formed on the (near the boundary between the seal region) outer edge along the circumferential direction of the non-display area 3, connecting the dummy electrode 6 ₁ the dummy electrode connection pattern 8 ₃ is provided with the. Also, the wiring width 3.0μm provided by the same material at the same time as the pixel electrode formed on the inner edge side along the circumferential direction (around the boundary between the seal area) of the seal outside the area 5, the dummy linked dummy electrode 6 ₃ electrode connection pattern 8 ₄ are provided.

With such a structure, the warpage of the substrate is suppressed, and even when warpage occurs, the warpage can be easily corrected by curing the sealing material while applying a uniform pressure during bonding. A substrate can be provided. As a result, a high-quality liquid crystal display device having a gap accuracy improved by 30% as compared with the prior art was realized. In addition, since the seal spreads along the dummy electrode connection pattern at the time of bonding, it can be formed with the minimum necessary seal width, and the area can be reduced by 10% compared to the conventional case. Further, the moisture inflow path blocking region described in the first embodiment is further increased by providing the dummy electrode connection patterns 8 _{3 and} 8 ₄ in addition to the dummy electrode connection patterns 8 ₁ and 8 _2, and the effect of blocking the water inflow path is increased. To do.

In FIG. 5, the dummy electrode connection patterns 8 _{3 and} 8 ₄ arranged on the outer edge of the non-display area and the inner edge of the outer area of the seal connect the dummy electrodes in the respective areas in a row, but the number is not particularly limited to this number. Alternatively, the connection may be formed by any number of columns (two or more columns).

(Third embodiment)
FIG. 6 is a sectional view showing a part of an end portion of a liquid crystal display device according to a third embodiment of the present invention, and a plan view of an active matrix substrate at the end portion. In FIG. 6, the same constituent members as those in FIG.

  In the third embodiment shown in FIG. 6, a drive circuit is formed by a thin film transistor on a glass substrate 31, and a light transmissive electrode 27 containing ITO as a main component is provided on the glass substrate 31 through a light shielding film and an interlayer insulating film. This is a formed TFT liquid crystal chip. In FIG. 6, the drive circuit, the light shielding film, the interlayer insulating film, the protective film on the transparent electrode, the alignment film, and the like are omitted.

The transparent electrode 27 as a pixel electrode has a square shape with a side length of 10 μm. The transparent electrodes 27 are arranged in a matrix of 1080 pixels vertically and 1920 pixels horizontally at a pitch of 0.4 μm to form a display region corresponding to a resolution of 1080P (full HD). The periphery of the display area is arranged dummy electrode 26 ₁ is in the non-display area 3 has potential for causing the constant black display is supplied, the dummy electrode 26 _{and second} electrical To float the sealing region 4 therearound Is arranged. Outside the sealing region 4 has the seal area outside 5, the same electrically are arranged dummy electrodes 26 ₃ floating. Each dummy electrode is formed with the same material, shape, and pitch as the transparent electrode 27.

In the present embodiment differs from the second embodiment, the dummy electrode connecting patterns 28 1 which is connected to dummy electrodes circumferentially sealing entire region of the sealing _area, 28 _2, 28 ₃ are provided. Then, as in the second embodiment, the dummy electrode connection pattern 28 ₄ formed by connecting the dummy electrode 26 ₁ to the outer edge side (near the boundary between the sealing region) along the circumferential direction of the non-display region is provided. The dummy electrode connection pattern 28 ₅ coupled to the dummy electrode 26 ₃ to the inner edge side along the circumferential direction of the seal outside the area (vicinity of the boundary between the sealing region) is provided. Each dummy electrode connecting patterns ₂₈ 1 -28 ₅ is formed by the width 3.0μm of wirings provided by the same material at the same time as the pixel electrode formation.

  With such a structure, it is possible to suppress the warpage of the substrate and provide a substrate that can be easily corrected by curing the sealing material while applying a uniform pressure during bonding even when warpage occurs. can do. As a result, a high-quality liquid crystal display device having a gap accuracy improved by 30% as compared with the prior art was realized. In addition, since the seal spreads along the dummy electrode connection pattern at the time of bonding, it can be formed with the minimum necessary seal width, and the area can be reduced by 5% compared to the conventional case. Further, since the dummy electrode connection pattern is formed over the entire seal region, it is possible to flexibly cope with the misalignment during the seal application, and the seal application failure can be reduced and the yield is improved by 2%.

  In FIG. 6, the dummy electrode connection patterns arranged in the non-display area and the non-seal area connect the dummy electrodes in each area in one row. However, the number is not limited to this number. It may be formed in a connected manner.

(Fourth embodiment)
FIG. 7 is a cross-sectional view showing a part of an end portion of a liquid crystal display device according to a fourth embodiment of the present invention, and a plan view of an active matrix substrate at the end portion. In FIG. 7, the same components as those in FIG.

The reflective electrode 7 as a pixel electrode has a square shape with a side length of 10 μm. The reflective electrodes 7 are arranged in a matrix of 1200 pixels in the vertical direction and 1920 pixels in the horizontal direction at a pitch of 0.4 μm, and a display area corresponding to the resolution for UXGA · 1080P is formed. Like the first embodiment, the periphery of the display area 2, and a non-display area 3 has potential for causing the constant black display is supplied dummy electrode ₆₁ is disposed in the sealing region 4 therearound the electrical dummy electrode 6 ₂ of the floating is arranged. Outside the sealing region 4 has the seal area outside 5, the same electrically are arranged dummy electrode 6 ₃ floating. Any of the dummy electrodes 6 ₁ , 6 ₂ , 6 ₃ is formed with the same material, shape and pitch as the reflective electrode 7.

Dummy electrodes 6 ₁ , 6 ₂ , 6 are arranged along the outer edge of the liquid crystal display device in the entire seal area, in the vicinity of the seal area boundary (outer edge side) of the non-display area, and in the vicinity of the seal area boundary (inner edge side) of the outside seal area. ₃ are connected to dummy electrode connection patterns 8 ₃ , 8 ₁ , 8 ₆ , 8 ₂ , and 8 ₄ . Also connected to the dummy electrodes, further connecting the dummy electrodes 6 _1, 6 _2, 6 ₃ perpendicular to the outer edge of the liquid crystal display device, the dummy electrode connection pattern 8 ₅ are provided. At the same time when the pixel electrode is formed, it is formed by a wiring having a width of 3.0 μm and made of the same material.

  With such a structure, the warpage of the substrate is suppressed, and even when warpage occurs, the warpage can be easily corrected by curing the sealing material while applying a uniform pressure during bonding. A substrate can be provided. As a result, a high-quality liquid crystal display device having a gap accuracy improved by 30% as compared with the prior art was realized. In addition, since the seal spreads along the dummy electrode connection pattern at the time of bonding, it can be formed with the minimum necessary seal width, and the area can be reduced by 10% compared to the conventional case. Further, since the dummy electrode connection pattern is formed over the entire seal region, it is possible to flexibly cope with the misalignment during the seal application, and the seal application failure can be reduced and the yield is improved by 2%. In addition, since the plurality of dummy electrode connection patterns are connected by wiring perpendicular to the outer edge of the liquid crystal display device, the moisture permeability of the seal region is improved and the seal drawing accuracy is also improved.

  In FIG. 7, the dummy electrode connection patterns arranged in the non-display area and the seal outer area connect the dummy electrodes on the outer edge side and the inner edge side to the respective areas, but this represents a concept. There is no limitation, and dummy electrodes in an arbitrary column may be connected.

  In the first to fourth embodiments described above, it is preferable that each dummy electrode connection pattern is formed of the same material as each dummy electrode because the dummy electrode and each dummy electrode connection pattern can be formed simultaneously. . However, each dummy electrode connection pattern may be formed of a material different from that of the dummy electrodes. In the first to fourth embodiments, the dummy electrode connection patterns connect the centers of the dummy electrodes, but may be connected off the center as shown in FIG.

(Fifth embodiment)
FIG. 8 is a plan view showing a mounting form in which a circuit board is connected to the flexible printed wiring board of the liquid crystal display device of this embodiment, and FIG. 9 is a cross-sectional view showing a curved state of the flexible printed wiring board.

  8 and 9, reference numeral 301 denotes a liquid crystal display device, 302 denotes a terminal extraction portion of the liquid crystal display device, 303 denotes wire bonding, and 304 denotes a flexible printed wiring board, which is the same as the liquid crystal display device shown in FIGS. It is a simple configuration. 305 is a circuit board, 306 and 307 are control ICs for driving the liquid crystal display device, and 308 is a connector.

  A liquid crystal projector using the liquid crystal display device according to the first, second, or fourth embodiment described above will be described with reference to FIG.

  FIG. 10 shows an example of a liquid crystal projector device. Reference numeral 101 denotes a lamp, 102 a reflector, 103 a rod integrator, 104 a collimator lens, 105 a polarization conversion system, 106 a relay lens, and 107 a dichroic mirror. Reference numeral 108 denotes a polarizing beam splitter, 109 denotes a cross prism, 110 denotes a liquid crystal panel, 111 denotes a projection lens, and 112 denotes a total reflection mirror. The liquid crystal panel 110 uses the liquid crystal display device of the first, second, or fourth embodiment.

  The light beam emitted from the lamp 101 is reflected by the reflector 102 and condensed at the entrance of the integrator 103. The reflector 103 is an elliptical reflector, and its focal point exists at the light emitting portion and the integrator entrance. The light beam entering the integrator 103 is reflected 0 to several times inside the integrator, and forms a secondary light source image at the integrator outlet. As a secondary light source formation method, there is a method using a fly eye, but it is omitted here. The light beam from the secondary light source is substantially collimated through the collimator lens 104 and enters the polarization beam splitter 105 of the polarization conversion system. The P wave is reflected by the polarization beam splitter 105, passes through the λ / 2 plate and becomes an S wave, and all of the P wave becomes an S wave and enters the relay lens 106. The luminous flux is condensed on the panel by the relay lens 106. While the light is focused on the panel, a color separation dichroic mirror 107, a polarizing plate (not shown), a polarizing beam splitter 108, a cross prism 109, etc. constitute a color separation system, and S waves are respectively transmitted to three liquid crystal panels 110. Incident. In the liquid crystal panel 110, the liquid crystal shutter controls the voltage for each pixel in accordance with the image. In general, the S wave is modulated into elliptically polarized light (or linearly polarized light) by the action of the liquid crystal, the P wave component is transmitted by the polarizing beam splitter 108, color-combined by the cross prism 109, and then projected from the projection lens 111. .

  The liquid crystal projector device of the present embodiment can be configured in a liquid crystal projector that is installed in a housing and projects image light onto a wall, a dedicated screen, or the like.

  Further, the liquid crystal projector device of this embodiment can be used for a rear projection device such as a rear projection television. As shown in FIG. 11, the liquid crystal projector device according to the present embodiment is arranged in a housing together with a reflection mirror 211, a Fresnel lens 212 serving as a screen, and a lenticular lens 213. With such an arrangement, a rear projection apparatus such as a rear projection television can be configured. In FIG. 11, only the projection lens is shown as the liquid crystal projector apparatus, and other components are omitted.

  As shown in FIG. 11, light from the projection lens 111 of the liquid crystal projector device is reflected by the reflection mirror 211 and projected onto the back of the screen, converted into parallel light by the Fresnel lens 212, and scattered through a lenticular lens 213 at a wide angle. . The light from the projection lens 111 may be projected on the back of the screen without passing through the reflection mirror.

  Therefore, the liquid crystal projector device of this embodiment can be used for both the front projection system and the rear projection system. Here, the front projection method refers to a method in which image light is projected onto a wall or a dedicated screen, and the rear projection method refers to a method in which image light is projected onto the back of the screen and the transmitted light through the screen is observed.

  In each of the embodiments described above, the counter electrode is described as a transparent electrode. However, a portion of the counter electrode that does not affect image display is an opaque electrode such as a metal electrode or an electrode having a lower transmittance than the transparent electrode. There may be.

  In each of the embodiments described above, the reflective liquid crystal display device and the liquid crystal projector device using the reflective liquid crystal display device have been described. However, the present invention is a transmissive liquid crystal display device and a liquid crystal projector using the transmissive liquid crystal display device. It can also be applied to devices.

  Furthermore, the liquid crystal display device of the present invention is not limited to a liquid crystal projector device or a rear projection device. That is, the liquid crystal display device of the present invention is used in various electronic devices using the liquid crystal display device, for example, viewfinders of electronic devices including mobile phones, mobile computers, portable digital music players, digital cameras, digital video cameras, etc. Can be used.

  The present invention is used in electro-optical devices and electronic devices that use liquid crystal molecules as electro-optical materials. For example, the present invention can be used for a viewfinder, a projector, a rear projection television of an electronic device such as a mobile phone, a mobile computer, a portable digital music player, a digital camera, and a digital video camera.

It is a figure which shows the liquid crystal display device of the 1st Embodiment of this invention. It is a conceptual diagram of the curvature of the liquid crystal display device before and behind bonding by the curvature of a board | substrate. It is a conceptual diagram of the sealing material application failure between the conventional dummy electrodes. It is a conceptual diagram of the sealing material application defect between the dummy electrodes of this invention. It is a figure which shows the liquid crystal display device of the 2nd Embodiment of this invention. It is a figure which shows the liquid crystal display device of the 3rd Embodiment of this invention. It is a figure which shows the liquid crystal display device of the 4th Embodiment of this invention. It is a top view which shows the mounting form which connected the circuit board to the flexible printed wiring board of the liquid crystal display device of the 5th Embodiment of this invention. It is sectional drawing which shows the state which curved the flexible printed wiring board. It is a figure which shows an example of a liquid crystal projector device. It is a figure which shows an example of a rear projection apparatus. It is a figure which shows the other example of the connection of a dummy electrode connection pattern.

Explanation of symbols

1 liquid crystal display device 2 display area 3 non-display region 4 the sealing region 5 seal outside region 6 ₁ -6 _{3, 26} 1 -26 ₃ dummy electrode 7 reflective electrodes (pixel electrodes)
Remainder of 8,8 ₁ -8 _{6, 28} 1 -28 ₅ dummy electrode connection pattern 9 spacer 10 opposing the substrate 11 active matrix substrate 12 sealant 13 small area 108 warpage larger region 107 warp of the light transmitting electrode 17 gap 106 warp Area 201 Seal application failure 202 Moisture inflow path 203 Moisture inflow path blocking area

Claims (17)

A first substrate having a display area in which a plurality of pixel electrodes arranged two-dimensionally are disposed;
A second substrate having a light transmissive electrode provided to face at least the pixel electrode;
A sealing material that is disposed so as to surround the display area of the first substrate, and bonds the first substrate and the second substrate;
A liquid crystal display device comprising: a liquid crystal disposed in a region surrounded by the sealant between the first substrate and the second substrate;
A plurality of dummy electrodes having the same or similar shape as the pixel electrode are disposed in a sealing region where the sealing material of the first substrate is disposed,
The plurality of dummy electrodes at the inner edge of the seal region are connected along the circumferential direction of the inner edge of the seal region by a connecting member thinner than the width of the dummy electrode ,
The liquid crystal display device , wherein the plurality of dummy electrodes are connected in a direction perpendicular to a circumferential direction of the seal region by a connecting member thinner than the dummy electrodes .   The plurality of dummy electrodes at the outer edge of the seal region are connected along the circumferential direction of the outer edge of the seal region by a connecting member that is narrower than the width of the dummy electrode. Liquid crystal display device. The first substrate has a non-display area between the seal area and the display area, and includes a plurality of second dummy electrodes having the same or similar shape as the pixel electrode in the non-display area,
The plurality of second dummy electrodes at least at the outer edge of the non-display area are connected along the circumferential direction of the outer edge of the non-display area by a connecting member thinner than the width of the second dummy electrode. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is a liquid crystal display device. The first substrate has a seal outer region outside the seal region, and includes a plurality of third dummy electrodes having the same or similar shape as the pixel electrode in the seal outer region,
The plurality of third dummy electrodes at least at the inner edge of the outer area of the seal are connected along the circumferential direction of the inner edge of the outer area of the seal by a connecting member that is narrower than the width of the third dummy electrode. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is a liquid crystal display device.   The liquid crystal display device according to claim 1, wherein the first substrate is a semiconductor substrate, and the pixel electrode is a reflective electrode.   The plurality of dummy electrodes and the plurality of second dummy electrodes are connected to a direction perpendicular to the circumferential direction of the seal region and an outer edge of the non-display region by a connecting member that is thinner than the dummy electrode and the second dummy electrode. The liquid crystal display device according to claim 3, wherein the liquid crystal display device is connected in a direction perpendicular to the circumferential direction.   The plurality of dummy electrodes and the plurality of third dummy electrodes are formed by connecting members thinner than the dummy electrodes and the third dummy electrodes in a direction perpendicular to the circumferential direction of the seal region and an inner edge of the seal outer region. The liquid crystal display device according to claim 4, wherein the liquid crystal display device is connected in a direction perpendicular to the circumferential direction. Coupling member according to any one of claims 1 to 7, the dummy electrode, any one of claims 1 to 7, characterized in that it consists of the second dummy electrode or the third dummy electrodes of the same material A liquid crystal display device according to 1. A liquid crystal display device according to any one of claims 1 to 8, a liquid crystal projector having a light source emitting light to the liquid crystal display device, and a projection lens for projecting the image light from the liquid crystal display device. A rear projection device comprising: the liquid crystal projector device according to claim 9 ; and a screen for projecting image light from the liquid crystal projector device to a back surface. A plurality of pixel electrodes arranged two-dimensionally in the display area;
A plurality of dummy electrodes having the same or similar shape as the pixel electrode, provided in a seal region that is disposed so as to surround the periphery of the display region and in which a sealing material is disposed;
The plurality of dummy electrodes at the inner edge of the seal region are connected along the circumferential direction of the inner edge of the seal region by a connecting member thinner than the width of the dummy electrode ,
The active matrix substrate , wherein the plurality of dummy electrodes are connected in a direction perpendicular to a circumferential direction of the seal region by a connecting member thinner than the dummy electrodes . A plurality of said dummy electrodes of the outer edge of the seal area, by a thin connecting member than the width of the dummy electrode, as claimed in claim 11, characterized in that it is connected along the circumferential direction of the outer edge of the seal area Active matrix substrate. A non-display area is provided between the seal area and the display area, and the non-display area includes a plurality of second dummy electrodes having the same or similar shape as the pixel electrode,
The plurality of second dummy electrodes at least at the outer edge of the non-display area are connected along the circumferential direction of the outer edge of the non-display area by a connecting member thinner than the width of the second dummy electrode. The active matrix substrate according to claim 11 or 12 , characterized in that: A seal outer region outside the seal region, and a plurality of third dummy electrodes having the same or similar shape as the pixel electrode in the seal outer region;
The plurality of third dummy electrodes at least at the inner edge of the outer area of the seal are connected along the circumferential direction of the inner edge of the outer area of the seal by a connecting member that is narrower than the width of the third dummy electrode. the active matrix substrate according to any one of claims 11 to 13, characterized. The plurality of dummy electrodes and the plurality of second dummy electrodes are connected to a direction perpendicular to the circumferential direction of the seal region and an outer edge of the non-display region by a connecting member that is thinner than the dummy electrode and the second dummy electrode. The active matrix substrate according to claim 13 , wherein the active matrix substrate is connected in a direction perpendicular to the circumferential direction. The plurality of dummy electrodes and the plurality of third dummy electrodes are formed by connecting members thinner than the dummy electrodes and the third dummy electrodes in a direction perpendicular to the circumferential direction of the seal region and an inner edge of the seal outer region. The active matrix substrate according to claim 14 , wherein the active matrix substrate is connected in a direction perpendicular to the circumferential direction. Coupling member according to any of claims 11 16, wherein the dummy electrode, claim 11 16, characterized in that it consists of the second dummy electrode or the third dummy electrodes of the same material An active matrix substrate as described in 1.