Electro-optical device and electronic apparatus

Abstract

To prevent impurities from returning to a display area even when power is cut off.SOLUTION: An element substrate 12 of an electro-optical device includes: base parts 137 that are provided, in plan view, in a non-display area A3 between a display area A1 and a sealant; middle parts 134 and upper parts 133e that are respectively provided on the base parts 137; and shield electrodes 133f that are provided on the element substrate 12, in plan view, while avoiding the base parts 137, and are respectively not in contact with the middle parts 134 and upper parts 133e. A portion of the middle part 134 and a portion of the upper part 133e have, in cross-sectional view, an overhanging structure overhanging from the base part 137.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to an electro-optical device and an electronic device. [Background technology]

[0002] In electro-optical devices such as liquid crystal display devices that display images, it is known that the liquid crystal layer undergoes a photochemical reaction when exposed to light, resulting in degradation products. It is also known that ions leak into the liquid crystal layer from the sealing material that seals the liquid crystal layer. In electro-optical devices applied to projection display devices that display large screens, the luminous flux density of incident light is higher than that of direct-view types, but the pixel size of the electro-optical device is relatively small, so charged impurities such as degradation products and ions are likely to have a negative effect on the display. For this reason, a technique has been proposed in which impurities are moved from the display area to the non-display area by applying AC signals with different phases to electrodes provided in the non-display area (see, for example, Patent Publication 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-78792 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above technique has a problem in that when the power supply to the electro-optical device is cut off, the impurities that have moved to the non-display area return to the display area, degrading the display quality. [Means for solving the problem]

[0005] In order to solve the above problem, an electro-optical device according to one aspect of the present disclosure includes a first substrate and a second substrate that are arranged opposite each other and bonded together via a sealant; a liquid crystal layer sandwiched between the first substrate and the second substrate; pixel electrodes provided on the second substrate side of the first substrate in a display region of the first substrate; a counter electrode provided on the first substrate side of the second substrate so as to face the pixel electrodes; and a pixel electrode on the second substrate side of the first substrate in a non-display region between the display region and the sealant in a plan view. a first electrode provided on the second substrate side of the base; and a second electrode provided on the second substrate side of the first substrate in a position in the non-display area that does not overlap with the base in a planar view, electrically insulated from the first electrode, and to which a first potential is applied, wherein a portion of the first electrode protrudes from the base in a cross-sectional view, and in a normal direction to the first substrate, the surface of the first electrode protruding from the base on the first substrate side is located closer to the second substrate than the surface of the second electrode on the second substrate side. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is a plan view illustrating a configuration of a liquid crystal display device according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the liquid crystal display device taken along line Bb in FIG. [Figure 3] FIG. 1 is a diagram showing an equivalent circuit of a pixel circuit in a liquid crystal display device. [Figure 4] 1A and 1B are diagrams showing potentials of data signals etc. in a liquid crystal display device. [Figure 5] FIG. 2 is a plan view showing a configuration of a main part of an element substrate in a liquid crystal display device. [Figure 6] FIG. 2 is a plan view showing a configuration of a main part of an element substrate in a liquid crystal display device. [Figure 7] 6 is a partial cross-sectional view showing the main configuration of an element substrate in the liquid crystal display device, taken along line Cc in FIG. 5. [Figure 8] 1A to 1C are diagrams showing a simplified manufacturing process of a liquid crystal display device. [Figure 9]1A to 1C are diagrams showing a simplified manufacturing process of a liquid crystal display device. [Figure 10] FIG. 1 is a diagram showing the capture of ionic impurities in a liquid crystal display device. [Figure 11] FIG. 10 is a partial cross-sectional view showing the configuration of a main part of an element substrate in a liquid crystal display device according to a second embodiment. [Figure 12] FIG. 1 is a diagram showing the capture of ionic impurities in a liquid crystal display device. [Figure 13] FIG. 1 is a diagram showing a projection display device to which a liquid crystal display device is applied. [Figure 14] 10A and 10B are diagrams illustrating the capture of ionic impurities in a liquid crystal display device according to a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0007] Hereinafter, electro-optical devices according to embodiments will be described using a liquid crystal display device as an example. In the following drawings, the dimensions and scale of each part are appropriately different from those of the actual device. Furthermore, the embodiments described below are preferred specific examples, and therefore various technically preferable limitations are applied. However, the scope of the present disclosure is not limited to these embodiments unless otherwise specified in the following description to the effect that the present disclosure is limited.

[0008] Fig. 1 is a plan view showing the configuration of a liquid crystal display device 10 according to a first embodiment, and Fig. 2 is a cross-sectional view of the liquid crystal display device 10 taken along line Bb in Fig. 1. As shown in Fig. 2, the liquid crystal display device 10 has an element substrate 12 and a counter substrate 15 bonded together by a sealant 16 while maintaining a substantially constant cell thickness. The element substrate 12 and the counter substrate 15 are each made of a light-transmitting, insulating base material such as glass or quartz.

[0009] A plurality of pixel electrodes 120 are provided on the surface of the element substrate 12 facing the counter substrate 15. The plurality of pixel electrodes 120 are arranged in a matrix along the X and Y directions in a plan view as shown in Fig. 1. The region in which the plurality of pixel electrodes 120 are arranged in a plan view is a display region A1. The X direction refers to the longitudinal direction of the rectangular display area A1, and is the direction in which scanning lines (described later) extend. The Y direction refers to the lateral direction of the rectangular display area A1, and is the direction in which data lines (described later) extend. A planar view refers to a view from one of the element substrate 12 and the counter substrate 15 toward the other. Specifically, a planar view of the element substrate 12 refers to a view from the counter substrate 15. A counter electrode 150 is provided on the surface of the counter substrate 15 facing the element substrate 12 .

[0010] The liquid crystal layer 140 is a layer in which liquid crystal is sandwiched between the element substrate 12 and the counter substrate 15. The liquid crystal layer 140 is filled with liquid crystal in which the long axis direction of the liquid crystal molecules is aligned perpendicular to the substrate surface when no voltage is applied, such as in a VA (Vertical Alignment) mode.

[0011] 3 is a diagram showing an equivalent circuit of a pixel circuit in the display area A1. As shown in the diagram, pixel circuits 110 are provided corresponding to intersections of multiple scanning lines 112 extending in the X direction and multiple data lines 114 extending in the Y direction. The pixel circuits 110 include a transistor 116 and a liquid crystal element L. The transistor 116 is, for example, an N-channel thin film transistor. In the pixel circuit 110, a gate node of the transistor 116 is connected to the scanning line 112, a source node thereof is connected to the data line 114, and a drain node thereof is connected to a pixel electrode 120.

[0012] In this description, "connection" means a direct or indirect connection or coupling between two or more elements, and includes, for example, coupling between two or more elements on a substrate via different wiring layers and contact holes, even if the elements are not directly connected to each other.

[0013] The counter electrode 150 facing the pixel electrode 120 is maintained at a substantially constant potential LCcom over time. A liquid crystal layer 140 is sandwiched between the pixel electrode 120 and the counter electrode 150. Therefore, for each pixel circuit 110, the pixel electrode 120, the counter electrode 150, and the liquid crystal layer 140 form a liquid crystal element L. A storage capacitor 109 is provided electrically in parallel with the liquid crystal element L. One end of the storage capacitor 109 is connected to the pixel electrode 120, and the other end is connected to a capacitance line 107. The capacitance line 107 is maintained at a constant potential over time, for example, the same potential LCcom as that of the counter electrode 150.

[0014] The element substrate 12 is provided with a scanning line driving circuit that supplies scanning signals to the scanning lines 112, a data signal output circuit that outputs data signals to the data lines 114, and the like, but these are not shown in the figure. The element substrate 12 is also provided with a plurality of terminals N for inputting various signals to the scanning line driving circuit and the data signal output circuit, as shown in FIG.

[0015] The scanning line driving circuit sequentially and exclusively selects one by one of the multiple scanning lines 112 during one frame period, and sets the scanning signal of the selected scanning line 112 to H level. The data signal output circuit outputs a data signal of a potential corresponding to the gradation via the data line 114 to the pixel circuit 110 located on the scanning line 112 selected by the scanning line driving circuit. In the pixel circuit 110 corresponding to the scanning line 112 when the scanning signal becomes H level, the transistor 116 is turned on, and the data signal is applied to the pixel electrode 120 via the data line 114. Even when the scanning signal becomes L level and the transistor 116 is turned off, the data signal is maintained by the capacitance of the liquid crystal element L and the storage capacitor 109.

[0016] As is well known, in the liquid crystal element L, the orientation of the liquid crystal molecules changes in response to the electric field generated by the pixel electrode 120 and the counter electrode 150. Therefore, the liquid crystal element L has a transmittance that corresponds to the effective value of the applied voltage. This operation is also performed in the pixel circuits 110 located on the selected scanning line 112, and further, by sequentially and exclusively selecting the scanning lines 112 in one frame period, all the liquid crystal elements L in the display area A1 have transmittance according to the gradation, thereby generating an image in one frame period. In this embodiment, the transmittance is minimum when the voltage applied to the liquid crystal element L is zero, and the transmittance increases as the applied voltage increases, which is a normally black mode.

[0017] The liquid crystal element L is generally driven by AC. Specifically, the potential of the data signal is applied by alternately switching between a high-level positive potential and a low-level negative potential, for example, every period of one frame (V), based on the potential LCcom of the counter electrode 150.

[0018] FIG. 4 is a diagram showing the range of potentials that a data signal can take. The range that the positive polarity potential can take is indicated by Rng(+). The range Rng(+) is, for example, from the potential Vwt(+) when the gradation is at its highest value to the potential Vbk(+) when the gradation is at its lowest value. The range that the negative polarity potential can take is indicated by Rng(-). The range Rng(-) is, for example, from the potential Vwt(-) when the gradation is at its highest value to the potential Vbk(-) when the gradation is at its lowest value.

[0019] 1 and 2, non-display areas A2 and A3 are outside display area A1 and are areas inside sealant 16 in a plan view. Non-display areas A2 and A3 have a frame shape that surrounds display area A1 in order in a plan view. That is, non-display area A2 surrounds display area A1, and non-display area A3 surrounds non-display area A2 in a plan view. The non-display area A2 is provided with a dummy pixel electrode 122, and the non-display area A3 is provided with an upper portion 133e of the columnar body. As will be described later, the pixel electrode 120, the dummy pixel electrode 122, and the upper portion 133e are made of a third wiring layer made of ITO (Indium Tin Oxide) formed in the same process.

[0020] In addition, in the non-display areas A2 and A3, for example, a light-shielding film is provided on the element substrate 12 and / or the counter substrate 15 in a plan view, and therefore these areas do not contribute to display. When the display area A1, where the pixel electrodes 120 are arranged, changes to an area where the pixel electrodes 120 are not present, the difference between the presence and absence of pixel electrodes may appear as a difference in display. For this reason, dummy pixel electrodes 122 are provided to make it difficult for the difference in display to appear. Furthermore, an alignment film for determining the alignment of liquid crystal molecules is provided on the surface of the element substrate 12 facing the counter substrate 15 and on the surface of the counter substrate 15 facing the element substrate 12, but is not shown in the drawing.

[0021] Fig. 5 is a plan view showing the configuration of the display area A1 and non-display areas A2 and A3 on the element substrate 12, particularly the arrangement of the pixel electrodes 120, dummy pixel electrodes 122, and upper portions 133e. Fig. 6 is a plan view showing the shield electrode 133f provided in the non-display area A3, and Fig. 7 is a cross-sectional view of a main part of the liquid crystal display device 10 taken along line Cc in Fig. 5.

[0022] The pixel electrode 120 in the display region A1 is connected to the drain node of the transistor 116 via a connection electrode 121 filled in the contact hole Ct1. The pixel electrode 120 has a substantially square shape in plan view. The dummy pixel electrode 122 in the non-display area A2 has the same configuration as the pixel electrode 120 in the display area A1, except for the connection destination. More specifically, the dummy pixel electrode 122 is connected to a separate wiring M3a, which is different from the drain node of the transistor 116, via a connection electrode 123 filled in the contact hole Ct2. In this embodiment, the wiring M3a is in a floating state, not electrically connected to any part. The upper portion 133e in the non-display area A3 is the uppermost element among the elements that make up the column 130. The shape of the upper portion 133e is approximately square, like the pixel electrode 120 and the dummy pixel electrode 122, but the length of one side is shorter than the length of one side of the pixel electrode 120 and the dummy pixel electrode 122. In the non-display area A3 of the element substrate 12, in addition to the pillars 130, a shield electrode 133f is provided.

[0023] As shown by hatching in FIG. 6, the shield electrode 133f is provided in the non-display area A3 in a region excluding the upper portion 133e in a planar view. In other words, the shield electrode 133f is provided in the non-display area A3 in a mesh shape extending in the X and Y directions in a planar view so as to surround the upper portion 133e. Although the shield electrode 133f appears to be in contact with the upper portion 133e in a planar view, in reality, it is not in contact due to a step described below. Furthermore, the shield electrode 133f is not in contact with the dummy pixel electrodes 122 in the non-display area A2. Note that, for example, a potential Vwt(-) corresponding to the maximum negative polarity grayscale is applied to the shield electrode 133f via wiring not shown.

[0024] 7 shows three insulating layers and three wiring layers that are close to the liquid crystal layer 140 among the multiple insulating layers provided on the element substrate 12. Note that the base material of the element substrate 12 is present below in FIG. 7. Also, the display region A1 is omitted in FIG.

[0025] Among the elements shown in Figure 7, in order to distinguish the insulating layers, they will be referred to as the first insulating layer, the second insulating layer, and the third insulating layer in order of proximity to the substrate, and in order to distinguish the wiring layers, they will be referred to as the first wiring layer, the second wiring layer, and the third wiring layer in order of proximity to the substrate. The first wiring layer is a metal wiring layer made of, for example, aluminum, and the second and third wiring layers are transparent and conductive alloy wiring layers made of, for example, ITO.

[0026] As shown in the figure, a first wiring layer is formed on insulating layer 125, which is a first insulating layer, and wiring M3a is provided by patterning the first wiring layer. Insulating layer 126, which is a second insulating layer, is provided to cover insulating layer 126 and wiring M3a. Furthermore, a third insulating layer is provided to cover insulating layer 126. The third insulating layer contains boron (B) and phosphorus (P) and is a moisture-proof layer for preventing moisture from penetrating into the liquid crystal layer 140. The third insulating layer is not patterned in the display area A1 and the non-display area A2 and serves as the insulating layer 127 as is, but is patterned in the non-display area A3 and serves as the bases 137 of the columns 130.

[0027] In the non-display area A2, a contact hole Ct2 opens the insulating layers 126 and 127. Note that a contact hole Ct1 is also provided in the display area A1 as shown in FIG. After the contact holes Ct1 and Ct2 are formed, the second wiring layer is deposited and patterned to become the connection electrode 121 in the display area A1, the connection electrode 123 in the non-display area A2, and the central portion 134 in the non-display area A3.

[0028] The middle portion 134 is patterned into a shape larger than the base portion 137 in a plan view, specifically into a shape that includes the base portion 137. As a result, a part of the middle portion 134 protrudes from the base portion 137 in a cross-sectional view, forming a so-called overhanging structure. Note that the cross-sectional view refers to a view of the substrate cut along the perpendicular direction to the substrate surface, i.e., the normal direction to the substrate surface of the first substrate.

[0029] After the middle portion 134 is formed, the third wiring layer is deposited. The deposited third wiring layer is patterned in the display area A1 and the non-display area A2, but is not patterned in the non-display area A3. Specifically, the third wiring layer is patterned to become pixel electrodes 120 in the display area A1 and dummy pixel electrodes 122 in the non-display area A2, but is not patterned in the non-display area A3, and is separated into upper portions 133e and shield electrodes 133f. This will be explained with reference to FIGS.

[0030] 8 and 9 are diagrams for simply explaining the formation of the upper portion 133e and the shield electrode 133f. 8, in the non-display area A3, a base 137 is provided by patterning the third insulating layer on the upper surface of the insulating layer 126. The thickness of the base 137, that is, the third insulating layer, is denoted by t1. Furthermore, the middle portion 134 is provided on the upper surface of the base portion 137 by patterning the second wiring layer.

[0031] Next, a third wiring layer is provided by film formation using an upward vapor deposition source in Fig. 9. The third wiring layer is deposited on the upper surface and side surfaces of the middle portion 134 and on exposed portions of the insulating layer 126 where the base portion 137 is not formed. Here, the film thickness of the third wiring layer is defined as t2. Because the middle portion 134 has an overhanging structure relative to the base portion 137, when the third wiring layer is formed using an evaporation source from above, the third wiring layer is not deposited on the exposed portion of the insulating layer 126 that is shaded by the middle portion 134. In other words, the third wiring layer is formed in a self-aligned manner on the exposed portion of the insulating layer 126 using the middle portion 134 as a mask.

[0032] Since the film thickness t1 of the base 137 is thicker than the film thickness t2 of the third wiring layer, the lower surface Us of the upper portion 133e that protrudes from the base 137 is located farther from the upper surface Ts of the shield electrode 133f made of the third wiring layer, with respect to the base material of the element substrate 12. In other words, as viewed from the counter substrate 15, the upper surface Ts is located closer than the shield electrode 133f. Therefore, the upper portion 133e is separated from the shield electrode 133f at the potential Vwt(-) and is in a floating state.

[0033] Before describing the effects of the liquid crystal display device 10 according to the first embodiment, the capture of impurities such as degraded materials and ions in a comparative example will be described.

[0034] 14 is a cross-sectional view of a main part of a liquid crystal display device according to a comparative example, showing a non-display area A2 in which dummy pixel electrodes 122 are provided in a plan view, and a region outside the non-display area A2, i.e., a region corresponding to the non-display area A3 in the first embodiment. In other words, FIG. 14 is a view showing a part corresponding to FIG. 7 in the first embodiment.

[0035] 14, in the comparative example, a shield electrode 133g made of the same layer as the dummy pixel electrode 122 is provided in an area outside the non-display area A2. As in the first embodiment, a potential Vwt(-) is applied to the shield electrode 133g via wiring (not shown). In the comparative example, while the power is on, that is, while a display operation is being performed, a potential LCcom is applied to the counter electrode 150 and a potential Vwt(-) is applied to the shield electrode 133g, so that an electric field is generated in the direction perpendicular to the substrate, that is, in the normal direction to the substrate.

[0036] Therefore, the degraded matter Pur1, which is a reaction product of the liquid crystal layer 140, etc., is attracted to the region where the electric field is generated and is adsorbed to the shield electrode 133f. In addition, the ions Pur2 that have leaked out from the sealant 16 are also adsorbed to the shield electrode 133g. When the power is turned off, that is, when the display operation is finished, no electric field is generated, so the adsorbed degraded matter Pur1 and ions Pur2 are released and return to the display area, which causes a decrease in display quality.

[0037] In contrast, the first embodiment differs from the comparative example in the following ways.

[0038] FIG. 10 is a cross-sectional view of a main part for explaining the capture of impurities in the liquid crystal display device 10 according to the first embodiment. In the first embodiment, during the period when the power is on, a potential LCcom is applied to the counter electrode 150 and a potential Vwt(-) is applied to the shield electrode 133f, so that an electric field is generated in the direction perpendicular to the substrate, which is the same as in the comparative example.

[0039] Degraded matter Pur1, which is a reaction product of the liquid crystal layer 140, etc., is attracted to the non-display area A3 where an electric field is generated, and is adsorbed to the shield electrode 133f. Also, the fact that ions Pur2 seeping out from the sealant 16 are adsorbed to the shield electrode 133f in the non-display area A3 is the same as in the comparative example.

[0040] However, in the first embodiment, even when the power is turned off, that is, when the display operation is finished and no electric field is generated, the adsorbed state of the degraded matter Pur1 and the ions Pur2 on the shield electrode 133f is maintained by the overhang of the middle portion 134 and the upper portion 133e relative to the base portion 137. This makes it possible to suppress a deterioration in display quality caused by the adsorbed degraded matter Pur1 and ions Pur2 moving to the non-display region A2 and further to the display region A1.

[0041] In the first embodiment, since the upper portion 133e is in a floating state, only a relatively weak electric field is generated between the counter electrode 150 and the shield electrode 133f in the non-display area A3 while the power is on. Therefore, it must be said that the force that attracts the degraded matter Pur1 and the ions Pur2 to the shield electrode 133f is relatively weak. Therefore, a second embodiment that improves on this point will be described.

[0042] FIG. 11 is a cross-sectional view of a main part of a liquid crystal display device 10 according to a second embodiment, and is a cutaway view taken along line Cc in FIG. 5, similar to FIG. As shown in this figure, in the second embodiment, in the non-display area A3, a wiring M3b is provided between the insulating layers 125 and 126 by patterning the first wiring layer. The wiring M3b is connected to, for example, the capacitance line 107. Therefore, the same potential LCcom as that of the counter electrode 150 is applied to the wiring M3b.

[0043] In the non-display area A3, the insulating layer 126 and the base 137 are opened to form contact holes Ct3 for each columnar body 30, exposing the wiring M3b. The middle portion 134 is formed by depositing and patterning a second wiring layer, as in the first embodiment. However, in the second embodiment, the middle portion 134 fills the contact holes Ct3 and connects to the wiring M3b. The third wiring layer becomes the upper portion 133e on the upper surface of the middle portion 134, and is deposited in a self-aligned manner on the exposed portion of the insulating layer 126 using the middle portion 134 as a mask to form the shield electrode 133f. In the second embodiment, the upper portion 133e and the middle portion 134 are connected to the wiring M3b via the contact hole Ct3. Therefore, the second embodiment is the same as the first embodiment in that the shield electrode 133f is at the potential Vwt(-), but differs from the first embodiment in that the upper portion 133e and the middle portion 134 are not floating but are at the potential LCcom.

[0044] FIG. 12 is a cross-sectional view of a main part for explaining the capture of impurities in the second embodiment. While the power supply is on, a potential LCcom is applied to the opposing electrode 150, but the potential LCcom is also applied to the upper portion 133e and the middle portion 134, so a stronger electric field is generated between the opposing electrode 150 and the shield electrode 133f to which the potential Vwt(-) is applied, compared to the first embodiment.

[0045] The degraded matter Pur1 is attracted from the non-display area A2 where no electric field is generated to the non-display area A3 where a strong electric field is generated, and is adsorbed to the shield electrode 133f. In addition, the ions Pur2 that have seeped out from the sealing material 16 are also attracted to the non-display area A3 where a strong electric field is generated, and are adsorbed to the shield electrode 133f. Even when the power is turned off, that is, when the display operation is finished and no electric field is generated, the degraded matter Pur1 and ions Pur2 adsorbed to the shield electrode 133f are maintained in an adsorbed state due to the overhang of the middle portion 134 and the upper portion 133e relative to the base portion 137. Therefore, also in the second embodiment, it is possible to suppress a deterioration in display quality caused by the adsorbed degraded matter Pur1 and ions Pur2 moving into the non-display region A2 and further into the display region A1.

[0046] In the second embodiment, the potential LCcom is applied to the upper portion 133e and the middle portion 134 via the wiring M3b. Since it is only necessary to generate an electric field between the upper portion 133e and the middle portion 134 and the shield electrode 133f, a potential different from the potential Vwt(-) of the shield electrode 133f may be applied to the upper portion 133e and the middle portion 134.

[0047] The element substrate 12 is an example of a "first substrate," the opposing substrate 15 is an example of a "second substrate," the upper portion 133e is an example of a "first electrode," the shield electrode is an example of a "second electrode," and the potential LCcom is an example of a "first potential."

[0048] Next, a projection display device will be described as an example of an electronic device that uses the liquid crystal display device 10 described in the embodiment. 13 is a diagram showing the optical configuration of a projection display device 200. As shown in the figure, the projection display device 200 includes liquid crystal display devices 10R, 10G, and 10B. A lamp unit 2102 consisting of a white light source such as a halogen lamp is provided inside the projection display device 200. Light emitted from this lamp unit 2102 is separated into three primary colors, red (R), green (G), and blue (B), by three mirrors 2106 and two dichroic mirrors 2108 arranged inside. Of these, the R light enters the liquid crystal display device 10R, the G light enters the liquid crystal display device 10G, and the B light enters the liquid crystal display device 10B.

[0049] The optical path of B is longer than that of the other colors, red and green. Therefore, to prevent loss in the optical path, the B light is guided to the liquid crystal display device 10B via a relay lens system 2121 consisting of an input lens 2122, a relay lens 2123, and an output lens 2124.

[0050] The liquid crystal display device 10R is driven based on a data signal corresponding to R to generate an R transmission image. Similarly, the liquid crystal display device 10G generates a G transmission image based on a data signal corresponding to G, and the liquid crystal display device 10B generates a B transmission image based on a data signal corresponding to B.

[0051] The color transmission images generated by the liquid crystal display devices 10R, 10G, and 10B are incident on the dichroic prism 2112 from three directions. The dichroic prism 2112 refracts the R and B light at 90 degrees, while the G light travels straight. Therefore, after the color images are combined, a color image is projected onto the screen Scr by the projection lens 2114.

[0052] In addition, electronic devices including electro-optical devices such as the liquid crystal display device 10 can be applied not only to the projection display device 200, but also to head-mounted displays, electronic viewfinders in video cameras and interchangeable lens digital cameras, smart watches, and display units of wearable devices.

[0053] From the above-described embodiments, the following aspects can be understood, for example. Note that, in order to facilitate understanding of each aspect, reference numerals in the drawings are written in parentheses for convenience, but this is not intended to limit the aspects to those shown in the drawings.

[0054] An electro-optical device (10) according to one aspect 1 includes a first substrate (12) and a second substrate (15) that are arranged opposite each other and bonded together via a sealant (16), a liquid crystal layer (140) sandwiched between the first substrate (12) and the second substrate (15), pixel electrodes (120) provided on the second substrate (15) side of the first substrate (12) in a display region (A1) of the first substrate (12), a counter electrode (150) provided opposite the pixel electrodes (120) on the first substrate (12) side of the second substrate (15), and a base (137) provided in a part of a non-display region (A3) between the display region (A1) and the sealant (16) on the second substrate (15) side of the first substrate (12) in a plan view. , a first electrode (134, 133e) provided on the second substrate (15) side of the base (137), and a second electrode (133f) provided in a position in the non-display area (A3) on the second substrate (15) side of the first substrate (12) that does not overlap with the base (137) in a planar view, electrically insulated from the first electrode (134, 133e), and to which a first potential is applied, a portion of the first electrode (134, 133e) protruding from the base (137) in a cross-sectional view, and in the normal direction of the first substrate (15), the surface of the first electrode (134, 133e) protruding from the base (15) on the first substrate (12) side is positioned closer to the second substrate (15) than the surface of the second electrode (133f) on the second substrate (15) side.

[0055] In the electro-optical device according to the first aspect, impurities are adsorbed to the second electrode by an electric field generated by application of the first potential to the second electrode. Even when the electric field is eliminated by turning off the power, the first electrode protruding from the base prevents the impurities adsorbed to the second electrode from moving, thereby preventing degradation of display quality due to impurities.

[0056] In the electro-optical device (10) according to a specific aspect 2 of aspect 1, the first electrodes (134, 133e) are in an electrically floating state.

[0057] In the electro-optical device (10) according to a specific aspect 3 of aspect 1, a potential different from the first potential (LCcom) is applied to the first electrodes (134, 133e).

[0058] In the electro-optical device (10) according to a fourth specific aspect of the first aspect, the first electrodes (134, 133e) and the second electrodes (133f) are made of the same material.

[0059] In the electro-optical device (10) according to a fifth specific aspect of the fourth aspect, the first electrodes (134, 133e) and the second electrode (133f) are transparent.

[0060] An electro-optical device (10) according to a specific embodiment 6 of embodiment 1 has, in a planar view, a dummy pixel electrode (122) that is provided in an area (A2) between the display area (A1) and an area (A3) in which the second electrode (133f) is provided, and that has the same shape as the pixel electrode (120).

[0061] In an electro-optical device (10) according to a seventh specific aspect of the first aspect, the base (137) has insulating properties, and the second electrode (133e) surrounds the base (137) in a plan view.

[0062] An electronic device (200) according to an eighth aspect includes the electro-optical device (10) according to any one of the first to seventh aspects. [Explanation of symbols]

[0063] 10, 10R, 10G, 10B...liquid crystal display device, 12...element substrate, 14...counter substrate, 120...pixel electrode, 121...connection electrode, 122...dummy pixel electrode, 122...connection electrode, 130...columnar body, 133e...upper part, 134...middle part, 137...base part, 133f...shield electrode, 140...liquid crystal layer, 150...counter electrode, A1...display area, A2, A3...non-display area, 200...projector.

Claims

1. a first substrate and a second substrate that are arranged opposite each other and bonded together via a sealant; a liquid crystal layer sandwiched between the first substrate and the second substrate; a pixel electrode provided on the second substrate side of the first substrate in a display region of the first substrate; a counter electrode provided on the second substrate on the first substrate side so as to face the pixel electrode; a base provided in a part of a non-display area between the display area and the sealing material in a plan view on the second substrate side of the first substrate; a first electrode provided on the second substrate side of the base; a second electrode provided on the second substrate side of the first substrate at a position in the non-display area that does not overlap with the base portion in a plan view, the second electrode being electrically insulated from the first electrode and having a first potential applied thereto; Including, a portion of the first electrode protrudes from the base portion in a cross-sectional view; In a normal direction of the first substrate, a surface of the first electrode protruding from the base portion on the first substrate side is positioned closer to the second substrate than a surface of the second electrode on the second substrate side. Electro-optical device.

2. The first electrode is in an electrically floating state. The electro-optical device according to claim 1 .

3. The first electrode is applied with a potential different from the first potential. The electro-optical device according to claim 1 .

4. The first electrode and the second electrode are made of the same material. The electro-optical device according to claim 1 .

5. The first electrode and the second electrode are transparent.

5. The electro-optical device according to claim 4.

6. a dummy pixel electrode having the same shape as the pixel electrode, the dummy pixel electrode being provided in a region between the display region and a region in which the second electrode is provided in a plan view; The electro-optical device according to claim 1 .

7. the base portion has insulating properties, The second electrode surrounds the base in a plan view. The electro-optical device according to claim 1 .

8. 8. An electronic device comprising the electro-optical device according to claim 1.

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