Liquid crystal display devices and electronic equipment

Abstract

Taking into account the polarity of impurities generated in the display area of ​​the liquid crystal device, the impurities are removed from the display area. [Solution] The liquid crystal device of the embodiment comprises a common electrode to which a common potential is applied, a plurality of pixel electrodes to which a signal potential is applied and which are arranged in a display area, a first electrode to which a first potential with positive polarity relative to the common potential is applied and which is arranged in a part of the peripheral area surrounding the display area in a plan view, a second electrode to which a second potential with negative polarity relative to the common potential is applied and which is arranged in a part of the peripheral area in a plan view, and a liquid crystal layer arranged between each of the plurality of pixel electrodes and the common electrode, between the first electrode and the common electrode, and between the second electrode and the common electrode. In a plan view, the first electrode has a first part and a second part which is further from the display area than the first part. In a plan view, the second electrode is arranged between the display area and the second part.

Description

Technical Field

[0001] The present invention relates to a liquid crystal device and an electronic device.

Background Art

[0002] In a liquid crystal device, when illumination light is irradiated, a photochemical reaction occurs in the liquid crystal layer in the display region, and impurities composed of ionic substances may desorb from the vapor deposition film of the liquid crystal. The impurities desorbing from the vapor deposition film move within the display region along the oblique direction of the vapor deposition film obliquely deposited on the substrate, accumulate at the corners in the plan view of the display region, and may form display stains. The display quality of the liquid crystal device may deteriorate due to the impurities moving in the display region or accumulating at the corners of the display region.

[0003] Conventionally, measures have been studied to suppress a decrease in the display quality of a liquid crystal device and improve reliability by capturing impurities generated in the display region in a peripheral region outside the display region. For example, in the liquid crystal device disclosed in Patent Document 1, among the peripheral electrodes arranged in the peripheral region around the pixel region where a plurality of pixel electrodes are arranged, a fixed potential different from the counter electrode potential applied to the counter electrode is applied to the first peripheral electrode arranged in the peripheral region around the first corner located diagonally along the direction intersecting the uniaxial direction in the pixel region. In the liquid crystal device disclosed in Patent Document 1, a fixed potential smaller than the fixed potential applied to the first peripheral electrode may be applied to the second peripheral electrode arranged in the peripheral region around the second corner located diagonally along the uniaxial direction.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] As mentioned above, impurities generated in the display area consist of ionic substances and have been confirmed to include both positively polarized and negatively polarized impurities. In the liquid crystal apparatus disclosed in Patent Document 1, even when a fixed potential corresponding to either positively polarized or negatively polarized impurities is applied to the first and second peripheral electrodes, the amount of impurities generated in the display area that are captured is insufficient, making it difficult to suppress the deterioration of display quality and potentially reducing reliability. Therefore, measures are desired to remove impurities from the display area based on their polarity, thereby improving the display quality and reliability of the liquid crystal apparatus. [Means for solving the problem]

[0006] A liquid crystal device according to one aspect of the present disclosure includes a common electrode to which a common potential is applied, a plurality of pixel electrodes to which a signal potential is applied and which are arranged in a display area, a first electrode to which a first potential with positive polarity relative to the common potential is applied and which is arranged in a part of a peripheral area surrounding the display area in a plan view, a second electrode to which a second potential with negative polarity relative to the common potential is applied and which is arranged in a part of a peripheral area in a plan view, and a liquid crystal layer arranged between each of the plurality of pixel electrodes and the common electrode, between the first electrode and the common electrode, and between the second electrode and the common electrode. In a plan view, the first electrode has a first portion and a second portion which is further from the display area than the first portion. In a plan view, the second electrode is arranged between the display area and the second portion. [Brief explanation of the drawing]

[0007] [Figure 1] This is a plan view of the liquid crystal device of the first embodiment. [Figure 2] Figure 1 is a cross-sectional view of a liquid crystal device broken along line II-II. [Figure 3] Figure 1 is a cross-sectional view of a liquid crystal device fractured along line III-III. [Figure 4] Figure 1 is an equivalent circuit diagram of the pixel circuit in the pixel region of the liquid crystal device. [Figure 5] Figure 1 is an enlarged plan view of the region RV of the liquid crystal device. [Figure 6]This is a schematic diagram of the projector according to the first embodiment. [Figure 7] This is a plan view of the liquid crystal device according to the second embodiment. [Modes for carrying out the invention]

[0008] The following description will focus on a liquid crystal device as an example of an electro-optical device according to the embodiment. Note that the dimensions and scale of the parts in the following figures may differ from those of the actual device as appropriate. The embodiments described below are preferred examples. Unless otherwise specified in the following description, the scope of this disclosure is not limited to the embodiments described below.

[0009] [First Embodiment] First, a first embodiment of the present invention will be described with reference to Figures 1 to 5.

[0010] <LCD device> The liquid crystal device 10 of the first embodiment is an electro-optical device and liquid crystal display device equipped with liquid crystal elements that convert incident color light into image light. Figure 1 is a plan view of the liquid crystal device 10. Figure 2 is a cross-sectional view of the liquid crystal device 10 broken along line II-II in Figure 1. Figure 3 is a cross-sectional view of the liquid crystal device 10 broken along line III-III in Figure 1.

[0011] As shown in Figures 1 to 3, the liquid crystal apparatus 10 comprises a first substrate 112, a second substrate 115, a liquid crystal layer 140, and a sealing material 16. The first substrate 112 has an element substrate 12, a plurality of pixel electrodes 120, a plurality of dummy pixel electrodes 122, a first peripheral electrode 311, a second peripheral electrode 312, a plurality of terminals N, and an alignment film 331. The second substrate 115 has a counter substrate 15, a counter electrode 150, and an alignment film 332.

[0012] The element substrate 12 has a rectangular shape in plan view, for example, a rectangular shape, and has plate surfaces 12a and 12b. The opposing substrate 15 has a rectangular shape in plan view, for example, a rectangular shape, and has plate surfaces 15a and 15b. The longer sides of plate surfaces 15a and 15b of the opposing substrate 15 are the same length as the longer sides of plate surfaces 12a and 12b of the element substrate 12. The shorter sides of plate surfaces 15a and 15b of the opposing substrate 15 are shorter than the shorter sides of plate surfaces 12a and 12b of the element substrate 12.

[0013] In the following description and drawings, the X direction is one direction included in the surface 12a of the element substrate 12 and the surface 15a of the opposing substrate 15, for example, a direction parallel to the long side direction of the surface 12a and the surface 15a. One side along the X direction is described as the +X side, and the other side along the X direction is described as the -X side. The Y direction is one direction perpendicular to the X direction and included in the surface 12a of the element substrate 12 and the surface 15a of the opposing substrate 15, for example, a direction parallel to the short side direction of the surface 12a and the surface 15a. One side along the Y direction is described as the +Y side, and the other side along the Y direction is described as the -Y side. The Z direction is perpendicular to the X and Y directions and is parallel to the direction along the thickness of the element substrate 12 and the opposing substrate 15, for example. One side along the Z direction is described as the +Z side, and the other side along the Z direction is described as the -Z side. Planar view means viewing along the Z-direction.

[0014] The board surface 12b of the element substrate 12 is parallel to the XY plane, which includes the X and Y directions, and is the +Z side board surface of board surfaces 12a and 12b. A scanning line drive circuit, a data signal output circuit, and transistors that function as switching elements (not shown) are formed on the element substrate 12. In addition, a wiring layer 40 is formed on the board surface 12a of the element substrate 12. In the wiring layer 40, a first wiring layer 43, a first insulating layer 41, a first contact plug 45, a second insulating layer 42, a second wiring layer 44, and a second contact plug 46 are stacked in this order from the element substrate 12 side.

[0015] The plate surface 15b of the counter substrate 15 is parallel to the XY plane and is the -Z side plate surface among the plate surfaces 15a and 15b. In the liquid crystal device 10, the plate surface 12b of the element substrate 12 faces the plate surface 15b of the counter substrate 15 in the Z direction, and the first substrate 112 and the second substrate 115 are separated from each other with an appropriate interval. In the liquid crystal device 10, the first substrate 112 and the second substrate 115 are bonded together via a sealing material 16 so that the distance in the Z direction between the plate surface 12a of the element substrate 12 and the plate surface 15a of the counter substrate 15, that is, the overall thickness in the Z direction is substantially constant.

[0016] In plan view, the liquid crystal device 10 is partitioned into a pixel region A1 including the center in the XY plane, a dummy pixel region A2 surrounding the pixel region A1 and located outside the pixel region A1, and a peripheral region A3 surrounding the dummy pixel region A2 and located further outside the dummy pixel region A2. The pixel region A1 corresponds to the display region described later and the display region of the liquid crystal device described in the claims.

[0017] In plan view, the pixel region A1 has a rectangular shape, specifically a rectangular shape having a long side parallel to the X direction and a short side parallel to the Y direction. The dummy pixel region A2 and the peripheral region A3 are partitioned into a rectangular frame shape along with the rectangular shape of the pixel region A1.

[0018] A plurality of pixel electrodes 120, a plurality of dummy pixel electrodes 122, a first peripheral electrode 311, and a second peripheral electrode 312 are formed on the plate surface 12a of the element substrate 12. The plurality of pixel electrodes 120 are arranged in the pixel region A1 and are arranged in a matrix at appropriate intervals along the X direction and the Y direction in the pixel region A1.

[0019] The plurality of dummy pixel electrodes 122 are arranged in the dummy pixel region A2. The dummy pixel region A2 is partitioned into a frame shape in plan view. The plurality of dummy pixel electrodes 122 have the same shape and size as the plurality of pixel electrodes 120 in plan view and are arranged in a matrix at appropriate intervals along the X direction and the Y direction in the same manner as the plurality of pixel electrodes 120. In FIG. 1, the plurality of dummy pixel electrodes 122 are omitted.

[0020] In the liquid crystal device 10, since the dummy pixel region A2 is partitioned and a plurality of dummy pixel electrodes 122 are arranged in the dummy pixel region A2, there is no difference in the electrode structure and relative arrangement in the vicinity of the boundary between the pixel region A1 and the dummy pixel region A2, and the occurrence of display unevenness and the deterioration of display quality at the outer peripheral end portion in the plan view of the pixel region A1 are suppressed. In other words, if there are no plurality of dummy pixel electrodes 122 having the same shape and size in the plan view as the plurality of pixel electrodes 120 in the dummy pixel electrodes 122, the electrode structure and relative arrangement suddenly change in the vicinity of the boundary between the pixel region A1 and the dummy pixel region A2, and display unevenness may occur at the outer peripheral end portion in the plan view of the pixel region A1, or the display quality may deteriorate.

[0021] When the influence of the deterioration of the above-described display quality is small, the dummy pixel region A2 may be omitted, and the region corresponding to the dummy pixel region A2 may be included in the pixel region A1.

[0022] The first peripheral electrode 311 is arranged in a part of the peripheral region A3. The peripheral region A3 is partitioned in a frame shape in the plan view, and has a +Y-side region A31 parallel to the X direction, a +X-side region A32 parallel to the Y direction, a -Y-side region A33 parallel to the X direction, and a -X-side region A34 parallel to the Y direction. The first peripheral electrode 311 corresponds to the first electrode described later and the first electrode of the liquid crystal device described in the claims. The first peripheral electrode 311 is arranged, for example, so as to alternately change the position in the width direction of the peripheral region A3 between two positions different from each other at every desired length along the circumferential direction of the peripheral region A3.

[0023] The second peripheral electrode 312 is positioned in a portion of the peripheral region A3 that does not overlap with the area where the first peripheral electrode 311 is positioned. The second peripheral electrode 312 corresponds to the second electrode described later and the second electrode of the liquid crystal device described in the claims. The second peripheral electrode 312 is positioned, for example, along the circumferential direction of the peripheral region A3 at desired lengths, so as to alternately change its position in the width direction of the peripheral region A3 between two different positions. The relative arrangement of the first peripheral electrode 311 and the second peripheral electrode 312 will be described later.

[0024] The pixel electrode 120, dummy pixel electrode 122, first peripheral electrode 311, and second peripheral electrode 312 are made of a transparent conductive material that transmits visible wavelength color light L incident from the +Z side, and are composed of, for example, indium tin oxide (ITO) deposited using the same process.

[0025] The counter electrode 150 is formed over the entire surface 15b of the counter substrate 15. The counter electrode 150 is made of a transparent conductive material that corresponds to light incident from the +Z side, and is composed of, for example, ITO.

[0026] The first substrate 112 and the second substrate 115 are bonded together in the Z direction as described above, but the -Y side portion of the element substrate 12 of the first substrate 112 extends further to the -Y side than the opposing substrate 15. Multiple terminals N are formed on the board surface 12b of the element substrate 12 that extends further to the -Y side than the opposing substrate 15. Multiple terminals N input various electrical signals to the scan line drive circuit and the data signal output circuit.

[0027] The alignment films 331 and 332 are positioned in the pixel region A1, the dummy pixel region A2, and the peripheral region A3 on the inner side of the sealing material 16 in a plan view. The alignment film 331 covers each of the multiple pixel electrodes 120, the multiple dummy pixel electrodes 122, the first peripheral electrode 311, the second peripheral electrode 312, and the plate surface 12b of the element substrate 12 where no electrodes are formed, from the +Z side. The +Z side surface of the alignment film 331 is parallel to the XY plane and is substantially flat.

[0028] The alignment film 332 is formed on the -Z side surface of the counter electrode 150 and covers the counter electrode 150 from the -Z side. The -Z side surface of the alignment film 332 is parallel to the XY plane and is substantially flat. The alignment films 331 and 332 determine the orientation of the liquid crystal molecules contained in the liquid crystal layer 140, for example, by slightly tilting them with a slight angle to the Z direction when no voltage is applied.

[0029] Note that the dummy pixel area A2 and the surrounding area A3 do not contribute to image display. For example, a light-shielding film (not shown) may be formed on the surface 15a of the substrate 15 opposite the dummy pixel area A2 and the surrounding area A3.

[0030] The liquid crystal layer 140 is positioned in the Z direction between the plate surface 12a of the element substrate 12 and the plate surface 15a of the opposing substrate 15, and is interposed between each of the multiple pixel electrodes 120, multiple dummy pixel electrodes 122, the first peripheral electrode 311 and the second peripheral electrode 312 and the opposing electrode 150. Specifically, the liquid crystal layer 140 is sandwiched between the alignment films 331 and 332 in the Z direction.

[0031] The liquid crystal layer 140 is surrounded by the sealing material 16 in a plan view and sealed by the sealing material 16 in the XY plane. The liquid crystal layer 140 is a layer made of liquid crystal molecules whose long axis is approximately parallel to the Z direction when no voltage is applied, such as in the VA (Vertical Alignment) method.

[0032] The sealing material 16 is positioned in the peripheral region A3, at least outside the first peripheral electrode 311 and the second peripheral electrode 312, and preferably in the outermost peripheral region of the peripheral region A3.

[0033] Next, the relative arrangement of the first peripheral electrode 311 and the second peripheral electrode 312 in peripheral region A3 will be described.

[0034] As shown in Figures 1 to 3, the first peripheral electrode 311 is divided into a first electrode portion 351, a second electrode portion 352, and a third electrode portion 353. The first electrode portion 351 corresponds to the first portion described later and corresponds to the first portion of the first electrode in the liquid crystal device described in the claims. The second electrode portion 352 corresponds to the second portion described later and corresponds to the second portion of the first electrode in the liquid crystal device described in the claims. The third electrode portion 353 is omitted in Figure 1. The third electrode portion 353 corresponds to the third portion described later and corresponds to the third portion of the first electrode in the liquid crystal device described in the claims.

[0035] As described above, the electrode portions 351 and 352 of the first peripheral electrode 311 are arranged along the circumferential direction of the peripheral region A3 at desired lengths, alternating between two different positions in the width direction of the peripheral region A3, i.e., between the inner circumferential region and the outer circumferential region in a plan view. Electrode portion 351 is located in the inner circumferential region of the two regions of the peripheral region A3 in a plan view. Electrode portion 352 is located in the outer circumferential region of the two regions of the peripheral region A3 in a plan view. As will be described later, one end of electrode portion 351 in the longitudinal direction is connected to the other end of the adjacent electrode portion 352 in the longitudinal direction by electrode portion 353. In other words, the electrode portions 351, 352, and 353 of the first peripheral electrode 311 are connected in the circumferential direction of the peripheral region A3.

[0036] The second peripheral electrode 312 is divided into a first electrode portion 354 and a second electrode portion 355. The first electrode portion 354 corresponds to the fourth portion described later and corresponds to the fourth portion of the second electrode in the liquid crystal device described in the claims. The second electrode portion 355 corresponds to the fifth portion described later and corresponds to the fifth portion of the second electrode in the liquid crystal device described in the claims.

[0037] As described above, the electrode portions 354 and 355 of the second peripheral electrode 312 are arranged alternately between two different positions in the width direction of the peripheral region A3 at desired lengths along the circumferential direction of the peripheral region A3. Electrode portion 354, like electrode portion 351, is located in the inner circumferential region of the two aforementioned regions in the width direction of the peripheral region A3 in a plan view. Electrode portion 352, like electrode portion 355, is located in the outer circumferential region of the two aforementioned regions in the width direction of the peripheral region A3 in a plan view.

[0038] In a plan view, the inner region of peripheral region A3 is located at a distance d1 from the outermost pixel electrode 120 of pixel region A1. In other words, the minimum distance between the outer edge of the outermost pixel electrode 120 of pixel region A1 and the inner edge of the inner region of peripheral region A3 is distance d1. In the inner region of peripheral region A3, the electrode portion 351 of the first peripheral electrode 311 and the electrode portion 364 of the second peripheral electrode 312 are alternately arranged along the circumferential direction, separated by a fine liquid crystal layer 140 or an insulating layer which is omitted in Figure 1.

[0039] In a plan view, the outermost region of peripheral region A3 is located at a distance d2 from the outermost pixel electrode 120 of pixel region A1. That is, the minimum distance between the outermost edge of the outermost pixel electrode 120 of pixel region A1 and the innermost edge of the innermost region in the width direction of peripheral region A3 is distance d2. Distance d2 is longer than distance d1. In the outermost region of peripheral region A3, the electrode portion 352 of the first peripheral electrode 311 and the electrode portion 365 of the second peripheral electrode 312 are alternately arranged along the circumferential direction, separated by a fine liquid crystal layer 140 or an insulating layer which is omitted in Figure 1.

[0040] For example, in region A31 of peripheral region A3, the length direction corresponds to the X direction, and the width direction corresponds to the Y direction. In the inner peripheral region of region A31, the first electrode portion 351A of the first peripheral electrode 311, the first electrode portion 354A of the second peripheral electrode 312, the first electrode portion 351B, the electrode portion 354A, and the electrode portion 351A are arranged sequentially along the X direction from the -X end to the +X end. The length of electrode portion 351A in the X direction is longer than the length of electrode portion 354A in the X direction. The length of electrode portion 351B in the X direction is longer than the length of electrode portion 351A in the X direction.

[0041] In the outer region of area A31, the second electrode portion 355A of the second peripheral electrode 312, the second electrode portion 352A of the first peripheral electrode 311, the second electrode portion 355B, the electrode portion 352A, and the electrode portion 355A are sequentially arranged along the X direction from the -X end to the +X end. The length of electrode portion 355A in the X direction is longer than the length of electrode portion 352A in the X direction, and is slightly longer than the length of electrode portion 351A in the X direction due to its relationship with the corner of pixel region A1. The length of electrode portion 352A in the X direction is equivalent to the length of electrode portion 354A in the X direction. The length of electrode portion 355B in the X direction is equivalent to the length of electrode portion 351B in the X direction.

[0042] In region A32 of peripheral region A3, the length direction corresponds to the Y direction, and the width direction corresponds to the X direction. In the inner peripheral region of region A32, the first electrode portion 351C of the first peripheral electrode 311, the first electrode portion 354B of the second peripheral electrode 312, the first electrode portion 351D, and the first electrode portion 354C are sequentially arranged along the Y direction from the +Y end to the -Y end. The length of electrode portion 351C in the Y direction is longer than the length of electrode portion 354A in the X direction and the length of 354B in the Y direction, and is about the same as the length of electrode portion 351D in the Y direction. The length of electrode portion 354C in the Y direction is longer than the length of electrode portion 354B in the Y direction.

[0043] In the outer region of area A32, the second electrode portion 355C of the second peripheral electrode 312, the second electrode portion 352B of the first peripheral electrode 311, the second electrode portion 355D, and the second electrode portion 352C are sequentially arranged along the Y direction from the +Y end to the -Y end. The length of electrode portion 352C in the Y direction is longer than the length of electrode portion 355B in the Y direction, and slightly longer than the length of electrode portion 351C in the Y direction, due to its relationship with the corner of pixel region A1. The length of electrode portion 355B in the Y direction is equivalent to that of electrode portion 354B and is about the same as the length of electrode portion 352A in the Y direction. The length of electrode portion 355D in the Y direction is equivalent to that of electrode portion 351D. The length of electrode portion 355C in the Y direction is longer than the length of electrode portion 355B in the Y direction, and is slightly longer than the length of electrode portion 351C in the Y direction due to its relationship with the corner of pixel region A1.

[0044] In region A33 of peripheral region A3, the length direction corresponds to the X direction, and the width direction corresponds to the Y direction. In the inner peripheral region of region A33, the first electrode portion 354D of the second peripheral electrode 312, the first electrode portion 351E of the first peripheral electrode 311, the first electrode portion 354E, the electrode portion 351E, and the electrode portion 354D are sequentially arranged along the X direction from the +X end to the -X end. The length of electrode portion 354D in the X direction is longer than the length of electrode portion 351E in the X direction, and is about the same as the length of electrode portion 354C in the Y direction. The length of electrode portion 351E in the X direction is about the same as the respective lengths of electrode portions 351A and 354A in the X direction. The length of electrode portion 354E in the X direction is about the same as the respective lengths of electrode portions 351B and 354B in the X direction.

[0045] In the outer region of area A33, the second electrode portion 352D of the first peripheral electrode 311, the second electrode portion 355E of the second peripheral electrode 312, the second electrode portion 352E, the electrode portion 355E, and the electrode portion 352D are sequentially arranged along the X direction from the +X end to the -X end. The length of electrode portion 352D in the X direction is approximately the same as the length of electrode portion 352C in the Y direction. The length of electrode portion 355E in the X direction is equivalent to the length of electrode portion 351E in the X direction. The length of electrode portion 352E in the X direction is equivalent to the length of electrode portion 354E in the X direction.

[0046] In region A34 of peripheral region A3, the length direction corresponds to the Y direction, and the width direction corresponds to the X direction. In the inner peripheral region of region A34, the electrode portion 354C of the second peripheral electrode 312, the first electrode portion 351F of the first peripheral electrode 311, the first electrode portion 354F, and the electrode portion 351C are sequentially arranged along the Y direction from the -Y end to the +Y end. The length of electrode portion 351F in the Y direction is approximately the same as the length of electrode portion 354B in the Y direction. The length of electrode portion 354F in the Y direction is approximately the same as the length of electrode portion 351D in the Y direction.

[0047] In the outer region of area A34, the electrode portion 352C of the first peripheral electrode 311, the second electrode portion 355F of the second peripheral electrode 312, the second electrode portion 353F, and the electrode portion 355C are sequentially arranged along the Y direction from the -Y end to the +Y end. The length of electrode portion 355F in the Y direction is equivalent to the length of electrode portion 351F in the Y direction. The length of electrode portion 352F in the Y direction is equivalent to the length of electrode portion 354F in the Y direction.

[0048] In a plan view, the electrode portions 351A and 351C of the first electrode portion 351 of the first peripheral electrode 311 face the +X and +Y corners of the pixel region A1, and the -X and +Y corners of the pixel region A1. The +X end of electrode portion 351A, which is located on the +X side, and the +Y end of electrode portion 351C, which is located on the +X side, are connected to each other. The -X end of electrode portion 351A, which is located on the -X side, and the +Y end of electrode portion 351C, which is located on the -X side, are connected to each other.

[0049] In a plan view, the electrode portions 354C and 354D of the first electrode portion 354 of the second peripheral electrode 312 face the +X and -Y corners of the pixel region A1, and the -X and -Y corners of the pixel region A1. The -Y end of electrode portion 354C, which is located on the +X side, and the +X end of electrode portion 354D, which is located on the +X side, are connected to each other. The -Y end of electrode portion 354C, which is located on the -X side, and the -X end of electrode portion 354D, which is located on the -X side, are connected to each other.

[0050] Figure 4 is an equivalent circuit diagram of the pixel circuit 110 configured in pixel region A1. As shown in Figure 4, the pixel circuit 110 is provided corresponding to the intersection positions of a plurality of scan lines 113 extending in the X direction and a plurality of data lines 114 extending in the Y direction. The pixel circuit 110 includes a transistor 116 that functions as a switching element and a liquid crystal element 180.

[0051] Transistor 116 is, for example, an N-channel thin-film transistor (TFT). In the pixel circuit 110, the gate node of transistor 116 is connected to the scan line 113, the source node of transistor 116 is connected to the data line 114, and the drain node of transistor 116 is connected to the pixel electrode 120.

[0052] In this specification, “connection” means a direct or indirect connection or coupling between two or more elements. In this specification, “connected” includes, for example, a state in which two or more elements are linked together on a substrate, and a state in which they are coupled to each other via different conductive layers and contact plugs.

[0053] The counter electrode 150 faces a plurality of pixel electrodes 120 and is maintained at a substantially constant potential LCcom over time. A predetermined potential LCsig, different from the potential LCcom, is applied to each of the plurality of pixel electrodes 120. The potential LCcom corresponds to the common potential described later and the common potential in the liquid crystal device described in the claims. The potential LCsig corresponds to the signal potential described later and the signal potential in the liquid crystal device described in the claims. In each of the plurality of pixel circuits 110, a liquid crystal element 180 is composed of a pixel electrode 120, a counter electrode 150, and a liquid crystal layer 140.

[0054] A storage capacitor 109 is provided electrically in parallel with the liquid crystal element 180. One end of the storage capacitor 109 is connected to the pixel electrode 120, and the other end of the storage capacitor 109 is connected to the capacitance line 107. The capacitance line 107 is maintained at a constant potential over time, for example, at the same potential LCcom as the counter electrode 150.

[0055] The scan line drive circuit sequentially and exclusively selects one scan line 113 at a time during a single frame, and sets the scan signal of the selected scan line 113 to a relatively high H level. The data signal output circuit outputs a data signal with a potential corresponding to the grayscale to the pixel circuit 110 located on the scan line 113 selected by the scan line drive circuit, via the data line 114.

[0056] In the pixel circuit 110 corresponding to scan line 113 when the scanning signal reaches a high level, transistor 116 turns on, and the data signal is applied to the pixel electrode 120 via data line 114. Even when the scanning signal reaches a relatively low low level and transistor 116 turns off, the data signal is retained by the capacitive and storage capacitance 109 of the liquid crystal element 180.

[0057] In the liquid crystal element 180, the orientation of the liquid crystal molecules changes according to the electric field generated by the pixel electrode 120 and the counter electrode 150. The transmittance of the liquid crystal element 180 to the color light L incident on the liquid crystal element 180 changes according to the effective value of the voltage applied to the liquid crystal element 180.

[0058] The operations and behaviors described above are also performed in the pixel circuit 110 connected to the selected scan line 113. Due to the sequential and exclusive selection of scan lines 113 during one frame period, the transmittance of all liquid crystal elements 180 in the pixel region A1 changes according to the gradation. As a result, an image is generated during one frame period, and the color light L is converted into image light (not shown).

[0059] The liquid crystal element 180 operates, for example, in normally black mode. In normally black mode, the transmittance of the liquid crystal element 180 is lowest when the applied voltage to the liquid crystal element 180 is zero, and the transmittance of the liquid crystal element 180 increases as the applied voltage increases.

[0060] The liquid crystal element 180 is driven by either DC or AC. Specifically, when the liquid crystal element 180 is driven by AC, the potential of the data signal is a positive potential on the higher side or a negative potential on the lower side, relative to the potential LCcom of the counter electrode 150, and is switched alternately between a positive potential and a negative potential, for example, every frame period.

[0061] The first peripheral electrode 311 is maintained at a potential LC1 that is different from the potential LCcom of the counter electrode 150, at least while the scanning signal is at the H level. Potential LC1 has positive polarity with respect to potential LCcom, or a higher positive potential with respect to potential LCcom. Potential LC1 corresponds to the first potential described later, and corresponds to the first potential in the liquid crystal apparatus described in the claims. Potential LC1 is applied to the first peripheral electrode 311 from, for example, a common wiring (not shown) that is not electrically connected to the scan lines 113 and data lines 114, respectively, on the first substrate 112.

[0062] The second peripheral electrode 312 is maintained at a potential LC2 that is different from the potential LCcom of the counter electrode 150 and the potential LC1 of the first peripheral electrode 311, at least while the scanning signal is at the H level. Potential LC2 has negative polarity with respect to potential LCcom, or to a lower negative polarity potential with respect to potential LCcom. Potential LC2 corresponds to the second potential described later, and corresponds to the second potential in the liquid crystal apparatus described in the claims.

[0063] The potential LC2 is applied to the second peripheral electrode 312 from, for example, another common wiring that is not electrically connected to the scan line 113, data line 114, and the common wiring that applies the potential LC1 to the first peripheral electrode 311 on the first substrate 112.

[0064] As shown in Figure 2, the distance d1 between the inner peripheral region of peripheral region A3 and the pixel region A1 in a plan view corresponds to the distance between the first electrode portion 354D of the second peripheral electrode 312 and the pixel electrode 120. More precisely, the distance between the electrode portion 354D of the second peripheral electrode 312 and the pixel region A1 is the shortest distance in the XY plane between the inner peripheral end of the first electrode portion 354 of the second peripheral electrode 312, which includes the electrode portion 354D, and the outer peripheral end of one of the multiple pixel electrodes 120 that is positioned on the outer periphery and faces the first peripheral electrode 311.

[0065] Furthermore, as shown in Figure 2, the first insulating layer 41 has a first contact plug 45 for electrically connecting the first wiring layer 43 and the second wiring layer 44. The second insulating layer 42 has a second contact plug 46 for electrically connecting the second wiring layer 44 to the first peripheral electrode 311, the second wiring layer 44 to the second peripheral electrode 312, and the second wiring layer 44 to the pixel electrode 120. The first peripheral electrode 311 is electrically connected to terminal N via the first insulating layer 41, the second insulating layer 42, the first wiring layer 43, the second wiring layer 44, the first contact plug 45, and the second contact plug 46. The second peripheral electrode 312 is similarly electrically connected to terminal N via the first insulating layer 41, the second insulating layer 42, the first wiring layer 43, the second wiring layer 44, the first contact plug 45, and the second contact plug 46.

[0066] When an appropriate potential is applied to each electrode of the liquid crystal device 10, color light L is incident along the Z direction from the +Z side of the plate surface 15a of the opposing substrate 15 of the second substrate 115 of the pixel region A1, and as the conversion of color light L into image light proceeds, impurities IM and IP, which consist of ionic materials, are generated in the liquid crystal layer 140. The impurities IM consist of negatively polarized ionic materials. The impurities IM generated from the liquid crystal layer 140 of the pixel region A1 are captured by the positively polarized first peripheral electrode 311, and then, for example, by the second electrode portion 352F.

[0067] The impurity IP consists of a positively polarized ionic substance. The migration speed of the impurity IP in the XY plane is faster than the migration speed of the impurity IM in the XY plane. The impurity IP generated from the liquid crystal layer 140 of the pixel region A1 is captured by the negatively polarized second peripheral electrode 312, and then, for example, by the first electrode portion 354F.

[0068] As shown in Figure 3, the distance d2 between the outer peripheral region of peripheral region A3 and the pixel region A1 in a plan view corresponds to the distance between the second electrode portion 355F of the second peripheral electrode 312 and the pixel electrode 120. More precisely, the distance between the electrode portion 355F of the second peripheral electrode 312 and the pixel region A1 is the shortest distance in the XY plane between the inner peripheral end of the second peripheral electrode 312 and the outer peripheral end of one of the multiple pixel electrodes 120 that is positioned on the outer peripheral side and faces the second peripheral electrode 312.

[0069] The lengths of the first electrode portion 351 and the second electrode portion 352 of the first peripheral electrode 311, and the first electrode portion 354 and the second electrode portion 355 of the second peripheral electrode 312, in their respective peripheral regions A3, are appropriately set to match the direction and speed of movement of impurities IM and IP generated from the liquid crystal layer 140 in a plan view within the pixel region A1, as will be illustrated later. For example, it is assumed that impurities IM generated from the liquid crystal layer 140 tend to accumulate at the +X and +Y corners of the pixel region A1, and are actively captured by the electrode portions 351A and 351C located on the +X side.

[0070] The length in the X direction of the negative electrode portion 354A adjacent to the positive electrode portion 351A located on the +X side in the X direction is approximately 1 / 3 of the length in the X direction of the electrode portion 351A located on the +X side. Similarly, the length in the Y direction of the negative electrode portion 354B adjacent to the positive electrode portion 351C located on the +X side in the Y direction is approximately 1 / 3 of the length in the Y direction of the electrode portion 351C located on the +X side.

[0071] In the above case, it is assumed that impurities IM generated from the liquid crystal layer 140 tend to accumulate at the -X and +Y corners of the pixel region A1 and are captured by the electrode portions 351A and 351C located on the -X side. The length in the X direction of the negative electrode portion 354A adjacent to the positive electrode portion 351A located on the -X side in the X direction is about 1 / 3 of the length in the X direction of the electrode portion 351A located on the -X side. Similarly, the length in the Y direction of the negative electrode portion 354F adjacent to the positive electrode portion 351C located on the -X side in the Y direction is about 1 / 3 of the length in the Y direction of the electrode portion 351C located on the -X side.

[0072] For example, it is assumed that impurities IP generated from the liquid crystal layer 140 tend to accumulate in the pixel region A1 at the diagonally opposite corners on the -X and -Y sides to the +X and +Y sides in a plan view, and are actively captured by the electrode portions 354D and 354C located on the -X side. The length in the X direction of the positive electrode portion 351E adjacent to the negative electrode portion 354D located on the -X side in the X direction is about 1 / 3 of the length in the X direction of the electrode portion 354D located on the -X side. Similarly, the length in the Y direction of the positive electrode portion 351F adjacent to the negative electrode portion 354C located on the -X side in the Y direction is about 1 / 3 of the length in the Y direction of the electrode portion 354C located on the -X side.

[0073] For example, impurity IP generated from the liquid crystal layer 140 tends to accumulate at the -X and -Y corners of the pixel region A1, and is assumed to be actively captured by the electrode portions 354D and 354C located on the -X side. The length in the X direction of the positive electrode portion 351E adjacent to the negative electrode portion 354D located on the -X side in the X direction is approximately 1 / 3 of the length in the X direction of the electrode portion 354D located on the -X side. Similarly, the length in the Y direction of the positive electrode portion 351F adjacent to the negative electrode portion 354C located on the -X side in the Y direction is approximately 1 / 3 of the length in the Y direction of the electrode portion 354C located on the -X side.

[0074] In the above case, it is assumed that impurities IP generated from the liquid crystal layer 140 tend to accumulate at the +X and -Y corners of the pixel region A1 and are captured by the electrode portions 354D and 354C located on the +X side. The length in the X direction of the positive electrode portion 351E adjacent to the negative electrode portion 354D located on the +X side in the X direction is approximately 1 / 3 of the length in the X direction of the electrode portion 354D located on the +X side. Similarly, the length in the Y direction of the positive electrode portion 351D adjacent to the negative electrode portion 354C located on the +X side in the Y direction is approximately 1 / 3 of the length in the Y direction of the electrode portion 354C located on the +X side.

[0075] Figure 5 is an enlarged view of region RV shown in Figure 1. As shown in Figure 5, the size in the X direction, i.e., the width dimension, of the first electrode portion 351F of the first peripheral electrode 311 is larger in the X direction, i.e., the width dimension, of the first electrode portion 355F of the second peripheral electrode 312 that faces the electrode portion 351F in the X direction. The size in the X direction, i.e., the width dimension, of the first electrode portion 354C located on the -X side of the second peripheral electrode 312 is larger in the X direction, i.e., the width dimension, of the second electrode portion 352C of the first peripheral electrode 311 that faces the electrode portion 354C in the X direction.

[0076] In other words, in the width direction of the peripheral region A3, the first electrode portion 351 including the electrode portion 351F of the first peripheral electrode 311, and the first electrode portion 354 including the electrode portion 354C of the second peripheral electrode 312 are larger than the first electrode portion 352 including the electrode portion 352C of the first peripheral electrode 311, and the second electrode portion 355 including the electrode portion 355F of the second peripheral electrode 312.

[0077] The -Y end of the first electrode portion 351F of the first peripheral electrode 311 and the +Y end of the second electrode portion 352C, which is located on the -X side of the first peripheral electrode 311, are connected in the X direction by the third electrode portion 353. In other words, the longitudinal end of the first electrode portion 351 of the first peripheral electrode 311 is connected via the third electrode portion 353 to the longitudinal end of the second electrode portion 352 of the first peripheral electrode 311, which is located closest to it in the width direction.

[0078] Multiple electrode portions 351, 352, and 353 of the first peripheral electrode 311 are connected along the longitudinal and circumferential directions of the peripheral region A3, forming a single electrode. The +Z side end of a contact plug (not shown) made of a conductive material is connected from the -Z side of the element substrate 12 to any appropriate electrode portion 351 or electrode portion 352 among the multiple electrode portions 351, 352, and 353 that constitute the first peripheral electrode 311. The -Z side end of the contact plug (not shown) connected to the appropriate electrode portion 351 or electrode portion 352 is connected to a common wiring or the like formed on the -Z side of the element substrate 12.

[0079] On the other hand, the +Y end of the first electrode portion 354C located on the -X side of the second peripheral electrode 312 and the second electrode portion 355F of the second peripheral electrode 312 are disconnected in both the X and Y directions. Therefore, a contact plug 371 made of a conductive material is electrically connected to the electrode portion 354C located on the -X side of the second peripheral electrode 312 from the element substrate 12 on the -Z side. A contact plug 372 made of a conductive material is electrically connected to the electrode portion 355F of the second peripheral electrode 312 from the element substrate 12 on the -Z side.

[0080] Each of the multiple first electrode portions 354, including the electrode portion 354C of the second peripheral electrode 312, has a contact plug made of a conductive material, similar to the contact plug 371, electrically connected to the +Z side of the element substrate 12 on the -Z side. Each of the multiple second electrode portions 355, including the electrode portion 355F of the second peripheral electrode 312, has a contact plug made of a conductive material, similar to the contact plug 372, electrically connected to the +Z side of the element substrate 12 on the -Z side. The -Z side of each contact plug connected to the contact plugs 371, 372, and each of the electrode portions 354, 355, is connected to a different wiring from the common wiring to which a contact plug (not shown) connected to the appropriate electrode portion 351 or electrode portion 352 is connected.

[0081] In the Y direction, the distance between the +Y end of the electrode portion 354C located on the -X side and the -Y end of the electrode portion 353 connecting the electrode portions 351F and 352C is shorter than the distance between the +Y end of the electrode portion 354C located on the -X side and the -Y end of the electrode portion 351F. In the X direction, an insulating layer 391 is placed between the electrode portion 354C located on the -X side and the electrode portion 352C. In the Y direction, because the insulating layer 391 is interposed between the electrode portion 354C located on the -X side and the electrode portion 353 connecting the electrode portions 351F and 352C, the electrode portion 354C located on the -X side is reliably insulated from the electrode portion 353 connecting the electrode portions 351F and 352C.

[0082] The insulating layer 392 is positioned on the +X side of the electrode portion 354C located on the -X side, further to the +X side than the +Y side end, and further to the -X side than the pixel region A1. The insulating layer 392 substantially overlaps with the insulating layer 391 in the Y direction. The contact plug 371 is included in the region where the insulating layers 391 and 392 are located in the Y direction.

[0083] In the Y direction, the distance between the -Y end of electrode portion 355F and the +Y end of electrode portion 353 connecting electrode portions 351F and 352C is shorter than the distance between the -Y end of electrode portion 355F and the +Y end of electrode portion 352C located on the -X side. In the X direction, an insulating layer 393 is positioned between electrode portion 353F and electrode portion 351F. In the Y direction, an insulating layer 383 is interposed between electrode portion 355F and electrode portion 353 connecting electrode portions 351F and 352C, so electrode portion 355F is reliably insulated from electrode portion 353 connecting electrode portions 351F and 352C.

[0084] The insulating layer 394 is positioned on the -X side of the -Y end of the electrode portion 355F, and on the +X side of the sealing material 16 located in region A34 of the peripheral region A3. The insulating layer 394 substantially overlaps with the insulating layer 393 in the Y direction. The contact plug 372 is included in the region where the insulating layers 393 and 394 are located in the Y direction.

[0085] When an appropriate potential is applied to each electrode of the liquid crystal device 10, color light L is incident along the Z direction from the +Z side of the plate surface 15a of the opposing substrate 15 of the second substrate 115 of the pixel region A1, and as the conversion of color light L into image light proceeds, impurities IM and IP are generated in the liquid crystal layer 140. The impurity IM generated from the liquid crystal layer 140 of the pixel region A1 is captured, for example, by the first electrode portion 351F of the first peripheral electrode 311. The impurity IP generated from the liquid crystal layer 140 of the pixel region A1 is captured, for example, by the first electrode portion 355F of the second peripheral electrode 312.

[0086] In the liquid crystal display device 10, as described above, impurities IM generated in the liquid crystal layer 140 of pixel region A1 are captured by the energized first peripheral electrode 311, and impurities IP generated in the liquid crystal layer 140 of pixel region A1 are captured by the energized second peripheral electrode 312. As a result, the formation of display stains and the like at the outer edge of pixel region A1 is prevented, and the decrease in the amount of image light emitted from pixel region A1 is suppressed. Consequently, the display quality and reliability of the liquid crystal display device 10 are improved.

[0087] Each of the potentials LC1 and LC2 is either a DC potential or an AC potential, preferably a DC potential. The fact that each of the potentials LC1 and LC2 is a DC potential stabilizes the capture effect of impurity IM at the energized first peripheral electrode 311 and the capture effect of impurity IP at the energized second peripheral electrode 312.

[0088] However, if both potentials LC1 and LC2 are AC potentials, and the positive and negative polarity of potential LC1 with respect to potential LCcom alternates at a predetermined time period, the trapping effect of the energized first peripheral electrode 311 on impurities IM and impurities IP switches at each period time. Similarly, if the negative and positive polarity of potential LC2 with respect to potential LCcom alternates at a predetermined time period, the trapping effect of the energized second peripheral electrode 312 on impurities IP and impurities IM switches at each period time.

[0089] The first peripheral electrode 311 and the second peripheral electrode 312 are not electrically connected to each other, nor are they connected to each other in the XY plane. The lengths of the first electrode portions 351A to 351F and the second electrode portions 352A to 352F of the positively polarized first peripheral electrode 311 along the circumferential direction in the peripheral region A3 are determined in accordance with the movement direction and movement speed of the negatively polarized impurity IM generated in the liquid crystal layer 140 of the pixel region A1, and also taking into consideration the ratio of impurity IM to impurity IP generated in the liquid crystal layer 140 of the pixel region A1.

[0090] Similarly, the length along the circumferential direction in the peripheral region A3 of the first electrode portions 354A to 354F and the second electrode portions 355A to 355F of the negatively polarized second peripheral electrode 312 is determined in accordance with the movement direction and speed of the positively polarized impurity IP generated in the liquid crystal layer 140 of the pixel region A1, and also taking into consideration the ratio of impurity IM to impurity IP generated in the liquid crystal layer 140 of the pixel region A1.

[0091] In the liquid crystal device 10, the direction in which the liquid crystal molecules of the liquid crystal layer 140 are oriented is determined by the spraying angle of the material for the alignment film 331 when the alignment film 331 is obliquely deposited on the +Z-side surfaces of each of the multiple pixel electrodes 120, multiple dummy pixel electrodes 122, the first peripheral electrode 311 and the second peripheral electrode 312, and the plate surface 12b of the element substrate 12 on which no electrodes are formed, and by the spraying angle of the material for the alignment film 332 when the alignment film 332 is obliquely deposited on the -Z-side surface of the opposing electrode 150.

[0092] For example, as shown in Figure 1, the liquid crystal molecules of the liquid crystal layer 140 may be oriented by the alignment films 331 and 332 in the absence of applied voltage in a direction where they move from the -Y side to the +Y side as they move from the -X side to the +X side in the pixel region A1, that is, in a plan view, along the alignment direction F which is along the line connecting the vicinity of the +X and +Y corners of the pixel region A1 and the vicinity of the -X and -Y corners.

[0093] Most of the negative-polarity impurities IM generated in the liquid crystal layer 140 of pixel region A1 move along the orientation direction F to the +X and +Y corners of pixel region A1, and are captured by the first electrode portions 351A and 351C of the first peripheral electrode 311 that are located on the -X side and facing these corners. At least a portion of the remaining impurities IM moves in a plan view, deviating from the orientation direction F as indicated by the dashed arrow GM, and moves toward the -X and +Y corners of pixel region A1.

[0094] In the above example, in a plan view, the +X and +Y corners of pixel region A1 correspond to the first corner described later and the first corner of the display area of ​​the liquid crystal device described in the claims. In a plan view, the -X and -Y corners of pixel region A1 are diagonally opposite to the +X and +Y corners and correspond to the second corner described later and the second corner of the display area of ​​the liquid crystal device described in the claims.

[0095] At least the remaining portion of the impurity IM moves from the -Y side to the +Y side at the outer edge of the peripheral region A3 facing region A34 in the pixel region A1 in a plan view, passing through the dummy pixel region A2 and moving to region A34. The impurity IM that has moved to region A34 is first captured by the first electrode portion 351F and the first electrode portion 351C on the -X side of the first peripheral electrode 311.

[0096] A portion of impurity IM moving from the -Y end to the +Y end of electrode portion 351F is repelled by the negative polarity electrode portion 354F facing the +Y end of the positive polarity electrode portion 351F in the Y direction, and is unable to move further towards the +Y side, instead moving towards the -X side. A portion of impurity IM moving from the -Y end to the +Y end of electrode portion 351C is repelled by the negative polarity electrode portion 355A facing the +Y end of the positive polarity electrode portion 351C located on the +X side in the Y direction and located on the +X side, and is unable to move further towards the +Y side, instead moving towards the +X side along the -X side electrode portion 351A connected to the -X side electrode portion 351C, where it is captured and accumulated.

[0097] As described above, since the impurity IM moves in the X direction at the +Y end of electrode portion 351F and the +Y end of electrode portion 351C located on the -X side, the size in the X direction, i.e., the width dimension, of electrode portion 351C is larger than the size in the X direction, i.e., the width dimension, of electrode portion 352F and electrode portion 352C located on the -X side.

[0098] In the first electrode portion 351C and the first electrode portion 351F located on the -X side of the first peripheral electrode 311, the remaining portion of the impurity IM that moves to the -X side passes through electrode portion 353 and is captured and accumulated in the second electrode portion 352C and the second electrode portion 352F located on the -X side of the first peripheral electrode 311.

[0099] For example, most of the impurities IM that have moved to electrode portion 352F are repelled from the -Y side by electrode portion 355F, from the +X side by electrode portion 354F, and from the +Y side by electrode portion 355C located on the -X side. Therefore, the return of impurities IM that have been captured and accumulated in electrode portion 352F in the energized peripheral region A3 to pixel region A1 is suppressed. When electrode portion 352F is de-energized, the captured impurities IM diffuse, but in a plan view, electrode portion 352F is located further from pixel region A1 than electrode portions 351C, 351F, and 354F, so the return of impurities IM from electrode portion 352F to pixel region A1 is suppressed.

[0100] As described above, the impurities IM that have moved from the -Y side do not overflow from the electrode portions 351C and 351F in the X direction to the +Y side ends of the first electrode portions 351C and 351F located on the -X side, and the return of impurities IM from the second electrode portion 352F and the second electrode portion 352C located on the -X side to the pixel area A1 is suppressed. Therefore, in the liquid crystal device 10, the occurrence of display stains and display unevenness caused by impurities IM returning to the pixel area A1 is well suppressed.

[0101] On the other hand, most of the positively polarized impurities IP generated in the liquid crystal layer 140 of pixel region A1 move along the orientation direction F to the -X and -Y corners of pixel region A1, and are captured by the first electrode portions 354C and 354D of the second peripheral electrode 312 that are positioned on the +X side and facing these corners. At least a portion of the remaining impurities IP moves in a plan view, deviating from the orientation direction F as shown by the dashed arrow GP, and moves toward the -X and +Y corners of pixel region A1.

[0102] At least the remaining portion of the impurity IP moves from the +Y side to the -Y side at the outer edge of the peripheral region A3 facing region A32 in the pixel region A1 in a plan view, passing through the dummy pixel region A2 and moving to region A32. The impurity IP that has moved to region A32 is first captured by the first electrode portion 354B and the first electrode portion 354C on the -X side of the second peripheral electrode 312.

[0103] A portion of impurity IP moving from the +Y end to the -Y end of electrode portion 354B is repelled by the positive electrode portion 351D facing the -Y end of the negative electrode portion 354B in the Y direction, and is unable to move further to the -Y side, instead moving to the +X side. A portion of impurity IP moving from the +Y end to the -Y end of electrode portion 354C is repelled by the positive electrode portion 352D facing the -Y end of the negative electrode portion 354C located on the -X side in the Y direction, and is also located on the -X side, and is unable to move further to the -Y side, instead moving along the +X side electrode portion 354D connected to the +X side electrode portion 354C, where it is captured and accumulated.

[0104] As described above, since the impurity IP moves in the X direction at the -Y end of electrode portion 354B and the -Y end of electrode portion 354C located on the -X side, the X-direction size, i.e., the width dimension, of each electrode portion 354B and 354C is larger than the X-direction size, i.e., the width dimension, of each electrode portion 355D and the +X-direction electrode portion 355C located on the +X side.

[0105] In the first electrode portion 354B and the first electrode portion 354C located on the +X side of the second peripheral electrode 312, the remaining portion of the impurity IP that moves to the +X side passes through electrode portion 353 and is captured and accumulated in the second electrode portion 355C and the second electrode portion 355D located on the +X side of the second peripheral electrode 312.

[0106] For example, most of the impurity IP that has moved to electrode portion 355D is repelled by electrode portion 352C, which is located on the -X side, from the -Y side, by electrode portion 351D from the -X side, and by electrode portion 352B from the +Y side. As a result, the return of impurity IP that has been captured and accumulated in the energized electrode portion 355D in the peripheral region A3 to the pixel region A1 is suppressed. When electrode portion 355D is de-energized, the captured impurity IP diffuses, but in a plan view, electrode portion 355D is located further from the pixel region A1 than electrode portions 351D, 354B, and 354C, so the return of impurity IP from electrode portion 355D to the pixel region A1 is suppressed.

[0107] As described above, impurity IP that has moved from the +Y side does not overflow from the electrode parts 354B and 354C in the X direction to the -Y side ends of the first electrode part 354B and the first electrode part 354C located on the +X side, and the return of impurity IP from the second electrode part 355D and the second electrode part 355C located on the -X side to the pixel area A1 is suppressed. As a result, the occurrence of display stains and display unevenness caused by impurity IP returning to the pixel area A1 is effectively suppressed.

[0108] <Projectors, electronic devices> Next, we will describe a projector, which is an example of an electronic device equipped with the liquid crystal display device 10 of the first embodiment.

[0109] Figure 6 is a schematic diagram of the projector 200 of the first embodiment. As shown in Figure 6, the projector 200 is a so-called three-chip projector and comprises a light source device 210, two dichroic mirrors 211 and 212, three total reflection mirrors 215, 216 and 217, three liquid crystal devices 10B, 10G and 10R, a cross dichroic prism 230, and a projection optical system 240. Each of the liquid crystal devices 10B, 10G and 10R is configured in the same way as the liquid crystal device 10 described above.

[0110] The light source device 210 consists of a halogen lamp or a white light-emitting diode (LED) and emits white light including red, green, and blue light. The white light emitted from the light source device 210 is separated into red light, green light, and blue light by the dichroic mirror 211, and then separated into green light and blue light by the dichroic mirror 212.

[0111] The red light emitted from the dichroic mirror 211 is irradiated onto the liquid crystal device 10R by the total reflection mirror 215. The green light emitted from the dichroic mirror 211 is emitted from the dichroic mirror 212 and irradiated onto the liquid crystal device 10G. The blue light emitted from the dichroic mirror 211 is irradiated onto the liquid crystal device 10B by the total reflection mirrors 216 and 217.

[0112] The optical path from the dichroic mirror 211 to the liquid crystal device 10B for blue light is longer than the optical path from the dichroic mirror 211 to the liquid crystal device 10R for red light, and the optical path from the dichroic mirror 211 to the liquid crystal device 10G for green light. To reduce the loss of blue light to red and green light, an incident lens 222 is placed on the optical path of blue light between the dichroic mirror 212 and the total reflection mirror 216. A relay lens 223 is placed between the total reflection mirror 216 and the total reflection mirror 217. An exit lens 224 is placed between the total reflection mirror 217 and the liquid crystal device 10B. The incident lens 222, relay lens 223, and exit lens 224 constitute a relay optical system 220.

[0113] Liquid crystal device 10R is driven based on an image data signal input in response to incident red light and generates image light R including a red transmitted image. Liquid crystal device 10G is driven based on an image data signal input in response to incident green light and generates image light G including a green transmitted image. Liquid crystal device 10B is driven based on an image data signal input in response to incident blue light and generates image light B including a blue transmitted image. Image lights R, G, and B are included in the aforementioned color light L.

[0114] Image light R emitted from liquid crystal device 10R, image light G emitted from liquid crystal device 10G, and image light B emitted from liquid crystal device 10B enter the cross dichroic prism 230 from different directions in a planar view. In the cross dichroic prism 230, image light R and B are reflected, and the optical paths of image light R and B are refracted by 90° in a planar view. In the cross dichroic prism 230, image light G is transmitted and travels in a straight line, and the optical path of image light G overlaps with the optical paths of image light R and B.

[0115] Image light, which is combined by a cross dichroic prism 230 and emitted in a direction different from the incident direction of image light R, G, and B, is projected onto the screen SCR by a projection optical system 240. The projection optical system 240 has one or more optical lenses. Examples of optical lenses include biconvex lenses, biconcave lenses, plano-convex lenses, meniscus lenses, aspherical lenses, or free-form lenses. A color image is displayed on the screen SCR.

[0116] In addition to the projector 200, other electronic devices equipped with electro-optical devices such as the liquid crystal display 10 include head-mounted displays, video cameras, electronic viewfinders in interchangeable-lens digital cameras, smartwatches, and display units for wearable devices.

[0117] <Effects and Effects> The liquid crystal apparatus 10 of the first embodiment described above comprises a counter electrode (common electrode) 150, a plurality of pixel electrodes 120, a first peripheral electrode (first electrode) 311, a second peripheral electrode (second electrode) 312, and a liquid crystal layer 140. A potential (common potential) LCcom is applied to the counter electrode 150. A potential (signal potential) LCsig is applied to each of the plurality of pixel electrodes 120. The plurality of pixel electrodes 120 are arranged in a pixel region (display region) A1 in plan view. A potential (first potential) LC1 with positive polarity relative to potential LCcom is applied to the first peripheral electrode 311. The first peripheral electrode 311 is arranged in a part of the peripheral region A3 surrounding the pixel region A1 in plan view. A potential (second potential) LC2 with negative polarity relative to potential LCcom is applied to the second peripheral electrode 312. The second peripheral electrode 312 is located in a part of the peripheral region A3 in a plan view, and is located in a different region of the peripheral region A3 from the first peripheral electrode 311. The liquid crystal layer 140 is located in the Z direction between each of the plurality of pixel electrodes 120 and the counter electrode 150, between the first peripheral electrode 311 and the counter electrode 150, and between the second peripheral electrode 312 and the counter electrode 150. In the liquid crystal apparatus 10 of the first embodiment, in a plan view, the first peripheral electrode 311 has a first electrode portion (first part) 351 and a second electrode portion (second part) 352. In a plan view, the distance d2 between the second electrode portion 352 and the pixel region A1 is longer than the distance d1 between the first electrode portion 351 and the pixel region A1. Furthermore, in a plan view, at least the first electrode portion 354 of the second peripheral electrode 312 is positioned between the pixel region A1 and the second electrode portion 352 of the first peripheral electrode 311.

[0118] In the liquid crystal apparatus 10 of the first embodiment, in the peripheral region A3 that surrounds the multiple pixel electrodes 120 of the pixel region A1 in a plan view, impurities IM that originate from the liquid crystal layer 140 of the pixel region A1 and have negative polarity are first captured by the first electrode portion 351 located on the inner circumference side of the positive polarity first peripheral electrode 311. The impurities IM that move to the end of the first electrode portion 351 on the second electrode portion 352 side in the longitudinal direction are repelled by the second peripheral electrode 312 located between the second electrode portion 352 and the pixel region A1, making it difficult for them to move along the circumferential direction. They accumulate at the end of the first electrode portion 351 and then move to the second electrode portion 352, which is located further away from the pixel region A1 in a plan view than the first electrode portion 351. In a plan view, since the negative polarity second peripheral electrode 312 is positioned between the positive polarity second electrode portion 352 and the pixel region A1, impurities IM that have moved to the second electrode portion 352 are repelled by the second peripheral electrode 312 and are not easily returned to the pixel region A1 electrically and physically. Impurities IP that originate from the liquid crystal layer 140 of the pixel region A1 and have positive polarity are captured by the negative polarity second peripheral electrode 312. Therefore, the capture of impurities IM by the energized first electrode portion 351 and the capture of impurities IM by the energized or unenergetic second electrode portion 352 are efficiently promoted. As a result, according to the liquid crystal apparatus 10 of the first embodiment, by arranging the first peripheral electrode 311 and the second peripheral electrode 312 in the peripheral region A3 as described above, taking into account the polarity of the impurities IM and IP, the occurrence of display stains and display unevenness caused by the movement and local aggregation of impurities IM and IP in the pixel region A1 can be suppressed, thereby improving display quality and reliability.

[0119] In the liquid crystal device 10 of the first embodiment, in a plan view, the first electrode portion 351 of the first peripheral electrode 311 and the first electrode portion 354 of the second peripheral electrode 312 are alternately arranged along the circumferential direction of the pixel region A1.

[0120] In the liquid crystal device 10 of the first embodiment, impurities IM accumulated at both ends of the first electrode portion 351 in the longitudinal direction are repelled by the second peripheral electrode 312 adjacent to each end in the circumferential direction of the peripheral region A3, making it difficult for them to move along the circumferential direction. They accumulate at both ends of the first electrode portion 351 and move to the second electrode portion 352 closest to each end in the circumferential direction of the peripheral region A3. The impurities IM that have moved to the second electrode portion 352 are repelled by the second peripheral electrode 312, making it difficult for them to return to the pixel region A1 electrically and physically. According to the liquid crystal device 10 of the first embodiment, the occurrence of display stains and display unevenness in the pixel region A1 can be suppressed throughout the circumferential direction, thereby improving display quality and reliability.

[0121] In the liquid crystal device 10 of the first embodiment, in a plan view, the pixel region A1 has a rectangular shape. The first electrode portion 351 of the first peripheral electrode 311 surrounds the +X and +Y corner (first corner) of the pixel region A1. The first electrode portion 354 of the second peripheral electrode 312 surrounds the -X and -Y corner (second corner) of the pixel region A1, which is located diagonally opposite the +X and +Y corner in a plan view.

[0122] In the liquid crystal apparatus 10 of the first embodiment, the electrode portions 351A and 351C of the first peripheral electrode 311 that are located on the +X side are positioned to face the +X and +Y corners of the pixel region A1 ahead in the direction of movement of the impurity IM. The electrode portions 354C and 354D of the second peripheral electrode 312 that are located on the -X side are positioned to face the -X and -Y corners of the pixel region A1 ahead in the direction of movement of the impurity IP. In the liquid crystal apparatus 10 of the first embodiment, when the impurity IM generated from the liquid crystal layer 140 of the pixel region A1 moves toward the +X and +Y corners in a plan view, most of the impurity IM is efficiently captured by the electrode portions 351A and 351C of the first peripheral electrode 311. When the impurity IP generated from the liquid crystal layer 140 of the pixel region A1 moves toward the -X and -Y corners in a plan view, most of the impurity IP is efficiently captured by the electrode portions 354C and 354D of the second peripheral electrode 312. According to the liquid crystal device 10 of the first embodiment, the occurrence of display stains and display unevenness in the pixel area A1 can be efficiently suppressed, thereby improving display quality and reliability.

[0123] In the liquid crystal apparatus 10 of the first embodiment, in a plan view, the pixel region A1 has a rectangular shape with a long side parallel to the X direction and a short side parallel to the Y direction. The electrode portions 351A and 351B of the first peripheral electrode 311 face the long side (one long side) on the +Y side parallel to the X direction of the pixel region A1. The electrode portions 351A and 351C of the first peripheral electrode 311 surround the corners at both ends of the long side on the +Y side parallel to the X direction of the pixel region A1, that is, the corner on the +X side and +Y side and the corner on the -X side and +Y side.

[0124] In the liquid crystal device 10 of the first embodiment, when impurities IM generated from the liquid crystal layer 140 of the pixel region A1 move mainly toward the +X and +Y corners in a plan view, most of the impurities IM are efficiently captured by the electrode portions 351A and 351C located on the +X side of the first peripheral electrode 311, and the remaining portion of the impurities IM is efficiently captured by the electrode portions 351A, 351C and electrode portion 351B located on the -X side of the first peripheral electrode 311. According to the liquid crystal device 10 of the first embodiment, the occurrence of display stains and display unevenness in the pixel region A1 can be efficiently suppressed, and the display quality and reliability can be further improved.

[0125] In the liquid crystal apparatus 10 of the first embodiment, the first peripheral electrode 311 further has a third electrode portion (third part) 353 which, in a plan view, is shorter in distance from the pixel region A1 than the second electrode portion 352. The first electrode portion 354 of the second peripheral electrode 312 is positioned between the pixel region A1 and the electrode portion 353 in a plan view, and is positioned between the pixel region A1 and the electrode portion 353 in the width direction of the peripheral region A3.

[0126] In the liquid crystal device 10 of the first embodiment, electrode portions 351 and 352 of the first peripheral electrode 311 that are adjacent to each other in the circumferential direction of the peripheral region A3, that is, in the longitudinal direction of each of the regions A31 to A34 of the peripheral region A3, can be connected by electrode portion 353. As a result, at least the first peripheral electrode 311 of the first peripheral electrode 311 and the second peripheral electrode 312 are connected by electrode portions 351, 352, and 353 along the circumferential direction of the peripheral region A3, and can form a single first electrode as a whole. According to the liquid crystal device 10 of the first embodiment, the first peripheral electrode 311 is configured as an electrode connected along the circumferential direction of the peripheral region A3, the number of connection parts such as wiring and contact plugs connected to the first peripheral electrode 311 is reduced, the constraints on the arrangement of common wiring or conductive layers (not shown) formed on the element substrate 12 are reduced, and simplification and simplification of the manufacturing process can be achieved.

[0127] In the liquid crystal apparatus 10 of the first embodiment, in a plan view, the second peripheral electrode 312 has a first electrode portion (fourth portion) 354 and a second electrode portion (fifth portion) 355. In a plan view, the distance d2 between the second electrode portion 355 and the pixel region A1 is longer than the distance d1 between the first electrode portion 354 and the pixel region A1. Also, in a plan view, at least the first electrode portion 351 of the first peripheral electrode 311 is positioned between the pixel region A1 and the second electrode portion 355 of the second peripheral electrode 312.

[0128] In the liquid crystal apparatus 10 of the first embodiment, in the peripheral region A3, impurities IP having positive polarity that originate from the liquid crystal layer 140 of the pixel region A1 are first captured by the first electrode portion 354 located on the inner circumference side of the negatively polarized second peripheral electrode 312. The impurities IP that move towards the end of the first electrode portion 354 on the second electrode portion 355 side in the longitudinal direction are repelled by the first peripheral electrode 311 located between the second electrode portion 355 and the pixel region A1, making it difficult for them to move along the circumferential direction. They accumulate at the end of the first electrode portion 354 and then move to the second electrode portion 355, which is located further away from the pixel region A1 in a plan view than the first electrode portion 354. In a plan view, since the positive polarity first peripheral electrode 311 is positioned between the negative polarity second electrode portion 355 and the pixel region A1, impurity IP that has moved to the second electrode portion 355 is repelled by the first peripheral electrode 311 and is not easily returned to the pixel region A1 electrically and physically. Therefore, the capture of impurity IP by the energized first electrode portion 354 and the capture of impurity IP by the energized or unenergetic second electrode portion 355 are efficiently promoted. As a result, according to the liquid crystal apparatus 10 of the first embodiment, by arranging the first peripheral electrode 311 and the second peripheral electrode 312 in the peripheral region A3 as described above, taking into account the polarity of impurities IM and IP, the occurrence of display stains and display unevenness caused by the movement and local accumulation of impurities IM and IP in the pixel region A1 can be suppressed, thereby improving display quality and reliability.

[0129] In the liquid crystal device 10 of the first embodiment, in a plan view, the electrode portions 354D and 354E of the second peripheral electrode 312 face the long side on the -Y side parallel to the X direction of the pixel region A1. The electrode portions 354C and 354D of the second peripheral electrode 312 surround the corners at both ends of the long side on the -Y side parallel to the X direction of the pixel region A1, that is, the corners on the -X side and -Y side and the corners on the +X side and -Y side.

[0130] In the liquid crystal device 10 of the first embodiment, when impurities IP generated from the liquid crystal layer 140 of the pixel area A1 move mainly toward the -X and -Y corners in a plan view, most of the impurities IP are efficiently captured by the electrode portions 354C and 351D located on the -X side of the second peripheral electrode 312, and the remaining portion of the impurities IP is efficiently captured by the electrode portions 354C, 354D and electrode portion 351E located on the +X side of the second peripheral electrode 312. According to the liquid crystal device 10 of the first embodiment, the occurrence of display stains and display unevenness in the pixel area A1 can be efficiently suppressed, and the display quality and reliability can be further improved.

[0131] The electronic device including the projector (electronic device) 200 of the first embodiment comprises the liquid crystal display device 10 described above.

[0132] According to the projector 200 and electronic equipment of the first embodiment, since it is equipped with a liquid crystal device 10, the display quality and reliability of the entire projected image can be improved.

[0133] [Second Embodiment] Next, a second embodiment of the present invention will be described with reference to Figure 7. In the description of the second embodiment, the explanation of the contents common to the first embodiment will be omitted, and only the contents that differ from the first embodiment will be described. In addition, among the configurations of the liquid crystal device of the second embodiment, the components common to the liquid crystal device 10 of the first embodiment are denoted by the same reference numerals as the corresponding components in the liquid crystal device 10 of the first embodiment, and detailed explanations are omitted.

[0134] Figure 7 is a plan view of the liquid crystal device 20. The liquid crystal device 11 of the second embodiment has the same configuration as the liquid crystal device 10 of the first embodiment. However, as shown in Figure 7, in the liquid crystal device 11, the first electrode portion 351G of the first peripheral electrode 311 is arranged in place of the first electrode portions 351A and 351B of the first peripheral electrode 311 and the first electrode portion 354A of the second peripheral electrode 312 of the liquid crystal device 10. Also, in the liquid crystal device 11, the second electrode portion 355G of the second peripheral electrode 312 is arranged in place of the second electrode portion 352A of the first peripheral electrode 311 and the second electrode portions 355A and 355B of the second peripheral electrode 312 of the liquid crystal device 10.

[0135] The +X end of electrode portion 351G is connected to the +Y end of electrode portion 351C, which is located on the +X side. The -X end of electrode portion 351G is connected to the +Y end of electrode portion 351C, which is located on the -X side. In a plan view, the +X end of electrode portion 351C and electrode portion 351G, which are located on the +X side, face each other at the +X and +Y corners of pixel region A1. The -X end of electrode portion 351C and electrode portion 351G, which are located on the -X side, face each other at the -X and +Y corners of pixel region A1.

[0136] In the liquid crystal device 11, in the inner peripheral region of region A31, the first electrode portion 351G of the first peripheral electrode 311 is arranged without gaps along the X direction from the -X end to the +X end. In the outer peripheral region of region A31, the second electrode portion 355G of the second peripheral electrode 312 is arranged without gaps along the X direction from the -X end to the +X end. The size of electrode portion 351G in the Y direction, i.e., the width dimension, is larger than the size of electrode portion 355G in the Y direction, i.e., the width dimension, and is equivalent to the size of the first electrode portion 351 including electrode portion 351C in the Y direction, i.e., the width dimension.

[0137] The liquid crystal device 11 of the second embodiment described above includes, similar to the liquid crystal device 10 of the first embodiment, a counter electrode (common electrode) 150, a plurality of pixel electrodes 120, a first peripheral electrode (first electrode) 311, a second peripheral electrode (second electrode) 312, and a liquid crystal layer 140. The liquid crystal device 11 of the second embodiment provides the same effects and advantages as the liquid crystal device 10 of the first embodiment.

[0138] Furthermore, in the liquid crystal device 11 of the second embodiment, one electrode portion 351G of the first peripheral electrode 311 faces the long side on the +Y side parallel to the X direction of the pixel region A1, and one electrode portion 355G of the second peripheral electrode 312 is positioned on the +Y side of the electrode portion 351G. According to the liquid crystal device 11 of the second embodiment, the number of connection parts such as wiring and contact plugs connected to the first peripheral electrode 311 can be further reduced, and the constraints on the arrangement of wiring that carries the source lines of the TFT (not shown) formed on the element substrate 12, various common wiring, or conductive layers can be reduced, thereby further simplifying the device and simplifying the manufacturing process.

[0139] In detail, it has been found that the migration speed of impurities IM generated from the liquid crystal layer 140 of pixel region A1 is slower than the migration speed of impurities IP generated from the liquid crystal layer 140. At least a portion of the impurities IP moves to the peripheral area forming the long side on the +Y side parallel to the X direction of pixel region A1 and is captured by the first electrode portion 351G of the first peripheral electrode 311. As described above, since the migration speed of impurities IM is slower than that of impurities IP, the impurities IM captured by the electrode portion 351G are more likely to move along the Y direction towards the +Y side than to move along the X direction.

[0140] In the liquid crystal apparatus 11 of the second embodiment, the electrode portion 351G of the first peripheral electrode 311, which captures impurities IM that move relatively slowly, faces the +X and +Y corners, the -X and +Y corners, and the +Y peripheral area parallel to the X direction of the pixel region A1, which is the destination of the impurities IM, and is arranged in a connected manner along the circumferential direction of the peripheral region A3. The electrode portion 355G of the second peripheral electrode 312 is arranged in the peripheral region A3 so as to face the electrode portion 351G from the outer periphery side. The width dimension of the electrode portion 351G is larger than the width dimension of the electrode portion 355G. In the liquid crystal apparatus 11 of the second embodiment, impurities IM, which have a relatively slow movement speed, are captured by the electrode portion 351G, and while allowing a certain degree of spreading toward the +Y side for the impurities IM, the exclusion effect from the electrode portion 355G is effective, and the movement of impurities IM toward the +Y side and the movement in the X direction of the electrode portion 351G are well dispersed. Compared to the liquid crystal apparatus 10 of the first embodiment, the capture effect of impurities IM can be improved in the liquid crystal apparatus 11 of the second embodiment.

[0141] Although preferred embodiments of the present invention have been described in detail above, the present invention is not limited to these specific embodiments, and various modifications and changes are possible within the scope of the gist of the invention as described in the claims.

[0142] For example, in cross-sectional views of liquid crystal devices, the laminated structure including conductive layers, semiconductor layers, or insulating layers contained in each of the element substrate 12 and the opposing substrate 15 is omitted, and an example of a conductive layer is shown. A conductive layer, semiconductor layer, or insulating layer (not shown) for wiring or interlayer spacing may be provided between the +Z side surface of the element substrate 12 and at least one of the pixels 120, dummy pixel electrode 122, first peripheral electrode 311, and second peripheral electrode 312. The -Z side surface of at least one of the pixels 120, dummy pixel electrode 122, first peripheral electrode 311, and second peripheral electrode 312 does not have to be a flat surface.

[0143] For example, in the liquid crystal device 10 of the first embodiment and the liquid crystal device 11 of the second embodiment, fine irregularities may be formed on the +Z side surfaces of the electrode portions 351, 352, and 353 of the first peripheral electrode 311, and fine irregularities may be formed on the +Z side surfaces of the electrode portions 354 and 355 of the second peripheral electrode 312.

[0144] [Summary of this disclosure] A summary of this disclosure is provided below. (Note 1) A liquid crystal device comprising: a common electrode to which a common potential is applied; a plurality of pixel electrodes to which a signal potential is applied and which are arranged in a display area; a first electrode to which a positive potential is applied with respect to the common potential and which is arranged in a part of a peripheral area surrounding the display area in a plan view; a second electrode to which a negative potential is applied with respect to the common potential and which is arranged in a part of the peripheral area in a plan view; and a liquid crystal layer arranged between each of the plurality of pixel electrodes and the common electrode, between the first electrode and the common electrode, and between the second electrode and the common electrode, wherein in a plan view, the first electrode has a first part and a second part which is at a longer distance from the display area than the first part, and in a plan view, the second electrode is arranged between the display area and the second part.

[0145] The configuration described in Appendix 1 efficiently promotes the capture of negatively polarized impurities in the first portion of the first electrode when it is energized, and in the second portion when it is energized or not, when negatively polarized impurities are generated from the liquid crystal layer of the display area. As a result, the configuration described in Appendix 1 allows the first and second electrodes to be positioned as peripheral electrodes, taking into account the polarity of the impurities, thereby suppressing the occurrence of display stains and unevenness caused by the movement and localized aggregation of negatively polarized impurities in the display area, and improving the display quality and reliability of the liquid crystal device.

[0146] (Note 2) The liquid crystal device according to Note 1, wherein, in a plan view, the first portion and the second electrode are alternately arranged along the circumferential direction of the display area.

[0147] The configuration described in Appendix 2 allows the second electrode to repel impurities that have moved to the second portion of the first electrode, making it difficult for the impurities to return to the display area both electrically and physically. This suppresses the occurrence of display stains and unevenness in the display area throughout the circumferential direction, thereby improving the display quality and reliability of the liquid crystal display device.

[0148] (Note 3) In a plan view, the display area has a rectangular shape, the first portion surrounds the first corner of the display area, and the second electrode surrounds the second corner of the display area which is diagonally opposite to the first corner, the liquid crystal device according to Note 1 or Note 2.

[0149] In the configuration described in Appendix 3, when impurities generated from the liquid crystal layer of the display area move toward the first corner in a plan view, most of the impurities are efficiently captured by the first portion of the first peripheral electrode. When impurities with a different polarity from the aforementioned impurities generated from the liquid crystal layer of the display area move toward the second corner in a plan view, most of the impurities with a different polarity from the aforementioned impurities are efficiently captured by the second peripheral electrode. The configuration described in Appendix 3 efficiently suppresses the occurrence of display stains and unevenness in the display area, thereby improving the display quality and reliability of the liquid crystal device.

[0150] (Note 4) In a plan view, the display area has a rectangular shape, and the first portion faces one of the longer sides of the display area and surrounds the corners at both ends of the longer side, according to any of the liquid crystal devices described in Notes 1 to 3.

[0151] In the configuration described in Appendix 4, when impurities IM generated from the liquid crystal layer 140 of pixel region A1 move mainly toward one of the corners at both ends of the long side in a plan view, a portion of the impurities is efficiently captured by the first portion of the first electrode facing the other corner of the long side. The configuration described in Appendix 4 efficiently suppresses the occurrence of display stains and unevenness in the display area, further improving the display quality and reliability of the liquid crystal display device.

[0152] (Note 5) Any liquid crystal device according to Notes 1 to 4, wherein the first electrode further has a third portion which is shorter in distance from the display area than the second portion, and the second electrode is positioned between the display area and the third portion.

[0153] The configuration described in Appendix 5 allows the first electrode to be configured as a single electrode connected along the circumferential direction of the peripheral region, reducing the number of connection points such as wiring and contact plugs connected to the first electrode, thereby reducing constraints on the arrangement of common wiring or conductive layers, and simplifying the laminated structure of the liquid crystal device and the manufacturing process.

[0154] (Note 6) In a plan view, the second electrode has a fourth portion and a fifth portion whose distance from the display area is longer than that of the first portion, and in a plan view, the first portion is positioned between the display area and the fifth portion, according to any of Notes 1 to 5.

[0155] The configuration described in Appendix 6 efficiently promotes the capture of positively polarized impurities in the fourth portion of the second electrode when it is energized, and in the fifth portion when it is energized or not, when positively polarized impurities are generated from the liquid crystal layer of the display area. As a result, the configuration described in Appendix 6 allows the first and second electrodes to be positioned as peripheral electrodes, taking into account the polarity of the impurities, thereby suppressing the occurrence of display stains and unevenness caused by the movement and local aggregation of both negatively polarized and positively polarized impurities in the display area, and further improving the display quality and reliability of the liquid crystal device.

[0156] (Note 7) An electronic device equipped with any one of the liquid crystal devices specified in Notes 1 to 6.

[0157] The configuration described in Appendix 7 can improve the display quality of output images from electronic devices and enhance the reliability of those devices. [Explanation of Symbols]

[0158] 10...Liquid crystal device, 120...Pixel electrode, 150...Counter electrode (common electrode), 200...Projector (electronic device), 311...First peripheral electrode (first electrode), 312...Second peripheral electrode (second electrode), 351...Electrode portion (first portion), 352...Electrode portion (second portion), 353...Electrode portion (third portion), 354...Electrode portion (fourth portion), 355...Electrode portion (fifth portion), A1...Pixel area (display area), A3...Peripheral area.

Claims

1. A common electrode to which a common potential is applied, A signal potential is applied to each of the multiple pixel electrodes arranged in the display area, A first potential with positive polarity is applied to the common potential, and a first electrode is located in a part of the peripheral region surrounding the display area in a plan view, A second potential with negative polarity is applied to the aforementioned common potential, and a second electrode is located in a part of the peripheral region in a plan view, A liquid crystal layer is disposed between each of the plurality of pixel electrodes and the common electrode, between the first electrode and the common electrode, and between the second electrode and the common electrode. Equipped with, In a plan view, the first electrode is, Part 1 and, A second portion whose distance from the display area is longer than that of the first portion, It has, In a plan view, the second electrode is positioned between the display area and the second portion. Liquid crystal display (LCD) device.

2. In a plan view, the first portion and the second electrode are arranged alternately along the circumferential direction of the display area. The liquid crystal apparatus according to claim 1.

3. In a plan view, The display area has a rectangular shape. The first portion surrounds the first corner of the display area, The second electrode surrounds the second corner in the display area, which is diagonally opposite to the first corner. The liquid crystal apparatus according to claim 1 or claim 2.

4. In a plan view, The aforementioned display area has a rectangular shape. The first portion faces one of the longer sides of the display area and surrounds the corners at both ends of the longer side. The liquid crystal apparatus according to claim 1 or claim 2.

5. The first electrode further has a third portion which is shorter in distance from the display area than the second portion. The second electrode is positioned between the display area and the third portion. The liquid crystal apparatus according to claim 1 or claim 2.

6. In a plan view, the second electrode is Part 4 and, A fifth portion whose distance from the display area is longer than that of the first portion, It has, In a plan view, the first portion is positioned between the display area and the fifth portion. The liquid crystal apparatus according to claim 1 or claim 2.

7. A liquid crystal device comprising the liquid crystal device according to claim 1 or claim 2, electronic equipment.

Images