Electro-optical device and electronic apparatus

Abstract

To provide an electro-optical device and an electronic apparatus that prevent the occurrence of a display defect derived from ionic impurities.SOLUTION: A liquid crystal divice 100 comprises: a display area E in which first pixel electrodes 15 are arranged; a peripheral area S that surrounds the display area E in a frame shape and in which second pixel electrodes 19 are arranged; peripheral circuits such as scan line drive circuits 102 that are arranged planarly overlapping the peripheral area S; and a liquid crystal layer 50 that includes liquid crystal 50a. TFTs 30 of the second pixel electrodes 19 are provided at positions not planarly overlapping the peripheral circuits. The second pixel electrodes 19 extend from an area not planarly overlapping the peripheral circuits to an area overlapping the peripheral circuits and are AC-driven by the TFTs 30.SELECTED DRAWING: Figure 5

Description

Technical Field

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

Background Art

[0002] Conventionally, a projector using an electro-optical device such as a liquid crystal device as a light modulation device has been known. In such a projector, the light beam density incident on the liquid crystal device is larger than that of a direct-view liquid crystal device. Therefore, ionic impurities derived from a sealing material or the like are likely to elute into the liquid crystal layer of the liquid crystal device. The ionic impurities may stay in the liquid crystal layer and induce disorder of the liquid crystal alignment, a decrease in the driving speed, and a decrease in the voltage holding ratio, which may cause a deterioration in the display quality of the liquid crystal device.

[0003] For example, Patent Document 1 discloses an electro-optical device including a dummy pixel region and an ion trap electrode that captures ionic impurities outside the display region. Further, Patent Document 2 discloses a liquid crystal image display device including a dummy pixel group between a display pixel group and a sealing material.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the electro-optical device of Patent Document 1, there was a problem that display defects in the form of stains were likely to occur at the corners of the display area. Specifically, when the width of the dummy pixel area was not sufficiently ensured and the display area and the ion trap electrode were close to each other, ionic impurities attracted to the ion trap electrode might protrude into the display area. Therefore, a configuration in which a wide dummy pixel group is arranged outside the display area, as in the liquid crystal image display device described in Patent Document 2, is conceivable. However, since each dummy pixel in the dummy pixel group requires a switching element for driving, it was difficult to arrange the peripheral circuits for driving and inspection and the dummy pixel group in a planar overlapping manner between the display area and the sealing material. That is, an electro-optical device that suppresses the occurrence of display defects due to ionic impurities has been demanded.

Means for Solving the Problems

[0006] The electro-optical device has, in a display area, a first pixel electrode, outside the display area , a plurality of a second pixel electrode , a scanning line driving circuit, and and includes among the plurality of one pixel electrode of the second pixel electrodes is arranged along the display area in the first direction so as to overlap the scanning line driving circuit in plan view and is provided so as to extend along a second direction intersecting the first direction. The other pixel electrodes among the plurality of second pixel electrodes are arranged along the display area in the second direction and are provided so as to extend along the first direction. The width of the one pixel electrode in the first direction is narrower than the length of the one pixel electrode in the second direction, and the width of the other pixel electrode in the second direction is narrower than the length of the other pixel electrode in the first direction. [FIG. 1] [FIG. 2] [FIG. 3] [FIG. 4] [FIG. 5] [FIG. 6] 。

[0007] The electronic device includes the above electro-optical device.

Brief Description of the Drawings

[0008] [FIG. 7] Schematic plan view showing the configuration of a liquid crystal device as an electro-optical device according to the first embodiment. [FIG. 8] Schematic cross-sectional view showing the configuration of the liquid crystal device. ​ Equivalent circuit diagram showing the electrical configuration of the liquid crystal device. ​Schematic cross-sectional view showing the configuration of the alignment film. ​ Schematic plan view showing the arrangement of the first pixel electrode and the second pixel electrode, etc. ​ Schematic plan view showing the arrangement of the peripheral electrode, the first pixel electrode, the second pixel electrode, etc. according to the second embodiment. ​ Schematic plan view showing the form of the peripheral electrode and the second pixel electrode according to the third embodiment. ​ Schematic diagram showing the configuration of a projection display device as an electronic device according to the fourth embodiment.

Embodiments for Carrying Out the Invention

[0009] In the following figures, the XYZ axes are attached as coordinate axes orthogonal to each other as necessary, the direction indicated by each arrow is defined as the + direction, and the direction opposite to the + direction is defined as the - direction. The +Z direction may be referred to as the upward direction and the -Z direction as the downward direction, and viewing from the +Z direction is referred to as plan view or planar. Also, in order to make the size of each layer and each member recognizable, the scale of each layer and each member is made different from the actual one.

[0010] Note that the thickness of a structure such as a film or a layer provided on the substrate refers to the distance in the direction along the Z axis, which is the normal direction of the substrate.

[0011] 1. First Embodiment In this embodiment, an active drive type liquid crystal device equipped with a thin film transistor (TFT) is exemplified as the electro-optical device. The configuration of the liquid crystal device 100 as the electro-optical device according to this embodiment will be described with reference to FIGS. 1 to 3. FIG. 2 shows a cross-section along the YZ plane including the line segment H-H' in FIG. 1. In FIG. 2, for the sake of illustration, the size and number of the liquid crystal contained in the liquid crystal layer are made different from the actual ones, and the illustration of the inspection circuit and wiring described later is omitted.

[0012] As shown in FIG. 1, the liquid crystal device 100 includes an element substrate 10, a counter substrate 20, and a liquid crystal layer (not shown). The element substrate 10 and the counter substrate 20 are substantially rectangular in plan view. The element substrate 10 and the counter substrate 20 are overlapped and joined via a sealing material 60 disposed along the outer edge of the counter substrate 20. Inside the sealing material 60, a display region E including a plurality of pixels P is provided. The display region E has a substantially rectangular outer periphery, with a pair of long sides along the X-axis and a pair of short sides along the Y-axis. The plurality of pixels P are arranged in a matrix in the directions along the X-axis and the Y-axis.

[0013] The sealing material 60 contains a resin having curability such as thermosetting or ultraviolet curability. Thereby, after applying the raw material of the sealing material 60 to the element substrate 10 or the counter substrate 20, the resin can be cured to form the sealing material 60 into a desired shape. The sealing material 60 may contain ionic impurities derived from raw materials such as the resin and the curing agent of the resin. Such ionic impurities may elute into the liquid crystal layer. In the liquid crystal device 100, since a second pixel electrode and the like, which will be described later, are provided, the diffusion of ionic impurities into the liquid crystal layer is suppressed.

[0014] The element substrate 10 has a data line driving circuit 101, a plurality of external connection terminals 104, two scanning line driving circuits 102, and an inspection circuit 103. The element substrate 10 is larger in plan view than the counter substrate 20. The plurality of external connection terminals 104 are provided in a region of the element substrate 10 that does not overlap with the counter substrate 20. The data line driving circuit 101 is provided between the plurality of external connection terminals 104 and the sealing material 60.

[0015] The liquid crystal device 100 includes a display region E and a peripheral region S. The peripheral region S is disposed between the sealing material 60 and the display region E. The peripheral region S is substantially rectangular and surrounds the display region E in a frame shape. Since the peripheral region S overlaps the cutout portion 24 of the counter substrate 20 in plan view, it does not contribute to the display of the liquid crystal device 100.

[0016] On the element substrate 10 in the display area E, first pixel electrodes (not shown) are arranged corresponding to a plurality of pixels P. On the element substrate 10 in the peripheral area S, second pixel electrodes (not shown) are arranged. Details of the first pixel electrode and the second pixel electrode will be described later.

[0017] On the element substrate 10, two scanning line driving circuits 102 and an inspection circuit 103 as peripheral circuits are provided. The two scanning line driving circuits 102 and the inspection circuit 103 are arranged so as to be planar and overlap with the peripheral area S. Note that the peripheral circuit of the present invention is not limited to the above. Wiring 107 is also arranged so as to overlap with the peripheral area S.

[0018] The two scanning line driving circuits 102 are provided along each of a pair of short sides on the outer periphery of the display area E. The two scanning line driving circuits 102 are electrically connected via the wiring 107. The wiring 107 is provided along one side in the +Y direction among a pair of long sides on the outer periphery of the display area E. Similarly to the wiring 107, the inspection circuit 103 is also provided along the one side in the +Y direction. The inspection circuit 103 is electrically connected to a data line described later.

[0019] The data line driving circuit 101 and the two scanning line driving circuits 102 are electrically connected to the external connection terminal 104. Upper and lower conduction portions 106 are provided at the four corners of the counter substrate 20.

[0020] As shown in FIG. 2, the element substrate 10 and the counter substrate 20 are opposed and spaced apart in the direction along the Z axis via the sealing material 60. The liquid crystal layer 50 is provided between the element substrate 10 and the counter substrate 20 and is surrounded by the element substrate 10, the counter substrate 20, and the sealing material 60. The liquid crystal layer 50 contains a liquid crystal 50a. The liquid crystal 50a has positive or negative dielectric anisotropy. In the present embodiment, a liquid crystal 50a having negative dielectric anisotropy is employed. Here, the liquid crystal 50a refers to individual liquid crystal molecules constituting the liquid crystal 50a or an aggregate of individual liquid crystal molecules.

[0021] The element substrate 10 includes a substrate 10s as a substrate body, a wiring layer including a TFT 30 as a driving transistor, a first pixel electrode 15, a second pixel electrode 19, and an alignment film 18. In the element substrate 10, toward the liquid crystal layer 50, the substrate 10s, the wiring layer, the first pixel electrode 15, and the second pixel electrode 19 are arranged in this order, and an alignment film 18 is provided further above them.

[0022] The first pixel electrode 15 and the second pixel electrode 19 are provided in the same layer among the layers stacked in the direction along the Z-axis of the element substrate 10 and are made of the same material. Examples of the material include transparent conductive films such as ITO (Indium Tin Oxide) and IZO (Indium Zinc Oxide). The first pixel electrode 15 and the second pixel electrode 19 are formed by patterning after forming the transparent conductive film. Thereby, it becomes possible to manufacture the second pixel electrode in the same process as the first pixel electrode, and the manufacturing process of the liquid crystal device 100 can be simplified.

[0023] The counter substrate 20 has a substrate 20s as a substrate body, a partition portion 24, an insulating layer 25, a common electrode 21, and an alignment film 22. In the counter substrate 20, toward the liquid crystal layer 50, the substrate 20s, the partition portion 24, the insulating layer 25, and the common electrode 21 are arranged in this order, and an alignment film 22 is provided in the -Z direction further above them.

[0024] The alignment film 18 has an upper surface facing the liquid crystal layer 50 and is disposed between the first pixel electrode 15 and the second pixel electrode 19 and the liquid crystal layer 50. The alignment film 18 includes a first vapor deposition film 18a and a second vapor deposition film 18b. The alignment film 22 has a lower surface facing the liquid crystal layer 50 and is disposed between the common electrode 21 and the liquid crystal layer 50. The alignment film 22 includes a third vapor deposition film 22a and a fourth vapor deposition film 22b.

[0025] The alignment films 18 and 22 are formed based on the optical design of the liquid crystal device 100. The alignment films 18 and 22 have a function of aligning the liquid crystal 50a of the liquid crystal layer 50. The alignment state of the liquid crystal 50a changes according to the voltage applied in response to the image signal described later.

[0026] The alignment films 18 and 22 substantially vertically align the liquid crystal 50a having negative dielectric anisotropy. For the alignment films 18 and 22, an inorganic material such as silicon oxide is employed, for example. The alignment film 18 is not limited to being composed of two layers, namely, a first vapor deposition film 18a and a second vapor deposition film 18b. The alignment film 22 is not limited to being composed of two layers, namely, a third vapor deposition film 22a and a fourth vapor deposition film 22b. The alignment films 18 and 22 may each have three or more layers.

[0027] The alignment films 18 and 22 give a pretilt to vertically align the liquid crystal 50a. The tilt direction of the pretilt is along a direction intersecting the X-axis and the Y-axis. When the liquid crystal layer 50 is driven, the pretilt is given to the alignment films 18 and 22, and the vertically aligned liquid crystal 50a changes its alignment state in the above tilt direction. When the on and off driving of the liquid crystal layer 50 is repeated, the liquid crystal 50a repeatedly exhibits behaviors of falling in the tilt direction of the pretilt and returning to the initial alignment state. Here, with respect to the XY plane along the surfaces of the alignment films 18 and 22, a liquid crystal 50a having negative dielectric anisotropy and being given a pretilt angle of less than 90° and being in an inverted alignment state is referred to as a substantially vertical alignment. Details of the alignment films 18 and 22 will be described later.

[0028] For the substrates 10s and 20s, a flat plate having light transmissivity and insulation properties such as a glass substrate or a quartz substrate is employed, for example. In this specification, light transmissivity means that the transmittance of visible light is 50% or more.

[0029] The liquid crystal device 100 is a transmissive type, and light L is incident from the +Z direction, which is the side of the counter substrate 20, and exits from the element substrate 10 through the liquid crystal layer 50. When the light L passes through the liquid crystal layer 50, it is modulated according to the alignment state of the liquid crystal 50a. The incident direction of the light L with respect to the liquid crystal device 100 is not limited to the above, and a configuration may be adopted in which the light L is incident from the element substrate 10. Further, the liquid crystal device 100 is not limited to being a transmissive type, and may be a reflective type. The liquid crystal device 100 may adopt an optical design such as a normally white mode or a normally black mode. The liquid crystal device 100 may be provided with polarization elements on the light incident side and the light exit side.

[0030] As shown in FIG. 3, the liquid crystal device 100 includes a plurality of data lines 6, scanning lines 3, and capacitor lines 8 as signal lines insulated from each other. The scanning lines 3 extend along the X-axis, and the data lines 6 and capacitor lines 8 extend along the Y-axis. Note that the capacitor lines 8 are not limited to the configuration along the Y-axis and may be configured along the X-axis.

[0031] The first pixel electrode 15, the TFT 30, and the capacitor element 16 are provided for each pixel P in a region defined by the scanning line 3, the data line 6, and the capacitor line 8, and constitute a pixel circuit of the pixel P. Signal lines such as the scanning line 3, the data line 6, and the capacitor line 8 are provided in the wiring layer described above.

[0032] The scanning line 3 is electrically connected to the gate of the TFT 30, which is a switching element. The data line 6 is electrically connected to the data line side source-drain region of the TFT 30. The scanning line 3 controls the on and off of the TFTs 30 provided in the same row all at once. The first pixel electrode 15 is electrically connected to the pixel electrode side source-drain region of the TFT 30.

[0033] The data line 6 is electrically connected to the data line driving circuit 101 described above, and supplies an image signal supplied from the data line driving circuit 101 to the pixel P. The image signal may be supplied to each data line 6 in a line sequential manner, or may be supplied to a plurality of adjacent data lines 6 in groups.

[0034] The scanning line 3 is electrically connected to the scanning line driving circuit 102 described above, and supplies a scanning signal supplied from the scanning line driving circuit 102 to the pixel P. The scanning signal is supplied to the scanning line 3 in a pulsed line sequential manner at a predetermined timing.

[0035] By inputting a scanning signal, the TFT 30 is turned on for a certain period, and an image signal is applied to the first pixel electrode 15 at a predetermined timing. The image signal is written at a predetermined level into the liquid crystal layer 50 via the first pixel electrode 15, and is held for a certain period between the first pixel electrode 15 and the common electrode 21 sandwiching the liquid crystal layer 50. At this time, the alignment state of the liquid crystal 50a changes due to the voltage applied according to the image signal. In order to prevent the held image signal from leaking, a capacitive element 16 is electrically connected in parallel to the liquid crystal capacitance provided between the first pixel electrode 15 and the common electrode 21. The capacitive element 16 is provided in the layer between the TFT 30 and the capacitance line 8.

[0036] Here, although illustration is omitted, the above-described second pixel electrode 19, like the first pixel electrode 15, together with the driving transistor TFT 30, the capacitive element 16, the scanning line 3, the data line 6, and the capacitance line 8, constitutes a pixel circuit in the peripheral region S. The pixel circuit has the same circuit configuration as the pixel circuit including the first pixel electrode 15, but does not contribute to the display of the liquid crystal device 100 and has a function of attracting ionic impurities in the liquid crystal layer 50 to the peripheral region S.

[0037] The configuration of the alignment films 18, 22, etc. in the liquid crystal device 100 will be described with reference to FIG. 4. FIG. 4 is a cross-section of a region including the sealant 60 and the liquid crystal layer 50 near the data line driving circuit 101 in the liquid crystal device 100 shown in FIG. 1. The cross-section includes the direction of oblique evaporation of the second vapor deposition film 18b and the fourth vapor deposition film 22b in a planar manner and is along a plane orthogonal to the XY plane. The direction of oblique evaporation is, for example, a direction including the upper right corner and the lower left corner of the display region E in a planar manner. In FIG. 4, illustration of some configurations of the element substrate 10 and the counter substrate 20 is omitted. Also, in FIG. 4, for the sake of illustration, the second pixel electrode 19 is shown integrally, but actually, in the above cross-section, the second pixel electrode 19 is divided at a plurality of locations.

[0038] As shown in FIG. 4, the alignment film 18 of the element substrate 10 includes a first vapor deposition film 18a and a second vapor deposition film 18b disposed between the first vapor deposition film 18a and the liquid crystal layer 50. The first vapor deposition film 18a covers a first pixel electrode 15 (not shown) and a second pixel electrode 19 provided in the same layer as the first pixel electrode 15, and is disposed above them.

[0039] The alignment film 22 of the counter substrate 20 includes a third vapor deposition film 22a and a fourth vapor deposition film 22b disposed between the third vapor deposition film 22a and the liquid crystal layer 50. The third vapor deposition film 22a covers the common electrode 21 and is disposed in the -Z direction of the common electrode 21.

[0040] The first vapor deposition film 18a is formed by vacuum deposition from the +Z direction with respect to the main surface of the element substrate 10. The first vapor deposition film 18a includes a plurality of columns whose major axis direction is along the Z axis. The third vapor deposition film 22a is formed by vacuum deposition from the -Z direction with respect to the main surface of the counter substrate 20. The third vapor deposition film 22a includes a plurality of columns whose major axis direction is along the Z axis. Silicon oxide, aluminum oxide, magnesium oxide, etc. are adopted as the formation materials of the first vapor deposition film 18a and the third vapor deposition film 22a.

[0041] The second vapor deposition film 18b is disposed to cover the upper part of the first vapor deposition film 18a. The thickness of the second vapor deposition film 18b, that is, the distance in the direction along the Z axis, is thinner than the thickness of the first vapor deposition film 18a. The second vapor deposition film 18b includes a plurality of columns whose major axis direction intersects the main surface of the element substrate 10 at an angle θα. The major axis direction of the columns of the second vapor deposition film 18b intersects the direction along the Z axis, which is the thickness direction of the liquid crystal layer 50, at an angle of (90 - θα)°.

[0042] The columns of the second vapor deposition film 18b are columnar crystals of silicon oxide. The columns are formed by a vacuum deposition method. Specifically, the columns of the second vapor deposition film 18b are formed by oblique deposition of silicon oxide from a direction that forms an acute angle with the direction of the angle θα.

[0043] The fourth vapor deposition film 22b is disposed to cover the -Z direction of the third vapor deposition film 22a. The thickness of the fourth vapor deposition film 22b, that is, the distance in the direction along the Z-axis, is thinner than the thickness of the third vapor deposition film 22a. The fourth vapor deposition film 22b includes a plurality of columns whose major axis direction intersects the main surface of the counter substrate 20 at an angle θβ. The major axis direction of the columns of the fourth vapor deposition film 22b intersects the direction along the Z-axis, which is the thickness direction of the liquid crystal layer 50, at an angle (90 - θβ)°.

[0044] The columns of the fourth vapor deposition film 22b are columnar crystals of silicon oxide. The columns are formed by a vacuum vapor deposition method. Specifically, the columns of the fourth vapor deposition film 22b are formed by obliquely depositing silicon oxide from a direction that forms an acute angle with the direction of the angle θβ. Note that the angle θβ may be equal to the angle θα.

[0045] According to the configuration of the alignment films 18 and 22, it becomes possible to align the liquid crystal 50a by the plurality of columns of the second vapor deposition film 18b and the fourth vapor deposition film 22b. Further, it becomes possible to form the alignment films 18 and 22 by a dry process.

[0046] The tilt direction of the pretilt of the liquid crystal 50a is set such that, for example, the azimuth angle formed with the Y-axis is 45°. The tilt direction of the pretilt is defined by the deposition direction when the second vapor deposition film 18b and the fourth vapor deposition film 22b are formed by oblique vapor deposition.

[0047] In the liquid crystal device 100, polarizing elements (not shown) are respectively arranged and used on the incident side and the emission side of the above-described light L. The two polarizing elements are arranged in the liquid crystal device 100 such that the transmission axis or the absorption axis of one polarizing element is parallel to the X-axis or the Y-axis, and the transmission axes or the absorption axes of the two polarizing elements are orthogonal to each other.

[0048] When forming the second vapor deposition film 18b and the fourth vapor deposition film 22b, the vapor deposition direction of the oblique vapor deposition is made to coincide, in a planar manner, with the inclination direction of the pretilt of the desired liquid crystal 50a. In the present embodiment, the second vapor deposition film 18b and the fourth vapor deposition film 22b are arranged such that the azimuth angle of the pretilt of the liquid crystal 50a intersects the transmission axis or absorption axis of the two polarizing elements at 45°. Thereby, when a driving voltage is applied between the first pixel electrode 15 and the common electrode 21 to drive the liquid crystal layer 50, the liquid crystal 50a falls in the inclination direction of the pretilt, and a high transmittance is obtained.

[0049] The surfaces of the element substrate 10 and the counter substrate 20 are subjected to surface treatment with a silane coupling agent. Specifically, an organopolysiloxane film is provided on the surfaces of the second vapor deposition film 18b of the element substrate 10 and the fourth vapor deposition film 22b of the counter substrate 20 using a silane coupling agent.

[0050] The silane coupling agent bonds silanol groups to the silicon oxide of the second vapor deposition film 18b and the fourth vapor deposition film 22b and undergoes dehydration condensation. Thereby, an organopolysiloxane film in which hydrophobic groups are oriented is formed at the interface with the liquid crystal layer 50 on the surface side. By this surface treatment, the contact angle of the surfaces of the second vapor deposition film 18b and the fourth vapor deposition film 22b with respect to water increases. Therefore, the photochemical reaction between the liquid crystal 50a and the alignment films 18 and 22 can be suppressed, and the light resistance of the liquid crystal device 100 can be improved. As a method of surface treatment with a silane coupling agent, a known method can be adopted.

[0051] By the above surface treatment, the contact angle of the surfaces of the alignment films 18 and 22 facing the liquid crystal layer 50 with respect to water is set to 50° or more. Thereby, the photochemical reaction between the liquid crystal 50a and the alignment films 18 and 22 is further suppressed, and the light resistance of the liquid crystal device 100 can be improved. The above contact angle is preferably 60° or more and 90° or less. When the above contact angle is 60° or more, the water repellency of the alignment films 18 and 22 increases, and the light resistance can be further improved. When the above contact angle is 90° or less, the uneven distribution of ionic impurities is suppressed, and the display quality of the liquid crystal device 100 can be improved. The contact angle of the alignment films 18 and 22 with respect to water is measured in accordance with JIS R3257; 1999.

[0052] The counter substrate 20 has a cut portion 24 formed of a light-shielding metal film or the like. The cut portion 24 is disposed in the +Z direction with respect to the common electrode 21. Planarly, the cut portion 24 overlaps with the second pixel electrode 19. Therefore, even if the second pixel electrode 19 is driven and the ionic impurities in the liquid crystal layer 50 are attracted to the second pixel electrode 19, the display quality of the liquid crystal device 100 is ensured.

[0053] The arrangement of the first pixel electrode 15, the second pixel electrode 19, etc. will be described with reference to FIG. 5. In FIG. 5, the region F in FIG. 1 is enlarged and shown. Also, in FIG. 5, for ease of viewing the figure, the illustration of some configurations such as the scanning line driving circuit 102 is omitted. Further, in FIG. 5, for the sake of illustration, the shapes and sizes of the TFTs 30b, 30c, and 30d described later are made different from the actual ones. Note that the following description regarding FIG. 5 will describe the state in plan view unless otherwise specified.

[0054] As shown in FIG. 5, in the liquid crystal device 100, a peripheral region S is disposed surrounding the display region E. The peripheral region S is a region between the outer peripheral edge of the display region E and the inner peripheral edge of the sealing material 60. In the peripheral region S, second pixel electrodes 19a, 19b, 19c, and 19d are disposed as the second pixel electrode 19. The second pixel electrodes 19a, 19b, 19c, and 19d are driven alternately by the TFT 30 and the TFTs 30b, 30c, and 30d described later.

[0055] A plurality of second pixel electrodes 19a are arranged to surround the display area E in a frame shape. The second pixel electrode 19a is substantially square in plan view and has the same shape as the first pixel electrode 15. Corresponding to each of the plurality of second pixel electrodes 19a, a TFT 30 (not shown), which is a driving transistor, is arranged. The TFT 30 of the second pixel electrode 19a is provided at a position that does not overlap with peripheral circuits such as the scanning line driving circuit 102 and inspection circuit 103, and wirings such as the wiring 107 in plan view.

[0056] A plurality of second pixel electrodes 19b are arranged via the second pixel electrodes 19a in the -X direction of the display area E and the +X direction of the display area E (not shown). Specifically, among the plurality of second pixel electrodes 19a, the second pixel electrodes 19b are arranged in the -X direction of each of the second pixel electrodes 19a that are located in the most -X direction and arranged along the Y-axis. Also, among the plurality of second pixel electrodes 19a, the second pixel electrodes 19b are arranged in the +X direction of each of the second pixel electrodes 19a that are located in the most +X direction and arranged along the Y-axis.

[0057] The second pixel electrode 19b is an elongated rectangular shape along the X-axis. In the second pixel electrode 19b, the length along the Y-axis is equal to the length along the Y-axis of the second pixel electrode 19a, and the length along the X-axis is longer than the length along the X-axis of the second pixel electrode 19a.

[0058] Corresponding to each of the plurality of second pixel electrodes 19b, a TFT 30b, which is a driving transistor, is arranged. The TFT 30b of the second pixel electrode 19b is provided at a position that does not overlap with peripheral circuits such as the scanning line driving circuit 102 in plan view. Specifically, in the second pixel electrode 19b located in the -X direction of the display area E, the TFT 30b is provided near the +X-direction end. Also, although not shown, in the second pixel electrode 19b located in the +X direction of the display area E, the TFT 30b is provided near the -X-direction end.

[0059] Here, the arrangement of the TFT30b is not limited to the above as long as it does not overlap with peripheral circuits such as the scanning line driving circuit 102 in a planar manner. For example, in the second pixel electrode 19b located in the -X direction of the display area E, the TFT30b may be provided near the end in the -X direction, and in the second pixel electrode 19b located in the +X direction of the display area E, the TFT30b may be provided near the end in the +X direction. Each of the individual second pixel electrodes 19b may be driven by a plurality of TFT30b provided at positions that do not overlap with the peripheral circuits.

[0060] The second pixel electrode 19c is arranged at the four corners of the peripheral area S. Specifically, one second pixel electrode 19c is arranged at each of the four corners, and a total of four are provided. The second pixel electrode 19c is rectangular, and the length in the direction along the X-axis is equal to the length in the direction along the X-axis of the second pixel electrode 19b, and the length in the direction along the Y-axis is equal to the length in the direction along the Y-axis of the second pixel electrode 19d described later.

[0061] Corresponding to each of the second pixel electrodes 19c at the four corners of the peripheral area S, a TFT30c, which is a driving transistor, is arranged. The TFT30c of the second pixel electrode 19c is provided at a position that does not overlap with peripheral circuits such as the scanning line driving circuit 102 in a planar manner. Specifically, in the second pixel electrode 19c shown in FIG. 5, the TFT30c is arranged at the corner in the +X direction and +Y direction, which is near the four corners of the display area E. The other three TFT30c corresponding to the second pixel electrodes 19c (not shown) are arranged near the four corners of the display area E in the same manner as above.

[0062] Each of the four second pixel electrodes 19c may be electrically connected to a plurality of TFT30c provided at positions that do not overlap with the peripheral circuits. The second pixel electrode 19c has a larger planar area compared to the second pixel electrodes 19a, 19b, and 19d. Therefore, by electrically connecting to a plurality of driving transistors TFT30c, the driving load can be reduced.

[0063] A plurality of TFTs 30c electrically connected to the second pixel electrode 19c are preferably adjacent to each other in a direction along the X-axis. The direction along the X-axis, although not shown in the figure, is the direction in which the scanning line 3 electrically connected to the source region of the TFT 30c extends in the liquid crystal device 100. According to this, since a plurality of driving transistors TFT 30c are adjacent to each other in the extending direction of the scanning line 3, it is possible to facilitate the drive control of the second pixel electrodes 19c at the four corners. Note that the number of TFTs 30c electrically connected to the second pixel electrode 19c is not limited to two, and may be three or more.

[0064] A plurality of second pixel electrodes 19d are arranged via the second pixel electrode 19a in the -Y direction of the display region E and in the +Y direction of the display region E (not shown). Specifically, among the plurality of second pixel electrodes 19a, the second pixel electrode 19d is arranged in the -Y direction of each of the second pixel electrodes 19a that are located in the most -Y direction and arranged along the X-axis. Also, among the plurality of second pixel electrodes 19a, the second pixel electrode 19b is arranged in the +Y direction of each of the second pixel electrodes 19a that are located in the most +Y direction and arranged along the X-axis.

[0065] The second pixel electrode 19d has an elongated rectangular shape in a direction along the Y-axis. In the second pixel electrode 19d, the length in the direction along the X-axis is equal to the length in the direction along the X-axis of the second pixel electrode 19a, and the length in the direction along the Y-axis is longer than the length in the direction along the Y-axis of the second pixel electrode 19a.

[0066] Corresponding to each of the plurality of second pixel electrodes 19d, a TFT 30d which is a driving transistor is arranged. The TFT 30d of the second pixel electrode 19d is provided at a position that does not overlap with peripheral circuits such as the scanning line driving circuit 102 and the inspection circuit 103, and wirings such as the wiring 107 in a planar manner. Specifically, in the second pixel electrode 19d located in the -Y direction of the display region E, the TFT 30d is provided near the +Y direction end portion. Also, although not shown in the figure, in the second pixel electrode 19d located in the +Y direction of the display region E, the TFT 30d is provided near the -Y direction end portion. Note that each of the second pixel electrodes 19d may be driven by a plurality of TFTs 30d provided at positions that do not overlap with the above-described peripheral circuits and wirings.

[0067] Note that the arrangement of the TFTs 30d is not limited to the above as long as it does not overlap with peripheral circuits such as the scanning line drive circuit 102 in a planar manner. For example, in the second pixel electrode 19d located in the -Y direction of the display region E, the TFT 30d may be provided near the end in the -Y direction, and in the second pixel electrode 19d located in the +Y direction of the display region E, the TFT 30d may be provided near the end in the +Y direction.

[0068] The arrangements of the TFTs 30b, 30c, and 30d are not limited to the above, and they can be arranged at any position as long as they do not overlap with peripheral circuits and wirings in a planar manner. As a result, the second pixel electrodes 19b, 19c, and 19d extend from a region that does not overlap with peripheral circuits such as the scanning line drive circuit 102 in a planar manner to a region that overlaps with the peripheral circuits. Here, the second pixel electrodes 19b, 19c, and 19d may extend from a region that does not overlap with the peripheral circuits and wirings in a planar manner to a region that overlaps therewith, and further extend to a region that does not overlap.

[0069] Note that in the liquid crystal device 100, the second pixel electrode 19a may be omitted. That is, the second pixel electrodes 19b, 19c, and 19d may be arranged so as to be adjacent to the outer peripheral edge of the display region E.

[0070] According to the present embodiment, the following effects can be obtained.

[0071] It is possible to suppress the occurrence of display defects caused by ionic impurities. Specifically, the TFTs 30, 30b, 30c, 30d, which are the driving transistors of the second pixel electrode 19, are provided at positions that do not overlap the peripheral circuit in a planar manner. The second pixel electrodes 19b, 19c, 19d are provided to extend from a region that does not overlap the peripheral circuit in a planar manner to a region that overlaps. Therefore, even if the peripheral circuits such as the scan line driving circuit 102 and the inspection circuit 103 and the second pixel electrodes 19b, 19c, 19d are arranged to overlap in a planar manner, it is possible to drive the second pixel electrode 19. By the way, ionic impurities are generally likely to be induced at the corners of the display region E when the pixel electrode is driven. Therefore, by arranging the second pixel electrode 19 that is driven by alternating current in the peripheral region S, ionic impurities are induced outside the display region E. As a result, the occurrence of display defects caused by ionic impurities is suppressed. Therefore, it is possible to provide a liquid crystal device 100 that suppresses the occurrence of display defects caused by ionic impurities.

[0072] 2. Second Embodiment In this embodiment, an active drive type liquid crystal device including a TFT as an electro-optical device is exemplified. The liquid crystal device 200 according to this embodiment is different from the liquid crystal device 100 of the first embodiment in that it includes a peripheral electrode in the peripheral region S. In the following description, the same reference numerals are used for the same components as those in the first embodiment, and redundant descriptions are omitted.

[0073] The configuration of the liquid crystal device 200 of this embodiment will be described with reference to FIG. 6. In FIG. 6, the region corresponding to FIG. 5 of the first embodiment in the liquid crystal device 200 is enlarged and shown. Also, in FIG. 6, for ease of viewing the figure, the illustration of some configurations such as the scan line driving circuit 102 is omitted. The following description regarding FIG. 6 is assumed to be in a top view state unless otherwise specified.

[0074] As shown in FIG. 6, in the liquid crystal device 200, a peripheral region S is arranged surrounding the display region E. In the peripheral region S, a peripheral electrode 211 and second pixel electrodes 19a, 219b, 219c, 219d are arranged. The second pixel electrodes 219b, 219c, 219d surround the second pixel electrode 19a. A plurality of second pixel electrodes 219b are arranged in the -X direction and the +X direction (not shown) with respect to the second pixel electrode 19a, and a plurality of second pixel electrodes 219d are arranged in the -Y direction and the +Y direction (not shown) with respect to the second pixel electrode 19a. One second pixel electrode 219c is arranged at each of the four corners of the peripheral region S.

[0075] The second pixel electrode 219b has an elongated rectangular shape along the X-axis direction. In the second pixel electrode 219b, the length in the direction along the Y-axis is equal to the length in the direction along the Y-axis of the second pixel electrode 19a, and the length in the direction along the X-axis is longer than the length in the direction along the X-axis of the second pixel electrode 19a.

[0076] The second pixel electrode 219d has an elongated rectangular shape along the Y-axis direction. In the second pixel electrode 219d, the length in the direction along the X-axis is equal to the length in the direction along the X-axis of the second pixel electrode 19a, and the length in the direction along the Y-axis is longer than the length in the direction along the Y-axis of the second pixel electrode 19a.

[0077] The second pixel electrode 219c has a rectangular shape, and the length in the direction along the X-axis is equal to the length in the direction along the X-axis of the second pixel electrode 219b, and the length in the direction along the Y-axis is equal to the length in the direction along the Y-axis of the second pixel electrode 219d.

[0078] The peripheral electrode 211 surrounds the second pixel electrodes 219b, 219c, 219d in a frame shape. That is, in the peripheral region S, the second pixel electrodes 19a, 219b, 219c, 219d are arranged on the display region E side, and the peripheral electrode 211 is arranged on the sealant 60 side.

[0079] The first pixel electrode 15, the second pixel electrodes 19a, 219b, 219c, 219d, and the peripheral electrode 211 are provided in the same layer among the layers laminated in the direction along the Z axis of the element substrate 10 and are made of the same material. The second pixel electrodes 19a, 219b, 219c, 219d, and the peripheral electrode 211 can be manufactured in the same process as the first pixel electrode 15, and the manufacturing process of the liquid crystal device 200 can be simplified.

[0080] The second pixel electrodes 219b, 219c, 219d are driven by AC by TFTs which are driving transistors (not shown). The TFTs of the second pixel electrodes 219b, 219c, 219d are provided at the same positions as the TFTs 30b, 30c, 30d of the first embodiment respectively. The TFTs do not overlap with peripheral circuits such as the scanning line drive circuit 102 and the inspection circuit 103 and wirings such as the wiring 107 in a plane. That is, the second pixel electrodes 219b, 219c, 219d extend from a region not overlapping with the peripheral circuit in a plane to a region overlapping with the peripheral circuit. Note that the second pixel electrodes 219b, 219c, 219d may be electrically connected to a plurality of TFTs.

[0081] The peripheral electrode 211 is provided between the region where the second pixel electrodes 219b, 219c, 219d are arranged and the sealant 60. The outer periphery of the peripheral electrode 211 follows the inner periphery of the sealant 60. Although not shown, the peripheral electrode 211 is electrically connected to any of external connection terminals 104 different from those electrically connected to the vertical conduction part 106. Thereby, a DC potential of positive or negative polarity is applied to the peripheral electrode 211 with respect to the common electrode potential applied to the common electrode 21.

[0082] The above DC potential is a fixed potential whose polarity is set according to the ionic impurities to be attracted. Specifically, a positive DC potential is applied when the ionic impurities are negative ions, and a negative DC potential is applied when the ionic impurities are positive ions. The application of the DC potential to the peripheral electrode 211 may be performed constantly or intermittently during the operation of the liquid crystal device 200.

[0083] When a DC potential is applied to the peripheral electrode 211 during the operation of the liquid crystal device 200, a horizontal electric field is generated between the second pixel electrodes 219b, 219c, 219d and the peripheral electrode 211. Ionic impurities are attracted from the display area E to the peripheral area S side when the second pixel electrodes 19a, 219b, 219c, 219d are driven. Further, the ionic impurities are attracted to the peripheral electrode 211 by the above-mentioned horizontal electric field and move away from the display area E.

[0084] The width of the peripheral electrode 211 is narrower in a planar manner than the width of the area where the second pixel electrodes 19a, 219b, 219c, 219d are arranged. The width referred to here means the distance across along the X-axis and the distance across along the Y-axis with respect to the object. That is, the width of the peripheral electrode 211 is formed shorter in the entire circumference with respect to the width of the area where the second pixel electrodes 19a, 219b, 219c, 219d are arranged. Thereby, it becomes difficult for the ionic impurities attracted to the peripheral electrode 211 to protrude into the display area E.

[0085] According to the present embodiment, in addition to the effects of the first embodiment, since ionic impurities are attracted to the peripheral electrode 211, the occurrence of display defects due to ionic impurities can be further suppressed.

[0086] 3. Third Embodiment In the present embodiment, an active drive type liquid crystal device including a TFT is exemplified as the electro-optical device. The liquid crystal device 300 according to the present embodiment is obtained by changing the forms of the second pixel electrodes 219b, 219d, and the peripheral electrode 211 with respect to the liquid crystal device 200 of the second embodiment. In the following description, the same reference numerals are used for the same constituent parts as in the first embodiment and the second embodiment, and redundant descriptions are omitted.

[0087] The configuration of the liquid crystal device 300 according to this embodiment will be described with reference to FIG. 7. In FIG. 7, an area corresponding to FIG. 5 of the first embodiment in the liquid crystal device 300 is enlarged and shown. Further, in FIG. 7, for ease of viewing the drawing, the illustration of some configurations such as the scanning line driving circuit 102 is omitted. Note that the following description regarding FIG. 7 is based on a plan view unless otherwise specified.

[0088] As shown in FIG. 7, in the peripheral region S, a peripheral electrode 311 and second pixel electrodes 19a, 319b, 319c, 319d are arranged. The second pixel electrodes 319b, 319c, 319d are arranged on the outer peripheral side of the second pixel electrode 19a. A plurality of second pixel electrodes 319b are arranged in the -X direction and a +X direction (not shown) with respect to the second pixel electrode 19a, and a plurality of second pixel electrodes 319d are arranged in the -Y direction and a +Y direction (not shown) with respect to the second pixel electrode 19a. One second pixel electrode 319c is arranged at each of the four corners of the peripheral region S.

[0089] The second pixel electrode 319b has an elongated rectangular shape along the X-axis. In the second pixel electrode 319b, the length in the direction along the Y-axis is equal to the length in the direction along the Y-axis of the second pixel electrode 19a, and the length in the direction along the X-axis is longer than the length in the direction along the X-axis of the second pixel electrode 19a.

[0090] The second pixel electrode 319d has an elongated rectangular shape along the Y-axis. In the second pixel electrode 319d, the length in the direction along the X-axis is equal to the length in the direction along the X-axis of the second pixel electrode 19a, and the length in the direction along the Y-axis is longer than the length in the direction along the Y-axis of the second pixel electrode 19a.

[0091] The second pixel electrode 319c has a rectangular shape, the length in the direction along the X-axis is equal to the length in the direction along the X-axis of the second pixel electrode 319b, and the length in the direction along the Y-axis is equal to the length in the direction along the Y-axis of the second pixel electrode 319d.

[0092] The peripheral electrode 311 is disposed in the region between the sealing material 60 and the second pixel electrode 19a, and surrounds the second pixel electrode 19a in a frame shape. The peripheral electrode 311 has a plurality of protruding portions 311px that protrude into the region where the second pixel electrode 319b is disposed, and has a plurality of protruding portions 311py that protrude into the region where the second pixel electrode 319d is disposed.

[0093] The plurality of protruding portions 311px are provided to protrude in a comb shape in the +X direction from the inner peripheral edge of the peripheral electrode 311. Although not shown, in the +X direction of the display region E, the plurality of protruding portions 311px are provided to protrude in a comb shape in the -X direction from the inner peripheral edge of the peripheral electrode 311. Each individual protruding portion 311px is an elongated rectangular shape along the X-axis, and one end portion is continuously formed with the peripheral electrode 311 main body. In the protruding portion 311px, the length in the direction along the X-axis is equal to the length in the direction along the X-axis of the second pixel electrode 319b, and the length in the direction along the Y-axis is equal to the length in the direction along the Y-axis of the second pixel electrode 19a. The plurality of protruding portions 311px and the plurality of second pixel electrodes 319b are arranged alternately in the direction along the Y-axis.

[0094] The plurality of protruding portions 311py are provided to protrude in a comb shape in the +Y direction from the inner peripheral edge of the peripheral electrode 311. Although not shown, in the +Y direction of the display region E, the plurality of protruding portions 311py are provided to protrude in a comb shape in the -Y direction from the inner peripheral edge of the peripheral electrode 311. Each individual protruding portion 311py is an elongated rectangular shape along the Y-axis, and one end portion is continuously formed with the peripheral electrode 311 main body. In the protruding portion 311py, the length in the direction along the Y-axis is equal to the length in the direction along the Y-axis of the second pixel electrode 319d, and the length in the direction along the X-axis is equal to the length in the direction along the X-axis of the second pixel electrode 19a. The plurality of protruding portions 311py and the plurality of second pixel electrodes 319d are arranged alternately in the direction along the X-axis.

[0095] Here, the number and planar shape of the protruding portions 311px and 311py are not limited to the above. Also, a peripheral electrode may be disposed in the region where the second pixel electrode 319c is disposed, instead of the second pixel electrode 319c. A DC potential of positive or negative polarity is applied to the peripheral electrode.

[0096] The first pixel electrode 15, the second pixel electrodes 19a, 319b, 319c, 319d, and the peripheral electrode 311 including the protruding portions 311px, 311py are provided in the same layer among the layers stacked in the direction along the Z axis of the element substrate 10 and are made of the same material. The second pixel electrodes 19a, 319b, 319c, 319d, and the peripheral electrode 311 can be manufactured in the same process as the first pixel electrode 15, and the manufacturing process of the liquid crystal device 300 can be simplified.

[0097] The second pixel electrodes 319b, 319c, 319d are driven alternately by TFTs which are driving transistors (not shown). The TFTs of the second pixel electrodes 319b, 319c, 319d are provided at the same positions as the TFTs 30b, 30c, 30d of the first embodiment, respectively. The TFTs do not overlap planar with peripheral circuits such as the scanning line drive circuit 102 and the inspection circuit 103, and wirings such as the wiring 107. That is, the second pixel electrodes 319b, 319c, 319d extend from a region that does not overlap planar with the peripheral circuit to a region that overlaps with the peripheral circuit. Note that the second pixel electrodes 319b, 319c, 319d may be electrically connected to a plurality of TFTs.

[0098] The peripheral electrode 311 is provided between the region where the second pixel electrode 19a is disposed and the sealant 60. The outer periphery of the peripheral electrode 311 follows the inner periphery of the sealant 60. Although not shown, the peripheral electrode 311 is electrically connected to any one of external connection terminals 104 which are different from those electrically connected to the vertical conduction portion 106. Thereby, a DC potential of positive or negative polarity is applied to the peripheral electrode 311 with respect to the common electrode potential applied to the common electrode 21. Thereby, the peripheral electrode 311 has a function of attracting ionic impurities in the same manner as the peripheral electrode 211 of the second embodiment.

[0099] According to the present embodiment, in addition to the effects of the second embodiment, the following effects can be obtained. Near the boundaries between the peripheral electrode 311 and the second pixel electrodes 19a, 319b, 319c, 319d, it is possible to suppress the occurrence of the phenomenon that ionic impurities are baked in. Specifically, in the peripheral electrode 311, a plurality of protrusions 311px, 311py are respectively arranged so as to bite into the regions of the second pixel electrodes 319b, 319d. Therefore, compared with the case where the boundary line between the second pixel electrodes 319b, 319d and the peripheral electrode 311 is planar and linear, the total length of the above boundary line becomes longer. Therefore, the uneven distribution of the ionic impurities attracted to the peripheral electrode 311 is alleviated, and the occurrence of the above baking phenomenon is suppressed.

[0100] 4. Fourth Embodiment As an example of the electronic device according to the present embodiment, a projection display device 1000 is illustrated.

[0101] As shown in FIG. 8, the projection display device 1000 includes a lamp unit 1001, dichroic mirrors 1011, 1012 of a color separation optical system, three liquid crystal devices 1B, 1G, 1R, reflection mirrors 1111, 1112, 1113, relay lenses 1121, 1122, 1123, a dichroic prism 1130 of a color synthesis optical system, and a projection lens 1140 of a projection optical system.

[0102] The lamp unit 1001 is, for example, a discharge-type light source. The type of the light source is not limited to this, and a solid light source such as a light-emitting diode or a laser may be adopted.

[0103] The light emitted from the lamp unit 1001 is separated by the dichroic mirrors 1011, 1012 into three-color light of different wavelength ranges. The three-color light is red light R that is approximately red, green light G that is approximately green, and blue light B that is approximately blue.

[0104] The dichroic mirror 1011 transmits the red light R and reflects the green light G and the blue light B whose wavelengths are shorter than that of the red light R. The red light R transmitted through the dichroic mirror 1011 is reflected by the reflection mirror 1111 and enters the liquid crystal device 1R. The green light G reflected by the dichroic mirror 1011 is reflected by the dichroic mirror 1012 and then enters the liquid crystal device 1G. The blue light B reflected by the dichroic mirror 1011 passes through the dichroic mirror 1012 and enters the relay lens system 1120.

[0105] The relay lens system 1120 includes relay lenses 1121, 1122, 1123 and reflection mirrors 1112, 1113. Since the optical path of the blue light B is longer than those of the green light G and the red light R, the light beam is likely to become larger. Therefore, the relay lens 1122 is used to suppress the expansion of the light beam. The blue light B incident on the relay lens system 1120 is converged by the relay lens 1121, reflected by the reflection mirror 1112, and converges in the vicinity of the relay lens 1122. Then, the blue light B passes through the reflection mirror 1113 and the relay lens 1123 and enters the liquid crystal device 1B.

[0106] In the projection display device 1000, the liquid crystal devices 1R, 1G, 1B, which are light modulation devices, are applied with the liquid crystal device as the electro-optical device of the above embodiment. The liquid crystal device of the above embodiment may be applied to one or more of the liquid crystal devices 1R, 1G, 1B, and it is more preferable to be applied to all of them.

[0107] Each of the liquid crystal devices 1R, 1G, 1B is electrically connected to the upper circuit of the projection display device 1000. Therefore, when each image signal for specifying the gradation levels of the red light R, the green light G, and the blue light B is supplied from an external circuit to the upper circuit and processed, the liquid crystal devices 1R, 1G, 1B are driven and each color light is modulated.

[0108] The red light R, green light G, and blue light B modulated by the liquid crystal devices 1R, 1G, and 1B are incident on the dichroic prism 1130 from three directions. The dichroic prism 1130 combines the incident red light R, green light G, and blue light B. In the dichroic prism 1130, the red light R and the blue light B are reflected at 90 degrees, and the green light G is transmitted. As a result, the red light R, green light G, and blue light B are combined as display light for displaying a color image and are incident on the projection lens 1140.

[0109] The projection lens 1140 is disposed facing the outside of the projection display device 1000. The display light is enlarged and emitted through the projection lens 1140, and a projected image is projected onto the screen 1200 which is the projection target.

[0110] In this embodiment, an example is illustrated in which the contact angle of the surface of the alignment films 18 and 22 facing the liquid crystal layer 50 with respect to water is 50° or more by the above surface treatment, but the present invention is not limited thereto. The contact angle by the surface treatment may be 30° to 40°, and may be about 20° depending on the content of the surface treatment.

[0111] In this embodiment, the projection display device 1000 is illustrated as an electronic device, but the present invention is not limited thereto. The electro-optical device of the present invention may be applied to electronic devices such as a projection type HUD (Head-Up Display), a direct-view type HMD (Head Mounted Display), a personal computer, a digital camera, and a liquid crystal television.

[0112] According to this embodiment, the diffusion of ionic impurities in the liquid crystal layer 50 is suppressed, and the display quality of the liquid crystal devices 1R, 1G, and 1B is improved. Therefore, it is possible to provide the projection display device 1000 having excellent quality of the projected image.

Explanation of Reference Numerals

[0113] 1B, 1G, 1R... liquid crystal device, 3... scanning line, 15... first pixel electrode, 18, 22... alignment film, 18a... first vapor deposition film, 18b... second vapor deposition film, 19, 19a, 19b, 19c, 19d, 219b, 219c, 219d, 319b, 319c, 319d... second pixel electrode, 30, 30b, 30c, 30d... TFT as a driving transistor, 50... liquid crystal layer, 50a... liquid crystal, 100, 200, 300... liquid crystal device as an electro-optical device, 102... scanning line driving circuit as a peripheral circuit, 103... inspection circuit as a peripheral circuit, 211, 311... peripheral electrode, 311px, 311py... protruding portion, 1000... projection display device as an electronic device, E... display area, S... peripheral area.

Claims

1. In a display area, a first pixel electrode, and outside the display area, a plurality of second pixel electrodes and a scanning line driving circuit are provided, one of the plurality of second pixel electrodes is arranged along the display area in a first direction so as to overlap the scanning line driving circuit in a plan view and is provided so as to extend along a second direction intersecting the first direction, and the other pixel electrodes of the plurality of second pixel electrodes are arranged along the display area in the second direction and are provided so as to extend along the first direction, a width of the one pixel electrode in the first direction is narrower than a length of the one pixel electrode in the second direction, and a width of the other pixel electrode in the second direction is narrower than a length of the other pixel electrode in the first direction, an electro-optical device.

2. A light-shielding cut portion is provided outside the display area, the plurality of second pixel electrodes are provided so as to overlap the cut portion in a plan view, the electro-optical device according to Claim 1.

3. The plurality of second pixel electrodes have pixel electrodes having the same planar shape as the first pixel electrode between the one pixel electrode and the display area and between the other pixel electrode and the display area, respectively, the electro-optical device according to Claim 1.

4. An electrode to which a positive or negative potential with respect to a common electrode potential is applied is provided outside an area where the plurality of second pixel electrodes are provided, the electro-optical device according to Claim 1.

5. The first pixel electrode, the second pixel electrode, and the electrode are provided in the same layer and contain the same material, the electro-optical device according to Claim 4.

6. In a planar view, a width of an area where the plurality of second pixel electrodes are provided is wider than a width of the electrode, the electro-optical device according to Claim 4 or Claim 5.

7. A liquid crystal layer, and an alignment film are provided, the alignment film includes a first vapor deposition film and a second vapor deposition film provided between the first vapor deposition film and the liquid crystal layer, an organopolysiloxane film is provided on the second vapor deposition film, the electro-optical device according to any one of Claims 1 to 6.

8. A sealing material is provided, the plurality of second pixel electrodes are provided at corners of an area between the display area and the sealing material in a planar view and are each electrically connected to a plurality of transistors, the electro-optical device according to any one of Claims 1 to 7.

9. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The plurality of transistors are adjacent to each other in the direction in which the scanning line extends, Claim 8. The electro-optical device according to Claim 10 The electrode has a plurality of protruding portions that protrude along the second pixel electrode into the region where the plurality of second pixel electrodes are provided, The electro-optical device according to claim 4 having. Claim 11 An electronic device including the electro-optical device according to any one of claims 1 to 10.

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