JP2006047530A - Electro-optical device and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electro-optical device which can reduce the resistance changes of the wiring on a board, and an electronic device using this electro-optical device. <P>SOLUTION: The wiring 11 of a liquid crystal device 1 is formed on a 1st board 5. Since the outer angles θ10, θ11 of the corners 24, 25 of the wiring 11 are all less than 270°, the signals outputted to the common electrode 9 from the IC 10 on the 1st board 5 are not reflected at the corner 24 and the resistance of the signal wiring does not increase. Accordingly, the change of the characteristic impedance is reduced for the wiring 11 of the 1st board 5 and it becomes possible to improve the clearness of the liquid crystal display screen. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electro-optical device used for a personal computer, a mobile phone, and the like, and an electronic apparatus using the electro-optical device.

2. Description of the Related Art Conventionally, electro-optical devices such as liquid crystal devices are known as display devices for electronic devices such as personal computers (hereinafter abbreviated as personal computers) and mobile phones. In this electro-optical device, for example, two glass substrates are provided to face each other with a seal member interposed therebetween, and liquid crystal is sealed between the two glass substrates. For example, a driver IC (Integrated Circuit) for driving a liquid crystal and a plurality of electrodes are provided on one glass substrate, and a plurality of electrodes are provided on the other glass substrate so as to cross these electrodes. ing. From the driver IC, an output wiring in which ITO (Indium Tin Oxide), Cr (Chromium), etc. are laminated is derived. These output wirings are bent at 90 degrees or at an acute angle and connected to each electrode for convenience of layout and restrictions on output wiring space. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 2002-268079 (paragraph [0022], FIG. 1).

  However, in the above-described technology, the output wiring connected to the driver IC is bent so that the external angle is 270 degrees or more. Therefore, the bent portion becomes a discontinuity point of characteristic impedance, and the signal is a high-speed signal. For example, in the case of a signal of 100 megahertz or a signal faster than that, there is a problem that the signal is reflected or the change in the wiring resistance becomes large, so that the image display becomes unclear.

  SUMMARY An advantage of some aspects of the invention is that it provides an electro-optical device capable of reducing a change in resistance of wiring on a substrate and an electronic apparatus using the electro-optical device.

  In order to achieve the above object, an electro-optical device according to a main aspect of the present invention includes a first substrate holding an electro-optical material, a first wiring provided on the first substrate, and the first wiring. In the electro-optical device including the first electrode electrically connected to the first wiring, the first wiring includes a plurality of first bent portions, and outer angles of all the first bent portions. Is characterized by its angle being less than 270 degrees or arcuate.

  Here, the “outer angle” refers to an angle formed on the side where the first wiring bends and protrudes, for example. For example, the outer angle of the bent portion bent at 100 degrees is 260 degrees. “Arc” means a shape like a quarter circle, for example.

  In the present invention, since the outer angles of all the first bent portions of the first wiring provided on the first substrate are smaller than 270 degrees or arcuate, the first wiring is formed on the substrate, for example. It is possible to prevent the signal output to the first electrode from being reflected at the bent portion of the first wiring and to increase the change in wiring resistance, and to clarify the image.

  According to an aspect of the present invention, an outer angle of at least one of the plurality of first bent portions has a hypotenuse. Here, the “slanted side” refers to the end side of the first wiring provided obliquely with respect to the side of the first wiring that forms the outer angle of the bent portion. Thereby, the signal can be reflected in the direction in which the signal should be transmitted by the hypotenuse. Therefore, since the signal can be transmitted efficiently, the reflection of the signal in the direction other than the direction to be transmitted can be reduced.

  According to an aspect of the present invention, an outer angle of the plurality of first bent portions is 215 degrees or more and 240 degrees or less. For example, when the outer angle is smaller than 215 degrees, the change in impedance can be reduced, but wiring becomes difficult and the degree of freedom in design is limited. Further, when the outer angle is larger than 240 degrees, the change in impedance cannot be sufficiently reduced.

  According to an aspect of the present invention, the first wiring has a straight portion connected to the first bent portion, and the straight portion has a direction orthogonal to the extending direction of the straight portion. Further, from the cross-sectional area of the cross section in a direction perpendicular to the first substrate, the surface of the first substrate is in the direction of the line segment connecting the vertex of the inner angle and the vertex of the outer angle in the first bent portion. The cross-sectional area of the cross section in the direction perpendicular to is larger. Thereby, for example, the conductivity at the first bent portion can be improved without changing the width of the straight portion.

  According to an aspect of the present invention, the first wiring has a straight portion connected to the first bent portion, and the first bent portion and the straight portion have a first conductive property. And a second conductive layer made of a material having a resistance lower than that of the first conductive layer, and the thickness of the second conductive layer of the first bent portion is the thickness of the straight portion. It is characterized by being thicker than the film thickness of the second conductive layer. As a result, the second conductive layer having a lower resistance than the first conductive layer is increased at the bent portion from the straight portion, and the conductivity at the first bent portion can be improved.

  According to an aspect of the present invention, the first conductive layer is an indium tin oxide layer, and the second conductive layer is a chromium layer. Thereby, indium tin oxide, which is more excellent in conductivity than chromium in the bent portion than the straight portion, increases, and the conductivity in the first bent portion can be improved.

  According to an aspect of the present invention, an outer angle of at least one of the plurality of first bent portions has an arc shape, and an inner angle corresponding to the outer angle is opposed to the arc shape. It has a circular arc shape. Here, the “inner angle” means an angle on the opposite side to the side where the first wiring is bent and protrudes, and is an angle obtained by subtracting the outer angle from 360 degrees. Thereby, the reflection to the direction other than the direction which should transmit a signal can be reduced by reflecting a signal using an arc shape.

  According to one aspect of the present invention, the apparatus includes a second substrate facing the first substrate, and the first substrate has a protruding portion protruding from the second substrate, and the protruding portion includes: A driving element connected to the first wiring for driving the electro-optic material is provided. As a result, for example, it is possible to prevent a signal input to and output from the driving element that drives the liquid crystal from being reflected by the first bent portion, or to prevent a change in wiring resistance from increasing. Therefore, the liquid crystal display screen can be further clarified.

  According to one embodiment of the present invention, a second electrode provided on the second substrate, a second electrode provided on the second substrate and connected to the second electrode, and a plurality of second electrodes And a second wiring having a bent portion, wherein the outer angles of all the second bent portions are smaller than 270 degrees or arcuate. As a result, it is possible to prevent the signal from being reflected at the second bent portion of the second wiring on the second substrate and the change in the wiring resistance from being increased, so that the first wiring and the second wiring can be prevented. The overall wiring resistance including can be reduced.

  According to one embodiment of the present invention, a second electrode provided on the second substrate, a second electrode provided on the first substrate and electrically connected to the second electrode, And a second wiring having a second bent portion, wherein the outer angles of all the second bent portions are smaller than 270 degrees or arcuate. As a result, it is possible to prevent the signal from being reflected at the second bent portion of the second wiring on the first substrate and the change in the wiring resistance from becoming large, so that the first wiring and the second wiring can be prevented. The overall wiring resistance including can be reduced.

  According to one aspect of the present invention, the driving device includes a third substrate connected to the projecting portion, a plurality of third bent portions provided on the third substrate, And third wirings connected to each other, wherein the outer angles of all the third bent portions are smaller than 270 degrees or arcuate. As a result, even on the third substrate, it is possible to prevent a signal from being reflected at the third bent portion of the third wiring and a change in wiring resistance from becoming large. Therefore, it is possible to reduce changes in wiring resistance and characteristic impedance in the entire electro-optical device including the third wiring as well as the first wiring and the second wiring.

  An electronic apparatus according to another aspect of the invention includes the above-described electro-optical device.

  In the present invention, an electro-optical device that can reduce the resistance of the wiring on the substrate and the like can be provided, so that the display performance and the like of the electronic apparatus can be easily improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, a liquid crystal device as an example of an electro-optical device, specifically, a reflective transflective passive matrix liquid crystal device, and an electronic apparatus using the liquid crystal device will be described. However, it is not limited to this. Moreover, in the following drawings, in order to make each structure easy to understand, the actual structure and the scale and number of each structure are different.

  (First embodiment)

  FIG. 1 is a partial schematic plan view of a liquid crystal device according to a first embodiment of the present invention, FIG. 2 is a schematic plan view showing a first substrate of the liquid crystal device, and FIG. 3 is a schematic diagram showing a second substrate of the liquid crystal device. It is a top view.

  (Configuration of liquid crystal device)

  As shown in FIG. 1, the liquid crystal device 1 includes a liquid crystal panel 2 and a circuit board 3 provided in connection with the liquid crystal panel 2. The liquid crystal device 1 is provided with an illumination device such as a backlight (not shown), a frame for holding the liquid crystal panel 2 and the illumination device, and other incidental mechanisms as necessary.

  For example, as shown in FIG. 1, the liquid crystal panel 2 is sealed in a gap between the first substrate 5 and the second substrate 6 which are a pair of substantially rectangular substrates bonded together via a seal material 4. And an electro-optic material such as STN (Super Twisted Nematic) liquid crystal 7.

  For example, the sealing material 4 has a rectangular frame shape as shown in FIG. 1, and the region S is formed by the frame-shaped sealing material 4 sandwiched between the first substrate 5 and the second substrate 6. In the region S, a liquid crystal 7 that is an electro-optical material is sealed, and a liquid injection port for injecting the liquid crystal 7 is sealed by a sealing material 4.

  For example, as shown in FIGS. 1 and 2, the first substrate 5 includes a plurality of striped common electrodes 9, a liquid crystal driving IC 10, each common electrode 9 as a first wiring, and a liquid crystal driving IC 10. A plurality of wirings 11 to be connected, a wiring 12 for connecting each segment electrode and a driving IC, which will be described later, via a conductive member, a wiring 13 for inputting a signal from the outside to the liquid crystal driving IC 10, and the like are provided.

  Here, a plurality of common electrodes 9 are formed in a stripe shape so as to be parallel to the X direction. The common electrode 9 is made of, for example, an ITO transparent conductive material, and an overcoat layer and an alignment film (not shown) are formed on the common electrode 9.

  Further, the first substrate 5 has a length in the Y direction longer than that of the second substrate 6 and is provided with an overhanging portion 5a that protrudes from one end portion of the second substrate 6. The liquid crystal driving IC 10 includes: It is provided on the overhang portion 5a.

  The liquid crystal driving IC 10 is used to output a liquid crystal driving signal or the like to the common electrode 9 and a segment electrode 14 described later when receiving various signals from the circuit board 3, for example.

  As shown in FIGS. 1 and 2, the wiring 11 is provided with a left frame portion 15 and a right frame portion 16 in which the first substrate 5 and the second substrate 6 overlap each other on both outer sides in the Y direction of the sealing material 4. In order to connect the common electrode 9 and the liquid crystal driving IC 10, for example, the common electrode 9 is drawn from the upper half common electrode 9 to the right frame portion 16 and the lower half of the driving IC side is connected. It is routed from the common electrode 9 to the left frame portion 15.

  Further, the wiring 11 includes wiring portions 17 to 21 as wirings connected to, for example, one common electrode 9, and bent portions 22 and 23 that are bent portions of the wiring 11 are provided in the right frame portion 16. .

  FIG. 4 is an enlarged plan view of the bent portion 22 of the wiring 11 and the bent portion of the wiring 12, and FIG. 5 is an enlarged plan view of the bent portion 23 of the wiring 11.

  The bent portion 22 is a portion straddling the wiring portions 17 to 19 so as to include the corners 24 and 25. As shown in FIG. 4, the wiring portion 17 has, for example, an ACF (Anisotropic) on a bump (not shown) of the liquid crystal driving IC 10. It is provided so as to be drawn out in the X direction from a connection terminal connected via a conductive film, and is connected to the wiring section 18.

  Further, the wiring portion 18 is provided by bending (bending in the Y direction) toward the common electrode 9 so that the angle θ10 on the outer side (opposite the region S) intersecting the wiring portion 17 is less than 270 degrees. Connected to the wiring portion 19.

  Furthermore, the wiring part 19 is provided in the Y direction by bending so that the angle θ11 on the outer side (opposite the region S) intersecting the wiring part 18 is less than 270 degrees.

  Here, the outer angles θ10, θ11, etc. of the angles 24, 25 are preferably set to 215 degrees or more and 240 degrees or less, more preferably 225 degrees. For example, when the outer angle is smaller than 215 degrees, the change in impedance can be reduced, but it becomes difficult to route the wiring 11 and the like, and the degree of freedom in design is limited. Further, when the outer angle is larger than 240 degrees, the change in impedance cannot be sufficiently reduced. On the other hand, if it is 225 degrees, the wiring length can be shortened, and the change in the wiring width at the corner (the difference between the length of the inner corner apex and the outer corner apex and the wiring width) is small, so the impedance change can be further increased. Can be reduced.

  The wiring portion 18 is provided to be bent toward the common electrode 9 (bent in the Y direction) so that the inner angle (region S side) intersecting with the wiring portion 17 is an obtuse angle. The wiring portion 19 is bent and provided in the Y direction so that the inner side (region S side) angle θ2 intersecting the wiring portion 18 becomes an obtuse angle. Here, the obtuse angle is an angle greater than 90 degrees and less than 180 degrees.

  Further, as shown in FIG. 5, the bent portion 23 is a portion straddling the wiring portions 19 to 21 so as to include corners 26 and 27, and the wiring portion 20 is outside (region S) intersecting the wiring portion 19. The outer angle θ12 on the opposite side is bent to the side closer to the common electrode 9 so as to be less than 270 degrees, and is connected to the wiring portion 21. The wiring portion 21 is provided so that the outer angle θ13 on the outer side (opposite to the protruding portion) intersecting the wiring portion 20 is less than 270 degrees, and is connected to the common electrode 9.

  As shown in FIG. 5, the wiring portion 20 is provided to be bent toward the side closer to the common electrode 9 so that the inner side (region S side) intersecting with the wiring portion 19 has an obtuse angle. The wiring portion 21 is provided such that an inner side (extension portion side) angle θ4 intersecting the wiring portion 20 is an obtuse angle, and is connected to the common electrode 9.

  Furthermore, the wiring 11 routed around the left frame portion 15 is also provided on the first substrate 5 so that the corner of the bent portion becomes an obtuse angle.

  Similarly to the wiring 11, the wiring 12 has a wiring portion 28 connected to the liquid crystal driving IC 10 and an outer angle θ15 on the outside (opposite side of the wiring 11) intersecting the wiring portion 28 of less than 270 degrees (outer angle θ15 The wiring portion 29 is provided so as to be bent so that the angle θ5 on the opposite side is an obtuse angle), and the bent portion 30 is formed by the wiring portion 28 and the wiring portion 29 in the same manner as the bent portions 22 and 23. ing.

  Furthermore, the wiring 13 connects a connection terminal (not shown) on the input side of the liquid crystal driving IC 10 and a wiring of the circuit board 3 described later.

  In addition, as a constituent material of the first substrate 5 and the second substrate 6, for example, a light transmissive material such as glass or synthetic resin is used.

  Next, on the second substrate 6, as shown in FIGS. 1 and 3, a plurality of striped segment electrodes 14 provided on the second substrate 6 crossing the common electrode 9, and each segment A wiring 31 connected to the electrode 14 is provided. The wiring 31 includes a wiring portion 32 connected to one end of the segment electrode 14 and an outer angle θ9 on the outer side (opposite the region S) intersecting the wiring portion 32 of less than 270 degrees (an angle on the opposite side of the outer angle θ9). and a wiring portion 33 provided so that θ6 becomes an obtuse angle. The wiring portion 32 and the wiring portion 33 form a bent portion 34.

  Note that the number of the common electrodes 9 and the segment electrodes 14 can be appropriately changed according to the resolution of the liquid crystal device 1 and the size of the display area.

  The sealing material 4 is provided with a conductive member (not shown) for electrically connecting the wiring 12 and the wiring 31 provided so as to overlap each other as shown in FIG. The wiring 12 and the wiring 31 are electrically connected.

  Next, the cross-sectional structure of the wiring 11 will be described with reference to FIG.

  6 is a cross-sectional view of the wiring 11 shown in FIG.

  As shown in FIG. 6, the wiring 11 and the like have a substantially trapezoidal cross section, and a layer 38 of a transparent conductive material having a lower resistance than the layer 39 of the conductive material is laminated so as to cover the layer 39 of the conductive material. ing.

  Here, for example, indium tin oxide is used as the transparent conductive material. Chrome or the like is used as the conductive material. At this time, the height (thickness) in the Z direction of the layer 38 of the transparent conductive material (ITO) and the layer 39 of the conductive material (chrome) is set to be substantially the same, for example.

  In the above description, the chromium layer 39 is covered with the ITO layer 38. However, a tantalum layer may be provided under the chromium layer 39 as an underlayer. Alternatively, the chrome layer 39 may be eliminated, and only the ITO layer may be used. By forming the tantalum layer, the chromium layer can be formed more stably, and by covering with the ITO layer 38, the chromium layer 39 can be prevented from being damaged.

  Moreover, although not shown in figure in the inner surface of any one of the 1st board | substrate 5 and the 2nd board | substrate 6, a base layer, a reflection layer, a colored layer, a light shielding layer, etc. are formed as needed.

  Next, the circuit board 3 is provided with, for example, a base substrate 40. On the base substrate 40, wirings 41 are formed and electronic components such as a capacitor and an IC (not shown) are mounted. Here, the wiring 41 is connected to the wiring 13 on the first substrate 5 via the ACF, for example. As a constituent material of the base substrate 40, a flexible film-like member is used.

  Next, the operation of the liquid crystal device 1 of the present embodiment will be described with reference to the drawings.

  For example, as shown in FIG. 1, an electric signal is output from the liquid crystal driving IC 10 to the wiring portion 17, reaches the corner 24 of the bent portion 22, and is less likely to be attenuated by reflection or resistance of the bent portion 22 and delivered to the next wiring portion 18. Furthermore, the resistance due to reflection and attenuation can be reduced at the corner 25 as well. The same applies to the corners 26 and 27 of the bent portion 23 below. As a result, an electrical signal with little attenuation is finally input from the wiring portion 21 to the common electrode.

  Further, as shown in FIG. 1, an electric signal is output from the liquid crystal driving IC 10 to the wiring portion 28, reaches the corner 36 of the bent portion 30, and is received by the next wiring portion 29 with less reflection and attenuation due to the resistance of the bent portion 30. Passed.

  Then, the electrical signal transferred to the wiring portion 29 is also less affected by reflection and attenuation at the corner 37 of the bent portion 34 of the second substrate 6 via the conductive member, and the segment electrode is less attenuated. An electric signal is input.

  As a result, the liquid crystal is controlled by an electric signal that does not attenuate the liquid crystal at the position where the segment electrode and the common electrode intersect, and a clear image is displayed on the display surface of the liquid crystal panel 2.

  This is the end of the description of the operation of the liquid crystal device 1.

  Thus, according to the present embodiment, the wiring 11 of the liquid crystal device 1 is provided on the first substrate 5, and the outer angles θ10, θ11, etc. of the corners 24, 25 of the wiring 11 are all less than 270 degrees. It is possible to prevent, for example, a signal output from the liquid crystal driving IC 10 to the common electrode 9 on the first substrate 5 from being reflected at the corner 24 or the like, or a change in signal wiring resistance from increasing. Thereby, the change of the characteristic impedance of the wiring 11 of the first substrate 5 can be reduced. Therefore, the liquid crystal display screen can be further clarified.

  Further, since the outer angle θ15 of the wiring 12 on the first substrate 5 and the outer angle θ9 of the wiring 31 on the second substrate 6 are all less than 270 degrees, similarly, the first substrate 5 and the second substrate 6 are the same. It is possible to prevent, for example, signals output from the liquid crystal driving IC 10 to the common electrode 9 and the segment electrode 14 from being reflected at the corners 36, 37, etc., and a change in signal wiring resistance from increasing.

  Next, Modifications 1 to 6 of the first embodiment of the liquid crystal device according to the present invention will be described focusing on differences from the first embodiment. In addition, about the component which is common in the component of 1st Embodiment, the code | symbol same as the component of 1st Embodiment is attached | subjected, and the description is abbreviate | omitted.

  (Modification 1)

  FIG. 7 is a partial schematic plan view showing the liquid crystal device of the first modification.

  The liquid crystal device 101 according to the first modification is different from the first embodiment in the wiring 141 provided on the circuit board 103 connected to the first substrate 5. On the circuit board 103, an IC 110 that outputs a signal to the liquid crystal driving IC 10 provided on the first substrate 5 is provided. The liquid crystal driving IC 10 and the IC 110 are connected via a wiring 141.

  Specifically, the bent portion 130 is formed in a portion straddling the wiring portions 128, 129, and 132 so as to include the corners 136 and 137, and is connected to the bumps (not shown) of the IC 110 via the ACF. The outer angle θ16 on the left side of the wiring part 128 provided so as to be drawn out in the direction and the corner 136 intersecting the wiring part 128 (left side of the corresponding wiring in the figure) is less than 270 degrees (the opposite side of the outer angle θ16) And the outer angle θ17 on the right side of the angle 137 intersecting the wiring portion 129 (the right side of the corresponding wiring in the drawing) is less than 270 degrees (outer angle θ17). And the wiring part 132 provided so that the angle θ8 on the opposite side is an obtuse angle).

  As described above, in the first modification, the outer angles θ16 and θ17 of all the corners of the wiring 141 on the circuit board 103 are set to be less than 270 degrees, so that the signal is reflected at the corner of the wiring 141 and the change in the wiring resistance increases. This can be prevented. Therefore, not only the wiring on the liquid crystal panel side but also the resistance of the liquid crystal device 101 including the wiring on the circuit board 103 and the change in characteristic impedance can be reduced.

  (Modification 2)

  8 is an enlarged plan view of the bent portion of the first wiring of the liquid crystal device according to the second modification of the present invention, and FIG. 9 is an enlarged plan view of the bent portion on the segment electrode side of the first wiring of the liquid crystal device according to the second modification. FIG.

  As shown in FIG. 8, in the liquid crystal device 201 of the second modification, the bent portion 222 of the wiring 213 drawn out from the liquid crystal driving IC 10 has an arc shape like the bent portion 22 of the first embodiment.

  Specifically, the wiring 213 includes the wiring portions 217 to 221.

  As shown in FIG. 8, the wiring part 217, which is a straight line part of the wiring 213, is provided so as to be drawn out in the X direction from, for example, a connection terminal connected to a bump (not shown) of the liquid crystal driving IC 10 via an ACF. And connected to the wiring portion 218.

  The wiring part 218 is formed in, for example, an arc shape of a substantially quarter circle so as to send a signal in a direction substantially orthogonal to the wiring part 217, and is connected to the wiring part 219. The outer edge of the wiring part 218 has an arc shape, and the inner edge corresponding to the outer edge is arc-shaped so as to face the outer edge.

  In addition, as shown in FIG. 9, the bent portion 223 provided near the end portion of the common electrode 9 is similarly arcuate.

  Specifically, the wiring part 219 is connected to the wiring part 220, and is formed in, for example, an arc of a substantially quarter circle so as to send a signal in a direction substantially orthogonal to the wiring part 219. Are connected to the wiring part 221. The outer edge of the wiring part 220 has an arc shape, and the inner edge corresponding to the outer edge has an arc shape so as to face the outer edge.

  Similarly, the bent portion 230 of the wiring 212 connected to the segment electrode 14 has an arc shape.

  As described above, the second modification reduces the reflection in a direction other than the direction in which the signal should be transmitted by reflecting the signal from the input direction of the wiring provided in the liquid crystal panel by the arc-shaped wiring portions 218, 220 and the like. , It can be reliably transmitted in the output direction of the wiring.

  (Modification 3)

  FIG. 10 is an enlarged cross-sectional view of the bent portion of the wiring of the liquid crystal device of Modification 3 according to the present invention.

  The liquid crystal device 401 according to the third modification differs in the laminated structure of the transparent conductive material at the bent portion of the wiring drawn from the liquid crystal driving IC 10, for example. The film thickness in the Z direction of the bent part 22 of the wiring is set to be thicker than the film thickness of the wiring part 19 or the like that becomes a straight part. For example, the thickness H of the ITO layer 438 such as the bent portion 22 is set to be thicker than the thickness of the ITO layer of the wiring portion 19 in the Z direction.

  As described above, in the third modification, the thickness of the wiring is set to be thicker at the bent portion than the straight portion, and the conductivity at the bent portion is improved by increasing the conductivity, for example, indium tin oxide. be able to.

  (Modification 4)

  FIG. 11 is an enlarged plan view of the bent portion of the wiring of the liquid crystal device of the fourth modification.

  As shown in FIG. 11, in the liquid crystal device 501 of the fourth modification, for example, only on the side where the bent part 522 protrudes are provided angles 526 and 527 in which the angles of the outer angles θ18 and θ19 are set to 225 degrees. ing. The bent portion 522 has a first end edge 523 on the side protruding from the X direction in the Y direction, and a second end edge 524 on the opposite side to the protruding side. For example, as shown in FIG. 12, a hypotenuse 525 is provided on the side of the edge 523 along the arrow F direction, which is approximately 45 degrees from the X-axis direction.

  As described above, in the fourth modification example, since the oblique side 525 is provided on the first end 523 side of the bent portion 522, the signal transmitted in the X direction is reflected by the oblique side 525 along the arrow F direction, and the Y direction is surely achieved. Therefore, the reflection in the direction other than the direction in which the signal should be transmitted can be reduced, and the shape of the hypotenuse 525 is straight, so that it is easy to manufacture and the cost can be reduced. For example, the angles of the outer angles θ18 and θ19 of the corners 526 and 527 of the bent portion 522 are set to 225 degrees. For this reason, the wiring length can be shortened, and the change in the wiring width at the bent portion 522 (the difference between the length of the inner corner vertex and the outer corner vertex and the wiring width) is small, so that the impedance change can be further reduced.

  (Modification 5)

  FIG. 12 is an enlarged plan view of the bent portion of the wiring of the liquid crystal device according to the fifth modification.

  In the liquid crystal device 550 of the fifth modification, the bent portion 551 of the wiring has a second end edge 552 provided on the side opposite to the first end edge 523 side, and the first end edge 523 is provided. And a hypotenuse 525 provided on the side of the head. The bent portion 551 of the wiring includes a hypotenuse 556 provided in the direction of the arrow F parallel to the hypotenuse 525 on the second end edge 552 side.

  As described above, in the fifth modification, since the corner portion on the second end edge 552 side is eliminated by providing the hypotenuse 556, the wiring width at the bent portion 551 and the wiring width at the straight portion are substantially the same. Thus, the resistance change at the bent portion 551 can be further reduced.

  (Modification 6)

  13 is an enlarged plan view of the bent portion of the wiring of the liquid crystal device according to the sixth modified example of the present invention, FIG. 14 is a cross-sectional view taken along the line CC of the bent portion of the liquid crystal device according to the fifth modified example, and FIG. It is DD sectional drawing of the bending part of the wiring of this liquid crystal device.

  In the liquid crystal device 601 of the sixth modified example, as shown in FIGS. 13, 14, and 15, the wiring includes a straight linear portion 617 and a bent portion 622 sandwiched between the linear portions 619, and the bent portion 622 is provided. The cross-sectional area S1 in the Z direction perpendicular to the surface of the first substrate 5 in the direction of the line segment connecting the vertex N of the inner angle and the vertex M of the outer angle is the extending direction of the straight portion 617 in the straight portion 617 ( The cross-sectional area S2 of the cross section in the Z direction perpendicular to the first substrate 5 and perpendicular to the (X direction) is configured. Further, the ITO layer 639 of the bent portion 622 is thicker than the thickness of the ITO layer 638 of the straight portions 617 and 619 in the Z direction. Note that the width of the bent portion 622 may be increased. The chromium layer 640 is wired so as to be bent at a right angle from the X direction to the Y direction without changing the cross-sectional area at the bent portion 622, for example, but may be formed in the same manner as the ITO layer.

  In this way, in the sixth modification, the cross-sectional area S1 is made larger at the bent portion 622 than the straight portions 617 and 619, and the ITO layer 639 of the bent portion 622 is larger than the thickness of the ITO layer 638 of the straight portions 617 and 619. Since the thickness of the one is increased, the change in the wiring resistance of the signal can be more effectively reduced.

  Second Embodiment Electronic Device

  Next, an electronic apparatus according to the second embodiment of the present invention that includes the liquid crystal device 1, 101, 201, 401, 501 or 601 described above will be described.

  FIG. 16: is a schematic block diagram which shows the whole structure of the display control system of the electronic device concerning the 2nd Embodiment of this invention.

  The electronic device 300 includes a liquid crystal panel 2 and a display control circuit 390 as shown in FIG. 16 as a display control system, for example. The display control circuit 390 includes a display information output source 391, a display information processing circuit 392, a power supply circuit 393, and the like. A timing generator 394 and the like are included.

  Further, the liquid crystal panel 2 includes a drive circuit 361 including a liquid crystal drive IC 10 that drives the display region I.

  The display information output source 391 includes a memory such as a ROM (Read Only Memory) or a RAM (Random Access Memory), a storage unit such as a magnetic recording disk or an optical recording disk, and a tuning circuit that tunes and outputs a digital image signal. It has. Further, the display information output source 391 is configured to supply display information to the display information processing circuit 392 in the form of a predetermined format image signal or the like based on various clock signals generated by the timing generator 394.

  The display information processing circuit 392 includes various well-known circuits such as a serial-parallel conversion circuit, an amplification / inversion circuit, a rotation circuit, a gamma correction circuit, and a clamp circuit, and executes processing of input display information to display the image. Information is supplied to the drive circuit 361 together with the clock signal CLK. The power supply circuit 393 supplies a predetermined voltage to each component described above.

  As described above, according to the present embodiment, in the liquid crystal panel 2 provided in the electronic device 300, the output signal from the drive circuit 361 is reflected by the bent portion 22 of the wiring 13 or the bent portion 29 of the wiring 39. It is possible to prevent an increase in the wiring resistance at the bent portions 22 and 9A. Therefore, a high-quality image or the like can be displayed without deteriorating the output signal from the drive circuit 361.

  Specific electronic devices include touch panels equipped with liquid crystal devices in addition to mobile phones and personal computers, projectors, liquid crystal televisions and viewfinder types, video tape recorders with direct view of monitors, car navigation systems, pagers, electronic notebooks, A calculator, a word processor, a workstation, a video phone, a POS terminal, etc. are mentioned. Needless to say, for example, the liquid crystal devices 1, 101, 201, 401, 501 or 601 described above can be applied as display units of these various electronic devices.

  Note that the electro-optical device and the electronic apparatus of the present invention are not limited to the above-described examples, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

  For example, all of the electro-optical devices described above are liquid crystal devices having a liquid crystal panel, but inorganic or organic electroluminescence devices, plasma display devices, electrophoretic display devices, devices using electron-emitting devices (Field Emission Display and Surface). -Various electro-optical devices such as a Conduction Electron-Emitter Display) may be used.

  In the above-described embodiments and modifications, the passive matrix type liquid crystal device has been described. However, the present invention is not limited to this. For example, a thin film transistor element active matrix type or thin film diode element active matrix type liquid crystal device may be used. Furthermore, not only a transflective type but also a transmissive type and a reflective type may be used. Also in this case, it is possible to reduce the change in resistance and the change in characteristic impedance at the bent portion of the wiring on the substrate.

  Furthermore, in the above-described embodiments and modifications, for example, COG (Chip On Glass) in which the liquid crystal liquid crystal driving IC 10 is mounted on the protruding portion 5a of the first substrate 5 has been described. However, the present invention is not limited to this. For example, as shown in FIG. 17, a COF (Chip On Film) liquid crystal device 400 in which a driving element 410 is mounted on a circuit board 403 connected to the projecting portion 5a is also used. The invention can be applied. Even in this case, by setting the outer angle of the corners of the wirings 404 and 405 on the circuit board 403 to be less than 270 degrees, it is possible to reduce changes in wiring resistance and changes in characteristic impedance.

  Further, in the above-described embodiments and modifications, the wiring 11 connected to the common electrode 9 on the liquid crystal driving IC 10 side among the plurality of wirings 13 is routed to the left frame portion 15 side, and the common electrode on the sealing material 4 side. 9 shows an example in which the wiring 11 connected to 9 is routed around the right frame portion 16. However, for example, the wirings 11 may be provided on the left frame portion 15 and the right frame portion 16 alternately in a left and right manner in a comb shape. As a result, it is possible to reduce the change in resistance and the change in characteristic impedance at the wiring bent portion of a wide variety of liquid crystal devices.

  Furthermore, in the above-described embodiment and modification, an example in which the first substrate 5 is provided with the overhanging portion 5a has been described. However, the present invention is not limited to this. For example, the second substrate also includes an overhanging portion that protrudes from the first substrate, and the liquid crystal driving IC is provided in the overhanging portion of the second substrate. The bent portion of the connected wiring may have an outer angle of less than 270 degrees or an arc shape. As a result, it is possible to reduce the change in resistance and the change in characteristic impedance at the wiring bent portion of a wide variety of liquid crystal devices.

1 is a partial schematic plan view of a liquid crystal device according to a first embodiment. It is a schematic plan view which shows the 1st board | substrate of the liquid crystal device of 1st Embodiment. It is a schematic plan view which shows the 2nd board | substrate of the liquid crystal device of 1st Embodiment. FIG. 2 is an enlarged plan view of a lower bent portion of the wiring of FIG. 1. FIG. 2 is an enlarged plan view of an upper bent portion of the wiring of FIG. 1. It is BB sectional drawing of the wiring shown in FIG. FIG. 10 is a partial schematic plan view showing a liquid crystal device according to Modification 1. 12 is an enlarged plan view of a lower bent portion of a wiring of a liquid crystal device according to a second modification. FIG. 10 is an enlarged plan view of an upper bent portion of a wiring according to Modification 2. FIG. FIG. 10 is an enlarged cross-sectional view of a bent portion of wiring of a liquid crystal device according to Modification 3. FIG. 10 is an enlarged plan view of a bent portion of wiring of a liquid crystal device according to modification example 4; FIG. 10 is an enlarged plan view of a bent portion of wiring of a liquid crystal device according to modification example 5; FIG. 10 is an enlarged plan view of a bent portion of wiring of a liquid crystal device according to modification example 6; It is CC sectional drawing of FIG. It is DD sectional drawing of FIG. It is a block diagram of the electronic device provided with the liquid crystal device which concerns on 2nd Embodiment. It is a partial schematic plan view of a liquid crystal device of COF.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 101, 201, 401, 501, 601 Liquid crystal device, 2 Liquid crystal panel, 5 1st board | substrate, 6 2nd board | substrate, 3, 103 Circuit board, 9 Common electrode, 10 Liquid crystal drive IC, 11 Wiring, 14 Segment electrode, 22, 23, 30, 34, 130, 222, 223, 522, 622 Bent part, 24-27, 36, 37 angle, 42 wiring, 40 base substrate, 141 wiring, 300 electronic device, 361 drive circuit , Θ9 ~ θ19 Outside angle

Claims (12)

An electro-optical device comprising: a first substrate holding an electro-optical material; a first wiring provided on the first substrate; and a first electrode electrically connected to the first wiring. In
The first wiring includes a plurality of first bent portions,
An electro-optical device characterized in that all the first bent portions have outer angles that are smaller than 270 degrees or arcuate.   2. The electro-optical device according to claim 1, wherein an outer angle of at least one of the plurality of first bent portions has a hypotenuse.   3. The electro-optical device according to claim 1, wherein an outer angle of each of the plurality of first bent portions is 215 degrees or more and 240 degrees or less. The first wiring has a straight portion connected to the first bent portion,
From the cross-sectional area of the cross section in the direction perpendicular to the extending direction of the linear portion and in the direction perpendicular to the first substrate, the vertex of the inner angle and the outer angle of the first bent portion 4. The cross-sectional area of a cross section in a direction of a line segment connecting the apexes and perpendicular to the surface of the first substrate is larger. 5. Electro-optic device. The first wiring has a straight portion connected to the first bent portion,
The first bent portion and the straight portion include a first conductive layer and a second conductive layer made of a material having a lower resistance than the first conductive layer,
4. The film thickness of the second conductive layer at the first bent portion is greater than the film thickness of the second conductive layer at the linear portion. 5. The electro-optical device according to Item. The first conductive layer is a layer of indium tin oxide;
The electro-optical device according to claim 5, wherein the second conductive layer is a chromium layer.   An outer angle of at least one of the plurality of first bent portions has an arc shape, and an inner angle corresponding to the outer angle has an arc shape facing the arc shape. The electro-optical device according to claim 1. A second substrate facing the first substrate;
The first substrate has an overhanging portion protruding from the second substrate,
8. The driving element for driving the electro-optic material connected to the first wiring is provided in the projecting portion. 9. Electro-optic device. A second electrode provided on the second substrate;
A second wiring provided on the second substrate and connected to the second electrode and having a plurality of second bent portions;
9. The electro-optical device according to claim 8, wherein the outer angles of all the second bent portions are smaller than 270 degrees or arcuate. A second electrode provided on the second substrate;
A second wiring provided on the first substrate and electrically connected to the second electrode and having a plurality of second bent portions;
9. The electro-optical device according to claim 8, wherein the outer angles of all the second bent portions are smaller than 270 degrees or arcuate. A third substrate connected to the overhang portion;
A third wiring provided on the third substrate, having a plurality of third bent portions and electrically connected to the driving element;
11. The electro-optical device according to claim 8, wherein the outer angles of all the third bent portions are smaller than 270 degrees or arcuate.   An electronic apparatus comprising the electro-optical device according to any one of claims 1 to 11.

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