JP5262031B2 - Electro-optical device and electronic apparatus including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize an electro-optical apparatus while improving the quality of a display image. <P>SOLUTION: The electro-optical apparatus is provided with a substrate (10), a plurality of scanning lines (6a) and a plurality of data lines (11a) which intersect with each other, a plurality of image signal lines (6) for supplying image signals, a sampling circuit (7) for sampling the image signals supplied to the image signal lines (6) and supplying the sampled image signals to the plurality of data lines (11a), a plurality of sampling signal lines (114) for supplying sampling signals to the sampling circuit (7), and a shield wire (606) arranged between a first layer on which the plurality of image signal lines (6) are formed and a second layer on which the plurality of sampling signal lines (114) are formed. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a technical field of an electro-optical device such as a liquid crystal device, and an electronic apparatus such as a liquid crystal projector including the electro-optical device.

  In this type of electro-optical device, for example, noise with respect to an image signal can be suppressed to improve the quality of a display image. For example, in Patent Document 1, the upper layer part of a plurality of signal lines is covered with a first shield part, and the influence of noise on the image signal is suppressed by interposing a second shield part at a key point between the signal lines. The technology to do is described.

JP 2007-41265 A

  However, according to the background art described above, there is a technical problem in that the influence of noise at a location where signal lines intersect, for example, is not sufficient. In addition, if the wiring interval is reduced due to the demand for miniaturization of the electro-optical device, the arrangement may be difficult, for example, it may be difficult to interpose the second shield part at a point between the signal lines. There is a technical problem.

  The present invention has been made in view of the above problems, for example, and provides an electro-optical device that can suppress the influence of noise and display a high-quality image and is suitable for downsizing, and an electronic apparatus including the same. This is the issue.

In order to solve the above-described problems, an electro-optical device according to an aspect of the invention includes a first substrate and a second substrate disposed to face the first substrate, and the first substrate has a plurality of scanning lines intersecting each other. And a plurality of data lines, a plurality of pixel electrodes provided corresponding to intersections of the plurality of scanning lines and the plurality of data lines, a plurality of image signal lines to which an image signal is supplied, and a sampling signal In response, a sampling circuit that samples image signals supplied to the plurality of image signal lines and supplies the sampling signals to the plurality of data lines, a plurality of sampling signal lines that supply the sampling signals to the sampling circuit, and A plurality of image signal lines; a shield layer disposed in a layer between the plurality of sampling signal lines; and a first layer disposed between layers of the sampling signal line and the shield layer An insulating layer; and a second interlayer insulating layer disposed between the image signal line and the shield layer. The second substrate is disposed to face the plurality of pixel electrodes, and has a common potential. There comprises a counter electrode applied, the image signal, the polarity inverted with respect to the common potential to the shield layer, the common potential is supplied.
Also, provided corresponding to the plurality of data lines, electrically connecting the plurality of sampling signal lines and the sampling circuit, and disposed on a layer opposite to the shield layer of the plurality of image signal lines. A plurality of relay wires, the plurality of relay wires extending so as to intersect with the plurality of image signal lines, and the sampling signal line extending so as to intersect with the plurality of image signal lines. The shield layer covers the plurality of image signal lines, and extends so as to intersect with the plurality of relay lines and the plurality of sampling signal lines.
The first substrate includes a counter electrode potential line electrically connected to the counter electrode, and the shield layer is a wiring layer branched from the counter electrode potential line.

  According to the electro-optical device of the present invention, a plurality of scanning lines and a plurality of data lines intersect each other in a pixel region on a substrate such as a quartz substrate, and a plurality of pixel electrodes correspond to each of the intersections. Is provided. Here, the “pixel area” does not mean an area of individual pixels, but means an entire area in which a plurality of pixels are arranged in a plane, and is typically an “image display area” or “display area”. It corresponds to. In the pixel region, for example, a plurality of pixel electrodes are arranged in a matrix.

  The sampling circuit samples the image signal supplied through the image signal line in accordance with the sampling signal supplied through the plurality of sampling signal lines, and supplies the sampled signal to the plurality of data lines. Specifically, for example, the sampling circuit has a source electrode electrically connected to the image signal line, a drain electrode electrically connected to the data line, and a gate electrode electrically connected to the sampling signal line. Each data line includes a sampling switch composed of a thin film transistor of one channel or both channels. When the supplied sampling signal is at a high level, an image signal is output to the data line. The sampling signal is typically a signal that is sequentially output from the data line driving circuit based on the shift register output, and is sequentially supplied to the plurality of sampling signal lines. At this time, when an image signal subjected to serial-parallel conversion or phase expansion is used, the same sampling signal is simultaneously supplied for each of a plurality of data lines.

  The shield wiring is disposed between the first layer provided with one or a plurality of image signal lines and the second layer provided with the sampling signal lines.

  According to the inventor's research, in general, high-frequency signals such as image signals are easily affected by noise, and even if the high-frequency signal wirings are spaced apart from each other in each layer, It is affected by noise at the intersection with the arranged wiring. On the other hand, for example, a shield portion or the like may be provided between the wirings because the wiring interval is narrowed with the demand for miniaturization of the electro-optical device or the number of wirings is increased with the demand for high definition of the display image. It turns out to be difficult.

  However, in the present invention, in the laminated structure constructed on the substrate, the shield wiring is arranged between the first layer provided with a plurality of image signal lines and the second layer provided with a plurality of sampling signal lines. ing. Thereby, the influence of noise on the image signal lines can be suppressed, and high-quality image display can be realized. In particular, it is possible to prevent the influence of noise at the intersection of the image signal line and the plurality of sampling signal lines. If the shield wiring is arranged on the upper layer or the lower layer of the first layer without any other conductive layer or signal wiring, that is, only through the interlayer insulating film, the influence of noise can be surely prevented. In addition, if the shield wiring is set to a ground potential, for example, the function of the shield wiring as an electromagnetic shield film can be enhanced.

  Moreover, since the shield wiring is a wiring, it can be dropped to a potential suitable for functioning as a shield, and can also be used as a power supply wiring or a signal wiring having a function other than the shield.

  Instead of the shield wiring, a shield electrode or a shield layer dedicated to the shield may be provided. Depending on the size of the shield electrode or shield layer, a floating potential may be used. At this time, the shield wiring, the shield electrode, or the shield layer may be dropped to a predetermined potential.

  Further, since it is not necessary to provide a shield portion between the wirings such as between the image signal lines, the wiring interval can be reduced and the number of wirings can be increased, and the electro-optical device can be downsized and the display image can be increased. Refinement can be realized.

  When the image signal is subjected to serial-parallel conversion (that is, phase expansion) and the number of image signal lines increases, for example, the image signal lines are formed in a plurality of layers, and each of the plurality of layers in which the image signal lines are formed A shield wiring may be provided between them.

  In one aspect of the electro-optical device of the present invention, the image signal line and the plurality of sampling signal lines are at least partially arranged in a region where the shield wiring is formed in a plan view on the substrate. ing.

  According to this aspect, the influence of noise can be suppressed at a higher level, and high-quality image display can be realized. In particular, if the shield wiring is extended so as to extend in the arrangement direction of the data lines (for example, the X direction or the horizontal direction), the portion extending in the arrangement direction of the image signal lines and the data lines of the sampling signal lines. The main portion with the portion extending in the direction along the direction (that is, the Y direction or the vertical direction, for example) can be arranged in the region where the shield wiring is formed in this way. Thus, the shielding effect by the shield wiring is fully exhibited.

  In another aspect of the electro-optical device of the present invention, the shield wiring is set to a predetermined potential.

  According to this aspect, since a predetermined potential is supplied to the shield wiring, the potential variation of the shield wiring is electromagnetic with respect to the image signal on the image signal line near the shield wiring and the sampling signal on the sampling signal line. It is possible to avoid adverse effects as noise. Further, it is possible to prevent the potential of the shield wiring from fluctuating due to electromagnetic interference from an image signal line, a sampling signal line, or the like. Therefore, the function of the shield wiring as an electromagnetic shield film can be enhanced. That is, the fluctuation of the potential of the shield wiring can suppress, for example, the occurrence of electromagnetic interference between two adjacent image signal lines via the shield wiring.

  Here, the “predetermined potential” according to the present invention means a potential fixed at least for a predetermined period regardless of the content of the image signal. For example, it may be a fixed potential that is completely fixed at a constant potential with respect to the time axis, such as a ground potential or a ground potential. Alternatively, like the common potential or the counter electrode potential, the time axis is fixed to the first fixed potential in the odd field period related to the image signal and fixed to the second fixed potential in the even field period. On the other hand, it may be a fixed potential fixed at a constant potential for a certain period.

In another aspect of the electro-optical device of the present invention, on the substrate, one interlayer insulating film disposed between the first layer and the shield wiring, and between the shield wiring and the second layer. According to this aspect, while maintaining the interlayer insulation between the first layer and the shield wiring, it is possible to take a suitable interlayer distance for the shield, An interlayer distance suitable for a shield can be obtained while maintaining interlayer insulation between two layers. Therefore, the influence of noise can be suppressed at a higher level, and high-quality image display can be realized. In addition, an increase in the height of the electro-optical device due to the provision of the shield wiring can be suppressed.

  In the aspect related to the serial-parallel conversion, the other conductive layer, the first layer, the shield wiring, and the second layer are stacked in this order via an interlayer insulating film on the substrate, The relay wiring and the parallel signal line may be electrically connected through a contact hole connecting the other conductive layer and the first layer.

  With this configuration, the relay wiring can have a larger interlayer distance from the sampling signal line than the image signal line, and the mutual electromagnetic noise between the image signal and the sampling signal on the relay wiring is reliably suppressed. it can.

  In order to solve the above problems, an electronic apparatus according to the present invention includes the above-described electro-optical device according to the present invention (including various aspects thereof).

  According to the electronic apparatus of the present invention, since it includes the above-described electro-optical device of the present invention, it can display a high-quality image and is suitable for miniaturization, a projection display device, a mobile phone, and an electronic notebook. Various electronic devices such as a word processor, a viewfinder type or a monitor direct-view type video tape recorder, a workstation, a videophone, a POS terminal, and a touch panel can be realized.

  The operation and other advantages of the present invention will become apparent from the best mode for carrying out the invention described below.

  Hereinafter, embodiments of the electro-optical device and the electronic apparatus according to the invention will be described with reference to FIGS. 1 to 7. In the following drawings, the scales are different for each layer and each member so that each layer and each member can be recognized on the drawing. In the present embodiment, as an example of an electro-optical device, a TFT (Thin Film Transistor) active matrix driving type liquid crystal device with a built-in driving circuit is taken as an example.

  First, the overall configuration of the liquid crystal device according to the present embodiment will be described with reference to FIGS. 1 and 2. Here, FIG. 1 is a plan view of the TFT array substrate viewed from the side of the counter substrate together with the components formed thereon, and FIG. 2 is a cross-sectional view taken along the line HH ′ of FIG.

  1 and 2, in the liquid crystal device according to the present embodiment, a TFT array substrate 10 and a counter substrate 20 are arranged to face each other. The TFT array substrate 10 is made of a transparent substrate such as a quartz substrate, a glass substrate, or a silicon substrate, and the counter substrate 20 is made of a transparent substrate such as a quartz substrate or a glass substrate, for example. A liquid crystal layer 50 is sealed between the TFT array substrate 10 and the counter substrate 20, and the TFT array substrate 10 and the counter substrate 20 are around the image display region 10 a as an example of the “display region” according to the present invention. They are bonded to each other by a sealing material 52 provided in a sealing region located in the area.

  The sealing material 52 is made of, for example, an ultraviolet curable resin, a thermosetting resin, or an ultraviolet / heat combination type curable resin for bonding the two substrates, and is applied to the TFT array substrate 10 in the manufacturing process, and then irradiated with ultraviolet rays. And cured by heating or the like. In the sealing material 52, a gap material such as glass fiber or glass beads for dispersing the distance (ie, gap) between the TFT array substrate 10 and the counter substrate 20 to a predetermined value is dispersed. Note that the gap material may be arranged in the image display region 10a or a peripheral region located around the image display region 10a in addition to or instead of the material mixed in the seal material 52.

  In FIG. 1, a light-shielding frame light-shielding film 53 that defines the image display region 10 a is provided on the counter substrate 20 side in parallel with the inside of the seal region where the sealing material 52 is disposed. However, part or all of the frame light shielding film 53 may be provided as a built-in light shielding film on the TFT array substrate 10 side.

  A data line driving circuit 101 and an external circuit connection terminal 102 are provided along one side of the TFT array substrate 10 in a region located outside the sealing region in which the sealing material 52 is disposed in the peripheral region. The sampling circuit 7 is provided so as to be covered with the frame light shielding film 53 on the inner side of the seal region along the one side. The scanning line driving circuit 104 is provided so as to be covered with the frame light shielding film 53 in the frame area inside the seal area 52a along two sides adjacent to the one side.

  On the TFT array substrate 10, vertical conduction terminals 106 for connecting the two substrates with the vertical conduction material 107 are arranged in regions facing the four corner portions of the counter substrate 20. Thus, electrical conduction can be established between the TFT array substrate 10 and the counter substrate 20. Further, a lead wiring 90 for electrically connecting the external circuit connection terminal 102 to the data line driving circuit 101, the scanning line driving circuit 104, the vertical conduction terminal 106, and the like is formed.

  In FIG. 2, on the TFT array substrate 10, a laminated structure in which pixel switching TFTs as drive elements, wiring lines such as scanning lines and data lines are formed is formed. Although the detailed structure of this laminated structure is not shown in FIG. 2, pixel electrodes 9a made of a transparent material such as ITO (Indium Tin Oxide) are provided on the laminated structure in a predetermined pattern for each pixel. It is formed in an island shape.

  The pixel electrode 9a is formed in the image display region 10a on the TFT array substrate 10 so as to face a counter electrode 21 described later. On the surface of the TFT array substrate 10 facing the liquid crystal layer 50, that is, on the pixel electrode 9a, an alignment film 16 is formed so as to cover the pixel electrode 9a.

  A light shielding film 23 is formed on the surface of the counter substrate 20 facing the TFT array substrate 10. For example, the light shielding film 23 is formed in a lattice shape when viewed in plan on the facing surface of the facing substrate 20. In the counter substrate 20, a non-opening area is defined by the light shielding film 23, and an area partitioned by the light shielding film 23 is an opening area that transmits light emitted from, for example, a projector lamp or a direct viewing backlight. The light shielding film 23 may be formed in a stripe shape, and the non-opening region may be defined by the light shielding film 23 and various components such as data lines provided on the TFT array substrate 10 side.

  On the light shielding film 23, a counter electrode 21 made of a transparent material such as ITO is formed so as to face the plurality of pixel electrodes 9a. In order to perform color display in the image display region 10a on the light shielding film 23, a color filter (not shown in FIG. 2) may be formed in a region including a part of the opening region and the non-opening region. An alignment film 22 is formed on the counter electrode 21 on the counter surface of the counter substrate 20.

  In addition to the data line driving circuit 101, the scanning line driving circuit 104, the sampling circuit 7, etc., a plurality of data lines are pre-set at a predetermined voltage level on the TFT array substrate 10 shown in FIGS. A precharge circuit that supplies a charge signal prior to an image signal, an inspection circuit for inspecting the quality, defects, and the like of the liquid crystal device during manufacture or at the time of shipment may be formed.

  Next, the electrical configuration of the liquid crystal device according to the present embodiment will be described with reference to FIGS. FIG. 3 is a block diagram schematically showing the electrical configuration of the liquid crystal device according to the present embodiment, and FIG. 4 is a configuration of the sampling circuit shown in FIG. 3 and various signal lines provided around it. It is a block diagram which expands and shows.

  In FIG. 3, a plurality of scanning lines 11a and a plurality of data lines 6a intersect with each other in the image display region 10a on the TFT array substrate 10, and pixel portions 9 corresponding to the pixels correspond to these intersections. It is provided in a matrix. The pixel portion 9 is electrically connected to each of the scanning line 11a and the data line 6a. The pixel unit 9 basically applies a pixel switching TFT for selectively applying an image signal supplied from the data line 6a and the input image signal to the liquid crystal layer 50 (see FIG. 2). It includes a pixel electrode 9a (see FIG. 2) for holding, that is, a liquid crystal holding capacitor together with the counter electrode 21 (see FIG. 2). The pixel unit 9 may be provided with a storage capacitor added in parallel with the liquid crystal storage capacitor in order to prevent the image signal stored in the liquid crystal storage capacitor from leaking.

  In FIG. 3, a data line driving circuit 101, a sampling circuit 7, and a scanning line driving circuit 104 are provided in the peripheral region on the TFT array substrate 10.

  The scanning line driving circuit 104 is supplied with a Y clock signal CLY (and its inverted Y clock signal CLYinv) and a Y start pulse from an external circuit (not shown) via an external circuit connection terminal 102 (see FIG. 1). DY is supplied. When the Y start pulse DY is input, the scanning line driving circuit 104 sequentially generates a scanning signal at a timing based on the Y clock signal CLY and the inverted Y clock signal CLYinv and outputs the scanning signal to the scanning line 11a.

  The data line driving circuit 101 is supplied with an X clock signal CLX (and an inverted X clock signal CLXinv which is an inverted signal thereof) and an X start pulse DX from an external circuit via the external circuit connection terminal 102. Then, when the X start pulse DX is input, the data line driving circuit 101 sequentially generates the sampling signals S1,..., Sn at the timing based on the X clock signal CLX and the inverted X clock signal CLXinv to generate the sampling signal line 114. Output to.

  The sampling circuit 7 includes switching elements (that is, sampling switches) provided for each data line 6a in order to select the data line 6a to which the image signal is supplied from the image signal line 6, and the switching operation is performed by the data line 6a. Timing control is performed by sampling signals S1,..., Sn from the drive circuit 101.

  The sampling circuit 7 is supplied with image signals VID1 to VID6, which are serial-parallel converted into six phases by an external circuit, that is, phase-expanded, via six image signal lines 6. Each of the six image signal lines 6 is routed around the data line driving circuit 101 from the external circuit connection terminal 102 and wired along the arrangement direction of the data lines 6a (that is, the X direction). Yes.

  Note that the number of phase development of the image signal (that is, the number of series of image signals to be developed in serial-parallel) is not limited to 6 phases, for example, 9 phase, 12 phase, 24 phase, 48 phase, 96 phase. ... etc.

  As shown in FIG. 4, the switching element of the sampling circuit 7 is specifically configured as a sampling TFT 71. For convenience of explanation, FIG. 4 representatively shows only the sampling TFT 71 corresponding to the data line 6 a belonging to the i-th data line group among the plurality of sampling TFTs 71 included in the sampling circuit 7. Hereinafter, the sampling TFT 71 corresponding to the data line 6a belonging to the i-th data line group will be described, but the other data line groups are similarly configured.

  In FIG. 4, for the sake of convenience, each switching element of the sampling circuit 7 is shown as a single-channel TFT. However, the sampling TFT 71 may be a dual-channel TFT.

  The source wiring 71S of each sampling TFT 71 (that is, each of the six sampling TFTs 71 corresponding to the six data lines 6a belonging to the i-th data line group) is connected to one of the six image signal lines. Electrically connected.

  The drain wiring 71D of each sampling TFT 71 is electrically connected to a corresponding one of the six data lines 6a belonging to the i-th data line group.

  The gate wiring 71G including the gate electrode of each sampling TFT 71 is electrically connected to the sampling signal line 114 and supplied with the i-th sampling signal Si output from the data line driving circuit 101 (see FIG. 3). Is done. Here, the “gate wiring 71G” according to the present embodiment is an example of the “relay wiring” according to the present invention.

  With this configuration, each sampling TFT 71 supplies image signals VID1 to VID6 for each data line group (or block) including six data lines 6a as a group in accordance with the sampling signal Si. To do. Accordingly, since the plurality of data lines 6a are driven for each data line group, the driving frequency can be suppressed.

  Various timing signals such as the clock signals CLX and CLY are generated by, for example, a timing generator formed in an external circuit (not shown) and supplied to each circuit on the TFT array substrate 10 via the external circuit connection terminal 102. . Further, the power necessary for driving each drive circuit is also supplied from an external circuit, for example.

  In FIG. 3 again, in the peripheral region on the TFT array substrate 10, a counter electrode potential line 605 for supplying a counter electrode potential LCC as an example of the “common potential” according to the present invention from an external circuit is connected to the external circuit connection terminal. Wired from 102 to the vertical conduction terminal 106. The counter electrode potential line 605 is electrically connected to the counter electrode potential branch wiring 606 as an example of the “shield wiring” according to the present invention, which is wired along the arrangement direction of the data lines 6a (that is, the X direction). Has been.

  Thus, the counter electrode potential LCC is supplied to the counter electrode 21 via the vertical conduction terminal 106 and the vertical conduction material 107 (see FIG. 1). The counter electrode potential LCC is a reference potential of the counter electrode 21 for appropriately holding the potential difference from the pixel electrode 9a and forming a liquid crystal storage capacitor. In the present embodiment, the 1H inversion driving method is employed, and the image signals VID1 to VID6 are inverted in polarity with a positive polarity on the higher side and a negative polarity on the lower side with respect to the counter electrode potential LCC in a predetermined cycle. The More specifically, the image signals VID <b> 1 to VID <b> 6 are supplied to the pixel portions 9 arranged in the odd rows at a positive potential with respect to the counter electrode potential LCC during display corresponding to one frame. At the same time, the pixels 9 arranged in even rows are supplied with a negative potential with respect to the counter electrode potential LCC, and while the display corresponding to the next frame is performed, the even number is reversed. The polarity of the potential is inverted so that the pixel portions 9 arranged in rows are supplied with a positive potential and the pixel portions 9 arranged in odd rows are supplied with a negative potential. That is, the image signals VID <b> 1 to VID <b> 6 are supplied to the pixel portions 9 in the same row with the same polarity potential and are supplied to the pixel portions 9 in adjacent rows with different polarity potentials. The polarity of the potential is inverted so that the polarity is inverted every frame at the frame period.

  Next, the positional relationship among the image signal line 6, the sampling signal line 114, and the counter electrode potential branch line 606 will be specifically described with reference to FIGS. FIG. 5 is a plan view of the image signal line, the sampling signal line, and the counter electrode potential branch line as viewed from the counter substrate side, and FIG. 6 is a cross-sectional view taken along line AA ′ of FIG. In FIG. 6, illustration of components on the upper layer side from an interlayer insulating film 43 described later and components on the lower layer side from the layer in which the gate wiring 71G is provided is omitted.

  As shown in FIG. 5, the counter electrode potential branch wiring 606 is disposed so as to cover the plurality of image signal lines 6 and the plurality of sampling signal lines 114 in plan view. In other words, a plurality of image signal lines 6 and a plurality of sampling signal lines 114 are arranged in the counter electrode potential branch wiring 606.

  As shown in FIG. 6, the layer provided with the counter electrode potential branch wiring 606 is disposed between the layer provided with the image signal line 6 and the layer provided with the sampling signal line 114. Here, the image signal line 6 has, for example, a three-layer structure of a layer made of aluminum, a layer made of titanium nitride, and a layer made of plasma nitride film in order from the lower layer. The sampling signal line 114 has, for example, a two-layer structure in which a lower layer includes aluminum and an upper layer includes titanium nitride. The counter electrode potential branch wiring 606 includes aluminum, for example.

  The “layer provided with the image signal line 6” and the “layer provided with the sampling signal line 114” according to the present embodiment are the “first layer” and “second layer” according to the present invention, respectively. It is an example.

  The interlayer insulating film 42 is provided between the layer where the image signal line 6 is provided and the layer where the counter electrode potential branch wiring 606 is provided, and the layer where the counter electrode potential branch wiring 606 is provided and the sampling signal line 114. An interlayer insulating film 43 is provided between the provided layers, and an interlayer insulating film 44 is provided above the layer where the sampling signal line 114 is provided to prevent short-circuiting between the elements. . Further, in these various insulating films 42, 43 and 44, contact holes and the like for electrically connecting wirings and the like included in each layer are formed.

  A gate wiring 71G that electrically connects the image signal line 6 and the sampling TFT 71 of the sampling circuit 7 is disposed below the layer where the image signal line 6 is provided. Between the layer in which the image signal line 6 is provided and the layer in which the gate wiring 71G is provided, an interlayer insulating film 41 in which contact holes 711 and 712 are formed is provided. The image signal line 6 and the gate wiring 71G are electrically connected through a contact hole 711, and the sampling TFT 71 and the gate wiring 71G are electrically connected through a contact hole 712.

  Thereby, capacitive coupling between the image signal line 6 and the sampling signal line 114 can be prevented. In addition, capacitive coupling between the adjacent image signal lines 6 and between the adjacent sampling signal lines 114 can be suppressed. Furthermore, since the potential of the counter electrode potential branch wiring 606 is the counter electrode potential LCC, a high shielding effect can be realized. Therefore, the influence of noise can be suppressed, and high-quality image display is possible.

<Electronic equipment>
Next, a case where the above-described liquid crystal device is applied to a projector which is an example of an electronic device will be described with reference to FIG. The liquid crystal panel 100 in the above-described liquid crystal device is used as a light valve of a projector. FIG. 7 is a plan view showing a configuration example of the projector.

  As shown in FIG. 7, a projector 1100 includes a lamp unit 1102 made of a white light source such as a halogen lamp. The projection light emitted from the lamp unit 1102 is separated into three primary colors of RGB by four mirrors 1106 and two dichroic mirrors 1108 arranged in the light guide 1104, and serves as a light valve corresponding to each primary color. The light enters the liquid crystal panels 1110R, 1110B, and 1110G.

  The configurations of the liquid crystal panels 1110R, 1110B, and 1110G have the same configuration as that of the above-described liquid crystal device, and are driven by R, G, and B primary color signals supplied from the image signal processing circuit, respectively. The light modulated by these liquid crystal panels enters the dichroic prism 1112 from three directions. In this dichroic prism 1112, R and B light is refracted at 90 degrees, while G light travels straight. Accordingly, as a result of the synthesis of the images of the respective colors, a color image is projected onto the screen or the like via the projection lens 1114.

  Here, paying attention to the display images by the liquid crystal panels 1110R, 1110B, and 1110G, the display images by the liquid crystal panels 1110R and 1110B need to be horizontally reversed with respect to the display images by the liquid crystal panel 1110G.

  Since light corresponding to the primary colors R, G, and B is incident on the liquid crystal panels 1110R, 1110B, and 1110G by the dichroic mirror 1108, it is not necessary to provide a color filter.

  In addition to the electronic device described with reference to FIG. 7, a mobile personal computer, a mobile phone, a liquid crystal television, a viewfinder type or a monitor direct view type video tape recorder, a car navigation device, a pager, and an electronic notebook , Calculators, word processors, workstations, videophones, POS terminals, devices with touch panels, and the like. Needless to say, the present invention can be applied to these various electronic devices.

  In addition to the liquid crystal device described in the above embodiment, the present invention also includes a reflective liquid crystal device (LCOS) in which elements are formed on a silicon substrate, a plasma display (PDP), a field emission display (FED, SED), The present invention can also be applied to an organic EL display, a digital micromirror device (DMD), an electrophoresis apparatus, and the like.

  The present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit or idea of the invention that can be read from the claims and the entire specification. An optical device and an electronic apparatus including the electro-optical device are also included in the technical scope of the present invention.

It is a top view which shows the whole structure of the liquid crystal device which concerns on embodiment of this invention. It is the HH 'sectional view taken on the line of FIG. 1 is a block diagram schematically showing an electrical configuration of a liquid crystal device according to an embodiment of the present invention. FIG. 4 is an enlarged block diagram showing the configuration of the sampling circuit shown in FIG. 3 and various signal lines provided in the periphery thereof. It is the top view which looked at the image signal line, sampling signal line, and counter electrode potential branch line in the liquid crystal device concerning the embodiment of the present invention from the counter substrate side. FIG. 6 is a cross-sectional view taken along line AA ′ in FIG. 5. It is a top view which shows the structure of the projector which is an example of the electronic device to which the electro-optical apparatus is applied.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 6 ... Image signal line, 6a ... Scanning line, 7 ... Sampling circuit, 10 ... TFT array substrate, 10a ... Image display area, 11a ... Data line, 20 ... Opposite substrate, 100 ... Liquid crystal panel, 101 ... Data line drive circuit, 104 ... Scanning line drive circuit, 114 ... Sampling signal line, 606 ... Counter electrode potential branch wiring

Claims (4)

A first substrate;
A second substrate disposed opposite the first substrate;
With
The first substrate is
A plurality of scan lines and a plurality of data lines intersecting each other;
A plurality of pixel electrodes provided to correspond to intersections of the plurality of scanning lines and the plurality of data lines;
A plurality of image signal lines to which image signals are supplied;
A sampling circuit that samples the image signals supplied to the plurality of image signal lines and supplies the plurality of data signal lines to the plurality of data lines,
A plurality of sampling signal lines for supplying the sampling signal to the sampling circuit;
A shield layer disposed in a layer between the plurality of image signal lines and the plurality of sampling signal lines;
A first interlayer insulating layer disposed between the sampling signal line and the shield layer;
A second interlayer insulating layer disposed between the image signal line and the shield layer;
With
The second substrate is
A counter electrode that is arranged to face the plurality of pixel electrodes and to which a common potential is applied;
The image signal is inverted in polarity with respect to the common potential,
Wherein the shield layer, an electro-optical device, characterized in that said common potential is supplied. A plurality of sampling lines provided corresponding to the plurality of data lines, electrically connecting the plurality of sampling signal lines and the sampling circuit, and disposed on a layer opposite to the shield layer of the plurality of image signal lines. With relay wiring,
The plurality of relay lines extend so as to intersect with the plurality of image signal lines,
The sampling signal line is extended so as to intersect the plurality of image signal lines,
The electro-optical device according to claim 1, wherein the shield layer covers the plurality of image signal lines and extends so as to intersect the plurality of relay wirings and the plurality of sampling signal lines. . The first substrate is
A counter electrode potential line electrically connected to the counter electrode;
The electro-optical device according to claim 1, wherein the shield layer is a wiring layer branched from the counter electrode potential line. An electronic apparatus comprising the electro-optical device according to any one of claims 1 to 3.

Images