JP2006184384A - Electrooptical device and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simultaneously achieve reduction of unevenness of luminance, enhancement of an aperture ratio, and reduction of flickers in an electrooptical device such as an organic EL device. <P>SOLUTION: A pixel circuit 70G has hold capacitances 10 and 20 and, with these two capacitances, can hold a charge corresponding to a data signal in these hold capacitances. The charge held by the hold capacitances 10 and 20 makes it possible to apply a voltage corresponding to the charge held by the hold capacitances 10 and 20 to a gate of an electric current control TFT 83 even during the period when a scanning signal is not provided to the pixel circuit 70G in one vertical scanning period. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technical field of, for example, an electro-optical device such as an organic EL device capable of color display and an electronic apparatus including the same.

  As an image display device replacing a liquid crystal display device, an organic EL device provided with an organic EL element has attracted attention. The organic EL element is a current-driven self-luminous element that emits light, unlike a liquid crystal element that changes the amount of light transmitted.

  In an active matrix driving electro-optical device using an organic EL element, a pixel circuit for adjusting a light emission gradation of the organic EL element is provided in each pixel. The setting of the light emission gradation in the pixel circuit is performed by supplying a voltage or current corresponding to the light emission gradation to the pixel circuit and adjusting the drive current flowing through the organic EL element. Here, a pixel is a unit area constituting an image display area, and includes one organic EL element in the area, or a plurality of organic EL elements that emit light such as red, green, and blue The meanings of both are included. In this specification, the image display area means the entire range of the image display surface including a plurality of pixel areas, and the pixel circuit is a circuit including an organic EL element and a semiconductor element included in each pixel. Means a unit circuit included in each pixel.

  Since driving current needs to flow to drive the organic EL element, a voltage drop occurs in the power supply line from the power supply circuit to the pixel circuit. In order to reduce the voltage drop due to such power line routing, for example, a power line as shown in Patent Document 1 has been proposed. According to Patent Document 1, current is supplied to the pixel circuit from above and below by wiring arranged inside the pixel region.

  In addition, an organic EL device driven by an active matrix includes a thin film transistor that controls a drive current that normally flows through the organic EL element. Such a thin film transistor is switched on and off by a voltage applied from a storage capacitor of the pixel circuit.

JP 2002-108252 A

  In this type of electro-optical device, it is important to improve the image quality to increase the aperture ratio in each pixel region in addition to the above-described reduction in voltage drop and securing of the storage capacitor. However, ensuring the aperture ratio by making the power supply line as thin as possible, preventing luminance unevenness in the image display area due to the voltage drop of the power supply line, and a sufficient storage capacity to hold the potential in one vertical scanning period It is difficult to solve the three issues of securing at the same time. To deal with such problems, for example, it is conceivable that power lines are arranged in a grid pattern in the image display area, or power lines are wired only in the vertical direction, and a storage capacitor is formed under the power lines. Again, it is difficult to solve the above three problems at the same time. More specifically, when the power supply line is thinned to increase the aperture ratio, the voltage drop in the power supply line increases. In addition, when the size of the pixel region is reduced in order to obtain high resolution, it is difficult to create a sufficient storage capacitor for each pixel circuit, and a problem such as flicker occurs. In this specification, “aperture ratio of each pixel” or simply “aperture ratio” is a ratio of “aperture area” that is an area where light is substantially emitted out of the entire area for each pixel. Means. That is, in each pixel, an opening region of the “pixel region” that is the entire region of each pixel, including an opening region where light emitted from the organic EL element is not blocked by wiring or the like and other non-opening regions. Means the proportion of

  The present invention has been made in view of the above-described problems. For example, an electro-optical device such as an organic EL device whose display performance is improved by reducing a voltage drop in a power supply line, securing a storage capacitor, and securing an aperture ratio. An object is to provide an apparatus and an electronic apparatus including the same.

  In order to solve the above problems, the electro-optical device according to the present invention supports a plurality of data lines and a plurality of scanning lines intersecting each other on the substrate, and the intersection of the plurality of data lines and the plurality of scanning lines. A plurality of light emitting elements that emit light of different colors, and are provided so as to extend along the data line, and the light emitting elements have different power sources according to the colors. And a plurality of main power supply lines that are provided on the lower layer side of the main power supply line through an interlayer insulating film so as to extend along the scanning line, and each of the light emitting elements according to the color. A plurality of sub power supply lines for supplying different power supplies, and the same power supply line as the sub power supply lines are provided for each of the light emitting elements below the main power supply line via the interlayer insulating film, In the extending direction in which the main power line extends, the sub power line A first capacitor electrode electrically insulated and electrically connected to the main power supply line through a first conductive portion penetrating the interlayer insulating film; and the main power supply line and the sub-electrode for each light emitting element. Provided via a dielectric film on the lower layer side of the sub power line so as to extend along each of the power lines, and charge corresponding to a data signal supplied from the data line is supplied to the sub power line And a second capacitor electrode constituting a first storage capacitor and a second storage capacitor for holding between each of the first capacitor electrodes.

  According to the electro-optical device according to the present invention, the current-driven light-emitting element is, for example, an organic EL element or the like. For example, a plurality of light-emitting elements that emit light having wavelengths corresponding to red, green, and blue The scanning lines and the plurality of data lines are respectively disposed in pixel areas provided corresponding to the intersecting areas. Accordingly, during the operation, an image signal and a scanning signal are supplied via the data line and the scanning line, and these elements are caused to emit light at a required timing, whereby an image can be displayed in color.

  Here, the plurality of main power supply lines and the plurality of sub power supply lines are provided so as to extend along the plurality of scanning lines and the plurality of data lines arranged to cross each other on the substrate. The voltage drop in these power supply lines can be reduced. More specifically, for example, compared to the case where the power supply line is provided only along one of the vertical direction and the horizontal direction in the image display region of the organic EL device, the power supply line along each of the vertical direction and the horizontal direction. By providing this, the electric resistance of the entire power supply line can be reduced, and the voltage drop in the power supply line can be reduced. Accordingly, each size of the power supply line, more specifically, for example, the width can be reduced, and the aperture ratio in the pixel region can be increased.

  The plurality of main power supply lines and the plurality of sub power supply lines individually supply power in accordance with, for example, organic EL elements that generate red, green, and blue light. For example, the power supplied to the organic EL element that emits green light is not supplied to the organic EL element that emits red light, and appropriate power corresponding to the organic EL element that emits each color is supplied. The More specifically, for example, regarding current-driven self-luminous elements such as organic EL elements, there are appropriate driving currents and voltages depending on the wavelength and luminance of light to be emitted, and these drive currents and voltages deviate from these. When a current or the like is supplied to the light emitting element, the luminance and the wavelength of light deviate from the target values. However, according to the electro-optical device according to the invention, an appropriate power source corresponding to each color is supplied to the organic EL element. By supplying, each organic EL element can be driven so as to emit light having a required wavelength and luminance.

  According to the electro-optical device of the invention, the first storage capacitor and the second storage capacitor can be configured between the plurality of sub power supply lines and the plurality of first capacitor electrodes, and the second capacitor electrode. The first and second holding capacitors can secure a holding capacitor sufficient to reduce, for example, flicker. The “first storage capacitor” according to the present invention is configured by using each of the sub power line and the second capacitor electrode as a capacitor electrode, and “second storage capacitor” is each of the first capacitor electrode and the second capacitor electrode. Are provided as capacitive electrodes. Since the first capacitor electrode is electrically insulated from the sub power supply line and is electrically connected to the main power supply line, it is possible to supply power by color by the sub power supply line, and along the main power supply line. Thus, the second storage capacitor can be provided for each pixel circuit. In addition, it is possible to provide a first storage capacitor for each pixel circuit along the sub power supply line by the sub power supply line, the second capacitor electrode, and the dielectric film, for example. That is, the first storage capacitor and the second storage capacitor can be provided for each pixel circuit along each of the main power supply line and the sub power supply line, and sufficient capacitance can be secured by the first and second storage capacitors. , Flicker and other problems can be reduced. The “second capacitor electrode” according to the present invention is a semiconductor film constituting a semiconductor element included in a pixel circuit, for example, and the “dielectric film” is an insulating film formed on the upper side of the semiconductor layer. means. Since such an insulating film usually has a very thin film thickness, it can function as a dielectric layer constituting the first storage capacitor and the second storage capacitor. Since the main power supply line and the sub power supply line are provided so as to cross each other, an interlayer insulating film is interposed between these power supply lines so as to insulate these power supply lines from each other. Therefore, for example, by electrically connecting the main power supply line and the first capacitor electrode via the first conductive portion such as the contact portion formed in the contact hole, the charge corresponding to the data signal is transferred to the second storage capacitor. Can hold.

  As described above, according to the electro-optical device according to the invention, it is possible to reduce the voltage drop in the power supply line and to increase the aperture ratio. In addition, according to the electro-optical device according to the present invention, since a sufficient storage capacity can be secured for each light emitting element, it is possible to reduce problems such as flicker and provide an electro-optical device with excellent display performance. It is.

  In one aspect of the electro-optical device according to the present invention, the sub power supply line may be formed of the same layer as the scanning line.

  According to this aspect, for example, the conductive film constituting the scanning line and the sub power supply line can be collectively formed on the substrate, and the manufacturing process is simpler than the case where the scanning line and the sub power supply line are formed in separate steps. Thus, an electro-optical device can be manufactured.

  In another aspect of the electro-optical device according to the present invention, the second capacitor electrode is formed of the same layer as a semiconductor film that forms a thin film transistor that controls light emission of the light-emitting element, and the dielectric film includes: The gate insulating film of the thin film transistor may be composed of the same layer.

  According to this aspect, the second capacitor electrode and the dielectric layer can be configured using the element structure of the thin film transistor provided for each light emitting element on the substrate, and the second structure can be provided without providing a new structure in the electro-optical device. A storage capacity can be configured.

  In another aspect of the electro-optical device according to the present invention, the first capacitor electrode is provided in a predetermined region on the dielectric film so as to extend along the main power supply line. The one conductive portion may be composed of a plurality of auxiliary conductive portions that penetrate the interlayer insulating film so as to electrically connect the main power supply line and the first capacitor electrode.

  According to this aspect, the second storage capacitor can be configured as a storage capacitor having a required capacity, and the electrical resistance of the main power supply line can be reduced. More specifically, since the main power supply line is electrically connected to the first capacitor electrode by a plurality of auxiliary conductive portions, the electric resistance of the main power supply line can be reduced by the amount of the first capacitor electrode. That is, the electrical resistance to the power supplied through the main power supply line is reduced by the amount of power supply path newly added by the first capacitor electrode, and the voltage drop in the main power supply line can be reduced accordingly. Here, the auxiliary conductive portion is, for example, a plurality of contact portions penetrating the interlayer insulating film, and these contact portions are provided along the main power supply line. According to this aspect, the voltage drop in the main power supply line can be reduced, and the display performance of the electro-optical device can be improved.

  In another aspect of the electro-optical device according to the present invention, one main power line and one sub power line for supplying power to light emitting elements that emit light of the same color among the main power line and the sub power line. The one power supply line and the one sub power supply line may be electrically connected via a second conductive portion penetrating the interlayer insulating film in a region where the crossing each other.

  According to this aspect, power can be supplied from one main power supply and one sub power supply line to the light emitting elements that emit light in colors corresponding to these power supply lines, and power can be effectively supplied to the light emitting elements. More specifically, for example, when light emitting elements that emit red (R), green (G), and blue (B) are arranged in the image display region in a so-called stripe arrangement, the red light emitting elements are supplied with power. These two power supply lines are electrically connected in a region where a main power supply line for supplying power and a sub power supply line for supplying power to the red light emitting element intersect, and each supplies power to the red light emitting element. Similarly, a main power supply line and a sub power supply line that supply power to a light emitting element that emits green or blue light are electrically connected to each other in a region where they intersect each other. That is, in the image display region, the main power supply and the sub power supply line that supply power to the light emitting elements that emit light of different colors are insulated through the interlayer insulating film so as not to be electrically connected to each other. On the other hand, the main power supply line and the sub power supply line that supply power to the light emitting elements that emit light of the same color are electrically connected to each other via a contact portion that is an example of a second conductive portion that penetrates the interlayer insulating film. Therefore, when the power supply lines of the same color are viewed, the redundancy increases, so that the reliability as the wiring increases, and the resistance can be reduced by the redundant structure.

  In another aspect of the electro-optical device according to the invention, the light emitting element may be an organic EL element.

  According to this aspect, the light emission characteristics of the organic EL element can be sufficiently exhibited, and thereby the display performance of the electro-optical device can be improved.

  In order to solve the above problems, an electronic apparatus according to the present invention includes the above-described electro-optical device of the present invention.

  According to the electronic apparatus according to the present invention, since the electro-optical device according to the present invention described above is provided, a projection display device, a mobile phone, an electronic notebook, a word processor, and a viewfinder type capable of high-quality display. Alternatively, various electronic devices such as a monitor direct-view video tape recorder, a workstation, a videophone, a POS terminal, and a touch panel can be realized. Furthermore, according to the electronic apparatus of the present invention, an image forming apparatus such as a printer having a printer head can be realized. In addition, as an electronic apparatus according to the present invention, for example, an electrophoretic device such as electronic paper can be realized.

  Such an operation and other advantages of the present invention will become apparent from the embodiments described below.

  Hereinafter, embodiments of an electro-optical device and an electronic apparatus including the same according to the present invention will be described with reference to the drawings.

  First, an electrical connection configuration of an organic EL device 1 which is an embodiment of an “electro-optical device” according to the invention will be described with reference to FIG. FIG. 1 is a block diagram showing an electrical connection configuration of the organic EL device 1. In the following, the horizontal direction in FIG. 1 is the X direction, and the vertical direction is the Y direction.

  In FIG. 1, the organic EL device 1 includes a power supply system 9, an organic EL panel 100, a drive circuit 120, an image signal processing circuit 300, a timing generator 400, and a power supply circuit 500.

  The organic EL panel 100 is arranged in a matrix in the image display area 110 occupying the center of the element substrate in accordance with the positions where the data lines 114 and the scanning lines 112 wired vertically and horizontally and the data lines 114 and the scanning lines 112 intersect. And a plurality of pixel circuits 70 provided in a shape. Each of the pixel circuits 70 includes an organic EL element, and is divided into three types of pixel circuits 70R, 70G, and 70B according to the emission color of the organic EL element. More specifically, the pixel circuit 70 includes a pixel circuit 70R including an organic EL element that emits red (R) light when driven, a pixel circuit 70G including an organic EL element that emits green light (G), and a blue (B The pixel circuit 70B is provided with an organic EL element that emits light. The pixel circuit 70 is arranged in the order of the pixel circuit 70R, the pixel circuit 70G, the pixel circuit 70B,..., The pixel circuit 70R, the pixel circuit 70G, and the pixel circuit 70B from the left side along the X direction in the drawing. The same kind of pixel circuits 70 are arranged in the same column along the middle Y direction. That is, a so-called stripe arrangement is adopted here. As will be described later, the pixel circuit 70 includes thin film transistors such as a write control TFT 81, a holding TFT 82, a current control TFT 83, and a light emission control TFT 84, and the data line 114 and the scanning line 112 are electrically connected to a predetermined thin film transistor. ing.

  The organic EL device 1 can display a color image with various signals and power supplied from the data line 114, the scanning line 112, and the power supply system 9. In the present embodiment, each of the pixel circuits 70R, 70G, and 70B constitutes an individual pixel unit. However, it is also possible to configure one pixel unit by combining these pixel circuits 70R, 70G, and 70B. It is. In this embodiment, a grid-like arrangement is given as an example of the arrangement of the pixel circuits 70. However, the electro-optical device according to the present invention is limited to the arrangement of the pixel circuits 70 according to this embodiment, that is, the stripe arrangement. For example, the pixel circuits 70R, 70G, and 70B may be arranged in a so-called delta arrangement or triangle arrangement. In other words, the electro-optical device according to the present invention can be applied to any electro-optical device as long as the pixel circuit is disposed corresponding to the intersection of the power supply lines that supply power to the pixel circuit 70.

  The power supply circuit 500 generates three types of power supplies corresponding to organic EL elements that emit light of three colors, and supplies these power supplies to the outer power supply line 11 disposed around the image display region 110. The outer power supply line 11 includes three types of outer power supply lines 11R, 11G, and 11B according to the type of power supplied from the power supply circuit 500.

  The power supply system 9 includes an outer power supply line 11 composed of three types of outer power supply lines 11R, 11G, and 11B, and three types of Y power supply lines 13R, 13G, and 13B that are examples of the “main power supply line” according to the present invention. Y power line 13 constituted by X, and X power supply line 12 constituted by three types of X power supply lines 12R, 12G, and 12B, each of which is an example of the “sub power supply line” according to the present invention. Then, power corresponding to these colors is supplied to the pixel circuits 70R, 70G, and 70B including the organic EL elements that emit blue light.

  The X power supply line 12 and the Y power supply line 13 are arranged in a grid pattern so as to cross each other in the image display area 110. The Y power supply lines 13R, 13G, and 13B are sequentially arranged along the X direction in the drawing, and extend along the Y direction from the outer power supply lines 11R, 11G, and 11B that are electrically connected to the power supply circuit 500, respectively. It is a power supply line branched so as to extend. More specifically, the Y power supply lines 13R, 13G, and 13B extend in the image display area 110, and supply current to supply driving current from the power supply circuit 500 to the organic EL elements included in each pixel circuit 70. Part of the line. In the present embodiment, the pixel circuits 70R, 70G, and 70B are repeatedly arranged in the order of the pixel circuits 70R, 70G, and 70B along the X direction in the drawing, and the Y power supply lines 13R, 13G, and 13B are also arranged in the pixel circuits 70R, 70G. , 70B, the Y power lines 13R, 13G, and 13B are arranged in this order from the left side in the drawing.

  The Y power lines 13R, 13G, and 13B are electrically connected to the pixel circuits 70R, 70G, and 70B, and supply power corresponding to the pixel circuits 70R, 70G, and 70B. More specifically, the Y power line 13R supplies the pixel circuit 70R with power for the organic EL element that emits red light supplied via the outer power line 11R. Similarly, the Y power supply line 13G and the Y power supply line 13B also supply the power for the organic EL element that emits green or blue light to the pixel circuit 70G or the pixel circuit 70B. That is, the Y power line 13 is composed of a plurality of types of power lines that supply power corresponding to the color emitted by the organic EL element.

  The X power supply lines 12R, 12G, and 12B are power supply lines branched from a part of the outer power supply lines 11R, 11G, and 11B that extend along the Y direction, and extend along the X direction in the drawing. The X power supply lines 12R, 12G, and 12B are current supply lines that supply a drive current to the organic EL elements included in the pixel circuit 70, similarly to the Y power supply lines 13R, 13G, and 13B. The X power supply line 12R is supplied with power for causing the red organic EL element to emit light from the outer power supply line 11R. Similarly, power is supplied to the X power supply lines 12G and 12B from the outer power supply lines 11G and 11B for causing the green organic EL elements and the blue organic EL elements to emit light. That is, the X power supply line 12 includes a plurality of types of power supply lines that supply power corresponding to the color emitted by the organic EL element, similarly to the Y power supply line 13.

  One X power supply line 12R, 12G, 12B is provided in each row Li (i = 1, 2,..., N; n is a natural number) of the pixel circuit 70 arranged in a matrix. In the pixel circuit 70, power is supplied to the pixel circuit 70 corresponding to each of the X power supply lines 12R, 12G, and 12B. More specifically, the X power supply line 12R extending to the uppermost row L1 in the drawing is electrically connected to the pixel circuit 70R included in the row L1. Similarly, the X power supply line 12G extended to the next row L2 of the row L1 is electrically connected to the pixel circuit 70G included in the row L2, and extended to the next row L3 of the row L2. The X power supply line 12B is electrically connected to the pixel circuit 70B included in the row L3. The X power supply lines 12R, 12G, and 12B are extended one by one in the order of the X power supply lines 12R, 12G, and 12B to the respective lines from the line L4 next to the line L3 to the row Ln that is positioned at the lowermost side in the drawing. The Therefore, in the image display region 110, the X power supply lines 12R, 12G, and 12B are electrically connected to the pixel circuits 70R, 70G, and 70B corresponding to these power supply lines.

  According to the X power supply line 12 and the Y power supply line 13, it is possible to reduce a voltage drop generated in the power supply system 9 when power is supplied from the power supply circuit 500 to the pixel circuit 70. Of the power supply lines included in the power supply system 9, the X power supply line 12 and the Y power supply line 13 extending in the image display area 110 are arranged in a grid pattern in the image display area 110, so that only the Y power supply line 13 is provided. Compared to the case where power is supplied from the power source to the pixel circuit 70 or the case where power is supplied from only the X power source line 12 to the pixel circuit 70, the widths of the X power source line 12 and the Y power source line 13 are reduced. The overall electrical resistance can be reduced. Therefore, it is possible to reduce a voltage drop that occurs in the power supply system 9 when power is supplied to the pixel circuit 70, and it is possible to reduce luminance unevenness in the image display region 110 caused by the voltage drop in the power supply line. For example, the voltage difference between the power supplied to the pixel circuit 70R arranged near the end of the image display area 110 and the power supplied to the pixel circuit 70R arranged near the center of the image display area 110 can be reduced. The organic EL elements that should emit light with the same luminance can be reduced from emitting light with different luminance depending on the position of the pixel circuit 70 arranged in the image display region 110. In particular, when the organic EL device 1 has a large screen, luminance unevenness due to variations in voltage drop is effectively reduced. Thereby, luminance unevenness can be reduced in the entire image display area 110, and the image quality of the organic EL device 1 can be improved.

  The X power supply lines 12R, 12G, and 12B are connected to the pixel circuits 70R, 70G, and 70B corresponding to the X power supply lines 12R, 12G, and 12B among the pixel circuits 70 included in the respective rows L1, L2,. Since only the pixels are electrically connected, the power to be supplied to the pixel circuit 70 including the organic EL elements that emit light of the other color is supplied to the pixel circuit 70 including the organic EL elements that emit light of one color. There is nothing. More specifically, the X power supply line 12R and the Y power supply line 13R supply power only to the pixel circuit 70R. Similarly, power supplies corresponding to the pixel circuits 70G and 70B are supplied from the X power supply lines 12G and 12B and the Y power supply lines 13G and 13B, respectively. According to the X power supply line 12 and the Y power supply line 13, by setting various conditions such as the voltage or current of the power supply generated by the power supply circuit 500, different power supplies are supplied according to the emission colors of various organic EL elements. it can. Since the light emission efficiency of each organic EL element is different for each emission color, if the power supplied to each of the X power supply line 12 and the Y power supply line 13 is varied according to the light emission color of the organic EL element, The organic EL element can emit light. In addition, it is possible to reduce the deviation of light generated from each organic EL element from a predetermined wavelength. Further, in order to reduce or make uniform the voltage drop in each power supply line, the line widths of the X power supply line 12 and the Y power supply line 13 are set according to the emission color of the organic EL element that is the final supply destination of the power supply. It may be set.

  The driving circuit 120 includes a scanning line driving circuit 130 and a data line driving circuit 150.

  The scanning line driving circuit 130 supplies a scanning signal to each row of the pixel circuit 70 via the scanning line 112 arranged for each row of the pixel circuit 70 arranged in a matrix. As will be described later, the scanning line 112 includes a write control signal line for supplying a write signal to the pixel circuit 70 and a light emission control signal line for supplying a light emission control signal. The data line driving circuit 150 sequentially supplies a data signal to each data line 114. In this embodiment, since the drive circuit 120 is constructed on the element substrate of the organic EL device 1, the organic EL panel 100 is a panel with a built-in drive circuit. The drive circuit 120 is preferably formed in a peripheral region located around the image display region 110 on the element substrate together with a semiconductor element such as a thin film transistor related to each pixel circuit 70 formed in the image display region 110. However, such a drive circuit 120 may be at least partially configured as an external IC and may be retrofitted to the peripheral region.

  The timing generator 400 outputs various timing signals used in each part of the organic EL panel 100. A timing signal output means that is a part of the timing generator 400 generates a dot clock that is a minimum unit clock and scans each pixel circuit. Based on the dot clock, a Y clock signal YCK and an inverted Y clock signal are generated. YCKB, X clock signal XCK, inverted X clock signal XCKB, Y transfer start pulse DY, and X transfer start pulse DX are generated.

  When input image data D1 is input from the outside, the image signal processing circuit 300 generates an image signal D2 based on the input image data D1. The image signal D2 is latched or sampled by a latch circuit or the like included in the data line driving circuit 150, and is supplied from the data line 114 to each pixel circuit 70 of the organic EL panel 100 as data signals d1, d2,. .

  Next, a specific configuration of the pixel circuit 70 will be described with reference to FIGS. In the present embodiment, the connection form of the X power supply line 12 and the Y power supply line 13 in the pixel circuit 70 is a combination of the emission color of the organic EL element and the power supply type supplied from the X power supply line 12 and the Y power supply line 13. Depending on the connection type, there are two types of connection. Hereinafter, the configuration of the pixel circuit 70 will be described while sequentially showing each of the two connection forms.

  First, an example of a connection configuration of the X power supply line 12 and the Y power supply line 13 in the pixel circuit 70 will be described with reference to FIGS. FIG. 2 is a plan view showing a specific configuration of the pixel circuit 70G. More specifically, it is a plan view showing a specific configuration of a pixel circuit 70G formed in a region A in FIG. As shown in FIG. 1, in the region A, two pixel circuits 70G are formed side by side in the vertical direction in the drawing. 3 is a cross-sectional view taken along the line III-III ′ of FIG. 2, and FIG. 4 is a cross-sectional view taken along the line IV-IV ′ of FIG. FIG. 5 is a circuit diagram of the pixel circuit 70G shown in FIG.

  2, 3, and 4, the pixel circuit 70 </ b> G includes an organic EL element 72 </ b> G, holding capacitors 10 and 20, a write control TFT 81, a holding TFT 82, a current control TFT 83, and a light emission control TFT 84.

  2 and 3, an organic EL element 72G includes, for example, an anode that is a transparent electrode (not shown), a hole transport layer, a light emitting layer, and an electron transport layer on an element substrate 8 such as a glass substrate. It has a multilayer structure in which a layer and a cathode are stacked. 3 and 4, an acrylic layer 26 and a back electrode 27, not shown in FIG. 2, are formed. The acrylic layer 26 is a partition wall that partitions a plurality of organic EL elements formed on the element substrate 8 from each other. The back electrode 27 is electrically connected in common with the cathode side of each organic EL element, and functions as a cathode. On the upper side of the back electrode 27, a counter substrate such as a glass substrate for sealing the organic EL element is disposed.

  2, 3, and 4, the storage capacitor 10 is an example of the “first storage capacitor” according to the present invention, and the semiconductor layer 22 is an example of the “second capacitor electrode” according to the present invention. The gate insulating film 23, which is an example of the “dielectric film”, and a part of the X power supply line 12R.

  3 and 4, the semiconductor layer 22 is a polysilicon layer obtained by, for example, crystallizing an amorphous silicon film on the insulating film 21 formed on the element substrate 8. The semiconductor layer 22 is obtained by patterning an amorphous silicon film formed on the insulating film 21 into a predetermined shape and then crystallizing the amorphous silicon film. Since the polysilicon layer has higher carrier mobility than the amorphous silicon film, the semiconductor layer 22 sufficiently functions as a capacitor electrode constituting the storage capacitor 10.

  2, 3, and 4, the semiconductor layer 22 is the same as the semiconductor layer including the channel region of the write control TFT 81, the holding TFT 82, the current control TFT 83, and the light emission control TFT 84 that are formed on the same plane on the element substrate 8. It is formed as a single layer. More specifically, a portion of the semiconductor layer 22 formed on the insulating film 21 that extends along the X power supply line 12 </ b> R functions as one capacitor electrode constituting the storage capacitor 10. Therefore, it is not necessary to separately provide a new electrode as a capacitor electrode constituting the storage capacitor 10, and the storage capacitor 10 can be configured using an existing layer structure formed on the element substrate 8. A part of the semiconductor layer 22 extending to the lower layer side of the Y power supply line 13 </ b> G functions as one capacity electrode constituting the storage capacitor 20.

  2, 3, and 4, the gate insulating film 23 is formed to cover the semiconductor layer 22 as the same layer as the gate insulating film of the write control TFT 81, the holding TFT 82, the light emission control TFT 84, and the current control TFT 83. The gate insulating film 23 is formed at the same time when a gate insulating film such as the write control TFT 81 is formed. The gate insulating film 23 has an extremely thin film thickness and functions as a dielectric film for the storage capacitors 10 and 20.

  In FIG. 2, the X power supply line 12R extends in the pixel circuit 70G along the X direction. The X power supply line 12R is formed as the same layer as the gates of the write control TFT 81, the holding TFT 82, the light emission control TFT 84, and the current control TFT 83, and then patterned into a required shape. 3 and 4, the X power supply line 12 </ b> R is formed on the gate insulating film 23, and functions as one capacity electrode constituting the storage capacitor 10. The storage capacitor 10 includes an X power supply line 12 </ b> R extending above the gate insulating film 23 and a semiconductor layer 22 extending below the gate insulating film 23 as a pair of capacitor electrodes.

  2, 3, and 4, the storage capacitor 20 is an example of the “second storage capacitor” according to the present invention, and includes the semiconductor layer 22, the gate insulating film 23, and the “first capacitor electrode” according to the present invention. It is comprised from the electrically conductive film 29 which is an example.

  2 and 3, the conductive film 29 is in the same layer as the X power supply line 12R, and the same layer as the gates of the write control TFT 81, the holding TFT 82, the current control TFT 83, and the light emission control TFT 84, as in the X power supply line 12R. After being formed, it is formed by patterning into a predetermined shape. More specifically, the conductive film 29 is patterned on the lower layer side of the Y power supply line 13 so as to extend along the Y direction, and is provided for each pixel circuit 70. The Y power line 13G is formed as the same layer as the source electrodes of the elements such as the write control TFT 81, the holding TFT 82, the current control TFT 83, and the light emission control TFT 84 formed on the element substrate 8, and then patterned into a predetermined shape. It is formed by being.

  2 and 3, the conductive film 29 and the Y power supply line 13G are electrically connected via contact portions 31 and 32 which are examples of the “auxiliary conductive portion” according to the present invention. The potential of the conductive film 29 is maintained at the same potential as the potential of the Y power supply line 13, and charges corresponding to the potential difference between the conductive film 29 and the semiconductor layer 22 are held in the storage capacitor 20 as will be described in detail later. Since the gate insulating film 23 is interposed between the conductive film 29 and the semiconductor layer 22, it functions as a dielectric film of the storage capacitor 20.

  In this manner, the pixel circuit 70G includes the storage capacitors 10 and 20, and these two storage capacitors can hold charges corresponding to the data signal in these storage capacitors. According to the charges held in the holding capacitors 10 and 20, current control is performed on the voltage corresponding to the charges held in the holding capacitors 10 and 20 even in a period in which the scanning signal is not supplied to the pixel circuit 70G in one vertical scanning period. It can be applied to the gate of the TFT 83. By maintaining the ON state of the current control TFT 83 that constitutes the current path through which the drive current flows from the Y power supply line 13G to the organic EL element 72G, it is possible to keep the organic EL element lit for one vertical scanning period. . According to the storage capacitors 10 and 20, it is possible to provide a larger capacity for each pixel circuit 70 </ b> G than when the storage capacitor is formed along one of the X power supply line 12 and the Y power supply line 13. The organic EL device 1 can be driven in an active matrix without degrading the display performance. The pixel circuits 70R and 70B also have two storage capacitors like the pixel circuit 70G, and the organic EL elements included in the pixel circuits 70R and B can be continuously lit during one vertical scanning period. It is.

  2 and 3, the contact portions 31 and 32 constitute an example of the “first conductive portion” according to the present invention. The contact parts 31 and 32 are made of a conductive material filled in the contact holes 50 and 51, and electrically connect the conductive film 29 and the Y power supply line 13G. The contact holes 50 and 51 in which the contact portions 31 and 32 are formed penetrate the insulating film 24 formed on the conductive film 29 and the X power supply line 12R from the Y power supply line 13G to the conductive film 29. The contact portions 31 and 32 are electrically connected to both ends of the conductive film 29 along the Y direction in the drawing. According to the contact portions 31 and 32 and the conductive film 29, the electrical resistance of the Y power supply line 13G including the conductive film 29 can be reduced by the amount that the conductive film 29 is electrically connected to the Y power supply line 13G. More specifically, the electrical resistance of the Y power supply line 13G can be reduced with respect to the power supplied to the pixel circuit 70G along the Y direction in the drawing. Similarly, the other pixel circuits 70R and 70B have the conductive film 29, and the Y power supply lines 13R and 13B are electrically connected to the conductive film 29 included in the pixel circuits 70R and 70B. In addition to arranging the X power supply line 12 and the Y power supply line 13 in a grid pattern in the image display area 110, by reducing the electrical resistance of the Y power supply line 13, when supplying power to each pixel circuit 70, Y A voltage drop generated in the power supply line 13 can be reduced, and luminance unevenness of the organic EL element in the image display region 110 can be reduced.

  As shown in FIG. 1, the X power supply line 12 and the Y power supply line 13 are arranged in a grid, so that the two storage capacitors 10 and 20 are secured, and the opening of each pixel region including the pixel circuit 70 is secured. It is possible to increase the rate. When the storage capacitor is configured with only the X power supply line 12 and the semiconductor layer 22 as a pair of capacitance electrodes, or when the storage capacitor is configured with only the Y power supply line 13 and the semiconductor layer 22 as a pair of capacitance electrodes, In order to increase the area, it is necessary to increase the area of each capacitor electrode. That is, when the width dimension along the Y direction of the X power supply line 12 is increased, or the width dimension along the X direction of the Y power supply line 13 is increased, the storage capacity is increased. When the storage capacitor is provided only along one of the X direction and the Y direction as described above, the width dimension of the X power supply line 12 or the Y power supply line 13 is increased to increase the storage capacity, and the pixel including the pixel circuit 70 is included. The aperture ratio of the area is lowered.

  Therefore, by providing the storage capacitors 10 and 20 along the X direction and the Y direction as in the present embodiment, it is possible to suppress a decrease in the aperture ratio in each pixel region while securing a required storage capacitor. That is, by using the X power supply line 12 and the conductive film 29 extending along the Y direction as the capacitance electrodes, respectively, the width dimensions of the X power supply line 12 and the Y power supply line 13 are reduced while ensuring a sufficient capacity. it can. As a result, the area where the light emitted from the organic EL element is blocked by the X power supply line 12 and the Y power supply line 13 can be reduced, and the aperture ratio in the pixel area can be increased. Thereby, the brightness | luminance of the light radiate | emitted from the pixel circuit 70 can be raised with respect to the electrical energy inject | poured into an organic EL element, and the organic EL apparatus 1 can display an image efficiently.

  In FIG. 3, the conductive film 29 is separated from the X power supply line 12R along the Y direction, and is electrically insulated from the X power supply line 12R in the Y direction. The Y power supply line 13G is electrically connected to the source side of the current control TFT 83 via a contact portion 33 formed by filling a contact hole with a conductive material. The X power supply line 12R is not electrically connected to each element of the pixel circuit 70G including the organic EL element 72G that emits green light. Further, since the X power supply line 12R and the Y power supply line 13G are not electrically connected to each other, the power supply line for supplying power to the pixel circuit 70G is only the Y power supply line 13G. Only the power for the organic EL element that emits green light is supplied to the pixel circuit 70G, and the power for the organic EL element that emits red or blue light is not supplied to the pixel circuit 70G. A power source such as an appropriate current or voltage for supplying light of green wavelength to the element 72G is supplied. Similarly, the pixel circuits 70R and 70B including the organic EL elements that emit red or blue light are supplied only with power for the organic EL elements that emit red light or the organic EL elements that emit blue light. As described above, among the pixel circuits 70 arranged according to the intersection of the X power supply line 12 and the Y power supply line 13, the X power supply line and the Y power supply line for supplying power for organic EL elements that emit light of different colors are The pixel circuits 70 are supplied with an appropriate power source that is electrically insulated from each other and that matches the emission color of the organic EL element.

  In FIG. 2, the scanning line 112 includes a write control signal line 112A and a light emission control signal line 112B. The write control signal line 112A and the light emission control signal line 112B are extended along the X direction. The write control signal line 112 </ b> A is formed on the gate insulating film 23 as a conductive layer that is the same layer as the gates of the write control TFT 81 and the holding TFT 82. A part of the write control signal line 112 </ b> A functions as a gate of the write control TFT 81 and the holding TFT 82. The write control TFT 81 and the holding TFT 82 are turned on / off according to a write control signal supplied via the write control signal line 112A.

  A part of the light emission control signal line 112B functions as a gate of the light emission control TFT 84, and the light emission control TFT 84 is turned on / off according to the light emission control signal supplied via the light emission control signal line 112B. Note that the emission control signal line 112B may be provided individually according to the emission color of the organic EL element. For example, FIG. 2 shows the light emission control signal line 112B electrically connected to the light emission control TFT 84 included in the pixel circuit 70G, but the light emission control signal lines for the red and blue organic EL elements are pixel circuits. 70R and 70B may be individually connected. By individually connecting the emission control signal line to the pixel circuit 70 according to the emission color of the organic EL element, it is possible to cause the organic EL elements that are arranged in the same row to emit light different from each other to emit light independently of each other. It is.

  The electrical connection configuration and operation of the pixel circuit 70G will be described with reference to FIG. The other pixel circuits 70R and 70B operate in the same procedure as the pixel circuit 70G except that the type of power supplied and a light emission control signal described later are different.

  In FIG. 5, the source of the current control TFT 83 is electrically connected to the Y power line 13, while the drain is electrically connected to the source of the light emission control TFT 84, the drain of the write control TFT 81, and the source of the holding TFT 82. It is connected to the. The gate of the write control TFT 81 and the gate of the holding TFT 82 are electrically shared, and a part of the write control signal line 112 </ b> A constituting the scanning line 112 functions as the gate of the write control TFT 81 and the gate of the holding TFT 82. The source of the write control TFT 81 is electrically connected to the data line 114. The drain of the holding TFT 82 is electrically connected to one end of the holding capacitors 10 and 20. The write control TFT 81 and the holding TFT 82 are turned on when a write control signal supplied via the write control signal line 112A becomes a high potential, that is, an H level.

  When the holding TFT 82 becomes active, the source and drain of the holding TFT 82 are brought into conduction. In this state, the gate and drain of the current control TFT 83 become conductive, and the current control TFT 83 functions as a simple diode.

  On the other hand, as the H level write control signal is supplied, the write control TFT 81 whose gate voltage is shared with the holding TFT 82 is also turned on. Eventually, during the period in which the write control signal is at the H level, a current flows through the write control TFT 81 and the holding TFT 82 in accordance with the data signal supplied via the data line 114, and the voltage is applied to the gate of the current control TFT 83 in accordance with this current. Is applied. Here, a current corresponding to the gate signal flows into one of the ends of the storage capacitors 10 and 20 that is electrically connected to the drain side of the storage TFT 82, and according to the potential difference between both ends of the storage capacitors 10 and 20. The stored charges are held in the holding capacitors 10 and 20. More specifically, the storage capacitor 10 holds a charge corresponding to the potential difference between the X power supply line 12R and the semiconductor layer 22, and the storage capacitor 20 includes the conductive film 29 and the semiconductor layer that have the same potential as the Y power supply line 13G. The electric charge according to the potential difference between 22 is held. The charges held in the holding capacitors 10 and 20 are charges that define a drive current supplied to the organic EL element 72G via the current control TFT 83. Hereinafter, a period during which charges are held in the holding capacitors 10 and 20 is referred to as a “programming stage”.

  When the writing control signal is controlled to a low potential (that is, L level), the programming stage of the row including the pixel portion 70G is finished. More specifically, the programming stage in row L2 shown in FIG. That is, the supply of the write control signal performed in one frame to the row L2 including the pixel circuit 70G is completed. When the programming stage ends, the holding TFT 82 and the write control TFT 81 are turned off. However, since the charges are held in the holding capacitors 10 and 20, the potential of the gate of the current control TFT 83 is held at the potential in the pro-gramming stage. Therefore, the holding capacitors 10 and 20 can hold a charge that can apply a sufficiently large voltage to the gate of the current control TFT 83 in one frame, that is, in one vertical scanning period, and the holding capacitor is insufficient. Thus, the occurrence of flicker can be reduced.

  An H level light emission control signal is supplied at a predetermined timing to the light emission control signal line 112B of the pixel circuit 70G after the completion of the programming stage. When the light emission control signal is supplied, the light emission control TFT 84 is turned on, and a current based on the potential difference between the gate of the current control TFT 83 and the Y power supply line 13G flows between the source and drain of the current control TFT 83. This current flows through a path that sequentially passes through the Y power line 13G, the current control TFT 83, the light emission control TFT 84, and the organic EL element 72G, and the organic EL element 72G emits light. Since the light emission of the organic EL element 72G is performed based on the current value programmed in advance in the previous programming stage, the light emission period of the organic EL element 72G is also referred to as a “reproduction stage”.

  As described above, the organic EL device 1 performs the scanning by executing the programming stage in units of rows in the image display region 110, and sequentially switching the rows in which the programming stage is executed. The line in which the programming stage is completed moves to the reproduction stage with a predetermined delay time. The switching timing of the programming stage and the reproduction stage is appropriately executed by the scanning line driving circuit 110 shown in FIG. For example, the scanning line driving circuit 110 is controlled so that the programming stage and the re-production stage are not simultaneously executed for an arbitrary row Li.

  Next, another connection configuration of the X power supply line 12 and the Y power supply line 13 to the pixel circuit 70 will be described with reference to FIGS. 6 and 8. In the pixel circuit 70R shown in FIGS. 6 to 8, an X power supply line 12R and a Y power supply line 13R for supplying power to the pixel circuit 70 including organic EL elements that emit light of the same color are electrically connected to the pixel circuit 70R. The aspect which is shown is shown. FIG. 6 is a plan view showing a specific configuration of the pixel circuit 70R, and more specifically, a plan view showing a specific configuration of the pixel circuit 70R formed in the region B in FIG. . In the region B shown in FIG. 1, two pixel circuits 70R are formed side by side in the vertical direction in the drawing. 7 is a cross-sectional view taken along the line VII-VII ′ of FIG. FIG. 8 is a circuit diagram of the pixel circuit 70R shown in FIG. The pixel circuit 70R is the above-described pixel circuit 70G except that the organic EL element emits red light and that the X power supply line 12R and the Y power supply line 13R are electrically connected. It has the same configuration as. Therefore, for convenience of explanation, in FIGS. 6 to 8, portions common to FIGS. 1 to 5 will be described with common reference numerals.

  6 and 7, the X power supply line 12R and the Y power supply line 13R are electrically connected via a contact part 35 which is an example of a “second conductive part” according to the present invention. The contact portion 35 is formed by filling a conductive material into a contact hole 52 that penetrates the insulating film 24 interposed between the X power supply line 12R and the Y power supply line 13R from the X power supply line 12R to the Y power supply line 13R. Therefore, the X power supply line 12R and the Y power supply line 13R that are electrically connected to the outer power supply line 11R shown in FIG. 1 supply the power for the organic EL element that emits red light to the pixel circuit 70R.

  In FIG. 8, the pixel circuit 70R is supplied with power for an organic EL element that emits red light from both the X power line 12R and the Y power line 13R. Since the X power supply line 12R and the Y power supply line 13R have a common potential, one ends of the storage capacitors 10 and 20 have a common potential. Therefore, the storage capacitors 10 and 20 hold charges corresponding to the potential difference between the X power supply line 12R and the Y power supply line 13R and the semiconductor layer 22, respectively. Similarly, the pixel circuit 70G disposed in a region where the X power supply line 12G and the Y power supply line 13G that supply power for an organic EL element that emits green light intersect with each other supplies power from these two power supply lines. receive. Similarly, the pixel circuit 70B disposed in the region where the X power supply line 12B and the Y power supply line 13B intersect is similarly supplied with power from these two power supply lines.

  As described above, the X power supply line 12 and the Y power supply line 13 are provided in the pixel circuit 70 arranged in accordance with the region where the X power supply line 12 and the Y power supply line that supply power corresponding to the emission colors of the same color intersect each other. Power is supplied from both. Therefore, the plurality of pixel circuits 70 arranged in the image display region 110 are supplied with power from only the Y power line according to the combination of the types of power supplied from the X power line and the Y power line. The pixel circuit 70 can be roughly divided into two types of pixel circuits, which are supplied with power from both the X power supply line 12 and the Y power supply line 13. According to such a connection form of the power supply lines and the pixel circuits, the pixel circuits 70 including the organic EL elements that emit light of a plurality of colors are arranged in a matrix form, and a plurality of the pixel circuits 70 arranged in a grid form on the pixel circuits 70. Even when power is supplied from various power lines, power corresponding to different colors is not supplied to the same pixel circuit 70, and appropriate power corresponding to the emission color is supplied to each organic EL element. it can.

  As described above, according to the organic EL device 1 according to the present embodiment, the image display area is reduced by reducing the luminance unevenness by reducing the electric resistance of the entire power supply line that supplies power to the pixel circuit, and by improving the aperture ratio. The overall luminance can be improved, and flicker can be reduced by securing a sufficient storage capacity, and a high-performance electro-optical device in which these multiple problems are solved can be provided. The organic EL device 1 according to the present embodiment includes other types of pixel circuits such as other current program type pixel circuits, voltage program type pixel circuits, voltage comparison type pixel circuits, and subframe type pixel circuits. It is also possible to adopt this, and the above-described plurality of problems can be solved at once by applying the above-described connection form to these pixel circuits.

(Electronics)
Next, with reference to FIG. 9 and FIG. 10, each aspect of the electronic apparatus including the organic EL device 1 described above will be described.

<A: Mobile computer>
An example in which the organic EL device 1 which is an example of the organic EL device described above is applied to a mobile personal computer will be described with reference to FIG. FIG. 9 is a perspective view showing the configuration of the computer 1200.

  In FIG. 9, a computer 1200 includes a main body 1204 provided with a keyboard 1202 and a display unit 1206 having a display unit 1005 configured using the organic EL device 1 (not shown). Since the display unit 1005 includes the organic EL device 1 described above, it is possible to reduce luminance unevenness in the image display region, improve the aperture ratio, and reduce flicker, and display a high-quality image. Further, the display unit 1005 can perform image display in full color display.

<B: Mobile phone>
Further, an example in which the above-described organic EL device 1 is applied to a mobile phone will be described with reference to FIG. FIG. 10 is a perspective view showing the configuration of the mobile phone 1300.

  In FIG. 10, a mobile phone 1300 includes a display unit 1305 having an organic EL device according to an embodiment of the present invention, together with a plurality of operation buttons 1302.

  Since the display portion 1305 has the same configuration as the above-described display portion 1005, in addition to being able to display a high-quality image, portability that is important as a portable phone is not impaired. In addition, the plurality of organic EL elements included in the display portion 1305 emit light of the three primary colors of red, green, and blue, so that the display portion 1305 can perform image display in full color display.

  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 electronic apparatus including an electro-optical device such as an apparatus and an electro-optical device such as an organic EL device is also included in the technical scope of the present invention.

It is a block diagram which shows the electrical connection structure of the organic electroluminescent apparatus which concerns on this embodiment. It is a top view which shows the one aspect | mode of the structure of the pixel circuit which concerns on this embodiment. It is the III-III 'sectional view taken on the line of FIG. It is the IV-IV 'sectional view taken on the line of FIG. It is a block diagram which shows the one aspect | mode of the electrical connection structure of the pixel circuit of this embodiment. It is a top view which shows the other aspect of a structure of the pixel circuit which concerns on this embodiment. It is the VII-VII 'sectional view taken on the line of FIG. It is a block diagram which shows the other aspect of the electrical connection structure of the pixel circuit of this embodiment. It is a perspective view which shows an example of the electronic device which concerns on this embodiment. It is a perspective view which shows the other example of the electronic device which concerns on this embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Organic EL device, 12 ... X power supply line, 13 ... Y power supply line, 10, 20 ... Retention capacity, 22 ... Semiconductor layer, 29 ... Conductive film, 72 ... Organic EL element 112 ... scanning line, 114 ... data line, 31, 32, 35 ... contact part

Claims (7)

On the board
A plurality of data lines and a plurality of scanning lines intersecting each other;
A plurality of light emitting elements arranged to correspond to the intersections of the plurality of data lines and the plurality of scanning lines, and emitting light of different colors;
A plurality of main power lines that are provided to extend along the data lines and supply different power sources to the light emitting elements according to the colors;
A plurality of sub power supply lines that are provided on the lower layer side of the main power supply line through an interlayer insulating film so as to extend along the scanning line and supply different power to the light emitting elements according to the color When,
The light emitting element includes the same layer as the sub power line and is provided below the main power line via the interlayer insulating film for each light emitting element, and extends in the extending direction in which the main power line extends. A first capacitor electrode electrically insulated from the sub-power supply line and electrically connected to the main power supply line via a first conductive portion penetrating the interlayer insulating film;
Provided via a dielectric film on the lower layer side of the sub power supply line so as to extend along each of the main power supply line and the sub power supply line for each light emitting element, and is supplied from the data line And a second capacitor electrode constituting a first storage capacitor and a second storage capacitor for holding a charge corresponding to a data signal between the sub power supply line and the first capacitor electrode. An electro-optical device. The electro-optical device according to claim 1, wherein the sub power supply line is formed of the same layer as the scanning line. The second capacitor electrode is formed of the same layer as a semiconductor film that forms a thin film transistor that controls light emission of the light emitting element, and the dielectric film is formed of the same layer as a gate insulating film of the thin film transistor. The electro-optical device according to claim 1 or 2. The first capacitor electrode is provided in a predetermined region on the dielectric film so as to extend along the main power line.
2. The first conductive portion includes a plurality of auxiliary conductive portions penetrating the interlayer insulating film so as to electrically connect the main power supply line and the first capacitance electrode. 4. The electro-optical device according to any one of items 1 to 3. In the region where one main power supply line and one sub power supply line supplying power to light emitting elements emitting light of the same color among the main power supply line and the sub power supply line intersect each other, the one power supply line and the one power supply line 5. The electro-optical device according to claim 1, wherein the one sub-power supply line is electrically connected via a second conductive portion that penetrates the interlayer insulating film. The electro-optical device according to claim 1, wherein the light emitting element is an organic EL element. An electronic apparatus comprising the electro-optical device according to any one of claims 1 to 6.

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