JP2005338640A - Capacitive element and capacitive display device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a capacitive element capable of high-definition image display free of luminance unevenness. <P>SOLUTION: The capacitive element 1 is equipped with a plurality of 1st electrodes 120 provided extending in parallel to one another, a function layer 130 provided to cover the plurality of 1st electrodes, a plurality of 2nd electrodes 140 provided extending in parallel to one another at an angle to the extending direction of the 1st electrodes 120, a 1st driving circuit 151 to which one end of each of the plurality of 1st electrodes 120 is electrically connected, and a 2nd driving circuit 152 to which one end of each of the plurality of 2nd electrodes 140 is electrically connected. A pixel is constituted at each of intersections of the 1st electrodes 120 and 2nd electrodes 140 and the plurality of 1st electrodes 120 are provided with an applied voltage correcting means so that a voltage applied to the function layer 130 is nearly equal among a plurality of pixels along the plurality of 2nd electrodes 140. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a capacitive element and a capacitive display device using the capacitive element.

  In recent years, with the diversification of information processing equipment, there is an increasing demand for planar elements that consume less power and can be made thinner than cathode ray tubes (CRTs) that have been conventionally used. Examples of such a planar element include a liquid crystal element that is a capacitive element and an electroluminescence element (hereinafter may be abbreviated as “EL element”). Among them, the inorganic EL element has characteristics such as all-solid-state type, high-speed response, and self-luminous property, and therefore, research and development are actively performed.

  FIG. 7 is a schematic cross-sectional view of a conventional inorganic EL element 4.

  FIG. 8 is a schematic plan view showing an electrode structure of a conventional inorganic EL element 4.

  For convenience of explanation, the functional layer 430 is not shown in FIG.

  The inorganic EL element 4 includes a substrate 410, a plurality of first electrodes 420 provided on the substrate 410 so as to extend in parallel to each other, and a functional layer 430 provided so as to cover the first electrode 420. A second electrode 440 provided on the functional layer 430 so as to extend in parallel with each other in a direction orthogonal to the extending direction of the first electrode 420, and a first drive circuit 451. And a second drive circuit 452, a display control circuit 460 for inputting a voltage application signal corresponding to a display image, and a first drive circuit for applying a voltage to the first electrode 420 according to the voltage application signal input from the display control circuit 460. 451 and a second drive circuit 452 that applies a voltage to the second electrode 440 in accordance with a voltage application signal input from the display control circuit 460.

  In the inorganic EL element 4, the first drive circuit 451 and the second drive circuit 452 correspond to the display image input from the display control circuit 460 among the plurality of first electrodes 420 and the plurality of second electrodes 440. A voltage is selectively applied to the first electrode 420 and the second electrode 440 according to the voltage application signal. And only the pixel comprised in the intersection part of the 1st electrode 420 to which the voltage was applied, and the 2nd electrode 440 selectively light-emitted, and it is comprised so that the image display according to a voltage application signal may be performed. Yes. The first insulating layer 431 and the second insulating layer 433 have a function of preventing the dielectric breakdown of the inorganic EL element 4 to which a high voltage is applied and operating the inorganic EL element 4 stably in a high electric field. It is.

By the way, when the inorganic EL element 4 is a top emission type inorganic EL element that extracts light emitted from the light emitting layer 432 from the second electrode 440 side, or the organic layer is formed from both the second electrode 440 side and the first electrode 420 side. In the case of an inorganic EL element that takes out light emission of 432, the second electrode 440 is made of indium tin oxide (hereinafter referred to as “indium tin oxide”) from the viewpoint of realizing high light emission efficiency of the light emitting layer 432 from the second electrode 440 side. It is preferably composed of a transparent conductive material such as “ITO” or indium zinc oxide (hereinafter sometimes abbreviated as “IZO”).
JP-A-10-223373

  However, the second electrode 440 made of a transparent conductive material such as ITO has a larger electric resistance than a metal material such as Al that has been conventionally used as an electrode material. Therefore, in such an inorganic EL element 4, the voltage applied by the second electrode 440 is lower in the pixels farther from the second drive circuit 452 due to the voltage drop due to the wiring resistance of the second electrode 440. Therefore, such an inorganic EL element 4 has a problem in that the voltage applied by the first electrode 420 and the second electrode 440 varies among pixels, resulting in luminance unevenness.

  Hereinafter, the principle of occurrence of luminance unevenness due to the voltage drop of the second electrode 440 will be described in detail with reference to FIG.

  FIG. 9 is an explanatory diagram for explaining a voltage drop in the pixels A and B of the inorganic EL element 4 shown in FIG.

  For convenience of explanation, the functional layer 430 is not shown in FIG.

  As shown in FIG. 9, the voltage input from the first drive circuit 451 is +40 V, the voltage input from the second drive circuit 452 is −200 V, and the wiring resistance of the second electrode 440 between the pixel A and the pixel B When the voltage drop due to is 5%, a voltage of +40 V is applied from the first electrode 420 to the pixel A to which the first drive circuit 451 and the second drive circuit 452 are directly connected, and the second electrode Since a voltage of -200V is applied from 440, a voltage of -240V in total is applied. On the other hand, +40 V is applied from the first electrode 420 to the pixel B connected to the second drive circuit 452 via the pixel A, and the voltage effect is caused by the wiring resistance of the second electrode 440 from the second electrode 440. Therefore, −190V corresponding to 95% of the voltage −200V input from the second drive circuit 452 is applied, and a total voltage of −230V is applied. That is, a difference of 10 V is generated in the applied voltage between the pixel A and the pixel B. Therefore, luminance unevenness occurs between the pixel A and the pixel B.

  In view of such a problem, there has been proposed an organic EL display in which a plurality of second electrodes are alternately drawn out to one side of a substrate and another side opposite to the one side and connected to a drive circuit. (For example, “Patent Document 1” and the like).

  In this organic EL display, since the plurality of second electrodes are alternately drawn out to one side of the substrate and the other side opposite to the one side, a voltage drop occurs in each of the plurality of second electrodes. However, it is described that a uniform luminance distribution can be realized as a whole screen, and characters, graphics, etc. can be displayed with high quality.

  However, in this organic EL display, when attention is paid to each of the plurality of second electrodes, the luminance decreases due to a voltage drop as the pixel is distant from the pixel close to the driving circuit. There is a problem that luminance unevenness occurs between these pixels, and a sufficiently high-definition image cannot be displayed.

  The present invention has been made in view of the above points, and an object of the present invention is to reduce luminance variation between pixels caused by a voltage drop due to wiring resistance of an electrode, and to display a high-definition image without luminance unevenness. It is to realize an organic EL element that can be used.

The capacitive element according to the present invention includes a plurality of first electrodes provided to extend in parallel to each other,
A functional layer provided to cover the plurality of first electrodes;
A plurality of second electrodes provided on the functional layer so as to extend in parallel with each other at an angle with respect to a direction in which the first electrode extends;
A first drive circuit in which one end of each of the plurality of first electrodes is electrically connected;
A second drive circuit in which one end of each of the plurality of second electrodes is electrically connected;
A pixel is formed at each intersection of the first electrode and the second electrode,
The plurality of first electrodes are provided with applied voltage correction means so that the voltages applied to the functional layers in the plurality of pixels along each of the plurality of second electrodes are substantially the same. .

  According to the capacitive element of the present invention, applied voltage correction means is applied to each of the plurality of first electrodes. Then, the voltage applied to the functional layer by the first electrode and the second electrode is substantially the same in the plurality of pixels along each of the plurality of second electrodes by the applied voltage correction means. . Therefore, according to the capacitive element according to the present invention, it is possible to effectively suppress the occurrence of luminance unevenness in a plurality of pixels along each of the plurality of second electrodes. Therefore, it is possible to realize a capacitive element capable of displaying a high-definition image without luminance unevenness.

  Further, in the capacitive element according to the present invention, the applied voltage correction means is configured such that the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes is closer to the first drive circuit. The lead-out electrode may have a large electric resistance.

  According to this configuration, the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes has a larger electrical resistance, and the first electrode constituting the pixel closer to the second drive circuit extends along each of the plurality of second electrodes. In the plurality of pixels, the voltage applied to the functional layer by the first electrode and the second electrode is configured to be substantially the same.

  That is, the voltage applied by the second electrode is lowered due to the voltage drop due to the wiring resistance of the second electrode so that the voltage applied to each pixel is substantially the same by the first electrode and the second electrode. The pixel farther from the second drive circuit of each of the second electrodes is connected to the first electrode having a lead-out electrode having a lower electrical resistance, and a higher voltage is applied to the first electrode. Yes. Therefore, according to this configuration, it is possible to effectively suppress the occurrence of luminance unevenness in a plurality of pixels along each of the plurality of second electrodes, and to enable high-definition image display without luminance unevenness. An element can be realized.

  Further, in the capacitive element according to the present invention, the applied voltage correction means is configured such that the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes is closer to the first drive circuit. The lead-out electrode may be long.

  According to this configuration, the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes becomes longer as the lead-out electrode to the first drive circuit becomes longer. The first electrode constituting the pixel closer to each second drive circuit is configured such that the lead-out electrode has a larger electric resistance. In the plurality of pixels along each of the plurality of second electrodes, the first electrode The voltage applied to the functional layer by the electrode and the second electrode is configured to be substantially the same.

  That is, the voltage applied by the second electrode is lowered due to the voltage drop due to the wiring resistance of the second electrode so that the voltage applied to each pixel is substantially the same by the first electrode and the second electrode. The pixel farther from the second drive circuit of each of the second electrodes is connected to the first electrode having a lead-out electrode that is shorter and has a smaller electrical resistance, and a higher voltage is applied to the first electrode. Has been. Therefore, according to this configuration, it is possible to effectively suppress the occurrence of luminance unevenness in a plurality of pixels along each of the plurality of second electrodes, and to enable high-definition image display without luminance unevenness. An element can be realized.

  Further, according to the capacitive element of the present invention, the applied voltage correction means is configured such that the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes is closer to the first electrode. The routing electrode to the drive circuit may be formed with a narrow width.

  According to this configuration, the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes is formed with a narrower lead-out electrode to the first drive circuit, whereby a plurality of second electrodes are formed. The first electrode constituting the pixel closer to the second drive circuit of each of the two electrodes is configured so that the lead-out electrode has a larger electric resistance. In the plurality of pixels along each of the plurality of second electrodes, The voltage applied to the functional layer by the first electrode and the second electrode is configured to be substantially the same.

  That is, the voltage applied by the second electrode is lowered due to the voltage drop due to the wiring resistance of the second electrode so that the voltage applied to each pixel is substantially the same by the first electrode and the second electrode. The pixel farther from the second drive circuit of each of the second electrodes is connected to the first electrode having a lead-out electrode having a larger width and a smaller electric resistance so that a higher voltage is applied to the first electrode. It is configured. Therefore, according to this configuration, it is possible to effectively suppress the occurrence of luminance unevenness in a plurality of pixels along each of the plurality of second electrodes, and to enable high-definition image display without luminance unevenness. An element can be realized.

  In the capacitive element of the present invention, the applied voltage correction means may be configured such that the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes reaches the first drive circuit. The lead-out electrode may be formed thinly.

  According to this configuration, the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes is formed so that the lead-out electrode to the first drive circuit is formed thinner, thereby the plurality of second electrodes. The first electrode constituting the pixel closer to the second drive circuit of each of the two electrodes is configured so that the lead-out electrode has a larger electric resistance. In the plurality of pixels along each of the plurality of second electrodes, The voltage applied to the functional layer by the first electrode and the second electrode is configured to be substantially the same.

  That is, the voltage applied by the second electrode is lowered due to the voltage drop due to the wiring resistance of the second electrode so that the voltage applied to each pixel is substantially the same by the first electrode and the second electrode. The pixel farther from the second drive circuit of each of the second electrodes is connected to the first electrode having a lead-out electrode that is thicker and has a smaller electrical resistance, and a higher voltage is applied to the first electrode. Has been. Therefore, according to this configuration, it is possible to effectively suppress the occurrence of luminance unevenness in a plurality of pixels along each of the plurality of second electrodes, and to enable high-definition image display without luminance unevenness. An element can be realized.

  In the capacitive element according to the present invention, the second electrode may be a transparent electrode.

  According to this configuration, a top-emission capacitive element that extracts light emitted from the functional layer from the second electrode side, or a capacitive element that extracts light emitted from the functional layer from both the second electrode side and the first electrode side. In this case, it is possible to realize a capacitive element having high efficiency of taking out light emitted from the functional layer from the second electrode side.

The inorganic electroluminescence device according to the present invention includes a plurality of first electrodes provided to extend in parallel to each other,
A functional layer provided to cover the plurality of first electrodes;
A plurality of second electrodes provided on the functional layer so as to extend in parallel with each other at an angle with respect to a direction in which the first electrode extends;
A first drive circuit in which one end of each of the plurality of first electrodes is electrically connected;
A second drive circuit in which one end of each of the plurality of second electrodes is electrically connected;
A pixel is formed at each intersection of the first electrode and the second electrode,
The plurality of first electrodes are provided with applied voltage correction means so that the voltages applied to the functional layers in the plurality of pixels along each of the plurality of second electrodes are substantially the same. .

  According to the inorganic EL element of the present invention, the applied voltage correction means is applied to the plurality of first electrodes. And the voltage applied to the functional layer in the plurality of pixels along each of the plurality of second electrodes by the applied voltage correcting means is configured to be substantially the same. Therefore, it is possible to effectively suppress occurrence of luminance unevenness in a plurality of pixels along each of the plurality of second electrodes. Therefore, an inorganic EL element capable of displaying a high-definition image without luminance unevenness can be realized.

A capacitive element according to the present invention includes a plurality of first electrodes provided to extend in parallel to each other,
A functional layer provided to cover the plurality of first electrodes;
A plurality of second electrodes provided on the functional layer so as to extend in parallel with each other at an angle with respect to a direction in which the first electrode extends;
A first drive circuit in which one end of each of the plurality of first electrodes is electrically connected;
A second drive circuit in which one end of each of the plurality of second electrodes is electrically connected;
A pixel is formed at each intersection of the first electrode and the second electrode,
The plurality of first electrodes are provided with applied voltage correction means so that the voltages applied to the functional layers in the plurality of pixels along each of the plurality of second electrodes are substantially the same. An element is provided.

  As described above, the capacitive element included in the capacitive element according to the present invention can display a high-definition image without luminance unevenness. Therefore, the capacitive element according to the present invention including the capacitive element can display a high-definition image without luminance unevenness.

The inorganic EL element according to the present invention includes a plurality of first electrodes provided so as to extend in parallel to each other,
A functional layer provided to cover the plurality of first electrodes;
A plurality of second electrodes provided on the functional layer so as to extend in parallel with each other at an angle with respect to a direction in which the first electrode extends;
A first drive circuit in which one end of each of the plurality of first electrodes is electrically connected;
A second drive circuit in which one end of each of the plurality of second electrodes is electrically connected;
A pixel is formed at each intersection of the first electrode and the second electrode,
The plurality of first electrodes is provided with an applied voltage correction means so that the voltages applied to the functional layers in the plurality of pixels along each of the plurality of second electrodes are substantially the same. A luminescence element is provided.

  As described above, the inorganic EL element included in the inorganic EL element according to the present invention is capable of high-definition image display without luminance unevenness. Therefore, the inorganic EL element according to the present invention including the inorganic EL element can display a high-definition image without luminance unevenness.

  As described above, according to the present invention, the occurrence of luminance unevenness in a plurality of pixels along each of the plurality of second electrodes can be effectively suppressed, so that uniform image display can be performed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of an inorganic EL element 1 according to the first embodiment.

  FIG. 2 is a schematic cross-sectional view of the inorganic EL element 1 according to the first embodiment.

  FIG. 3 is a schematic plan view showing the electrode structure of the inorganic EL element 1 according to the first embodiment.

  For convenience of explanation, the functional layer 130 is not shown in FIG.

  The inorganic EL element 1 includes a substrate 110, a plurality of first electrodes 120 provided on the substrate 110 so as to extend in parallel to each other, and a functional layer 130 provided so as to cover the first electrode 120. The inorganic EL panel 100 including the second electrodes 140 provided on the functional layer 130 so as to extend in parallel with each other perpendicular to the extending direction of the first electrode 120, and the first drive circuit 151. And a second drive circuit 152 that inputs a voltage application signal corresponding to the display image, and a first drive circuit that applies a voltage to the first electrode 120 in accordance with the voltage application signal input from the display control circuit 160. 151 and a second drive circuit 152 that applies a voltage to the second electrode 140 in accordance with a voltage application signal input from the display control circuit 160.

  In the inorganic EL element 1, the first drive circuit 151 and the second drive circuit 152 correspond to a display image input from the display control circuit 160 among the plurality of first electrodes 120 and the plurality of second electrodes 140. A voltage is selectively applied to the first electrode 120 and the second electrode 140 according to the applied voltage application signal. Then, only the pixels configured at the intersections of the first electrode 120 and the second electrode 140 to which a voltage is applied emit light selectively, thereby displaying an image corresponding to the voltage application signal. Yes.

The substrate 110 can be made of, for example, high-temperature fired ceramics such as alumina (Al ₂ O ₃ ) and holsterite (2MgO / SiO ₂ ), crystallized glass, or glass such as quartz glass. However, the substrate 110 is not limited to these as long as it has insulating properties and can ensure the mechanical strength of the inorganic EL element 1.

  The first electrode 120 and the second electrode 140 have a function of applying a voltage to the functional layer 130. The first electrode 120 and the second electrode 140 are, for example, a metal material such as gold (Au), silver-palladium (Ag—Pd), or nickel (Ni), indium tin oxide (ITO), or indium zinc oxide. Although it can be made of a transparent conductive material such as (IZO), it is not limited to this.

  In addition, the inorganic EL element 1 takes out the light emission of the light emitting layer 132 from the top emission inorganic EL element that takes out the light emission of the light emitting layer 132 from the second electrode 140 side or the light emission layer 132 from both the first electrode 120 side and the second electrode 140 side. In the case of an inorganic EL element of the type, the first electrode 120 is more preferably composed of a transparent electrode material such as ITO or IZO. This is because by configuring the second electrode 140 with a transparent electrode, high emission efficiency of the light emitting layer 132 can be realized.

  The first electrode 120 and the second electrode 140 are more preferably formed to have a layer thickness of 0.2 to 5 μm from the viewpoint of specific resistance. Note that the first electrode 120 and the second electrode 140 may be formed of different materials or of the same material.

The first insulating layer 131 and the second insulating layer 133 have a function of preventing the dielectric breakdown of the inorganic EL panel 100 and a function of increasing the amount of charge supplied to the light emitting layer 132. Therefore, the first insulating layer 131 and the second insulating layer 133 are preferably made of a material having a high dielectric constant (4 or more) and high electrical insulation (insulation resistance value 1 × 10 ⁸ Ω or more). Examples of such materials include nitride materials such as SiN ₄ , oxide materials such as SiO ₂ , Ta ₂ O ₅ , and Al ₂ O ₃ , barium titanate (BaTiO ₃ ), or lead relaxor (Pb (Nb ) _X (Mg) _y O ₃ ) and the like, but not limited thereto. The first insulating layer 131 and the second insulating layer 133 are more preferably configured to have a layer thickness of 10 to 30 μm. According to this configuration, dielectric breakdown of the inorganic EL panel 100 can be more effectively prevented.

The light emitting layer 132 is formed by a light emitting center that is excited by a voltage applied by the first electrode 120 and the second electrode 140 and returns to the ground state with light emission, and a base material that protects the light emitting center. Yes. Examples of the emission center include manganese (Mn) ions, copper (Cu) ions, and rare earth ions, but are not limited thereto. Examples of the base material include, but are not limited to, zinc sulfide (ZnS), strontium sulfide (SrS), SrGaS ₄ , and BaAl ₂ S ₄ . For example, when manganese (Mn) is used as the emission center and zinc sulfide (ZnS) is used as the base material, orange light emission can be obtained. In addition, when copper (Cu) is used as the emission center and strontium sulfide (SrS) is used as the base material, blue light emission can be obtained.

  In this inorganic EL element 1, the pixel farther from the second drive circuit 152 of each of the plurality of second electrodes 140 is applied by the second electrode 140 due to a voltage drop due to the wiring resistance of the second electrode 140. The voltage is lowered. However, in the inorganic EL element 1, the first electrode 120 constituting the pixel closer to the second drive circuit 152 of each of the plurality of second electrodes 140 formed in a stripe shape has a longer lead electrode 120a. The pixel is configured such that a higher voltage is applied to a pixel farther from the second drive circuit 152 of each of the plurality of second electrodes 140. The total voltage applied by the first electrode 120 and the second electrode 140 is substantially the same in all pixels. Therefore, in this inorganic EL element 1, luminance unevenness between pixels can be effectively suppressed, and uniform and high-definition image display can be performed.

  In the present invention, the applied voltage in each pixel being substantially the same means that the difference in applied voltage in each pixel is 3V or less. This is because when the voltage difference between the pixels is 3 V or less, the occurrence of luminance unevenness between the pixels is effectively suppressed.

  Hereinafter, the fact that luminance unevenness is effectively suppressed between pixels in the inorganic EL element 1 will be described in detail with reference to FIG.

  FIG. 6 is an explanatory diagram for explaining a voltage drop in the pixels A and B of the inorganic EL display element 1 shown in FIG.

  As shown in FIG. 6, the voltage input from the first drive circuit 151 is +40 V, the voltage input from the second drive circuit 152 to the pixel A is −200 V, and the second electrode 140 between the pixel A and the pixel B. If the voltage drop due to the wiring resistance of the first electrode 120a connected to the pixel A is 5% and the voltage drop due to the wiring resistance of the lead electrode 120a connected to the pixel A is 20%, the pixel to which the first drive circuit 151 is directly connected A voltage of +40 V is applied to B from the first electrode 120, and −190 V corresponding to 95% of the voltage −200 V applied to the pixel A is applied from the second electrode 140, so that the total − A voltage of 230V is applied. On the other hand, 32 V corresponding to 80% of +40 V is applied from the first electrode 120 to the pixel A connected to the first drive circuit 151 via the routing electrode 120 a whose voltage drop due to the wiring resistance is 20%. Since -200V is applied from the second electrode 140, a total voltage of -232V is applied. That is, the difference in applied voltage between the pixel A and the pixel B is as small as 2 V, and the luminance unevenness between the pixels can be effectively suppressed. Therefore, the inorganic EL element 1 can display a high-definition image without luminance unevenness.

  (Embodiment 2) The inorganic EL element 2 according to Embodiment 2 is the same as the inorganic EL element 1 according to Embodiment 1 except for the structure of the first electrode 220.

  FIG. 4 is a schematic plan view showing an electrode structure of the inorganic EL element 2 according to the second embodiment.

  For convenience of explanation, the functional layer 230 is not shown in FIG.

  As shown in FIG. 4, in the inorganic EL element 2, the pixel farther from the second driving circuit 252 of each of the plurality of second electrodes 240 is caused by the voltage drop due to the wiring resistance of the second electrode 240. The voltage applied by the two electrodes 240 is lowered. However, in this inorganic EL element 2, the first electrode 220 constituting the pixel closer to the second drive circuit 252 of each of the plurality of second electrodes 240 formed in a stripe shape has a longer lead electrode 220a. The pixel is configured such that a higher voltage is applied to a pixel farther from the second drive circuit 252 of each of the plurality of second electrodes 240. In all the pixels, the total voltage applied by the first electrode 220 and the second electrode 240 is configured to be substantially the same. Therefore, in this inorganic EL element 2, there is no luminance unevenness in the pixels and a uniform image display can be performed.

  Further, in the inorganic EL element 2, the lead-out electrodes 220a are alternately drawn out to one side of the inorganic EL panel 200 and the other side opposite to the one side. When the first electrode 120 is pulled out from only one side as in the configuration of FIG. 3, the light emitting display area is biased to one side of the glass substrate, but by configuring the first electrode 220 as in FIG. Both can be wired equally. Therefore, a vertically symmetrical inorganic EL element 2 can be realized.

  (Embodiment 3) The inorganic EL element 3 according to Embodiment 3 is the same as the inorganic EL element 1 according to Embodiment 1 except for the structure of the first electrode 220.

  FIG. 5 is a schematic plan view showing an electrode structure of the inorganic EL element 3 according to the third embodiment.

  For convenience of explanation, the functional layer 230 is not shown in FIG.

  As shown in FIG. 5, in the inorganic EL element 3, the pixel farther from the second drive circuit 352 of each of the plurality of second electrodes 340 is caused by the voltage drop due to the wiring resistance of the second electrode 340. The voltage applied by the two electrodes 340 is lowered. However, in this inorganic EL element 3, the first electrode 320 constituting the pixel farther from the second drive circuit 352 of each of the plurality of second electrodes 340 formed in a stripe shape has a wider lead electrode 320a. The pixel farther from the second drive circuit 352 of each of the plurality of second electrodes 340 is configured to be applied with a higher voltage. In all pixels, the total voltage applied by the first electrode 320 and the second electrode 340 is configured to be substantially the same. Therefore, in this inorganic EL element 3, there is no luminance unevenness in the pixels and a uniform image display can be performed.

  As the inorganic EL device according to the present invention, there is applied voltage correction means for forming a longer lead electrode to the first drive circuit as the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes. Inorganic EL elements 1 and 2 applied to the first electrode, and the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes, the narrower the lead-out electrode to the first drive circuit. The inorganic EL element 3 in which the applied voltage correction means formed in the width is applied to the first electrode has been described as an example. However, the inorganic EL element according to the present invention is not limited to this configuration. For example, the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes is driven first. Needless to say, the applied voltage correction means for thinly forming the routing electrode to the circuit may be an inorganic EL element or the like applied to the first electrode.

  Moreover, the inorganic EL element was illustrated and demonstrated as a capacitive element which concerns on this invention. However, the capacitive element according to the present invention is not limited to this, and may of course be an organic EL element, a liquid crystal element, a plasma element, or the like.

1 is a schematic configuration diagram of an inorganic EL element 1 according to Embodiment 1. FIG. 1 is a schematic cross-sectional view of an inorganic EL element 1 according to Embodiment 1. FIG. 1 is a schematic plan view showing an electrode structure of an inorganic EL element 1 according to Embodiment 1. FIG. 6 is a schematic plan view showing an electrode structure of an inorganic EL element 2 according to Embodiment 2. FIG. 6 is a schematic plan view showing an electrode structure of an inorganic EL element 3 according to Embodiment 3. FIG. 3 is an explanatory diagram for explaining a voltage drop in pixels A and B of the inorganic EL element 1. FIG. It is a schematic sectional drawing of the conventional inorganic EL element 4. FIG. 6 is a schematic plan view of a conventional inorganic EL element 4. FIG. FIG. 4 is an explanatory diagram for explaining a voltage drop in pixels A and B of the inorganic EL element 4.

Explanation of symbols

1, 2, 3, 4 Inorganic EL element 100, 200, 300, 400 Inorganic EL panel 110, 410 Substrate 120, 220, 320420 First electrode 120a, 220a, 230a Lead-out electrode 130, 430 Functional layer 131, 431 First insulation Layer 132, 432 Light emitting layer 133, 433 Second insulating layer 140, 240, 340, 440 Second electrode 151, 251, 351, 451 First driving circuit 152, 252, 352, 452 Second driving circuit 160, 460 Display control circuit

Claims (9)

A plurality of first electrodes provided to extend in parallel with each other;
A functional layer provided to cover the plurality of first electrodes;
A plurality of second electrodes provided on the functional layer so as to extend in parallel with each other at an angle with respect to a direction in which the first electrode extends;
A first drive circuit in which one end of each of the plurality of first electrodes is electrically connected;
A second drive circuit in which one end of each of the plurality of second electrodes is electrically connected;
A capacitive element in which a pixel is formed at each intersection of the first electrode and the second electrode,
The plurality of first electrodes are provided with applied voltage correcting means so that the voltages applied to the functional layers in the plurality of pixels along each of the plurality of second electrodes are substantially the same. element. The capacitive element according to claim 1,
In the applied voltage correction means, the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes has a larger electric resistance in the lead-out electrode to the first drive circuit. Capacitive element characterized by. The capacitive element according to claim 1,
In the applied voltage correcting means, the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes has a longer lead-out electrode to the first drive circuit. Capacitive element characterized by. The capacitive element according to claim 1,
In the applied voltage correction means, the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes is formed such that a lead-out electrode to the first drive circuit is formed narrower. And a capacitive element. The capacitive element according to claim 1,
In the applied voltage correcting means, the first electrode constituting the pixel closer to the second drive circuit of each of the plurality of second electrodes is formed such that the lead-out electrode to the first drive circuit is formed thinner. Capacitive element characterized by. The capacitive element according to claim 1,
A capacitive element in which the second electrode is a transparent electrode. A plurality of first electrodes provided to extend in parallel with each other;
A functional layer provided to cover the plurality of first electrodes;
A plurality of second electrodes provided on the functional layer so as to extend in parallel with each other at an angle with respect to a direction in which the first electrode extends;
A first drive circuit in which one end of each of the plurality of first electrodes is electrically connected;
A second drive circuit in which one end of each of the plurality of second electrodes is electrically connected;
An inorganic electroluminescence element in which a pixel is formed at each intersection of the first electrode and the second electrode,
The plurality of first electrodes is provided with an applied voltage correcting means so that the voltages applied to the functional layers in the plurality of pixels along each of the plurality of second electrodes are substantially the same. Luminescence element. A plurality of first electrodes provided to extend in parallel with each other;
A functional layer provided to cover the plurality of first electrodes;
A plurality of second electrodes provided on the functional layer so as to extend in parallel with each other at an angle with respect to a direction in which the first electrode extends;
A first drive circuit in which one end of each of the plurality of first electrodes is electrically connected;
A second drive circuit in which one end of each of the plurality of second electrodes is electrically connected;
A pixel is formed at each intersection of the first electrode and the second electrode,
The plurality of first electrodes are provided with applied voltage correcting means so that the voltages applied to the functional layers in the plurality of pixels along each of the plurality of second electrodes are substantially the same. Capacitive display device provided with an element. A plurality of first electrodes provided to extend in parallel with each other;
A functional layer provided to cover the plurality of first electrodes;
A plurality of second electrodes provided on the functional layer so as to extend in parallel with each other at an angle with respect to a direction in which the first electrode extends;
A first drive circuit in which one end of each of the plurality of first electrodes is electrically connected;
A second drive circuit in which one end of each of the plurality of second electrodes is electrically connected;
A pixel is formed at each intersection of the first electrode and the second electrode,
The plurality of first electrodes is provided with an applied voltage correcting means so that the voltages applied to the functional layers in the plurality of pixels along each of the plurality of second electrodes are substantially the same. An inorganic electroluminescence display device comprising a luminescence element.

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