JP2009176457A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device of such a layout that can well prevent voltage fall of an upper electrode of an organic electroluminescent element by the connection to auxiliary wirings, while improving the aperture ratio of pixel openings. <P>SOLUTION: Of the display device 1 provided with a substrate 3 with substantially a rectangular display area 3a set, a plurality of organic electroluminescent elements each made by pinching an organic layer between a lower electrode and the upper electrode and are arranged inside the display area 3a, and an auxiliary wiring made of the same layer with the lower electrode and wired between each two lower electrodes, in a state of being connected to the upper electrode, a long-side direction of substantially rectangular pixel openings "a" in which each organic electroluminescent element is arrayed is in conformity with that x of the display area 3a. Furthermore, among the auxiliary wirings, a wiring width of a wiring part set in extension in a short-side direction y of the display area 3a is larger than that set in extension in the long-side direction x of the display area 3a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device, and more particularly to an active matrix drive display device including an organic electroluminescent element.

  FIG. 14 shows a layout diagram of a display device (organic EL display device) using an organic electroluminescent element. As shown in this figure, in the organic EL display device, a substantially rectangular display area 3a is set on a substrate 3, and a plurality of pixel openings a are arranged in the display area 3a. Each pixel opening a has a substantially rectangular shape, and is arranged such that the long side direction thereof coincides with the short side direction of the display region 3a. In the organic EL display device, the shape of the pixel opening a matches the shape of the light emitting surface of the organic electroluminescent element EL as it is.

  As shown in FIG. 15, the organic electroluminescence element EL provided in correspondence with each pixel opening a includes a lower electrode (for example, an anode) 5 patterned corresponding to the pixel opening a. The peripheral edge of the lower electrode 5 is covered with an insulating film 7, and an opening provided in the insulating film 7 becomes a pixel opening a. The organic electroluminescent element EL is configured by a portion in which the organic layer 9 and the upper electrode (cathode) 11 are laminated in this order on the lower electrode 5 exposed from the pixel opening a.

  In the active matrix drive display device, a drive circuit (not shown) provided below the lower electrode 5 is connected to each lower electrode 5. The upper electrode 11 is configured as a solid film shared by a plurality of organic electroluminescence elements EL.

  In the display device driven by the active matrix as described above, a so-called top surface light extraction structure (hereinafter referred to as a top surface emission type) that extracts light from the upper electrode 11 side in order to ensure the aperture ratio of the organic electroluminescence element EL. It becomes effective to configure as. For this reason, the upper electrode 11 is required to have a nano-order thin film in order to ensure light transmission. This increases the resistance value and causes a voltage drop, thereby increasing the size and size of the panel. In addition, crosstalk occurs such that the center of the display area 3a becomes dark.

  Thus, power is supplied to the upper electrode 11 from a power supply TCP (Tape Carrier Packag) 13 provided at the four corners of the display area 3a. Further, a configuration has been proposed in which the auxiliary wiring 5a made of the same layer as the lower electrode 5 is provided in a lattice shape in the display region 3a, and the auxiliary wiring 5a is connected to the upper electrode 11, thereby suppressing the occurrence of crosstalk. (See Patent Document 1 below).

JP 2002-318556 A

  Here, it was found that in the display device having the layout configuration described above, current flows concentrated in the short side direction of the display region 3a among the auxiliary wirings 5a provided in a lattice shape in the display region 3a. However, in the display device having the layout configuration described above, the three pixel openings a arranged in the long side direction of the display region 3a are made to correspond to display of red (R), green (G), and blue (B), respectively. One pixel P is configured by setting these R, G, and B sub-pixels as one set. In such a pixel P, the auxiliary wiring 5a arranged between the pixel openings a (that is, between the sub-pixels) in order to ensure the layout with the maximum aperture ratio of the pixel openings a corresponding to the respective colors. Is designed to be approximately the minimum line width.

  For this reason, in the above-described layout, although the current concentrates on the auxiliary wiring 5a extending in the short side direction of the display region 3a, the line width W of the auxiliary wiring 5a in this portion is thin, so that the wiring The resistance is high, and the effect of suppressing crosstalk due to voltage drop could not be obtained sufficiently.

  Accordingly, an object of the present invention is to provide a display device having a layout that can sufficiently prevent a voltage drop of an upper electrode of an organic electroluminescent element by being connected to an auxiliary wiring while improving an aperture ratio of a pixel opening. .

  In order to achieve such an object, a display device according to the present invention includes an organic layer sandwiched between a substrate on which a substantially rectangular display region is set and a lower electrode and an upper electrode, and is arranged in the display region. And a plurality of organic electroluminescent elements formed on the same layer as the lower electrode, and auxiliary wiring wired between the lower electrodes while being connected to the upper electrode. In particular, the long side direction of the substantially rectangular pixel opening in which each organic electroluminescent element is arranged is coincident with the long side direction of the display region.

  In the display device having such a configuration, even when the long side of the substantially rectangular pixel opening (that is, the long side of the lower electrode) is widened outward to widen the pixel opening, The line width of the auxiliary wiring extending in the short side direction is ensured. That is, in order to widen the pixel opening, it is most effective to widen the long side outward rather than widen the short side of the substantially rectangular pixel opening outward. In the configuration of the present invention described above, even when the pixel opening is widened as described above, current flows in the auxiliary wiring extending in the short side direction of the substantially rectangular display screen, that is, the auxiliary wiring. Since the line width of the portion is secured, the effect of preventing the voltage drop of the upper electrode due to the auxiliary wiring is also high.

  As described above, according to the present invention, a display device having a layout capable of sufficiently preventing the voltage drop of the upper electrode of the organic electroluminescent element by connecting to the auxiliary wiring while improving the aperture ratio of the pixel opening is obtained. This makes it possible to effectively prevent the occurrence of crosstalk while realizing high-definition display.

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

<Configuration of display unit>
FIG. 1 is a layout diagram illustrating a schematic configuration of a display device 1 according to an embodiment, and FIG. 2 is an enlarged plan view of a main part. The display device 1 shown in these drawings is an organic EL display device in which organic electroluminescence elements EL are arranged, and is an active matrix drive display device in which a drive circuit is connected to each organic electroluminescence element EL.

  As shown in these drawings, a display area 3 a having a substantially rectangular planar shape is set on a substrate 3 constituting the display device 1. A plurality of pixel openings a are arranged in the display area 3a. Each pixel opening a is characterized in that the planar shape is substantially rectangular and the long side direction thereof is arranged to coincide with the long side direction x of the display region 3a.

  In the pixel opening a, an organic electroluminescence element EL is provided in accordance with the shape of the pixel opening a. Each organic electroluminescent element EL includes a lower electrode 5 that is separately patterned for each pixel opening a. The periphery of each lower electrode 5 is covered with an insulating film 7, and a portion where the lower electrode 5 is exposed from the insulating film 7 becomes a pixel opening a. For this reason, the lower electrode 5 is patterned into a substantially rectangular shape that is slightly larger than the pixel opening a, and the long side direction thereof is arranged to coincide with the long side direction x of the display area 3a. On the lower electrode 5 exposed from the insulating film 7, an organic layer 9 that completely covers the pixel opening a and a solid film-like upper electrode 11 common to the pixel openings a are laminated in this order. Yes. The lower electrode 5 is used as a cathode, for example, and the upper electrode 11 is used as an anode, for example. The portion of the pixel opening a in which the organic layer 9 is sandwiched between the lower electrode 5 and the upper electrode 11 becomes the organic electroluminescent element EL. Therefore, the organic electroluminescent element EL has a substantially rectangular planar shape that is the same as the pixel opening a, and the long side direction thereof is arranged to coincide with the long side direction x of the display region 3a.

  In addition, the drive circuit connected to each organic electroluminescent element EL as described above is provided in a lower layer of the lower electrode 5 while being connected to the lower electrode 5. The configuration of this drive circuit will be described in detail later.

  In the active matrix drive display device 1 in which the drive circuit is provided in the lower layer of the organic electroluminescent element EL, in order to ensure the aperture ratio of the organic electroluminescent element EL, light is extracted from the upper electrode 11 side. It is effective to configure as a top surface light extraction structure (hereinafter referred to as a top surface emission type). For this reason, the lower electrode 5 is made of a light reflective material, and the upper electrode 11 is made of a light transmissive material. When the organic electroluminescent element EL is configured as a resonance structure, the upper electrode 11 is configured of a transflective material.

  Here, when the display device 1 is a display device for color display, the three pixel openings a arranged in the short side direction of the display region 3a are respectively red (R), green (G), and blue (B). Subpixels corresponding to display are used, and one pixel P is configured by combining these R, G, and B subpixels. One pixel P is a so-called square pixel constituted by a substantially square, and a pixel opening a is arranged in each portion obtained by dividing the substantially square into three in one direction. FIG. 2 is an enlarged view of one pixel P portion in which subpixels (pixel openings a) of the three primary colors of RGB are combined.

  However, the one pixel P is not limited to the combination of the three primary colors of RGB subpixels, and one pixel P is configured by adding one or more color subpixels to the three primary color subpixels. It is also possible. More specifically, one pixel P is configured by adding sub-pixels that emit white light (W) to improve luminance, or at least one sub-light that emits complementary color light to expand the color reproduction range. It is also possible to configure one pixel by adding pixels.

  In the organic electroluminescent element EL arranged in each of the R, G, and B sub-pixels as described above, the organic layers 9 having the respective stacked structures may be provided, and these organic layers 9 are adjacent organic layers. 9 and the end edge may overlap each other.

  In the display area 3 a, auxiliary wiring 5 a made of the same layer as the lower electrode 5 is wired in a state of being connected to the upper electrode 11. The auxiliary wiring 5 a is wired in a lattice shape between the lower electrodes 5 while maintaining insulation with respect to the lower electrode 5. Of such auxiliary wiring 5a, a portion wired between pixel openings a arranged adjacent to the long side direction x of the display region 3a, that is, a wiring portion extended in the short side direction y of the display region 3a The line width W1 (hereinafter referred to as the first auxiliary wiring portion 5a-1) is greater than the line width W2 of the wiring portion (hereinafter referred to as the second auxiliary wiring portion 5a-2) extending in the long side direction x. Is also made up of large.

  The ratio of these line widths W1 and W2 is such that [W1 / W2]> [Lx / Ly] where Lx is the size in the long side direction x of the display area 3a and Ly is the size in the short side direction y. It is preferable to have it.

  The first auxiliary wiring portion 5a-1 as described above may be entirely wired between the pixel openings a, but may be wired only to a portion as necessary. On the other hand, the second auxiliary wiring portion 5a-2 may be disposed only between the pixels (square pixels) P, which is a set of three sub-pixels (pixel openings a). As shown in FIG. 3, the second auxiliary wiring portion 5a-2 is disposed adjacent to the short side direction y if the line width W2 is narrower than the line width W1 of the first auxiliary wiring portion 5a-1. It may be wired in all parts between the pixel openings a, and may be arranged only between the necessary pixel openings a. Further, the auxiliary wiring 5a may be composed of only the first auxiliary wiring portion 5a-1.

  The auxiliary wiring 5 a configured as described above is connected to the upper electrode 11 in the connection hole 7 a provided in the insulating film 7. Such a connection hole 7a is preferably provided on the first auxiliary wiring portion 5a-1 having a large line width, and on the intersection of the first auxiliary wiring portion 5a-1 and the second auxiliary wiring portion 5a-2. It may be provided. The connection holes 7a are provided in the first auxiliary wiring portions 5a-1, and the connection holes 7a may be provided at an arrangement interval as needed for one first auxiliary wiring portion 5a-1.

  Further, as shown in FIG. 1, a power supply voltage is supplied to the auxiliary wiring 5a and the upper electrode 11 from a power supply TCP (Tape Carrier Packag) 13 connected to the upper electrode 11 at the four corners of the display region 3a. This is the same as before. The power supply TCP 13 is not limited to the configuration connected to the upper electrode 11 at the four corners of the display area 3a, and may be configured to be connected to the upper electrode 11 at an appropriate position.

<Configuration of drive unit>
FIG. 4 is a diagram showing a configuration of a drive circuit in the display device 1 having the above configuration. FIG. 5 is an enlarged plan view of the main part, and is an enlarged view of three drive circuits C arranged corresponding to one pixel P.

  The drive circuit C shown in these drawings is disposed below the organic electroluminescent element EL described above via an interlayer insulating film, and is connected to the lower electrode (5) of each organic electroluminescent element EL. As shown in these drawings, in the display region 3a on the substrate 3 in the display device 1, a plurality of scanning lines 21 are wired along the long side of the display region 3a, and a plurality of signals are arranged along the short side direction. Line 23 is wired. In addition, one drive circuit C is provided corresponding to the intersection of each scanning line 21 and signal line 23.

  Each drive circuit C includes, for example, a switching thin film transistor Tr1, a drive thin film transistor Tr2, and a storage capacitor Cs. The lower electrode (5), which is the cathode of the organic electroluminescent element EL, is connected to the storage capacitor Cs and the driving thin film transistor Tr2. The driving thin film transistor Tr2 and the storage capacitor Cs are connected to a common power supply line (Vcc) 25. As shown in FIG. 5, the drive circuit having such a configuration includes a first conductive layer 31 provided on the substrate 3, a semiconductor layer not shown here, and an insulating film (not shown) covering them. ) And the second conductive layer 32 provided thereon.

  In addition, a TAB (Tape Automated Bonding) 27 for connecting a scanning line driving circuit (not shown) to the scanning lines 21 and a signal line driving circuit to the signal lines 23 are connected to the periphery of the display area 3a. A TAB 29 is provided.

  When the scanning line 21 is driven, the video signal written from the signal line 23 via the switching thin film transistor Tr1 is held in the holding capacitor Cs, and a current corresponding to the held signal amount is supplied from the driving thin film transistor Tr2. The organic electroluminescence device EL is supplied to the organic electroluminescence device EL, and the organic electroluminescence device EL emits light with a luminance corresponding to the current value.

  The configuration of the pixel circuit as described above is merely an example, and a capacitor element may be provided in the pixel circuit as necessary, or a plurality of thin film transistors may be provided to configure the pixel circuit.

  Here, in particular, the configuration characteristic of the present embodiment is that, in the display portion, three subpixels (pixel openings a) arranged in the short side direction y of the display region 3a are arranged in the long side direction x of the display region 3a. The three arranged drive circuits C are connected correspondingly. That is, the wiring state of the three drive circuits C in the pixel P may be wired as RGB vertical stripes as in the conventional configuration. However, the arrangement state in the pixel P of the organic electroluminescent element EL connected to the driving circuit C is an RGB horizontal stripe rotated by 90 ° with respect to the conventional configuration.

  In order to realize such a configuration, as shown in FIG. 5, the organic electroluminescent element EL with respect to the capacitive element Cs and the driving thin film transistor Tr <b> 2 is disposed between the driving circuits C arranged in one pixel P. It is characteristic that the contact portion 33 is arranged at a position shifted in the short side direction y of the display region 3a.

  FIG. 6 is a cross-sectional view corresponding to the A-A ′ cross section in FIG. 5. FIG. 6 corresponds to the A-A ′ cross section of FIG. 2. As shown in this figure, in the long-side direction x on the substrate 3, three drive circuits C for one pixel P each including a thin film transistor Tr2 and a capacitive element Cs are arranged. These pixel circuits C are configured using the first conductive layer 31 and the second conductive layer 32 as described above. A planarization insulating film 34 is provided so as to cover these drive circuits C, and an organic electroluminescence element EL is provided on the planarization insulating film 34. This organic electroluminescent element EL is provided with a contact portion 33 in a connection hole provided in the planarization insulating film 34, and is connected to one pixel circuit C through the contact portion 33.

  As described above, the organic electroluminescence element EL has a configuration in which the organic layer 9 and the upper electrode 11 are laminated in this order on the exposed surface of the lower electrode 5 whose periphery is covered with the insulating film 7. The opening provided in the insulating film 7 becomes a pixel opening a, which matches the surface shape of the organic electroluminescent element EL. In addition, an auxiliary wiring 5 a composed of the same layer as the lower electrode 5 is disposed beside the lower electrode 5. The insulating film 7 is provided with a connection hole 7a reaching the auxiliary wiring 5a, and the upper electrode 11 common to each organic electroluminescence element EL is connected to the auxiliary wiring 5a through the connection hole 7a. Just as you did.

  As described with reference to FIGS. 1 and 2, each organic electroluminescent element EL provided on the three pixel circuits C constituting one pixel P has a substantially rectangular planar shape that matches the pixel opening a. And the long side direction is made to correspond with the long side direction x of the display area 3a. For this reason, one organic electroluminescence element EL (pixel opening a) is arranged over the three pixel circuits C arranged in the long-side direction x constituting one pixel P. On the other hand, one drive circuit C is arranged over the three organic electroluminescence elements EL (pixel openings a) arranged in the short side direction y constituting one pixel P.

  In such a laminated structure, it is preferable that the channel portions ch of the thin film transistors Tr1 and Tr2 constituting the drive circuit are arranged at positions overlapping the lower electrode 5 or the auxiliary wiring 5a made of a light reflective material. With such a positional relationship, the lower electrode 5 and the auxiliary wiring 5a made of a reflective material serve as a light shielding film for the channel portion ch, and fluctuations in characteristics of the thin film transistors Tr1 and Tr2 due to light irradiation can be suppressed.

  7A and 7B are diagrams showing a configuration example of the thin film transistors Tr1 and Tr2 provided in the above driving circuit, in which FIG. 7A is a plan view and FIG. 7B is a cross-sectional view taken along line A-A 'of the plan view. As shown in these drawings, the thin film transistors Tr1 and Tr2 include a gate electrode 31g made of a first conductive layer 31 provided on the substrate 3. The gate electrode 31g is covered with a gate insulating film 301 (shown only in a sectional view), and a channel portion semiconductor layer 302 is provided on the gate insulating film 301. Further, an insulating stopper layer 303 is provided on the channel semiconductor layer 302 at a position where it is stacked on the gate electrode 31g, and a source / drain composed of an n-type semiconductor layer separated on the stopper layer 303. 304 (shown only in cross-sectional view) is provided. Further, a source / drain electrode 32 sd made of the second conductive layer 32 is provided in a state of being connected to the source / drain 304. The thin film transistors Tr1 and Tr2 having such a configuration are covered with a passivation film 305 (shown only in a sectional view).

  FIG. 8 is a manufacturing process diagram showing a manufacturing procedure of the thin film transistors Tr1 and Tr2 having the above-described configuration, and a manufacturing method of the thin film transistors Tr1 and Tr2 will be described below.

  First, as shown in FIG. 8A, a gate electrode 31g formed by patterning the first conductive layer 31 is formed on the substrate 3. Next, as shown in FIG. 8B, a gate insulating film 301 is formed so as to cover the gate electrode 31g. Thereafter, as shown in FIG. 8 (3), a channel part semiconductor layer 302 is formed on the gate insulating film 301 at a position covering the gate electrode 31. Next, as shown in FIG. 8D, an insulating stopper layer 303 is formed in a pattern on the channel semiconductor layer 302 so as to overlap with the gate electrode 31. Thereafter, as shown in FIG. 8 (5), by patterning the n-type semiconductor layer, the source / drain 304 separated on the stopper layer 303 is formed in a state of being overlaid on the channel portion semiconductor layer 302. Thereafter, as shown in FIG. 8 (5), a source / drain electrode 32sd formed by patterning the second conductive layer 32 is formed in a state of being connected to the source / drain 304 to obtain thin film transistors Tr1 and Tr2. After the above, a passivation film formation 305 is formed so as to cover the thin film transistors Tr1 and Tr2 as shown in FIG.

  According to the display device 1 having the configuration described above, even when the long side of the substantially rectangular pixel opening a (that is, the long side of the lower electrode 5) is widened outward in order to widen the pixel opening a, the The line width W1 of the first auxiliary wiring portion 5a-1 extending in the short side direction of the rectangular display screen 3a can be ensured. That is, in order to widen the pixel opening a, it is most effective to widen the long side outward rather than widening the short side of the substantially rectangular pixel opening a (lower electrode 5). For this reason, in the configuration of the present embodiment in which the long side direction of the pixel opening a coincides with the long side direction x of the display area 3a, even when the pixel opening a is effectively widened in this way, The first auxiliary wiring portion 5a-1 extending in the short-side direction y of the substantially rectangular display screen 3a, that is, the line width W1 of the portion of the auxiliary wiring 5a in which current flows can be ensured. For this reason, it is possible to obtain a high effect of preventing the voltage drop of the upper electrode 11 due to the auxiliary wiring 5a. In the display region 3a, it is clear by the inventors of the present application that current concentrates on the first auxiliary wiring portion 5a-1 extending in the short side direction y of the display region 3a.

  In such a configuration, when the ratio of the auxiliary wiring line widths W1 and W2 is Lx in the long side direction x of the display area 3a and Ly in the short side direction y is [W1 / W2 ]> [Lx / Ly] As described above, the auxiliary wiring 5a is thinner than the line width W1 in the direction in which the current concentrates and flows, and the line width in the direction in which the current hardly flows is thinned. It is possible to further improve the aperture ratio.

  In addition, by securing the line width W1 of the first auxiliary wiring portion 5a-1 through which current flows in the auxiliary wiring 5a in a concentrated manner, the second auxiliary wiring portion 5a extending in the long side direction x of the display region 3a. The number of -2 arrangements can be reduced. Further, by adopting a configuration in which the number of second auxiliary wiring portions 5a-2 arranged is reduced as much as possible, it is possible to further widen the long side of the pixel opening a to improve the aperture ratio.

  As a result, it is possible to sufficiently prevent the voltage drop of the upper electrode 11 of the organic electroluminescent element EL by the connection with the auxiliary wiring 5a while improving the aperture ratio of the pixel opening a, and a high-definition display. It is possible to effectively prevent the occurrence of crosstalk while realizing the above.

  Further, since the wiring state of the drive circuit C arranged corresponding to each pixel opening a is wired as RGB vertical stripes as in the conventional configuration, the circuit design of the entire display device 1 including the drive circuit C is changed. There is no need, and there is no special effort and cost associated with the design change.

<Application example>
Display devices obtained by the manufacturing method according to the present invention described above include various electronic devices shown in FIGS. 9 to 13, such as digital cameras, notebook personal computers, portable terminal devices such as mobile phones, video cameras, etc. The present invention can be applied to display devices of electronic devices in various fields that display video signals input to electronic devices or video signals generated in electronic devices as images or videos. An example of an electronic device to which the present invention is applied will be described below.

  FIG. 9 is a perspective view showing a television to which the present invention is applied. The television according to this application example includes a video display screen unit 101 including a front panel 102, a filter glass 103, and the like, and is created by using the display device according to the present invention as the video display screen unit 101.

  10A and 10B are diagrams showing a digital camera to which the present invention is applied. FIG. 10A is a perspective view seen from the front side, and FIG. 10B is a perspective view seen from the back side. The digital camera according to this application example includes a light emitting unit 111 for flash, a display unit 112, a menu switch 113, a shutter button 114, and the like, and is manufactured by using the display device according to the present invention as the display unit 112.

  FIG. 11 is a perspective view showing a notebook personal computer to which the present invention is applied. A notebook personal computer according to this application example includes a main body 121 including a keyboard 122 that is operated when characters and the like are input, a display unit 123 that displays an image, and the like. It is produced by using.

  FIG. 12 is a perspective view showing a video camera to which the present invention is applied. The video camera according to this application example includes a main body 131, a lens 132 for shooting an object on a side facing forward, a start / stop switch 133 at the time of shooting, a display unit 134, and the like. It is manufactured by using such a display device.

  FIG. 13 is a diagram showing a portable terminal device to which the present invention is applied, for example, a cellular phone, in which (A) is a front view in an opened state, (B) is a side view thereof, and (C) is in a closed state. (D) is a left side view, (E) is a right side view, (F) is a top view, and (G) is a bottom view. The mobile phone according to this application example includes an upper housing 141, a lower housing 142, a connecting portion (here, a hinge portion) 143, a display 144, a sub display 145, a picture light 146, a camera 147, and the like. And the sub display 145 is manufactured by using the display device according to the present invention.

It is a layout figure of the display device of an embodiment. It is a principal part enlarged plan view explaining the display apparatus of embodiment. It is a principal part enlarged plan view explaining the other example of the display apparatus of embodiment. It is a figure which shows the structure of the drive circuit of the display apparatus of embodiment. It is a layout diagram of a drive circuit in the display device of the embodiment. FIG. 6 is a cross-sectional view corresponding to the A-A ′ cross section of FIGS. 2 and 5. It is a figure which shows the structural example of the thin-film transistor provided in a drive circuit. It is a manufacturing process figure which shows the preparation procedures of a thin-film transistor. 305 It is a perspective view which shows the television to which this invention is applied. It is a figure which shows the digital camera to which this invention is applied, (A) is the perspective view seen from the front side, (B) is the perspective view seen from the back side. 1 is a perspective view showing a notebook personal computer to which the present invention is applied. It is a perspective view which shows the video camera to which this invention is applied. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the portable terminal device to which this invention is applied, for example, a mobile telephone, (A) is the front view in the open state, (B) is the side view, (C) is the front view in the closed state , (D) is a left side view, (E) is a right side view, (F) is a top view, and (G) is a bottom view. It is a layout diagram of a conventional display device. It is a principal part enlarged plan view explaining the conventional display apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Display apparatus, 3 ... Board | substrate, 3a ... Display area, 5 ... Lower electrode, 5a ... Auxiliary wiring, 5a-1 ... 1st auxiliary wiring part, 5a-2 ... 2nd auxiliary wiring part, 9 ... Organic layer, 21 DESCRIPTION OF SYMBOLS ... Scanning line, 23 ... Signal line, 11 ... Upper electrode, a ... Pixel opening, C ... Drive circuit, EL ... Organic electroluminescent element, W1 ... Wiring width (first auxiliary wiring portion), W2 ... Wiring width (second) Auxiliary wiring portion), x ... long side direction (display area), y ... short side direction (display area), P ... pixel

Claims (7)

A substrate having a substantially rectangular display area;
A plurality of organic electroluminescent elements arranged in the display region and having an organic layer between a lower electrode and an upper electrode;
In the display device comprising the same layer as the lower electrode and an auxiliary wiring connected to the upper electrode,
A display device, wherein a long side direction of a substantially rectangular pixel opening in which each organic electroluminescence element is arranged coincides with a long side direction of the display region. The display device according to claim 1,
Of the auxiliary wiring, the wiring width of the wiring portion extending in the short side direction of the display region is larger than the wiring width of the wiring portion extending in the long side direction of the display region. Display device. The display device according to claim 2, wherein
Of the auxiliary wiring, a wiring portion extending in the long side direction of the display area is arranged for each pixel including a plurality of pixel openings arranged in the short side direction of the display area. A display device characterized by that. The display device according to claim 1,
The auxiliary wiring extends only in the short side direction of the display area in the display area. The display device according to claim 1,
Of the auxiliary wiring, a wiring portion extending in the short side direction of the display region is disposed between the pixel openings. The display device according to claim 1,
A drive circuit connected to each of the organic electroluminescent elements,
A plurality of pixel circuits arranged in the long side direction of the display region are connected to a plurality of organic electroluminescence elements arranged in the short side direction of the display region, respectively, to constitute one pixel. Display device. The display device according to claim 6, wherein
The display device, wherein the plurality of driving circuits constituting the one pixel are connected to one scanning line wired in the long side direction of the display region.

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