JP2010085866A - Active matrix type display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve high definition of an active matrix type display device by enabling to improve a high aperture rate of a pixel constituted by light emitting elements such as organic EL elements. <P>SOLUTION: The device has upper layer auxiliary wiring 54 (upper part electrode connecting wiring) arranged being adjacent to only an R pixel 20b connected to a cathode electrode (an upper electrode) of an organic EL element 20, and lower layer auxiliary wiring 55 (resistance adjusting wiring) connected to the upper layer auxiliary wiring 54 so as to adjust electric resistance of the cathode electrode. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an active matrix display device that includes a plurality of light emitting elements arranged in a matrix and causes each light emitting element to emit light by a driving means. More specifically, the present invention relates to a technique that enables a high aperture ratio of a pixel formed of a light emitting element and can achieve high definition of an active matrix display device.

  Conventionally, in an active matrix display device, an organic EL display using an organic electroluminescence element (hereinafter referred to as “organic EL element”) as a light emitting element is known. This organic EL display has organic EL elements arranged in a matrix and provided with a driving means for driving the organic EL elements. The organic EL device is a current light emitting device in which an organic material layer in which an organic hole transport layer or an organic light emitting layer is laminated is disposed between an anode electrode and a cathode electrode. Such an organic EL display emits light by injecting electrons and holes into the organic material layer of the organic EL element. Therefore, by controlling the value of the current flowing through the organic EL element by the driving means, it is possible to obtain color gradation.

Here, the organic EL display is provided with signal lines for driving each organic EL element. Furthermore, scanning lines and power supply lines for driving each organic EL element are also wired. Further, auxiliary wiring is disposed between the organic EL elements (see, for example, Patent Document 1).
JP 2006-58815 A

FIG. 6 is a plan view showing a reference example of the wiring structure of the organic EL display 110 having the auxiliary wiring 154 disclosed in Patent Document 1 described above.
As shown in FIG. 6, the organic EL display 110 includes organic EL elements 120 arranged in a matrix of m rows × n columns (in FIG. 6, 2 rows × 3 columns for simplification of the drawing). is there. In the organic EL element 120, a B pixel that emits blue in the three primary colors of light, an R pixel that emits red, and a G pixel that emits green are arranged as a set.

  Here, the organic EL display 110 includes a signal line 151, a scanning line 152, and a power supply line 153 for driving each organic EL element 120. The signal line 151 is wired for each column of the organic EL elements 120, and the scanning line 152 and the power supply line 153 are wired for each row of the organic EL elements 120.

  In addition, an auxiliary wiring 154 is provided on the organic EL display 110. The auxiliary wiring 154 is for adjusting the electrical resistance of the cathode electrode that is the upper electrode of the organic EL element 120. Specifically, the cathode electrode is a transparent electrode so that light emitted from the organic EL element 120 can be extracted outside through the cathode electrode. A conductive material having a high light transmittance that becomes a transparent electrode has a high resistance value. Therefore, in the top emission type organic EL display 110 that extracts light from the upper cathode electrode, the auxiliary wiring 154 is wired in order to reduce the resistance of the cathode electrode. Note that the cathode electrode and the auxiliary wiring 154 are connected via a cathode connection portion 156.

  However, the auxiliary wiring 154 of the organic EL display 110 shown in FIG. 6 (auxiliary wiring disclosed in Patent Document 1) is wired so as to surround each organic EL element 120. The auxiliary wiring 154 is always arranged between the elements 120. For this reason, the aperture ratio of the pixel constituted by the organic EL element 120 is limited by the arrangement space of the auxiliary wiring 154, and there is a problem in increasing the definition of the organic EL display 110.

  Therefore, the problem to be solved by the present invention is to enable a high aperture ratio of a pixel constituted by a light emitting element such as an organic EL element, and to achieve a high definition of an active matrix display device. That is.

The present invention solves the above-described problems by the following means.
The invention according to claim 1 of the present invention includes a plurality of light emitting elements arranged in a matrix and having a light emitting layer between an upper electrode and a lower electrode, and a driving means for driving each of the light emitting elements, An upper electrode connection wiring connected to the upper electrode and provided in the same layer as the lower electrode and disposed adjacent to only some of the light emitting elements, and the upper electrode for adjusting the electric resistance of the upper electrode It is an active matrix type display device having a resistance adjustment wiring that is connected to the electrode connection wiring and is wired below the lower electrode.

(Function)
According to the first aspect of the present invention, the upper electrode connection wiring connected to the upper electrode of the light emitting element and provided in the same layer as the lower electrode, and the upper electrode connection wiring for adjusting the electric resistance of the upper electrode, And a resistance adjustment wiring that is connected to a lower layer than the lower electrode. The upper electrode connection wiring is disposed adjacent to only some of the light emitting elements. For this reason, in the light emitting element in which the upper electrode connection wiring is not disposed adjacent to the light emitting element, it is not necessary to provide a space for arranging the upper electrode connection wiring, so that the aperture ratio of the pixel can be increased. Further, the electric resistance of the upper electrode can be adjusted by resistance adjustment wiring.

  According to the above-described invention, it is possible to increase the aperture ratio of a pixel configured by a light emitting element in which the upper electrode connection wiring is not disposed adjacently. Therefore, high definition of the active matrix display device can be achieved.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a plan view showing a wiring structure of an organic EL display 10 which is an example (first embodiment) of an active matrix display device of the present invention.
As shown in FIG. 1, in the organic EL display 10 of the first embodiment, the organic EL element 20 (corresponding to the light emitting element in the present invention) has M rows × N columns (in FIG. 1, for simplification of the drawing). (2 rows × 3 columns). The organic EL element 20 includes a B pixel 20a that emits blue in the three primary colors of light, an R pixel 20b that emits red, and a G pixel 20c that emits green.

  Further, the organic EL display 10 includes a lower layer auxiliary wiring for adjusting the electric resistance of an upper electrode (not shown) common to each organic EL element 20 (each B pixel 20a, each R pixel 20b, each G pixel 20c). 55 (corresponding to the resistance adjustment wiring in the present invention). Furthermore, a signal line 51 for driving each organic EL element 20 (corresponding to the second wiring in the present invention), a scanning line 52 (corresponding to the first wiring in the present invention), and a power supply line 53 are provided. Have. Further, an upper auxiliary wiring 54 (corresponding to the upper electrode connection wiring in the present invention) is disposed adjacent to each R pixel 20b.

  Here, the scanning line 52, the power supply line 53, and the lower layer auxiliary wiring 55 are respectively provided in the same layer below the lower electrode (not shown) of the organic EL element 20. Also, these are directions parallel to each other, and are wired for each row of the organic EL elements 20. Furthermore, the signal line 51 is provided in the same layer as the scanning line 52, the power supply line 53, and the lower layer auxiliary wiring 55. However, the signal line 51 is arranged in a direction intersecting with these and is provided for each column of the organic EL elements 20. Has been.

  On the other hand, the upper layer auxiliary wiring 54 is provided in the same layer as the lower electrode (not shown) of the organic EL element 20 (upper layer than the lower layer auxiliary wiring 55 and the like). And it connects with the upper electrode (not shown) of the organic EL element 20 by the cathode connection part 56, and is connected by the lower layer auxiliary wiring 55 and the vertical connection part 57. FIG.

  Further, the upper layer auxiliary wiring 54 is arranged in an island shape adjacent to only the R pixel 20b of the organic EL element 20 (along the lower side of the rectangular R pixel 20b), and is a part of the B pixel 20a and the G pixel 20c. Is not arranged. Therefore, the B pixel 20a and the G pixel 20c have a pixel opening larger than that of the R pixel 20b because the space of the lower electrode (not shown) is not limited by the upper auxiliary wiring 54.

FIG. 2 is an equivalent circuit diagram of the organic EL display 10 of the first embodiment shown in FIG.
As shown in FIG. 2, the organic EL display 10 includes an organic EL display composed of an anode electrode 21 (corresponding to the lower electrode in the present invention) and a cathode electrode 22 (corresponding to the upper electrode in the present invention). An element 20 is provided. The organic EL element 20 has an organic light emitting layer between the anode electrode 21 and the cathode electrode 22.

  Here, the organic EL display 10 is an active matrix display device in which the TFT circuit elements 30 (30a, 30b) and the capacitors 40, which are driving means of the present invention, are provided for each organic EL element 20. Specifically, the organic EL display 10 has an organic EL element 20 in which the cathode electrode 22 is connected to GND (ground) and the auxiliary wiring 54, a source electrode 32a is connected to the anode electrode 21 of the organic EL element 20, and a drain. The TFT circuit element 30a having the electrode 33a connected to the positive potential power line 53, the source electrode 32b to the gate electrode 31a of the TFT circuit element 30a, the gate electrode 31b to the scanning line 52, and the drain electrode 33b to the signal line 51 The TFT circuit element 30b is connected to each other, and the capacitor 40 is connected between the source electrode 32a of the TFT circuit element 30a and the source electrode 32b of the TFT circuit element 30b.

  In FIG. 2, the upper and lower layers (between the cathode electrode 22 and the upper layer auxiliary wiring 54 via the cathode connection portion 56, between the upper layer auxiliary wiring 54 and the lower layer auxiliary wiring 55 via the upper and lower connection portion 57, the gate electrode The wiring between 31b and the scanning line 52 is indicated by a dotted line. The signal line 51 intersects with the scanning line 52, the power supply line 53, the upper layer auxiliary wiring 54, and the lower layer auxiliary wiring 55, but is divided before and after the intersecting position. Then, the divided signal lines 51 are connected to each other by a lower signal connection line 58 so that the scanning line 52, the power supply line 53, and the lower layer auxiliary wiring 55 and the signal line 51 of the same layer are not short-circuited. .

  In such an organic EL display 10, the TFT circuit element 30a is a drive transistor, and the TFT circuit element 30b is a switching transistor. When a write signal is applied to the scanning line 52 and the potential of the gate electrode 31b of the TFT circuit element 30b is controlled, the signal voltage of the signal line 51 is applied to the gate electrode 31a of the TFT circuit element 30a. At this time, the potential of the gate electrode 31 a is stably held by the capacitor 40 until the next writing signal is applied to the scanning line 52. As a result, a current corresponding to the voltage between the gate electrode 31a and the source electrode 32a of the TFT circuit element 30a flows to the organic EL element 20, and the organic EL element 20 continues to emit light with a luminance corresponding to this current value. It becomes.

  Thus, the organic EL display 10 emits light by controlling the value of the current flowing through the organic EL element 20. Further, the organic EL element 20 is driven by driving the power supply line 53 in a pulse manner (twice times). Then, the threshold voltage, which is the characteristic variation of the TFT circuit element 30a (driving transistor), is corrected by the first pulse, and the application of the write signal and the mobility correction are simultaneously performed by the second pulse. Therefore, the deterioration with time of the organic EL element 20 and the variation in characteristics of the TFT circuit element 30a are suppressed.

3 is a cross-sectional view (aa ′ cross-section, bb ′ cross-section) of the organic EL display 10 of the first embodiment shown in FIG.
As shown in FIG. 3, the organic EL display 10 of the first embodiment shown in FIG. 1 is obtained by laminating an insulating film 13 on a glass substrate 12 including a light shielding metal 11. A lower layer auxiliary wiring 55, a scanning line 52, and a power supply line 53 are wired on the insulating film 13. A TFT circuit element 30 is also formed on the insulating film 13. Furthermore, although not shown in the aa ′ section and the bb ′ section shown in FIG. 3, the signal line 51 (see FIG. 1) is also wired on the insulating film 13. Therefore, the lower layer auxiliary wiring 55, the scanning line 52, the power supply line 53, the signal line 51, and the TFT circuit element 30 are provided in the same layer.

  Here, as shown in FIGS. 1 and 2, the signal line 51 is divided before and after a portion intersecting with the lower layer auxiliary wiring 55, the scanning line 52, and the power supply line 53. Further, at this intersection, as shown in FIG. 3B, a signal connection line 58 is wired on the glass substrate 12. The signal lines 51 separated on the insulating film 13 are connected by a signal connection line 58 on the glass substrate 12. Therefore, the lower layer auxiliary wiring 55, the scanning line 52, and the power supply line 53 and the signal line 51 do not come into contact with each other, and the lower layer auxiliary wiring 55, the scanning line 52, the power supply line 53, and the signal connection line 58 are insulated from each other. 13 is insulated. Therefore, even if the signal line 51, the scanning line 52, and the power supply line 53 are wired in the same layer, a short circuit does not occur.

  A planarizing film 14 is laminated on the insulating film 13. The planarization film 14 not only insulates the signal line 51 (see FIG. 1), the lower layer auxiliary wiring 55, the scanning line 52, the power supply line 53, and the TFT circuit element 30 from each other, but also has an uneven surface on the upper surface thereof. It is a flat surface. An upper auxiliary wiring 54 is disposed on the planarizing film 14 and the organic EL elements 20 (anode electrodes 21) are arranged.

  In the organic EL element 20, as shown in FIG. 3A, an organic layer 23 (corresponding to a light emitting layer in the present invention) is disposed between an anode electrode 21 and a cathode electrode 22. The anode electrode 21 is connected to the TFT circuit element 30, and the periphery of the anode electrode 21 is covered with the opening regulating film 15. The organic material layer 23 is made of an organic material that emits light by recombination of injected electrons and holes, and light emitted from the organic material layer 23 is extracted outside through the cathode electrode 22 that is a transparent electrode.

  Here, the conductive material having a high light transmittance constituting the cathode electrode 22 has a high resistance value. Therefore, in order to adjust the electrical resistance of the cathode electrode 22 and reduce the resistance of the cathode electrode 22, a lower layer auxiliary wiring 55 is provided. Further, an upper layer auxiliary wiring 54 is provided in the same layer as the anode electrode 21 in order to connect the cathode electrode 22 and the lower layer auxiliary wiring 55. Then, the cathode electrode 22 and the upper layer auxiliary wiring 54 are connected through the cathode connection portion 56 (see FIG. 1), and the upper layer auxiliary wiring 54 and the lower layer auxiliary wiring are connected through the upper and lower connection portion 57 (see FIG. 3B). 55 is connected. The upper auxiliary wiring 54 and the lower auxiliary wiring 55 are grounded to GND (see FIG. 2) at the same potential as the cathode electrode 22.

  In order to manufacture the organic EL display 10 (see FIG. 1) having a cross section as shown in FIG. 3 (aa ′ cross section, bb ′ cross section), first, a signal is placed on the glass substrate 12 including the light shielding metal 11. A connection line 58 is formed. That is, the metal layer is patterned on the glass substrate 12 with a high resistance conductive material such as Mo (molybdenum) to form the signal connection line 58. Then, the insulating film 13 is formed so as to cover the glass substrate 12 and the signal connection line 58. The insulating film 13 is formed, for example, by depositing Si3N4 (silicon nitride) or SiO2 (silicon dioxide) by a CVD method (chemical vapor deposition method).

  Next, a metal layer is formed as a wiring pattern on the insulating film 13 to form a lower layer auxiliary wiring 55, a scanning line 52, a power supply line 53, and a signal line 51 (see FIG. 1). A TFT circuit element 30 is also formed on the insulating film 13. The signal line 51 is divided before and after the portion intersecting the lower layer auxiliary wiring 55, the scanning line 52, and the power supply line 53, and the divided end is connected to the signal connection line 58. .

  When the lower auxiliary wiring 55, the scanning line 52, the power supply line 53, and the TFT circuit element 30 are formed in this way, the surface of the insulating film 13 becomes uneven. Therefore, the planarizing film 14 is formed on the insulating film 13 with an inorganic thin film (SOG: Spin on Glass). Thereby, the planarization film 14 is laminated not only on the insulating film 13 but also on the lower layer auxiliary wiring 55, the scanning line 52, the power supply line 53, and the TFT circuit element 30, and there is no unevenness on the surface of the planarization film 14. It becomes a flat surface. The planarizing film 14 is also laminated on the signal line 51 (see FIG. 1).

  Subsequently, the upper auxiliary wiring 54 is patterned on the planarizing film 14 with a low-resistance metal material such as Al (aluminum). Specifically, an island shape adjacent to only the R pixel 20b (along the lower side of the rectangular R pixel 20b) in each of the organic EL elements 20 (B pixel 20a, R pixel 20b, and G pixel 20c) shown in FIG. The upper auxiliary wiring 54 is formed. At this time, the planarizing film 14 is patterned to partially expose the upper surface of the lower layer auxiliary wiring 55. Therefore, the upper and lower connection portions 57 are formed on the exposed upper surface of the lower layer auxiliary wiring 55 simultaneously with the formation of the upper layer auxiliary wiring 54.

  Further, the opening defining film 15 is laminated on the planarizing film 14 and the upper auxiliary wiring 54 so as to cover the periphery of the anode electrode 21. Furthermore, the cathode electrode 22 and the cathode connection portion 56 are formed on the opening defining film 15 with a conductive material having a high light transmittance. Then, the cathode electrode 22 and the upper layer auxiliary wiring 54 are connected via the cathode connection portion 56. Therefore, the cathode electrode 22 is connected to the lower layer auxiliary wiring 55 by the cathode connection part 56, the upper layer auxiliary wiring 54, and the upper and lower connection part 57.

  Thus, in the organic EL display 10 (see FIG. 1), the periphery of the anode electrode 21 is covered with the opening regulating film 15. The opening defining film 15 is open only at the organic layer 23, and light emitted from the organic layer 23 can be extracted from the opening. Specifically, a metal having a high reflectance is used for the anode electrode 21, while the cathode electrode 22 is a transparent electrode made of a conductive material having a high light transmittance. Therefore, the light emitted from the organic layer 23 is extracted from the cathode electrode 22 side opposite to the glass substrate 12. And by using such a top emission system, the aperture ratio of the organic EL element 20 is efficiently ensured.

  Further, the cathode electrode 22 having a high resistance value due to the conductive material having a high light transmittance is connected to the lower layer auxiliary wiring 55 via the upper layer auxiliary wiring 54. Therefore, the electrical resistance of the cathode electrode 22 is adjusted (low resistance) by the lower layer auxiliary wiring 55. As a result, the area of the upper auxiliary wiring 54 arranged in the same layer as the anode electrode 21 can be greatly reduced. In the organic EL display 10 of the first embodiment shown in FIG. It has become.

  Furthermore, as shown in FIG. 1, the island-like upper layer auxiliary wiring 54 is arranged in an island shape adjacent to only the R pixel 20b of the organic EL element 20 (along the lower side of the rectangular R pixel 20b). It is not arranged in the B pixel 20a and G pixel 20c portions. Therefore, since the area of the anode electrode 21 (see FIG. 3A) of the B pixel 20a and the G pixel 20c can be enlarged, each aperture ratio of the B pixel 20a and the G pixel 20c is larger than the aperture ratio of the R pixel 20b. Is formed.

  Further, when the aperture ratio of the pixel decreases, the lifetime of the pixel decreases. However, the B pixel 20a and the G pixel 20c can have a long lifetime by increasing the aperture ratio. On the other hand, the aperture ratio of the R pixel 20 b is not increased due to the arrangement of the upper layer auxiliary wiring 54. However, since the life of the R pixel 20b is generally longer than that of the B pixel 20a and the G pixel 20c, the entire organic EL element 20 has a long life and is balanced. In other words, in the organic EL display 10 of the first embodiment, the upper auxiliary wiring 54 is disposed adjacent to only the R pixel 20b having a longer lifetime than the B pixel 20a and the G pixel 20c. Therefore, the lifetime of the organic EL element 20 can be increased and the aperture ratio can be increased.

FIG. 4 is a plan view showing a wiring structure of the organic EL display 60 of the second embodiment.
As shown in FIG. 4, in the organic EL display 60 of the second embodiment, the organic EL elements 20 are arranged in a matrix of M rows × N columns (in FIG. 4, 2 rows × 3 columns for simplification of the drawing). It is arranged. In order to adjust the electrical resistance of the cathode electrode 22 (see FIG. 3) of the organic EL element 20, the cathode electrode 22 and the upper layer auxiliary wiring 54 are connected by the cathode connection portion 56, and the upper layer auxiliary wiring 54 and the lower layer auxiliary wiring are connected. 55 is connected to the upper / lower connecting portion 57.

  Here, the organic EL element 20 includes a B pixel 20a that emits blue in the three primary colors of light, an R pixel 20b and an R pixel 20d that emit red, and a G pixel 20c that emits green. The upper auxiliary wiring 54 is arranged in an island shape adjacent to only the R pixel 20b and the R pixel 20b in the R pixel 20d (along the lower side of the square R pixel 20b) arranged alternately every other in the upper and lower sides. However, they are not arranged in the R pixel 20d, B pixel 20a, and G pixel 20c portions.

  Therefore, in the organic EL display 60 of the second embodiment, the aperture ratio of the R pixel 20d, the B pixel 20a, and the G pixel 20c in which the space of the anode electrode 21 (see FIG. 3) is not limited by the upper auxiliary wiring 54 is R pixel 20b. Is bigger than. Thereby, the organic EL display 60 of the second embodiment shown in FIG. 4 can obtain a higher aperture ratio than the organic EL display 10 of the first embodiment shown in FIG. 1 by the number of R pixels 20d. As a result, the organic EL display 60 of the second embodiment achieves higher definition and higher image quality.

FIG. 5 is a plan view showing a wiring structure of the organic EL display 70 of the third embodiment.
As shown in FIG. 5, in the organic EL display 70 of the third embodiment, the organic EL elements 20 are arranged in a matrix of M rows × N columns (in FIG. 4, 2 rows × 3 columns for simplification of the drawing). It is arranged. In order to adjust the electrical resistance of the cathode electrode 22 (see FIG. 3) of the organic EL element 20, the cathode electrode 22 and the upper layer auxiliary wiring 54 are connected by the cathode connection portion 56, and the upper layer auxiliary wiring 54 and the lower layer auxiliary wiring are connected. 55 is connected to the upper / lower connecting portion 57.

  Here, the organic EL element 20 includes a B pixel 20a that emits blue in the three primary colors of light, an R pixel 20e that emits red, and a G pixel 20c that emits green. The upper layer auxiliary wiring 54 is arranged in an island shape adjacent to only the R pixel 20e (along the notch formed in the lower left portion of the R pixel 20e), and is a part of the B pixel 20a and the G pixel 20c. Is not arranged.

  Therefore, in the organic EL display 70 of the third embodiment, the aperture ratios of the B pixel 20a and the G pixel 20c in which the space of the anode electrode 21 (see FIG. 3) is not limited by the upper auxiliary wiring 54 are larger than those of the R pixel 20e. Yes. Further, since the upper auxiliary wiring 54 is disposed only in the lower left portion of the R pixel 20e, the R pixel 20e aperture ratio is larger than that of the R pixel 20b of the organic EL display 10 of the first embodiment shown in FIG. ing. As a result, the organic EL display 70 of the third embodiment shown in FIG. 5 can obtain a higher aperture ratio than the organic EL display 10 of the first embodiment shown in FIG. It has become.

As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, For example, the following various deformation | transformation are possible.
(1) In each embodiment, the top emission type organic EL display 10 in which light emitted from the organic EL element 20 is extracted from the side opposite to the glass substrate 12 is used. However, the present invention can also be applied to a bottom emission method in which light emitted from the organic EL element 20 is extracted from the same side as the glass substrate 12.

  (2) In each embodiment, the organic EL element 20 (organic electroluminescence element) is used as the light emitting element. However, any light-emitting element that can form a light-emitting layer between the upper electrode and the lower electrode, such as an inorganic electroluminescent element or a light-emitting diode, may be used, and the present invention is not limited to an organic electroluminescent element.

It is a top view which shows the wiring structure of the organic electroluminescent display which is an example (1st Embodiment) of the active matrix type display apparatus of this invention. FIG. 2 is an equivalent circuit diagram of the organic EL display according to the first embodiment shown in FIG. 1. It is sectional drawing (a-a 'cross section, b-b' cross section) of the organic electroluminescent display of 1st Embodiment shown in FIG. It is a top view which shows the wiring structure of the organic electroluminescent display of 2nd Embodiment. It is a top view which shows the wiring structure of the organic electroluminescent display of 3rd Embodiment. It is a top view which shows the reference example of the wiring structure of the organic electroluminescent display which has auxiliary wiring.

Explanation of symbols

10, 60, 70 Organic EL display (active matrix display)
20 Organic EL device (light emitting device)
20a B pixel 20b R pixel 20c G pixel 20d R pixel 20e R pixel 21 Anode electrode (lower electrode)
22 Cathode electrode (upper electrode)
23 Organic layer (light emitting layer)
30, 30a, 30b TFT circuit element (driving means)
51 Signal line (second wiring)
52 Scanning line (first wiring)
53 Power line 54 Upper layer auxiliary wiring (upper electrode connection wiring)
55 Lower layer auxiliary wiring (resistance adjustment wiring)

Claims (5)

A plurality of light emitting elements arranged in a matrix and having a light emitting layer between an upper electrode and a lower electrode;
Driving means for driving each of the light emitting elements;
Connected to the upper electrode, provided in the same layer as the lower electrode and disposed adjacent to only some of the light emitting elements,
An active matrix type display device comprising: a resistance adjustment wiring which is connected to the upper electrode connection wiring and is wired below the lower electrode in order to adjust an electric resistance of the upper electrode. The active matrix display device according to claim 1,
The light emitting element includes an R pixel that emits red in the three primary colors of light, a G pixel that emits green, and a B pixel that emits blue.
The upper electrode connection wiring is disposed adjacent to the R pixel,
The active matrix display device, wherein each of the aperture ratios of the G pixel and the B pixel is larger than the aperture ratio of the R pixel. The active matrix display device according to claim 1,
The light emitting element is an organic electroluminescence element in which an organic material layer is disposed. The active matrix display device according to claim 1,
A power line connected to the driving means, provided in the same layer as the resistance adjustment wiring and wired in a direction parallel to the resistance adjustment wiring;
A first wiring connected to the driving means, provided in the same layer as the resistance adjustment wiring, and wired in a direction parallel to the resistance adjustment wiring and the power supply line;
An active matrix type display connected to the driving means and provided in the same layer as the resistance adjustment wiring and having the resistance adjustment wiring, the power supply line, and a second wiring wired in a direction intersecting the first wiring apparatus. The active matrix display device according to claim 4,
The first wiring is a scanning line wired for each row of the light emitting elements arranged in a matrix,
The active matrix display device, wherein the second wiring is a signal line wired for each column of the light emitting elements arranged in a matrix.

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