WO2025047546A1 - Light-emitting device and display apparatus - Google Patents

Abstract

This light-emitting device comprises: a first normal light-emitting element and a first drive line for driving the first normal light-emitting element; a second normal light-emitting element and a second drive line for driving the second normal light-emitting element; and an auxiliary light-emitting element and a third drive line for driving the auxiliary light-emitting element. The third drive line is located between the first drive line and the second drive line, and is connected in a state of overlapping in plan view with an auxiliary connection electrode connected to the auxiliary light-emitting element. The auxiliary connection electrode has a first drive line-side eccentrically located part that is eccentrically located on the first drive line side, and a second drive line-side eccentrically located part that is eccentrically located on the second drive line side. The auxiliary light-emitting element is connected to the first drive line-side eccentrically located part if the first normal light-emitting element is unusable, and is connected to the second drive line-side eccentrically located part if the second normal light-emitting element is unusable.

Description

Light emitting device and display device

This disclosure relates to a light-emitting device and a display device equipped with self-luminous elements such as light-emitting diode elements.

　A display device as described in Patent Document 1 is known.

JP 2019-040192 A

The light emitting device according to the present disclosure includes a first regular light emitting element for constant use, a first drive line for driving the first regular light emitting element, a second regular light emitting element for constant use, a second drive line for driving the second regular light emitting element, the second drive line extending along the first drive line, a spare light emitting element for redundant use, and a third drive line for driving the spare light emitting element, the third drive line being located between the first drive line and the second drive line and extending along the first drive line and the second drive line. The third drive line is connected to a spare connection electrode connected to the spare light emitting element in a state where it overlaps with the spare connection electrode in a planar view. The spare connection electrode has a first drive line side unevenly distributed portion that is unevenly distributed on the side of the first drive line and a second drive line side unevenly distributed portion that is unevenly distributed on the side of the second drive line. The spare light emitting element is connected to the first drive line side unevenly distributed portion when the first regular light emitting element is unavailable, and is connected to the second drive line side unevenly distributed portion when the second regular light emitting element is unavailable.

The display device according to the present disclosure includes the above-mentioned light-emitting device, and a light-emitting element group including the first regular light-emitting element, the second regular light-emitting element, and the spare light-emitting element is arranged in a matrix.

The objects, features and advantages of the present disclosure will become more apparent from the following detailed description and drawings.
FIG. 1 is a block diagram showing a display device according to an embodiment of the present disclosure. 1 is a front view showing a light emitting device according to an embodiment of the present disclosure. FIG. 3 is a partially enlarged front view showing a portion III in FIG. 2 . 1 is a partially enlarged front view showing a light emitting device in which all regular light emitting elements can be used. 11 is a partially enlarged front view showing a light emitting device in which some regular light emitting elements are unusable and spare light emitting elements are mounted; FIG. FIG. 2 is a circuit diagram showing an example of a pixel circuit. FIG. 11 is a circuit diagram showing another example of a pixel circuit. FIG. 13 is a circuit diagram showing yet another example of a pixel circuit. FIG. 3 is a partially enlarged front view showing an example of part VIII in FIG. 2 . FIG. 8 is a partially enlarged front view showing another example of part VIII in FIG. 2 . 4 is a flowchart illustrating the operation of the display device of FIG. 1 . 1 is a partially enlarged front view showing a light emitting device in which all regular light emitting elements can be used. 12 is a timing chart showing an example of a method of inputting a drive signal to the light emitting device of FIG. 11. 12 is a timing chart showing another example of a method for inputting a drive signal to the light emitting device of FIG. 11. 1 is a partially enlarged front view showing an example of a light emitting device in which some regular light emitting elements are unusable; 15 is a partially enlarged front view showing a state in which a spare light emitting element is mounted on the light emitting device of FIG. 14. 16 is a timing chart showing an example of a method of inputting a drive signal to the light emitting device of FIG. 15 . 16 is a timing chart showing another example of a method for inputting a drive signal to the light emitting device of FIG. 15 . 13 is a partially enlarged front view showing another example of a light emitting device in which some of the regular light emitting elements are unusable. FIG. 19 is a partially enlarged front view showing a state in which a spare light emitting element is mounted on the light emitting device of FIG. 18. 20 is a timing chart showing an example of a method of inputting a drive signal to the light emitting device of FIG. 19. 20 is a timing chart showing another example of a method for inputting a drive signal to the light emitting device of FIG. 19. 13 is a partially enlarged front view showing yet another example of a light emitting device in which some of the regular light emitting elements are unusable. FIG. 23 is a partially enlarged front view showing a state in which a spare light emitting element is mounted on the light emitting device of FIG. 22. 24 is a timing chart showing an example of a method of inputting a drive signal to the light emitting device of FIG. 23. 24 is a timing chart showing another example of a method for inputting a drive signal to the light emitting device of FIG. 23. 23 is a partially enlarged front view showing another example of a state in which a spare light emitting element is mounted on the light emitting device of FIG. 22. FIG.

Various LED display devices have been proposed, each of which has multiple Light Emitting Diode (LED) elements arranged on a substrate. LED display devices can have point defects such as bright or dark spots due to poor mounting of the LED elements or defects in the LED elements themselves. Patent Document 1 describes a display device that provides two LED elements in one pixel and compensates for point defects by selectively driving the normal LED element of the two.

　Conventional display devices have two LED elements per pixel, and at least one transistor per LED element, making it difficult to narrow the pixel pitch and create a high-definition display device.

Below, embodiments of the light emitting device and display device of the present disclosure will be described with reference to the attached drawings. The light emitting device and display device according to the embodiments of the present disclosure may include well-known components such as a circuit board, wiring conductors, and a control IC (LSI) that are not shown. The figures used in the following description are schematic, and the dimensional ratios and the like in the drawings do not necessarily correspond to the actual ones. In addition, in each figure, corresponding parts are given the same reference numerals, and duplicate descriptions will be omitted or simplified.

FIGS. 1 to 26 are diagrams illustrating the light-emitting device and display device of the present disclosure. In this embodiment, for convenience of explanation, a case where a monochromatic display is performed will be described. Note that the display device may perform color display, in which case the emission color of the first genuine light-emitting element 10a and the emission color of the second genuine light-emitting element 10b may be different. For example, the emission color of the first genuine light-emitting element 10a may be red, the emission color of the second genuine light-emitting element 10b adjacent thereto in the + direction of the first direction (for example, the right direction in FIG. 3) may be green, and the emission color of the first genuine light-emitting element 10a adjacent thereto in the + direction of the first direction may be blue, and this color arrangement may be repeated.

As shown in FIG. 1, the display device 1 of this embodiment includes a light-emitting device 2, a driving unit 3, and a memory unit 4. The driving unit 3 outputs a driving signal to the light-emitting device 2 based on an image data signal supplied from an image data signal source 5. The image data signal source 5 may be realized by an external device that outputs an image data signal. The memory unit 4 stores a program executed by the driving unit 3. The memory unit 4 may be configured by a storage device such as a RAM (Random Access Memory) or a ROM (Read Only Memory).

The light emitting device 2 includes a plurality of light emitting element groups 20g, as shown in Figs. 2 and 3. The plurality of light emitting element groups 20g are arranged in a matrix of M rows and N columns (M and N are integers of 1 or more). Each light emitting element group 20g constitutes two adjacent pixels in the light emitting device 2. As shown in Fig. 3, each light emitting element group 20g includes a first pixel 20a, a second pixel 20b, and a third pixel 20c. The first pixel 20a, the second pixel 20b, and the third pixel 20c are arranged in the row direction (left-right direction in Figs. 2 and 3) of the array (also called pixel array) of the plurality of light emitting element groups 20g. Hereinafter, when the first pixel 20a, the second pixel 20b, and the third pixel 20c are not distinguished from each other, they may be simply referred to as "pixel 20". The row direction of the pixel array may be referred to as the "first direction". The third pixel 20c is located between the first pixel 20a and the second pixel 20b in the first direction.

The first pixel 20a includes a first regular light-emitting element 10a and a first driving line 8a. The first regular light-emitting element 10a may be connected to the first driving line 8a via wiring, a through-hole, etc. The second pixel 20b includes a second regular light-emitting element 10b and a second driving line 8b. The second regular light-emitting element 10b may be connected to the second driving line 8b via wiring, a through-hole, etc. The third pixel 20c includes a third driving line (also called a reserve driving line) 8c. The third pixel 20c may include a reserve light-emitting element 10c. The reserve light-emitting element 10c may be connected to the third driving line 8c via wiring, a through-hole, etc. Hereinafter, when there is no need to distinguish between the first regular light-emitting element 10a and the second regular light-emitting element 10b, they may simply be described as "regular light-emitting elements 10a, 10b". In addition, when there is no need to distinguish between the first regular light-emitting element 10a, the second regular light-emitting element 10b, and the spare light-emitting element 10c, they may simply be referred to as "light-emitting element 10."

The regular light emitting elements 10a and 10b are arranged in a matrix of M rows and N' columns (N' = 2 x N). The regular light emitting elements 10a and 10b are light emitting elements for constant use. The spare light emitting element 10c is a light emitting element for redundant use. The regular light emitting elements 10a and 10b may become unusable due to defects such as poor mounting or defective products. The spare light emitting element 10c is a light emitting element for use in place of the unusable regular light emitting elements 10a and 10b when the regular light emitting elements 10a and 10b are unusable. Each light emitting element group 20g may include one or two spare light emitting elements 10c. Note that when the regular light emitting elements 10a and 10b are usable, the third pixel 20c does not need to include the spare light emitting element 10c. In other words, the spare light emitting element 10c may be mounted only when the regular light emitting elements 10a and 10b are unusable.

The light emitting device 2 may include, for example, about one thousand to one million light emitting elements 10. The light emitting elements 10 may be self-emitting elements such as light emitting diodes (LEDs) and organic light emitting diodes (OLEDs). The light emitting elements 10 may be micro LED elements. In this embodiment, a micro LED element is used as the light emitting element 10. The micro LED element may have a rectangular shape with a side length of about 1 μm to about 100 μm when viewed from a direction perpendicular to its light emitting surface (also called a planar view direction). The first power supply voltage (positive power supply voltage) VDD applied to the anode terminal of the micro LED element may be, for example, about 10 V to 15 V, and the second power supply voltage (negative power supply voltage) VSS applied to the cathode terminal of the micro LED element may be, for example, about -3 V to 0 V.

As shown in Figures 4A and 4B, each light-emitting element group 20g has a first connection electrode 9a connected to the anode terminal of the first regular light-emitting element 10a, a second connection electrode 9b connected to the anode terminal of the second regular light-emitting element 10b, and a third connection electrode (also called a spare connection electrode) 9c connected to the anode terminal of the spare light-emitting element 10c. The first connection electrode 9a, the second connection electrode 9b, and the third connection electrode 9c may be aligned in the first direction. The third connection electrode 9c may be located between the first connection electrode 9a and the second connection electrode 9b. The first connection electrode 9a constitutes a part of the first pixel 20a, the second connection electrode 9b constitutes a part of the second pixel 20b, and the third connection electrode 9c constitutes a part of the third pixel 20c.

Each light emitting element group 20g has a cathode electrode 11 connected to the cathode terminal of the first regular light emitting element 10a, the cathode terminal of the second regular light emitting element 10b, and the cathode terminal of the spare light emitting element 10c. The cathode electrode 11 may be composed of a plurality of strip electrodes as shown in Figures 4A and 4B. The plurality of strip electrodes may have an elongated shape in the first direction. The first regular light emitting element 10a and the spare light emitting element 10c may share one strip electrode. The second regular light emitting element 10b and the spare light emitting element 10c may share one strip electrode.

The first drive line 8a, the second drive line 8b, and the third drive line 8c are wirings for inputting drive signals to each light emitting element group 20g. The first drive line 8a, the second drive line 8b, and the third drive line 8c are wirings for driving the first regular light emitting element 10a, the second regular light emitting element 10b, and the spare light emitting element 10c, respectively. Hereinafter, when there is no need to distinguish between the first drive line 8a, the second drive line 8b, and the third drive line 8c, they may simply be referred to as "drive lines 8". In addition, the first drive line 8a, the second drive line 8b, and the third drive line 8c of each light emitting element group 20g may be referred to as "drive line group 8g".

As shown in Figs. 4A and 4B, the first drive line 8a overlaps with the first connection electrode 9a in a plan view and is connected to the first connection electrode 9a. The first drive line 8a extends in the column direction of the pixel array (the up-down direction in Figs. 4A and 4B). Hereinafter, the column direction of the pixel array may be referred to as the "second direction."

As shown in Figures 4A and 4B, the second drive line 8b overlaps with the second connection electrode 9b in a plan view and is connected to the second connection electrode 9b. The second drive line 8b extends along the first drive line 8a. Note that "extending along" may be interpreted as meaning "extending parallel" or "extending approximately parallel", and the same applies below.

As shown in Figures 4A and 4B, the third driving line 8c overlaps with the spare connection electrode 9c in a plan view and is connected to the spare connection electrode 9c. The third driving line 8c extends along the first driving line 8a and the second driving line 8b. The third driving line 8c is located between the first driving line 8a and the second driving line 8b.

As shown in Figures 3, 4A, and 4B, multiple (M) light-emitting element groups 20g aligned in the second direction share the first drive line 8a, the second drive line 8b, and the third drive line 8c.

The thickness (width and/or thickness) of the third drive line 8c may be the same as or smaller than the thickness of the first drive line 8a and the thickness of the second drive line 8b. As shown in Figures 4A and 4B, when the size (area) of the auxiliary connection electrode 9c connected to the third drive line 8c is larger than the size of the first connection electrode 9a connected to the first drive line 8a and the size of the second connection electrode 9b connected to the second drive line 8b, the effective average width of the entire third drive line 8c increases, and the resistance of the third drive line 8c tends to decrease. In this case, the voltage drop in the second direction of the third drive line 8c tends to be smaller than the voltage drop in the second direction of the first drive line 8a and the voltage drop in the second direction of the second drive line 8b. By making the thickness of the third drive line 8c thinner than the thickness of the first drive line 8a and the thickness of the second drive line 8b, the resistance including the spare connection electrode 9c of the third drive line 8c can be made to be approximately the same as the resistance including the first connection electrode 9a of the first drive line 8a and the resistance including the second connection electrode 9b of the second drive line 8b, and the voltage drop in the third drive line 8c can also be made to be approximately the same. The thickness of the third drive line 8c may be 0.1 times or more and less than 1 times the thickness of the first drive line 8a and the thickness of the second drive line 8b, but is not limited to this range. The resistance including the spare connection electrode 9c of the third drive line 8c may be approximately 0.9 to 1.1 times the resistance including the first connection electrode 9a of the first drive line 8a and the resistance including the second connection electrode 9b of the second drive line 8b, but is not limited to this range.

The size of the spare connection electrode 9c may be at least twice the size of each of the first connection electrode 9a and the second connection electrode 9b. In this case, the size of the first drive line side uneven portion 9ca can be equal to or greater than the size of the first connection electrode 9a, and when the first regular light-emitting element 10a is mounted and connected to the first drive line side uneven portion 9ca, mounting and connection are made easier, improving connectivity. In addition, the size of the second drive line side uneven portion 9cb can be equal to or greater than the size of the second connection electrode 9b, and when the second regular light-emitting element 10b is mounted and connected to the second drive line side uneven portion 9cb, mounting and connection are made easier, improving connectivity. The size of the spare connection electrode 9c may be at least twice but not more than about five times the size of each of the first connection electrode 9a and the second connection electrode 9b, but is not limited to this range.

As shown in Figs. 4A and 4B, the spare connection electrode 9c has a first drive line side biased portion 9ca biased toward the first drive line 8a side, and a second drive line side biased portion 9cb biased toward the second drive line 8b side. The first drive line side biased portion 9ca and the second drive line side biased portion 9cb are connected to each other via a non-biased portion 9cc that overlaps with the third drive line 8c in the spare connection electrode 9c. The first drive line side biased portion 9ca, the second drive line side biased portion 9cb, and the non-biased portion 9cc may be integrally formed. The first drive line side biased portion 9ca is a portion located closer to the first drive line 8a side than the non-biased portion 9cc, and the second drive line side biased portion 9cb is a portion located closer to the second drive line 8b side than the non-biased portion 9cc.

As shown in Figures 4A and 4B, the first connection electrode 9a has a third drive line side biased portion 9ac that is biased toward the third drive line 8c side. The anode terminal of the first regular light-emitting element 10a may be connected to the third drive line side biased portion 9ac of the first connection electrode 9a.

As shown in Figures 4A and 4B, the second connection electrode 9b has a third drive line side biased portion 9bc that is biased toward the third drive line 8c. The anode terminal of the second regular light-emitting element 10b may be connected to the third drive line side biased portion 9bc of the second connection electrode 9b.

As shown in FIG. 4B, when the first regular light-emitting element 10a is unusable, the spare light-emitting element 10c is connected to the first driving line side unevenly distributed portion 9ca, and when the second regular light-emitting element 10b is unusable, it is connected to the second driving line side unevenly distributed portion 9cb. FIG. 4B shows a state in which some of the regular light-emitting elements 10a, 10b are unusable in the light-emitting device 2 of FIG. 4A, and a spare light-emitting element 10c is mounted to be used in place of the unusable regular light-emitting elements 10a, 10b. In FIG. 4B, the unusable regular light-emitting elements 10a, 10b are shown hatched. When both the first regular light-emitting element 10a and the second regular light-emitting element 10b are unusable, the light-emitting device 2 may include a spare light-emitting element 10c connected to either one of the first driving line side unevenly distributed portion 9ca and the second driving line side unevenly distributed portion 9cb, or may include two spare light-emitting elements 10c connected to the first driving line side unevenly distributed portion 9ca and the second driving line side unevenly distributed portion 9cb, respectively. The two preliminary light emitting elements 10c may share one pixel circuit (see Figures 5 to 7) that includes a scanning signal line 7, a third driving line 8c, a writing thin film transistor Tg, a current driving thin film transistor Td, and a capacitance element C.

The light emitting device 2 may be configured such that the spare light emitting element 10c, which is used when the regular light emitting element 10a cannot be used, and the spare light emitting element 10c, which is used when the regular light emitting element 10b cannot be used, share a pixel circuit and do not have their own pixel circuit. In this case, the size of the pixel circuit of each light emitting element group 20g can be reduced, so the pixel pitch can be narrowed and the light emitting device can be made high-definition.

The light emitting device 2 includes a substrate 6, as shown in FIG. 2. The substrate 6 has a first surface (also called a display surface) 6a, a second surface (also called a back surface) 6b opposite the first surface 6a, and a third surface (also called a side surface) 6c connecting the first surface 6a and the second surface 6b. A plurality of light emitting element groups 20g are arranged on the display surface 6a of the substrate 6. The drive unit 3 and the memory unit 4 may be disposed on the back surface 6b of the substrate 6. The substrate 6 may be made of an insulating material, such as a glass material, a resin material, or a ceramic material.

The light emitting device 2 includes a plurality of scanning signal lines 7. The plurality of scanning signal lines 7 are wiring for controlling the timing of writing a drive signal to each light emitting element group 20g via a first drive line 8a, a second drive line 8b, and a third drive line 8c. The plurality of scanning signal lines 7 extend in a first direction. One of the plurality of scanning signal lines 7 is provided for each row of the pixel array. The N light emitting element groups 20g aligned in the first direction share the scanning signal line 7.

The first driving line 8a, the second driving line 8b, the third driving line 8c, and the scanning signal line 7 are connected to the back wiring located on the back surface 6b of the substrate 6. The first driving line 8a, the second driving line 8b, the third driving line 8c, and the scanning signal line 7 may be connected to the back wiring via the side wiring located on the side surface 6c, or may be connected to the back wiring via a through conductor penetrating the substrate 6 from the display surface 6a to the back surface 6b. The back wiring may be connected to a driving element located on the back surface 6b. The driving element constitutes a part of the driving unit 3. The driving element controls the lighting state of each light emitting element group 20g, i.e., the display of the light emitting device 2. The driving element may include a control element such as an IC or an LSI, an electronic element such as a capacitor, a resistor, or a coil, and a wiring conductor that connects the control element and the electronic element. The driving element may be mounted on the back surface 6b by a means such as a COG (Chip On Glass) method. The driving element may be a thin film circuit formed on the back surface 6b by a thin film formation method such as a CVD (Chemical Vapor Deposition) method. The thin film circuit may include a thin film transistor (TFT) having a semiconductor layer made of low temperature polycrystalline silicon (LTPS). The driving element does not have to be located on the back surface 6b. The driving element may be located on an external circuit board (not shown), such as a flexible circuit board. In this case, the back surface wiring may be connected to the external circuit board via a connection terminal located on the back surface 6b. The external circuit board may be mounted on the substrate 6 by a method such as a COF (Chip On Film) method or a TAB (Tape Automated Bonding) method.

As shown in Figs. 4A and 4B, the light emitting device 2 may be configured such that the size of the third connection electrode 9c is larger than the size of either the first connection electrode 9a or the second connection electrode 9b. The "size" may refer to the length in the first direction or the area in a plan view (front view). Since the size of the third connection electrode 9c is larger than the size of the first connection electrode 9a and the second connection electrode 9b, when the first regular light emitting element 10a cannot be used, the preliminary light emitting element 10c can be mounted close to the first regular light emitting element 10a, and when the second regular light emitting element 10b cannot be used, the preliminary light emitting element 10c can be mounted close to the second regular light emitting element 10b. As a result, it is possible to reduce the deterioration of the display quality (e.g., uneven brightness, uneven color, etc.) when the preliminary light emitting element 10c is turned on instead of the regular light emitting elements 10a and 10b. In addition, since the preliminary light emitting element 10c is easily mounted, it is possible to reduce the risk of damaging the regular light emitting elements 10a and 10b that can be used when mounting the preliminary light emitting element 10c.

The light-emitting device 2 may include a plurality of dummy connection electrodes 9d located on the display surface 6a of the substrate 6, as shown in Figures 4A and 4B. Each of the plurality of dummy connection electrodes 9d is located between the first drive line group 8g and the second drive line group 8g adjacent thereto in the first direction. In other words, the dummy connection electrode 9d is located between a connection electrode group consisting of the first connection electrode 9a, the second connection electrode 9b, and the third connection electrode 9c, and another connection electrode group adjacent thereto in the first direction. By including a plurality of dummy connection electrodes 9d, the light-emitting device 2 has connection electrodes (i.e., the first connection electrode 9a, the second connection electrode 9b, the third connection electrode 9c, and the dummy connection electrode 9d) located over substantially the entire area of the display surface 6a, thereby reducing the bias in the arrangement of the connection electrodes on the display surface 6a. As a result, it is possible to suppress deterioration of display quality, such as the appearance of dark lines between the connection electrode groups. In addition, in the manufacturing process of the light-emitting device 2, the bending (deformation) of the substrate 6 when mounting the regular light-emitting elements 10a, 10b and the preliminary light-emitting element 10c on the substrate 6 (the display surface 6a) can be suppressed, so that the regular light-emitting elements 10a, 10b and the preliminary light-emitting element 10c can be mounted accurately and firmly. In addition, during the operation of the light-emitting device 2, heat generated from the light-emitting element 10 can be effectively dissipated to the outside via the connection electrodes.

In the direction in which the first drive line group 8g and the second drive line group 8g are arranged (first direction: row direction), the length of the dummy connection electrode 9d may be the same as the length of the spare connection electrode 9c. In this case, if there is no spare light emitting element 10c in the first direction (row direction), the distance between the first regular light emitting element 10a and the second regular light emitting element 10b can be kept constant, and as a result, high display quality without unevenness can be maintained. Furthermore, the size of the dummy connection electrode 9d may be the same as the size of the spare connection electrode 9c. In this case, high display quality without unevenness can be maintained, and the gap between the connection electrodes on the display surface 6a can be reduced, preventing deterioration of display quality such as dark areas being visible between the connection electrode groups.

The dummy connection electrode 9d may be electrically connected to at least one of the adjacent first connection electrode 9a and second connection electrode 9b by a connection line or the like. In this case, if a connection failure occurs in the first regular light-emitting element 10a mounted and connected to the first connection electrode 9a, a spare light-emitting element 10c may be mounted and connected to the dummy connection electrode 9d in place of the first regular light-emitting element 10a. In other words, the dummy connection electrode 9d can function as another spare connection electrode. In this case, the dummy connection electrode 9d is connected only to the first connection electrode 9a adjacent to it. For example, the dummy connection electrode 9d is connected to both the adjacent first connection electrode 9a and second connection electrode 9b by a connection line, and when a spare light-emitting element 10c in place of the first regular light-emitting element 10a is mounted and connected to the dummy connection electrode 9d, the connection line connecting the dummy connection electrode 9d and the second connection electrode 9b may be cut by laser light or the like. In addition, if a connection failure occurs in the second regular light-emitting element 10b mounted and connected to the second connection electrode 9b, a spare light-emitting element 10c may be mounted and connected to the dummy connection electrode 9d in place of the second regular light-emitting element 10b. In this case, the connection line connecting the dummy connection electrode 9d and the first connection electrode 9a may be cut by laser light or the like.

The first connection electrode 9a, the second connection electrode 9b, the third connection electrode 9c, and the cathode electrode 11 are each electrically connected to a wiring conductor located on the surface or inside of the substrate 6 via a contact 12 such as a through hole (see Figures 4A and 4B).

As shown in Figures 4A and 4B, the first connection electrode 9a has an extension portion 9ab that extends to the opposite side of the third drive line side uneven portion 9ac with respect to the first drive line 8a. This allows for a good connection between the first connection electrode 9a and the first drive line 8a, improving the operational reliability of the light emitting device 2.

As shown in Figures 4A and 4B, the second connection electrode 9b has an extension portion 9ba that extends to the opposite side of the third drive line side uneven portion 9bc with respect to the second drive line 8b. This allows the second connection electrode 9b and the second drive line 8b to be well connected, improving the operational reliability of the light emitting device 2.

When the first regular light-emitting element 10a is disabled and the preliminary light-emitting element 10c is connected to the first drive line side unevenly distributed portion 9ca, the drive signal that should be input to the first regular light-emitting element 10a may be input to the preliminary light-emitting element 10c. In this case, the preliminary light-emitting element 10c can be made to emit light with the luminance that the first regular light-emitting element 10a should emit, and a decrease in the display quality of the light-emitting device 2 can be suppressed.

The preliminary light-emitting element 10c is mounted shifted toward the second regular light-emitting element 10b from the first regular light-emitting element 10a, so if the first regular light-emitting element 10a is caused to emit light at the luminance that it should emit, the display image of the light-emitting device 2 may have luminance unevenness, color unevenness, etc. Therefore, the signal strength (electric potential) of the drive signal input to the preliminary light-emitting element 10c may be equal to or less than the signal strength (electric potential) of the drive signal that should be input to the first regular light-emitting element 10a. In this case, it is possible to suppress a decrease in display quality caused by emitting light from the preliminary light-emitting element 10c mounted at a position different from the position where the first regular light-emitting element 10a is mounted. The signal strength of the drive signal input to the preliminary light-emitting element 10c may be 50% to 100% of the signal strength of the drive signal that should be input to the first regular light-emitting element 10a, but is not limited to this range. Note that "to" means "up to", and the same applies below.

When the second regular light-emitting element 10b is unavailable and the preliminary light-emitting element 10c is connected to the second drive line side unevenly distributed portion 9cb, the drive signal that should be input to the second regular light-emitting element 10b may be input to the preliminary light-emitting element 10c. In this case, the preliminary light-emitting element 10c can be made to emit light with the luminance that the second regular light-emitting element 10b should emit, and a decrease in the display quality of the light-emitting device 2 can be suppressed.

The preliminary light-emitting element 10c is mounted shifted toward the first regular light-emitting element 10a from the second regular light-emitting element 10b, so if the second regular light-emitting element 10b is caused to emit light at the brightness that it should originally emit, uneven brightness, color, etc. may occur in the display image of the light-emitting device 2. Therefore, the signal strength (electric potential) of the drive signal input to the preliminary light-emitting element 10c may be equal to or less than the signal strength (electric potential) of the drive signal that should originally be input to the second regular light-emitting element 10b. In this case, it is possible to suppress a decrease in display quality caused by emitting light from the preliminary light-emitting element 10c mounted at a position different from the position where the second regular light-emitting element 10b is mounted. The signal strength of the drive signal input to the preliminary light-emitting element 10c may be 50% to 100% of the signal strength of the drive signal that should originally be input to the second regular light-emitting element 10b, but is not limited to this range.

The length of the input period of the first drive signal input to the preliminary light-emitting element 10c may be equal to or shorter than the length of the input period of the first drive signal that should be input to the first regular light-emitting element 10a. In this case, it is possible to suppress a decrease in display quality caused by emitting light from the preliminary light-emitting element 10c mounted at a position different from the position at which the first regular light-emitting element 10a is mounted. The length of the input period of the first drive signal input to the preliminary light-emitting element 10c may be 50% to 100% of the length of the input period of the first drive signal that should originally be input to the first regular light-emitting element 10a, but is not limited to this range.

The length of the input period of the second drive signal input to the preliminary light-emitting element 10c may be equal to or shorter than the length of the input period of the second drive signal that should be input to the second regular light-emitting element 10b. In this case, it is possible to suppress a decrease in display quality caused by emitting light from the preliminary light-emitting element 10c mounted at a position different from the position at which the second regular light-emitting element 10b is mounted. The length of the input period of the second drive signal input to the preliminary light-emitting element 10c may be 50% to 100% of the length of the input period of the second drive signal that should originally be input to the second regular light-emitting element 10b, but is not limited to this range.

Next, the circuit configuration of the pixel circuit of the light-emitting element group 20g will be described. The light-emitting element group 20g includes a first pixel 20a, a second pixel 20b, and a third pixel 20c. The first pixel 20a, the second pixel 20b, and the third pixel 20c have substantially the same circuit configuration, so below, the circuit configuration of the pixel circuit of one pixel 20 will be described.

As shown in FIG. 5, the pixel 20 includes a drive line 8, a scanning signal line 7, a light-emitting element 10, a thin film transistor (TFT) Tg (hereinafter referred to as "TFT(Tg)"), a thin film transistor Td (hereinafter referred to as "TFT(Td)"), and a capacitance element C.

The TFT (Tg) is a TFT for writing a drive signal SIG to a pixel node Vg located on a connection line connecting the drain electrode of the TFT (Tg) and the gate electrode of the TFT (Td). The source electrode of the TFT (Tg) is connected to the drive line 8, the gate electrode of the TFT (Tg) is connected to the scanning signal line 7, and the drain electrode of the TFT (Tg) is connected to the gate electrode of the TFT (Td). The scanning signal line 7 is connected to the drive unit 3, and a scanning signal line control signal GATE for switching the TFT (Tg) to a conductive state or a non-conductive state is input to the scanning signal line 7. The TFT (Td) is a TFT for current driving the light emitting element 10 from the potential difference between the first power supply voltage VDD and the second power supply voltage VSS according to the level (voltage) of the drive signal SIG. The first power supply voltage VDD is applied to the source electrode of the TFT (Td). The drain electrode of the TFT (Td) is connected to the anode terminal of the light-emitting element 10. The second power supply voltage VSS is applied to the cathode terminal of the light-emitting element 10. The capacitive element C is located on the connection line connecting the gate electrode of the TFT (Td) and the source electrode of the TFT (Td), and holds the voltage of the drive signal SIG written to the pixel node Vg for the period until the next rewrite (the period of one frame).

FIG. 5 shows a case where the TFT (Tg) and the TFT (Td) are configured as p-channel TFTs, but this is not limited thereto. The TFT (Tg) and the TFT (Td) may be configured as n-channel TFTs as shown in FIG. 6. One of the TFT (Tg) and the TFT (Td) may be an n-channel TFT and the other a p-channel TFT.

As shown in FIG. 7, the pixel 20 may include a thin film transistor Ts (hereinafter referred to as "TFT(Ts)"). The source electrode of the TFT(Ts) is connected to the drain electrode of the TFT(Td), the drain electrode of the TFT(Ts) is connected to the anode terminal of the light-emitting element 10, and the gate electrode of the TFT(Ts) is connected to a light-emitting control signal line 13. The light-emitting control signal line 13 is connected to the driving unit 3. The driving unit 3 can control the light-emitting element 10 by pulse width modulation (PWM) by inputting a light-emitting control signal EMI to the gate electrode of the TFT(Ts) via the light-emitting control signal line 13. This enables gradation control of the light-emitting element 10.

Next, the input of the drive signal SIG to the light emitting element group 20g will be described. The drive signal SIG is a signal generated by the drive unit 3 based on the image data signal supplied from the image data signal source 5, and is input to the light emitting element group 20g via the drive line 8. Hereinafter, as shown in FIG. 8, the drive signal input to the first drive line 8a will be described as SIG_P(n-1), the drive signal input to the second drive line 8b will be described as "SIG_P(n)," and the drive signal input to the third drive line 8c will be described as "SIG_S(n-1)." Furthermore, when there is no need to distinguish between the drive signal SIG_P(n-1), the drive signal SIG_P(n), and the drive signal SIG_S(n-1), they will simply be described as "drive signal SIG."

8 is a partially enlarged front view of part VIII in FIG. 2. As shown in FIG. 8, the light emitting device 2 includes a data line driving circuit 120 and a driving control unit 17. The data line driving circuit 120 and the driving control unit 17 may be part of the driving unit 3. The data line driving circuit 120 outputs driving signals SIG_P(n-1), SIG_P(n) and SIG_S(n-1) based on the usability information of the light emitting element 10 and the image data signal supplied from the image data signal source 5. The usability information of the light emitting element 10 is information on whether the regular light emitting elements 10a and 10b are usable or not, and whether the spare light emitting element 10c is usable or not (whether the spare light emitting element 10c is implemented or not). The usability information of the light emitting element 10 includes the addresses (position information) of the regular light emitting elements 10a and 10b and the spare light emitting element 10c. The usability information of the light emitting element 10 may be stored in the memory unit 4. The drive control unit 17 controls the input of the drive signal SIG to the drive line 8 based on the availability information of the light emitting element 10. FIG. 8 shows the configuration of the drive control unit 17 that drives one frame (also called one horizontal scanning period) in two time series using a selector method (also called a time division method), but the drive method of the drive control unit 17 is not limited to the selector method.

For the light emitting element group 20g in which both the first regular light emitting element 10a and the second regular light emitting element 10b are available, the drive control unit 17 inputs the drive signals SIG_P(n-1) and SIG_P(n), which are lighting signals, to the first drive line 8a and the second drive line 8b, respectively, and inputs the drive signal SIG_S(n-1), which is a non-lighting signal (black display signal), to the third drive line 8c.

For the light emitting element group 20g in which the first regular light emitting element 10a is available and the second regular light emitting element 10b is unavailable, the drive control unit 17 inputs the drive signals SIG_P(n-1) and SIG_S(n-1), which are turn-on signals, to the first drive line 8a and the third drive line 8c, respectively, and inputs the non-lighting signal SIG_P(n) to the second drive line 8b.

For a light-emitting element group in which the first regular light-emitting element 10a is unavailable and the second regular light-emitting element 10b is available, the drive control unit 17 inputs the drive signals SIG_P(n) and SIG_S(n-1), which are turn-on signals, to the second drive line 8b and the third drive line 8c, respectively, and inputs the drive signal SIG_P(n-1), which is a non-light-on signal, to the first drive line 8a.

As shown in FIG. 8, the drive control unit 17 includes a selector circuit 22, a first switch TFT (Tsa), a second switch TFT (Tsb), a third switch TFT (Tsc), a fourth switch TFT (Tsd), and connection lines 22a to 22h, 18a to 18h, 120a, and 120b.

The selector circuit 22 has a first selection signal (SEL1) output section, an inverted first selection signal (XSEL1) output section, a second selection signal (SEL2) output section, an inverted second selection signal (XSEL2) output section, a third selection signal (SEL3) output section, an inverted third selection signal (XSEL3) output section, a fourth selection signal (SEL4) output section, and an inverted fourth selection signal (XSEL4) output section.

The first switch TFT (Tsa) is a transfer gate circuit composed of an n-channel TFT (Ts1) and a p-channel TFT (Ts2). The source electrodes of the TFTs (Ts1) and (Ts2) are commonly connected, and the drain electrodes of the TFTs (Ts1) and (Ts2) are commonly connected. The gate electrode of the TFT (Ts1) is connected to the first selection signal (SEL1) output section via connection lines 22a and 17a, and the gate electrode of the TFT (Ts2) is connected to the inverted first selection signal (XSEL1) output section via connection lines 22b and 17b.

The second switch TFT (Tsb) is a transfer gate circuit composed of an n-channel TFT (Ts3) and a p-channel TFT (Ts4). The source electrodes of the TFTs (Ts3) and (Ts4) are commonly connected, and the drain electrodes of the TFTs (Ts3) and (Ts4) are commonly connected. The gate electrode of the TFT (Ts3) is connected to the second selection signal (SEL3) output section via connection lines 22c and 17c, and the gate electrode of the TFT (Ts4) is connected to the inverted second selection signal (XSEL2) output section via connection lines 22d and 17d.

The third switch TFT (Tsc) is a transfer gate circuit composed of an n-channel TFT (Ts5) and a p-channel TFT (Ts6). The source electrodes of the TFTs (Ts5) and (Ts6) are commonly connected, and the drain electrodes of the TFTs (Ts5) and (Ts6) are commonly connected. The gate electrode of the TFT (Ts5) is connected to the third selection signal (SEL3) output section via connection lines 22e and 17e, and the gate electrode of the TFT (Ts6) is connected to the inverted third selection signal (XSEL3) output section via connection lines 22f and 17f.

The fourth switch TFT (Tsd) is a transfer gate circuit composed of an n-channel TFT (Ts7) and a p-channel TFT (Ts8). The source electrodes of the TFTs (Ts7) and (Ts8) are commonly connected, and the drain electrodes of the TFTs (Ts7) and (Ts8) are commonly connected. The gate electrode of the TFT (Ts7) is connected to the fourth selection signal (SEL4) output section via connection lines 22g and 17g, and the gate electrode of the TFT (Ts8) is connected to the inverted fourth selection signal (XSEL4) output section via connection lines 22h and 17h.

When the selector circuit 22 outputs an H signal (high signal) from the first selection signal (SEL1) output section and an L signal (low signal) from the inverted first selection signal (XSEL1) output section, the H signal output from the first selection signal (SEL1) output section is input to the gate electrode of the TFT (Ts1) via the connection lines 22a and 17a, and the L signal output from the inverted first selection signal (XSEL1) output section is input to the gate electrode of the TFT (Ts2) via the connection lines 22b and 17b. As a result, the first switch TFT (Tsa) is in a conductive state (ON state). When the selector circuit 22 outputs an L signal from the first selection signal (SEL1) output section and an H signal from the inverted first selection signal (XSEL1) output section, the first switch TFT (Tsa) is in a non-conductive state (OFF state).

In the same manner, the selector circuit 22 can switch each of the second switch TFT (Tsb), the third switch TFT (Tsc), and the fourth switch TFT (Tsd) to the ON state or the OFF state. When the selector circuit 22 outputs an H signal from the second selection signal (SEL2) output section and an L signal from the inverted second selection signal (XSEL2) output section, the second switch TFT (Tsb) is in the ON state. When the selector circuit 22 outputs an L signal from the second selection signal (SEL2) output section and an H signal from the inverted second selection signal (XSEL2) output section, the second switch TFT (Tsb) is in the OFF state. When the selector circuit 22 outputs an H signal from the third selection signal (SEL3) output section and an L signal from the inverted third selection signal (XSEL3) output section, the third switch TFT (Tsc) is in the ON state. When the selector circuit 22 outputs an L signal from the third selection signal (SEL3) output section and an H signal from the inverted third selection signal (XSEL3) output section, the third switch TFT (Tsc) is in the OFF state. When the selector circuit 22 outputs an H signal from the fourth selection signal (SEL4) output section and an L signal from the inverted fourth selection signal (XSEL4) output section, the fourth switch TFT (Tsd) is in the ON state. When the selector circuit 22 outputs an L signal from the fourth selection signal (SEL4) output section and an H signal from the inverted fourth selection signal (XSEL4) output section, the fourth switch TFT (Tsd) is in the OFF state.

When the first switch TFT (Tsa) is ON and the third switch TFT (Tsc) is OFF, the drive signal SIG_P (n-1) is input to the first switch TFT (Tsa) via the connection line 120a, and the drive signal SIG_P (n-1) is transmitted to the first drive line 8a. When the first switch TFT (Tsa) is OFF and the third switch TFT (Tsc) is ON, the drive signal SIG_S (n-1) is input to the third switch TFT (Tsc) via the connection line 120a, and the drive signal SIG_S (n-1) is transmitted to the third drive line 8c.

When the second switch TFT (Tsb) is in the ON state and the fourth switch TFT (Tsd) is in the OFF state, if the drive signal SIG_P (n) is input to the second switch TFT (Tsb) via the connection line 120b, the second drive signal SIG_P (n) is transmitted to the second drive line 8b. When the second switch TFT (Tsb) is in the OFF state and the fourth switch TFT (Tsc) is in the ON state, if the drive signal SIG_S (n-1) is input to the third switch TFT (Tsd) via the connection line 120b, the drive signal SIG_S (n-1) is transmitted to the third drive line 8c.

The light emitting device 2 does not need to include a drive control unit 17. As shown in FIG. 9, the light emitting device 2 may be configured such that the data line drive circuit 120 directly outputs the drive signal SIG_P(n-1), the drive signal SIG_P(n), and the drive signal SIG_S(n-1) to the first drive line 8a, the second drive line 8b, and the third drive line 8c, respectively.

The light-emitting device 2 includes a gate driver and a source driver. The gate driver and the source driver may be located on the periphery of the display surface 6a of the substrate 6, or on the rear surface 6b of the substrate 6. The gate driver and the source driver may be located on an external circuit board. The gate driver and the source driver may be part of the drive unit 3.

The gate driver selects one or more of the multiple (e.g., tens to thousands) scanning signal lines 7 in line sequence, sets the selected scanning signal lines 7 to the selected potential VGH (VGL), and sets the unselected scanning signal lines 7 to the unselected potential VGL (VGH). The selected potential is VGL if the TFT (Tg) is a p-channel TFT, and is VGH if the TFT (Tg) is an n-channel TFT. When the scanning signal line 7 is set to the selected potential VGH (VGL), the gate electrode of the write TFT (TFT (Tg) shown in Figures 5 to 7) of the pixel 20 connected to the scanning signal line 7 is set to the selected potential VGH (VGL). As a result, the write TFT becomes conductive, and the pixel node Vg is controlled to a potential equal to the potential of the drive signal SIG transmitted through the drive line 8. When the gate driver applies the non-selection potential VGL (VGH) to the scanning signal line 7, the gate electrode of the writing TFT (TFT (Tg) shown in Figures 5 to 7) of the pixel 20 connected to the scanning signal line 7 is set to the non-selection potential VGL (VGH). As a result, the writing TFT becomes non-conductive.

Based on the image data signal input from the image data signal source 5 (see FIG. 1), the source driver sets the potential of SIG_P(n-1) input to the first drive line 8a, the potential of the drive signal SIG_P(n) input to the second drive line 8b, and the potential of the drive signal SIG_S(n-1) input to the third drive line 8c to a data potential corresponding to the row (also called the selected row) of pixels 20 connected to the scanning signal line 7 selected by the gate driver. In this way, a data potential corresponding to the image data signal of the selected row can be written to the multiple pixels 20 in the selected row. Therefore, by selecting one or more of the multiple scanning signal lines 7 in line sequence and writing a data potential corresponding to the image data signal of the selected row to the multiple pixels 20 in the selected row, the light-emitting element 10 can be illuminated with a brightness corresponding to the image data signal.

FIG. 10 is a flowchart explaining the operation of the display device 1. This flowchart is executed by the drive unit 3. First, it is assumed that only regular light-emitting elements 10a and 10b are mounted on the light-emitting device 2, and the spare light-emitting element 10c is not mounted. The light-emitting device 2 is subjected to a lighting inspection before shipping, and pixels 20 in which the regular light-emitting elements 10a and 10b are unusable are identified. The lighting inspection includes checking for dark spots and bright spots.

In dark spot checking, all genuine light emitting elements 10a, 10b are controlled to be lit, and each genuine light emitting element 10a, 10b is checked by optical measurement to see if it has a brightness equal to or higher than a predetermined brightness for dark spot checking. If it has a brightness equal to or higher than the predetermined brightness, it is judged as usable (OK), and if it has a brightness less than the predetermined brightness, it is judged as unusable (NG).

In bright spot confirmation, all genuine light emitting elements 10a, 10b are controlled to be turned off, and each genuine light emitting element 10a, 10b is checked by optical measurement to see if it has a brightness equal to or greater than a predetermined brightness for bright spot confirmation. If it is less than the predetermined brightness, it is judged as usable (OK), and if it is equal to or greater than the predetermined brightness, it is judged as unusable (NG).

A pixel 20 for which the first regular light-emitting element 10a is OK in both the dark spot confirmation and the bright spot confirmation, and the second regular light-emitting element 10b is OK in both the dark spot confirmation and the bright spot confirmation, is judged to be an OK pixel, and the position information (address) of the OK pixel is written to the memory unit 4 by the operator using the input device. A pixel 20 that is NG in the dark spot confirmation or the bright spot confirmation is judged to be an NG pixel, and the information (address) of the NG pixel is written to the memory unit 4 by the operator using the input device. A spare light-emitting element 10c is implemented for use in place of the regular light-emitting elements 10a and 10b for the pixel 20 judged to be an NG pixel.

In [S1], the image data signal input to the light-emitting element 10 is associated with the address of the light-emitting element 10 and input to the memory unit 4. The address identifies each of the multiple regular light-emitting elements 10a, 10b arranged in a matrix of M rows and N' columns by row number m and column number n. Hereinafter, the regular light-emitting elements 10a, 10b having the address (m, n) are described as "light-emitting element 10(m, n, p)". In addition, when the light-emitting element 10(m, n, p) is unusable, the spare light-emitting element 10c that is mounted adjacent to the light-emitting element 10(m, n, p) and used instead of the light-emitting element 10(m, n, p) is described as the light-emitting element 10(m, n, s). Furthermore, the pixel including the light-emitting element 10(m, n, p) is described as the "pixel 20(m, n, p)", and the pixel including the light-emitting element 10(m, n, s) is described as the "pixel 20(m, n, s)". Note that "p" indicates that it is the regular light-emitting element 10a or 10b, and "s" indicates that it is the spare light-emitting element 10c. The address (m, n, p) may include information on whether the light-emitting element 10 (m, n, p) is usable (usability information).

In [S2], the usability information of the M×N' light-emitting elements 10 (m, n, p) stored in the memory unit 4 is referenced.

In [S3], it is determined whether or not the light-emitting element 10 (m, n, p) is usable based on the usability information. The light-emitting element 10 (m, n, p) may be the light-emitting element 10 (1, 1, p). If the light-emitting element 10 (m, n, p) is usable [Yes], proceed to [S4], and if the light-emitting element 10 (m, n, p) is not usable [No], proceed to [S5].

In [S4], it is determined whether n is an odd number. If n is an odd number [Yes], proceed to step S6, and if n is not an odd number [No], proceed to step S7. In other words, it is determined whether the light-emitting element 10 (m, n, p) is the light-emitting element 10 connected to the first drive line 8a, and if the light-emitting element 10 (m, n, p) is the light-emitting element 10 connected to the first drive line 8a, proceed to [S6], and if the light-emitting element 10 (m, n, p) is not the light-emitting element 10 connected to the first drive line 8a (i.e., the light-emitting element 10 connected to the second drive line 8b), proceed to [S7].

In [S6], a light-on signal (image signal) is input to pixel 20 (m, n, p) via first drive line 8a, and a non-light-on signal (black signal) is input to pixel 20 (m, n, s) via third drive line 8c. This causes light-emitting element 10 (m, n, p) to light up, while light-emitting element 10 (m, n, s) to be non-lighted. Note that input of the non-light-on signal to third drive line 8c may be omitted.

In [S7], a turn-on signal is input to pixel 20 (m, n, p) via second drive line 8b, and a turn-off signal is input to pixel 20 (m, n, s) via third drive line 8c. This turns on light-emitting element 10 (m, n, p) and turns off light-emitting element 10 (m, n, s). Note that the input of a black signal to third drive line 8c may be omitted.

In [S5], it is determined whether n is an odd number. If n is an odd number [Yes], proceed to [S8], and if n is not an odd number [No], proceed to [S9]. In other words, it is determined whether the light-emitting element 10 (m, n, p) is the light-emitting element 10 connected to the first drive line 8a, and if the light-emitting element 10 (m, n, p) is the light-emitting element 10 connected to the first drive line 8a, proceed to [S8], and if the light-emitting element 10 (m, n, p) is not the light-emitting element 10 connected to the first drive line 8a (i.e., the light-emitting element 10 connected to the second drive line 8b), proceed to [S9].

In [S8], a non-lighting signal is input to pixel 20(m,n,p) via first drive line 8a, and a lighting signal is input to pixel 20(m,n,s) via third drive line 8c. This makes it possible to turn off light-emitting element 10(m,n,p) and turn on light-emitting element 10(m,n,s). Note that if pixel 20(m,n,p) is a dark spot, the input of the non-lighting signal to pixel 20(m,n,p) may be omitted.

In [S9], a non-lighting signal is input to pixel 20(m,n,p) via second drive line 8b, and a lighting signal is input to pixel 20(m,n,s) via third drive line 8c. This makes it possible to turn off light-emitting element 10(m,n,p) and turn on light-emitting element 10(m,n,s). Note that if pixel 20(m,n,p) is a dark spot, the input of the non-lighting signal to pixel 20(m,n,p) may be omitted.

In [S10], it is determined whether m is the maximum value (i.e., the maximum value M of the row number). If m is the maximum value [Yes], proceed to [S12], and if m is not the maximum value [No], proceed to the next row in [S11] (i.e., increase the value of m by 1) and return to [S3].

In [S12], it is determined whether n is the maximum value (i.e., the maximum value of the column number N'). If n is the maximum value [Yes], the flow chart ends, and if n is not the maximum value [No], in [S13], the process moves to the next column (i.e., the value of n is increased by 1) and the process returns to [S3].

In this manner, the driving unit 3 can control the display of the light-emitting device 2.

In the lighting test, the usability of the regular light-emitting elements 10a and 10b may be determined based on whether the emission luminance and emission wavelength are within the desired range when a reference current or reference voltage is input to the regular light-emitting elements 10a and 10b. The reference current may be, for example, the maximum rated current of the regular light-emitting elements 10a and 10b, or the average current in the rated current range of the regular light-emitting elements 10a and 10b. The reference voltage may be, for example, the maximum rated voltage of the regular light-emitting elements 10a and 10b, or the average voltage in the rated voltage range of the regular light-emitting elements 10a and 10b. The same applies to the determination of the usability of the spare light-emitting element 10c.

The usability of the regular light-emitting elements 10a and 10b may be determined based on the operating characteristics of the pixel circuit that drives the regular light-emitting elements 10a and 10b. For example, the usability of the regular light-emitting elements 10a and 10b may be determined based on whether the drain voltage range (minimum drain voltage to maximum drain voltage) of the TFT (Td) is within a desired range with respect to the operating voltage range (minimum operating voltage to maximum operating voltage) of the driving signal SIG_P. Alternatively, the usability of the regular light-emitting elements 10a and 10b may be determined based on whether the minimum drain voltage of the TFT (Td) is within a desired range and whether the maximum drain voltage of the TFT (Td) is within a desired range. Alternatively, the usability of the regular light-emitting elements 10a and 10b may be determined based on whether the curve showing the change in the drain voltage of the TFT (Td) relative to the change in the driving signal SIG_P is a desired curve or a curve close to the desired curve.

Next, a method of inputting the drive signal SIG to the light emitting device 2 will be described. Figure 11 is a partially enlarged front view showing the light emitting device 2 in which all regular light emitting elements 10a, 10b can be used. Figure 12 is a timing chart showing an example of a method of inputting the drive signal SIG to the light emitting device 2 of Figure 11, and Figure 13 is a timing chart showing another example of a method of inputting the drive signal SIG to the light emitting device 2 of Figure 10. In the timing charts of Figures 12 and 13, the period during which a non-lighting signal (black signal) is input to the drive line 8 is indicated by hatching. The same applies to the timing charts described later (see Figures 16, 17, 20, 21, 24, and 25).

FIG. 11 shows a case where all regular light-emitting elements 10a, 10b are usable. The symbol "OK" attached to the regular light-emitting elements 10a, 10b indicates that the regular light-emitting elements 10a, 10b are usable, that is, the pixel 20 including the regular light-emitting elements 10a, 10b is an OK pixel.

First, a case where the driving unit 3 drives one horizontal scanning period in a time division manner will be described. As shown in FIG. 12, in the first half of one horizontal scanning period 1H(m-1), the driving unit 3 inputs a driving signal SIG_P(n-1) to the first driving line 8a to light up the pixel 20(m-1, n-1, p), and inputs a driving signal SIG_P(n) to light up the pixel 20(m-1, n, p) to the second driving line 8b. Here, one horizontal scanning period 1H(m-1) refers to a period during which the gate driver selects the (m-1) row of the pixel array, and the same applies to one horizontal scanning period 1H(m) described later. In addition, when one horizontal scanning period 1H(m-1) and one horizontal scanning period 1H(m) are not distinguished from each other, they may simply be referred to as "one horizontal scanning period 1H". In the second half of one horizontal scanning period 1H(m-1), the driving unit 3 inputs a driving signal SIG_S(n-1) to the third driving line 8c to turn off the light of the pixel 20(m-1, n-1, s). Because the pixel 20(m-1, n-1, s) and the pixel 20(m-1, n, s) share the third driving line 8c, no driving signal is input to the pixel 20(m, n, s).

As shown in FIG. 12, in the first half of one horizontal scanning period 1H(m), the drive unit 3 inputs a drive signal SIG_P(n-1) that turns on pixel 20(m, n-1, p) and a drive signal SIG_P(n) that turns on pixel 20(m, n, p) to the first drive line 8a and the second drive line 8b, respectively. In the second half of one horizontal scanning period 1H(m), the drive unit 3 inputs a drive signal SIG_S(n-1) that turns off pixel 20(m, n-1, s) to the third drive line 8c. No drive signal is input to pixel 20(m, n, s).

When the driving unit 3 does not drive one horizontal scanning period 1H in a time division manner, the driving unit 3 does not divide one horizontal scanning period 1H, and inputs the driving signal SIG separately to the first driving line 8a, the second driving line 8b, and the third driving line 8c, as shown in FIG. 13.

FIG. 14 is a partially enlarged view showing an example of a light emitting device 2 in which some of the regular light emitting elements 10a, 10b are unusable, and FIG. 15 is a partially enlarged view showing the state in which a spare light emitting element 10c is mounted on the light emitting device 2 of FIG. 14. FIG. 16 is a timing chart showing an example of a method of inputting a drive signal SIG to the light emitting device 2 of FIG. 15, and FIG. 17 is a timing chart showing another example of a method of inputting a drive signal SIG to the light emitting device 2 of FIG. 15.

In this example, as shown in FIG. 14, the light-emitting element 10 (m, n-1, p) is disabled, and as shown in FIG. 15, the light-emitting element 10 (m, n-1, s) is mounted. The light-emitting element 10 (m, n-1, s) is connected to the first drive line side unevenly distributed portion 9ca.

As shown in FIG. 16, in the first half of one horizontal scanning period 1H(m-1), the driving unit 3 inputs a driving signal SIG_P(n-1) to the first driving line 8a to turn on the pixel 20(m-1, n-1, p), and inputs a driving signal SIG_P(n) to turn on the pixel 20(m-1, n, p) to the second driving line 8b. In the second half of one horizontal scanning period 1H(m-1), the driving unit 3 inputs a driving signal SIG_S(n-1) to turn off the pixel 20(m-1, n-1, s) to the third driving line 8c. Because the pixel 20(m-1, n-1, s) and the pixel 20(m-1, n, s) share the third driving line 8c, no driving signal is input to the pixel 20(m-1, n, s).

As shown in FIG. 16, in the first half of one horizontal scanning period 1H(m), the driving unit 3 inputs a driving signal SIG_P(n-1) that turns off pixel 20(m, n-1, p) to the first driving line 8a, and inputs a driving signal SIG_P(n) that turns on pixel 20(m, n, p) to the second driving line 8b. Note that if pixel 20(m, n-1, p) is a dark spot, the driving signal that turns off pixel 20(m, n-1, p) may be the same as the driving signal that turns on pixel 20(m, n-1, p). In the second half of one horizontal scanning period 1H(m), the driving unit 3 inputs a driving signal SIG_S(n-1) that turns on pixel 20(m, n-1, s) to the third driving line 8c. Since pixel 20(m,n-1,s) and pixel 20(m,n,s) share the third drive line 8c, no drive signal is input to pixel 20(m,n,s). The drive signal input to pixel 20(m,n-1,s) via the third drive line 8c may be the same signal as the drive signal that should originally be input to pixel 20(m,n-1,p), or may be a signal with a lower signal strength (electric potential) than the drive signal that should originally be input to pixel 20(m,n-1,p).

When the driving unit 3 does not drive one horizontal scanning period in a time division manner, the driving unit 3 does not divide one horizontal scanning period 1H, and inputs the driving signal SIG separately to the first driving line 8a, the second driving line 8b, and the third driving line 8c, as shown in Figure 17. In one horizontal scanning period 1H(m), the driving signal input to pixel 20(m,n-1,s) via the first driving line 8a may be the same signal as the driving signal that should originally be input to pixel 20(m,n-1,p), or may be a signal with a lower signal strength (electric potential) than the driving signal that should originally be input to pixel 20(m,n-1,p). Furthermore, in one horizontal scanning period 1H(m), the drive signal SIG_P(n-1) input to pixel 20(m, n-1, p) via first drive line 8a may be a drive signal that turns off pixel 20(m, n-1, p), or, if pixel 20(m, n-1, p) is a dark spot, may be the same signal as the drive signal (lighting signal) that should originally be input to pixel 20(m, n-1, p).

In this manner, when some of the regular light-emitting elements 10a, 10b are unusable, the spare light-emitting elements 10c can be turned on in place of the unusable regular light-emitting elements 10a, 10b.

FIG. 18 is a partially enlarged front view showing another example of a light emitting device 2 in which some of the regular light emitting elements 10a, 10b are unusable, and FIG. 19 is a partially enlarged front view showing the state in which a spare light emitting element 10c is mounted on the light emitting device 2 of FIG. 18. FIG. 20 is a timing chart showing an example of a method of inputting a drive signal SIG to the light emitting device 2 of FIG. 19, and FIG. 21 is a timing chart showing another example of a method of inputting a drive signal SIG to the light emitting device 2 of FIG. 19.

In this example, as shown in FIG. 18, light-emitting elements 10(m-1,n,p) and light-emitting elements 10(m,n-1,p) are disabled, and as shown in FIG. 19, light-emitting elements 10(m-1,n,s) and light-emitting elements 10(m,n-1,s) are mounted. Light-emitting element 10(m-1,n,s) is connected to second drive line side unevenly distributed portion 9cb, and light-emitting element 10(m,n-1,s) is connected to first drive line side unevenly distributed portion 9ca.

As shown in FIG. 20, the driving unit 3 inputs a driving signal SIG_P(n-1) that turns on the pixel 20(m-1, n-1, p) to the first driving line 8a during the first half of one horizontal scanning period 1H(m-1), and inputs a driving signal SIG_P(n) that turns off the pixel 20(m-1, n, p) to the second driving line 8b. Note that if the pixel 20(m-1, n, p) is a dark spot, the driving signal input to the pixel 20(m-1, n, p) via the second driving line 8b may be the same as the driving signal (lighting signal) that should originally be input to the pixel 20(m-1, n, p). The driving unit 3 inputs a driving signal SIG_S(n) that turns on the pixel 20(m-1, n, s) to the third driving line 8c during the second half of one horizontal scanning period 1H(m-1). The drive signal SIG_S(n) input to pixel 20(m-1, n, s) may be the same signal as the drive signal that should originally be input to pixel 20(m-1, n, p), or may be a signal with a lower signal strength (electric potential) than the drive signal that should originally be input to pixel 20(m, n-1, p).

As shown in FIG. 20, the driving unit 3 inputs a driving signal SIG_P(n-1) that turns off the pixel 20(m, n-1, p) to the first driving line 8a and a driving signal SIG_P(n) that turns on the pixel 20(m, n, p) to the second driving line 8b during the first half of one horizontal scanning period 1H(m). Note that when the pixel 20(m, n-1, p) is a dark spot, the driving signal SIG_P(n-1) input to the pixel 20(m, n-1, p) via the first driving line 8a may be the same signal as the driving signal (lighting signal) that should be input to the pixel 20(m, n-1, p). During the second half of one horizontal scanning period 1H(m), the driving unit 3 inputs a driving signal SIG_S(n-1) that turns on the pixel 20(m, n-1, s) to the third driving line 8c. The drive signal input to pixel 20 (m, n-1, s) may be the same as the drive signal that should originally be input to pixel 20 (m, n-1, p), or may be a signal with a lower signal strength (electric potential) than the drive signal that should originally be input to pixel 20 (m, n-1, p).

When the light emitting device 2 does not drive one horizontal scanning period 1H in a time division manner, the driving unit 3 does not divide one horizontal scanning period 1H, and inputs the driving signal SIG separately to the first driving line 8a, the second driving line 8b, and the third driving line 8c, as shown in Figure 21. In one horizontal scanning period 1H(m-1), the driving signal SIG_S(n) input to pixel 20(m-1,n,s) via the third driving line 8c may be the same signal as the driving signal that should originally be input to pixel 20(m-1,n,p), or may be a signal with a lower signal strength (electric potential) than the driving signal that should originally be input to pixel 20(m-1,n,p). Furthermore, in one horizontal scanning period 1H(m-1), the drive signal SIG_P(n) input to pixel 20(m-1,n,p) via second drive line 8b may be a drive signal that turns off pixel 20(m-1,n,p), or, if pixel 20(m-1,n,p) is a dark spot, may be the same signal as the drive signal (lighting signal) that should originally be input to pixel 20(m-1,n,p).

In one horizontal scanning period 1H(m), the drive signal SIG_P(n-1) input to pixel 20(m, n-1, p) may be a drive signal that turns off pixel 20(m, n-1, p), or if pixel 20(m, n-1, p) is a dark spot, it may be the same signal as the drive signal (lighting signal) that should originally be input to pixel 20(m, n-1, p). The drive signal SIG_S(n-1) input to pixel 20(m, n-1, s) via third drive line 8c may be the same signal as the drive signal that should originally be input to pixel 20(m, n-1, p), or it may be a signal with a lower signal strength (electric potential) than the drive signal that should originally be input to pixel 20(m, n-1, p). In addition, the drive signal SIG_P(n) input to pixel 20(m,n,p) via second drive line 8b is a drive signal SIG_P(n) that turns on pixel 20(m,n,p).

FIG. 22 is a partially enlarged view showing yet another example of a light emitting device 2 in which some of the regular light emitting elements 10a, 10b are unusable, and FIG. 23 is a partially enlarged view showing the state in which a spare light emitting element 10c is mounted on the light emitting device 2 of FIG. 22. FIG. 24 is a timing chart showing an example of a method of inputting a drive signal SIG to the light emitting device 2 of FIG. 23, and FIG. 25 is a timing chart showing another example of a method of inputting a drive signal SIG to the light emitting device 2 of FIG. 23.

In this example, as shown in FIG. 22, light-emitting elements 10(m,n-1,p) and light-emitting elements 10(m,n,p) are disabled, and as shown in FIG. 23, light-emitting elements 10(m,n-1,s) and light-emitting elements 10(m,n,s) are mounted. Light-emitting element 10(m,n-1,s) is connected to the first drive line side unevenly distributed portion 9ca, and light-emitting element 10(m,n,s) is connected to the second drive line side unevenly distributed portion 9cb.

As shown in FIG. 24, in the first half of one horizontal scanning period 1H(m-1), the drive unit 3 inputs a drive signal SIG_P(n-1) that turns on pixel 20(m-1, n-1, p) to the first drive line 8a, and inputs a drive signal SIG_P(n) that turns on pixel 20(m-1, n, p) to the second drive line 8b. In the second half of one horizontal scanning period 1H(m-1), the drive unit 3 inputs a drive signal SIG_S(n-1) that turns off pixel 20(m-1, n-1, s) to the third drive line 8c.

As shown in FIG. 24, in the first half of one horizontal scanning period 1H(m), the driving unit 3 inputs a driving signal SIG_P(n-1) that turns off pixel 20(m, n-1, p) to the first driving line 8a, and inputs a driving signal SIG_P(n) that turns off pixel 20(m, n, p) to the second driving line 8b. If pixel 20(m, n-1, p) is a dark spot, the driving signal SIG_P(n-1) that turns off pixel 20(m, n-1, p) may be the same signal as the driving signal that turns on pixel 20(m, n-1, p). If pixel 20(m, n, p) is a dark spot, the driving signal SIG_P(n) that turns off pixel 20(m, n, p) may be a driving signal that turns on pixel 20(m, n, p). In the second half of one horizontal scanning period 1H(m), the driving unit 3 inputs a driving signal SIG_S(n-1) for turning on the pixel 20(m, n-1, s) to the third driving line 8c. The driving signal SIG_S(n-1) input to the pixel 20(m, n-1, s) via the third driving line 8c may be the same as the driving signal that should be input to the pixel 20(m, n-1, p). Note that the light-emitting device 2 is configured such that the pixel 20(m, n-1, s) and the pixel 20(m, n, s) share the third driving line 8c, and therefore the same driving signal SIG_S(n-1) is input to both the pixel 20(m, n-1, s) and the pixel 20(m, n, s). When a drive signal that should be input to pixel 20 (m, n-1, p) is input to both pixel 20 (m, n-1, s) and pixel 20 (m, n, s), luminance unevenness, color unevenness, etc. may occur in the display image of the light-emitting device 2. The drive unit 3 may calculate a correction drive signal based on the drive signal that should be input to pixel 20 (m, n-1, p) and the drive signal that should be input to pixel 20 (m, n, p), and input the correction drive signal to pixel 20 (m, n-1, s) and pixel 20 (m, n, s). The potential of the correction drive signal may be an average potential of the drive signal that should be input to pixel 20 (m, n-1, p) and the drive signal that should be input to pixel 20 (m, n, p), or may be another potential.

When the driving unit 3 does not drive one horizontal scanning period 1H in a time division manner, the driving unit 3 does not divide one horizontal scanning period 1H, and inputs the driving signal SIG separately to the first driving line 8a, the second driving line 8b, and the third driving line 8c, as shown in Figure 25. In one horizontal scanning period 1H(m), the driving signal SIG_P(n-1) input to pixel 20(m, n-1, p) via the first driving line 8a may be a driving signal that turns off pixel 20(m, n-1, p), or, if pixel 20(m, n-1, p) is a dark spot, may be the same signal as the driving signal (lighting signal) that should originally be input to pixel 20(m, n-1, p). In one horizontal scanning period 1H(m), the driving signal SIG_P(n) input to the pixel 20(m,n,p) via the second driving line 8b may be a driving signal that turns off the pixel 20(m,n,p), or may be the same signal as the driving signal (lighting signal) that should be input to the pixel 20(m,n,p) when the pixel 20(m,n,p) is a dark spot. In one horizontal scanning period 1H(m), the driving signal SIG_S(n-1) input to the pixel 20(m,n-1,s) and the pixel 20(m,n,s) may be the same signal as the driving signal that should be input to the pixel 20(m,n-1,p), or may be the above-mentioned correction driving signal.

FIG. 26 is a partially enlarged view showing another example of the state in which a spare light-emitting element 10c is mounted on the light-emitting device 2 of FIG. 22. When the light-emitting element 10(m, n-1, p) and the light-emitting element 10(m, n, p) are unusable, the light-emitting device 2 may be configured as shown in FIG. 26 in such a way that only the light-emitting element 10(m, n-1, s) is mounted and the light-emitting element 10(m, n, s) is not mounted. A drive signal SIG can also be input to the light-emitting device 2 of FIG. 26, as described using FIGS. 24 and 25.

This disclosure makes it possible to provide a high-definition display device with reduced point defects.

The above describes the embodiments of the present disclosure in detail, but the present disclosure is not limited to the above-mentioned embodiments, and various modifications, improvements, etc. are possible within the scope of the gist of the present disclosure. For example, the light-emitting device 2 may have a configuration in which each pixel 20 has multiple light-emitting elements 10. The multiple light-emitting elements 10 may have the same emission wavelength, or may have different emission wavelengths. When the emission wavelengths of the multiple light-emitting elements 10 are the same, the occurrence of NG pixels can be suppressed. In addition, when the emission wavelengths of the multiple light-emitting elements 10 are different from each other, for example, a light-emitting element 10 that emits red light, a light-emitting element 10 that emits green light, and a light-emitting element 10 that emits blue light can be provided in each pixel 20, thereby making it possible to provide a light-emitting device 2 capable of displaying color gradations.

The light emitting device disclosed herein can be implemented in the following configurations (1) to (16).

(1) a first regular light emitting element for constant use, and a first driving line for driving the first regular light emitting element;
a second regular light emitting element for constant use; and a second driving line for driving the second regular light emitting element, the second driving line extending along the first driving line;
a spare light emitting element for redundant use; and a third driving line for driving the spare light emitting element, the third driving line being located between the first driving line and the second driving line and extending along the first driving line and the second driving line;
the third driving line is connected to a spare connection electrode connected to the spare light emitting element in a state where the third driving line overlaps with the spare connection electrode in a plan view;
the spare connection electrode has a first drive line side unevenly distributed portion that is unevenly distributed toward the first drive line side and a second drive line side unevenly distributed portion that is unevenly distributed toward the second drive line side,
A light emitting device, wherein the auxiliary light emitting element is connected to the first driving line side unevenly distributed portion when the first regular light emitting element is unavailable, and is connected to the second driving line side unevenly distributed portion when the second regular light emitting element is unavailable.

(2) the first driving line is connected to a first connection electrode connected to the first regular light emitting element in a state where the first driving line overlaps with the first connection electrode in a plan view;
the second driving line is connected to a second connection electrode connected to the second regular light emitting element in a state where the second driving line overlaps with the second connection electrode in a plan view;
the first connection electrode and the second connection electrode each have a third drive line side unevenly distributed portion that is unevenly distributed toward the third drive line,
The light-emitting device described in (1) above, wherein the first regular light-emitting element is connected to the third driving line side eccentric portion of the first connection electrode, and the second regular light-emitting element is connected to the third driving line side eccentric portion of the second connection electrode.

(3) The light-emitting device described in (2) above, in which the size of the spare connection electrode is larger than the size of both the first connection electrode and the second connection electrode.

(4) The light-emitting device described in (3) above, in which the size of the spare connection electrode is at least twice the size of each of the first connection electrode and the second connection electrode.

(5) A light-emitting device according to any one of (2) to (4) above, in which the resistance of the spare connection electrode is smaller than the resistance of each of the first connection electrode and the second connection electrode.

(6) The light emitting device according to (4) or (5) above, wherein the width of the third driving line is narrower than the width of each of the first driving line and the second driving line.

(7) The light-emitting device described in (6) above, in which the resistance including the spare connection electrode of the third driving line is equivalent to each of the resistance including the first connection electrode of the first driving line and the resistance including the second connection electrode of the second driving line.

(8) A plurality of drive line groups each including the first drive line, the second drive line, and the third drive line are arranged in a row,
The light emitting device according to any one of (2) to (7) above, wherein a dummy connection electrode is provided between a first driving line group and a second driving line group adjacent to the first driving line group.

(9) The light-emitting device described in (8) above, in which the length of the dummy connection electrode is the same as the length of the spare connection electrode in the direction in which the drive line groups are arranged.

(10) The light-emitting device according to (8) or (9) above, wherein the dummy connection electrode is electrically connected to at least one of the first connection electrode and the second connection electrode adjacent thereto.

(11) The first connection electrode has an extension portion that extends to a side opposite to the third drive line side unevenly distributed portion of the first connection electrode with respect to the first drive line,
The light-emitting device according to any one of (2) to (10) above, wherein the second connection electrode has an extension portion that extends on the opposite side of the second drive line from the third drive line side uneven distribution portion of the second connection electrode with respect to the second drive line.

(12) When the preliminary light emitting element is connected to the first driving line side unevenly distributed portion, a first driving signal to be input to the first regular light emitting element is input to the preliminary light emitting element,
A light-emitting device described in any one of (1) to (11) above, wherein when the preliminary light-emitting element is connected to the second driving line side uneven distribution portion, a second driving signal that should be input to the second regular light-emitting element is input to the preliminary light-emitting element.

(13) A signal strength of the first driving signal input to the preliminary light-emitting element is equal to or less than a signal strength of the first driving signal to be input to the first regular light-emitting element,
The light emitting device according to (12) above, wherein the signal strength of the second drive signal input to the auxiliary light emitting element is equal to or less than the signal strength of the second drive signal to be input to the second regular light emitting element.

(14) A length of an input period of the first driving signal input to the preliminary light-emitting element is equal to or shorter than a length of an input period of the first driving signal to be input to the first regular light-emitting element;
The light emitting device according to claim 12 or 13, wherein the length of the input period of the second drive signal input to the preliminary light emitting element is equal to or less than the length of the input period of the second drive signal to be input to the second regular light emitting element.

(15) A light emitting device according to any one of (1) to (14) above,
a light emitting element group including the first regular light emitting element, the second regular light emitting element, and the auxiliary light emitting element, the light emitting element group being arranged in a matrix.

(16) The display device described in (15) above, in which the emission color of the first regular light-emitting element is different from the emission color of the second regular light-emitting element.

REFERENCE SIGNS LIST 1 Display device 2 Light emitting device 3 Drive section 4 Storage section 5 Image data signal source 6 Substrate 6a First surface (display surface)
6b 2nd surface (back side)
6c Third surface (side)
7 Scanning signal line 8 Drive line 8a First drive line 8b Second drive line 8c Third drive line 8g Drive line group 9a First connection electrode 9ab Extension portion 9ac Third drive line side unevenly distributed portion 9b Second connection electrode 9ba Extension portion 9bc Third drive line side unevenly distributed portion 9c Third connection electrode (auxiliary connection electrode)
9ca First drive line side unevenly distributed portion 9cb Second drive line side unevenly distributed portion 9cc Non-unevenly distributed portion 9d Dummy connection electrode 10 Light emitting element 10a First regular light emitting element 10b Second regular light emitting element 10c Preliminary light emitting element 11 Cathode electrode 12 Contact 13 Light emission control signal line 17 Drive control unit 17a, 17b, 17c, 17d, 17e, 17f, 17g, 17h Connection line 20 Pixel 20a First pixel 20b Second pixel 20c Third pixel 20g Light emitting element group 22 Selector circuit 22a, 22b, 22c, 22d, 22e, 22f, 22g, 22h Connection line 120 Data line drive circuit 120a, 120b Connection line

Claims (16)

a first regular light emitting element for constant use, and a first driving line for driving the first regular light emitting element;
a second regular light emitting element for constant use; and a second driving line for driving the second regular light emitting element, the second driving line extending along the first driving line;
a spare light emitting element for redundant use; and a third driving line for driving the spare light emitting element, the third driving line being located between the first driving line and the second driving line and extending along the first driving line and the second driving line;
the third driving line is connected to a spare connection electrode connected to the spare light emitting element in a state where the third driving line overlaps with the spare connection electrode in a plan view;
the spare connection electrode has a first drive line side unevenly distributed portion that is unevenly distributed toward the first drive line side and a second drive line side unevenly distributed portion that is unevenly distributed toward the second drive line side,
A light emitting device, wherein the auxiliary light emitting element is connected to the first driving line side unevenly distributed portion when the first regular light emitting element is unavailable, and is connected to the second driving line side unevenly distributed portion when the second regular light emitting element is unavailable. the first driving line is connected to a first connection electrode connected to the first regular light emitting element in a state where the first driving line overlaps with the first connection electrode in a plan view;
the second driving line is connected to a second connection electrode connected to the second regular light emitting element in a state where the second driving line overlaps with the second connection electrode in a plan view;
the first connection electrode and the second connection electrode each have a third drive line side unevenly distributed portion that is unevenly distributed toward the third drive line,
2. The light emitting device according to claim 1, wherein the first regular light emitting element is connected to the third driving line side unevenly distributed portion of the first connection electrode, and the second regular light emitting element is connected to the third driving line side unevenly distributed portion of the second connection electrode. The light-emitting device according to claim 2, wherein the size of the spare connection electrode is larger than the size of both the first connection electrode and the second connection electrode. The light-emitting device according to claim 3, wherein the size of the spare connection electrode is at least twice the size of each of the first connection electrode and the second connection electrode. The light-emitting device according to any one of claims 2 to 4, wherein the resistance of the auxiliary connection electrode is smaller than the resistance of each of the first connection electrode and the second connection electrode. The light emitting device according to claim 4 or 5, wherein the width of the third driving line is narrower than the width of each of the first driving line and the second driving line. The light-emitting device according to claim 6, wherein the resistance including the spare connection electrode of the third driving line is equivalent to each of the resistance including the first connection electrode of the first driving line and the resistance including the second connection electrode of the second driving line. a plurality of drive line groups each including the first drive line, the second drive line, and the third drive line are arranged side by side;
8. The light emitting device according to claim 2, wherein a dummy connection electrode is provided between a first drive line group and a second drive line group adjacent to the first drive line group. The light-emitting device according to claim 8, wherein the length of the dummy connection electrode is the same as the length of the spare connection electrode in the direction in which the drive line groups are arranged. The light-emitting device according to claim 8 or 9, wherein the dummy connection electrode is electrically connected to at least one of the first connection electrode and the second connection electrode adjacent thereto. the first connection electrode has an extension portion that extends to a side opposite to the third drive line side unevenly distributed portion of the first connection electrode with respect to the first drive line,
The light emitting device according to any one of claims 2 to 10, wherein the second connection electrode has an extension portion that extends on the opposite side of the second drive line from the third drive line side uneven distribution portion of the second connection electrode with respect to the second drive line. When the preliminary light emitting element is connected to the first driving line side unevenly distributed portion, a first driving signal to be input to the first regular light emitting element is input to the preliminary light emitting element;
A light-emitting device according to any one of claims 1 to 11, wherein when the preliminary light-emitting element is connected to the second driving line side uneven distribution portion, a second driving signal to be input to the second regular light-emitting element is input to the preliminary light-emitting element. The signal strength of the first driving signal input to the preliminary light-emitting element is equal to or less than the signal strength of the first driving signal to be input to the first regular light-emitting element,
The light emitting device according to claim 12 , wherein a signal strength of the second driving signal input to the auxiliary light emitting element is equal to or lower than a signal strength of the second driving signal to be input to the second regular light emitting element. The length of the input period of the first driving signal input to the preliminary light-emitting element is equal to or shorter than the length of the input period of the first driving signal to be input to the first regular light-emitting element;
14. The light emitting device according to claim 12, wherein a length of an input period of the second driving signal input to the preliminary light emitting element is equal to or shorter than a length of an input period of the second driving signal to be input to the second regular light emitting element. A light emitting device according to any one of claims 1 to 14,
a light emitting element group including the first regular light emitting element, the second regular light emitting element, and the auxiliary light emitting element, the light emitting element group being arranged in a matrix. The display device according to claim 15, wherein the emission color of the first regular light-emitting element is different from the emission color of the second regular light-emitting element.