JP2012118557A - Light emitting apparatus and electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emitting apparatus that reduces parasitic capacitance of a signal line for transmitting a data signal.SOLUTION: A light emitting apparatus 100 comprises: an effective area A including a plurality of light emitting devices P; a plurality of signal bus lines 30 for transmitting data signals supplied to the respective light emitting devices P; a signal supply line 301 branched off from the signal bus line 30 and for supplying the data signals to the respective light emitting devices P; and power supply line 20 for supplying power source voltage to the respective light emitting devices P. The signal bus line 30 is arranged in the same direction with one side of the effective area A. The power supply line 20 comprises a main power supply line 20A and a sub power supply line 20B, and the main power supply line 20A is arranged on an opposite side of the effective area A across the signal supply line 301. Consequently, the signal supply line 301 and the main power supply line 20A do not cross each other.

Description

  The present invention relates to a light-emitting device using a light-emitting element such as an organic EL (Electroluminescence) and an electronic apparatus including the light-emitting device.

  As a light emitting device, for example, there is an electro-optical device described in Patent Document 1. As shown in FIG. 2, on the substrate of the electro-optical device, a plurality of element circuits including light emitting elements are arranged in the effective area, and various wirings such as power supply wiring are arranged outside the effective area. Yes.

JP 2004-272215 A

Incidentally, in the electro-optical device described in Patent Document 1, as shown in FIG. 2, a wiring 52 (signal supply line) for transmitting a data signal to the element circuit is arranged from the lower end portion of the substrate toward the effective region. In addition, common wirings 30, 32, and 34 (power supply wirings) for supplying a power supply voltage to each element circuit are arranged in the same direction as the side on the lower end side of the substrate in the effective area and intersect the wiring 52. Yes. Generally, in order to reliably supply a data signal to each element circuit within a predetermined period, it is desirable to reduce the parasitic capacitance of the signal supply line as much as possible. On the other hand, the power supply wiring has a very wide width compared to the signal supply line for the purpose of suppressing variations in light emission luminance due to voltage drop. For this reason, when the signal supply line intersects with the power supply line, a large parasitic capacitance is generated in proportion to the intersection area, and the data signal flowing through the signal supply line is deteriorated. As a result, there may occur a case where the signal wave does not rise sufficiently within a predetermined period and the light emitting element does not emit light at a predetermined gradation.
The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a light-emitting device that can reduce the parasitic capacitance of a signal supply line and prevent deterioration of a data signal.

  A light emitting device according to the present invention includes a substrate in which a plurality of light emitting elements are arranged in an effective area, a signal bus wiring that extends in the same direction as one side of the effective area, and transmits a data signal supplied from the outside, A signal supply line for branching from the signal bus wiring and supplying the data signal to each light emitting element; and a power supply wiring for supplying a power supply voltage to each light emitting element. A main power supply wiring extending in the same direction as the signal bus wiring, a sub power supply wiring that is narrower than the main power supply wiring and branched from the main power supply wiring, and a power supply line that connects the sub power supply wiring and the light emitting elements. And the main power supply wiring is disposed on the opposite side of the effective area across the signal bus wiring. In this light emitting device, the main power supply wiring is disposed on the end side of the substrate with respect to the signal bus wiring. In other words, the signal bus wiring is disposed closer to the effective area than the main power supply wiring. For this reason, the signal supply line connected from the signal bus line to each light emitting element does not intersect the main power supply line. Therefore, the parasitic capacitance of the signal supply line is reduced. As a result, deterioration of the data signal can be prevented, and each light emitting element can emit light at a predetermined gradation. Even if the sub power supply wiring intersects with the signal supply line, the line width of the sub power supply wiring is narrower than that of the main power supply wiring. Capacity is reduced. Therefore, the deterioration of the data signal is suppressed, and consequently the deterioration of the image quality is suppressed.

In a preferred aspect of the present invention, in the light emitting device, the signal supply line is connected to the first signal supply line (for example, the signal supply line 301 in FIG. 1) branched from the signal bus line and the light emitting elements. And a second signal supply line (for example, the data line 102 in FIG. 1), which is provided between the first signal supply line and the second signal supply line, and is turned on or off according to a control signal. A switching element (for example, a switching transistor) that selectively supplies the data signal to each of the light emitting elements, and the control signal is disposed closer to the end of the substrate than the switching element. A control circuit (for example, a shift register) for generating the sub power supply line, the sub power supply line having a first sub power supply line and a second sub power supply line, and a plurality of the first sub power supply lines. The power supply voltage is supplied from the main power supply wiring to the second sub power supply wiring, and the second sub power supply wiring extends in the same direction as the signal bus wiring, and is connected to the power supply line. The two sub power supply lines are arranged on the effective region side with respect to the switching element.
If the second sub power supply wiring is disposed on the end side of the substrate with respect to the switching element, the second sub power supply wiring intersects with a control signal wiring for transmitting a control signal from the control circuit to the switching element. However, in this aspect, by arranging the second sub power supply wiring on the effective region side of the switching element, the control signal wiring and the second sub power supply wiring can be configured not to cross each other. Therefore, the control signal wiring and the second sub power supply wiring can be formed in the same layer, and the manufacturing is simplified. In addition, since the power supply voltage is supplied to the second sub power supply wiring via the plurality of first sub power supply wirings, the impedance of the second sub power supply wiring can be reduced.

  Preferably, the number of switching elements corresponding to the number of the signal bus lines is simultaneously turned on or off by the control signal, and the first sub power supply line is provided every integral multiple of the number of the signal bus lines. It is preferable that the switching elements are disposed so as to pass through the gaps between the adjacent switching elements. When a plurality of switching elements are simultaneously turned on or off by one control signal, the control signal wiring is commonly connected to the plurality of switching elements. In this embodiment, the first sub power supply wiring is arranged without traversing the commonly connected control signal wiring. Therefore, according to this aspect, the control signal wiring and the first sub power supply wiring can be formed in the same layer, and the manufacturing becomes simple. In addition, since the first sub power supply wiring is provided every other number of switching elements corresponding to the number of signal bus wirings, the layout area can be reduced.

  Further preferably, the control circuit is arranged on an end portion side of the substrate with respect to the main power supply wiring. According to this aspect, since the clock signal and pulse start signal wirings input to the control circuit do not intersect with the power supply wiring, no cross capacitance is generated between these signal lines and the power supply wiring. Therefore, it is possible to prevent malfunction of the control circuit.

  Furthermore, this invention is grasped | ascertained also as an electronic device provided with either of the said light-emitting devices. According to the present invention, the same effect as any of the effects related to the light emitting device according to each aspect described above can be achieved.

It is a block diagram which shows the structure of the light-emitting device which concerns on one Embodiment of this invention. It is a top view which shows the detail of the area | region B shown in FIG. It is a top view which shows a comparative example. It is a perspective view which shows the structure of the mobile type personal computer which employ | adopted the light-emitting device. It is a perspective view which shows the structure of the mobile telephone to which the light-emitting device is applied. It is a perspective view which shows the structure of the portable information terminal to which the light-emitting device is applied.

Embodiments according to the present invention will be described below with reference to the accompanying drawings. In the drawings, the ratio of dimensions of each part is appropriately changed from the actual one.
<A: Embodiment>
FIG. 1 shows a configuration of a light emitting device 100 according to an embodiment of the present invention. As shown in FIG. 1, an effective area A including a plurality of light emitting elements P arranged in a matrix is formed on the surface of the substrate 10 of the light emitting device 100. In the effective area A, m scanning lines 101 along the X direction, n data lines 102 and n power supply lines 103 orthogonal to these are formed. The light emitting element P (more precisely, an element circuit including the light emitting element P) is arranged corresponding to the intersection of the scanning line 101 and the data line 102. The light emitting element P of the present embodiment is an organic light emitting diode (organic EL) element having a light emitting functional layer including a light emitting layer formed of an organic EL (Electroluminescence) material, and an anode and a cathode sandwiching the light emitting functional layer. Light is emitted at a luminance corresponding to the current supplied to the light emitting functional layer. A power supply voltage VEL is supplied to each light emitting element P through a feeder line 103.

  As shown in FIG. 1, in the light emitting element P of the present embodiment, three types of light emitting elements P that can emit light in RGB colors are arranged in a stripe pattern. The light emitting element group G composed of three light emitting elements P of RGB three colors is controlled so that the three light emitting elements P emit light simultaneously according to a control signal Sc given from a shift register 15 described later. That is, the light emitting device 100 of this embodiment is a color organic EL panel.

  The light emitting device 100 further includes scanning line driving circuits 50A and 50B arranged on the left and right sides of the effective area A. Each of the scanning line drive circuits 50A and 50B sequentially selects the scanning line 101 in accordance with a control signal (not shown) such as a Y clock signal and a Y transfer start pulse signal input from the outside. At this time, a current corresponding to the data signal D supplied to the data line 102 flows to the light emitting element P, and each light emitting element P emits light at a gradation corresponding to the data signal D.

  As shown in FIG. 1, the light emitting device 100 further includes a shift register 15 disposed in a region along the lower end of the substrate 10 with the X direction as a longitudinal direction, and an X region disposed inside the substrate 10 from the shift register 15. Power supply wiring 20 arranged in the direction. Three signal bus wirings 30 (30r, 30g, 30b) that also extend in the X direction are disposed further inside than the power supply wiring 20, and a plurality of signal bus wirings 30 and an effective area A are provided in the gap between the plurality of signal bus wirings 30 (30r, 30g, 30b). A selection unit 40 is arranged. The signal bus wiring 30 is a signal line for transmitting the data signal D supplied to each light emitting element P. The signal bus wiring 30r is a signal line for transmitting the data signal Dr given to the light emitting element P that emits light in R color, and the signal bus wiring 30g is a signal that transmits the data signal Dg given to the light emitting element P that emits light in G color. The signal bus wiring 30b is a signal line for transmitting the data signal Db given to the light emitting element P that emits light in B color. These data signals D (Dr, Dg, Db) are externally input via terminals provided at the lower end of the substrate 10 and are designated by image data by an external control means (not shown). It is held at a potential according to the gradation. Each signal bus line 30 is connected to the selection unit 40 via a signal supply line 301 (301r, 301g, 301b) branched from each signal bus line 30.

  An X clock signal CK and an X transfer start pulse SP are input to the shift register 15 via a terminal provided at the lower end of the substrate 10. The shift register 15 sequentially shifts the X transfer start pulse SP based on the X clock signal CK to generate a plurality of shift pulses that are exclusively effective. This shift pulse is supplied as a control signal Sc to each selector 40 via the control signal wiring 10a. The shift register 15 exclusively sequentially turns on all of the plurality of selection units 40 within one scanning period in which one of the scanning lines 101 is selected by the above-described scanning line driving circuits 50A and 50B.

  FIG. 2 is a plan view showing a detailed configuration of the region B in the substrate 10. As illustrated in FIG. 2, the selection unit 40 includes three switching transistors (switching elements) Ts1, Ts2, and Ts3 corresponding to the three light emitting elements P of RGB colors of the light emitting element group G. In other words, the selection unit 40 includes the number of switching transistors Ts corresponding to the number (three) of the signal bus lines 30. One control signal Sc is supplied to each switching transistor Ts (Ts1, Ts2, Ts3) of this example in common to each gate electrode. When each switching transistor Ts is turned on by supplying the control signal Sc from the shift register 15 to the selection unit 40, the data signal D from each signal bus line 30 is read via the signal supply line 301. , And supplied to each data line 102. Therefore, the light emitting device 100 of this embodiment is a dot sequential drive type in which each light emitting element group G is sequentially driven by the control signal Sc from the shift register 15.

  Each element shown in FIG. 2 is formed by a gate wiring shown by hatching and a source wiring located above the gate wiring with an insulating layer (not shown) interposed therebetween. As shown in the figure, a control signal wiring 10a for supplying a control signal Sc from the shift register 15 to each switching transistor Ts, each signal supply line 301 branched from each signal bus wiring 30, and a gate electrode of each switching transistor Ts. Are formed by gate wiring. On the other hand, each signal bus line 30 and each electrode of each switching transistor Ts are formed by source lines. An element formed by the gate wiring (for example, the signal supply line 301) and an element formed by the source wiring (for example, the signal bus wiring 30) are conducted through the contact hole CH.

  As shown in FIGS. 1 and 2, the power supply wiring 20 includes a main power supply wiring 20A disposed in the X direction between the shift register 15 and the three signal bus wirings 30, and the main power supply wiring 20A. A branch power supply wiring 20B. The main power supply wiring 20A is formed of a source wiring, and the sub power supply wiring 20B is formed of a gate wiring. The sub power supply wiring 20B passes through the gap between the adjacent selection sections 40 and a plurality of first sub power supply wirings 20B1 disposed in the Y direction, and the first power supply wiring 20B1 extends in the X direction in the gap between the selection section 40 and the effective area A. 2 sub power supply wiring 20B2. The second sub power supply wiring 20B2 is connected to each feeder line 103. In this configuration, the power supply voltage VEL input from the outside through the terminal at the lower end of the substrate 10 is transmitted through the main power supply wiring 20A, the contact hole CH, the first sub power supply wiring 20B1, and the second sub power supply wiring 20B2. It is supplied to the feeder line 103.

  Here, the power supply wiring 20 desirably has a low resistance from the viewpoint of preventing a voltage drop in the wiring and preventing variations in luminance of the light emitting element P. Therefore, in general, the power supply wiring 20 is configured by a wide wiring. On the other hand, as described above, the data signal D is supplied from the signal bus line 30 to each light emitting element P through the signal supply line 301. The data signal D is selected within one scanning period. All the light emitting elements P must be written. Therefore, the period during which the selection unit 40 is turned on by the control signal Sc is an extremely short period, and it is desirable that the signal waveform of the data signal D sufficiently rises within this period. Otherwise, it may happen that the light emitting element P does not emit light at the intended gradation and the image quality deteriorates. Therefore, from the viewpoint of preventing deterioration of signals transmitted through the signal bus wiring 30 and the signal supply line 301, it is desirable to reduce parasitic capacitance in these signal lines as much as possible. In view of the above, it is desirable to dispose both of them so that the cross capacitance generated by the cross between the power line 20 having a wide line width and the signal bus line 30 or the signal supply line 301 is reduced as much as possible.

  FIG. 3 shows an example in which the signal bus wiring 30 is arranged closer to the end portion of the substrate 10 than the power supply wiring 20 as a comparative example. As shown in FIG. 3, in this comparative example, the signal supply line 301 branched from each signal bus line 30 intersects the main power supply line 20A and is connected to the selection unit 40. In the intersection portion C2, a cross capacitance (capacity corresponding to the cross area W2 × W4) corresponding to the line width W4 of the main power supply wiring 20A and the line width W2 of the signal supply line 301 is generated. On the other hand, as shown in FIG. 2, in the light emitting device 100 of this embodiment, the signal bus line 30 is disposed inside the main power supply line 20 </ b> A, so that the signal supply line 301 and the power supply line 20 do not intersect. . Instead, the signal bus line 30 and the sub power supply line 20B cross each other, and at the crossing portion C1, the cross capacitance (intersection area W1 × (Capacity corresponding to W3) occurs. In the present embodiment, the crossing area W1 × W3 <the crossing area W2 × W4 is set so that the crossing capacitance is smaller than that in the comparative example. In particular, the line width W4 is very large compared to the width of other wirings from the viewpoint of supplying power to the entire apparatus. Further, for example, since the sub power supply wiring 20B supplies a power supply voltage to each light emitting element P, it is desirable that the line width W3 is next to the line width W4. Further, since the signal bus wiring 30 has a longer wiring length than the signal supply line 301, it is desirable that W2 <W1. Therefore, it is desirable that W2 <W1 <W3 <W4. Thus, according to the present embodiment, the main power supply wiring 20A is arranged on the inner side of the signal bus wiring 30 to transmit the data signal D (in this case, the signal bus wiring 30 or the signal supply line 301) The crossing area with the power supply wiring 20 is reduced, and the deterioration of the data signal D can be suppressed. As a result, image quality deterioration is suppressed.

  By the way, in this embodiment, since the main power supply wiring 20A is arranged at a position farther from the effective area A than the signal bus wiring 30, wiring for supplying the power supply voltage VEL to each light emitting element P is required. . Therefore, in the light emitting device 100 of the present embodiment, the second sub power supply line 20B2 extending in the X direction and connected in common to each power supply line 103 is disposed in the gap between the selection unit 40 and the effective area A. . The power supply voltage VEL from the main power supply wiring 20A is supplied to the second sub power supply wiring 20B2 through the plurality of first sub power supply wirings 20B1. Therefore, the impedance of the second sub power supply wiring 20B2 can be kept as small as that of the main power supply wiring 20. Further, if the second sub power supply wiring 20B2 is disposed closer to the end portion of the substrate 10 than the selection unit 40, the second sub power supply wiring 20B2 and the control signal wiring 10a intersect each other. However, in the present embodiment, since the second sub power supply wiring 20B2 is arranged on the effective region A side of the selection unit 40, the second sub power supply wiring 20B2 and the control signal wiring 10a can be configured not to cross each other. Therefore, the control signal wiring 10a and the second sub power supply wiring 20B2 can be formed in the same layer (gate wiring), and the manufacturing is simplified.

Furthermore, as described above, the selection unit 40 includes three switching transistors Ts, and is simultaneously turned on or off by one control signal Sc. Therefore, if the first sub power supply wiring 20B1 is arranged so as to cross the selection unit 40, the control signal wiring 10a and the first sub power supply wiring 20B1 intersect each other. However, in the present embodiment, since the first sub power supply wiring 20B1 passes through the gap between the adjacent selection units 40, the first sub power supply wiring 20B1 and the control signal wiring 10a do not intersect. Therefore, both can be formed of the same layer (gate wiring), and the manufacturing is simplified. Further, the layout area of the entire substrate 10 can be reduced as compared with the aspect in which the first sub power supply wiring 20B1 is disposed in all the gaps between the adjacent switching transistors Ts.
In this example, one first sub power supply wiring 20B1 is provided for one selection unit 40, but one first sub power supply wiring 20B1 may be provided for a plurality of selection units 40. Good. In other words, the first sub power supply line 20B1 may be disposed so as to pass between the adjacent switching transistors Ts every integral multiple of the signal bus line 30.

  In addition, as described above, the X clock signal CK and the X pulse start signal SP are input to the shift register 15 from the outside. In this embodiment, since the shift register 15 is arranged on the end side of the substrate 10 from the main power supply wiring 20A, the wiring for inputting the X clock signal CK and the X pulse start signal SP to the shift register 15 is the power supply wiring 20. Do not cross with. Therefore, it is possible to prevent malfunction of the shift register 15.

  As described above, according to the light emitting device 100 of this embodiment, the cross capacitance generated when the power supply wiring 20 intersects with the signal bus wiring 30 or the signal supply line 301 is reduced. Therefore, deterioration of the data signal D transmitted through the signal bus wiring 30 and the signal supply line 301 is suppressed, and as a result, high quality image quality is realized. Further, by disposing the control signal signal line 10a and the sub power supply wiring 20B so as not to intersect with each other, it is possible to form these wirings in the same layer, and the manufacturing is simplified. Further, by providing a plurality of first sub power supply wirings 20B1 and supplying the power supply voltage VEL to the second sub power supply wiring 20B2, the second sub power supply wiring 20B2 is kept at a low impedance, and the first sub power supply wiring 20B1 is provided with a plurality of power supplies. Since the mode is provided for each switching transistor Ts, the layout area can be reduced. As described above, according to the light emitting device 100, it is possible to efficiently arrange each wiring while suppressing signal deterioration.

<B: Modification>
In the embodiment described above, the three types of light emitting elements P that emit light in any of the three colors RGB are arranged. However, the light emitting elements that emit white light are arranged, and the traveling direction of the emitted light from the light emitting elements It is good also as an aspect which provides a color filter in. In the above-described embodiment, the dot sequential driving method is adopted, but a line sequential driving method may be adopted.
Further, the light emitting device 100 may be used as an optical head of an image forming apparatus. In that case, a latch circuit may be provided after the selection unit 40 so that all the light emitting elements P emit light simultaneously.
In any of these aspects, the same effect as described above is achieved.

<C: Application example>
Next, an electronic apparatus using the light emitting device according to the present invention will be described. FIGS. 4 to 6 show a form of an electronic apparatus that employs the light emitting device according to any one of the above forms as a display device.

  FIG. 4 is a perspective view showing the configuration of a mobile personal computer employing a light emitting device. The personal computer 2000 includes a light emitting device 100 that displays various images, and a main body 2010 on which a power switch 2001 and a keyboard 2002 are installed. Since the light emitting device 100 uses an organic light emitting diode element as the light emitting element E, it is possible to display an easy-to-see screen with a wide viewing angle.

  FIG. 5 is a perspective view illustrating a configuration of a mobile phone to which the light emitting device is applied. A cellular phone 3000 includes a plurality of operation buttons 3001, scroll buttons 3002, and a light emitting device 100 that displays various images. By operating the scroll button 3002, the screen displayed on the light emitting device 100 is scrolled.

  FIG. 6 is a perspective view showing a configuration of a personal digital assistant (PDA) to which the light emitting device is applied. The portable information terminal 4000 includes a plurality of operation buttons 4001, a power switch 4002, and a light emitting device 100 that displays various images. When the power switch 4002 is operated, various kinds of information such as an address book and a schedule book are displayed on the light emitting device 100.

  In addition, as an electronic device to which the light emitting device according to the present invention is applied, in addition to the devices shown in FIGS. 4 to 6, a digital still camera, a television, a video camera, a car navigation device, a pager, an electronic notebook, electronic paper, Examples include calculators, word processors, workstations, videophones, POS terminals, printers, scanners, copiers, video players, devices equipped with touch panels, and the like. Further, the use of the light emitting device according to the present invention is not limited to the display of images. For example, in an image forming apparatus such as an optical writing type printer or an electronic copying machine, an optical head (writing head) that exposes a photosensitive member according to an image to be formed on a sheet is used. The light emitting device of the present invention is also used as an optical head.

  DESCRIPTION OF SYMBOLS 10 ... Board | substrate, 15 ... Shift register, 20 ... Power supply wiring, 20A ... Main power supply wiring, 20B ... Sub power supply wiring, 20B1 ... First sub power supply wiring, 20B2 ... Second sub power supply wiring, 30 ... Signal bus wiring, 301 ... Signal supply line 40 ... selection unit 50A, 50B ... scan line drive circuit, 100 ... light emitting device, 101 ... scan line, 102 ... data line 102 ... feed line, A ... effective area, Ts (Ts1, Ts2, Ts3) ... switching transistor, P ... light emitting element.

The light emitting device according to the present invention includes m scanning lines extending in a first direction, n data lines extending in a second direction intersecting the first direction, and the second data line. N power supply lines extending in the direction, a plurality of light emitting elements arranged at positions corresponding to intersections of the m scanning lines and the n data lines, and a terminal to which a data signal is supplied from the outside A plurality of selection units for supplying the data signals supplied to the terminals to each of the n data lines, a main power supply wiring extending in the first direction, and a second power source wiring extending in the second direction. A plurality of first sub-power wirings that are electrically connected to the main power wiring, the n power supply lines and the plurality of first sub-power wirings extending in the first direction. A second sub power supply wiring that is electrically connected, and the plurality of selection units include a plurality of switching elements, Each of the first sub-power supply line is disposed in the gap of the selected portion adjacent one of said plurality of selector is provided every two or more switching elements of the plurality of switching elements.
In a preferred aspect of the present invention, the light emitting device further includes a control signal wiring for supplying a control signal for controlling the plurality of selection units, and the second sub power supply wiring does not intersect the control signal wiring. Are arranged as follows.
In a preferred aspect of the present invention, the second sub power supply wiring and the control signal wiring are formed in the same layer.
In a preferred aspect of the present invention, the second sub power supply wiring is disposed between a region where the plurality of light emitting elements are disposed and the plurality of selection units.
In a preferred aspect of the present invention, the plurality of first sub power supply lines are arranged so as not to intersect the control signal lines.
In a preferred aspect of the present invention, the plurality of first sub power supply lines and the control signal lines are formed in the same layer.
In a preferred aspect of the present invention, one sub power supply wiring among the plurality of first sub power supply wirings is arranged so as to correspond to one selection unit among the plurality of selection units.
In a preferred aspect of the present invention, one sub power supply wiring among the plurality of first sub power supply wirings is arranged so as to correspond to a plurality of selection units among the plurality of selection units.
In a preferred aspect of the present invention, the two or more switching elements are between adjacent first sub-power supply lines among the plurality of first sub-power supply lines, and the main power supply line and the second sub-power supply line. Between.
In a preferred aspect of the present invention, each of the plurality of selection units includes a first switching element connected between a first data line and the terminal, and a second data line and the terminal. A second switching element connected to the third data line and a third switching element connected between the third data line and the terminal, the first switching element, the second switching element, and the second switching element, The switching element 3 is disposed between adjacent first sub-power supply lines among the plurality of first sub-power supply lines, and between the main power supply line and the second sub-power supply line.
A light emitting device according to the present invention includes a substrate in which a plurality of light emitting elements are arranged in an effective area, a signal bus wiring that extends in the same direction as one side of the effective area, and transmits a data signal supplied from the outside, A signal supply line for branching from the signal bus wiring and supplying the data signal to each light emitting element; and a power supply wiring for supplying a power supply voltage to each light emitting element. A main power supply wiring extending in the same direction as the signal bus wiring, a sub power supply wiring that is narrower than the main power supply wiring and branched from the main power supply wiring, and a power supply line connecting the sub power supply wiring and the light emitting elements. And the main power supply wiring is disposed on the opposite side of the effective area across the signal bus wiring. In this light emitting device, the main power supply wiring is disposed on the end side of the substrate with respect to the signal bus wiring. In other words, the signal bus wiring is disposed closer to the effective area than the main power supply wiring. For this reason, the signal supply line connected from the signal bus line to each light emitting element does not intersect the main power supply line. Therefore, the parasitic capacitance of the signal supply line is reduced. As a result, deterioration of the data signal can be prevented, and each light emitting element can emit light at a predetermined gradation. Even if the sub power supply wiring intersects with the signal supply line, the line width of the sub power supply wiring is narrower than that of the main power supply wiring. Capacity is reduced. Therefore, the deterioration of the data signal is suppressed, and consequently the deterioration of the image quality is suppressed.

Claims (5)

A substrate having a plurality of light emitting elements arranged in an effective region;
A signal bus line extending in the same direction as one side of the effective area and transmitting a data signal supplied from the outside;
A signal supply line for branching from the signal bus wiring and supplying the data signal to the light emitting elements;
A power supply wiring for supplying a power supply voltage to each of the light emitting elements;
Have
The power supply wiring includes a main power supply wiring extending in the same direction as the signal bus wiring, a sub power supply wiring that is narrower than the main power supply wiring and branched from the main power supply wiring, the sub power supply wiring, and the light emitting elements. A power supply line connecting
The main power supply wiring is disposed on the opposite side of the effective area across the signal bus wiring,
Light emitting device. The signal supply line has a first signal supply line branched from the signal bus wiring and a second signal supply line connected to each light emitting element,
The data signal is provided between the first signal supply line and the second signal supply line, and selectively outputs the data signal to each light emitting element by being turned on or off according to a control signal. A switching element to be supplied;
A control circuit that is disposed closer to the end of the substrate than the switching element and generates the control signal;
Further comprising
The sub power supply wiring has a first sub power supply wiring and a second sub power supply wiring, and a plurality of the first sub power supply wirings are arranged to transfer the power supply voltage from the main power supply wiring to the second sub power supply wiring. The second sub-power supply line extends in the same direction as the signal bus line, and is connected to the power supply line,
The second sub power supply wiring is disposed on the effective region side with respect to the switching element,
The light emitting device according to claim 1. The number of switching elements corresponding to the number of the signal bus wires is simultaneously turned on or off by the control signal,
The first sub power supply wiring is disposed so as to pass through a gap between the adjacent switching elements every integer multiple of the number of the signal bus wirings.
The light emitting device according to claim 2. The control circuit is disposed closer to the end of the substrate than the main power supply wiring.
The light emitting device according to claim 2.   An electronic apparatus comprising the light-emitting device according to claim 1.

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