Indicating device

Abstract

To provide a display device capable of having a touch detection function without adding an external touch sensor.SOLUTION: In one embodiment, a display device includes a base material, a display unit including a plurality of pixels arranged in matrix, a power supply circuit that supplies potentials for causing the display unit to display images, a touch controller that detects a touch on the display unit, and a switching circuit disposed between the display unit, and the power supply circuit and the touch controller. Each pixel includes a pixel circuit disposed on the base material, and a display element including a lower electrode connected to the pixel circuit, an upper electrode disposed facing the lower electrode, and an organic layer disposed between the lower electrode and the upper electrode and including a light-emitting layer. The upper electrode is connected to the switching circuit, and the switching circuit switches the connection between the upper electrode and the power supply circuit and the connection between the upper electrode and the touch controller.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] Embodiments of the present invention relate to a display device.

Background Art

[0002] In recent years, display devices applying organic light-emitting diodes (OLEDs) as display elements have been put into practical use. The display element includes an organic layer between a pixel electrode and a common electrode. The organic layer includes functional layers such as a hole transport layer and an electron transport layer in addition to a light-emitting layer.

[0003] In some cases, an external touch sensor is added to such a display device to provide a touch detection function. However, in this case, problems such as an increase in the thickness of the display device by the addition of the external touch sensor, an increase in the manufacturing cost of the display device, and an increase in the number of manufacturing steps occur.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] One object of the present disclosure is to provide a display device capable of providing a touch detection function without adding an external touch sensor.

Means for Solving the Problems

[0006] A display device according to an embodiment is A substrate, a display unit including a plurality of pixels arranged in a matrix in a first direction and a second direction intersecting the first direction, a power supply circuit for supplying a potential for displaying an image to the display unit, a touch controller for detecting a touch on the display unit, and a switching circuit disposed between the display unit, the power supply circuit, and the touch controller. Each pixel includes a first sub-pixel of a first color, a second sub-pixel of a second color, and a third sub-pixel of a third color. Each sub-pixel includes a pixel circuit disposed on the substrate, a lower electrode connected to the pixel circuit, an upper electrode disposed opposite to the lower electrode, and an organic layer including a light-emitting layer disposed between the lower electrode and the upper electrode. The upper electrode is divided and disposed for every predetermined number of pixels. Each upper electrode includes a first upper electrode adjacent to one side of the display unit extending along the second direction, and a second upper electrode other than the first upper electrode. The first upper electrode is formed in a rectangular shape. The second upper electrode is formed in an L shape including a main body portion adjacent to the first upper electrode in the first direction, and a lead-out portion extending from the main body portion toward the one side of the display unit. Each upper electrode is disposed so as to partition the organic layer included in each sub-pixel, and is connected to the switching circuit via a power supply line drawn out to the outside of the display unit. The switching circuit selectively switches between connecting the upper electrode and the power supply circuit, and connecting the upper electrode and the touch controller. The power supply line is formed of a low-resistance metal material. One side of the main body of the second upper electrode extending along the second direction is longer than one side of the first upper electrode extending along the second direction. The difference between the one side of the main body of the second upper electrode and the one side of the first upper electrode corresponds to the width along the second direction of the lead-out portion of the second upper electrode. The width along the second direction of the lead-out portion of the second upper electrode is the width of one pixel.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Best Mode for Carrying Out the Invention

[0008] Some embodiments will be described with reference to the drawings. It should be noted that the disclosure is merely an example, and for those that can be easily conceived by those skilled in the art for appropriate modifications while maintaining the gist of the invention, they are naturally included in the scope of the present invention. In addition, the drawings may be represented schematically compared with the embodiments in order to make the description clearer, but they are merely examples and do not limit the interpretation of the present invention. Also, in this specification and each figure, components that exhibit the same or similar functions as those described above with respect to the previously presented figures may be assigned the same reference numerals, and detailed descriptions of duplicates may be omitted.

[0009] It should be noted that in the drawings, for the sake of easy understanding as necessary, the X-axis, Y-axis, and Z-axis that are perpendicular to each other are described. The direction along the X-axis is referred to as the X direction or the first direction, the direction along the Y-axis is referred to as the Y direction or the second direction, and the direction along the Z-axis is referred to as the Z direction or the third direction. The plane defined by the X-axis and the Y-axis is referred to as the X-Y plane, and the plane defined by the X-axis and the Z-axis is referred to as the X-Z plane. Looking at the X-Y plane is referred to as a plan view.

[0010] The display device DSP according to some embodiments is an organic electroluminescence display device including an organic light-emitting diode (OLED) as a display element, and is a display device with a touch detection function, and is mounted on, for example, a television, a personal computer, a portable terminal, a mobile phone, etc. It should be noted that the display element described below can be applied as a light-emitting element of an illumination device, and the display device DSP can be diverted to other electronic devices such as an illumination device.

[0011] FIG. 1 is a diagram showing a configuration example of the display device DSP according to the present embodiment. Among the configurations of the display device DSP, the configuration related to the display of an image is described with reference to FIG. 1. The display device DSP includes a display unit DA for displaying an image on an insulating base material 10. The base material 10 may be glass or a resin film having flexibility.

[0012] The display unit DA includes a plurality of pixels PX arranged in a matrix in the first direction X and the second direction Y. Each pixel PX includes a plurality of sub-pixels SP1, SP2, and SP3. In one example, the pixel PX includes a red sub-pixel SP1, a green sub-pixel SP2, and a blue sub-pixel SP3. Note that in addition to the three-color sub-pixels described above, the pixel PX may include four or more sub-pixels including sub-pixels of other colors such as white.

[0013] A configuration example of one sub-pixel SP included in the pixel PX will be briefly described. The sub-pixel SP includes a pixel circuit 1 and a display element 20 driven and controlled by the pixel circuit 1. The pixel circuit 1 includes a pixel selection switch SST, a driving transistor DRT, an output switch BCT, and a capacitor Cs. The pixel selection switch SST, the driving transistor DRT, and the output switch BCT are switch elements formed of, for example, thin film transistors (TFTs), and each has a gate electrode, a source electrode, and a drain electrode.

[0014] Regarding the pixel selection switch SST, the gate electrode is connected to the scanning line GL, the source electrode is connected to the signal line SL, and the drain electrode is connected to the node N1. The node N1 is connected to the drain electrode of the pixel selection switch SST, the gate electrode of the driving transistor DRT, and one electrode constituting the capacitor Cs. When the pixel selection switch SST is turned on in response to a scanning signal supplied from the scanning line GL, it captures a video signal supplied from the signal line SL.

[0015] Regarding the driving transistor DRT, the gate electrode is connected to the node N1, the source electrode is connected to the drain electrode of the output switch BCT, and the drain electrode is connected to the node N2. The node N2 is connected to the drain electrode of the driving transistor DRT, the other electrode constituting the capacitor Cs, and the anode of the display element 20. The driving transistor DRT outputs a driving current having a current amount corresponding to the above-described video signal to the display element 20.

[0016] Regarding the output switch BCT, the gate electrode is connected to the output control signal line L1, the source electrode is connected to the power supply line PL, and the drain electrode is connected to the source electrode of the drive transistor DRT. The output switch BCT is a switch for controlling the light emission period during which the display element 20 emits light.

[0017] The cathode of the display element 20 is connected to the power supply line FL. Note that the configuration of the pixel circuit 1 is not limited to the illustrated example.

[0018] The display element 20 is an organic light-emitting diode (OLED) which is a light-emitting element. For example, the sub-pixel SP1 includes a display element that emits light corresponding to the red wavelength, the sub-pixel SP2 includes a display element that emits light corresponding to the green wavelength, and the sub-pixel SP3 includes a display element that emits light corresponding to the blue wavelength. By providing the pixel PX with a plurality of sub-pixels SP1, SP2, SP3 having different display colors, multi-color display can be realized.

[0019] However, each of the display elements 20 of the sub-pixels SP1, SP2, SP3 may be configured to emit light of the same color. Thereby, single-color display can be realized.

[0020] Also, when each of the display elements 20 of the sub-pixels SP1, SP2, SP3 is configured to emit white light, a color filter facing the display element 20 may be arranged. For example, the sub-pixel SP1 includes a red color filter facing the display element 20, the sub-pixel SP2 includes a green color filter facing the display element 20, and the sub-pixel SP3 includes a blue color filter facing the display element 20. Thereby, multi-color display can be realized.

[0021] Alternatively, when each of the display elements 20 of the sub-pixels SP1, SP2, SP3 is configured to emit ultraviolet light, multi-color display can be realized by arranging a light conversion layer facing the display element 20.

[0022] FIG. 2 is a cross-sectional view showing a configuration example of the sub-pixel SP (display element 20) shown in FIG. 1. The pixel circuit 1 shown in FIG. 1 is disposed on the substrate 10 and covered by the insulating layer 11. In FIG. 2, only the driving transistor DRT included in the pixel circuit 1 is shown in a simplified manner. The insulating layer 11 corresponds to an underlayer of the display element 20 and is formed of an insulating material such as polyimide, acrylic resin, silicon nitride (SiN), silicon oxide (SiO), etc.

[0023] The display element 20 includes a lower electrode E1, an organic layer OR, and an upper electrode E2. The organic layer OR is disposed sandwiched between the lower electrode E1 and the upper electrode E2.

[0024] The lower electrode E1 is an electrode disposed for each sub-pixel or each display element and is electrically connected to the driving transistor DRT. Such a lower electrode E1 may be referred to as a pixel electrode, a reflective electrode, an anode, etc.

[0025] Although details will be described later, the upper electrode E2 is an electrode disposed for every predetermined number of pixels PX. Such an upper electrode E2 may be referred to as a common electrode, a counter electrode, a cathode, etc.

[0026] The upper electrode E2 is electrically connected to the power supply line FL. The power supply line FL is used as a wiring for supplying a signal for giving a common potential to the upper electrode E2 or as a wiring for supplying a driving signal for touch detection to the upper electrode E2. Note that the power supply line FL is disposed between two adjacent organic layers OR and also serves to partition these organic layers OR.

[0027] The lower electrode E1 is disposed on the insulating layer 11 and is connected to the driving transistor DRT through the opening OP1 formed in the insulating layer 11. The opening OP1 is formed in a region overlapping the driving transistor DRT and is a through hole that penetrates the insulating layer 11 to the driving transistor DRT.

[0028] The lower electrode E1 is a transparent electrode formed of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO). Note that the lower electrode E1 may be a metal electrode formed of a metal material such as silver (Ag), aluminum (Al), titanium (Ti), molybdenum (Mo), tungsten (W), etc. Further, the lower electrode E1 may be a laminate of a transparent electrode and a metal electrode. For example, the lower electrode E1 may be configured as a laminate in which a transparent electrode, a metal electrode, and a transparent electrode are laminated in this order, or may be configured as a laminate of three or more layers.

[0029] The insulating layer 12 is provided on the insulating layer 11 so as to cover the lower electrode E1. The insulating layer 12 has an opening OP2, and a part of the lower electrode E1 is exposed at the opening OP2.

[0030] The organic layer OR is connected to the lower electrode E1 through the opening OP2. In the present embodiment, the organic layer OR includes a light-emitting layer that emits light in any one of red, green, and blue. In addition to the light-emitting layer, the organic layer OR may include functional layers such as a hole injection layer, a hole transport layer, an electron blocking layer, a hole blocking layer, an electron transport layer, and an electron injection layer. Therefore, in FIG. 2, the organic layer OR is shown as a single layer, but the organic layer OR may be a laminate in which a plurality of layers including at least one of the above-described functional layers are laminated in addition to the light-emitting layer.

[0031] On the insulating layer 12, a power supply line FL is disposed. In FIG. 2, an example is illustrated in which the power supply line FL is disposed between the organic layer OR of the sub-pixel SP1 included in a certain pixel PX and the organic layer OR of the sub-pixel SP2 adjacent to the sub-pixel SP1, partitioning these two organic layers OR. Further, in FIG. 2, an example is also illustrated in which the power supply line FL is disposed between a certain pixel PX and another pixel PX adjacent to the pixel PX, partitioning the organic layer OR included in a certain pixel PX (the organic layer OR included in the sub-pixel SP2 of a certain pixel PX) and the organic layer OR included in another adjacent pixel PX (the organic layer OR included in the sub-pixel SP1 of another adjacent pixel PX). Thus, each pixel PX and the sub-pixels SP1, SP2, SP3 included in each pixel PX are partitioned by the power supply line FL.

[0032] The power supply line FL is formed of a low-resistance metal material such as, for example, silver (Ag), aluminum (Al), titanium (Ti), molybdenum (Mo), tungsten (W), etc. The power supply line FL may be a single-layer body formed of one of the above-described metal materials, or may be a laminate in which a plurality of the above-described metal materials are laminated. Although details will be described later, the power supply line FL is drawn out to the outside of the display unit DA and is connected to a switching circuit SW described later.

[0033] The upper electrode E2 is a common layer disposed across a predetermined number of pixels PX, covers the insulating layer 12 and the organic layer OR included in the predetermined number of pixels PX, and is connected to the power supply line FL.

[0034] The upper electrode E2 is a transparent electrode formed of a transparent conductive material such as, for example, ITO or IZO. Note that the upper electrode E2 may be a semi-transmissive metal electrode formed of a metal material such as magnesium (Mg), silver (Ag), aluminum (Al), etc.

[0035] When the potential of the lower electrode E1 is relatively higher than the potential of the upper electrode E2, the lower electrode E1 corresponds to the anode and the upper electrode E2 corresponds to the cathode. Also, when the potential of the upper electrode E2 is relatively higher than the potential of the lower electrode E1, the upper electrode E2 corresponds to the anode and the lower electrode E1 corresponds to the cathode. In this embodiment, as an example, a case is assumed where the lower electrode E1 corresponds to the anode and the upper electrode E2 corresponds to the cathode.

[0036] According to the configuration shown in FIG. 2, a light-emitting region of the display element 20 can be formed in a portion where the organic layer OR is located between the lower electrode E1 disposed in the opening OP2 and the upper electrode E2 disposed as a common layer. However, in the organic layer OR, the portion disposed on the slope of the opening OP2 and the upper surface of the insulating layer 12 hardly emits light because the insulating layer 12 is interposed between the lower electrode E1 and the upper electrode E2.

[0037] FIG. 3 is a diagram showing a configuration example of the display device DSP according to this embodiment. Among the configurations of the display device DSP, the configuration related to the touch detection function will be described with reference to FIG. 3.

[0038] In the display unit DA, a plurality of pixels PX are arranged in a matrix in the first direction X and the second direction Y. As shown enlarged in FIG. 3, the sub-pixels SP1, SP2, SP3 included in one pixel PX are each formed in a substantially rectangular shape extending in the second direction Y in the display unit DA. The sub-pixel SP1 including a display element that emits light corresponding to the red wavelength and the sub-pixel SP2 including a display element that emits light corresponding to the green wavelength are arranged adjacent to each other in the second direction Y. Also, the sub-pixels SP1, SP2 and the sub-pixel SP3 including a display element that emits light corresponding to the blue wavelength are arranged adjacent to each other in the first direction X. The sizes (areas in the X - Y plane) of the sub-pixels SP1, SP2 are formed smaller than that of the sub-pixel SP3.

[0039] Here, although the case where the sub-pixels SP1, SP2, and SP3 are arranged in a pentile pattern has been exemplified, the arrangement pattern of the sub-pixels SP1, SP2, and SP3 is not limited to this, and the sub-pixels SP1, SP2, and SP3 may be arranged, for example, in a stripe pattern.

[0040] In the display device DSP according to the present embodiment, the upper electrode E2 is used not only as an electrode for causing the display element 20 included in the pixel PX to emit light and display an image on the display unit DA, but also as a sensor electrode for detecting the proximity or contact of an external object (for example, a user's finger or the like). The sensor electrode may be referred to as a detection electrode. Further, hereinafter, "detecting the proximity or contact of an external object" may be referred to as "detecting a touch".

[0041] As shown in FIG. 3, a plurality of upper electrodes E2 are arranged in the display unit DA so as not to overlap each other in plan view. Each upper electrode E2 is arranged across a predetermined number of pixels PX and overlaps with the predetermined number of pixels PX in plan view. Note that the number of pixels PX that overlap with the upper electrode E2 in plan view may be different for each upper electrode E2. Hereinafter, attention will be paid to the two upper electrodes E2A and E2B shown in FIG. 3.

[0042] The upper electrode E2A (first upper electrode) is adjacent to the side EY of the display unit DA extending along the second direction Y and is formed in a rectangular shape (more specifically, a substantially square shape). The upper electrode E2A is desirably formed to have an area of, for example, about 5 mm × 5 mm in the X-Y plane. Alternatively, the upper electrode E2A is desirably formed to have an area that overlaps 50 pixels × 50 pixels, that is, 2500 pixels PX in plan view. Note that the upper electrode E2A does not have to be substantially square and may be formed, for example, in a substantially rectangular shape. A power supply line FL is drawn out from one side of the upper electrode E2A extending along the second direction Y and adjacent to the side EY of the display unit DA toward the switching circuit SW from the display unit DA.

[0043] The upper electrode E2B (second upper electrode) is formed in a substantially L shape, having a side of the upper electrode E2A extending along the first direction X and a portion parallel to a side of the upper electrode E2A extending along the second direction Y. The upper electrode E2B has a main body portion E2B1 and a lead-out portion E2B2. The main body portion E2B1 and the lead-out portion E2B2 are integrally formed.

[0044] The main body portion E2B1 is a portion adjacent to the upper electrode E2A along the first direction X and is formed in a substantially rectangular shape. It is desirable that one side of the main body portion E2B1 extending along the second direction Y is formed to be at least one pixel longer than one side of the upper electrode E2A extending along the second direction Y.

[0045] The lead-out portion E2B2 is a portion for leading out the power supply line FL connected to the upper electrode E2B from the display unit DA toward the switching circuit SW, and is arranged adjacent to and side by side with the upper electrode E2A along the second direction Y. The lead-out portion E2B2 extends from the main body portion E2B1 toward the side EY of the display unit DA. The lead-out portion E2B2 has a length (width) of at least one pixel along the second direction Y. The power supply line FL is led out from the end portion of the lead-out portion E2B2 (more specifically, one side of the lead-out portion E2B2 extending along the second direction Y and adjacent to the side EY of the display unit DA) from the display unit DA toward the switching circuit SW.

[0046] All the pixels PX that overlap with each upper electrode E2 in a plan view constitute an image displayed on the display unit DA. That is, the display elements 20 included in the pixels PX that overlap with the lead-out portion E2B2 of the upper electrode E2B also emit light and constitute an image displayed on the display unit DA.

[0047] As described above, the upper electrode E2 (the first upper electrode) adjacent to the side EY along the second direction Y of the display unit DA is substantially square or substantially rectangular, and a power supply line FL is drawn out on one side extending along the second direction Y. On the other hand, the upper electrode E2 (the second upper electrode) other than the upper electrode E2 adjacent to the side EY along the second direction Y of the display unit DA is substantially L-shaped, has a main body portion and a lead-out portion, and a power supply line FL is drawn out at the end of the lead-out portion.

[0048] The switching circuit SW is disposed between each upper electrode E2, the power supply circuit FC, and the touch controller TC. The switching circuit SW selectively switches between connecting each upper electrode E2 to the power supply circuit FC and connecting each upper electrode E2 to the touch controller TC.

[0049] During the display period (the first period) in which the display element 20 included in the pixel PX emits light to display an image on the display unit DA, the switching circuit SW connects each upper electrode E2 to the power supply circuit FC and disconnects each upper electrode E2 from the touch controller TC. According to this, during the display period, a common potential is supplied to each upper electrode E2 via the power supply line FL. By supplying the common potential to each upper electrode E2, the display element 20 included in the pixel PX emits light, and an image is displayed on the display unit DA.

[0050] On the other hand, in the touch detection period (second period) for detecting a touch, the switching circuit SW connects each upper electrode E2 to the touch controller TC and disconnects each upper electrode E2 from the power supply circuit FC. According to this, in the touch detection period, a drive signal for touch detection is supplied to each upper electrode E2 via the power supply line FL. Each upper electrode E2 outputs a detection signal corresponding to the supplied drive signal to the touch controller TC via the power supply line FL. When the touch controller TC receives the input of the detection signal output from each upper electrode E2, it detects a touch based on the waveform of the detection signal. Note that the touch detection period corresponds to a non-display period provided between a certain display period and the next display period. Also, since the display period is a period for causing the display element 20 to emit light as described above, it may also be referred to as a light emission period. In this case, the non-display period may also be referred to as a non-light emission period.

[0051] Here, the effects of the present embodiment will be described using the comparative example shown in FIG. 4. Note that the comparative example is for explaining a part of the effects that the present embodiment can achieve, and does not exclude the effects common to the comparative example and the present embodiment from the scope of the present invention.

[0052] The display device DSP1 in the comparative example is different from the display device DSP according to the present embodiment in that an external touch sensor SE is added as shown in FIG. 4. That is, the display device DSP1 in the comparative example is different from the display device DSP according to the present embodiment in that the upper electrode E2 included in the display element 20 does not function as a sensor electrode.

[0053] In the display device DSP1 in the comparative example, the upper electrode E2 is arranged over all the pixels PX arranged in the display unit DA. A sealing layer 13 is arranged over the upper electrode E2. The external touch sensor SE is arranged over the sealing layer 13. The external touch sensor SE includes a base material 30 and a sensor electrode E3 arranged over the base material 30. Although not shown in FIG. 4, a cover member or the like is further arranged over the sensor electrode E3.

[0054] Thus, in the display device DSP1 in the comparative example, there are problems such as an increase in the thickness (length in the third direction Z) of the display device by the amount of the externally attached touch sensor SE being added, an increase in the manufacturing cost of the display device, and an increase in the number of manufacturing processes.

[0055] On the other hand, in the display device DSP according to the present embodiment, the upper electrode E2 included in the display element 20 is made to function not only as an electrode for causing the display element 20 to emit light and display an image on the display unit DA, but also as a sensor electrode for detecting touch, so that the externally attached touch sensor SE can be omitted.

[0056] Making the upper electrode E2 also function as a sensor electrode is achieved by dividing the upper electrode E2 into a plurality of parts for each predetermined number of pixels PX and arranging them, connecting each upper electrode E2 to the power supply circuit FC during the display period and disconnecting each upper electrode E2 from the touch controller TC, and providing a switching circuit SW that connects each upper electrode E2 to the touch controller TC and disconnects each upper electrode E2 from the power supply circuit FC during the touch detection period. According to this, the touch controller TC can supply a drive signal for touch detection to each upper electrode E2 during the touch detection period, and detect touch based on the detection signal output from each upper electrode E2 in response to the drive signal.

[0057] As described above, the display device DSP according to the present embodiment can reduce the thickness of the display device by the amount of the externally attached touch sensor SE being omitted, compared to the display device DSP1 in the comparative example. Also, the display device DSP according to the present embodiment can reduce the manufacturing cost and the number of manufacturing processes of the display device, compared to the display device DSP1 in the comparative example, by the amount of the externally attached touch sensor SE being omitted.

[0058] Note that in the present embodiment, since a power supply line FL formed of a low-resistance metal material is connected to each upper electrode E2, it is also possible to reduce the resistance of each upper electrode E2.

[0059] According to the above-described embodiment, the upper electrode E2 included in the display element 20 can function not only as an electrode for causing the display element 20 to emit light and display an image on the display unit DA but also as a sensor electrode for detecting a touch. Therefore, it is possible to provide a display device capable of mounting a touch detection function without adding an external touch sensor.

[0060] Although some embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention and are included in the invention described in the claims and its equivalent scope.

Explanation of Reference Numerals

[0061] DA... Display unit, PX... Pixel, SP1, SP2, SP3... Sub-pixel, FL... Power supply line, E2, E2A, E2B... Upper electrode, E2B1... Main body portion, E2B2... Lead-out portion, SW... Switching circuit, FC... Power supply circuit, TC... Touch controller.

Claims

1. a base material, a display unit including a plurality of pixels arranged in a matrix in a first direction and a second direction intersecting the first direction, a power supply circuit for supplying a potential for displaying an image to the display unit, a touch controller for detecting a touch on the display unit, a switching circuit disposed between the display unit, the power supply circuit, and the touch controller, and each of the pixels includes a first sub-pixel of a first color, a second sub-pixel of a second color, and a third sub-pixel of a third color, each of the sub-pixels includes a pixel circuit disposed on the base material, a display element having a lower electrode connected to the pixel circuit, an upper electrode disposed opposite to the lower electrode, and an organic layer including a light-emitting layer disposed between the lower electrode and the upper electrode, the upper electrode is divided and disposed for every predetermined number of pixels, each of the upper electrodes includes a first upper electrode adjacent to one side of the display unit extending along the second direction and a second upper electrode other than the first upper electrode, the first upper electrode is formed in a rectangular shape, the second upper electrode is formed in an L shape including a main body portion adjacent to the first upper electrode in the first direction and a lead-out portion extending from the main body portion toward the one side of the display unit, each of the upper electrodes is disposed so as to partition the organic layer included in each of the sub-pixels and is connected to the switching circuit via a power supply line drawn out to the outside of the display unit, the switching circuit selectively switches between connecting each of the upper electrodes to the power supply circuit and connecting each of the upper electrodes to the touch controller, the power supply line is formed of a metal material having low resistance, one side of the main body portion of the second upper electrode extending along the second direction is longer than one side of the first upper electrode extending along the second direction, a difference between the one side of the main body portion of the second upper electrode and the one side of the first upper electrode corresponds to a width along the second direction of the lead-out portion of the second upper electrode, the width along the second direction of the lead-out portion of the second upper electrode is a width of one pixel, a display device.

2. the switching circuit in a first period of displaying an image on the display unit, connects each of the upper electrodes to the power supply circuit and disconnects each of the upper electrodes from the touch controller, In a second period in which a touch on the display unit is detected, each of the upper electrodes is connected to the touch controller, and each of the upper electrodes is disconnected from the power supply circuit. The display device according to claim 1.

3. The power supply circuit supplies a common potential to each of the upper electrodes in the first period. The touch controller supplies a drive signal for touch detection to each of the upper electrodes in the second period, and detects a touch based on a detection signal output from each of the upper electrodes according to the drive signal. The display device according to claim 2.

Images