Display device

Abstract

To provide: a display device suitable for upsizing; a display device for suppressing display irregularities; or a display device capable of performing display along a curved surface.SOLUTION: A display device includes two display panels, two plates, two stages, two drive circuits, two adjustment means, and a frame. In the display device, the display panel includes a display part, an operation circuit part, a terminal, an external electrode, a transparent part, and a first part, and is flexible. The transparent part includes an area for transmitting visible light. The display panel is fixed to the plates such that one portion of the transparent part and the display part protrude from the plates, and one display part out of the two display panels and the other transparent part overlap each other.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] One aspect of the present invention relates to a display device.

[0002] Note that one aspect of the present invention is not limited to the above technical field. The technical field of one aspect of the invention disclosed in this specification etc. relates to an article, a method, or a manufacturing method. Or, one aspect of the present invention relates to a process, a machine, a manufacture, or a composition (composition of matter). Therefore, more specifically, the technical field of one aspect of the present invention disclosed in this specification includes, as an example, semiconductor devices, display devices, light-emitting devices, lighting devices, power storage devices, memory devices, input devices, driving methods thereof, or manufacturing methods thereof. can be cited.

Background Art

[0003] In recent years, there has been a demand for larger display devices. For example, household television devices (also referred to as TVs or television receivers), digital signage, PID (Public Information Display), etc. can be cited. Also, digital signage, PID, etc. can increase the amount of information that can be provided as they become larger, and when used for advertisements etc., the larger they are, the more likely they are to catch people's attention, and it is expected to enhance the advertising effect.

[0004] Typical display devices include light-emitting devices equipped with light-emitting elements such as organic EL (Electro Luminescence) elements and light-emitting diodes (LEDs: Light Emitting Diodes), liquid crystal display devices, and electronic paper that performs display by an electrophoresis method etc. - etc. can be mentioned.

[0005] For example, the basic configuration of an organic EL element is a layer containing a light-emitting organic compound sandwiched between a pair of electrodes. By applying a voltage to this element, light emission can be obtained from the light-emitting organic compound. A display device to which such an organic EL element is applied does not require a backlight that was necessary in a liquid crystal display device or the like, and thus can realize a thin, lightweight, high-contrast, and low-power consumption display device. For example, an example of a display device using an organic EL element is disclosed in Patent Document 1.

[0006] In addition, Patent Document 2 discloses a flexible active matrix light-emitting device provided with a transistor, which is a switching element, and an organic EL element on a film substrate.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0008] One aspect of the present invention has an object of providing a display device suitable for enlargement. Or, one aspect of the present invention has an object of providing a display device with reduced display unevenness. Or, one aspect of the present invention has an object of providing a display device capable of performing uniform display within a display surface. Or, one aspect of the present invention has an object of providing a display device in which seams are not recognized within a display surface. One of the problems is to provide a display device that enables difficult-to-see displays.

[0009] Or, one of the problems is to provide a novel display device.

[0010] Note that the description of these problems does not prevent the existence of other problems. One aspect of the present invention is not required to solve all of these problems. Also, problems other than the above will be apparent from the description in the detailed description and the like, and problems other than the above can be extracted from the description in the detailed description and the like.

Means for Solving the Problems

[0011] One aspect of the present invention is a display device including a display panel, a plate, a stage, a drive circuit, and adjustment means, each provided in two, and including a frame. The frame includes a plurality of columns, a plurality of beams, and a plurality of bottom plates. The adjustment means has a function of adjusting the position and angle of the stage and is fixed to the frame. The drive circuit has a function of outputting a signal for driving the display panel. The stage is fixed to the adjustment means and includes an area for arranging the drive circuit and the plate. The plate includes a mechanism for connecting to the stage on a first surface and a convex curved surface on one side surface. The display panel includes a display portion, an operation circuit portion, terminals, external electrodes, a transparent portion, and a first portion, and is flexible. The display portion has a function of displaying an image. The operation circuit portion includes a circuit having a function of outputting a signal to the display portion and a wiring for electrically connecting the circuit and the terminals, and is located in an area adjacent to the display portion. The terminals are electrically connected to the external electrodes. The external electrodes have a function of transmitting a signal output from the drive circuit to the operation circuit portion. The transparent portion transmits visible light. including the area that does not overlap with the operation circuit and is located in the area adjacent to one side of the display unit, and the first portion includes the area between the terminal and the display unit in the display panel. The display panel has a transparent part between the surface on which the display unit displays an image and the surface opposite to the first surface of the plate, and a part of the display unit is fixed so as to protrude from the plate, and the first portion is arranged along the convex curved surface. The display device is such that one display unit of two display panels overlaps with the other transparent part. The surface of the display panel that faces the surface on which the display unit displays an image and the second surface that faces the first surface of the plate are transparent, and a part of the display unit is fixed so as to protrude from the plate, and the first portion is arranged along the convex curved surface. The display device is such that one display unit of two display panels overlaps with the other transparent part. A part of the display unit is fixed so as to protrude from the plate, and the first portion is arranged along the convex curved surface. The display device is such that one display unit of two display panels overlaps with the other transparent part. A display device in which one display unit of two display panels overlaps with the other transparent part.

[0012] Also, the above display device includes a video signal splitter and video output means. The video output means has a function of outputting a video signal or an image signal to the video signal splitter, and the video signal splitter has a function of splitting the input video signal or image signal into a plurality of signals and outputting them to the drive circuit. Such a display device is also an aspect of the present invention. The video output means has a function of outputting a video signal or an image signal to the video signal splitter, and the video signal splitter has a function of splitting the input video signal or image signal into a plurality of signals and outputting them to the drive circuit. Such a display device is also an aspect of the present invention. The video signal splitter has a function of splitting the input video signal or image signal into a plurality of signals and outputting them to the drive circuit. Such a display device is also an aspect of the present invention. A display device having a function of splitting the input video signal or image signal into a plurality of signals and outputting them to the drive circuit is also an aspect of the present invention.

[0013] Also, in the above display device, the transparent part is located in an area that does not overlap with the operation circuit and is adjacent to two sides of the display unit, and the first part of one of the two display panels overlaps with the first part of the other. Such a display device is also an aspect of the present invention. The transparent part is located in an area that does not overlap with the operation circuit and is adjacent to two sides of the display unit, and the first part of one of the two display panels overlaps with the first part of the other. Such a display device is also an aspect of the present invention. A display device in which the first part of one of the two display panels overlaps with the first part of the other is also an aspect of the present invention.

[0014] Also, in the above display device, it is preferable that the drive circuit has a function of adjusting the color tone, brightness, etc. of the image or video displayed by the display panel. It is preferable that the drive circuit has a function of adjusting the color tone, brightness, etc. of the image or video displayed by the display panel.

[0015] Also, the above display device, the display unit includes a plurality of pixels, the plurality of pixels include a light-emitting element and a transistor, and the light-emitting element includes a lower electrode, an upper electrode, and an EL layer sandwiched between the lower electrode and the upper electrode. Such a display device is also an aspect of the present invention. The plurality of pixels include a light-emitting element and a transistor, and the light-emitting element includes a lower electrode, an upper electrode, and an EL layer sandwiched between the lower electrode and the upper electrode. Such a display device is also an aspect of the present invention. A display device in which the light-emitting element includes a lower electrode, an upper electrode, and an EL layer sandwiched between the lower electrode and the upper electrode is also an aspect of the present invention.

[0016] Also, in the above display device, the display unit includes auxiliary electrodes, and the auxiliary electrodes are in contact with the upper electrode between adjacent pairs of lower electrodes. This display device is also an aspect of the present invention. A display device in which the auxiliary electrodes are in contact with the upper electrode between adjacent pairs of lower electrodes is also an aspect of the present invention.

Advantages of the Invention

[0017] According to one aspect of the present invention, a display device suitable for increasing the size can be provided. Or, according to one aspect of the present invention, a display device with reduced display unevenness can be provided. Or, according to one aspect of the present invention, a display device capable of providing a uniform display within the display surface can be provided. Or, according to one aspect of the present invention, a display device capable of providing a display in which seams are hardly recognized within the display surface can be provided. Or, a novel display device can be provided. Note that the description of these effects does not prevent the existence of other effects. Note that one aspect of the present invention does not necessarily have all of these effects. Note that other effects will be apparent from the descriptions in the specification, drawings, claims, etc., and it is possible to extract these other effects from the descriptions in the specification, drawings, claims, etc. Or, a novel display device can be provided. Note that the description of these effects does not prevent the existence of other effects. Note that one aspect of the present invention does not necessarily have all of these effects. Note that other effects will be apparent from the descriptions in the specification, drawings, claims, etc., and it is possible to extract these other effects from the descriptions in the specification, drawings, claims, etc. Or, a novel display device can be provided. Note that the description of these effects does not prevent the existence of other effects. Note that one aspect of the present invention does not necessarily have all of these effects. Note that other effects will be apparent from the descriptions in the specification, drawings, claims, etc., and it is possible to extract these other effects from the descriptions in the specification, drawings, claims, etc. Or, a novel display device can be provided. Note that the description of these effects does not prevent the existence of other effects. Note that one aspect of the present invention does not necessarily have all of these effects. Note that other effects will be apparent from the descriptions in the specification, drawings, claims, etc., and it is possible to extract these other effects from the descriptions in the specification, drawings, claims, etc.

[0018] Or, a novel display device can be provided. Note that the description of these effects does not prevent the existence of other effects. Note that one aspect of the present invention does not necessarily have all of these effects. Note that other effects will be apparent from the descriptions in the specification, drawings, claims, etc., and it is possible to extract these other effects from the descriptions in the specification, drawings, claims, etc. Or, a novel display device can be provided. Note that the description of these effects does not prevent the existence of other effects. Note that one aspect of the present invention does not necessarily have all of these effects. Note that other effects will be apparent from the descriptions in the specification, drawings, claims, etc., and it is possible to extract these other effects from the descriptions in the specification, drawings, claims, etc. Or, a novel display device can be provided. Note that the description of these effects does not prevent the existence of other effects. Note that one aspect of the present invention does not necessarily have all of these effects. Note that other effects will be apparent from the descriptions in the specification, drawings, claims, etc., and it is possible to extract these other effects from the descriptions in the specification, drawings, claims, etc. Or, a novel display device can be provided. Note that the description of these effects does not prevent the existence of other effects. Note that one aspect of the present invention does not necessarily have all of these effects. Note that other effects will be apparent from the descriptions in the specification, drawings, claims, etc., and it is possible to extract these other effects from the descriptions in the specification, drawings, claims, etc. Or, a novel display device can be provided. Note that the description of these effects does not prevent the existence of other effects. Note that one aspect of the present invention does not necessarily have all of these effects. Note that other effects will be apparent from the descriptions in the specification, drawings, claims, etc., and it is possible to extract these other effects from the descriptions in the specification, drawings, claims, etc.

Brief Description of the Drawings

[0019]

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Mode for Carrying Out the Invention

[0020] The embodiments will be described in detail with reference to the drawings. However, the present invention is not limited to the following description, and those skilled in the art can easily understand that the form and details can be variously changed without departing from the spirit and scope of the present invention. Therefore, the present invention is not construed as being limited to the description of the embodiments shown below.

[0021] In the configuration of the invention described below, the same part or parts having the same function are commonly used with the same reference numerals among different drawings, and the repeated description thereof is omitted. Also, when referring to the same function, the hatching pattern may be the same and may not be particularly labeled.

[0022] In each of the drawings described in this specification, the size of each component, the thickness of the layer, or the area may be exaggerated for clarity. Therefore, it is not necessarily limited to that scale.

[0023] Note that ordinal numbers such as "first" and "second" in this specification, etc., are used to avoid confusion of components ​This is for reference purposes only and is not intended to be numerically limiting.

[0024] In addition, in this specification, when it is described that A has a shape protruding more than B, in the top view or cross-sectional view, it may indicate that at least one end of A is outside at least one end of B. That is, it has a shape like this.

[0025] Note that the term "film" and the term "layer" may be interchangeable depending on the case or situation. For example, the term "conductive layer" may be changed to the term "conductive film". Or, for example, the term "insulating film" may be changed to the term "insulating layer". That is, there may be cases where it is possible to make such a change.

[0026] (Embodiment 1) In this embodiment, a configuration example of a display device according to one aspect of the present invention will be described with reference to the drawings. That is, it will be described.

[0027] Two display panels included in a display device according to one aspect of the present invention are provided with a transparent portion adjacent to one side of the display portion. The display portion has a function of displaying an image, and the transparent portion transmits the light emitted by the display portion. By arranging the two display panels so as to overlap each other, and arranging the transparent portion of one display panel and the display portion of the other display panel so as to overlap, the display device can perform seamless large-screen display. That is, the display device can perform seamless large-screen display. That is, the display device can perform seamless large-screen display. That is, the display device can perform seamless large-screen display.

[0028] Hereinafter, each configuration of the display device will be described in detail.

[0029] Fig. 1(A) shows a front view of the display device 20A, and Fig. 1(B) shows a cross-sectional view of the display device 20A corresponding to the dashed line Y1-Y2 in Fig. 1(A). That is, Fig. 1(B) shows a cross-sectional view of the display device 20A corresponding to the dashed line Y1-Y2 in Fig. 1(A).

[0030] The display device 20A includes two each of a display panel 40, a plate 50, a stage 61, a drive circuit 62, an adjustment means 63, and includes a frame 21A.

[0031] In the elements that the display device 20A has two of, a is appended after one of the symbols respectively, and b is appended after the other symbol. Also, for matters common to the two elements in the following description, the symbol may not have a or b appended after it. This notation is also carried out in the same way for the elements that the display device 10 and the display device 20B have two of, which will be described later.

[0032] Also, the display device 20A with the plate 50 and the display panel 40 removed is shown in FIGS. 2(A) and 2(B). FIG. 2(A) shows a front view of the display device 20A, and FIG. 2(B) shows a cross-sectional view of the display device 20A corresponding to the dashed-dotted line Y3 - Y4 in FIG. 2(A). FIG. 2(A) includes elements and symbols of the display device 20A that are not shown in FIG. 1(A).

[0033] In the display device 20A, a part of the display panel 40 is curved and attached to the plate 50 (see FIG. 1(B)). An upper view of the display panel 40 placed flat as a single unit is shown in FIG. 1(C).

[0034] The display device 20A can display an image or video as a single display area by arranging the display portions 41a of the display panel 40a and the display portions 41b of the display panel 40b without a seam. The display portion 11A is the area surrounded by the thick dashed line in FIG. 1(A).

[0035] The frame 21A includes a plurality of columns and a plurality of beams. Also, the frame 21A has two ​​The adjustment means 63 can be installed. In the present embodiment, the adjustment means 63 is fixed to the beam of the frame 21 A (see Fig. 2(A)).

[0036] As the frame 21A, a metal material with good workability and low deformability can be used . Examples of the metal material include aluminum, copper, manganese, magnesium, and their alloys (aluminum alloys), or iron, chromium, nickel, and their alloys (stainless steel ).

[0037] The adjustment means 63 has a function of adjusting the position and angle of the stage 61 fixed to the upper part of the adjustment means 63 . Specifically, the adjustment means 63 moves the position of the display panel 40 connected to the stage 61 in the X-axis direction or / and the Y-axis direction, and rotates around the Z-axis axis.

[0038] The position of the display panel 40 can be adjusted by the adjustment means 63 so that one display portion 41a of the two display panels 40 and the other display portion 41 b are arranged without a gap and in parallel.

[0039] As the adjustment means 63, for example, a one-axis stage for performing position adjustment in the X-axis direction in Fig. 1(B) ( also referred to as an X-axis stage), a one-axis stage for performing position adjustment in the Y-axis direction (also referred to as a Y-axis stage), and an inclination stage for performing position adjustment in the direction of rotation around the Z-axis (also referred to as a gonio stage) can be used in combination. Alternatively, a two-axis stage for performing position adjustment in the X-axis direction and the Y-axis direction and an inclination stage can be used in combination. In the present embodiment , from the side fixed to the frame 21A, an X-axis stage, a Y-axis stage, and a gonio stage ​​Combining the dies to form the adjustment means 63 (see FIGS. 2(A) and 2(B)).

[0040] The drive circuit 62 has a function of converting the image and video signals input to the drive circuit 62 into signals for driving the display panel 40 and outputting them to the display panel 40. Further, the drive circuit 62 has a function of supplying the power supply voltage required for the light emission of the display panel 40.

[0041] In addition, if the drive circuit 62 has a function of adjusting the color tone, brightness, etc. in the display of the display panel 40, it is preferable because variations in display performance between the display panel 40a and the display panel 40b can be corrected.

[0042] The drive circuit 62 may have a function of generating image and video signals. Also, a cable 64 may be connected to the drive circuit 62. For example, a signal can be input to the drive circuit 62 from an external video output device through the cable 64 (see FIG. 2(B)).

[0043] FIG. 3(A) shows a side view of the display device 10 according to an aspect of the present invention. The display device 10 includes a display device 20A, a video signal splitter 22, and a video output means 23. In the display device 10, for example, the frame 21 includes the frame 21A and has a plurality of bottom plates on which the video signal splitter 22 and the video output means 23 are installed. As the frame 21, the same metal material as the frame 21A can be used.

[0044] In the display device 10, the drive circuit 62a and the drive circuit 62b are electrically connected to the video signal splitter 22 by the cables 64a and 64b, respectively. Also, the video... ​​​​​​​​​​​The video signal splitter 22 is electrically connected to the video output means 23 by a cable 65. In Fig. 3(A), the display panel 40, the plate 50, and the stage 61 are grouped together as an element group 60 (60a, 60b).

[0045] The video output means 23 has a function of outputting the signals of the images and videos displayed on the display panels 40a and 40b to the video signal splitter 22. As the video output means 23, for example, a Blu-ray disc recorder or a DVD (Digital Versatile Disc) disc recorder can be used.

[0046] Also, when configuring a display device by arranging a plurality of display panels in a tiled manner, as the video output means 23, a non-compressed disc recorder (also referred to as UDR: Uncompressed Disk Recorder) that can output an image with a high screen resolution such as 4K (number of pixels 3840×2160) or 8K (number of pixels 7680×4320) without compression can be preferably used. The number of display panels arranged in a tiled manner can be, for example, 9 (3×3) or 36 (6×6 ).

[0047] The video signal splitter 22 has a function of splitting the input image or video signal and outputting it to a plurality of drive circuits and display devices.

[0048] For example, when an image signal with a certain screen resolution is divided into 9 equal parts by the video signal splitter 22 and output to 9 display devices, the image displayed based on the image signal received by each individual display device at the output destination has the same pixel aspect as the original image, and the screen resolution is 1 / 9. Then arrange the display areas of the 9 display devices in order corresponding to the order in which the original image signal was divided. ​ Thus, it is possible to perform display while maintaining the screen resolution of the original image. Here, the pixel aspect ratio refers to the ratio of the vertical to the horizontal of the screen resolution of the image. Also, the screen resolution refers to the total number of pixels that make up the display section of the display device or the total number of pixels that make up the image.

[0049] In the present embodiment, the signals of the images and videos input to the video signal splitter 22 are split into two and output to two drive circuits 62.

[0050] Returning to the description of the display device 20A. The stage 61 has an area where the drive circuit 62 and the plate 50 can be arranged (see Fig. 1(B)). By having an area where the stage 61 can install the drive circuit 62 it is possible to easily replace components during specification changes or maintenance of the drive circuit 62 and the like

[0051] Note that the volume of the drive circuit 62 may be reduced and it may be attached to the surface of the stage 61 on the side opposite to the area where the plate 50 can be attached. By doing so, the area where the drive circuit 62 of the stage 61 can be installed can be reduced, and the depth of the display device 20A (the length in the Z-axis direction in Fig. 1(B)) can be reduced.

[0052] As the stage 61, a metal material similar to that of the frame 21A can be used.

[0053] The plate 50 has a mechanism for connecting to the stage 61 on the first surface and has a convex curved surface on one side surface (see Fig. 1(B)). Also, the plate 50 has an area for arranging the display panel 40 on the surface opposite to the first surface (hereinafter referred to as the second surface ) . In the present embodiment, the mechanism is the stage 6 ​​​​​It consists of a notch 51 that can be fitted with a part of 1 and a fastener 52 that slides in the Y-axis direction. , but it is not limited to this. Note that the plate 50 does not have a mechanism for connecting to the stage 61, and the stage 6 1 may be provided with a mechanism for installing the plate 50 on the stage 61.

[0054] In order to precisely adjust the relative position between the display unit 41a and the display unit 41b by the adjustment means 63, it is required to accurately connect the plate 50 to the stage 61. The alignment of the plate 50 and the stage 6 in the Y-axis direction can be performed by the notch 51 and the fastener 52. The alignment of the plate 50 and the stage 61 in the X-axis direction can be performed by, for example, a guide 53 described later. It can be performed.

[0055] As the plate 50, the same metal material as the frame 21A can be used.

[0056] The display panel 40 includes a display unit 41, a transparent unit 42, an operation circuit unit 43, terminals 45, and an external electrode 46 (see Fig. 1(C)). Further, the display panel 40 has flexibility.

[0057] The terminals 45 are electrically connected to the wiring of the operation circuit unit 43 and the external electrode 46. Also, the external electrode 46 is electrically connected to the drive circuit 62, and a signal is output from the drive circuit 62 to the display panel 40 via the external electrode 46 (see Fig. 1(B)). In this embodiment , as an example of the external electrode 46, an FPC (Flexible Printed Circui t) is used.

[0058] The display unit 41 has a function of displaying an image. Also, the display unit 41 may include a light-emitting element such as an organic EL element. It may be provided.

[0059] The operation circuit unit 43 has a function of outputting a signal to the display unit 41. For example, the operation circuit unit 4 3 includes a scanning line driving circuit and a signal line driving circuit. Also, wirings connecting the scanning line driving circuit and the signal line driving circuit to the external electrode 46 are also included in the operation circuit unit 43.

[0060] The display panel 40 includes the operation circuit unit 43 at a position adjacent to the display unit 41. In FIG. 1(C) it shows a configuration in which the operation circuit unit 43 is adjacent to two sides of the display unit 41, but the operation circuit unit 43 may be configured to be adjacent to one side of the display unit 41. Also, the operation circuit unit 43 may be an area that does not transmit visible light or an area that transmits visible light depending on the configuration such as the scanning line driving circuit, etc.

[0061] The transparent part 42 includes an area that transmits visible light. Also, the transparent part 42 is adjacent to the display unit 41 and is located in an area that does not overlap with the operation circuit unit 43.

[0062] In FIG. 1(C), an example is shown in which the transparent part 42 is located adjacent to the lower side of the display unit 41 (the side opposite to the direction where the terminal 45 is located), but it is not limited to this. For example, the transparent part 42 may be located adjacent to the right side of the display unit 41 (the side opposite to the long side among the sides of the display unit 41 adjacent to the operation circuit unit 43). Also, the transparent part 42 may be located adjacent to two sides of the display unit 41 (for example, the above-mentioned lower side and right side). When the transparent part 42 is located adjacent to two sides of the display unit 41, it is preferable because the display panels 40 can be arranged seamlessly in a tile shape. Also, by eliminating the gap between the display unit 41 and the transparent part 42, a large-screen display in which a plurality of display panels 40 are arranged in a tile shape and the seams are hardly recognized becomes possible.

[0063] 40 can be arranged seamlessly in a tile shape. Also, by eliminating the gap between the display unit 41 and the transparent part 42, a large-screen display in which a plurality of display panels 40 are arranged in a tile shape and the seams are hardly recognized becomes possible. By eliminating the gap between the display unit 41 and the transparent part 42, a large-screen display in which a plurality of display panels 40 are arranged in a tile shape and the seams are hardly recognized becomes possible. ​​​​​

[0064] When the transmittance of the transparent portion 42 is high, it is preferable because it becomes difficult to visually recognize the boundary between the region where the transparent portion 42 is in the front in the display of the display portion 41 and the other regions. Also, when the refractive index of the material constituting the transparent portion 42 is close to 1, it is preferable because external light reflection can be suppressed. When the transmittance of the transparent portion 42 is high, it is preferable because it becomes difficult to visually recognize the boundary between the region where the transparent portion 42 is in the front in the display of the display portion 41 and the other regions. Also, when the refractive index of the material constituting the transparent portion 42 is close to 1, it is preferable because external light reflection can be suppressed. When the transmittance of the transparent portion 42 is high, it is preferable because it becomes difficult to visually recognize the boundary between the region where the transparent portion 42 is in the front in the display of the display portion 41 and the other regions. Also, when the refractive index of the material constituting the transparent portion 42 is close to 1, it is preferable because external light reflection can be suppressed.

[0065] The width of the transparent portion 42 (the length in the Y-axis direction in FIG. 1(B)) is equal to the distance from the end of the display panel 40 to the side adjacent to the transparent portion 42 of the display portion 41 (see FIG. 1(C)). Also, the transparent portion 42 may include a sealing layer having a function of suppressing the intrusion of impurities such as water into the light-emitting elements included in the display portion 41. That is, the width of the transparent portion 42 can be set according to the sealing performance of the sealing layer and / or the reliability required for the light-emitting elements. The width of the transparent portion 42 (the length in the Y-axis direction in FIG. 1(B)) is equal to the distance from the end of the display panel 40 to the side adjacent to the transparent portion 42 of the display portion 41 (see FIG. 1(C)). Also, the transparent portion 42 may include a sealing layer having a function of suppressing the intrusion of impurities such as water into the light-emitting elements included in the display portion 41. That is, the width of the transparent portion 42 can be set according to the sealing performance of the sealing layer and / or the reliability required for the light-emitting elements. The width of the transparent portion 42 (the length in the Y-axis direction in FIG. 1(B)) is equal to the distance from the end of the display panel 40 to the side adjacent to the transparent portion 42 of the display portion 41 (see FIG. 1(C)). Also, the transparent portion 42 may include a sealing layer having a function of suppressing the intrusion of impurities such as water into the light-emitting elements included in the display portion 41. That is, the width of the transparent portion 42 can be set according to the sealing performance of the sealing layer and / or the reliability required for the light-emitting elements. The width of the transparent portion 42 (the length in the Y-axis direction in FIG. 1(B)) is equal to the distance from the end of the display panel 40 to the side adjacent to the transparent portion 42 of the display portion 41 (see FIG. 1(C)). Also, the transparent portion 42 may include a sealing layer having a function of suppressing the intrusion of impurities such as water into the light-emitting elements included in the display portion 41. That is, the width of the transparent portion 42 can be set according to the sealing performance of the sealing layer and / or the reliability required for the light-emitting elements. The width of the transparent portion 42 (the length in the Y-axis direction in FIG. 1(B)) is equal to the distance from the end of the display panel 40 to the side adjacent to the transparent portion 42 of the display portion 41 (see FIG. 1(C)). Also, the transparent portion 42 may include a sealing layer having a function of suppressing the intrusion of impurities such as water into the light-emitting elements included in the display portion 41. That is, the width of the transparent portion 42 can be set according to the sealing performance of the sealing layer and / or the reliability required for the light-emitting elements.

[0066] The specific configuration of the display panel will be described in detail in Embodiment 2.

[0067] Next, a configuration in which two display panels 40 are arranged in the Y-axis direction without a seam between the display portions 41a and 41b will be described with reference to FIG. 1(B). Next, a configuration in which two display panels 40 are arranged in the Y-axis direction without a seam between the display portions 41a and 41b will be described with reference to FIG. 1(B).

[0068] In FIGS. 1(A) and 1(B), the panel located behind among the two display panels (the display panel where the transparent portion 42 of another display panel overlaps the front surface of the display portion 41) is defined as the display panel 40a, and the panel located in the front is defined as the display panel 40b. Also, the positional relationship and connection relationship between the display panel 40a and the plate 50a are assumed to be the same as the positional relationship and connection relationship between the display panel 40b and the plate 50b. In FIGS. 1(A) and 1(B), the panel located behind among the two display panels (the display panel where the transparent portion 42 of another display panel overlaps the front surface of the display portion 41) is defined as the display panel 40a, and the panel located in the front is defined as the display panel 40b. Also, the positional relationship and connection relationship between the display panel 40a and the plate 50a are assumed to be the same as the positional relationship and connection relationship between the display panel 40b and the plate 50b. In FIGS. 1(A) and 1(B), the panel located behind among the two display panels (the display panel where the transparent portion 42 of another display panel overlaps the front surface of the display portion 41) is defined as the display panel 40a, and the panel located in the front is defined as the display panel 40b. Also, the positional relationship and connection relationship between the display panel 40a and the plate 50a are assumed to be the same as the positional relationship and connection relationship between the display panel 40b and the plate 50b. In FIGS. 1(A) and 1(B), the panel located behind among the two display panels (the display panel where the transparent portion 42 of another display panel overlaps the front surface of the display portion 41) is defined as the display panel 40a, and the panel located in the front is defined as the display panel 40b. Also, the positional relationship and connection relationship between the display panel 40a and the plate 50a are assumed to be the same as the positional relationship and connection relationship between the display panel 40b and the plate 50b. In FIGS. 1(A) and 1(B), the panel located behind among the two display panels (the display panel where the transparent portion 42 of another display panel overlaps the front surface of the display portion 41) is defined as the display panel 40a, and the panel located in the front is defined as the display panel 40b. Also, the positional relationship and connection relationship between the display panel 40a and the plate 50a are assumed to be the same as the positional relationship and connection relationship between the display panel 40b and the plate 50b.

[0069] In FIG. 1(B), the surface facing the surface where the display of the display portion 41 of the display panel 40 can be visually recognized (Hereinafter, it is referred to as the back surface of the display) is in contact with the second surface of the plate 50 and the convex curved surface.

[0070] The back surface of the display and the second surface may be adhered or may be detachably fixed. Since the back surface of the display and the second surface are detachable, the display panel 40 can be easily replaced. This can be done.

[0071] As a method of detachably fixing the back surface of the display and the second surface, for example, a film having adsorptivity (hereinafter referred to as an adsorption film) can be used. The adsorption film adsorbs to the adherend by removing the air between the adherend and the film and creating a low-pressure or vacuum state. Also, as a method of detachably fixing the back surface of the display and the second surface, a film having adhesiveness may be used. When using an adsorption film or a film having adhesiveness to fix the back surface of the display and the second surface, these films are first attached to the second surface. These films may be attached to the entire surface of the second surface or may be attached to a part thereof. In that case, it is preferable to attach these films to at least the region near the convex curved surface of the second surface. By adopting such a configuration, when the first portion 44 of the display panel 40 is bent along the convex curved surface, it is possible to suppress the display panel 40 near the upper side of the display portion 41 from lifting off from the second surface. In the display panel 40, the region between the terminal 45 and the display portion 41 is defined as the first portion 44 (see FIG. 1(C)). The first portion 44 is preferably arranged along the convex curved surface of the plate 50 as shown in FIG. 1(B).

[0072]

[0073]

[0074] ​​​​​​​​​​​​ Further, it is preferable that the first portion 44 and the convex curved surface are not fixed. With such a configuration, the movable range of the external electrode 46 becomes wider, and the degree of freedom in connecting the external electrode 46 and the drive circuit 62 can be increased. Also, as will be described later, the operation of arranging two display panels 80 side by side in the X-axis direction can be easily performed.

[0075] Note that the first portion 44 of the display panel 40 may be arranged along a part rather than the whole of the convex curved surface of the plate 50 as shown in FIG. 3(B). With such a configuration, the angle at which the first portion 44 is curved can be reduced, and the physical burden on the display panel 40 can be reduced.

[0076] As shown in FIG. 1(B), the display panel 40b is fixed to the plate 50b such that a part of the transparent portion 42b and the display portion 41b protrude from the plate 50b. Since a part of the display portion 41b protrudes from the plate 50b, the display portion 41b can be arranged on the display panel 40a without contacting the plate 50b and the first portion 44a.

[0077] The length in the Y-axis direction in which the display portion 41b protrudes from the plate 50b can be determined such that, for example, the upper side of the display portion 41a and the lower side of the display portion 41b overlap in the Z-axis direction.

[0078] In the portion where the transparent portion 42b and the display portion 41a are in contact, it is preferable that no air or the like is included between the transparent portion 42b and the display portion 41a. Also, it is preferable that the transparent portion 42b and the display portion 41a are detachably fixed.

[0079] As a method of detachably fixing the transparent portion 42b and the display portion 41a, for example, the above-described adsorption film A film can be used. When an adsorption film is used, it is preferable that the difference in refractive index between the material constituting the transparent portion 42b and the material constituting the adsorption film is small. With such a configuration, external light reflection at the interface between the transparent portion 42b and the adsorption film can be suppressed, and the visibility of the display of the display portion 41a located at the position overlapping the transparent portion 42b can be improved. Also, since the display panel 40 has flexibility, the plate 50a and the plate 50b can be arranged such that their second surfaces form one surface, and a part of the display panel 40b protruding from the plate 50b can be bent and disposed on the surface of the display panel 40a. By arranging the plate 50a and the plate 50b such that their second surfaces form one surface, the display surface of the display portion 11A can be configured to be substantially planar without being stepped. Hereinafter, the procedure for installing the display panels 40a and 40b in the display device 20A will be described with reference to FIGS. 1(A), (B) and FIGS. 2(A), (B).

[0080] It is assumed that the adjustment means 63a, 63b, and the stages 61a, 61b are previously installed on the frame 21A. First, the drive circuits 62a, 62b are installed on the stages 61a, 61b respectively (see FIGS. 2(A), (B)). Next, the display panel 40a is adhesively or removably fixed to the plate 50a. Specifically, the display back surface of the display panel 40a and the second surface of the plate 50a are brought into close contact with each other via an adsorption film or a film having adhesiveness. At this time, it is preferable that the first portion 44a and the convex curved surface of the plate 50a are not fixed.

[0081]

[0082]

[0083]

[0084]

[0085] The plate 50a is placed on the stage 61a. Specifically, the notch 51a is aligned with the stage 61a. and overlapping the first surface of the plate 50a with one side surface of the stage 61a so as to be in contact with the first surface of the plate 50a. Then, the fastener 52a is pulled up to fix the plate 50a to the stage 61a. , connects the external electrode 46a and the drive circuit 62a.

[0086] Next, the display panel 40b is fixed to the plate 50b. The method of fixing the display panel 40a to the plate 50a is similar to the method of fixing the display panel 40a to the plate 50a described above.

[0087] The plate 50b is placed on the stage 61b. The method of mounting the plate 50a on the stage 61a is the same as that of mounting the plate 50b on the stage 61a. The panel 40b is attached so that a part of the panel 40b is positioned in front of the display panel 40a. The lower electrode 46b is connected to the drive circuit 62b.

[0088] When the plate 50b is placed on the stage 61b, the plate 50b and the convex curved surface of the plate 50a are The stage 6 is adjusted by the adjustment means 63a so as not to come into contact with the adjacent first portion 44a. Alternatively, the stage 61b may be moved in the Y-axis direction by the adjustment means 63b. It may be moved in the Y-axis direction.

[0089] When the display unit 11A is viewed from the Z-axis direction, the seam between the display unit 41a and the display unit 41b The position or angle of the display unit 41a is adjusted by the adjustment means 63a so that the Or / and, the position or angle of the display unit 41b is adjusted by the adjustment means 63b. do.

[0090] As the relative alignment between the display unit 41a and the display unit 41b, for example, one image is displayed in the display area, and by the adjustment means 63a and / or the adjustment means 63b to make the seam of the image near the boundary between the display unit 41a and the display unit 41b less noticeable. At this time, as the image to be displayed on the display unit 11A, for example, by using an image having a striped scale that straddles the seam, the relative alignment between the display unit 41a and the display unit 41b can be easily performed.

[0091] Finally, the transparent part 42b and the display unit 41a are detachably fixed so that air does not enter the gap (see FIGS. 1(A) and 1(B)). As a method of detachably fixing, for example, an adsorption film can be used.

[0092] By the above procedure, the display panels 40a and 40b can be installed in the display device 10.

[0093] [Modification Example 1] In this embodiment, the configuration of the display device 20A in which two display panels are adjacent in the Y-axis direction has been shown. In Modification Example 1, the configuration of the display device 20B in which two display panels are adjacent in the X-axis direction is shown.

[0094] Hereinafter, only the differences between the display device 20B and the display device 20A shown in FIGS. 1(A) and 1(B) will be described.

[0095] FIG. 4(A) shows a front view of the display device 20B in which two display panels 80a and 80b are arranged in the X-axis direction, and FIG. 4(B) shows a cross-sectional view of the display device 20B corresponding to the dashed line Y5-Y6 in FIG. 4(A). In FIGS. 4(A) and 4(B), among the two display panels ​​​​​​​​ The panel located at the rear is the display panel 80a, and the panel located at the front is the display panel 80b, and so on.

[0096] In the display device 20B, a part of the display panel 80 is curved and attached to the plate 90 (see Fig. 4(B)). Fig. 4(C) shows a top view of the display panel 80 in a state where it is placed flat alone. Shown in

[0097] Also, the display device 20B with the plate 90 and the display panel 80 removed is shown in Figs. 5(A) and 5(B). Fig. 5(A) shows a front view of the display device 20B, and Fig. 5(B) shows a cross-sectional view of the display device 20B corresponding to the dashed line Y7 - Y8 in Fig. 5(A). Fig. 5(A) includes elements and reference numerals of the display device 20B that are not shown in Fig. 4(A). Shown in are.

[0098] The display device 20B can display images and videos in the display unit 11B as one display area by arranging the display units 41a of the display panel 80a and the display units 41 b of the display panel 80b without a gap. The display unit 11B is the area surrounded by the thick dashed line in Fig. 4(A). Shown in

[0099] The frame 21B is different from the frame 21A shown in Fig. 2(A) in that it has a plurality of columns and beams so that two display panels 80 can be arranged side by side in the X-axis direction (see Fig. 5(A)).

[0100] Fig. 4(D) shows a rear view of the stage 91 and the plate 90 with the plate 90 installed on the stage 91. The stage 91 has a smaller width (length in the X-axis direction) at the lower part of the area where the plate 90 is installed than at the upper part of the area where the plate 90 is installed, compared with the stage 61. Shown in is. Further, the plate 90 is provided with guides 53 on the first surface, and the distance between the two guides 53 is equal to the width W1 of the lower part of the stage 91 described above. With such a configuration, when attaching the plate 90 to the stage 91, alignment in the X-axis direction can be performed with high precision. For the frame 21B and the stage 91, the same metal material as that of the frame 21A can be used. Also, different materials may be used for the frame 21B and the stage 91. For the frame 21B and the stage 91, the same metal material as that of the frame 21A can be used. Also, different materials may be used for the frame 21B and the stage 91.

[0101] For the frame 21B and the stage 91, the same metal material as that of the frame 21A can be used. Also, different materials may be used for the frame 21B and the stage 91. For the frame 21B and the stage 91, the same metal material as that of the frame 21A can be used. Also, different materials may be used for the frame 21B and the stage 91.

[0102] The display panel 80 includes a transparent portion 82 at positions adjacent to the right side and the lower side of the display portion 41 (see FIG. 4(C)). As shown in FIG. 4(A), in the display device 20B, the display portion 41a and the transparent portion 82b overlap. Also, the first portion 44a of the display panel 80a and the first portion 44b of the display panel 80b overlap. With such a configuration, a plurality of display panels 80 can be arranged without a gap in the display portion 41 in the X-axis direction and the Y-axis direction, enabling a large-area display. For the method of arranging the display panels 80 in the Y-axis direction, reference can be made to FIGS. 1(A), (B) and the description in this specification corresponding to FIGS. 1(A), (B). (See FIG. 4(C)). As shown in FIG. 4(A), in the display device 20B, the display portion 41a and the transparent portion 82b overlap. Also, the first portion 44a of the display panel 80a and the first portion 44b of the display panel 80b overlap. With such a configuration, a plurality of display panels 80 can be arranged without a gap in the display portion 41 in the X-axis direction and the Y-axis direction, enabling a large-area display. For the method of arranging the display panels 80 in the Y-axis direction, reference can be made to FIGS. 1(A), (B) and the description in this specification corresponding to FIGS. 1(A), (B). (See FIG. 4(C)). As shown in FIG. 4(A), in the display device 20B, the display portion 41a and the transparent portion 82b overlap. Also, the first portion 44a of the display panel 80a and the first portion 44b of the display panel 80b overlap. With such a configuration, a plurality of display panels 80 can be arranged without a gap in the display portion 41 in the X-axis direction and the Y-axis direction, enabling a large-area display. For the method of arranging the display panels 80 in the Y-axis direction, reference can be made to FIGS. 1(A), (B) and the description in this specification corresponding to FIGS. 1(A), (B). (See FIG. 4(C)). As shown in FIG. 4(A), in the display device 20B, the display portion 41a and the transparent portion 82b overlap. Also, the first portion 44a of the display panel 80a and the first portion 44b of the display panel 80b overlap. With such a configuration, a plurality of display panels 80 can be arranged without a gap in the display portion 41 in the X-axis direction and the Y-axis direction, enabling a large-area display. For the method of arranging the display panels 80 in the Y-axis direction, reference can be made to FIGS. 1(A), (B) and the description in this specification corresponding to FIGS. 1(A), (B). (See FIG. 4(C)). As shown in FIG. 4(A), in the display device 20B, the display portion 41a and the transparent portion 82b overlap. Also, the first portion 44a of the display panel 80a and the first portion 44b of the display panel 80b overlap. With such a configuration, a plurality of display panels 80 can be arranged without a gap in the display portion 41 in the X-axis direction and the Y-axis direction, enabling a large-area display. For the method of arranging the display panels 80 in the Y-axis direction, reference can be made to FIGS. 1(A), (B) and the description in this specification corresponding to FIGS. 1(A), (B). (See FIG. 4(C)). As shown in FIG. 4(A), in the display device 20B, the display portion 41a and the transparent portion 82b overlap. Also, the first portion 44a of the display panel 80a and the first portion 44b of the display panel 80b overlap. With such a configuration, a plurality of display panels 80 can be arranged without a gap in the display portion 41 in the X-axis direction and the Y-axis direction, enabling a large-area display. For the method of arranging the display panels 80 in the Y-axis direction, reference can be made to FIGS. 1(A), (B) and the description in this specification corresponding to FIGS. 1(A), (B). (See FIG. 4(C)). As shown in FIG. 4(A), in the display device 20B, the display portion 41a and the transparent portion 82b overlap. Also, the first portion 44a of the display panel 80a and the first portion 44b of the display panel 80b overlap. With such a configuration, a plurality of display panels 80 can be arranged without a gap in the display portion 41 in the X-axis direction and the Y-axis direction, enabling a large-area display. For the method of arranging the display panels 80 in the Y-axis direction, reference can be made to FIGS. 1(A), (B) and the description in this specification corresponding to FIGS. 1(A), (B).

[0103] The display panel 80b is fixed to the plate 90b such that a part of the transparent portion 82b and the display portion 41b protrude from the plate 90b in the X-axis direction and the Y-axis direction (see FIG. 4(A)). (See FIG. 4(A)). The length in the X-axis direction in which the display portion 41b protrudes from the plate 90b can be determined, for example, such that the right side of the display portion 41b and the left side of the display portion 41a overlap in the Z-axis direction.

[0104] (See FIG. 4(A)). The length in the X-axis direction in which the display portion 41b protrudes from the plate 90b can be determined, for example, such that the right side of the display portion 41b and the left side of the display portion 41a overlap in the Z-axis direction. (See FIG. 4(A)). The length in the X-axis direction in which the display portion 41b protrudes from the plate 90b can be determined, for example, such that the right side of the display portion 41b and the left side of the display portion 41a overlap in the Z-axis direction.

[0105] ​​Next, the procedure for installing the display panels 80a and 80b in the display device 20B will be described with reference to FIGS. 4( A) to (D) and FIGS. 5(A) and (B).

[0106] It is assumed that the adjustment means 63a and 63b and the stages 91a and 91b are already installed on the frame 21B First, the drive circuits 62a and 62b are installed on the stages 91a and 91b respectively (see FIGS. 5(A) and (B)).

[0107] Next, the display panel 80a is adhesively or removably fixed to the plate 90a. Specifically, the display back surface of the display panel 80a and the second surface of the plate 90a are brought into close contact with each other via a suction film or a film having adhesiveness At this time, it is preferable that the first portion 44a and the convex curved surface of the plate 90a are not fixed .

[0108] The plate 90a is installed on the stage 91a. Specifically, the notch 51a is fitted into a part of the stage 91 a, and the plate 90a is moved in the X-axis direction to a position where the lower part of the stage 91a is sandwiched between the two guides 53a . Then, the first surface of the plate 90a and the side surface of the stage 91a are overlapped so as to be in contact with each other, and the fastener 52a is pulled up to fix the plate 90a to the stage 91a . And the external electrode 46a and the drive circuit 62a are connected

[0109] Next, the display panel 80b is fixed to the plate 90b. The method of fixing the display panel 80b to the plate 90b is the same as the method of fixing the display panel 80a to the plate 90a . Note that the convex curved surface of the plate 90b and the first portion 44b are not fixed .

[0110] The plate 90b is installed on the stage 91b. The method of installing the plate 90b on the stage 91b is also The method of mounting the plate 90a on the stage 91a is the same as that of mounting the plate 90b on the stage 91a. The display panel 80b is attached so that a part of the display panel 80b is positioned in front of the display panel 80a.

[0111] When the plate 90b is attached to the stage 91b, the plate 90b and the display panel 80a are To avoid contact, the stage 91a may be moved in the X-axis direction by the adjustment means 63a. Alternatively, the stage 91b may be moved in the X-axis direction by the adjustment means 63b.

[0112] When the display unit 11B is viewed from the Z-axis direction, the seam between the display unit 41a and the display unit 41b The position or angle of the display unit 41a is adjusted by the adjustment means 63a so that the Alternatively, the position or angle of the display unit 41b is adjusted by the adjustment means 63b.

[0113] Next, the transparent portion 82b and the display portion 41a are detachably attached to each other so that air does not get into the gap. (See Fig. 4 (A) and (B)). As a method for removably fixing, for example, an adsorption filter is used. Room can be used.

[0114] Finally, the first portion 44b is aligned along the convex curved surface of the plate 90a and the first portion 44a. In this manner, the external electrode 46b and the drive circuit 62b are connected.

[0115] In addition, since the first portion 44a and the first portion 44b overlap each other, the bending of the curved portion The radius of curvature of the first portion 44b is larger than that of the first portion 44a. The length of the external electrode 46 required to connect the external electrode 46a to the drive circuit 62 is longer than that of the external electrode 46b. The external electrode 46b is longer than the external electrode 46b (see FIG. 4A). When connecting to 2b, excessive tension may be applied to the external electrode 46b or the terminal 45b. Therefore, it is preferable to adjust the length in the longitudinal direction of the display panel 80b of the external electrode 46b or the first portion 44b. Also, the connection position between the drive circuit 62b and the external electrode 46b may be adjusted.

[0116] [Configuration Example of Display Unit] Subsequently, a configuration example of the display unit of the display panel included in the display device according to one aspect of the present invention will be described. In FIG. 6(A), a top view of a display panel 30 in which the transparent portion 32 is adjacent to two sides of the display unit 41 is shown. FIG. 6(B) is an enlarged top view of the region P in FIG. 6(A), and FIG. 6(C) is an enlarged top view of the region Q.

[0117] As shown in FIG. 6(C), a plurality of pixels 31 are arranged in a matrix in the display unit 41. In the case of a display panel 30 capable of full-color display using three colors of red, blue, and green, the pixel 31 is a pixel capable of displaying any one of the above three colors. Alternatively, a pixel capable of displaying white or yellow in addition to the above three colors may be provided. The region including the pixel 31 corresponds to the display unit 41.

[0118] A wiring 34c and a wiring 34d are electrically connected to one pixel 31. Each of the plurality of wirings 34c intersects the wiring 34d and is electrically connected to the operation circuit 33c. Also, the plurality of wirings 34d are electrically connected to the operation circuit 33d. One of the operation circuit 33c and the operation circuit 33d can be a circuit that functions as a scanning line drive circuit, and the other can be a circuit that functions as a signal line drive circuit. Note that either one or both of the operation circuit 33c and the operation circuit 33d may not be provided.​​

[0119] In FIG. 6(B), a plurality of wirings 35 are provided that are electrically connected to the operation circuit 33c or the operation circuit 33d. The wiring 35 is electrically connected to the external electrode 46 in a region not shown and has a function of supplying an external signal to the operation circuit 33c and the operation circuit 33d.

[0120] In FIG. 6(B), the region including the operation circuit 33c, the operation circuit 33d, and the plurality of wirings 35 corresponds to the operation circuit portion 43 in FIG. 6(A).

[0121] In FIG. 6(C), the region outside the outermost provided pixel 31 corresponds to the transparent portion 32. The transparent portion 32 does not have members that block visible light such as the pixel 31, the wiring 34c, and the wiring 34d. When a part of the pixel 31, the wiring 34c, or the wiring 34d has light transmissivity with respect to visible light, it may extend to the transparent portion 32. has. transparent. If it has light transmissivity with respect to visible light, it may be provided so as to extend to the transparent portion 32.

[0122] Here, the width W2 of the transparent portion 32 may refer to the narrowest width among the transparent portions 32 provided in the display panel 30. When the width W2 of the display panel 30 varies depending on the location, the shortest length can be set as the width W2. In FIG. 6(C), the case where the distance from the pixel 31 to the end face of the substrate (that is, the width W2 of the transparent portion 32) is the same in the vertical and horizontal directions of the drawing is shown. shown. shown. shown.

[0123] FIG. 6(D) is a cross-sectional view taken along the dashed-dotted line X1-X2 in FIG. 6(C). The display panel 30 shown in FIG. 6(D) has a pair of substrates (substrate 36, substrate 37) that are each light transmissive with respect to visible light. The substrate 36 and the substrate 37 are adhered by an adhesive layer 38. The drawing picture The element 31, the wiring 34d, etc. are formed on the substrate 36.

[0124] As shown in FIGS. 6(C) and (D), when the pixel 31 is located at the outermost end of the display unit 41 , the width W2 of the transparent portion 42 is the length from the end of the substrate 36 or the substrate 37 to the end of the pixel 31 .

[0125] Note that the end of the pixel 31 refers to the end of the member that blocks visible light included in the pixel 31 and is located at the outermost position. Alternatively, when a light-emitting element (also referred to as an organic EL element) including a layer containing a light-emitting organic compound between a pair of electrodes is used as the pixel 31, the end of the pixel 31 may be any of the end of the lower electrode, the end of the layer containing the light-emitting organic compound, and the end of the upper electrode. .

[0126] FIG. 7(A) shows a case where the position of the wiring 34c is different from that in FIG. 6(C). FIG. 7(B) is a cross-sectional view taken along the dashed-dotted line Y9 - Y10 in FIG. 7(A), and FIG. 7(C) is a cross-sectional view taken along the dashed-dotted line X3 - X4 in FIG. 7(A).

[0127] As shown in FIGS. 7(A), (B), and (C), when the wiring 34c is located at the outermost end of the display unit 41 , the width W2 of the transparent portion 32 is the length from the end of the substrate 36 or the substrate 37 to the end of the wiring 34c. When the wiring 34c has light transmittance with respect to visible light, the region where the wiring 34c is provided may be included in the transparent portion 32.

[0128] Here, when the density of the pixels provided in the display unit 41 of the display panel 30 is high, misalignment may occur when two display panels 30 are bonded together.

[0129] Figure 8(A) shows the positional relationship between the display section 41a of the display panel 30a provided at the rear and the display section 41b of the display panel 30b provided at the front, as viewed from the display surface side. It is a diagram showing the positional relationship between the display section 41a of the display panel 30a provided at the rear and the display section 41b of the display panel 30b provided at the front, as viewed from the display surface side. Figure 8(A) shows near the respective corners of the display section 41a and the display section 41b. A part of the display section 41a is covered by the transparent section 32b.

[0130] In the example shown in Figure 8(A), it shows the case where the adjacent pixels 31a and 31b are relatively shifted in one direction (X-axis direction). The arrow shown in the figure indicates the direction in which the display panel 30a is shifted with respect to the display panel 30b. Also, in the example shown in Figure 8(B), it shows the case where the adjacent pixels 31a and 31b are relatively shifted in both the vertical direction and the horizontal direction (X-axis direction and Y-axis direction). In the example shown in Figure 8(A), it shows the case where the adjacent pixels 31a and 31b are relatively shifted in one direction (X-axis direction). In the example shown in Figure 8(B), it shows the case where the adjacent pixels 31a and 31b are relatively shifted in both the vertical direction and the horizontal direction (X-axis direction and Y-axis direction). It shows the case where the adjacent pixels 31a and 31b are relatively shifted in both the vertical direction and the horizontal direction (X-axis direction and Y-axis direction).

[0131] In the examples shown in Figure 8(A) and Figure 8(B), the distance shifted in the horizontal direction and the distance shifted in the vertical direction are both smaller than one pixel. In such a case, it is possible to maintain the display quality by applying correction according to the distance of the shift to the image data of the image to be displayed on either the display section 41a or the display section 41b. Specifically, in the case of a shift where the distance between pixels becomes smaller, correct so as to lower the gradation (luminance) of the pixels, and in the case of a shift where the distance between pixels becomes larger, correct so as to increase the gradation (luminance) of the pixels. Also, in the case of a shift where there is an overlap of one pixel or more, correct by shifting the image data by one column so as not to drive the pixels located at the rear. Specifically, in the case of a shift where the distance between pixels becomes smaller, correct so as to lower the gradation (luminance) of the pixels, and in the case of a shift where the distance between pixels becomes larger, correct so as to increase the gradation (luminance) of the pixels. Also, in the case of a shift where there is an overlap of one pixel or more, correct by shifting the image data by one column so as not to drive the pixels located at the rear. Specifically, in the case of a shift where the distance between pixels becomes smaller, correct so as to lower the gradation (luminance) of the pixels, and in the case of a shift where the distance between pixels becomes larger, correct so as to increase the gradation (luminance) of the pixels. Also, in the case of a shift where there is an overlap of one pixel or more, correct by shifting the image data by one column so as not to drive the pixels located at the rear. Specifically, in the case of a shift where the distance between pixels becomes smaller, correct so as to lower the gradation (luminance) of the pixels, and in the case of a shift where the distance between pixels becomes larger, correct so as to increase the gradation (luminance) of the pixels. Also, in the case of a shift where there is an overlap of one pixel or more, correct by shifting the image data by one column so as not to drive the pixels located at the rear. Specifically, in the case of a shift where the distance between pixels becomes smaller, correct so as to lower the gradation (luminance) of the pixels, and in the case of a shift where the distance between pixels becomes larger, correct so as to increase the gradation (luminance) of the pixels. Also, in the case of a shift where there is an overlap of one pixel or more, correct by shifting the image data by one column so as not to drive the pixels located at the rear. Specifically, in the case of a shift where the distance between pixels becomes smaller, correct so as to lower the gradation (luminance) of the pixels, and in the case of a shift where the distance between pixels becomes larger, correct so as to increase the gradation (luminance) of the pixels. Also, in the case of a shift where there is an overlap of one pixel or more, correct by shifting the image data by one column so as not to drive the pixels located at the rear. Specifically, in the case of a shift where the distance between pixels becomes smaller, correct so as to lower the gradation (luminance) of the pixels, and in the case of a shift where the distance between pixels becomes larger, correct so as to increase the gradation (luminance) of the pixels. Also, in the case of a shift where there is an overlap of one pixel or more, correct by shifting the image data by one column so as not to drive the pixels located at the rear.

[0132] In Figure 8(C), the pixels 31a and 31b that should originally be adjacent are relatively shifted in one direction. An example of a shift by a distance of one pixel or more in the direction (X-axis direction) is shown. In this way, when a shift of a distance of one pixel or more occurs, the protruding pixel (the pixel with hatching added) may not be displayed. The same applies when the direction of the shift is the Y-axis direction. When a shift of a distance of one pixel or more occurs, the driving may be performed so as not to display the protruding pixel (the pixel with hatching added). The same applies when the direction of the shift is the Y-axis direction. .

[0133] When overlapping a plurality of display panels 30, it is preferable to provide markers or the like for alignment on each display panel 30 so as to suppress misalignment. Alternatively, convex portions and concave portions may be formed on the surface of the display panel 30, and the convex portions and the concave portions may be fitted in a region where two display panels 30 overlap. When overlapping a plurality of display panels 30, it is preferable to provide markers or the like for alignment on each display panel 30 so as to suppress misalignment. Alternatively, convex portions and concave portions may be formed on the surface of the display panel 30, and the convex portions and the concave portions may be fitted in a region where two display panels 30 overlap. When overlapping a plurality of display panels 30, it is preferable to provide markers or the like for alignment on each display panel 30 so as to suppress misalignment. Alternatively, convex portions and concave portions may be formed on the surface of the display panel 30, and the convex portions and the concave portions may be fitted in a region where two display panels 30 overlap. When overlapping a plurality of display panels 30, it is preferable to provide markers or the like for alignment on each display panel 30 so as to suppress misalignment. Alternatively, convex portions and concave portions may be formed on the surface of the display panel 30, and the convex portions and the concave portions may be fitted in a region where two display panels 30 overlap.

[0134] Also, in consideration of the alignment accuracy, it is preferable to arrange more pixels than the pixels to be used in advance in the display portion 41 of the display panel 30. For example, at least one of the pixel columns along the scanning lines or the pixel columns along the signal lines is provided with one or more columns, preferably three or more columns, more preferably five or more columns, in addition to the pixel columns used for display. Also, in consideration of the alignment accuracy, it is preferable to arrange more pixels than the pixels to be used in advance in the display portion 41 of the display panel 30. For example, at least one of the pixel columns along the scanning lines or the pixel columns along the signal lines is provided with one or more columns, preferably three or more columns, more preferably five or more columns, in addition to the pixel columns used for display. Also, in consideration of the alignment accuracy, it is preferable to arrange more pixels than the pixels to be used in advance in the display portion 41 of the display panel 30. For example, at least one of the pixel columns along the scanning lines or the pixel columns along the signal lines is provided with one or more columns, preferably three or more columns, more preferably five or more columns, in addition to the pixel columns used for display. Also, in consideration of the alignment accuracy, it is preferable to arrange more pixels than the pixels to be used in advance in the display portion 41 of the display panel 30. For example, at least one of the pixel columns along the scanning lines or the pixel columns along the signal lines is provided with one or more columns, preferably three or more columns, more preferably five or more columns, in addition to the pixel columns used for display. Also, in consideration of the alignment accuracy, it is preferable to arrange more pixels than the pixels to be used in advance in the display portion 41 of the display panel 30. For example, at least one of the pixel columns along the scanning lines or the pixel columns along the signal lines is provided with one or more columns, preferably three or more columns, more preferably five or more columns, in addition to the pixel columns used for display.

[0135] This embodiment can be appropriately combined with other embodiments.

[0136] (Embodiment 2) In this embodiment, a configuration example of a display panel applicable to a display device according to an aspect of the present invention will be described with reference to the drawings. In this embodiment, a display panel mainly using an organic EL element will be exemplified, but the display panel that can be used in a display device according to an aspect of the present invention is not limited to this. In this embodiment, later

[0137] In this embodiment, a display panel mainly using an organic EL element will be exemplified, but the display panel that can be used in a display device according to an aspect of the present invention is not limited to this. In this embodiment, later In this embodiment, a display panel mainly using an organic EL element will be exemplified, but the display panel that can be used in a display device according to an aspect of the present invention is not limited to this. In this embodiment, later The light-emitting panel or display panel using other light-emitting elements and display elements exemplified can also be used in the display device of one aspect of the present invention. It can be used in the display device of this aspect.

[0138] [Configuration Example 1] Fig. 9(A) shows a plan view of the display panel, and an example of a cross-sectional view between the dashed-dotted lines A1 - A2 in Fig. 9(A) is shown in Fig. 9(C). Fig. 9(C) also shows an example of a cross-sectional view of the transparent portion 810. The display panel shown in Configuration Example 1 is a top-emission type display panel using the color filter method. In the present embodiment, the display panel has a configuration, for example, in which one color is represented by three sub-pixels of R (red), G (green), and B (blue), or a configuration in which one color is represented by four sub-pixels of R, G, B, and W (white), or a configuration in which one color is represented by four sub-pixels of R, G, B, and Y (yellow). etc. can be applied. The color elements are not particularly limited, and colors other than RGBWY may be used, for example, cyan or magenta may be used.

[0139] The display panel shown in Configuration Example 1 is a top-emission type display panel using the color filter method. In the present embodiment, the display panel has a configuration, for example, in which one color is represented by three sub-pixels of R (red), G (green), and B (blue), or a configuration in which one color is represented by four sub-pixels of R, G, B, and W (white), or a configuration in which one color is represented by four sub-pixels of R, G, B, and Y (yellow). etc. can be applied. The color elements are not particularly limited, and colors other than RGBWY may be used, for example, cyan or magenta may be used. B (blue), or a configuration in which one color is represented by four sub-pixels of R, G, B, and W (white), or a configuration in which one color is represented by four sub-pixels of R, G, B, and Y (yellow). etc. can be applied. The color elements are not particularly limited, and colors other than RGBWY may be used, for example, cyan or magenta may be used. The display panel shown in Fig. 9(A) has a transparent portion 810, a display portion 804, an operation circuit portion 806, and an FPC808. The transparent portion 810 is adjacent to the display portion 804 and is arranged along two sides of the display portion 804. The operation circuit portion 806 includes, for example, a scanning line driving circuit and a signal line driving circuit. The display panel shown in Fig. 9(A) has a transparent portion 810, a display portion 804, an operation circuit portion 806, and an FPC808. The transparent portion 810 is adjacent to the display portion 804 and is arranged along two sides of the display portion 804. The operation circuit portion 806 includes, for example, a scanning line driving circuit and a signal line driving circuit. The display panel shown in Fig. 9(A) has a transparent portion 810, a display portion 804, an operation circuit portion 806, and an FPC808. The transparent portion 810 is adjacent to the display portion 804 and is arranged along two sides of the display portion 804. The operation circuit portion 806 includes, for example, a scanning line driving circuit and a signal line driving circuit.

[0140] The display panel shown in Fig. 9(A) has a transparent portion 810, a display portion 804, an operation circuit portion 806, and an FPC808. The transparent portion 810 is adjacent to the display portion 804 and is arranged along two sides of the display portion 804. The operation circuit portion 806 includes, for example, a scanning line driving circuit and a signal line driving circuit. The display panel shown in Fig. 9(A) has a transparent portion 810, a display portion 804, an operation circuit portion 806, and an FPC808. The transparent portion 810 is adjacent to the display portion 804 and is arranged along two sides of the display portion 804. The operation circuit portion 806 includes, for example, a scanning line driving circuit and a signal line driving circuit. The display panel shown in Fig. 9(A) has a transparent portion 810, a display portion 804, an operation circuit portion 806, and an FPC808. The transparent portion 810 is adjacent to the display portion 804 and is arranged along two sides of the display portion 804. The operation circuit portion 806 includes, for example, a scanning line driving circuit and a signal line driving circuit. The display panel shown in Fig. 9(A) has a transparent portion 810, a display portion 804, an operation circuit portion 806, and an FPC808. The transparent portion 810 is adjacent to the display portion 804 and is arranged along two sides of the display portion 804. The operation circuit portion 806 includes, for example, a scanning line driving circuit and a signal line driving circuit.

[0141] The display panel shown in Fig. 9(C) has a substrate 701, an adhesive layer 703, an insulating layer 705, a plurality of transistors, a conductive layer 857, an insulating layer 815, an insulating layer 816, an insulating layer 817, a plurality of light-emitting elements, an insulating layer 821, an adhesive layer 822, a coloring layer 845, a light-shielding layer 847, an insulating layer 715, an adhesive layer 713, and a substrate 711. The display panel shown in Fig. 9(C) has a substrate 701, an adhesive layer 703, an insulating layer 705, a plurality of transistors, a conductive layer 857, an insulating layer 815, an insulating layer 816, an insulating layer 817, a plurality of light-emitting elements, an insulating layer 821, an adhesive layer 822, a coloring layer 845, a light-shielding layer 847, an insulating layer 715, an adhesive layer 713, and a substrate 711. The display panel shown in Fig. 9(C) has a substrate 701, an adhesive layer 703, an insulating layer 705, a plurality of transistors, a conductive layer 857, an insulating layer 815, an insulating layer 816, an insulating layer 817, a plurality of light-emitting elements, an insulating layer 821, an adhesive layer 822, a coloring layer 845, a light-shielding layer 847, an insulating layer 715, an adhesive layer 713, and a substrate 711. The display panel shown in Fig. 9(C) has a substrate 701, an adhesive layer 703, an insulating layer 705, a plurality of transistors, a conductive layer 857, an insulating layer 815, an insulating layer 816, an insulating layer 817, a plurality of light-emitting elements, an insulating layer 821, an adhesive layer 822, a coloring layer 845, a light-shielding layer 847, an insulating layer 715, an adhesive layer 713, and a substrate 711. 11 transmits visible light. The light-emitting elements and transistors included in the display unit 804 and the operation circuit unit 806 are sealed by the insulating layer 705, the insulating layer 715, and the adhesive layer 822. The display unit 804 has a transistor 820 and a light-emitting element 830 on the substrate 701 via the adhesive layer 703 and the insulating layer 705. The light-emitting element 830 has a lower electrode 831 on the insulating layer 817, an EL layer 833 on the lower electrode 831, and an upper electrode 835 on the EL layer 833. That is, the light-emitting element 830 includes a lower electrode 831, an upper electrode 835, and an EL layer 833 sandwiched between the lower electrode 831 and the upper electrode 835.

[0142] The lower electrode 831 is electrically connected to the source electrode or the drain electrode of the transistor 820. The end of the lower electrode 831 is covered with the insulating layer 821. The lower electrode 831 preferably reflects visible light. The upper electrode 835 transmits visible light. The display unit 804 also has a coloring layer 845 overlapping the light-emitting element 830 and a light-shielding layer 847 overlapping the insulating layer 821. The space between the light-emitting element 830 and the coloring layer 845 is filled with the adhesive layer 822. The insulating layer 815 and the insulating layer 816 have the effect of suppressing the diffusion of impurities into the semiconductor constituting the transistor. Also, it is preferable to select an insulating layer having a planarization function for the insulating layer 817 to reduce the surface unevenness caused by the transistor. Note that in the region of the display panel without transistors, it is not necessary to form the insulating layer 815 or / and the insulating layer 816. In particular, in the transparent portion 810, the insulating layer 815 or / and the insulating layer 816 may not be formed.

[0143] The lower electrode 831 is electrically connected to the source electrode or the drain electrode of the transistor 820. The end of the lower electrode 831 is covered with the insulating layer 821. The lower electrode 831 preferably reflects visible light. The upper electrode 835 transmits visible light. The display unit 804 also has a coloring layer 845 overlapping the light-emitting element 830 and a light-shielding layer 847 overlapping the insulating layer 821. The space between the light-emitting element 830 and the coloring layer 845 is filled with the adhesive layer 822. The insulating layer 815 and the insulating layer 816 have the effect of suppressing the diffusion of impurities into the semiconductor constituting the transistor. Also, it is preferable to select an insulating layer having a planarization function for the insulating layer 817 to reduce the surface unevenness caused by the transistor.

[0144] The display unit 804 also has a coloring layer 845 overlapping the light-emitting element 830 and a light-shielding layer 847 overlapping the insulating layer 821. The space between the light-emitting element 830 and the coloring layer 845 is filled with the adhesive layer 822. The insulating layer 815 and the insulating layer 816 have the effect of suppressing the diffusion of impurities into the semiconductor constituting the transistor. Also, it is preferable to select an insulating layer having a planarization function for the insulating layer 817 to reduce the surface unevenness caused by the transistor. Note that in the region of the display panel without transistors, it is not necessary to form the insulating layer 815 or / and the insulating layer 816. In particular, in the transparent portion 810, the insulating layer 815 or / and

[0145] The insulating layer 815 and the insulating layer 816 have the effect of suppressing the diffusion of impurities into the semiconductor constituting the transistor. Also, it is preferable to select an insulating layer having a planarization function for the insulating layer 817 to reduce the surface unevenness caused by the transistor. Note that in the region of the display panel without transistors, it is not necessary to form the insulating layer 815 or / and the insulating layer 816. In particular, in the transparent portion 810, the insulating layer 815 or / and the insulating layer 816 may not be formed.

[0146] Note that in the region of the display panel without transistors, it is not necessary to form the insulating layer 815 or / and the insulating layer 816. In particular, in the transparent portion 810, the insulating layer 815 or / and the insulating layer 816 may not be formed. It is preferable not to form the insulating layer 816 because the transmittance is improved. In FIG. 9, a configuration in which the insulating layer 815 is not formed in the transparent portion 8 10 is shown. For example, silicon nitride can be used as the insulating layer 815, and silicon oxynitride can be used as the insulating layer 816.

[0147] The operation circuit portion 806 has a plurality of transistors on the substrate 701 via the adhesive layer 703 and the insulating layer 705. In FIG. 9(C), one of the transistors included in the operation circuit portion 806 is shown.

[0148] By using a film with high moisture resistance for the insulating layer 705 and the insulating layer 715, it is possible to prevent impurities such as water from entering the light-emitting element 830 and the transistor 820, and the reliability of the display panel can be improved. Further, it is preferable that the display panel has a substrate to protect the surface of the display panel from physical impact. The substrate 701 is bonded to the insulating layer 705 by the adhesive layer 703. Also, the substrate 711 is bonded to the insulating layer 715 by the adhesive layer 713.

[0149] The conductive layer 857 is electrically connected to an external electrode that transmits an external signal (such as a video signal, a clock signal, a start signal, or a reset signal) or a potential to the operation circuit portion 806. Here an example in which the FPC 808 is provided as the external electrode is shown. In order to prevent an increase in the number of processes, the conductive layer 857 is preferably manufactured from the same material and in the same process as the electrodes and wirings used for the display portion and the drive circuit portion. Here, an example in which the conductive layer 857 is manufactured from the same material and in the same process as the electrode constituting the transistor 820 is shown.

[0150] In the display panel shown in FIG. 9(C), the FPC 808 is positioned on the insulating layer 715. The connector 825 is connected to the conductive layer 857 through openings provided in the insulating layer 715, the adhesive layer 822, the insulating layer 817, the insulating layer 816, and the insulating layer 815. Also, the connector 825 is connected to the FPC8 08. The FPC 808 and the conductive layer 857 are electrically connected through the connector 825. To be connected.

[0151] FIG. 10 shows an example of a cross-sectional view of a state in which two display panels shown in FIG. 9(C) are bonded together through the adhesive layer 723. Note that two display panels may be detachably fixed using a suction layer instead of the adhesive layer 723. To be fixed.

[0152] In FIG. 10, the display portion 41a (corresponding to the display portion 80 4 shown in FIG. 9(A)) and the operation circuit portion 43a (corresponding to the operation circuit portion 806 etc. shown in FIG. 9(A)) of the lower (rear) display panel, as well as the display portion 41b (corresponding to the display portion 804 shown in FIG. 9(A)) and the transparent portion 42b (corresponding to the transparent portion 810 shown in FIG. 9(A)) of the upper (front) display panel are shown. Note that the cross-sectional view shown in FIG. 10 is also an example of the overlapping portion (see FIG. 1(B)) of the two display panels 40a and 40b described in Embodiment 1. In FIG. 10, the display panel located on the upper side, which is the display surface side, has the transparent portion 810 adjacent to the display portion 804. Also, the display portion 804 of the lower display panel and the transparent portion 810 of the upper display panel

[0153] are overlapping. Therefore, the non-display area between the display areas of the two overlapping display panels can be reduced, or even eliminated. As a result, a large display device can be realized in which it is difficult for the user to recognize the seam of the display portion. 804 and adjacent thereto. Further, the display portion 804 of the lower display panel and the transparent portion 810 of the upper display panel are overlapping. Thus, the non-display area between the display areas of the two overlapping display panels can be reduced, and even eliminated. Thereby, a large display device can be realized in which it is difficult for the user to recognize the seam of the display portion. To reduce, or even eliminate. As a result, a large display device can be realized in which it is difficult for the user to recognize the seam of the display portion. To be recognized. Can be realized.

[0154] Also, in FIG. 10, an adhesive layer 723 that transmits visible light is positioned between the display portion 804 of the lower display panel and the transparent portion 810 of the upper display panel. The adhesive layer 723 preferably has a small difference in refractive index from the substrate 701 of the upper display panel and / or the substrate 711 of the lower display panel. With such a configuration, reflection at the interface due to the difference in refractive index of the laminate positioned above the display portion 804 of the lower display panel can be reduced. And it becomes possible to suppress display unevenness and brightness unevenness in a large display device.

[0155] [Configuration Example 2] FIG. 9(A) shows a plan view of the display panel, and an example of a cross-sectional view between the dashed-dotted line A1 - A2 in FIG. 9(A) is shown in FIG. 11(A). The display panel shown in Configuration Example 2 is a top emission type display panel using a color filter method, which is different from Configuration Example 1. Here, only the points different from Configuration Example 1 will be described in detail, and the points common to Configuration Example 1 will be omitted from the description. The display panel applicable to one aspect of the present invention includes a plurality of pixels and a plurality of auxiliary electrodes in the display portion. The pixel includes a light-emitting element and a transistor. The light-emitting element includes a lower electrode, an upper electrode, and an EL layer sandwiched between the lower electrode and the upper electrode. The auxiliary electrode is a display panel that contacts the upper electrode between a plurality of adjacent lower

[0156] electrodes. The display panel shown in FIG. 11(A) has a configuration in which one color is represented by four sub-pixels of R, G, B, and Y. An example of the arrangement of the R, G, B, and Y sub-pixels is shown in FIG. 11(C). The cross-sectional view of the display portion 804 in FIG. 11(A) corresponds to the portion between the dashed-dotted line Z1 - Z2 in FIG. 11(C).

[0157]

[0158] As shown in the display panel shown in FIG. 11(A), the light-emitting element 830 has an optical adjustment layer 832 between the lower electrode 831 and the E L layer 833. It is preferable to use a light-transmissive conductive material for the optical adjustment layer 832. By combining a coloring layer and a microcavity structure using an optical adjustment layer, light with high color purity can be extracted from the display device according to one aspect of the present invention. The thickness of the optical adjustment layer may be changed according to the color of each sub-pixel. In FIG. 11( A), the optical adjustment layer 832R of the sub-pixel R and the optical adjustment layer 832B of the sub-pixel B are shown.

[0159] The display panel shown in FIG. 11(A) has a spacer 823 on the insulating layer 821. By providing the spacer 823, the distance between the substrate 701 and the substrate 711 can be adjusted.

[0160] Further, the display panel shown in FIG. 11(A) has an overcoat 849 that covers the coloring layer 845 and the light-shielding layer 847. The space between the light-emitting element 830 and the overcoat 849 is filled with an adhesive layer 822.

[0161] In the display panel applicable to the display device according to one aspect of the present invention, the transparent portion is adjacent to the display portion and is arranged along the side of the display portion. Therefore, particularly in the case of a large display panel, a contact region for connecting a common upper electrode (the upper electrode 835 in the present embodiment) and wiring around the display portion to which a power supply voltage is supplied among the pixels included in the display portion is arranged in a region that does not overlap with the transparent portion. When the electrical resistance of the conductive layer constituting the upper electrode is high, there is a concern that the emission luminance of pixels far from the contact region in the display portion may decrease due to the voltage drop of the upper electrode. ​

[0162] The display panel shown in Fig. 11(A) has auxiliary electrodes 860 for suppressing the voltage drop of the upper electrode 835 between pixels. As the auxiliary electrode 860, it is preferable to use a conductive material having a lower electrical resistance than the upper electrode 835.

[0163] Also, if the conductive layer constituting the auxiliary electrode 860 is formed simultaneously with the lower electrode 831 or the like, it is preferable because the process can be shortened. In Fig. 11(A), the auxiliary electrode 860 is constituted by the same conductive material as the lower electrode 831 and the same conductive material as the optical adjustment layer 832.

[0164] Here, a method of forming the auxiliary electrode 860 will be described. Figs. 11(B) and (C) show an example of a top view of each sub-pixel of R, G, B, and Y constituting the display unit 804. Fig. 11( B) is a top view at the time when the lower electrode 831 is formed, and Fig. 11(C) is a top view at the time when the optical adjustment layer 8 32, the insulating layer 821, and the spacer 823 are formed after Fig. 11(B). Note that elements formed before forming the lower electrode 831 such as the transistor 820 are omitted in Fig. 11(B) (C).

[0165] The auxiliary electrode 860 can be arranged so as to fill the gaps between the sub-pixels. For example, it may be arranged in a mesh pattern so as to surround the lower electrode 831 provided in each sub-pixel, or may be arranged in a plurality of line shapes (also called stripe shapes) in the gaps in one direction where the lower electrodes 83 1 are adjacent.

[0166] If the auxiliary electrode 860 constituting one line is connected without being divided, the upper electrode 83 It is preferable because the electrical resistance of 5 can be further reduced. In FIG. 11(B), an example in which the conductive layer 860 a is arranged in a line shape is shown. Here, the conductive layer 860a is formed using the same conductive layer as the lower electrode 831.

[0167] The auxiliary electrode 860 is electrically connected by contacting the upper electrode 835. Therefore , when the EL layer 833 is formed by a dispensing method, the EL layer 8 33 is not formed on the auxiliary electrode 860, and the upper electrode 835 is formed on the auxiliary electrode 860, so that the auxiliary electrode 860 and the upper electrode 835 can be brought into contact with each other.

[0168] In the present embodiment, since the EL layer 833 is formed without using a dispensing mask, the EL layer is also formed on the auxiliary electrode 860. Therefore, a region where a part of the surface of the auxiliary electrode 860 is not covered by the EL layer 833 is formed, and a method of forming the upper electrode 835 so that the region is covered by the upper electrode 835 is required.

[0169] FIG. 11(D1) shows an enlarged view of the auxiliary electrode 860. The auxiliary electrode 860 has a laminated structure of a conductive layer 860a and a conductive layer 860b. Also, the area of the bottom surface of the conductive layer 860b is larger than the area of the upper surface of the conductive layer 860a, and a part of the conductive layer 860b protrudes from the conductive layer 860a to form a structure.

[0170] With such a configuration, when the EL layer 833 is formed, the conductive layer 860b serves as a shield , and the EL layer 833 is not formed on a part of the side surface of the conductive layer 860a, and the surface thereof can be exposed. Also, the upper electrode 835 is formed by a film formation method with lower anisotropy than the method of forming the EL layer 833 By forming it in this way, the upper electrode 835 is formed on the side surface of the conductive layer 860a, and the conductive layer 860a and the upper electrode 835 can be brought into contact with each other.

[0171] In the manufacturing process of the display panel, when etching the conductive layer 860a or the conductive layer 860b, the film under the conductive layer 860a may also be etched. When the region of the film in contact with the end portion of the lower surface of the conductive layer 860a is etched, it is possible to make it difficult to form the EL layer 833 on the side surface of the conductive layer 860a when forming the EL layer 833.

[0172] Fig. 11(D2) shows a cross-sectional view of the auxiliary electrode 860 when a part of the insulating layer 817b in contact with the end portion of the lower surface of the conductive layer 860a is etched. By doing so, the effect of suppressing the voltage drop of the upper electrode 835 can be enhanced as compared with Fig. 11(D 1).

[0173] In Fig. 11(C), the portion without hatching surrounded by the broken line is covered with the insulating layer 821. In other words, the region surrounded by the solid line except for the spacer 823 (a part of the optical adjustment layer 832 and a part of the conductive layer 860b) coincides with the opening formed in the insulating layer 821. Here, the same conductive layer as the optical adjustment layer 832 is used as the conductive layer 860b.

[0174] In Fig. 11(C), an opening is provided in the insulating layer 821 so that a part of the auxiliary electrode 860 disposed between the plurality of lower electrodes 831 is exposed. The size of the opening can be appropriately adjusted according to the electrical resistance of the upper electrode 835 and the area of the display portion 804. Further, the width of the auxiliary electrode 8 60, that is, the length in the direction in which the pixels are adjacent to each other with the auxiliary electrode 860 interposed therebetween can also be appropriately adjusted for the same reason. ​​​​

[0175] Here, the auxiliary electrode 860 provided on the display panel is functioning, that is, as shown in FIG. 11 (D1) or (D2), a method for confirming that the auxiliary electrode 860 is in contact with the upper electrode 835 on its side will be described below.

[0176] A wiring (hereinafter referred to as a measurement wiring) that is electrically connected to the auxiliary electrode 860 extending in a stripe shape in one direction in the display unit 804 is connected to one of the terminals (hereinafter referred to as terminal A) of the FPC 808. Also, one of the terminals of the FPC 808 that is electrically connected to the upper electrode 835 is defined as terminal B.

[0177] If the electrical resistance value between terminal A and terminal B is 100 Ω or more and 10 kΩ or less, it can be considered that the auxiliary electrode 8 60 is in contact with the upper electrode 835 in the display unit 804. Note that the lower limit of this electrical resistance value may vary depending on the materials of the auxiliary electrode 860, the upper electrode 835, and the measurement wiring materials and lengths.

[0178] By the way, in order to suppress variations in the current flowing through the light-emitting elements 830 between different pixels, a correction circuit may be provided for each pixel. Specifically, in order to suppress variations in the current flowing through the transistor 820 that connects the lower electrode 831 and the conductive layer 856 to the source electrode or the drain electrode via a plurality of transistors and / or a plurality of capacitive elements may be provided for each sub-pixel. This variation in current may be caused by variations in the film thickness of the semiconductor layer of the transistor 820. For example, as shown in FIG. 11(A) the transistors 870 and the capacitive elements 871 shown are for suppressing variations in the current flowing through the transistor 820 ​​​​​It may have a function of correcting the moon.

[0179] FIGS. 12 to 16(B) show an example of a pixel circuit to which the above correction circuit is applied.

[0180] The pixel circuit shown in FIG. 12 has six transistors (transistors M1 to M6), three capacitive elements (capacitive elements C1 to C3), and a light-emitting element 830. Further, in the pixel circuit shown in FIG. 12, wiring S1 and wiring S2, and wiring G1 to G6 are electrically connected. Note that, for transistors M1 to M6, for example, N-type polarity transistors can be used.

[0181] For example, the wiring G1 to G4 shown in FIG. 12 are electrically connected to the scanning line driving circuit in the operation circuit section 806. Also, for example, the wiring S1 shown in FIG. 12 is electrically connected to the signal line driving circuit in the operation circuit section 806. Also, for example, the wiring G5, the wiring G 6, and the wiring S2 shown in FIG. 12 are electrically connected to a constant voltage source.

[0182] For example, the transistor 820 in FIG. 11(A) can function as the transistor M6. Also, for example, the transistor 870 in FIG. 11(A) can function as any one of the transistors M1 to M5. Further, for example, the capacitive element 871 in FIG. 11(A) can function as any one of the capacitive elements C1 to C3.

[0183] The pixel circuit shown in FIG. 13(A) has six transistors (M7 to M12), a capacitive element C4, and a light-emitting element 830. Further, in the pixel circuit shown in FIG. 13(A), wiring S ​​​​​​​3, wiring S4, and wirings G7 to G11 are electrically connected. Transistors For transistors M7 to M12, for example, N-type polarity transistors can be used. Also as shown in FIG. 13(B), P-type polarity transistors (transistors M13 to M18) may be used instead of transistors M7 to M12.

[0184] The pixel circuit shown in FIG. 14(A) is a configuration in which a transistor M19 is added to the pixel circuit shown in FIG. 13(A). Also, in the pixel circuit shown in FIG. 14(A), wirings G12 and G1 3 are electrically connected. Here, wiring G11 and wiring G12 may be electrically connected to each other. For transistor M19, for example, an N-type polarity transistor can be used.

[0185] The pixel circuit shown in FIG. 14(B) is a configuration in which a transistor M20 is added to the pixel circuit shown in FIG. 13(B). Also, in the pixel circuit shown in FIG. 14(B), wirings G12 and G1 3 are electrically connected. Here, wiring G11 and wiring G12 may be electrically connected to each other. For transistor M20, for example, a P-type polarity transistor can be used.

[0186] The pixel circuit shown in FIG. 15(A) includes six transistors (M21 to M26), a capacitor element C4, and a light-emitting element 830. Also, in the pixel circuit shown in FIG. 15(A), wirings S5 to S7 and wirings G14 to G16 are electrically connected. Here, wiring G 14 and wiring G16 may be electrically connected to each other. Transistors M21 to For M26 and the like, for example, an N-type polarity transistor can be used. Also, as shown in FIG. 15(B), instead of transistors M21 to M26, P-type polarity transistors (transistors M27 to M32) may be used.

[0187] The pixel circuit shown in FIG. 16(A) includes two transistors (transistors M33 and transistor M34), two capacitive elements (capacitive elements C5 and C6), and a light-emitting element 830. Also, wiring S8 and wiring S9 as well as wirings G17 to G19 are electrically connected to the pixel circuit shown in FIG. 16(A). Further, by configuring the pixel circuit shown in FIG. 16(A), for example, a voltage input-current drive method (also referred to as the CVCC method) can be achieved. For transistors M33 and M34, for example, N-type polarity transistors can be used. Also, as shown in FIG. 16(B), instead of transistors M 33 and transistor M34, P-type polarity transistors (transistors M35 and transistor M36) may be used.

[0188] [Configuration Example 3] FIG. 9(B) shows a plan view of the display panel, and an example of a cross-sectional view between the dashed-dotted line A3 - A4 in FIG. 9(B) is shown in FIG. 17(A). The display panel shown in Configuration Example 3 is a top emission type display panel using a painting method.

[0189] The display panel shown in FIG. 17(A) includes a substrate 701, an adhesive layer 703, an insulating layer 705, a plurality of transistors, a conductive layer 857, an insulating layer 815, an insulating layer 817, a plurality of light-emitting elements, an insulating layer 8 21, a spacer 823, an adhesive layer 822, an insulating layer 715, and a substrate 711. The adhesive layer 822, the insulating layer 715, and the substrate 711 are transmissive to visible light.

[0190] In the display panel shown in Fig. 17(A), the connector 825 is located on the insulating layer 815. The connector 825 is connected to the conductive layer 857 through an opening provided in the insulating layer 815. Also , the connector 825 is connected to the FPC 808. The FPC 808 and the conductive layer 857 are electrically connected through the connector 825.

[0191] [Configuration Example 4] Fig. 9(B) shows a plan view of the display panel, and an example of a cross-sectional view between the dashed-dotted lines A3 - A4 in Fig. 9(B) is shown in Fig. 17(B). The display panel shown in Configuration Example 4 is a bottom emission type display panel using the color filter method.

[0192] The display panel shown in Fig. 17(B) includes a substrate 701, an adhesive layer 703, an insulating layer 705, a plurality of transistors, a conductive layer 857, an insulating layer 815, a coloring layer 845, an insulating layer 817a, an insulating layer 8 17b, a conductive layer 856, a plurality of light-emitting elements, an insulating layer 821, an adhesive layer 822, and a substrate 711 . The substrate 701, the adhesive layer 703, the insulating layer 705, the insulating layer 815, the insulating layer 817a, and the insulating layer 817b are transmissive to visible light.

[0193] The display unit 804 has a transistor 820, a transistor 824, and a light-emitting element 830 on the insulating layer 705. The light-emitting element 830 has a lower electrode 831 on the insulating layer 817b, an EL layer 833 on the lower electrode 831, and an upper electrode 835 on the EL layer 833. The lower electrode 831 is electrically connected to the source electrode or the drain electrode of the transistor 820. The end of the lower electrode 831 is covered with the insulating layer 821. The upper electrode 835 reflects visible light. ​​​It is preferable. The lower electrode 831 transmits visible light. The coloring layer that overlaps with the light-emitting element 830 The position where the 845 is provided is not particularly limited. For example, it may be provided between the insulating layer 817a and the insulating layer 817b or between the insulating layer 815 and the insulating layer 817a or the like.

[0194] The operation circuit portion 806 has a plurality of transistors on the substrate 701 via the adhesive layer 703 and the insulating layer 705. In FIG. 17(B), among the transistors included in the operation circuit portion 806, two transistors are shown.

[0195] By using a film with high moisture resistance for the insulating layer 705, it is possible to suppress the intrusion of impurities such as water into the light-emitting element 830, the transistor 820 , and the transistor 824, and the reliability of the display panel can be increased.

[0196] The conductive layer 857 is electrically connected to an external electrode that transmits an external signal or potential to the operation circuit portion 806. Here, an example in which the FPC 808 is provided as the external electrode is shown. Also, here, an example in which the conductive layer 857 is formed of the same material and in the same process as the conductive layer 856 is shown .

[0197] [An example of materials and forming methods] Next, materials and the like that can be used for the display panel or the light-emitting panel will be described. Note that the description of the configurations described earlier in this specification may be omitted.

[0198] For the substrate, materials such as glass, quartz, organic resin, metal, and alloy can be used. The substrate on the side where the light from the light-emitting element is extracted uses a material that transmits the light.

[0199] In particular, it is preferable to use a flexible substrate. For example, organic resin or a degree of flexibility Glass, metal, or alloy with appropriate thickness can be used.

[0200] Since the specific gravity of an organic resin is smaller than that of glass, using an organic resin as a flexible substrate can reduce the weight of the display panel compared to using glass, which is preferable.

[0201] It is preferable to use a material with high toughness for the substrate. This can achieve a display panel with excellent impact resistance and low breakage probability. For example, by using an organic resin substrate, a thin metal substrate, or an alloy substrate, a lighter and less breakage-prone display panel can be achieved compared to using a glass substrate.

[0202] Metal materials and alloy materials have high thermal conductivity and can easily conduct heat throughout the substrate, so they can suppress local temperature rise of the display panel, which is preferable. The thickness of the substrate made of metal materials or alloy materials is preferably 10 μm or more and 200 μm or less, and more preferably 20 μm or more and 50 μm or less.

[0203] The materials constituting the metal substrate or alloy substrate are not particularly limited. For example, aluminum, copper, nickel, or metal alloys such as aluminum alloys or stainless steel can be preferably used.

[0204] Also, using a material with a high thermal emissivity for the substrate can suppress the increase in the surface temperature of the display panel and suppress the destruction and reliability degradation of the display panel. For example, the substrate can be a laminated structure of a

[0205] metal substrate and a layer with a high thermal emissivity (for example, metal oxides or ceramic materials can be used). ​​​​Examples of substrates having flexibility and translucency include film-like plastic substrates, such as polyimide (PI), aramid, polyethylene terephthalate (PET), polyethersulfone (PES), polyethylene naphthalate (PEN), polycarbonate (PC), nylon, polyetheretherketone (PEEK), polysulfone (PSF), polyetherimide (PEI), polyarylate (PAR), polybutylene terephthalate (P BT), silicone resin, and other plastic substrates can be used. Further, the substrate may contain fibers or the like, for example, it may contain prepregs or the like. Further, the substrate is not limited to a resin film, and may be a transparent non-woven fabric obtained by continuously processing pulp into a sheet, a sheet containing artificial spider silk fibers containing a protein called fibroin, a composite obtained by mixing these with resin, a laminate of a non-woven fabric made of cellulose fibers having a fiber width of 4 nm or more and 100 nm or less and a resin film,

[0206] As the flexible substrate, a layer using the above materials may be laminated with a hard coat layer (for example, a silicon nitride layer or the like) that protects the surface of the device from scratches, or a layer made of a material capable of dispersing pressure (for example, an aramid

[0207] The flexible substrate can also be used by laminating a plurality of layers. In particular, when having a glass layer, the barrier properties against water and oxygen can be improved, and a highly reliable display panel can be obtained.

[0208] For example, a flexible substrate having a glass layer, an adhesive layer, and an organic resin layer A plate can be used. The thickness of the glass layer is 20 μm or more and 200 μm or less, preferably 25 μm or more and 100 μm or less. The glass layer with such a thickness can simultaneously achieve high barrier properties and flexibility against water and oxygen. Further, the thickness of the organic resin layer is 1 0 μm or more and 200 μm or less, preferably 20 μm or more and 50 μm or less. By providing such an organic resin layer outside the glass layer, cracks and fractures in the glass layer can be suppressed and the mechanical strength can be improved. By applying such a composite material of glass material and organic resin to the substrate, a highly reliable flexible display panel can be formed. Here, a method for forming a flexible display panel will be described.

[0209] Here, for the sake of convenience, a configuration including pixels and a driving circuit, a configuration including optical members such as color filters

[0210] , a configuration including a touch sensor circuit, or a configuration including other functional members will be referred to as an element layer. The element layer includes, for example, a display element, and may further include wiring electrically connected to the display element, and elements such as transistors used for pixels and circuits.

[0211] Here, the support having an insulating surface on which the element layer is formed will be referred to as a base material.

[0212] As a method for forming an element layer on a flexible base material, there are a method of directly forming an element layer on the base material, and a method of forming an element layer on a support base material having a rigidity different from that of the base material, and then peeling the element layer and the support base material and transferring the element layer to the base material.

[0213] ​​​​​When the material constituting the base material has heat resistance to the heat applied in the element layer formation process, , it is preferable to form the element layer directly on the base material because the process is simplified. At this time, when forming the element layer with the base material fixed to the support base material, it is preferable because transportation within the apparatus and between apparatuses becomes easy.

[0214] Also, when using the method of transferring to the base material after forming the element layer on the support base material, first laminate the release layer and the insulating layer on the support base material, and form the element layer on the insulating layer. Subsequently, peel the element layer from the support base material and transfer it to the base material. At this time, a material that causes peeling at the interface between the support base material and the release layer, the interface between the release layer and the insulating layer, or within the release layer may be selected. By such a method, it becomes possible to perform processing at a temperature higher than the heat resistance temperature of the base material in the element layer formation process, so that the reliability of the display panel can be improved.

[0215] For example, a layer containing a high melting point metal material such as tungsten as the release layer and a layer containing an oxide of the metal material are laminated and used, and as the insulating layer on the release layer, a layer in which a plurality of silicon nitride or silicon oxynitride layers are laminated is preferably used. When using a high melting point metal material, high-temperature processing can be performed during the formation of the element layer, and the reliability can be improved. For example, impurities contained in the element layer can be further reduced, or the crystallinity of semiconductors and the like contained in the element layer can be further increased .

[0216] Peeling may be performed by applying mechanical force to peel, removing the release layer by etching, or dropping a liquid on a part of the peeling interface and allowing it to penetrate the entire peeling interface.

[0217] Also, when peeling is possible at the interface between the support substrate and the insulating layer, the peeling layer may not be provided. For example, using glass as the support substrate and an organic resin such as polyimide as the insulating layer , a peeling starting point is formed by locally heating a part of the organic resin with a laser beam or the like, and peeling may be performed at the interface between the glass and the insulating layer. Or, between the support substrate and the insulating layer containing the organic resin , a layer of a material with high thermal conductivity such as metal or semiconductor is provided, and current is passed through this to heat it to make it in a state where peeling is easy, and peeling may be performed. At this time, the insulating layer containing the organic resin can also be used as a substrate.

[0218] For the adhesive layer, various curable resins such as photocurable resins such as ultraviolet curable resins, reaction curable resins, thermosetting resins, anaerobic resins can be used. Examples of these resins include epoxy resins, acrylic resins, silicone resins, phenolic resins, polyimide resins, imide resins, PVC (polyvinyl chloride) resins, PVB (polyvinyl butyral) resins, EVA (ethylene vinyl acetate) resins, etc. In particular, materials with low moisture permeability such as epoxy resins are preferred . Also, two-component mixed resins may be used. Also, adhesive sheets or the like may be used.

[0219] Also, the above resin may contain a desiccant. For example, substances that adsorb moisture by chemical adsorption, such as oxides of alkaline earth metals (calcium oxide, barium oxide, etc.), can be used . Or, substances that adsorb moisture by physical adsorption, such as zeolite or silica gel, may be used. When a desiccant is included, it is possible to suppress the intrusion of impurities such as moisture into the light-emitting element, which is preferable because the reliability of the display panel is improved.

[0220] Also, by mixing a filler or a light-scattering member having a high refractive index into the above resin, the light extraction efficiency from the light-emitting element can be improved. For example, titanium oxide, barium oxide, zeolite, zirconium, etc. can be used.

[0221] As the insulating layer 705 and the insulating layer 715, it is preferable to use an insulating film having high moisture resistance . Alternatively, it is preferable that the insulating layer 705 and the insulating layer 715 have a function of preventing diffusion of impurities into the light-emitting element .

[0222] Examples of the insulating film having high moisture resistance include films containing nitrogen and silicon such as a silicon nitride film and a silicon oxynitride film, and films containing nitrogen and aluminum such as an aluminum nitride film. Further, a silicon oxide film, a silicon oxynitride film, an aluminum oxide film, etc. may be used.

[0223] For example, the water vapor transmission rate of the insulating film having high moisture resistance is 1×10 -5 [g / (m 2 ·day) or less, preferably 1×10 -6 [g / (m 2 ·day)] or less, more preferably 1×1 0 -7 [g / (m 2 ·day)] or less, still more preferably 1×10 -8 [g / (m 2 ·d ay)] or less.

[0224] In the display panel, at least the insulating layer on the light-emitting surface side of the insulating layer 705 or the insulating layer 715 needs to transmit the light emitted by the light-emitting element. When the display panel has the insulating layer 705 and the insulating layer 7 15, among the insulating layer 705 or the insulating layer 715, the side that transmits the light emitted by the light-emitting element ​The insulating layer preferably has a higher average transmittance at wavelengths of 400 nm or more and 800 nm or less than the other insulating layer. Preferably, the average is high.

[0225] The insulating layer 705 and the insulating layer 715 preferably contain oxygen, nitrogen, and silicon. For example, the insulating layer 705 and the insulating layer 715 preferably contain silicon oxynitride. Also, the insulating layer 705 and the insulating layer 715 preferably contain silicon nitride or silicon oxynitride. Further, the insulating layer 705 and the insulating layer 715 preferably have a silicon oxynitride film and a silicon nitride film, and the silicon oxynitride film and the silicon nitride film preferably contact each other. By alternately laminating the silicon oxynitride film and the silicon nitride film so that a lot of interference of opposite phases occurs in the visible region, the transmittance of the laminate in the visible region can be increased.

[0226] The structure of the transistor included in the display panel is not particularly limited. For example, it may be a staggered transistor or an inverted staggered transistor. Also, it may have any transistor structure of a top gate type or a bottom gate type. The semiconductor material used for the transistor is not particularly limited, and examples thereof include silicon, germanium, and organic semiconductors. Alternatively, an oxide semiconductor containing at least one of indium, gallium, and zinc, such as an In-Ga-Zn-based metal oxide, may be used.

[0227] The crystallinity of the semiconductor material used for the transistor is not particularly limited, and any of an amorphous semiconductor, a semiconductor having crystallinity (microcrystalline semiconductor, polycrystalline semiconductor, single crystal semiconductor, or semiconductor having a crystal region in part) may be used. When a semiconductor having crystallinity is used, the transistor This is preferable because it is possible to suppress deterioration of the resistor characteristics.

[0228] In order to stabilize the characteristics of the transistor, it is preferable to provide an undercoat film. , silicon oxide film, silicon nitride film, silicon oxynitride film, silicon nitride oxide film, etc. The base film can be formed by a single layer or a multilayer structure using an organic insulating film. , CVD (Chemical Vapor Deposition) method (Plasma CVD method, thermal CVD method, MOCVD (Metal Organic CVD) method, etc.), ALD (Atomic Layer Deposition), coating, printing, etc. In addition, the undercoat film does not have to be provided if it is not necessary. The layer 705 can also serve as an underlayer for the transistor.

[0229] The light-emitting element may be a self-emitting element that is illuminated by a current or a voltage. The category includes devices whose light intensity can be controlled. For example, light-emitting diodes (LEDs), organic An EL element, an inorganic EL element, etc. can be used.

[0230] The light-emitting elements are top emission type, bottom emission type, and dual emission type. The electrode on the light extraction side is made of a conductive film that transmits visible light. In addition, it is preferable to use a conductive film that reflects visible light for the electrode on the side from which light is not extracted. stomach.

[0231] The conductive film that transmits visible light is, for example, indium oxide or indium tin oxide (ITO). Indium Tin Oxide, Indium Zinc Oxide, Zinc Oxide (ZnO), Ga It can be formed using zinc oxide added with lithium. Also, metals such as gold, silver, platinum, magnesium, nickel, tungsten, chromium, molybdenum, iron, cobalt, copper, palladium, or titanium, alloys containing these metal materials, or nitrides (e.g., titanium nitride) of these metal materials can also be used by forming them thinly enough to have translucency. Also, a laminated film of the above materials can be used as a conductive layer. For example, using a laminated film of an alloy of silver and magnesium and ITO can enhance conductivity, which is preferable. Also, graphene or the like may be used. A conductive film that reflects visible light can be formed using, for example, metal materials such as aluminum, gold, platinum, silver, nickel, tungsten, chromium, molybdenum, iron, cobalt, copper, or palladium, or alloys containing these metal materials. Also, rare earths such as lanthanum, neodymium, or germanium may be added to the above metal materials or alloys. Also, alloys containing aluminum such as an alloy of aluminum and titanium, an alloy of aluminum and nickel, an alloy of aluminum and neodymium, an alloy of aluminum, nickel, and lanthanum (Al-Ni-La), or alloys containing silver such as an alloy of silver and copper, an alloy of silver, palladium, and copper (also denoted as Ag-Pd-Cu, APC), or an alloy of silver and magnesium can be used. An alloy containing silver and copper is preferable because of its high heat resistance. Further, oxidization of the aluminum alloy film can be suppressed by laminating a metal film or a metal oxide film in contact with the aluminum alloy film. Examples of the materials for the metal film and the metal oxide film include titanium and titanium oxide. Also, a film composed of the above conductive film that transmits visible light and a metal material may be laminated. Metal materials such as magnesium, nickel, tungsten, chromium, molybdenum, iron, cobalt, copper, palladium, or titanium, alloys containing these metal materials, or nitrides (e.g., titanium nitride) of these metal materials can also be used by forming them thinly enough to have translucency. Also, a laminated film of the above materials can be used as a conductive layer. For example, using a laminated film of an alloy of silver and magnesium and ITO can enhance conductivity, which is preferable. Also, graphene or the like may be used. For example, using a laminated film of an alloy of silver and magnesium and ITO can enhance conductivity, which is preferable. Also, graphene or the like may be used. Using a laminated film of an alloy of silver and magnesium and ITO can enhance conductivity, which is preferable. Also, graphene or the like may be used.

[0232] A conductive film that reflects visible light can be formed using, for example, metal materials such as aluminum, gold, platinum, silver, nickel, tungsten, chromium, molybdenum, iron, cobalt, copper, or palladium, or alloys containing these metal materials. Also, rare earths such as lanthanum, neodymium, or germanium may be added to the above metal materials or alloys. Also, alloys containing aluminum such as an alloy of aluminum and titanium, an alloy of aluminum and nickel, an alloy of aluminum and neodymium, an alloy of aluminum, nickel, and lanthanum (Al-Ni-La), or alloys containing silver such as an alloy of silver and copper, an alloy of silver, palladium, and copper (also denoted as Ag-Pd-Cu, APC), or an alloy of silver and magnesium can be used. An alloy containing silver and copper is preferable because of its high heat resistance. Further, oxidization of the aluminum alloy film can be suppressed by laminating a metal film or a metal oxide film in contact with the aluminum alloy film. Examples of the materials for the metal film and the metal oxide film include titanium and titanium oxide. Also, a film composed of the above conductive film that transmits visible light and a metal material may be laminated. A conductive film that reflects visible light can be formed using, for example, metal materials such as aluminum, gold, platinum, silver, nickel, tungsten, chromium, molybdenum, iron, cobalt, copper, or palladium, or alloys containing these metal materials. Also, rare earths such as lanthanum, neodymium, or germanium may be added to the above metal materials or alloys. Also, alloys containing aluminum such as an alloy of aluminum and titanium, an alloy of aluminum and nickel, an alloy of aluminum and neodymium, an alloy of aluminum, nickel, and lanthanum (Al-Ni-La), or alloys containing silver such as an alloy of silver and copper, an alloy of silver, palladium, and copper (also denoted as Ag-Pd-Cu, APC), or an alloy of silver and magnesium can be used. An alloy containing silver and copper is preferable because of its high heat resistance. Further, oxidization of the aluminum alloy film can be suppressed by laminating a metal film or a metal oxide film in contact with the aluminum alloy film. For example, a laminated film of silver and ITO, or a laminated film of silver-magnesium alloy and ITO, etc. It is possible.

[0233] The conductive layer constituting the lower electrode 831, the upper electrode 835, and the auxiliary electrode 860 (conductive layer 8 The material used for the conductive layer 860a and the conductive layer 860b may be the conductive film or the transparent film that transmits visible light. A conductive film that reflects visible light can be used.

[0234] The electrodes may be formed by vapor deposition or sputtering. The shape is created using a discharge method such as the ink jet method, a printing method such as the screen printing method, or a plating method. It can be achieved.

[0235] A voltage higher than the threshold voltage of the light emitting element is applied between the lower electrode 831 and the upper electrode 835. When this occurs, holes are injected into the EL layer 833 from the anode side, and electrons are injected from the cathode side. The electrons and holes are recombined in the EL layer 833, and the light-emitting material contained in the EL layer 833 emits light. It shines.

[0236] The EL layer 833 has at least a light-emitting layer. The EL layer 833 has the following layers other than the light-emitting layer: Materials with high hole injection properties, materials with high hole transport properties, hole blocking materials, materials with high electron transport properties A material with high electron injection properties or a bipolar material (with high electron transport and hole transport properties) The layer may further include a layer containing a material such as a metal.

[0237] The EL layer 833 can be made of either a low molecular weight compound or a high molecular weight compound. The layers constituting the EL layer 833 may each be formed by deposition (vacuum deposition). It can be formed by methods such as the transfer method, printing method, inkjet method, coating method, etc. to cut.

[0238] The light-emitting element 830 may contain two or more light-emitting substances. Thereby, for example, a white light-emitting light-emitting element can be realized. For example, white light can be obtained by selecting light-emitting substances such that the emission of each of the two or more light-emitting substances is in a complementary color relationship. For example, light-emitting substances that exhibit light emission such as R (red), G (green), B (blue), Y (yellow), or O (orange), or light-emitting substances that exhibit light emission containing spectral components of two or more colors among R, G, and B can be used. For example, a light-emitting substance that exhibits blue light emission and a light-emitting substance that exhibits yellow light emission may be used. At this time, the emission spectrum of the light-emitting substance that exhibits yellow light emission preferably contains spectral components of green and red. In addition, the emission spectrum of the light-emitting element 830 preferably has two or more peaks within the wavelength range of the visible region (for example, 350 nm or more and 750 nm or less, or 400 nm or more and 800 nm or less, etc.).

[0239] The EL layer 833 may have a plurality of light-emitting layers. In the EL layer 833, the plurality of light-emitting layers may be laminated in contact with each other, or may be laminated via a separation layer. For example, a separation layer may be provided between the fluorescent light-emitting layer and the phosphorescent light-emitting layer.

[0240] The separation layer can be provided, for example, to prevent Dexter mechanism-based energy transfer (particularly triplet energy transfer) from a phosphorescent material or the like generated in the phosphorescent light-emitting layer to a fluorescent material or the like in the fluorescent light-emitting layer. The separation layer can be provided to have a thickness of about several nm. Specifically, 0 .1 nm or more and 20 nm or less, or 1 nm or more and 10 nm or less, or 1 nm or more and 5 n m. It is m or less. The separation layer includes a single material (preferably a bipolar material) or a plurality of materials (preferably a hole transporting material and an electron transporting material). The separation layer may be formed using the materials contained in the light emitting layer in contact with the separation layer. This makes it easier to manufacture the light emitting element and reduces the driving voltage. For example, when the phosphorescent light emitting layer consists of a host material, an assist material, and a phosphorescent material (guest material), the separation layer may be formed of the host material and the assist material. In other words, the separation layer has a region that does not contain the phosphorescent material, and the phosphorescent light emitting layer has a region that contains the phosphorescent material. This makes it possible to deposit the separation layer and the phosphorescent light emitting layer separately by selecting the presence or absence of the phosphorescent material.

[0241] Also, with such a configuration, it becomes possible to form the separation layer and the phosphorescent light emitting layer in the same chamber. This can reduce the manufacturing cost. For example, when the phosphorescent light emitting layer consists of a host material, an assist material, and a phosphorescent material (guest material), the separation layer may be formed of the host material and the assist material. That is, the separation layer has a region that does not contain the phosphorescent material, and the phosphorescent light emitting layer has a region that contains the phosphorescent material. In other words, the separation layer has a region that does not contain the phosphorescent material, and the phosphorescent light emitting layer has a region that contains the phosphorescent material. This makes it possible to deposit the separation layer and the phosphorescent light emitting layer separately by selecting the presence or absence of the phosphorescent material. This makes it possible to deposit the separation layer and the phosphorescent light emitting layer separately by selecting the presence or absence of the phosphorescent material. Also, with such a configuration, it becomes possible to form the separation layer and the phosphorescent light emitting layer in the same chamber. This can reduce the manufacturing cost.

[0242] The light emitting element 830 may be a single element having one EL layer, or may be a tandem element having a plurality of EL layers stacked via a charge generation layer. The light emitting element is preferably provided between a pair of highly moisture-proof insulating films. This can prevent impurities such as water from entering the light emitting element and reduce the reliability degradation of the display panel.

[0243] The light emitting element is preferably provided between a pair of highly moisture-proof insulating films. This can prevent impurities such as water from entering the light emitting element and reduce the reliability degradation of the display panel. This can prevent impurities such as water from entering the light emitting element and reduce the reliability degradation of the display panel.

[0244] As the insulating layer 815 and the insulating layer 816, for example, an inorganic insulating film such as a silicon oxide film, a silicon oxynitride film, or an aluminum oxide film can be used. Note that the insulating layer 815 and the insulating layer 816 may be formed of different materials. Also, the insulating layer 817 and the insulating layer 8 As the insulating layer 815 and the insulating layer 816, for example, an inorganic insulating film such as a silicon oxide film, a silicon oxynitride film, or an aluminum oxide film can be used. Note that the insulating layer 815 and the insulating layer 816 may be formed of different materials. The insulating layer 817a and the insulating layer 817b may be made of, for example, polyimide, acrylic, polyamide ... Organic materials such as polyimide amide and benzocyclobutene resins can be used. In addition, low dielectric constant materials (low-k materials) can be used. Each insulating layer may be formed by laminating.

[0245] The insulating layer 821 is formed using an organic insulating material or an inorganic insulating material. For example, polyimide resin, polyamide resin, acrylic resin, siloxane resin, epoxy resin, etc. In particular, photosensitive resin materials can be used. An opening is formed on the bottom electrode 831, and the side wall of the opening is formed with a continuous curvature. It is preferable to form the surface so as to have an inclined surface.

[0246] The method for forming the insulating layer 821 is not particularly limited, but may be a photolithography method, a sputtering method, or the like. , deposition method, droplet ejection method (inkjet method, etc.), printing method (screen printing, offset printing It is advisable to use a printing method, etc.

[0247] The spacer 823 may be formed using an inorganic insulating material, an organic insulating material, a metal material, or the like. For example, inorganic insulating materials and organic insulating materials can be used for the insulating layer. Examples of metal materials that can be used include titanium and aluminum. The spacer 823 containing a conductive material and the upper electrode 835 are electrically connected to each other. This makes it possible to suppress a potential drop caused by the resistance of the upper electrode 835. The shape of the 23 may be either a forward taper shape or a reverse taper shape.

[0248] A conductive layer that functions as an electrode or wiring of a transistor, or an auxiliary electrode of a light-emitting element, etc., is provided on a display panel. The conductive layer used, for example, can be formed of a single layer or by lamination using a metal material such as molybdenum, titanium, chromium, tantalum, tungsten, aluminum, neodymium, scandium, or an alloy material containing these elements. Further, the conductive layer may be formed using a conductive metal oxide. As the conductive metal oxide, indium oxide (such as In2O3), tin oxide (such as SnO2), ZnO, ITO, indium zinc oxide (such as In2O3-ZnO), or a material in which silicon oxide is included in these metal oxide materials can be used. ), etc. The colored layer is a colored layer that transmits light in a specific wavelength band. For example, a color filter that transmits light in a wavelength band of red, green, blue, or yellow can be used. Each colored layer can be formed at a desired position using various materials by a printing method, an inkjet method, an etching method using photolithography, etc.

[0249] In addition, in the case of a white sub-pixel, a resin such as transparent or white may be arranged so as to overlap with the light-emitting element. The light-shielding layer is provided between adjacent colored layers. The light-shielding layer shields light from adjacent light-emitting elements and suppresses color mixing between adjacent light-emitting elements. Here, by providing the end portion of the colored layer so as to overlap with the light-shielding layer, light leakage can be suppressed. As the light-shielding layer, a material that blocks light emission from the light-emitting element can be used. For example, a black matrix may be formed using a resin material containing a metal material, a pigment, or a dye. Note that if the light-shielding layer is provided in a region other than the display portion such as a drive circuit portion, unintended light leakage due to guided light or the like can be suppressed.

[0250] the light leakage due to guided light or the like can be suppressed. The light-shielding layer shields light from adjacent light-emitting elements and suppresses color mixing between adjacent light-emitting elements. Here, by providing the end portion of the colored layer so as to overlap with the light-shielding layer, light leakage can be suppressed. As the light-shielding layer, a material that blocks light emission from the light-emitting element can be used. For example, a black matrix may be formed using a resin material containing a metal material, a pigment, or a dye. Note that if the light-shielding layer is provided in a region other than the display portion such as a drive circuit portion, unintended light leakage due to guided light or the like can be suppressed. If the light-shielding layer is provided in a region other than the display portion such as a drive circuit portion, is preferable.

[0251] In addition, an overcoat covering the colored layer and the light-shielding layer may be provided. By providing the overcoat, diffusion of impurities and the like contained in the colored layer into the light-emitting element can be prevented. The overcoat is composed of a material that transmits light emitted from the light-emitting element. For example, an inorganic insulating film such as a silicon nitride film or a silicon oxide film, or an organic insulating film such as an acrylic film or a polyimide film can be used, and a laminated structure of an organic insulating film and an inorganic insulating film may be used.

[0252] When applying the material of the adhesive layer onto the colored layer and the light-shielding layer, it is preferable to use a material having high wettability with respect to the material of the adhesive layer as the material of the overcoat. For example, as the overcoat, it is preferable to use a metal film such as an oxide conductive film such as an ITO film or a thin Ag film having a certain degree of light transmittance.

[0253] As the connector, various anisotropic conductive films (ACF: Anisotropic Conductive Film) or anisotropic conductive pastes (ACP: Anisotropic Conductive Paste) can be used.

[0254] In this specification and the like, a display element, a display panel which is a panel having the display element, a light-emitting element, and a light-emitting panel which is a panel having the light-emitting element can use various forms or can have various elements. The display element, the display panel, the light-emitting element or the light-emitting panel can be, for example, an EL element (an EL element including an organic substance and an inorganic substance, an organic EL element, an inorganic EL element), an LED (a white LED, a red LED, a green LED, a blue LED, etc.), a transistor (responding to current transistor that emits light, electron-emitting device, liquid crystal device, electronic ink, electrophoretic device, g rating light valve (GLV), plasma display panel (PDP), MEM S (micro-electro-mechanical system) display element, digital microphone romirror device (DMD), DMS (digital micro shutter), IMOD( interference modulation) element, shutter-type MEMS display element, optical interference-type MEMS display element, electro-wetting element, piezoelectric ceramic dis play, display element using carbon nanotubes, etc., which may have a display medium in which contrast, brightness, reflectance, transmittance, etc. change due to electrical or magnetic action. As an example of a display panel using an EL element, there is an EL display, etc. As an example of a display panel using an electron-emitting device, there is a field emission display (FED) or SED type flat panel display (SED: Surface-conduction El ectron-emitter Display), etc. As an example of a display panel using a liquid crystal device there are liquid crystal displays (transmissive liquid crystal displays, transflective liquid crystal dis plays, reflective liquid crystal displays, direct-view liquid crystal displays, projection liquid crystal displays) etc. As an example of a display panel using electronic ink, electronic powder fluid (registered trademark), or an electrophoretic device, there is electronic paper, etc. In the case of realizing a transflective liquid crystal display or a reflective liquid crystal display, part or all of the pixel electrodes may have the function as a reflective electrode. For example, part or all of the pixel electrodes may have aluminum, silver, etc. Further, in that case, under the reflective electrode, a memory such as SRAM It is also possible to provide a circuit. Thereby, further, power consumption can be reduced. . When using an LED, graphene or graphite may be disposed under the electrodes of the LED or the nitride semiconductor. Graphene or graphite may be stacked in multiple layers to form a multilayer film. Thus, by providing graphene or graphite, an n-type GaN semiconductor layer having crystals, for example, can be easily formed thereon. Furthermore, a p-type GaN semiconductor layer having crystals or the like can be provided thereon to form an LED. . An AlN layer may be provided between the graphene or graphite and the n-type GaN semiconductor layer having crystals. The GaN semiconductor layer of the LED may be formed by MOCVD. However, by providing graphene, the GaN semiconductor layer of the LED can also be formed by sputtering. For example, in this specification and the like, an active matrix method in which a pixel has an active element (active element, non-linear element), or a passive matrix method in which a pixel does not have an active element can be used. In the active matrix method, not only transistors but also various active elements can be used. For example, MIM (Metal Insulator Metal) or TFT (Thin Film Diode) can also be used. Since these elements have fewer manufacturing steps, the manufacturing cost can be reduced or the yield can be improved.

[0255] Or, since the size of these elements is small, the aperture ratio can be improved, and low power consumption and high brightness can be achieved. For example, in this specification and the like, an active matrix method in which a pixel has an active element (active element, non-linear element), or a passive matrix method in which a pixel does not have an active element can be used. For example, in this specification and the like, an active matrix method in which a pixel has an active element (active element, non-linear element), or a passive matrix method in which a pixel does not have an active element can be used.

[0256] In the active matrix method, not only transistors but also various active elements can be used. For example, MIM (Metal Insulator Metal), or TFT (Thin Film Diode) can also be used. These elements can be used. Since these elements have fewer manufacturing steps, the manufacturing cost can be reduced or the yield can be improved. Or, since the size of these elements is small, the aperture ratio can be improved. Low power consumption and high brightness can be achieved.

[0257] In the passive matrix method, since no active elements are used, the manufacturing process can be reduced, resulting in a reduction in manufacturing cost or an improvement in yield. Alternatively, in the passive matrix method, since no active elements are used, the aperture ratio can be improved, enabling low power consumption operation or high brightness operation, etc.

[0258] Note that the light-emitting panel according to one aspect of the present invention may be used as a display panel or as an illumination panel. For example, it may be utilized as a light source such as a backlight or a front light, that is, as an illumination panel for a display panel.

[0259] As described above, by using the display panel having a transparent portion exemplified in the present embodiment, it is possible to realize a large-sized display device in which the joints of the display portion are difficult to recognize and display unevenness is suppressed.

[0260] The present embodiment can be appropriately combined with other embodiments.

[0261] (Embodiment 3) In the present embodiment, a touch panel that can be used in the display device according to one aspect of the present invention will be described with reference to the drawings. Note that, for the same configurations as the display panel described in Embodiment 2, the previous description can also be referred to. In the present embodiment, a touch panel using a light-emitting element is exemplified, but the present invention is not limited to this. For example, a touch panel using other elements (such as display elements) exemplified in Embodiment 2 can also be used in the display device according to one aspect of the present invention.

[0262] [Configuration Example 1] Fig. 18(A) is a top view of the touch panel. Fig. 18(B) is a sectional view taken along the dash-dotted line between A and B and the dash-dotted line between C and D in Fig. 18(A). Fig. 18(C) is a sectional view taken along the dash-dotted line between E and F in Fig. 18(A).

[0263] The touch panel 390 shown in Fig. 18(A) includes a display unit 301 (which also serves as an input unit), scanning lines drive circuit 303g(1), imaging pixel drive circuit 303g(2), image signal line drive circuit 303 s(1), and imaging signal line drive circuit 303s(2).

[0264] The display unit 301 includes a plurality of pixels 302 and a plurality of imaging pixels 308.

[0265] The pixel 302 includes a plurality of sub-pixels. Each sub-pixel includes a light-emitting element and a pixel circuit.

[0266] The pixel circuit can supply power to drive the light-emitting element. The pixel circuit is electrically connected to a wiring that can supply a selection signal and is also electrically connected to a wiring that can supply an image signal.

[0267] The scanning line drive circuit 303g(1) can supply a selection signal to the pixel 302.

[0268] The image signal line drive circuit 303s(1) can supply an image signal to the pixel 302 .

[0269] A touch sensor can be configured using the imaging pixel 308. Specifically, the imaging pixel 308 can detect a finger or the like touching the display unit 301.

[0270] The imaging pixel 308 includes a photoelectric conversion element and an imaging pixel circuit.

[0271] ​The imaging pixel circuit can drive a photoelectric conversion element. The imaging pixel circuit is electrically connected to a wiring capable of supplying a control signal. Also, the imaging pixel circuit is electrically connected to a wiring capable of supplying a power supply potential .

[0272] Examples of the control signal include a signal capable of selecting an imaging pixel circuit that reads out a recorded imaging signal, a signal capable of initializing the imaging pixel circuit, and a signal capable of determining the time for the imaging pixel circuit to detect light, etc.

[0273] The imaging pixel driving circuit 303g(2) can supply a control signal to the imaging pixel 308.

[0274] The imaging signal line driving circuit 303s(2) can read out an imaging signal.

[0275] As shown in FIGS. 18(B) and (C), the touch panel 390 has a substrate 701, an adhesive layer 703, an insulating layer 705, a substrate 711, an adhesive layer 713, and an insulating layer 715. Also, the substrate 701 and the substrate 711 are bonded together with an adhesive layer 360.

[0276] The substrate 701 and the insulating layer 705 are bonded together with an adhesive layer 703. Also, the substrate 711 and the insulating layer 715 are bonded together with an adhesive layer 713.

[0277] The substrate 701 and the substrate 711 preferably have flexibility.

[0278] For the materials that can be used for the substrate, the adhesive layer, and the insulating layer, refer to Embodiment 2.

[0279] ​​​​​Pixel 302 has sub-pixels 302R, 302G, and 302B (Fig. 1 8(C)). Also, sub-pixel 302R has light-emitting module 380R, sub-pixel 302G has light-emitting module 380G, and sub-pixel 302B has light-emitting module 380B.

[0280] For example, sub-pixel 302R has light-emitting element 350R and a pixel circuit. The pixel circuit includes a transistor 302t that can supply power to the light-emitting element 350R. Also, light-emitting module 380R has light-emitting element 350R and an optical element (e.g., a coloring layer 367R that transmits red light). 367R).

[0281] Light-emitting element 350R has a lower electrode 351R, an EL layer 353, and an upper electrode 352 laminated in this order (Fig. 18(C)).

[0282] EL layer 353 has a first EL layer 353a, an intermediate layer 354, and a second EL layer 353b laminated in this order .

[0283] Note that a microcavity structure can be disposed in light-emitting module 380R so as to efficiently extract light of a specific wavelength. Specifically, the EL layer can be disposed between a film that reflects visible light and a film that is semi-reflective and semi-transmissive, which are arranged so as to efficiently extract specific light . .

[0284] For example, light-emitting module 380R has an adhesive layer 360 that contacts light-emitting element 350R and coloring layer 367R .

[0285] Coloring layer 367R is located at a position overlapping light-emitting element 350R. As a result, a part of the light emitted by light-emitting element 350 R passes through adhesive layer 360 and coloring layer 367R and is indicated by the arrow in the figure​ It is emitted to the outside of the light-emitting module 380R as shown.

[0286] The touch panel 390 has a light-shielding layer 367BM. The light-shielding layer 367BM is provided so as to surround a colored layer (for example, the colored layer 367R). For example, it may be provided so as to surround the colored layer 367R.

[0287] The touch panel 390 has an antireflection layer 367p at a position overlapping the display unit 301. As the antireflection layer 367p, for example, a circularly polarized plate can be used. For example, a circularly polarized plate can be used as the antireflection layer 367p.

[0288] The touch panel 390 has an insulating layer 321. The insulating layer 321 covers the transistor 302t and the like. Note that the insulating layer 321 can be used as a layer for flattening unevenness caused by a pixel circuit or an imaging pixel circuit. Also, an insulating layer in which a layer capable of suppressing the diffusion of impurities into the transistor 302t and the like is laminated can be applied to the insulating layer 321. For example, the insulating layer 321 can be used as a layer for flattening unevenness caused by a pixel circuit or an imaging pixel circuit. Also, an insulating layer in which a layer capable of suppressing the diffusion of impurities into the transistor 302t and the like is laminated can be applied to the insulating layer 321. For example, the insulating layer 321 can be used as a layer for flattening unevenness caused by a pixel circuit or an imaging pixel circuit. Also, an insulating layer in which a layer capable of suppressing the diffusion of impurities into the transistor 302t and the like is laminated can be applied to the insulating layer 321. For example, the insulating layer 321 can be used as a layer for flattening unevenness caused by a pixel circuit or an imaging pixel circuit. Also, an insulating layer in which a layer capable of suppressing the diffusion of impurities into the transistor 302t and the like is laminated can be applied to the insulating layer 321. For example, the insulating layer 321 can be used as a layer for flattening unevenness caused by a pixel circuit or an imaging pixel circuit. Also, an insulating layer in which a layer capable of suppressing the diffusion of impurities into the transistor 302t and the like is laminated can be applied to the insulating layer 321.

[0289] The touch panel 390 has a partition wall 328 overlapping the end of the lower electrode 351R. Also, a spacer 329 for controlling the distance between the substrate 701 and the substrate 711 is provided on the partition wall 328. Also, a spacer 329 for controlling the distance between the substrate 701 and the substrate 711 is provided on the partition wall 328.

[0290] The image signal line driving circuit 303s(1) includes a transistor 303t and a capacitor 303c. Note that the driving circuit can be formed on the same substrate in the same process as the pixel circuit. As shown in FIG. 18(B), the transistor 303t may have a second gate 304 on the insulating layer 321. The second gate 304 may be electrically connected to the gate of the transistor 303t, or different potentials may be applied to these. Also, if necessary, the second gate 304 may be provided for the transistor 308t, the transistor 302t, and the like. Note that the driving circuit can be formed on the same substrate in the same process as the pixel circuit. As shown in FIG. 18(B), the transistor 303t may have a second gate 304 on the insulating layer 321. The second gate 304 may be electrically connected to the gate of the transistor 303t, or different potentials may be applied to these. Also, if necessary, the second gate 304 may be provided for the transistor 308t, the transistor 302t, and the like. As shown in FIG. 18(B), the transistor 303t may have a second gate 304 on the insulating layer 321. The second gate 304 may be electrically connected to the gate of the transistor 303t, or different potentials may be applied to these. Also, if necessary, the second gate 304 may be provided for the transistor 308t, the transistor 302t, and the like. As shown in FIG. 18(B), the transistor 303t may have a second gate 304 on the insulating layer 321. The second gate 304 may be electrically connected to the gate of the transistor 303t, or different potentials may be applied to these. Also, if necessary, the second gate 304 may be provided for the transistor 308t, the transistor 302t, and the like. As shown in FIG. 18(B), the transistor 303t may have a second gate 304 on the insulating layer 321. The second gate 304 may be electrically connected to the gate of the transistor 303t, or different potentials may be applied to these. Also, if necessary, the second gate 304 may be provided for the transistor 308t, the transistor 302t, and the like. As shown in FIG. 18(B), the transistor 303t may have a second gate 304 on the insulating layer 321. The second gate 304 may be electrically connected to the gate of the transistor 303t, or different potentials may be applied to these. Also, if necessary, the second gate 304 may be provided for the transistor 308t, the transistor 302t, and the like.

[0291] The imaging pixel 308 includes a photoelectric conversion element 308p and an imaging pixel circuit. The imaging pixel circuit is capable of detecting the light irradiated on the photoelectric conversion element 308p. The imaging pixel circuit includes a transistor 308t.

[0292] For example, a pin-type photodiode can be used as the photoelectric conversion element 308p.

[0293] The touch panel 390 has a wiring 311 capable of supplying signals, and a terminal 319 is provided on the wiring 311. Note that an FPC 309 capable of supplying signals such as an image signal and a synchronization signal is electrically connected to the terminal 319. Note that a printed wiring board (PWB) may be attached to the FPC 309.

[0294] Note that transistors such as the transistor 302t, the transistor 303t, and the transistor 308t can be formed in the same process. Or, they may be formed in different processes respectively.

[0295] [Configuration Example 2] FIGS. 19(A) and (B) are perspective views of a touch panel 505A. For clarity, representative components are shown. FIG. 20(A) is a cross-sectional view taken along the dashed line G-H shown in FIG. 19(A).

[0296] As shown in FIGS. 19(A) and (B), the touch panel 505A includes a display unit 501, a scanning line driver circuit 303g(1), and a touch sensor 595, etc. Also, the touch panel 50 5A includes a substrate 701, a substrate 711, and a substrate 590.

[0297] The touch panel 505A has a plurality of pixels and a plurality of wirings 311. The plurality of wirings 31 1 can supply signals to the pixels. The plurality of wirings 311 are routed to the outer peripheral portion of the substrate 701 and a part of them constitutes the terminal 319. The terminal 319 is electrically connected to the FPC 509(1 ).

[0298] The touch panel 505A has a touch sensor 595 and a plurality of wirings 598. The plurality of wirings 598 are electrically connected to the touch sensor 595. The plurality of wirings 598 are routed to the outer peripheral portion of the substrate 59 0 and a part of them constitutes a terminal. And the terminal is electrically connected to the FPC 509 (2). In FIG. 19(B), for clarity, the electrodes, wirings, etc. of the touch sensor 595 provided on the back surface side of the substrate 590 (the surface side facing the substrate 701) are shown by solid lines .

[0299] For the touch sensor 595, for example, a capacitance type touch sensor can be applied. As the capacitance type, there are a surface capacitance type, a projected capacitance type, etc. Here, the case where a projected capacitance type touch sensor is applied is shown.

[0300] As the projected capacitance type, mainly due to the difference in the driving method, there are a self-capacitance method and a mutual-capacitance method . Using the mutual-capacitance method enables simultaneous multi-point detection, which is preferable.

[0301] Note that various sensors capable of detecting the proximity or contact of a detection target such as a finger can be applied to the touch sensor 595 .

[0302] The projected capacitance type touch sensor 595 has electrodes 591 and electrodes 592. Electrodes 591 is electrically connected to any one of a plurality of wirings 598, and the electrode 592 is electrically connected to any one of the other plurality of wirings 598. is electrically connected to any one of the others.

[0303] As shown in FIGS. 19(A) and 19(B), the electrode 592 has a shape in which a plurality of quadrilaterals repeatedly arranged in one direction are connected at corners. has a shape in which a plurality of quadrilaterals repeatedly arranged in one direction are connected at corners.

[0304] The electrode 591 is quadrilateral and is repeatedly arranged in a direction intersecting the direction in which the electrode 592 extends. Note that the plurality of electrodes 591 do not necessarily have to be arranged in a direction orthogonal to one electrode 592, and may be arranged at an angle of less than 90 degrees. Note that the plurality of electrodes 591 do not necessarily have to be arranged in a direction orthogonal to one electrode 592, and may be arranged at an angle of less than 90 degrees.

[0305] The wiring 594 is provided so as to intersect the electrode 592. The wiring 594 electrically connects two electrodes 591 sandwiching the electrode 592. At this time, a shape in which the area of the intersection portion of the electrode 592 and the wiring 594 is as small as possible is preferable. Thereby, the area of the region where no electrode is provided can be reduced, and unevenness in transmittance can be reduced. As a result, unevenness in the luminance of light transmitted through the touch sensor 595 can be reduced. The wiring 594 is provided so as to intersect the electrode 592. The wiring 594 electrically connects two electrodes 591 sandwiching the electrode 592. At this time, a shape in which the area of the intersection portion of the electrode 592 and the wiring 594 is as small as possible is preferable. Thereby, the area of the region where no electrode is provided can be reduced, and unevenness in transmittance can be reduced. As a result, unevenness in the luminance of light transmitted through the touch sensor 595 can be reduced. The area of the region where no electrode is provided can be reduced, and unevenness in transmittance can be reduced. As a result, unevenness in the luminance of light transmitted through the touch sensor 595 can be reduced. The area of the region where no electrode is provided can be reduced, and unevenness in transmittance can be reduced. As a result, unevenness in the luminance of light transmitted through the touch sensor 595 can be reduced. The area of the region where no electrode is provided can be reduced, and unevenness in transmittance can be reduced. As a result, unevenness in the luminance of light transmitted through the touch sensor 595 can be reduced.

[0306] Note that the shapes of the electrodes 591 and 592 are not limited to this, and can take various shapes. For example, a configuration may be adopted in which a plurality of electrodes 591 are arranged so as to minimize gaps, and a plurality of electrodes 592 are provided at intervals through an insulating layer so as to form a region that does not overlap with the electrodes 591. At this time, it is preferable to provide dummy electrodes that are electrically insulated from these between two adjacent electrodes 592 because the area of regions with different transmittances can be reduced. For example, a plurality of electrodes 591 are arranged so as to minimize gaps, and a plurality of electrodes 592 are provided at intervals through an insulating layer so as to form a region that does not overlap with the electrodes 591. Note that the shapes of the electrodes 591 and 592 are not limited to this, and can take various shapes. For example, a configuration may be adopted in which a plurality of electrodes 591 are arranged so as to minimize gaps, and a plurality of electrodes 592 are provided at intervals through an insulating layer so as to form a region that does not overlap with the electrodes 591. At this time, it is preferable to provide dummy electrodes that are electrically insulated from these between two adjacent electrodes 592 because the area of regions with different transmittances can be reduced. At this time, it is preferable to provide dummy electrodes that are electrically insulated from these between two adjacent electrodes 592 because the area of regions with different transmittances can be reduced.

[0307] A more specific configuration example of the touch sensor 595 will be described later.

[0308] As shown in FIG. 20(A), the touch panel 505A has a substrate 701, an adhesive layer 703, an insulating layer 705, a substrate 711, an adhesive layer 713, and an insulating layer 715. Further, the substrate 701 and the substrate 711 are bonded together by an adhesive layer 360. The adhesive layer 597 bonds the substrate 590 to the substrate 711 so that the touch sensor 595 overlaps the display unit 501. The adhesive layer 597 has translucency.

[0309] The electrodes 591 and 592 are formed using a conductive material having translucency. As the conductive material having translucency, conductive oxides such as indium oxide, indium tin oxide, indium zinc oxide, zinc oxide, and zinc oxide added with gallium can be used. In addition, a film containing graphene can also be used. The film containing graphene can be formed, for example, by reducing a film containing graphene oxide formed in a film shape. Examples of the reduction method include a method of applying heat.

[0310]

[0311] It is desirable that the resistance values of the conductive films such as the electrodes 591, 592, and the wiring 594, that is, the materials used for the wirings and electrodes constituting the touch panel, are low. As an example, ITO, indium zinc oxide, ZnO, silver, copper, aluminum, carbon nanotubes, graphene, etc. may be used. Further, metal nanowires formed using a large number of very thin (for example, having a diameter of several nanometers) conductors may be used. Since the transmittance is high, metal nanowires, carbon nanotubes, graphene, etc. may be used for the electrodes used for the display elements, for example, pixel electrodes and common electrodes.

[0312] After forming a conductive material having translucency on the substrate 590 by sputtering, unnecessary portions are removed by various patterning techniques such as photolithography to form the electrodes 59 1 and the electrode 592.

[0313] The electrodes 591 and 592 are covered with an insulating layer 593. Also, an opening reaching the electrode 591 is provided in the insulating layer 593, and the wiring 594 electrically connects the adjacent electrodes 591. Since the translucent conductive material can increase the aperture ratio of the touch panel, it can be suitably used for the wiring 594. Also, a material having higher conductivity than the electrodes 591 and 592 can be suitably used for the wiring 594 because it can reduce the electrical resistance.

[0314] Note that an insulating layer covering the insulating layer 593 and the wiring 594 can be provided to protect the touch sensor 595.

[0315] Also, the connection layer 599 electrically connects the wiring 598 and the FPC 509(2).

[0316] The display unit 501 has a plurality of pixels arranged in a matrix. Since the pixels are the same as in Configuration Example 1, the description thereof is omitted.

[0317] Note that various transistors can be applied to the touch panel. The configurations in the case of applying a bottom gate type transistor are shown in FIGS. 20(A) and (B).

[0318] For example, a semiconductor layer including an oxide semiconductor, amorphous silicon, etc. can be applied to the transistors 302t and 303t shown in FIG. 20(A).

[0319] For example, a semiconductor including polycrystalline silicon crystallized by a process such as laser annealing layer can be applied to transistors 302t and 303t shown in FIG. 20(B). This is possible.

[0320] Also, the configuration in the case of applying a top-gate type transistor is shown in FIG. 20(C).

[0321] For example, a semiconductor layer including a single crystal silicon film transferred from a polycrystalline silicon or single crystal silicon substrate, etc. can be applied to transistors 302t and 303t shown in FIG. 20(C). This is possible.

[0322] [Configuration Example 3] FIG. 21 is a cross-sectional view of touch panel 505B. The touch panel 505B described in this embodiment is different from touch panel 505A of Configuration Example 2 in that it displays the supplied image information on the side where the transistors are provided, the touch sensor is provided on the substrate 701 side of the display unit, and FPC 509(2) is provided on the same side as FPC 509(1). Here, different configurations will be described in detail, and parts where the same configurations can be used will refer to the above description. will refer to the above description. will refer to the above description.

[0323] The coloring layer 367R is located at a position overlapping the light-emitting element 350R. Also, the light-emitting element 350R shown in FIG. 21(A) emits light toward the side where the transistor 302t is provided. As a result a part of the light emitted by the light-emitting element 350R passes through the coloring layer 367R and is emitted outside the light-emitting module 380R in the direction of the arrow shown in the figure. This is possible.

[0324] Touch panel 505B has a light-shielding layer 367BM in the direction of light emission. The 7BM is provided so as to surround a colored layer (for example, the colored layer 367R).

[0325] The touch sensor 595 is provided on the substrate 701 side, not on the substrate 711 side (Fig. 21 (A)).

[0326] The adhesive layer 597 attaches the substrate 590 to the substrate 70 1 so that the touch sensor 595 overlaps the display unit. The adhesive layer 597 has translucency.

[0327] Note that the configuration in the case of applying a bottom gate type transistor to the display unit 501 is shown in Fig. 21 (A) and (B).

[0328] For example, a semiconductor layer containing an oxide semiconductor, amorphous silicon, etc. can be applied to the transistors 302t and 303t shown in Fig. 21(A). That is, it can be applied to the transistors 302t and 303t.

[0329] For example, a semiconductor layer containing polycrystalline silicon, etc. can be applied to the transistors 302 t and 303t shown in Fig. 21(B).

[0330] Also, the configuration in the case of applying a top gate type transistor is shown in Fig. 21(C).

[0331] For example, a semiconductor layer containing polycrystalline silicon or a transferred single crystal silicon film, etc. can be applied to the transistors 302t and 303t shown in Fig. 21 (C).

[0332] [Configuration Example of Touch Sensor] Hereinafter, a more specific configuration example of the touch sensor 595 will be described with reference to the drawings. to be.

[0333] Fig. 22(A) shows a schematic top view of the touch sensor 595. The touch sensor 595 has a base The board 590 has a plurality of electrodes 531, a plurality of electrodes 532, a plurality of wirings 541, and a plurality of wirings 54 2. Further, on the substrate 590, an FPC 550 is provided which is electrically connected to each of the plurality of wirings 541 and the plurality of wirings 542.

[0334] FIG. 22(B) shows an enlarged view of the region surrounded by the dashed-dotted line in FIG. 22(A). The electrode 531 has a shape in which a plurality of diamond-shaped electrode patterns are connected in the horizontal direction of the paper surface. The diamond-shaped electrode patterns arranged in a row are each electrically connected. Also, similarly, the electrode 532 has a shape in which a plurality of diamond-shaped electrode patterns are connected in the vertical direction of the paper surface, and the diamond-shaped electrode patterns arranged in a row are each electrically connected. Further, the electrode 531 and the electrode 532 partially overlap and cross each other. At this intersection, an insulator is sandwiched so that the electrode 531 and the electrode 532 do not electrically short-circuit.

[0335] Also, as shown in FIG. 22(C), the electrode 532 may be composed of a plurality of electrodes 533 having a diamond shape and a bridge electrode 534. The island-shaped electrodes 533 are arranged side by side in the vertical direction of the paper surface, and two adjacent electrodes 533 are electrically connected by the bridge electrode 534. By adopting such a configuration, the electrode 533 and the electrode 531 can be formed simultaneously by processing the same conductive film. Therefore, variations in their film thicknesses can be suppressed, and variations in the resistance values and light transmittance of the respective electrodes depending on the location can be suppressed. Here, the electrode 532 has a configuration having the bridge electrode 534, but the electrode 53 1 may also have such a configuration.

[0336] ​​​​​​​​​Also, as shown in FIG. 22(D), the rhombus of the electrodes 531 and 532 shown in FIG. 22(B) may be shaped such that the inside of the electrode pattern is hollowed out, leaving only the contour portion. In this case, when the widths of the electrodes 531 and 532 are thin enough not to be visually recognized by the user, as described later, a light-shielding material such as metal or alloy may be used for the electrodes 531 and 532. Also, the electrode 531 or 532 shown in FIG. 22(D) may be configured to have the above bridge electrode 534.

[0337] One electrode 531 is electrically connected to one wiring 541. Also, one electrode 53 2 is electrically connected to one wiring 542.

[0338] Here, when the touch sensor 595 is overlaid on the display surface of the display panel to form a touch panel, it is preferable to use a conductive material having translucency for the electrodes 531 and 532. Also, when using a translucent conductive material for the electrodes 531 and 532 and extracting light from the display panel through the electrode 531 or 532, it is preferable to arrange a conductive film containing the same conductive material as a dummy pattern between the electrodes 531 and 532. In this way, by filling a part of the gap between the electrodes 531 and 532 with a dummy pattern, variations in light transmittance can be reduced. As a result, unevenness in the luminance of the light transmitted through the touch sensor 595 can be reduced.

[0339] As the translucent conductive material, conductive oxides such as indium oxide, indium tin oxide, indium zinc oxide, zinc oxide, and zinc oxide added with gallium are used. It is possible. Note that a film containing graphene can also be used. The film containing graphene can be formed, for example, by reducing a film containing graphene oxide formed in a film shape. Examples of the reduction method include heating. For example, it can be formed by reducing a film containing graphene oxide formed in a film shape. Examples of the reduction method include heating.

[0340] Alternatively, a metal or alloy thin enough to have translucency can be used. For example, metals such as gold, silver, platinum, magnesium, nickel, tungsten, chromium, molybdenum, iron, cobalt, copper, palladium, or titanium, or alloys containing these metals can be used. Alternatively, nitrides of these metals or alloys (for example, titanium nitride) may be used. Further, a laminated film obtained by laminating two or more of the conductive films containing the above-described materials may be used. gold, silver, platinum, magnesium, nickel, tungsten, chromium, molybdenum, iron, cobalt copper, palladium, or titanium, or alloys containing these metals can be used. Alternatively, nitrides of these metals or alloys (for example, titanium nitride) may be used. Further, a laminated film obtained by laminating two or more of the conductive films containing the above-described materials may be used.

[0341] Further, for the electrodes 531 and 532, a conductive film processed to be thin enough not to be visually recognized by the user may be used. For example, by processing such a conductive film into a lattice shape (mesh shape), high conductivity and high visibility of the display device can be obtained. At this time, the conductive film preferably has a portion with a width of 30 nm or more and 100 μm or less, preferably 50 nm or more and 50 μm or less, more preferably 50 nm or more and 20 μm or less. In particular, a conductive film having a pattern width of 10 μm or less is preferable because it is extremely difficult for the user to visually recognize. For example, by processing such a conductive film into a lattice shape (mesh shape), high conductivity and high visibility of the display device can be obtained. At this time, the conductive film preferably has a portion with a width of 30 nm or more and 100 μm or less, preferably 50 nm or more and 50 μm or less, more preferably 50 nm or more and 20 μm or less. nm or more and 100 μm or less, preferably 50 nm or more and 50 μm or less, more preferably 50 n m or more and 20 μm or less. In particular, a conductive film having a pattern width of 10 μm or less is preferable because it is extremely difficult for the user to visually recognize. width is preferably used because it is extremely difficult for the user to visually recognize.

[0342] As an example, FIGS. 23(A) to (D) show schematic diagrams of a part of the electrode 531 or the electrode 532 (the part surrounded by the dashed circle in FIG. 22(B)) enlarged. FIG. 23(A (B) shows an example in the case of using a lattice-shaped conductive film 561. At this time, by arranging the conductive film 561 so as not to overlap with the display element included in the display device, light from the display device is blocked. FIG. 23(A shows an example in the case of using a lattice-shaped conductive film 561. At this time, by arranging the conductive film 561 so as not to overlap with the display element included in the display device, light from the display device is blocked.​ This is preferable because it does not occur. In that case, the direction of the grating is set to the same direction as the array of display elements, and it is preferable that the period of the grating is an integral multiple of the period of the array of display elements.

[0343] Also, FIG. 23(B) shows an example of a grating-shaped conductive film processed so that triangular openings are formed. 562. By adopting such a configuration, the resistance can be made lower than in the case shown in FIG. 23(A).

[0344] Also, as shown in FIG. 23(C), the conductive film 56 3 may have a pattern shape without periodicity. By adopting such a configuration, moiré can be suppressed when it is superimposed on the display portion of the display device. Here, moiré refers to an interference pattern that occurs due to diffraction or interference when external light or the like passes through or is reflected by a conductive film or the like provided at fine intervals with a fine width.

[0345] Also, conductive nanowires may be used for the electrodes 531 and 532. FIG. 23(D ) shows an example of the case where the nanowires 564 are used. By dispersing them at an appropriate density so that adjacent nanowires 564 contact each other, a two-dimensional network is formed, and it can function as a highly light-transmissive conductive film. For example, the average value of the diameter is 1 nm or more and 100 nm or less, preferably 5 nm or more and 50 nm or less, more preferably 5 n m or more and 25 nm or less of nanowires can be used. As the nanowires 564, A g nanowires, metal nanowires such as Cu nanowires and Al nanowires, or carbon nanotubes can be used. For example, in the case of Ag nanowires, the light transmittance is 8 ​​​​Above 9%, a sheet resistance value of 40 or more and 100 or less Ω / □ can be achieved.

[0346] In FIG. 22(A) and the like, as the upper surface shape of the electrodes 531 and 532, an example in which a plurality of rhombuses are connected in one direction is shown. However, the shapes of the electrodes 531 and 532 are not limited to this, and various upper surface shapes such as a strip shape (rectangular shape), a strip shape having a curve, and a zigzag shape can be used. Also, in the above description, it is shown that the electrodes 531 and 532 are arranged so as to be orthogonal to each other, but they do not necessarily have to be arranged orthogonally, and the angle formed by the two electrodes may be less than 90 degrees.

[0347] In FIGS. 24(A) to (C), examples in the case where electrodes 536 and 537 having a thin wire-like upper surface shape are used instead of the electrodes 531 and 532 are shown. In FIG. 24(A), an example in which linear electrodes 536 and 537 are arranged in a lattice pattern is shown.

[0348] Also, FIG. 24(B) shows an example in the case where the electrodes 536 and 537 have a zigzag-shaped upper surface shape. At this time, as shown in FIG. 24(B), instead of overlapping the center positions of the respective linear portions, by arranging them relatively shifted, the length of the portion where the electrodes 536 and 537 approach each other in parallel and face each other can be increased, and the capacitance between the electrodes is increased. This is preferable because the detection sensitivity is improved. Alternatively, as shown in FIG. 24(C), if the upper surface shape of the electrodes 536 and 537 is such that a part of the linear portion of the zigzag shape protrudes, even if the center positions of the linear portions are arranged to overlap, the length of the facing portion can be increased, and thus the capacitance between the electrodes can be increased. ​​​​​​​​

[0349] Enlarged views of the area enclosed by the dashed line in Fig. 24(B) are shown in Fig. 25(A), (B), and (C). Enlarged views of the areas enclosed by dashed lines in 4(C) are shown in Figs. 25(D), 25(E), and 25(F), respectively. Also shown in each figure are an electrode 536, an electrode 537, and an intersection 538 where these intersect. As shown in Figs. 25(B) and (E), the electrodes 536 and The straight portions of the electrodes 537 may be meandering so as to have corners, or as shown in FIG. As shown in (C) and (F), the shape may be a meandering shape with continuous curves.

[0350] [Configuration example 4] As shown in FIG. 26, the touch panel 500TP has a display unit 500 and an input unit 600 overlapped therewith. 27 is a cross-sectional view taken along dashed line Z1-Z2 shown in FIG.

[0351] The individual elements constituting the touch panel 500TP will be described below. These components cannot be clearly separated, and one component may serve as another or may include a part of another. In addition, the touch panel 500TP in which the input unit 600 is superimposed on the display unit 500 is also called a touch panel.

[0352] The input section 600 has a plurality of detection units 602 arranged in a matrix. The input section 600 includes a selection signal line GL, a control line RES, a signal line DL, and the like.

[0353] The selection signal line GL and the control line RES are arranged in the row direction (indicated by the arrow R in the figure). The signal line DL is electrically connected to the detection unit 602. ) is electrically connected to a plurality of sensing units 602 arranged in a row.

[0354] The detection unit 602 detects something in proximity or contact therewith and supplies a detection signal. For example, it detects capacitance, illuminance, magnetic force, radio waves, pressure, etc., and supplies information based on the detected physical quantity. Specifically, a capacitive element, a photoelectric conversion element, a magnetic detection element, a piezoelectric element, a resonator, etc. can be used as the detection element.

[0355] The detection unit 602 detects, for example, a change in capacitance between something in proximity or contact therewith.

[0356] In the atmosphere, when something having a dielectric constant larger than that of the atmosphere, such as a finger, approaches the conductive film, the capacitance between the finger and the conductive film changes. The change in this capacitance can be detected to supply detection information.

[0357] For example, with a change in capacitance, charge distribution is caused between the capacitive element, and the voltage of the electrodes at both ends of the capacitive element changes. This change in voltage can be used as the detection signal.

[0358] The detection unit 602 has a detection circuit. The detection circuit is electrically connected to a selection signal line GL, a control line RES or a signal line DL, etc.

[0359] The detection circuit has a transistor and / or a detection element, etc. For example, a conductive film and a capacitive element electrically connected to the conductive film can be used in the detection circuit. Also, a capacitive element and a transistor electrically connected to the capacitive element can be used in the detection circuit.

[0360] The detection circuit includes, for example, an insulating layer 653, a first electrode 651 sandwiching the insulating layer 653, and A capacitor element 650 having the first electrode 651 and the second electrode 652 can be used (FIG. 27). The voltage between the electrodes of the capacitor element 650 changes depending on what approaches a conductive film electrically connected to one of the electrodes.

[0361] The detection unit 602 has a switch that can be set to a conductive state or a non-conductive state based on a control signal. For example, the transistor M12 can be used as the switch.

[0362] Also, a transistor for amplifying the detection signal can be used in the detection unit 602.

[0363] Transistors that can be fabricated in the same process can be used for the transistor that amplifies the detection signal and the switch. Thereby, an input unit 600 with a simplified manufacturing process can be provided.

[0364] Also, the detection unit 602 has a plurality of window portions 667 arranged in a matrix. The window portion 667 transmits visible light, and a light-shielding layer BM may be disposed between the plurality of window portions 667.

[0365] The touch panel 500TP has a colored layer at a position overlapping the window portion 667. The colored layer transmits light of a predetermined color. Note that the colored layer can be referred to as a color filter. For example, a colored layer 367B that transmits blue light, a colored layer 367G that transmits green light, or a colored layer 367R that transmits red light can be used. Also, a colored layer that transmits yellow light or a colored layer that transmits white light may be used.

[0366] The display unit 500 has a plurality of pixels 302 arranged in a matrix. The pixel 302 ​​​​​​​It is arranged so as to overlap with the window portion 667 of the input unit 600. The pixel 302 may be arranged with higher fineness compared to the detection unit 602. Since the pixel is the same as in Configuration Example 1, the description is omitted.

[0367] The touch panel 500TP includes an input unit 600 having a window portion 667 that transmits visible light and a plurality of detection units 602 arranged in a matrix, and a display unit 500 having a plurality of pixels 302 that overlap with the window portion 667. It is configured to include a coloring layer between the window portion 667 and the pixel 302. Also, a switch is provided for each detection unit to reduce interference to other detection units. As a result, it is possible to supply the detection information detected by each detection unit together with the position information of the detection unit. Also, it is possible to supply the detection information in association with the position information of the pixel for displaying an image. Further, by bringing the signal line into a non-conductive state with the detection unit that does not supply the detection information, interference to the detection unit that supplies the detection signal can be reduced. As a result, a novel touch panel 500TP excellent in convenience or reliability can be provided.

[0368]

[0369] For example, the input unit 600 of the touch panel 500TP can detect detection information and supply it together with the position information. Specifically, the user of the touch panel 500TP can use a finger or the like that touches the input unit 600 as a pointer to perform various gestures (such as tap, drag, swipe, or pinch-in).

[0370] The input unit 600 can detect a finger or the like that is close to or in contact with the input unit 600 and supply detection information including the detected position or trajectory. ​​​​​​​​​​​​

[0371] The computing device judges whether the supplied information satisfies a predetermined condition based on a program or the like. and executes the command associated with the given gesture.

[0372] Thus, the user of the input unit 600 provides a predetermined gesture using a finger or the like, The gesture may cause the computing device to execute an instruction associated with the gesture.

[0373] For example, the input unit 600 of the touch panel 500TP first supplies detection information to one signal line. A detection unit X is selected from the plurality of detection units that can be supplied. The signal line of the other detection units except for the detection unit X is put into a non-conductive state. This makes it possible to reduce interference with the detection unit X caused by other detection units.

[0374] Specifically, the interference caused by the detection elements of other detection units on the detection elements of detection unit X. This can reduce interference.

[0375] For example, a capacitance element and a conductive film to which one electrode of the capacitance element is electrically connected are used as a detection element. In the case of using the detection unit X, the potential of the conductive film of the other detection unit is The interference with the electric potential of the conductive film can be reduced.

[0376] This allows the Touch Panel 500TP to be used with a sensing unit regardless of its size. For example, it can be used in a handheld device. There are various sizes of tags, from ones that can be used for writing to ones that can be used for electronic whiteboards. We can provide Touch Panel 500TP.

[0377] Also, the touch panel 500TP can be in a folded state and an unfolded state. And even when there are different interferences to the detection unit X caused by other detection units in the folded state and the unfolded state, the detection unit can be driven without depending on the state of the touch panel 500TP to supply detection information.

[0378] Also, the display unit 500 of the touch panel 500TP can be supplied with display information. For example, the arithmetic unit can supply display information.

[0379] In addition to the above configuration, the touch panel 500TP can also have the following configuration.

[0380] The touch panel 500TP may have a drive circuit 603g or a drive circuit 603d. Also, it may be electrically connected to the FPC1.

[0381] The drive circuit 603g can supply a selection signal at a predetermined timing, for example. Specifically, the selection signal is supplied to each selection signal line GL in a predetermined order. Also, various circuits can be used for the drive circuit 603g. For example, a shift register, a flip-flop circuit, a combination circuit, etc. can be used.

[0382] The drive circuit 603d supplies detection information based on the detection signal supplied by the detection unit. Also, various circuits can be used for the drive circuit 603d. For example, a circuit that can form a source follower circuit or a current mirror circuit by being electrically connected to a detection circuit disposed in the detection unit can be used for the drive circuit 603d. Also, ​​​It may also have an analog-to-digital conversion circuit that converts the detection signal into a digital signal.

[0383] The FPC1 supplies a timing signal, a power supply potential, etc., and is supplied with the detection signal.

[0384] The touch panel 500TP may have a drive circuit 503g, a drive circuit 503s, a wiring 311, or a terminal 319. It may also be electrically connected to the FPC2.

[0385] Furthermore, it may have a protective layer 670 that prevents the occurrence of scratches and protects the touch panel 500TP. For example, a ceramic coating layer or a hard coating layer can be used as the protective layer 670. Specifically, a layer containing aluminum oxide or a UV curable resin can be used.

[0386] In addition, when realizing a transflective liquid crystal display or a reflective liquid crystal display, part or all of the pixel electrodes may have the function of a reflective electrode. For example, part or all of the pixel electrodes may have aluminum, silver, etc.

[0387] Also, it is possible to provide a memory circuit such as an SRAM under the reflective electrode. Thereby, furthermore, the power consumption can be reduced. Also, a suitable configuration for the display element to be applied can be selected from various pixel circuits and used.

[0388] The touch panel described in this embodiment can be used instead of the display panel 100 that constitutes the display device 10 of Embodiment 1. In that case, a plurality of FPCs connected to the touch panel, such as the touch panel 390 and the touch panel 505B, are taken out from one direction, like A touch panel with such a configuration can be preferably used. Instead of the display panel 100, When a touch panel is used, the display device 10 can also be called an input / output device.

[0389] Also, an adhesive layer 107 for bonding a plurality of touch panels to the substrate 106 is provided such that the heights of the upper surfaces in the touch sensors 595 (or input units 600) of the respective touch panels are made to coincide, and preferably, the upper surface and the substrate 106 are provided to be parallel. By making the distances between the surface of the input / output device ( that is, the surface of the substrate 106) and the touch sensors 595 (or input units 600) of the respective touch panels equal, the location dependency (also called in-plane non-uniformity) of the detection sensitivity of the input / output device can be reduced. force unit 600) of each touch panel equal, the location dependency (also called in-plane non-uniformity) of the detection sensitivity of the input / output device can be reduced.

[0390] This embodiment can be appropriately combined with other embodiments.

Example

[0391] In this example, an example of manufacturing a display device according to one aspect of the present invention is shown.

[0392] The display device 20 has four display panels 80 arranged in a 2×2 matrix (two each in the horizontal and vertical directions). The specifications of the display panel 80 in this example are shown in Table 1. Also, a photograph of the display panel 80 displaying an image is shown in FIG. 28(A).

[0393]

Table 1

[0394] FIG. 29 is a photograph of the display device 20 displaying an image. The horizontal direction and the vertical direction in FIG. 29 respectively correspond to the X-axis direction and the Y-axis direction in FIGS. 1(A) and 4(A). The horizontal and vertical directions in FIG. 29 respectively correspond to the X-axis direction and the Y-axis direction in FIGS. 1(A) and 4(A). ​​It is. The display device 20 also includes a plate 90, a stage 91, a drive circuit 62, and adjustment means 6 3, each having four, and includes a frame 21.

[0395] FIGS. 30(A) and 30(B) show a photograph of one of the four element groups 60 that make up the display device 20. The element group 60 is one in which the display panel 80 is fixed to the plate 90 and is connected to the stage 91. FIG. 30(A) is a photograph of the element group 60 viewed obliquely from the front so that the display portion 41 of the display panel 80 can be seen. FIG. 30(B) is a photograph of the element group 60 viewed obliquely from the rear. As shown in FIG. 30(A), the display panel 80 has transparent portions 82 at positions adjacent to two sides of the display portion 41. Also, as shown in FIG. 30(B), the display panel 80 is fixed to the plate 90 such that a part of the transparent portion 82 and the display portion 41 protrude from two sides of the plate 90. With such a configuration, the display device 20 can arrange the display portions 41 of the four display panels 80 seamlessly, and can display an image or video without an unnatural seam as one display area (see FIG. 29). In this embodiment, the width of the transparent portion 82 is about 2 mm (see FIG. 28(B)). Note that FIG. 28(B) is an enlarged photograph of the area surrounded by the broken line in FIG. 28(A). As shown in FIG. 30(B), the notch 51, the fastener 52, and the guide 53 provided in the plate 90 can precisely align the horizontal and vertical positions in the connection between the plate 90 and the stage 91. In the display device 20, the stage 91 is fixed to the frame 21 via the adjustment means 6 3. The adjustment means 63 is the same as in the first embodiment.

[0396] As shown in FIG. 30(A), the display panel 80 has transparent portions 82 at positions adjacent to two sides of the display portion 41. Also, as shown in FIG. 30(B), the display panel 80 is fixed to the plate 90 such that a part of the transparent portion 82 and the display portion 41 protrude from two sides of the plate 90. By having such a configuration, the display device 20 can arrange the display portions 41 of the four display panels 80 seamlessly, and can display an image or video without an unnatural seam as one display area (see FIG. 29). In this embodiment, the width of the transparent portion 82 is about 2 mm (see FIG. 28(B)). Note that FIG. 28(B) is an enlarged photograph of the area surrounded by the broken line in FIG. 28(A). and can display an image or video without an unnatural seam as one display area (see FIG. 29). In this embodiment, the width of the transparent portion 82 is about 2 mm (see FIG. 28(B)). Note that FIG. 28(B) is an enlarged photograph of the area surrounded by the broken line in FIG. 28(A). (see FIG. 28(B)). Note that FIG. 28(B) is an enlarged photograph of the area surrounded by the broken line in FIG. 28(A). is.

[0397] Also, as shown in FIG. 30(B), the notch 51, the fastener 52, and the guide 53 provided in the plate 90 can precisely align the horizontal and vertical positions in the connection between the plate 90 and the stage 91. In the display device 20, the stage 91 is fixed to the frame 21 via the adjustment means 6 3. The adjustment means 63 is the same as in the first embodiment. 3 is fixed to the frame 21 via the adjustment means 63. The adjustment means 63 is the same as in the first embodiment. It uses a combination of an X-axis stage, a Y-axis stage, and a gonio stage. With such a configuration, the display device 20 can ensure that the display portions 41 of the four display panels 80 are arranged without gaps and in parallel, and that there is no display shift between the display portions 41 of adjacent display panels 80. The position of the display panel 80 can be adjusted with high precision. Fig. 31(A) shows a magnified photograph of the vicinity of the seam when the display device 20 is displaying an image. The region surrounded by the dashed line in Fig. 31(A) includes the seam between the display portions 41. It can be confirmed from Fig. 31(A) that the display portions 41 of the four display panels 80 in the display device 20 are arranged such that there is no display shift at the seam.

[0398] Note that the plate 90 may be provided with a fixture on the first surface. When the display panel 80 has a COF (Chip On Film), the COF can be fixed to the first surface of the plate 90 by the fixture. Fig. 34 is a photograph of the plate 90 provided with the fixture 54 near the convex curved surface of the first surface and the display panel 80 fixed to the plate 90. The fixture 54 consists of a member 54a and a member 54b. The material of the member 54a is not particularly limited, and the member 54b is preferably an insulator. The member 54a uses the same material as the plate 90. The member 54b uses a plastic hook. By fixing the COF of the display device 20 to the member 54b with a screw or the like, it is possible to prevent the display panel 80 from being damaged when transporting the plate 90 to which the display panel 80 is fixed.

[0399] In addition, the drive circuit 62 has a function of adjusting the color tone, brightness, etc. in the display of the display panel 80. Therefore, variations in the display capabilities of the individual display panels 80 can be corrected. Thus, the display device 20 can perform display with high display quality while suppressing variations in color tone and brightness in the display unit 11C.

[0400] Fig. 31(B) shows a photograph of the display device 20 viewed obliquely from the front with respect to the display unit 11C. As shown in Fig. 31(B), the first portion 44 of the display panel 80 is bent along the convex curved surface of the plate 50 toward the back side with respect to the display surface of the display panel 80. With such a configuration, the connection between the drive circuit 62 and the external electrode 46 disposed on the back side of the display panel 80 can be facilitated. In addition, since the external electrode 46 or the like does not interfere when the display panels 80 are stacked, the display surface of the display unit 11C can be configured to be substantially flat without being stepped. Note that, in Fig. 31(B), the lower (rear) display panel is denoted as 80a, and the upper (front) display panel is denoted as 80b.

[0401] The display device 20 has a size of 27 inches diagonal for the display unit 11C (the size of the display unit 41 of one display panel 80 is 13.5 inches diagonal), 2560×1440 effective pixels, a pixel size of 234μm×234μm, a resolution of 108ppi, and an aperture ratio of 61.0%. The scanner driver is built-in, and the source driver is externally attached using a COF.

[0402] Fig. 32 shows a photograph of a state in which a display device 10 having 36 display panels 80 in a 6×6 matrix (six each in the horizontal and vertical directions) in total according to this embodiment is displaying an image. Fig. 33(A) shows a photograph of the back side of the display surface of the display device 10, and Fig. 33(B) shows Fig. ​​​​The photograph shows an enlarged view of the area enclosed by the dotted line in FIG. 33(A). 6) with the cable 64 connected to the drive circuit 62 removed.

[0403] The display device 10 includes a plate 90, a stage 91, a driving circuit 62, and an adjustment means 63. The display device 10 has 36 video signals and a frame 21. In this embodiment, the video output unit 22 includes a video splitter 22 and two video output units 23 (not shown). The means 23 is a non-compression disk recorder. The display device 10 includes a display unit 1 The 1D size is 81 inches diagonally, and the effective pixel count is 7680 x 4320 (8K).

[0404] In this embodiment, the light emitting element included in the display unit 41 is a tandem (stacked) element that emits white light. The light-emitting element has a top emission structure. The light is extracted to the outside of the light-emitting panel through a color filter.

[0405] The transistor is CAAC-OS (C Axis Aligned Crystal The transistors used were made of 100% ZnO (Line Oxide Semiconductor). Unlike amorphous materials, CAAC-OS has fewer defect levels, which improves the reliability of transistors. In addition, CAAC-OS does not require laser crystallization, making it possible to grow large-area glass. CAAC-OS can be formed uniformly even on a silicon substrate. Therefore, when a flexible display panel is bent, the stress applied to the CAAC-OS film is Less likely to crack.

[0406] CAAC-OS is an oxide semiconductor with a c-axis oriented approximately perpendicular to the film surface. As the crystal structure of the semiconductor, there are also various structures different from single crystals, such as nano-crystalline aggregates of nano-scale, nano-cryst al(nc), etc. It has been confirmed that such structures exist. CA AC-OS has lower crystallinity than single crystals and higher crystallinity than nc.

[0407] In this embodiment, a channel-etch type transistor using an In-Ga-Zn based oxide was used. The transistor was fabricated by a process at a temperature of less than 500°C on a glass substrate.

[0408] As shown in FIGS. 29 and 32, according to one aspect of the present invention, a large display device in which the seam of the display unit is difficult for a user to recognize can be realized.

[0409] This embodiment can be implemented in appropriate combination with at least a part of the embodiments described in this specification.

Description of Reference Numerals

[0410] 10 Display device 11A Display unit 11B Display unit 11C Display unit 11D Display unit 20 Display device 20A Display device 20B Display device 21 Frame 21A Frame 21B Frame 22 Video signal splitter 23 Video output means 30 Display panel 30a Display panel 30b Display panel 31 Pixel 31a Pixel 31b Pixel 32 Transparent portion 32b Transparent portion 33c operation circuit 33d operation circuit 34c wiring 34d wiring 35 wiring 36 substrate 37 substrate 38 adhesive layer 40 display panel 40a display panel 40b display panel 41 display section 41a display section 41b display section 42 transparent section 42b transparent section 43 operation circuit section 43a operation circuit section 44 first part 44a first part 44b first part 45 terminal 45b terminal 46 external electrode 46a external electrode 46b external electrode 50 plate 50a plate 50b plate 52 fastener 52a fastener 53 guide 53a guide 54 fixture 54a member 54b member 60 element group 61 stage 61a stage 61b stage 62 drive circuit 62a drive circuit 62b drive circuit 63 adjustment means 63a adjustment means 63b adjustment means 64 cable 64a cable 64b cable 65 cable 80 Display panel 80a Display panel 80b Display panel 82 Transparent part 82b Transparent part 90 Plate 90a Plate 90b Plate 91 Stage 91a Stage 91b Stage 100 Display panel 106 Substrate 107 Adhesive layer 301 Display part 302 Pixel 302B Sub-pixel 302G Sub-pixel 302R Sub-pixel 302t Transistor 303c Capacitance 303g(1) Scanning line drive circuit 303g(2) Imaging pixel drive circuit 303s(1) Image signal line drive circuit 303s(2) Imaging signal line drive circuit 303t Transistor 304 Gate 308 Imaging pixel 308p Photoelectric conversion element 308t Transistor 309 FPC 311 Wiring 319 Terminal 321 Insulating layer 328 Partition wall 329 Spacer 350R Light-emitting element 351R Lower electrode 352 Upper electrode 353 EL layer 353a EL layer 353b EL layer 354 Intermediate layer 360 Adhesive layer 367B Coloring layer 367BM Light-shielding layer 367G Coloring layer 367p Anti-reflection layer 367R Coloring layer 380B Light-emitting module 380G Light-emitting module 380R Light-emitting module 390 Touch panel 500 Display unit 500TP Touch panel 501 Display unit 503g Drive circuit 503s Drive circuit 505A Touch panel 505B Touch panel 509(1) FPC 509(2) FPC 531 Electrode 532 Electrode 533 Electrode 534 Bridge electrode 536 Electrode 537 Electrode 538 Intersection 541 Wiring 542 Wiring 550 FPC 561 Conductive film 562 Conductive film 563 Conductive film 564 Nanowire 590 Substrate 591 Electrode 592 Electrode 593 Insulating layer 594 Wiring 595 Touch sensor 597 Adhesive layer 598 Wiring 599 Connection layer 600 Input unit 602 Detection unit 603d Drive circuit 603g Drive circuit 650 Capacitor element 651 Electrode 652 Electrode 653 Insulating layer 667 Window portion 670 Protective layer 701 Substrate 703 Adhesive layer 705 Insulating layer 711 Substrate 713 Adhesive layer 715 Insulating layer 723 Adhesive layer 804 Display section 806 Operation circuit section 808 FPC 810 Transparent section 815 Insulating layer 816 Insulating layer 817 Insulating layer 817a Insulating layer 817b Insulating layer 820 Transistor 821 Insulating layer 822 Adhesive layer 823 Spacer 824 Transistor 825 Connector 830 Light-emitting element 831 Lower electrode 832 Optical adjustment layer 832B Optical adjustment layer 832R Optical adjustment layer 833 EL layer 835 Upper electrode 845 Coloring layer 847 Light-shielding layer 849 Overcoat 856 Conductive layer 857 Conductive layer 860 Auxiliary electrode 860a Conductive layer 860b Conductive layer 870 Transistor 871 Capacitor element

Claims

[Claim 1] A display device comprising two display panels, two plates, two stages, two driving circuits, and two adjustment means, and a frame, the adjustment means has a function of adjusting a position and an angle of the stage, and is fixed to the frame; the drive circuit has a function of outputting a signal for driving the display panel; the stage is fixed to the adjustment means and has an area for disposing the drive circuit and the plate; the plate has a mechanism for connecting to the stage on a first surface, and a convex curved surface on one side of the plate; the display panel includes a display section, an operating circuit section, terminals, external electrodes, a transparent section, and a first section, and is flexible; The display unit has a function of displaying an image, the operation circuit unit includes a circuit having a function of outputting a signal to the display unit and wiring electrically connecting the circuit and the terminal, and is located in an area adjacent to the display unit; The terminal is electrically connected to the external electrode, the external electrode has a function of transmitting a signal output from the drive circuit to the operation circuit unit, the transparent portion includes a region that transmits visible light, does not overlap the operational circuit portion, and is located in a region adjacent to one side of the display portion; the first portion includes a region between the terminal and the display unit in the display panel, the display panel is fixed such that a surface of the display unit that faces a surface on which the image is displayed and a second surface of the plate that faces the first surface are fixed such that the transparent portion and a part of the display unit protrude from the plate, and the first portion is disposed so as to follow the curved surface of the convex portion; The display portion of one of the two display panels overlaps with the transparent portion of the other of the two display panels. Display device.

Images