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JP-7856735-B2 - Electronic devices, display devices, photoelectric converters, electronic equipment, lighting, and mobile devices

JP7856735B2JP 7856735 B2JP7856735 B2JP 7856735B2JP-7856735-B2

Inventors

  • 高橋 哲生
  • 伊藤 希之
  • 佐野 博晃
  • 松田 陽次郎

Assignees

  • キヤノン株式会社

Dates

Publication Date
20260511
Application Date
20241211

Claims (14)

  1. Having multiple elements arranged on a substrate, Each of the aforementioned plurality of elements has, from the substrate side, an insulating layer, a first electrode, a functional layer, and a second electrode, in this order. An electronic device in which the functional layer and the second electrode are arranged continuously from above one first electrode to above the other first electrode, such that they cover two first electrodes independently possessed by two adjacent elements among the plurality of elements, The insulating layer has an inclined portion that is inclined with respect to the substrate, The first electrode has a first portion disposed on the inclined portion and a second portion that is in contact with the functional layer and has a smaller inclination angle with respect to the substrate than the first portion. The thickness of the functional layer placed on the first portion in the direction normal to the surface in contact with the first portion is smaller than the thickness of the functional layer placed on the second portion in the direction normal to the surface in contact with the second portion. The plurality of elements include a first element that emits a first light and a second element that emits a second light. The first element and the second element further have a reflective layer and a part of the insulating layer between the second portion and the substrate, from the substrate side. The thickness of the portion of the insulating layer of the first element and the thickness of the portion of the insulating layer of the second element are different from each other. The insulating layer has a flat portion located further away from the substrate than the second portion. The reflective layer is located below the second portion and the flat portion. The thickness of the portion of the reflective layer located below the flat portion in the direction perpendicular to the substrate is greater than the thickness of the portion of the reflective layer located below the second portion in the direction perpendicular to the substrate. The electronic device is characterized in that the insulating layer is arranged to cover the step formed by the portion located below the second portion of the reflective layer and the portion located below the flat portion of the reflective layer.
  2. The electronic device according to claim 1 , characterized in that the first part is arranged to surround the second part.
  3. The electronic device according to claim 1 or 2 , further comprising a second insulating layer disposed between the first electrode and the functional layer.
  4. The electronic device according to any one of claims 1 to 3 , characterized in that the first electrode is arranged on the insulating layer so as to cover the end of the flat portion and the inclined portion.
  5. The inclined portion of the insulating layer is arranged to surround the second portion in a plan view with respect to the substrate. The electronic device according to any one of claims 1 to 4 , characterized in that the flat portion of the insulating layer is arranged to surround the inclined portion in a plan view with respect to the substrate.
  6. The electronic device according to any one of claims 1 to 5 , characterized in that the upper surface of the flat portion of the insulating layer of the first element and the upper surface of the flat portion of the insulating layer of the second element are on the same plane.
  7. The electronic device according to any one of claims 1 to 5, characterized in that the upper surface of the second portion of the first electrode of the first element and the upper surface of the second portion of the first electrode of the second element are on different planes.
  8. The electronic device according to claim 1, wherein the portion of the insulating layer functions as an optical adjustment layer.
  9. An electronic device according to any one of claims 1 to 8 , A display device characterized by having a transistor connected to the plurality of elements.
  10. Imaging device and The display unit comprises an electronic device as described in any one of claims 1 to 8 , A display device in which the display image of the display unit is controlled based on the user's gaze information provided by the imaging device.
  11. It comprises an optical unit having multiple lenses, an image sensor that receives light that has passed through the optical unit, and a display unit that displays the image captured by the image sensor. The display unit is a photoelectric conversion device having the electronic device described in any one of claims 1 to 8 .
  12. An electronic device comprising: a display unit having an electronic device according to any one of claims 1 to 8 ; a housing on which the display unit is provided; and a communication unit provided in the housing for communicating with the outside.
  13. A lighting device comprising a light source having an electronic device according to any one of claims 1 to 8 , and a light diffusing portion or optical film that transmits light emitted by the light source.
  14. A mobile body comprising a light fixture having an electronic device according to any one of claims 1 to 8 , and a body on which the light fixture is provided.

Description

This invention relates to electronic devices, display devices, photoelectric converters, electronic equipment, lighting, and mobile devices. As electronic devices using organic layers (also called organic compound layers), organic light-emitting devices and organic photoelectric devices have been proposed. An organic light-emitting device is a device having a cathode, an anode, and an organic layer placed between them. It is a light-emitting device that generates light when electrons injected from the cathode and holes injected from the anode recombine. An organic photoelectric device is a device having a cathode, an anode, and an organic layer placed between them. It is a photoelectric device that extracts electrons and holes generated when the organic layer absorbs light from the cathode and anode. In recent years, display devices equipped with organic light-emitting devices and imaging devices equipped with organic photoelectric devices have attracted attention. In electronic devices using organic layers, the organic layer may be continuously formed across multiple organic light-emitting elements or multiple organic photoelectric conversion elements. In such cases, current leakage is likely to occur through the organic layer between the electrodes (cathode or anode) of adjacent elements. If current leakage occurs between adjacent elements in organic light-emitting elements, it can lead to unintended light emission, narrowing the color gamut of the display device. Similarly, if current leakage occurs between adjacent elements in organic photoelectric conversion elements, noise will be generated. Thus, current leakage between adjacent elements degrades the performance of electronic devices. The electronic device described in Patent Document 1 has an insulating layer provided so as to cover the ends of the lower electrodes of adjacent elements. The insulating layer has a sloping portion positioned above the lower electrodes, and an organic layer is continuously formed on top of this sloping portion across multiple elements. Patent Document 1 describes setting the thickness of the organic layer positioned above the sloping portion of the insulating layer to a predetermined value or greater in order to suppress current leakage between the lower electrodes of adjacent elements while also suppressing current leakage between the upper and lower electrodes. Japanese Patent Publication No. 2020-136260 A plan view showing the configuration of an organic light-emitting device according to the first embodiment.A cross-sectional view showing the configuration of an organic light-emitting device according to the first embodiment.A magnified view of a portion of Figure 2.A schematic diagram showing the configuration of the organic light-emitting apparatus in the comparative example.A diagram illustrating the relationship between the ratio of the distance between two adjacent flat portions of lower electrodes and the chromaticity of the red pixel, relative to the thickness of the organic layer on the flat portion of the lower electrode.Component layout diagram in thin-film deposition simulation.A figure showing the results of the film deposition simulation.A cross-sectional view showing the configuration of an organic light-emitting device according to the second embodiment.A cross-sectional view showing the configuration of an organic light-emitting device according to the third embodiment.A magnified view of a section of Figure 9.A cross-sectional view showing the configuration of an organic light-emitting device according to the fourth embodiment.A cross-sectional view showing the configuration of an organic light-emitting device according to the fifth embodiment.A schematic diagram illustrating an example of a display device.A schematic diagram illustrating an example of an imaging device.A schematic diagram illustrating an example of a display device.A schematic diagram illustrating an example of a lighting device.A schematic diagram illustrating an example of a display device application. The following describes the details of an organic light-emitting device according to an embodiment of the present invention, with reference to the drawings. Note that the following embodiments are merely examples of the present invention, and the numerical values, shapes, materials, components, arrangement of components, and connection configurations are not limiting to the present invention. While multiple features are described in the embodiments, not all of these features are essential to the invention, and the features may be combined arbitrarily. Furthermore, in the accompanying drawings, the same or similar configurations are given the same reference numerals, and redundant descriptions are omitted. In this specification, terms such as "above" and "below" are used for convenience to explain the positional relationships between components with reference to the drawings. Furthermore, the positional relationships between compon