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CN-122028624-A - Light emitting device, display device, photoelectric conversion device, electronic apparatus, lighting device, mobile body, and wearable device

CN122028624ACN 122028624 ACN122028624 ACN 122028624ACN-122028624-A

Abstract

The present invention relates to a light emitting device, a display device, a photoelectric conversion device, an electronic apparatus, a lighting device, a mobile body, and a wearable device. A light emitting device including a first pixel and a second pixel is provided. The first pixel and the second pixel lattice include microlenses, and a light-emitting element including a light-emitting layer is arranged between the main surface of the substrate and the microlenses. The luminance distribution in the light emitting region of the light emitting layer of the first pixel and the luminance distribution in the light emitting region of the light emitting layer of the second pixel are different from each other. The microlens is arranged at a position where, in the case where light is incident toward the light emitting layer while passing through the microlens from the normal direction of the main surface, the area of the region where the light beam having passed through the entire microlens is incident becomes larger than the area of the light emitting region.

Inventors

  • SHINICHI ARAYA
  • SANO HIROAKI
  • Ridang Xiangma
  • SATO AKIRA
  • ITO NORIYUKI
  • MATSUDA YOJIRO

Assignees

  • 佳能株式会社

Dates

Publication Date
20260512
Application Date
20251107
Priority Date
20241112

Claims (20)

  1. 1. A light emitting device includes a first pixel and a second pixel, wherein, The first pixel and the second pixel each include a microlens disposed over a main surface of a substrate and a light emitting element disposed between the main surface and the microlens, The light-emitting element comprises a light-emitting layer, The luminance distribution in the light-emitting region of the light-emitting layer of the first pixel and the luminance distribution in the light-emitting region of the light-emitting layer of the second pixel are different from each other, and In each of the first pixel and the second pixel, the microlens is arranged at a position where, in a case where light is incident toward the light emitting layer while passing through the microlens from a normal direction of the main surface, an area of an incident region to which a light beam having passed through the entire microlens in a plane parallel to the main surface and including an upper surface of the light emitting layer is incident becomes larger than an area of the light emitting region.
  2. 2. The light-emitting device according to claim 1, wherein, in each of the first pixel and the second pixel, an entire outer edge of the light-emitting region is arranged inside an outer edge of the incident region in a plan view.
  3. 3. The light-emitting device of claim 1, wherein, The light emitting device includes a plurality of pixels including the first pixel and the second pixel, and The first pixel and the second pixel are closest pixels of the plurality of pixels that emit light of the same color.
  4. 4. The light-emitting device according to claim 1, wherein, in each of the first pixel and the second pixel, in a coordinate system in which a direction from the first pixel to the second pixel is a first direction, a direction intersecting the first direction is a second direction, and a geometric centroid position of the light-emitting region in orthogonal projection with respect to the main surface is an origin, a coordinate position of a first position at which luminance is maximum in the light-emitting region of the first pixel and a coordinate position of a second position at which luminance is maximum in the light-emitting region of the second pixel are different from each other.
  5. 5. The light-emitting device according to claim 4, wherein the first position and the second position are not less than 0.2 μm apart from each other in the coordinate system.
  6. 6. The light-emitting device according to claim 4, wherein the first position and the second position are not less than 0.5 μm apart from each other in the coordinate system.
  7. 7. The light-emitting device according to claim 1, wherein a luminance at a geometric centroid position in a light-emitting region of the first pixel in orthogonal projection for the main face and a luminance at a geometric centroid position in a light-emitting region of the second pixel in orthogonal projection for the main face are different from each other.
  8. 8. The light-emitting device according to claim 1, wherein a luminance at a geometric centroid position in a light-emitting region of the first pixel in orthogonal projection for the main face differs from a luminance at a geometric centroid position in a light-emitting region of the second pixel in orthogonal projection for the main face by not less than 2%.
  9. 9. The light-emitting device according to claim 1, wherein a luminance at a geometric centroid position in a light-emitting region of the first pixel in orthogonal projection for the main face differs from a luminance at a geometric centroid position in a light-emitting region of the second pixel in orthogonal projection for the main face by not less than 5%.
  10. 10. The light-emitting device according to claim 1, wherein a luminance at a geometric centroid position in a light-emitting region of the first pixel in orthogonal projection for the main face differs from a luminance at a geometric centroid position in a light-emitting region of the second pixel in orthogonal projection for the main face by not less than 10%.
  11. 11. The light-emitting device according to claim 1, wherein the light-emitting region of the first pixel has a plurality of luminance peak positions in orthogonal projection with respect to the main surface.
  12. 12. The light-emitting device of claim 1, wherein, The light-emitting element includes a lower electrode disposed between the light-emitting layer and the main surface, and The lower electrode includes a conductive layer and an oxide layer covering the conductive layer.
  13. 13. The light-emitting device of claim 1, wherein, The light-emitting element includes a lower electrode disposed between the light-emitting layer and the main surface, and The lower electrode has an in-plane distribution of reflectance for light emitted from the light emitting region.
  14. 14. The light-emitting device according to claim 1, wherein the light-emitting element includes a lower electrode arranged between the light-emitting layer and the main surface, a reflective layer arranged between the lower electrode and the main surface, and an insulating layer arranged between the lower electrode and the reflective layer.
  15. 15. A display device, comprising: The light-emitting device according to any one of claims 1 to 14, and A control circuit connected to the light emitting device.
  16. 16. A photoelectric conversion apparatus comprising: an optical unit including a plurality of lenses; An image sensor configured to receive light having passed through the optical unit, and A display configured to display an image, Wherein the display comprises a light emitting device according to any one of claims 1 to 14.
  17. 17. An electronic device, comprising: a housing provided with a display, and A communication unit provided in the housing and configured to perform external communication, Wherein the display comprises a light emitting device according to any one of claims 1 to 14.
  18. 18. A lighting device, comprising: A light source, and At least one of the light diffusion unit and the optical film, Wherein the light source comprises a light emitting device according to any one of claims 1 to 14.
  19. 19. A mobile body, comprising: A main body, and A display disposed in the body and having a display screen, Wherein the display comprises a light emitting device according to any one of claims 1 to 14.
  20. 20. A wearable device, comprising: a display device configured to display an image, Wherein the display device comprises a light emitting device according to any one of claims 1 to 14.

Description

Light emitting device, display device, photoelectric conversion device, electronic apparatus, lighting device, mobile body, and wearable device Technical Field Aspects of the embodiments relate to a light emitting device, a display device, a photoelectric conversion device, an electronic apparatus, a lighting device, a mobile body, and a wearable device. Background A light emitting device including a light emitting element such as an organic Electroluminescence (EL) element is known. Japanese patent application laid-open No. 2022-080507 describes an electro-optical device including microlenses on a light emitting element to improve light extraction efficiency. If the luminance distribution in the light emitting region of the light emitting elements varies between the light emitting elements, the intensity of light extracted by the microlenses may vary between the light emitting elements due to the variation of the luminance distribution. Disclosure of Invention There is provided a light emitting device including a first pixel and a second pixel, wherein the first pixel and the second pixel each include a microlens arranged above a main surface of a substrate and a light emitting element arranged between the main surface and the microlens, the light emitting element includes a light emitting layer, a luminance distribution in a light emitting region of the light emitting layer of the first pixel and a luminance distribution in a light emitting region of the light emitting layer of the second pixel are different from each other, and in each of the first pixel and the second pixel, the microlens is arranged at a position where an area of an incident region to which a light beam having passed through the entire microlens in a plane parallel to the main surface and including an upper surface of the light emitting layer is incident becomes larger than an area of the light emitting region in a case where the light is incident toward the light emitting layer while passing through the microlens from a normal direction of the main surface. Features of the present disclosure will become apparent from the following description of embodiments with reference to the accompanying drawings. The following description of the embodiments is described by way of example. Drawings Fig. 1 is a sectional view showing an example of a configuration of a light emitting device according to an embodiment; Fig. 2 is a view for explaining light emitted from a pixel of the light emitting device shown in fig. 1; Fig. 3 is a view for explaining light incident to a pixel of the light emitting device shown in fig. 1; Fig. 4 is a diagram showing an example of an optical path of light passing through a microlens of the light emitting device shown in fig. 1; fig. 5 is a diagram showing an example of an optical path of light passing through a microlens of the light emitting device shown in fig. 1; fig. 6A and 6B are diagrams for explaining a light-emitting device of a comparative example; fig. 7A and 7B are diagrams for explaining the effect of the light emitting device shown in fig. 1; fig. 8 is a diagram for explaining evaluation of the distribution of the light emission intensity of the light emitting device shown in fig. 1; Fig. 9 is a diagram showing an example of an optical path of light passing through a microlens of the light emitting device shown in fig. 1; Fig. 10A and 10B are an orthogonal projection view and a cross-sectional view showing a modification of the light-emitting device shown in fig. 1; fig. 11 is a cross-sectional view showing a modification of the light-emitting device shown in fig. 1; Fig. 12A and 12B are cross-sectional views showing an example of the configuration of a pixel of a light emitting device according to an embodiment; fig. 13A to 13C are diagrams showing an example of an image forming apparatus using a light emitting device according to an embodiment; fig. 14 is a diagram showing an example of a display device using a light emitting device according to an embodiment; Fig. 15 is a diagram showing an example of a photoelectric conversion device using the light-emitting device according to the embodiment; fig. 16 is a diagram showing an example of an electronic apparatus using a light emitting device according to an embodiment; Fig. 17A and 17B are diagrams each showing an example of a display device using the light-emitting device according to the embodiment; Fig. 18 is a diagram showing an example of a lighting device using the light emitting device according to the embodiment; Fig. 19A and 19B are diagrams showing an example of a moving body using a light emitting device according to an embodiment, and Fig. 20A and 20B are diagrams each showing an example of a wearable device using the light emitting device according to the embodiment. Detailed Description Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following examples are not intended to lim