JP-2026076228-A - display device
Abstract
[Problem] To provide a display device that combines high display quality and high resolution. [Solution] The display device comprises a light-emitting element and a connecting portion. The connecting portion is provided along the outer periphery of a display area on which the light-emitting element is provided. The light-emitting element comprises a pixel electrode, a first EL layer on the pixel electrode, a second EL layer on the first EL layer, and a common electrode on the second EL layer. The connecting portion comprises a connecting electrode, a second EL layer on the connecting electrode, and a common electrode on the second EL layer. The second EL layer comprises a first region in contact with the connecting electrode and a second region in contact with the common electrode. In a top view, the area of the region where the first region and the second region overlap is 40,000 square micrometers or more. The second EL layer has a region with a film thickness of 0.5 nm or more and 1.5 nm or less. The second EL layer contains a material with high electron injection capacity. [Selection Diagram] Figure 1
Inventors
- 中村 太紀
- 加藤 翔
- 岡崎 健一
- 山崎 舜平
Assignees
- 株式会社半導体エネルギー研究所
Dates
- Publication Date
- 20260511
- Application Date
- 20260120
- Priority Date
- 20210127
Claims (3)
- It has a light-emitting element and a connecting part, The connection portion is provided along the outer periphery of the display area on which the light-emitting element is provided. The light-emitting element comprises a pixel electrode, an insulating layer on the pixel electrode, a first EL layer on the pixel electrode and on the insulating layer, a second EL layer on the first EL layer, a common electrode on the second EL layer, and a protective layer on the common electrode. The upper surface of the insulating layer has a region having a recess, The protective layer is formed along the recess, The insulating layer has a region that is in contact with the bottom surface of the recess, The connecting portion comprises a connecting electrode, an insulating layer on the connecting electrode, a second EL layer on the connecting electrode and the insulating layer, and a common electrode on the second EL layer. The second EL layer has a third region in contact with the connecting electrode and a second region in contact with the common electrode, through a first opening in the insulating layer. In a top view, the area of the region where the third region and the second region overlap is 40,000 μm² or more. The second EL layer contains lithium fluoride, Display device.
- In claim 1, The second EL layer has a region with a film thickness of 0.5 nm or more and 1.5 nm or less. Display device.
- In claim 1 or claim 2, The connecting portion has a comb-like or slit-like upper surface shape. Display device.
Description
One aspect of the present invention relates to a display device. Another aspect of the present invention relates to a method for manufacturing a display device. Furthermore, one aspect of the present invention is not limited to the above-mentioned technical field. Examples of technical fields related to one aspect of the present invention disclosed herein include semiconductor devices, display devices, light-emitting devices, energy storage devices, memory devices, electronic devices, lighting devices, input devices, input/output devices, methods for driving them, or methods for manufacturing them. A semiconductor device refers to any device that can function by utilizing semiconductor properties. In recent years, there has been a growing demand for higher resolution display panels. Examples of devices requiring high-resolution display panels include smartphones, tablet devices, and notebook computers. Furthermore, stationary display devices such as television sets and monitors are also demanding higher resolutions. Among devices requiring the highest level of resolution are those used for virtual reality (VR) and augmented reality (AR). Furthermore, typical examples of display devices applicable to display panels include liquid crystal displays, organic electroluminescent (EL) elements, light-emitting devices equipped with light-emitting elements such as LEDs, and electronic paper that displays information using electrophoretic methods. For example, the basic structure of an organic EL element consists of a layer containing a light-emitting organic compound sandwiched between a pair of electrodes. By applying a voltage to this element, light can be obtained from the light-emitting organic compound. Because a display device using such an organic EL element does not require a backlight, which is necessary for liquid crystal displays, it is possible to realize a thin, lightweight, high-contrast, and low-power display device. For example, an example of a display device using an organic EL element is described in Patent Document 1. Japanese Patent Publication No. 2002-324673 Figures 1A to 1C show examples of the configuration of a display device.Figures 2A to 2J show examples of the configuration of a display device.Figures 3A to 3C show examples of methods for manufacturing a display device.Figures 4A to 4C show examples of methods for manufacturing a display device.Figures 5A to 5C show examples of methods for manufacturing a display device.Figures 6A to 6D show examples of methods for manufacturing a display device.Figures 7A to 7C show examples of the configuration of a display device.Figure 8 shows an example of the configuration of a display device.Figures 9A to 9C show examples of methods for manufacturing a display device.Figures 10A and 10B show examples of methods for manufacturing a display device.Figures 11A to 11D show examples of the configuration of a display device.Figure 12 shows an example of a display device configuration.Figures 13A to 13C show examples of the configuration of a display device.Figures 14A to 14C show examples of the configuration of a display device.Figures 15A to 15D show examples of the configuration of a display device.Figures 16A to 16C show examples of the configuration of a display device.Figures 17A to 17C show examples of the configuration of a display device.Figure 18 is a perspective view showing an example of a display device.Figures 19A and 19B are cross-sectional views showing an example of a display device.Figure 20A is a cross-sectional view showing an example of a display device. Figure 20B is a cross-sectional view showing an example of a transistor.Figures 21A and 21B are perspective views showing an example of a display module.Figure 22 is a cross-sectional view showing an example of a display device.Figure 23 is a cross-sectional view showing an example of a display device.Figure 24 is a cross-sectional view showing an example of a display device.Figures 25A to 25D show examples of the configuration of a light-emitting element.Figures 26A and 26B show examples of electronic devices.Figures 27A to 27D show examples of electronic devices.Figures 28A to 28F show examples of electronic devices.Figures 29A to 29F show examples of electronic devices.Figure 30 is a diagram illustrating the configuration of the sample according to the example.Figure 31 shows the measurement results for the example. The embodiments will be described below with reference to the drawings. However, it will be readily apparent to those skilled in the art that the embodiments can be implemented in many different ways, and their form and details can be modified in various ways without departing from the spirit and scope. Therefore, the present invention is not to be construed as being limited to the following embodiments. In the invention described below, the same reference numerals are used across different drawings for identical parts or parts with similar functions, and repeated expl