JP-2026076211-A - Light-emitting device

JP2026076211AJP 2026076211 AJP2026076211 AJP 2026076211AJP-2026076211-A

Abstract

[Problem] To provide a display device with a narrow bezel. [Solution] A display device comprising a first layer, a second layer, and a third layer stacked together. The first layer has a gate driver circuit and a data driver circuit, the second layer has a demultiplexer circuit, and the third layer has a display unit. Pixels are arranged in a matrix on the display unit, the input terminal of the demultiplexer circuit is electrically connected to the data driver circuit, and the output terminal of the demultiplexer circuit is electrically connected to the pixels. The gate driver circuit and the data driver circuit are provided so as to have an overlapping region with the pixels. Furthermore, the gate driver circuit and the data driver circuit are not clearly separated and have an overlapping region. Five or more gate driver circuits and data driver circuits can be provided. [Selection Diagram] Figure 2

Inventors

中川貴史
池田隆之
小林英智
宍戸英明
勝井秀一
木村清貴

Assignees

株式会社半導体エネルギー研究所

Dates

Publication Date: 20260511
Application Date: 20260114
Priority Date: 20190510

Claims (2)

The pixel portion has a first transistor, a second transistor, a capacitive element, and a light-emitting element. The source electrode or drain electrode of the first transistor is always in electrical contact with the gate electrode of the second transistor. A potential corresponding to the image data is applied to the gate electrode of the second transistor via the first transistor. The second transistor has the function of controlling the current flowing between the power line and the light-emitting element according to the potential, One electrode of the capacitive element is always in electrical contact with either the source electrode or the drain electrode of the first transistor. The other electrode of the capacitive element is in constant electrical contact with the pixel electrode of the light-emitting element in this light-emitting device, A first oxide semiconductor film having the channel region of the first transistor, A second oxide semiconductor film having the channel region of the second transistor, A first insulating film having a region positioned above the first oxide semiconductor film and a region positioned above the second oxide semiconductor film, A first conductive film having a region positioned above the first insulating film and functioning as one electrode of the capacitive element, A second conductive film having a region positioned above the first conductive film and functioning as the other electrode of the capacitive element, A second insulating film having a region positioned above the second conductive film, A third conductive film having a region positioned above the second insulating film and always being electrically connected to the second conductive film, A third insulating film having a region positioned above the third conductive film, A fourth conductive film having a region positioned above the third insulating film and functioning as a power line, A fifth conductive film having a region positioned above the third insulating film and always being electrically connected to the third conductive film, A sixth conductive film having a region positioned above the fifth conductive film and functioning as a pixel electrode, The region of the second conductive film that overlaps with the first conductive film has a region that overlaps with the fourth conductive film. Light-emitting device.
The pixel portion has a first transistor, a second transistor, a capacitive element, and a light-emitting element. The source electrode or drain electrode of the first transistor is always in electrical contact with the gate electrode of the second transistor. A potential corresponding to the image data is applied to the gate electrode of the second transistor via the first transistor. The second transistor has the function of controlling the current flowing between the power line and the light-emitting element according to the potential, One electrode of the capacitive element is always in electrical contact with either the source electrode or the drain electrode of the first transistor. The other electrode of the capacitive element is in constant electrical contact with the pixel electrode of the light-emitting element in this light-emitting device, A first oxide semiconductor film having the channel region of the first transistor, A second oxide semiconductor film having the channel region of the second transistor, A first insulating film having a region positioned above the first oxide semiconductor film and a region positioned above the second oxide semiconductor film, A first conductive film having a region positioned above the first insulating film and functioning as one electrode of the capacitive element, A second conductive film having a region positioned above the first conductive film and functioning as the other electrode of the capacitive element, A second insulating film having a region positioned above the second conductive film, A third conductive film having a region positioned above the second insulating film and always being electrically connected to the second conductive film, A third insulating film having a region positioned above the third conductive film, A fourth conductive film having a region positioned above the third insulating film and functioning as a power line, A fifth conductive film having a region positioned above the third insulating film and always being electrically connected to the third conductive film, A sixth conductive film having a region positioned above the fifth conductive film and functioning as a pixel electrode, The fourth conductive film does not overlap with the channel-forming region of the first oxide semiconductor film. The region of the second conductive film that overlaps with the first conductive film has a region that overlaps with the fourth conductive film. Light-emitting device.

Description

One aspect of the present invention relates to a display device. Furthermore, one aspect of the present invention is not limited to the above-mentioned technical fields. Technical fields of one aspect of the present invention disclosed herein include semiconductor devices, display devices, light-emitting devices, energy storage devices, memory devices, Examples include electronic devices, lighting devices, input devices, input/output devices, methods for driving them, or methods for manufacturing them. Semiconductor devices refer to all devices that can function by utilizing semiconductor properties. Oxide semiconductors using metal oxides are attracting attention as semiconductor materials applicable to transistors. For example, Patent Document 1 discloses a semiconductor device in which multiple oxide semiconductor layers are stacked, and in which the channel oxide semiconductor layer among the multiple oxide semiconductor layers contains indium and gallium, and the proportion of indium is greater than the proportion of gallium, thereby increasing the field-effect mobility (sometimes simply called mobility or μFE). Metal oxides that can be used in semiconductor layers can be formed using sputtering methods, and therefore can be used in the semiconductor layers of transistors that make up large display devices. Furthermore, it is possible to modify and utilize some of the production equipment for transistors using polycrystalline silicon or amorphous silicon, thus reducing capital investment. In addition, transistors using metal oxides have a higher field-effect mobility compared to those using amorphous silicon, enabling the realization of high-performance display devices equipped with drive circuits. Furthermore, Augmented Reality (AR) or Virtual Reality (VR) Wearable and stationary display devices are becoming increasingly popular as display devices for (irtual reality). Examples of wearable display devices include: Examples include head-mounted displays (HMDs) and glasses-type display devices. Examples of stationary display devices include head-up displays (HUDs). Furthermore, electronic viewfinders are used as viewfinders in electronic devices having an imaging device, such as digital cameras, for checking the image to be captured before it is captured. Electronic viewfinders are equipped with a display unit, which can display the image obtained by the imaging device as an image on the display unit. For example, in Patent Document 2, An electronic viewfinder is disclosed that can obtain good diopter from the center to the periphery of the image. Japanese Patent Publication No. 2014-7399Japanese Patent Publication No. 2012-42569 Figure 1A is a block diagram showing an example of the configuration of a display device. Figure 1B is a schematic diagram showing an example of the configuration of a display device.Figure 2 is a block diagram showing an example of a display device configuration.Figure 3 is a block diagram showing an example of a display device configuration.Figures 4A to 4C are circuit diagrams showing examples of pixel configurations.Figure 5 is a timing chart showing an example of how the display device operates.Figure 6 is a block diagram showing an example of a display device configuration.Figure 7 is a block diagram showing an example of the configuration of a display device.Figure 8 is a block diagram showing an example of a display device configuration.Figure 9 is a block diagram showing an example of a display device configuration.Figure 10 is a block diagram showing an example of a display device configuration.Figure 11 is a block diagram showing an example of a display device configuration.Figure 12 is a block diagram showing an example of a display device configuration.Figure 13 is a circuit diagram showing an example of a D/A conversion circuit configuration.Figure 14 is a block diagram showing an example of a gate driver circuit configuration.Figure 15A is a block diagram showing an example of a register circuit configuration. Figure 15B is a circuit diagram showing an example of a register circuit configuration.Figure 16 is a schematic diagram showing the arrangement of the gate driver circuit and the data driver circuit.Figure 17 is a top view showing an example configuration of a gate driver circuit and a data driver circuit.Figure 18 is a cross-sectional view showing an example of the configuration of a display device.Figure 19 is a cross-sectional view showing an example of the configuration of a display device.Figure 20 is a cross-sectional view showing an example of the configuration of a display device.Figure 21 is a cross-sectional view showing an example of the configuration of a display device.Figure 22 is a cross-sectional view showing an example of the configuration of a display device.Figure 23 is a cross-sectional view showing an example of the configuration of a display device.Figures 24A and 24B are top views showing examples of pixel configurations.Figure 25 is