KR-102962086-B1 - Display devices and electronic devices

KR102962086B1KR 102962086 B1KR102962086 B1KR 102962086B1KR-102962086-B1

Abstract

A display device having an excellent boost function is provided. The display device is provided with a pixel having a function of adding data (boost function). A boost capacitor is provided in the pixel, and data is added through capacitive coupling and supplied to the display device. By arranging the boost capacitor and the data holding capacitor in an overlapping manner, the capacitance value of the boost capacitor can be increased. Therefore, an excellent boost function can be provided to the pixel without significantly reducing the aperture ratio or precision.

Inventors

카와시마 스스무
쿠스모토 나오토

Assignees

가부시키가이샤 한도오따이 에네루기 켄큐쇼

Dates

Publication Date: 20260511
Application Date: 20200518
Priority Date: 20190530

Claims (9)

As a display device, A pixel having a first capacitor, a second capacitor, and a display element, The first capacitor and the second capacitor are electrically connected to the display element, and The first capacitor above has a configuration in which a first conductive layer, a first dielectric layer, and a second conductive layer are stacked in this order, and The second capacitor has a configuration in which the second conductive layer, the second dielectric layer, and the third conductive layer are stacked in this order, The first capacitor and the second capacitor have overlapping regions, The pixel further has a first transistor, a second transistor, and a third transistor, One of the source and drain of the first transistor is electrically connected to the second conductive layer, and A display device in which one of the source and drain of the second transistor and one of the source and drain of the third transistor are electrically connected to the third conductive layer.
In Article 1, A display device in which the second capacitor has a larger capacitance value than the first capacitor.
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In Article 1, The above pixel has a light-emitting element as the above display element, The above pixel further has a fourth transistor and a fifth transistor, The gate of the fourth transistor is electrically connected to the second conductive layer, and A display device in which one of the source and drain of the fourth transistor, one of the source and drain of the fifth transistor, and one electrode of the light-emitting element are electrically connected to the first conductive layer.
In Article 1, The above pixel has a liquid crystal element as the above display element, A display device in which one electrode of the liquid crystal element is electrically connected to the second conductive layer.
In Article 1, A display device in which the first to third transistors have a metal oxide in a channel forming region.
In Article 1, A display device having a metal oxide in the second conductive layer.
In Article 6 or Article 7, The above metal oxide is a display device having In, Zn, and M (M is Al, Ti, Ga, Ge, Sn, Y, Zr, La, Ce, Nd, or Hf).
As an electronic device, The display device described in claim 1, and With a camera, An electronic device that displays an image captured by the above camera on the above display device.

Description

Display devices and electronic devices One embodiment of the present invention relates to a display device. Furthermore, one embodiment of the present invention is not limited to the above technical fields. The technical field of one embodiment of the invention disclosed in this specification, etc. relates to an object, a method, or a method of manufacturing. Or, one embodiment of the present invention relates to a process, a machine, a product, or a composition of matter. Accordingly, more specifically, examples of the technical field of one embodiment of the present invention disclosed in this specification include a semiconductor device, a display device, a liquid crystal display device, a light-emitting device, a lighting device, a storage device, a memory device, an imaging device, a method of operating the same, or a method of manufacturing the same. In addition, the term "semiconductor device" in this specification and others refers to any device capable of functioning by utilizing semiconductor characteristics. Transistors and semiconductor circuits are forms of semiconductor devices. Additionally, memory devices, display devices, imaging devices, and electronic devices may have semiconductor devices. A technology for constructing transistors using metal oxides formed on a substrate is attracting attention. For example, a technology for using a transistor made of zinc oxide or an In-Ga-Zn-based oxide as a switching element for a pixel of a display device is disclosed in Patent Document 1 and Patent Document 2. In addition, a memory device configured to use a transistor with very low off-current in a memory cell is disclosed in Patent Document 3. Figure 1 is a diagram illustrating a pixel circuit. Figures 2 (A) and (B) are diagrams illustrating the configuration of a capacitor. Figures 3 (A) and (B) are diagrams illustrating the configuration of a capacitor. Figures 4 (A) to (C) are diagrams illustrating a pixel circuit. Figure 5 is a diagram illustrating a pixel circuit. Figure 6 is a timing chart explaining the operation of the pixel circuit. Figure 7 (A) is a diagram illustrating a pixel circuit. Figure 7 (B) is a diagram illustrating the configuration of a capacitor. Figures 8 (A) and (B) are diagrams illustrating a pixel circuit. Figure 9 is a diagram illustrating a pixel circuit. Figure 10 is a diagram illustrating a pixel circuit. Figure 11 is a diagram illustrating a pixel circuit. Figures 12 (A) and (B) are drawings illustrating the pixel layout. Figures 13 (A) and (B) are drawings illustrating the pixel layout. Figures 14 (A) and (B) are drawings illustrating the pixel layout. Figures 15 (A) to (C) are drawings illustrating the pixel layout. Figures 16 (A) and (B) are drawings illustrating the pixel layout. Figures 17 (A) and (B) are drawings illustrating the pixel layout. Figures 18 (A) and (B) are drawings illustrating the pixel layout. Figure 19 is a drawing illustrating a display device. Figures 20 (A) to (C) are drawings illustrating a display device. Figures 21 (A) and (B) are drawings illustrating a touch panel. Figures 22 (A) and (B) are drawings illustrating a display device. Figure 23 is a drawing illustrating a display device. Figures 24 (A) and (B) are drawings illustrating a display device. Figures 25 (A) and (B) are drawings illustrating a display device. Figures 26 (A) to (E) are drawings illustrating a display device. Figures 27 (A) to (C) are diagrams illustrating a transistor. Figures 28 (A) to (C) are diagrams illustrating a transistor. Figures 29 (A) and (B) are diagrams illustrating a transistor. Figures 30 (A) to (F) are drawings illustrating electronic devices. Embodiments are described in detail using drawings. However, the present invention is not limited to the description below, and it is readily understood by those skilled in the art that various changes to its form and details can be made without departing from the spirit and scope of the invention. Therefore, the present invention is not to be interpreted as being limited to the description of the embodiments below. Furthermore, in the configuration of the invention described below, the same reference numerals are commonly used across different drawings for identical parts or parts having the same function, and repetitive descriptions thereof may be omitted. Additionally, hatching of the same elements constituting the drawings may be appropriately omitted or changed across different drawings. Furthermore, even if an element is depicted as a single element in a circuit diagram, it may be composed of multiple elements as long as there are no functional issues. For example, multiple transistors acting as switches may be connected in series or parallel. Additionally, capacitors may be divided and placed at multiple locations. In addition, a single conductor may have multiple functions, such as wiring, electrodes, and terminals, and multiple designations may be used for the same element in this specification. Furthe