KR-20260068028-A - LIGHT EMITTING DISPLAY DEVICE

KR20260068028AKR 20260068028 AKR20260068028 AKR 20260068028AKR-20260068028-A

Abstract

A light-emitting display device according to one embodiment comprises: a plurality of data lines extended in a first direction; a first semiconductor including a channel, a source region, and a drain region of a driving transistor located on a substrate; a gate electrode of the driving transistor that overlaps with the channel of the driving transistor; a second semiconductor including a channel, a source region, and a drain region of a third transistor located on the substrate; a first connection electrode; and a voltage line that applies a first voltage having a constant voltage level located on the substrate, wherein the first connection electrode comprises a first connection portion electrically connected to the gate electrode of the driving transistor; a second connection portion connected to the second electrode of the third transistor; and a main body located between the first connection portion and the second connection portion, wherein the voltage line surrounds at least a portion of the second connection portion of the first connection electrode, and the portion of the second connection portion of the first connection electrode surrounded by the voltage line is located between two adjacent data lines in a plane.

Inventors

이해연
방현철
이봉원
김수진

Assignees

삼성디스플레이 주식회사

Dates

Publication Date: 20260513
Application Date: 20260408

Claims (13)

Multiple data lines extended in the first direction; A first semiconductor comprising a channel, a source region, and a drain region of a driving transistor located on a substrate; The gate electrode of the driving transistor that overlaps with the channel of the driving transistor; A second semiconductor comprising a channel, source region, and drain region of a third transistor located on the substrate; First connecting electrode; and It includes a voltage line positioned on the above substrate and applying a first voltage having a constant voltage level, The above first connecting electrode is A first connection portion electrically connected to the gate electrode of the driving transistor; A second connection portion connected to the second electrode of the third transistor; and It includes a main body located between the first connecting part and the second connecting part, and The above voltage line surrounds at least a portion of the second connection part of the first connection electrode, and A light-emitting display device in which a portion of the second connection part of the first connection electrode surrounded by the voltage line is located between two adjacent data lines on a plane.
In paragraph 1, A seventh transistor located on the substrate and comprising a channel, a source region, and a drain region made of the first semiconductor; and It further includes a fourth transistor located on the substrate and comprising a channel, a source region, and a drain region made of the second semiconductor, and The above voltage line is A first voltage line electrically connected to the source region of the fourth transistor; and A light-emitting display device further comprising a second voltage line electrically connected to the drain region of the seventh transistor.
In paragraph 2, The above second voltage line is a light-emitting display device that surrounds at least a portion of the second connection part of the above first connection electrode.
In paragraph 2, It further includes a scan line located on the substrate and extended in a second direction perpendicular to the first direction, and The first voltage line above extends in the second direction, and The above second voltage line is a light-emitting display device that extends in a zigzag shape to include a bend in the above second direction.
In Paragraph 4, A light-emitting display device in which a portion of the bend of the second voltage line surrounds the second connection portion of the first connection electrode.
In paragraph 2, A first gate insulating film positioned on the first semiconductor and covering the first semiconductor; A first interlayer insulating film positioned on the first gate insulating film and covering the first gate insulating film and the gate electrode of the driving transistor; A second interlayer insulating film positioned on the first interlayer insulating film and covering the first interlayer insulating film; A second gate insulating film positioned on the second interlayer insulating film and covering the second interlayer insulating film; A third interlayer insulating film positioned on the second gate insulating film and covering the second gate insulating film; and It further includes a first planarization film located on the third interlayer insulating film and covering the third interlayer insulating film, and The second semiconductor is a light-emitting display device located between the second interlayer insulating film and the second gate insulating film.
In paragraph 6, The first connecting electrode is located between the third interlayer insulating film and the first planarization film, and A light-emitting display device in which the first voltage line, the second voltage line, and the first connecting electrode are located on the same layer.
In paragraph 6, The plurality of data lines above are a light-emitting display device located on the first planarization film.
In paragraph 6, A light-emitting display device in which the first connection portion of the first connection electrode is electrically connected to the gate electrode of the driving transistor through a first opening formed in the first interlayer insulating film, the second interlayer insulating film, the second gate insulating film, and the third interlayer insulating film.
In paragraph 6, A light-emitting display device in which the second connection portion of the first connection electrode is electrically connected to the source region of the third transistor through a second opening formed in the second gate insulating film and the third interlayer insulating film.
In paragraph 1, A light-emitting display device in which the first semiconductor and the second semiconductor are each located on different layers.
In Paragraph 11, A light-emitting display device comprising at least one different material, wherein the first semiconductor and the second semiconductor are a light-emitting display device.
In paragraph 1, A light-emitting display device in which the voltage line applying the first voltage is an initialization voltage line, and the first voltage is an initialization voltage.

Description

Light Emitting Display Device The present disclosure relates to a light-emitting display device. Among light-emitting display devices, an organic light-emitting display comprises two electrodes and an organic light-emitting layer located between them. Electrons injected from one electrode and holes injected from the other electrode combine in the organic light-emitting layer to form excitons. As the excitons transition from the excited state to the ground state, they release energy and emit light. Such an organic light-emitting display device includes a plurality of pixels comprising organic light-emitting diodes, which are self-luminous elements, and each pixel is formed with a plurality of transistors and one or more capacitors for driving the organic light-emitting diodes. The plurality of transistors basically include switching transistors and driving transistors. In the process of increasing the number of pixels to enhance the resolution of organic light-emitting displays and implementing high-speed driving to achieve stable video, the aperture ratio may decrease, current density may increase, and driving voltage may rise. Consequently, problems such as the occurrence of blemishes and reduced reliability of components like transistors arise. FIG. 1 is a circuit diagram of a light-emitting display device according to one embodiment. FIG. 2 is a plan view showing a light-emitting display device according to one embodiment. Figure 3 is a cross-sectional view along the line III-III' of Figure 2. Figure 4 is a cross-sectional view along the line IV-IV' of Figure 2. Figure 5 is a cross-sectional view along the V-V' line of Figure 2. FIGS. 6 to 12 are plan views illustrating a light-emitting display device according to one embodiment sequentially in the manufacturing order. FIG. 13 is a schematic diagram illustrating the effect of a light-emitting display device according to one embodiment. Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings. Furthermore, when it is said that a part, such as a layer, membrane, region, or plate, is "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when it is said that a part is "directly above" another part, it means that there is no other part in between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" in the direction opposite to gravity. Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side. Below, we will examine the light-emitting display device with reference to the drawings. First, a pixel of a light-emitting display device according to one embodiment will be described. FIG. 1 is a circuit diagram of a light-emitting display device according to one embodiment. Referring to FIG. 1, a pixel (PX) of a light-emitting display device according to one embodiment includes a plurality of transistors (T1, T2, T3, T4, T5, T6, T7), a holding capacitor (Cst), a boost capacitor (Cboost), and a light-emitting diode (LED) connected to a plurality of signal lines (127, 128, 151, 152, 153, 154, 155, 171, 172, 741). The light-emitting display device according to one embodiment includes a display area where an image is displayed, and such pixels (PX) are arranged in various forms in the display area. A plurality of signal lines (127, 128, 151, 152, 153, 154, 155, 171, 172, 741) are connected to a single pixel (PX). The plurality of signal lines include a first initialization voltage line (127), a second initialization voltage line (128), a scan li