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KR-102964237-B1 - DISPLAY DEVICE

KR102964237B1KR 102964237 B1KR102964237 B1KR 102964237B1KR-102964237-B1

Abstract

A display device is provided. The display device includes a plurality of data lines extended in a first direction and first to third pixels connected to the plurality of data lines, wherein the first pixel includes a first pixel electrode that overlaps with the plurality of data lines in a thickness direction, the second pixel includes a second pixel electrode spaced apart from the plurality of data lines on a plane, and the third pixel includes a third pixel electrode that overlaps with the plurality of data lines in a thickness direction.

Inventors

  • 김기욱
  • 김양완
  • 나지수
  • 문중수
  • 박경진
  • 서명희
  • 정선이
  • 진창규

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260513
Application Date
20201231

Claims (20)

  1. A first data line extended in the first direction; A second data line extending in the first direction and adjacent to the first data line; A driving voltage line extending from the first direction and adjacent to the second data line; A third data line extending from the first direction and adjacent to the driving voltage line; A first pixel electrode connected to a first pixel circuit connected to the first data line and overlapping with the first and second data lines; A second pixel electrode connected to a second pixel circuit connected to the second data line and overlapping with the driving voltage line; It includes a third pixel electrode connected to a third pixel circuit connected to the third data line and overlapping with the third data line, The above driving voltage line is located between the above second data line and the above third data line, and The above driving voltage line is, A first portion overlapping with the second pixel electrode above; A second part branching from the first part and overlapping with the first pixel electrode; and It includes a third part that branches off from the first part and overlaps with the third pixel electrode, A part of the second part and a part of the third part are parallel, The first pixel including the first pixel electrode emits red light, the second pixel including the second pixel electrode emits green light, and the third pixel including the third pixel electrode emits blue light. A display device in which the distance between the second pixel electrode and the second data line is longer than the distance between the first pixel electrode and the first data line.
  2. delete
  3. In Article 1, A display device in which the area of the first pixel electrode is larger than the area of the second pixel electrode, and the area of the third pixel electrode is larger than the area of the first pixel electrode.
  4. In Article 1, The third pixel electrode is spaced apart from the first pixel electrode in the first direction or in a second direction perpendicular to the first direction, and The second pixel electrode is a display device spaced diagonally apart from the first pixel electrode or the third pixel electrode in the first direction and the second direction.
  5. In Article 1, The first pixel electrode and the third pixel electrode are arranged in the same row or the same column, and The second pixel electrode is a display device that is positioned in a different row and a different column from the first and third pixel electrodes.
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  7. In Article 1, A display device that further includes a fourth data line extending in the first direction and adjacent to the third data line.
  8. In Article 7, A display device further comprising a driving voltage line disposed on the same layer as the first to fourth data lines and disposed between the second and third data lines.
  9. In Article 8, The center of the first aperture region where the first pixel emits light and the center of the third aperture region where the third pixel emits light are spaced apart from the driving voltage line on a plane, A display device in which the second aperture region in which the second pixel emits light overlaps with the driving voltage line in the thickness direction.
  10. In Article 1, The above first pixel circuit is, A first transistor that controls the driving current flowing through the first pixel electrode; A second transistor that supplies a data voltage to a first node, which is the source electrode of the first transistor; A third transistor connecting a second node, which is the drain electrode of the first transistor, and a third node, which is the gate electrode of the first transistor; and A display device comprising a first coupling capacitor connected between the first pixel electrode, the fourth node, and the first data line.
  11. In Article 10, The above second pixel circuit is, A first transistor that controls the driving current flowing through the second pixel electrode; A second transistor that supplies a data voltage to a first node, which is the source electrode of the first transistor, based on a first gate signal; A third transistor that connects a second node, which is the drain electrode of the first transistor, and a third node, which is the gate electrode of the first transistor, based on a second gate signal; and A display device comprising a second coupling capacitor connected between the fourth node, which is the second pixel electrode, and the second data line.
  12. In Article 11, A display device in which the capacitance of the first coupling capacitor is greater than the capacitance of the second coupling capacitor.
  13. In Article 10, The above first pixel circuit is, A fourth transistor that supplies a first initialization voltage to the third node based on a third gate signal; A fifth transistor that supplies a driving voltage to the first node based on a light emission signal; A sixth transistor that connects the second node and the fourth node based on the above light emission signal; and A display device further comprising a seventh transistor that supplies a second initialization voltage to the fourth node based on a fourth gate signal.
  14. In Article 13, The display device further comprising an eighth transistor that supplies a bias voltage to the first node based on the fourth gate signal, wherein the first pixel circuit described above is a first pixel circuit.
  15. In Article 13, A display device in which the first transistor, the second transistor, the fifth transistor, the sixth transistor, and the seventh transistor correspond to a first type of transistor, and the third transistor and the fourth transistor correspond to a second type of transistor different from the first type.
  16. In Article 13, A display device in which the first pixel circuit receives each of the first to third gate signals once during one frame period and receives the fourth gate signal multiple times during one frame period.
  17. In Article 13, A display device in which the first pixel circuit receives the first to third gate signals during a first interval of a frame period, and receives the fourth gate signal during a second interval excluding the first interval and the first interval during a frame period.
  18. In Article 1, Substrate; A thin-film transistor disposed on the above substrate; A protective layer covering the above-mentioned thin-film transistor; and It further includes a flattening layer disposed on the above protective layer, and A display device in which the first and second data lines are disposed on the protective layer, and the first to third pixel electrodes are disposed on the flattening layer.
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  20. In Article 18, A display device in which the distance between the third data line and the third pixel electrode is shorter than the distance between the second data line and the second pixel electrode.

Description

Display Device The present invention relates to a display device. As the information society develops, the demand for display devices for displaying images is increasing in various forms. For example, display devices are being applied to various electronic devices such as smartphones, digital cameras, laptop computers, navigation systems, and smart televisions. By including light-emitting elements in which each pixel of the display panel can emit light independently, the display device can display images without a backlight unit that provides light to the display panel. The display device includes a plurality of pixels, data lines and gate lines connected to the plurality of pixels, a data driver that supplies a data voltage to the data lines, and a gate driver that supplies a gate signal to the gate lines. The data driver and the gate driver can drive the plurality of pixels according to a predetermined frequency. FIG. 1 is a perspective view showing a display device according to one embodiment. FIG. 2 is an exploded perspective view showing a display device according to one embodiment. FIG. 3 is a plan view showing a display panel according to one embodiment. FIG. 4 is a block diagram showing a display panel and a display driving unit according to one embodiment. FIG. 5 is a circuit diagram showing a pixel of a display device according to one embodiment. Figure 6 is a waveform of the signals supplied to the pixel shown in Figure 5. FIG. 7 is a diagram showing a method of driving a display device according to one embodiment. FIG. 8 is a waveform of signals supplied to a pixel during one frame in a display device according to one embodiment. FIG. 9 is a plan view showing a plurality of unit pixels in a display device according to one embodiment. Figure 10 is a cross-sectional view taken along the cutting line I-I' of Figure 9. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. When elements or layers are referred to as being "on" another element or layer, this includes cases where another layer or element is interposed directly on or in the middle of another element. Throughout the specification, the same reference numerals refer to the same components. Shapes, sizes, ratios, angles, numbers, etc., disclosed in the drawings for describing embodiments are exemplary and therefore the invention is not limited to the depicted details. Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may also be the second component within the technical scope of the present invention. The features of each of the various embodiments of the present invention may be combined or combined with one another, either partially or wholly, and may technically enable various interlocking and operation. Each embodiment may be implemented independently of one another or may be implemented together in an associated relationship. Specific embodiments will be described below with reference to the attached drawings. FIG. 1 is a perspective view showing a display device according to one embodiment, and FIG. 2 is an exploded perspective view showing a display device according to one embodiment. Referring to FIGS. 1 and 2, a display device (10) according to one embodiment includes a cover window (100), a display panel (300), a bracket (600), a main circuit board (700), and a lower cover (900). In this specification, "top," "top," and "top surface" refer to the upward direction, i.e., the Z-axis direction, with respect to the display device (10), and "bottom," "bottom," and "bottom surface" refer to the downward direction, i.e., the opposite direction of the Z-axis direction, with respect to the display device (10). Additionally, "left," "right," "up," and "down" refer to the direction when viewing the display device (10) from a plane. For example, "left" refers to the opposite direction of the X-axis direction, "right" refers to the X-axis direction, "up" refers to the Y-axis direction, and "down" refers to the opposite direction of the Y-axis direction. The display device (10) is a device for displaying video or still images and can be used as a display screen for various products such as televisions, laptops, monitors, billboards, and the Internet of Things (IOT)