Array substrate, display panel and display device

• US 9,941,303 B1
• Filed: 06/28/2017
• Issued: 04/10/2018
• Est. Priority Date: 03/23/2017
• Status: Active Grant

• Current Assignee: Xiamen Tianma Micro-Electronics Co., Ltd.
• Original Assignee: Xiamen Tianma Micro-Electronics Co., Ltd.
• Inventors: Zhou, Hongbo
• Primary Examiner(s): BOOTH, RICHARD A
• Application Number:
  US15/635,857
• Time in Patent Office: 286 Days
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 1/13606 having means for reducing parasitic capacitance
• CPC Class Codes: G02F 1/136209 Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
• CPC Class Codes: G02F 1/136227 Through-hole connection of the pixel electrode to the active element through an insulation layer
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/123 pixel
• CPC Class Codes: H01L 27/1218 with a particular composition or structure of the substrate
• CPC Class Codes: H01L 27/1222 with a particular composition, shape or crystalline structure of the active layer
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 29/78633 with a light shield
• CPC Class Codes: H01L 29/78645 with multiple gate

Abstract

The present application provides an array substrate, a display panel and a display device. The array substrate includes: a substrate; gate lines and data lines located on the substrate, intersecting and insulated from each other, which define a plurality of sub-pixel areas; the sub-pixel areas each comprises: a thin-film transistor; a pixel electrode, a barrier metal electrode. An orthographic projection of the drain electrode on the substrate is located between orthographic projections of two adjacent data lines on the substrate, an orthographic projection of the barrier metal electrode on the substrate is located between the orthographic projection of the drain electrode on the substrate and the orthographic projection of at least one of the two adjacent data lines on the substrate.

Claims

1. An array substrate, comprising:

a substrate;

a plurality of gate lines located on the substrate;

a plurality of data lines located on the substrate, intersecting and insulated from the plurality of gate lines, wherein the plurality of gate lines and the plurality of data lines defined a plurality of sub-pixel areas;

wherein the plurality of sub-pixel areas each comprises;

a thin-film transistor;

a pixel electrode; and

a barrier metal electrode;

wherein the thin-film transistor comprises a source electrode, a drain electrode and a gate electrode, wherein the source electrode is connected with one of the plurality of data lines, the drain electrode is connected with the pixel electrode, and the gate electrode is connected with one of the plurality of gate lines; and

wherein an orthographic projection of the drain electrode on the substrate is located between orthographic projections of two adjacent data lines on the substrate, and an orthographic projection of the barrier metal electrode on the substrate is located between the orthographic projection of the drain electrode on the substrate and the orthographic projection of at least one of the two adjacent data lines on the substrate.

2. The array substrate according to claim 1, wherein

in each of the plurality of sub-pixel areas, the barrier metal electrode comprises a first barrier metal electrode and a second barrier metal electrode;

two adjacent data lines of the plurality of data lines comprise a first data line and a second data line;

between the first data line and the second data line, an orthographic projection of the first barrier metal electrode on the substrate is located between the orthographic projection of the drain electrode on the substrate and an orthographic projection of the first data line on the substrate, and an orthographic projection of the second barrier metal electrode on the substrate is located between the orthographic projection of the drain electrode on the substrate and an orthographic projection of the second data line on the substrate.

3. The array substrate according to claim 2, wherein

the first barrier metal electrode and the second barrier metal electrode have a same shape and a same size.

4. The array substrate according to claim 3, wherein

a distance between the drain electrode and the first data line is equal to a distance between the drain electrode and the second data line, and a distance between the drain electrode and the first barrier metal electrode is equal to a distance between the drain electrode and the second barrier metal electrode.

5. The array substrate according to claim 2, further comprising

an active layer, the active layer comprising a first section, a second section and a third section;

wherein the orthographic projection of the drain electrode on the substrate is located between orthographic projections of two adjacent gate lines on the substrate;

wherein the two adjacent gate lines comprises a first gate line and a second gate line;

wherein the drain electrode is located in a portion of the sub-pixel area close to the first gate line;

wherein the first section comprises a first end and a second end, the second end is opposite to the first end, and wherein the second section comprises a first end and a second end, the second end of the second section is opposite to the first end of the second section, wherein an orthographic projection of the first end of the first section and an orthographic projection of the first end of the second section on the substrate are located at a side of the orthographic projection of the first gate line on the substrate close to the orthographic projection of the drain electrode on the substrate, and an orthographic projection of the second end of the first section, an orthographic projection of the second end of the second section and an orthographic projection of the third section on the substrate are located at a side of the orthographic projection of the first gate line on the substrate away from the orthographic projection of the drain electrode on the substrate;

wherein the third section is connected with the second end of the first section and the second end of second section; and

wherein the first end of the first section is connected with the source electrode, and the first end of the second section is connected with the drain electrode.

6. The array substrate according to claim 5,

wherein the source electrode and the drain electrode are located at a source-drain metal layer, an insulating layer is placed between the source-drain metal layer and the active layer, the insulating layer comprises a via hole for source electrode and a via hole for drain electrode, the source electrode is connected with the first end of the first section through the via hole for source electrode, and the drain electrode is connected with the first end of the second section through the via hole for drain electrode;

and

wherein a distance between an orthographic projection of the via hole for source electrode on the substrate and the orthographic projection of the first gate line on the substrate is defined as h1, and a distance between an end of an orthographic projection of the via hole for drain electrode on the substrate away from the orthographic projection of the first gate line on the substrate and the orthographic projection of the first gate line on the substrate is defined as h2, h1>

h2.

7. The array substrate according to claim 5, wherein

both the first barrier metal electrode and the second barrier metal electrode are lateral extensions of the first gate line.

8. The array substrate according to claim 6, further comprising:

a light shading layer located between the active layer and the substrate;

wherein the orthographic projection of the first gate line on the substrate and an orthographic projection of the first section on the substrate have a first overlapping area, and the orthographic projection of the first gate line on the substrate and an orthographic projection of the second section on the substrate have a second overlapping area;

wherein the light shading layer comprises a first light shading portion and a second light shading portion, wherein an orthographic projection of the first light shading portion on the substrate covers the first overlapping area, an orthographic projection of the second light shading portion on the substrate covers the second overlapping area, wherein the first barrier metal electrode comprises an extension of the first light shading portion, and wherein the second barrier metal comprises an extension of the second light shading portion.

9. The array substrate according to claim 6, wherein

a distance between an end of the orthographic projection of the first barrier metal electrode on the substrate away from the orthographic projection of the first gate line on the substrate and the orthographic projection of the first gate line on the substrate is defined as h3, a distance between an end of the orthographic projection of the second barrier metal electrode on the substrate far away from the orthographic projection of the first gate line on the substrate and the orthographic projection of the first gate line on the substrate is defined as h4, wherein h3>

h2, and h4>

h2.

10. The array substrate according to claim 9, wherein

h1>

h3, and h1>

h4.

11. The array substrate according to claim 2, further comprising

an active layer, the active layer comprising a first section and a second section;

wherein the orthographic projection of the drain electrode on the substrate is located between orthographic projections of two adjacent gate lines on the substrate;

wherein the two adjacent gate lines are respectively a first gate line and a second gate line;

wherein the drain electrode is located in a portion of the sub-pixel area to the first gate line;

wherein the first section comprises a first end and a second end, the second end is opposite to the first end, wherein the second section comprises a first end and a second end, the second end of the second section is opposite to the first end of the second section, wherein an orthographic projection of the first end of the first section and an orthographic projection of the second section on the substrate are located at a side of the orthographic projection of the first gate line on the substrate close to the orthographic projection of the drain electrode on the substrate, an orthographic projection of the second end of the first section on the substrate is located at a side of the orthographic projection of the first gate line on the substrate away from the orthographic projection of the drain electrode on the substrate; and

wherein the source electrode and the drain electrode are located at a source-drain metal layer, wherein an insulating layer is disposed between the source-drain metal layer and the active layer, wherein the insulating layer comprises a via hole for source electrode and a via hole for drain electrode, the source electrode is connected with the second end of the first section through the via hole for source electrode, the drain electrode is connected with the first end of the second section through the via hole for drain electrode, and the first end of the first section is connected with the second end of the second section.

12. The array substrate according to claim 11, wherein

both the first barrier metal electrode and the second barrier metal electrode are lateral extensions of the first gate line.

13. The array substrate according to claim 11, further comprising:

a light shading layer located between the active layer and the substrate;

wherein the orthographic projection of the first gate line on the substrate and an orthographic projection of the first section on the substrate cooperatively form an overlapping area; and

wherein the light shading layer comprises a light shading portion, wherein an orthographic projection of the light shading portion on the substrate covers the overlapping area, and both the first barrier metal electrode and the second barrier metal electrode are extensions of the light shading portion.

14. The array substrate according to claim 11,

wherein a distance between an end of an orthographic projection of the via hole for drain electrode on the substrate far away from the orthographic projection of the first gate line on the substrate and the orthographic projection of the first gate line on the substrate is defined as h5;

and

wherein a distance between an end of the orthographic projection of the first barrier metal electrode on the substrate far away from the orthographic projection of the first gate line on the substrate and the orthographic projection of the first gate line on the substrate is h6, and wherein a distance between an end of the orthographic projection of the second barrier metal electrode on the substrate away from the orthographic projection of the first gate line on the substrate and the orthographic projection of the first gate line on the substrate is defined as h7, wherein h6>

h5 and h7>

h5.

15. The array substrate according to claim 2, wherein

the first barrier metal electrode and the second barrier metal electrode are stripes extending along a first direction, and the first direction is an extending direction of the data lines.

16. A display panel, comprising an array substrate, wherein the array substrate comprises:

a substrate;

a plurality of gate lines located on the substrate;

a plurality of data lines located on the substrate;

a plurality of sub-pixel areas defined by insulated intersecting of the plurality of gate lines and the plurality of data lines;

a thin-film transistor arranged corresponding to each of the plurality of sub-pixel areas;

a pixel electrode arranged corresponding to each of the plurality of sub-pixel areas; and

a barrier metal electrode arranged corresponding to each of the plurality of sub-pixel areas,

wherein the thin-film transistor comprises a source electrode, a drain electrode and a gate electrode, the source electrode is connected with one of the plurality of data lines, the drain electrode is connected with the pixel electrode, and the gate electrode is connected with one of the plurality of gate lines;

an orthographic projection of the drain electrode on the substrate is located between orthographic projections of two adjacent data lines on the substrate, and wherein an orthographic projection of the barrier metal electrode on the substrate is located between the orthographic projection of the drain electrode on the substrate and the orthographic projection of at least one of the two adjacent data lines on the substrate.

17. A display device, comprising a display panel, wherein the display panel comprises an array substrate, and the array substrate comprises:

a substrate;

a plurality of gate lines located on the substrate; and

a plurality of data lines located on the substrate, intersecting and insulated from the plurality of gate lines, wherein the plurality of gate lines and the plurality of data lines defined a plurality of sub-pixel areas;

wherein the plurality of sub-pixel areas each comprises;

a thin-film transistor;

a pixel electrode; and

a barrier metal electrode;

wherein the thin-film transistor comprises a source electrode, a drain electrode and a gate electrode, the source electrode is connected with one of the plurality of data lines, the drain electrode is connected with the pixel electrode, and the gate electrode is connected with one of the plurality of gate lines; and

wherein an orthographic projection of the drain electrode on the substrate is located between orthographic projections of two adjacent data lines on the substrate, and wherein an orthographic projection of the barrier metal electrode on the substrate is located between the orthographic projection of the drain electrode on the substrate and the orthographic projection of at least one of the two adjacent data lines on the substrate.