Disply device for minimizing thickness of bezel area

Patent metadata

Field	Value
Publication number	US-9276017-B2
Application number	US-201414584603-A
Country	US
Kind code	B2
Filing date	Dec 29, 2014
Priority date	Dec 30, 2013
Publication date	Mar 1, 2016
Grant date	Mar 1, 2016

Abstract

A display device including a first substrate. The first substrate including an active region and a dummy region formed in an outer edge of the active region, the active region including a plurality of pixel regions and being configured to implement an actual image, the dummy region including a gate in panel (GIP) circuit, control signal lines, a ground, and common lines. The GIP circuit is overlapped by at least a part of the control signal lines, the ground, and the common lines with an insulating layer interposed therebetween. The display device further includes a thin film transistor (TFT) for a shift register is provided in each of a plurality of stages of the GIP circuit; and a source contact hole and a gate contact hole of each TFT for the shift registers, the source contact hole and the gate contact hole being formed along a corresponding control signal line.

First claim

What is claimed is:

1. A display device comprising:
a first substrate including an active region and a dummy region formed in an outer edge of the active region, the active region including a plurality of pixel regions and being configured to implement an actual image, the dummy region including a gate in panel (GIP) circuit, control signal lines, a ground, and common lines, wherein the GIP circuit is overlapped by at least a part of the control signal lines, the ground, and the common lines with an insulating layer interposed therebetween;
a thin film transistor (TFT) for a shift register provided in each of a plurality of stages of the GIP circuit, each TFT for the shift registers including a source electrode configured to receive a signal along the control signal lines; and
a source contact hole and a gate contact hole of each TFT for the shift registers,
wherein each source contact hole of a corresponding TFT for a shift register provided in a previous stage of the GIP circuit and each gate contact hole of a corresponding TFT for a shift register provided in an adjacent stage of the GIP circuit are formed along a corresponding control signal line.

2. The display device of claim 1 , further comprising:
a plurality of gate lines and a plurality of data lines formed in the active region to define the plurality of pixel regions;
a switching TFT formed in each of the pixel regions; and
a passivation layer formed on the first substrate with the TFTs for the shift registers formed thereon.

3. The display device of claim 2 , wherein each switching TFT includes:
a gate electrode formed on the first substrate;
a gate insulating layer formed on the first substrate and covering the gate electrode;
a semiconductor layer formed on the gate insulating layer; and
a source electrode and a drain electrode formed on the semiconductor layer.

4. The display device of claim 3 , wherein the control signal lines are formed on the passivation layer.

5. The display device of claim 4 , wherein a source contact hole of a TFT for the shift register of a particular stage of the GIP circuit is spaced apart from a TFT for the shift register of a previous stage by a predetermined gap.

6. The display device of claim 3 , wherein the ground includes:
a first ground formed on the first substrate; and
a second ground formed on the passivation layer and electrically connected to the first ground through a contact hole.

7. The display device of claim 3 , wherein the common lines include:
a first common line formed on the first substrate; and
a second common line formed on the passivation layer and electrically connected to the first common line through a second contact hole.

8. The display device of claim 2 , further comprising:
a color filter layer formed on the passivation layer.

9. The display device of claim 8 , wherein the control signal lines, a second ground, and second common lines are formed on the color filter layer.

10. The display device of claim 2 , wherein the passivation layer is formed of photoacryl.

11. The display device of claim 2 , wherein the passivation layer is formed of an inorganic insulating material.

12. The display device of claim 2 , wherein the passivation layer includes:
an inorganic passivation layer; and
an organic passivation layer formed on the inorganic passivation layer.

13. The display device of claim 2 , further comprising:
an interlayer insulating layer formed on the passivation layer;
a third contact hole formed in the passivation layer and the interlayer insulating layer;
a fourth contact hole formed on the interlayer insulating layer; and
a connection line formed on the interlayer insulating layer and electrically connecting the control signal lines and the corresponding TFTs for the shift register through the third and fourth contact holes, respectively.

14. The display device of claim 1 , wherein each TFT for the shift registers includes:
a gate electrode exposed by the gate contact hole and configured to receive a gate signal through the gate contact hole;
a semiconductor layer formed on the gate electrode; and
a drain electrode formed on the semiconductor layer.

15. The display device of claim 14 , wherein a source electrode in a region where the gate contact hole is formed in each TFT for the shift registers is removed.

16. The display device of claim 1 , wherein the control signal lines include a clock signal line, an enable signal line, and a start signal line.

17. The display device of claim 1 , wherein the control signal lines completely overlap the GIP circuit.

18. The display device of claim 1 , further comprising:
a second substrate attached to the first substrate;
a black matrix formed on the second substrate; and
a liquid crystal layer formed between the first and second substrates.

19. The display device of claim 1 , further comprising:
a second substrate attached to the first substrate; and
a light emitting unit or an organic light emitting unit formed between the first and second substrates.

20. The display device of claim 1 , further comprising:
a second substrate attached to the first substrate; and
an electrophoretic layer formed between the first and second substrates.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Youngjang

Classifications

• G02F1/1368 Primary

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G09G3/3611

  Control of matrices with row and column drivers · CPC title

• G02F1/133514

  Colour filters · CPC title

• G09G2310/0286

  Details of a shift registers arranged for use in a driving circuit · CPC title

• G02F1/136277

  formed on a semiconductor substrate, e.g. of silicon · CPC title