Display device

• US 9,829,735 B2
• Filed: 02/10/2016
• Issued: 11/28/2017
• Est. Priority Date: 04/10/2015
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Park, Seung Hyun, Song, Jun Ho, Song, Jean Ho
• Primary Examiner(s): Caley, Michael
• Assistant Examiner(s): Qureshi, Mariam
• Application Number:
  US15/040,909
• Publication Number:
  US 20160299385A1
• Time in Patent Office: 657 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133707 Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/13606 having means for reducing parasitic capacitance
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
• 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

Abstract

There is provided a display device including a first substrate, a second substrate facing the first substrate, a display layer disposed between the first and the second substrates, a light blocking pattern, and a sensing line. The first substrate may include a thin film transistor (TFT) disposed on a base substrate, a first passivation layer disposed on the TFT, a color filter disposed on the first passivation layer, and a second passivation layer disposed on the color filter. The display layer may include a first electrode disposed on the second passivation layer, a third passivation layer disposed on the first electrode, a second electrode disposed on the third passivation layer and connected to the TFT, and an optical layer disposed between the first and the second substrates. The light blocking pattern may be disposed on the third passivation layer. The sensing line may be disposed on the light blocking pattern.

Claims

1. A display device comprising:

a first substrate including a thin film transistor (TFT) disposed on a base substrate in a pixel area, a first passivation layer disposed on the TFT, a color filter disposed on the first passivation layer, and a second passivation layer disposed on the color filter;

a second substrate facing the first substrate;

a display layer disposed between the first substrate and the second substrate, and including a first electrode disposed on the second passivation layer, a third passivation layer disposed on the first electrode, a second electrode disposed on the third passivation layer in the pixel area and connected to the TFT through a first contact hole, and an optical layer that allows light to be transmitted therethrough or blocks light according to an electric field formed between the first electrode and the second electrode, and;

a light blocking pattern disposed on an outer side of the pixel area on the third passivation layer; and

a sensing line disposed on the light blocking pattern and connected to the first electrode through a second contact hole, wherein at least a portion of the sensing line is disposed with the light blocking pattern interposed between the TFT and the portion of the sensing line.

2. The display device of claim 1,

wherein the TFT is connected to a data line and a gate line, and

wherein the sensing line is parallel to the gate line and at least a portion of the sensing line overlaps the gate line.

3. The display device of claim 1,

wherein the TFT is connected to the gate line and the data line,

wherein the light blocking pattern includes a first light blocking pattern parallel to the gate line and a second light blocking pattern parallel to the data line, and

wherein the sensing line includes a first line disposed on the first light blocking pattern and parallel to the gate line and a second line disposed on the second light blocking pattern and parallel to the data line.

4. The display device of claim 3, wherein at least a portion of the first line overlaps the gate line and at least a portion of the second line overlaps the data line.

5. The display device of claim 1,

wherein the TFT includes a gate electrode, a semiconductor layer, a gate insulating layer disposed between the gate electrode and the semiconductor layer, and a source electrode and a drain electrode, and

wherein the gate insulating layer, the first passivation layer, and the third passivation layer include at least one of a silicon oxide and a silicon nitride.

6. The display device of claim 5, wherein the color filter, the second passivation layer, and the light blocking pattern include an organic material.

7. The display device of claim 1, wherein the first electrode is a common electrode to which a common voltage is applied, and is a sensing electrode to which a touch scan signal is input through the sensing line.

8. The display device of claim 1, wherein the first electrode and the second electrode include a transparent conductive oxide.

9. A display device comprising:

a gate electrode disposed on a base substrate including a pixel area and connected to a gate line;

a gate insulating layer disposed on the gate line and the gate electrode;

a semiconductor layer disposed on the gate insulating layer and overlapping the gate electrode in at least a portion thereof;

a source electrode connected to one end of the semiconductor layer and a data line;

a drain electrode connected to another end of the semiconductor layer and disposed to be spaced apart from the source electrode;

a first passivation layer covering the source electrode and the drain electrode;

a color filter disposed on the first passivation layer;

a second passivation layer disposed on the color filter;

a common electrode disposed on the second passivation layer;

a third passivation layer disposed on the common electrode;

a pixel electrode disposed on the third passivation layer within the pixel area and connected to the drain electrode;

a light blocking pattern disposed on an outer side of the pixel area and parallel to at least one of the gate line and the data line;

a sensing line disposed on the light blocking pattern and connected to the common electrode through a contact hole;

a counter substrate facing the base substrate; and

a liquid crystal layer disposed between the pixel electrode and the counter substrate, wherein at least a portion of the sensing line is disposed with the light blocking pattern interposed between the gate electrode and the portion of the sensing line.

10. The display device of claim 9, wherein the sensing line is parallel to the gate line, and at least a portion of the sensing line overlaps the gate line.

11. The display device of claim 9,

wherein the light blocking pattern includes a first light blocking pattern parallel to the gate line and a second light blocking pattern parallel to the data line, and

wherein the sensing line includes a first line disposed on the first light blocking pattern and parallel to the gate line and a second line disposed on the second light blocking pattern and parallel to the data line.

12. The display device of claim 11, wherein at least a portion of the first line overlaps the gate line, and at least a portion of the second line overlaps the data line.

13. The display device of claim 9, wherein the gate insulating layer, the first passivation layer, and the third passivation layer include at least one of a silicon oxide and a silicon nitride.

14. The display device of claim 13, wherein the color filter, the second passivation layer, and the light blocking pattern include an organic material.

15. The display device of claim 9, wherein the first electrode is a common electrode to which a common voltage is applied, and is a sensing electrode to which a touch scan signal is input through the sensing line.

16. The display device of claim 9, wherein the first electrode and the second electrode include a transparent conductive oxide.