Array substrate

• US 10,629,636 B1
• Filed: 01/23/2019
• Issued: 04/21/2020
• Est. Priority Date: 10/12/2018
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Chang, Chi-Ho, Fan, Sheng-Chin
• Primary Examiner(s): Luu, Chuong A
• Application Number:
  US16/254,607
• Publication Number:
  US 20200119057A1
• Time in Patent Office: 454 Days
• Field of Search: 257 49
• CPC Class Codes: G02F 1/1343 Electrodes reflective electrodes G02F1/133553
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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 27/1248 with a particular composition or shape of the interlayer dielectric specially adapted to the circuit arrangement
• CPC Class Codes: H01L 27/1255 integrated with passive devices, e.g. auxiliary capacitors
• CPC Class Codes: H01L 29/78663 Amorphous silicon transistors

Abstract

An array substrate including a substrate, pixel structures, color filter patterns, a first common electrode layer, a second common electrode layer, a conductive structure, and a conductive pattern is provided. The substrate has a display area and a peripheral area. Each pixel structure is disposed in the display area and includes an active device and a pixel electrode. The color filter patterns are respectively disposed corresponding to the pixel structures. The first common electrode layer and the second common electrode layer are sequentially disposed on the color filter patterns, and are structurally separated from the pixel electrodes. The conductive structure is disposed in the peripheral area, and includes a first conductive layer, a second conductive layer and a third conductive layer sequentially disposed on the substrate, wherein the first conductive layer and the first common electrode layer belong to a first same layer, the second conductive layer and the pixel electrodes belong to a second same layer, the third conductive layer and the second common electrode layer belong to a third same layer. The conductive pattern is disposed in the peripheral area, and is electrically connected to the conductive structure.

Claims

1. An array substrate, comprising:

a substrate having a display area and a peripheral area, the peripheral area being located on at least one side of the display area;

a plurality of pixel structures located in the display area of the substrate, wherein each of the pixel structures comprises an active device and a pixel electrode;

a plurality of color filter patterns located in the display area of the substrate and disposed corresponding to the pixel structures;

a first common electrode layer disposed on the color filter patterns and structurally separated from the pixel electrodes;

a second common electrode layer disposed on the first common electrode layer and structurally separated from the pixel electrodes;

an conductive structure located in the peripheral area of the substrate, wherein the conductive structure comprises a first conductive layer, a second conductive layer and a third conductive layer sequentially disposed on the substrate, the first conductive layer and the first common electrode layer belong to a first patterned layer, the second conductive layer and the pixel electrodes belong to a second patterned layer, and the third conductive layer and the second common electrode layer belong to a third patterned layer; and

a conductive pattern located in the peripheral area of the substrate, wherein the conductive structure is electrically connected to the conductive pattern.

2. The array substrate of claim 1, wherein the first common electrode layer is in contact with the color filter patterns.

3. The array substrate of claim 1, wherein the first common electrode layer and the second common electrode layer have same contours on a vertical projection plane perpendicular to a normal direction of the substrate.

4. The array substrate according to claim 1, wherein the first common electrode layer has a plurality of first slits corresponding to the pixel electrodes, and the second common electrode layer has a plurality of second slits corresponding to the pixel electrodes, wherein the first slits respectively overlap the second slits on a vertical projection plane perpendicular to a normal direction of the substrate.

5. The array substrate of claim 1, wherein the first common electrode layer is directly connected to the first conductive layer, the second common electrode layer is directly connected to the third conductive layer, and the pixel electrodes are structurally separated from the second conductive layer.

6. The array substrate of claim 1, further comprising:

a plurality of pad structures located in the peripheral area of the substrate, wherein each of the pad structures includes a fourth conductive layer, a fifth conductive layer, and a sixth conductive layer sequentially disposed on the substrate, the fourth conductive layer and the first common electrode layer belong to a first patterned layer, the fifth conductive layer and the pixel electrodes belong to a second patterned layer, and the sixth conductive layer and the second common electrode layer belong to a third patterned layer.

7. The array substrate according to claim 1, further comprising:

a plurality of sensing lines disposed on the first common electrode layer, wherein

the second common electrode layer is divided into a plurality of sensing electrodes, and the sensing lines are electrically connected to the sensing electrodes respectively.

8. The array substrate of claim 7, further comprising:

a plurality of signal lines disposed on the first common electrode layer, wherein

the signal lines and the sensing lines belong to the same layer, and the first common electrode layer is divided into a plurality of strip electrodes, and the signal lines are electrically connected to the strip electrodes respectively.

9. The array substrate according to claim 7, wherein the first common electrode layer is divided into a plurality of block electrodes, and the block electrodes are overlapped with the sensing electrodes on a vertical projection plane perpendicular to a normal direction of the substrate, and each of the sensing lines is electrically connected to the corresponding sensing electrode and the corresponding block electrode, wherein the first common electrode layer and the second common electrode layer have same contours on the vertical projection plane perpendicular to the normal direction of the substrate, wherein the first common electrode layer has a plurality of first slits corresponding to the pixel electrodes, the second common electrode layer has a plurality of second slits corresponding to the pixel electrodes, wherein the first slits respectively overlap the second slits on the vertical projection plane perpendicular to the normal direction of the substrate.

10. The array substrate of claim 7, wherein the first common electrode layer is structurally separated from the first conductive layer, the second common electrode layer is structurally separated from the third conductive layer, and the pixel electrodes are structurally separated from the second conductive layer.