Transflective liquid crystal display panel

• US 7,755,725 B2
• Filed: 04/08/2008
• Issued: 07/13/2010
• Est. Priority Date: 09/26/2007
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Yang, Tun-Chun, Hu, Chih-Jen
• Primary Examiner(s): Nelms; David
• Assistant Examiner(s): Chung; David Y
• Application Number:
  US12/099,761
• Publication Number:
  US 20090079887A1
• Time in Patent Office: 826 Days
• Field of Search: 349/38, 349/39, 349/43, 349/113, 349/114
• US Class Current: 349/114
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode

Abstract

A transflective liquid crystal display panel is disclosed. The liquid crystal display panel includes an array substrate and a storage capacitor disposed on the array substrate. The array substrate includes a transmitting region and a reflecting region, in which the storage capacitor is disposed on the reflecting region of the array substrate. The storage capacitor also includes a first transparent conducting layer disposed on the array substrate, a dielectric layer disposed on the first transparent conducting layer, and a reflective conducting layer disposed on the dielectric layer.

Claims

1. A liquid crystal display panel, comprising:

an array substrate having a transmitting region and a reflecting region;

a storage capacitor disposed on the reflecting region of the array substrate, comprising;

a common electrode disposed on the array substrate;

a first dielectric layer disposed on the common electrode;

a metal electrode disposed on the first dielectric layer;

a second dielectric layer disposed on the metal electrode;

a first transparent conducting layer disposed on the second dielectric layer and electrically connected to the common electrode;

a third dielectric layer disposed on the first transparent conducting layer; and

a reflective conducting layer disposed on the third dielectric layer and electrically connected to the metal electrode.

2. The liquid crystal display panel of claim 1, wherein the metal electrode is electrically connected to a thin film transistor.

3. The liquid crystal display panel of claim 1, wherein a material of the first dielectric layer, the second dielectric layer, and the third dielectric layer comprises oxides, silicon oxides, silicon nitrides, silicon oxynitrides, or a combination thereof.

4. The liquid crystal display panel of claim 1, wherein a material of the first dielectric layer, the second dielectric layer, and the third dielectric layer comprises organic material, inorganic material, or a combination thereof.

5. The liquid crystal display panel of claim 1, wherein the first transparent conducting layer comprises an indium tin oxide layer or an indium zinc oxide layer.

6. The liquid crystal display panel of claim 1, further comprising a second transparent conducting layer disposed on the transmitting region of the array substrate.

7. The liquid crystal display panel of claim 6, wherein the second transparent conducting layer comprises an indium tin oxide layer or an indium zinc oxide layer.

8. The liquid crystal display panel of claim 6, wherein the second transparent conducting layer is a pixel electrode.

9. The liquid crystal display panel of claim 6, wherein the second transparent conducting layer is connected to the reflective conducting layer.

10. A pixel structure for liquid crystal display, wherein the pixel structure is fabricated on a substrate having a transmitting region and a reflecting region, the pixel structure comprising:

a thin film transistor disposed on the reflecting region of the substrate;

a stacked capacitor disposed on the reflecting region of the substrate, comprising;

a first conductive layer, disposed on the reflecting region of the substrate;

a first dielectric layer disposed on the first conductive layer;

a second conductive layer disposed on the first dielectric layer and electrically connected to the thin film transistor;

a second dielectric layer disposed on the second conductive layer;

a third conductive layer disposed on the second dielectric layer and electrically connected to the first conductive layer; and

a third dielectric layer disposed on the third conductive layer;

a reflective electrode disposed on the third dielectric layer on the reflecting region of the substrate, and electrically connected to the second conductive layer; and

a pixel electrode disposed on the transmitting region of the substrate and electrically connected to the thin film transistor.

11. The pixel structure of claim 10, wherein a material of the first dielectric layer, the second dielectric layer, and the third dielectric layer comprises oxides, silicon oxides, silicon nitrides, silicon oxynitrides, or a combination thereof.

12. The pixel structure of claim 10, wherein a material of the first dielectric layer, the second dielectric layer, and the third dielectric layer comprise organic material, inorganic material, or a combination thereof.

13. The pixel structure of claim 10, wherein the third conductive layer comprises an indium tin oxide layer or an indium zinc oxide layer.

14. The pixel structure of claim 10, wherein the pixel electrode comprises an indium tin oxide layer or an indium zinc oxide layer.

15. A liquid crystal display array substrate, comprising:

a substrate having a plurality of pixel structures thereon, each of the pixel structures comprises a transmitting region and a reflecting region, each pixel structure comprising;

a thin film transistor disposed on the reflecting region of the substrate;

a stacked capacitor disposed on the reflecting region of the substrate, comprising;

a first conductive layer disposed on the reflecting region of the substrate;

a first dielectric layer disposed on the first conductive layer;

a second conductive layer disposed on the first dielectric layer and electrically connected to the thin film transistor;

a second dielectric layer disposed on the second conductive layer;

a third conductive layer disposed on the second dielectric layer and electrically connected to the first conductive layer; and

a third dielectric layer disposed on the third conductive layer;

a reflective electrode disposed on the third dielectric layer on the reflecting region of the substrate, and electrically connected to the second conductive layer; and

a pixel electrode disposed on the transmitting region of the substrate and electrically connected to the thin film transistor.

16. The liquid crystal display array substrate of claim 15, wherein a material of the first dielectric layer, the second dielectric layer, and the third dielectric layer comprises oxides, silicon oxides, silicon nitrides, silicon oxynitrides, or a combination thereof.

17. The liquid crystal display array substrate of claim 15, wherein a material of the first dielectric layer, the second dielectric layer, and the third dielectric layer comprises organic material, inorganic material, or a combination thereof.

18. The liquid crystal display array substrate of claim 15, wherein the third conductive layer comprises an indium tin oxide layer or an indium zinc oxide layer.

19. The liquid crystal display array substrate of claim 15, wherein the pixel electrode comprises an indium tin oxide layer or an indium zinc oxide layer.

20. The liquid crystal display array substrate of claim 15, wherein the thin film transistor comprises a gate dielectric layer, wherein the gate dielectric layer is disposed on the same level as the first dielectric layer.

21. The liquid crystal display array substrate of claim 15 further comprising a semiconductor layer and another dielectric layer disposed between the first conductive layer and the substrate.