TRANSFLECTIVE LIQUID CRYSTAL DISPLAY PANEL

• US 20120062812A1
• Filed: 10/26/2010
• Published: 03/15/2012
• Est. Priority Date: 09/09/2010
• Status: Abandoned Application

• Current Assignee: Chunghwa Picture Tubes Limited (Tatung Co., Ltd.)
• Original Assignee: Chunghwa Picture Tubes Limited (Tatung Co., Ltd.)
• Inventors: Wu, Bo-Rong
• Application Number:
  US12/911,726
• Publication Number:
  US 20120062812A1
• Time in Patent Office: Days
• US Class Current: 349/43
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• 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 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence

Abstract

A transflective liquid crystal display panel includes a color filter substrate and a thin film transistor array substrate having a transmissive region and a reflective region defined thereon, a liquid crystal layer positioned between the CF substrate and the TFT array substrate, and at least a conductive spacer positioned in between the CF substrate and the TFT array substrate. The CF substrate includes a color filter array, at least a pixel electrode and a common electrode positioned between the pixel electrode and the CF array. The common electrode is electrically isolated from the pixel electrode. The TFT array substrate includes at least a TFT having a gate, a source and a drain positioned in the transmissive region, and at least a reflector positioned in the reflective region. The conductive spacer electrically connects the pixel electrode positioned on the CF substrate to the drain positioned on the TFT array substrate.

Claims

1. A transflective liquid crystal display (LCD) comprising:

a color filter (CF) substrate having a transmissive region and a reflective region defined thereon, the CF substrate further comprising;

a color filter array;

at least a pixel electrode; and

a common electrode positioned between the color filter array and the pixel electrode, the common electrode being electrically isolated from the pixel electrode;

a thin film transistor (TFT) array substrate having the transmissive region and the reflective region defined thereon, the TFT array substrate further comprising;

at least a thin film transistor positioned in the transmissive region, the thin film transistor having a gate, a source and a drain; and

at least a reflector positioned in the reflective region;

a liquid crystal (LC) layer sandwiched in between the CF substrate and the TFT array substrate; and

at least a conductive spacer positioned in between the CF substrate and the TFT array substrate and electrically connected to the drain and the pixel electrode.

2. The transflective LCD of claim 1, further comprising a first insulating layer electrically isolating the common electrode from the pixel electrode formed on the color filter array.

3. The transflective LCD of claim 1, further comprising a second insulating layer formed on the TFT array substrate in the transmissive region and the reflective region.

4. The transflective LCD of claim 3, wherein the second insulating layer in the reflective region comprises a rough surface.

5. The transflective LCD of claim 4, wherein the reflector is positioned on the rough surface of the second insulating layer.

6. The transflective LCD of claim 3, wherein the second insulating layer further comprises a contact hole exposing the drain in the transmissive region, and the conductive spacer is electrically connected to the drain and the pixel electrode through the contact hole.

7. The transflective LCD of claim 1, further comprising an in-cell retarder positioned in the reflective region in the CF substrate.

8. The transflective LCD of claim 1, wherein the conductive spacer comprises a conductive material.

9. The transflective LCD of claim 8, wherein the conductive material comprises Al, Ag or AlNd.

10. The transflective LCD of claim 1, wherein the conductive spacer comprises an insulating material and a conductive layer coating on the insulating material.