Touch panel and touch display panel

• US 8,531,413 B2
• Filed: 02/24/2010
• Issued: 09/10/2013
• Est. Priority Date: 02/24/2009
• Status: Active Grant

• Current Assignee: Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: Kuo, Chien-Chung, Chi, Chun-Chi, Liu, Yu-Chen
• Primary Examiner(s): Lao, Lun-Yi
• Assistant Examiner(s): MERKOULOVA, OLGA VLADIMIROVNA
• Application Number:
  US12/711,254
• Publication Number:
  US 20100214264A1
• Time in Patent Office: 1,294 Days
• Field of Search: 345173-179, 349/12, 349/117, 349/118, 349/119, 349/120, 178/18.09, 178/19.01, 178/19.05
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display

Abstract

A touch display panel and a touch panel therein are provided. The touch panel includes a first transparent supporter plate, a second transparent supporter plate, and a touch module. The second transparent supporter plate and the touch module are disposed over the first transparent supporter plate. The first transparent supporter plate and the second transparent supporter plate have optical anisotropy. The first transparent supporter plate has a first fast axis and a first slow axis, and the second transparent supporter plate has a second fast axis and a second slow axis. A direction of the second fast axis is substantially perpendicular to a direction of the first fast axis, and a direction of the second slow axis is substantially perpendicular to a direction of the first slow axis. The touch panel of the present invention is helpful to improve display quality of the touch display panel having the touch panel.

Claims

1. A touch panel, comprising:

a first transparent supporter plate having optical anisotropy, wherein the first transparent supporter plate has a first fast axis and a first slow axis;

a second transparent supporter plate having optical anisotropy, the second transparent supporter plate being disposed over the first transparent supporter plate, and having a second fast axis and a second slow axis, wherein a direction of the second fast axis is substantially perpendicular to a direction of the first fast axis, and a direction of the second slow axis is substantially perpendicular to a direction of the first slow axis;

a touch module disposed over the first transparent supporter plate, wherein the second transparent supporter plate is located between the first transparent supporter plate and the touch module;

a circular polarizer; and

a first phase retardation plate, the touch module being located between the circular polarizer and the second transparent supporter plate, wherein the circular polarizer comprises a linear polarizer and a second phase retardation plate, the first transparent supporter plate is located between the first phase retardation plate and the second transparent supporter plate, the second phase retardation plate is located between the linear polarizer and the touch module, and the first phase retardation plate and the second phase retardation plate both provide λ

/4 phase retardation.

2. The touch panel as claimed in claim 1, wherein the first transparent supporter plate and the second transparent supporter plate are both made of same material comprising polycarbonate, polyethersulfone, or amorphous polyolefne, and a thickness of the first transparent supporter plate is substantially equal to a thickness of the second transparent supporter plate.

3. The touch panel as claimed in claim 1, wherein the touch module comprises a capacitive touch module or a resistance touch module.

4. A touch display panel, comprising:

a display panel, comprising;

a pixel array substrate comprising a plurality of pixel structures arranged in array;

an opposite substrate;

a polarizer disposed on the opposite substrate; and

a display medium layer located between the pixel array substrate and the opposite substrate; and

a touch panel disposed over the display panel and comprising;

a first transparent supporter plate having optical anisotropy, wherein the first transparent supporter plate has a first fast axis and a first slow axis;

a second transparent supporter plate having optical anisotropy, the second transparent supporter plate being disposed over the first transparent supporter plate and having a second fast axis and a second slow axis, wherein a direction of the second fast axis is substantially perpendicular to a direction of the first fast axis, and a direction of the second slow axis is substantially perpendicular to a direction of the first slow axis;

a touch module disposed over the first transparent supporter plate, wherein the second transparent supporter plate is located between the first transparent supporter plate and the touch module;

a circular polarizer; and

a first phase retardation plate, the touch module being located between the circular polarizer and the second transparent supporter plate, wherein the circular polarizer comprises a linear polarizer and a second phase retardation plate, the first transparent supporter plate is located between the first phase retardation plate and the second transparent supporter plate, the second phase retardation plate is located between the linear polarizer and the touch module, and the first phase retardation plate and the second phase retardation plate both provide λ

/4 phase retardation.

5. The touch display panel as claimed in claim 4, wherein the first transparent supporter plate and the second transparent supporter plate are both made of same material comprising polycarbonate, polyethersulfone, or amorphous polyolefne, and a thickness of the first transparent supporter plate is substantially equal to a thickness of the second transparent supporter plate.

6. The touch display panel as claimed in claim 4, wherein the touch module comprises a capacitive touch module or a resistance touch module.