Touch panel and touch display

• US 8,970,550 B2
• Filed: 08/12/2013
• Issued: 03/03/2015
• Est. Priority Date: 05/09/2013
• Status: Active Grant

• Current Assignee: HannStar Display Corporation
• Original Assignee: HannStar Display Corporation
• Inventors: Su, Ping-Yuan, Tsai, Kun-hua, LEE, Hsing-Ying, Yu, Chia-Hua, Lin, Yu-Cheng
• Primary Examiner(s): MARINELLI, PATRICK
• Application Number:
  US13/964,122
• Publication Number:
  US 20140333847A1
• Time in Patent Office: 568 Days
• Field of Search: 178 1801- 2004
• US Class Current: 345/174
• CPC Class Codes: G02F 2201/38 Anti-reflection arrangements
• CPC Class Codes: G06F 1/1692 the I/O peripheral being a secondary touch screen used as control interface, e.g. virtual buttons or sliders
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A touch panel that includes a first substrate, a touch sensing layer, a compensation pattern layer, a second substrate, and a first optical adhesive layer is provided. The touch sensing layer includes a plurality of electrode sets arranged in parallel, and each of the electrode sets includes a scan electrode and a plurality of sensing electrodes. An orthogonal projection of the touch sensing layer on the first substrate is not overlapped with an orthogonal projection of the compensation pattern layer on the first substrate. The compensation pattern layer and the touch sensing layer are located between the first substrate and the second substrate. The first optical adhesive layer is located between the first substrate and the second substrate. A touch display is also provided.

Claims

1. A touch panel comprising:

a first substrate;

a touch sensing layer comprising a plurality of electrode sets arranged in parallel, wherein each of the electrode sets comprises a scan electrode and a plurality of sensing electrodes;

a compensation pattern layer, wherein an orthogonal projection of the touch sensing layer on the first substrate is not overlapped with an orthogonal projection of the compensation pattern layer on the first substrate, and wherein the compensation layer is formed directly on the first substrate;

a second substrate, wherein the compensation pattern layer and the touch sensing layer are located between the first substrate and the second substrate, wherein the touch sensing layer is formed directly on a second substrate;

a first optical adhesive layer, located between the first substrate and the second substrate, bonding the compensation layer and the touch sensing layer together such that the first optical adhesive is attached directly to the first substrate, the second substrate, the compensation pattern layer, and the touch sensing layer; and

wherein a region where the touch sensing layer is located has a reflectivity R1, a region where the compensation pattern layer is located has a reflectivity R2, and a difference between R1 and R2 is less than 1%.

2. The touch panel as recited in claim 1, wherein the touch sensing layer further comprises a plurality of connection lines and a plurality of connection pads, parts of the connection lines are connected between the scan electrodes and parts of the connection pads, and the other parts of the connection lines are connected between the sensing electrodes and the other parts of the connection pads.

3. A touch display comprising:

a display panel comprising of a color filter substrate;

a first substrate located above the display panel;

a touch sensing layer comprising a plurality of electrode sets arranged in parallel, wherein each of the electrode sets comprises a scan electrode and a plurality of sensing electrodes, and wherein the touch sensing layer is formed directly on the color filter substrate;

a compensation pattern layer, wherein an orthogonal projection of the touch sensing layer on the first substrate is not overlapped with an orthogonal projection of the compensation pattern layer on the first substrate, wherein the compensation layer is formed directly on the first substrate, and wherein the touch sensing layer and the compensation pattern layer are both located between the first substrate and the display panel; and

a first optical adhesive layer, located between the first substrate and the display panel, bonding the compensation layer and the touch sensing layer together such that the first optical adhesive is attached directly to the first substrate, the color filter substrate, the compensation pattern layer, and the touch sensing layer; and

wherein a region where the touch sensing layer is located has a reflectivity R1, a region where the compensation pattern layer is located has a reflectivity R2, and an absolute value of a difference between R1 and R2 is less than 1%.

4. The touch display as recited in claim 3, wherein the touch sensing layer further comprises a plurality of connection lines and a plurality of connection pads, parts of the connection lines are connected between the scan electrodes and parts of the connection pads, and the other parts of the connection lines are connected between the sensing electrodes and the other parts of the connection pads.