INDUCTIVE TOUCH SCREEN AND IN CELL INDUCTIVE TOUCH SCREEN

• US 20140333574A1
• Filed: 10/24/2013
• Published: 11/13/2014
• Est. Priority Date: 05/08/2013
• Status: Active Grant

• Current Assignee: Shanghai AVIC Optoelectronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Original Assignee: Shanghai AVIC Optoelectronics Company Limited (Tianma Microelectronics Company Limited)
• Inventors: XI, Kerui
• Granted Patent: US 9,170,699 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/046 by electromagnetic means

Abstract

An inductive touch screen is disclosed. Embodiments include a transparent substrate and a conductive layer. The conductive layer includes helical-shaped patterns, and inductive lines electrically connected with the patterns. The patterns form inductive electrodes and output inductive signals through the inductive lines, and the inductive lines include first and second inductive lines. The inductive electrodes includes rows of first sub-electrodes and rows of second sub-electrodes, where the first and second sub-electrodes are arranged alternately in a column direction. Each of the first inductive lines is electrically connected with a row of the first sub-electrodes, and each of the second inductive lines is electrically connected with the second sub-electrodes in a same column. The touch screen further includes a drive line on the substrate, and the drive line is electrically connected with the inductive electrodes to provide the touch screen with a drive signal.

Claims

1. An inductive touch screen, comprising:

a transparent substrate;

a conductive layer on the transparent substrate,

wherein the conductive layer comprises;

a plurality of helical-shaped first patterns, and

a plurality of inductive lines electrically connected with the first patterns, and wherein the first patterns form inductive electrodes arranged in an array and output inductive signals through the plurality of inductive lines, wherein the plurality of inductive lines comprise a plurality of first inductive lines and a plurality of second inductive lines electrically insulated from the first inductive lines, wherein the array of inductive electrodes comprises a plurality of rows of first sub-electrodes and a plurality of rows of second sub-electrodes, wherein the first sub-electrodes and the second sub-electrodes are arranged alternately in a column direction, wherein each of the first inductive lines is electrically connected with a row of the first sub-electrodes, wherein each of the second inductive lines is electrically connected with the second sub-electrodes in a same column, wherein the touch screen further comprises a drive line on the transparent substrate, and wherein the drive line is electrically connected with the inductive electrodes to provide the touch screen with a drive signal.

2. The inductive touch screen according to claim 1, wherein each of the inductive electrodes has two terminals, one of which is electrically connected with an inductive line, and the other of which is electrically connected with the drive line.

3. The inductive touch screen according to claim 1, wherein one terminal of each of the inductive lines is connected with an amplification circuit and further with a detection circuit.

4. The inductive touch screen according to claim 1, wherein the drive line comprises a plurality of sub-drive lines, each of the sub-drive lines is electrically connected with a row of the first sub-electrodes and a row of the second sub-electrodes, and a different row of the first sub-electrodes or the second sub-electrodes is electrically connected with a different sub-drive line.

5. The inductive touch screen according to claim 1, wherein the drive line is connected with an external voltage signal or grounded.

6. An in cell inductive touch screen, comprising:

a first substrate;

a second substrate arranged in opposition to the first substrate;

a conductive layer on an inner side of the first substrate, the conductive layer comprising a plurality of helical-shaped first patterns and a plurality of inductive lines electrically connected with the first patterns, wherein the first patterns form inductive electrodes arranged in an array and configured to output inductive signals through the plurality of inductive lines; and

a drive line on the inner side of the first substrate, the drive line being electrically connected with the inductive electrodes to provide the in cell touch screen with a drive signal.

7. The in cell inductive touch screen according to claim 6, wherein the in cell inductive touch screen further comprises:

a light shielding layer on the inner side of the first substrate, wherein the light shielding layer is electrically insulated from the conductive layer, wherein a projection of the conductive layer in a light transmission direction falls into an area occupied by the light shielding layer.

8. The in cell inductive touch screen according to claim 6, wherein the conductive layer is a light shielding layer, wherein the conductive layer further comprises a plurality of second patterns electrically insulated from the first patterns and the inductive lines, wherein the in cell inductive touch screen further comprises an insulation layer covering the conductive layer, and wherein the drive line is located on the insulation layer and electrically connected with the inductive electrodes through via holes in the insulation layer.

9. The in cell inductive touch screen according to claim 8 further comprising color films on the insulation layer.

10. The in cell inductive touch screen according to claim 7, wherein the light shielding layer comprises metal.

11. The in cell inductive touch screen according to claim 8, wherein the light shielding layer comprises metal.

12. The in cell inductive touch screen according to claim 7, wherein the drive line comprises the same material as the light shielding layer or comprises indium tin oxide.

13. The in cell inductive touch screen according to claim 8, wherein the drive line comprises the same material as the light shielding layer or comprises indium tin oxide.

14. The in cell inductive touch screen according to claim 6, wherein the first substrate is an array substrate.