Touch screen, color filter substrate and manufacturing methods thereof

• US 8,941,596 B2
• Filed: 05/18/2010
• Issued: 01/27/2015
• Est. Priority Date: 05/19/2009
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.)
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.)
• Inventors: Xie, Zhenyu, Chen, Xu, Liu, Xiang
• Primary Examiner(s): Sherman, Stephen
• Assistant Examiner(s): WILLIS, RANDAL L
• Application Number:
  US12/782,218
• Publication Number:
  US 20100295807A1
• Time in Patent Office: 1,715 Days
• Field of Search: 345/173
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0414 using force sensing means to determine a position
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A touch screen and a manufacturing method thereof, and a color filter substrate and a manufacturing method thereof are provided in the invention. The touch screen comprises a substrate, a plurality of touch regions defined by a plurality of first signal lines and a plurality of second signal lines are provided on the substrate. In each touch region, the first signal line is connected with a first piezoelectric switch, the second signal line is connected with a second piezoelectric switch, when the touch region is touched by a force the first piezoelectric switch and the second piezoelectric switch are turned on and transfer voltage signals respectively via the first signal line and the second signal line to determine the coordinate of the touched touch region.

Claims

1. A touch screen comprising a substrate, a plurality of touch regions defined by a plurality of first signal lines and a plurality of second signal lines being provided on the substrate, wherein in each touch region,

the first signal line is connected with a first piezoelectric switch, the second signal line is connected with a second piezoelectric switch, the first piezoelectric switch is a transistor type switch and comprises a first active layer, a first source electrode and a first drain electrode, the second piezoelectric switch is a transistor type switch and comprises a second active layer, a second source electrode and a second drain electrode;

when the touch region is touched by a force, the first piezoelectric switch and the second piezoelectric switch are turned on and transfer voltage signals respectively via the first signal line and the second signal line to determine the coordinate of the touched touch region;

the touch screen further comprises a first electrode and a second electrode;

the first active layer is formed by a piezoelectric film and provided in the touch region, the first signal line is used as the first source electrode, the first electrode is used as the first drain electrode and provides a working voltage, the first signal line and the first electrode are respectively connected with the first active layer, and a channel region of the first piezoelectric switch is formed between the first signal line and the first electrode;

the second active layer is formed by a piezoelectric film and provided in the touch region, the second signal line is used as the second source electrode, the second electrode is used as the second drain electrode and provides the working voltage, the second signal line and the second electrode are respectively connected with the second active layer, and a channel region of the second piezoelectric switch is formed between the second signal line and the second electrode; and

the first signal line and the first electrode are provided on the first active layer, a first insulating layer is formed on the first signal line and the first electrode, a fifth via hole and a sixth via hole are provided in the first insulating layer, the second electrode and the second signal line are provided on the first insulating layer and are connected with the second active layer respectively by the fifth via hole and the sixth via hole, a second insulating layer is formed on the second electrode and the second signal line, a first via hole and a second via hole are provided in the second insulating layer, the first via hole further passes through the first insulating layer to expose the surface of the first electrode, a working electrode for providing the working voltage is formed on the second insulating layer and is connected with the first electrode through the first via hole and with the second electrode through the second via hole.

2. The touch screen according to claim 1, wherein a light-blocking layer is further provided below the first active layer and the second active layer.

3. A color filter substrate comprising:

a substrate, a color filter structure layer and a touch structure layer for determining the coordinate of a touch point, which are provided on the substrate, the touch structure layer comprising a plurality of first signal lines and a plurality of second signal lines for defining a plurality of pixel regions, wherein in each of the pixel regions,

the first signal line is connected with a first piezoelectric switch, the second signal line is connected with a second piezoelectric switch, the first piezoelectric switch is a transistor type switch and comprises a first active layer, a first source electrode and a first drain electrode, the second piezoelectric switch is a transistor type switch and comprises a second active layer, a second source electrode and a second drain electrode;

when the pixel region is touched by a force, the first piezoelectric switch and the second piezoelectric switch are turned on and transfer voltage signals respectively via the first signal line and the second signal line to determine the coordinate of the touched pixel region;

the touch screen further comprises a first electrode and a second electrode;

the first active layer is formed by a piezoelectric film and provided in the pixel region, the first signal line is used as the first source electrode, the first electrode is used as the first drain electrode and provides a working voltage, the first signal line and the first electrode are respectively connected with the first active layer, and a channel region of the first piezoelectric switch is formed between the first signal line and the first electrode;

the second active layer is formed by a piezoelectric film and provided in the pixel region, the second signal line is used as the second source electrode, the second electrode is used as the second drain electrode and provides the working voltage, the second signal line and the second electrode are respectively connected with the second active layer, and a channel region of the second piezoelectric switch is formed between the second signal line and the second electrode;

a color resin layer is provided on the substrate, the first active layer and the second active layer are formed on the color resin layer;

the first signal line integrally and continuously extends, the second signal line discontinuously extends, two segments of the second signal line are formed on two sides of the first signal line, the segments of the second signal line are connected with each other by a connection electrode;

or the second signal line integrally and continuously extends, the first signal line discontinuously extends, two segments of the first signal line are formed on two sides of the second signal line, the segments of the first signal line are connected with each other by a connection electrode;

a first insulating layer is provided on the first signal line and the second signal line, the connection electrode is formed on the first insulating layer, a third via hole and a fourth via hole are provided in the first insulating layer, the segments of the second signal line or the first signal line are connected with each other by the connection electrode through the third via hole and the fourth via hole; and

a second insulating layer is formed on the connection electrode, a first via hole is provided above the first electrode, the first insulating layer and the second insulating layer in the first via hole are removed to expose the surface of the first electrode, a second via hole is provided above the second electrode, the first insulating layer and the second insulating layer in the second via hole are removed to expose the surface of the second electrode, a working electrode for providing the working voltage is formed on the second insulating layer, and is connected with the first electrode through the first via hole and is connected with the second electrode through the second via hole.

4. The color filter substrate according to claim 3, wherein the working electrode is simultaneously used as a common electrode of the color filter structure layer.

5. The color filter substrate according to claim 3, wherein a light-blocking layer is further provided below the first active layer and the second active layer.

6. A touch screen comprising a substrate, a plurality of touch regions defined by a plurality of first signal lines and a plurality of second signal lines being provided on the substrate, wherein in each touch region,

the first signal line is connected with a first piezoelectric switch, the second signal line is connected with a second piezoelectric switch, the first piezoelectric switch is a transistor type switch and comprises a first active layer, a first source electrode and a first drain electrode, the second piezoelectric switch is a transistor type switch and comprises a second active layer, a second source electrode and a second drain electrode;

when the touch region is touched by a force, the first piezoelectric switch and the second piezoelectric switch are turned on and transfer voltage signals respectively via the first signal line and the second signal line to determine the coordinate of the touched touch region;

the touch screen further comprises a first electrode and a second electrode;

the first active layer is formed by a piezoelectric film and provided in the touch region, the first signal line is used as the first source electrode, the first electrode is used as the first drain electrode and provides a working voltage, the first signal line and the first electrode are respectively connected with the first active layer, and a channel region of the first piezoelectric switch is formed between the first signal line and the first electrode;

the second active layer is formed by a piezoelectric film and provided in the touch region, the second signal line is used as the second source electrode, the second electrode is used as the second drain electrode and provides the working voltage, the second signal line and the second electrode are respectively connected with the second active layer, and a channel region of the second piezoelectric switch is formed between the second signal line and the second electrode; and

a light-blocking layer is further provided below the first active layer and the second active layer and prevents light from entering into the first active layer and the second active layer.

7. The touch screen according to claim 6, wherein the first signal line and the first electrode are provided on the first active layer, the second signal line and the second electrode are provided on the second active layer, a first insulating layer is formed on the first signal line, the first electrode, the second signal line and the second electrode, a first via hole and a second via hole are formed in the insulating layer, the first via hole is provided over the first electrode, the second via hole is provided over the second electrode, a working electrode for providing the working voltage is formed on the first insulating layer and is connected with the first electrode through the first via hole and with the second electrode through the second via hole.

8. The touch screen according to claim 7, wherein the first signal line integrally and continuously extends, the second signal line discontinuously extends, two segments of the second signal line are formed on two sides of the first signal line, the segments of the second signal line are connected with each other by a connection electrode;

or

the second signal line integrally and continuously extends, the first signal line discontinuously extends, two segments of the first signal line are formed on two sides of the second signal line, the segments of the first signal line are connected with each other by a connection electrode.

9. The touch screen according to claim 8, wherein the connection electrode is formed on the first insulating layer, a third via hole and a fourth via hole are provided in the first insulating layer, the segments of the second signal line or the first signal line are connected with each other by the connection electrode through the third via hole and the fourth via hole.

10. The touch screen according to claim 6, wherein the first signal line and the first electrode are provided on the first active layer, a first insulating layer is formed on the first signal line and the first electrode, a fifth via hole and a sixth via hole are provided in the first insulating layer, the second electrode and the second signal line are provided on the first insulating layer and are connected with the second active layer respectively by the fifth via hole and the sixth via hole, a second insulating layer is formed on the second electrode and the second signal line, a first via hole and a second via hole are provided in the second insulating layer, the first via hole further passes through the first insulating layer to expose the surface of the first electrode, a working electrode for providing the working voltage is formed on the second insulating layer and is connected with the first electrode through the first via hole and with the second electrode through the second via hole.