Touch structure, LCD panel and display device

• US 9,678,377 B2
• Filed: 06/06/2014
• Issued: 06/13/2017
• Est. Priority Date: 11/15/2013
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Zhou, Xiaodong
• Primary Examiner(s): Mummalaneni, Nalini
• Assistant Examiner(s): MARTINEZ QUILES, IVELISSE
• Application Number:
  US14/409,337
• Publication Number:
  US 20160274397A1
• Time in Patent Office: 1,103 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133394 Piezoelectric elements associated with the cells
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 1/13685 Top gates
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

Provided are touch structure, LCD panel and display device. The touch structure comprises a plurality of first signal lines; a plurality of second signal lines, a plurality of crossing points being formed by cross arrangement of the plurality of first signal lines and the plurality of second signal lines which are insulated from each other; a plurality of touch units, corresponding to the plurality of crossing points one to one, wherein when one touch unit of the plurality of touch units is touched, the first signal line and the second signal line which form a crossing point corresponding to the touch unit generate electrical signals respectively; a controller, connected to the plurality of first signal lines and the plurality of second signal lines respectively, for calculating a contact position based on the electrical signal of the first signal line and the electrical signal of the second signal line respectively.

Claims

1. A touch structure of a liquid crystal display (LCD) panel, the touch structure comprising:

a plurality of first signal lines;

a plurality of second signal lines, a plurality of crossing points being formed by cross arrangement of the plurality of first signal lines and the plurality of second signal lines, the plurality of first signal lines and the plurality of second signal lines being insulated from each other;

a plurality of touch units, corresponding to the plurality of crossing points one to one, wherein when one touch unit of the plurality of touch units is touched, a first signal line of the plurality of first signal lines and a second signal line of the plurality of second signal lines which form a crossing point corresponding to the touch unit generate an electrical signal of the first signal line and an electrical signal of the second signal line respectively; and

a controller, connected to the plurality of first signal lines and the plurality of second signal lines respectively, for calculating a contact position based on the electrical signal of the first signal line and the electrical signal of the second signal line respectively,

wherein the touch unit comprises a piezoelectric material contact, by which the first signal line and the second signal line are respectively connected to a power supply, the first signal line and the second signal line are electrically connected to the power supply respectively when the piezoelectric material contact is touched, so as to generate the electrical signal of the first signal line and the electrical signal of the second signal line respectively, and

wherein the first signal line and the second signal line are respectively connected to a gate line of the LCD panel by the piezoelectric material contact, the first signal line and the second signal line are electrically connected to the gate line of the LCD panel respectively when the piezoelectric material contact is touched, so as to generate the electrical signal of the first signal line and the electrical signal of the second signal line respectively.

2. The touch structure according to claim 1, wherein:

the touch unit further comprises a first thin film transistor and a second thin film transistor, the piezoelectric material contact is connected to a first gate electrode of the first thin film transistor and a second gate electrode of the second thin film transistor respectively, a source electrode of the first thin film transistor and a source electrode of the second thin film transistor are respectively connected to the gate line of the LCD panel, a drain electrode of the first thin film transistor is connected to the second signal line, and a drain electrode of the second thin film transistor is connected to the first signal line.

3. The LCD panel referred to in claim 1, comprising:

the touch structure according to claim 1; and

a liquid crystal layer.

4. The LCD panel according to claim 3, further comprising:

a first substrate; and

a second substrate arranged oppositely to the first substrate,

wherein the liquid crystal layer is arranged between the first substrate and the second substrate,

wherein the first substrate is provided with a plurality of pixels, each of the plurality of pixels is provided with a thin film transistor, a gate electrode of the thin film transistor is connected to a gate line of the LCD panel, and a source electrode of the thin film transistor is connected to a data line of the LCD panel.

5. The LCD panel according to claim 4, wherein the thin film transistor has a top gate structure.

6. A display device, comprising the LCD panel according to claim 3.

7. The display device according to claim 6, further comprising:

a first substrate; and

a second substrate arranged oppositely to the first substrate,

wherein the liquid crystal layer is arranged between the first substrate and the second substrate,

wherein the first substrate is provided with a plurality of pixels, each of the plurality of pixels is provided with a thin film transistor, a gate electrode of the thin film transistor is connected to a gate line of the LCD panel, and a source electrode of the thin film transistor is connected to a data line of the LCD panel.

8. The display device according to claim 7, wherein the thin film transistor has a top gate structure.

9. The LCD panel according to claim 3, wherein:

the touch unit further comprises a first thin film transistor and a second thin film transistor, the piezoelectric material contact is connected to a first gate electrode of the first thin film transistor and a second gate electrode of the second thin film transistor respectively, a source electrode of the first thin film transistor and a source electrode of the second thin film transistor are respectively connected to the gate line of the LCD panel, a drain electrode of the first thin film transistor is connected to the second signal line, and a drain electrode of the second thin film transistor is connected to the first signal line.

10. A touch structure of a liquid crystal display (LCD) panel, the touch structure comprising:

a plurality of first signal lines;

a plurality of second signal lines, a plurality of crossing points being formed by cross arrangement of the plurality of first signal lines and the plurality of second signal lines, the plurality of first signal lines and the plurality of second signal lines being insulated from each other;

a plurality of touch units, corresponding to the plurality of crossing points one to one, wherein when one touch unit of the plurality of touch units is touched, a first signal line of the plurality of first signal lines and a second signal line of the plurality of second signal lines which form a crossing point corresponding to the touch unit generate an electrical signal of the first signal line and an electrical signal of the second signal line respectively; and

a controller, connected to the plurality of first signal lines and the plurality of second signal lines respectively, for calculating a contact position based on the electrical signal of the first signal line and the electrical signal of the second signal line respectively,

wherein the touch unit comprises a piezoelectric material contact, by which the first signal line and the second signal line are respectively connected to a power supply, the first signal line and the second signal line are electrically connected to the power supply respectively when the piezoelectric material contact is touched, so as to generate the electrical signal of the first signal line and the electrical signal of the second signal line respectively, and

wherein the first signal line and the second signal line are respectively connected to a data line of the LCD panel by the piezoelectric material contact, the first signal line and the second signal line are respectively connected to the data line of the LCD panel when the piezoelectric material contact is touched, so as to generate the electrical signal of the first signal line and the electrical signal of the second signal line respectively.

11. The touch structure according to claim 10, wherein:

the touch unit further comprises a first thin film transistor and a second thin film transistor, the piezoelectric material contact is connected to a first gate electrode of the first thin film transistor and a second gate electrode of the second thin film transistor respectively, a source electrode of the first thin film transistor and a source electrode of the second thin film transistor are respectively connected to the data line of the LCD panel, a drain electrode of the first thin film transistor is connected to the second signal line, and a drain electrode of the second thin film transistor is connected to the first signal line.

12. The LCD panel referred to in claim 10, comprising:

the touch structure according to claim 10; and

a liquid crystal layer.

13. The LCD panel according to claim 12, wherein:

the touch unit further comprises a first thin film transistor and a second thin film transistor, the piezoelectric material contact is connected to a first gate electrode of the first thin film transistor and a second gate electrode of the second thin film transistor respectively, a source electrode of the first thin film transistor and a source electrode of the second thin film transistor are respectively connected to the data line of the LCD panel, a drain electrode of the first thin film transistor is connected to the second signal line, and a drain electrode of the second thin film transistor is connected to the first signal line.