Touch display panel and driving method

• US 10,296,120 B2
• Filed: 08/16/2017
• Issued: 05/21/2019
• Est. Priority Date: 09/22/2016
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Xi, Peng-Bo, Su, Sung-Yu
• Primary Examiner(s): Shen, Yuzhen
• Application Number:
  US15/678,623
• Publication Number:
  US 20180081472A1
• Time in Patent Office: 643 Days
• CPC Class Codes: G02F 1/1323 Arrangements for providing a switchable viewing angle
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134381 Hybrid switching mode, i.e. for applying an electric field with components parallel and orthogonal to the substrates
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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: G09G 2300/0447 for multi-domain technique to improve the viewing angle in a liquid crystal display, such as multi-vertical alignment [MVA]
• CPC Class Codes: G09G 2310/027 Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
• CPC Class Codes: G09G 2320/068 for control of viewing angle adjustment
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general

Abstract

A touch display panel and a driving method thereof are disclosed. The touch display panel includes a plurality of pixels, a plurality of viewing angle control (VAC) electrode units, and a plurality of touch receiving electrode units. Each pixel includes a pixel electrode and a common electrode. At least one of the pixel electrode and the common electrode has a plurality of slits. The VAC electrode units are arranged along a first direction. Each VAC electrode unit includes a plurality of first VAC electrode series and a plurality of second VAC electrode series, and each first VAC electrode series and each second VAC electrode series are alternately arranged along the first direction. The touch receiving electrode units are arranged along the second direction, and the VAC electrode units and the touch receiving electrode unit form a touch unit.

Claims

1. A touch display panel, comprising:

a first substrate;

a second substrate;

a third substrate, wherein the second substrate is positioned between the first substrate and the third substrate;

a medium display layer positioned between the first substrate and the second substrate;

a plurality of pixels positioned between the first substrate and the medium display layer, wherein each of the pixels comprises a pixel electrode and a common electrode, and at least one of the pixel electrode and the common electrode has a plurality of slits;

a plurality of viewing angle control electrode units positioned between the second substrate and the medium display layer, and arranged in sequence along a first direction in a X axis;

a plurality of touch receiving electrode units positioned between the second substrate and the third substrate, and arranged along in sequence a second direction in a Y axis, wherein the plurality of touch receiving electrode units are partially overlapping with the viewing angle control electrode units in a vertical direction in a Z axis projected on the first substrate, and the viewing angle control electrode units and the touch receiving electrode units form a touch unit; and

a plurality of first connection lines and a plurality of second connection lines, wherein the first connection lines and the second connection lines are provided between the first substrate and the medium display layer, each of the first connection lines is respectively electrically connected to the first viewing angle control electrode series corresponding thereto, and each of the second connection lines is respectively electrically connected to the second viewing angle control electrode series corresponding thereto.

2. The touch display panel according to claim 1, wherein each of the viewing angle control electrode units comprises a plurality of first viewing angle control electrode series and a plurality of second viewing angle control electrodes series;

and

each of the first viewing angle control electrode series and each of the second viewing angle control electrode series are alternately arranged along the first direction.

3. The touch display panel according to claim 2, wherein each of the first viewing angle control electrode series comprises a plurality of first electrode parts, each of the second viewing angle control electrode series comprises a plurality of second electrode parts, and each of the first electrode parts and each of the second electrode parts are alternately arranged along the second direction.

4. The touch display panel according to claim 2, wherein the first viewing angle control electrode series are electrically connected to each other, and the second viewing angle control electrode series are electrically connected to each other.

5. The touch display panel according to claim 1, wherein each of the touch receiving electrode units comprises a first touch electrode series and a second touch electrode series, and the first touch electrode series and the second touch electrode series are provided in parallel along the second direction and are electrically connected to each other.

6. The touch display panel according to claim 1, wherein the viewing angle control electrode units are provided between the first connection lines and the second connection lines in the direction vertically projected on the first substrate.

7. The touch display panel according to claim 1, further comprising a driving circuit, which comprises a first sub driving circuit and a second sub driving circuit, wherein the first connection lines and the second connection lines are respectively electrically connected to the first driving unit and the second driving unit.

8. The touch display panel according to claim 7, wherein the first sub driving circuit provides a viewing angle control voltage signal, and the second sub driving circuit provides a touch signal.

9. A method for driving a touch display panel, comprising:

providing the touch display panel, wherein the touch display panel comprises;

a plurality of pixels, wherein each of the pixels comprises a pixel electrode and a common electrode, and at least one of the pixel electrode and the common electrode has a plurality of slits;

a plurality of viewing angle control electrode units, arranged in sequence along a first direction in a X axis, wherein each of the viewing angle control electrode units comprises a plurality of first viewing angle control electrode series and a plurality of second viewing angle control electrodes series, and each of the first viewing angle control electrode series and each of the second viewing angle control electrode series are alternately arranged along the first direction; and

a plurality of touch receiving electrode units, arranged in sequence along a second direction in a Y axis, and partially overlapping with the viewing angle control electrode units in a vertical projected direction in a Z axis, wherein the viewing angle control electrode units and the touch receiving electrode units form a touch unit; and

providing a touch signal to the first viewing angle control electrode series and the second viewing angle control electrode series of a Nth viewing angle control electrode unit in an Nth timing of a first image, wherein N is a positive integer;

terminating the touch signal to the Nth viewing angle control electrode unit in an (N+1)th timing of the first image;

providing a first viewing angle control voltage to the first viewing angle control electrode series and a second viewing angle control voltage to the second viewing angle control electrode series of the Nth viewing angle control electrode unit in the (N+1)th timing of the first image;

providing the touch signal to the first viewing angle control electrode series and the second viewing angle control electrode series of the Nth viewing angle control electrode unit in an Mth timing of a second image;

terminating the touch signal to the first viewing angle control electrode series of the Nth viewing angle control electrode unit in an (M+1)th timing of the second image; and

providing the second viewing angle control voltage to the first viewing angle control electrode series of the Nth viewing angle control electrode unit, and providing the first viewing angle control voltage to the second viewing angle control electrode series of the Nth viewing angle control electrode unit in the (M+1)th timing of the second image, wherein M is equal to N and is a positive integer.

10. The method according to claim 9, further comprising:

in the (N+1)th timing, providing a plurality of gate signals in sequence respectively to the pixels corresponding to the Nth viewing angle control electrode unit.

11. The method according to claim 9, wherein in a first display mode, the first viewing angle control voltage is equal to a pixel voltage provided to the pixel electrode when each of the pixels has a positive polarity and displays a maximum gray-scale value, and the second viewing angle control voltage is equal to a pixel voltage provided to the pixel electrode when each of the pixels has a negative polarity and displays a maximum gray-scale value.

12. The method according to claim 9, wherein in a second display mode, the first viewing angle control voltage and the second viewing angle control voltage are equal to a voltage provided to the common electrode of each of the pixels.