TOUCH DISPLAY DEVICE AND DRIVING METHOD THEREOF

• US 20160019855A1
• Filed: 07/16/2015
• Published: 01/21/2016
• Est. Priority Date: 07/21/2014
• Status: Abandoned Application

• Current Assignee: MStar Semiconductor Incorporated (MediaTek, Inc.)
• Original Assignee: MStar Semiconductor Incorporated (MediaTek, Inc.)
• Inventors: Liu, Chi Kang
• Application Number:
  US14/801,216
• Publication Number:
  US 20160019855A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 2203/04101 2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
• CPC Class Codes: G09G 2300/0408 Integration of the drivers onto the display substrate
• CPC Class Codes: G09G 2300/043 Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver
• CPC Class Codes: G09G 2310/0202 Addressing of scan or signal lines
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A touch display device includes a display panel and a transparent conductive pattern layer. The display panel has a display side and a back side opposite to each other, and includes a plurality of data lines extending along a first direction. The data lines transmit a plurality of touch signals and display signals. The transparent conductive pattern layer is disposed on the display side, and includes a plurality of sensing electrodes extending along a second direction. The sensing electrodes intersect and are electrically insulated from the data lines to form a touch sensing element.

Claims

1. A touch display device, comprising:

a display panel, having a display side and back side opposite to each other, comprising a plurality of data lines extending along a first direction, the data lines configured to transmit a plurality of touch signals and display signals; and

a transparent conductive pattern layer, disposed on the display side, comprising a plurality of sensing electrodes extending along a second direction, the sensing electrodes intersecting and being electrically insulated from the data lines to form a touch sensing element.

2. The touch display device according to claim 1, wherein the display panel further comprises:

a first substrate, having a first inner side and the display side opposite to each other;

a second substrate, disposed opposite the first substrate, having a second inner surface and the back side opposite to each other; and

a liquid crystal layer, disposed between the first inner surface of the first substrate and the second inner surface of the second substrate;

wherein, the data lines are disposed between the first inner surface and the liquid crystal layer.

3. The touch display device according to claim 2, wherein the display panel further comprises:

a plurality of gate lines, disposed between the liquid crystal layer and the first inner surface, interesting and being insulated from the data lines;

a plurality of thin-film transistors (TFTs), disposed between the liquid crystal layer and the first inner surface, each of the TFTs comprising a gate, a source and a drain, each of the gates electrically connecting to one of the corresponding gate lines, each of the sources electrically connecting to one of the corresponding data lines;

a plurality of pixel electrodes, disposed between the liquid crystal layer and the first inner surface, electrically connecting to the drains;

a black matrix layer, disposed between the liquid crystal layer and the second inner surface;

a color filter layer, disposed between the liquid crystal layer and the second inner surface; and

a common electrode layer, disposed between the liquid crystal layer and the color filter layer.

4. The touch display device according to claim 2, wherein the display panel further comprises:

a plurality of gate lines, disposed between the liquid crystal layer and the first inner surface, intersecting and being insulated from the data lines;

a plurality TFTs, disposed between the liquid crystal layer and the first inner surface, each of the TFTs comprising a gate, a source and a drain, each of the gates electrically connecting to one of the corresponding gate lines, each of the sources electrically connecting to one of the corresponding data lines;

a plurality of pixel electrode patterns, disposed between the liquid crystal layer and the first inner surface, electrically connecting to the drains;

a common electrode pattern, disposed between the liquid crystal layer and the first inner surface;

a black matrix layer, disposed between the liquid crystal layer and the second inner surface; and

a color filter layer, disposed between the liquid crystal layer and the second inner surface.

5. The touch display device according to claim 1, wherein the display panel further comprises:

a first substrate, having a first inner side and the back side opposite to each other;

a second substrate, disposed opposite to the first substrate, having a second inner surface and the display side; and

a liquid crystal layer, disposed between the first inner surface of the first substrate and the second inner surface of the second substrate;

wherein, the data lines are disposed between the first inner surface and the liquid crystal layer.

6. The touch display device according to claim 5, wherein the display panel further comprises:

a plurality of gate lines, disposed between the liquid crystal layer and the first inner surface, interesting and being insulated from the data lines;

a plurality of TFTs, disposed between the liquid crystal layer and the first inner surface, each of the TFTs comprising a gate, a semiconductor island, a source and a drain, each of the gates electrically connecting to one of the corresponding gate lines, each of the sources electrically connecting to one of the corresponding data lines;

a plurality of pixel electrode patterns, disposed between the liquid crystal layer and the first inner surface, electrically connecting to the drains;

a common electrode pattern, disposed between the liquid crystal layer and the first inner surface;

a black matrix layer, disposed between the liquid crystal layer and the second inner surface; and

a color filter layer, disposed between the liquid crystal layer and the second inner surface.

7. The touch display device according to claim 6, wherein the gates are disposed between the sources and the liquid crystal layer and between the drains and the liquid crystal layer, and the display panel further comprises a light shielding layer disposed between the semiconductor islands and the first inner surface.

8. The touch display device according to claim 1, wherein each of the sensing electrodes has a comb-like pattern and comprises a plurality of strip-like electrodes and a connecting electrode, the strip-like electrodes extend along the second direction, and the connecting electrode connects end points of the strip-like electrodes.

9. The touch display device according to claim 1, wherein the data lines and the sensing electrodes electrically connect to a control element, and the control element provides the touch signals and the display signals.

10. The touch display device according to claim 1, further comprising a backlight module disposed facing the back side.

11. The touch display device according to claim 1, further comprising a first polarization film and a second polarization film respectively disposed on the display side and the back side, wherein the transparent conductive pattern layer is disposed between the first polarization film and the display panel.

12. A driving method of a touch display device, the touch display device comprising a display panel and a transparent conductive pattern layer disposed on a display side of the display panel, the display panel comprising a plurality of data lines extending along a first direction, the transparent conductive pattern layer comprising a plurality of sensing electrodes extending along a second direction, the sensing electrodes intersecting and being electrically insulated from the data lines;

the driving method comprising;

in a display period, transmitting a display signal to at least one of the data lines; and

in a touch control period, transmitting a touch signal to at least one of the data lines, and receiving a sensing signal from at least one of the sensing electrodes corresponding to the data lines.

13. The driving method according to claim 12, wherein the display panel further comprises a plurality of gate lines;

and the gate lines intersect and are electrically insulated from the data lines, and transmit a gate signal to at least one of the gate lines in the display period.

14. The driving method according to claim 12, wherein display period does not overlap with the touch control period.