Plug-in touch display device and an electronic device

• US 10,185,423 B2
• Filed: 05/26/2016
• Issued: 01/22/2019
• Est. Priority Date: 05/04/2016
• Status: Active Grant

• Current Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Cao, Chang, Tsai, Yu-cheng, Ma, Changwen, Zhang, Zhou
• Primary Examiner(s): Nguyen, Kevin M
• Application Number:
  US15/117,521
• Publication Number:
  US 20180113542A1
• Time in Patent Office: 971 Days
• CPC Class Codes: G02F 1/133302 Rigid substrates, e.g. inorganic substrates
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133317 Intermediate frames, e.g. between backlight housing and front frame
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 2201/121 common or background
• CPC Class Codes: G02F 2201/123 pixel
• 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 3/0412 Digitisers structurally integrated in a display
• 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

Abstract

A plug-in touch display device includes a capacitive touch screen stacked on a display module. The display module includes a display panel and a backlight module that are supported in a middle frame. The display panel includes an array substrate that includes a pixel electrode, which also serves as a first capacitive sensing electrode. The middle frame has one side facing the backlight module and receiving a second capacitive sensing electrode arranged therein. A gap exists between the second capacitive sensing electrode and backlight module. The first capacitive sensing electrode and the second capacitive sensing electrode configure an electrode-induction device jointly, for sensing a pressure signal applied on the capacitive touch screen. In a display time period of one frame, the pixel electrode transmits pixel voltage signals and pressure sensing signals alternately.

Claims

1. A plug-in touch display device comprising a capacitive touch screen and a display module which are stacked together;

the capacitive touch screen being used for sensing a touch signal;

the display module comprising a display panel and a backlight module arranged relatively and a middle frame supporting the display panel and the backlight module;

the display panel comprising an array substrate;

the array substrate comprising a pixel electrode layer which is arranged to serve as a pixel electrode;

wherein the pixel electrode layer also serves as a first capacitive sensing electrode;

the middle frame having one side facing the backlight module and receiving a second capacitive sensing electrode arranged therein;

a gap provided between the second capacitive sensing electrode and the backlight module;

the first capacitive sensing electrode and the second capacitive sensing electrode configuring an electrode-induction device jointly, which is operable to sense a pressure signal applied on the capacitive touch screen;

wherein in a display time period of one frame, the pixel electrode layer is operated to alternately transmit pixel voltage signals and pressure sensing signals; and

wherein the capacitive touch screen is stacked on a top side of the display module and the electrode-induction device that comprises the first and second capacitive sensing electrodes is arranged on an underside of the display module and is spaced from the capacitive touch screen.

2. The plug-in touch display device as recited in claim 1, wherein a material of the second capacitive sensing electrode is ITO (indium tin oxide).

3. The plug-in touch display device as recited in claim 1, wherein the capacitive touch screen comprises a touch sensing driving electrode and a touch induction electrode arranged on different layers;

the touch sensing driving electrode and the touch induction electrode being used for sensing the touch signal applied on the capacitive touch screen.

4. The plug-in touch display device as recited in claim 1, wherein the capacitive touch screen is connected to a touch driver chip and the electrode-induction device is connected to a pressure sensor driver chip.

5. The plug-in touch display device as recited in claim 4, wherein the touch driver chip and the pressure sensor driver chip are integrated in the same control chip.

6. The plug-in touch display device as recited in claim 1, wherein the display panel further comprises a filter substrate;

the filter substrate and the array substrate being arranged corresponding to each other;

a liquid crystal layer being arranged between the array substrate and the filter substrate.

7. The plug-in touch display device as recited in claim 6, wherein the array substrate comprises a first glass substrate;

the pixel electrode layer and a common electrode layer being arranged sequentially on one side of the liquid crystal layer near the first glass substrate;

the pixel electrode layer and the common electrode layer being insulated from each other.

8. An electronic device comprises a housing and a touch display device installed in the housing;

wherein the plug-in touch display device comprises a capacitive touch screen and a display module which are stacked together;

the capacitive touch screen being used for sensing a touch signal;

the display module comprising a display panel and a backlight module arranged relatively and a middle frame supporting the display panel and the backlight module;

the display panel comprising an array substrate;

the array substrate comprising a pixel electrode layer which is arranged to serve as a pixel electrode;

wherein the pixel electrode layer also serves as a first capacitive sensing electrode;

the middle frame having one side facing the backlight module and receiving a second capacitive sensing electrode arranged therein;

a gap provided between the second capacitive sensing electrode and the backlight module;

the first capacitive sensing electrode and the second capacitive sensing electrode configuring an electrode-induction device jointly, which is operable to sense a pressure signal applied on the capacitive touch screen;

wherein in a display time period of one frame, the pixel electrode layer is operated to alternately transmit pixel voltage signals and pressure sensing signals; and

wherein the capacitive touch screen is stacked on a top side of the display module and the electrode-induction device that comprises the first and second capacitive sensing electrodes is arranged on an underside of the display module and is spaced from the capacitive touch screen.

9. The electronic device as recited in claim 8, wherein a material of the second capacitive sensing electrode is ITO (indium tin oxide).

10. The electronic device as recited in claim 8, wherein the capacitive touch screen comprises a touch sensing driving electrode and a touch induction electrode arranged on different layers;

the touch sensing driving electrode and the touch induction electrode being used for sensing the touch signal applied on the capacitive touch screen.

11. The electronic device as recited in claim 8, wherein the capacitive touch screen is connected to a touch driver chip and the electrode-induction device is connected to a pressure sensor driver chip.

12. The electronic device as recited in claim 11, wherein the touch driver chip and the pressure sensor driver chip are integrated in the same control chip.

13. The electronic device as recited in claim 8, wherein the display panel further comprises a filter substrate;

the filter substrate and the array substrate being arranged corresponding to each other;

a liquid crystal layer being arranged between the array substrate and the filter substrate.

14. The electronic device as recited in claim 13, wherein the array substrate comprises a first glass substrate;

the pixel electrode layer and a common electrode layer being arranged sequentially on one side of the liquid crystal layer near the first glass substrate;

the pixel electrode layer and the common electrode layer being insulated from each other.