Touch panel with electromagnetic induction

Patent metadata

Field	Value
Publication number	US-10860149-B2
Application number	US-201916426704-A
Country	US
Kind code	B2
Filing date	May 30, 2019
Priority date	Apr 26, 2019
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

A touch panel with electromagnetic induction function comprising a light-emitting diode backlight layer, an electromagnetic antenna, a display panel layer, a touch panel layer and a protective layer. The light emitting diode backlight layer has a plurality of light emitting diode units. The electromagnetic antenna is disposed on the backlight layer for emitting an alternating electromagnetic field and receiving a resonance signal. The display panel layer is disposed on the backlight layer. The touch panel layer is disposed on the display panel layer for capacitive touch. The protective layer is disposed on the touch panel layer to protect the touch panel layer. An electromagnetic pen for electromagnetic touch is configured to receive the alternating electromagnetic field and then emit the resonance signal.

First claim

What is claimed is:

1. A touch panel with electromagnetic induction function, comprising:
a light emitting diode backlight layer comprising a plurality of light emitting diode units;
an electromagnetic antenna disposed on the light emitting diode backlight layer for emitting an alternating electromagnetic field and receiving a resonance signal;
a display panel layer disposed on the light emitting diode backlight layer;
a touch panel layer disposed on the display panel layer for capacitive touch;
a protective layer disposed on the touch panel layer for protecting the touch panel layer from an electromagnetic pen configured to receive the electromagnetic field and then emit the resonance signal,
wherein the electromagnetic antenna is disposed between the plurality of light emitting diode units, and the plurality of light emitting diode units have a distance between the units, and the electromagnetic antenna has a line width with a width less than the distance between the plurality of light emitting diode units.

2. The touch panel with electromagnetic induction function of claim 1 , wherein the plurality of light emitting diode units are arranged on the light emitting diode backlight layer in an array.

3. The touch panel with electromagnetic induction function of claim 1 , wherein the plurality of light emitting diode units comprises 1 mm light-emitting diode units.

4. The touch panel with electromagnetic induction function of claim 1 , wherein the electromagnetic antenna is disposed on an outer surface of the light emitting diode backlight layer.

5. The touch panel with electromagnetic induction function of claim 1 , wherein the electromagnetic antenna is disposed inside the light emitting diode backlight layer.

6. The touch panel with electromagnetic induction function of claim 1 , wherein the plurality of light emitting diode units are driven by DC power.

7. The touch panel with electromagnetic induction function of claim 1 , wherein the display panel layer comprises a liquid crystal display panel.

8. A touch panel with electromagnetic induction function, comprising:
a light emitting diode backlight layer comprising a plurality of light emitting diode units;
an electromagnetic antenna disposed on the light emitting diode backlight layer for emitting an alternating electromagnetic field and receiving a resonance signal;
a display panel layer disposed on the light emitting diode backlight layer such that the electromagnetic antenna and the display panel layer are disposed on the same side of the light emitting diode backlight layer;
a touch panel layer disposed on the display panel layer for capacitive touch;
a protective layer disposed on the touch panel layer for protecting the touch panel layer from an electromagnetic pen configured to receive the electromagnetic field and then emit the resonance signal;
wherein the electromagnetic antenna is disposed between the plurality of light emitting diode units, and the plurality of light emitting diode units have a distance between the units, and the electromagnetic antenna has a line width with a width less than the distance between the plurality of light emitting diode units.

9. The touch panel with electromagnetic induction function of claim 8 , wherein the plurality of light emitting diode units are arranged on the light emitting diode backlight layer in an array.

10. The touch panel with electromagnetic induction function of claim 8 , wherein the plurality of light emitting diode units comprises 1 mm light-emitting diode units.

11. The touch panel with electromagnetic induction function of claim 8 , wherein the plurality of light emitting diode units are driven by DC power.

12. The touch panel with electromagnetic induction function of claim 8 , wherein the display panel layer comprises a liquid crystal display panel.

Assignees

• Interface Tech Chengdu Co Ltd
• Interface Optoelectronics Shenzhen Co Ltd
• General Interface Solution Ltd

Inventors

• Lin bo-rong
• Lee Hsuan-Yun
• Li Ching-Lin

Classifications

• G06F2203/04106

  Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection · CPC title

• G06F3/046

  by electromagnetic means · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G02F1/133612

  Electrical details · CPC title

• G02F1/133603

  with LEDs · CPC title