Sensing screen, control circuit and control method thereof, and sensing screen apparatus

Patent metadata

Field	Value
Publication number	US-10530040-B2
Application number	US-201615374072-A
Country	US
Kind code	B2
Filing date	Dec 9, 2016
Priority date	Jun 11, 2014
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

The present application discloses a sensing screen, a control circuit and control method thereof, and a sensing screen apparatus. The sensing screen includes a display screen, a first transparent medium layer, a transparent connection layer, and an antenna layer. The antenna layer includes multiple antenna units, and the antenna units include at least one first antenna unit and multiple second antenna units. The first antenna unit is configured to transmit a sensing signal, the second antenna units are configured to receive reflected signals of the sensing signal, and the reflected signals are generated by a touch object by reflecting the sensing signal. According to the present application, the antenna layer is arranged right above the display screen, so that a touch area of the sensing screen is fully utilized while screen display is not affected, so as to substantially increase an antenna size and increase an antenna gain.

First claim

What is claimed is:

1. A sensing screen, comprising:
a display screen;
a first transparent medium layer;
a second transparent medium layer;
a connection layer, wherein the connection layer is transparent; and
an antenna layer, wherein the antenna layer is transparent;
wherein the first transparent medium layer is sandwiched between the connection layer and the antenna layer, the connection layer is sandwiched between the first transparent medium layer and the second transparent medium layer, and the second transparent medium layer is sandwiched between the connection layer and the display screen, wherein the antenna layer, the first transparent medium layer, the connection layer, and the second transparent medium layer are all arranged right above the display screen,
wherein the antenna layer comprises multiple antenna units each having an antenna, and the multiple antenna units comprise at least one first antenna unit and multiple second antenna units, wherein the multiple second antenna units are interspersed with the first antenna unit,
wherein the at least one first antenna unit is configured to transmit a sensing signal in a sensing timeslot and the multiple second antenna units are configured to receive reflected signals of the sensing signal that are generated by a touch object by reflecting the sensing signal in the sensing timeslot, wherein the sensing timeslot is used to complete a sensing operation,
wherein the at least one first antenna unit and the multiple second antenna units are configured to simultaneously transmit a first communication signal in a communication timeslot and the at least one first antenna unit and the multiple second antenna units are configured to simultaneously receive a second communication signal in the communication timeslot, wherein the communication timeslot is used to complete a non-contact sensing operation,
wherein one or more sensing timeslots are inserted in one communication timeslot in a spaced manner or are inserted between two adjacent communication timeslots in a spaced manner, and the at least one first antenna unit is selected from among the multiple antenna units to transmit the sensing signal in at least one of the one or more sensing timeslots based on one of a highest frequency of use and a power of reflected signals received by the multiple second antenna units, and
wherein the second transparent medium layer comprises transparent glass or air.

2. The sensing screen according to claim 1 , wherein the antenna layer comprises multiple antenna feeders configured to feed the multiple antenna units, wherein each antenna feeder is respectively connected to a different antenna.

3. The sensing screen according to claim 1 , wherein a radiation direction of a first antenna array formed by a first set of antenna units is parallel with the display screen, and a radiation direction of a second antenna array formed by a second set of antenna units is perpendicular to the display screen.

4. The sensing screen according to claim 3 , wherein the antennas are made of one or more of indium tin oxide, fluorine-doped tin oxide, aluminum-doped zinc oxide, and indium-doped zinc oxide.

5. The sensing screen according to claim 3 , wherein the antennas are low-profile antennas, and the low-profile antennas comprise one or more of a patch antenna, a slot antenna, and a Vivaldi antenna.

6. The sensing screen according to claim 1 , wherein the connection layer comprises a shield layer and a ground layer, wherein
the shield layer is configured to shield the antenna layer and return the first communication signal, the sensing signal, and the reflected signals, and
the ground layer is configured to ground the antenna layer.

7. The sensing screen according to claim 1 , wherein the sensing screen further comprises
a transparent protective layer that overlies the antenna layer, and the transparent protective layer and the first transparent medium layer are located on two sides of the antenna layer.

8. The sensing screen according to claim 1 , wherein the antenna layer comprises multiple antenna feeders configured to feed the multiple antenna units, wherein each antenna feeder is connected to multiple antennas.

9. A control apparatus configured to control a sensing screen, the control apparatus comprising:
an adjustment circuit; and
a control circuit;
wherein the sensing screen comprises a display screen, a first transparent medium layer, a second transparent medium layer, a connection layer, and an antenna layer;
wherein both the connection layer and the antenna layer are transparent;
wherein the first transparent medium layer is sandwiched between the connection layer and the antenna layer, the connection layer is sandwiched between the first transparent medium layer and the second transparent medium layer, and the second transparent medium layer is sandwiched between the connection layer and the display screen, wherein the antenna layer, the first transparent medium layer, the connection layer, and the second transparent medium layer are all arranged right above the display screen;
wherein the antenna layer comprises multiple antenna units each having an antenna, and the multiple antenna units comprise at least one first antenna unit and multiple second antenna units, wherein the multiple second antenna units are interspersed with the first antenna unit;
wherein the at least one first antenna unit is configured to transmit a sensing signal in a sensing timeslot and the multiple second antenna units are confiqured to receive reflected signals of the sensing signal that are generated by a touch object by reflecting the sensing signal in the sensing timeslot, wherein the sensing timeslot is used to complete a sensing operation;
wherein the at least one first antenna unit and the multiple second antenna units are configured to simultaneously transmit a first communication signal in a communication timeslot and the at least one first antenna unit and the multiple second antenna units are configured to simultaneously receive a second communication signal in the communication timeslot, wherein the communication timeslot is used to complete a non-contact sensing operation,
wherein one or more sensing timeslots are inserted in one communication timeslot in a spaced manner or are inserted between two adjacent communication timeslots in a spaced manner, and the at least one first antenna unit is selected from among the multiple antenna units to transmit the sensing signal in at least one of the one or more sensing timeslots based on one of a highest frequency of use and a power of reflected signals received by the multiple second antenna units;
wherein the second transparent medium layer comprises transparent glass or air;
wherein the adjustment circuit is controlled by the control circuit to adjust the sensing signal, the reflected signals, and the first communication signal;
wherein the control circuit is further configured to determine a location of a touch object according to the adjusted sensing signal and reflected signals; and
wherein the adjustment circuit is electrically connected to the sensing screen and the control circuit separately.

10. The control apparatus according to claim 9 , wherein the adjustment circuit comprises:
a radio frequency front-end channel, configured to receive the sensing signal, the reflected signals, and the first communication signal, and perform standing-wave detection, signal amplification, and filtering on the sensing signal, the reflected signals, and the first communication signal;
an adjustment unit, configured to adjust amplitude, a phase, or a delay of the sensing signal, the reflected signals, and the first communication signal;

Assignees

• Huawei Tech Co Ltd

Inventors

• Cai Hua
• Cao Chang
• Chen Jingtao

Classifications

• H01Q1/22 Primary

  by structural association with other equipment or articles · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F2203/04107

  Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds · CPC title

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• H01Q3/24

  varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching · CPC title