Touch screen and electronic device having the same
AssigneeNanchang O-Film Bio-Identification Technology Co., Ltd.
InventorZhen Chen
Life of this patent
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Abstract
A touch screen includes a touch panel and an ultrasonic probe. A touch panel includes a cover plate, a first sensing structure including a plurality of receiving electrode lines, a glass sheet, and a second sensing structure including a plurality of transmitting electrode lines. The ultrasonic probe includes a first piezoelectric film and a second piezoelectric film. The first piezoelectric film is attached to the touch panel and electrically coupled to the receiving electrode line, and the second piezoelectric film is attached to the touch panel and electrically coupled to the transmitting electrode line. An electronic device is also provided.
Claims20
A touch screen for fingerprint identification, comprising:
- a touch panel comprising:
- a cover plate;
- a first sensing structure disposed on the cover plate and comprising a receiving electrode line;
- a glass sheet disposed on the first sensing structure;
- and
- a second sensing structure disposed on the glass sheet and comprising a transmitting electrode line;
- and
- an ultrasonic probe comprising:
- a first piezoelectric film attached to the touch panel and electrically coupled to the receiving electrode line;
- and
- a second piezoelectric film attached to the touch panel and electrically coupled to the transmitting electrode line,
- wherein, upon the touch of a user's finger, each of the first piezoelectric film and the second piezoelectric film is configured to generate a first piezoelectric signals that are integrated into a second piezoelectric signal;
- wherein the second piezoelectric signal is converted into a piezoelectric pulse signal that are transmitted to the first piezoelectric film;
- wherein the first piezoelectric film is configured to vibrate and generate ultrasonic to the second piezoelectric film according to the piezoelectric pulse signal;
- and
- wherein each of the first piezoelectric film and the second piezoelectric film is configured to send a first fingerprint electrical signal that are integrated into a second fingerprint electrical signal.
An electronic device, comprising:
- a main body;
- and
- a touch screen mounted on the main body, the touch screen comprising;
- a cover plate;
- a first sensing structure disposed on the cover plate and comprising a receiving electrode line;
- a glass sheet disposed on the first sensing structure;
- and
- a second sensing structure disposed on the glass sheet and comprising a transmitting electrode line;
- and
- an ultrasonic probe comprising:
- a first piezoelectric film attached to the touch panel and electrically coupled to the receiving electrode line;
- and
- a second piezoelectric film attached to the touch panel and electrically coupled to the transmitting electrode line,
- wherein, upon the touch of a user's finger, each of the first piezoelectric film and the second piezoelectric film is configured to generate a first piezoelectric signals that are integrated into a second piezoelectric signal;
- wherein the second piezoelectric signal is converted into a piezoelectric pulse signal that are transmitted to the first piezoelectric film;
- wherein the first piezoelectric film is configured to vibrate and generate ultrasonic to the second piezoelectric film according to the piezoelectric pulse signal;
- and
- wherein each of the first piezoelectric film and the second piezoelectric film is configured to send a first fingerprint electrical signal that are integrated into a second fingerprint electrical signal.
Dependencies are inferred from the claim text.