# US 10,503,949 B2 · Touch screen and electronic device having the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,503,949 B2 - Document ID: US10503949B2 - Status: Granted - Kind: B2 - Application number: 15/785,240 - Filed: 2017-10-16 - Published: 2018-07-05 - Granted: 2019-12-10 - Earliest claimed: 2016-12-30 - Assignees: Nanchang O-Film Bio-Identification Technology Co., Ltd. - Applicants: Nanchang O-Film Bio-Identification Technology Co., Ltd. - Inventors: Zhen Chen - Web page: https://patentgrep.com/patent/US10503949B2 ## CPC - G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer} - G06F 3/043: using propagating acoustic waves - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06V 40/1306: {non-optical, e.g. ultrasonic or capacitive sensing} - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## 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. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The touch screen of claim 1, wherein the first sensing structure comprises a first carrier made of glass, the receiving electrode line is arranged on the first carrier, the second sensing structure comprising a second carrier made of glass, the transmitting electrode line is arranged on the second carrier; the touch screen is a double indium tin oxides (DITO) type touch screen. ### Claim 3 (depends on 1) The touch screen of claim 1, further comprising a liquid optically clear adhesive (OCA) sandwiched between the cover plate and the first piezoelectric film. ### Claim 4 (depends on 1) The touch screen of claim 1, wherein the first piezoelectric film is positioned on a side of the first sensing structure adjacent to the cover plate, and the second piezoelectric film is positioned on a side of the second sensing structure adjacent to the cover plate. ### Claim 5 (depends on 1) The touch screen of claim 1, wherein the first piezoelectric film is positioned on a side of the first sensing structure adjacent to the cover plate; the second piezoelectric film is positioned on a side of the second sensing structure away from the cover plate. ### Claim 6 (depends on 1) The touch screen of claim 1, wherein the first piezoelectric film is positioned on a side of the first sensing structure away from the cover plate; the second piezoelectric film is positioned on a side of the second sensing structure adjacent to the cover plate. ### Claim 7 (depends on 1) The touch screen of claim 1, wherein the first piezoelectric film is positioned on a side of the first sensing structure away from the cover plate; the second piezoelectric film is positioned on a side of the second sensing structure away from the cover plate. ### Claim 8 (depends on 1) The touch screen of claim 1, wherein the first piezoelectric film and the second piezoelectric film are made of polyvinylidene fluoride. ### Claim 9 (depends on 1) The touch screen of claim 1, wherein orthographic projections of the receiving electrode line and the transmitting electrode line on the cover plate are orthogonal. ### Claim 10 (depends on 1) The touch screen of claim 1, wherein orthographic projections of the receiving electrode line and the transmitting electrode line on the cover plate are heterotropic. ### Claim 11 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. ### Claim 12 (depends on 11) The electronic device of claim 11, further comprising: a first circuit mounted in the main body; and a processing chip mounted on the first circuit; wherein the first circuit is electrically coupled to the first piezoelectric film and the second piezoelectric film. ### Claim 13 (depends on 12) The electronic device of claim 12, further comprising: a second circuit mounted in the main body; a processor mounted on the second circuit; wherein the second circuit is electrically coupled to the receiving electrode line and the transmitting electrode line; the second circuit is configured to convert the second piezoelectric signal into a piezoelectric pulse signal and send the piezoelectric pulse signal to the receiving electrode line and the transmitting electrode line; the second circuit is configured to send the second fingerprint electric signal to the processor; and the processor is configured to process and convert the second fingerprint electric signal into a data signal. ### Claim 14 (depends on 11) The electronic device of claim 11, wherein the first sensing structure comprises a first carrier made of glass, the receiving electrode line is arranged on the first carrier, the second sensing structure comprising a second carrier made of glass, the transmitting electrode line is arranged on the second carrier; the touch screen is a DITO type touch screen. ### Claim 15 (depends on 11) The electronic device of claim 11, wherein the touch screen further comprises a first liquid OCA sandwiched between the cover plate and the first piezoelectric film. ### Claim 16 (depends on 11) The electronic device of claim 11, wherein the first piezoelectric film is positioned on a side of the first sensing structure adjacent to the cover plate, and the second piezoelectric film is positioned on a side of the second sensing structure adjacent to the cover plate. ### Claim 17 (depends on 11) The electronic device of claim 11, wherein the first piezoelectric film is positioned on a side of the first sensing structure adjacent to the cover plate; the second piezoelectric film is positioned on a side of the second sensing structure away from the cover plate. ### Claim 18 (depends on 11) The electronic device of claim 11, wherein the first piezoelectric film is positioned on a side of the first sensing structure away from the cover plate; the second piezoelectric film is positioned on a side of the second sensing structure adjacent to the cover plate. ### Claim 19 (depends on 11) The electronic device of claim 11, wherein the first piezoelectric film is positioned on a side of the first sensing structure away from the cover plate; the second piezoelectric film is positioned on a side of the second sensing structure away from the cover plate. ### Claim 20 (depends on 11) The electronic device of claim 11, wherein the first piezoelectric film and the second piezoelectric film are made of polyvinylidene fluoride.