US-20260127909-A1 - DISPLAY DEVICE HAVING BIOMETRIC FUNCTION AND OPERATION METHOD THEREOF

Abstract

A display device includes a display panel configured to display an image. A biometric sensor module is disposed on the display panel. The biometric sensor module is configured to output a first transmission signal having a first frequency to sense fingerprint information in a fingerprint sensing mode. The biometric sensor is also configured to output a second transmission signal having a second frequency that is different from the first frequency to sense skin condition information in a skin measuring mode.

Inventors

• SooJung Lee
• Suk Kim
• Yuna Kim
• Keumdong JUNG
• Goeun CHA

Assignees

• SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date

20260507

Application Date

20251229

Priority Date

20191021

Claims (6)

1. 1 . A display device comprising: a display panel configured to display an image; and a biometric sensor module disposed on the display panel and configured to receive biometric information, wherein the biometric sensor module comprises: first detection sensors configured to transmit a first transmission signal having a first frequency to receive fingerprint information in a fingerprint sensing mode; and second detection sensors configured to transmit a second transmission signal having a second frequency that is different from the first frequency, to receive skin condition information in a skin measuring mode.
2. 2 . The display device of claim 1 , wherein: each of the first detection sensors and the second detection sensors is an ultrasonic sensor; and the first transmission signal and the second transmission signal are each an ultrasonic signal.
3. 3 . The display device of claim 1 , wherein the first detection sensors and the second detection sensors are alternately arranged.
4. 4 . The display device of claim 1 , wherein each of the second detection sensors has a larger size than a size of each of the first detection sensors.
5. 5 . The display device of claim 1 , wherein the first frequency of the first transmission signal is lower than the second frequency of the second transmission signal.
6. 6 . A display device comprising: a display panel configured to display an image; and a biometric sensor module disposed on the display panel; wherein the biometric sensor module is configured to: operate in a plurality of biometric sensor modes, each biometric sensor mode is configured to determine a different type of biometric information of a user than the other of the plurality of biometric sensor modes; output a transmission signal and receive a reflected transmission signal in each biometric sensor mode, the transmission signal in each biometric sensor mode having a predetermined frequency that is different from predetermined frequencies of transmission signals in each of the other of the plurality of biometric sensor modes; and generate receiving signals from the reflected transmission signal in each biometric sensor mode to determine the different types of biometric information in each of the plurality of biometric sensor modes.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a divisional of U.S. patent application Ser. No. 17/025,007 filed on Sep. 18, 2020, which claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2019-0130772, filed on Oct. 21, 2019 in the Korean Intellectual Property Office, the disclosures of which are incorporated by reference in their entireties herein. 1. TECHNICAL FIELD The present inventive concepts relate to a display device, and more particularly, to a display device capable of sensing biometric information of the user. 2. DISCUSSION OF RELATED ART Numerous multi-media devices include a display device for displaying an image, such as a television, a mobile phone, a tablet computer, a navigator, or a game player. The display device may be provided with an input sensing panel for receiving a touch-based input which enables a user to easily input information or a command intuitively and conveniently, without utilizing a button, a keyboard, or a mouse. Recently, display devices for multi-media devices have been developed which perform the biometric detection process of fingerprint recognition for user authentication means for online banking, product purchase, security, or the like. SUMMARY The present inventive concepts provides a display device capable of measuring skin elasticity using a biometric sensor for sensing a biometric fingerprint input. The present inventive concepts also provides an operation method of a display device capable of sensing a fingerprint and measuring the skin elasticity. In an exemplary embodiment of the present inventive concepts, a display device includes a display panel configured to display an image. A biometric sensor module is disposed on the display panel. The biometric sensor module is configured to output a first transmission signal having a first frequency to sense fingerprint information in a fingerprint sensing mode. The biometric sensor is also configured to output a second transmission signal having a second frequency that is different from the first frequency to sense skin condition information in a skin measuring mode. In an exemplary embodiment, the biometric sensor module may be an ultrasonic sensor module, and each of the first transmission signal and the second transmission signal may be an ultrasonic signal. In an exemplary embodiment, the display panel may include an image area in which an image is displayed, and a bezel area, and the biometric sensor module may transmit one of the first transmission signal and the second transmission signal to a sensing area corresponding to a part of the image area. In an exemplary embodiment, the biometric sensor module may include: a biometric sensor module including a plurality of detection sensors configured to output any one of the first transmission signal and the second transmission signal, and receive any one piece of the fingerprint information and the skin condition information; a selection circuit configured to control operations of the plurality of sensors; and an output circuit configured to output a receiving signal corresponding to any one piece of the fingerprint information and the skin condition information sensed by the plurality of detection sensors. In an exemplary embodiment, each of the plurality of detection sensors may transmit the first transmission signal having the first frequency in the fingerprint sensing mode, and transmit the second transmission signal having the second frequency in the skin measuring mode. In an exemplary embodiment, the output circuit may output a first receiving signal corresponding to the fingerprint information in the fingerprint sensing mode, and output a second receiving signal corresponding to the skin condition information in the skin measuring mode. In an exemplary embodiment, the plurality of detection sensors may include: first detection sensors configured to transmit the first transmission signal having the first frequency in the fingerprint sensing mode; and second detection sensors configured to transmit the second transmission signal having the second frequency in the skin measuring mode. In an exemplary embodiment, the first detection sensors and the second detection sensors may be alternately arranged in a prescribed direction. In an exemplary embodiment, each of the second detection sensors may have a larger size than each of the first detection sensors. In an exemplary embodiment, the number of the first detection sensors may be greater than that of the second detection sensors. In an exemplary embodiment, the first frequency of the first transmission signal may be lower than the second frequency of the second transmission signal. In an exemplary embodiment, the first frequency of the first transmission signal may be set to a prescribed frequency of a range of about 10 MHz to 20 MHz, and the second frequency of the second transmission signal may be set to a prescribed frequency of a range of about 10 kHz to 50 kHz. In an e