Touch display module and electronic device using same
AssigneesInterface Technology (ChengDu) Co., Ltd., Interface Optoelectronics (Shenzhen) Co., Ltd., General Interface Solution Limited
InventorsYU-PI KUO, SIN-CHENG LIN, CHUNG-WU LIU, CHUN-TE CHANG, WAN-HENG LIN
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Abstract
A touch display module utilizing touch recognition by ultrasound includes display unit on substrate, barrier layer on other side of the substrate, and an ultrasound fingerprint sensing unit on the barrier layer. An acoustic impedance of the display unit, the barrier layer, and the ultrasonic fingerprint sensing unit are not all the same, and the differences in impedances enable recognition of touches by analysis of reflected ultrasound. The disclosure also provides an electronic device using the touch display module.
Claims18
A touch display module, comprising:
- a display unit;
- a barrier layer, the barrier layer being adhered to a surface of the display unit;
- and
- an ultrasonic fingerprint sensing unit, the ultrasonic fingerprint sensing unit being adhered to a surface of the barrier layer away from the display unit;
- wherein each of the display unit, the barrier layer, and the ultrasonic fingerprint sensing unit has a different acoustic impedance, and a value of the acoustic impedance of the barrier layer is between a value of the acoustic impedance of the display unit and a value of the acoustic impedance of the ultrasonic fingerprint sensing unit.
An electronic device, comprising a main body and a touch display module in the main body, the touch display module, comprising:
- a display unit;
- a barrier layer, the barrier layer being adhered to a surface of the display unit;
- and
- an ultrasonic fingerprint sensing unit, the ultrasonic fingerprint sensing unit being adhered to a surface of the barrier layer away from the display unit;
- wherein each of the display unit, the barrier layer, and the ultrasonic fingerprint sensing unit has a different acoustic impedance, and a value of the acoustic impedance of the barrier layer is between a value of the acoustic impedance of the display unit and a value of the acoustic impedance of the ultrasonic fingerprint sensing unit.
Dependencies are inferred from the claim text.