Abstract: The disclosure provides a touch recognition device, including a display device and manufacturing method thereof. The touch recognition device includes a substrate, a thin film transistor layer, a transparent conductive layer, a first metal layer, a piezoelectric material layer and a second metal layer. The transparent conductive layer is disposed on an end of the thin film transistor layer, and the transparent conductive layer includes a plurality of transparent electrodes. The first metal layer is adjacent to the plurality of transparent electrodes. The piezoelectric material layer is disposed on the transparent conductive layer and the first metal layer. The second metal layer is disposed on the piezoelectric material layer to achieve the effect of increasing voltage of signals and power of ultrasound.

Abstract: The present invention is a display device, comprising a display module, a fingerprint recognition module and a speaker module. The back of the display module is provided with a fingerprint recognition module and a speaker module. A common electrode layer is arranged between the fingerprint recognition module and the speaker module, so that the thickness of the display can be greatly reduced.

Abstract: A thin-profile ultrasonic sensor includes a piezoelectric material layer having a first surface and a second surface, a plurality of thin film transistors (TFTs) on the first surface, and an electrode layer on the second surface. The first surface and the second surface are on opposite sides facing away from each other. The piezoelectric material layer is configured as a substrate to support the plurality of TFTs, no other substrate being required. The piezoelectric material layer is configured to transmit and receive ultrasonic signals.

Abstract: Panel structure includes a substrate, a piezoelectric material layer and a thin film transistor. The piezoelectric material layer is disposed under the substrate, in which the piezoelectric material layer is configured to generate human recognizable sound waves by vibrating at a human audible frequency in a first time interval, and the piezoelectric material layer is configured to generate ultrasonic waves by vibrating at an ultrasonic frequency in a second time interval. The piezoelectric material layer is used for recognizing human fingerprints when it vibrates at the ultrasonic frequency. The thin film transistor is positioned under and electrically connected to the piezoelectric material layer.

Abstract: A fingerprint identification device includes a substrate, a piezoelectric layer, a conductive layer, and a planar layer. The piezoelectric layer is disposed on the substrate. The conductive layer is disposed on the piezoelectric layer, and the conductive layer has a rugged microstructure on an upper surface of the conductive layer. The planar layer is disposed on the conductive layer, and a bottom of the planar layer fills the rugged microstructure of the conductive layer.

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.