Abstract: A wireless power transmitter can include a wireless power transfer coil designed to magnetically couple with a corresponding coil in a wireless power receiver to facilitate wireless power transfer from the wireless power transmitter to the wireless power receiver, a power converter configured to drive the wireless power transfer coil, and control and communications circuitry coupled to the wireless power transfer coil and the power converter. The control and communications circuitry can be configured to operate the power converter to drive the wireless power transfer coil so as to transfer power to the wireless power receiver in accordance with a negotiated power transfer. Simultaneously during power transfer, the control and communications circuitry can send a polling signal to detect a foreign object including a wireless transponder and reduce or stop wireless power transfer upon receiving a response to the polling signal from a foreign object including a wireless transponder.

Abstract: A semi-transparent semi-retroreflective film and an air display device are provided. The air display device includes: a first polarizer and a second polarizer assembled with each other to form a cell; a semi-transparent semi-reflective structure and a semi-transparent semi-retroreflective film disposed between the first polarizer and the second polarizer; a first ¼ wave plate disposed at a side of the air display device adjacent to the first polarizer; and a second ¼ wave plate disposed between the semi-transparent semi-reflective structure and the semi-transparent semi-retroreflective film. The air display device is configured such that polarized light incident from the first polarizer, after being processed by an internal optical path of the air display device, exits from the second polarizer to form an air image at a side of the air display device away from the first polarizer.

Abstract: A display panel and deformation sensing method thereof, and a display device are provided. The display panel includes a substrate, and a deformation sensing unit on the substrate; the deformation sensing unit includes a first electrode, a second electrode, and a third electrode, the second electrode and the third electrode being configured to form a first capacitor, the first electrode and the second electrode being configured to form a second capacitor, the first electrode and the third electrode being configured to form a third capacitor, and the first capacitor, the second capacitor, and the third capacitor being configured to determine a shape-state of the display panel.

Abstract: A display panel and deformation sensing method thereof, and a display device are provided. The display panel includes a substrate, and a deformation sensing unit on the substrate; the deformation sensing unit includes a first electrode, a second electrode, and a third electrode, the second electrode and the third electrode being configured to form a first capacitor, the first electrode and the second electrode being configured to form a second capacitor, the first electrode and the third electrode being configured to form a third capacitor, and the first capacitor, the second capacitor, and the third capacitor being configured to determine a shape-state of the display panel.

Abstract: The present disclosure relates to display technology field, particularly to a compensation sub-pixel unit, a method of fabricating the compensation sub-pixel unit, a method of driving the compensation sub-pixel unit, a pixel structure and a display panel. The compensation sub-pixel unit includes a piezoelectric film. The compensation sub-pixel unit includes a switching transistor that has a control end connected to the piezoelectric film layer, and a first end connected to a data voltage signal end. The compensation sub-pixel unit includes a driving transistor that has a control end connected to a gate voltage signal end, a first end connected to a second end of the switching transistor, and a second end connected to a power signal end.

Abstract: The present disclosure relates to display technology field, particularly to a compensation sub-pixel unit, a method of fabricating the compensation sub-pixel unit, a method of driving the compensation sub-pixel unit, a pixel structure and a display panel. The compensation sub-pixel unit includes a piezoelectric film. The compensation sub-pixel unit includes a switching transistor that has a control end connected to the piezoelectric film layer, and a first end connected to a data voltage signal end. The compensation sub-pixel unit includes a driving transistor that has a control end connected to a gate voltage signal end, a first end connected to a second end of the switching transistor, and a second end connected to a power signal end.

Abstract: A semi-transparent semi-retroreflective film and an air display device are provided. The air display device includes: a first polarizer and a second polarizer assembled with each other to form a cell; a semi-transparent semi-reflective structure and a semi-transparent semi-retroreflective film disposed between the first polarizer and the second polarizer; a first ¼ wave plate disposed at a side of the air display device adjacent to the first polarizer; and a second ¼ wave plate disposed between the semi-transparent semi-reflective structure and the semi-transparent semi-retroreflective film. The air display device is configured such that polarized light incident from the first polarizer, after being processed by an internal optical path of the air display device, exits from the second polarizer to form an air image at a side of the air display device away from the first polarizer.

Abstract: A device for film thickness measurement and a method for film thickness measurement are disclosed. The device includes a planar indenter, a collecting unit and a processing unit. The planar indenter includes a base plate and a piezoelectric film layer. The collecting unit includes a plurality of collecting circuits evenly distributed above the piezoelectric film layer and spaced from each other. The collecting circuits are used for collecting current signals generated when the piezoelectric film layer deforms at positions corresponding to the collecting circuits. The processing unit is used for calculating a film thickness of the film sample to be measured based on the current signals collected by each of the collecting circuits.

Abstract: The embodiments of the invention disclose a device for film thickness measurement and a method for film thickness measurement. The device comprises a planar indenter, a collecting unit and a processing unit. The planar indenter comprises a base plate and a piezoelectric film layer. The collecting unit comprises a plurality of collecting circuits evenly distributed above the piezoelectric film layer and spaced from each other. The collecting circuits are used for collecting current signals generated when the piezoelectric film layer deforms at positions corresponding to the collecting circuits. The processing unit is used for calculating a film thickness of the film sample to be measured based on the current signals collected by each of the collecting circuits.