Abstract: Provided is an anti-peep screen, including a passive LCD module and a color LCD module stacked along a first direction; the passive LCD module includes a first electrode layer, a liquid crystal layer and a second electrode layer, the first electrode layer comprises a first sub-electrode, the second electrode layer comprises a second sub-electrode, and the first sub-electrode is opposite to the second sub-electrode and configured to input different voltages, so as to control a light transmission state of the passive LCD module. The anti-peep display screen of the present application solves the problems of poor display effect and single anti-peep function of existing anti-peep display screens by introducing a passive LCD module. Also provided is a vehicle-mounted display device and a vehicle.

Abstract: The present invention proposes a microfluidic chip including a microchannel enclosed and formed by a substrate and a cover sheet, a sample fluid added into the microchannel through a sample adding well, a height of a top wall of said microchannel being lower than a height of a contact surface of the substrate and the cover sheet. Through the above setup, it can effectively prevent the leakage of liquid from the side of the microchannel, make the detection results more accurate, and reduce the invalid detection rate and scrap rate.