The viewing window for the roof of the
passenger train comprises an outer frame, the outer frame is of a hollow frame structure, the outer frame is of an arc-shaped structure with the middle protruding, a display
assembly is installed in the outer frame, the display
assembly is matched with the bent shape of the outer frame, the display
assembly comprises a first transparent plate and a second transparent plate, and the first transparent plate is connected with the second transparent plate. The first transparent plate and the second transparent plate are glued and fixed, the first transparent plate is arranged on the outer side of the second transparent plate, the second transparent plate is close to the inner side of a
carriage, a
liquid crystal dimming film is arranged between the first transparent plate and the second transparent plate, and the
liquid crystal dimming film is connected with a
voltage or current
control circuit in a vehicle body to change the light
transmittance of the
liquid crystal dimming film. According to the viewing window for the roof of the
passenger train, in the display assembly, the
laminated glass and single-layer
glass structure is adopted to be bonded with the liquid
crystal dimming film, the intensity of light in the
train can be manually adjusted according to different time periods and illumination conditions, and more comfortable,
safer and more environment-friendly travel experience is provided for passengers.