Abstract: A display panel and a manufacturing method thereof, and a display device are provided. The display panel includes a backlight module and an array substrate. The array substrate includes an insulation structure is located in the opening region. A first groove is defined at a side of the insulation structure away from the backlight module. A first insulation layer and a second insulation layer are filled in the first groove. The second insulation layer is located on a side of the first insulation layer close to the backlight module, and a refractive index of the second insulation layer is less than a refractive index of the first insulation layer.

Abstract: A hair treatment device includes a main body and a housing. The main body includes a tool bit device. The housing includes an accommodating cavity. The tool bit device is movably accommodated in the accommodating cavity in a telescopic manner. When the tool bit device is accommodated in the accommodating cavity, the tool bit device is automatically turned off; and when the tool bit device extends out of the accommodating cavity, the tool bit device is automatically turned on. According to the hair treatment device of the present disclosure, the tool bit device is movably accommodated in the accommodating cavity in the telescopic manner, so that the tool bit device is effectively protected. Meanwhile, the tool bit device is disposed to be automatically turned on or turned off, which is not required to manually operate a control switch to control an on-and-off state of the tool bit device.