The invention discloses a display panel
assembly and an adjusting method thereof, and a
display device. The display panel
assembly comprises a display panel, a drive circuit and a
control circuit. Display panel is provided with a display area and a fan-out area. The display area is provided with multiple first
data lines. The fan-out area is provided with multiple second
data lines with various lengths, and the multiple second
data lines are connected with the first data lines. The drive circuit comprises a functional circuit and an adjustable
resistor set which is connected with the output end of the functional circuit. The second data lines are coupled with the output end of the functional circuit via the adjustable
resistor set which is used for reducing impedance difference of connection lines from the output end of the functional circuit to the first data lines. The
control circuit is used for controlling resistance of the adjustable
resistor set. Therefore, a situation of oversized
signal delay difference among all the connection lines can be avoided, and thus excellent display of the display panel with uniform color and brightness can be realized.