Display panel having divided area sub-pixel units

A display panel, comprising a pixel unit, the pixel unit comprising a plurality of sub-pixel units, each of the plurality of sub-pixel units comprising at least one transparent film layer, the at least one transparent film layer comprises:

• a buffer layer on a first base substrate,
• an interlayer insulating layer in a thin film transistor on a side of the buffer layer facing away from the first base substrate,
• a first protective layer on a side of the interlayer insulating layer facing away from the buffer layer,
• a planarization layer on a side of the first protective layer facing away from the interlayer insulating layer,
• a pixel defining layer on a side of the planarization layer facing away from the first protective layer, wherein the pixel defining layer defines a light-emitting area, and
• a light-emitting layer and a transparent electrode of an electroluminescent device on a side of the thin film transistor facing away from the first base substrate, wherein the electroluminescent device is electrically connects to the thin film transistor and the transparent electrode is on a side of the light-emitting layer facing away from the thin film transistor, wherein each of the plurality of sub-pixel units is divided into the light-emitting area and a light-transmitting area, and the quantity of the transparent film layer in the light-transmitting area is smaller than the quantity of the transparent film layer in the light-emitting area,
• wherein the interlayer insulating layer, the first protective layer, the planarization layer and the pixel defining layer are confined to the light-emitting area and excluded from the light-transmitting area, and the transparent electrode, the light-emitting layer and the buffer layer are disposed in both of the light-emitting area and the light-transmitting area,
• wherein at least a part of the plurality of sub-pixel units further comprises a color filter in the light-emitting area,
• wherein the plurality of sub-pixel units comprises a red sub-pixel unit, a blue sub-pixel unit, and a green sub-pixel unit, the light-emitting layers of the plurality of sub-pixel units are blue light-emitting layers, the red sub-pixel unit comprises a red color filter, the green sub-pixel unit comprises a green color filter, and the blue sub-pixel unit lacks a color filter.