Color film substrate, fabricating method therefor, display panel and display device

A display panel comprising a color film substrate and an array substrate cell-docked to each other, wherein the color film substrate comprises:

• a first base substrate,
• a color layer disposed on the first base substrate, wherein the color layer comprises a plurality of color blockers having gaps therebetween;
• and
• a light-blocking spacer layer comprising a plurality of light-blocking spacers respectively disposed between the plurality of color blockers;
• wherein a length of a surface of the light-blocking spacer facing the color blocker is larger than or equal to a length of a surface of the color blocker facing the light-blocking spacer, so as to avoid occurrence of color mixing,
• wherein the light-blocking spacers of the light-blocking spacer layer are black spacers,
• wherein each of the light-blocking spacers of the light-blocking spacer layer comprises a light-blocking portion and a protrusion portion, a plurality of the light-blocking portion respectively disposed between the plurality of color blockers, the protrusion portion protrudes with respect to a side of the color layer away from the first base substrate and has a height of any value between 0.5 μm and 3 μm,
• wherein the protrusion portion has a sectional shape of trapezoidal with a side thereof away from the color layer being a shorter bottom side,
• wherein the light-blocking portion has a sectional shape of trapezoidal with a side thereof contacting the color layer being a shorter bottom side,
• wherein the protrusion portion has a longer bottom side close to the color layer, the light-blocking portion has a longer bottom side away from the first base substrate, both of the longer bottom side of the protrusion portion and the longer bottom side of the light-blocking portion are common and have a same length,
• wherein the array substrate comprises a second base substrate provided thereon with a plurality of pixel defining layers and a plurality of light emitting units separated by the pixel defining layers, wherein each of the light emitting units corresponds to each of the color blockers of the color film substrate, and each of the pixel defining layers abuts against each of the light-blocking spacers of the color film substrate,
• wherein a maximum width of an orthographic projection of the light-blocking spacer on the first base substrate is equal to a maximum distance between adjacent ones of the color blockers.