Color filter substrate, manufacturing method thereof, and display panel

A manufacturing method of a color filter substrate, comprising:

• providing a substrate;
• forming an array of a plurality of pixel units on the substrate, wherein each pixel unit comprises a first sub-pixel, a second sub-pixel and at least two third sub-pixels, the at least two third sub-pixels being made of an irreversible temperature-sensitive pigment;
• and
• performing a temperature-variation treatment on one third sub-pixel in each pixel unit such that the one third sub-pixel changes color and becomes a fourth sub-pixel;
• wherein the at least two third sub-pixels in each pixel unit are formed by steps of:
• doping a photoresist with the irreversible temperature-sensitive pigment;
• applying the doped photoresist on the substrate;
• and
• exposing and developing the doped photoresist on the substrate to form two columns of third sub-pixels by using a mask plate, thereby obtaining the at least two third sub-pixels in each pixel unit;
• the at least two third sub-pixels in each pixel unit being located in a same row, wherein the mask plate comprises a mask pattern corresponding to the two columns of third sub-pixels;
• wherein the step of performing a temperature-variation treatment on one third sub-pixel in each pixel unit comprises:
• overlaying the one third sub-pixel with a heating layer, and
• heating the one third sub-pixel to the set temperature via the heating layer upon energization such that the one third sub-pixel changes color and becomes a fourth sub-pixel.