Display substrate, display panel, display device, method of detecting post spacer, and method of manufacturing post spacer

A display substrate, comprising:

• a base substrate;
• a plurality of sub-pixels arranged on the base substrate in an array in a row direction and a column direction;
• and
• a plurality of post spacers arranged at intervals on the base substrate, wherein the plurality of post spacers comprise at least one main post spacer and a plurality of sub post spacers, and each main post spacer of the at least one main post spacer has a height greater than a height of each of the sub post spacers,
• wherein each of the plurality of sub-pixels has at most one of the plurality of post spacers provided therein, the plurality of sub-pixels comprise a main sub-pixel provided with the main post spacer and a sub sub-pixel provided with the sub post spacer, the plurality of sub-pixels further comprise at least one mark sub-pixel adjacent to the main sub-pixel in the row direction or the column direction, and the at least one mark sub-pixel is provided with none of the plurality of post spacers,
• wherein said each main post spacer is adjacent to two sub post spacers of the sub post spacers in the row direction, and in a post spacer group comprising said each main post spacer and the two sub post spacers adjacent to said each main post spacer in the row direction, a separation distance between said each main post spacer and one of the two sub post spacers is greater than or equal to a separation distance between said each main post spacer and the other of the two sub post spacers,
• wherein in the post spacer group comprising said each main post spacer and the two sub post spacers adjacent to said each main post spacer in the row direction, the separation distance between said each main post spacer and one of the two sub post spacers is more than 2 times the separation distance between said each main post spacer and the other of the two sub post spacers.