Display substrate and display apparatus

A display substrate having a display area and a peripheral area, comprising:

• a base substrate;
• a black matrix in the peripheral area on the base substrate;
• and
• an auxiliary black matrix in the peripheral area on the base substrate and spaced apart from the black matrix by a main gap, the auxiliary black matrix being in an outer peripheral region of the peripheral area, the outer peripheral region being a region outside the black matrix and on a side of a region in the peripheral area occupied by the black matrix distal to the display area;
• wherein the auxiliary black matrix comprises a plurality of auxiliary black matrix blocks spaced apart from each other;
• gaps separating adjacent auxiliary black matrix blocks of the plurality of auxiliary black matrix blocks from each other comprise a plurality of first gap portions, a respective one of which having a first elongated shape, a longitudinal direction of the first elongated shape of the plurality of first gap portions substantially along a first direction;
• gaps separating adjacent auxiliary black matrix blocks of the plurality of auxiliary black matrix blocks from each other further comprise a plurality of second gap portions, a respective one of which having a second elongated shape, a longitudinal direction of the second elongated shape of the plurality of second gap portions substantially along the second direction;
• the plurality of first gap portions and the plurality of second gap portions form an inter-connected gap network independent of the main gap;
• two directly adjacent first gap portions of the plurality of first gap portions that are not directly connected by the main gap are connected by one of the plurality of second gap portions;
• two directly adjacent second gap portions of the plurality of second gap portions that are not directly connected by the main gap are connected by one of the plurality of first gap portions;
• a first total number of auxiliary black matrix blocks per first unit area is greater than a second total number of auxiliary black matrix blocks per second unit area, the first unit area and the second unit area having a same size, the second unit area being closer to the display area than the first unit area;
• and
• a first area of a first respective one of the plurality of auxiliary black matrix blocks is smaller than a second area of a second respective one of the plurality of auxiliary black matrix blocks, the second respective one of the plurality of auxiliary black matrix blocks being closer to the display area than the first respective one of the plurality of auxiliary black matrix blocks.