Display apparatus and method of driving display apparatus

A display apparatus, comprising:

• a plurality of light emitting elements;
• a drive circuitry configured to drive light emission of the plurality of light emitting elements;
• at least one processor;
• and
• one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
• process signals output from the plurality of light emitting elements irradiated with light without emitting, wherein the plurality of light emitting elements include a plurality of light emitting element groups that emit light with different wavelengths;
• and
• detect a predetermined wavelength based on output values of signals output from a light emitting element included in at least two groups of the plurality of light emitting element groups, wherein the at least two groups of the plurality of light emitting element groups comprise a first light emitting element group and a second light emitting element group, and wherein the predetermined wavelength is detected by subtracting an output value of the second light emitting element group from an output value of the first light emitting element group.