Light sensing method having sensing order adjusting mechanism

A light sensing method having a sensing order adjusting mechanism, comprising the following processes:

• performing a first light sensing operation to sense a first reflected light signal within a first phase time included in each of a plurality of sensing cycles, wherein [the] a first light signal is reflected by a tested object to form the first reflected light signal;
• counting a first coarse count value according to the first reflected light signal within the first phase time of each of the plurality of sensing cycles;
• performing a fine counting operation on the first coarse count value to output a first fine count value within the first phase time of each of the plurality of sensing cycles;
• performing a second light sensing operation to sense a second reflected light signal within a second phase time included in each of the plurality of sensing cycles, wherein a second light signal is reflected by the tested object to form the second reflected light signal;
• counting a second coarse count value according to the second reflected light signal within the second phase time of each of the plurality of sensing cycles;
• performing the fine counting operation on the second coarse count value to output a second fine count value within the second phase time of each of the plurality of sensing cycles;
• turning off the light-emitting component during a third phase time included in each of the plurality of sensing cycles;
• performing an ambient light sensing operation to sense a first ambient light signal within the third phase time of each of the plurality of sensing cycles;
• counting a third coarse count value according to the first ambient light signal within the third phase time of each of the plurality of sensing cycles;
• performing the fine counting operation on the third coarse count value to output a third fine count value within the third phase time of each of the plurality of sensing cycles;
• and
• sequentially performing the plurality of sensing cycles, wherein an order of performing the first light sensing operation, the second light sensing operation and the ambient light sensing operation in a next one of the plurality of sensing cycles is different from that in a previous one of the plurality of sensing cycles.