Wiper control system for a vehicle and a method thereof

A wiper control system comprising:

• a rain droplet detector with a plurality of switches that are configured to be electrically connected by rain droplets, each switch outputting one of two different signals according to an electrical connection thereof;
• a multiplexer receiving signals from each of the plurality of the switches, the multiplexer being configured to repeatedly perform a process of selecting one of the received signals and outputting the selected signal;
• a count register connected to the multiplexer to receive the signal output from the multiplexer, the count register counting a number of the signals corresponding to the electrical connection of the switches of the rain droplet detector and outputting a counted value;
• and
• a wiper control unit connected to the count register to receive the counted value, the wiper control unit controlling a speed of a wiper based on the counted value, further comprising a clock signal provider providing a clock signal to the multiplexer, wherein the multiplexer selects one of the signals input from the rain droplet detector based on the received clock signal, further comprising a wiper position sensor detecting a position of the wiper and outputting a corresponding wiper position signal, wherein the clock signal provider receives the wiper position signal and is configured to output the clock signal when the wiper rotates by a predetermined angle,
• wherein the wiper control unit determines a rain droplet amount level based on the received counted value, determines a wiper speed level based on the determined rain droplet amount level, and controls the wiper to operate at the determined speed level, and
• wherein the wiper control unit determines the rain droplet amount level using the counted values that are acquired during 3 strokes of the wiper.

A wiper control method comprising:

• determining an initial wiper speed level among nine predetermined wiper speed levels that include nine sequential levels from a wiper speed level 1 to a wiper speed level 9, each of the predetermined wiper speed levels corresponding to a different wiper speed;
• detecting an amount of rain droplets and determining a corresponding rain droplet amount level among seventeen predetermined rain droplet amount levels that include seventeen sequential levels from a rain droplet amount level 0 to a rain droplet amount level 16, each of the predetermined rain droplet amount levels corresponding to a different rain droplet amount;
• and
• controlling a wiper speed based on the rain droplet amount level and the initial wiper speed level, wherein in the controlling a wiper, the wiper speed level is regulated based on the rain droplet amount level and the initial wiper speed level, and the wiper is controlled to operate a predetermined number of times in response to the regulated wiper speed level.