Today, mobile phones and touch screens are an important part of our everyday lives. Write a brief overview of the different touch sensing technologies used by touch screens and the operating principles behind these touch sensing techniques. Prepare a comparative table with the advantages and disadvantages of each of these techniques. Considering the contamination problems presented by touch-based systems (such as probable transmission of the corona virus), include a discussion on what kind of touchless sensing technologies can be introduced to upgrade touch-screens.
1: Needs at least 1250 words.
2: Please do a literature survey of the existing technologies and include these (and any other relevant references) in the references section in the last page.
3: No plagiarism.