Question: Given the following passage  "Alphanumeric LEDs are available in seven-segment, starburst and dot-matrix format. Seven-segment displays handle all numbers and a limited set of letters. Starburst displays can display all letters. Dot-matrix displays typically use 5x7 pixels per character. Seven-segment LED displays were in widespread use in the 1970s and 1980s, but rising use of liquid crystal displays, with their lower power needs and greater display flexibility, has reduced the popularity of numeric and alphanumeric LED displays.",  answer the following question. Note that the answer is present within the text.  Question: What are visual displays used in electronic devices in which a layer of a liquid crystal is sandwiched between two transparent electrodes?
Answer:
liquid crystal displays