Which type of display is known for showing numerals and letters in a segmented format?

The correct answer is the type of display that utilizes a segmented format, which is specifically designed to represent numerals and letters clearly and efficiently. Seven-segment displays are composed of seven individual segments that can be lit in various combinations to form numbers and some letters. This format allows for easy readability of numerical data and is commonly used in devices like digital clocks, calculators, and various electronic instruments.

Seven-segment displays are especially advantageous in applications where space is limited, and quick comprehension of the displayed information is required. Their design offers a simple yet effective means of presenting information, usually in a two-dimensional layout, making them ideal for representing digits and certain alphanumeric characters.

While graphical displays and digital displays can show more complex images and texts, they do not specifically use the segmented technique characteristic of seven-segment displays. Touchscreen displays, although versatile, do not fall under the segmented display category, as they can present a wide range of graphic and text information through touch interaction rather than relying on predefined segments to form characters.