Final answer:
TFT active-matrix displays are used in devices with flat-panel displays such as LCDs and laptops. CRTs and projectors operate on different technologies and do not use TFT active-matrix displays.
Step-by-step explanation:
The devices that use TFT active-matrix displays are primarily those with flat-panel displays. This includes LCD (liquid crystal display) technology and the screens of laptops. LCD is known for utilizing a large light source and millions of tiny units called pixels. Each pixel is comprised of three cells with red, blue, or green filters that control the light passing through them based on the voltage applied to the liquid crystals.
On the other hand, CRT (cathode-ray tube) and traditional projectors operate on different technological principles. CRTs use electron beams to stimulate phosphors on the screen to create images, while projectors typically use a light source and lenses to project images onto a surface.