Sony Trinitron was a brand name for a type of cathode ray tube (CRT) used in televisions and computer monitors. It was developed by Sony in the 1960s and was introduced to the market in 1968. Trinitron CRTs were known for their superior picture quality, with brighter colors, sharper images, and better contrast than other CRTs at the time.

Trinitron CRTs used a patented aperture grille technology that allowed more electrons to reach the screen, resulting in a brighter image. The aperture grille also helped to reduce color bleed and improve image sharpness and contrast.

Trinitron CRTs were used in a wide range of Sony televisions and computer monitors, from small portable models to large widescreen sets. They were also used in some televisions and monitors from other manufacturers.

Trinitron CRTs were the dominant technology in televisions and computer monitors for many decades. However, they were eventually replaced by flat-panel displays, such as LCD and plasma displays. Sony stopped producing Trinitron CRTs in 2008.

Despite the fact that Trinitron CRTs are no longer produced, they are still prized by some people for their superior picture quality. Some people also use Trinitron CRT monitors for retro gaming and other specialized applications.