Cromaclear

This adopted the slotted shadow mask and in-line electron gun pioneered by the 1966 GE Porta-Color and used by most then-current television tubes to computer monitor use.

It was claimed that Cromaclear could offer the image clarity and sharpness of the Trinitron and Diamondtron aperture grille CRTs without the disadvantages e.g. expense and the horizontal damping wires.

Although it was possible to use existing round phosphor gun technology with Cromaclear, a certain percentage of electron power would have been lost, thereby degrading overall image focus.

An effective visual to describe this phenomenon is a "round peg, square hole" analogy: while contact might be taking place, it’s not completely precise.

Excess energy transfer could lead to a warped grille or mask, resulting in possible image degradation (color purity and/or brightness uniformity problems).

This combination of dynamic beam focus and new electron guns also reduces the need for end-user moiré and convergence controls while enhanced brightness provides improved contrast.

For example, a CRT monitor with misaligned electron beams will show a white "H" on a black background with one of the primary or secondary colors shadowing its edges.

Damping wires can sometimes be visible to the user under extreme white plain background displays and mechanically obstruct the flow of the electron beams, critical to maximizing image focus.