SLOT MASK

In CRT (Cathode Ray Tube) technology, a slot mask refers to a type of shadow mask used to control the electron beams in color CRT displays. It is an alternative to the traditional shadow mask design.

A slot mask consists of a metal plate with precision-cut slots arranged in a grid pattern. These slots are aligned with the phosphor dots on the screen, allowing the electron beams to pass through and strike the appropriate phosphor elements. The purpose of the slot mask is to ensure that the electron beams hit the correct color phosphors with high precision.

Compared to a shadow mask, a slot mask offers several advantages. It allows for higher electron beam current density, resulting in brighter images and improved color saturation. The slot mask design also minimizes the risk of misalignment between the mask and the phosphor dots, reducing potential color registration issues.

Slot mask CRTs are known for producing sharp and vibrant images with excellent color accuracy. They have been widely used in high-end CRT monitors and televisions, particularly in the professional and broadcast industry where color fidelity and precision are crucial.

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