CRT display matrix that emits ultraviolet light
AssigneesSony Corporation, Sony Electronics Inc.
InventorJohn Friedrich Breuninger
Life of this patent
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Abstract
An additional phosphor-excitation mechanism improves the light output of a visible-light emitting phosphor. One excitation mechanism indirectly excites the visible-light emitting phosphor by first striking a non-visible-light emitting particle (such as an ultra-violet-emitting phosphor) with an electron beam, which then emits non-visible radiation that strikes a visible-light emitting phosphor. The non-visible-light emitting particles can be disposed behind and/or adjacent to die visible-light emitting phosphors. A second mechanism directly excites the visible-light emitting phosphor by directly striking the visible-light emitting phosphor with an electron beam. Thus, the same visible-light emitting phosphor is activated by the first indirect mechanism as well as the second direct mechanism.
Claims15
A method for increasing image brightness in a cathode ray tube display comprising:
- exciting a phosphor particle using a first excitation mode, wherein the first excitation mode comprises indirectly activating the phosphor particle;
- and
- exciting the phosphor particle using a second excitation mode, wherein the second excitation mode comprises directly activating the phosphor particle by striking the phosphor particle with an electron beam.
A method for activating a phosphor stripe in a cathode ray tube comprising:
- activating a light-emitting phosphor stripe by causing an electron beam to impinge on the phosphor stripe from behind the phosphor stripe;
- and
- activating the light-emitting phosphor stripe by causing an electron beam to impinge op a non-visible-light emitting phosphor strip adjacent to the phosphor stripe.
Dependencies are inferred from the claim text.