Warp-free dual compliant tension mask frame
AssigneeThomson Licensing S. A.
InventorJoseph Arthur Reed
Life of this patent
Estimating the term…
Abstract
A tension mask frame assembly for use in a cathode ray tube is provided. The tension mask frame assembly includes a substantially rectangular mask support frame, having a first coefficient of thermal expansion. The frame is formed of a pair of opposing long sides being joined to a pair of opposing short sides wherein one of these pairs has an attachment zone. The tension mask, having a second coefficient of thermal expansion, is supported by the frame at the attachment zones along the opposing sides. The attachment zones are formed of a material having a coefficient of thermal expansion which is approximately the same as the second coefficient of thermal expansion in order to be matched with the tension mask.
Claims9
A cathode ray tube having a tension mask frame assembly, said assembly comprising:
- a substantially rectangular mask support frame having a first coefficient of thermal expansion and including a pair of opposing long sides joined to a pair of opposing short sides, one of the pair of opposing long and short sides having attachment zones;
- a tension mask having a second coefficient of thermal expansion being supported by the frame at the attachment zones along the opposing sides;
- and
- the attachment zones being formed of a material having a coefficient of thermal expansion which is approximately the same as the second coefficient of thermal expansion.
A cathode ray tube having an electron gun for directing electron beams toward a screen and a mask disposed between the electron gun and the screen;
- the cathode ray tube comprising:
- a frame assembly for supporting the mask having a pair of opposing long sides and a pair of opposing short sides forming a rectangular mask support frame, one of the pair of opposing long and short sides being formed of end sections flanking a matched section wherein the end sections have a first coefficient of thermal expansion and the matched section has a second coefficient of thermal expansion which is substantially similar to a coefficient of thermal expansion of the mask.
Dependencies are inferred from the claim text.