The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 1995
Filed:
Oct. 28, 1993
Hua-Sou Tong, Arlington Heights, IL (US);
Chunghwa Picture Tubes, Ltd., Taoyuan, TW;
Abstract
A damping arrangement for use with a shadow mask in a color cathode ray tube (CRT) absorbs vibrations of the shadow mask, particularly at low frequencies, to maintain registration of the shadow mask apertures with phosphor deposits on the inner surface of the CRT's faceplate for high video image color purity. A damping material having a higher modulus of elasticity (Young's modulus) than that of the shadow mask is applied to one or both surfaces of the shadow mask either over the entire surface or in spaced bands extending the length or width of the mask. The damping coating may be applied either by spraying or by vacuum deposition and may be comprised of virtually any material having a higher modulus of elasticity than that of the shadow mask such as a glass-based frit or a heavy metal such as tungsten or molybdenum.