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:
Feb. 23, 1988
Filed:
Jul. 23, 1986
Kiyoshi Tokita, Fukaya, JP;
Michio Nakamura, Fukaya, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A color cathode-ray tube is disclosed, which has a shadow mask facing the face plate inner surface and having slit apertures formed in a predetermined arrangement. The center-to-center distance or interval Px of the slit apertures on the horizontal axis increases as a first function along the horizontal axis from the center of the shadow mask to the periphery region thereof. The center-to-center distance or interval Sx in peripheral regions of the shadow mask remotest from the horizontal axis increases as a second function different from the first function along the horizontal axis from the vertical axis to the periphery region thereof. The first and second functions representing the respective slit aperture intervals Px and Sx are given as ##EQU1## where X is 1, 2, 3, . . . , and .alpha. and .beta. are .alpha.<3 and .beta..ltoreq.6.