Patent ID: 6680566
Filing Date: 2004-01-20
Classification: H01J

Abstract:
A wide-angle, shallow-depth, implosion-resistant television cathode ray tube, comprising:a glass faceplate; said faceplate comprising a substantially flat faceplate with a first surface which becomes an outer surface and substantially the viewing area of said television tube upon installation in a television set, and with a second surface opposite said first surface; said faceplate being configured and dimensioned for a display width of sixteen units and for a display height of nine units; a phosphor screen disposed adjacent to said second surface, being configured to be responsive to electron beams incident thereon, and being configured to emit visible light on said first surface of said faceplate when excited by electron beams; a shadow mask disposed adjacent to said phosphor screen and being configured with apertures configured to permit passage of electron beams therethrough; an electron gun means disposed at a distance away from said shadow mask and being configured to emit electron beams through said apertures of said shadow mask; a glass funnel; said glass funnel comprising (a.), (b.), (c.), (d.), and (e.), where (a.), (b.), (c.), (d.), and (e.) are: (a.) a solder edge portion; said solder edge portion being soldered to said faceplate; said solder edge portion comprising a substantially rectangular solder edge portion and being dimensioned for a display width of sixteen units and a display height of nine units; (b.) a cylindrical funnel throat portion configured to mount said electron gun means therein; (c.) a funnel body portion comprising a truncated substantially pyramidal funnel body portion; (d.) a parabolic transition portion being disposed between said cylindrical funnel throat portion and said pyramidal funnel body portion and forming a funnel throat transition portion; and (e.) a curved transition portion being disposed between said pyramidal funnel body portion and said solder edge portion and forming a solder edge transition portion; said solder edge portion having a pair of substantially parallel, vertical, solder edges which respectively become a right vertical solder edge and a left vertical solder edge upon installation of said glass funnel in a television set, and said solder edge portion having a pair of substantially parallel, horizontal, solder edges which respectively become an upper solder edge and a lower solder edge upon installation of said glass funnel in a television set; said upper solder edge being connected with said vertical solder edges to form an upper, right, solder edge corner and an upper, left, solder edge corner upon installation of said glass funnel in a television set; said lower solder edge being connected with said vertical solder edges to form a lower, right, solder edge corner and a lower, left, solder edge corner; said upper, right, solder edge corner and said lower, left, solder edge corner defining a first diagonal plane being disposed substantially perpendicular to said faceplate and being disposed between said upper, right, solder edge corner and said lower, left, solder edge corner; said upper, left, solder edge corner and said lower, right, solder edge corner defining a second diagonal plane being disposed substantially perpendicular to said faceplate and being disposed between said upper, left, solder edge corner and said lower, right, solder edge corner; said pair of vertical solder edges comprising respective midpoints, said midpoints being disposed substantially equidistant from said pair of horizontal solder edges, and said midpoints defining a horizontal plane being disposed substantially perpendicular to said faceplate; said pair of horizontal solder edges comprising respective midpoints, said midpoints being disposed substantially equidistant from said pair of vertical solder edges, and said midpoints defining a vertical plane being disposed substantially perpendicular to said faceplate; an intersection between said horizontal plane and said pyramidal funnel body portion defining a right horizontal straight linear portion on the right surface of said pyramidal funnel body portion, and a left horizontal straight linear portion on the left surface of said pyramidal funnel body portion; an intersection between said vertical plane and said pyramidal funnel body portion defining an upper, vertical, straight linear portion on the upper surface of said pyramidal funnel body portion, and defining a lower, vertical, straight linear portion on the lower surface of said pyramidal funnel body portion; an intersection between said first diagonal plane and said pyramidal funnel body portion defining a diagonal, right, upper straight linear portion on the upper surface of said pyramidal funnel body portion, and defining a diagonal, left, lower straight linear portion on the lower surface of said pyramidal funnel body portion; an intersection between said second diagonal plane and said pyramidal funnel body portion defining a diagonal, left, upper straight linear portion on the upper surface of said pyramidal funnel body portion, and defining a diagonal, right, lower straight linear portion on the lower surface of said pyramidal funnel body portion; all of said straight linear portions extending a substantial portion of the distance from said funnel throat transition portion to said solder edge transition portion; an intersection between said horizontal plane and said solder edge transition portion defining a first, horizontal, height, from said solder edge portion to a portion of each corresponding horizontal straight linear portion being closest to said solder edge portion; an intersection between said vertical plane and said solder edge transition portion defining a second, vertical, height, from said solder edge portion to a portion of each corresponding vertical straight linear portion being closest to said solder edge portion; an intersection between each said diagonal plane and its corresponding solder edge transition portion defining a third, diagonal, height, from said solder edge portion to a portion of each corresponding diagonal straight linear portion being closest to said solder edge portion; said first, horizontal, height being greater than either said second, vertical, height or said third, diagonal, height; said horizontal straight linear portion on the right surface of said pyramidal funnel body portion, and said horizontal straight linear portion on the left surface of said pyramidal funnel body portion each having a first, horizontal, slope; said upper straight linear portion on the upper surface of said pyramidal funnel body portion, and said lower straight linear portion on the lower surface of said pyramidal funnel body portion each having a second, vertical, slope; said diagonal, right, upper straight linear portion on the upper surface of said pyramidal funnel body portion, said diagonal, left, lower straight linear portion on the lower surface of said pyramidal funnel body portion, said diagonal, left, upper straight linear portion on the upper surface said pyramidal funnel body portion, and said diagonal, right, lower straight linear portion on the lower surface of said pyramidal funnel body portion all having a third, diagonal, slope; the steepness of said horizontal slope being shallower than either the steepness of said vertical slope or the steepness of said diagonal slope; the steepness of said diagonal slope being shallower than the steepness of said vertical slope; said first, horizontal, height from said solder edge portion to said portion of each corresponding horizontal straight linear portion being closest to said solder edge portion, being sufficiently great to dispose and configure each of said horizontal straight linear portions to have the shallowest slope of all of said straight linear portions; said television cathode ray tube further comprising: a deflection coil arrangement disposed about said parabolic transition portion and configured to deflect electron beams in a timed manner across said faceplate; an internal coating on said pyramidal funnel body portion, said coating comprising a conductive coating; and an arrangement configured and disposed to a supply a high voltage electron accelerating potential from a power supply to said internal coating; said glass funnel thus being configured to minimize the height of said pyramidal funnel body portion and thus to permit to position said deflection coil arrangement at a distance from said shadow mask to minimize errors of electron beams; minimize the weight of said glass funnel; and minimize risk of implosion; and to thus form a wide-angle, shallow-depth, implosion-resistant television cathode ray tube.