IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0729927
(2003-12-09)
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등록번호 |
US-7263792
(2007-09-04)
|
발명자
/ 주소 |
|
출원인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
21 |
초록
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A long-range house number identification panel has its number indicia mounted on an illuminated viewing screen, being individually readable with the naked eye from up to 200 feet distance. An electrically energizable phosphorescent screen behind the indicia serves to illuminate the numbers at night.
A long-range house number identification panel has its number indicia mounted on an illuminated viewing screen, being individually readable with the naked eye from up to 200 feet distance. An electrically energizable phosphorescent screen behind the indicia serves to illuminate the numbers at night. The identifying indicia may consist of transparencies through the surface of a blanking screen. A photocell switches off the screen in daylight; and the level of screen illumination may be limited below the optimum, by operating at a reduced voltage so as to extend the service life of the screen. A u/v barrier coat may be used to protect the phosphor of the screen against solar degradation.
대표청구항
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The invention claimed is: 1. A house number identification panel, having a plurality of number indicia in selected arrangement positioned externally upon a viewing screen, a single electrically energizable phosphorescent screen having a rated operating voltage to provide a first level of luminescen
The invention claimed is: 1. A house number identification panel, having a plurality of number indicia in selected arrangement positioned externally upon a viewing screen, a single electrically energizable phosphorescent screen having a rated operating voltage to provide a first level of luminescence of said screen, located behind said indicia; electrical supply means to energize said single phosphorescent screen to provide to said screen a voltage less than said rated operating voltage, to provide an acceptable lower level of luminescence, below said first level of luminescence and switch means responsive to a predetermined ambient light condition, connected in controlling relation with said electrical supply means, to disconnect said electrical supply from said screen and enable operation of said panel in an electrically unenergized condition under said predetermined ambient light condition; a framing border surrounding the identification panel comprising two spaced side members, a bottom member and a top member, wherein the top member protrudes outwardly beyond said bottom and side members. 2. The identification panel as set forth in claim 1, wherein said top member includes a recess for housing said electrical supply means. 3. The identification panel as set forth in claim 2 having a lateral width to accommodate four of said indicia. 4. The identification panel as set forth in claim 1, wherein said indicia are selected from the group consisting of separate, individual indicia of opaque material, and an opaque sheet having apertures therethrough shaped in the form of said indicia to permit the passage of light from said screen when energized. 5. A luminescent display for use in illuminating identification indicia, including a housing for attachment to a support surface; a single phosphorescent screen having a viewable area, substantially opaque indicia means mounted externally upon said luminescent display; and electrical energizing means connected to the screen to apply a predetermined voltage to the screen in energizing relation therewith to illuminate the single phosphorescent screen to view the indicia when the screen is energized, said predetermined voltage being at a value significantly less than the rated value of said single phosphorescent screen, to correspondingly extend the service life expectancy for the screen; said housing defining along one surface a framing border having two spaced side members, a lower member and an upper member, wherein the upper member extends outward from the surface beyond the lower and side members. 6. The luminescent screen as set forth in claim 5, including light-responsive cut-out means disposed on said upper member to disconnect said energizing means from said screen when ambient light exceeds a predetermined threshold level, to thereby significantly reduce the time of energization of said screen and to correspondingly increase the life expectancy of the screen. 7. The luminescent screen as set forth in claim 5, wherein said phosphorescent screen has a light-toned colour, and said opaque indicia means are dark coloured, to provide a readily visible contrast under external illumination, to facilitate viewing from a distance. 8. The luminescent screen as set forth in claim 5, said upper member includes a recess, said energizing means disposed in said recess. 9. An illuminated sign comprising: (a) a housing having a surface defining a top bottom, two spaced sides and a display opening; (b) a single phosphorescent panel disposed within said housing, said phosphorescent panel defining a screen adjacent said display opening; (c) an ultraviolet filter layer disposed over said screen; (d) indicia associated with said screen; (e) electrical circuitry for energizing said phosphorescent panel to visually illuminate said screen for viewing said indicia; (f) a light sensor to activate said reduced electrical power means at a selected level of light condition; (g) said ton protruding outwardly from said surface beyond said bottom and two sides. 10. The illuminated sign as set forth in claim 9, wherein said screen has a light-toned colour, and said indicia means are dark coloured, to provide a readily visible contrast under external illumination, for easy legibility. 11. The illuminated sign as set forth in claim 9, wherein said light sensor includes a photo cell incorporating a light-actuated switch that activates to an open circuit condition on exposure to ambient light of predetermined density. 12. A sign as claimed in claim 9 wherein said top defines a raised bridge portion, adjacent said display opening and projecting exteriorly beyond said screen and said single phosphorescent panel disposed below the top. 13. An illuminated sign as claimed in claim 12 wherein said light sensor is disposed within said raised bridge portion. 14. An illuminated sign as claimed in claim 13 wherein said raised bridge portion includes a recess for receiving said electrical circuitry. 15. A method of Illuminating identification indicia disposed in front of a single phosphorescent panel defining a screen having a protective ultraviolet filter layer, comprising: (a) powering at all times said single phosphorescent panel with electrical power means at a level below the rated power level of the phosphorescent panel to visually illuminate said screen and prolong the longevity of said single phosphorescent panel; (b) placing said ultraviolet filter layer on said screen to prolong the longevity of said single phosphorescent panel; (c) activating said electrical power means below a selected level of light condition so as to visually view said identification indicia and deactivate said electrical power means above said selected level of light condition with switching means so as to prolong the longevity of said single phosphorescent panel. 16. A method as claimed in claim 15 wherein said switching means is placed remote from said phosphorescent panel. 17. A method as claimed in claim 15 wherein said single phosphorescent panel is disposed in a housing, said housing including a top, bottom and two spaced sides, said top defining a raised bridge portion projecting exteriorly beyond said bottom and two sides, said switching means disposed in the top.
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