Exit signs with LED illumination
First Claim
1. A light unit for use in lighted sign assemblies comprising:
- (a) a housing having;
(i) a rear wall,(ii) upstanding side walls along two opposed sides of said rear wall, and(iii) shield elements extending inwardly from adjacent the upper ends of said side walls;
(b) light arrays extending along said side walls and including a multiplicity of light emitting diodes disposed in spaced relationship above said rear wall and below said shield elements;
(c) power supply means to said diodes; and
(d) diffuser means extending across said housing above said shield elements, said rear wall being configured to reflect light emitted from said diodes relatively uniformly across said diffuser means which contributes to relative uniform transmission of light therethrough.
2 Assignments
0 Petitions
Accused Products
Abstract
A light unit for use in lighted sign assemblies has a housing with a rear wall, upstanding opposed side walls, and shield elements extending inwardly from adjacent the upper ends of the side walls. Light arrays extending along the side walls have light emitting diodes disposed in spaced relationship above the rear wall and below the shield elements, and a diffuser extends across the housing above the shield elements. The rear wall is configured to reflect light emitted from the diodes relatively uniformly across the diffuser which further contributes to relative uniform transmission of light therethrough. The power supply may include a circuit to transform alternating current line voltage into a reduced direct current voltage for the diodes, and the power supply may also provide direct current to the diodes from a battery power source when power is interrupted.
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Citations
21 Claims
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1. A light unit for use in lighted sign assemblies comprising:
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(a) a housing having; (i) a rear wall, (ii) upstanding side walls along two opposed sides of said rear wall, and (iii) shield elements extending inwardly from adjacent the upper ends of said side walls; (b) light arrays extending along said side walls and including a multiplicity of light emitting diodes disposed in spaced relationship above said rear wall and below said shield elements; (c) power supply means to said diodes; and (d) diffuser means extending across said housing above said shield elements, said rear wall being configured to reflect light emitted from said diodes relatively uniformly across said diffuser means which contributes to relative uniform transmission of light therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 19)
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17. A light unit for use in lighted sign assemblies comprising:
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(a) an elongated housing having; (i) a rear wall, (ii) upstanding side walls along the elongated opposed sides of said rear wall, and (iii) shield elements extending inwardly from adjacent the upper ends of said side walls, portions of said rear wall being inclined upwardly from said side walls towards a centerline extending generally parallel to said side walls; (b) light arrays extending along said side walls and including a multiplicity of light emitting diodes disposed in spaced relationship above said rear wall and below said shield elements; (c) power supply means to said diodes; and (d) diffuser means extending across said housing above said shield elements, said rear wall being configured to reflect light emitted from said diodes relatively uniformly across said diffuser means which contributes to relatively uniform transmission of light therethrough. - View Dependent Claims (18, 20, 21)
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Specification