Fail-safe illuminated display comprising multimodal illumination components
First Claim
1. An illuminated display that is susceptible to interruption or termination of active lighting capability and provides passive lighting capability in such circumstances, said illuminated display comprising:
- (a) an active illumination source providing said active lighting capability; and
(b) a display member containing photoluminescent pigment incorporated therein in sufficient amount and distribution to illuminate the display during said interruption or termination of active lighting capability, to provide said passive lighting capability;
wherein the display member containing photoluminescent pigment is arranged in light-receiving relationship to the active illumination source, and wherein the active illumination source simultaneously backlights the display member and charges the photoluminescent pigment contained by said display member.
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Accused Products
Abstract
An illuminated display that is susceptible to interruption or termination of active lighting capability and provides passive lighting capability in such circumstances. The illuminated display features an active illumination source providing active lighting capability and a display member (i) arranged in light-receiving relationship to the active illumination source and (ii) containing photoluminescent pigment incorporated therein in sufficient amount and distribution to illuminate the display during the interruption or termination of active lighting capability, to provide passive lighting capability. The illuminated display may further include a fluorescent pigment arranged in photoluminescent light-receiving relationship to the display member containing the photoluminescent pigment, whereby the fluorescent pigment down-converts photoluminescent light from the display member during the interruption or termination of active lighting capability.
54 Citations
32 Claims
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1. An illuminated display that is susceptible to interruption or termination of active lighting capability and provides passive lighting capability in such circumstances, said illuminated display comprising:
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(a) an active illumination source providing said active lighting capability; and
(b) a display member containing photoluminescent pigment incorporated therein in sufficient amount and distribution to illuminate the display during said interruption or termination of active lighting capability, to provide said passive lighting capability;
wherein the display member containing photoluminescent pigment is arranged in light-receiving relationship to the active illumination source, and wherein the active illumination source simultaneously backlights the display member and charges the photoluminescent pigment contained by said display member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 25, 26, 27)
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12. An illuminated display that is susceptible to interruption or termination of active lighting capability and provides passive lighting capability in such circumstances, said illuminated display comprising:
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(a) an active illumination source providing said active lighting capability; and
(b) an optically non-opaque display member (i) forming at least part of a housing for the illuminated display, (ii) arranged in light-receiving relationship to the active illumination source and (iii) containing photoluminescent pigment incorporated therein in sufficient amount and distribution to illuminate the display during said interruption or termination of active lighting capability, to provide said passive lighting capability; and
(c) a fluorescent pigment on or in the display member, for down-converting photoluminescent light from the display member during the interruption or termination of active lighting capability. - View Dependent Claims (28, 29)
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13. A method of providing passive lighting capability for an actively illuminated display including an active illumination source that is susceptible to interruption or termination of active lighting capability, so that light is provided to the display during said interruption or termination, wherein said method comprises:
arranging in light-receiving relationship to the active illumination source a display member containing photoluminescent pigment incorporated therein in sufficient amount and distribution to illuminate the display during said interruption or termination of active lighting capability, to provide said passive lighting capability, wherein said active illumination source simultaneously backlights said display member and charges the photoluminescent pigment contained by said display member. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 30, 31, 32)
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24. A method of providing sustained illumination, comprising:
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coupling a powered illumination source with a photoluminescent pigment arranged in light-receiving relationship to the powered illumination source, whereby the powered illumination source provides active illumination and continuously charges the photoluminescent pigment under powered conditions, and whereby the photoluminescent pigment provides passive illumination in the event of failure of the powered illumination source, and arranging a fluorescent pigment in light-receiving relationship to the photoluminescent pigment, to enhance illumination in the event of failure of the powered illumination source.
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Specification