Led reading light

Abstract

A reading light such as is clipped onto the back of a book has two illuminating color zones; one being yellow/white and the other being blue/white. These are provided by separate LEDs. These LEDs are mounted on one or more arms which can be pivoted from a closed state to a deployed state. A manual switch allows the user to switch between the two different colors of illumination or select both at the same time. This approach enhances user comfort in reading the illuminated material. Certain materials and certain ambient light favor the use of a yellow/light illumination color while other materials and other conditions favor the use of a blue/white illumination color. This provides visual comfort for the user who can select which of the light color ranges is most comfortable and can select both if that provides greater comfort.

1 . A portable illumination device to facilitate user reading of various media comprising:
 at least first and second sets of LEDs mounted on the device,   said first set of LEDs adapted to project light having a first visible color range,   said second set of LEDs adapted to project light having a second visible color range, and   a switch coupled to said LEDs and adapted to provide power to said LEDs, said switch having a first on position to turn on only said first set of LEDs and a second on position to turn on only said second set of LEDs.   
     
     
         2 . The illumination device of  claim 1  wherein said first color is in a blue/white range and said second color is in a yellow/white range. 
     
     
         3 . The illumination device of  claim 1  further comprising:
 a first arm having a support clip adapted to said first arm to be read, 
 a pivotable arm adjacent to said first arm and pivotal about an axis through said first arm, 
 said first and second sets of LEDs mounted near the upper end of said pivotal arm, 
 said pivotable arm when in a first pivoted position illuminating the item being read and when in a second pivoted position being aligned with said support clip to provide a compact storage state. 
 
     
     
         4 . The illumination device of  claim 3  wherein said first color is in a blue/white range and said second color is in a yellow/white range. 
     
     
         5 . The illumination device of  claim 1  wherein: said switch has a third on position to turn on both of said first and second sets of LEDs. 
     
     
         6 . The illumination device of  claim 2  wherein: said switch has a third on position to turn on both of said first and second sets of LEDs. 
     
     
         7 . The illumination device of  claim 3  wherein: said switch has a third on position to turn on both of said first and second sets of LEDs. 
     
     
         8 . The illumination device of  claim 4  wherein: said switch has a third on position to turn on both of said first and second sets of LEDs. 
     
     
         9 . A portable illumination device to facilitate user reading of various media comprising:
 first and second arms, each arm having an upper end and a lower end,   said arms being coupled to one another for rotational movement about one another at their upper zones,   each of said arms having a front surface and a back surface,   a first and second set of LEDs at the lower zone of said front face of said first arm,   a mounting clip on the front face of said second arm,   first and second arms having a storage state in which said back surfaces of said arms are substantially coplanar with one another,   said clip carrying second arm having a longitudinal axis,   upper and lower portions of said clip carrying second arm being rotatable relative to one another about said longitudinal axis, said upper portion being substantially less than said lower portion,   deployment of said first LED carrying arm to a position where illuminating material to be read requiring rotation of said first arm about said first axis and followed by rotation of said first arm and said upper portion of said second arm about said longitudinal second axis,   rotation on said first arm about said first axis and rotation of said first arm and upper segment of said second arm above said longitudinal second axis permitting the user to clip said device onto a book cover and to select the incident angle of illumination for the page being read.   
     
     
         10 . The illumination device of  claim 9  wherein said first color is in a blue/white range and said second color is in a yellow/white range. 
     
     
         11 . The illumination device of  claim 9  wherein: said switch has a third on position to turn on both of said first and second sets of LEDs. 
     
     
         12 . The illumination device of  claim 10  wherein: said switch has a third on position to turn on both of said first and second sets of LEDs. 
     
     
         13 . The illumination device of  claim 9  wherein said second arm containing said LEDs comprises:
 first and second longitudinal wings, each of said wings being rotatable at a proximal end about first and second axes respectively, said first and second axes being parallel to each other, one member of said first set of LEDs being positioned near the distal end of each of said subsidiary arms, and one member of each of said second set of LEDs being positioned near the distal end of each of said subsidiary arms, 
 rotation of said wings about said axes providing a larger illuminated area than when said wings are in a retracted position.