Resources Contact Us Home
Light mask

Image Number 5 for United States Patent #5499304.

Apparatus for producing a light mask for balancing light across a display area of a vehicle instrument cluster comprises a camera, a digitiser and a computer. An image of the display area is obtained and digitized to produce data relating to the illumination levels of the image at a plurality of pixels. The illumination levels are used to calculate an appropriate light mask for the display area on the basis of the transmissive density of the masking ink used and of a reference illumination value relating to the least lit part of the display area which it is desired to illuminate. The light mask comprises an array of dots having a diameter related to the amount of attenuation required in the area in which the dot is located. Up to three masking layers may be provided if a single layer is insufficient to produce the required attenuation with the chosen masking ink. Balanced coverlays can readily be produced, and the number of masking layers required can also be reduced.

  Recently Added Patents
Inspection systems and methods for detecting defects on extreme ultraviolet mask blanks
Printing apparatus
Method of preparing MgB.sub.2 superconducting wire and the MgB.sub.2 superconducting wire prepared thereby
Electronic flash device
Duty cycle adjustment of remote illumination source to maintain illumination output
Systems and methods for providing a collaboration place interface including data that is persistent after a client is longer in the collaboration place among a plurality of clients
Portable hand-held multi-function device for storing, managing and combining rewards
  Randomly Featured Patents
Method for controlling memory in digital system
Deformable mirror, in particular for a laser beam material machining apparatus
Brake valve infinitely variable pressure intensification
Liquid crystal polymer optical filter carrier
Liquid crystal display device and driving method of the same
Method of determining the technical address of a communication partner and telecommunications apparatus
Harness formation end-effector with interchangeable tool capability
Method of applying a protective film, optionally including advertising or other visible material, to the surface of a handrail for an escalator or moving walkway
Side push handles for a patient lift
Dry cleaning method and apparatus