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
Remedy for overactive bladder comprising acetic acid anilide derivative as the active ingredient
Electronic flash device
Method of driving stereoscopic display apparatus and stereoscopic display apparatus
Method and apparatus for executing load distributed printing
Microcapsules, their use and processes for their manufacture
Storing a location within metadata of visual media
Lens system
  Randomly Featured Patents
Physical layer repeater configuration for increasing MIMO performance
Entertainment center
Arrangement for cooling and supporting a continuously cast metal strand
Direct positive silver halide photographic light-sensitive material depress formation of re-reversed negative image
Fuel cell
Bias circuit having process variation compensation and power supply variation compensation
Environmentally protected switch construction
Semiconductor device having patterned SOI structure and method for fabricating the same
Digital circuit for steepening color-signal transitions
Load floor latch