Automatic electrochromic control of light level of vacuum fluorescent display
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United States of America Patent
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-
Mar 16, 1999
Issued Date -
N/A
app pub date -
Mar 8, 1996
filing date -
Feb 25, 1992
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A vehicle having instrumentation indicative of parameters associated with the operation of the vehicle, which instrumentation includes variable intensity light emitting elements whereby the instrumentation will be appropriately displayed to the vehicle operator. A light sensing control system is provided for sensing varying light level conditions and generating corresponding electrical signals indicative of the varying light levels. The control system is responsive to the electrical signals and effective to vary the intensity of the light emitting elements over a range as a function of the varying light levels so that the instrumentation will remain visible to the vehicle operator, but not at a distracting brightness to the vehicle operator, during variable light level conditions. Another feature of the invention is the provision of a control for adjusting the intensity of the light emitting elements independently of glare causing light levels.
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