Barco N.v.

Other

Gerrit Verstraete

Tom Kimpe

Patrick Santy

A display having a spatial light modulator for dynamically controlling a luminance of each pixel according to an input signal, the spatial light modulator having a non uniform spatial characteristic, the display also having an optical filter having a spatial pattern to alter the luminance to compensate at least partially for the non uniform spatial characteristic. An electronic signal processing element applies some pre compensation predominantly of higher spatial frequencies for the non uniform spatial characteristic. Such dynamic and optical compensation can enable tuning for different optimizations or for compensating for variations over time. A backlight has an optical source and an optical filter, the source having a color output which has a non uniform spatial characteristic, and the optical filter having a spatial pattern to alter the color to compensate in part at least for the non uniform spatial characteristic.

Optical correction for high uniformity panel lights

A display has a spatial light modulator () for dynamically controlling a luminance of each pixel according to an input signal, the spatial light modulator having a non uniform spatial characteristic, the display also having an optical filter () having a spatial pattern to alter the luminance to compensate at least partially for the non uniform spatial characteristic. An electronic signal processing element applies some pre compensation predominantly of higher spatial frequencies for the non uniform spatial characteristic. Such dynamic and optical compensation can enable tuning for different optimizations or for compensating for variations over time. A backlight has an optical source and an optical filter, the source having a color output which has a non uniform spatial characteristic, and the optical filter having a spatial pattern to alter the color to compensate in part at least for the non uniform spatial characteristic.

A display has a spatial light modulator for dynamically controlling a luminance of each pixel according to an input signal, the spatial light modulator having a non-uniform spatial characteristic, the display also having an optical filter having a spatial pattern to alter the luminance to compensate at least partially for the non-uniform spatial characteristic. An electronic signal processing element applies some pre ompensation predominantly of higher spatial frequencies for the non-uniform spatial characteristic. Such dynamic and optical compensation can enable tuning for different optimizations or for compensating for variations over time. A backlight has an optical source and an optical filter, the source having a color output which has a non-uniform spatial characteristic, and the optical filter having a spatial pattern to alter the color to compensate in part at least for the non-uniform spatial characteristic.

An automatic axial field compensation and quick-degauss control system is disclosed. Further, a CRT type monitor incorporating such an automatic compensation and quick-degauss control circuit, and a new degauss circuit are disclosed in accordance with the present invention. The compensation and quick-degauss control circuit relies upon three sensors to respectively detect and quantify the axial, lateral, and vertical components of a disturbing ambient magnetic field. The axial and lateral field component sensors have non-parallel axes of sensitivity such that the sum of values represented by the output signals from these sensors indicates the magnitude of the axial component of the disturbing field. Based upon this summation signal, the system applies a correction current to at least one correction coil. If more than one correction coil is employed, the coils are connected in series so that only one current need be generated to effect compensation. Outputs from all three of the sensors are involved in quick-degauss control. The third sensor is a vertical component sensor. The disclosed quick degauss system is different from the resonant types, it operates by a switched mode. Voltage over the degaussing coils is switched between a positive and negative voltage, which voltages are stored in large capacitors.

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Pittem, Belgium

Gerrit Verstraete