Method for maintaining the white colour point in a field...

Details Method for maintaining the white colour point in a field... Method for maintaining the white colour point in a field...

G - Physics

09

G

G09G 5/02 (2006.01) H04W 88/02 (2009.01) G02F 1/13 (2006.01) G09G 3/36 (2006.01) G09G 5/10 (2006.01)

Patent

CA 2519967

A field sequential liquid crystal display maintains its white colour point through compensation values to at least one colour light emitting diode that illuminates the display. The compensation values may be impedances to control the current or pulsing of the current source according to a pulse width modulation technique. A degradation curve may be used to calculate extrapolate the theoretical forward voltage of the light emitting diode. Additional complexity arises from the need for calculating uptime for multiple light emitting diodes of different colours. Brightness levels may also be factored in.

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