Backlight driving device, backlight driving method, and...

Details Backlight driving device, backlight driving method, and... Backlight driving device, backlight driving method, and...

2007-11-13

2007-11-13

Tran, Thuy Vinh (Department: 2821)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S083000, C345S088000, C315S308000

Reexamination Certificate

active

11281153

ABSTRACT:
A backlight driving device for controlling driving of a backlight device for display, the backlight device generating predetermined white light by mixing light from a plurality of light emitting diodes of three or more colors, the backlight driving device including: storing device for storing an initial amount of current and a predetermined multiplication coefficient for each color; light quantity detecting device for detecting a light quantity for each color; and controlling device for adjusting an amount of current passed through the light emitting diodes of each color by feedback control on a basis of a detection output from the light quantity detecting device with an amount of current obtained by multiplying the initial amount of current by the predetermined multiplication coefficient as an initial value, whereby the predetermined white light is generated; wherein when a difference between the amount of current after the feedback control and the initial amount of current exceeds a predetermined threshold value, the controlling device updates the multiplication coefficient according to the amount of current after the feedback control.

REFERENCES:
patent: 6621482 (2003-09-01), Fuller
patent: 7199771 (2007-04-01), Yamazaki et al.
patent: 2001-272938 (2001-10-01), None

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