Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Radiant energy controlled regulation of the current supply...
Patent
1999-04-09
2000-05-30
Tran, Thuy Vinh
Electric lamp and discharge devices: systems
With radiant energy sensitive control means
Radiant energy controlled regulation of the current supply...
320106, 345102, H05B 3702
Patent
active
060694491
ABSTRACT:
A device applicable to a digital still camera or similar handy apparatus for controlling the brightness of a backlight used to backlight an LCD (Liquid Crystal Display) panel is disclosed. Power to be fed from a battery to the backlight and therefore the brightness of the backlight is increased on the basis of the temperature of the backlight and the kind and remaining power of the battery. The device prevents the brightness of the LCD panel from falling even in a low temperature environment and thereby implements easy-to-see image display little effected by temperature.
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NEC Corporation
Tran Thuy Vinh
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