Backlight unit and method of driving the same
AssigneeLG. Philips LCD Co., Ltd.
InventorSin Kyun Park
Life of this patent
Estimating the term…
Abstract
A backlight unit includes at least one cold cathode fluorescent lamp arranged at a lower end of a bottom cover, external electrode fluorescent lamps arranged on the bottom cover above the cold cathode fluorescent lamp, and inverters disposed on a rear side of the bottom cover for driving the at least one cold cathode fluorescent lamp and the external electrode fluorescent lamps.
Claims20
A backlight unit, comprising:
- at least one cold cathode fluorescent lamp having internal electrodes and arranged at a lower end of a bottom cover;
- external electrode fluorescent lamps arranged on the bottom cover above the cold cathode fluorescent lamp;
- and
- inverters disposed on a rear side of the bottom cover for driving the at least one cold cathode fluorescent lamp and the external electrode fluorescent lamps.
A backlight unit, comprising:
- a cold cathode fluorescent lamp at a lower end of a bottom cover and having first and second inner electrodes;
- external electrode fluorescent lamps arranged on the bottom cover above the cold cathode fluorescent lamps, and each of which has first and second external electrodes;
- and
- first and second common electrodes at both ends of the external electrode fluorescent lamps that respectively contact the first and second external electrodes of each external electrode fluorescent lamp.
A method of driving a backlight unit, the backlight unit having a cold cathode fluorescent lamp having internal electrodes and arranged at a lower end of a bottom cover, and external electrode fluorescent lamps arranged on the bottom cover above the cold cathode fluorescent lamp, the method comprising:
- applying alternating current to the cold cathode fluorescent lamps having internal electrodes and arranged at the lower end of the bottom cover;
- and
- applying alternating current to the external electrode fluorescent lamps in a phase shifting manner after sequentially applying the alternating current to the one cold cathode fluorescent lamp.
A backlight unit, comprising:
- a cold cathode fluorescent lamp at a lower end of a bottom cover and having first and second inner electrodes;
- external electrode fluorescent lamps arranged on the bottom cover above the cold cathode fluorescent lamps, and each of which has first and second external electrodes;
- plural pairs of fastening members separated from each other while defining a slit in each pair of fastening members for holding the first or second external electrodes therein;
- and
- a first or second common electrode line on both sides of the pairs of fastening members to connect the fastening members with each other.
Dependencies are inferred from the claim text.