Backlight unit
AssigneeLG.Philips LCD Co., Ltd.
InventorsHoon Jang, Jong Choi
Life of this patent
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Abstract
A backlight unit includes a case; a plurality of fluorescent lamps on the case, each fluorescent lamp having ends arranged in one direction, and having first and second electrodes provided at respective ends; a first power supply line connected with the first electrode; a second power supply line connected with the second electrode; a common electrode PCB arranged adjacent to the ends of the fluorescent lamps; a first common electrode on the common electrode PCB and connected with the first power supply line; a second common electrode on the common electrode PCB and connected with the second power supply line, the first and second common electrodes being spaced apart from each other; and an inverter to apply voltages to the first and second common electrodes.
Claims34
A backlight unit, comprising:
- a case;
- a plurality of fluorescent lamps on the case, each fluorescent lamp having ends arranged in one direction, and having first and second electrodes provided at respective ends;
- a first power supply line connected with the first electrode;
- a second power supply line connected with the second electrode;
- a common electrode PCB arranged adjacent to the ends of the fluorescent lamps;
- a first common electrode on the common electrode PCB and connected with the first power supply line;
- a second common electrode on the common electrode PCB and connected with the second power supply line, the first and second common electrodes being spaced apart from each other;
- and
- an inverter to apply voltages to the first and second common electrodes.
A backlight unit, comprising:
- a case;
- a plurality of fluorescent lamps arranged symmetrically along a longitudinal center line on the case, the plurality of fluorescent lamps including first and second sets such that each fluorescent lamp of the first set has two ends arranged at a first side of the case with first and second electrodes respectively provided at the two ends and such that each fluorescent lamp of the second set has two ends arranged at a second side of the case with third and fourth electrodes respectively provided at the two ends;
- first to fourth power supply lines respectively connected with each one of the first to fourth electrodes;
- a first common electrode PCB arranged adjacent to the ends of the first set of the fluorescent lamps;
- a second common electrode PCB arranged adjacent to the ends of the second set of the fluorescent lamps;
- first and second common electrodes on the first common electrode PCB and respectively connected with the first and second power supply lines, the first and second common electrodes being spaced apart from each other;
- third and fourth common electrodes on the second common electrode PCB and respectively connected with the third and fourth power supply lines, the third and fourth common electrodes being spaced apart from each other;
- and
- first inverter to apply voltages to the first and second common electrodes and second inverters to apply voltages to the third and fourth common electrodes.
A backlight unit, comprising:
- a case;
- a plurality of fluorescent lamps arranged on the case N sets of lamps in N areas of the case, each fluorescent lamp of the each of the N sets has two ends with first and second electrodes respectively provided at the two ends;
- N first and second power supply lines respectively connected with the first and second electrodes of the fluorescent lamps of each of the N sets;
- N common electrode PCBs respectively arranged adjacent to ends of corresponding ones of the N sets, each of the N common electrode PCBs having first and second common electrodes formed thereon spaced apart from each other and connected with corresponding ones of the N first and second power supply lines;
- first and second inverters to respectively apply power to the first and second electrodes of the fluorescent lamps of the N sets.
Dependencies are inferred from the claim text.