LCD and backlight module thereof
A backlight module includes fluorescent lamps, an inverter for supplying power for the lamps, dimming circuits each connecting the lamp in series, a signal processor for converting a video signal into a dimming signal, and a control unit. The lamps are disposed as an array having more than two columns and two rows on a substrate. The control unit electrically connects the signal processor and the dimming circuit and changes the luminance of the lamps by adjusting the dimming circuit according to the dimming signal.
1. A backlight module, comprising:
a plurality of fluorescent lamps arranged to form an array having more than two columns and two rows on a substrate;
an inverter electrically connecting the fluorescent lamps to supply power to the fluorescent lamps;
a plurality of dimming circuits each electrically connecting one of the fluorescent lamps in series and being variable to adjust current flowing through the fluorescent lamp connected in series;
a signal processor being operable for converting a video signal into a dimming signal; and
a control unit electrically connecting the dimming circuits and the signal processor, the control unit being operable for switching the dimming circuits to adjust the current according to the dimming signal to change the luminance of the fluorescent lamps.
2. The backlight module of claim 1 , wherein the fluorescent lamps are bent tubes.
3. The backlight module of claim 2 , wherein each of the fluorescent lamps comprises:
a plurality of straight parts parallel to each others; and
at least one bent part, both ends of the bent part being connected to the straight parts respectively.
4. The backlight module of claim 3 , wherein each of the fluorescent lamps comprises an electrode, the electrode connecting one of the straight parts and having a first minimal distance from other straight parts.
5. The backlight module of claim 4 , wherein within two adjacent fluorescent lamps, the electrode of each fluorescent lamp has a second minimal distance from the bent part of the other fluorescent lamp, wherein the second minimal distance is smaller than the first minimal distance.
6. The backlight module of claim 2 , wherein the fluorescent lamps are U-shape or S-shape.
7. The backlight module of claim 1 , wherein the current comprises:
a plurality of high voltage parts for driving the fluorescent lamps to radiate; and
a plurality of low voltage parts arranged alternately with the high voltage parts, the voltage of the low voltage parts being smaller than the voltage of the high voltage parts.
8. The backlight module of claim 1 , wherein the dimming circuit is variable to change the duty of the current.
9. The backlight module of claim 1 , further comprising a plurality of connectors disposed on the substrate, each connector connecting the electrode of the fluorescent lamps respectively.
10. A display, comprising:
a panel having a plurality of display areas arranged to from a matrix having more than two columns and two rows;
a backlight module disposed below the panel, comprising:
a plurality of fluorescent lamps arranged to form an array having more than two columns and two rows on a substrate, the array being aligned to the matrix;
an inverter electrically connecting the fluorescent lamps to supply power for the lamps;
a plurality of dimming circuits each electrically connecting one of the fluorescent lamps in series and being variable to adjust current flowing through the fluorescent lamp connected in series;
a signal processor, being operable for converting a video signal into a dimming signal; and
a control unit, electrically connecting the dimming circuits and the signal processor, the control unit being operable for switching the dimming circuits to adjust the current according to the dimming signal to change the luminance of the fluorescent lamps.
11. The display of claim 10 , wherein the fluorescent lamps are bent tubes.
12. The display of claim 11 , wherein each of the fluorescent lamps comprises:
a plurality of straight parts parallel to each other; and
at least one bent part, both ends of the bent part being connected to the straight parts respectively.
13. The display of claim 12 , wherein each of the fluorescent lamps comprises an electrode, the electrode connecting one of the straight part and having a first minimal distance from another straight parts.
14. The display of claim 13 , wherein within two adjacent fluorescent lamps, the electrode of each fluorescent lamp has a second minimal distance from the bent part of the other fluorescent lamp, wherein the second minimal distance is smaller than the first minimal distance.
15. The display of claim 11 , wherein the fluorescent lamps are U-shape or S-shape.
16. The display of claim 10 , wherein the panel electrically connecting the signal processor, each display area being operable for changing the transmittance thereof according to the dimming signal.
17. The display of claim 10 , wherein the dimming circuit is variable to change the duty of the current.
18. The display of claim 10 , wherein the current having at least one high voltage part for driving the fluorescent lamps to radiate.