LIGHT EMITTING DIODE BACKLIGHT MODULE AND A DRIVING METHOD THEREOF

1 . A light emitting diode (LED) backlight module, comprising:

a light emitting matrix comprising a plurality of LED units arranged in a matrix having M rows and N columns;

M row signal lines;

N column signal lines;

a row driver for outputting, during a frame, M row-driving signals to sequentially enable the M rows of the LED units via the M row signal lines; and

a column driver for sequentially outputting, during said frame, 1 st to M th rows of data signals, each of which respectively corresponds to one the M row signal lines, to the N columns of the LED units via the N column signal lines for generating backlight of intended luminous intensity.

2 . The backlight module according to claim 1 , wherein the row driver is configured for preventing any two of the M row-driving signals from being at an enabling level simultaneously.

3 . The backlight module according to claim 1 , wherein the row driver is configured to sequentially enable the M rows of the LED units in said frame divided into 1 st to M th time periods with an equal length of duration.

4 . The backlight module according to claim 3 , wherein the column driver is configured to output the 1 st to M th rows of data signals to the LED units in the 1 st to M th time periods, respectively.

5 . The backlight module according to claim 1 , wherein the M row-driving signals comprise a J th row-driving signal and a (J+1) th row-driving signal, wherein the (J+1) th row is adjacent to the J th row, and the enabling time of the J th row driving signal partly overlaps with that of the (J+1) th row driving signal, whereby the LED units in the (J+1) th row and the J row are simultaneously enabled during said overlapping time.

6 . The backlight module according to claim 5 , wherein the row driver is configured to sequentially enable the M rows of the LED units in said frame divided into (M+I−1) time periods with an equal length of duration, the (M+I−1) time periods comprise a 1 st to an (I−1) th time periods, an I th to an M th time periods and an (M+1) th to an (M+I−1) th time periods, I is the number of rows of the LED units enabled within a time period among the I th time period to the M th time period.

7 . The backlight module according to claim 6 , wherein the number of rows of the LED units enabled within a time period among the 1 st time period to the (I−1) th time period is smaller than 1.

8 . The backlight module according to claim 6 , wherein the number of rows of the LED units enabled in the same time period during the (M+1) th time period to the (M+I−1) th time period is smaller I.

9 . The backlight module according to claim 6 , wherein the column driver is configured for:

outputting the first row of data signals in the 1 st time period via the N column signal lines,

respectively outputting the 1st row of data signals to the (I−2) th row of data signals sequentially in the corresponding 2 nd time period to (I−1) th time period via the N column signal lines;

respectively outputting the (I−1) th row of data signals to the (M−1) th row of data signals sequentially in the corresponding I th time period to M th time period via the N column signal lines,

respectively outputting the (M−I+3) th row of data signals to the M th row of data signals sequentially in the corresponding (M+1) th time period to (M+I−2) th time period via the N column signal lines; and

outputting the M th row of data signals in the (M+I−1) th time period via the N column signal lines.

10 . The backlight module according to claim 1 , wherein

the row driver is configured to simultaneously enable at least two adjacent rows of the LED units; and

the column driver configured to output a same row of data signals to the at least two adjacent rows of the LED units.

11 . A method of driving an LED backlight module, wherein the LED backlight module comprises a light emitting matrix comprising a plurality of LED units arranged in a matrix having M rows and N columns, the driving method comprising:

(a) outputting M row-driving signals, during a frame, to sequentially enable the M rows of the LED units via M row signal lines, respectively; and

(b) sequentially outputting, during said frame, the 1 st to M th rows of data signals, each of which respectively corresponds to one of the M row signal lines to the LED units via N column signal lines.

12 . The driving method according to claim 11 , wherein in the step (a), any two of the M row-driving signals are not at an enabling level simultaneously.

13 . The driving method according to claim 11 , wherein in the step (a), the M rows of the LED units are sequentially enabled in said frame divided into 1 st to M th time periods with an equal length of duration.

14 . The driving method according to claim 13 , wherein in the step (b), the 1 st to M th rows of data signals are respectively outputted to the LED units in the 1 st to M th time periods.

15 . The driving method according to claim 11 , wherein in the step (a), the M row-driving signals comprise a J th row-driving signal and a (J+1) th row-driving signal, wherein the (J+1) th row is adjacent to the J th row, and the enabling time of the J th row driving signal partly overlaps with that of the (J+1) th row driving signal, whereby the LED units in the (J+1) th row and the J th row are simultaneously enabled during said overlapping time.

16 . The driving method according to claim 15 , wherein in the step (a), the M rows of the LED units are sequentially enabled in said frame divided into (M+I−1) time periods with an equal length of duration, the (M+I−1) time periods comprise a 1 st to an (I−−1) th time periods, an I th to an M th time periods and an (M+1) th to an (M+I−1) th time periods, I is the number of rows of the LED units enabled within a time period among the I th time period to the M th time period.

17 . The driving method according to claim 16 , wherein in the step (a), the number of rows of the LED units enabled within a time period among the 1 st time period to the (I−1) th time period is smaller than 1.

18 . The driving method according to claim 16 , wherein in the step (a), the number of rows of the LED units enabled in the same time period during the (M+1) th time period to the (M+I−1) th time period is smaller than I.

19 . The driving method according to claim 16 , wherein the step (b) comprises:

(b 1 ) outputting the first row of data signals in the 1 st time period via the N column signal lines,

(b 2 ) respectively outputting the 1 st row of data signals to the (I−2) th row of data signals sequentially in the corresponding 2 nd time period to (I−1) th time period via the N column signal lines;

(b 3 ) respectively outputting the (I−1) th row of data signals to the (M−1) th row of data signals sequentially in the corresponding I th time period to M th time period via the N column signal lines,

(b 4 ) respectively outputting the (M−I+3) th row of data signals to the M th row of data signals sequentially in the corresponding (M+1) th time period to (M+I−2) th time period via the N column signal lines; and

(b 5 ) outputting the M th row of data signals in the (M+I−1) th time period via the N column signal lines.

20 . The driving method according to claim 11 , wherein

in the step (a), at least two adjacent rows of the LED units are simultaneously enabled; and

in the step (b), a same row of data signals is outputted to the at least two adjacent rows of the LED units.