Control module and method for controlling backlight module of LCD

A liquid crystal display, comprising:

• a display module;
• a back light module having n light sources, where n is a positive integer and greater than 2;
• a programmable voltage generator for producing a plurality of driving voltage signals;
• a driving circuit coupled to the programmable voltage generator and the back light module for respectively and correspondingly driving the light sources according to the driving voltage signals;
• and
• a timing control circuit coupled to the display module for respectively detecting the illumination status of each light source and accordingly controlling the programmable voltage generator to produce the driving voltage signals having an appropriate amplitude for respectively driving the light sources,
• wherein when the timing control circuit detects the mth light source cannot be illuminated, the timing control circuit controls the programmable voltage generator to increase the brightness of the (m+1)th and the (m−1)th light source, and adjusts the weight of the (m+1)th and the (m−1)th light source responsible gray scale data within the display area, wherein m is neither 1 nor n.

A method of controlling a back light module having n light sources, where n is a positive integer and greater than 2, the controlling method comprising:

• activating the back light module;
• detecting the illumination status of each light source;
• increasing the brightness of the (m+1)th and the (m−1)th light source when the mth light source is found to be non-illuminated and m is neither 1 nor n, where m is a positive integer;
• increasing the brightness of the second light source when the first light source is found to be non-illuminated;
• and
• increasing the brightness of the (n−1)th light source when the nth light source is found to be non-illuminated;
• wherein the weight of the (m+1)th and the (m−1)th light source responsible gray scale data within the display area is adjusted when the mth light source cannot be illuminated.