fig2 shows an embodiment of a flat panel display . the timing controller 104 , display panel 106 , line controller 108 and row controller 110 are identical to the conventional flat panel display in fig1 . in addition , a memory device 202 , backlight controller 204 , converter 206 and inverter 212 are provided . the converter 206 comprises a lookup table ( not shown ) implemented by an arithmetic circuit or digital component , capable of transforming input values into corresponding output values . after a digital signal 102 is received by the converter 206 , the lookup table performs color temperature compensation , white balance and gamma correction for the digital signal 102 , and an image signal is then output to the row controller 110 . the timing controller 104 receives the digital signal 102 and output a control signal to the line controller 108 for scan line synchronization . a backlight controller 204 is provided for outputting a brightness control signal to the inverter 212 after the brightness parameters in the memory device 202 is read , such that the brightness presented on the display panel 106 is corrected . the inverter 212 is capable of adjusting the output current or output duty cycle according to the brightness control signal , and the brightness of the display panel 106 is tuned accordingly . a pixel map of the visual output is generated by the row controller 110 , and the inverter 212 determines the brightness of the visual output . the line controller 108 receives the control signal for scan line synchronization . based on the architecture , display efficiency remains unaffected because power consumption is proportionally decreased by adjusting the inverter 212 . the inverter 212 can be a pulse width modulation ( pwm ) inverter , wherein the brightness is proportional to the duty cycle of current . the memory device 202 can be an eeprom or efprom , storing brightness parameters configured in the manufacture stage . the backlight controller 204 and converter 206 can be independent circuit components , or implemented in the timing controller 104 . the backlight controller 204 and converter 206 , performing gamma correction , white balance and color temperature compensation , are capable of transforming the digital signal 102 to an image signal based on specific lookup tables configured at manufacture stage such as gamma curve , and generating visual output on display panel 106 via row controller 110 . the specific lookup tables are stored in memory device 202 , thus is flexible to program . fig3 is a flowchart of brightness correction . specific driving conditions are defined , and characteristics of all flat panel displays can be measured under the same driving condition . for example , the flat panel displays can receive identical brightness control signals , and identical white balance parameters . in step 302 , the brightness of each flat panel display under the same driving condition is measured . in step 304 , the lowest brightness is chosen as a reference , and in step 306 , brightness parameters of each flat panel display are calculated by comparison with the lowest brightness and then stored in the memory device 202 . in step 308 , the brightness parameter is read by the backlight controller 204 , and a corresponding backlight control signal is generated to control the inverter 212 and generate a current to drive the flat panel display with corrected brightness . measurement of brightness under the specific driving conditions comprises the following steps . first , at least one of the following steps is performed on each display panel : gamma correction , white balance and color temperature compensation . thereafter , the brightness of each display panel is measured . fig4 shows brightness level of a plurality of flat panel displays . under specific driving conditions , each display panel presents different brightness , and in the embodiment of fig3 , the lowest brightness is chosen as a reference , for example , lcd7 , whereby all other display panels are reduced accordingly to achieve brightness uniformity among the plurality of flat panel displays . while the invention has been described by way of example and in terms of the preferred embodiment , it is to be understood that the invention is not limited thereto . rather , it is intended to cover various modifications and similar arrangements ( as would be apparent to those skilled in the art ). therefore , the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements .