The LX1970 light sensor can be used in conjunction with an LCD Front or Back Light Controller such as the LX1992 for LEDs or the LX1689 for CCFLs. This application note describes how to design in the LX1970.
Source: http://www.microsemi.com/micnotes/1403.pdf
Source: http://www.microsemi.com/micnotes/1403.pdf
