Liquid crystal display system with variable backlighting for data processing machine

Claim 1

A data processing machine, comprising: memory means for storing control instructions and data; processing means for executing said control instructions and processing said data; liquid crystal display means, operatively connected to said processing means, for displaying said data, said liquid crystal display means including a backlighting panel; driving means for driving said backlighting panel at several levels of luminosity; and selecting means, operatively connected to said driving means, for selecting a specific level of luminosity to cause said driving means to drive said backlighting panel at said specific level; a data latch circuit which outputs a specific luminosity level code to said driving means; said selecting means including luminosity modification means for modifying the specific level of luminosity in the data latch circuit, by displaying data processing conditions including a cursor and back lighting column information on the display; and means responsive to the position of the cursor on the back lighting column and the operation of a set up key for modifying specific luminance level code in the data latch circuit.