LIGHT EMISSION CONTROL CIRCUIT, LIGHT EMISSION CONTROL METHOD, SURFACE LIGHTING APPARATUS, AND LIQUID CRYSTAL DISPLAY DEVICE WITH THE SURFACE LIGHTING APPARATUS

摘要

PROBLEM TO BE SOLVED: To reduce the cost and the power consumption by simplifying a power source circuit.

SOLUTION: A prescribed light emission device group among a plurality of light emission device groups is connected in series to a constant current circuit; the power source circuit supplies power to the light emission device groups; a current detection means detects the current flowing through the prescribed light emission device group; and a power source control means controls the power source circuit based on a previously set current value and a detected current value.

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