| http://www.w3.org/ns/prov#value | - till another aspect of the present invention comprises: n light-emitting devices, where n is an integer equal to or greater than 2; a measuring unit for measuring the luminance of the total of nlight-emitting devices operating in a liquid crystal panel; and a control unit for adjusting the luminance of the total of n light-emitting devices, based on the measurement by the measuring unit.
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