DISPLAY DEVICE
PURPOSE:To correct a difference in brightness between display units and adjust the units to uniformize rightness on the whole by applying an optional offset voltage to an automatic brightness control signal of each display unit and applying the proper offset voltage. CONSTITUTION:Since a variable of...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | PURPOSE:To correct a difference in brightness between display units and adjust the units to uniformize rightness on the whole by applying an optional offset voltage to an automatic brightness control signal of each display unit and applying the proper offset voltage. CONSTITUTION:Since a variable offset voltage generating means 5-1 is provided, an adjusting person makes a visual judgement and operates the variable offset voltage generating means 5-1 of a display unit U9 to apply the offset voltage to an applying means 4-1 so that the unit has the same brightness with other display units U1. The applying means 4-1 applies the offset voltage from an offset voltage generating means 5-1 to an ABL voltage detected by an ABL signal detecting means 2-1 and outputs the value to an ABL control means 1-1. The ABL control means 1-1 controls the brightness and contrast of a video amplifying circuit 18-1 according to the inputted value. |
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