Abstract: In an image display apparatus, based upon such a relationship among previously measured power consumption in a power save mode, an application voltage and application time thereof, and also rising time of a screen when the power save mode is released, a heater application voltage and application time of this heater application voltage are calculated in order to realize power consumption and rising time, which are required with respect to each of modes. Based upon the calculation results, either a duty ratio of a switched voltage or application time of this heater application voltage are controlled. At the same time, when the power save mode is released, a higher voltage than the heater application voltage in the normal display mode is applied only for the calculated time period.

Abstract: Provided are an image correcting method and device capable of reducing power consumption necessary for correcting an image for a long-time use and a cathode ray tube display unit. A microcomputer 2 calculates a value of a correction current in such a manner that the correction current is more decreased monotonously as a time passes after a cathode ray tube is turned on. Drivers 3 to 7 and 22 generate and output the correction current according to the value of the correction current calculated by the microcomputer 2. A correcting device C is provided in the cathode ray tube and serves to correct an image displayed on the cathode ray tube on receipt of the correction currents from the drivers 3 to 7 and 22.

Abstract: In a system for use in combination with a power source circuit, a holding circuit is operable in response to interruption of an input signal to deenergize the power source circuit and is put into a self-holding state to hold a stop mode of the power source circuit. The self-holding state is released on arrival of the input signal to unlock the stop mode.