Abstract: To protect a battery when an anomaly of a charge circuit occurs. Information equipment includes: a charge circuit for controlling an output voltage of a DC power supply and applying the controlled voltage to a battery; a battery protection circuit for interrupting a first power supply path connecting the battery and the charge circuit when an anomaly of the battery occurs; an input voltage detection circuit for detecting an input voltage which is input from the DC power supply to the charge circuit; and an interruption circuit for determining that an anomaly of the charge circuit has occurred, and interrupting a second power supply path connecting the first power supply path or the DC power supply and the charge circuit when the input voltage detected by the input voltage detection circuit fluctuates and indicates an abnormal value.

Abstract: When there is a temperature difference along the length of a cold cathode tube used as a light source for a display device, a cataphoresis phenomenon occurs due to movement of mercury enclosed contained within the tube, thereby shortening the tube life. In order to solve this problem, temperature sensors are provided to detect a temperature difference between both the ends of the tube. A duty cycle of a voltage waveform to be applied from a DC/AC inverter to the tube is changed so as to cancel movement of the mercury due to the temperature difference.

Abstract: When there is a temperature difference along the length of a cold cathode tube used as a light source for a display device, a cataphoresis phenomenon occurs due to movement of mercury enclosed contained within the tube, thereby shortening the tube life. In order to solve this problem, temperature sensors are provided to detect a temperature difference between both the ends of the tube. A duty cycle of a voltage waveform to be applied from a DC/AC inverter to the tube is changed so as to cancel movement of the mercury due to the temperature difference.

Abstract: The information processing apparatus equipped with a liquid crystal display apparatus that is usable in the face-to-face usage style. When the display direction is switched into the facing direction and in a normal usage state, the liquid crystal display apparatus exhibits an excellent visual recognizability and complicated operations are unnecessary. The image information, the picture direction of which has been inverted upside down, is outputted from the information processing unit 2 to the display unit 1 in such a manner as to be coupled with the picture direction change instructing member 3. At the same time, the luminance information at the time of the picture upside-down inversion, which has been set in advance into the luminance adjusting member 4, is supplied to the display unit 1 so as to change the luminance simultaneously with the picture inversion.