Abstract: A head-up display device includes: an indicator dimmed by duty ratio control and configured to emit display light; a mirror member rotatable about a rotation shaft and configured to reflect the display light from the indicator to project a display image; a control unit configured to control the dimming of the indicator and the rotation of the mirror member; and a temperature sensor configured to output a signal corresponding to an ambient temperature around the indicator. The control unit includes: a temperature prediction unit configured to predict a temperature of the indicator, and a failure avoidance unit configured to execute lowering an upper limit of the duty ratio or rotation control of the mirror member for reducing the amount of sunlight that enters the indicator through the mirror member when the predicted temperature of the indicator is greater than or equal to a threshold.

Abstract: There is provided a head-up display device including an indicator that emits display light, a concave mirror that is rotatable about a rotation shaft and reflects the display light from the indicator to project a display image, a motor that has a shaft portion disposed coaxially with the rotation shaft of the concave mirror and rotates the shaft portion about an axis when energized, a connecting member that connects the shaft portion of the motor and the rotation shaft of the concave mirror and rotates the concave mirror at the same rotation angle as a rotation angle of the rotation shaft, and a control board that controls the motor. The control board controls rotation of the motor by half-step drive or micro-step drive.

Abstract: There is provided a conductive material in which, even when a conductive material is left for a certain period of time, solder of conductive particles can be efficiently placed on an electrode, and, in addition, even if an electrode width and an inter-electrode width are narrow, occurrence of migration can be effectively suppressed, and generation of voids can be effectively suppressed. The conductive material according to the present invention contains a plurality of conductive particles in which an outer surface portion of a conductive portion comprises solder, a thermosetting compound, an acid anhydride thermosetting agent, and an organophosphorus compound.

Abstract: There is provided a conductive material in which, even when a conductive material is left for a certain period of time, solder of conductive particles can be efficiently placed on an electrode, and, in addition, even if an electrode width and an inter-electrode width are narrow, occurrence of migration can be effectively suppressed, and generation of voids can be effectively suppressed. The conductive material according to the present invention contains a plurality of conductive particles in which an outer surface portion of a conductive portion comprises solder, a thermosetting compound, an acid anhydride thermosetting agent, and an organophosphorus compound.