Display control device, projection device, and non-transitory storage medium

A projection device comprising:

• a receiver, which in operation receives vehicle information including at least one of information on a vehicle, intra-vehicle information, and extra-vehicle information and receives information on a speed limit of a road where the vehicle travels;
• an image generator that generates a predetermined image based on the vehicle information and the information on the speed limit and outputs the predetermined image to a display medium;
• and
• a controller that controls the image generator, wherein
• the predetermined image represents a presentation image that indicates a speed limit when displayed on the display medium, and
• the controller
• causes the image generator to generate a first predetermined image representing a first presentation image that indicates a first speed limit,
• senses change in the speed limit of the road where the vehicle travels from the first speed limit to a second speed limit lower than the first speed limit based on the information on a speed limit of a road,
• after sensing the change in the speed limit, determines whether or not necessity to increase conspicuity of notification on the display medium of the change in the speed limit is high in accordance with the vehicle information, and
• when it is determined that the necessity to increase the conspicuity of the notification of the change in the speed limit is high, using the image generator, causes display on the display medium to be switched by a first switching method from the first presentation image to a second presentation image that indicates the second speed limit, or when it is determined that the necessity to increase the conspicuity of the notification of the change in the speed limit is not high, causes the display on the display medium to be switched by a second switching method different from the first switching method from the first presentation image to the second presentation image,
• wherein at least one of the receiver, an image generator and controller is included in a processor.

A non-transitory storage medium that stores a display control program performed in a display control device in a display system including:

• an acquisition unit to acquire vehicle information including at least one of information on a vehicle, intra-vehicle information, and extra-vehicle information and acquire information on a speed limit of a road where the vehicle travels;
• and an image generator to generate a predetermined image based on the vehicle information and the information on the speed limit and output the predetermined image to a display medium, the predetermined image representing a presentation image that indicates a speed limit when displayed on the display medium, the display control program causing a computer of the display control device to execute a process comprising:
• causing the image generator to generate a first predetermined image representing a first presentation image that indicates a first speed limit;
• sensing change in the speed limit of the road where the vehicle travels from the first speed limit to a second speed limit lower than the first speed limit based on the information on a speed limit of a road;
• after sensing the change in the speed limit, determining whether or not necessity to increase conspicuity of notification on the display medium of the change in the speed limit is high in accordance with the vehicle information;
• and
• when it is determined that the necessity to increase the conspicuity of the notification of the change in the speed limit is high, using the image generator, causing display on the display medium to be switched by a first switching method from the first presentation image to a second presentation image that indicates the second speed limit, or when it is determined that the necessity to increase the conspicuity of the notification of the change in the speed limit is not high, causing the display on the display medium to be switched by a second switching method different from the first switching method from the first presentation image to the second presentation image.