In-vehicle display apparatus

1. An in-vehicle display apparatus comprising a display device and a control section that causes information of a vehicle to be displayed as an image in the display device, wherein: the vehicle is configured to switch between a driving manipulation mode, in which drive force of the vehicle is controlled based on a driving manipulation made by a driver, and a driving assistance mode, in which driving assistance is implemented to automatically control the drive force of the vehicle; the control section includes one or more processors; and the one or more processors: in the driving manipulation mode, cause display to be performed in a driving manipulation display format, in which one or more first images that indicate a physical quantity accompanying the drive force of the vehicle using an indicator and a parameter change with respect to the indicator are displayed; and in the driving assistance mode, cause display to be performed in a driving assistance display format, in which the first images are deleted and a second image concerning the driving assistance is displayed, wherein the first images comprise an arc-shaped circumferential-direction indicator line, a scale formed on the arc-shaped circumferential-direction indicator line, and an indicator needle configured to move along the arc-shaped circumferential-direction indicator line in response to the parameter change, and wherein in the driving assistance display format, an entirety of the arc-shaped circumferential-direction indicator line, the scale, and the indicator needle of the first images are hidden.

2. The in-vehicle display apparatus according to claim 1 , wherein:

the vehicle includes a mode switching portion by which the driver performs a mode switching operation to transition from the driving manipulation mode to the driving assistance mode;

the driving manipulation mode includes a main mode, in which the driver performs the driving manipulation without performing the mode switching operation, and a transitional mode, which is a stage in which the mode switching operation has been performed but the vehicle has not yet transitioned to the driving assistance mode;

the driving manipulation display format of the main mode is a main display format, in which two types of the first images are displayed next to each other; and

the driving manipulation display format of the transitional mode is a transitional display format, in which the two types of first images are moved away from each other and the second image is displayed between the two types of first images that have been moved away from each other.

3. The in-vehicle display apparatus according to claim 2 , wherein:

the two types of first images are a speed meter image, in which speed of the vehicle is displayed in an analog manner, and a rotational speed meter image, in which rotational speed of a drive source of the vehicle is displayed in an analog manner.

4. The in-vehicle display apparatus according to claim 2 , wherein:

in the main display format, a third image is displayed in a middle region set between the two types of first images; and

in the transitional display format, the third image is moved to and displayed in a region other than the middle region and the second image is displayed overlapping the middle region of the main display format.

5. The in-vehicle display apparatus according to claim 4 , wherein:

the third image is a sign image indicating a sign of a road on which the vehicle is currently travelling.

6. The in-vehicle display apparatus according to claim 2 , wherein:

the two types of first images in the transitional display format are reduced in size, compared to the two types of first images in the main display format.

7. The in-vehicle display apparatus according to claim 1 , wherein:

a display position of the first image in the driving manipulation display format partially overlaps a display position of the second image in the driving assistance display format.

8. The in-vehicle display apparatus according to claim 1 , wherein:

in the driving manipulation display format and the driving assistance display format, speed numerical value images, which indicate a numerical value of speed of the vehicle, are arranged at a same position as each other.

9. The in-vehicle display apparatus according to claim 8 , wherein:

in the driving assistance display format, an upper limit value image, which shows an upper limit value of the speed of the vehicle in the driving assistance mode, is placed at a position near and lateral to the speed numerical value image.

10. The in-vehicle display apparatus according to claim 1 , wherein:

in the driving manipulation display format, a circular image, which indicates information of the vehicle, is arranged inside the first image that forms an arc shape; and

the circular image remains to be displayed even when the first image is deleted in the driving assistance display format.