Head-up display apparatus and method of processing video data

A head-up display apparatus mounted on a transportation, the head-up display apparatus comprising:

• an information acquiring portion configured to acquire information on the transportation;
• a video display configured to display a video and to output video light of the displayed video;
• and
• a video-light projector configured to project the video light output from the video display to a display region, thereby causing the projected video light to be visually recognized as a virtual image,
• wherein video data is prepared based on the information on the transportation acquired by the information acquiring portion, and a part of the video data to be prepared is changed if at least one condition for preparing the video data does not meet a predetermined condition in a predetermined processing cycle, and
• wherein a control to change the part of the video data to be prepared is started if a preparation time, as one of the at least one condition for preparing the video data, does not meet the predetermined condition.

A head-up display apparatus mounted on a transportation, the head-up display apparatus comprising:

• an information acquiring portion configured to acquire information on the transportation;
• a video display configured to display a video and to output video light of the displayed video;
• a video-light projector configured to project the video light output from the video display to a display region, thereby causing the projected video light to be visually recognized as a virtual image;
• and
• a controller configured to determine display contents based on the information on the transportation acquired by the information acquiring portion, to prepare video data based on the determined display contents, and to cause the video display to display a video based on the prepared video data,
• wherein, if a preparation time required for preparing the video data of tentatively-determined display contents before determining the display contents is longer than a predetermined processing cycle, the controller changes the tentatively-determined display contents, and
• wherein, before determining the display contents, the controller predicts the preparation time required for preparing the video data based on the tentatively-determined display contents, predicted based on predicted time information for defining a relationship between the display contents and a predicted time required for preparing the video data, and changes the tentatively-determined display contents such that the preparation time is shorter than the processing cycle if the preparation time is longer than the processing cycle.