Display device

The present invention is equipped with a display (40) for displaying the current state of the engine compression ratio when a variable compression ratio mechanism (20) capable of changing the engine compression ratio in an internal combustion engine is provided. For example, when driving with an engine compression ratio with good fuel economy the driver can be notified that the driving state is one with good fuel economy, without unnecessarily switching the display during acceleration of the vehicle. In addition, when the state switches from a driving state with good fuel economy to a drivingstate with poor fuel economy due to sudden pressing of the gas pedal, for example, the display of the engine compression ratio changes in response thereto. 具有能够对内燃机的内燃机压缩比进行变更的可变压缩比机构(20)，设置有对当前的内燃机压缩比的状态进行显示的显示器(40)。例如如果以油耗良好的内燃机压缩比驾驶，则即使在车辆的加速时也不切换为不必要的显示，能够使驾驶者识别出是油耗良好的驾驶状态。另方面，例如如果通过对加速器踏板的急剧的踏入操作而从油耗良好的驾驶状态切换为油耗较差的驾驶状态，则内燃机压缩比的显示也伴随与此而变化。