Projection display device, projection control method, and projection control program

A projection display device having a projection display unit that performs, in accordance with input image data, spatial modulation on light emitted by a light source, and projects image light obtained through the spatial modulation onto a projection surface of a vehicle to display an image that is based on the image data,

• the projection surface being formed of a member having a reflectance that is higher for light in a plurality of wavelength ranges than for light in a wavelength range outside the plurality of wavelength ranges,
• the projection display device comprising:
• a rotation angle control mechanism comprising an actuator that controls a rotation angle of the image light on the projection surface;
• and
• a processor, being configured to function as
• an image light control unit that controls, in accordance with the rotation angle, amount of intensity of the light in the plurality of wavelength ranges included in the image light,
• wherein the image light control unit causes the amount of intensity of the light in the plurality of wavelength ranges included in the image light to reach a target value that is based on the rotation angle after a predetermined period of time elapses from when a change in the rotation angle is completed.

A projection control method for performing, in accordance with input image data, spatial modulation on light emitted by a light source, and projecting image light obtained through the spatial modulation onto a projection surface of a vehicle to display an image that is based on the image data,

• the projection surface being formed of a member having a reflectance that is higher for light in a plurality of wavelength ranges than for light in a wavelength range outside the plurality of wavelength ranges,
• the projection control method configured to perform functions comprising:
• controlling a rotation angle of the image light on the projection surface;
• and
• controlling, in accordance with the rotation angle, amount of intensity of the light in the plurality of wavelength ranges included in the image light,
• wherein the amount of intensity of the light in the plurality of wavelength ranges included in the image light is controlled in accordance with control information for the amount of intensity, the control information being stored in a storage medium and corresponding to the rotation angle,
• wherein the image light control unit controls the amount of intensity by obtaining parameters related with relation between the rotation angle and the amount of intensity.

A projection control method for performing, in accordance with input image data, spatial modulation on light emitted by a light source, and projecting image light obtained through the spatial modulation onto a projection surface of a vehicle to display an image that is based on the image data,

• the projection surface being formed of a member having a reflectance that is higher for light in a plurality of wavelength ranges than for light in a wavelength range outside the plurality of wavelength ranges,
• the projection control method configured to perform functions comprising:
• controlling a rotation angle of the image light on the projection surface;
• and
• controlling, in accordance with the rotation angle, amount of intensity of the light in the plurality of wavelength ranges included in the image light,
• wherein the amount of intensity of the light in the plurality of wavelength ranges included in the image light is caused to reach a target value that is based on the rotation angle after a predetermined period of time elapses from when a change in the rotation angle is completed.

A non-transitory computer readable medium storing a computer readable instructions to be loaded into a processor configured by the instructions to perform functions comprising, in accordance with input image data, spatial modulation on light emitted by a light source, and projecting image light obtained through the spatial modulation onto a projection surface of a vehicle to display an image that is based on the image data,

• the projection surface being formed of a member having a reflectance that is higher for light in a plurality of wavelength ranges than for light in a wavelength range outside the plurality of wavelength ranges,
• the computer readable instructions causing a computer to execute functions comprising:
• controlling a rotation angle of the image light on the projection surface;
• and
• controlling, in accordance with the rotation angle, amount of intensity of the light in the plurality of wavelength ranges included in the image light,
• wherein the amount of intensity of the light in the plurality of wavelength ranges included in the image light is controlled in accordance with control information for the amount of intensity, the control information being stored in a storage medium and corresponding to the rotation angle,
• wherein the image light control unit controls the amount of intensity by obtaining parameters related with relation between the rotation angle and the amount of intensity.

A non-transitory computer readable medium storing a computer readable instructions to be loaded into a processor configured by the instructions to perform functions comprising, in accordance with input image data, spatial modulation on light emitted by a light source, and projecting image light obtained through the spatial modulation onto a projection surface of a vehicle to display an image that is based on the image data,

• the projection surface being formed of a member having a reflectance that is higher for light in a plurality of wavelength ranges than for light in a wavelength range outside the plurality of wavelength ranges,
• the computer readable instructions causing a computer to execute functions comprising:
• controlling a rotation angle of the image light on the projection surface;
• and
• controlling, in accordance with the rotation angle, amount of intensity of the light in the plurality of wavelength ranges included in the image light,
• wherein the amount of intensity of the light in the plurality of wavelength ranges included in the image light is caused to reach a target value that is based on the rotation angle after a predetermined period of time elapses from when a change in the rotation angle is completed.