Image display apparatus

1. An image display apparatus comprising:

a display unit including an illumination unit configured to emit an illumination light and change an intensity of the illumination light, and a light modulation element configured to modulate the illumination light, the display unit being configured to display an image by projecting a light modulated using the light modulation element onto a projection surface;

an input unit configured to receive input data including an input image in which a first dynamic range is defined and including information relating to luminance of the input image, and

at least one processor or circuit configured to execute a plurality of tasks including:

a converting task configured to convert the first dynamic range into a second dynamic range having a maximum luminance lower than that of the first dynamic range;

a set value acquiring task configured to acquire a user set maximum luminance that is a user set value of the maximum luminance of the second dynamic range;

a luminance acquiring task configured to acquire a maximum display luminance that is a display luminance when the display unit displays the maximum luminance of the second dynamic range under the intensity of the illumination light set for the illumination unit; and

a generating task configured to generate a setting screen used for a user setting of the user set value and to make the display unit display the setting screen,

wherein a) the information relating to luminance acquired from the data, b) the user set maximum luminance and c) the maximum display luminance are displayed on the setting screen in a comparable way.

2. The image display apparatus according to claim 1 ,

wherein a first EOTF is defined for the first dynamic range of the input image, and

wherein the converting task converts the first EOTF into a second EOTF defined for the second dynamic range.

3. The image display apparatus according to claim 2 ,

wherein the first EOTF is SMPTE ST2084.

4. The image display apparatus according to claim 1 ,

wherein the luminance acquiring task acquires the maximum display luminance by using a sensor configured to measure a luminance of an image displayed by the display unit or of an image display surface of the display unit.

5. The image display apparatus according to claim 1 ,

wherein the display unit includes a luminance adjusting unit configured to adjust a display luminance by changing the intensity of the illumination light or a light reduction amount of the illumination light, and

wherein the luminance acquiring task acquires the maximum display luminance by using the light emission intensity or the light reduction amount each of which is adjusted by the luminance adjusting unit.

6. The image display apparatus according to claim 1 ,

wherein the at least one processor or circuit configured to execute a task of:

a setting condition acquiring task configured to acquire a user set display condition that is a user set value of the intensity of the illumination light set for the illumination unit,

wherein the luminance acquiring task acquires the maximum display luminance that is a display luminance when the display unit displays the user set maximum luminance under the user set display condition, and

wherein the setting screen includes, on a same screen, a first set area used for a user setting of the user set maximum luminance and a second set area used for a user setting of the user set display condition.

7. The image display apparatus according to claim 6 ,

wherein the setting screen displays information indicating a relative relation between the information relating to luminance and at least one of the user set maximum luminance and the user set display condition.

8. The image display apparatus according to claim 6 ,

wherein the setting screen displays information indicating a relative relation between the maximum display luminance and at least one of the user set maximum luminance and the user set display condition.

9. The image display apparatus according to claim 6 ,

wherein the setting screen two-dimensionally displays the first set area and the second set area such that the first set area is displayed in one of a horizontal direction and a vertical direction of the setting screen and the second set area is displayed in the other of the horizontal and vertical directions,

wherein the setting screen further displays a graph indicating a relation between a luminance of the input image and the display luminance.

10. The image display apparatus according to claim 1 ,

wherein the display unit includes a projection optical system configured to project an image light onto a projection surface, and

wherein at least one of a zoom state and a focus state of the projection optical system is displayed on the setting screen.

11. The image display apparatus according to claim 10 ,

wherein the projection optical system is shiftable in a direction orthogonal to an optical axis of the projection optical system, and

wherein a shift state of the projection optical system is displayed on the setting screen.

12. The image display apparatus according to claim 10 ,

wherein a state correlated with at least one of an area of the projected image on the projection surface and a distance from the image display apparatus to the projection surface is displayed on the setting screen.

13. The image display apparatus according to claim 1 ,

wherein the at least one processor or circuit configured to execute a task of:

a controlling task configured to control at least one of the intensity of the illumination light and the maximum luminance of the second dynamic range by using the maximum display luminance and the information relating to luminance of the input image.

14. The image display apparatus according to claim 13 , wherein

the controlling task changes the intensity of the illumination light when the maximum display luminance and the information relating to luminance of the input image have a difference larger than a predetermined value, and

wherein the controlling task matches the maximum luminance of the second dynamic range to the maximum display luminance when the maximum display luminance and the information relating to luminance of the input image do not have the difference larger than the predetermined value.

15. A control method of an image display apparatus including a display unit including an illumination unit configured to emit an illumination light and change an intensity of the illumination light, and a light modulation element configured to modulate the illumination light, the display unit being configured to display an image by projecting a light modulated using the light modulation element onto a projection surface, and being configured to receive input data including an input image in which a first dynamic range is defined and including information relating to luminance of the input image, the control method comprising steps of:

converting the first dynamic range into a second dynamic range having a maximum luminance lower than that of the first dynamic range;

acquiring a user set maximum luminance that is a user set value of the maximum luminance of the second dynamic range;

acquiring a maximum display luminance that is a display luminance when the display unit displays the maximum luminance of the second dynamic range under the intensity of the illumination light set for the illumination unit; and

generating a setting screen used for a user setting of the user set value and making the display unit display the setting screen,

wherein a) the information relating to luminance acquired from the data, b) the user set maximum luminance and c) the maximum display luminance are displayed on the setting screen in a comparable way.

16. A non-transitory computer-readable storage medium storing a computer program that causes a computer of an image display apparatus to execute a controlling method,

wherein the image display apparatus includes a display unit including an illumination unit configured to emit an illumination light and change an intensity of the illumination light, and a light modulation element configured to modulate the illumination light, the display unit being configured to display an image by projecting a light modulated using the light modulation element onto a projection surface, and being configured to receive input data including an input image in which a first dynamic range is defined and including information relating to luminance of the input image, and

wherein the control method includes steps of:

converting the first dynamic range into a second dynamic range having a maximum luminance lower than that of the first dynamic range;

acquiring a user set maximum luminance that is a user set value of the maximum luminance of the second dynamic range;

acquiring a maximum display luminance that is a display luminance when the display unit displays the maximum luminance of the second dynamic range under the intensity of the illumination light set for the illumination unit; and

generating a setting screen used for a user setting of the user set value and making the display unit display the setting screen,

wherein a) the information relating to luminance acquired from the data, b) the user set maximum luminance and c) the maximum display luminance are displayed on the setting screen in a comparable way.