Display module and display device
A display module includes a display element, a light-guiding optical device, and a control unit configured to perform distortion correction including correction of a chromatic aberration of magnification. The light-guiding optical device is constituted of an optical system having non-axisymmetry in an up-and-down direction with respect to the imaging light entering the light-guiding optical device, and includes a first optical member having positive refractivity, a second optical member having positive refractivity, and a first reflection surface configured to reflect the imaging light toward a pupil position. The refractivity of the first optical member is greater than the refractivity of the second optical member. An abbe number of a constituent material of the first optical member is greater than an abbe number of a constituent material of the second optical member. The control unit performs distortion correction by a different distortion correction amount for each color light.
1. A display module, comprising:
a display element configured to emit imaging light including first color light and second color light different from the first color light;
a light-guiding optical device configured to guide the imaging light emitted from the display element; and
a processor configured to perform distortion correction including correction of a chromatic aberration of magnification for an image displayed on the display element, wherein
the light-guiding optical device is constituted of an optical system having non-axisymmetry in an up-and-down direction with respect to the imaging light entering the light-guiding optical device,
the light-guiding optical device includes
a first optical member having positive refractivity,
a second optical member having positive refractivity, and
a first reflection surface configured to reflect the imaging light toward a pupil position, the imaging light being emitted from the second optical member,
the refractivity of the first optical member is greater than the refractivity of the second optical member,
an abbe number of a constituent material of the first optical member is greater than an abbe number of a constituent material of the second optical member, and
the processor performs distortion correction by a different distortion correction amount for each of the first color light and the second color light.
2. The display module according to claim 1 , wherein
a distortion correction amount at a first position, in an up-and-down direction of an image displayed on the display element, is greater than a distortion correction amount at a second position lower than the first position.
3. The display module according to claim 1 , wherein
an intermediate image is formed in an optical path of the imaging light in the light-guiding optical device, and
the first optical member and the second optical member are arranged between the display element and an intermediate image, of the intermediate image, formed by the imaging light emitted from a center pixel of the display element.
4. The display module according to claim 1 , further comprising
a second reflection surface configured to reflect the imaging light, wherein
the first optical member and the second optical member are arranged between the display element and the second reflection surface.
5. The display module according to claim 4 , wherein
the first optical member is constituted of a prism including an inner reflection surface functioning as the second reflection surface, and
the second optical member is arranged between the display element and the prism.
6. The display module according to claim 1 , wherein
the light-guiding optical device is constituted of an optical system having axisymmetry in a right-and-left direction.
7. A display device, comprising the display module according to claim 1 .
8. A display module, comprising:
a display element configured to emit imaging light including first color light and second color light different from the first color light;
a light-guiding optical device configured to guide the imaging light emitted from the display element; and
a processor configured to perform distortion correction including correction of a chromatic aberration of magnification for an image displayed on the display element, wherein
the light-guiding optical device is constituted of an optical system having non-axisymmetry in an up-and-down direction with respect to the imaging light entering the light-guiding optical device,
the light-guiding optical device includes
a first optical member having positive refractivity,
a second optical member having positive refractivity, and
a first reflection surface configured to reflect the imaging light toward a pupil position, the imaging light being emitted from the second optical member,
the refractivity of the first optical member is greater than the refractivity of the second optical member,
an abbe number of a constituent material of the first optical member is greater than an abbe number of a constituent material of the second optical member, and
the processor performs distortion correction by a same distortion amount for the first color light and the second color light, and displays images corresponding to the first color light and the second color light subjected to the distortion correction at display positions shifted according to a first correction image signal and a second image correction signal output by the processor, respectively.
9. The display module according to claim 8 , wherein
the imaging light includes red imaging light, green imaging light, and blue imaging light, and
the processor shifts the display positions of the images corresponding to the first color light and the second color light so that, in an up-and-down direction of the image displayed on the display element, a red image formed by the red imaging light is positioned upward and a blue image formed by the blue imaging light is positioned downward with respect to a green image formed by the green imaging light.