Display device
The present disclosure provides a display device, the display device includes an optical imaging apparatus including an image source element, a beam splitting element, and a reflective element configured to be aligned on light path; and an absorbing element, a shape of the absorbing element and an arrangement position of the absorbing element in the display device cause the absorbing element to absorb non-imaging light in a scene to be displayed, and not block imaging light for generating a display image of the scene to be displayed. In the display device, the absorbing element absorbs the non-imaging light in the scene to be displayed and reduces the non-imaging light in the display device, in turn reduces influence of the non-imaging light on the scene to be displayed and improves display quality of the display image of the scene to be displayed.
1 . A display device, comprising:
an optical imaging apparatus comprising an image source element, a beam splitting element and a reflective element configured to be aligned on a light path, light emitted by the image source element being reflected by the beam splitting element to the reflective element, the light being reflected by the reflective element to the beam splitting element, and the light being transmitted by the beam splitting element, wherein the image source element comprises an image projection area configured to generate and project imaging light for generating a display image in a scene to be displayed and non-imaging light in the scene to be displayed; and
an absorbing element having a shape and an arrangement position in the display device to enable the absorbing element to absorb the non-imaging light, and not block the imaging light,
wherein the absorbing element comprises a first absorbing element attached to an edge portion of the image source element adjacent to a human eye position and extending toward the beam splitting element.
2 . The display device of claim 1 ,
wherein the human eye position and the reflective element are respectively located on both sides of the beam splitting element, and the reflective element reflects the imaging light to the human eye position.
3 . The display device of claim 2 , wherein the first absorbing element is attached to a surface of the beam splitting element, and a surface attachment area on the beam splitting element does not overlap with a coverage area of the imaging light on the beam splitting element.
4 . The display device of claim 3 , wherein an outer edge of the surface attachment area at least partially overlaps with an outer edge of the coverage area, wherein the surface attachment area is an area where the first absorbing element is attached to the surface of the beam splitting element, and the coverage area is an area where the imaging light covers the surface of the beam splitting element.
5 . The display device of claim 2 , wherein a surface of the first absorbing element on a side adjacent to the beam splitting element is parallel to the surface of the beam splitting element, and a surface of the first absorbing element on a side adjacent to the image source element is parallel to a surface of the image source element.
6 . The display device of claim 1 , wherein the absorbing element further comprises a second absorbing element attached to an edge portion of the image source element away from a human eye position and extending toward the beam splitting element,
wherein the human eye position and the reflective element are respectively located on both sides of the beam splitting element, and the reflective element reflects imaging light to the human eye position.
7 . The display device of claim 6 , wherein an edge of an absorbing layer on a side of the second absorbing element adjacent to the beam splitting element is in contact with but does not overlap with an intersection position, the intersection position is defined by that edge imaging light, away from the human eye position, from the imaging light emitted by the image source element intersects edge imaging light in a real scene,
the second absorbing element is configured not to block imaging light for the real scene.
8 . The display device of claim 7 , wherein a surface on a side of the second absorbing element adjacent to an imaging light area for the real scene is parallel to the edge imaging light emitted by the most peripheral position of the image source element in the real scene.
9 . The display device of claim 8 , wherein a surface of the absorbing layer of the second absorbing element is parallel to the edge imaging light, emitted by the most peripheral position of the image source element, most adjacent to the second absorbing element.
10 . The display device of claim 1 , wherein the absorbing element comprises a substrate and an absorbing layer, a surface of the absorbing layer is positioned towards light emitted by the image source element.
11 . The display device of claim 10 , wherein the absorbing layer has a planar structure or a concave structure.
12 . The display device of claim 10 , wherein the absorbing layer has an array formed by microstructures, and recesses are formed between two adjacent microstructures in the array, the microstructures have at least one of a triangular structure, parallelogram structure, trapezoidal structure, and rectangular structure.
13 . The display device of claim 11 , wherein a surface of a planar structure or a concave structure of the absorbing layer has an absorbing coating, and an absorbing wavelength band of the absorbing coating includes at least one of an emission wavelength band of the image source element and an entire visible light wavelength band.
14 . The display device of claim 1 , wherein a distance between an edge of respective absorbing elements adjacent to the beam splitting element and the image source element is configured to range from 1 mm to 90 mm, an included angle, formed by respective absorbing elements and a horizontal plane, facing towards the imaging light is configured to range from 50° to 120°.
15 . The display device of claim 1 , wherein the image source element comprises an aberration corrector configured to correct aberration of imaging light emitted by the image source element and transmit the corrected imaging light to the beam splitting element;
the image source element, the beam splitting element, and the reflective element form one of a composite air-conducting structure and a free-form curved prism system;
the display device is an augmented reality display device, and a display image of the scene to be displayed comprises a virtual scene image and a real scene image.
16 . A display device, comprising:
an optical imaging apparatus comprising:
an image source element configured to emit image light,
a beam splitting element configured to reflect the image light from the image source, and
a reflective element configured to reflect the image light from the beam splitting element back to the beam splitting element and transmit light from the real world to the beam splitting element, the beam splitting element further configured to receive the image light and the light from the real word and transmit the image light and the light from the real word to a human eye position, wherein the image source element comprises an image projection area configured to generate and project imaging light for generating a display image in a scene to be displayed and non-imaging light in the scene to be displayed; and
an absorbing element arranged at an edge portion of the image source element and having a first surface attached to the image source element and a second surface parallel to the beam splitting element, wherein the absorbing element is configured to absorb the non-imaging light, and not block the imaging light,
wherein the absorbing element comprises a first absorbing element attached to the edge portion of the image source element adjacent to a human eye position and extending toward the beam splitting element.
17 . The display device of claim 16 , wherein the absorbing element comprises a substrate and an absorbing layer arranged on a third surface of the absorbing layer, and the absorbing layer is positioned towards the reflective element.
18 . The display device of claim 17 , wherein the display device further comprises another absorbing element arranged at another edge portion of the image source element away from the absorbing element.
19 . The display device of claim 18 , wherein the another absorbing element has a first surface attached to the image source element and a second surface parallel to an edge imaging light emitted by the most peripheral position of the image source element in the real scene.
20 . A display device, comprising:
an optical imaging apparatus comprising:
an image source element configured to emit image light,
a beam splitting element configured to reflect the image light from the image source, and
a reflective element configured to reflect the image light from the beam splitting element back to the beam splitting element and transmit light from the real world to the beam splitting element, the beam splitting element further configured to receive the image light and the light from the real world and transmit the image light and the light from the real world to a human eye position, wherein the image source element comprises an image projection area configured to generate and project imaging light for generating a display image in a scene to be displayed and non-imaging light in the scene to be displayed; and
an absorbing element arranged at an edge portion of the image source element and having a first surface attached to the image source element and a second surface parallel to an edge imaging light emitted by the most peripheral position of the image source element in the real scene, wherein the absorbing element is configured to absorb the non-imaging light, and not block the imaging light,
wherein the absorbing element comprises a first absorbing element attached to the edge portion of the image source element adjacent to a human eye position and extending toward the beam splitting element.