Near-eye display device, augmented reality apparatus and virtual reality apparatus
Provided is a near-eye display device including: a base substrate including first and second surfaces opposite to each other, an optical element array on the first surface, and a pixel island array and a sensor array that are on the second surface and are coupled to each other. The pixel island array emits first pixel light to the optical element array, such that the first pixel light passes through the optical element array and then reaches a human eye. The sensor array receives light of the first pixel light reflected by the human eye, determines a position of a pupil center of the human eye according to an intensity distribution of the reflected light, determines pixels corresponding to the position of the pupil center in the pixel island array, and controls the pixels to emit second pixel light.
1. A near-eye display device, comprising a base substrate, a pixel island array, an optical element array, and a sensor array; wherein
the base substrate comprises a first surface and a second surface opposite to each other, the optical element array is on the first surface, the pixel island array and the sensor array are on the second surface, and the sensor array and the pixel island array are coupled to each other;
the pixel island array is configured to emit first pixel light to the optical element array, such that the first pixel light passes through the optical element array and then reaches a human eye; and
the sensor array is configured to receive reflected light of the first pixel light reflected by the human eye, determine a position of a pupil center of the human eye according to an intensity distribution of the reflected light, determine pixels corresponding to the position of the pupil center in the pixel island array, and control the pixels to emit second pixel light;
wherein the pixel island array comprises a plurality of pixel islands, the optical element array comprises a plurality of optical elements, the sensor array comprises a plurality of light sensors, the plurality of pixel islands of the pixel island array are in one-to-one correspondence with the plurality of optical elements of the optical element array, the plurality of pixel islands of the pixel island array are in one-to-one correspondence with the plurality of light sensors of the sensor array, and each of the plurality of light sensors is coupled to a corresponding pixel island; and
wherein each of the plurality of optical elements has a viewing angle θ and a focal length f, each of the plurality of pixel islands has a size D in a direction parallel to the second surface, and θ=arctan(D/f).
2. The near-eye display device according to claim 1 , wherein each of the plurality of light sensors is in contact with the corresponding pixel island.
3. The near-eye display device according to claim 1 , wherein a center of each of the plurality of optical elements, a center of the pixel island corresponding to the optical element, and a center of the human eye are on a same straight line.
4. The near-eye display device according to claim 1 , wherein each of the plurality of pixel islands is within one focal length of a corresponding optical element.
5. The near-eye display device according to claim 1 , wherein each of the plurality of optical elements is a microlens.
6. The near-eye display device according to claim 1 , wherein a material of each of the plurality of optical elements comprises polymethyl methacrylate.
7. The near-eye display device according to claim 1 , wherein each of the plurality of pixel islands comprises a plurality of pixels, each of the plurality of light sensors is configured to determine a plurality of target pixels corresponding to the position of the pupil center from the plurality of pixels of a corresponding pixel island, and to control the plurality of target pixels to emit the second pixel light.
8. The near-eye display device according to claim 1 , wherein the optical element array is configured to form an enlarged virtual image at a same virtual image plane by using the first pixel light, and the virtual image plane is in a space close to the second surface.
9. The near-eye display device according to claim 1 , wherein a material of the base substrate comprises at least one of polymethyl methacrylate and silicon nitride.
10. The near-eye display device according to claim 1 , wherein a distance between the human eye and the base substrate is L, a distance d1 is provided between any adjacent two of the plurality of optical elements, and d1=L×tanθ.
11. The near-eye display device according to claim 1 , wherein a distance between the human eye and the base substrate is L, a distance d2 is provided between any adjacent two of the plurality of pixel islands, and d2=(L+f)×tanθ.
12. The near-eye display device according to claim 1 , wherein a plurality of pixels of each of the plurality of pixel islands emit light of a same color, and different ones of the plurality of pixel islands emit light of different colors.
13. A wearable augmented reality apparatus, comprising the near-eye display device according to claim 1 .
14. The augmented reality apparatus according to claim 13 , wherein
the pixel island array comprises a plurality of pixel islands, a first gap is provided between any adjacent two of the plurality of pixel islands, and is configured to transmit ambient light; and
the optical element array comprises a plurality of optical elements, a second gap is provided between any adjacent two of the plurality of optical elements, and is configured to transmit the ambient light.
15. The augmented reality apparatus according to claim 14 , wherein each of the plurality of optical elements is a microlens having a diameter greater than or equal to 0.5 millimeters and less than or equal to 1.2 millimeters.
16. A wearable virtual reality apparatus, comprising the near-eye display device according to claim 1 .
17. The virtual reality apparatus according to claim 16 , wherein the optical element array of the near-eye display device comprises a plurality of optical elements, and each of the plurality of optical elements is a microlens, which has a diameter greater than or equal to 0.5 millimeters and less than or equal to 2 millimeters.