JP-2026514346-A - Display system, head-mounted display, and method

Abstract

The display system comprises an illumination system configured to emit at least partially coherent light, a spatial light modulator SLM illuminated by the illumination system and for applying a modulation pattern to the illumination light, the SLM configured to form a single modulation pattern H that simultaneously represents multiple image fields, wherein the information associated with each of the multiple image fields occupies a different portion of the Fourier transform F(H) of H, an optical system that receives the light modulated by the SLM and is arranged to create a Fourier plane of the SLM, and a spatial filter substantially positioned in the Fourier plane of the SLM, the spatial filter comprising multiple regions, each region corresponding to a portion of F(H) representing an image field, and each region configured to allow light associated with the image field corresponding to that region to pass through. In some examples, in a single modulation pattern, the information associated with the image field having the greatest perceptual significance to the viewer occupies the largest portion of F(H). [Selection Diagram] Figure 1

Inventors

• フィールドハウス， クリスチャン
• ニューマン， アルフレッド ジェームズ
• プリチャード， インディ

Assignees

• ヴィヴィッドキュー リミテッド

Dates

Publication Date

20260511

Application Date

20240322

Priority Date

20230323

Claims (20)

1. A display system, wherein the display system is A lighting system configured to emit at least partially coherent light, A spatial light modulator SLM illuminated by the illumination system and for applying a modulation pattern to the illumination light, wherein the SLM is configured to form a single modulation pattern H that simultaneously represents multiple image fields, and the information associated with each of the multiple image fields occupies a different portion of the Fourier transform F(H) of H, An optical system is provided to receive the light modulated by the SLM and to create a Fourier plane for the SLM. A spatial filter substantially arranged in the Fourier plane of the SLM, wherein the spatial filter comprises a plurality of regions, each region corresponding to a portion of F(H) representing an image field, and each region is configured to allow light related to the image field corresponding to the region to pass through; Equipped with, A display system in which, in the aforementioned single modulation pattern, the information related to the image field having the greatest perceptual significance to the viewer occupies the largest portion of F(H).
2. The display system according to claim 1, wherein each image field is a color channel of the image.
3. The display system according to claim 1 or 2, wherein the plurality of image fields include at least three image fields.
4. The plurality of image fields include a red image field, a green image field, and a blue image field. The display system according to any one of claims 1 to 3, wherein the information related to the green image field occupies the largest portion of F(H).
5. The aforementioned plurality of image fields include a substantially white light field, The display system according to any one of claims 1 to 3, wherein the substantially white light field occupies the largest portion of F(H).
6. The display system according to claim 5, wherein the plurality of image fields further include a red image field, a green image field, and a blue image field.
7. The display system according to claim 6, wherein the information related to the red image field, the information related to the green image field, and the information related to the blue image field occupy portions of F(H) of the same size.
8. The display system according to any one of claims 3 to 7, wherein the plurality of image fields further include a yellow image field.
9. The display system according to any one of claims 3 to 8, wherein the plurality of image fields further include a cyan image field.
10. A display system, wherein the display system is A lighting system configured to emit at least partially coherent light, A spatial light modulator (SLM) for applying a modulation pattern to the illumination light, which is illuminated by the aforementioned illumination system, An optical system is provided to receive the light modulated by the SLM and to create a Fourier plane for the SLM. A spatial filter substantially arranged in the Fourier plane of the SLM, Equipped with, The SLM is configured to form a single modulation pattern H that simultaneously represents at least a first image field occupying a first portion of the Fourier transform F(H) of a single modulation pattern H, and a second image field occupying a different second portion of F(H). A display system in which the spatial filter is configured such that the light corresponding to the first portion of F(H) does not coherently interfere with the light corresponding to the second portion of F(H), or partially coherently interferes with it.
11. The display system according to claim 10, wherein the second portion occupies a larger area F(H) than the first portion.
12. The display system according to claim 10 or 11, wherein the second image field is perceptually more important to the viewer than the first image field.
13. The display system according to any one of claims 10 to 12, wherein at least one of the first image field and the second image field corresponds to a white image field.
14. The single modulation pattern further simultaneously represents a third image field that occupies a third portion of F(H) that is different from the first and second portions, The display system according to any one of claims 10 to 13, wherein the spatial filter is further configured to filter light corresponding to at least the third portion.
15. The single modulation pattern further simultaneously represents a fourth image field that occupies a fourth portion of F(H) that is different from the first portion, the second portion, and the third portion. The spatial filter is further configured to filter out light corresponding to at least the fourth portion, The display system according to claim 14, wherein each of the first image field, the second image field, the third image field, and the fourth image field corresponds to a different color.
16. The display system according to claim 15, wherein one of the first image field, the second image field, the third image field, and the fourth image field corresponds to a white image field.
17. The display system according to any one of claims 14 to 16, wherein the second portion occupies a larger area F(H) than the third portion.
18. The display system according to any one of claims 14 to 17, wherein the first portion corresponds to a red image field, the second portion corresponds to a green image field, and the third portion corresponds to a blue image field.
19. The display system according to claim 18, wherein the first portion occupies a larger area F(H) than the third portion.
20. The second portion corresponds to a white image field, and is a display system according to any one of claims 10 to 17.

Description

This invention relates to a display system, a spatial filter that can be used in a display system, and a method for operating a display system. More specifically, the invention relates to a display system capable of displaying multiple image fields using a single modulation pattern of a modulator. Display systems typically have a refresh rate, expressed in frames per second (Hz), which indicates the number of frames that can be displayed per unit of time. A higher refresh rate, for example, allows for smoother perceived motion. In addition to smoother motion, higher refresh rates can enable other operating modes. For example, in holographic display systems, a higher refresh rate can allow for techniques such as noise averaging and eyebox expansion. The display system should ideally be able to display more image fields per unit of time. This disclosure utilizes the observation that a single modulation pattern on a modulator can encode multiple image fields that target or occupy different parts of a spatial frequency domain, such as the Fourier domain. Throughout this specification, “Fourier domain” refers to the spatial frequency domain of the pattern displayed on the modulator. “Image field” may also be called image information or graphic information. An image field may be, but is not limited to, a 2D image, a 3D image, a hologram, individual views of a 3D scene, multiple or sequential views of a 3D scene, a color channel, an image with a noise profile, an image with additional constraint data, or one of any of the above components. As long as these image fields do not coherently interfere with each other, or have partial coherence, they can all be combined and perceived by the viewer with the human eye without significantly affecting the quality of the perceived image. A spatial filter targeting the region corresponding to the image field in the spatial frequency domain can prevent coherent interference. In this way, it is possible to display two or more image fields on the modulator simultaneously using a single modulation pattern, thereby increasing the number of image fields that can be displayed per unit time. According to a first aspect of the present invention, a display system is provided, comprising: an illumination system configured to emit at least partially coherent light; a spatial light modulator SLM illuminated by the illumination system and for applying a modulation pattern to the illumination light, the SLM configured to form a single modulation pattern H representing multiple image fields simultaneously, wherein the information associated with each of the multiple image fields occupies a different portion of the Fourier transform F(H) of H; an optical system receiving the light modulated by the SLM and arranged to create a Fourier plane of the SLM; and a spatial filter substantially positioned in the Fourier plane of the SLM, the spatial filter comprising multiple regions, each region corresponding to a portion of F(H) representing an image field, and each region configured to allow light associated with the image field corresponding to that region to pass through. In a single modulation pattern, the information associated with the image field having the greatest perceptual significance to the viewer occupies the largest portion of F(H). Generally, the Fourier transform F(H) of H can be divided or decomposed into multiple parts, each representing information from a single image field, and each part is substantially filtered by spatial filters to prevent perceptible interference between that part and the rest for the viewer. Each part corresponds to an independent image field, which can then be coherently added by the eye. Furthermore, by assigning larger portions of F(H) to the image field with the greatest perceptual significance for the viewer, the quality of the perceived image can be improved using the characteristics of the human eye. Please understand that the information associated with each image field in F(H) does not necessarily need to precisely correspond to the Fourier transform of the image field, for example, by performing possible cropping and/or adding focal terms. Individual regions of a spatial filter may overlap. For example, due to wavelength-dependent diffraction effects, regions in a spatial filter may overlap each other. The color of the spatial filter may differ where regions overlap; for example, if a red region overlaps with a green region, the overlap may appear yellow. References to light in the image field corresponding to the regions of the spatial filter include such arbitrary overlaps; for example, a red region may include a portion of the spatial filter that appears red and a portion of the spatial filter that appears yellow where the red region overlaps with the green region. The reference to a spatial filter, configured to "allow light to pass through," is used in the sense of a filter with respect to light that may pass through downstream optical elemen