US-12619137-B2 - Display system

US12619137B2US 12619137 B2US12619137 B2US 12619137B2US-12619137-B2

Abstract

A display system is provided. The display system includes a picture generation unit, a diffuser screen, and a curved mirror. The picture generation unit is configured to generate a real image and perform imaging on the diffuser screen. The diffuser screen is configured to perform diffuse reflection on the real image. The curved mirror is configured to perform imaging based on the real image obtained through diffuse reflection, to generate a magnified virtual image.

Inventors

Lei Mao
Xiao Li
Zhiyong Huang
Shimao Li
Zhentao Qin

Assignees

Shenzhen Yinwang Intelligent Technologies Co., Ltd.

Dates

Publication Date: 20260505
Application Date: 20230629
Priority Date: 20201231

Claims (19)

1 . A display system, comprising: a picture generation unit; a diffuser screen; a curved mirror; and a reflector configured to receive a light beam for imaging on the curved mirror and reflect the light beam back to the curved mirror, wherein the curved mirror is further configured to receive the light beam reflected by the reflector, to perform magnification imaging, wherein the picture generation unit is configured to generate a real image and perform imaging on the diffuser screen, wherein the diffuser screen is configured to perform diffuse reflection on the real image, and wherein the curved mirror is configured to perform imaging based on the real image obtained through diffuse reflection, to generate a magnified virtual image.
2 . The display system according to claim 1 , wherein the picture generation unit comprises: a light source configured to emit light beams; a prism configured to combine light beams emitted by the light source; a lens configured to collimate a combined light beam and direct the combined light beam to an imaging chip that is configured to generate the real image; and a projection lens configured to project the real image onto the diffuser screen.
3 . The display system according to claim 2 , wherein the picture generation unit further comprises a first diffractive optical element, the first diffractive optical element is located between the light source and the prism, and the first diffractive optical element is configured to split the light beams emitted by the light source.
4 . The display system according to claim 2 , wherein the picture generation unit further comprises a polarization processing element, and the polarization processing element is configured to adjust a polarization state of the light beam directed to the imaging chip.
5 . The display system according to claim 4 , wherein the polarization processing element is any one of the following elements: a polarization beam splitter (PBS), a quarter-wave plate, a half-wave plate, a polarizer, or a rotator.
6 . The display system according to claim 1 , further comprising: a polarization film, wherein the polarization film is placed after the diffuser screen, and the polarization film is configured to filter out interference light.
7 . The display system according to claim 1 , further comprising: a black-and-white grating, a cylindrical lens array, or a microlens array, wherein the black-and-white grating, the cylindrical lens array, or the microlens array is located after the diffuser screen.
8 . The display system according to claim 1 , wherein the picture generation unit comprises a light source comprising a plurality of primary-color sub-light sources.
9 . The display system according to claim 8 , wherein the picture generation unit further comprises a first diffractive optical element, the first diffractive optical element comprises a plurality of sub-optical elements, and the plurality of sub-optical elements are separately placed before the plurality of primary-color sub-light sources.
10 . The display system according to claim 1 , wherein the diffuser screen is a reflection diffuser screen or a projection diffuser screen.
11 . The display system according to claim 1 , further comprising: a diffuser film, located on a light-emitting side of the diffuser screen, wherein the diffuser film is configured to expand a transverse scattering angle of the real image obtained through diffuse reflection.
12 . The display system according to claim 1 , further comprising: a cylindrical lens array disposed on a light-emitting side of the diffuser screen and covering pixels of the diffuser screen.
13 . A display system comprising: a picture generation unit comprising: a light source configured to emit light beams; a prism configured to combine light beams emitted by the light source; a lens configured to collimate a combined light beam and direct the combined light beam to an imaging chip configured to generate the real image; and a projection lens configured to project the real image onto the diffuser screen; a diffuser screen; a curved mirror; and a second diffractive optical element that is located after the curved mirror, and is configured to split a light beam reflected by the curved mirror, wherein the picture generation unit is configured to generate a real image and perform imaging on the diffuser screen, wherein the diffuser screen is configured to perform diffuse reflection on the real image, and wherein the curved mirror is configured to perform imaging based on the real image obtained through diffuse reflection, to generate a magnified virtual image.
14 . A display system comprising: a picture generation unit; a diffuser screen; a curved mirror; and a Fresnel lens placed after the diffuser screen, wherein the Fresnel lens is configured to magnify a real image passing through the diffuser screen, wherein the picture generation unit is configured to generate the real image and perform imaging on the diffuser screen, wherein the diffuser screen is configured to perform diffuse reflection on the real image, and wherein the curved mirror is configured to perform imaging based on the real image obtained through diffuse reflection, to generate a magnified virtual image.
15 . A display system comprising: a picture generation unit; a diffuser screen; a curved mirror; and a cylindrical lens array disposed on a light-emitting side of the diffuser screen and covering pixels of the diffuser screen, wherein the picture generation unit is configured to generate a real image and perform imaging on the diffuser screen, wherein the diffuser screen is configured to perform diffuse reflection on the real image, and wherein the curved mirror is configured to perform imaging based on the real image obtained through diffuse reflection, to generate a magnified virtual image, and wherein at least one cylindrical lens in the cylindrical lens array covers at least two columns of pixels of the diffuser screen.
16 . The display system according to claim 15 , wherein the at least one cylindrical lens in the cylindrical lens array covers three columns of pixels of the diffuser screen.
17 . The display system according to claim 15 , wherein a plurality of pixel columns covered by the at least one cylindrical lens in the cylindrical lens array separately display different pictures.
18 . A display system comprising: a picture generation unit; a diffuser screen; a curved mirror; and a first reflection element, located on an optical path between the picture generation unit and the diffuser screen, wherein the picture generation unit is configured to generate a real image and perform imaging on the diffuser screen, wherein the diffuser screen is configured to perform diffuse reflection on the real image, and wherein the curved mirror is configured to perform imaging based on the real image obtained through diffuse reflection, to generate a magnified virtual image wherein the first reflection element is configured to reflect, to the diffuser screen, the real image generated by the picture generation unit.
19 . A display system comprising: a picture generation unit; a diffuser screen; a curved mirror; and a second reflection element, wherein the picture generation unit is configured to generate a real image and perform imaging on the diffuser screen, wherein the diffuser screen is configured to perform diffuse reflection on the real image, and wherein the curved mirror is configured to perform imaging based on the real image obtained through diffuse reflection, to generate a magnified virtual image, wherein the second reflection element is located on an optical path between the curved mirror and the diffuser screen, and wherein the second reflection element is configured to reflect, to the curved mirror, the real image obtained through diffuse reflection by the diffuser screen.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2021/139419, filed on Dec. 18, 2021, which claims priority to Chinese Patent Application No. 202011641286.3, filed on Dec. 31, 2020 and Chinese Patent Application No. 202110898215.X, filed on Aug. 5, 2021. All of the aforementioned patent applications are hereby incorporated by reference in their entireties. TECHNICAL FIELD This application relates to the field of picture display, and in particular, to a display system. BACKGROUND Currently, a large-screen display system (for example, a display backplane with a size of at least 80 inches) is expensive. A laser TV can achieve a projection effect of at least 100 inches, but requires a curtain (a Fresnel screen) having a specific function to improve viewing experience, and occupies large space. An existing projector usually requires a large projection distance, cannot generate a magnified picture at a short distance, and has a high requirement on ambient brightness. SUMMARY In view of this, an embodiment of this application provides a display system. According to a first aspect, an embodiment of this application provides a display system, where the display system includes a picture generation unit, a diffuser screen, and a curved mirror. The picture generation unit is configured to generate a real image and perform imaging on the diffuser screen. The diffuser screen is configured to perform diffuse reflection on the real image. The curved mirror is configured to perform imaging based on the real image obtained through diffuse reflection, to generate a magnified virtual image. In a possible implementation, the picture generation unit includes a light source, a prism, a lens, an imaging chip, and a projection lens. The light source is configured to emit a light beam. The prism is configured to combine light beams emitted by the light source. The lens is configured to collimate a combined light beam and direct the combined light beam to the imaging chip. The imaging chip is configured to generate the real image. The projection lens is configured to project the real image onto the diffuser screen. In a possible implementation, the picture generation unit includes a first diffractive optical element, the diffractive optical element is located between the light source and the prism, and the diffractive optical element is configured to split a light beam emitted by the light source. In a possible implementation, the display system further includes a second diffractive optical element, the diffractive optical element is located after the curved mirror, and the diffractive optical element is configured to split a light beam reflected by the curved mirror. In a possible implementation, the display system further includes a polarization film, where the polarization film is placed after the diffuser screen, and the polarization film is configured to filter out interference light. In a possible implementation, the display system further includes a Fresnel lens. The Fresnel lens is placed after the diffuser screen, and the Fresnel lens is configured to magnify the real image passing through the diffuser screen. In a possible implementation, the display system further includes a black-and-white grating, a cylindrical lens array, or a microlens array, where the black-and-white grating, the cylindrical lens array, or the microlens array is located after the diffuser screen. In a possible implementation, the picture generation unit further includes a polarization processing element, and the polarization processing element is configured to adjust a polarization state of the light beam directed to the imaging chip. In a possible implementation, the display system further includes a reflector, where the reflector is configured to receive the light beam for imaging on the curved mirror and reflect the light beam back to the curved mirror, and the curved mirror is further configured to receive the light beam reflected by the reflector, to perform magnification imaging. In a possible implementation, the light source includes a plurality of primary-color sub-light sources. In a possible implementation, the first diffractive optical element includes a plurality of sub-optical elements, and the sub-optical elements are separately placed before a plurality of primary-color sub-light sources. In a possible implementation, the diffuser screen is a reflection diffuser screen or a projection diffuser screen. In a possible implementation, the polarization processing element is any one of the following elements: a polarization beam splitter PBS, a quarter-wave plate, a half-wave plate, a polarizer, and a rotator. In a possible implementation, the curved mirror is a multi-focus curved mirror. This application provides a display system. The display system may be used in various scenarios in which pictures need to be magnified, and can implement magnification imaging at a short distan