CN219936207U - Lighting assembly, display optical machine and near-to-eye display equipment - Google Patents

Abstract

The utility model relates to an illumination assembly, a display optical machine and near-eye display equipment. The illumination assembly comprises an illumination light source, a uniform light color mixing device and a relay assembly, and comprises a substrate, a first light emitting element, a second light emitting element and a third light emitting element, wherein the first light emitting element, the second light emitting element and the third light emitting element are arranged on the substrate; the uniform light and color mixing device is arranged on the light emitting side of the illumination light source and is used for shaping and homogenizing multicolor illumination light rays emitted by the first light emitting element, the second light emitting element and the third light emitting element to form mixed color illumination light; the relay component is arranged on the light emitting side of the dodging and color mixing device and is used for transmitting the color mixing illumination light from the dodging and color mixing device to the display chip to be modulated into image light. The utility model can realize the uniform light and color mixing treatment of the multicolor illumination light source without depending on the conventional color combining devices like the conventional dichroic mirrors and the like.

Description

Lighting assembly, display optical machine and near-to-eye display equipment

Technical Field

The utility model relates to the technical field of near-eye display, in particular to an illumination assembly, a display optical machine and near-eye display equipment.

Background

With the continuous development of new display technologies in recent years, the related market of wearable display devices (such as AR glasses) is mature, and currently, among various schemes in the near-to-eye display field, the main scheme is not lack of various forms such as BB, free-form surface prism, array optical waveguide and diffraction optical waveguide, wherein the AR display module based on the waveguide scheme is focused and adopted widely because of the advantages of small and light volume, good experience and the like. Currently, the mainstream waveguide display schemes include LCoS, LCD, DLP, etc., and since the display chips are not self-luminous, a corresponding illumination system is required to be matched with the display chips. In the full-color display illumination scheme in the micro-display field, in order to obtain better color performance and wider color gamut, a manner of combining colors by using R, G, B three paths of light and matching CS (Color Sequential) timing circuits is widely adopted.

For the traditional optical machine, when the light source is a multicolor illumination light source, a traditional dichroic mirror and other conventional color combining devices are matched to realize the color combination of RGB three-color light. And the full-color display optical scheme based on color time sequence is commonly used for realizing the color combination of RGB three-color light by a dichroic mirror.

The dichroic mirror is characterized by almost completely transmitting light of a certain wavelength and almost completely reflecting light of other wavelengths, and combining light of different directions at a desired direction by reflection or projection to achieve a color combining effect. However, the angle deviation of the color combining device processing and assembling, or the difference of the reflectivity or transmittance of the dichroic mirror under the corresponding different wavelengths and different light angles, especially when the light angle distribution range is large and the spectrum range is wide, the corresponding color combining effect is obviously affected.

Disclosure of Invention

Accordingly, in order to solve the above-mentioned problems, it is necessary to provide an illumination module, a display light machine and a near-to-eye display device, which can perform the light homogenizing and color mixing treatment on a multicolor illumination light source without relying on a conventional color combining device like a conventional dichroic mirror.

The disclosed embodiments provide an illumination assembly for providing mixed color illumination light for a display chip, comprising:

the illumination light source comprises a substrate, a first light-emitting element, a second light-emitting element and a third light-emitting element, wherein the first light-emitting element, the second light-emitting element and the third light-emitting element are arranged on the substrate;

the uniform light color mixing device is arranged on the light emitting side of the illumination light source and is used for shaping and homogenizing multicolor illumination light rays emitted by the first light emitting element, the second light emitting element and the third light emitting element to form the color mixing illumination light; and

and the relay component is arranged on the light emitting side of the dodging color mixing device and is used for transmitting the color mixing illumination light from the dodging color mixing device to the display chip so as to be modulated into image light.

The illumination assembly that this disclosed embodiment provided, first luminescent element, second luminescent element and third luminescent element lay in the base plate can provide polychromatic illumination light, and even light colour mixture device sets up the light-emitting side at illumination light source, can be with this polychromatic illumination light plastic and homogenization in order to form colour mixture illumination light, can guarantee fine colour mixture effect when omitting traditional colour mixture device. On one hand, the whole space can be compressed, and certain cost can be saved; on the other hand, the color cast phenomenon caused by assembly tolerance similar to the traditional dichroic mirror color combination scheme can be avoided.

In one embodiment, the dodging color mixing device is a micro lens array or a binary optical device. In one embodiment, the number of the light homogenizing and color mixing devices is plural, and the plural light homogenizing and color mixing devices are stacked in an optical path between the illumination light source and the relay assembly.

Thus, a plurality of light homogenizing and color mixing devices are superposed in the light path between the illumination light source and the relay assembly, so that the respective color distributions of the formed mixed-color illumination light can be more uniform.

In one embodiment, the illumination light source is one of an RGBW four-in-one light source, an RGGB four-in-one light source, and an RGB three-in-one light source. In one embodiment, the incidence angle distribution range of the relay component is smaller than the maximum overlapping area range of the light rays with different colors in the mixed-color illumination light.

So arranged, the respective color distributions of the mixed-color illumination light are more uniform within this interval.

In one embodiment, the dodging color mixing device supports an angular distribution range that is greater than a maximum value of the angular distribution range of the polychromatic illumination light.

The angle distribution range supported by the dodging color mixing device can contain the angle distribution range of each color in the multicolor illumination light, and can avoid the phenomenon of smear in a large area.

In one embodiment, the relay assembly includes a BS prism, a first relay lens, and a collimating lens, where the BS prism is disposed in a light path between the first relay lens and the light homogenizing and color mixing device, and the collimating lens is disposed in a light path between the illumination light source and the light homogenizing and color mixing device.

So configured, the BS prism is disposed in an optical path between the first relay lens and the dodging color mixing device for transmitting the color mixing illumination light to the display chip to be modulated into image light.

In one embodiment, the relay assembly includes a polarizer, a PBS prism, a first relay lens, a quarter wave plate, and a curved mirror, wherein the polarizer is disposed in a light path between the illumination light source and the PBS prism, the first relay lens and the curved mirror are disposed on opposite sides of the PBS prism, respectively, and the quarter wave plate is disposed in a light path between the PBS prism and the curved mirror.

The display chip modulates and converts the S polarized light into P polarized light, transmits the P polarized light to the quarter wave plate through the PBS prism, and transmits the P polarized light to the quarter wave plate through the quarter wave plate, and then the quarter wave plate converts the P polarized light into S polarized light, and finally transmits the S polarized light to the imaging lens through the PBS prism.

In one embodiment, the relay assembly includes a turning prism, a second relay lens and a collimating lens, the turning prism is disposed between the illumination light source and the optical path of the polarizer, the second relay lens is disposed in the optical path between the turning prism and the polarizer, and the collimating lens is disposed in the optical path between the illumination light source and the light homogenizing and color mixing device.

So configured, the turning prism cooperates with the second relay lens to transmit the mixed illumination light from the dodging color mixing device to the PBS prism.

In one embodiment, the illumination assembly includes a collimating lens disposed between the illumination source and the optical path of the light homogenizing and color mixing device.

According to another aspect of the present utility model, there is further provided a display light machine, including:

a lighting assembly as claimed in any one of the preceding claims;

an imaging lens; and

and the display chip is arranged in the light path between the illumination assembly and the imaging lens and is used for modulating the mixed color illumination light from the illumination assembly into image light so as to modulate imaging through the imaging lens.

By the arrangement, the display chip can modulate mixed-color illumination light from the illumination component into image light and image the image through the modulation of the imaging lens, and the imaging effect is excellent.

According to another aspect of the present utility model, there is further provided a near-eye display device including:

an equipment body; and

the display light machine of any one of the above, wherein the display light machine is mounted on the device body.

Drawings

FIG. 1 is a schematic diagram of a first embodiment of a light engine according to the present utility model;

FIG. 2 is a schematic diagram of a second embodiment of the optical engine shown in FIG. 1;

FIG. 3 is a schematic distribution diagram of a first embodiment of each color of the illumination source according to the present utility model;

FIG. 4 is a schematic distribution diagram of a second embodiment of each color of illumination sources according to the present utility model;

FIG. 5 is a schematic distribution diagram of a third embodiment of each color of illumination sources according to the present utility model;

FIG. 6 is an angular distribution of first light emitting elements at an observation plane A of the light homogenizing and color mixing device based on FIG. 5;

FIG. 7 is an angular distribution of a second light emitting element at an observation plane A of the light homogenizing and color mixing device based on FIG. 5;

FIG. 8 is an angular distribution of a third light emitting element at an observation plane A of the light homogenizing and color mixing device based on FIG. 5;

FIG. 9 is an angular distribution of a first illuminant at an observation plane B of the light homogenizing and color mixing device based on FIG. 5;

FIG. 10 is an angular distribution of a second illuminant at an observation plane B of the light homogenizing and color mixing device based on FIG. 5;

FIG. 11 is an angular distribution of a third illuminant at an observation plane B of the light homogenizing and color mixing device based on FIG. 5;

FIG. 12 is a partial angle distribution of the first illuminant of FIG. 9;

FIG. 13 is a partial angle distribution of the second illuminant of FIG. 9;

FIG. 14 is a partial angle distribution of the third illuminant of FIG. 9;

fig. 15 is an angular distribution of a first light emitting member at a viewing surface C of the light homogenizing and color mixing device based on fig. 5;

fig. 16 is an angular distribution of a second illuminant at an observation plane C of the light homogenizing and color mixing device based on fig. 5;

FIG. 17 is an angular distribution of a third illuminant at the viewing surface C of the light homogenizing and color mixing device of FIG. 5;

FIG. 18 is a uniform distribution of the light sources of the colors based on FIG. 5 in the overlap region;

fig. 19 is a comparison of the light sources of the respective colors of fig. 18 in the overlapping region.

The main components conform to the description:

10. an illumination light source; 11. a substrate; 12. a first light emitting element; 13. a second light emitting element; 14. a third light emitting element; 15. a fourth light emitting element; 20. a dodging color mixing device; 30. a relay assembly; 31. BS prism; 32. a first relay lens; 33. a polarizing plate; 34. a PBS prism; 35. a quarter wave plate; 36. a curved mirror; 37. turning the prism; 38. a second relay lens; 40. a collimating lens; 50. a display chip; 60. an imaging lens; 61. an exit pupil plane.

The foregoing main elements are consistent with the description of the utility model in further detail with reference to the accompanying drawings and detailed description.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

For the conventional display light machine, when the light source is the multicolor illumination light source 10, a conventional color combining device such as a conventional dichroic mirror is required to realize color mixing of the three colors of RGB. However, the dichroic mirror has a great influence on the color combining effect, whether it is limited by the angle deviation of the color combining device or the difference of the corresponding reflectivity or transmittance of the dichroic mirror at different wavelengths and different light angles.

Referring to fig. 1 to 19, based on the above technical problems, the present utility model provides an illumination assembly, a display light machine and a near-eye display device, which can perform light and color mixing treatment on a multi-color illumination light source 10 without relying on conventional color combining devices like conventional dichroic mirrors.

Specifically, referring to fig. 1 and 2, the present embodiment provides a display light machine, which includes an illumination assembly, an imaging lens 60 and a display chip 50; the display chip 50 is disposed in an optical path between the illumination assembly and the imaging lens 60 for modulating the mixed-color illumination light from the illumination assembly into image light for modulated imaging via the imaging lens 60. It is to be appreciated that the imaging lens 60 has an exit pupil plane 61.

So configured, the display chip 50 is capable of modulating the mixed-color illumination light from the illumination assembly into image light and imaging via the imaging lens 60 modulation, with excellent imaging effect. The traditional color combining device is omitted, the space is compressed, and the cost is also more advantageous. Therefore, the display optical machine has more compact structure, portability and small size.

Currently, among various schemes in the near-to-eye display field, the main stream scheme is not lack of various forms such as BB, free-form surface prisms, array optical waveguides and diffraction optical waveguides, wherein the AR display module based on the waveguide scheme is widely focused and adopted due to the advantages of small and light volume, good experience and the like. Currently, among waveguide-based display schemes, LCoS, LCD, DLP, and the like are the mainstream schemes. In any of the above display chips 50, it is not self-luminous, and therefore a corresponding illumination system is required for use.

Referring to fig. 1, the embodiment of the disclosure provides an illumination assembly for providing mixed color illumination light to a display chip 50, including an illumination light source 10, a uniform color mixing device 20 and a relay assembly 30, including a substrate 11, a first light emitting element 12, a second light emitting element 13 and a third light emitting element 14, wherein the first light emitting element 12, the second light emitting element 13 and the third light emitting element 14 are disposed on the substrate 11; the dodging color mixing device 20 is disposed on the light emitting side of the illumination source 10, and is used for shaping and homogenizing the multicolor illumination light emitted by the first light emitting element 12, the second light emitting element 13 and the third light emitting element 14 to form the color mixed illumination light; the relay assembly 30 is disposed on the light emitting side of the light homogenizing and color mixing device 20, and is configured to transmit the color-mixed illumination light from the light homogenizing and color mixing device 20 to the display chip 50 to be modulated into image light. In the present embodiment, the first light emitting element 12, the second light emitting element 13, and the third light emitting element 14 represent three different colors of light, specifically, the first light emitting element 12 represents red light (R), the second light emitting element 13 represents green light (G), and the third light emitting element 14 represents blue light (B).

According to the lighting assembly provided by the embodiment of the disclosure, the first light-emitting element 12, the second light-emitting element 13 and the third light-emitting element 14 are arranged on the substrate 11, multicolor lighting rays can be provided, the dodging color mixing device 20 is arranged on the light emitting side of the lighting source 10, the multicolor lighting rays can be shaped and homogenized to form color mixing lighting rays, and a good color mixing effect can be ensured while a traditional color mixing device is omitted. On one hand, the whole space can be compressed, and certain cost can be saved; on the other hand, the color cast phenomenon caused by assembly tolerance similar to the traditional dichroic mirror color combination scheme can be avoided.

It should be noted that, for the conventional display light machine, when the light source is the multicolor illumination light source 10, a conventional color combining device such as a conventional dichroic mirror is required to achieve color mixing of the RGB three-color light, wherein the color combining effect is greatly affected no matter the color combining device is limited by the angle deviation of processing and assembling or the difference of the corresponding reflectivity or transmittance of the dichroic mirror under different wavelengths and different light angles.

It should be explained that the dichroic mirror is characterized by almost completely transmitting light of a certain wavelength and almost completely reflecting light of other wavelengths, and combining light of different directions in a desired direction by reflection or projection to achieve a color combining effect. In this embodiment, the light-homogenizing color-mixing device 20 realizes color mixing on the basis of color homogenization, specifically, the first light-emitting element 12, the second light-emitting element 13 and the third light-emitting element 14 are arranged on the substrate 11 to provide multicolor illumination light on the same reference plane, the light-homogenizing color-mixing device 20 is arranged on the light-emitting side of the illumination light source 10, and can shape and homogenize the multicolor illumination light to form color-mixing illumination light, so that a good color-mixing effect can be ensured while omitting a traditional color-mixing device.

Specifically, the illumination assembly includes a collimating lens 40 disposed between the illumination source 10 and the optical path of the light homogenizing and color mixing device 20. In this embodiment, the collimating lens 40 is preferably but not limited to a monolithic aspheric lens or a TIR collimating lens, and the collimating lens 40 is made of an anti-ultraviolet yellowing material, so that the structure is compact and the cost is controllable.

Further, the relay assembly 30 combines the illumination path and the imaging path to facilitate further compression of the size and volume of the display light engine.

In some embodiments, the light homogenizing and color mixing device 20 is a microlens array or binary optical device. It should be appreciated that the particular form of the light homogenizing and color mixing device 20 is not limited to a microlens array, binary optics, or other micro-optics, etc., as long as the light angle distribution can be shaped and homogenized. Furthermore, the processing or implementation of the dodging color mixing device 20 is not limited to the processing forms such as WLG (wafer level optical glass lens, aspheric surface printed on glass using special glue before wafer dicing), WLO (wafer level optical element) or NIL (nanoimprint technology).

In other embodiments, the number of light homogenizing and color mixing devices 20 is plural, and the plural light homogenizing and color mixing devices 20 are stacked in the optical path between the illumination light source 10 and the relay assembly 30. Thus, a plurality of light homogenizing and color mixing devices 20 are stacked in the optical path between the illumination light source 10 and the relay assembly 30, so that the respective color distributions of the formed mixed-color illumination light can be made more uniform.

It should be noted that, since the number of the light homogenizing and color mixing devices 20 is plural, the light homogenizing and color mixing devices 20 located at the upper layer perform the first shaping and homogenizing treatment on the polychromatic illumination light of the first light emitting element 12, the second light emitting element 13 and the third light emitting element 14, and the light homogenizing and color mixing devices 20 located at the lower layer perform the further shaping and homogenizing treatment on the polychromatic illumination light which has been shaped and homogenized once, so as to form the mixed color illumination light.

Referring to fig. 3 to 5, in some embodiments, the illumination light source 10 is one of an RGBW four-in-one light source, an RGGB four-in-one light source, and an RGB three-in-one light source. It should be noted that in the above embodiment, R represents red, G represents green, B represents blue, and W represents white.

Specifically, fig. 3 shows an RGB three-in-one light source, which corresponds to the first light emitting element 12, the second light emitting element 13, and the third light emitting element 14, respectively.

In some embodiments, the illumination source 10 further comprises a fourth light emitting element 15 arranged on the substrate 11, wherein the fourth light emitting element 15 is represented as white. Fig. 4 shows an RGBW four-in-one light source, which corresponds to a first light emitting element 12, a second light emitting element 13, a third light emitting element 14, and a fourth light emitting element 15, respectively.

Referring specifically to fig. 5, an LED light source based on an RGGB arrangement is selected in this embodiment, and is matched with 4: the rectangular LcoS display chip 50 of 3 aspect ratio expands the relevant description of the scheme, in which the number of first light emitting elements 12 is one, the number of second light emitting elements 13 is two, and the number of third light emitting elements 14 is one. Specific embodiments will be described below based on an RGGB arrangement of LED light sources.

As can be appreciated, the dodging color mixing device 20 shapes the angular distribution of the illumination light of each color: the shape of the angular distribution after shaping needs to be matched with the shape and proportion of the display chip 50 to avoid the waste of the angular transmission to the greatest extent, so that the angular distribution of the three-color light is overlapped to the greatest extent possible, and the larger the angle overlapping area is, the better the system light efficiency is, and the system light efficiency is improved.

Referring to fig. 6 to 8, fig. 6 to 8 show the angular distribution of the light emitted from each of R, G1, G2, and B (i.e. the angular distribution of R, G1, G2, and B on the viewing surface a) after passing through the collimating lens 40, and the angular distribution of each of the light of RGB is dependent on the spatial positional relationship of each of the light emitting surfaces of RGB, and is limited by the positional difference of each of the light emitting surfaces of RGB, i.e. the three colors of light are spatially separated, so that the angular distributions of the light of each color are also separated. As can be seen from the figure, the angular distribution range of R light is-18 DEG to 0 DEG, the angular distribution range of G1 light is-18 DEG to 0 DEG, the angular distribution range of G2 light is 0 DEG to 18 DEG, and the angular distribution range of B light is 0 DEG to 18 deg.

It should be noted that, because the LED positions are distributed differently, the RGB three-color light is obliquely irradiated on the light homogenizing and color mixing device 20, so that the RGB light carrying the information of different positions is deformed to a certain extent after being shaped angularly, but the deformation is controlled to be as small as possible, and accordingly, the light homogenizing and color mixing device 20 is also formed. The dodging color mixing device 20 is used for shaping and homogenizing the multi-color illumination light emitted by the collimating lens 40 to form the multi-color illumination light, and the shape of the dodging color mixing device 20 corresponding to the angle distribution is matched with the shape of the display chip 50, and the angle distribution is as uniform as possible.

Referring to fig. 9 to 11, fig. 9 to 11 collectively show the angular distribution of the light emitted from each of R, G1, G2, and B through the light homogenizing and color mixing device 20 (i.e., the angular distribution of R, G1, G2, and B on the observation B surface).

Referring to fig. 12 to 14, fig. 12 to 14 are partial angle distribution diagrams of light sources of respective colors. Specifically, fig. 12 to 14 collectively show the angular distribution of the three-color light in the range of (H: -20.5 ° to 20.5 °; -V: -16 ° to 16 °) in the overlapping region θ. It should be explained that H represents a viewing angle in the horizontal direction; v represents the viewing angle in the vertical direction.

Referring to fig. 12 to 14, the angular distribution of the light sources of each color is relatively uniform within the overlapping region θ. Therefore, the incident angle distribution range α of the relay assembly 30 is smaller than the maximum overlapping area range θ of the light rays of different colors in the mixed-color illumination light, and is satisfied when α is less than or equal to θ. So arranged, the angular distribution of the individual colors of the mixed-color illumination light is more uniform within this interval.

Further, the angle distribution range β supported by the dodging color mixing device 20 is larger than the maximum value ψ (r, g, b) of the angle distribution ranges of the respective color light rays of the multicolor illumination light rays _max . Thus, the angle distribution range supported by the dodging color mixing device 20 can include the angle distribution range of each color in the polychromatic illumination light, and meanwhile, the smear phenomenon of large area can be avoided, see fig. 18 and 19.

Referring to fig. 15 to 17, fig. 15 to 17 show the angular distribution of R, G1, G2, and B on the observation C plane where the imaging lens 60 is located, and as can be seen from the figure, a more uniform angular distribution and a better color uniformity of the white field display effect can be obtained on the exit pupil plane 61 of the target imaging lens 60.

Referring specifically to fig. 1, in some embodiments, the relay assembly 30 includes a BS prism 31 and a first relay lens 32, and the BS prism 31 is disposed in the optical path between the first relay lens 32 and the light homogenizing color mixing device 20. It should be noted that the first relay lens 32 is a single aspheric lens, and the first relay lens 32 is preferably but not limited to a conventional lens, and may be a binary optical device such as a fresnel lens, so long as the volume of the display optical machine is compressed as much as possible on the basis of satisfying the light transmission function.

So configured, the BS prism 31 is disposed in the optical path between the first relay lens 32 and the dodging color mixing device 20 for transmitting the color mixing illumination light to the display chip 50 to be modulated into image light.

Based on the above embodiment, it should be explained that the multi-color illumination light emitted by the first light emitting element, the second light emitting element and the third light emitting element in the illumination light source 10 can be transmitted to the dodging color mixing device 20, the dodging color mixing device 20 can shape and homogenize the multi-color illumination light emitted by the first light emitting element 12, the second light emitting element 13 and the third light emitting element 14 to form the color mixing illumination light, and the conventional color mixing device is omitted and meanwhile, a good color mixing effect can be ensured. Further, the mixed-color illumination light is transmitted to the display chip 50 via the BS prism 31 and the first relay lens 32, and the display chip 50 modulates the mixed-color illumination light into image light and then transmits the image light to the imaging lens 60 via the BS prism 31 and the first relay lens 32 to be modulated and imaged.

Referring to fig. 1, in other embodiments, the relay assembly 30 includes a polarizing plate 33, a PBS prism 34, a first relay lens 32, a quarter wave plate 35 and a curved mirror 36, wherein the polarizing plate 33 is disposed in an optical path between the illumination light source 10 and the PBS prism 34, the first relay lens 32 and the curved mirror 36 are disposed on opposite sides of the PBS prism 34, respectively, and the quarter wave plate 35 is disposed in an optical path between the PBS prism 34 and the curved mirror 36.

So configured, the polarizer 33 is disposed in the optical path between the illumination source 10 and the PBS prism 34, and is used for converting the mixed-color illumination light into S-polarized light, the S-polarized light is transmitted to the display chip 50 through the PBS prism 34, the display chip 50 modulates and converts the S-polarized light into P-polarized light, the P-polarized light is transmitted to the quarter wave plate 35 through the PBS prism 34, and is transmitted to the curved mirror 36 through the quarter wave plate 35, then the curved mirror 36 transmits the P-polarized light to the quarter wave plate 35, at this time, the quarter wave plate converts the P-polarized light into S-polarized light, and finally, the S-polarized light is transmitted to the imaging lens 60 through the PBS prism 34, and the imaging process is performed through the exit pupil plane 61 of the imaging lens 60.

In this embodiment, curved mirror 36 is preferably, but not limited to, a concave mirror.

Preferably, the relay assembly 30 includes a turning prism 37 and a second relay lens 38, the turning prism 37 being disposed between the illumination light source 10 and the optical path of the polarizing plate 33, and the second relay lens 38 being disposed in the optical path between the turning prism 37 and the polarizing plate 33.

So configured, turning prism 37 cooperates with second relay lens 38 to transmit the mixed-color illumination light from dodging color mixing device 20 to PBS prism 34.

Based on the above embodiments, it should be explained that the multi-color illumination light emitted by the first light emitting element, the second light emitting element and the third light emitting element in the illumination light source 10 can be transmitted to the dodging color mixing device 20, and the dodging color mixing device 20 can shape and homogenize the multi-color illumination light emitted by the first light emitting element 12, the second light emitting element 13 and the third light emitting element 14 to form the multi-color illumination light. Further, the mixed-color illumination light is transmitted to the second relay lens 38 via the turning prism 37, and then, the polarizing plate 33 is disposed in the optical path between the illumination light source 10 and the PBS prism 34 for converting the mixed-color illumination light into S-polarized light.

The utility model also provides near-eye display equipment, which comprises an equipment body and a display optical machine, wherein the display optical machine is arranged on the equipment body. It will be appreciated that in some embodiments the device body may be a headset, i.e. a glasses body or a helmet body.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (11)

1. An illumination assembly for providing mixed color illumination light for a display chip (50), comprising:

an illumination light source (10) comprising a substrate (11), a first light-emitting element (12), a second light-emitting element (13) and a third light-emitting element (14), wherein the first light-emitting element (12), the second light-emitting element (13) and the third light-emitting element (14) are arranged on the substrate (11);

a light homogenizing and color mixing device (20), wherein the light homogenizing and color mixing device (20) is arranged on the light emitting side of the illumination light source (10) and is used for shaping and homogenizing multicolor illumination light rays emitted by the first light emitting element (12), the second light emitting element (13) and the third light emitting element (14) to form mixed color illumination light; and

and a relay assembly (30), wherein the relay assembly (30) is arranged on the light emitting side of the dodging color mixing device (20) and is used for transmitting the color mixing illumination light from the dodging color mixing device (20) to the display chip (50) so as to be modulated into image light.

2. The lighting assembly according to claim 1, characterized in that the light homogenizing and color mixing device (20) is a micro lens array or a binary optical device.

3. The lighting assembly according to claim 1, characterized in that the number of light homogenizing and color mixing devices (20) is a plurality, and that a plurality of the light homogenizing and color mixing devices (20) are stacked in the light path between the illumination light source (10) and the relay assembly (30).

4. The lighting assembly according to claim 1, characterized in that the lighting source (10) is one of an RGBW four-in-one source, an RGGB four-in-one source, and an RGB three-in-one source.

5. A lighting assembly according to claim 1, characterized in that the range of incidence angle distribution of the relay assembly (30) is smaller than the range of the maximum overlap area of the different colored light rays in the mixed-color lighting light.

6. The lighting assembly according to claim 1, characterized in that the dodging color mixing device (20) supports an angular distribution range which is larger than the maximum value of the angular distribution range of the polychromatic illumination light.

7. The lighting assembly according to any one of claims 1 to 6, wherein the relay assembly (30) comprises a BS prism (31), a first relay lens (32) and a collimating lens (40), the BS prism (31) being arranged in the light path between the first relay lens (32) and the light homogenizing and color mixing device (20), the collimating lens (40) being arranged in the light path between the lighting source (10) and the light homogenizing and color mixing device (20).

8. The lighting assembly according to any one of claims 1 to 6, wherein the relay assembly (30) comprises a polarizer (33), a PBS prism (34), a first relay lens (32), a quarter wave plate (35) and a curved mirror (36), the polarizer (33) being arranged in the optical path between the illumination source (10) and the PBS prism (34), the first relay lens (32) and the curved mirror (36) being arranged on opposite sides of the PBS prism (34), respectively, the quarter wave plate (35) being arranged in the optical path between the PBS prism (34) and the curved mirror (36).

9. The lighting assembly according to claim 8, wherein the relay assembly (30) comprises a turning prism (37), a second relay lens (38) and a collimating lens (40), the turning prism (37) is arranged between the light path of the illumination light source (10) and the polarizing plate (33), the second relay lens (38) is arranged in the light path between the turning prism (37) and the polarizing plate (33), and the collimating lens (40) is arranged in the light path between the illumination light source (10) and the light and color mixing device (20).

10. A display light engine, comprising:

the lighting assembly of any one of claims 1 to 9;

an imaging lens (60); and

a display chip (50), the display chip (50) being disposed in an optical path between the illumination assembly and the imaging lens (60) for modulating mixed color illumination light from the illumination assembly into image light for modulated imaging via the imaging lens (60).

11. A near-eye display device, comprising:

an equipment body; and

the display light engine of claim 10, wherein the display light engine is mounted on the device body.