CN220419712U - Color light machine and display device - Google Patents
Color light machine and display device Download PDFInfo
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- CN220419712U CN220419712U CN202321876722.4U CN202321876722U CN220419712U CN 220419712 U CN220419712 U CN 220419712U CN 202321876722 U CN202321876722 U CN 202321876722U CN 220419712 U CN220419712 U CN 220419712U
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Abstract
The disclosure provides a color light machine and a display device, wherein the color light machine comprises a first color display, a second color display, a light combining prism and a lens group; the first color display is positioned at one side of the first light incident surface of the light combining prism, and the second color display is positioned at one side of the second light incident surface of the light combining prism; the first light incident surface and the second light incident surface of the light combining prism are adjacently arranged, and the first light incident surface of the light combining prism is opposite to the light emergent surface of the light combining prism; the light combining prism is used for combining the emergent light of the first color display and the emergent light of the second color display into a beam; the lens group is positioned on one side of the light emitting surface of the light combining prism and is used for outputting emergent light passing through the light combining prism.
Description
Technical Field
The disclosure relates to the technical field of display, in particular to a color light machine and display equipment.
Background
The Augmented Reality (AR) technology realizes real-time synchronization of the virtual world and the real world, satisfies that a user actually experiences things simulated in the virtual space in the real world, and enhances the user experience effect.
The existing AR product light engine has the main flow technology divided into four types of organic light emitting diodes (Organic Light Emitting Diode, OLED), micro light emitting diodes (Micro Light Emitting Diode, micro LEDs), digital light processing (Digital Light Processing, DLP) and liquid crystal on silicon (Liquid Crystal on Silicon, LCOS), wherein the DLP light engine has the advantages of large volume, low contrast of LCOS light engine and large occupied space of OLED module, so that the scheme of matching micro LEDs with optical waveguides is a future trend.
Due to the technical problem, the micro led chip cannot integrate three colors of RGB on the same chip at present, so that the corresponding optomachines are also divided into single colors and colors. The prior art of the monochromatic light machine is mature, and the color light machine can not be put into mass production due to the problem of low brightness of a red screen. Furthermore, as shown in fig. 1, the three-color light combining path needs to use a cross dichroic prism (X-cube) device, which is difficult to process, has high cost, and is prone to ghost problems.
Disclosure of Invention
The disclosure provides a color light machine and a display device, which can reduce the cost and processing difficulty of the color light machine.
An embodiment of a first aspect of the present disclosure provides a color light engine, a first color display, a second color display, a light combining prism, and a lens group;
the first color display is positioned at one side of the first light incident surface of the light combining prism, and the second color display is positioned at one side of the second light incident surface of the light combining prism;
the first light incident surface and the second light incident surface of the light combining prism are adjacently arranged, and the first light incident surface of the light combining prism is opposite to the light emergent surface of the light combining prism;
the light combining prism is used for combining the emergent light of the first color display and the emergent light of the second color display into a beam;
the lens group is positioned on one side of the light emitting surface of the light combining prism and is used for outputting the emergent light passing through the light combining prism.
According to some embodiments of the disclosure, the light combining prism is formed by gluing two right-angle prisms, and an optical film layer is plated on a gluing surface; the optical film layer can transmit the first color light emitted by the first color display and emit the second color light emitted by the second color display.
According to some embodiments of the disclosure, the two right angle prisms are each 45 ° right angle prisms.
According to some embodiments of the disclosure, the refractive index of the light combining prism is between 1.5 and 1.55.
According to some embodiments of the disclosure, the other surfaces of the light combining prism except the first light incident surface, the second light incident surface and the light emergent surface are frosted and coated with black ink.
According to some embodiments of the disclosure, the first color display is a green micro led micro display and the second color display is a blue micro led micro display.
According to some embodiments of the disclosure, the first color display is a blue micro led micro display and the second color display is a green micro led micro display.
According to some embodiments of the present disclosure, the lens group includes, in order from the image side to the object side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, and the optical power is sequentially set to be positive, negative, positive, and positive.
According to some embodiments of the disclosure, the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are all spherical lenses.
According to some embodiments of the disclosure, the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are all glass lenses.
According to some embodiments of the disclosure, the color engine further comprises a diaphragm; the diaphragm is arranged on the image side of the lens group.
Embodiments of a second aspect of the present disclosure provide a display device comprising a color light engine as described in the first aspect.
In the color light machine and the display device provided by the disclosure, the color light machine comprises a first color display, a second color display, a light combining prism and a lens group; the first color display is positioned at one side of the first light incident surface of the light combining prism, and the second color display is positioned at one side of the second light incident surface of the light combining prism; the first light incident surface and the second light incident surface of the light combining prism are adjacently arranged, and the first light incident surface of the light combining prism is opposite to the light emergent surface of the light combining prism; the light combining prism is used for combining the emergent light of the first color display and the emergent light of the second color display into a beam; the lens group is positioned on one side of the light emitting surface of the light combining prism and is used for outputting emergent light passing through the light combining prism.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the disclosure. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic diagram of a prior art color engine;
FIG. 2 shows a schematic diagram of a color engine provided by the present disclosure;
FIG. 3 shows an MTF diagram of a first color engine embodiment;
FIG. 4 shows an optical distortion diagram of a first embodiment of a color engine;
FIG. 5 shows an MTF diagram of a second color engine embodiment;
fig. 6 shows an optical distortion diagram of a second embodiment of the color engine.
Detailed Description
Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood that the description is only exemplary and is not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts of the present disclosure.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. 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 specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; 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 addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.
Fig. 2 shows a schematic diagram of a color light engine provided by the present disclosure. As shown in fig. 2, the color light machine provided in the present disclosure sequentially includes a diaphragm, a lens group, a light combining prism 100, a first color display 210 and a second color display 220 from an image side to an object side, and after the light emitted from the first color display 210 and the second color display 220 is combined into one beam by the light combining prism, the light is imaged by the lens group and the diaphragm to the image side.
Specifically, the first color display 210 is located at a first light incident surface side of the light combining prism, the second color display 220 is located at a second light incident surface side of the light combining prism, the first light incident surface and the second light incident surface of the light combining prism 100 are adjacently disposed, and the first light incident surface of the light combining prism 100 is disposed opposite to the light emergent surface of the light combining prism 100.
The light combining prism 100 is used for combining the light emitted from the first color display 210 and the second color display 220 into one beam. Alternatively, the first color display 210 may be a green micro led micro display, and the second color display 220 may be a blue micro led micro display, or the first color display 210 may be a blue micro led micro display, and the second color display 220 may be a green micro led micro display. In the embodiment, on the premise that the red micro-LED micro-display technology is not mature, the function of a color light machine is realized by using the blue-green micro-display, and particularly, the double-channel micro-LED blue-green light machine is provided.
In this embodiment, the blue and green micro led micro displays may be manufactured based on micro led chips, the green micro led micro display has a light emission wavelength between 515 and 535nm, the blue micro led micro display has a light emission wavelength between 450 and 470nm, the diagonal dimension of the light emission area of the micro display is, for example, between 3mm and 3.5mm, and the half-peak light emission angle is within ±30°, so as to ensure the imaging effect.
Specifically, the light combining prism 100 may be a cube or a cuboid, and the light combining prism 100 may be formed by gluing two right-angle prisms, specifically may be formed by gluing two 45 ° right-angle prisms, and a special optical film layer is plated on the gluing surface, and the optical film layer can transmit the first color light emitted by the first color display 210 and emit the second color light emitted by the second color display 220. For example, the refractive index of the material of the light combining prism 100 may be between 1.5 and 1.55, and when the first color display 210 is a green micro led micro display and the second color display 220 is a blue micro led micro display, the film characteristics of the optical film layer may be: the reflection rate is more than 95% in the wave band of 440-490 nm; the light transmittance of the light-emitting diode is more than 90% in the wave band of 510-600 nm, namely, the optical film layer can reflect blue light and transmit green light.
Specifically, the other surfaces of the light combining prism 100 except the first light incident surface, the second light incident surface and the light emergent surface are frosted and coated with black ink, that is, the light combining prism has one top surface on both sides, which needs to be frosted, and the frosted surface is coated with black ink, which can be specifically a material capable of absorbing light and having a refractive index of about 1.4.
The lens group is located at one side of the light emitting surface of the light combining prism 100, and the light emitted from the light combining prism is output to the image space for imaging.
As shown in fig. 2, the lens group includes, in order from the image side to the object side, a first lens G1, a second lens G2, a third lens G3, a fourth lens G4, and a fifth lens G5, the first lens G1 being set to positive power, the second lens G2 being set to negative power, the third lens G3 being set to negative power, the fourth lens G4 being set to positive power, and the fifth lens G5 being set to positive power. In this embodiment, only 5 lenses are used, and the number of lenses is small, so that the production cost and the assembly difficulty can be reduced.
Specifically, the first lens G1, the second lens G2, the third lens G3, the fourth lens G4, and the fifth lens G5 are spherical lenses and are glass lenses. In the embodiment, 5 glass spherical lenses are adopted, so that the cost is low, and the imaging effect is less influenced by temperature.
Of course, the present application is not limited to the configuration of the lens group, and the number of lenses in the lens group and the optical parameters may be set according to actual needs.
In addition, a protective glass can be arranged between the synthetic prism and the micro-display, the size of the protective glass is not smaller than that of the micro-display, and the micro-display can be isolated and protected through the protective glass.
Based on the above structural design constraints, the present application provides two specific color light engines as follows.
Embodiment one: the color light machine CRA is 0 degree, the size of the cube light combining prism is above 4.4mm, the total length of the light machine is 9.5-10.5 mm, the uniformity of the projection picture is better, and the uniformity is 85-90%. CRA is an abbreviation for chirf Ray Angle, meaning the Chief Ray Angle, referring to the Ray of the central aperture of a certain field of view.
The limitations and specific parameters of example one are as follows:
entrance pupil diameter: 3-4 mm;
angle of view: 25-35 degrees;
the lens arrangement sequence is as follows: positive-negative-positive;
the focal length range and the optical design basic parameters of each lens are shown in the following table 1, wherein the parameters include the type, radius of curvature, center thickness, material and the like of the lens.
Fig. 3 shows a modulation transfer function MTF diagram of the first embodiment of the color optical engine, and fig. 4 shows an optical distortion diagram of the first embodiment of the color optical engine, from which it can be seen that both aberrations and optical distortions of the first embodiment of the color optical engine are small, so as to satisfy the human eye viewing level.
TABLE 1
Embodiment two: the color light machine CRA is 10 degrees, the size of the cube light combining prism is below 4mm, the total length of the light machine is 8.5-9 mm, and the uniformity of the projection picture is 75-80%.
The limiting conditions and specific parameters of the second embodiment are as follows:
entrance pupil diameter: 3-4 mm;
angle of view: 25-35 degrees;
the lens arrangement sequence is as follows: positive-negative-positive;
the focal length range and the optical design basic parameters of each lens are shown in the following table 2, wherein the parameters include the type, radius of curvature, center thickness, material and the like of the lens.
Fig. 5 shows an MTF diagram of the second embodiment of the color optical engine, and fig. 6 shows an optical distortion diagram of the second embodiment of the color optical engine, from which it can be seen that the aberration and optical distortion of the second embodiment of the color optical engine are smaller, so as to satisfy the human eye viewing level.
The color light machine comprises a first color display, a second color display, a light combining prism and a lens group; the first color display is positioned at one side of the first light incident surface of the light combining prism, and the second color display is positioned at one side of the second light incident surface of the light combining prism; the first light incident surface and the second light incident surface of the light combining prism are adjacently arranged, and the first light incident surface of the light combining prism is opposite to the light emergent surface of the light combining prism; the light combining prism is used for combining the emergent light of the first color display and the emergent light of the second color display into a beam; the lens group is positioned on one side of the light emitting surface of the light combining prism and is used for outputting emergent light passing through the light combining prism.
Corresponding to the color light machine, the application also provides display equipment which comprises the color light machine. The display device may be a wearable device such as AR or VR, or may be another device such as a projector, which is not limited in this application.
The embodiments of the present disclosure are described above. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. The scope of the disclosure is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be made by those skilled in the art without departing from the scope of the disclosure, and such alternatives and modifications are intended to fall within the scope of the disclosure.
Claims (12)
1. A color engine, comprising: the display comprises a first color display, a second color display, a light combining prism and a lens group;
the first color display is positioned at one side of the first light incident surface of the light combining prism, and the second color display is positioned at one side of the second light incident surface of the light combining prism;
the first light incident surface and the second light incident surface of the light combining prism are adjacently arranged, and the first light incident surface of the light combining prism is opposite to the light emergent surface of the light combining prism;
the light combining prism is used for combining the emergent light of the first color display and the emergent light of the second color display into a beam;
the lens group is positioned on one side of the light emitting surface of the light combining prism and is used for outputting the emergent light passing through the light combining prism.
2. The color light machine according to claim 1, wherein the light combining prism is formed by gluing two right-angle prisms, and an optical film layer is plated on the glued surface; the optical film layer can transmit the first color light emitted by the first color display and emit the second color light emitted by the second color display.
3. The color engine of claim 2, wherein said two right angle prisms are each 45 degrees
Right angle prism.
4. The color light engine of claim 1, wherein the refractive index of the light combining prism is between 1.5 and 1.55.
5. The color light engine of claim 1, wherein the other surfaces of the light combining prism except the first light incident surface, the second light incident surface and the light emergent surface are frosted and coated with black ink.
6. The color engine of claim 1, wherein said first color display is a green micro led micro display and said second color display is a blue micro led micro display.
7. The color engine of claim 1, wherein said first color display is a blue micro led micro display and said second color display is a green micro led micro display.
8. The color light engine of any one of claims 1-7, wherein the lens group comprises, in order from an image side to an object side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, and the optical power is sequentially set to be positive, negative, positive, and positive.
9. The color engine of claim 8, characterized in that said first, second, third, fourth and fifth lenses are spherical lenses.
10. The color engine of claim 9, characterized in that said first, second, third, fourth and fifth lenses are glass lenses.
11. The color engine of claim 1, further comprising a diaphragm; the diaphragm is arranged on the image side of the lens group.
12. A display device comprising a color light engine as claimed in any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321876722.4U CN220419712U (en) | 2023-07-17 | 2023-07-17 | Color light machine and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321876722.4U CN220419712U (en) | 2023-07-17 | 2023-07-17 | Color light machine and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220419712U true CN220419712U (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321876722.4U Active CN220419712U (en) | 2023-07-17 | 2023-07-17 | Color light machine and display device |
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| Country | Link |
|---|---|
| CN (1) | CN220419712U (en) |
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2023
- 2023-07-17 CN CN202321876722.4U patent/CN220419712U/en active Active
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