CN216772115U - Display device and VR glasses - Google Patents
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- CN216772115U CN216772115U CN202220415348.7U CN202220415348U CN216772115U CN 216772115 U CN216772115 U CN 216772115U CN 202220415348 U CN202220415348 U CN 202220415348U CN 216772115 U CN216772115 U CN 216772115U
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Abstract
The utility model discloses a display device and VR (virtual reality) glasses, which are used for solving the problem that a display device adopting a Micro-LED cannot accurately display images, wherein the display device comprises a monochromatic Micro-LED light-emitting unit, an optical waveguide unit and a color conversion unit, wherein the monochromatic Micro-LED light-emitting unit is used for generating monochromatic light according to the images to be displayed; the optical waveguide unit comprises an incident window and an exit window and is used for transmitting the monochromatic light received by the incident window to the exit window; the color conversion unit is located on the exit window side of the optical waveguide unit and used for converting monochromatic light of the exit window into colored light, the display device performs color conversion on the monochromatic light emitted by the monochromatic Micro-LED light emitting unit through the color conversion unit, display efficiency can be improved, in addition, due to the fact that refractive indexes of different colored light in the optical waveguide unit are different, the monochromatic Micro-LED light emitting unit can be used for avoiding displacement difference of the light, and therefore images can be accurately displayed.
Description
Technical Field
The utility model relates to the technical field of display, in particular to a display device and VR glasses.
Background
At present, a Virtual Reality (VR) display technology generally adopts a Thin Film Transistor Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) screen to project, and combines a lens group to amplify an image to be displayed, and the LCD or the OLED may cause the display device to be heavy and inconvenient for a user to carry and use; and Micro Light Emitting diodes (Micro-LEDs) have the characteristics of self-luminescence without a backlight source, have simple structure, small volume and Light weight, and can solve the problems of heavy overall structure, inconvenience for carrying and using of a user of a VR display device. However, under the condition of maintaining high resolution of the screen (more than 2000ppi), further reduction of the size of the VR display device may cause the pixel size to be reduced to tens of microns, and if Micro-LEDs with three colors of red, green and blue are adopted, the display efficiency of the Micro-LEDs with three colors of red, green and blue will be reduced sharply, and if the blue Micro-LED screen is adopted in combination with a quantum dot color conversion layer, the preparation process and the alignment precision of the quantum dot pixel with high resolution are limited. In addition, Micro-LEDs of red, green and blue can shift when emitting, thereby affecting the synthesis of images and failing to accurately display images.
SUMMERY OF THE UTILITY MODEL
The utility model provides a display device and VR glasses, which are used for solving the problem that a display device adopting Micro-LEDs in the prior art cannot accurately display images.
In a first aspect, the present invention provides a display device comprising:
the single-color Micro-LED light-emitting unit is used for generating single-color light according to an image to be displayed;
the optical waveguide unit comprises an incident window and an exit window and is used for transmitting the monochromatic light received by the incident window to the exit window;
and the color conversion unit is positioned on the exit window side of the light guide unit and is used for converting the monochromatic light of the exit window into colored light.
In one possible embodiment, the monochromatic Micro-LED light emitting units are blue Micro-LED light emitting units;
the blue Micro-LED light-emitting unit is used for generating blue light according to the image to be displayed.
In one possible embodiment, the color conversion unit includes a red conversion layer, a green conversion layer, and a blue transmission layer.
In one possible embodiment, the red and green conversion layers each comprise quantum dots and the blue transmissive layer comprises a scattering particle layer.
In a possible implementation, the color conversion unit is specifically configured to:
converting the blue light passing through the red conversion layer into red light according to a preset proportion;
converting the blue light passing through the green conversion layer into green light according to a preset proportion;
and transmitting the blue light passing through the blue transmission layer into blue light according to a preset proportion.
In one possible embodiment, the display device further includes a light shielding layer located at a spaced position between each of the red conversion layers, each of the green conversion layers, and each of the blue transmission layers.
In one possible embodiment, the apparatus further comprises:
the driving substrate is used for providing driving signals for the light-emitting units according to the image to be displayed;
and the lens unit is positioned between the monochromatic Micro-LED light emitting unit and the incidence window and is used for collimating and transmitting the monochromatic light to the optical waveguide unit.
In one possible embodiment, the lens unit includes a first lens and a second lens coaxially disposed, and the second lens is located between the first lens and the optical waveguide unit.
In a second aspect, the present invention provides VR glasses comprising a display device as set forth in any one of the first aspect.
In a possible embodiment, the glasses further comprise a display carrier, said display being arranged inside said display carrier.
The utility model has the following beneficial effects:
the utility model provides a display device and VR glasses, wherein the display device comprises a monochromatic Micro-LED light emitting unit, an optical waveguide unit and a color conversion unit, wherein the monochromatic Micro-LED light emitting unit is used for generating monochromatic light according to an image to be displayed; the optical waveguide unit comprises an incident window and an emergent window and is used for transmitting the monochromatic light received by the incident window to the emergent window; the color conversion unit is positioned on the exit window side of the optical waveguide unit and used for converting monochromatic light of the exit window into colored light, the display device performs color conversion on the monochromatic light emitted by the monochromatic Micro-LED light emitting unit by arranging the color conversion unit, the display efficiency can be improved, in addition, the refractive indexes of different colored light in the optical waveguide unit are different, compared with the prior art in which quantum dots are arranged on a Micro-LED screen to generate a color image, the monochromatic Micro-LED light emitting unit can avoid displacement difference of the light, a blue light image source of an RGB three-color image is converted into the color image in the exit window, and the three-color synthesized image has no displacement, so that the image can be accurately displayed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a color conversion unit according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a lens unit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of VR glasses according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, in order to solve the problem of the overall thickness of a display device caused by an LCD or an OLED screen, user experience is further improved, generally, Micro-LEDs with simple structures, small volumes and light weight are adopted, but under the condition of maintaining high screen resolution (greater than 2000ppi), the further reduction of the size of the VR display device can cause the size of a screen pixel to be reduced to dozens of microns, if Micro-LEDs with three colors of red, green and blue are adopted, the display efficiency of the Micro-LEDs is reduced, in addition, the performance attenuation of corresponding Micro-LED chips is serious when the Micro-LED chips are smaller than 10um, meanwhile, due to the fact that the refractive indexes of light rays with different colors in an optical waveguide are different, displacement can occur during emergent, further image synthesis is influenced, and images cannot be accurately displayed.
Based on the above problems, embodiments of the present invention provide a display device and VR glasses, so as to solve the problem of color display of an ultra-high resolution Micro-LED screen in VR applications in the prior art.
In the following, the display device and the VR glasses provided by the exemplary embodiment of the present application are described with reference to the accompanying drawings in combination with the application scenarios described above, it should be noted that the application scenarios described above are only shown for the convenience of understanding the spirit and principle of the present application, and the embodiment of the present application is not limited in this respect.
As shown in fig. 1, a schematic structural diagram of a display device provided in an embodiment of the present invention includes a monochromatic Micro-LED light emitting unit 101, a light guide unit 102, and a color conversion unit 103:
a monochromatic Micro-LED light emitting unit 101 for generating monochromatic light according to an image to be displayed;
an optical waveguide unit 102 including an entrance window 1021 and an exit window 1022, for guiding the monochromatic light received by the entrance window 1021 to the exit window 1022;
and the color conversion unit 103 is located on the side of the exit window 1022 of the optical waveguide unit 102 and is used for converting the monochromatic light of the exit window 1022 into the colored light.
The present invention provides a display device, including: the display device comprises a monochromatic Micro-LED light emitting unit 101, an optical waveguide unit 102 and a color conversion unit 103, wherein the monochromatic Micro-LED light emitting unit is used for generating monochromatic light according to an image to be displayed; the optical waveguide unit 102 includes an entrance window 1021 and an exit window 1022, and is configured to conduct monochromatic light received by the entrance window 1021 to the exit window 1022; and the color conversion unit 103 is located on the side of the exit window 1022 of the optical waveguide unit 102 and is used for converting the monochromatic light of the exit window 1022 into the colored light. In addition, compared with the prior art in which red, green and blue Micro-LEDs are used, the monochromatic Micro-LED light emitting unit 101 can avoid the displacement difference of light, and thus can accurately display images.
In a specific implementation, the monochromatic Micro-LED light emitting unit can be a blue Micro-LED light emitting unit, and the blue Micro-LED light emitting unit can generate blue light according to an image to be displayed.
The specific structure of the display device provided by the utility model is explained in detail below by taking a blue Micro-LED light-emitting unit as an example:
as shown in fig. 2, a schematic diagram of a specific structure of a display device according to an embodiment of the present invention includes a monochromatic Micro-LED light emitting unit 101, an optical waveguide unit 102, a color conversion unit 103, a driving substrate 201, and a lens unit 202;
the driving substrate 201 is connected to the single-color Micro-LED light emitting unit 101, and provides a driving signal to the single-color Micro-LED light emitting unit 101 according to an image to be displayed, and the driving substrate generally has a shape corresponding to the overall shape of the display device, and a size smaller than the size of the display device. In an implementation, the driving substrate 201 may be made in a square or rectangular shape, which is not limited herein.
The single color Micro-LED light emitting unit 101 generates single color light according to an input driving signal.
In a specific implementation, the single-color Micro-LED light emitting unit 101 may employ a blue Micro-LED light emitting unit. The Micro-LED has the characteristics of self luminescence without a backlight source, has simple structure, small volume and lighter weight, and can solve the problems that the VR display device is heavy and inconvenient for a user to carry and use;
in addition, since the light rays with different colors have different refractive indexes in the optical waveguide unit 102, the light rays can be displaced during outgoing, and further the synthesis of the image is influenced.
The lens unit 202 is positioned between the monochromatic Micro-LED light emitting unit 101 and the incidence window 1021, and is used for collimating and transmitting monochromatic light emitted by the monochromatic Micro-LED light emitting unit 101 to the optical waveguide unit 102;
it should be noted that, in the case of maintaining high resolution of the screen, further reduction in the size of the VR display device requires that the size of the pixel point is reduced to tens of microns, however, the accuracy of the existing inkjet printing technology and lithography technology is not high enough, and a high-resolution quantum layer pixel point cannot be prepared.
The optical waveguide unit 102 is used for transmitting the monochromatic light received by the incident window 1021 to the emergent window 1022;
the color conversion unit 103, as shown in fig. 2, converts monochromatic light into color light upon receiving the monochromatic light emitted from the exit window 1022, and forms a virtual image a of an image to be displayed, so that the eyeball B of the observer observes the virtual image a.
As shown in fig. 3, for a schematic structural diagram of a lens unit provided in an embodiment of the present invention, a lens unit 202 may include a first lens 301 and a second lens 302 coaxially disposed, and the second lens 302 is located between the first lens 301 and the optical waveguide unit 102, and the lens unit 202 may be formed by disposing a plurality of lenses, so as to avoid problems of image distortion and large occupied volume caused by low optical design freedom of a monolithic lens.
As shown in fig. 4, which is a schematic structural diagram of a color conversion unit according to an embodiment of the present invention, the color conversion unit 103 may include a red conversion layer R, a green conversion layer G, a blue transmission layer B, and a light shielding layer 401.
Note that, in the embodiment of the present invention, the red conversion layer R and the green conversion layer G in the color conversion unit 103 each include quantum dots. The quantum dot material is a nanoscale light excitation material, and the stimulated emission wavelength of the quantum dot material can be controlled by controlling the particle size of the quantum dot. The color conversion unit 103 made of quantum dot material can effectively improve the color purity of emergent light, and is beneficial to improving the color gamut of the display device. The red conversion layer R and the green conversion layer G may be made of a material having a color conversion function, such as a fluorescent conversion material, and are not limited thereto.
Because the angle of the light emitted by the quantum dot material through excitation is random, in order to enable the emergent light type of the blue transmission layer B to be consistent with that of the red conversion layer R and the green conversion layer G, a plurality of scattering particles are distributed on the blue transmission layer B, and the scattering particles can emit the blue light incident on the blue Micro-LED light-emitting unit after generating scattering effect, so that the intensity distribution of the emitted blue light is close to that of the red light and the green light. In a specific implementation, scattering particles such as titanium dioxide or silicon dioxide may be mixed into the matrix material to form the scattering particle layer, which is not limited herein.
In a specific implementation, the color conversion unit 103 may convert the blue light passing through the red conversion layer R into red light according to a preset luminance ratio, convert the blue light passing through the green conversion layer G into green light according to a preset luminance ratio, and transmit the blue light passing through the blue transmission layer B into blue light according to a preset luminance ratio.
Further, a distance is set between each blue transmissive layer B, each red conversion layer R, and each green conversion layer G, and a light-shielding layer 401 is provided at a position spaced between each blue transmissive layer B, each red conversion layer R, and each green conversion layer G to prevent light emitted to each blue transmissive layer B, each red conversion layer R, and each green conversion layer G from interfering with each other, thereby improving color resolution of each layer.
Based on the same concept, embodiments of the present invention further provide VR glasses, and the implementation of the VR glasses may refer to the implementation of the display device, and repeated descriptions are omitted.
As shown in fig. 5, a schematic structural diagram of VR glasses according to an embodiment of the present invention is provided, where the glasses include the display device 501 and a display device carrier 502, and the display device 501 is disposed inside the display device carrier 502.
When the VR glasses provided by the embodiment of the present invention are powered on, the driving substrate 201 starts to provide a driving signal to the monochromatic Micro-LED light emitting unit 101 according to an image to be displayed, the monochromatic Micro-LED light emitting unit 101 generates monochromatic light according to the input driving signal, the lens unit 202 collimates and transmits the monochromatic light emitted by the monochromatic Micro-LED light emitting unit 101 to the optical waveguide unit 102, the optical waveguide unit 102 transmits the monochromatic light received by the incident window 1021 to the exit window 1022, the color conversion unit 103 converts the monochromatic light into colored light after receiving the monochromatic light emitted by the exit window 1022, and generates a virtual image a of the image to be displayed, and an enlarged virtual image formed by refraction needs an observer to observe on the other side of the conductive medium, so that an eyeball position and a position of the observer are respectively located on two sides of the optical waveguide unit 102, and thus, blue light transmitted through the lens unit 202 and the optical waveguide unit 102, the quantum dot pixel array passing through the exit window 1022 becomes red, green and blue light, and the human eye observes the enlarged virtual image a through the exit window 1022.
According to the display device and the VR glasses provided by the utility model, after the display device or the VR glasses are powered on, the driving substrate 201 provides a driving signal to the monochromatic Micro-LED light emitting unit 101 according to an image to be displayed, the monochromatic Micro-LED light emitting unit 101 generates monochromatic light according to an input driving signal, the lens unit 202 collimates and transmits the monochromatic light emitted by the monochromatic Micro-LED light emitting unit 101 to the optical waveguide unit 102, the optical waveguide unit 102 transmits the monochromatic light received by the incident window 1021 to the emergent window 1022, and the color conversion unit 103 converts the monochromatic light into the colored light after receiving the monochromatic light emitted by the emergent window 1022 to form the virtual image A of the image to be displayed, so that the eyeball B of an observer observes the virtual image A. The display device or VR glasses perform color conversion on monochromatic light emitted from the monochromatic Micro-LED light emitting unit 101 by providing the color conversion unit 103, since the single-color Micro-LED light emitting unit 101 is used, display efficiency can be improved, and in addition, since the refractive indexes of the light rays of different colors in the optical waveguide unit 102 are different, the refractive index of the monochromatic light rays in the optical waveguide unit 102 is more stable than that of the prior art using the red, green and blue three-color Micro-LED, the displacement difference of the light rays can be avoided by using the monochromatic Micro-LED light emitting unit 101, so that an image can be accurately displayed, and, at the same time, an image to be displayed is enlarged by disposing the lens unit 202 at the entrance window 1021, and the exit window 1022 is provided with the color conversion unit 103, so that the size of the quantum layer pixel point of the color conversion unit 103 does not need to be too small, thereby reducing the preparation difficulty of the quantum point.
Various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A display device, characterized in that the device comprises:
the single-color Micro-LED light-emitting unit is used for generating single-color light according to an image to be displayed;
the optical waveguide unit comprises an incident window and an exit window and is used for transmitting the monochromatic light received by the incident window to the exit window;
and the color conversion unit is positioned on the exit window side of the light guide unit and is used for converting the monochromatic light of the exit window into colored light.
2. The device of claim 1, wherein the single color Micro-LED lighting unit is a blue Micro-LED lighting unit;
the blue Micro-LED light-emitting unit is used for generating blue light according to the image to be displayed.
3. The apparatus of claim 2, wherein the color conversion unit comprises a red conversion layer, a green conversion layer, and a blue transmission layer.
4. The apparatus of claim 3, wherein the red conversion layer and the green conversion layer each comprise quantum dots and the blue transmissive layer comprises scattering particles.
5. The apparatus of claim 4, wherein the color conversion unit is specifically configured to:
converting the blue light passing through the red conversion layer into red light according to a preset proportion;
converting the blue light passing through the green conversion layer into green light according to a preset proportion;
and transmitting the blue light passing through the blue transmission layer into blue light according to a preset proportion.
6. The apparatus of claim 4, further comprising a light-shielding layer positioned at spaced locations between each of the red conversion layers, each of the green conversion layers, and each of the blue transmission layers.
7. The apparatus of claim 1, further comprising:
the driving substrate is used for providing driving signals for the light-emitting units according to the image to be displayed;
and the lens unit is positioned between the monochromatic Micro-LED light emitting unit and the incidence window and is used for collimating and transmitting the monochromatic light to the optical waveguide unit.
8. The apparatus of claim 7, wherein the lens unit comprises a first lens and a second lens coaxially disposed, the second lens being located between the first lens and the optical waveguide unit.
9. VR glasses comprising a display device according to any of claims 1-8.
10. The eyewear of claim 9, further comprising a display carrier, wherein the display is disposed within the display carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220415348.7U CN216772115U (en) | 2022-02-28 | 2022-02-28 | Display device and VR glasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220415348.7U CN216772115U (en) | 2022-02-28 | 2022-02-28 | Display device and VR glasses |
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| CN216772115U true CN216772115U (en) | 2022-06-17 |
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| CN202220415348.7U Active CN216772115U (en) | 2022-02-28 | 2022-02-28 | Display device and VR glasses |
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