CN113096553A

CN113096553A - Three-dimensional micro LED display

Info

Publication number: CN113096553A
Application number: CN202110531071.4A
Authority: CN
Inventors: 陈辰; 宋杰
Original assignee: Ningbo Saifu Electronics Co ltd
Current assignee: Ningbo Saifu Electronics Co ltd
Priority date: 2021-05-16
Filing date: 2021-05-16
Publication date: 2021-07-09

Abstract

The present disclosure relates to a stereoscopic micro LED display. The stereoscopic micro LED display includes: a first plurality of micro-LEDs presenting a first image of a first view; and a second plurality of micro-LEDs presenting a second image of a second view, wherein the first plurality of micro-LEDs are configured to produce light visible to a first eye of a viewer; and a second plurality of micro-LEDs configured to produce light visible to a second eye of the viewer.

Description

Three-dimensional micro LED display

Technical Field

Embodiments of the present disclosure relate generally to display devices and, more particularly, to stereoscopic micro LED displays and methods of manufacturing the same.

Background

In recent years, research institutes and companies of gallium nitride (GaN) such as SONY, SUMITOMO, etc., of saint basbara university, california, usa, have succeeded in producing high-power, high-efficiency blue and green light emitting diodes, laser diodes, etc., on specific GaN semipolar crystal planes. These particular crystal planes of GaN, such as (2021), (3031), have great potential and advantages in high efficiency, low efficiency degradation (efficiency drop) Light Emitting Diodes (LEDs) and high power long wavelength Laser Diodes (LDs). In recent years, with the continuous development of lighting display technology, higher and more comprehensive requirements are put on the aspects of light emitting performance, brightness, power consumption and the like of a light emitting device. In the context of such large environments, Micro-LEDs have come into operation. Micro-LEDs have their own unique advantages as a new generation of display technology, and their structures can be thinned, arrayed and miniaturized due to the small size of the device (on the order of a single pixel micron). Therefore, micro-LEDs have received much attention as a new generation display technology. The semiconductor industry has begun to develop a lot of micro-LED display technology. The display brightness, contrast, service life, stability and the like of the LCD are far superior to those of the LCD display technology.

At present, the development of augmented reality technology brings the revolution of 3D image presentation technology, but all 3D technologies are implemented by a head-mounted device, and the head-mounted device brings great constraint for people to enjoy 3D programs. Therefore, it is desirable to enjoy 3D programs as easily as ordinary tv programs without any external device, and simply, 3D programs can be enjoyed directly through the present display. Therefore, it is desirable to provide a display device capable of directly enabling people to watch a 3D program with naked eyes.

Disclosure of Invention

According to an aspect of the present disclosure, there is provided a display including: a first plurality of micro-LEDs presenting a first image of a first view; and a second plurality of micro-LEDs presenting a second image of a second view, wherein the first plurality of micro-LEDs are configured to produce light visible to a first eye of a viewer; and a second plurality of micro-LEDs configured to produce light visible to a second eye of the viewer.

A display according to the present disclosure, wherein a first group of the first plurality of micro-LEDs is configured to present a first image region of the first image and a second group of the first plurality of micro-LEDs is configured to present a second image region of the first image.

A display according to the present disclosure, wherein a first group of the second plurality of micro-LEDs is configured to present a first image region of a second image and a second group of the second plurality of micro-LEDs is configured to present a second image region of the second image.

A display according to the present disclosure, wherein the first plurality of micro-LEDs is disposed on a first portion of a surface of the display, the second plurality of micro-LEDs is disposed on a second portion of the surface of the display, and the first portion of the surface of the display and the second portion of the surface of the display have different orientations.

A display according to the present disclosure, wherein the display device is to switch from a first display mode in which the display device presents 3D images to a second display mode in which the display device presents 2D images in response to receiving a control signal.

The display according to the present disclosure, wherein the first plurality of micro LEDs are turned off in the second display mode.

The display according to the present disclosure, wherein the first plurality of micro-LEDs and the second plurality of micro-LEDs are turned on in the first display mode.

There is also provided according to another aspect of the present disclosure a display including: a curved surface; and a plurality of micro-LEDs disposed on the curved surface, wherein the plurality of micro-LEDs are configured to generate light in a plurality of directions.

A display according to the present disclosure, wherein a first micro LED of the plurality of micro LEDs is disposed on a first portion of the curved surface, a second micro LED of the plurality of micro LEDs is disposed on a second surface, and wherein the first portion of the curved surface and the second portion of the curved surface have different orientations.

A display according to the present disclosure, wherein the first micro-LEDs correspond to first pixels of the display and the second micro-LEDs correspond to second pixels of the display.

A display according to the present disclosure, wherein the first micro LEDs generate light in a first direction and the second micro LEDs generate light in a second direction.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram illustrating a display according to an exemplary embodiment of the present disclosure.

FIG. 2 is a schematic diagram illustrating a display according to a second exemplary embodiment of the present disclosure;

fig. 3 is a schematic diagram illustrating a display displaying a stereoscopic image according to a third exemplary embodiment of the present disclosure.

Fig. 4 is a schematic diagram illustrating a display displaying a stereoscopic image according to a fourth exemplary embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. Unless defined otherwise, all other scientific and technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, a first may also be termed a second, and vice versa, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at …" or "when …" or "in response to a determination", depending on the context.

For a better understanding of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram illustrating a display according to an exemplary embodiment of the present disclosure. A stereoscopic display as shown in fig. 1. Stereoscopic displays may present three-dimensional (3D) image data, such as 3D images. Viewers can enjoy 3D images without using special head-mounted devices and/or glasses. A plurality of viewers (e.g., two or more viewers) can enjoy the 3D image at the same time.

The stereoscopic display may be incorporated into any suitable computing device, such as an Augmented Reality (AR) device, a Virtual Reality (VR), a Mixed Reality (MR) device, a wearable device (e.g., watch, head mounted display), a television, a laptop computer, a tablet computing device, a see-through display (e.g., transparent display), and so forth. In some embodiments, a stereoscopic display may include one or more processors, memories, etc. for rendering 3D image data according to the present disclosure.

A stereoscopic display may include a plurality of micro LEDs (μ LEDs). Each micro LED may be a light emitting device (e.g., a light emitting diode) having a micrometer-scale size. By way of example, the diameter of the micro-LEDs may be about 5-25 μm. As another example, the diameter of the micro-LEDs may be greater than 25 μm or less than 5 μm.

Each micro LED may produce light having certain characteristics. By way of example, a given micro-LED may produce light of a particular color, such as red, blue, green, and the like. As another example, the micro-LEDs may generate light in a particular direction relative to a predetermined plane (e.g., a predetermined direction corresponding to a viewing angle). As another example, a micro LED may produce light at an intensity. In some embodiments, each feature of the micro LEDs may be independently controllable. For example, the value of the intensity and/or color of the light generated by the micro-LEDs may be controlled independently of the direction of the light. A pixel of a stereoscopic display may include one or more micro LEDs (e.g., red, green, and blue micro LEDs). In some embodiments, the micro LEDs may correspond to sub-pixels of a stereoscopic display.

In accordance with the present disclosure, micro LEDs may be arranged on a surface of a stereoscopic display in a suitable manner to generate 3D image data. The surface may have any suitable shape (e.g., spherical, flat, etc.). In some embodiments, the surface may be and/or include a curved surface. For example, as shown in FIG. 1, display 100 may include micro LEDs 110 disposed on a surface 105 of display 100. Surface 105 may be a curved surface. Various portions of surface 105 may have different orientations. In this way, micro-LEDs 110 disposed on various portions of surface 105 may generate light in various directions. In some embodiments, a plurality of micro-LEDs (e.g., micro-LEDs that may constitute a pixel, one or more columns and/or rows of micro-LEDs) may be disposed on one or more regions of surface 105 in a given orientation, producing light in a predetermined direction.

The location of a given micro LED on the surface of the stereoscopic display may be represented by one or more coordinates (e.g., cartesian coordinates, angular coordinates, etc.). In some embodiments, the one or more coordinates may define an angle corresponding to a direction of light generated by the micro-LEDs.

In some embodiments, a stereoscopic display may receive input image data representing a scene, such as one or more images of the scene (e.g., images of one or more views of the scene), data regarding a light field of the scene (also referred to as an input light field of the scene), and so forth. The input light field of a scene may include multiple images of the scene from various angles and/or perspectives. Stereoscopic displays may present a light field of a scene (also referred to as an "output light field") based on input image data. The output light field may include multiple images of various perspectives and/or views of the scene. The output light field may be constructed based on the input image data (e.g., by sampling the image data, converting the image data to the output light field based on a computational model, decoding the image data, etc.). In one embodiment, the output light field may be the same as the input light field. In another embodiment, an output light field may be generated based on an input light field (e.g., by processing the input light field, such as by a processor sampling the input light field).

The output light field may be rendered by using micro-LEDs to generate a plurality of light rays representative of the output light field. The light may have various characteristics (e.g., color, intensity, direction, etc.). By controlling the color, intensity, direction, and/or other characteristics of the light produced by the micro-LEDs, certain characteristics of the light may be produced by one or more micro-LEDs of the stereoscopic display. In some embodiments, the direction of the light may be controlled by generating the light using one or more micro-LEDs located at a particular location on a surface of the microdisplay (e.g., a portion of the surface of the microdisplay having a certain direction). By generating and/or rendering the output light field, the stereoscopic display may generate and/or display 3D images that may be viewed by multiple viewers without the use of special head-mounted devices, glasses, or the like.

The micro LEDs of the stereoscopic display may be configured to present images of multiple views. For example, the one or more micro-LEDs 110 may be configured to present an image of a first view (also referred to as a "first plurality of micro-LEDs"), while the one or more micro-LEDs 110 may be configured to present an image of a second view (also referred to as a "second plurality of micro-LEDs"). For example, fig. 2 is a schematic diagram illustrating a display according to a second exemplary embodiment of the present disclosure. As shown in fig. 2, the micro-LEDs 110 may include a first plurality of micro-LEDs 210 and a second plurality of micro-LEDs 220. The micro LED 210 and the micro LED220 may be configured to present a first image of a first view and a second image of a second view, respectively. The first image may be a left view image to be presented to the left eye of the viewer. The second image may be a right view image to be presented to the right eye of the viewer.

In some embodiments, the micro LEDs 210 may present the first image through multiple image areas that present the first image. Similarly, the micro LED220 may present the second image through a plurality of image areas that present the second image. As an example, the micro LEDs 210 may include one or more groups of micro LEDs 210 a-z. Each set of micro LEDs 210a-z may include one or more micro LEDs and may present an image area of a first image. The micro LEDs 220 may include one or more groups of micro LEDs 220 a-z. Each set of micro LEDs 220a-z may include one or more micro LEDs and may present an image area of a second image. Fig. 3 is a schematic diagram illustrating a display displaying a stereoscopic image according to a third exemplary embodiment of the present disclosure. In some embodiments, the micro LEDs 210a-z may present image areas 310a-z, respectively, of the first image 310 of FIG. 3. The micro LEDs 220a-z may present image areas 320a-z of the second image 320 of fig. 3. In this way, an image area of the first image (e.g., a right view image) and an image area of the second image (e.g., a left view image) may be alternately presented on the stereoscopic display. Therefore, the viewer can view the first image and the second image as a stereoscopic image. As referred to herein, an image region may be one or more portions of an image and may include any suitable number of pixels of the image (e.g., one or more pixels of the image, one or more sub-pixels of the image).

To produce a multi-view image, the first plurality of micro LEDs 210 and the second plurality of micro LEDs 220 may be disposed on various portions of the surface 105 having different orientations. Fig. 4 is a schematic diagram illustrating a display displaying a stereoscopic image according to a fourth exemplary embodiment of the present disclosure. As shown in FIG. 4, surface 105 may include regions 410a-z and regions 420 a-z. Regions 410a-z and regions 420a-z may have different orientations. For example, regions 410a-z may have a first orientation. The regions 420a-z may have a second orientation different from the first orientation. Micro LEDs 210a-z may be disposed on regions 410a-z, respectively, of surface 105. Micro LEDs 220a-z may be disposed on regions 420a-z of surface 105, respectively. In this way, the micro LEDs 210a-z and the micro LEDs 220a-z may generate light in different directions. In some embodiments, the first plurality of micro-LEDs 210 may produce light that is visible to the left eye of the viewer. The second plurality of micro-LEDs 220 may produce light that is visible to the right eye of the viewer. In some embodiments, the light generated by the first plurality of micro-LEDs 210 and/or one or more portions of the light are not visible to the right eye of the viewer. The light generated by the second plurality of micro-LEDs 220 and/or one or more portions of the light are not visible to the left eye of the viewer. In this manner, the image and/or image area produced by the first plurality of micro-LEDs 210 is presented to the left eye of the viewer. The image and/or image area produced by the second plurality of micro-LEDs 220 is presented to the right eye of the viewer.

Although a certain number of micro LEDs and image areas are shown in fig. 1-4, this is merely illustrative. It should be noted that, in accordance with the present disclosure, a stereoscopic display may include any suitable number of micro-LEDs, groups of micro-LEDs, and/or any other suitable components for presenting image data. The first image and the second image may be divided into any suitable number of image areas for presentation.

In some embodiments, a stereoscopic display may operate in multiple display modes. In a first display mode (e.g., 3D mode), the stereoscopic display may present a 3D image and/or images of multiple views as described above. In a second display mode (e.g., 2D mode), the stereoscopic display may present a two-dimensional (2D) image. Stereoscopic displays can be switched between display modes. For example, in response to receiving a control signal to switch from a first display mode to a second display mode, the stereoscopic display may turn off the first plurality of micro LEDs or the second plurality of micro LEDs so that an image of one view (e.g., a left view or a right view) may be presented. As another example, in response to receiving a control signal to switch from the second display mode to the first display mode, the stereoscopic display may turn on the first and second plurality of micro-LEDs such that images of multiple views (e.g., left and right views) may be presented.

According to one or more aspects of the present disclosure, a method for manufacturing a stereoscopic display is provided. The method may include providing a substrate suitable for deploying micro LEDs. The substrate may comprise silicon, sapphire, metal, and/or any other suitable material. The method may further include disposing a plurality of micro-LEDs on the substrate. For example, micro LEDs may be disposed on a surface of a substrate. In some embodiments, the surface of the substrate may be and/or include a curved surface (e.g., surface 105 of fig. 1 and 4). One or more micro-LEDs may be arranged as an array (e.g., one or more rows and/or columns of micro-LEDs) on a surface of a substrate. The micro LEDs may be disposed on the substrate using any suitable technique and/or combination of techniques for disposing and/or assembling micro LEDs on the substrate, e.g., bonding chips of micro LED chips to the substrate, a mass transfer fabrication process (e.g., transferring LED chips to a substrate), etc.

For simplicity of explanation, the methodologies of the present disclosure are depicted and described as a series of acts. However, acts in accordance with this disclosure may occur in various orders and/or concurrently, and with other acts not presented and described herein. Moreover, not all illustrated acts may be required to implement a methodology in accordance with the disclosed subject matter. In addition, those skilled in the art will understand and appreciate that the methodologies could alternatively be represented as a series of interrelated states via a state diagram or events. Additionally, it should be appreciated that the methodologies disclosed in this specification are capable of being stored on an article of manufacture to facilitate transporting and transferring such methodologies to computing devices. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device or memory paging medium.

The word "example" or "exemplary" is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as "exemplary" or "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects or designs. Rather, use of the word "example" or "exemplary" is intended to present concepts in a concrete fashion. As used in this application, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless specified otherwise, or clear from context, "X includes a or B" is intended to mean any of the natural inclusive permutations. That is, if X comprises A; x comprises B; or X includes A and B, then "X includes A or B" is satisfied under any of the foregoing circumstances. In addition, the articles "a" and "an" as used in this application and the appended claims should generally be construed to mean "one or more" unless specified otherwise or clear from context to be directed to a singular form. Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrase "in one implementation" or "an implementation" in various places throughout this specification are not necessarily all referring to the same implementation.

As used herein, when an element or layer is referred to as being "on" another element or layer, the element or layer may be directly on the other element or layer or intervening elements or layers may be present. In contrast, when an element or layer is referred to as being "directly on" another element or layer, there are no intervening elements or layers present.

Whereas many alterations and modifications of the present disclosure will no doubt become apparent to a person of ordinary skill in the art after having read the foregoing description, it is to be understood that any particular embodiment shown and described by way of illustration is in no way intended. Are considered to be limiting. Therefore, references to details of various embodiments are not intended to limit the scope of the claims, which in themselves recite only those features regarded as the disclosure.

The solution described herein may be implemented as a method, in which at least one embodiment has been provided. The actions performed as part of the methods may be ordered in any suitable way. Accordingly, embodiments may be constructed in which acts are performed in an order different than illustrated, which may include performing some acts concurrently, even though shown as sequential acts in illustrative embodiments. Further, the method may include more acts than those shown in some embodiments, and fewer acts than those shown in other embodiments.

While at least one illustrative embodiment of the invention has been described herein, many alternatives, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be within the spirit and scope of the invention. Accordingly, the foregoing description is by way of example only and is not intended as limiting. The invention is limited only as defined in the following claims and the equivalents thereto.

Claims

1. A stereoscopic micro LED display, comprising:

a first plurality of micro-LEDs presenting a first image of a first view; and

a second plurality of micro-LEDs presenting a second image of a second view,

wherein the first plurality of micro-LEDs is configured to produce light visible to a first eye of a viewer; and a second plurality of micro-LEDs configured to produce light visible to a second eye of the viewer.

2. The stereoscopic micro LED display of claim 1, wherein a first group of the first plurality of micro LEDs is configured to present a first image area of the first image and a second group of the first plurality of micro LEDs is configured to present a second image area of the first image.

3. The stereoscopic micro LED display of claim 2, wherein a first group of the second plurality of micro LEDs is configured to present a first image region of a second image and a second group of the second plurality of micro LEDs is configured to present a second image region of the second image.

4. The stereoscopic micro LED display of claim 1, wherein the first plurality of micro LEDs is disposed on a first portion of a surface of the display, the second plurality of micro LEDs is disposed on a second portion of the surface of the display, and the first portion of the surface of the display and the second portion of the surface of the display have different orientations.

5. The stereoscopic micro LED display of claim 1, wherein the display device is to switch from a first display mode to a second display mode in response to receiving a control signal, the display device presenting 3D images in the first display mode and the display device presenting 2D images in the second display mode.

6. The stereoscopic micro LED display of claim 5, wherein the first plurality of micro LEDs are turned off in the second display mode.

7. The display of claim 5, wherein the first plurality of micro-LEDs and the second plurality of micro-LEDs are turned on in the first display mode.

8. A stereoscopic micro LED display, comprising:

a curved surface; and

a plurality of micro-LEDs is disposed on a curved surface, wherein the plurality of micro-LEDs is configured to generate light in a plurality of directions.

9. The stereoscopic micro LED display of claim 8, wherein a first micro LED of the plurality of micro LEDs is disposed on a first portion of the curved surface and a second micro LED of the plurality of micro LEDs is disposed on a second surface, and wherein the first portion of the curved surface and the second portion of the curved surface have different orientations.

10. The stereoscopic micro LED display of claim 9, wherein the first micro LEDs correspond to first pixels of the display and the second micro LEDs correspond to second pixels of the display.

11. The stereoscopic micro LED display of claim 9, wherein the first micro LEDs generate light in a first direction and the second micro LEDs generate light in a second direction.