Contact lens with collimating function and XR glasses

Abstract

To provide a contact lens with a collimating function that is combined with a main body of XR glasses to allow recognition of images with sufficient resolution, and XR glasses using the same.SOLUTION: XR glasses have: a main body part of XR glasses that has a display part for the left eye and a display part for the right eye each formed of a translucent micro light-emitting diode display having a pixel array in which at least three sub-pixels form one pixel, and one or more micro light-emitting diodes (31-33) included in each of the sub-pixels, in which the pixel has an opening ratio of 10% or more; and contact lenses with a collimating function (1000) that each have a transparent column aggregate in which a plurality of transparent columns (1100) to be a collimator is arrayed in which the radiation angle with transmittance of 50% or more is 5 degrees or less for rays of light emitted from an arbitrary point of the display part for the left eye and the display part for the right eye, in which the rays of light transmitting through each transparent column are focused at a focal point.SELECTED DRAWING: Figure 31

Description

[Technical field]

[0001] The present invention relates to a semi-transparent micro light-emitting diode (LED) display for XR (Cross Reality) glasses, a display for XR glasses, VR (Virtual Reality) glasses, VR glasses, and contact lenses with a collimating function. [Background technology]

[0002] XR glasses that use organic electroluminescence (EL) elements (OLED) as the light engine (light source for images) are commercially available (see Non-Patent Document 1). However, these XR glasses have an insufficient amount of light from the OLED elements, making it difficult to recognize the images displayed on the XR glasses in a bright outside environment. In order to increase the amount of light, it is conceivable to increase the drive current density of the OLED elements, but the drive current density is generally several tens of mA / cm. 2 Therefore, increasing the drive current density leads to a decrease in efficiency and accelerated degradation.

[0003] Meanwhile, with regard to the optical system, XR glasses using optical waveguides and projection optical systems have been proposed (see Patent Documents 1, 2, and 3). Optical systems using optical waveguides and projection optical systems have the advantage of being able to make the XR glasses thinner, but they have problems such as an increased number of parts, complex optical design, and high manufacturing difficulty of optical parts. It is particularly difficult to ensure a wide viewing angle, and while the current viewing angle is a maximum of about 60 degrees, it is not easy to further expand it in terms of optical design (see Non-Patent Document 2).

[0004] We have yet to realize XR glasses that have the ambient light transmittance required to see the outside world, sufficient brightness for image recognition in bright daytime environments, a wide viewing angle and a wide eyebox (= the range where the image is not lost due to eye movement), and are lightweight, thin, and compact, and can be worn all the time like glasses.

[0005] If the display can be made semi-transparent (see-through), it is not necessary to use an optical waveguide, and the optical components of the XR glasses can be simplified. Patent Document 4 proposes AR glasses using see-through organic EL elements. However, as mentioned above, organic EL elements lack brightness. Increasing the light-emitting area to increase brightness prevents the display from being made semi-transparent. Moreover, even if the light-emitting area is expanded to cover the entire pixel, organic EL elements do not provide sufficient brightness for XR glasses.

[0006] To ensure sufficient light output, it is desirable to use micro LEDs as the light source. LEDs have a current density 1,000 times higher (several tens of A to several hundred A / cm) than organic EL elements. 2 This is because it can be driven by a microLED. Not only can it ensure sufficient brightness for XR glasses, but it can also achieve high brightness in a very small area, making it easy to make the display itself translucent. If XR glasses can be constructed with a translucent display that uses microLEDs as a light source without using an optical waveguide, it will be possible to realize XR glasses that are lightweight, thin, and can be worn at all times like glasses.

[0007] A method has been proposed in which a lens (microlens) is placed in front of a translucent display placed close to the eye using a micro LED as a light source to generate a virtual image (see Patent Document 5). In this method, one microlens is used for a certain group of pixels, and the pixel groups are arranged at regular intervals to ensure an aperture ratio, so the virtual image is not projected in a continuous state. In addition, since the shape of the virtual image area created by the lens is circular, the field of view of the outside world that enters the circle of the virtual image area is affected by distortion by the lens. In principle, if a microlens is placed on each pixel to generate a virtual image pixel by pixel, and the virtual image can be generated as a collection of virtual images for each pixel, a perfect virtual image that does not distort the field of view of the outside world around the virtual image can be projected in real space. However, the method of generating a virtual image by placing a microlens on each pixel of a few μm in size requires controlling the distance between the pixel and the microlens in Å units, making it very difficult to ensure positional accuracy. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Special Publication No. 2022-517207 [Patent Document 2] US Patent Application Publication No. 2020 / 0379214 [Patent Document 3] Special Publication No. 2022-521974 [Patent Document 4] Special Publication No. 2020-523628 [Patent Document 5] U.S. Pat. No. 1,063,4912 [Non-patent literature]

[0009] [Non-Patent Document 1] [Retrieved September 17, 2023], Internet〈URL:https: / / www.itmedia.co.jp / fav / articles / 2306 / 10 / news049.html 〉 [Non-Patent Document 2] [Retrieved September 17, 2023], Internet <URL: https: / / prtimes.jp / main / html / rd / p / 000000004.000030718.html> Summary of the Invention [Problem to be solved by the invention]

[0010] The problem that the present invention aims to solve is to provide a translucent micro light-emitting diode display for XR glasses that allows the outside world to be clearly seen, allows the displayed image to be clearly recognized even in a bright outside world, displays images with sufficient resolution, and is thin, and to provide XR glasses that use this XR glass translucent micro light-emitting diode display.

[0011] Another problem that the present invention aims to solve is to provide a display for VR glasses that can display images with sufficient resolution and is thin, and VR glasses that use this display for VR glasses.

[0012] Yet another problem that the present invention aims to solve is to provide a contact lens with a collimating function that can be used in combination with the XR glasses main body to recognize images with sufficient resolution, and XR glasses using this contact lens with a collimating function. [Means for solving the problem]

[0013] In order to solve the above problems, the present invention provides: a pixel array in which one pixel is composed of at least three or more sub-pixels; one or more micro light emitting diodes included in each of said sub-pixels; a collimator provided for each pixel or each subpixel, the collimator narrowing the radiation angle of light from the micro light-emitting diode to 5 degrees or less; having The pixel aperture ratio of the semi-transparent micro light-emitting diode display for XR glasses is 10% or more.

[0014] Here, the light emission angle refers to the angle range from the emission direction where the light intensity is at its maximum to where that intensity becomes half, and a light emission angle of 5 degrees or less means that, with the emission direction where the light intensity is at its maximum as the reference (0 degrees), the angle range where the light intensity becomes half is within ±2.5 degrees, or a range of 5 degrees or less.

[0015] The collimator may be composed of a microlens and an opening (aperture or pinhole) that limits the emission range of light from the micro light-emitting diode to the vicinity of the focal point of the microlens, or may be composed of a columnar body of a size included in the emission area of ​​light from the micro light-emitting diode, and the columnar body has a plurality of light-transmitting parts that are separated from each other and extend in the direction of the central axis, or may be composed of a structure in which a plurality of the columnar bodies are stacked in the direction of the central axis, and the light-transmitting parts of a pair of adjacent columnar bodies are shifted from each other in a direction perpendicular to the central axis. In the former collimator, the light from the micro light-emitting diode limited by the opening passes through the microlens to obtain a parallel light beam. The opening is typically tubular, particularly cylindrical. When a collimator is provided for each pixel, the light from all the micro light-emitting diodes included in one pixel passes through one opening and then passes through one microlens to obtain a parallel light beam. When a collimator is provided for each subpixel, the light from all the micro light-emitting diodes included in one subpixel passes through one opening and then passes through one microlens to obtain a parallel light beam. In the latter collimator, the light from the micro light-emitting diode passes through multiple light-transmitting sections to obtain a parallel light beam. Typically, the outer peripheral surface of the light-transmitting section is covered with a light-absorbing film. In this way, the light incident on the outer peripheral surface of the light-transmitting section is absorbed, and only the light traveling in the direction of the central axis of the light-transmitting section is finally obtained, and this light is emitted as a parallel light beam from the end of the light-transmitting section.

[0016] The collimator can be designed to easily narrow the light emission angle of the micro light-emitting diode to 5 degrees or less. The collimator is preferably configured to narrow the light emission angle of the micro light-emitting diode to 0.1 degrees or more and 2.0 degrees or less. This allows the displayed image to be recognized with a sufficiently high resolution.

[0017] This semi-transparent micro light-emitting diode display for XR glasses preferably has sufficient brightness (maximum brightness of about 5000 to 10000 nits) compared to external light so that images can be clearly recognized even in a bright outside environment.

[0018] The pixel aperture ratio (the ratio of the area of ​​the pixel through which visible light from the outside can pass) must be at least 10% or more in order to form a translucent micro light-emitting diode display, and is preferably 40% or more, so that the outside world can be clearly recognized through the translucent micro light-emitting diode display.

[0019] In one example, one pixel has a red light emitting micro light emitting diode, a green light emitting micro light emitting diode, and a blue light emitting micro light emitting diode to realize the three primary colors of red (R), green (G), and blue (B). In one example, these micro light emitting diodes are covered with a transparent resin that transmits visible light, and the surface of the transparent resin is covered with a light reflective film configured to reflect light toward the inside of the opening. In another example, one pixel is composed of only a plurality of blue light emitting or ultraviolet light emitting micro light emitting diodes. Typically, these micro light emitting diodes are covered with a red phosphor, a green phosphor, or a blue phosphor, and the surface of the red phosphor, the green phosphor, or the blue phosphor is covered with a light reflective film configured to reflect light toward the inside of the opening. In this case, the light from the blue light emitting or ultraviolet light emitting micro light emitting diode is wavelength converted by transmitting through the red phosphor, the green phosphor, or the blue phosphor, and the three primary colors of red (R), green (G), and blue (B) are realized.

[0020] Typically, the number of micro light-emitting diodes included in one subpixel is 3 or more, or one micro light-emitting diode has at least one n-side electrode and at least three or more p-side electrodes. Typically, one subpixel has a main wiring for an n-side electrode and a main wiring for a p-side electrode, and the main wiring for a p-side electrode has at least three or more branch wirings.

[0021] The red light-emitting micro light-emitting diode, the green light-emitting micro light-emitting diode and the blue light-emitting micro light-emitting diode can all be AlGaInN micro light-emitting diodes, the green light-emitting micro light-emitting diode and the blue light-emitting micro light-emitting diode can be AlGaInN micro light-emitting diodes, and the red light-emitting micro light-emitting diode can be AlGaInP micro light-emitting diodes. These micro light-emitting diodes can be horizontal or vertical.

[0022] This semi-transparent micro light-emitting diode display for XR glasses is typically constructed to be flexible. Specifically, for example, a wiring board in which wiring is formed on a substrate made of transparent plastic such as polyethylene terephthalate, polyethylene naphthalate, polycarbonate, etc. is used, and a pixel array is formed on the wiring board, thereby obtaining a flexible semi-transparent micro light-emitting diode display for XR glasses.

[0023] XR glasses are a general term for glasses that use technologies such as AR (Augmented Reality), MR (Mixed Reality), and SR (Substitutional Reality), as well as intermediate technologies between these technologies (for example, technologies positioned between AR and MR), and are image display devices that create a space that provides a simulated experience by fusing the real and virtual worlds. AR is a technology that projects a virtual world onto real space, MR is a technology that fuses real space and virtual space, and SR is a technology that overlays past images onto real space, making it appear as if a past event is happening right in front of your eyes.

[0024] The present invention also provides A left-eye display unit and a right-eye display unit are provided. The left eye display unit and the right eye display unit a pixel array in which one pixel is composed of at least three or more sub-pixels; one or more micro light emitting diodes included in each of said sub-pixels; a collimator provided for each pixel or each subpixel, the collimator narrowing the radiation angle of light from the micro light-emitting diode to 5 degrees or less; having The aperture ratio of the pixel of the semi-transparent micro light-emitting diode display is more than 10%. These are XR glasses that consist of:

[0025] In the invention of the XR glasses, what has been described in relation to the invention of the translucent micro light-emitting diode display for XR glasses above is valid.

[0026] The present invention also provides A pixel array; a collimator provided for each pixel of the pixel array, the collimator narrowing the radiation angle of light from the pixel to 5 degrees or less; The display for VR glasses is an organic electroluminescence display or a liquid crystal display having the above structure.

[0027] VR is a technology that allows you to experience a virtual world as if it were the real world. VR glasses include goggle-type and head-mounted display (HMD)-type glasses. In the invention of the display for VR glasses, the above description in relation to the invention of the semi-transparent micro light-emitting diode display for XR glasses is valid, unless it is contrary to the nature of the invention.

[0028] The present invention also provides A display unit for a left eye and a display unit for a right eye are provided. The left eye display unit and the right eye display unit A pixel array; a collimator provided for each pixel of the pixel array, the collimator narrowing the radiation angle of light from the pixel to 5 degrees or less; Organic electroluminescence display or liquid crystal display having It is a VR glass that consists of.

[0029] Here, the VR glasses include goggles and head mounted displays (HMD).

[0030] The present invention also provides An XR glasses main body having a left-eye display unit and a right-eye display unit each of which is made up of a translucent micro light-emitting diode display having a pixel array in which one pixel is composed of at least three or more sub-pixels and one or more micro light-emitting diodes included in each of the sub-pixels, the aperture ratio of the pixel being 10% or more; a contact lens with a collimating function, which has a transmittance of 50% or more and a radiation angle of 5 degrees or less for light emitted from any point on the left-eye display unit and the right-eye display unit; These are XR glasses that have the following features.

[0031] The collimating contact lens may be basically configured in any way as long as it can make the radiation angle of 50% or more for light emitted from any point of the left eye display unit and the right eye display unit 5 degrees or less. Typically, the part (central part) of the collimating contact lens excluding the outer periphery can be configured by a transparent column assembly in which a large number of transparent columns in the shape of a regular hexagonal pyramid are arranged on a curved surface corresponding to the surface of the cornea in a honeycomb shape so that the side surfaces are in close contact with each other. A light absorbing film is provided on the side surface of each transparent column. In this case, it is preferable that when the collimating contact lens is attached to the cornea, the convergence point of the light passing through each transparent column of the collimating contact lens is located near the center of the crystalline lens. The closer the convergence point is to the center of the eyeball, the narrower the field of view becomes, but if the lens is designed and manufactured so that the convergence point of the transmitted light is located near the center of the crystalline lens, a sufficiently wide field of view can be ensured.

[0032] When this contact lens with collimating function is placed on the cornea and the XR glasses main body is placed in front of the eye, light from the micro light-emitting diode enters one end of the transparent column of the contact lens with collimating function and exits from the other end, allowing light with a radiation angle of 5 degrees or less to enter the crystalline lens.

[0033] Light has wave properties, and there are diffraction phenomena, some light passes through light absorbing films, and some light passes beyond the geometrically designed angle. Therefore, a radiation angle of 5 degrees or less means that the radiation angle range with a transmittance of 50% or more is 5 degrees or less (±2.5 degrees or less) based on the direction of light emitted from any point on the display toward the convergence point of light passing through each transparent column of the above-mentioned collimating contact lens.

[0034] In this XR glasses invention, everything other than the above applies as described in relation to the XR glasses invention already described, unless it is contrary to the nature of the invention.

[0035] The present invention also provides A contact lens with a collimating function that has a transmittance of 50% or more and a radiation angle of 5 degrees or less for light emitted from any point.

[0036] When wearing these collimating contact lenses, the amount of light entering the eye is reduced, but the user can see clearly from far away to very close. As the lenses can simultaneously correct both farsightedness and nearsightedness, they can also be used as contact lenses in everyday life.

[0037] In addition, the focal range has been expanded, making it possible to recognize images on a nearby display regardless of the presence or absence of a lens that generates a virtual image. It can also be used with VR glasses, making it possible to make VR glasses thinner by eliminating the need for large lenses to generate virtual images.

[0038] In the invention of this collimating contact lens, unless it is contrary to its nature, everything other than the above applies as described in relation to the invention of the XR glasses already explained. Effect of the Invention

[0039] According to the semi-transparent micro light-emitting diode display for XR glasses of the present invention, the outside world can be clearly seen because it is semi-transparent, i.e., see-through, and the micro light-emitting diode display has high brightness, so that the displayed image can be clearly recognized even in a bright outside world. The collimator provided for each pixel or each sub-pixel can narrow the radiation angle of light from the micro light-emitting diode to 5 degrees or less, so that an image can be displayed with sufficient resolution. Since no optical waveguide or projection optical system is required, the number of parts is small, the optical system can be easily designed, and it can be configured thin. By configuring XR glasses using this semi-transparent micro light-emitting diode display for XR glasses, it is possible to realize excellent XR glasses that can form an image on the retina of the user's eye in units of one pixel. Furthermore, according to the display for VR glasses of the present invention, when an organic electroluminescence display or a liquid crystal display is used, the collimator provided for each pixel of the pixel array can narrow the radiation angle of light from the pixel to 5 degrees or less, so that an image can be displayed with sufficient resolution. By configuring VR glasses using this display for VR glasses, it is possible to realize excellent VR glasses that can form an image on the retina of the user's eye in units of one pixel. In addition, the contact lens with collimating function according to the present invention attenuates the transmittance of light having an emission angle of at least 5 degrees (±2.5 degrees) from the direction toward the convergence point of light passing through each transparent column of the contact lens to 50% or less, so that when the contact lens is placed on the cornea, a clear image of any point can be formed on the retina from long distances to close distances. By combining this contact lens with collimating function with the main body of XR glasses, it is possible to realize XR glasses that can display images with sufficient resolution without using a collimator in the main body of the XR glasses. [Brief description of the drawings]

[0040] [Figure 1]1 is a cross-sectional view showing a translucent micro LED display for XR glasses according to a first embodiment of the present invention; FIG. [Diagram 2] 1 is a plan view showing one pixel of a translucent micro LED display for XR glasses according to a first embodiment of the present invention; [Diagram 3] 1 is a perspective view showing one pixel of a translucent micro LED display for XR glasses according to a first embodiment of the present invention; FIG. [Figure 4] 1 is an enlarged cross-sectional view showing a portion of one sub-pixel of one pixel of a translucent micro LED display for XR glasses according to a first embodiment of the present invention. FIG. [Diagram 5] FIG. 2 is a perspective view showing a horizontal micro LED used in the translucent micro LED display for XR glasses according to the first embodiment of the present invention; [Figure 6] 1 is a cross-sectional view for explaining the operation of the translucent micro LED display for XR glasses according to the first embodiment of the present invention; FIG. [Figure 7] FIG. 4 is a cross-sectional view showing a translucent micro LED display for XR glasses according to a second embodiment of the present invention. [Figure 8] FIG. 11 is a plan view showing one pixel of a semi-transparent micro LED display for XR glasses according to a second embodiment of the present invention. [Figure 9] FIG. 11 is a perspective view showing one pixel of a translucent micro LED display for XR glasses according to a second embodiment of the present invention. [Figure 10] FIG. 11 is a cross-sectional view showing a translucent micro LED display for XR glasses according to a third embodiment of the present invention. [Figure 11] FIG. 13 is a perspective view showing a collimator used in a translucent micro LED display for XR glasses according to a third embodiment of the present invention. [Figure 12] FIG. 11 is a perspective view showing one pixel of a translucent micro LED display for XR glasses according to a third embodiment of the present invention. [Figure 13]FIG. 13 is a perspective view showing a collimator used in a translucent micro LED display for XR glasses according to a fourth embodiment of the present invention. [Figure 14] FIG. 13 is a perspective view showing a collimator used in a translucent micro LED display for XR glasses according to a fifth embodiment of the present invention. [Figure 15] FIG. 13 is a cross-sectional view showing a translucent micro LED display for XR glasses according to a sixth embodiment of the present invention. [Figure 16A] FIG. 13 is a schematic diagram for explaining the configuration of a collimator used in a translucent micro LED display for XR glasses according to a sixth embodiment of the present invention. [Figure 16B] FIG. 13 is a schematic diagram for explaining the configuration of a collimator used in a translucent micro LED display for XR glasses according to a sixth embodiment of the present invention. [Figure 16C] FIG. 13 is a schematic diagram for explaining the configuration of a collimator used in a translucent micro LED display for XR glasses according to a sixth embodiment of the present invention. [Figure 17] FIG. 13 is a cross-sectional view showing a translucent micro LED display for XR glasses according to a seventh embodiment of the present invention. [Figure 18] FIG. 13 is a perspective view showing one pixel of a translucent micro LED display for XR glasses according to the seventh embodiment of the present invention. [Figure 19] FIG. 23 is a right side view showing XR glasses according to the eighth embodiment of the present invention. [Figure 20] 13 is a schematic diagram showing a state in which a user wears XR glasses according to an eighth embodiment of the present invention in front of the eyes. [Figure 21] FIG. 23 is a right side view for explaining a problem that occurs when a collimator is eliminated in the XR glasses according to the eighth embodiment of the present invention. [Figure 22] FIG. 13 is a right side view showing XR glasses according to a ninth embodiment of the present invention. [Figure 23]13 is a schematic diagram showing a state in which a user wears XR glasses according to a ninth embodiment of the present invention in front of the eyes. [Figure 24] A cross-sectional view showing a display for VR glasses according to a tenth embodiment of the present invention. [Diagram 25] FIG. 23 is a right side view showing the VR glasses according to the eleventh embodiment of the present invention. [Figure 26] 13 is a schematic diagram showing a state in which a user wears VR glasses according to an eleventh embodiment of the present invention in front of the eyes. [Figure 27] A right side view showing the main body of XR glasses according to the twelfth embodiment of the present invention. [Figure 28A] FIG. 23 is a plan view showing a collimating contact lens of XR glasses according to the twelfth embodiment of the present invention. [Figure 28B] FIG. 23 is a cross-sectional view showing a collimating contact lens of XR Glasses according to the twelfth embodiment of the present invention. [Figure 28C] 12A is a plan view showing a transparent column that constitutes a collimating contact lens of XR glasses according to the twelfth embodiment of the present invention. FIG. [Figure 28D] 12A is a side view showing a transparent column that constitutes a collimating contact lens of XR glasses according to the twelfth embodiment of the present invention. FIG. [Figure 29A] 12A to 12C are cross-sectional views for explaining a manufacturing method of a collimating contact lens of XR glasses according to the twelfth embodiment of the present invention. [Figure 29B] 12A to 12C are cross-sectional views for explaining a manufacturing method of a collimating contact lens of XR glasses according to the twelfth embodiment of the present invention. [Figure 29C] 12A to 12C are cross-sectional views for explaining a manufacturing method of a collimating contact lens of XR glasses according to the twelfth embodiment of the present invention. [Figure 29D] 12A to 12C are cross-sectional views for explaining a manufacturing method of a collimating contact lens of XR glasses according to the twelfth embodiment of the present invention. [Figure 29E]12A to 12C are cross-sectional views for explaining a manufacturing method of a collimating contact lens of XR glasses according to the twelfth embodiment of the present invention. [Diagram 30] 23 is a schematic diagram showing a state in which a user wears a collimating contact lens of XR glasses according to a twelfth embodiment of the present invention on the cornea. FIG. [Diagram 31] 23 is a schematic diagram showing a state in which a user wears XR glasses according to a twelfth embodiment of the present invention in front of the eyes. [Diagram 32] 23 is a schematic diagram showing a state in which a user wears XR glasses according to a twelfth embodiment of the present invention in front of the eyes. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] Hereinafter, modes for carrying out the invention (hereinafter referred to as "embodiments") will be described.

[0042] First Embodiment [Semi-transparent micro LED display for XR glasses] Fig. 1 shows a semi-transparent micro LED display for XR glasses according to a first embodiment, and is a cross-sectional view showing a pixel arrangement. Fig. 2 and Fig. 3 are a plan view and a perspective view showing one pixel of the semi-transparent micro LED display for XR glasses, respectively. Fig. 4 is a cross-sectional view of one sub-pixel of one pixel of the semi-transparent micro LED display for XR glasses.

[0043] As shown in FIG. 1 to FIG. 4, a pixel array is provided by arranging pixels 20 in a two-dimensional matrix on a flexible and transparent wiring substrate 10. Each pixel 20 has three sub-pixels, each of which has a red-emitting micro LED 31, a green-emitting micro LED 32, and a blue-emitting micro LED 33. These micro LEDs 31 to 33 are provided at equal intervals on one diagonal line of the pixel 20. All of these micro LEDs 31 to 33 are horizontal and have the same structure, shape, and size. The micro LED 31 is an AlGaInN-based LED or an AlGaInP-based LED, and the micro LEDs 32 and 33 are AlGaInN-based LEDs. The size of the pixel 20 is, for example, 4 to 6 μm square (corresponding to 4000 to 6000 PPI), but is not limited thereto.

[0044] Micro LEDs 31 to 33 are shown in FIG. 5. As shown in FIG. 5, in the micro LEDs 31 to 33, a light emitting layer 35 and a p-type semiconductor layer 36 are sequentially laminated on an n-type semiconductor layer 34, except for a part of the n-type semiconductor layer 34, a p-side electrode 37 made of four metals is provided in a row on the p-type semiconductor layer 36, and an n-side electrode 38 made of metal is provided on the n-type semiconductor layer 34 in a part adjacent to the light emitting layer 35 and the p-type semiconductor layer 36. The micro LEDs 31 to 33 may have semiconductor layers other than the n-type semiconductor layer 34, the light emitting layer 35, and the p-type semiconductor layer 36, as necessary. In the micro LEDs 32 and 33, the n-type semiconductor layer 34 is an n-type GaN layer, the p-type semiconductor layer 36 is a p-type GaN layer, and the light emitting layer 35 is an In barrier layer. x Ga 1-x In as N-layer and well layer y Ga 1-y InN layers are stacked alternately. x Ga 1-x N / In y Ga 1-yAn N-multi-quantum well (MQW) structure (x < y, 0 ≤ x < 1, 0 ≤ y < 1), where the In composition ratios x and y are selected according to the emission wavelengths of green or blue light. When the micro-LED 31 is an AlGaInN-based LED, its n-type semiconductor layer 34, light-emitting layer 35, and p-type semiconductor layer 36 have the same structure as the micro-LEDs 32 and 33. When the micro-LED 31 is an AlGaInP-based LED, the n-type semiconductor layer 34 is an n-type AlGaInP layer, the p-type semiconductor layer 36 is a p-type AlGaInP layer, and the light-emitting layer 35 is In x Ga 1-x P / In y Ga 1-y It has a P MQW structure, and the In composition ratios x and y are selected according to the emission wavelength of red light. The p-side electrode 37 and the n-side electrode 38 are at the same height as each other. Although not shown in the figure, an Sn film used when mounting the micro-LED chips 31 to 33 on the wiring substrate 10 is provided on the p-side electrode 37 and the n-side electrode 38.

[0045] As shown in FIGS. 1 to 4, on the wiring substrate 10, a main trunk wiring portion 41 for the n-side electrode is provided parallel to one side of the pixel 20 and extending in the vicinity of this side. The main trunk wiring portion 41 for the n-side electrode branches to the micro-LEDs 31 to 33 in a direction perpendicular to the main trunk wiring portion 41 for the n-side electrode, and further bends in a direction parallel to the main trunk wiring portion 41 for the n-side electrode and is electrically connected to the n-side electrodes 38 of the micro-LEDs 31 to 33. Also, on the wiring substrate 10, a main trunk wiring portion 42 for the p-side electrode is provided in a direction perpendicular to the main trunk wiring portion 41 for the n-side electrode. Four branch wiring portions 43 for the p-side electrode branch from the main trunk wiring portion 42 for the p-side electrode to each of the micro-LEDs 31 to 33, and are each electrically connected to the four p-side electrodes 37.

[0046] As shown in FIG. 1, FIG. 3, and FIG. 4, the micro LEDs 31 to 33 are covered with a transparent resin layer 50. The transparent resin layer 50 has a shape in which the top of a hemisphere is cut parallel to a great circle, and the side surface is curved. A light reflecting film 60 is provided so as to cover the upper surface and side surface of the transparent resin layer 50 except for the central portion. The light reflecting film 60 has a circular opening 61 at the center of the upper surface. The opening 61 is located above the micro LEDs 31 to 33. On the lateral outer side of the light reflecting film 50, a transparent resin layer 50 identical to the transparent resin layer 50 covering the micro LEDs 31 to 33 is provided at the same height as the upper surface of the light reflecting film 60. A cylinder 70 having an inner diameter equal to or larger than the inner diameter of the opening 61 is provided around the opening 61 of the light reflecting film 60, and the inner side wall of the cylinder 70 and the opening 61 form the aperture 71. The diameter of the opening 61 is, for example, 100 to 500 nm. The diameter of the opening 61 is selected to be small enough so that the transmitted light functions as a point light source, but if the diameter of the opening 61 is too small, it will increase the diffraction of light and extremely reduce the transmittance of light, so it is desirable to set the diameter to 100 nm or more. The radiation angle (θ) depends on the value (d / f) obtained by dividing the diameter (d) of the opening 61 by the focal length (f) of the microlens 90 described below (θ=~d / f). Therefore, the diameter (d) of the opening 61 is determined taking into consideration the focal length (f) of the microlens 90 and the efficiency of light use, and it is considered appropriate that the diameter (d) of the opening 61 is 500 nm or less. A transparent resin layer 80 is provided on the transparent resin layer 50 and the light reflecting film 60 so as to cover the cylinder 70. This transparent resin layer 80 is also embedded in the aperture 71. A hemispherical microlens 90 is provided on the transparent resin layer 80, integral with the transparent resin layer 80, and coaxially with the cylinder 70. The focus of the microlens 90 is at or near the center of the opening 61. The inner sidewall of the cylinder 70 is made of a light absorbing film, which serves to block light that has passed through the opening 61 and reaches areas other than the microlens 90. For example, a black resist for a color filter can be used as the light absorbing film. The microlens 90, the inner sidewall of the cylinder 70, and the aperture 71 formed by the opening 61 form a collimator.The collimator provided for each sub-pixel narrows the radiation angle of light from the micro LEDs 31-33 to 5 degrees or less, preferably 0.1 to 2.0 degrees. The diameter of the micro lens 90 is, for example, 1 to 2 μm. The refractive index of the transparent resin layer 50, the transparent resin layer 80, and the micro lens 90 is, for example, 1.3 to 1.8. Typically, the transparent resin layer 50 is made of a silicon-based resin such as PDMS (polydimethylsiloxane) or an acrylic-based resin, and the transparent resin layer 80 in which the micro lens 90 is formed is made of a photocurable resin, but is not limited thereto.

[0047] [Operation of pixel 20 in a translucent micro LED display for XR glasses] FIG. 6 shows the light emission state of one subpixel of the pixel 20. As an example, a case where the subpixel has a micro LED 31 will be described. As shown in FIG. 6, when a forward voltage is applied between the p-side electrode 37 and the n-side electrode 38 of the micro LED 31 and electricity is applied, the micro LED 31 emits light and transmits the light through the n-type semiconductor layer 34 to the outside. The emitted light travels in various directions, but the light toward the aperture 71 transmits as it is through the transparent resin layer 80 inside the aperture 71, and then transmits through the transparent resin layer 80 above that to enter the micro lens 90. Since the focal point of the micro lens 90 is inside the aperture 71, the light that enters the micro lens 90 is emitted from the micro lens 90 as parallel light parallel to the central axis of the micro lens 90. The light that does not travel toward the aperture 71 of the cylinder 70 is reflected by the light reflecting film 60, and most of the light finally travels toward the aperture 71 and is emitted to the outside as parallel light.

[0048] As described above, according to the first embodiment of the semi-transparent micro LED display for XR glasses, the see-through feature allows the outside world to be clearly seen, the high brightness of the micro LED diode display allows the displayed image to be clearly recognized even in a bright outside world, and the collimator formed by the micro lens 90 and aperture 71 provided for each sub-pixel of pixel 20 allows the radiation angle of light from the micro LEDs 31 to 33 to be narrowed to 5 degrees or less, allowing the image (of the proximity display) to be focused on the retina with sufficient resolution.

[0049] Second embodiment [Semi-transparent micro LED display for XR glasses] Fig. 7 shows a cross-sectional view of a pixel arrangement of a semi-transparent micro LED display for XR glasses according to the first embodiment, and Fig. 8 and Fig. 9 are a plan view and a perspective view, respectively, showing one pixel of the semi-transparent micro LED display for XR glasses according to the first embodiment.

[0050] As shown in FIG. 7 to FIG. 9, in this translucent micro LED display for XR glasses, instead of the red light emitting micro LED 31, the green light emitting micro LED 32, and the blue light emitting micro LED 33 in the translucent micro LED display for XR glasses according to the first embodiment, a blue light emitting or ultraviolet light emitting micro LED 39 is used. The micro LED 39 has a similar configuration to the micro LEDs 31 to 33. A red phosphor 95 is provided to cover the micro LED 39 in the red light emitting region, a green phosphor 96 is provided to cover the micro LED 39 in the green light emitting region, and a blue phosphor 97 is provided to cover the micro LED 39 in the blue light emitting region. A light reflecting film 60 is provided to cover the red phosphor 95, the green phosphor 96, and the blue phosphor 97. The transparent resin layers 50, 80, the cylinder 70, and the micro lens 90 are the same as those in the translucent micro LED display for XR glasses according to the first embodiment.

[0051] [Operation of pixel 20 in a translucent micro LED display for XR glasses] As shown in FIG. 7, when the micro LED 39 is energized, blue light or ultraviolet light is emitted to the outside. The emitted blue light or ultraviolet light excites the red phosphor 95, the green phosphor 96, and the blue phosphor 97, which generate red light, green light, and blue light, respectively. The red light, green light, and blue light thus generated that head toward the aperture 71 passes through the transparent resin layer 80 inside the aperture 71, and then passes through the transparent resin layer 80 on top of that to enter the micro lens 90. The light that has entered the micro lens 90 is emitted from the micro lens 90 as parallel light parallel to the central axis of the micro lens 90. The light that does not head toward the aperture 71 is reflected by the light reflecting film 60, and most of it eventually heads toward the aperture 71 and is finally emitted to the outside as parallel light.

[0052] According to the second embodiment, it is possible to obtain the same advantages as those of the first embodiment.

[0053] Third embodiment [Semi-transparent micro LED display for XR glasses] Fig. 10 shows a cross-sectional view of a pixel arrangement of a semi-transparent micro LED display for XR glasses according to a third embodiment. Fig. 11 shows a collimator used in the semi-transparent micro LED display for XR glasses. Fig. 12 is a perspective view of one pixel of the semi-transparent micro LED display for XR glasses.

[0054] 10 to 12, in this semi-transparent micro LED display for XR glasses, a collimator 100 as shown in Fig. 11 is provided above each of the red light emitting micro LED 31, the green light emitting micro LED 32, and the blue light emitting micro LED 33, and the light reflecting film 60 is provided only on the side surface of the transparent resin layer 50, and the cylinder 70 and the micro lens 90 in the first embodiment are not provided, which is different from the first embodiment. The other points are the same as those of the first embodiment.

[0055] 11, the collimator 100 is made by bundling a number of elongated transparent pillars 101 in the shape of a regular square pillar so that their sides are in close contact with each other, and has a regular square pillar shape as a whole. The sides of each transparent pillar 101 are covered with a light absorbing film 102. The material of the transparent pillars 101 is, for example, a silicon-based resin or an acrylic-based resin, and the light absorbing film is, for example, a black color resist, but is not limited to these.

[0056] [Operation of pixel 20 in a translucent micro LED display for XR glasses] As shown in FIG. 10, when the micro LEDs 31-33 are energized, the light emitted from the micro LEDs 31-33 travels in various directions, but the light that travels in a direction parallel to the central axis of the transparent column 101 among the light incident on the lower end surface of any of the transparent columns 101 of the collimator 100 travels inside the transparent column 101 and is emitted to the outside from the upper end surface. The light that travels in a direction different from the direction parallel to the central axis of the transparent column 101 among the light incident on the lower end surface of any of the transparent columns 101 of the collimator 100 is absorbed by the light absorbing film 102 on the side surface of the transparent column 101. The light that does not travel to the collimator 100 among the light emitted from the micro LEDs 31-33 is reflected by the light reflecting film 60, and finally, the light that travels in a direction parallel to the central axis of the transparent column 101 among the light incident on the lower end surface of any of the transparent columns 101 of the collimator 100 travels inside the transparent column 101 and is emitted to the outside from the upper end surface. In this way, parallel light is emitted from the collimator 100 to the outside.

[0057] According to the third embodiment, it is possible to obtain the same advantages as those of the first embodiment.

[0058] Fourth embodiment [Semi-transparent micro LED display for XR glasses] The translucent micro LED display for XR glasses according to the fourth embodiment is different from the translucent micro LED display for XR glasses according to the third embodiment in that the collimator 100 shown in FIG. 13 is used instead of the collimator 100 in the translucent micro LED display for XR glasses according to the third embodiment, and otherwise is similar to the third embodiment.

[0059] As shown in Fig. 13, the collimator 100 is a bundle of elongated cylindrical transparent columns 101 with their sides in close contact with each other, and has an overall shape of a regular square column. The sides of each column 101 are covered with a light absorbing film 102. In this collimator 100, of the light incident on the lower end surface of any of the transparent columns 101, the light traveling in a direction parallel to the central axis of the transparent column 101 travels inside the transparent column 101 and is emitted to the outside from the upper end surface, and of the light incident on the lower end surface of any of the transparent columns 101 of the collimator 100, the light traveling in a direction different from the direction parallel to the central axis of the transparent column 101 is incident on the light absorbing film 102 on the side of the transparent column 101 and absorbed.

[0060] [Operation of pixel 20 in a translucent micro LED display for XR glasses] The operation of the pixel 20 of this translucent micro LED display for XR glasses is similar to that of the third embodiment, except that the collimator 100 shown in FIG. 11 is replaced by the collimator 100 shown in FIG.

[0061] According to the fourth embodiment, it is possible to obtain the same advantages as those of the first embodiment.

[0062] Fifth embodiment [Semi-transparent micro LED display for XR glasses] The fifth embodiment of the translucent micro LED display for XR glasses is different from the third embodiment in that the collimator 100 in the translucent micro LED display for XR glasses is replaced with the collimator 100 shown in FIG. 14, and otherwise similar to the third embodiment.

[0063] As shown in Fig. 14, the collimator 100 has a plurality of (three in Fig. 14) cylindrical transparent layers 103 arranged coaxially around a cylindrical transparent column 101 in close contact with each other. The sides of the transparent column 101 and the transparent layer 103 are covered with a light absorbing film 102. In this collimator 100, among the light incident on one end face of either the transparent column 101 or the transparent layer 103, the light traveling in a direction parallel to the central axis of the collimator 100 travels inside and is emitted to the outside from the other end face, and among the light incident on one end face of either the transparent column 101 or the transparent layer 103 of the collimator 100, the light traveling in a direction different from the direction parallel to the central axis of the collimator 100 is incident on the light absorbing film 102 on the side face of the transparent column 101 and the transparent layer 103 and absorbed.

[0064] [Operation of pixel 20 in a translucent micro LED display for XR glasses] The operation of the pixel 20 of this translucent micro LED display for XR glasses is similar to that of the third embodiment, except that the collimator 100 shown in FIG. 11 is replaced by the collimator 100 shown in FIG.

[0065] According to the fifth embodiment, it is possible to obtain the same advantages as those of the first embodiment.

[0066] Sixth embodiment [Semi-transparent micro LED display for XR glasses] FIG. 15 is a cross-sectional view showing a semi-transparent micro LED display for XR glasses according to the sixth embodiment, and is a schematic diagram showing an arrangement of pixels.

[0067] As shown in FIG. 15, in this translucent micro LED display for XR glasses, similarly to the translucent micro LED display for XR glasses according to the second embodiment, a micro LED 39 emitting blue light or ultraviolet light is used instead of the micro LEDs 31 to 33, and a red phosphor 95 is provided to cover the micro LED 39 in the red light emission region, a green phosphor 96 is provided to cover the micro LED 39 in the green light emission region, and a blue phosphor 97 is provided to cover the micro LED 39 in the blue light emission region. A light reflecting film 60 is provided to cover the side surfaces of the red phosphor 95, the green phosphor 96, and the blue phosphor 97. A first collimator layer 110, a second collimator layer 120, and a third collimator layer 130 are provided on the red phosphor 95, the green phosphor 96, the blue phosphor 97, and the transparent resin layer 50. The first collimator layer 110 is formed by embedding a light absorbing film 112 in a two-dimensional lattice shape so as to penetrate the transparent resin layer 111 above the micro LED 39, and the portion in which the light absorbing film 102 is embedded functions as a collimator. The second collimator layer 120 is formed by embedding a light absorbing film 122 in a two-dimensional lattice pattern so as to penetrate the transparent resin layer 121 above the micro LEDs 39, and the portion where the light absorbing film 102 is embedded functions as a collimator. The light absorbing film 122 of the second collimator layer 120 is laterally shifted from the light absorbing film 112 of the first collimator layer 110 by a distance of about half the interval of the light absorbing film 112. The third collimator layer 130 is formed by embedding a light absorbing film 132 in a two-dimensional lattice pattern so as to penetrate the transparent resin layer 131 above the micro LEDs 39, and the portion where the light absorbing film 132 is embedded functions as a collimator. The light absorbing film 132 of the third collimator layer 130 is located in the middle between the light absorbing film 112 of the first collimator layer 110 and the light absorbing film 122 of the second collimator layer 120. FIG. 16A shows the appearance of the light absorbing film 112 of the first collimator layer 110. FIG. 16B shows the positional relationship between the light absorbing film 112 of the first collimator layer 110 and the light absorbing film 122 of the second collimator layer 120.FIG. 16C shows the positional relationship between the light absorbing film 112 of the first collimator layer 110, the light absorbing film 122 of the second collimator layer 120, and the light absorbing film 132 of the third collimator layer .

[0068] [Operation of pixel 20 in a translucent micro LED display for XR glasses] As shown in FIG. 15, when the micro LED 39 is energized, blue light or ultraviolet light is emitted to the outside. The emitted blue light or ultraviolet light excites the red phosphor 95, the green phosphor 96, and the blue phosphor 97, respectively, to generate red light, green light, and blue light, respectively. The light thus generated, among the red light, green light, and blue light, which is incident on the lower end surface of the first collimator layer 110, proceeds in a direction parallel to the central axis of the collimator portion and proceeds inside the transparent column in the shape of a regular square column surrounded by the light absorbing film 112, is emitted from the other end surface, and is incident on the lower end surface of the second collimator layer 120. The light incident on the lower end surface of the second collimator layer 120 is collimated to a narrower angle range due to a decrease in the aperture ratio caused by the position of the light absorbing film 122 being slightly shifted laterally from the light absorbing film 112, and an increase in the thickness of the collimator layer, and is emitted from the upper end surface of the second collimator layer 120 and is incident on the lower end surface of the third collimator layer 130. The light incident on the lower end surface of the third collimator layer 130 is collimated to a narrower angle range due to a decrease in the aperture ratio caused by a slight lateral shift of the position of the light absorbing film 132 from the light absorbing film 122 and an increase in the thickness of the collimator layer, and is output from the upper end surface of the third collimator layer 130. Thus, the light output from the upper end surface of the third collimator layer 130 is emitted to the outside as parallel light limited to a narrow angle range. Stacking the collimator layers in multiple layers in this way has the effect of lowering the aspect ratio (ratio of the diameter of the aperture to the layer thickness), and can reduce the difficulty of manufacturing.

[0069] According to the sixth embodiment, it is possible to obtain the same advantages as those of the first embodiment.

[0070] Seventh embodiment [Semi-transparent micro LED display for XR glasses] Fig. 17 is a cross-sectional view showing a pixel arrangement of a semi-transparent micro LED display for XR glasses according to a seventh embodiment, and Fig. 18 is a perspective view showing one pixel of the semi-transparent micro LED display for XR glasses according to the seventh embodiment.

[0071] As shown in Figures 17 and 18, this semi-transparent micro LED display for XR glasses is different from the first embodiment in that one micro lens 90 is provided for each pixel, and the cylinder 70 is provided to collect light that travels in a specific direction among the light emitted from each of the micro LEDs 31, 32, and 33. The rest is the same as the first embodiment. The aperture 71 inside the cylinder 70 and the micro lens 90 form one collimator.

[0072] [Operation of pixel 20 in a translucent micro LED display for XR glasses] As shown in FIG. 17, when the micro LEDs 31, 32, and 33 are energized, each of the micro LEDs 31, 32, and 33 emits light, and the light passes through the n-type semiconductor layer 34 and is emitted to the outside. The emitted light travels in various directions, but the light heading toward the inside of the cylinder 70 passes directly through the transparent resin layer 80 inside the cylinder 70, and then passes through the transparent resin layer 80 on top of that to enter the micro lens 90. Since the focal point of the micro lens 90 is inside the cylinder 70, the light that enters the micro lens 90 becomes parallel light of the central axis of the micro lens 90 and is emitted from the micro lens 90. The light that does not head toward the inside of the cylinder 70 is reflected by the light reflecting film 60, and most of the light ultimately heads toward the inside of the cylinder 70 and is emitted to the outside as parallel light.

[0073] According to the seventh embodiment, it is possible to obtain the same advantages as those of the first embodiment.

[0074] Eighth embodiment [XR Glasses] 19 is a right side view showing the XR glasses according to the eighth embodiment. Since the XR glasses are configured symmetrically, the configuration of the left eye side will be described below.

[0075] As shown in FIG. 19, in the XR glasses, a translucent micro LED display 300 having the same configuration as that of the first embodiment is provided as a display unit for the left eye behind a transparent windshield (not shown) on the left eye side integrated with the frame 200. However, since the radiation angle of light from each pixel of the translucent micro LED display 300 is small, 5 degrees or less, preferably 0.1 to 2.0 degrees, the display surface is curved by utilizing the flexibility of the wiring board 10 so that the light from each pixel enters the pupil. Here, in the translucent micro LED display 300, the micro LEDs 31 to 33 on the wiring board 10 are simply represented as squares, and the collimator thereon is represented as a cylinder 70 only, and the micro lenses 90 and the like are omitted from the illustration, thus greatly simplifying the illustration. A control circuit unit 210 for controlling the operation of the translucent micro LED display 300 is provided on the ear hook unit 200a on the left side of the frame 200 so as to surround the outer periphery of the ear hook unit 200a. A flexible wiring 220 is provided on the side of the ear hook 200a. The flexible wiring 220 wires between the control circuit 211 and the translucent micro LED display 300. The windshield excluding the part corresponding to the translucent micro LED display 300 can be used as a wiring area. A battery (such as a lithium ion battery) used as a power source is attached to any part of the frame 200 (such as the ear hook 200a). A nose pad 230 is provided on the nose side of the frame 200. If necessary, a left eye sensor is provided on the frame 200, for example, directly above the windshield. The left eye sensor includes, for example, one or more of a left eye imaging element (such as a CMOS image sensor or CCD), LiDAR, an illuminance sensor, an acceleration sensor, a gyro sensor, a geomagnetic sensor, and a near-infrared camera for eye tracking.

[0076] FIG. 20 shows the relative positional relationship with the left eye 400 when the XR glasses are worn in front of the user's eyes. The semi-transparent micro LED displays 300 constituting the left eye display unit and the right eye display unit respectively have an area that covers almost the entire field of view of the user. The left eye 400 has an eyeball 410, a lens 420, a cornea 430, and a retina 440. If the eyeball 410 is assumed to be a sphere, its diameter is about 24 mm. The lens 420 has a diameter of about 9 mm and a thickness of about 4 mm. The retina 440 extends over a length of 30 to 40 mm.

[0077] The collimated light emitted from each pixel is designed to converge to one point due to the curvature of the display surface, etc., and the convergence point is set between the center of the crystalline lens 420 and the center of the eyeball 410. The viewing angle of the image (= the angular range in which the display image is visible) and the eyebox vary depending on the position of the convergence point. The viewing angle and the eyebox are in an inverse relationship, and the closer the convergence point of the light is to the center of the eyeball 410, the wider the eyebox and the narrower the viewing angle. If the distance between the display surface and the cornea 430 is 12 mm and the convergence point of the light is set near the center of the eyeball 410 (= ~12 mm from the cornea 430), depending on the opening of the pupil (not shown), the viewing angle is ~19 degrees when the pupil diameter is 2 mm and ~67 degrees when the pupil diameter is 8 mm. If the convergence point of the light is to the center of the crystalline lens 420, the viewing angle will be wider and the eyebox will be narrower. A practical viewing angle and eyebox can be achieved by adjusting the convergence point of light, but for example, by adding an eye-tracking function to the device and having the angle and position of the display follow the movement of the pupil, it is possible to achieve both a wider eyebox and a wider viewing angle.

[0078] [XR Glasses Operation] As shown in FIG. 20, in the XR glasses, light from the outside world that arrives from a distance passes through the translucent micro LED display 300 and reaches the eyeball 410, passes through the crystalline lens 420, and forms an image on the retina 440. Assuming that the pupil is wide open at 8 mm and that it is possible to focus at a distance of 23 cm to 5 m, the radiation angle of light entering the pupil is 2.0 degrees at 23 cm and 0.1 degrees at 5 m. The radiation angle of 5 degrees is the radiation angle of light that enters the eye from about 9.2 cm away when the pupil diameter is 8 mm, and is within the range that some people can focus. Therefore, if the radiation angle of light from the pixel is 5 degrees or less, preferably in the range of 0.1 to 2.0 degrees, it is considered that a user with normal eyesight can recognize the image displayed on the translucent micro LED display 300. In FIG. 20, the light from one pixel of the translucent micro LED display 300 and the light from the adjacent pixel are both narrowed by the collimator to a radiation angle of 5 degrees or less, preferably 0.1 to 2.0 degrees, so that they are equivalent to external light arriving from a distance, and form an image on the retina 440 without mixing with each other. Therefore, it is considered that a person with normal eyesight can recognize an image displayed on the translucent micro LED display 300. On the other hand, as shown in FIG. 21, in a translucent micro LED display without a collimator on the pixel, the spread (radiation angle) of the light from the pixel is large, so that the light from the adjacent pixel cannot be separated, and the light reaches the retina 440 in a mixed state, so that the image displayed on the translucent micro LED display is unclear and blurred.

[0079] According to the eighth embodiment, by using a translucent micro LED display 300 having a configuration similar to that of the first embodiment as the left eye display unit and the right eye display unit, it is possible to realize excellent XR glasses that can focus images on the retina of the user's eye in pixel units.

[0080] Ninth embodiment [XR Glasses] 22 is a right side view showing the XR glasses according to the ninth embodiment. Since the XR glasses are configured symmetrically, the configuration of the left eye side will be described below.

[0081] As shown in Fig. 22, the XR glasses are different from the XR glasses according to the eighth embodiment in that a vision correction lens 500 is provided inside the translucent micro LED display 300, but otherwise are similar to the eighth embodiment. The vision correction lens 500 is a convex lens for hyperopia (farsightedness) correction and a concave lens for myopia correction, and Fig. 22 shows a case where the vision correction lens 500 is a concave lens as an example. The vision correction lens 500 may be provided outside the translucent micro LED display 300.

[0082] FIG. 23 shows the relative positional relationship with respect to the left eye 400 when the XR glasses are worn in front of the user's eyes.

[0083] [XR Glasses Operation] As shown in FIG. 23, the operation of the XR glasses is similar to that of the XR glasses according to the eighth embodiment, except that focusing is achieved by a combination of a crystalline lens 420 and a vision corrective lens 500.

[0084] According to the ninth embodiment, even when the vision corrective lens 500 is used, the same advantages as those of the eighth embodiment can be obtained.

[0085] Tenth embodiment [Display for VR glasses] 24 is a cross-sectional view showing a schematic arrangement of pixels of a display for VR glasses according to a tenth embodiment. The display for VR glasses is made of an organic EL display or a liquid crystal display (LCD).

[0086] 24, in this VR glasses display, a pixel array is provided in which pixels 20 are arranged in a two-dimensional matrix on a flexible and transparent wiring substrate 10. An external light blocking film 600 is provided on the back surface of the wiring substrate 10 (the surface opposite to the pixels 20).

[0087] FIG. 24 shows a red light emitting portion 701, a green light emitting portion 702, and a blue light emitting portion 703 of three sub-pixels constituting one pixel. The light emitting portions 701, 702, and 703 are laminated structures of organic EL elements in an organic EL display, and transparent conductive films, alignment films, liquid crystals, color filters, and the like formed on a flexible transparent substrate in a liquid crystal display. A collimator 710 is provided on each of the light emitting portions 701, 702, and 703. The collimator 710 is for narrowing the radiation angle of light emitted from the light emitting portions 701, 702, and 703 to 5 degrees or less, preferably 0.1 to 2.0 degrees. The collimator 710 may be one consisting of the aperture 71 of the cylinder 70 and the microlens 90 used in the first embodiment, or may be the collimator 100 used in the third embodiment.

[0088] [Operation of pixel 20 in VR glasses display] As shown in FIG. 24, the light emitted from each of the light emitting portions 701, 702, and 703 is narrowed by a collimator 710 to a radiation angle of 5 degrees or less, preferably 0.1 to 2.0 degrees, and is finally emitted to the outside as approximately parallel light.

[0089] According to the display for VR glasses of the tenth embodiment, when an organic electroluminescence display or a liquid crystal display is used, a collimator provided for each pixel 20 of the pixel array can narrow the radiation angle of light from the pixel to 5 degrees or less, thereby making it possible to display images with sufficient resolution.

[0090] Eleventh embodiment [VR glasses] 25 is a right side view showing the VR glasses according to the 11th embodiment. Since the VR glasses are configured symmetrically, the configuration of the left eye side will be described below.

[0091] As shown in Fig. 25, in these VR glasses, a display 800 having a configuration similar to that of the tenth embodiment is provided as a left-eye display unit integral with the transparent windshield unit (not shown) on the left eye side integrated with the frame 200, behind the windshield unit. However, since the radiation angle of light from each pixel of the display 800 is small, 5 degrees or less, preferably 0.1 to 2.0 degrees, the display surface is curved so that the light from each pixel enters the pupil. Other aspects of these VR glasses are the same as those of the tenth embodiment.

[0092] FIG. 26 shows the relative positional relationship with respect to the left eye 400 when the VR glasses are worn in front of the user's eyes.

[0093] [VR glasses operation] As shown in FIG. 26, the operation of the VR glasses is similar to that of the XR glasses according to the eighth embodiment, except that the external light blocking film 600 prevents light from the outside world from passing through the display 800.

[0094] According to the eleventh embodiment, by using a display 800 having a configuration similar to that of the tenth embodiment as the left eye display unit and the right eye display unit, it is possible to realize excellent VR glasses that can form an image on the retina of the user's eye in pixel units.

[0095] Twelfth embodiment [XR Glasses] The XR according to the twelfth embodiment is a combination of an XR glass body and a contact lens with a collimating function that is attached to the cornea of ​​the eye.

[0096] 27 is a right side view showing the XR glasses main body 900. Since this XR glasses main body 900 is configured symmetrically, the configuration on the left eye side will be described below.

[0097] 27, the XR glasses body 900 has a translucent micro LED display 910 for XR glasses that does not have the collimator in the translucent micro LED display 300 for XR glasses according to the eighth embodiment. That is, the translucent micro LED display 910 for XR glasses does not have the cylinder 70, the transparent resin layer 70, and the micro LEDs 90. The other configurations of the XR glasses body 900 are the same as those in the eighth embodiment.

[0098] Figures 28A, 28B, 28C and 28D show a contact lens 1000 with collimating function, with Figures 28A and 28B being a plan view and a cross-sectional view, respectively, of the contact lens 1000 with collimating function, and Figures 28C and 28D being a plan view and a side view, respectively, of a transparent pillar 1100 of a transparent pillar assembly that constitutes the contact lens 1000 with collimating function.

[0099] As shown in Figures 28A and 28B, the collimating contact lens 1000 has an overall bowl-shaped curved shape that corresponds to the curvature of the surface of the cornea.

[0100] In the center of the collimating contact lens 1000, a large number of transparent columns 1100 in the shape of a regular hexagonal truncated pyramid as shown in Fig. 28C and Fig. 28D are arranged in a honeycomb shape with their sides in close contact with each other to form a transparent column assembly. The curved outer and inner surfaces of the collimating contact lens 1000 are smoothly formed. The diagonal length of the outer surface of the transparent column 1100 is D Outer , the diagonal length on the inner surface is D Inner Then, D Outer >D Inner It is.

[0101] As shown in Fig. 28B, the light passing through each transparent pillar 1100 constituting this transparent pillar assembly is configured to converge to one point (convergence point). The convergence point where the light passing through each transparent pillar 1100 converges is set to be near the center of the crystalline lens 420 when this contact lens 1000 with collimating function is attached to the cornea 430.

[0102] The collimating contact lens 1000 is configured so that the radiation angle of light from each transparent pillar 1100 is within 5 degrees. As shown in Figures 28C and 28D, if the diagonal length of the transparent pillar 1100 is D, its length is L, and half the radiation angle is θ / 2, then, for example, if D = 4 μm and L = 92 μm, then light with a radiation angle θ of within 5 degrees (±2.5 degrees) will pass through this collimating contact lens 1000.

[0103] The transparent material of the collimating contact lens 1000 is, for example, thermoplastic acrylic resin (PMMA) or polycarbonate (PC) resin, and the light absorbing film on the side of the transparent column 1100 can be made of black color resist or a material made of a thermoplastic resin mixed with carbon black.

[0104] To achieve a radiation angle of 5 degrees or less, the aspect ratio of the transparent columns 1100 serving as collimators must be increased to approximately 23 or more, and it is difficult to form them all at once. For this reason, for example, as shown in FIG. 29A, a flat and stretchable transparent layer 1200 is formed having a transparent column assembly consisting of transparent columns 1100 in the shape of regular hexagonal columns whose side walls are formed of a light absorbing film (not shown), and this is stacked in multiple layers (three layers in this example) as shown in FIG. 29B to form a thick film of transparent column assembly having a collimating function with a sufficient thickness to keep the radiation angle within 5 degrees. The thick film is cut into a disk shape of an appropriate size for a contact lens, and is heated and molded to curve it. This state is shown in FIG. 29C. Through this process, the opening area of ​​the transparent column assembly becomes a shape that is wide on the outside of the curved surface and narrow on the inside. The convergence point of the light passing through the transparent column assembly can be adjusted by the radius of curvature of the curve at this time. When the convergence point is to be near the center of the crystalline lens, the radius of curvature is set to approximately the distance between the surface of the cornea 430 and the center of the crystalline lens 420. When the curved shape of the thick film differs from the shape of the cornea 430, as shown in FIG. 29D, the excess portion of the inner curved surface of the thick film is ground to match the shape of the cornea 430. Grinding of the outer curved surface is not necessary when the curvature is the same as that of the cornea 430, but FIG. 29D shows a case where grinding of the outer curved surface is performed. In this manner, the collimating contact lens 1000 is manufactured. If necessary, the outer periphery of the collimating contact lens 1000 is chamfered as shown in FIG. 29E. FIG. 30 shows the state in which the collimating contact lens 1000 shown in FIG. 29E is attached to the cornea 430.

[0105] FIG. 31 shows the state when the user wears the XR glasses main body 900 in front of the eye and the collimating contact lens 1000 is placed on the cornea 430 to configure the XR glasses.

[0106] [XR Glasses Operation] As shown in Fig. 31, the light from the pixels of the translucent micro LED display 910 for XR glasses has a large radiation angle because there is no collimator, but when it enters the contact lens 1000 with collimation function, the radiation angle is substantially narrowed to within 5 degrees, so that the light from adjacent pixels is imaged on the retina without significantly mixing with each other. As shown in Fig. 32, even if the line of sight is directed downward and the eyeball 410 rotates, the light from the pixels of the translucent micro LED display 910 for XR glasses has a large radiation angle, and light with an angle that can enter the pupil is present in a wide range, so a wide eyebox can be maintained.

[0107] According to the XR glasses of the twelfth embodiment, even if a collimator-less translucent micro LED display 910 for XR glasses is used, the collimating contact lens 1000 can effectively narrow the light emission angle from the pixel to 5 degrees or less, making it possible to display images with sufficient resolution.

[0108] Although the embodiment of the present invention has been specifically described above, the present invention is not limited to the above-mentioned embodiment, and various modifications based on the technical concept of the present invention are possible.

[0109] For example, the numerical values, configurations, shapes, materials, methods, etc. given in the above-described embodiments are merely examples, and numerical values, configurations, shapes, materials, methods, etc. different from these may be used as necessary. [Explanation of symbols]

[0110] 10...wiring board, 20...pixel, 31...red-emitting micro LED, 32...green-emitting micro LED, 33...blue-emitting micro LED, 62...left eye, 200...frame, 200a...ear hook, 210...control circuit, 220...flexible wiring, 300...semi-transparent micro LED display, 500...vision correction lens, 600...external light blocking film, 701, 702, 703...light-emitting part, 710...collimator, 800...display, 900...XR glasses main body, 910...semi-transparent micro LED display for XR glasses, 1000...contact lens with collimation function, 1100...transparent column

Claims

1. The contact lens has a transparent pillar assembly in which a plurality of transparent pillars are arranged to act as collimators, with a transmittance of 50% or more and a radiation angle of 5 degrees or less for light emitted from an arbitrary point, and the light transmitted through each transparent pillar is converged to a convergence point.

2. 2. The contact lens with collimating function according to claim 1, wherein said convergence point is located near the center of the crystalline lens when said contact lens is attached to the cornea.

3. The XR glasses use a contact lens with a collimating function, which has a transparent column assembly in which multiple transparent columns are arranged as collimators, with a transmittance of 50% or more and a radiation angle of 5 degrees or less for light emitted from an arbitrary point, and in which the light transmitted through each transparent column converges to a convergence point.

4. an XR glasses main body having a left-eye display section and a right-eye display section each of which is made up of a translucent micro light-emitting diode display having a pixel array in which one pixel is formed by at least three or more sub-pixels and one or more micro light-emitting diodes included in each of the sub-pixels, the aperture ratio of the pixel being 10% or more; a contact lens with a collimating function, the contact lens having a transparent column assembly in which a plurality of transparent columns are arranged as collimators, the transparent columns having a transmittance of 50% or more and a radiation angle of 5 degrees or less for light emitted from any point on the left-eye display unit and the right-eye display unit, the light having passed through each transparent column being converged to a convergence point; XR glasses having

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