WO2020134521A1

WO2020134521A1 - Light-transmissive display device and augmented reality display

Info

Publication number: WO2020134521A1
Application number: PCT/CN2019/114053
Authority: WO
Inventors: 贾芳凯
Original assignee: 永众科技股份有限公司
Priority date: 2018-12-28
Filing date: 2019-10-29
Publication date: 2020-07-02
Also published as: CN111381372A

Abstract

A light-transmissive display device (43) comprises: a thin transparent substrate (44) on which a metal circuit is arranged; a plurality of micro LED dies (45), spaced apart from one another and arranged on the thin transparent substrate, wherein the total area of the micro LED dies is less than one tenth of the area of the thin transparent substrate, the main light emission wavelengths of the micro LED dies are respectively red, blue and green, and each die has one main light emission direction; a transparent cover plate (47); and a transparent bonding layer (46), wherein the transparent bonding layer is made of a transparent colloidal substrate, and the transparent bonding layer is sealed between the thin transparent substrate and the transparent cover plate. Further disclosed is an augmented reality display (40) having the light-transmissive display device.

Description

Penetrating display device and augmented reality display

Technical field

The present invention relates to a transmissive display device. In addition, the present invention also relates to an augmented reality display with a transmissive display device.

Background technique

The transmissive display device refers to the device has the characteristics of light transmission, which allows the viewer to see the display screen or the image displayed on the display, but also allows the viewer to see the actual external scene behind the display device, so that the virtual image and The physical world can combine observations, so it is often used in applications such as vehicle windows, building windows, display windows, and even games.

At present, the transmissive display device is roughly completed by thin film transistor liquid crystal display (Thin film transistor liquid crystal display (TFT-LCD), field color sequential display (Field-Sequential-Color), AMOLED panel, etc. TFT-LCD is borrowed By setting a transparent area without color filters, using external or side-entry light sources as the backlight; when light passes through the panel, the area with color filters is displayed, and the area without color filters is displayed Rear view. However, the transparency of the display in the above method is still limited. Therefore, some developers have proposed to omit the color filter and implement the field color sequence method. The method is to use the side-in RGB light source to quickly flash and circulate, and cooperate with the liquid crystal to quickly Display the corresponding pixel position, and form a pattern through the human eye with the characteristic of persistence of vision, replacing the color filter.

Although the field color sequence method can replace the polarizer, the liquid crystal needs to have a very fast response speed, and the response time of the field color sequence method is still relatively slow. Therefore, there is a self-luminous AMOLED to realize the transmissive display device, and the way to achieve through the AMOLED panel is to use a transparent material as the yin and yang poles, and the light emitted by the OLED itself is directed to the yin and yang poles at the same time, and then to achieve Transparent display effect. However, the display using OLED as the pixel directly, the resolution is limited by the size of the OLED and cannot be greatly improved.

On the other hand, the technologies of Virtual Reality (VR) and Augmented Reality (AR, also known as Augmented Reality) are becoming more and more mature nowadays. The common virtual reality is to completely obscure the field of vision through a helmet or an eye mask, and provide visual sense through virtual images Simulation, and when the user moves, the computer can immediately perform calculations to change the simulation screen, so that the user feels immersive and produces a sense of presence; augmented reality is to add virtual information to the actual life scene. Common examples are Google Glass and car vehicles. Google Glass uses a 45-degree angle prism to reflect the light generated by the mini projector into the human eye, mixing the projected light with real-life light, and mixing the virtual image with the actual image when the retina is imaged; The car's on-board system projects or reflects information such as speed and condition on the windshield, so that the driver can avoid bowing and distracting to improve driving safety, but the projection and reflection methods often require a large distance Or space, so the vehicle-mounted system is often limited to the space in the vehicle, and can only project a small range of virtual images onto the windshield.

Therefore, through the advancement of LED technology, how to properly use micro-light emitting diodes (micro LEDs) with a smaller size as a light source, a transmissive display device and an augmented reality display with the device are proposed to make the transmissive display device The light transmission rate is greatly improved, and the resolution of the display device is further greatly improved, which becomes an urgent problem to be solved by the present invention. In particular, the liquid crystal or other light-shielding materials can be used as an augmented reality or virtual reality display device to effectively increase the flexibility of the product.

Summary of the invention

In view of the above deficiencies of the prior art, according to the embodiments of the present invention, it is desirable to provide a transmissive display device, which aims to achieve the following objectives: (1) By reducing the area occupied by the LED die, the display device’s Light transmittance; (2) By reducing the pixel size, the resolution of the display device is greatly improved; (3) With the additional adjustable light shield, the light transmittance of the display device can be adjusted to increase the flexibility of product use .

In addition, the present invention also hopes to provide an augmented reality display with a penetrating display device, which aims to achieve the following objectives: (1) superimpose high-resolution virtual images and actual images to create more realistic enhancements Reality; (2) With adjustable shading plate, the transmittance can be adjusted, and even converted into a virtual reality display.

To achieve the above objective, a penetrating display device provided by the present invention includes:

A thin light-transmitting substrate with metal circuits;

A plurality of Micro LED dies are spaced apart from each other on the thin transparent substrate, and the total area of the Micro LED dies is less than one tenth of the area of the thin transparent substrate. The main emission wavelengths of the Micro LED dies are red , Blue and green, and each has a main light direction;

A cover light-transmitting plate for the light beam of the Micro LED chip to penetrate toward the main light emitting direction;

A light-transmissive bonding layer is made of a light-transmissive adhesive substrate. The light-transmissive bonding layer is sealed between the thin light-transmitting substrate and the cover light-transmitting plate.

The present invention provides an augmented reality display with a penetrating display device, including:

A wearable body with a specific curvature; an augmented reality processing device provided on the wearable body;

A penetrating display device is provided on the wearable body and connected to the augmented reality processing device. The penetrating display device includes:

A thin light-transmitting substrate with a metal circuit layout, the thickness is less than 1.0mm, and has a curvature corresponding to the wearing body;

A cover light-transmitting plate for the light beam emitted by the Micro LED die toward the main light-emitting direction to penetrate, the cover light-transmitting plate has a curvature corresponding to the thin light-transmitting substrate;

Compared with the prior art, the transmissive display device provided by the present invention uses a thin light-transmitting substrate with high light transmittance, a cover light-transmitting plate and a light-transmitting bonding layer, together with Micro LED dies spaced apart from each other, The transmissive display device can have a high light transmittance, and because the size of the Micro LED die is extremely small, the transmissive display device can accommodate more die than the conventional display, and the transmissive display device has a high The image quality of the resolution is further matched with the shading plate to increase the flexibility of the product. In addition, the present invention applies a penetrating display device to an augmented reality display, and can superimpose high-resolution virtual images and actual images, so that the effect of augmented reality is closer to the reality. In particular, you can choose to add a shading plate and adjust it freely The light transmittance can be converted into a virtual reality display according to user needs.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of a transmissive display device provided by a first preferred embodiment of the present invention.

2 is a cross-sectional view of the embodiment of FIG.

3 is a schematic diagram of a transmissive display device provided by a second preferred embodiment of the present invention.

FIG. 4 is a structural diagram of a first preferred embodiment of an augmented reality display with a penetrating display device according to the present invention.

FIG. 5 is a schematic diagram of the external structure of the embodiment of FIG. 4.

6 is a cross-sectional view of the embodiment of FIG. 5.

7 is a cross-sectional view of a second preferred embodiment of an augmented reality display with a penetrating display device according to the present invention.

Among them: 11 is windshield; 12, 32, 43 are penetrating display devices; 13, 33, 44 are thin transparent substrates; 14, 34, 45 are Micro LED chips; 15, 35, 46 are transparent Bonding layer; 16, 36, and 47 are cover light-transmitting plates; 20, 30, and 50 are users; 31 is glass windows; 37 and 49 are adjustable shading plates; 38 is a controller; 40 is an augmented reality display; 41 It is a wearable body; 42 is an augmented reality processing device; 48 is an optical lens group.

detailed description

The present invention will be further described below with reference to the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the protection scope of the present invention. After reading the content described in the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

First preferred embodiment (penetrating display device)

The first preferred embodiment of the transmissive display device of the present invention is shown in FIG. 1. In this embodiment, the transmissive display device 12 is provided on the windshield 11 of a car. The transmissive display device 12 displays the vehicle speed, Important driving information such as vehicle conditions and navigation, and the visible light transmission rate of the transmissive display device 12 is high, so it will not block the driver's sight, and the driving information is displayed on the windshield 11, the driver does not need to look down The driving information on the instrument panel avoids ignoring the rapid changes in the external environment during head-up and head-down, and reduces the discomfort caused by constant adjustment of the eye focal length.

FIG. 2 is a cross-sectional view of the embodiment of FIG. 1. For convenience of showing the corresponding relationship, the transmissive display device 12 and the windshield 11 are in a separated state, and the transmissive display device 12 has a corresponding to the windshield 11 Curvature, so that the two can have a good degree of adhesion. The transmissive display device 12 includes a thin light-transmitting substrate 13 with a thickness of less than 1.0 mm, a plurality of Micro LED dies 14, a light-transmitting bonding layer 15, and a cover light-transmitting plate 16; the thin light-transmitting substrate 13 has extremely fine layout Metal circuit for electrical connection of Micro LED dies 14 spaced apart from each other on the thin light-transmissive substrate 13, the length and width of the Micro LED dies 14 are less than 100 microns, and the luminous intensity difference according to the positive solid angle of the die In order to define a solid angle range, which is usually the main light-emitting direction of the projectile, the main light-emitting direction of each die in this embodiment faces the driver's eye on the left side of the diagram, thereby providing driver image data.

Each pixel of the transmissive display device 12 is composed of crystal grains whose main emission wavelengths are red, blue, and green, respectively, so that the screen of the transmissive display device 12 directly displays the reference color of each Micro LED die, thereby highlighting The vividness of the color of the transmissive display device 12. In order to maintain the transparency of the transmissive display device 12, the total area of the Micro LED die 14 is slightly smaller than one-tenth of the thin light-transmitting substrate 13, allowing light to penetrate through the space between pixels. The cover light-transmitting plate 16 is disposed in the main light emitting direction of the Micro LED die 14 to penetrate the light beam emitted by the Micro LED die 14 and protect the Micro LED die 14 from external forces or moisture. A light-transmissive bonding layer 15 is sealed between the thin light-transmitting substrate 13 and the cover light-transmitting plate 16. The light-transmitting bonding layer 15 is formed by curing a light-transmissive adhesive base material and distributed on the micro LED chips 14. In the interval, the thin light-transmitting substrate 13 and the cover light-transmitting plate 16 can be firmly combined.

Because the visible light transmittance of the thin light-transmitting substrate 13, the light-transmitting bonding layer 15 and the cover light-transmitting plate 16 is high, and the Micro LED die 14 are at a certain distance from each other, light sufficient to maintain transparency can be transmitted. When the user 20 drives the vehicle, because the visible light transmittance of the transmissive display device 12 is high, the external light on the other side of the windshield 11 opposite to the user 20 can penetrate the windshield 11 and penetrate The display device 12 allows the user 20 to see the road conditions outside the vehicle at the same time and the image displayed by the penetrating display device 12, which solves the problem of looking down at the dashboard during driving and improves driving comfort.

Second preferred embodiment (penetrating display device)

FIG. 3 shows a second preferred embodiment of the penetrating display device of the present invention. The same parts as the previous embodiment are not described in this example, and only the differences are explained. In this embodiment, the transmissive display device 32 has no curvature, and is disposed inside the glass window 31 of the glass curtain building as an advertising wall that emits light to the outside; the transmissive display device 32 includes a thin light-transmitting substrate 33 , A plurality of Micro LED die 34, the light-transmissive bonding layer 35 and the cover light-transmitting plate 36, and the cover light-transmitting plate 36 is arranged in the direction close to the glass window 31, so that the light beam emitted by the Micro LED die 34 can be directed toward The outside of the building is illuminated so that the user 30 passing by the outside of the building can see the screen of the penetrating display device 32. On the other hand, due to the high visible light transmittance of the transmissive display device 32, the light outside the building can also illuminate the interior of the building at the same time, so that the working environment in the building maintains a certain amount of skylight illumination.

The transmissive display device 32 can be further provided with an adjustable light-shielding plate 37 on the side away from the cover light-transmitting plate 36. In this embodiment, the adjustable light-shielding plate 37 is a liquid crystal panel having a plurality of liquid crystal molecules, and the liquid crystal molecules can be controlled by the controller 38 Control to change the arrangement of liquid crystal molecules, thereby blocking the excessive sunlight from the outside from entering the building, or changing the intensity of the light entering the building. Of course, as can be easily understood by those skilled in the art, the adjustable shading plate can also be changed to a shutter with movable windows to control the degree of light entering the building. In addition, when the staff on the first floor of the building does not want the internal working conditions to be seen by users passing by, they can also choose to adjust the adjustable light shield 37 at the rear to the opaque mode to meet their needs.

First preferred embodiment (augmented reality display)

The transmissive display device in the above embodiment is more applicable to an augmented reality display, as shown in the first preferred embodiment of an augmented reality display with a transmissive display device in FIGS. 4 to 6, wherein FIG. 4 is The architecture diagram, FIG. 5 is a schematic diagram of the external structure of the augmented reality display 40 and FIG. 6 is a cross-sectional view of the augmented reality display 40. The augmented reality display 40 includes a wearable body 41, an augmented reality processing device 42 and a penetrating display device 43. The wearable body 41 is for wearing on the head of the user 50 so that the eyes of the user 50 can see the penetrating type at the same time The display screen of the display device 43 and the actual image outside the augmented reality display 40.

The transmissive display device 43 has the same structure as the previous embodiment, including a thin light-transmitting substrate 44, a plurality of Micro LED dies 45, a light-transmitting bonding layer 46, a cover light-transmitting plate 47, and an optical lens group 48. In the embodiment, an augmented reality processing device 42 is provided on the wearable body 41, and is connected to the transmissive display device 43, so that the augmented reality processing device 42 can transmit the image signal to the thin light-transmitting substrate 44 to make the Micro LED die 45 The image screen is displayed. In this embodiment, the thin light-transmitting substrate 44 is made of a relatively strong and wear-resistant material, and is disposed near the outer side of the wearing body 41. The light of the actual external image will be irradiated from the thin light-transmitting substrate 44 into the wearing body 41. Since the light emitted by the transmissive display device 43 is deflected by the optical lens group 48, the optical lens group 48 changes the direction of the light beam emitted by the Micro LED die 45, so that the light source of the transmissive display device 43 emits light A virtual image is formed on the side of the eyes away from the user 50 to avoid the problem that the penetrating display device is too close to the user's eyes to provide a sufficient distance for the image to be formed on the user's fundus. Therefore, after wearing the mask, the user can mix the virtual image with the physical world on his own, and provide stereoscopic images of games such as treasure capture. Of course, as those skilled in the art can easily understand, the so-called optical lens unit here is only a general term for a device that deflects light, and does not limit the form of the lens, especially if it is located between the Micro LED die 45 and the user. Of the optical lens group will cause distortion of the real-world image in the rear, and another set of compensation optical lenses may be provided behind the Micro LED die to eliminate the distortion caused by the real-world image transmitted from the rear through the optical lens group .

Second preferred embodiment (augmented reality display)

As shown in FIG. 7, the augmented reality display can be provided with an adjustable shading plate 49 on the side of the thin transparent substrate 44 opposite to the main light emitting direction of the Micro LED die 45. In this embodiment, the adjustable shading plate 49 has The liquid crystal panel of a plurality of liquid crystal molecules, the augmented reality processing device 42 can synchronously change the arrangement of the liquid crystal molecules, so that the light transmittance of the liquid crystal molecules can be changed. When the light outside the augmented reality display is completely blocked by the adjustable shading plate 49, The user 50 can only see the image of the penetrating display device 43, so that the augmented reality display can also have a virtual reality effect, allowing the user to directly enter the world of movies or games. Of course, even in the aforementioned first embodiment, an adjustable shading plate such as a liquid crystal material can be added to intelligently control and adjust, thereby causing a reduction in overall or partial regional light transmittance and avoiding backlighting of the outside environment Or reflected light, so that driving safety can be further improved.

In summary, the transmissive display device of the present invention uses a thin translucent substrate with high transparency, a cover translucent plate, and a translucent bonding layer, together with pixels spaced apart from each other, to make the transmissive display device It can have a high visible light transmittance; and in the same display range, it can have a higher resolution and better color vividness than the general transmissive display, especially without adjusting the brightness of each pixel through the liquid crystal, so that the crystal Directly display the brightness and darkness according to the power level, saving energy use and prolonging the standby or operating time; the augmented reality display with a transmissive display device, and more through the high-resolution transmissive display device, allowing users to experience more The best augmented reality, especially switching from augmented reality to virtual reality depending on the situation, can adapt to different needs and can provide flexibility.

Claims

A penetrating display device, characterized by including:

A thin light-transmitting substrate with metal circuit layout, the thickness is less than 1.0mm;

A plurality of Micro LED dies are spaced apart from each other on the thin transparent substrate, and the total area of the Micro LED dies is less than one tenth of the area of the thin transparent substrate. The main emission wavelengths of the Micro LED dies are red , Blue and green, and each has a main light direction;

A cover light-transmitting plate for the light beam of the Micro LED chip to penetrate toward the main light emitting direction;

A light-transmissive bonding layer is made of a light-transmissive adhesive substrate. The light-transmissive bonding layer is sealed between the thin light-transmitting substrate and the cover light-transmitting plate.
The transmissive display device according to claim 1, further comprising an adjustable light-shielding plate disposed on a side of the thin light-transmitting substrate away from the cover light-transmitting plate.
The transmissive display device according to claim 2, wherein the adjustable shading plate is a liquid crystal panel having a plurality of liquid crystal molecules, thereby blocking at least part of external light from penetrating.
The transmissive display device as claimed in claim 2, wherein the adjustable shading plate is a blind having a plurality of movable windows to block at least part of external light from penetrating.
The transmissive display device according to claim 1, wherein the size of the Micro LED die is less than 100 microns.
An augmented reality display with a penetrating display device is characterized by including:

A wearable body with a specific curvature;

An augmented reality processing device, which is installed on the wearing body;

A penetrating display device is provided on the wearable body and connected to the augmented reality processing device. The penetrating display device includes:

A thin light-transmitting substrate with a metal circuit layout, the thickness is less than 1.0mm, and has a curvature corresponding to the wearing body;

A plurality of Micro LED dies are spaced apart from each other on the thin transparent substrate, and the total area of the Micro LED dies is less than one tenth of the area of the thin transparent substrate. The main emission wavelengths of the Micro LED dies are red , Blue and green, and each has a main light direction;

A cover light-transmitting plate for the light beam emitted by the Micro LED die toward the main light-emitting direction to penetrate, the cover light-transmitting plate has a curvature corresponding to the thin light-transmitting substrate;

A light-transmissive bonding layer is made of a light-transmissive adhesive substrate. The light-transmissive bonding layer is sealed between the thin light-transmitting substrate and the cover light-transmitting plate.
The augmented reality display with a transmissive display device according to claim 6, further comprising an optical lens set disposed on at least one side of the transmissive display device for changing the micro-LED die The main light emitting direction of the above light beam.
The augmented reality display with a transmissive display device according to claim 6, further comprising an adjustable shading plate disposed on the thin light-transmitting substrate opposite to the main light emitting direction of the Micro LED die Side.
The augmented reality display with a transmissive display device as claimed in claim 8, wherein the adjustable shading plate is a liquid crystal panel, including a plurality of which are controlled by the augmented reality processing device to simultaneously change its light transmittance Of liquid crystal molecules, thereby blocking at least part of the external light from penetrating.