阅读说明：本技术 一种可叠加显示其他信息的夜视设备 (Night vision device capable of displaying other information in superposition mode ) 是由 吴金华 杨斌 洪乙又 王子薇 李贺 周继德 郑赛 徐增 樊卫华 王绪华 于 2020-05-09 设计创作，主要内容包括：一种可叠加显示其他信息的夜视设备,其特征是在夜视设备内部使用的微光像增强器荧光屏表面贴合有一层透明超薄显示器件,通过外部电路提供驱动信号,显示图像信息。可以在夜视设备观察外部场景的同时,看到由透明超薄显示器件显示的信息。这个信息可以是来自红外摄像头的红外图像,也可以是动态标志、位置坐标、任务指令等其他信息内容。该透明超薄显示器件显示区域面形与微光像增强器荧光屏表面完全一致,且紧紧贴合,处于一个显示焦面,通过夜视设备的目镜可以清晰的观察到叠加的图像信息,而不需要其他形式的光路叠加和耦合。本发明增加了夜视设备的图像叠加显示功能,节省了采用普通的图像叠加光路带来的重量和体积。(A night vision device capable of displaying other information in a superposed manner is characterized in that a layer of transparent ultrathin display device is attached to the surface of a fluorescent screen of a low-light-level image intensifier used in the night vision device, and driving signals are provided through an external circuit to display image information. It is possible to see information displayed by the transparent ultra-thin display device while the night vision device observes an external scene. This information may be an infrared image from an infrared camera, or other information content such as dynamic markers, position coordinates, task instructions, etc. The surface shape of the display area of the transparent ultrathin display device is completely consistent with the surface of the fluorescent screen of the low-light-level image intensifier, the transparent ultrathin display device is tightly attached to the surface of the fluorescent screen of the low-light-level image intensifier and is positioned on a display focal plane, superposed image information can be clearly observed through an ocular lens of night vision equipment, and optical path superposition and coupling in other forms are not needed. The invention increases the image superposition display function of the night vision device and saves the weight and the volume brought by adopting a common image superposition light path.)

1. A night vision device able to display other information by superposition features that a transparent ultrathin display device is attached to the surface of low-light-level image intensifier (image tube) used in the night vision device.

2. Night vision device for superimposed display of further information according to claim 1, characterized in that: the surface shape of the display area of the transparent ultrathin display device is completely consistent with the surface of the image tube fluorescent screen optical fiber panel and is tightly attached.

3. Night vision device for superimposed display of further information according to claim 1, characterized in that: the transparent ultrathin display device can display image information by providing a driving signal through an external circuit.

4. Night vision device for superimposed display of further information according to claim 1, characterized in that: the total thickness of the display luminescent layer thickness of the transparent ultrathin display device and the packaging layer and the joint bonding layer on one side of the surface of the fluorescent screen of the image tube is less than the focal depth of the ocular lens.

5. Night vision device for superimposed display of further information according to claim 1, characterized in that: the display luminescent layer and the packaging layer of the transparent ultrathin display device are transparent, the aperture ratio of a luminescent region is larger than 70%, and the non-luminescent line width or point size of the display region is smaller than 3 micrometers.

6. Night vision device for superimposed display of further information according to claim 1, characterized in that: the display resolution of the transparent ultrathin display device is more than 600 multiplied by 600 for an 18mm image tube.

7. Night vision device for superimposed display of further information according to claim 1, characterized in that: the maximum display brightness of the transparent ultrathin display device and the maximum image brightness of the fluorescent screen fiber panel of the low-light-level image intensifier have deviation not larger than +/-20%.

Technical Field

The invention relates to the field of night vision imaging by adopting a low-light-level image intensifier, in particular to night vision imaging equipment which needs to integrate dynamic mark information and infrared images or superimpose other digital information on a conventional night vision imaging system.

Background

The method adopts a monocular night vision lens, a binocular night vision lens or other types of night vision imaging equipment of a low-light-level image intensifier (image tube for short), can focus weak reflected light generated by irradiating moonlight and starlight at night on a target object on the cathode surface of the image tube through an objective lens, and forms a target image of weak light on the cathode surface of the image tube; the cathode of the image tube and the micro-channel plate convert photons imaged on the cathode surface into electrons, amplify and enhance the electrons and bombard the surface of a fluorescent screen of the image tube; the image with the brightness enhanced by more than thousands of times appears on the surface of the fluorescent screen, the image is transmitted to the outer surface of the fluorescent screen through the optical fiber panel, and the clear target image with the enhanced brightness can be seen by human eyes through an eyepiece of a night vision imaging device. At present, night vision imaging equipment with an image tube as a core device is used in the fields of civil night hunting, security patrol, auxiliary driving, military individual soldier night battle, anti-terrorism, airplane night driving and the like, and is gradually popularized and applied as night auxiliary observation equipment for individual soldier individuals, vehicle drivers, helicopter drivers and fighter plane drivers. The current night vision devices need to be more portable, lightweight and multifunctional on the basis of high resolution and high gain, and particularly need to be able to simultaneously see digital information such as some dynamic marks, target infrared image information, instructions and geographic positions and the like outside a night vision image. The night vision device developed by directly utilizing the traditional image tube can only see the night vision image which is enhanced and amplified by the image tube through an eyepiece of the night vision device, and cannot superpose digital information such as infrared image information, instructions, geographic positions and the like. Some night vision devices have the image superposition function, and the adopted method is to add an additional image display screen and a superposition coupling optical path (such as figures 3, 4 and 5) on the basis of the original objective lens, image tube and eyepiece (such as figure 2), and the defect is that the volume and the weight of the night vision device can be greatly increased by adopting the superposition coupling optical path. The superposition display device capable of simultaneously displaying digital information such as dynamic marks, low-light-level night vision images, infrared image information, instructions, geographic positions and the like is a low-light-level infrared detection system or night vision device developed by combining a novel low-light-level sensor such as a low-light-level CMOS or EMCCD and the like with an infrared detection device.

Disclosure of Invention

The invention aims to design a night vision device capable of displaying other information in a superimposed manner aiming at the problems of large volume and low response speed of the existing superimposed display device. The surface of the fluorescent screen of the low-light-level image intensifier used in the night vision equipment capable of displaying other information in a superposed manner is attached with a layer of transparent ultrathin display device, and a driving signal is provided through an external circuit to display image information. It is possible to see information displayed by the transparent ultra-thin display device simultaneously while the night vision device observes an external scene. This information may be an infrared image from an infrared camera, or other information content such as a logo, position coordinates, task instructions, etc. The surface shape of the display area of the transparent ultrathin display device is completely consistent with the surface of the fluorescent screen of the low-light-level image intensifier, the display area is tightly attached to the surface of the fluorescent screen of the low-light-level image intensifier, the display area and the surface of the fluorescent screen of the low-light-level image intensifier are all in the focal depth range of the ocular lens, and the superposed image information can be clearly observed through the ocular lens of the night vision device without. The invention increases the image superposition function of the night vision device and saves the weight and the volume caused by adding a complex superposition light path.

The technical scheme of the invention is as follows:

a night vision device able to display other information by superposition features that a transparent ultrathin display device is attached to the surface of low-light-level image intensifier (image tube) used in the night vision device.

The surface shape of the display area of the transparent ultrathin display device is completely consistent with the surface of the image tube fluorescent screen optical fiber panel and is tightly attached.

The transparent ultrathin display device can display image information by providing a driving signal through an external circuit.

The total thickness of the display luminescent layer of the transparent ultrathin display device and the joint bonding layer of the packaging layer on one side of the surface of the fluorescent screen of the image tube is less than the focal depth of the ocular lens.

The display luminescent layer and the packaging layer of the transparent ultrathin display device are transparent, the aperture ratio of a luminescent region is larger than 70%, and the non-luminescent line width or point size of the display region is smaller than 3 micrometers.

The display resolution of the transparent ultrathin display device is more than 600 multiplied by 600 for an 18mm image tube.

The maximum display brightness of the transparent ultrathin display device and the maximum image brightness of the fluorescent screen fiber panel of the low-light-level image intensifier have deviation not larger than +/-20%.

The invention has the beneficial effects that:

the invention utilizes the characteristics of ultra-thin, transparent, high resolution, high contrast and certain depth of the focal depth of an eyepiece of common night vision equipment of the transparent ultra-thin display device to attach the transparent ultra-thin display device and a fluorescent screen of a picture tube together, thereby realizing the function that night vision equipment can clearly observe night vision images of the picture tube and other image information displayed by the ultra-thin display device through the eyepiece at the same time. Image information superimposed with an infrared image or other digital signal is seen on the night vision device without the need for other forms of optical path superimposition and coupling. The invention increases the image superposition function of the night vision device and saves the weight and the volume brought by adopting a common image superposition light path.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the optical path of a common monocular night vision goggles using a low-light level image intensifier (referred to as an image tube for short). The image tube 100, the objective lens assembly 200 and the eyepiece lens assembly 300 can make the human eye see the low-light night vision image amplified and enhanced by the image tube through the eyepiece.

Fig. 3 is a schematic diagram of an optical path for superimposing other information displays on a monocular night vision goggles using an image tube, which includes an image tube 100, an objective lens assembly 200, an eyepiece lens assembly 300, an eyepiece outside image superimposing optical path 400, and a micro display 500 for generating an image. The human eyes can see the low-light night vision image amplified and enhanced by the image tube through the ocular lens, and can see other images superposed and fused through the superposition light path. The way of superimposing the light paths outside the eyepiece requires redesigning the eyepiece group of the night vision device.

Fig. 4 is a schematic diagram of an optical path for superimposing other information displays on the basis of a single-tube night vision goggles using an image tube, which includes an image tube 100, an objective lens assembly 200, an eyepiece lens assembly 300, an eyepiece lens inner side image superimposing optical path 400, and a micro display screen 500 for generating an image. Human eyes can see the low-light night vision image through the ocular lens and can see other images which are overlapped and fused through the superposition light path. This way of superimposing the light paths inside the eyepiece also requires redesigning the eyepiece set of the night vision device.

Fig. 5 is a schematic diagram of an optical path for superimposing other information displays on a common monocular night vision goggles using an image tube, which includes an image tube 100, an objective lens assembly 200, an eyepiece lens assembly 300, an objective lens outer image superimposing optical path 400, and a micro display 500 for generating an image. Human eyes can see the low-light night vision image through the ocular lens and can see other images which are superposed and fused through the objective lens. The mode of superposing the light path outside the objective lens of the night vision device does not need to change any light path of the night vision device, and is widely applied at home and abroad. The device has the advantages that the use is convenient, the device (generally an infrared night vision system) can be clamped in front of an objective lens of common night vision equipment at any time, the defect is that the capability of the night vision equipment for observing outside is reduced, and simultaneously, the superposed images are only arranged at the central position of the image tube and cannot be superposed in a full view field.

Fig. 6 is a schematic diagram of an optical path for superimposing other information displays by attaching a transparent ultrathin display device on a monocular night vision goggles using an image tube, wherein the image tube 100, an objective lens assembly 200, an eyepiece lens assembly 300 and the transparent ultrathin display device 600 are arranged on the same plane; since the outer surface of the screen of the picture tube is a concave surface (the radius may be R40), the shape of the transparent ultra-thin display device 600 is also concave-convex and completely overlaps the outer surface of the screen of the picture tube.

FIG. 7 is a schematic view of the optical path of the patent for superimposing other information displays by attaching a transparent ultrathin display device based on a night vision device using an image tube, the image tube 100, an objective lens assembly 200, an eyepiece lens assembly 300, and the transparent ultrathin display device 600; the outer surface of the screen of the image tube is plane, so the shape of the transparent ultrathin display device is also plane and completely coincides with the outer surface of the screen of the image tube.

Detailed Description

The invention is further described below with reference to the figures and examples.

As shown in figures 1, 6 and 7.

A night vision device capable of displaying other information in a superposed manner is characterized in that a layer of transparent ultrathin display device 600 (shown in figures 1, 6 and 7) is attached to the surface 700 (shown in figure 1 by thick black lines) of a fluorescent screen of a low-light-level image intensifier (image tube) used in the night vision device, the size and the surface shape of a display area of the transparent ultrathin display device are completely consistent with those of the surface of an optical fiber panel of the image tube fluorescent screen and are tightly attached to each other, and the transparent ultrathin display device is driven by an external signal source and a driving circuit to display image information. In order to clearly see the display content of the fluorescent screen of the image tube and the image information displayed in an overlapping mode through the ocular lens, the thickness difference between the display luminescent layer of the transparent ultrathin display device and the surface of the fluorescent screen of the image tube is within the focal depth range of the ocular lens, namely the thickness of the display luminescent layer of the ultrathin display device plus the size of the joint adhesive layer of the packaging layer on one side of the surface of the fluorescent screen of the image tube, wherein the total thickness of the joint adhesive layer is smaller than the focal depth of the ocular lens and is 30-40 mu m. According to the prior art, the thickness of the bonding layer is 10-15 μm, the thickness of the display luminescent layer of the ultrathin display device and the thickness of the packaging protective layer are 15-25 μm, and the requirement that the total thickness is smaller than the focal depth of an eyepiece is met. The adhesive layer can be transparent thermosetting optical epoxy glue or other liquid glue films with high light transmission performance and good adhesive strength. The process substrate of the planar transparent ultrathin display device can be made of a glass material, the thickness of the process substrate is 0.1-0.55 mm, and the drive IC can be bound on the glass substrate or a lead-out FPC. The thicker glass substrate is positioned outside the outer surface of the fluorescent screen and has little effect on the optical path of the eyepiece.

In order to not reduce the image display quality of night vision equipment, the display luminescent layer and the packaging layer of the transparent ultrathin display device are designed to be transparent, the aperture ratio of the transparent luminescent area is more than 70%, and the line width or the point size of the non-transparent area is less than 3 μm and less than the optical fiber size (generally about 6 μm) of the screen optical fiber panel of the low-light-level image intensifier.

For an 18mm image tube, the effective display size is 17.5mm, the display resolution of the transparent ultrathin display device is larger than 600 × 600, the video signal of an 800 × 600 infrared focal plane imaging sensor device can be matched and superposed, and the resolution can well meet the use requirement.

In order not to degrade the image display quality of the night vision device, the superimposed information image should generally be a high-contrast line, character, logo or contrast-enhanced infrared image. The field of view of the infrared camera should be consistent with the field of view corresponding to the night vision device or the superimposed infrared video image and the target image 1 formed by the night vision device through digital image processing: 1, overlapping and fusing the visual fields. The optical axis of the infrared image camera or other infrared equipment is parallel to the optical axis of the night vision equipment, and the distance between the optical axes is minimized.

The resolution ratio of the invention which can be obtained by aiming at an 18mm image tube is more than 600 multiplied by 600, which is equivalent to 850 PPI, the technology adopted by the transparent ultrathin display device can be the transparent OLED which is relatively mature at present, and the technology which can meet the R40 concave surface shape (figure 6) can be the flexible transparent OLED. The desired resolution of the present invention is greater than 850 PPI, which is available in current technology by custom-making from a professional manufacturer. Since the picture tube is a monochrome light emitting display, the transparent ultra-thin display device should display with another contrast color different from the light emitting color of the picture tube to meet the user's requirement. The monochrome transparent ultrathin display device is less difficult to manufacture when the resolution is more than 850 PPI.

For a green emitting tube, the transparent ultra-thin display device can be designed to display in a single yellow or orange color. The effective display area size is 18.2mm, corresponding to a pixel resolution of 620 × 620, the size is 29.4 × 29.4 μm, the line width of the opaque region is 3 μm, the aperture ratio can be greater than 70%, and the transmittance is about 50%.

Full color displays provide more information content, but require high resolution and transmittance that meet the requirements of the present invention, and opaque line widths of less than 3 μm.

In order to not reduce the image display quality of night vision equipment, the deviation between the display brightness of the transparent ultrathin display device and the maximum brightness of the image of the fluorescent screen fiber panel of the low-light-level image intensifier is not more than +/-20%, and the brightness can be adjusted to a comfortable degree, usually the brightness is adjusted to be maximum 15cd/m²Minimum of about 2 cd/m²。

The technical scheme of the invention can well solve the problems that the night vision equipment has good dynamic response performance, portability, low weight and multiple functions on the basis of high resolution and high gain, and particularly displays digital information such as dynamic marks, target infrared image information, instructions, geographical positions and the like in a superposition mode. And the structure is simple, the weight is light, the schemes of a system light path lens and the like are basically consistent with those of the traditional night vision equipment, and the system light path lens does not need to be changed greatly. The invention only needs to manufacture the transparent ultrathin display device, and the transparent ultrathin display device is tightly adhered and adhered to the surface of the fluorescent screen of the image tube, and the corresponding adjustment needs to be carried out on the packaging structure at the periphery of the fluorescent screen of the image tube.

For the image tube with the plane surface of the fluorescent screen, the plane transparent ultrathin display device is relatively easy to design and manufacture, the image tube can also be a transparent display device with hard glass as a substrate, and the difference from the common transparent display device is that one side of the display device, which is opposite to a light-emitting medium layer, is very thin, namely the requirements of the device, namely the thickness of a display luminescent layer of the device, the thickness of a packaging layer on one side of the surface of the fluorescent screen of the image tube, and the total thickness of a bonding layer which is attached to the surface of the fluorescent screen of the image tube, is less than the.

For the condition that the outer surface of the fluorescent screen of the image tube is the R40 concave spherical surface, it is difficult to manufacture the transparent ultrathin display device with the corresponding shape, and the transparent ultrathin display device which is formed by hot-pressing the R40 concave spherical surface by using a specific concave-convex mould on the basis of the manufactured planar transparent ultrathin display device is feasible.

The technology that is more likely to be used for the transparent ultra-thin display device of the present invention is the transparent OLED that has been relatively mature at present. What is necessary to satisfy the concave shape of R40 is a flexible transparent OLED. At present, the size of the flexible transparent OLED display screen with the maximum size can reach 77 inches (reported in 6 months in 2017 by LG company), and the resolution of the OLED screen for the Samsung mobile phone can reach 6.1 inches and 3040 x 1440, which is equivalent to 500 PPI. The resolution desired by the present invention is an 18mm image tube corresponding to 600 × 600, which is equivalent to 850 PPI, and should be feasible with current technology. Since the picture tube is a monochromatic light emitting display, the transparent ultrathin display device can meet the requirement of a user by adopting another contrast color (such as yellow or red) display which is different from the light emitting color of the picture tube. The monochrome transparent ultrathin display device is less difficult to manufacture when the resolution is more than 850 PPI. Full color displays can provide more information content, but meet the high resolution and transmittance required by the present invention, and the opaque line width is less than 3 μm.

The present invention is not concerned with parts which are the same as or can be implemented using prior art techniques.