CN108132534B - Near-to-eye display system based on goggles form - Google Patents

Abstract

The invention discloses a near-eye display system based on goggles, belonging to the field of optical equipment for display. The near-eye display system mainly includes a main body of goggles and a battery module provided on the main body of the goggles, an optical module with a switchable position, a quickly detachable night vision module and a wireless data transmission module. The advantages of the present invention: the field of view of the near-eye display system is large, about 35°. The goggles can be connected to the night vision device, and the goggles can display the TV image of the night vision device; the TV image of the gun sight can be wirelessly received and displayed; the TV image of the night vision device and the gun sight can be switched and displayed; no wearer is required Have the relevant mechanical mechanism assembly knowledge reserve. The near-eye display can be stored in the non-use state to avoid blocking the wearer's sight and do not affect the normal use of other peripherals in the device. reliability.

Description

A near-eye display system based on goggles

technical field

The invention belongs to the field of optical equipment for display, in particular to a near-eye display system in the form of goggles.

technical background

Near-eye display systems, also known as helmet-mounted displays, were originally mainly used in military and scientific research fields. The near-eye display system can display external video images to improve the portability and comfort of equipment.

At present, in the field of individual soldier equipment, the near-eye display system is mostly equipped by hand-held or structurally integrated into the helmet. It is large in size and heavy in weight, and cannot be used with some individual soldier equipment, such as the US ANVIS-9 night vision device. It is worn on the helmet through structural integration. The power supply system is an external power supply, which is worn on the side of the soldier's waist. The night vision device is powered by connecting the power cable. When using the ANVIS-9 night vision device, the night vision device needs to be turned over and adjusted. Its position is until the human eye can view the complete picture in the night vision device. Due to its large size, it can only be directly observed through the night vision system, so it cannot be used with goggles at the same time, and its power cord will have a serious impact on the soldier's tactical movements. .

Therefore, applying the display system to the existing equipment and providing portable equipment integrating protection, detection and attack for individual combat has become the development direction of future weapons and equipment.

SUMMARY OF THE INVENTION

The present invention provides a near-eye display system based on the form of goggles, aiming at the deficiencies of the prior art.

In order to achieve the above purpose, the invention provides the following inventive solution: a near-eye display system based on goggles, which mainly includes a goggles body, a battery module provided on the goggles body, a switchable position optical module, and a quick detachable assembly. Night vision module and wireless data transmission module.

The battery module is an anti-insertion and reverse battery module, and it supplies power to the switchable position optical module, the quickly detachable night vision module, and the wireless data transmission module through the basic circuit; the quickly detachable night vision module provides power. The module, in the night vision display mode, transmits the TV picture of the night vision device to the switchable position optical module through the connector for near-eye display; the wireless data transmission module in the gun sight mode, the gun sight TV picture wirelessly transmit to the switchable position optical module for near-eye display;

The battery module includes a battery input, a bridge, and a voltage output. The battery input part is mainly powered by the battery. The bridge part uses the switching characteristics of the MOS tube to control the on-off of the circuit. Because the internal resistance of the MOS tube is very small, the extra power consumption generated by the use of the MOS tube can be ignored. The voltage output part is the output voltage after bridge correction.

The battery module provides a positive/negative input end of the first battery, a positive/negative input end of the second battery, and a positive voltage output end and a negative voltage output end; the circuit includes two resistors and four MOS tubes; the first battery The positive/negative input terminals are connected in series with the first resistor and then connected to the positive voltage output terminal, the positive voltage output terminal is connected in series to the source of the second Mos tube, the grid of the second Mos tube is connected in parallel with the grid of the fourth Mos tube, and the It is connected in series to the positive/negative input terminal of the first battery; the drain of the second Mos tube is connected in parallel with the drain of the fourth Mos tube, and is connected in series to the positive/negative input terminal of the second battery; the source of the first Mos tube is connected in parallel with the first resistor connect. The positive/negative input terminals of the second battery are connected in series with the second resistor and then connected to the negative voltage output terminal. The negative voltage output terminal is connected in series to the source of the fourth Mos tube, and the grid of the first Mos tube is connected in parallel with the grid of the third mos tube. pole, and connected in series to the positive/negative input terminal of the second battery; the drain of the first Mos tube is connected in parallel with the drain of the third mos tube, and is connected in series to the positive/negative input terminal of the first battery; the source of the third Mos tube and the Two resistors are connected in parallel to the negative voltage output terminal.

The switchable position optical module includes a near-eye display adjustable bracket and a near-eye display;

The near-eye display adjustable bracket is an open-chain link mechanism, including a connecting rod and a damping shaft, and the open-chain link includes: a first-level link fixed in the goggle body, and a final-level link connected to the near-eye display, and an intermediate link mechanism connecting the first-level link and the last-level link, the intermediate link mechanism is the main transmission mechanism for adjusting the near-eye display, and the damping shaft is the rotation pair in the open-chain link mechanism, which serves as the adjacent link mechanism. The axis of rotation of the connecting rod.

Preferably, an anti-rotation structure is designed for the connecting rod and the damping shaft.

Preferably, the damping shaft includes a shaft center, a friction sheet, an elastic sheet, a limit sheet and a nut, the friction sheet and the elastic sheet are connected to two adjacent connecting rods through the shaft center and the nut, and the limit sheet is limited Adjust the range of the adjustable angle of the bracket.

The near-eye display mainly includes an optical module, an OLED microdisplay, and a casing.

The optical module includes a relay compensation lens group and a prism component; the relay compensation lens group includes a lens 1, a lens 2 and a doublet lens 3 arranged in sequence; the prism component is cemented by the lens 5, the prism 6 and the lens 7 made;

The function of the lens 1 and the lens 2 is to eliminate the monochromatic aberration of the light source; the function of the double cemented lens 3 is to eliminate the chromatic aberration; the prism component is composed of the lens 5, the prism 6 and the lens 7, which are glued together. Rotate the image 90°;

The first lens is a double concave lens, and the OLED microdisplay and the second lens are placed on both sides of the first lens, wherein the OLED microdisplay is located on the focal plane of the first lens; the second lens is a convex-concave lens, and the first lens and the third doublet are respectively Placed on both sides of the second lens; the double cemented lens 3 is formed by cementing the third lens and the fourth lens, the third lens is a plano-convex lens, the fourth lens is a plano-concave mirror, and the second lens and the prism part are respectively placed in the double cemented lens 32 The prism component is formed by gluing the fifth light-emitting surface of the lens and the six light-entering surfaces of the prism, and the six light-emitting surfaces of the prism and the seventh light-entering surface of the lens. Lens 5 and lens 7 are both plano-convex lenses; the prism 6 is a right-angled trapezoidal prism, and the bottom surface of the right-angled trapezoidal prism and the adjacent right-angled side surfaces respectively constitute the light incident surface and the light output surface of The side surface and the bottom side surface form an included angle of 45°.

In order to meet the imaging design requirements, the relative positional relationship between the OLED microdisplay and the lens should meet:

d _O4 = f' ₄

Wherein d _O4 is the distance between the OLED microdisplay and the lens, and _f'4 is the focal length of the lens.

The optical path of the above-mentioned optical module is as follows: the OLED microdisplay provides an image source, the image source passes through the optical system, the divergent light emitted from the image source passes through lens 1 and then converges and exits through lens 2 in a near-collimated manner, and the converged beam passes through a doublet lens. Third, it reaches the prism component in a divergent state, and the prism component properly collimates the divergent beam to ensure that the emitted beam is totally reflected on the hypotenuse surface of the prism component, thereby improving the utilization rate of light. Moreover, the light emitted from the prism component is a collimated light beam, which ensures that the user's eyes are not fatigued during long-term viewing and use.

The relay compensation group composed of the first lens, the second lens and the double cemented lens in the present invention can correct and compensate various aberrations of the balanced optical system: chromatic aberration, field curvature, dispersion, distortion, etc., so that the system has a good imaging quality. Quality; using a cemented lens, it can deflect the light path by 90°. There is a cemented positive lens at each end of the prism, which can converge the light path, so that the system has a larger field of view and an exit pupil, and can reduce the size of the relay compensation lens group. The OLED microdisplay and optical module can be used to make a prism near-eye display optical system with a large field of view, which is light in weight, small in size, and safe and convenient to use.

The quickly detachable night vision device module is mainly composed of night vision devices. The structure of the quickly detachable night vision module is a buckle mechanism with electrical connection, including a buckle position and a card slot, the buckle position includes a lock block and a switch, and is located at the end of the night vision device tail cover, so The card slot is located above the main frame of the goggles, and the electrical connection is a kind of connector, which transmits the video signal of the night vision device to the near-eye display in the goggles, which is used as the eyepiece of the night vision device.

Preferably, the buckle mechanism is a three-sided buckle structure made of aluminum alloy material, which enhances the wear resistance of the buckle mechanism and the reliability of the connection between the night vision device and the goggles.

Preferably, the lock block is designed with a locking structure at the locking position corresponding to the tail cover of the night vision device, that is, a semicircular boss is designed on the inner side of the lock block, and a semicircular boss is designed at the corresponding position in the tail cover of the night vision device. The circular groove is used for reliable fixation when the night vision device is locked.

The wireless data transmission module receives the video signal transmitted by the gun sight, and transmits it to the switchable position optical module for display.

The near-eye display system in the form of goggles has two working modes, night vision display mode and gun sight display mode. The night vision display mode means that the optical module displays the night vision screen at the switchable position;

The gunsight mode, that is, the goggles are connected to the gunsight system, and after switching to the gunsight display mode by using the button, the gunsight TV picture is displayed in the switchable position optical module through the wireless data transmission module transmission.

Advantages of the present invention:

1) The near-eye display system has a large field of view, about 35°.

2) The goggles can be connected to the night vision device, and the goggles can display the TV image of the night vision device;

3) The TV image of the gun sight can be received wirelessly and displayed;

4) The TV images of night vision goggles and gun sights can be switched and displayed;

5) It is not necessary for the wearer to have a knowledge reserve of relevant mechanical mechanism assembly.

6) The near-eye display can be stored in the non-use state to avoid blocking the wearer's sight and do not affect the normal use of other peripherals in the device. The damping threshold can be adjusted, and under the condition of long-term frequent use, it can ensure a relatively high performance. High reliability.

Description of drawings

Figure 1 overall structure block diagram

Figure 2 Front view

Figure 3 Rear view

Figure 4 Schematic diagram of the principle

Figure 5 Adjustable bracket

Figure 6 Schematic diagram of damping structure

Figure 7 Physical map

Figure 8 Optical Module

Figure 9 Schematic diagram of the combination of relay compensation lenses

Figure 10 Doublet lens

Figure 11 Prism part

Figure 12 Exploded view of quick disassembly structure

Figure 13 Buckle structure diagram

Figure 14 Structure diagram of the tail cover of the night vision device

Figure 15 Switch open state diagram

Figure 16 Switch locking state diagram

In the figure, 1-goggle body, 2-battery module, 3-switchable position optical module, 4-quickly detachable night vision module, 5-wireless data transmission module, 6-first battery positive/negative input terminal , 7- the second battery positive/negative input terminal, 8- voltage positive output terminal, 9- voltage negative output terminal, 10- the first resistor, 11- the second resistor, 12- the second Mos tube 12, 13- the fourth Mos tube, 14-first Mos tube, 15-third Mos tube, 16-first-stage connecting rod, 17-first damping shaft, 18-intermediate connecting rod, 19-second damping shaft, 20-final connecting rod , 21- the first axis, 22- the first friction plate, 23- the second friction plate, 24- the third friction plate, 25- the fourth friction plate, 26- the first elastic plate, 27- the first limit plate, 28- The first nut, 29- The second axis, 30- The fifth friction plate, 31- The sixth friction plate, 32- The seventh friction plate, 33- The eighth friction plate, 34- The second spring plate, 35- The second screw cap, 36-optical module, 37-OLED microdisplay, 38-housing, 39-lens one, 40-lens two, 41 cemented lens three, 42-lens three, 43-lens four, 44-lens five, 45- Prism 6, 46- Lens 7, 47- Buckle 4, 48- Card Slot, 49- Connector, 50- Lock Block, 51- Switch, 52- Night Vision Tail Cover, 53- Male Head, 54- Female head, 55-semi-circular boss, 56-semi-circular groove;

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-16, the purpose of the present invention is to provide a near-eye display system based on goggles, including goggles main body 1, a battery module 2 and a switchable position optical module 3 provided on the goggles main body 1 , The night vision module 4 and the wireless data transmission module 5 can be quickly disassembled.

The main body 1 of the goggles, which adopts the LSR injection molding process, is mainly used as a wearing part and provides structural support for other modules.

The battery module 2 is an anti-insertion and reverse battery module, which supplies power to the switchable position optical module 3, the quick-removable night vision module 4, and the wireless data transmission module 5 through the basic circuit; The vision device module 4, in the night vision device display mode, transmits the TV picture of the night vision device to the switchable position optical module 3 for near-eye display through the connector; the wireless data transmission module 5 is in the gun aiming mode, the The TV picture of the gun sight is wirelessly transmitted to the switchable position optical module 3 for near-eye display;

In this embodiment, a positive/negative input terminal 6 of the first battery, a positive/negative input terminal 7 of the second battery, a positive voltage output terminal 8 and a negative voltage output terminal 9 are provided; the circuit includes two resistors and four MOS transistors The positive/negative input terminal 6 of the first battery is connected in series with the first resistor 10 and then connected to the positive voltage output terminal 8, and the positive voltage output terminal 8 is connected in series to the source of the second Mos tube 12, and the grid of the second Mos tube 12 The gate of the fourth Mos tube 13 is connected in parallel, and connected in series to the positive/negative input terminal 6 of the first battery; the drain of the second Mos tube 12 is connected in parallel with the drain of the fourth Mos tube 13, and is connected in series to the positive/negative of the second battery Input terminal 7; the source of the first Mos tube 14 is connected in parallel with the first resistor 10. The positive/negative input terminal 7 of the second battery is connected in series with the second resistor 11 and then connected to the negative voltage output terminal 9. The negative voltage output terminal 9 is connected in series to the source of the fourth Mos transistor 13, and the gate of the first Mos transistor 14 is connected in parallel The gate of the third mos tube 15 is connected in series to the positive/negative input terminal 7 of the second battery; the drain of the first mos tube 14 is connected in parallel with the drain of the third mos tube 15, and is connected in series to the positive/negative input of the first battery Terminal 6; the source of the third Mos tube 15 is connected in parallel with the second resistor 11 to the negative voltage output terminal 9.

In this embodiment, after the battery is installed, the first situation is that the positive electrode of the battery is in contact with the positive/negative electrode 7 of the first battery, and the negative electrode is in contact with the positive/negative electrode 8 of the second battery. After power-on, the first Mos tube 14 and the fourth Mos tube 13 are turned on, the second Mos tube 12 and the third Mos tube 15 are turned off, the voltage positive output terminal 8 outputs a positive voltage, and the voltage negative output terminal 9 is grounded; the second case is : The negative electrode of the battery is in contact with the positive/negative electrode 7 of the first battery, and the positive electrode is in contact with the positive/negative electrode 8 of the second battery. After power-on, the second MOS transistor 12 and the third MOS transistor 15 are turned on, the first MOS transistor 14 and the fourth MOS transistor 13 are off, the voltage positive output terminal 8 outputs a positive voltage, and the voltage negative output terminal 9 is grounded.

The switchable position optical module 3 includes a near-eye display adjustable bracket and a near-eye display.

The near-eye display adjustable bracket is a three-link open-chain mechanism, including a first-stage connecting rod 16, an intermediate connecting rod 18, a final-stage connecting rod 20, and a first damping shaft 17 and a second damping shaft 19. The One end of the first-stage connecting rod 16 is fixed in the goggle body 1 , the other end is connected to the intermediate connecting rod 18 through the first damping shaft 17 , and the other end of the intermediate connecting rod 18 is connected to the final connecting rod 20 through the second damping rotating shaft 19 , The last-stage link 20 is also the fixing seat of the near-eye display. The damping shaft adopted in the present invention is simple in structure, small in volume and high in reliability, and can provide a stable angle adjustment range for the main body of the goggles.

In this embodiment, the first damping shaft 17 includes a first axis 21 , a first friction plate 22 , a second friction plate 23 , a third friction plate 24 , a fourth friction plate 25 , a first elastic plate 26 , and a first limiter Plate 27 and first nut 28; the first axis 21 is sequentially equipped with a first friction plate 22, a second friction plate 23, a first-stage connecting rod 16, a first limiting plate 27, and one end of the intermediate connecting rod 18 The through hole, the third friction plate 24, the fourth friction plate 25, and the first elastic plate 26 are locked by the first nut 28; the first nut 28 is locked at the end of the first axis 21, so that There is no relative rotation between the first friction plate 22, the second friction plate 23, the third friction plate 24, the fourth friction plate 25, the first elastic plate 26 and the first axis 21, forming a rigid connection; The first limiting piece 27 and the through hole at one end of the intermediate link 18 are in close fit with the first axis 21, so that between the first limiting piece 27 and the first axis 21, the intermediate link 18 and the first axis There is no relative rotation between the cores 21; the first-stage connecting rod 16 and the first axis 21 can rotate relative to each other;

The first limiting piece 27 is an annular body with a fan-shaped notch on the outer circumference. The range of rotation is limited by the range of the sector gap;

The form and number of groups of the friction plates can be selected and adjusted according to actual needs; the form of the first limit plate 27 can be adjusted according to the actual situation to the convex block on the first limit plate 27 and the concave on the first-stage connecting rod 16. The form of slot fit;

In this embodiment, the second damping shaft 19 includes a second axis 29 , a fifth friction plate 30 , a sixth friction plate 31 , a seventh friction plate 32 , an eighth friction plate 33 , a second elastic plate 34 , and a second limiter Plate 20 and second nut 35; the second axis 29 is sequentially equipped with the fifth friction plate 30, the sixth friction plate 31, the through hole at the other end of the intermediate link 18, the second limit plate 20, the end The stage connecting rod 20, the seventh friction plate 32, the eighth friction plate 33, the second elastic plate 34, the ends thereof are locked by the second nut 35; the second nut 35 is locked at the end of the second axis 29,

The fifth friction plate 30, the sixth friction plate 31, the seventh friction plate 32, the eighth friction plate 33, the second elastic plate 34 and the second axis 29 do not rotate relative to each other, forming a rigid connection; The second limiting piece 20 and the through hole at the other end of the intermediate link 18 are in close fit with the second axis 29, so that the through hole at the other end of the second limiting piece 20 and the intermediate link 18 is in close contact with the second axis. There is no relative rotation between 29; relative rotation between the last-stage connecting rod 20 and the second axis 29 is possible;

The second limiting piece 20 is an annular body with a fan-shaped notch on the outer circumference. Limited by the range of the fan-shaped notch;

The form and number of groups of the friction plates can be selected and adjusted according to actual needs; the form of the second limit plate 20 can be adjusted according to the actual situation as the bump on the second limit plate 20 and the groove on the intermediate link 18 the form of cooperation;

In this example, the head-mounted equipment has a small space, and the near-eye display can only move in a plane perpendicular to the wearer's human eye line of sight, and the bracket requires a certain degree of controllability, so a plane three-link structure is selected.

In this embodiment, it is ensured that the near-eye display is always in a state perpendicular to the human eye during the process of pulling the last-stage connecting rod 20 .

In this example, tighten the nut, and adjust the damping size by squeezing the friction plates on both sides of the connecting rod. The friction plates compensate the pressure for the gap generated by long-term rotation, so as to ensure that the rotating shaft will not be loosened frequently.

The near-eye display mainly includes an optical module 36 , an OLED microdisplay 37 , and a housing 38 .

The optical module 36 is provided with a relay compensation lens group and a prism component 43 . The relay compensation lens group is provided with a first lens 39 , a second lens 40 , and a third cemented lens 41 . The third cemented lens 41 is provided with a third lens 42 and a fourth lens 43 , and the prism component 43 is formed by cementing a fifth lens 44 , a sixth prism 45 and a seventh lens 46 .

The function of the lens one 39 and the lens two 40 is to eliminate the monochromatic aberration of the light source; the function of the doublet lens 341 is to eliminate the chromatic aberration; , its function is to rotate the image to 90°;

The first lens 39 is a double concave lens, the OLED microdisplay 37 and the second lens 40 are placed on both sides of the first lens 39, wherein the OLED microdisplay 37 is located on the focal plane of the first lens 39; the second lens 40 is a convex-concave lens, and the lens The first 39 and the third doublet lens 41 are respectively placed on both sides of the second lens 40; the third doublet lens 41 is formed by cementing the third lens 42 and the fourth lens 43, the third lens 42 is a plano-convex lens, and the fourth lens 43 is a plano-concave lens The mirror, the second lens 40 and the prism part 43 are respectively placed on both sides of the doublet lens 41; Glossy glued. Lens five 44 and lens seven 46 are both plano-convex lenses; the prism six 45 is a right-angle trapezoidal prism, and the bottom surface of the right-angle trapezoid prism and the adjacent right-angle edge surface respectively constitute the light incident surface and the light exit surface of the prism six 45, The hypotenuse surface and the bottom edge surface of the prism six 45 form an included angle of 45°.

In order to meet the imaging design requirements, the relative positional relationship between the OLED microdisplay 37 and the lens one 39 should satisfy:

d _O4 =f' ₄ =5.65mm

Wherein d _O4 is the distance between the OLED microdisplay and the lens-39, and _f'4 is the focal length of the lens-39.

The optical path of the above-mentioned optical module is as follows: the OLED microdisplay 37 provides an image source, the image source passes through the optical system, and the divergent light emitted by the image source passes through the lens one 39 and then converges and exits through the lens two 40 in a near-collimated manner. The doublet lens 341 reaches the prism part 43 in a divergent state, and the prism part 43 properly collimates the divergent light beam to ensure that the emitted light beam is totally reflected on the hypotenuse surface of the prism part 43, thereby improving the utilization rate of light. In addition, the light emitted from the prism component 43 is a collimated light beam, which ensures that the user's eyes are not fatigued during long-term viewing and use.

In the present invention, the relay compensation group composed of the first lens 39, the second lens 40, and the third doublet lens 41 can correct and compensate various aberrations of the balanced optical system: chromatic aberration, field curvature, dispersion, distortion, etc., so that the system is related Good imaging quality; using a cemented lens 7, it can bend the light path by 90°. There is a cemented positive lens at each end of the prism, which can converge the light path, so that the system has a larger field of view and an exit pupil, and can reduce the size of the relay compensation lens group. The OLED microdisplay 37 and the optical module 36 can be used to make a prism near-eye display optical system with a large field of view, light in weight, small in size, and safe and convenient to use.

The night vision device module 5 can be quickly disassembled, mainly composed of night vision devices, and provides a switchable night vision device mode. The night vision device module 5 is fixed on the goggle main body 1 using a removable clip.

The structure of the quickly dismountable night vision device is a buckle mechanism with an electrical connection in the middle. The buckle mechanism includes a buckle position 47 , a card slot 48 , and a connector 49 , and the buckle position 47 includes a lock block 50 . The switch 51 is located in the tail cover 52 of the night vision device, which is a three-sided buckle structure, that is, the two opposite sides are respectively composed of two rectangular bosses, the gap between the two rectangular bosses is greater than the length of the rectangular boss, and the other side is composed of two rectangular bosses. It is composed of an elongated boss, and its shape is consistent with the shape of the night vision device tail cover. The card slot 48 is located above the goggles main frame 7 and corresponds to the buckle position 47. The two opposite sides are respectively composed of two rectangular slots, and the gaps between the slots on the three sides and the upper surface of the goggle body frame 7 are slightly larger than the thickness of the boss in the buckle 47. The connector 49 includes the male head 53 and The female head 54, the male head 53 is located in the night vision device tail cover 52, the female head 54 is located in the frame of the goggle body 1, the night vision device tail cover 52 is designed with a lock at the locking position of the lock block 50 A tight structure, that is, a semicircular boss 55 is designed on the inner side of the lock block 50, and a semicircular groove 56 is designed at the corresponding position in the night vision device tail cover 52, so that the night vision device is locked by extrusion stress.

In this embodiment, before installing the night vision device, move the switch 51 towards the objective lens, insert the night vision device, and move the switch 51 towards the eyepiece to complete the assembly process of the night vision device; when disassembling, move the switch 51 to On the other side, unplug the night vision device to complete the disassembly process of the night vision device.

The images of the night vision device module 4 and the wireless data transmission module 5 can be quickly disassembled and displayed.

Claims (8)

1. A near-to-eye display system based on a goggle form mainly comprises a goggle main body, and a battery module, a switchable position optical module, a quickly detachable night vision device module and a wireless data transmission module which are arranged on the goggle main body; the battery module is an anti-reverse battery module and supplies power to the optical module with the switchable position, the night vision device module capable of being rapidly assembled and disassembled and the wireless data transmission module through a basic circuit; the switchable position optical module comprises a near-eye display adjustable bracket and a near-eye display; the quickly detachable night vision device module transmits a television picture of the night vision device to the switchable position optical module through the connector for near-to-eye display in a display mode of the night vision device; the wireless data transmission module wirelessly transmits the television picture of the gun sight to the optical module capable of switching the position for near-to-eye display in a gun sight mode; it is characterized in that the preparation method is characterized in that,

the battery module comprises a battery input, a bridge and a voltage output; the battery input part is mainly powered by a battery; the bridge part utilizes the switching characteristic of the MOS tube to control the on-off of the circuit, and because the internal resistance of the MOS tube is very small, the extra power consumption generated by the MOS tube can be ignored; the voltage output part is the output voltage after the bridge correction;

the battery module provides a first battery positive/negative input end, a second battery positive/negative input end, a voltage positive output end and a voltage negative output end; the circuit comprises two resistors and four MOS tubes; one path of positive/negative input of the first battery is connected with a first resistor in series and then connected with positive voltage output, the positive voltage output is connected with a source electrode of a second Mos tube in series, and a grid electrode of the second Mos tube is connected with a grid electrode of a fourth Mos tube in parallel and is connected with the positive/negative input of the first battery in series; the drain electrode of the second Mos tube is connected in parallel with the drain electrode of the fourth Mos tube and is connected in series to the positive/negative input of the second battery; the source electrode of the first Mos tube is connected with the first resistor in parallel; one path of positive/negative input of the second battery is connected with a second resistor in series and then connected with negative voltage output, the negative voltage output is connected with a source electrode of a fourth Mos tube in series, and a grid electrode of the first Mos tube is connected with a grid electrode of a third Mos tube in parallel and is connected with positive/negative input of the second battery in series; the drain electrode of the first Mos tube is connected in parallel with the drain electrode of the third Mos tube and is connected in series to the positive/negative input of the first battery; the source electrode of the third Mos tube is connected with the second resistor in parallel and connected with the negative voltage output;

the near-eye display mainly comprises an optical module, an OLED micro-display and a shell;

the optical module comprises a relay compensation lens group and a prism component; the relay compensation lens group comprises a first lens, a second lens and a third double-cemented lens which are sequentially arranged; the prism component is formed by gluing a lens five, a prism six and a lens seven;

the first lens and the second lens are used for eliminating monochromatic aberration of the light source; the third double cemented lens is used for eliminating chromatic aberration; the prism component is formed by gluing a fifth lens, a sixth prism and a seventh lens and is used for rotating the image by 90 degrees;

the first lens is a double-concave lens, the OLED micro display and the second lens are respectively arranged on two sides of the first lens, and the OLED micro display is located on a focal plane of the first lens; the second lens is a convex-concave lens, and the first lens and the third double-cemented lens are respectively arranged on two sides of the second lens; the double-cemented lens III is formed by cementing a lens III and a lens IV, the lens III is a plano-convex lens, the lens IV is a plano-concave lens, and the lens II and the prism component are respectively arranged on two sides of the double-cemented lens III; the prism component is formed by gluing a lens five light-emitting surface and a prism six light-entering surface, and gluing the prism six light-emitting surface and a lens seven light-entering surface; the fifth lens and the seventh lens are both plano-convex lenses; the prism six is a right-angle trapezoidal prism, the bottom side surface of the right-angle trapezoidal prism and the adjacent right-angle side surface respectively form a light inlet surface and a light outlet surface of the prism six, and the inclined side surface and the bottom side surface of the prism six form an included angle of 45 degrees;

in order to meet the imaging design requirements, the relative position relationship between the OLED micro display and the first lens and the relative position relationship between the OLED micro display and the first lens should meet the following requirements:

d_O4＝f₄′

wherein d is_O4Is OLED microdisplay-to-lens spacing, f'₄Is the focal length of the lens.

2. A near-eye display system in the form of goggles as defined by claim 1,

the adjustable support of near-eye display is open chain link mechanism, including connecting rod and damping pivot, the open chain connecting rod includes: the safety goggles comprise a first-stage connecting rod fixed in a goggle main body, a last-stage connecting rod connected with a near-eye display, and a middle connecting rod mechanism connected with the first-stage connecting rod and the last-stage connecting rod, wherein the middle connecting rod mechanism is a main transmission mechanism for adjusting the near-eye display, and a damping rotating shaft is a revolute pair in an open-chain connecting rod mechanism and serves as a rotating shaft of an adjacent connecting rod.

3. A near-to-eye display system in the form of goggles as claimed in claim 2, wherein said link and damping shaft are designed with anti-rotation features.

4. The near-to-eye display system based on the goggle type of claim 2, wherein the damping spindle comprises a shaft, a friction plate, a spring plate, a limiting plate and a nut, the friction plate and the spring plate are connected with two adjacent connecting rods through the shaft and the nut, and the limiting plate is used for limiting the adjustable angle range of the adjustable bracket.

5. A near-eye display system in the form of goggles as defined by claim 1,

the quick detachable night vision device module mainly comprises a night vision device; but quick assembly disassembly night-time vision device module's structure is a buckle mechanism with electrical connection, including detaining position, draw-in groove, detain the position and include locking piece and switch, be located the night-time vision device tail-hood end, the draw-in groove is located goggles main part frame top, electrical connection is a connector, transmits night-time vision device video signal to the near-to-eye display in the goggles as the night-time vision device eyepiece.

6. A goggle-based near-eye display system as recited in claim 5 wherein the snap mechanism is a three-sided snap structure fabricated from an aluminum alloy material.

7. A near-to-eye display system in the form of goggles as claimed in claim 5, characterized in that the locking piece is designed with a locking structure at the locking position in correspondence with the rear cover of the night vision device, i.e. a semicircular projection is designed on the inner side of the locking piece and a semicircular recess is designed in the rear cover of the night vision device at the corresponding position for secure fixation in the locked state of the night vision device.

8. A near-to-eye display system in the form of goggles as claimed in claim 5, wherein said wireless data transmission module receives video signals transmitted from the gun sight and transmits the video signals to the switchable position optical module for display.

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