A visual function training device and a ghost image elimination method thereof

Abstract

The application provides a visual function training device and a residual image elimination method thereof. The visual function training device comprises an optical engine module, a lens module, an extinction module and a driving unit. The extinction module comprises a left extinction ring, a right extinction ring and an extinction ring support. The extinction ring support comprises a first light baffle in the left extinction ring and a second light baffle in the right extinction ring. The left extinction ring and the first light baffle form a left light ring with a variable light passing area, and the right extinction ring and the second light baffle form a right light ring with a variable light passing area. The application utilizes the characteristics of the semi-transparent and semi-reflective glass to project two display pictures with mutually perpendicular display interfaces and 90-degree difference in emitted polarized light to the viewer, and the light paths of the two display interfaces to the viewer are equal. While the optical engine module moves forward and backward, the two displays and the left and right extinction rings move left and right synchronously in proportion, so that the viewer can see clear linkage pictures.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vision care, and particularly relates to a visual function training device and a residual image elimination method thereof. BACKGROUND

[0002] With the comprehensive improvement of economic construction and culture, the incidence of eye diseases of different age groups has increased year by year, especially the incidence of myopia in primary and secondary school students is high, which seriously affects the physical quality of people, and long time close eye use is the cause of myopia. At present, there are various products and instruments for relieving eye fatigue and treating eye diseases, among which the mobile 3D display device based on binocular image combination has good health care effect for relieving visual fatigue and treating eye diseases.

[0003] At present, the 3D display implementation mode of large size display based on binocular image combination has a polarized light mode, that is, the viewer wears polarized light sheet glasses, the polarization angles of the left and right lenses of the glasses are different by 90 degrees and are the same as the polarization angles of the polarized light emitted by the display end left and right pictures, so that the left and right eyes can view the left and right pictures to form 3D vision.

[0004] The implementation method of the polarized light type has two kinds, one is to set a row-by-row polarized light sheet on the display screen, the odd rows are vertical light and the even rows are horizontal light, and the left and right eyes can view the left and right pictures to form 3D vision by wearing polarized light glasses, obviously, the row resolution is reduced by half, that is, the high-definition video signal of 1920x1080, the actual display is 1920x540, and the experience effect is poor. The second is the back projection mode, two cameras are provided with polarized light sheets with a difference of 90 degrees in front of the lenses, and two pictures are projected onto the back projection screen, and the viewer watches the double pictures in front of the back projection screen by wearing polarized light glasses, so that the left and right eyes can view the left and right pictures to form 3D vision. The disadvantage of this mode is that the requirement for the back projection screen is relatively high, the back projection screen not only needs to meet the viewing angle, but also needs to have the polarization light transmission characteristics. In addition, the resolution of the micro projector is generally low, and the size of the high-definition projector is relatively large and the cost is high. In summary, it is difficult to meet the viewing angle, have the polarization light transmission characteristics, and realize the multi-dimensional movement of the picture to meet the three-linkage of binocular vision at the same time. For all these reasons, the projection scheme is not ideal.

[0005] Therefore, it is necessary to design a new large size visual function training device which meets the three-linkage of vision and binocular image combination. SUMMARY

[0006] The purpose of the present application is to provide a visual function training device with large size picture which meets the three-linkage of vision and binocular image combination and a residual image elimination method thereof.

[0007] The application provides a visual function training device, which comprises a light machine module and a lens module located in front of the light machine module, the light machine module comprises a shell, a first display module fixed on the upper end of the shell, and a second display module fixed on the rear end of the shell, and the light machine module further comprises a semi-transparent and semi-reflective optical glass located in the shell, the semi-transparent and semi-reflective optical glass is located between the first display module and the second display module and forms an angle of 45° with the horizontal plane.

[0008] The visual function training device further comprises an extinction module located between the light machine module and the lens module, the extinction module comprises a left extinction ring, a right extinction ring and an extinction ring support, the left extinction ring and the right extinction ring are movably fixed on the extinction ring support, the extinction ring support comprises a first light baffle located in the left extinction ring and a second light baffle located in the right extinction ring, wherein the left extinction ring and the first light baffle form a left light ring with a variable light passing area, and the right extinction ring and the second light baffle form a right light ring with a variable light passing area.

[0009] The visual function training device further comprises a driving unit for driving the light machine module to move forward and backward and simultaneously driving the left extinction ring and the right extinction ring to move left and right, and the driving unit is fixedly connected with the light machine module, the left extinction ring and the right extinction ring.

[0010] Further, the left extinction ring and the right extinction ring each comprise a frame, a first buckle groove piece fixed on the upper surface of the frame, and two second perforated fixing pieces fixed on the lower surface of the frame.

[0011] Further, the frame is composed of four opposite sides, the frame is provided with a front opening located at the front end of the four sides and a rear opening located at the rear end of the four sides, the first light baffle extends into the frame of the left extinction ring from the front opening of the left extinction ring, and the second light baffle extends into the frame of the right extinction ring from the front opening of the right extinction ring.

[0012] Further, the extinction ring support further comprises a support body, and a left opening and a right opening located on the support body and corresponding to the left extinction ring and the right extinction ring respectively, the first light baffle extends from one end of the left opening to the direction of the light machine module, and the second light baffle extends from one end of the right opening to the direction of the light machine module.

[0013] Further, the light extinction ring support further comprises an intermediate plate between the first light baffle and the second light baffle, an upper plate and a lower plate connected to both ends of the intermediate plate respectively, two first upper positioning members respectively located at the upper end of the first light baffle and the end of the intermediate plate close to the upper end of the first light baffle, two first lower positioning members respectively located at the lower end of the first light baffle and the end of the intermediate plate close to the lower end of the first light baffle, two second upper positioning members respectively located at the upper end of the second light baffle and the end of the intermediate plate close to the upper end of the second light baffle, and two second lower positioning members respectively located at the lower end of the second light baffle and the end of the intermediate plate close to the lower end of the second light baffle.

[0014] Further, the light extinction module further comprises a first sliding shaft, a second sliding shaft, a third sliding shaft, and a fourth sliding shaft; both ends of the first sliding shaft are respectively fixed in the two first upper positioning members of the light extinction ring support by screws, and the first sliding shaft controls the front and rear cooperation gap of the left light extinction ring in a reasonable range through the first buckle groove member of the left light extinction ring; both ends of the second sliding shaft are respectively fixed in the two first lower positioning members of the light extinction ring support by screws, and the second sliding shaft controls the upper and lower front and rear cooperation gap of the left light extinction ring in a reasonable range through the two second perforated fixing members of the left light extinction ring; both ends of the third sliding shaft are respectively fixed in the two second upper positioning members of the light extinction ring support by screws, and the third sliding shaft controls the front and rear cooperation gap of the right light extinction ring in a reasonable range through the first buckle groove member of the right light extinction ring; both ends of the fourth sliding shaft are respectively fixed in the two second lower positioning members of the light extinction ring support by screws, and the fourth sliding shaft controls the upper and lower front and rear cooperation gap of the right light extinction ring in a reasonable range through the two second perforated fixing members of the right light extinction ring.

[0015] Further, the first display module comprises a first display signal processing plate fixed at the upper end of the shell, a first display located below the first display signal processing plate, a first display combination support for fixing the first display signal processing plate and the first display, and a second driving unit connected between the first display signal processing plate and the first display; the second display module comprises a second display signal processing plate fixed at the rear end of the shell, a second display located in front of the second display signal processing plate, a second display combination support for fixing the second display signal processing plate and the second display, and a third driving unit connected between the second display signal processing plate and the second display.

[0016] Further, the lens module comprises a lens module support, a left lens group and a right lens group fixed on the lens module support, a hand wheel, a first gear fixedly connected with the hand wheel, a second gear meshingly connected with the first gear, a bidirectional screw fixedly connected with the second gear, a first nut threadedly connected on the bidirectional screw and fixedly connected with the left lens group, and a second nut threadedly connected on the bidirectional screw and fixedly connected with the right lens group; the left lens group comprises a left lens support, a left lens fixed in the left lens support, a left polaroid sheet, and a left polaroid support fixed with the left polaroid sheet and on the left lens support; the right lens group comprises a right lens support, a right lens fixed in the right lens support, a right polaroid sheet, and a right polaroid support fixed with the right polaroid sheet and on the right lens support.

[0017] Further, the lens module further comprises a position sensing device, the second gear is fixed on one end of the bidirectional screw, and the position sensing device is fixed on the other end of the bidirectional screw.

[0018] Further, the lens module further comprises a first lens sliding shaft, a second lens sliding shaft and a third lens sliding shaft; the left lens support is provided with a left lens through hole and a left lens groove; the right lens support is provided with a right lens through hole and a right lens groove; the first lens sliding shaft passes through the left lens through hole and the right lens through hole and is fixed on the lens module support at both ends thereof; the second lens sliding shaft passes through the left lens groove and is fixed on the lens module support at both ends thereof; the third lens sliding shaft passes through the right lens groove and is fixed on the lens module support at both ends thereof; the first lens sliding shaft is located above, and the second lens sliding shaft and the third lens sliding shaft are located below.

[0019] The application also provides a residual image elimination method of the visual function training device, wherein the human eye can see the picture between A point, B point, C point and D point through the visual function training device, A point and C point are set as the first picture, B point and D point are set as the second picture, and B point and C point are set as the overlapping picture of the first picture and the second picture; the specific method is as follows:

[0020] The left eye sees the clear effective picture of the first picture through the left light shielding ring, and the residual image between C point and D point of the second picture is shielded and eliminated by the left light shielding ring close to the right light shielding ring; similarly, the right eye sees the clear effective picture of the second picture through the right light shielding ring, and the residual image between A point and B point of the first picture is shielded and eliminated by the right light shielding ring close to the left light shielding ring.

[0021] The application utilizes the characteristics of semi-transparent semi-reflection optical glass to project two display pictures with perpendicular display interfaces and 90-degree difference in polarized light emission to a viewer, and the optical paths of the two display interfaces to the viewer are equal; while the light machine module moves forward and backward, the two displays and left and right extinction circles move left and right synchronously in proportion, ensuring that the viewer sees a clear linkage picture. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0023] Figure 1 is a structural schematic diagram of the visual function training device of the present application;

[0024] Figure 2 is a partial exploded view of the visual function training device of the present application;

[0025] Figure 3 is an exploded view of the light machine module of the visual function training device of the present application;

[0026] Figure 4 is a front view of the light machine module of the visual function training device of the present application;

[0027] Figure 5 is a working schematic diagram of the light machine module of the visual function training device of the present application;

[0028] Figure 6 is a structural schematic diagram of the extinction module of the visual function training device of the present application;

[0029] Figure 7 and Figure 8 is a structural schematic diagram of the left extinction circle of the visual function training device of the present application;

[0030] Figure 9 is a structural schematic diagram of the extinction circle support of the visual function training device of the present application;

[0031] Figure 10 is a layout enlarged view of the extinction module of the visual function training device of the present application;

[0032] Figure 11 and Figure 12 is a structural schematic diagram of the lens module of the visual function training device of the present application;

[0033] Figure 13 is a working state schematic diagram of the light machine module of the visual function training device of the present application at a far point;

[0034] Figure 14 is the working state diagram of the optical machine module of the visual function training device of the present application at the near point. DETAILED DESCRIPTION

[0035] Embodiments of the present application are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar elements or elements having the same or similar functions are denoted throughout by the same or similar reference numerals. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0036] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, in the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0037] The present application discloses a visual function training device to solve the problem that the current large-size 3D visual health care device cannot meet the viewing angle and has the same characteristics after transmitting polarized light, and also realizes multi-dimensional movement of the picture to meet the three-linkage of binocular vision.

[0038] As shown in Figure 1 and Figure 2 The visual function training device of the present application comprises a shell module 1, a lens module 4 fixed in front of the shell module 1, an eyepiece 101 fixed on the lens module 4, a lens module 4 fixed on the eyepiece 101, an optical machine module 3 located in the shell module 1, a support control drive module 2 bearing the optical machine module 3 and located in the shell module 1, a first drive unit 5 driving the optical machine module 3 to move on the support control drive module 2, and a support module 6 supported below the shell module 1.

[0039] As shown in Figure 3 and Figure 4 The optical machine module 3 comprises a shell 14, a first display module fixed on the upper end of the shell 14, a second display module fixed on the rear end of the shell 14, a window glass 13 fixed on the front end of the shell 14, and a semi-transparent semi-reflective optical glass 12 fixed in the shell 14, wherein the semi-transparent semi-reflective optical glass 12 is located between the first display module and the second display module.

[0040] The first display module comprises a first display signal processing board 7 fixed on the upper end of the shell 14, a first display 11 located below the first display signal processing board 7, a first display combination support 10 for fixing the first display signal processing board 7 and the first display 11, and a second driving unit 8 connected between the first display signal processing board 7 and the first display 11.

[0041] The second display module comprises a second display signal processing board 19 fixed on the rear end of the shell 14, a second display 15 located in front of the second display signal processing board 19, a second display combination support 17 for fixing the second display signal processing board 19 and the second display 15, and a third driving unit 18 connected between the second display signal processing board 19 and the second display 15.

[0042] The semi-transmissive and semi-reflective optical glass 12 is located between the first display 11 and the second display 15, the first display 11 and the second display 15 are arranged perpendicular to each other, and the semi-transmissive and semi-reflective optical glass 12 is actually fixed between the opposite corners of the shell 14.

[0043] The shell 14 is located on the support control driving module 2, the first driving unit 5 drives the shell 14 to move forward and backward on the support control driving module 2, the second driving unit 8 drives the first display 11 to move forward and backward on the first display combination support 10, and the third driving unit 18 drives the second display 15 to move forward and backward on the second display combination support 14.

[0044] The first display 11 is horizontally arranged, the surface of the first display 11 is provided with a 90-degree polaroid (not shown in the figure), the horizontally polarized light emitted vertically downward by the first display 11 is projected vertically onto the semi-transmissive and semi-reflective optical glass 12, and after refraction by the semi-transmissive and semi-reflective optical glass 12, the light is projected to the viewer 100 in the horizontal direction; the second display 15 is vertically arranged, the surface of the second display 15 is provided with a 180-degree polaroid (not shown in the figure), and the vertically polarized light emitted by the second display 15 horizontally passes through the semi-transmissive and semi-reflective optical glass 12 and is projected to the viewer 100.

[0045] The semi-transmissive and semi-reflective optical glass 12 is coated with a special film on the glass. The semi-transmissive and semi-reflective optical glass 12 is at an angle of 45° with the horizontal plane, so as to ensure that the optical paths of the display interfaces of the first display 11 and the second display 15 to the semi-transmissive and semi-reflective optical glass 12 are equal. When a natural light is projected onto the semi-transmissive and semi-reflective optical glass 12, the natural light is divided into two paths, one path of light is refracted, and this refracted light is horizontally polarized light, and the other path of light is projected along the incident direction, and this light is vertically polarized light. According to the principle of optical path reversibility (for example, Snell's law), the horizontally polarized light is refracted to the viewer 100, and the vertically polarized light is projected to the viewer 100 along the incident direction. Figure 4As shown, the semi-transparent and semi-reflective optical glass 12 is placed at a 45° angle to the horizontal direction. The corresponding points of the first display 11 and the second display 15 are equidistant from the same point on the semi-transparent and semi-reflective optical glass 12, thereby ensuring that the optical path of all points of the first display 11 and the second display 15 from the viewer's eye is equal.

[0046] The first display 11 is horizontally positioned, and its surface is provided with a horizontal polarizer. The horizontally polarized light emitted vertically downward from the first display 11 is projected vertically onto the semi-transparent and semi-reflective optical glass 12. After being refracted by the semi-transparent and semi-reflective optical glass 12, it is projected horizontally toward the viewer 100. The second display 15 is vertically positioned, and its surface is provided with a vertical polarizer. The vertically polarized light emitted by the second display 15 passes horizontally through (i.e., transmits through) the semi-transparent and semi-reflective optical glass 12 and is projected toward the viewer 100.

[0047] like Figure 5 As shown, the light emitted by the first display 11 and the light emitted by the second display 15 merge together, resulting in two beams of polarized light with a 90° phase difference. These beams pass through polarizers configured in the lens module 4: a horizontal polarizer on the left displays the image from the first display 11, and a vertical polarizer on the right displays the image from the second display 15. This binocular merging produces naked-eye 3D vision. Simultaneously, the first display 11 and the second display 15 move left and right via a drive device, coordinating with the forward and backward movement of the outer casing 14. This achieves visual adjustment and convergence linkage, thus providing a vision-care effect.

[0048] To ensure the best possible image quality for every viewer, such as Figure 1 As shown, the visual function training device of the present invention also includes an extinction module 200, which is fixed on the bracket control drive module 2 and located between the optomechanical module 3 and the lens module 4.

[0049] like Figure 6 As shown, the matting module 200 includes a left matting ring 26, a right matting ring 27, and a matting ring bracket 28. The left matting ring 26 and the right matting ring 27 are movably fixed on the matting ring bracket 28.

[0050] like Figure 7 and Figure 8 As shown, both the left matte ring 26 and the right matte ring 27 include a frame 261 composed of four opposing sides, a first snap-fit ​​groove 262 fixed to the upper surface of the frame 261, and two second through-hole fasteners 263 fixed to the lower surface of the frame 261.

[0051] The frame 261 has front openings 2611 located at the front ends of the four sides and rear openings 2612 located at the rear ends of the four sides. For example... Figure 9As shown, the extinction ring bracket 28 includes a bracket body 281, a left opening 2811 and a right opening 2812 located on the bracket body 281 and respectively corresponding to the left extinction ring 26 and the right extinction ring 27, a first light baffle 283 connected to the bracket body 281 and extending from one end of the left opening 2811 toward the direction of the optical engine module 3, a second light baffle 284 connected to the bracket body 281 and extending from one end of the right opening 2812 toward the direction of the optical engine module 3, an intermediate plate 285 located between the first light baffle 283 and the second light baffle 284, and an upper plate 286 and a lower plate 284 respectively connected to both ends of the intermediate plate 285. Plate 287, two first upper positioning members 2881 located at the upper end of the first light baffle 283 and the upper end of the middle plate 285 near the first light baffle 283 respectively, two first lower positioning members 2882 located at the lower end of the first light baffle 283 and the lower end of the middle plate 285 near the first light baffle 283 respectively, two second upper positioning members 2883 located at the upper end of the second light baffle 284 and the upper end of the middle plate 285 near the second light baffle 284 respectively, and two second lower positioning members 2884 located at the lower end of the second light baffle 284 and the lower end of the middle plate 285 near the second light baffle 284 respectively.

[0052] The first light baffle 283 extends from the front opening 2611 of the left extinction ring 26 into the frame 261 of the left extinction ring 26; the second light baffle 284 extends from the front opening 2611 of the right extinction ring 27 into the frame 261 of the right extinction ring 27. The first light baffle 283 and the second light baffle 284 are located within the left extinction ring 26 and the right extinction ring 27, respectively. The left extinction ring 26 and the first light baffle 283 form a left aperture with a variable light transmission area, and the right extinction ring 27 and the second light baffle 284 form a right aperture with a variable light transmission area. The first snap-fit ​​groove 262 of the left matte ring 26 is located between the two first upper positioning members 2881, and the second through-hole fixing member 263 of the left matte ring 26 is located between the two first lower positioning members 2882; the first snap-fit ​​groove 262 of the right matte ring 27 is located between the two second upper positioning members 2883, and the second through-hole fixing member 263 of the right matte ring 27 is located between the two second lower positioning members 2884.

[0053] like Figure 10 As shown, the matte module 200 also includes a first sliding shaft 291, a second sliding shaft 292, a third sliding shaft 293, and a fourth sliding shaft 294.

[0054] The first sliding shaft 291 is fixed at both ends in two first upper positioning members 2881 of the light circle support 28 by screws, and the first sliding shaft 291 controls the front and back cooperation gap of the left light circle 26 in a reasonable range through the first buckle groove member 262 of the left light circle 26. The second sliding shaft 292 is fixed at both ends in two first lower positioning members 2882 of the light circle support 28 by screws, and the second sliding shaft 292 controls the up and down and front and back cooperation gap of the left light circle 26 in a reasonable range through the two second perforated fixing members 263 of the left light circle 26.

[0055] The fixing mode of the first sliding shaft 291 and the second sliding shaft 292 can ensure the smooth left and right movement of the left light circle 26 and control the front and back swing amount in a reasonable range, and at the same time, reduce the technical requirements of injection molding process and improve the yield.

[0056] The third sliding shaft 293 is fixed at both ends in two second upper positioning members 2883 of the light circle support 28 by screws, and the third sliding shaft 293 controls the front and back cooperation gap of the right light circle 27 in a reasonable range through the first buckle groove member 262 of the right light circle 27. The fourth sliding shaft 294 is fixed at both ends in two second lower positioning members 2884 of the light circle support 28 by screws, and the fourth sliding shaft 294 controls the up and down and front and back cooperation gap of the left light circle in a reasonable range through the two second perforated fixing members 263 of the right light circle 27.

[0057] The fixing mode of the third sliding shaft 293 and the fourth sliding shaft 294 can ensure the smooth left and right movement of the right light circle and control the front and back swing amount in a reasonable range, and at the same time, reduce the technical requirements of injection molding process and improve the yield.

[0058] The first driving unit 5 includes a driving motor 52, a driving transmission belt 51, two sliding rods 53 fixedly connected with both sides of the housing 14 of the light machine module 3 respectively, a sliding block 54 connected with the driving transmission belt 51 and fixedly connected with the light machine module 3, a rotating shaft wheel 55 connected with the driving transmission belt 51, a first gear 56 connected with the rotating shaft wheel 55, a second gear 57 engaged with the first gear 56, a bidirectional transmission screw 58 connected with the second gear 57, and two connecting bearings 59; one of the connecting bearings 59 is connected with the bidirectional transmission screw 58 and the second sliding shaft 292, and the other connecting bearing 59 is connected with the bidirectional transmission screw 58 and the fourth sliding shaft 294; one end of the driving transmission belt 51 is sleeved on the gear (not shown) of the driving motor 52, and the other end of the driving transmission belt 51 is sleeved on the rotating shaft wheel 55.

[0059] The slider 54 is fixedly connected with the optical engine module 3 and is in meshing transmission connection with the driving transmission belt 51. One end of the driving transmission belt 51 is in meshing transmission connection with the gear of the driving motor 52, and the other end of the driving transmission belt 51 is in meshing transmission connection with the rotating shaft wheel 55. When the driving motor 52 works, the gear of the driving motor 52 drives the driving transmission belt 51 to move, the slider 54 drives the optical engine module 3 to move forward and backward on the sliding rod 53, and the rotating shaft wheel 55 is driven to rotate, the rotating shaft wheel 55 is fixedly connected with the first gear 56, the first gear 56 is driven to rotate by the rotating shaft wheel 55, and the first gear 56 drives the second gear 57 to drive the bidirectional transmission screw 58 to work at the same time.

[0060] When the rotating shaft wheel 55 is connected with the driving transmission belt 51, the transmission direction of the first driving unit 5 is changed, the bidirectional transmission screw 58 and the sliding rod 53 are perpendicular to each other, so that when the driving motor 52 drives the optical engine module 3 to move forward and backward, the left extinction ring 26 and the right extinction ring 27 also move left and right at the same time.

[0061] The driving transmission belt 51 is a toothed belt, the transmission of the toothed belt reduces the structural space and has low running noise.

[0062] In the embodiment, the left and right moving distances of the left extinction ring 26 and the right extinction ring 27 are both 11 mm, the forward and backward moving distances of the optical engine module 3 are 68 mm, and the left extinction ring 26, the right extinction ring 27 and the optical engine module 3 move towards each other under the driving of the first driving unit 5. The left extinction ring 26 and the right extinction ring 27 play a role in physical extinction, can ensure that the images of the first display 11 and the second display 15 are seen through the left extinction ring 26 and the right extinction ring 26 in the accuracy of movement, and have a better effect of vision care.

[0063] As shown in Figure 11 and Figure 12 The lens module 4 comprises a lens module support 41, a left lens group and a right lens group fixed on the lens module support 41, a hand wheel 441, a first gear 442 fixedly connected with the hand wheel 441, a second gear 443 in meshing connection with the first gear 442, a bidirectional screw 444 fixedly connected with the second gear 443, a first nut 445 threadedly connected with the bidirectional screw 444 and fixedly connected with the left lens group, a second nut 446 threadedly connected with the bidirectional screw 444 and fixedly connected with the right lens group, and a position sensing device 447.

[0064] The left lens group comprises a left lens holder 421, a left lens 422 fixed in the left lens holder 421, a left polaroid 423, and a left polaroid holder 424 fixed to the left polaroid 423 and fixed on the left lens holder 421. The right lens group comprises a right lens holder 431, a right lens 432 fixed in the right lens holder 431, a right polaroid 433, and a right polaroid holder 434 fixed to the right polaroid 433 and fixed on the right lens holder 431.

[0065] The left lens holder 421 of the left lens group is fixedly connected with the first nut, and the right lens holder 431 of the right lens group is fixedly connected with the second nut, so that when the bidirectional screw rod 444 is driven to rotate by the second gear 442, the left lens group and the right lens group are simultaneously driven to rotate.

[0066] The lens module 4 further comprises a first lens sliding shaft 451, a second lens sliding shaft 452, and a third lens sliding shaft 453. The first lens sliding shaft 451 passes through between the left lens group and the right lens group and is fixed at two ends thereof on the lens module holder 41. The second lens sliding shaft 452 passes through the left lens group and is fixed at two ends thereof on the lens module holder 41. The third lens sliding shaft 453 passes through the right lens group and is fixed at two ends thereof on the lens module holder 41. The first lens sliding shaft 451 is located at the upper side, and the second lens sliding shaft 452 and the third lens sliding shaft 453 are located at the lower side, or the first lens sliding shaft 451 is located at the lower side, and the second lens sliding shaft 452 and the third lens sliding shaft 453 are located at the upper side.

[0067] In the embodiment, the first lens sliding shaft 451 passes through between the left lens holder 421 and the right lens holder 431 and is located at the upper end of the left lens 422 and the right lens 433. The second lens sliding shaft 452 passes through the left lens holder 421 and is located at the lower end of the left lens 422. The third lens sliding shaft 453 passes through the right lens holder 431 and is located at the lower end of the right lens 432.

[0068] The lens module holder 41 is provided with a first lens positioning member 411 fixed at two ends of the first lens sliding shaft 451, a second lens positioning member 412 fixed at two ends of the second lens sliding shaft 452, and a third lens positioning member 413 fixed at two ends of the third lens sliding shaft 453.

[0069] The left lens holder 421 is provided with a left lens through hole 4211 through which the first lens sliding shaft 451 passes, and a left lens groove 4212 through which the second lens sliding shaft 452 passes. The right lens holder 431 is provided with a right lens through hole 4311 through which the first lens sliding shaft 451 passes, and a right lens groove 4312 through which the third lens sliding shaft 453 passes.

[0070] The eyepiece 101 is fixed on one side of the lens module support 41, and the left lens group 42 and the right lens group 42 are fixed on the other side of the lens module support 41.

[0071] During operation, the hand wheel 441 is rotated to drive the first gear 442, the first gear 442 meshes with the second gear 443, and thus the first gear 442 drives the second gear 443 to move; the second gear 443 is fixed on one end of the bidirectional screw rod 444, and the bidirectional screw rod 444 is fixedly connected with the left lens group and the right lens group through the first nut 445 and the second nut 446, so that the bidirectional screw rod 444 can drive the left lens group and the right lens group to move towards each other.

[0072] The center distance between the left lens 422 and the right lens 433 is changed by rotating the hand wheel 441, the first gear 442 and the second gear 443 to rotate the bidirectional screw rod 444, and moving the left lens group and the right lens group towards each other through the first nut 445 and the second nut 446, so that the center distance between the left lens 422 and the right lens 433 is changed between 58-70mm, and the lens center distance is matched with the pupil distance of the viewer.

[0073] A position sensing device 447 is arranged on one end of the bidirectional screw rod 444, and the left polarizing glass sheet 423 and the left polarizing glass support 424, and the right polarizing glass sheet 433 and the right polarizing glass support 434 are arranged on the direction of the lens towards the light extinction module, so that the polarizing angle can be finely adjusted to be consistent with the polarizing angle of the corresponding display to the greatest extent, and the viewed picture is the clearest.

[0074] As shown in Figure 13 The human eye can sequentially see the pictures between A point and D point through the present visual function training device, wherein the first picture is between A point and C point, the second picture is between B point and D point, and the overlapping picture of the first picture and the second picture is between B point and C point.

[0075] The first picture is a transmission picture, and the most ideal is 90-degree polarized light. The second picture is a refraction picture, and the most ideal is 180-degree polarized light. In fact, the semi-transmissive and semi-reflective optical glass 12 has a filtering and purifying effect on the polarized light emitted by the first display module and the second display module, so that the left eye can still see the faint image of the refracted second picture (referred to as residual image), and the right eye can also see the faint residual image of the transmitted first picture. The left light extinction circle 26 and the right light extinction circle 27 are designed to eliminate the above-mentioned residual image: the left eye passes through the left light extinction circle 26 to see the clear and effective picture of the first picture between points A and C, and the residual image between points C and D of the second picture is blocked by the L point of the left light extinction circle 26. Similarly, the right eye passes through the right light extinction circle 26 to see the clear and effective picture of the second picture between points B and D, and the residual image of the first picture between points A and B is blocked by the R point of the right light extinction circle 26. The part between points B and C is the picture overlap part, and this part of residual image cannot be seen under the contrast of the effective clear picture that can be seen by the left and right eyes, and the purpose of visual function training is achieved.

[0076] That is, the light engine module 3 moves forward and backward by a distance of 68mm, the left light extinction circle 26 and the right light extinction circle 27 each move left and right by a distance of 11mm, and the 90-degree polarized light sheet 111 and the 180-degree polarized light sheet are provided with a fine adjustment mechanism. When installed, the residual image elimination effect is best through fine adjustment. The first display module adopts a display with 90-degree light output, and the picture light passes through the semi-transmissive and semi-reflective optical glass 12, passes through the 90-degree polarized light glass, and then passes through the lens to reach the left eye of the viewer. The second display module adopts a display with 180-degree light output, and the picture light is vertically projected to the semi-transmissive and semi-reflective optical glass 12, half of the light is refracted to the horizontal direction, passes through the 180-degree polarized light glass, and then passes through the lens to reach the right eye of the viewer.

[0077] In theory, the left and right eyes can divide the left and right pictures to see a 3D picture through binocular image combination. However, a small amount of scattered light emitted from the surface of the display can cross the polarized light glass and be felt by the eyes as a faint image (residual image). That is, if the left picture is turned off, the left eye can see the residual image of the right picture. However, if the left picture is turned on, because more than 90% of the light of the left picture is at the same polarization angle as the polarized light glass in front of the left eye, the left eye can see the bright left picture, and the residual image of the overlapping part of the right picture and the left picture will not affect the observation quality of the left eye. However, the residual image outside the left picture will still affect the observation quality of the left eye, and the right eye is the same.

[0078] The left light extinction circle and the right light extinction circle of the present application solve the residual image problem well, and greatly reduce the cost compared with the PBS light splitting plate of the prior art.

[0079] In work, the front and back movements of the light extinction module and the light engine module are linked. When the light engine module is at the far end, the distance between the light engine module and the left light extinction circle and the right light extinction circle is the largest (for example, Figure 13), the light machine module is closest to the left and right light extinction rings (as shown in Figure 14 The residual image is always blocked out of the visual field of the left and right eyes.

[0080] The application also discloses a residual image elimination method of the visual function training device.

[0081] The left eye sees the clear and effective picture of the first picture between the A point and the C point through the left light extinction ring 26, and the residual image between the C point and the D point of the second picture is blocked by the left light extinction ring 26 close to the right light extinction ring; similarly, the right eye sees the clear and effective picture of the second picture between the B point and the D point through the right light extinction ring 26, and the residual image between the A point and the B point of the first picture is blocked by the right light extinction ring 26 close to the left light extinction ring. The left and right moving distances of the left light extinction ring 26 and the right light extinction ring 27 are both 11 mm, and the front and back moving distance of the light machine module 3 is 68 mm; the left light extinction ring 26, the right light extinction ring 27 and the light machine module 3 are driven by the first driving unit 5 and move towards each other. The left light extinction ring 26 and the right light extinction ring 27 play a role in physically blocking light, which can ensure that the images of the first display 11 and the second display 15 are seen through the left light extinction ring 26 and the right light extinction ring 26 in the accuracy of movement, so as to achieve a better visual health care effect.

[0082] The synchronization relationship of the application is that when the light machine module 6 moves forward to the maximum distance, the left light extinction ring 26 and the right light extinction ring 26 both move to the middle by the maximum distance, so that when the picture is seen through the left light extinction ring 26 and the right light extinction ring 26, the picture seen by the left and right eyes is always a clear and effective picture, and the redundant residual image interference is blocked.

[0083] The horizontally polarized light emitted vertically downward by the first display is projected vertically onto the semi-transmissive and semi-reflective optical glass, and after refraction, the light is projected to the viewer along the horizontal direction; the vertically polarized light emitted by the second display horizontally passes through (i.e., transmits) the semi-transmissive and semi-reflective optical glass and is projected to the viewer, and the superimposed left and right pictures of the mutually 90-degree light are formed by transmission and refraction; the application adopts the light extinction module and the light blocking device moves synchronously with the light machine module, which solves the problem of residual image interference.

[0084] The application uses a semi-transmissive and semi-reflective optical glass plate, i.e., a special film is coated on the glass to realize the effect that light can be refracted and projected, thereby reducing the cost; the application makes the semi-transmissive and semi-reflective optical glass plate have light splitting effect through the light extinction module and the driving unit, so that the light images of the first display and the second display can be simultaneously and accurately projected to the viewer through the semi-transmissive and semi-reflective optical glass plate; and the left light extinction ring, the right light extinction ring and the light machine module can move cooperatively to realize multi-dimensional movement of the picture to meet the three-linkage of binocular vision, achieve the linkage of eye visual adjustment and convergence and play a role in visual health care.

[0085] The application utilizes the characteristics of the semi-transparent semi-reflective optical glass to project two display pictures to the viewer, the display interfaces of which are perpendicular to each other and the polarized light emitted by which differs by 90 degrees, and the optical paths of the two display interfaces to the viewer are equal; while the optical-mechanical module moves forward and backward, the two displays and the left and right extinction circles move left and right synchronously in proportion, so as to ensure that the viewer sees clear linkage pictures.

[0086] The above disclosed is only one preferred embodiment of the application, of course, cannot be limited by this to limit the scope of the application, the person skilled in the art can understand that the whole or part of the above-mentioned embodiment is realized, and the equivalent changes made according to the claims of the application still belong to the scope covered by the application.

Claims

1. A visual function training device, comprising a light machine module (3) and a lens module (4) located in front of the light machine module (3), the light machine module (3) comprising a housing (14), a first display module fixed on the upper end of the housing (14), and a second display module fixed on the rear end of the housing (14), characterized in that, The optical machine module (3) further comprises a semi-transmissive and semi-reflective optical glass (12) located in the shell (14), the semi-transmissive and semi-reflective optical glass (12) is located between the first display module and the second display module and forms a 45° angle with the horizontal plane, the first display module comprises a first display (11), the second display module comprises a second display (15), and the display interfaces of the first display (11) and the second display (15) have equal optical paths to the semi-transmissive and semi-reflective optical glass (12); The visual function training device further comprises an extinction module (200) located between the optical machine module (3) and the lens module (4), the extinction module (200) comprises a left extinction ring (26), a right extinction ring (27) and an extinction ring support (28); the left extinction ring (26) and the right extinction ring (27) are movably fixed on the extinction ring support (28); the extinction ring support (28) comprises a first light baffle (283) located in the left extinction ring (26) and a second light baffle (284) located in the right extinction ring (27); wherein the left extinction ring (26) and the first light baffle (283) constitute a left light ring with a variable light passing area, and the right extinction ring (27) and the second light baffle (284) constitute a right light ring with a variable light passing area; The visual function training device further comprises a driving unit (5) for driving the optical machine module (3) to move forward and backward and simultaneously driving the left extinction ring (26) and the right extinction ring (27) to move left and right, the driving unit (5) is fixedly connected with the optical machine module (3), the left extinction ring (26) and the right extinction ring (27); The extinction ring support (28) further comprises a support body (281), and a left opening (2811) and a right opening (2812) located on the support body (281) and corresponding to the left extinction ring (26) and the right extinction ring (27), respectively; the first light baffle (283) is arranged to extend from one end of the left opening (2811) to the direction of the optical machine module (3); the second light baffle (284) is arranged to extend from one end of the right opening (2812) to the direction of the optical machine module (3); The light extinction ring support (28) further comprises an intermediate plate (285) between the first light baffle (283) and the second light baffle (284), an upper plate (286) and a lower plate (287) connected to both ends of the intermediate plate (285) respectively, two first upper positioning members (2881) respectively located at the upper end of the first light baffle (283) and the intermediate plate (285) close to the upper end where the first light baffle (283) is located, two first lower positioning members (2882) respectively located at the lower end of the first light baffle (283) and the intermediate plate (285) close to the lower end where the first light baffle (283) is located, two second upper positioning members (2883) respectively located at the upper end of the second light baffle (284) and the intermediate plate (285) close to the upper end where the second light baffle (284) is located, and two second lower positioning members (2884) respectively located at the lower end of the second light baffle (284) and the intermediate plate (285) close to the lower end where the second light baffle (284) is located.

2. The visual function training apparatus according to claim 1, characterized in that: The left light extinction ring (26) and the right light extinction ring (27) each comprise a frame body (261), a first buckle groove member (262) fixed to the upper surface of the frame body (261), and two second perforated fixing members (263) fixed to the lower surface of the frame body (261).

3. The visual function training apparatus according to claim 2, characterized in that: The frame body (261) is composed of four opposite sides, and the frame body (261) is provided with a front opening (2611) at the front end of the four sides and a rear opening (2612) at the rear end of the four sides; the first light baffle (283) extends from the front opening (2611) of the left light extinction ring (26) into the frame body (261) of the left light extinction ring (26); and the second light baffle (284) extends from the front opening (2611) of the right light extinction ring (27) into the frame body (261) of the right light extinction ring (27).

4. The visual function training apparatus of claim 1, wherein: The first buckle groove member (262) of the left light extinction ring (26) is located between the two first upper positioning members (2881), and the second perforated fixing member (263) of the left light extinction ring (26) is located between the two first lower positioning members (2882); the first buckle groove member (262) of the right light extinction ring (27) is located between the two second upper positioning members (2883), and the second perforated fixing member (263) of the right light extinction ring (27) is located between the two second lower positioning members (2884).

5. The visual function training apparatus of claim 4, wherein: The extinction module (200) further comprises a first sliding shaft (291), a second sliding shaft (292), a third sliding shaft (293) and a fourth sliding shaft (294); the first sliding shaft (291) is fixed at both ends in two first upper positioning members (2881) of the extinction ring support (28) by screws, and the first sliding shaft (291) controls the front and rear fitting gap of the left extinction ring (26) in a reasonable range through the first buckle groove member (262) of the left extinction ring (26); the second sliding shaft (292) is fixed at both ends in two first lower positioning members (2882) of the extinction ring support (28) by screws, and the second sliding shaft (292) controls the up and down front and rear fitting gap of the left extinction ring (26) in a reasonable range through the two second perforated fixing members (263) of the left extinction ring (26); the third sliding shaft (293) is fixed at both ends in two second upper positioning members (2883) of the extinction ring support (28) by screws, and the third sliding shaft (293) controls the front and rear fitting gap of the right extinction ring (27) in a reasonable range through the first buckle groove member (262) of the right extinction ring (27); the fourth sliding shaft (294) is fixed at both ends in two second lower positioning members (2884) of the extinction ring support (28) by screws, and the fourth sliding shaft (294) controls the up and down front and rear fitting gap of the right extinction ring (27) in a reasonable range through the two second perforated fixing members (263) of the right extinction ring (27).

6. The visual function training apparatus of claim 1, wherein: The first display module comprises a first display signal processing board (7) fixed on the upper end of the shell (14), a first display (11) located below the first display signal processing board (7), a first display combination support (10) for fixing the first display signal processing board (7) and the first display (11), and a second driving unit (8) connected between the first display signal processing board (7) and the first display (11); the second display module comprises a second display signal processing board (19) fixed on the rear end of the shell (14), a second display (15) located in front of the second display signal processing board (19), a second display combination support (17) for fixing the second display signal processing board (19) and the second display (15), and a third driving unit (18) connected between the second display signal processing board (19) and the second display (15).

7. The visual function training apparatus of claim 1, wherein: The lens module (4) comprises a lens module support (41), a left lens group and a right lens group fixed on the lens module support (41), a hand wheel (441), a first gear (442) fixedly connected with the hand wheel (441), a second gear (443) meshingly connected with the first gear (442), a bidirectional screw rod (444) fixedly connected with the second gear (443), a first nut (445) threadedly connected on the bidirectional screw rod (444) and fixedly connected with the left lens group, and a second nut (446) threadedly connected on the bidirectional screw rod (444) and fixedly connected with the right lens group; the left lens group comprises a left lens support (421), a left lens (422) fixed in the left lens support (421), a left polaroid glass sheet (423), and a left polaroid glass support (424) fixedly connecting the left polaroid glass sheet (423) and fixed on the left lens support (421); the right lens group comprises a right lens support (431), a right lens (432) fixed in the right lens support (431), a right polaroid glass sheet (433), and a right polaroid glass support (434) fixedly connecting the right polaroid glass sheet (433) and fixed on the right lens support (431).

8. The visual function training apparatus of claim 7, wherein: The lens module (4) further comprises a position sensing device (447), the second gear (443) is fixed on one end of the bidirectional screw rod (444), and the position sensing device (447) is fixed on the other end of the bidirectional screw rod (444).

9. The visual function training apparatus of claim 7, wherein: The lens module (4) further comprises a first lens sliding shaft (451), a second lens sliding shaft (452), and a third lens sliding shaft (453); the left lens support (421) is provided with a left lens through hole (4211) and a left lens groove (4212); the right lens support (431) is provided with a right lens through hole (4311) and a right lens groove (4312); wherein the first lens sliding shaft (451) passes through the left lens through hole (4211) and the right lens through hole (4311) and is fixed on the lens module support (41) at both ends thereof; the second lens sliding shaft (452) passes through the left lens groove (4212) and is fixed on the lens module support (41) at both ends thereof; the third lens sliding shaft (453) passes through the right lens groove (4312) and is fixed on the lens module support (41) at both ends thereof; the first lens sliding shaft (451) is located above and the second lens sliding shaft (452) and the third lens sliding shaft (453) are located below.

10. The method of afterimage elimination of the visual function training apparatus according to any one of claims 1 to 9, characterized by, The specific method is as follows: The left eye sees the first picture through the left obscuring circle, and the residual image between the C point and the D point of the second picture is obscured by the left obscuring circle close to the right obscuring circle; Similarly, the right eye sees the second picture through the right obscuring circle, and the residual image between the A point and the B point of the first picture is obscured by the right obscuring circle close to the left obscuring circle.

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