Screen magnification display device

Abstract

The invention discloses a screen magnification display device. The screen magnification display device comprises an upper shell, a lower shell, a connecting mechanism and a foot stool, a first reflector is installed on the inner side of the upper shell and receives images of the display module below the first reflector. A second reflector is installed on the inner side of the lower shell, receives the reflected image projected by the first reflector, reflects the reflected image and projects the reflected image forwards to form a projected image. The connecting mechanism is connected with one end of the upper shell and one end of the lower shell, so that an included angle is formed between the first reflector and the second reflector, and the projection direction of the projected image intersects with the projection direction of the image of the display module. The foot stand is arranged on the outer side of the lower shell. Wherein the second reflector is configured to reduce image distortion of the first reflector.

Description

Technical Field

[0001] The invention relates to an optical device, in particular to a screen magnifying display device for projecting the image below the screen forward. Background Art

[0002] Due to the popularity of mobile phones, tablets, books and toys, the increasing proportion of children with myopia is a problem faced by all countries. In addition to genetic factors, long-term close-range eye use is also one of the main causes of myopia.

[0003] Ophthalmologists often recommend keeping a distance of 30 cm when reading or writing, and 60 cm when looking at a computer. 30 cm and 60 cm are not some magic numbers that are necessary for eye health. To be frank, it is because of the limitation of the operating distance and the size of the text and patterns on the screen and the book. If it is too far away, it will be difficult to see clearly, so there is such a suggestion. If the operating distance is not limited, for example, when using a computer mouse, the screen can be farther away than the book, and the text and patterns can be enlarged, then whether it is a book or a computer screen, the farther the visual distance, the better for eye health.

[0004] Shortening the time spent looking at close objects means reducing the time spent writing, which may bring the risk of academic performance decline. It is unrealistic to prevent children from playing with mobile phones and deprive them of their leisure time. The option that will least affect academic performance and leisure is to increase the visual distance for reading and writing. However, unless the font and the picture are enlarged, the eye's recognition ability will decrease as the visual distance is increased, which can easily cause eyestrain. Moreover, the increased visual distance may exceed the range that can be operated by both hands. The natural visual distance limit for reading and writing is about 40 centimeters. To increase the visual distance, we may have to rely on the assistance of new technology.

[0005] The prior art (M569860) has disclosed a screen magnifying display device, which includes a tripod, a display module, a first reflector and a second reflector. At least one of the two reflectors is a concave mirror. Therefore, this screen magnifying device uses the virtual image imaging principle of the concave mirror to magnify the image of the display module several times and image it at a position several times longer than the object distance. The display module is connected to the electronic product through an input interface, and the image stored in the electronic product is magnified for viewing, which can effectively reduce the burden on the eyes. However, this imaging optical path also limits its image input source to electronic data such as wired or plug-in cards. Summary of the invention

[0006] The object of the present invention is to provide a screen magnification display device.

[0007] For the above purposes, the present invention provides a screen magnifying display device, which includes an upper housing, a lower housing, a tripod, and a connecting mechanism. A first mirror is installed inside the upper housing to receive the image of the display module below it. A second mirror is installed inside the lower housing to receive the reflected image projected from the first mirror, reflect the reflected image and project it forward to form a projected image. The connecting mechanism connects one end of the upper housing and the lower housing, so that the first mirror and the second mirror form an included angle, and the projection direction of the projected image intersects with the projection direction of the image of the display module. The tripod is arranged on the outer side of the lower housing. Among them, the second mirror is configured to reduce the image distortion of the first mirror.

[0008] Preferably, the first mirror is a concave mirror or a free-form mirror, and the second mirror is one of a concave mirror, a convex mirror, or a free-form mirror.

[0009] Preferably, the connecting mechanism is a first rotating shaft mechanism, which includes an axis, the flipping piece has a locking block, and the locking base has an arc-shaped guide groove. The flipping piece and the locking base are respectively connected to the upper housing and the lower housing and are both sleeved on the axis, and the locking block is accommodated in the arc-shaped guide groove.

[0010] Preferably, the range of the included angle is between 50 degrees and 70 degrees.

[0011] Preferably, on the side of the lower housing away from the connecting mechanism, it protrudes forward to form a base, and the upper surface of the base is used to install the display module.

[0012] Preferably, the lower housing is provided with a hidden lens, and the hidden lens is arranged behind the second mirror and in the same direction as the projection direction of the projected image.

[0013] Preferably, a lens is arranged on the side of the upper housing away from the connecting mechanism, and the lens faces and captures the image below or in the front lower part of the lower housing.

[0014] Preferably, at least one of the upper housing and the lower housing is installed with a circuit board, and the circuit board is electrically connected to the display module, and is electrically connected to at least one or a combination selected from the group consisting of a sound unit, a radio unit, a lens, a transmission unit, and an input interface.

[0015] Preferably, the circuit board further includes a processing unit for repairing the local distortion of the projected image.

[0016] Preferably, the tripod and the lower housing are connected by a second rotating shaft mechanism. Description of the Drawings

[0017] Figure 1 is a view of an implementation aspect of the screen magnifying display device.

[0018] Figure 2 is Figure 1Another view of the screen magnification display device.

[0019] Figure 3 is Figure 1 A sectional view of the screen magnification display device.

[0020] Figure 4 It is a schematic optical path diagram of the screen magnification display device.

[0021] Figure 5 、 Figure 6 It is a schematic optical path diagram of the optical distortion generated by the mirror.

[0022] Figure 7 It is a schematic optical path diagram of the optical distortion correction between two mirrors.

[0023] Figure 8 It is a schematic diagram of the rotating shaft structure of the screen magnification display device.

[0024] Figure 9 It is a sectional view of the rotating shaft structure of the screen magnification display device.

[0025] Figure 10 It is a block diagram of the electronic components included in the screen magnification display device.

[0026] Description of reference numerals: 10 - upper housing; 12 - first mirror; 13 - shaft housing; 131 - rear end; 14 - flip cover; 15 - lens; 20 - lower housing; 22 - second mirror; 23 - shaft housing; 25 - hidden lens; 26 - base; 27 - rotating shaft outer cover; 271 - flange; 30 - tripod; 31 - second rotating shaft mechanism; 40 - first rotating shaft mechanism; 41 - axis center; 441 - locking block; 44 - flipping piece; 46 - locking base; 461 - arc-shaped guide groove; 465 - connecting plate; 50 - display module; 60 - circuit board; 61 - processing unit; 62 - input interface; 63 - transmission unit; 70 - speaker unit; 71 - microphone unit; O - object; O’, O” - virtual image; E - eye; I - projected image. Detailed implementation manners

[0027] The following description is made with the light projection direction of the second mirror defined as the front (i.e., the positive direction of the Y direction in the figure). The space formed by the included angle between the first mirror and the second mirror is defined as the inner side of the screen magnification display device, and vice versa for the outer side, so as to facilitate understanding of the relative positions of the components. As an example, when using the screen magnification display device, the viewer is located in front of the second mirror, and the expected magnified image is seen behind the screen magnification display device.

[0028] Please refer to Figures 1 to 4, which shows a screen magnifying display device, including an upper housing 10, a lower housing 20, a connecting mechanism, and a tripod 30. A first mirror 12 is installed inside the upper housing 10, and a second mirror 22 is installed inside the lower housing 20. The connecting mechanism connects one side of the upper housing 10 and the lower housing 20, so that the first mirror 12 and the second mirror 22 form an included angle, and the range of the included angle is between 50 degrees and 70 degrees.

[0029] The tripod 30 is arranged outside the lower housing 20, and the optical path formed between the upper housing 10 and the lower housing 20 is erected at a preset height, so that the first mirror 12 receives the image of the display module 50 below it, and the second mirror 22 receives a reflected image projected from the first mirror 12, and then reflects the reflected image and projects it forward to the eye E to form a projected image I. At this time, the projection direction of the projected image I intersects with the projection direction of the image presented by the display module 50. In this way, for the viewer, the image of the display module 50 will form a projected image I behind the lower housing 20.

[0030] The combined optical path formed by the first mirror 12 and the second mirror 22 is used to magnify the image of the display module 50 and extend its image distance. Specifically, the first mirror 12 is a concave mirror or a free-form mirror, and the second mirror 22 is one of a concave mirror, a convex mirror, or a free-form mirror.

[0031] If a concave mirror is used, each magnification will cause distortion due to off-axis aberration, resulting in the distortion of the picture. The degree of distortion is proportional to the cube of the vertical height of the image point from the optical axis. Therefore, a concave mirror can be designed to cancel out most of the positive and negative distortion distortions to reduce the distortion. In other words, the second mirror 22 can be further constructed to reduce the image distortion of the first mirror 12, or the first mirror 12 and the second mirror 22 can each correct a part of the optical distortion, so that the display module 50 presents better image quality in the final combined optical path, and the viewer can maintain the sitting posture without changing, achieving the best viewing angle and reading comfort.

[0032] Please refer to Figures 5 to 7 , which is one of the correction methods for optical distortion. In this set of figures, the actual light reflection direction is represented by a solid line, and the imaging distance of the virtual image behind the mirror is represented by a dotted line. Please refer to Figure 5 , if the object O is a straight line, the virtual image O' formed by the first mirror 12 will bend downwards. Please refer to Figure 6 , if the virtual image O' of the image projected onto the second mirror 22 is a straight line, then the virtual image O'' of the straight line image presented by the second mirror 22 will warp upwards. Then, please refer to Figure 7, combined with the characteristics of these two first reflectors 12 and second reflector 22, after the second reflector 22 reflects the virtual image O' of the downward-bent image of the first reflector 12, the virtual image O" will be pried upward. By adjusting their curvatures, the two can cancel each other out, so that the image projected onto the user's eyes still remains straight. Further explanation, Figure 7 The object O is the image presented by the display module 50.

[0033] In this embodiment, the tripod 30 and the lower housing 20 are connected by a second rotating shaft mechanism 31. The upper housing 10 and the lower housing 20 are used to define the overall optical path. When the lower housing 20 swings relative to the tripod 30, it can be used to finely adjust the projection angle of the overall optical path, allowing the user to easily obtain an optimized viewing angle.

[0034] In this embodiment, when the lower housing 20 has a base 26 protruding forward, another lens 15 can be provided on the upper housing 10 and adjacent to the housing boundary of the upper housing 10 to capture the image below or in front of the lower housing 20. Place the object O to be imaged, such as a book or a smartphone, within the field of view of the other lens 15, and then display the image of the object O through the display module to see the expected magnified image behind the screen magnifying display device.

[0035] In this embodiment, on the side of the lower housing 20 away from the first rotating shaft mechanism 40, it protrudes forward to form a base 26. The upper surface of the base 26 is parallel to the XY plane for mounting the display module 50. When the display module 50 is mounted on the base 26, the image projection surface of the display module 50 is parallel to the XY plane. The second reflector 22 is inclined backward relative to the image projection surface of the display module 50.

[0036] In this embodiment, the connecting mechanism is a first rotating shaft mechanism 40, which allows the upper housing 10 to flip relative to the lower housing 20 and completely cover the surface of the lower housing 20, forming a storage state of the foldable screen magnifying display device. Correspondingly, when the upper housing 10 and the lower housing 20 form a preset optical path, it is the unfolded state of the foldable screen magnifying display device. When the upper housing 10 is in the storage state, the inner sides of the upper housing 10 and the lower housing 20 are also completely shielded. Therefore, the front of the second reflector 22 and the display module 50 are completely shielded by the upper housing 10, protecting the internal electronic components and reducing the overall volume of the foldable screen magnifying display device.

[0037] Please refer to Figure 1 、 Figure 2 、 Figure 8 、 Figure 9, a connecting mechanism and a first rotating shaft mechanism 40 are drawn. In this embodiment, the shaft housing 23 is a part of the lower housing 20. The shaft housing 23 is located at both ends of one side of the lower housing 20. Shaft housings 13 are also formed at both ends of one side of the upper housing 10 and straddle both ends of the shaft housing 23. An intermediate housing is connected between the two shaft housings 13, and the shaft housing 13 covers a part of the surface of the shaft housing 23. When the upper housing 10 rotates, the surface of the shaft housing 23 can support the shaft housing 13, that is, the surface of the shaft housing 23 serves as a part of the rotating shaft of the shaft housing 13.

[0038] If only the shaft housing 13 and the shaft housing 23 are installed, a chamber for accommodating the first rotating shaft mechanism 40 will be exposed behind the connecting mechanism. Therefore, the connecting mechanism also has a rotating shaft outer cover 27. Both ends of the rotating shaft outer cover 27 are connected to the ends of the adjacent shaft housing 13 and shaft housing 23 to close the chamber for accommodating the first rotating shaft mechanism 40. In addition, the rotating shaft outer cover 27 also extends a flange 271 forward. The flange 271 is located below the upper housing 10. When the upper housing 10 rotates, the surface of the flange 271 can support the rear end 131 of the intermediate housing of the shaft housing 13, that is, the surface of the flange 271 serves as a part of the rotating shaft of the shaft housing 13. In addition, the flange 271 is at least connected or overlapped with a part of the upper housing 10 to prevent the first rotating shaft mechanism 40 from being exposed.

[0039] The first rotating shaft mechanisms 40 are arranged in pairs. Each pair of first rotating shaft mechanisms 40 includes a shaft center 41, a flipping piece 44, and a locking base 46. The flipping piece 44 and the locking base 46 are both sleeved on the shaft center 41. The locking base 46 has an arc-shaped guide groove 461, and the flipping piece 44 has a locking block 441 formed by protruding along the axial direction of the shaft center 41. The locking block 441 is accommodated in the arc-shaped guide groove 461.

[0040] The locking base 46 is fixed to the lower housing 20. The shaft center 41 enables the flipping piece 44 to rotate relative to the locking base 46. A part of the flipping piece 44 is positioned on the lid 14 of the upper housing 10. Therefore, the locking block 441 rotates synchronously with the upper housing 10, and the arc-shaped guide groove 461 limits the degree to which the flipping piece 44 can swing with the shaft center 41 as the rotating shaft, forming an unfolded state and a stored state.

[0041] In addition, the first rotating shaft mechanism 40 further includes a connecting plate 465. Both ends of the connecting plate 465 are respectively positioned on the locking bases 46 of a pair of first rotating shaft mechanisms 40, increasing the stability of the first rotating shaft mechanism 40 in supporting the upper housing 10. Further, the connecting plate 465 can be simultaneously positioned on the lower housing 20.

[0042] In other embodiments, the first rotating shaft mechanism 40 may further include a torsion spring. The two ends of the torsion spring are respectively positioned at the locking base of the lower housing 20 and the flipping piece of the upper housing 10, applying a force to automatically flip the upper housing upward. In addition, the first rotating shaft mechanism 40 may further include a damper to make the upper housing automatically flip relatively slowly and stably.

[0043] In other embodiments, the surface of the lower housing 20 may be recessed inward to form a hand-held groove (not shown in the figure) to provide for holding and carrying the entire screen magnifying display device. An anti-slip surface (such as anti-slip bumps) may also be provided on the surface near the hand-held groove.

[0044] Please refer to Figure 1 , Figure 2 , Figure 10 , in order to increase the application scope of the screen magnifying display device, the screen magnifying display device includes a circuit board 60 located in at least one of the upper housing 10 and the lower housing 20. The circuit board 60 at least includes a processing unit 61, and the processing unit 61 is electrically connected to at least one, a combination of two, or a combination of more than two selected from a speaker unit 70, a sound receiving unit 71, a lens 15, a hidden lens 25, a transmission unit 63, and an input interface 62. The number and types of electronic components inside the screen magnifying display device depend on its preset application scenarios.

[0045] The processing unit 61 includes an image processing chip for corresponding to the screen ratio of the reflected image of the first mirror 12 or / and the second mirror 22, the remaining distortion, local distortion, or other possible aberrations that cannot be corrected between the first mirror 12 and the second mirror 22, to adjust the image of the screen, and to ensure again that the projected image projected onto the eye is suitable, and then display the adjusted image on the display module 50.

[0046] The speaker unit 70 is electrically connected to the processing unit 61 for playing the audio of the image or pure audio input externally, and the sound receiving unit 71 is electrically connected to the processing unit 61 for receiving sounds, such as the sounds of the user.

[0047] The function of the lens 15 has been fully described, so it will not be elaborated here. The lower housing 20 further includes a hidden lens 25 electrically connected to the circuit board 60. The hidden lens 25 is disposed behind the second mirror 22 and faces the same direction as the projection direction of the reflected image of the first mirror 12 (i.e., the front). The hidden lens 25 is used to photograph the front of the screen magnifying display device. For example, it captures the image of the user. As monitoring, the hidden lens 25 can transmit the image through the transmission unit 63. Thus, when an inattentive child uses the screen magnifying display device to watch a movie, the parent can obtain this information from the image captured by the hidden lens 25. When the child leaves the front of the screen magnifying display device, the parent can also know.

[0048] The transmission unit 63 is electrically connected to the processing unit 61. The transmission unit 63 performs wireless transmission by other means such as Bluetooth, WIFI, or network, receives externally input images or audio, and the foregoing images are transmitted through the processing unit 61 (or simultaneously through preprocessing) and serve as the input images for the display module 50.

[0049] The input interface 62 can be, for example: HDMI, DVI, Display Port, D-SUB, or a USB slot, an SD memory card, receives externally input images or audio, and displays the images on the display module 50. The foregoing input interface 62 or transmission unit 63 can be changed to wired transmission or wireless transmission according to requirements, or can be the same unit.

[0050] As described above, this embodiment utilizes the principle of virtual image formation of a concave mirror to magnify an object several times and form an image at a distance several times longer than the object distance, enabling the user's eyes to see the magnified image at a visual distance of more than 7 meters, and the user will not suffer from myopia due to long-term close-range eye use. In addition, based on the optical element design of this embodiment, image distortion of the finally projected image can be eliminated or reduced.

Claims

1. A screen magnification display device, characterized in that, Comprising: An upper housing, inside which a first mirror is installed to receive the image of a display module below it; A lower housing, inside which a second mirror is installed to receive a reflected image projected from the first mirror, reflect the reflected image and project it forward to form a projected image; A connecting mechanism connecting one end of the upper housing and the lower housing, such that the first mirror and the second mirror form an angle, and the projection direction of the projected image intersects with the projection direction of the image of the display module; And A tripod, disposed outside the lower housing; Wherein, the second mirror is configured to reduce the image distortion of the first mirror.

2. The screen magnification display device according to claim 1, characterized in that, The first mirror is a concave mirror or a free-form mirror, and the second mirror is one of a concave mirror, a convex mirror or a free-form mirror.

3. The screen magnification display device according to claim 1, wherein The connecting mechanism is a first rotating shaft mechanism, comprising an axis, a flipping piece having a locking block, and a locking base having an arc-shaped guide groove. The flipping piece and the locking base are respectively connected to the upper housing and the lower housing and are both sleeved on the axis, and the locking block is received in the arc-shaped guide groove.

4. The screen magnification display device according to claim 1, wherein The range of the angle is between 50 degrees and 70 degrees.

5. The screen magnification display device according to claim 1, characterized in that, On the side of the lower housing away from the connecting mechanism, it protrudes forward to form a base, and the upper surface of the base is used to mount the display module.

6. The screen magnification display device according to claim 1, wherein The lower housing is provided with a hidden lens, and the hidden lens is disposed behind the second mirror and in the same direction as the projection direction of the projected image.

7. The screen magnification display device according to claim 1, characterized in that On the side of the upper housing away from the connecting mechanism, a lens is provided, and the lens faces and captures the image below or in the front-lower part of the lower housing.

8. The screen magnification display device according to claim 1, wherein At least one of the upper housing and the lower housing is mounted with a circuit board, and the circuit board is electrically connected to the display module, and is also electrically connected to at least one or a combination selected from a sound unit, a radio unit, a lens, a hidden lens, a transmission unit and an input interface.

9. The screen magnification display device according to claim 8, wherein The circuit board further comprises a processing unit for repairing local distortion of the projected image.

10. The screen magnification display device according to claim 1, wherein, The tripod is connected to the lower housing by a second rotating shaft mechanism.

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