Multifunctional glasses

Abstract

In order to solve the problems that traditional 3D display has depth-of-field limitation and viewers are prone to asthenopia, the invention provides a pair of multifunctional glasses. The multifunctional glasses provided by the invention can also be used as pinhole glasses for correcting children myopia. The multifunctional glasses comprise lenses. The lens comprises a first diaphragm, a second diaphragm and a third diaphragm. The first diaphragm piece, the second diaphragm piece and the third diaphragm piece all comprise small hole arrays, so that an optical combination is formed, and the optical combination forms a virtual aperture diaphragm array. One of the virtual aperture diaphragms in the virtual aperture diaphragm array is located near the pupil of the human eye. The diameter of the virtual aperture diaphragm is smaller than the pupil diameter of the human eye, thereby limiting the imaging beam. Based on the principle of aperture diaphragms, the invention can effectively increase the depth of field, and has the beneficial effect of larger field of view compared with the traditional pinhole glasses.

Description

Technical Field

[0001] The present invention belongs to the field of display technology, and more specifically, relates to a pair of multifunctional glasses. Background Art

[0002] 3D display devices usually have a depth of field limitation, that is, there is a range in which the pixels of the 3D image can form a clear image. Taking the grating 3D display as an example, its 3D pixels form a clear image at the screen position; taking the integrated imaging 3D display as an example, its 3D pixels form a clear image at the center depth plane position. When the stereoscopic scene exceeds its depth of field range, the viewer cannot see a clear image, which can easily lead to visual fatigue. Taking the grating 3D display as an example, when a certain 3D pixel is located 10 cm outside the screen, the human eye should focus on this position according to habit, but because the actual pixel is located at the screen position and forms a clear image there, the human eye cannot see a clear image when it is correctly focused. This deviation between human eye habits and actual focusing can easily cause visual fatigue. To this end, the present invention proposes a multifunctional pair of glasses, which realizes a virtual aperture diaphragm through an optical structure, and the virtual aperture diaphragm can play a selective role in the imaging beam, thereby greatly improving the depth of field of the 3D display image. Based on the technical principle of the present invention, it can be applied to any type of 3D display device and obtain the effect of increasing the depth of field.

[0003] At the same time, the multifunctional glasses of the present invention can also be used for myopia correction in children. Existing myopia correction glasses for children often use physical pinholes to form an aperture and assist in correcting vision. Because the position of the physical pinhole cannot overlap with the pupil of the human eye, it has the function of a field of view aperture in addition to the aperture aperture. The field of view aperture has a limiting effect on the range that the human eye can see, resulting in a smaller field of view of existing myopia correction glasses for children. The virtual aperture aperture formed by the present invention can overlap with the pupil of the human eye and allow light to enter in any direction. Therefore, compared with traditional myopia correction for children, it has a technical advantage of a larger field of view. Summary of the invention

[0004] In order to solve the problem that the traditional 3D display has a limited depth of field and viewers are prone to visual fatigue, the present invention proposes a multifunctional pair of glasses. The multifunctional glasses proposed by the present invention can also be used for children's myopia correction, and compared with traditional children's myopia correction glasses, it has the beneficial effect of a larger field of view.

[0005] The multifunctional glasses include lenses.

[0006] The lens includes a first aperture piece, a second aperture piece and a third aperture piece.

[0007] The first aperture piece, the second aperture piece and the third aperture piece are sequentially arranged at intervals from front to back.

[0008] The first aperture plate, the second aperture plate and the third aperture plate all include a small hole array.

[0009] The light is incident on the human eye through the first aperture array, the second aperture array and the third aperture array in sequence.

[0010] The first aperture plate, the second aperture plate and the third aperture plate constitute an optical combination, and the optical combination forms a virtual aperture stop array.

[0011] One of the virtual aperture stops in the virtual aperture stop array is located near the pupil of the human eye.

[0012] The diameter of the virtual aperture stop is smaller than the pupil diameter of the human eye, thus limiting the imaging beam.

[0013] Preferably, the virtual aperture stop pitch is greater than or equal to the pupil diameter of the human eye to avoid ghosting.

[0014] Preferably, assuming that the diameter of the first aperture is W1, the pitch of the first aperture is P1, the pitch of the second aperture is P2, the diameter of the third aperture is W2, the distance from the first aperture to the second aperture is D1, the distance from the first aperture to the third aperture is D2, the distance from the first aperture to the virtual aperture is D3, the diameter of the virtual aperture on the virtual aperture is W3, the pitch of the virtual aperture is P3, and the pupil diameter of the human eye is K, the above relationship should satisfy: ; ; ; ; W3 <K。

[0015] It should be noted that the above relationship is a sufficient but not necessary condition for realizing the technical principle of the present invention, and the designer can adjust the above parameters to achieve similar effects.

[0016] Furthermore, the present invention uses the first aperture piece, the second aperture piece and the third aperture piece to form an optical combination, which can effectively reduce the blind area. Assume that the blind area is located in front of the first aperture piece, and its front-to-back length is D4, and D4 satisfies: , where W4 is the spacing between the small holes of the first aperture plate, and W4=P1-W1.

[0017] That is, objects that are more than D4 away from the first aperture plate can be fully seen.

[0018] Furthermore, because all the small holes on the first aperture plate in the present invention can form a virtual aperture stop at the same position through the second aperture plate and the third aperture plate, the present invention has a larger viewing angle than the traditional mode.

[0019] Optionally, the second aperture plate is removed and the number of apertures in the first aperture plate and the third aperture plate is reduced to form a low-cost solution, but its blind area is larger.

[0020] Optionally, the third aperture plate is removed and the number of small holes in the first aperture plate and the second aperture plate is reduced to form a low-cost solution, but its blind area is larger.

[0021] Optionally, the small hole on any aperture piece is replaced by a slit, and the slit width parameter is consistent with the small hole diameter parameter.

[0022] Optionally, two adjacent small holes on any aperture plate are respectively covered with polarizing plates with orthogonal polarization directions, thereby further increasing and reducing the blind area.

[0023] In summary, the present invention can form a virtual aperture sheet at the position of the pupil of the human eye, and the virtual aperture sheet has a virtual aperture aperture array; the diameter of each virtual aperture aperture in the virtual aperture aperture array is smaller than the diameter of the pupil of the human eye, thereby limiting the imaging light beam, so it can increase the depth of field of the image display, so that the human eye can still see the object clearly when it is not correctly focused. Based on the above principle, the present invention can achieve the effect of increasing the depth of field in a 3D display device; at the same time, it can also be used as children's myopia correction glasses, and compared with traditional pinhole glasses, the present invention has a technical advantage of a larger viewing angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 It is a schematic diagram of the optical structure of the present invention.

[0026] Figure 3 Schematic diagram of the blind area of ​​the field of view of the present invention.

[0027] Figure 4 It is a schematic diagram of the optical structure in which the second aperture piece is removed in the alternative solution of the present invention.

[0028] Icons: 100 - lens; 110 - first aperture piece; 120 - second aperture piece; 130 - third aperture piece; 200 - virtual aperture aperture array; 210 - virtual aperture aperture; 300 - blind area; 400 - crosstalk light.

[0029] It should be understood that the above drawings are only schematic and are not drawn to scale. DETAILED DESCRIPTION

[0030] Figure 1 A pair of multifunctional glasses provided in this embodiment.

[0031] The multifunctional glasses include a lens 100 .

[0032] The lens 100 includes a first aperture plate 110 , a second aperture plate 120 and a third aperture plate 130 .

[0033] The first aperture piece 110 , the second aperture piece 120 , and the third aperture piece 130 are sequentially arranged at intervals from front to back.

[0034] The first aperture plate 110 , the second aperture plate 120 , and the third aperture plate 130 all include a small hole array.

[0035] The light is incident on the human eye through the pinhole array of the first aperture plate 110 , the pinhole array of the second aperture plate 120 , and the pinhole array of the third aperture plate 130 in sequence.

[0036] Please refer to Figure 2 The first aperture plate 110 , the second aperture plate 120 and the third aperture plate 130 constitute an optical combination, and the optical combination forms a virtual aperture aperture array 200 .

[0037] One of the virtual aperture stops 210 in the virtual aperture stop array 200 is located near the pupil of the human eye.

[0038] The diameter of the virtual aperture stop 210 is smaller than the pupil diameter of the human eye, thereby limiting the imaging light beam.

[0039] The pitch of the virtual aperture stop 210 is equal to the pupil diameter of the human eye, thereby avoiding double images.

[0040] Assuming that the diameter W1 of the small hole of the first aperture piece 110 is 0.25 mm, the pitch P1 of the small hole of the first aperture piece 110 is 1 mm, the pitch P2 of the second aperture piece 120 is 0.8 mm, the diameter W2 of the small hole of the third aperture piece 130 is 0.125 mm, the distance D1 from the first aperture piece 110 to the second aperture piece 120 is 2 mm, the distance D2 from the first aperture piece 110 to the third aperture piece 130 is 3 mm, the distance D3 from the first aperture piece 110 to the virtual aperture piece is 10 mm, the diameter W3 of the virtual aperture stop 210 on the virtual aperture piece is 1 mm, the pitch P3 of the virtual aperture stop 210 is 4 mm, and the pupil diameter of the human eye is K=4 mm, the above relationship satisfies: ; ; ; ; W3 <K; P3=K.

[0041] Please refer to Figure 3 Furthermore, the present invention adopts the first aperture piece 110, the second aperture piece 120 and the third aperture piece 130 to form an optical combination, which can effectively reduce the blind area. The blind area 300 is located in front of the first aperture piece 110, and its front-to-back length D4 is 30 mm, and D4 satisfies: , where W4=0.75 mm is the aperture spacing of the first aperture plate 110, and W4=P1-W1.

[0042] That is, objects that are more than 30 mm away from the first aperture plate 110 can be completely seen.

[0043] Furthermore, since all the small holes on the first aperture plate 110 in the present invention can form a virtual aperture stop 210 at the same position through the second aperture plate 120 and the third aperture plate 130, the present invention has a larger viewing angle than the traditional mode.

[0044] Figure 4 This is another embodiment of the present invention. In this embodiment, the second aperture plate 120 is removed, and the number of small holes in the first aperture plate 110 and the third aperture plate 130 is reduced to form a low-cost solution, but the blind area is larger.

[0045] Please compare Figure 4 and Figure 2 In this embodiment, the number of small holes in the first aperture plate 110 and the third aperture plate 130 is reduced by half, so as to form a Figure 2 The consistent virtual aperture stop array 200. However, since the number of small holes is reduced in this embodiment, it necessarily has a larger visual blind spot.

[0046] For further information, please refer to Figure 4 If these small holes are retained, the crosstalk light 400 will irradiate the non-aperture area of ​​the virtual aperture stop array 200, thereby destroying the aperture stop.

[0047] In summary, the present invention can form a virtual aperture sheet at the position of the pupil of the human eye, and the virtual aperture sheet has a virtual aperture aperture array 200; the diameter of each virtual aperture aperture 210 in the virtual aperture aperture array 200 is smaller than the diameter of the pupil of the human eye, thereby limiting the imaging light beam, so it can increase the depth of field of the image display, so that the human eye can still see the object clearly when it is not correctly focused. Based on the above principle, the present invention can achieve the effect of increasing the depth of field in a 3D display device; at the same time, it can also be used as children's myopia correction glasses, and compared with traditional pinhole glasses, the present invention has a technical advantage of a larger viewing angle.

Claims

1. A multifunctional pair of glasses, characterized in that: The multifunctional glasses include lenses; The lens comprises a first aperture piece, a second aperture piece and a third aperture piece; The first aperture piece, the second aperture piece and the third aperture piece are sequentially spaced from front to back; The first aperture piece, the second aperture piece and the third aperture piece all include a small hole array; The light is incident on the human eye through the first aperture array, the second aperture array and the third aperture array in sequence; The first aperture piece, the second aperture piece and the third aperture piece constitute an optical combination, and the optical combination forms a virtual aperture aperture array; One of the virtual aperture stops in the virtual aperture stop array is located near the pupil of a human eye; The diameter of the virtual aperture stop is smaller than the pupil diameter of the human eye, thus limiting the imaging beam.

2. The multifunctional glasses according to claim 1, characterized in that: The virtual aperture stop pitch is greater than or equal to the pupil diameter of the human eye, thereby avoiding ghosting.

3. The multifunctional glasses according to claim 1, characterized in that: Assume that the diameter of the first aperture is W1, the pitch of the first aperture is P1, the pitch of the second aperture is P2, the diameter of the third aperture is W2, the distance from the first aperture to the second aperture is D1, the distance from the first aperture to the third aperture is D2, the distance from the first aperture to the virtual aperture is D3, the diameter of the virtual aperture on the virtual aperture is W3, the pitch of the virtual aperture is P3, and the pupil diameter of the human eye is K. The above relationship should satisfy: ； ； ； ； W3 <K。 4. The multifunctional glasses according to claim 3, characterized in that: The first aperture piece, the second aperture piece and the third aperture piece form an optical combination having a blind area; Assume that the blind area is located in front of the first aperture piece, and its front-to-back length is D4, and D4 satisfies: , where W4 is the spacing between the small holes of the first aperture plate, and W4=P1-W1.

5. The multifunctional glasses according to claim 1, characterized in that: The second aperture plate is removed, and the number of apertures in the first aperture plate and the third aperture plate is reduced to form a low-cost solution.

6. The multifunctional glasses according to claim 1, characterized in that: The third aperture plate is removed and the number of apertures in the first aperture plate and the second aperture plate is reduced to form a low-cost solution.

7. The multifunctional glasses according to claim 1, characterized in that: In the first aperture piece, the second aperture piece and the third aperture piece, the small hole on any aperture piece is replaced by a slit, and the slit width parameter is consistent with the small hole diameter parameter.

8. The multifunctional glasses according to claim 1, characterized in that: Two adjacent small holes on any aperture plate are respectively covered with polarizing plates with orthogonal polarization directions.

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