Composite straight dihedral reflector array flat lens and large viewing angle medium-free air suspension display device

Abstract

This invention provides a composite right dihedral reflector array flat panel lens and a wide-viewing-angle, medium-free air-floating display device. The composite right dihedral reflector array flat panel lens includes a first light guide and a second light guide. The first light guide includes a first transparent right quadrangular prism and a quarter-wave plate, with the quarter-wave plate attached to the first transparent right quadrangular prism. The first light guide is composed of multiple rows and columns of first transparent right quadrangular prisms obliquely combined. The second light guide includes a second transparent right quadrangular prism and a second reflective film, and is composed of multiple rows and columns of second transparent right quadrangular prisms obliquely combined. The beneficial effects of this invention are: it effectively solves the defects and shortcomings of current floating displays, making it feasible to apply medium-free air-floating display devices to the automotive industry; its relatively low manufacturing cost allows the technology to also be applied to the consumer electronics field; it has a strong air-floating display effect, bringing significant economic and social benefits.

Description

Technical Field

[0001] This invention relates to the field of medium-free levitation display technology, and in particular to a composite dihedral reflector array flat lens for a large-viewing-angle medium-free air levitation display device and a large-viewing-angle medium-free air levitation display device. Background Technology

[0002] like Figure 1 As shown, when a traditional right dihedral reflector array plate is used, due to the limitations of the right dihedral reflector principle, with the straight line extending forward through the current light-emitting point as the optical axis, when the object-side light is incident on one side of the right dihedral reflector at a 45° off-axis direction, since that side is arranged at a 45° off-axis angle, the object-side light is perpendicular to that side of the right dihedral reflector and is no longer reflected to the other side. The function of the right dihedral reflector is ineffective. Therefore, the viewing angle of a medium-free suspended display currently using an equivalent right dihedral reflector array cannot exceed ±45°.

[0003] Current technology, due to its single right-angled dihedral array structure, prevents further reflection and propagation of light when the angle of incident light exceeds 45°, as the light becomes parallel to the reflecting surface in the first reflection channel. Therefore, the visible angle cannot exceed 45°, limiting the use of field images. Summary of the Invention

[0004] To address the limitation that the viewing angle of a single-mode right dihedral reflector array structure does not exceed ±45°, this invention provides a composite right dihedral reflector array flat lens, comprising a first light guide and a second light guide.

[0005] The first light guide includes a first transparent straight quadrangular prism and a quarter-wave plate. The first transparent straight quadrangular prism is attached with the quarter-wave plate. The first light guide is composed of multiple rows and columns of first transparent straight quadrangular prisms arranged obliquely together. A first reflective film is embedded between the sides of two adjacent columns of first transparent straight quadrangular prisms, and there is a gap between the sides of two adjacent rows of first transparent straight quadrangular prisms.

[0006] The second light guide includes a second transparent straight quadrangular prism and a second reflective film. The second transparent straight quadrangular prism is attached with the second reflective film. The second light guide is composed of multiple rows and columns of second transparent straight quadrangular prisms arranged obliquely together. A third reflective film is embedded between the sides of two adjacent rows of second transparent straight quadrangular prisms, and there is a gap between the sides of two adjacent rows of second transparent straight quadrangular prisms.

[0007] The direction of the first reflective film embedded between the two adjacent rows of the first transparent straight quadrangular prisms of the first light guide is perpendicular to the direction of the third reflective film embedded between the two adjacent rows of the second transparent straight quadrangular prisms of the second light guide. The part where the upper and lower crosses each other constitutes the first micro corner reflector.

[0008] The first light guide belongs to two sides arranged in rows and parallel to the direction of the row arrangement, and the second light guide belongs to two sides arranged in columns and parallel to the direction of the column arrangement. The directions of the two sides are perpendicular to each other, and the cross-shaped parts at the top and bottom constitute the second micro corner reflector.

[0009] As a further improvement of the present invention, the upper surface of the first light guide and the lower surface of the second light guide are respectively covered with transparent material.

[0010] As a further improvement of the present invention, the transparent material is transparent glass or other transparent optical material.

[0011] As a further improvement of the present invention, the first transparent straight quadrangular prism is attached with the 1 / 4 wave plate on both sides.

[0012] As a further improvement of the present invention, the second reflective film is attached to the same side of the upper and lower sides of the second transparent straight quadrangular prism.

[0013] As a further improvement of the present invention, the second light guide is composed of multiple rows and columns of obliquely arranged second transparent straight quadrangular prisms, and the side of the second transparent straight quadrangular prisms arranged in columns and parallel to the column arrangement direction is embedded with a polarizing reflective film that can transmit or reflect linearly polarized light in different directions.

[0014] As a further improvement of the present invention, the first transparent right square prism and / or the second transparent right square prism are made of glass.

[0015] As a further improvement of the present invention, the top and bottom surfaces of the first transparent straight quadrangular prism are non-rectangular parallelograms, and the four sides of the first transparent straight quadrangular prism belong to two sides arranged in rows and two sides arranged in columns, respectively. The two sides that belong to the columns and are parallel to the column direction are respectively attached with the 1 / 4 wave plate.

[0016] As a further improvement of the present invention, the second light guide is composed of multiple rows and columns of diagonally arranged second transparent straight quadrangular prisms. The upper and lower bases of the second transparent straight quadrangular prisms are non-rectangular parallelograms. The four sides of the second transparent straight quadrangular prisms belong to two sides arranged in rows and two sides arranged in columns, respectively. The side that belongs to the column arrangement and is parallel to the column arrangement direction and the side between the two adjacent second transparent straight quadrangular prisms are embedded with a polarizing reflective film that can transmit or reflect linearly polarized light in different directions.

[0017] The present invention also provides a wide-viewing-angle, medium-free, air-suspended display device, which includes the composite dihedral reflector array flat lens described in the present invention.

[0018] The beneficial effects of this invention are: the composite dihedral reflector array flat lens and the wide-viewing-angle medium-free floating display device proposed in this invention effectively solve the defects and shortcomings of current floating displays, making it feasible to apply medium-free floating display devices to the automotive industry. The relatively low manufacturing cost also allows this technology to be applied to the consumer electronics field, with a strong floating display effect, bringing significant economic and social benefits. Attached Figure Description

[0019] Figure 1 This is a diagram of a traditional flat panel structure for a dihedral reflector array;

[0020] Figure 2 This is a schematic diagram of the structure of the first transparent right square prism;

[0021] Figure 3 This is a schematic diagram of the first light guide component;

[0022] Figure 4 This is a schematic diagram of the structure of the second transparent right square prism;

[0023] Figure 5 This is a schematic diagram of the second light guide component;

[0024] Figure 6 This is a schematic diagram of a composite dihedral reflector array flat lens structure;

[0025] Figure 7 This is a schematic diagram of the imaging principle. Detailed Implementation

[0026] This invention discloses a composite dihedral reflector array flat plate lens, comprising a first light guide 10 and a second light guide 20. The first light guide 10 includes a first transparent straight quadrangular prism 11 and a quarter-wave plate 12, such as... Figure 2 As shown, the first transparent straight quadrangular prism 11 is attached with the quarter wave plate 12, preferably, the quarter wave plate 12 is attached to both sides of the first transparent straight quadrangular prism 11.

[0027] like Figure 3 As shown, the first light guide 10 is composed of multiple rows and columns of first transparent straight quadrangular prisms 11 (with quarter-wave plates 12 attached to both sides) arranged obliquely together. A first reflective film is embedded between the sides of two adjacent columns of first transparent straight quadrangular prisms 11, and the gap between the sides of two adjacent rows of first transparent straight quadrangular prisms 11 is air.

[0028] The second light guide 20 includes a second transparent straight quadrangular prism 21 and a second reflective film 22, such as Figure 4As shown, the second transparent straight quadrangular prism 21 is covered with a second reflective film 22. Preferably, the second reflective film 22 is covered on the same side of the upper and lower sides of the second transparent straight quadrangular prism 21.

[0029] like Figure 5 As shown, the second light guide 20 is composed of multiple rows and columns of second transparent straight quadrangular prisms 21 arranged obliquely. The side of the second transparent straight quadrangular prism 21 arranged in columns and parallel to the column arrangement direction is embedded with a polarizing reflective film that can transmit or reflect linearly polarized light in different directions. A third reflective film is embedded between the side of two adjacent rows of second transparent straight quadrangular prisms 21. The gap between the side of two adjacent rows of second transparent straight quadrangular prisms 21 is air.

[0030] The direction of the first reflective film embedded between the two adjacent rows of the first transparent straight quadrangular prisms 11 of the first light guide 10 and the direction of the third reflective film embedded between the two adjacent rows of the second transparent straight quadrangular prisms 21 of the second light guide 20 are perpendicular to each other, and the part where the upper and lower crosses form the first micro corner reflector.

[0031] The first light guide 10 belongs to two sides arranged in rows and parallel to the direction of the row arrangement, and the second light guide 20 belongs to two sides arranged in columns and parallel to the direction of the column arrangement. The directions of the two sides are perpendicular to each other, and the cross-shaped part at the top and bottom constitutes the second micro corner reflector.

[0032] The upper surface of the first light guide 10 and the lower surface of the second light guide 20 are respectively covered with transparent material. The transparent material can be transparent glass or other transparent optical material, which serves as the structural support material for the first light guide 10 and the second light guide 20, and also protects the first light guide 10 and the second light guide 20.

[0033] like Figure 6 As shown, the present invention comprises a composite dihedral reflector array flat plate lens consisting of a first light guide 10 and a second light guide 20 with optical microstructures.

[0034] The first transparent straight quadrangular prism 11 and the second transparent straight quadrangular prism 21 are preferably made of glass material, but can also be made of transparent optical transparent materials such as CMMA, PC, and COC. The reason for preferring glass material is that glass material is stable, does not easily shrink or deform, and ensures the stability of the optical structure.

[0035] The top and bottom surfaces of the first transparent straight quadrangular prism 11 are non-rectangular parallelograms. The four sides of the first transparent straight quadrangular prism 11 belong to two sides arranged in rows and two sides arranged in columns, respectively. The two sides that belong to the column arrangement and are parallel to the column arrangement direction are respectively attached with the 1 / 4 wave plate 12.

[0036] The second light guide 20 is composed of multiple rows and columns of diagonally arranged second transparent straight quadrangular prisms 21. The top and bottom surfaces of the second transparent straight quadrangular prisms 21 are non-rectangular parallelograms. The four sides of the second transparent straight quadrangular prisms 21 belong to two sides arranged in rows and two sides arranged in columns, respectively. The side that belongs to the column arrangement and is parallel to the column arrangement direction and the side between the two adjacent second transparent straight quadrangular prisms 21 are embedded with a polarizing reflective film that can transmit or reflect linearly polarized light in different directions.

[0037] The composite dihedral reflector array flat lens constitutes the core optical imaging component of the wide-viewing-angle, medium-free, air-suspended display device.

[0038] In this invention, due to the presence of the second micro corner reflector, since the object-side light passes through one of the 11 rows of the first transparent right square prism in the first light guide 10, the light travels from the optically denser medium to the optically less dense medium. When the first micro corner reflector fails, the light undergoes total internal reflection on the 11 rows of the first transparent right square prism, and the second micro corner reflector begins to function.

[0039] Inside the first light guide 10, two parallel first reflective films are arranged with a fixed gap between them. This gap forms a light transmission channel between the two parallel first reflective surfaces. When the imaging light beam emitted from the object side enters the gap between the two first reflective films, it can undergo one or more reflections and exit from the other end of the gap, entering a miniature corner reflector formed by the cross intersection of the upper and lower first reflective films. The projection of this light beam on the xy-plane undergoes a 180° rotation, while in the longitudinal z-axis direction, the propagation direction of the light beam continues forward along its original direction. It is then coupled into a reflection channel within another set of multiple parallel, vertically elongated reflective sheets with a certain gap. After one or more reflections, some or all of the light rays are reflected into the second light guide 20 of the composite dihedral corner reflector array plate lens, and continue to propagate forward near the mirror image position of the object-side emitting point. Light rays from other directions emitted by the same object-side emitting point, reflected from corner reflectors at different positions in the corner reflector array, converge again at the same location in the air on the other side of the composite dihedral corner reflector array plate lens. Thus, an image emitting point is formed at the same location in the air on the other side of the composite dihedral corner reflector array plate lens. Similarly, light rays from other emitting points of the object-side beam, emitting in different directions, converge at another identical location in the air on the other side of the composite dihedral corner reflector array plate lens after the same process, thereby forming an airborne image, such as... Figure 7As shown.

[0040] Using this composite dihedral reflector array flat panel lens can effectively solve the problem that the viewing angle of current non-medium suspended displays cannot exceed ±45°, providing a wider viewing angle and a better viewing experience.

[0041] This invention simplifies the processing technology by combining multiple thin sheets with reflective surfaces on both sides. The thin sheets are parallel to each other and have a certain gap. A second dihedral reflector array made of glass is filled in between. The upper and lower sets of thin sheets are bonded together to process the key optical material of a wide-viewing-angle, medium-free air-suspended display device, which accelerates the promotion and application of this new technology.

[0042] This invention uses a highly reflective metal strip surface to reflect and converge light for imaging, avoiding multiple refractions of light, thus achieving higher reflection efficiency and improving the image brightness of media-free levitation display products.

[0043] In summary, the composite dihedral reflector array flat lens and wide-viewing-angle medium-free floating display device proposed in this invention effectively solves the defects and shortcomings of current floating displays, making it feasible to apply medium-free floating display devices to the automotive industry. The relatively low manufacturing cost also allows this technology to be applied to the consumer electronics field, with a strong floating display effect, bringing significant economic and social benefits.

[0044] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A composite dihedral reflector array flat plate lens, characterized in that: Including a first light guide (10) and a second light guide (20), The first light guide (10) includes a first transparent straight quadrangular prism (11) and a quarter wave plate (12). The first transparent straight quadrangular prism (11) is attached with the quarter wave plate (12). The first light guide (10) is composed of multiple rows and columns of first transparent straight quadrangular prisms (11) arranged obliquely. A first reflective film is embedded between the sides of two adjacent columns of first transparent straight quadrangular prisms (11). There is a gap between the sides of two adjacent rows of first transparent straight quadrangular prisms (11). The second light guide (20) includes a second transparent straight quadrangular prism (21) and a second reflective film (22). The second transparent straight quadrangular prism (21) is attached with the second reflective film (22). The second light guide (20) is composed of multiple rows and columns of second transparent straight quadrangular prisms (21) arranged obliquely. A third reflective film is embedded between the sides of two adjacent rows of second transparent straight quadrangular prisms (21). There is a gap between the sides of two adjacent rows of second transparent straight quadrangular prisms (21). The direction of the first reflective film embedded between the two adjacent rows of the first transparent straight quadrangular prisms (11) of the first light guide (10) and the direction of the third reflective film embedded between the two adjacent rows of the second transparent straight quadrangular prisms (21) of the second light guide (20) are perpendicular to each other. The part where the upper and lower crosses form the first micro corner reflector. The first light guide (10) belongs to the two sides arranged in rows and parallel to the direction of the row arrangement, and the second light guide (20) belongs to the two sides arranged in columns and parallel to the direction of the column arrangement. The directions of the two sides are perpendicular to each other, and the cross-shaped part at the top and bottom constitutes the second micro corner reflector.

2. The composite dihedral reflector array flat lens according to claim 1, characterized in that: The upper surface of the first light guide (10) and the lower surface of the second light guide (20) are respectively covered with transparent material.

3. The composite dihedral reflector array flat lens according to claim 2, characterized in that: The transparent material is transparent glass or other transparent optical materials.

4. The composite dihedral reflector array flat lens according to claim 1, characterized in that: The first transparent straight quadrangular prism (11) has quarter-wave plates (12) attached to both sides.

5. The composite dihedral reflector array flat lens according to claim 1, characterized in that: The second reflective film (22) is attached to the same side of the upper and lower sides of the second transparent straight quadrangular prism (21).

6. The composite dihedral reflector array flat lens according to claim 1, characterized in that: The second light guide (20) is composed of multiple rows and columns of second transparent straight quadrangular prisms (21) arranged obliquely. The side of the second transparent straight quadrangular prism (21) arranged in columns and parallel to the column arrangement direction is embedded with a polarizing reflective film that can transmit or reflect linearly polarized light in different directions.

7. The composite dihedral reflector array flat lens according to claim 1, characterized in that: The first transparent right square prism (11) and / or the second transparent right square prism (21) are made of glass.

8. The composite dihedral reflector array flat lens according to claim 1, characterized in that: The top and bottom surfaces of the first transparent straight quadrangular prism (11) are non-rectangular parallelograms. The four sides of the first transparent straight quadrangular prism (11) belong to the two sides arranged in rows and the two sides arranged in columns, respectively. The two sides that belong to the columns and are parallel to the column direction are respectively attached with the 1 / 4 wave plate (12).

9. The composite dihedral reflector array flat lens according to claim 1, characterized in that: The second light guide (20) is composed of multiple rows and columns of diagonally arranged second transparent straight quadrangular prisms (21). The top and bottom surfaces of the second transparent straight quadrangular prisms (21) are non-rectangular parallelograms. The four sides of the second transparent straight quadrangular prisms (21) belong to two sides arranged in rows and two sides arranged in columns. The side that belongs to the column arrangement and is parallel to the column arrangement direction is embedded with a polarizing reflective film that can transmit or reflect linearly polarized light in different directions between the side that belongs to the column arrangement and the side that is adjacent to the two second transparent straight quadrangular prisms (21) on the left and right.

10. A wide-viewing-angle, medium-free, air-suspended display device, characterized in that: The wide-viewing-angle, medium-free, air-suspended display device includes the composite dihedral reflector array flat lens as described in any one of claims 1 to 9.

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