A yellow light band privacy protection device based on the principle of angle selection

Abstract

The present invention discloses a yellow light band privacy protection device based on the principle of angle selection, which includes an antiglare hard coating, a PC layer, a highly symmetric quasi-periodic privacy protection structure layer, an adhesive layer, and a PET layer. The antiglare hard coating, the PC layer, the highly symmetric quasi-periodic privacy protection structure layer, the adhesive layer, and the PET layer are tightly stacked in contact with each other from top to bottom in sequence. The highly symmetric quasi-periodic privacy protection structure layer includes a main structure layer and an antireflection structure coating. The main structure layer includes sequentially arranged media SiO2 (silicon dioxide) and media TiO2 (titanium dioxide). The antireflection structure coating includes sequentially arranged media soda-lime glass and media diopside. The present invention is designed based on the principle of angle selection, uses an antireflection structure coating to suppress the reflectivity, improves the rectangularity coefficient of the angle selection characteristic, and thus improves the measurement accuracy. At the same time, a unique design of an extremely small wave vector dispersion region for angle filtering is adopted to achieve the selection of privacy angles.

Description

Technical Field

[0001] The present invention relates to a yellow light band privacy protection device based on the principle of angle selection, belonging to the technical field of information protection. Background Art

[0002] With the rapid development of information technology, people's awareness of privacy protection is getting stronger and stronger. An anti-peeping film is an optical film that uses the polarization characteristics of light to control the propagation direction of light, which is used to transmit optical information in a specified direction and restrict observers in other directions from receiving this information, thereby playing a role in privacy protection. The anti-peeping film can be placed on the surface of a display, a picture or other information carriers. In the direction perpendicular to the anti-peeping film, the background light can pass through the anti-peeping film and the observer can see this information. As the tilt angle increases, the visibility of the information gradually decreases. After the angle between the tilt angle and the plane of the anti-peeping film reaches a certain value, the information is completely blocked, thus preventing observers in other directions from obtaining the information and playing a role in privacy protection.

[0003] Traditional anti-peeping films adopt the globally unique ultra-fine louver (MICROLOUVER) optical patent technology, enabling the data displayed on the screen to be read only by the user from the front. The visible area is 60 degrees, and anyone watching from the sides can only see a black screen. It effectively protects business secrets and personal privacy, and users can use electronic products such as computers and mobile phones at will in the office, during travel, in public places and any environment.

[0004] It can be seen that the prior art only studies the anti-peeping of natural light, but does not provide an anti-peeping device based on a single yellow light band. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a yellow light band privacy protection device based on the principle of angle selection. This privacy protection device is designed based on the principle of angle selection, adopts an anti-reflection structure coating to suppress the reflectivity, improves the rectangular coefficient of the angle selection characteristic, and thus improves the measurement accuracy; at the same time, it adopts a unique design of an extremely small wave vector dispersion region for angle filtering to achieve the selection of privacy angles.

[0006] To achieve the above object, the present invention is implemented by the following technical solutions:

[0007] In a first aspect, the present invention provides a yellow light band privacy protection device based on the principle of angle selection, which includes an anti-glare hard coating, a PC layer, a highly symmetric quasi-periodic anti-peeping structure layer, an adhesive layer, and a PET layer. The anti-glare hard coating, the PC layer, the highly symmetric quasi-periodic anti-peeping structure layer, the adhesive layer, and the PET layer are closely stacked in contact with each other from top to bottom in sequence. The highly symmetric quasi-periodic anti-peeping structure layer includes a main structure layer and an anti-reflection structure coating. The main structure layer includes sequentially arranged dielectric SiO2 (silicon dioxide) and dielectric TiO2 (titanium dioxide). The anti-reflection structure coating includes sequentially arranged dielectric soda-lime glass and dielectric diopside.

[0008] Further, the arrangement order of the dielectrics in the highly symmetric quasi-periodic anti-peeping structure layer is: soda-lime glass, (diopside soda-lime glass) 11 、diopside, soda-lime glass, TiO2, (SiO2TiO2) 12 、SiO2, TiO2, soda-lime glass, (diopside soda-lime glass) 11 、diopside, soda-lime glass, where the components in parentheses are expressed as a group, and the subscript is the number of this group.

[0009] Further, the dielectric arrangement group TiO2, (SiO2TiO2) 12 、SiO2, TiO2 is the main structure of the highly symmetric quasi-periodic anti-peeping structure layer; the dielectric arrangement group soda-lime glass, (diopside soda-lime glass) 11 、diopside, soda-lime glass is the anti-reflection structure coating of the highly symmetric quasi-periodic anti-peeping structure layer, where the components in parentheses are expressed as a group, and the subscript is the number of this group.

[0010] Further, the first layer TiO2 and the last layer TiO2 of the main structure of the highly symmetric quasi-periodic anti-peeping structure layer are half of the thickness of the other TiO2 in this structure.

[0011] Further, the first layer soda-lime glass and the last layer soda-lime glass of the anti-reflection structure coating of the highly symmetric quasi-periodic anti-peeping structure layer are half of the thickness of the other soda-lime glass in this structure.

[0012] Further, the dielectric soda-lime glass is a special soda-lime glass with a refractive index of 1.5.

[0013] Further, the dielectric diopside is a special diopside with a refractive index of 1.68.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0015] (1) The anti-peeping structure of the present invention coats anti-reflection layers at both ends of the main body structure, obtaining an angle selection function with a high rectangularity coefficient, making the angle selection more accurate.

[0016] (2) The present invention realizes the angle selection in the yellow light band and achieves the effect of privacy protection by using a unique design of an extremely small wave vector dispersion region for angle filtering. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall system structure of the yellow light band privacy protection device according to an embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of the unit structure of the highly symmetric quasi-periodic anti-peeping structure layer of the yellow light band privacy protection device according to an embodiment of the present invention;

[0019] Figure 3 It is a front view of the cascaded refractive index sensor according to an embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of the relationship between the refractive indices of the TM wave and the TE wave and the incident angle change when the angle transformation range of the yellow light band privacy protection device according to an embodiment of the present invention is -90° - 90°;

[0021] Figure 5 It is a schematic diagram of the overall system structure of the yellow light band privacy protection device according to an embodiment of the present invention;

[0022] In the figure: 1, anti-glare hard coating; 2, PC layer; 3, highly symmetric quasi-periodic anti-peeping structure layer; 4, adhesive layer; 5, PET layer. Detailed Embodiments

[0023] The present invention will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and cannot be used to limit the protection scope of the present invention.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In addition, terms such as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0026] Embodiment 1

[0027] This embodiment introduces a yellow light band privacy protection device based on the principle of angle selection, which improves the accuracy of angle selection by using an anti-reflection structure coating and a design of an extremely small wave vector dispersion region for angle filtering.

[0028] The overall system structure schematic diagram of the sensor is as Figure 1 and Figure 5 shown, where the anti-glare hard coating 1, PC layer 2, highly symmetric quasi-periodic privacy protection structure layer 3, adhesive layer 4, and PET layer 5 are stacked downward in sequence.

[0029] The highly symmetric quasi-periodic privacy protection structure layer 1, as Figure 2 shown, the overall dielectric arrangement order is soda-lime glass, (diopside soda-lime glass) 11 , diopside, soda-lime glass, TiO2, (SiO2TiO2) 12 , SiO2, TiO2, soda-lime glass, (diopside soda-lime glass) 11, Diopside, soda-lime glass, consisting of antireflection structure coatings at both ends and a main structure in the middle, where N1 = 25, N2 = 27, and N3 = 25 represent the number of periods. The medium arrangement of the main structure is TiO2, (SiO2TiO2) 12 , SiO2, TiO2, and the medium arrangement of the antireflection structure coating is soda-lime glass, (diopside soda-lime glass) 11 , Diopside, soda-lime glass. The medium soda-lime glass is a special soda-lime glass with a refractive index of 1.5, and the medium diopside is a special diopside with a refractive index of 1.68. The components in parentheses represent a group, and the subscript is the number of this group.

[0030] The privacy angle selection function of this privacy protection device is realized by designing an extremely small wave vector dispersion region for angle filtering.

[0031] Figure 3 is the front view of this privacy device.

[0032] As Figure 4 shown, when the incident light is 510 THz, the transmittances of the TE wave and TM wave measured in the angle range of -30° - 30° are both above 0.85, and the transmittances of the TE wave and TM wave measured in the angle ranges of -90° - -30° and 30° - 90° basically reach 0; when the incident light is 530 THz, the transmittances of the TE wave and TM wave measured in the angle range of -47° - 47° are both above 0.85, and the transmittances of the TE wave and TM wave measured in the angle ranges of -90° - -47° and 47° - 90° basically reach 0;

[0033] After a specific design (a highly symmetric quasi-periodic privacy protection structure design), the present invention has the characteristics of simple structure, strong universality, wide application range, and generally economical materials.

[0034] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A yellow light band privacy protection device based on the angle selection principle, characterized in that It includes an antiglare hard coating, a PC layer, a highly symmetric quasi-periodic privacy structure layer, an adhesive layer, and a PET layer. The antiglare hard coating, PC layer, highly symmetric quasi-periodic privacy structure layer, adhesive layer, and PET layer are tightly stacked in contact with each other from top to bottom in sequence; the highly symmetric quasi-periodic privacy structure layer includes a main structure layer and an antireflection structure coating; the main structure layer includes sequentially arranged dielectric SiO2 (silicon dioxide) and dielectric TiO2 (titanium dioxide); the antireflection structure coating includes sequentially arranged dielectric soda-lime glass and dielectric diopside; The dielectric arrangement order of the highly symmetric quasi-periodic anti-peeping structure layer is: soda-lime glass, (diopside soda-lime glass) 11 , diopside, soda-lime glass, TiO2, (SiO2TiO2) 12 , SiO2, TiO2, soda-lime glass, (diopside soda-lime glass) 11 , diopside, soda-lime glass, where the components in parentheses are expressed as a group, and the subscript is the number of this group; The first layer of TiO2 and the last layer of TiO2 of the main structure of the highly symmetric quasi-periodic privacy structure layer are half the thickness of the other TiO2 in this structure; The first layer of soda-lime glass and the last layer of soda-lime glass of the antireflection structure coating of the highly symmetric quasi-periodic privacy structure layer are half the thickness of the other soda-lime glass in this structure; The dielectric soda-lime glass is a soda-lime glass with a refractive index of 1.5; The dielectric diopside is a special diopside with a refractive index of 1.

68.

2. The yellow light band privacy protection device based on the angle selection principle according to claim 1, characterized in that, Dielectric arrangement group TiO2, (SiO2TiO2) 12 , SiO2, and TiO2 are the main structures of the highly symmetric quasi-periodic anti-peeping structure layer; the dielectric arrangement group soda-lime glass, (diopside soda-lime glass) 11 , diopside, and soda-lime glass are the anti-reflection structure coatings of the highly symmetric quasi-periodic anti-peeping structure layer, where the components in parentheses are expressed as a group, and the subscript is the number of this group.

Images