TWM520676U - Anti-spy structure - Google Patents

Abstract

Disclosed herein is an anti-peeping structure for restricting view angle. The anti-peeping structure comprises a first optical film and a second optical film disposed on both sides of a transparent substrate. The first optical film has first regions with a first optical axis and second regions with a second optical axis; the second optical film has third regions with a third optical axis and fourth regions with a fourth optical axis. The first regions and the second regions, the third regions and the fourth regions are staggered arrangement; the first regions are corresponding to the third regions, and the second regions are corresponding to the fourth regions. The first axis is perpendicular to the second axis; the direction of the first axis and third axis, the direction of the second axis and fourth axis are the same. Therefore, the anti-peeping structure generates crosstalk effect between the regions of different optical axes, and restricts the view angle to achieve the effect of anti-peeping.

Description

Anti-spy structure

The present invention relates to a peep-proof structure, specifically a crosstalk which utilizes a crosstalk at the intersection of optical regions of different optical axes of an optical film, and which has a viewing angle limited to achieve a peep-proof structure.

With the development of display applications, the opportunities for users to use handheld devices such as mobile phones, tablet computers or notebook computers in public have increased dramatically, and the privacy of users has been more susceptible. The solution is to adopt a special anti-theft solution. The film is placed on the handheld device to avoid side-viewing.

As shown in FIG. 1a, the conventional anti-spy film 1 is generally used in a transparent substrate 2, and is filled with a light-shielding material having a depth and a thickness, such as a dyed resin or a metal material, to form a plurality of micro-louver structures 3 as a shading. The structure shields the large viewing angle light entering the privacy sheet 1 , but in order to make the privacy protection sheet 1 have a sufficient large viewing angle anti-spying effect, the micro louver structure 3 needs to have a large depth, so the thickness of the anti-spy film 1 must also be Correspondingly, the overall thickness of the handheld device is increased, which affects the convenience of the handheld device; please refer to FIG. 1b, which is a front view of the anti-spy film 1 because the micro-louver structure 3 still has a certain width to block The light will still affect the transparency of the front view, so the penetration of the conventional anti-spy film is usually low.

Therefore, there is a need for a peeping structure that does not require a large increase in the depth and width of the anti-spy film, so that the transparency of the handheld device is less affected during the front view, so as to improve the above. problem.

One aspect of the present invention is to provide a privacy-inhibiting structure for limiting viewing angle, comprising: a transparent substrate; a first optical film on one side of the transparent substrate and including a first region having a first optical axis And a second region having a second optical axis, the first region and the second region being staggered with each other, and the first optical axis is perpendicular to the second optical axis; and a second optical film located at the transparent The other side of the substrate opposite to the first optical film, and includes a third region having a third optical axis and a fourth region having a fourth optical axis, the third region and the fourth region being staggered with each other, and the The third optical axis is perpendicular to the fourth optical axis. The first area corresponds to the third area, and the area, the shape and the arrangement thereof are the same, and the directions of the first optical axis and the third optical axis are also the same; the second area corresponds to the fourth area, and The area, shape and arrangement are the same, and the directions of the second optical axis and the fourth optical axis are also the same.

In the anti-spy structure of the embodiment of the present invention, the one-side anti-peep angle θ satisfies θ=tan ⁻¹ (W/D), and W may be the first region, the second region, the third region or the fourth region. The width, D is the thickness of the transparent substrate.

In the anti-spy structure of another embodiment of the present invention, the first optical axis, the second optical axis, the third optical axis, and the fourth optical axis may be arranged in a continuous or discontinuous curve, a broken line, a straight line or combination.

In the anti-spy structure of another embodiment of the present invention, the first optical film and the second optical film may include a polarizer and a patterned retardation film.

In the anti-spy structure of another embodiment of the present invention, the retardation values of the patterned retardation film of the first optical film and the second optical film may both be ± λ /4.

In the anti-spy structure of another embodiment of the present invention, the retardation values of the patterned retardation film of the first optical film and the second optical film may both be ± λ /2.

In the anti-spy structure of another embodiment of the present invention, the transparent substrate has a thickness of from 1 mm to 100 mm.

In the anti-spy structure of another embodiment of the present invention, the first region and the second region of the first optical film may have a width of 0.25 mm to 60 mm.

In the anti-spy structure of another embodiment of the present invention, the third region and the fourth region of the second optical film may have a width of 0.25 mm to 60 mm.

The anti-spy structure of another embodiment of the present invention may further comprise at least one functional film layer disposed on one side of the anti-spy structure, the functional film layer being selected from the group consisting of a heat insulation film, an explosion-proof film, and a hard film. Coating, anti-fouling film, brightness enhancing film or a combination thereof.

1‧‧‧Anti-spy film

2, 5‧‧‧ transparent substrate

3‧‧‧Micro-louver structure

4‧‧‧Provisional structure

6‧‧‧First optical film

6a‧‧‧First area

6b‧‧‧Second area

7‧‧‧Second optical film

7c‧‧‧ third area

7d‧‧‧fourth area

A‧‧‧first optical axis

B‧‧‧second optical axis

C‧‧‧third optical axis

D‧‧‧fourth optical axis

Θ‧‧‧ anti-peep perspective

W‧‧‧Width

D‧‧‧thickness

The above and other objects, features, advantages and embodiments of the present invention can be more clearly understood. The description of the drawings is as follows: Figures 1a and 1b show a schematic diagram of a conventional anti-spy sheet; The figure is a schematic diagram of the anti-spy structure of an embodiment of the present invention; the 3a to 3c are diagrams showing the anti-spying effect of the anti-spy structure of the present embodiment in different viewing angles; A schematic diagram of the anti-peeping perspective of the anti-spy structure of an embodiment of the present invention.

In the following, a plurality of embodiments of the present invention will be disclosed in the drawings. For the sake of clarity, a number of practical details will be described in the following description. However, it should be understood that these practical details are not applied to limit the creation. That is to say, in the implementation part of this creation, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

Please refer to FIG. 2 for the anti-spy structure 4 applied to the three-dimensional display, which comprises: a transparent substrate 5; a first optical film 6 located on one side of the transparent substrate 5 and including a first region 6a of the optical axis a and a second region 6b having a second optical axis b, the first region 6a and the second region 6b being staggered with each other, and the first optical axis a and the second optical axis b is vertical; and a second optical film 7 is located on the other side of the transparent substrate 5 opposite to the first optical film 6, and includes a third region 7c having a third optical axis c and having a fourth optical axis The fourth region 7d of d is staggered with respect to the third region 7c and the fourth region 7d, and the third optical axis c is perpendicular to the fourth optical axis d. The first region 6a corresponds to the third region 7c, and has the same area, shape and arrangement, and the first optical axis a and the third optical axis c have the same direction; the second region 6b and the fourth region The area 7d corresponds to each other, and the area, shape and arrangement thereof are the same, and the directions of the second optical axis b and the fourth optical axis d are also the same.

Please refer to FIG. 3a to FIG. 3c, which are diagrams showing the anti-peeping effect of the anti-spy structure 4 according to an embodiment of the present invention; when viewed from the front view of FIG. 3a, the anti-spy structure 4 is in a transparent state. And the first region 6a of the first optical film 6 and the second region 6b have almost no boundary of a significant width, so that a uniform light-transmissive state with less brightness can be exhibited in the front view; The first region 6a of the first optical film 6 and the fourth region 7d of the second optical film 7 and the second portion of the first optical film 6 are shown as shown in FIGS. 3b and 3c. The overlapping area of the region 6b and the third region 7c of the second optical film 7 also increases, because the optical axis of the overlapping region is vertical, so that the boundary forms an opaque region due to crosstalk. Anti-peep effect in the large side view.

Referring to FIG. 4, in the anti-spy structure of the embodiment of the present invention, the anti-spy view angle θ of one side of the anti-spy structure satisfies θ=tan ⁻¹ (W/D), and the W is the first area 6 a , The width of the two regions 6b, the third region 7c or the fourth region 7d, and D is the thickness of the transparent substrate 5, and therefore, the desired anti-peep viewing angle can be adjusted by adjusting the width W and the thickness D.

In the anti-spy structure of another embodiment of the present invention, the first optical axis, the second optical axis, the third optical axis, and the fourth optical axis may be arranged in a continuous or discontinuous curve, a broken line, a straight line or combination.

In the anti-spy structure of another embodiment of the present invention, the first optical film and the second optical film comprise a polarizer and a patterned retardation film to form a plurality of regions of different optical axis directions.

In the anti-spy structure of another embodiment of the present invention, the retardation values of the patterned retardation film of the first optical film and the second optical film are both ± λ /4.

In the anti-spy structure of another embodiment of the present invention, the retardation values of the patterned retardation film of the first optical film and the second optical film are both ± λ /2.

In the anti-spy structure of another embodiment of the present invention, the thickness of the transparent substrate is between 1 mm and 100 mm.

In addition, since the glass substrates of the current window, window, etc. are generally transparent substrates, and all have a certain thickness, the anti-spy structure of the present invention can be disposed on a transparent base in addition to the first optical film and the second optical film. On both sides of the material, in addition to forming a peep prevention structure, the first optical film and the second optical film may be directly disposed on both sides of the glass substrate of the current window, window, etc., to directly form a window with a peep-proof structure. Windows, etc., without the need to add another transparent substrate.

In the anti-spy structure of another embodiment of the present invention, the first region and the second region of the first optical film have a width of between 0.25 mm and 60 mm.

In the anti-spy structure of another embodiment of the present invention, the third region and the fourth region of the second optical film have a width of 0.25 mm to 60 mm.

The anti-spy structure of another embodiment of the present invention preferably further comprises at least one functional film layer disposed on one side of the anti-spy structure, the functional film layer being selected from the group consisting of a heat insulating film and an explosion-proof film. Hard coating, anti-fouling film, brightness enhancing film or a combination thereof.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any person skilled in the art can make various changes and refinements without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

4‧‧‧Provisional structure

5‧‧‧Transparent substrate

6‧‧‧First optical film

6a‧‧‧First area

6b‧‧‧Second area

7‧‧‧Second optical film

7c‧‧‧ third area

7d‧‧‧fourth area

A‧‧‧first optical axis

B‧‧‧second optical axis

C‧‧‧third optical axis

D‧‧‧fourth optical axis

Claims (10)

An anti-spy structure for limiting viewing angle, comprising: a transparent substrate; a first optical film on one side of the transparent substrate, and comprising a first region having a first optical axis and having a second optical axis a second region, the first region and the second region are staggered with each other, and the first optical axis is perpendicular to the second optical axis; and a second optical film is disposed on the transparent substrate Opposite the other side of the first optical film, and including a third region having a third optical axis and a fourth region having a fourth optical axis, the third region and the fourth region being staggered with each other, And the third optical axis is perpendicular to the fourth optical axis; wherein the first region corresponds to the third region, and the area, the shape and the arrangement thereof are the same, the first optical axis and the third The direction of the optical axis is the same; the second area corresponds to the fourth area, and the area, shape and arrangement thereof are the same, and the direction of the second optical axis and the fourth optical axis are the same. The anti-spy structure according to claim 1, wherein the anti-spy view angle θ on one side of the anti-spy structure satisfies θ=tan ⁻¹ (W/D), and the W is the first region and the second The width of the region, the third region, or the fourth region, D is the thickness of the transparent substrate. The anti-spy structure according to claim 1, wherein the first optical axis, the second optical axis, the third optical axis and the fourth optical axis are arranged in a continuous or discontinuous manner. The anti-spy structure according to claim 1, wherein the first optical The film and the second optical film comprise a polarizer and a patterned retardation film. The anti-spy structure according to claim 3, wherein the retardation value of the patterned retardation film of the first optical film and the second optical film is ± λ /4. The anti-spy structure according to claim 3, wherein the retardation value of the patterned retardation film of the first optical film and the second optical film is ± λ /2. The anti-spy structure according to claim 1, wherein the transparent substrate has a thickness of from 1 mm to 100 mm. The anti-spy structure according to claim 1, wherein the first region and the second region of the first optical film have a width of between 0.25 mm and 60 mm. The anti-spy structure of claim 1, wherein the third region and the fourth region of the second optical film have a width of between 0.25 mm and 60 mm. The anti-spy structure according to claim 1, further comprising at least one functional film layer disposed on one side of the anti-spy structure, the functional film layer being selected from the group consisting of a heat insulation film, an explosion-proof film, and a hard film. Coating, anti-fouling film, brightness enhancing film or a combination thereof.