Active peep-proof sheet
By setting up a light shield at the spacer position of the anti-sighting sheet, the light leakage problem caused by the existing anti-sighting sheet due to the spacer is solved, which significantly enhances the anti-sighting effect and prevents information leakage.
Patent Information
- Application Number
- CN202310862357.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-14
- Publication Date
- 2025-01-14
AI Technical Summary
The existing anti-peeping films have poor anti-peeping effect due to light leakage at the edge of the interval unit, which cannot effectively prevent the leakage of confidential information.
A light shield is provided at the position of the spacer. Through the cooperation of the liquid crystal layer and the transparent conductive layer, the position and shape of the light shield are controlled to cover the orthogonal projection of the spacer and reduce light leakage.
It effectively reduces light leakage caused by spacers, enhances the anti-peeping effect of the anti-peeping film, and reduces the risk of information leakage.
Smart Images
Figure CN119310767A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an anti-peeping film, and in particular to an active anti-peeping film with a light-shielding film. Background Art
[0002] Most display devices today have a wide viewing angle display effect, but in certain scenarios, such as when processing confidential information or personal privacy information, the displayed confidential information may be viewed by others due to the wide viewing angle effect of the display device, resulting in the risk of information leakage. To avoid the above risks, a privacy film can be set on the display device to reduce the viewing angle of the display device, thereby achieving a privacy protection effect. However, the general privacy film has a poor privacy protection effect due to factors such as light leakage at the edge of the spacer unit, so there is still room for improvement. Summary of the invention
[0003] An embodiment of the present invention provides an active privacy screen, which improves the light leakage problem caused by a spacer by disposing a light shielding member at a position corresponding to the spacer.
[0004] One aspect of the present invention is to provide an active privacy film, which includes a first substrate structure, a second substrate structure, a liquid crystal layer, a plurality of spacers and a plurality of shading members. The second substrate structure is arranged relative to the first substrate structure, and further includes a substrate, a transparent conductive layer and an alignment layer. The liquid crystal layer is located between the first substrate structure and the second substrate structure. A plurality of spacers are located between the first substrate structure and the second substrate structure. A plurality of shading members are arranged in the second substrate structure and are arranged in a one-to-one correspondence with the plurality of spacers, and the orthographic projections on the first substrate structure respectively cover the orthographic projections of the plurality of spacers on the first substrate structure.
[0005] In some embodiments, the second substrate structure includes a substrate, a transparent conductive layer and an alignment layer. The transparent conductive layer is located between the substrate and the liquid crystal layer. The alignment layer is located between the transparent conductive layer and the liquid crystal layer. A plurality of light shielding elements are disposed between the substrate and the transparent conductive layer.
[0006] In some embodiments, the plurality of light shielding elements are randomly arranged in a plane direction of the active privacy film.
[0007] In some embodiments, each of the plurality of light shielding members is a metal sheet.
[0008] In some embodiments, each of the plurality of light-shielding elements has a planar solid circle shape or a planar hollow circle shape.
[0009] Another aspect of the present invention is to provide an active privacy film, which includes a first substrate structure, a second substrate structure, a liquid crystal layer, a plurality of spacers and a plurality of shading members. The second substrate structure is arranged relative to the first substrate structure, and further includes a substrate, a transparent conductive layer and an alignment layer. The liquid crystal layer is located between the first substrate structure and the second substrate structure. A plurality of spacers are located between the first substrate structure and the second substrate structure. A plurality of shading members are arranged in the first substrate structure and are arranged in a one-to-one correspondence with the plurality of spacers, and the orthographic projections on the second substrate structure respectively cover the orthographic projections of the plurality of spacers on the second substrate structure.
[0010] In some embodiments, the first substrate structure includes a substrate, a transparent conductive layer and an alignment layer. The transparent conductive layer is located between the substrate and the liquid crystal layer. The alignment layer is located between the transparent conductive layer and the liquid crystal layer. A plurality of light shielding elements are disposed between the substrate and the transparent conductive layer.
[0011] In some embodiments, the plurality of light shielding elements are randomly arranged in a plane direction of the active privacy film.
[0012] In some embodiments, each of the plurality of light shielding members is a metal sheet.
[0013] In some embodiments, each of the plurality of light-shielding elements has a planar solid circle shape or a planar hollow circle shape.
[0014] The beneficial effect of the present invention is at least that, by disposing a light shielding member at a position corresponding to the spacer, the problem of light leakage caused by the spacer is improved, thereby enhancing the privacy protection effect of the active privacy protection film. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] For a more complete understanding of the embodiments and their advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which:
[0016] Figure 1 is a schematic cross-sectional view of the structure of an active privacy screen according to a first embodiment of the present invention;
[0017] Figure 2 Viewed from a side angle Figure 1 Schematic diagram of an active privacy screen;
[0018] Figure 3 is a schematic cross-sectional view of the structure of an active privacy screen according to a second embodiment of the present invention;
[0019] Figure 4 is a schematic cross-sectional view of the structure of an active privacy screen according to a third embodiment of the present invention;
[0020] Figure 5 FIG. 4 is a schematic cross-sectional view of an active privacy film according to a fourth embodiment of the present invention.
[0021]
Explanation of symbols
[0022] 100,300,400,500: Active privacy film
[0023] 110, 310, 410, 510: first substrate structure
[0024] 112,312,412,512: first substrate
[0025] 114,314,414,514: first transparent conductive layer
[0026] 116,316,416,516: first alignment layer
[0027] 120,320,420,520: Second substrate structure
[0028] 122,322,422,522: Second substrate
[0029] 124,324,424,524: Second transparent conductive layer
[0030] 126,326,426,526: Second alignment layer
[0031] 130,330,430,530: Liquid crystal layer
[0032] 140,340,440a,440b,440c,540a,540b: Spacer
[0033] 150,350,450a,450b,450c,550a1,550a2,550b: Shading parts
[0034] L1, L2: Extended vision
[0035] θ: Side view
[0036] A: Extended shading area DETAILED DESCRIPTION
[0037] The following is a detailed discussion of the embodiments of the present invention. It is understood that the embodiments provide many applicable concepts that can be implemented in a variety of specific contents. The embodiments discussed and disclosed are for illustration only and are not intended to limit the scope of the present invention.
[0038] The terms used in this article are only for describing specific embodiments and are not intended to limit the scope of the patent application. Unless otherwise limited, the singular forms of "a", "an" or "the" may also be used to represent plural forms.
[0039] It is to be understood that, although the terms "first" and "second" used in this document may be used to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from other elements.
[0040] To simplify the drawings, some conventional structures and elements in the art are depicted in simple schematic form in the drawings, or are not shown in the drawings. The actual sizes and proportions of the elements in this document are not limited to those shown in the drawings.
[0041] In addition, in the description of the figures, similar elements have names and numbers similar to those of the previous figures. When subsequent figures utilize elements with different contexts or different functions, the elements have different high-order digits to represent different figure numbers (e.g., Figure 1 lxx and Figure 2 Specific numbers assigned to various components are used only to facilitate description and are not intended to imply any structural or functional limitations.
[0042] Figure 1 : is a schematic diagram of the structure of the active privacy film 100 according to the first embodiment of the present invention. The active privacy film 100 can be disposed on a display device so that it is difficult for a viewer at a wide viewing angle to view the image of the display device and / or recognize the information in the image. The active privacy film 100 includes a first substrate structure 110, a second substrate structure 120, a liquid crystal layer 130, a spacer 140 and a shading member 150, wherein the liquid crystal layer 130 is located between the first substrate structure 110 and the second substrate structure 120, the spacer 140 is located between the first substrate structure 110 and the second substrate structure 120, and the shading member 150 is disposed in the first substrate structure 110. For the convenience of explanation, Figure 1 Only a partial structure of the active privacy film 100 is shown, but those skilled in the art can directly know from the context and all the drawings that the active privacy film 100 has a plurality of spacers 140 and corresponding light shielding members 150 .
[0043] The first substrate structure 110 and the second substrate structure 120 are disposed opposite to each other. The first substrate structure 110 includes a first substrate 112 and a first transparent conductive layer 114 and a first alignment layer 116 disposed in sequence on the first substrate 112, and the second substrate structure 120 includes a second substrate 122 and a second transparent conductive layer 124 and a second alignment layer 126 disposed in sequence on the second substrate 122. The first substrate 112 and the second substrate 122 may be hard substrates, and their materials may include, for example, glass, quartz, ceramic, sapphire, other suitable materials or combinations thereof, or may be flexible substrates, and their materials may include, for example, polyimide (PI), polyethylene terephthalate (PET), polycarbonate (PC), polymethyl methacrylate (PMMA), other suitable materials or combinations thereof, but are not limited thereto. The first transparent conductive layer 114 and the second transparent conductive layer 124 include transparent conductive materials, such as indium tin oxide (ITO), indium zinc oxide (IZO) or other suitable transparent conductive materials. The first transparent conductive layer 114 and the second transparent conductive layer 124 serve as electrodes for driving the liquid crystal layer 130. By controlling the potential difference between the first transparent conductive layer 114 and the second transparent conductive layer 124, the electric field between the first transparent conductive layer 114 and the second transparent conductive layer 124 can be adjusted so that the liquid crystal molecules in the liquid crystal layer 130 are twisted accordingly, thereby controlling the privacy protection function of the active privacy protection film 100. The first alignment layer 116 and the second alignment layer 126 both have a predetermined alignment direction, so that the liquid crystal molecules in the liquid crystal layer 130 are arranged at a predetermined tilt angle. Depending on the type of liquid crystal molecules and the driving method, the alignment directions of the first alignment layer 116 and the second alignment layer 126 may be the same or different (e.g., perpendicular to each other), or both the first alignment layer 116 and the second alignment layer 126 may have multiple alignment directions, but the invention is not limited thereto. The material of the first alignment layer 116 and the second alignment layer 126 may be, for example, polyimide or other suitable materials. The liquid crystal molecules in the liquid crystal layer 130 may be, for example, nematic liquid crystal molecules, smectic liquid crystal molecules, cholesterol liquid crystal molecules or other suitable liquid crystal molecules.
[0044] The spacer 140 is used to control the thickness and uniformity between the first substrate structure 110 and the second substrate structure 120. The material of the spacer 140 can be glass fiber, photoresist (such as photosensitive resin) or other suitable materials. The light shielding member 150 is disposed on the second substrate 122 and is located between the second substrate 122 and the second transparent conductive layer 124, which is used to shield the light leakage that may be generated by the presence of multiple spacers 140 in the liquid crystal layer 130. The number of light shielding members 150 and spacers 140 is equal and is arranged in a one-to-one correspondence. In addition, the orthographic projection of the light shielding member 150 on the first substrate structure 110 covers the orthographic projection of the spacer 140 on the first substrate structure 110 respectively. The material of the light shielding member 150 can be a metal sheet (such as chrome), a photosensitive resin or other suitable light shielding material. In some embodiments, the spacer 140 and the corresponding light shielding member 150 are randomly arranged in the plane direction of the active anti-peeping film 100 to further enhance the anti-peeping effect.
[0045] In one embodiment of the present invention, the active privacy film 100 includes a plurality of spacers 140, each of which is made of a transparent material. Since these transparent spacers 140 may cause light leakage in the active privacy film 100, the present invention proposes a plurality of light shielding members 150 randomly arranged corresponding to these spacers 140 to shield the light leakage caused by these spacers 140, thereby improving the light leakage problem of the active privacy film 100.
[0046] In one embodiment of the present invention, each of the plurality of shading members 150 disposed corresponding to the plurality of spacers 140 may be a planar solid circle or a planar hollow circle with a hollow center. The planar solid circle shading member has a lower light leakage than the planar hollow circle shading member.
[0047] Figure 2 is a schematic diagram of viewing the active privacy film 100 from a side angle θ. Figure 2 As shown, the width of the shading member 150 depends on the shape and size of the spacer 140. The extended light shielding area A required by the spacer 140 can be measured from the extended sight lines L1 and L2 along the side angle θ of the user looking at the active privacy film 100 from the side of the spacer 140, and the extended light shielding area A is used as the basis for setting the width of the shading member 150 to solve the light leakage problem of the active privacy film 100 caused by the spacer 140 itself being a transparent material. The side angle θ can be, for example, 45 degrees, which can be determined according to product specification requirements.
[0048] Figure 3 FIG. 2 is a schematic cross-sectional view of an active privacy film 300 according to a second embodiment of the present invention. Figure 3As shown, the active privacy film 300 includes a first substrate structure 310, a second substrate structure 320, a liquid crystal layer 330, a spacer 340 and a light shielding member 350, wherein the first substrate structure 310 includes a first substrate 312, a first transparent conductive layer 314 and a first alignment layer 316, and the second substrate structure 320 includes a second substrate 322, a second transparent conductive layer 324 and a second alignment layer 326. Figure 1 In the active privacy film 300, the shading member 350 is disposed in the first substrate structure 310 and is located between the first substrate 312 and the first transparent conductive layer 314, rather than being disposed in the second substrate structure 320, and the orthographic projection of the shading member 350 on the second substrate structure 320 covers the orthographic projection of the spacer 340 on the second substrate structure 320.
[0049] Figure 4 FIG. 4 is a schematic cross-sectional view of an active privacy film 400 according to a third embodiment of the present invention. Figure 4 As shown, the active privacy film 400 includes a first substrate structure 410, a second substrate structure 420, a liquid crystal layer 430, spacers 440a, 440b, 440c and light shielding members 450a, 450b, 450c, wherein the first substrate structure 410 includes a first substrate 412, a first transparent conductive layer 414 and a first alignment layer 416, and the second substrate structure 420 includes a second substrate 422, a second transparent conductive layer 424 and a second alignment layer 426. Compared to Figure 1 In the active privacy film 400, the sizes and heights of the spacers 440a, 440b, and 440c are different, and the sizes of the corresponding light shielding members 450a, 450b, and 450c are also different. In other words, the sizes of the light shielding members 450a, 450b, and 450c are determined according to the sizes and heights of the spacers 440a, 440b, and 440c, respectively.
[0050] Figure 5 is a schematic cross-sectional view of the structure of an active privacy film 500 according to a fourth embodiment of the present invention. The active privacy film 500 comprises a first substrate structure 510, a second substrate structure 520, a liquid crystal layer 530, spacers 540a, 540b and light shielding members 550a1, 550a2, 550b, wherein the first substrate structure 510 comprises a first substrate 512, a first transparent conductive layer 514 and a first alignment layer 516, and the second substrate structure 520 comprises a second substrate 522, a second transparent conductive layer 524 and a second alignment layer 526. Compared to Figure 4In the active privacy film 500, the spacer 540a corresponds to the light shielding members 550a1 and 550a2 respectively disposed on the second substrate 522 and the first substrate 512, while the spacer 540a only corresponds to the light shielding member 550b disposed on the second substrate 522. In other words, in Figure 5 In the embodiment, the corresponding relationship between the light shielding members and the spacers is one-to-one (eg, light shielding members 550b to spacer 540b) or two-to-one (eg, light shielding members 550a1, 550a2 to spacer 540a).
[0051] In summary, the present invention can improve the light leakage problem caused by the spacer, thereby enhancing the privacy protection effect of the active privacy film.
[0052] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the scope of the present invention. Any person having ordinary knowledge in the technical field may make various changes, substitutions and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on that defined by the attached claims.
Claims
1. An active privacy screen, characterized in that: Include: a first substrate structure; a second substrate structure, arranged relative to the first substrate structure; a liquid crystal layer, located between the first substrate structure and the second substrate structure; a plurality of spacers, located between the first substrate structure and the second substrate structure; as well as A plurality of shading members are arranged in the second substrate structure, the plurality of shading members and the plurality of spacers are arranged in a one-to-one correspondence, and the orthographic projections of the plurality of shading members on the first substrate structure respectively cover the orthographic projections of the plurality of spacers on the first substrate structure.
2. The active privacy screen as claimed in claim 1, wherein: The second substrate structure comprises: a substrate; a transparent conductive layer located between the substrate and the liquid crystal layer; and an alignment layer, located between the transparent conductive layer and the liquid crystal layer; The plurality of light shielding elements are disposed between the substrate and the transparent conductive layer.
3. The active privacy screen as claimed in claim 1, wherein: The plurality of shading elements are randomly arranged in a plane direction of the active privacy film.
4. The active privacy screen as claimed in claim 1, wherein: Each of the plurality of light shielding elements is a metal sheet.
5. The active privacy screen as claimed in claim 4, wherein: Each of the plurality of shading elements has a planar solid circle shape or a planar hollow circle shape.
6. An active privacy screen, characterized in that: Include: a first substrate structure; a second substrate structure, arranged relative to the first substrate structure; a liquid crystal layer, located between the first substrate structure and the second substrate structure; a plurality of spacers, located between the first substrate structure and the second substrate structure; as well as A plurality of shading members are arranged in the first substrate structure, the plurality of shading members and the plurality of spacers are arranged in a one-to-one correspondence, and the orthographic projections of the plurality of shading members on the second substrate structure respectively cover the orthographic projections of the plurality of spacers on the second substrate structure.
7. The active privacy screen as claimed in claim 6, wherein: The first substrate structure comprises: a substrate; a transparent conductive layer located between the substrate and the liquid crystal layer; and an alignment layer, located between the transparent conductive layer and the liquid crystal layer; The plurality of light shielding elements are disposed between the substrate and the transparent conductive layer.
8. The active privacy screen as claimed in claim 6, wherein: The plurality of shading elements are randomly arranged in a plane direction of the active privacy film.
9. The active privacy screen as claimed in claim 6, wherein: Each of the plurality of light shielding elements is a metal sheet.
10. The active privacy screen as claimed in claim 6, wherein: Each of the plurality of shading elements has a planar solid circle shape or a planar hollow circle shape.