CN110568531A - Peep-proof film and display device - Google Patents
Peep-proof film and display device Download PDFInfo
- Publication number
- CN110568531A CN110568531A CN201910889142.0A CN201910889142A CN110568531A CN 110568531 A CN110568531 A CN 110568531A CN 201910889142 A CN201910889142 A CN 201910889142A CN 110568531 A CN110568531 A CN 110568531A
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- peep
- proof
- light
- refraction
- privacy
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application provides a peep-proof membrane and a display device. This peep-proof membrane includes: a plurality of peep-proof portions, a plurality of first refraction portion and a plurality of second refraction portion, each peep-proof portion interval sets up, each peep-proof portion has first end and second end, first refraction portion sets up between the first end of two adjacent peep-proof portions, second refraction portion sets up between the second end of two adjacent peep-proof portions, first refraction portion is used for converging incident light, second refraction portion is used for refracting the light that converges through first refraction portion, make the exit angle of light be less than the angle threshold value. Through above-mentioned structure, can reduce the light-emitting angle such as big visual angle incident ray, reduce the probability of sheltering from incident ray for more light can pass the peep-proof membrane, thereby promote the light luminance through the peep-proof membrane.
Description
Technical Field
the application relates to the technical field of display, in particular to a peep-proof film and a display device.
Background
With the continuous development of science and technology, various display devices such as mobile phones, tablet computers and displays are diversified, and great convenience is brought to the work and life of people. In the use of display device, can involve the problem of user's privacy protection usually, reduce display device's the demonstration visual angle through set up the peep-proof membrane on display device among the prior art, reduce the viewing effect of display device on the angle of squinting to protect user's privacy.
The existing peep-proof film is mainly characterized in that a plurality of peep-proof layers arranged at intervals are arranged between two transparent film layers, so that a structure similar to a shutter is formed. The working principle of the shutter structure is that the peep-proof layer is utilized to shield light rays with large visual angles, so that the function of a peep-proof screen is achieved.
However, in practical use, the inventors of the present application have found that, because the incident light that irradiates one transparent film layer in the privacy film is not vertical, light that is incident at a large angle is blocked and absorbed by the privacy layer between the two transparent film layers, and only a small portion of light that is incident at a small angle can reach the other transparent film layer from the one transparent film layer and exit, the luminance of light from the backlight source is significantly reduced, and if the backlight luminance is not changed, the power consumption of the backlight is increased.
Disclosure of Invention
In view of this, the present application provides a privacy protecting film and a display device, which solve the technical problems in the prior art, such as low backlight brightness through the privacy protecting film, or large power consumption of backlight source.
In order to solve the above problem, the embodiments of the present application mainly provide the following technical solutions:
In a first aspect, embodiments of the present application disclose a privacy film comprising: a plurality of peep-proof portions, a plurality of first refraction portions and a plurality of second refraction portions, wherein the peep-proof portions are arranged at intervals, each peep-proof portion is provided with a first end and a second end,
The first refraction portion is arranged between the first ends of two adjacent peep-proof portions, the second refraction portion is arranged between the second ends of two adjacent peep-proof portions,
the first refraction portion is used for converging incident light, and the second refraction portion is used for refracting the light passing through the convergence of the first refraction portion, so that the emergent angle of the light is smaller than an angle threshold value.
optionally, the first refraction portion, the second refraction portion and two adjacent peep-proof portions form a space, and a focus of the first refraction portion located in the space coincides with a focus of the second refraction portion located in the space.
optionally, the first refraction portion and the second refraction portion are convex lenses.
Optionally, the distance between two adjacent peep-proof parts is not less than 20 microns and not more than 50 microns.
Optionally, the material of the convex lens is polyethylene terephthalate.
Optionally, two ends of a first long shaft of the first refraction portion are respectively connected to the first ends of two adjacent peep-proof portions, and two ends of a second long shaft of the second refraction portion are respectively connected to the second ends of two adjacent peep-proof portions.
Optionally, the length of the first major axis is greater than or less than the length of the second major axis;
Or the length of the first long shaft is equal to that of the second long shaft, the peep-proof parts are parallel, and a preset angle is formed between the peep-proof parts and the first long shaft.
optionally, the privacy film further comprises: the first reflecting layer is arranged on the side wall of the peep-proof part facing the space and used for reflecting part of the light rays entering the space so as to enable the light rays to pass through the second refraction part.
Optionally, the privacy film further comprises: the second reflecting layer is arranged on the end wall of the peep-proof part between the two adjacent first refraction parts and used for reflecting the light rays irradiated to the second reflecting layer.
Optionally, the surface of the second reflective layer remote from the end wall is uneven.
In a second aspect, an embodiment of the present application discloses a display device, including: an upper prism sheet and a display panel, the display device further comprising: the privacy film of the first aspect,
The peep-proof film is arranged between the display panel and the upper prism sheet;
Or the peep-proof film is arranged on one side of the display panel far away from the upper prism sheet.
by means of the technical scheme, the technical scheme provided by the embodiment of the application at least has the following advantages:
The first refraction part is arranged between the first ends of the two adjacent peep-proof parts and is used for converging light rays from the backlight source; the second refraction portion is arranged between the second ends of the two adjacent peep-proof portions and used for refracting the light rays converged by the first refraction portion. Through the cooperation of first refraction portion and second refraction portion for the exit angle of light is less than the angle threshold value, can reduce such as the light-emitting angle of big visual angle incident ray, reduces the probability that shelters from incident ray, makes more light can pass the peep-proof membrane, promotes the light luminance through the peep-proof membrane.
The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and the embodiments of the present application can be implemented according to the content of the description in order to make the technical means of the embodiments of the present application more clearly understood, and the detailed description of the embodiments of the present application will be given below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the alternative embodiments. The drawings are only for purposes of illustrating alternative embodiments and are not to be construed as limiting the embodiments of the present application. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural view of a privacy film of the present application;
FIG. 2 is a perspective view of the privacy film of the present application;
FIG. 3 is a schematic structural view of another embodiment of the privacy film of the present application;
FIG. 4 is a schematic structural diagram of a display device according to a first embodiment of the present application;
Fig. 5 is a schematic structural diagram of a display device according to a second embodiment of the present application.
The reference numerals are introduced as follows:
1-a peep-proof membrane; 2-peep-proof part; 21 a first end; 22-a second end; 3-a first refraction; 4-a second refraction; 5-space; 6-focus; 7-a first reflective layer; 8-a second reflective layer;
9-a back plate; 10-a rubber frame; 11-a light bar; 12-a reflective sheet; 13-a light guide plate; 14-a diffusion sheet; 15-lower prism sheet; 16-upper prism sheet; 17-a display panel; a-refracting light; b-reflected light.
Detailed Description
exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It is to be understood that the term "and/or" as used herein is intended to include all or any and all combinations of one or more of the associated listed items.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In a first aspect, fig. 1 and fig. 2 show a schematic structural diagram and a perspective view of a privacy film 1 according to an embodiment of the present disclosure, respectively. As shown in fig. 1 and 2, the privacy film 1 includes: a plurality of peep-proof portions 2, a plurality of first refraction portions 3, and a plurality of second refraction portions 4. The peep-proof portions 2 are arranged at intervals, and each peep-proof portion 2 has a first end 21 and a second end 22. The first refraction portion 3 is disposed between the first ends 21 of two adjacent peep-proof portions 2, and the second refraction portion 4 is disposed between the second ends 22 of two adjacent peep-proof portions 2. The first refraction portion 3 is used for converging incident light, and the second refraction portion 4 is used for refracting the light converged by the first refraction portion 3, so that the emergent angle of the light is smaller than an angle threshold value.
The first refraction part is arranged between the first ends of the two adjacent peep-proof parts and is used for converging light rays from the backlight source; the second refraction portion is arranged between the second ends of the two adjacent peep-proof portions and used for refracting the light rays converged by the first refraction portion. Through the cooperation of first refraction portion and second refraction portion for the exit angle of light is less than the angle threshold value, can reduce for example the light-emitting angle of big visual angle light, lets more light can pass the peep-proof membrane, reduces the possibility of sheltering from incident light.
Optionally, with continued reference to fig. 1, in the present embodiment, the first refractive portion 3, the second refractive portion 4 and two adjacent peep-proof portions 2 form a space 5, and the focal point 6 of the first refractive portion 3 located in the space 5 coincides with the focal point 6 of the second refractive portion 4 located in the space 5. Since the space 5 is formed in the privacy film 1 of the present application, when a reflective layer or a refractive layer is provided at a predetermined position, light can be reflected or refracted as desired in the space 5, and the technical problem to be solved by the present application is solved.
The first refractive portion 3, the second refractive portion 4, and the adjacent two peep-proof portions 2 forming the space 5 may be regarded as one peep-proof film unit, and the peep-proof film 1 as shown in fig. 2 may be formed by arranging a plurality of peep-proof film units side by side.
With continued reference to fig. 1, in use, light originating from the backlight is irradiated to the side where the first refraction portion 3 is disposed, and at this time, a part of the light, which is referred to as refracted light a in this embodiment, passes through the first refraction portion 3 and is condensed by the first refraction portion 3 to form a focal point 6. The refracted light a continues to travel forward after being condensed at the focal point 6, and reaches the second refraction portion 4. Because the second refraction part 4 is also in the shape of a convex lens, the light-gathering effect is achieved, the light with a large visual angle can be converted into the light which is emitted vertically, the light-emitting angle of the light is reduced, and a better peeping-proof effect is achieved.
alternatively, on the basis of forming the space 5, the first refraction portion 3 and the second refraction portion 4 may be configured as convex lenses for changing the emergent angle of the light to achieve the light-gathering effect.
optionally, the distance between two adjacent peep-proof portions 2 is not less than 20 micrometers and not more than 50 micrometers. Since the first refraction portion 3 and the second refraction portion 4 are respectively arranged between the first end 21 and the second end 22 of two adjacent peep-proof portions 2. Specifically, the widths of the first and second refraction portions 3 and 4 may be not less than 20 micrometers and not more than 50 micrometers, so that the first and second refraction portions 3 and 4 form a micro-convex lens. In addition, the thickness range of the privacy film 1 may be not less than 100 micrometers and not more than 200 micrometers depending on the structure of an actual display device.
Since the privacy film 1 of the present application may be used to support other film layers or optical microstructures during actual design, the privacy film 1 needs to have certain hardness and firmness. In this embodiment, the material of the convex lens of the present application can be polyethylene terephthalate, and the use of this material not only can bear other film layers or optical microstructures, but also can further reduce the manufacturing cost and improve the market competitiveness.
Alternatively, since the first refraction portion 3 and the second refraction portion 4 are both convex lenses, this results in that both ends of the first long axis of the first refraction portion 3 are respectively connected with the first ends of two adjacent peep-proof portions 2, and both ends of the second long axis of the second refraction portion 4 are respectively connected with the second ends of two adjacent peep-proof portions 2.
Optionally, in the embodiment shown in fig. 1, the length of the first long axis is equal to the length of the second long axis, the peep-proof portions 2 are parallel, and a preset angle is formed between the peep-proof portions 2 and the first long axis. Optionally, the preset angle is 90 degrees, and the first refracting part 3 and the second refracting part 4 are perpendicular to the peep-proof part 2.
optionally, fig. 3 shows another embodiment of the present application, as shown in fig. 3, according to actual design requirements, the length of the first long axis may also be greater than or less than the length of the second long axis, so that the design of the anti-peeping film of the present application is more diversified, and the market competitiveness is improved.
In order to enable more light to pass through the privacy film without affecting the privacy effect, optionally, the privacy film 1 further includes: and the first reflecting layer 7 is arranged on the side wall of the peep-proof part 2 facing the space 5 and used for reflecting part of light rays entering the space 5 so that the light rays pass through the second refracting part 4.
As shown in fig. 1, first reflective layers 7 are provided on both left and right surfaces of the peep preventing portion 2 for reflecting light rays, which are referred to as reflected light b in the present embodiment. Through the first reflecting layer 7, a part of the reflected light b can reflect the light which cannot reach the focus 6, so that the light is gathered on the focus 6, the light gathering effect of the first refraction part 3 and the second refraction part 4 is further enhanced, and the light extraction rate is improved. Of course, the other part of the reflected light b that has not entered the focal point 6 may be reflected and then emitted from the second refraction portion 4, thereby further improving the light emission efficiency.
Optionally, the privacy film 1 further comprises: and the second reflecting layer 8 is arranged on the end wall of the peep-proof part 2 between the two adjacent first refraction parts 3 and used for reflecting light rays irradiated to the second reflecting layer 8.
specifically, the second reflection layer 8 is arranged on the end wall of the peep-proof portion 2 between the two adjacent first refraction portions 3, so that light rays originally irradiated on the end wall can be reflected back to the backlight source, the light rays are reflected to the first refraction portions 3 again through the reflection sheets at the backlight source, the light rays originally irradiated on the end wall can pass through the first refraction portions 3, and the light extraction rate is further enhanced.
In this embodiment, optionally, the surface of the second reflective layer 8 away from the end wall is uneven, so that even if the vertical light irradiates the reflective layer 2, the direction of the light reflected back into the backlight can be multi-directional, ensuring that this part of the light can be recycled and pass through the first refractive part 3, further enhancing the light output.
To sum up, peep-proof membrane 1 of this application designs into convex lens shape with first refraction portion 3 and second refraction portion 4, can convert big visual angle light into the light of vertical ejection, further reduces the light-emitting angle of light, reaches better peep-proof effect. When the LED backlight is applied to a backlight, the power consumption of the backlight is reduced on the basis of not changing the brightness. In addition, through the first reflecting layer 7 and the second reflecting layer 8, under the condition that the peeping-proof angle is not changed, the originally blocked light rays pass through the peeping-proof film 1, the optical utilization rate is increased, and therefore the transmittance of the peeping-proof film 1 is improved.
in a second aspect, fig. 4 and 5 show a first embodiment and a second embodiment, respectively, of a display device of an embodiment of the present application. As shown in fig. 4 and 5, the display device may include: the backlight module comprises a back plate 9, a rubber frame 10, a light bar 11, a reflecting sheet 12, a light guide plate 13, a diffusion sheet 14, a lower prism sheet 15, an upper prism sheet 16 and a display panel 17. As shown in fig. 3, the display device further includes: the privacy film 1 of the first aspect.
The privacy film 1 is disposed between the display panel 17 and the upper prism sheet 16. Alternatively, in another embodiment, as shown in fig. 5, the privacy film 1 is disposed on the side of the display panel 17 away from the upper prism sheet 16.
Specifically, in the embodiment shown in fig. 4, a reflection sheet 12, a light guide plate 13, a diffusion sheet 14, a lower prism sheet 15, an upper prism sheet 16, a privacy film 1, and a display panel 17 are stacked in this order on a back sheet 9. The light bar 11 is disposed at a position close to the light incident surface of the light guide plate 13, and a position of a light emitting surface of the light bar 11 corresponds to a position of the light incident surface of the light guide plate 13. The rubber frame 10 is disposed around the rear panel 9, and is used for fixing and/or cushioning at least one of the light bars 11, the reflective sheet 12, the light guide plate 13, the diffusion sheet 14, the lower prism sheet 15, the upper prism sheet 16, the privacy film 1, and the display panel 17.
In the embodiment shown in fig. 5, a reflection sheet 12, a light guide plate 13, a diffusion sheet 14, a lower prism sheet 15, an upper prism sheet 16, a display panel 17, and a privacy film 1 are stacked in this order on a back sheet 9. The light bar 11 is disposed at a position close to the light incident surface of the light guide plate 13, and a position of a light emitting surface of the light bar 11 corresponds to a position of the light incident surface of the light guide plate 13. The rubber frame 10 is disposed around the back plate 9, and is used for fixing and/or buffering at least one of the light bars 11, the reflective sheet 12, the light guide plate 13, the diffusion sheet 14, the lower prism sheet 15, the upper prism sheet 16, the display panel 17, and the privacy film 1.
Since the display device of the second aspect includes the privacy film of the first aspect, the display device has the same advantageous effects as the privacy film. Therefore, the advantageous effects of the display device of the second aspect will not be repeated herein.
the beneficial effects obtained by applying the embodiment of the application comprise:
1. The first refraction part is arranged between the first ends of the two adjacent peep-proof parts and is used for converging light rays from the backlight source; the second refraction portion is arranged between the second ends of the two adjacent peep-proof portions and used for refracting the light rays converged by the first refraction portion. Through the cooperation of first refraction portion and second refraction portion for the exit angle of light is less than the angle threshold value, can reduce such as the light-emitting angle of big visual angle incident ray, reduces the probability that shelters from incident ray, makes more light can pass the peep-proof membrane, promotes the light luminance through the peep-proof membrane.
2. Through the first reflecting layer, part of reflected light can reflect light which cannot reach a focus, so that the light is gathered to the focus, the light gathering effect of the first refraction part and the second refraction part is further enhanced, and the light extraction rate is improved. The reflected light that has not entered the focal point may be reflected and then emitted from the second refraction portion, thereby further improving the light extraction efficiency.
3. Because set up the second reflection stratum on the end wall that peep-proof position is located between two adjacent first refraction portions, can get back to the backlight with the light reflection that shines originally on the end wall, reflect this light to first refraction portion once more through the reflector plate of backlight department, let the light that shines originally on the end wall can pass first refraction portion, further strengthen the light-emitting rate.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (11)
1. A privacy film (1), characterized by comprising: a plurality of peep-proof parts (2), a plurality of first refraction parts (3) and a plurality of second refraction parts (4), wherein the peep-proof parts (2) are arranged at intervals, each peep-proof part (2) is provided with a first end (21) and a second end (22),
The first refraction part (3) is arranged between the first ends (21) of two adjacent peep-proof parts (2), the second refraction part (4) is arranged between the second ends (22) of two adjacent peep-proof parts (2),
The first refraction portion (3) is used for converging incident light, and the second refraction portion (4) is used for refracting the light converged by the first refraction portion (3), so that the emergent angle of the light is smaller than an angle threshold value.
2. The privacy film (1) according to claim 1, wherein the first refractive portion (3), the second refractive portion (4) and two adjacent privacy portions (2) form a space, and a focal point (6) of the first refractive portion (3) located in the space (5) coincides with a focal point (6) of the second refractive portion (4) located in the space (5).
3. The privacy film (1) according to claim 1, wherein the first refractive portion (3) and the second refractive portion (4) are convex lenses.
4. The privacy film (1) according to claim 3, wherein the distance between adjacent two privacy portions (2) is not less than 20 microns and not more than 50 microns.
5. The privacy film (1) according to claim 3, wherein the material of the convex lens is polyethylene terephthalate.
6. The privacy film (1) according to claim 3, wherein both ends of a first long axis of the first refractive portion (3) are connected to the first ends of two adjacent privacy portions (2), respectively, and both ends of a second long axis of the second refractive portion (4) are connected to the second ends of two adjacent privacy portions (2), respectively.
7. The privacy film (1) of claim 6, wherein the length of the first major axis is greater than or less than the length of the second major axis;
Or the length of the first long shaft is equal to that of the second long shaft, the peep-proof parts (2) are parallel, and a preset angle is formed between the peep-proof parts (2) and the first long shaft.
8. The privacy film (1) according to claim 2, further comprising: the first reflecting layer (7) is arranged on the side wall, facing the space (5), of the peep-proof part (2) and used for reflecting part of the light rays entering the space (5) so that the light rays pass through the second refraction part (4).
9. the privacy film (1) according to claim 8, further comprising: the second reflecting layer (8) is arranged on the end wall, between every two adjacent first refraction parts (3), of the peep-proof part (2) and used for reflecting the light irradiated to the second reflecting layer (8).
10. Privacy film (1) according to claim 9, wherein the surface of the second reflective layer (8) remote from the end wall is uneven.
11. A display device, comprising: an upper prism sheet (16) and a display panel (17), characterized by further comprising: the privacy film (1) of any one of claims 1-10,
The peep-proof film (1) is arranged between the display panel (17) and the upper prism sheet (16);
or the peep-proof film (1) is arranged on one side of the display panel (17) far away from the upper prism sheet (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910889142.0A CN110568531A (en) | 2019-09-19 | 2019-09-19 | Peep-proof film and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910889142.0A CN110568531A (en) | 2019-09-19 | 2019-09-19 | Peep-proof film and display device |
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| Publication Number | Publication Date |
|---|---|
| CN110568531A true CN110568531A (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910889142.0A Pending CN110568531A (en) | 2019-09-19 | 2019-09-19 | Peep-proof film and display device |
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| CN (1) | CN110568531A (en) |
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| JP2013242519A (en) * | 2012-04-25 | 2013-12-05 | Toppan Printing Co Ltd | Self-power-generation sheet, and portable equipment having pixel circuit with the same |
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Application publication date: 20191213 |
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| RJ01 | Rejection of invention patent application after publication |