CN205405002U - Changeable peep -proof display device and backlight - Google Patents
Changeable peep -proof display device and backlight Download PDFInfo
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- CN205405002U CN205405002U CN201620157686.XU CN201620157686U CN205405002U CN 205405002 U CN205405002 U CN 205405002U CN 201620157686 U CN201620157686 U CN 201620157686U CN 205405002 U CN205405002 U CN 205405002U
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Abstract
The utility model discloses a changeable peep -proof display device and backlight relates to the demonstration field, can realize narrow visual angle and wide viewing angle's switching, and with low costs. The utility model discloses a changeable peep -proof display device, include: the backlight that sets gradually, the optics spare that has collimation or centering focus effect, changeable diffusion piece and display panel, the backlight is used for doing display panel provides in a poor light, changeable diffusion piece can switch between transparent attitude and scattering attitude, when being in transparent attitude, changeable diffusion piece does not change the direction of propagation who is shaded, when being in the scattering attitude, changeable diffusion piece is right be shaded and carry out the scattering, obtain wide viewing angle and be shaded.
Description
Technical field
This utility model relates to display field, particularly relates to a kind of changeable peep-proof display device and backlight.
Background technology
Having spectacle technology and bore hole formula technology in existing peep-proof technology, spectacle technology carries out the separation protection of security information by external auxiliary device (such as auxiliary eyeglasses), and bore hole formula technology is by realizing peep-proof to the control of incident angle of light.And it is relatively fewer with the technology of normal display switching to realize peep-proof simultaneously, utilize director backlight technology can realize the switching at width visual angle, but this technology is high to the making of light guide plate and the requirement of Rhizoma Dioscoreae (peeled) (LEDlightingBar), and general backlight manufacturer is more difficult to meet design requirement.
It addition, independent 3M peep-proof film can only realize peep-proof and show, 3M peep-proof film can realize the switching between peep-proof and normal display in conjunction with other additional device, but 3M peep-proof film is costly, and volume production has bigger difficulty.Specifically as shown in Figure 1, light oriented film 12 and changeable diffusion sheet 13 are set between backlight assembly 11 and display floater 3, changeable diffusion sheet 13 adopts PDLC (PolymerDispersedLiquidCrystal, PDLC) scattering film, and light oriented film 12 adopts 3M peep-proof film.During narrow visual angle (peep-proof shows), changeable diffusion sheet 13 is in clear state, its incident angle of light after light oriented film 12 is defined, during then through changeable diffusion sheet 13, owing to changeable diffusion sheet 13 is in clear state, limited incident illumination is after changeable diffusion sheet 13, and its incident direction is still defined, it may be achieved narrow visual angle shows；And when changeable diffusion sheet 13 switches to scattering states, after light oriented film 12, incident illumination is defined incident angle, but after changeable diffusion sheet 13, directional rays is by uniform scattering, such incident illumination becomes uniform non-directional light, thus showing that picture becomes non-narrow visual angle picture (normally display).The shortcoming of the program is owing to 3M peep-proof film cost is too high, it is difficult to realize the mass production of product.
Utility model content
This utility model provides a kind of changeable peep-proof display device and backlight, it is possible to achieve the switching of narrow visual angle and wide viewing angle, and cost is low.
For reaching above-mentioned purpose, embodiment of the present utility model adopts the following technical scheme that
This utility model embodiment provides a kind of changeable peep-proof display device, including: the backlight that sets gradually, has collimation or to the optical element of centre focus effect, changeable diffusion sheet and display floater；Described backlight is for providing backlight for described display floater；Described changeable diffusion sheet can switch between clear state and scattering states, and when being in clear state, described changeable diffusion sheet does not change the direction of propagation of described backlight；When being in scattering states, described backlight is scattered by described changeable diffusion sheet, it is thus achieved that wide viewing angle backlight.
Preferably, have described in collimation or be Fresnel Lenses to the optical element of centre focus.
Alternatively, the bright finish of described Fresnel Lenses is relative with the exiting surface of described backlight, and described backlight includes light source, light guide plate and diffusion sheet；Or, on described Fresnel Lenses, imprinting has concentrically ringed one side relative with the exiting surface of described backlight, and described backlight includes light source and reflector plate, does not include light guide plate and diffusion sheet.
Alternatively, described changeable diffusion sheet includes: the scattering film that PDLC or multistable state liquid srystal are made.
Alternatively, there is described in collimation or at least cover the viewing area of described display floater to the optical element of centre focus effect.
This utility model embodiment also provides for a kind of backlight, it is adaptable to changeable peep-proof display device, including the backlight assembly set gradually, has collimation or to the optical element of centre focus effect, changeable diffusion sheet；Described backlight assembly at least includes light source, is used for providing backlight；Described changeable diffusion sheet can switch between clear state and scattering states, and when being in clear state, described changeable diffusion sheet does not change the direction of propagation of described backlight；When being in scattering states, described backlight is scattered by described changeable diffusion sheet, it is thus achieved that wide viewing angle backlight.
Preferably, have described in collimation or be Fresnel Lenses to the optical element of centre focus.
Alternatively, the bright finish of described Fresnel Lenses is relative with the exiting surface of described backlight assembly, and described backlight assembly includes light source, light guide plate and diffusion sheet；Or, on described Fresnel Lenses, imprinting has concentrically ringed one side relative with the exiting surface of described backlight assembly, and described backlight assembly includes light source and reflector plate, does not include light guide plate and diffusion sheet.
Alternatively, described changeable diffusion sheet includes: the scattering film that PDLC or multistable state liquid srystal are made.
This utility model provides a kind of changeable peep-proof display device and backlight, by there is collimation or to the optical element of centre focus effect and changeable diffusion sheet, it is achieved narrow visual angle show the switching between (peep-proof shows) and non-narrow visual angle picture (normally showing).Specifically, backlight is by having collimation or realizing collimation orientation to the optical element of centre focus effect, for narrow visual angle, when switching diffusion sheet and being in clear state, during the switching diffusion sheet injection of backlight self-induced transparency state, its direction is constant is still defined, it may be achieved narrow visual angle shows；And when changeable diffusion sheet switches to scattering states, narrow visual angle incident illumination is after the changeable diffusion sheet of scattering states, directional rays is by uniform scattering, emergent light becomes uniform non-directional light, thus showing that picture becomes non-narrow visual angle picture, namely not possessing the normal display of peep-proof, meeting the real-time requirement under people's difference occasion, when needs carry out Information Sharing time, wide viewing angle pattern can be adopted；When needs individual's use or close use time, narrow field-of-view mode can be adopted.And compared with prior art, there is collimation or lower than 3M peep-proof film cost to the optical element of centre focus effect, it is easy to accomplish the mass production of product.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in this utility model embodiment, the accompanying drawing used required in embodiment will be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the principle schematic that prior art can realize peep-proof and the display device of normal display switching；
The principle schematic that a kind of changeable narrow visual angle of peep-proof display device that Fig. 2 provides for this utility model embodiment one shows；
The principle schematic that a kind of changeable peep-proof display device wide viewing angle that Fig. 3 provides for this utility model embodiment one shows；
The principle schematic that the narrow visual angle of another kind changeable peep-proof display device that Fig. 4 provides for this utility model embodiment one shows；
The principle schematic that the changeable peep-proof display device wide viewing angle of another kind that Fig. 5 provides for this utility model embodiment one shows；
The structural representation of the first backlight that Fig. 6 provides for this utility model embodiment two；
The structural representation of the second backlight that Fig. 7 provides for this utility model embodiment two.
Accompanying drawing labelling
11-backlight assembly, 12-light oriented film, the changeable diffusion sheet of 13-, 3-display floater,
14-backlight, 15-Fresnel Lenses, 141-light source, 142-point source.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in this utility model, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Embodiment one
This utility model embodiment provides a kind of changeable peep-proof display device, with reference to shown in Fig. 2～Fig. 4, this display device includes: the backlight 14 that sets gradually, have collimation or to the optical element (Fresnel Lenses 15 in figure) of centre focus effect, changeable diffusion sheet 13 and display floater 3；Backlight 14 is for providing backlight for display floater 3；Changeable diffusion sheet 13 can switch between clear state and scattering states, and when being in clear state, changeable diffusion sheet 13 does not change the direction of propagation of backlight；When being in scattering states, backlight is scattered by changeable diffusion sheet 13, it is thus achieved that wide viewing angle outgoing backlight.
In the present embodiment, backlight 14, have collimation or set gradually to the optical element of centre focus effect, changeable diffusion sheet 13 and display floater 3, backlight 14 provides backlight, there is collimation or at least cover the viewing area of display floater to the optical element of centre focus effect, collimation for realizing backlight is directed, and changeable diffusion sheet 13 realizes narrow visual angle and shows the switching between (peep-proof shows) and non-narrow visual angle picture (normally display).Specifically, the backlight directive switching diffusion sheet 13 after collimation orientation, when switching diffusion sheet 13 and being in clear state, switching diffusion sheet 13 is equivalent to a parallel glass brick, and emergent ray is parallel with incident ray, and namely during injection, backlight is still defined, display floater 3 is narrow visual angle display pattern, peep-proof；When changeable diffusion sheet switches to scattering states, switching diffusion sheet 13 place is by even back scattering directed for collimation, emergent light becomes uniform non-directional light, relatively can observe picture in wide viewing angle region, display floater 3 becomes wide viewing angle display pattern, namely no longer possesses the normal display of peep-proof function, it is possible to meet the real-time requirement under people's difference occasion.And compared with prior art, there is collimation or lower than 3M peep-proof film cost to the optical element of centre focus effect, it is easy to accomplish the mass production of product.
Above-mentioned display floater 3 is LCDs or other non-active light emitting display；The scattering film that switching diffusion sheet 13 can be PDLC or multistable state liquid srystal is made, can also be other device can changed between clear state and scattering states, it is also possible to be any implementation that can switch between clear state and scattering states well-known to those skilled in the art.
Optical element has collimation or to centre focus effect, it is preferable that Fresnel Lenses (Fresnellens).Fresnel Lenses, have another name called Fresnel lens, mostly it is by the thin slice of polyolefine material note pressure, also glass is had to make, lens surface one side is bright finish, the ascending concentric circular of another side imprinting, its texture is penetrated according to interference of light and disturbing and relative sensitivity and receiving angle require to design.
As shown in Figures 2 and 3, in a kind of specific embodiment, the bright finish of Fresnel Lenses 15 is relative with the exiting surface of backlight 14, and backlight 14 includes light source 141, light guide plate and diffusion sheet (not being shown specifically in figure), it is also possible to include other blooming piece.The area of the comparable luxuriant and rich with fragrance Neil lens 15 of display floater 3 can be slightly smaller.Backlight is by Fresnel Lenses 15 realization collimation orientation, and when switching diffusion sheet 13 and being in clear state, when backlight is by switching clear state diffusion sheet 13, the direction of propagation is almost constant, and display floater 3 is narrow visual angle display pattern, specifically as shown in Figure 2；When changeable diffusion sheet 13 switches to scattering states, switching diffusion sheet 13 place is by even back scattering directed for collimation, emergent light becomes uniform non-directional light, relatively can observe picture in wide viewing angle region, display floater 3 becomes wide viewing angle display pattern, meets the real-time requirement under people's difference occasion.The present embodiment changeable peep-proof display device can directly utilize existing backlight and display floater, only need to increasing Fresnel Lenses 15 and changeable diffusion sheet 13 between backlight and display floater, display device gets final product narrow field-of-view mode and the switching under the wide viewing angle pattern of normal display that tangible peep-proof shows.And, compared with prior art, there is collimation or lower than 3M peep-proof film cost to the optical element of centre focus effect, it is easy to accomplish the mass production of product.
As shown in Figure 4 and Figure 5, in another kind of specific embodiment, on Fresnel Lenses 15, imprinting has concentrically ringed one side relative with the exiting surface of backlight 14 (namely Fresnel Lenses 15 is inverted), and backlight 14 includes light source 141 and reflector plate, does not include light guide plate and diffusion sheet.Display device can be implemented in peep-proof and shows switching between the wide viewing angle of normal display, saves parts simultaneously, reduces cost.
Fei Nier lens 15 imprinting is had concentrically ringed one side to meet to backlight placement by the present embodiment, backlight 14 can adopt point source 142 to realize, what point source 142 sent converges the directional light that light becomes collimating after Fei Nier lens 15, when changeable diffusion sheet 13 is clear state, emergent ray remains as the directional light of collimation, display floater 3 shows as narrow visual angle state, as shown in Figure 4: during changeable diffusion sheet 13 scattering states, the directional light of collimation is by changeable diffusion sheet 13 homogenous diffusion, emergent light becomes uniform non-directional light, show that panel 3 shows as wide viewing angle state, as shown in Figure 5.Can removing original light guide plate and diffusion sheet in this embodiment in backlight 14, reflecting plate needs to retain, and is put in the lower section of point source.
The changeable peep-proof display device that this utility model provides, it is possible to achieve the switching of narrow visual angle and wide viewing angle, and cost is low.
Embodiment two
This utility model embodiment also provides for a kind of backlight suitable in changeable peep-proof display device, as shown in Figure 6 and Figure 7, this backlight includes setting gradually backlight assembly 11, there is collimation or to the optical element (the Fei Nier lens 15 in figure) of centre focus effect, changeable diffusion sheet 13；Backlight assembly is parts such as light source, light guide plate and the blooming piece etc. of composition backlight, and backlight assembly 11 herein at least should include light source, it is possible to is used for providing backlight；Changeable diffusion sheet 13 can switch between clear state and scattering states, and when being in clear state, described changeable diffusion sheet does not change the direction of propagation of backlight；When being in scattering states, backlight is scattered by changeable diffusion sheet 13, it is thus achieved that wide viewing angle backlight, it is possible to achieve the switching of narrow visual angle and wide viewing angle.
Preferably, have collimation or be Fresnel Lenses to the optical element of centre focus.
As shown in Figure 6, the bright finish of Fresnel Lenses 15 can be relative with the exiting surface of backlight assembly 11, and described backlight assembly 11 includes light source 141, light guide plate and diffusion sheet；Or, as it is shown in fig. 7, imprinting has concentrically ringed one side relative with the exiting surface of backlight assembly 11 on Fresnel Lenses 15, backlight assembly includes point source 142 and reflector plate, does not include light guide plate and diffusion sheet.
The present embodiment backlight coordinates display floater, it is possible to achieve the switching of narrow visual angle and wide viewing angle, and cost is low, it is easy to accomplish volume production.
This utility model embodiment also provides for a kind of display device, and it includes display floater and any one backlight above-mentioned.Described display device can show and switching between normal display at peep-proof, and cost is low.Described display device can be: any product with display function or the parts such as liquid crystal panel, Electronic Paper, mobile phone, panel computer, television set, display, notebook computer, DPF, navigator.
The above; it is only detailed description of the invention of the present utility model; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; the change that can readily occur in or replacement, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with scope of the claims.
Claims (10)
1. a changeable peep-proof display device, it is characterised in that including: the backlight that sets gradually, there is collimation or to the optical element of centre focus effect, changeable diffusion sheet and display floater；
Described backlight is for providing backlight for described display floater；
Described changeable diffusion sheet can switch between clear state and scattering states, and when being in clear state, described changeable diffusion sheet does not change the direction of propagation of described backlight；When being in scattering states, described backlight is scattered by described changeable diffusion sheet, it is thus achieved that wide viewing angle backlight.
2. changeable peep-proof display device according to claim 1, it is characterised in that described in have collimation or be Fresnel Lenses to the optical element of centre focus.
3. changeable peep-proof display device according to claim 2, it is characterised in that the bright finish of described Fresnel Lenses is relative with the exiting surface of described backlight, and described backlight includes light source, light guide plate and diffusion sheet；Or,
On described Fresnel Lenses, imprinting has concentrically ringed one side relative with the exiting surface of described backlight, and described backlight includes light source and reflector plate, does not include light guide plate and diffusion sheet.
4. changeable peep-proof display device according to claim 1, it is characterised in that
Described changeable diffusion sheet includes: the scattering film that PDLC or multistable state liquid srystal are made.
5. changeable peep-proof display device according to claim 1, it is characterised in that
The described viewing area that there is collimation or at least cover described display floater to the optical element of centre focus effect.
6. a backlight, it is adaptable to changeable peep-proof display device, it is characterised in that the backlight assembly that includes setting gradually, there is collimation or to the optical element of centre focus effect, changeable diffusion sheet；
Described backlight assembly at least includes light source, is used for providing backlight；
Described changeable diffusion sheet can switch between clear state and scattering states, and when being in clear state, described changeable diffusion sheet does not change the direction of propagation of described backlight；When being in scattering states, described backlight is scattered by described changeable diffusion sheet, it is thus achieved that wide viewing angle backlight.
7. backlight according to claim 6, it is characterised in that described in have collimation or be Fresnel Lenses to the optical element of centre focus.
8. backlight according to claim 7, it is characterised in that the bright finish of described Fresnel Lenses is relative with the exiting surface of described backlight assembly, and described backlight assembly includes light source, light guide plate and diffusion sheet；Or,
On described Fresnel Lenses, imprinting has concentrically ringed one side relative with the exiting surface of described backlight assembly, and described backlight assembly includes light source and reflector plate, does not include light guide plate and diffusion sheet.
9. backlight according to claim 6, it is characterised in that
Described changeable diffusion sheet includes: the scattering film that PDLC or multistable state liquid srystal are made.
10. a changeable peep-proof display device, it is characterised in that include the backlight described in display floater and any one of claim 6-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620157686.XU CN205405002U (en) | 2016-03-01 | 2016-03-01 | Changeable peep -proof display device and backlight |
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| CN201620157686.XU CN205405002U (en) | 2016-03-01 | 2016-03-01 | Changeable peep -proof display device and backlight |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105549238A (en) * | 2016-03-01 | 2016-05-04 | 京东方科技集团股份有限公司 | Switchable peep-proof display device and backlight |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105549238A (en) * | 2016-03-01 | 2016-05-04 | 京东方科技集团股份有限公司 | Switchable peep-proof display device and backlight |
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