CN209433052U - A kind of light guide plate, backlight module and display device - Google Patents
A kind of light guide plate, backlight module and display device Download PDFInfo
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- CN209433052U CN209433052U CN201920232339.2U CN201920232339U CN209433052U CN 209433052 U CN209433052 U CN 209433052U CN 201920232339 U CN201920232339 U CN 201920232339U CN 209433052 U CN209433052 U CN 209433052U
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- guide plate
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- 230000003287 optical effect Effects 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 5
- 201000009310 astigmatism Diseases 0.000 claims description 4
- 239000003595 mist Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 abstract description 10
- 230000000007 visual effect Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 239000005264 High molar mass liquid crystal Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 239000004973 liquid crystal related substance Substances 0.000 description 9
- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
The utility model discloses a kind of light guide plate, backlight module and display devices, the light guide plate includes the first light guide plate, the second light guide plate and control unit, the control unit is set between first light guide plate and second light guide plate, and first light guide plate and second light guide plate and control unit cooperation realize that individually light modulation or cooperation dim.First light guide plate is provided with multiple first light directing sites, and second light guide plate is provided with multiple second light directing sites, and the control unit is the automatically controlled glass of polymer liquid crystal.Light guide plate utilization rate provided by the utility model is high and display device can be made to achieve the effect that omnibearing visual angle peep-proof.
Description
Technical field
The utility model relates to technical field of liquid crystal display more particularly to a kind of light guide plate and display devices.
Background technique
Liquid crystal display (Liquid Crystal Display, LCD) it is small in size, thickness is thin, light-weight and low in energy consumption
Like it by user, with the development of display technology, the display devices such as mobile phone, computer have more and more extensive answer
With.In general, display device has biggish visual angle, the information of its display can be known per family positioned at the use of different perspectives.However
User wishes that information shown by display device can not be known by the other users of surrounding in some scenes, that is, wishes display
Part has peep-proof function.
Existing peep-proof display part, which is typically employed in outside display screen, increases peep-proof diaphragm, filters the light at big visual angle, only
Retain vertically with the light of display screen so that the user of big view position can not receive picture shown by display screen, but this
Kind peep-proof display part is due to additional increased peep-proof diaphragm, so that the thickness of whole display part increases, while peep-proof diaphragm
Also there is shielding action to the light of vertical angle of view, reduce the display brightness of vertical angle of view, to cause display device power consumption
Increase, in addition peep-proof diaphragm recycling rate of waterused is low, and price is also more expensive.In addition other existing peep-proof technologies are in liquid crystal
In display module, liquid crystal rotation angle is made to reach the visual certain angle of only narrow viewing angle, to reach the peep-proof effect at left and right visual angle
Fruit has limitation in peep-proof angle, has the defects of upper downwards angle of visibility is without peep-proof effect.
Utility model content
In view of problem above, the utility model provides a kind of light guide plate and has its display device, and the light guide plate utilizes
Rate is high and can achieve the effect of omnibearing visual angle peep-proof.To achieve the above object, the utility model adopts the following technical solutions:
A kind of light guide plate, wherein the light guide plate includes the first light guide plate, the second light guide plate and control unit, the control
Component processed is set between first light guide plate and second light guide plate, first light guide plate and second light guide plate
Realize that individually light modulation or cooperation dim with control unit cooperation.
Further, the light guide plate is integral type composite/laminate structure, and first light guide plate is the first optical waveguide layer, institute
Stating the second light guide plate is the second optical waveguide layer, and the control unit is automatically controlled preparative layer.
Further, the light guide plate is light guide plate assembly, and first light guide plate, the second light guide plate, control unit are
Individual components.
Further, first light guide plate is provided with multiple first light directing sites, and second light guide plate is provided with more
A second light directing site, the control unit are the automatically controlled glass of polymer liquid crystal.
Further, the multiple first light directing site and the multiple second light directing site can for hemispherical, spherical shape,
One kind of ellipse, cylindricality or vertebra shape.
Further, first light guide plate is peep-proof light guide plate, and second light guide plate is normality light guide plate.
Further, the multiple first light directing site is to receive light site, and the vertical light-emitting surface of control light projects upwards, institute
Stating multiple second light directing sites is astigmatism site, and control light scatters upwards.
Further, it is transparent state when the control unit is powered, is mist state when no power.
A kind of backlight module, including light source and light guide plate as described above.
A kind of display device, including display panel and backlight module as described above.
The beneficial effects of the utility model are: the light guide plate utilization rate of the utility model is high and display panel can be made to reach
The effect of omnibearing visual angle peep-proof.
Detailed description of the invention
Fig. 1 is that one light guide plate of the utility model embodiment is leaded light component structural schematic diagram；
Fig. 2 is that the design of one light directing site of the utility model embodiment calculates schematic diagram；
Fig. 3 is one light guide plate peep-proof pattern diagram of the utility model embodiment；
Fig. 4 is one light guide plate normal mode schematic diagram of the utility model embodiment.
Fig. 5 is that two light guide plate of the utility model embodiment is integral type composite/laminate structure schematic diagram；
In figure: 100- light guide plate, the first light guide plate of 10-, the second light guide plate of 11-, 12- control unit,
10 '-the first optical waveguide layers, 11 '-the second optical waveguide layers, 12 '-automatically controlled preparative layers, the first light directing site of 110-, 111- second
Light directing site, the first light-emitting surface of 101-, the first reflecting surface of 102-, the second light-emitting surface of 103-, the second reflecting surface of 104-, 13- light source,
14- light.
Specific embodiment
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.Each
In attached drawing, identical element, which is adopted, will be referred to by like reference numbers expression.For the sake of clarity, the various pieces in attached drawing are not pressed
Ratio is drawn.In addition, certain well known parts may be not shown in figure.Many spies of the utility model are described hereinafter
Fixed details, such as structure, material, size, treatment process and the technology of component, to be more clearly understood that the utility model.
But it just as the skilled person will understand, can not realize that this is practical new according to these specific details
Type.
It should be appreciated that being known as being located at another floor, another area when by a floor, a region when describing the structure of component
When domain " above " or " top ", can refer to above another layer, another region, or its with another layer, it is another
Also comprising other layers or region between a region.Also, if by part turnover, this layer, a region will be located at it is another
Layer, another region " following " or " lower section ".
Embodiment one
Fig. 1 is that the utility model light guide plate is leaded light component decomposition texture schematic diagram；
As shown in Figure 1, light guide plate 100 is light guide plate assembly, light guide plate 100 includes the first light guide plate 10, the second light guide plate
11, control unit 12, the first light guide plate 10, the second light guide plate 11, control unit 12 are individual components and superposition uses.The
One light guide plate 10 includes the first light-emitting surface 101 and the first reflecting surface 102, the first light-emitting surface 101 phase parallel with the first reflecting surface 102
To setting and it is located at 102 top of the first reflecting surface；Second light guide plate 11 includes the second light-emitting surface 103 and the second reflecting surface 104,
Second light-emitting surface 103 and the second reflecting surface 104 are oppositely arranged in parallel and are located at 104 top of the second reflecting surface.First light guide plate 10
It is layered on the second light guide plate 11 and the first reflecting surface 102 and the second light-emitting surface 103 is close to it is anti-that control unit 12 is set to first
It penetrates between face 102 and the second light-emitting surface 103, control unit 12 is contacted with the first reflecting surface 102 and the second light-emitting surface 103 respectively.
Control unit 12 controls the first light guide plate 10 and the second light guide plate 11 individually dims or cooperate light modulation.
First reflecting surface 102 of the first light guide plate 10 is provided with multiple first light directing sites 110, and the of the second light guide plate 11
Two reflectings surface 104 are provided with multiple second light directing sites 111, multiple first light directing sites 110 and multiple second light directing sites
111 can be one kind of hemispherical, spherical shape, ellipse, cylindricality or vertebra shape.In the present embodiment, with multiple first light directing sites
110 be conical, and to be illustrated for hemispherical, the utility model is not limited to this multiple second light directing sites 111, first
The true form of light directing site 110 and the second light directing site 111, which can according to need, to be selected, as long as guaranteeing multiple first
The guide-lighting effect of light directing site 110 and multiple second light directing sites 111 is not identical, i.e. the first light directing site 110 is to receive light
Site, the vertical light-emitting surface of control light project upwards, and the second light directing site 111 is astigmatism site, and control light scatters upwards.The
One light guide plate 10 is peep-proof light guide plate, and the second light guide plate 11 is normality light guide plate.
Fig. 2 is that the design of one light directing site of the utility model embodiment calculates schematic diagram；
As shown in Fig. 2, the first light directing site 110 is identical with the specific guide-lighting angle A Computing Principle of the second light directing site 111.
The present embodiment is illustrated by taking the specific guide-lighting angle A of the first light directing site 110 as an example, shown in following formula:
A=45-arc tan (h/2L)
H is the vertical range between the first reflecting surface and the first light-emitting surface that the first light guide plate is oppositely arranged；
L is level of the light between the vertical side that the reflection point on the first reflecting surface and the first light guide plate lean on close to sources
Vertical range.
The specific guide-lighting angle A variation relation formula of the first light directing site 110 is released to guarantee the first light guide plate peep-proof function net
The reflected light of point is vertical or near normal light-emitting surface, just has light transmission in the angular range only faced, and side is not up and down
Light transmission makes light guide plate have the function of peep-proof.First light directing site 110 is with peep-proof function site.Second light directing site
111 specific guide-lighting angle As are designed using the reflected light for guaranteeing 11 site of the second light guide plate to light-emitting surface as scattering state, and second is guide-lighting
Site 111 is astigmatism functions site.
Fig. 3 is one light guide plate peep-proof pattern diagram of the utility model embodiment；
Fig. 4 is one light guide plate normal mode schematic diagram of the utility model embodiment.
As shown in Figure 3, Figure 4, light source 13 is carried out by taking the automatically controlled glass of polymer liquid crystal as an example by LED light source, control unit 12
Illustrate, such as PDLC dimming glass film, the utility model are not limited to this.It is as follows that PDLC dimming glass film dims principle: in nothing
In the case of applied voltage, regular electric field cannot be formed between PDLC dimming glass film, the direction of optic axis of liquid crystal particle is random,
Present disordered state, the light effective refractive index of liquid crystal particle not with the index matching of polymer.Incident ray is scattered strongly,
PDLC dimming glass film is in opaque or translucent.It is applied with external voltage, the optical axis of liquid crystal particle dims glass perpendicular to PDLC
The arrangement of glass film surface, i.e., it is consistent with direction of an electric field.The optical index of liquid crystal particle matches substantially with the refractive index of polymer, without bright
Aobvious interface, constitutes a substantially homogeneous medium, so incident light will not scatter, PDLC dimming glass film is transparent.
Therefore, under the driving of extra electric field, PDLC has switch feature.
As shown in figure 3,12 no power of control unit, control unit 12 is in mist state when light guide plate 100 switches peep-proof function
It forms light and closes effect, the light 14 that light source 13 issues can not lead to after the scattering of the second light directing site 111 of the second light guide plate 11
Control unit 12 is crossed, at this point, the light 14 that light source 13 issues hangs down after the scattering of the first light directing site 110 of the first light guide plate 10
Straight first light-emitting surface 101 projects upwards.The angle light transmission only faced, visual angle is opaque up and down, forms peep-proof mode.Only
There is the receipts light site of the first light guide plate 10 to play a role, cooperation display device realizes full view peep-proof function, only faces visible
Picture.
As shown in figure 4, control unit 12 is powered when light guide plate switches normal mode, the transparent state of control unit 12 is
Light leads to state, and the light 14 that light source 13 issues passes through control unit after the scattering of the second light directing site 111 of the second light guide plate 11
Part 12 is again by the first scattering upwards of light-emitting surface 101, at this point, the light 14 that light source 13 issues is by the first of the first light guide plate 10
Vertical first light-emitting surface 101 of light directing site 110 projects upwards, and 11 cooperating of the first light guide plate 10 and the second light guide plate makes light
The light that source 13 issues face, visual angle has up and down to pass through, make display device that there is effect of wide angle.
Embodiment two
Fig. 5 is that two light guide plate of the utility model embodiment is integral type composite/laminate structure schematic diagram；
As shown in figure 5, two light guide plate of the present embodiment and light guide plate other structures, material, principle described in embodiment one are equal
Identical, difference is: light guide plate 100 be integral type composite/laminate structure, the first light guide plate 10 be the first optical waveguide layer 10 ', second
Light guide plate 11 is the second optical waveguide layer 11 ', and control unit 12 is automatically controlled preparative layer 12 '.First optical waveguide layer 10 ', automatically controlled preparative layer 12 ',
Two optical waveguide layers 11 ' stack gradually.First optical waveguide layer 10 is layered on the second optical waveguide layer 11 ' and the first reflecting surface 102 goes out with second
Smooth surface 103 is close to automatically controlled preparative layer 12 ' is set between the first reflecting surface 102 and the second light-emitting surface 103.
It includes light source 13 and above-mentioned light guide plate 100 that the utility model, which also provides a kind of backlight module,.
In addition, it includes display panel and above-mentioned backlight module that the utility model, which also provides a kind of display device,.
The beneficial effects of the utility model are: aobvious to control by light-emitting angle of the control light after light guide plate reflects
The display pattern of showing device has peep-proof mode, normal displaying mode.It avoids existing peep-proof display pattern and sticks on peep-proof film
The problem of leading to the increase of display device thickness.
More than, it is only the preferred embodiment of the utility model, limit in any form not is made to the utility model
System, although the utility model has been disclosed with preferred embodiment as above, is not intended to limit the utility model, any to be familiar with sheet
Technical professional is not departing within the scope of technical solutions of the utility model, when the technology contents work using the disclosure above
A little change or it is modified to the equivalent embodiment of equivalent variations out, but all without departing from the content of the technical scheme of the utility model, according to
According to the technical essence of the utility model any simple modification, equivalent change and modification to the above embodiments, still fall within
In the range of technical solutions of the utility model.
Claims (10)
1. a kind of light guide plate, which is characterized in that the light guide plate includes the first light guide plate, the second light guide plate and control unit, institute
It states control unit to be set between first light guide plate and second light guide plate, first light guide plate is led with described second
Tabula rasa and control unit cooperation realize that individually light modulation or cooperation dim.
2. light guide plate according to claim 1, which is characterized in that the light guide plate is integral type composite/laminate structure, institute
Stating the first light guide plate is the first optical waveguide layer, and second light guide plate is the second optical waveguide layer, and the control unit is automatically controlled preparative layer.
3. light guide plate according to claim 1, which is characterized in that the light guide plate is light guide plate assembly, and described first leads
Tabula rasa, the second light guide plate, control unit are individual components.
4. light guide plate according to claim 2 or 3, which is characterized in that first light guide plate is provided with multiple first and leads
Light site, second light guide plate are provided with multiple second light directing sites.
5. light guide plate according to claim 4, which is characterized in that the multiple first light directing site and the multiple second
Light directing site can be one kind of hemispherical, spherical shape, ellipse, cylindricality or vertebra shape.
6. light guide plate according to claim 3, which is characterized in that first light guide plate is peep-proof light guide plate, described the
Two light guide plates are normality light guide plate.
7. light guide plate according to claim 5, which is characterized in that the multiple first light directing site is to receive light site, control
The vertical light-emitting surface of light processed projects upwards, and the multiple second light directing site is astigmatism site, and control light scatters upwards.
8. light guide plate according to claim 5, which is characterized in that be transparent state, no power when the control unit is powered
When be mist state.
9. a kind of backlight module, which is characterized in that including light source and such as the described in any item light guide plates of claim 1-8.
10. a kind of display device, which is characterized in that including display panel and backlight module as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920232339.2U CN209433052U (en) | 2019-02-25 | 2019-02-25 | A kind of light guide plate, backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920232339.2U CN209433052U (en) | 2019-02-25 | 2019-02-25 | A kind of light guide plate, backlight module and display device |
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| CN209433052U true CN209433052U (en) | 2019-09-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114442374A (en) * | 2022-02-18 | 2022-05-06 | 深圳市日普科技有限公司 | Backlight module with diffraction optical element |
| TWI789633B (en) * | 2019-10-15 | 2023-01-11 | 美商雷亞有限公司 | Privacy-mode backlight, privacy display, and method |
| WO2023279224A1 (en) * | 2021-07-05 | 2023-01-12 | 瑞仪光电(苏州)有限公司 | Backlight module and display apparatus |
| WO2023178674A1 (en) * | 2022-03-25 | 2023-09-28 | 京东方科技集团股份有限公司 | Backlight module and display device |
| US12130463B2 (en) | 2022-03-25 | 2024-10-29 | Beijing Boe Display Technology Co., Ltd. | Backlight module and display device |
-
2019
- 2019-02-25 CN CN201920232339.2U patent/CN209433052U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI789633B (en) * | 2019-10-15 | 2023-01-11 | 美商雷亞有限公司 | Privacy-mode backlight, privacy display, and method |
| US11733556B2 (en) | 2019-10-15 | 2023-08-22 | Leia Inc. | Privacy-mode backlight, privacy display, and method |
| WO2023279224A1 (en) * | 2021-07-05 | 2023-01-12 | 瑞仪光电(苏州)有限公司 | Backlight module and display apparatus |
| CN114442374A (en) * | 2022-02-18 | 2022-05-06 | 深圳市日普科技有限公司 | Backlight module with diffraction optical element |
| WO2023178674A1 (en) * | 2022-03-25 | 2023-09-28 | 京东方科技集团股份有限公司 | Backlight module and display device |
| US12130463B2 (en) | 2022-03-25 | 2024-10-29 | Beijing Boe Display Technology Co., Ltd. | Backlight module and display device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215301 No. 1, Longteng Road, Kunshan Development Zone, Suzhou, Jiangsu Patentee after: InfoVision Optoelectronics(Kunshan)Co.,Ltd. Address before: 215301 No. 1, Longteng Road, Kunshan Development Zone, Suzhou, Jiangsu Patentee before: Infovision Optoelectronics (Kunshan) Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |