CN106195726A - Display device and backlight module thereof - Google Patents
Display device and backlight module thereof Download PDFInfo
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- CN106195726A CN106195726A CN201510315125.8A CN201510315125A CN106195726A CN 106195726 A CN106195726 A CN 106195726A CN 201510315125 A CN201510315125 A CN 201510315125A CN 106195726 A CN106195726 A CN 106195726A
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- light emitting
- emitting module
- light
- polarizer
- optical attenuator
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Abstract
The present invention proposes a kind of display device and backlight module (back light module) thereof.This backlight module includes: the first light emitting module (light emitting module), the second light emitting module and optical attenuator component (attenuator).Wherein, the first light emitting module has an exiting surface；Second light emitting module, is positioned at the opposite side of exiting surface；Optical attenuator component is between the first light emitting module and the second light emitting module, and includes that having the first light absorbs the first Polarizer of axle.
Description
Technical field
The invention relates to a kind of display device and backlight module (back light module) thereof, and particularly
It is related to display device and the backlight mould thereof of a kind of switchable 2D/3D (switchable 2D/3D) image
Block.
Background technology
In general, three dimensional display (three dimensional displays) can divide into plug-in spectacle
(stereoscopic type), with bore hole formula (autostereoscopic type).Wherein, including naked eye display
Portion arranges special optical element, such as parallax grating (parallax barrier) or column prism (lenticular
Lens) so that the images of left and right eyes of user can observe the image in display device with parallax, perception respectively
Form a stereoscopic image.In order to meet user needs viewing two dimension (two dimension, 2D) image simultaneously,
Switchable 2D/3D display device is suggested, and user can be shown at 3-dimensional image and bidimensional image two kinds
Show in pattern and change.
Typical case's switchable 2D/3D three-dimensional display apparatus, including a three-dimensional light module and one two
Dimension light emitting module.When showing 3-dimensional image, can be by two-dimensional light-emitting module closedown only by three-dimensional light module
Luminous.Make the light that three-dimensional light module is sent, through image display panel, such as display panels
(Liquid Crystal Display, LCD), produces and has an image of parallax and left and right by user respectively
Eye is received, and allows user perception 3-dimensional image.When showing bidimensional image, then can be by two-dimensional light-emitting module
Opening, three-dimensional light module can be closed or the crack auxiliary that opens supplements light, and light, through three-dimensional light module
And after image display panel, provide bidimensional image to user.
But when showing 3-dimensional image, the light sent due to a part of three-dimensional light module is the most direct
Through image display panel, but first directive two-dimensional light-emitting module, after two-dimensional light-emitting module reflects, enter
Enter the eyes of user, produce unexpected bright dark staggered folded stricture of vagina (Moire) and the shadow with display floater
As producing crosstalk (crosstalk), reduce the display quality of automatic holographic display device.
Therefore, still a need to provide display device and the backlight module thereof of a kind of advanced person, to improve known technology
Problem encountered.
Summary of the invention
One embodiment of the present of invention proposes a kind of backlight module, and this backlight module includes: the first light emitting module
(light emitting module), the second light emitting module and optical attenuator component (attenuator).Wherein, first
Light emitting module has an exiting surface；Second light emitting module is positioned at the opposite side of exiting surface；Optical attenuator component bag
Include and there is the first light absorb the first Polarizer of axle, and the first Polarizer is positioned at the first light emitting module and second
Between optical module.
An alternative embodiment of the invention relates to a kind of display device, and this display device includes display floater
And backlight module.Wherein, display floater, including lower Polarizer relative to each other and upper Polarizer, and point
Not there is the first mutually orthogonal polarizing axis and the second polarizing axis.Backlight module include the first light emitting module,
Two light emitting modules and optical attenuator component.Wherein, the first light emitting module has in the face of the one of lower Polarizer goes out light
Face；Second light emitting module is positioned at the opposite side of exiting surface；Optical attenuator component is positioned at the first light emitting module and
Between two light emitting modules, and include that having the first light absorbs one first Polarizer of axle.Wherein the first light absorbs
Axle essence is parallel with the first polarizing axis of lower Polarizer.
Another embodiment of the present invention relates to a kind of backlight module, and this backlight module includes that first is luminous
Module, the second light emitting module, reflector plate and optical attenuator component.Wherein, the first light emitting module has one and goes out
Bright finish；Reflector plate is positioned at the opposite side of exiting surface；Second light emitting module is positioned at the first light emitting module and reflection
Between sheet；Optical attenuator component includes a Polarizer and a polarizer.Polarizer has a light and absorbs axle,
And between the second light emitting module and reflector plate；Polarizer is between Polarizer and reflector plate.
Yet another embodiment of the present invention relates to a kind of display device, and this display device includes display floater
And backlight module.Wherein, backlight module include the first light emitting module, reflector plate, the second light emitting module with
And optical attenuator component.First light emitting module has the exiting surface in the face of display floater；Reflector plate is positioned at light
The opposite side in face；Second light emitting module is between the first light emitting module and reflector plate；Optical attenuator component bag
Include Polarizer and polarizer.Polarizer has a light and absorbs axle, and is positioned at the second light emitting module and reflection
Between sheet.Polarizer is between Polarizer and reflector plate.
According to above-mentioned, embodiments of the invention are to provide the display dress of a kind of two-dimensional/three-dimensional switchable display modes
Put and backlight module.In some embodiments of the invention, the backlight module of this display device at least wraps
Include the first light emitting module and the second light emitting module being arranged in parallel with each other, can be by the first light emitting module and second
The switching of light emitting module makes for providing the most two-dimentional and three-dimensional two kinds of display patterns.Wherein, first is luminous
Module has an exiting surface, and configures one at the opposite side of exiting surface and comprise at least one absorption polarisation
The optical attenuator component of version, prevents from being sent by the first light emitting module and a part for directive the second light emitting module
Light, is reflected by the second light emitting module, and is produced unexpected bright dark staggered folded stricture of vagina, and then
Prevent this some light and sent by the first light emitting module and directly through the light generation crosstalk of exiting surface
Phenomenon.Display quality when display device uses the first light emitting module can be improved, switch to without impact
Display quality during another display pattern.
Accompanying drawing explanation
For the above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing to this
Bright detailed description of the invention elaborates, wherein:
Figure 1A is the structural profile signal according to a kind of backlight module depicted in one embodiment of the invention
Figure；
Figure 1B is the partial structurtes amplification profile schematic diagram according to a kind of optical attenuator component depicted in Figure 1A；
Fig. 2 A is the structural profile signal of a kind of backlight module depicted according to another embodiment of the present invention
Figure；
Fig. 2 B is the partial structurtes amplification profile schematic diagram according to a kind of optical attenuator component depicted in Fig. 2 A；
Fig. 3 A is the structural profile signal of a kind of backlight module depicted according to still another embodiment of the invention
Figure；
Fig. 3 B is the partial structurtes amplification profile schematic diagram according to a kind of optical attenuator component depicted in Fig. 3 A；
Fig. 4 A is the structural profile signal according to a kind of backlight module depicted in one more embodiment of the present invention
Figure；
Fig. 4 B is that the structural profile according to a kind of backlight module depicted in the still another embodiment of the present invention shows
It is intended to；
Fig. 4 C is the partial structurtes amplification profile according to a kind of optical attenuator component depicted in Fig. 4 A and Fig. 4 B
Schematic diagram；
Fig. 5 is the structural profile schematic diagram according to a kind of display device depicted in one embodiment of the invention；
And
Fig. 6 is the structural profile signal of a kind of display device depicted according to another embodiment of the present invention
Figure.
In figure, element numbers is described as follows:
50: display device 51: display floater
51a: liquid crystal layer 51b: lower Polarizer
51c: upper Polarizer 60: display device
100: backlight module 101: the first light emitting module
101a: exiting surface 102: the second light emitting module
103: optical attenuator component 104: light guide plate
104a: incidence surface 104b: incidence surface
104c: the first the 104c: the second side, side
105: luminescence unit 106: light-guide device
107: light guide plate 107a: incidence surface
107b: the three the 107c: the four side, side
108: luminescence unit 109: reflector plate
110: the first Polarizer the 110a: the first substrate layers
110b: the second substrate layer 110c: polarizing layer
112: diffuser plate 113: brightness enhancement film
114: dual brightness enhancement film 200: backlight module
203: optical attenuator component 210: the second Polarizer
210a: the three substrate layer the 210b: the four substrate layer
210c: polyvinyl alcohol layer 211: adhesion coating
300: backlight module 303: optical attenuator component
312: blooming piece 400A: backlight module
400B: backlight module 403: optical attenuator component
412: blooming piece 504: surface treatments
600: backlight module 603: optical attenuator component
609: reflector plate 610: Polarizer
611: polarizer the X1: the first light absorbs axle
X2: the second light absorbs axle X3: light and absorbs axle
T1, T3, T4: light penetrating shaft the P1: the first polarizing axis
P2: the second polarizing axis
L1, L1a, L1b, L1b1, L1b2, L2, L2a, L2b, L2c: light
Detailed description of the invention
The present invention provides a kind of backlight module with two light emitting modules, and applies the display of this backlight module
Device, can improve the anti-image cross-interference issue caused because of luminous reflectance between this two light emitting module, reach
Improve the effect of display device quality.In order to the above embodiment of the present invention and other purposes, feature and excellent
Point can become apparent, several preferred embodiments cited below particularly, and coordinates accompanying drawing to elaborate.
But must be noted that these specific case study on implementation and methods, be not limited to the present invention.This
Invention still can use other features, element, method and parameter to be carried out.The proposition of preferred embodiment,
It is only the technical characteristic illustrating the present invention, is not limited to the claim of the present invention.This skill
Art field has usually intellectual, by can be according to the description of description below, in the essence without departing from the present invention
In the range of god, make impartial modification and change.Among different embodiments with accompanying drawing, identical element, will
Represented with identical component symbol.
Refer to Figure 1A, Figure 1A is according to a kind of backlight module 100 depicted in one embodiment of the invention
Structural profile schematic diagram.This backlight module 100 includes: first light emitting module the 101, second light emitting module
102 and optical attenuator component 103.In some embodiments of the invention, the first light emitting module 101 is positioned at
Above second light emitting module 102, optical attenuator component 103 is positioned at the first light emitting module 101 and the second luminous mould
Between block 102.In detail, be mainly used in the first light emitting module 101 of three dimensional display be one have concurrently luminescence and
The structure of printing opacity, has an exiting surface 101a, the first light emitting module 101 light source the light L1 sent
It is outwards to derive through exiting surface 101a；The second light emitting module 102 being mainly used in two dimension display is then positioned at the
The opposite side of the exiting surface 101a of one light emitting module 101, is sent by the second light emitting module 102 light source
After light L2 is via the second light emitting module 102 itself, it is then passed through the first light emitting module 101 by first
The exiting surface 101a of optical module 101 outwards derives.Exiting surface 101a is to represent that this backlight module 100 goes out light
End face after all, for the present embodiment, is closest in image in the first light emitting module optical element
Display floater and the surface of observer.
Among some embodiments of the present invention, the first light emitting module 101 can include a light guide plate 104,
At least one luminescence unit 105 and multiple light-guide device 106.Wherein, light guide plate 104 has at least one
Individual incidence surface 104a or 104b and relative to each other first side 104c and second side
104c.The material of light guide plate 104 can be glass, polyacids methyl ester (Polymethylmethacrylate, PMMA)
Or other possible light transmissive materials (but being not limited).Luminescence unit 105 adjoins incidence surface 104a or 104b,
The present embodiment luminescence unit 105 adjoins incidence surface 104b, in other embodiments, and luminescence unit 105 quantity
Also can be two and adjoin incidence surface 104a and incidence surface 104b respectively.Multiple light-guide devices 106 are arranged at
In at least one of one side 104c and the second side 104d.
Among the present embodiment, the first light emitting module 101 is a side-light type light emitting module, has multiple luminescence
Unit 105 is adjacent to incidence surface 104a and 104b parallel with the thickness direction of light guide plate 104.Vertically lead
First side 104c of the thickness direction of tabula rasa 104 can as the exiting surface 101a of the first light emitting module 101,
First side 104c is that this backlight module 100 is closest in display floater and the surface of observer, is also that this is led
Tabula rasa 104 upper surface.Light-guide device 106 is positioned on the second side 104d relative for side 104c with first,
Namely it is positioned at the lower surface of this light guide plate 104.But among other embodiments, light-guide device 106 also may be used
Only it is configured on the first side 104c or is configured at simultaneously on the first side 104c and the second side 104d.
Among some embodiments of the present invention, light-guide device 106 can be the prominent of rule or irregular alignment
Go out portion (protrusions), raised line, groove (slots), opening (openings), alcove (recesses).It addition,
The section shape of each light guide (being observed by parallel first side 104c and the second 104c direction, side),
Can be respectively arc, polygon (triangle, square, rectangle, trapezoidal, regular polygon can be comprised) or
Irregular shape, can be used to destroy the total reflection effect of light guide plate 104, makes luminous energy by reflection (reflection)
Or scattering (scattering) goes out light towards exiting surface 101a (i.e. the first side 104c of light guide plate 104).This is led
Optical element 106, by the distribution pattern of striated, reaches to form region and goes out different (the generation clear zone or dark of light intensity
District) palisade go out light pattern (barrier pattern), make the most of light L1a sent by luminescence unit 105
After entering light guide plate 104, by the guiding of these light-guide devices 106, with bright dark staggered shape
Formula irradiates display floater, to present 3-dimensional image.
Second light emitting module 102 can include a light guide plate 107, at least one luminescence unit 108 and
Reflector plate 109.Wherein, light guide plate 107 is positioned at reflector plate 109 and the light guide plate of the first light emitting module 101
Between 104, and have at least one incidence surface 107a and relative to each other the 3rd side 107b and
One the 4th side 107c.Luminescence unit 108 adjoins incidence surface 107a.3rd side of light guide plate 107
Second side 104d of the light guide plate 104 of 107b mapping the first light emitting module 101；Reflector plate 109 mapping
4th side 107c of light guide plate 107.Reflector plate 109 material is white scattering material.By luminescence unit 108
The light L2 sent is after entering light guide plate 107, and the light L2a of a part is directly through first
Optical module 101, the light L2b of another part then first reflects via reflector plate 109, is then passed through second luminous
Module 102 and the first light emitting module 101, by the exiting surface 101a of the first light emitting module 101, (i.e. first is luminous
First side 104c of the light guide plate 104 of module 101) derive, so as to forming an area source.
Optical attenuator component 103 is between the first light emitting module 101 and the second light emitting module 102.At this
In some bright embodiments, optical attenuator component 103 including at least an absorption line Polarizer, such as first
Polarizer 110, and the first Polarizer 110 have first light absorb axle X1.Among the present embodiment, light decay
Subtracting element 103 can be to be made up of single first Polarizer 110.Refer to Figure 1B, Figure 1B is basis
The partial structurtes amplification profile schematic diagram of a kind of optical attenuator component 103 depicted in Figure 1A.First Polarizer
110 include the first substrate layer 110a, the second substrate layer 110b and are located in the first substrate layer 110a and
Polarizing layer 110c (polyvinyl alcohol Poly-Vinyl Alcohol, PVA) between two substrate layer 110b, polarisation
Layer 110c can form the merit with absorptivity anisotropy (anisotropic) by stretching and absorbing material implantation
Can, reach the result of polarization.Wherein, the first substrate layer 110a and the material of the second substrate layer 110b are constituted
Material can be identical or different；And constitute the first substrate layer 110a and the material of the second substrate layer 110b, permissible
It is selected from by Triafol T (Triacetate Cellulose, TAC), polyacids methyl ester, polyethylene benzene two
The group that formic acid esters (Polyethylene Terephthalate, PET) and above-mentioned combination in any are formed.
And it should be noted that in order to the light not affecting the first light emitting module 101 is led by exiting surface 101a
Go out, among some embodiments of the present invention, deposit between optical attenuator component 103 and the first light emitting module 101
There iing certain space length.In other words, optical attenuator component 103 and the first light emitting module 101 can't be straight
Contact.The most in the present embodiment, the first Polarizer 110 and the first luminous mould of optical attenuator component 103
There is certain clearance space (air layer) between the light-guide device 106 of block 101, make the two directly to connect
Touch.
It addition, for the production reliability (reliability) increasing optical attenuator component, and prevent the first Polarizer
110 produce warpage (waving) after assembling, and among some embodiments of the present invention, optical attenuator component also may be used
To be the multiple structure being made up of at least two Polarizer, and the light absorption axle of these Polarizers is to put down each other
OK.Such as, refer to Fig. 2 A, Fig. 2 A is a kind of backlight depicted according to another embodiment of the present invention
The structural profile schematic diagram of module 200.The structure of backlight module 200 generally with the back of the body depicted in Figure 1A
Optical module 100 is similar to, and difference is only that optical attenuator component 203 except including aforesaid first Polarizer 110,
The most at least include second Polarizer 210, be positioned at the second light emitting module 102 and the first Polarizer 110 it
Between the top of the second Polarizer 210 (i.e. first Polarizer 110 be positioned at).And second Polarizer 210 have one
Second light absorbs axle X2, and the first light of parallel first Polarizer 110 of essence absorbs axle X1.The present invention's
In another embodiment, the second Polarizer 210 can be located at and the first light emitting module 101 and the first Polarizer 110
Between the top of the first Polarizer 110 (i.e. second Polarizer 210 be positioned at).
Refer to Fig. 2 B, Fig. 2 B is the local knot according to a kind of optical attenuator component 203 depicted in Fig. 2 A
Structure amplification profile schematic diagram.In the present embodiment, optical attenuator component 203 is pair of lamina structure, inclined by first
Tabula rasa the 110, second Polarizer 210 and between the first Polarizer 110 and the second Polarizer 210
Adhesion coating 211 is constituted.Wherein, the second Polarizer 210 includes the 3rd substrate layer 210a, the 4th substrate layer
210b and be located in the polyvinyl alcohol layer 210c between the 3rd substrate layer 210a and the 4th substrate layer 210b.
The material constituting the 3rd substrate layer 210a and the 4th substrate layer 210b can be identical or different.And constitute the 3rd
Substrate layer 210a and the material of the 4th substrate layer 210b, can be selected from by Triafol T, polyacids
The group that methyl ester, polyethylene terephthalate and above-mentioned combination in any are formed.Adhesion coating 211
Material can be printing opacity pressure-sensing glue (Pressure Sensitive Adhesive, PSA) or other possible printing opacities
Sticky material.Owing to the stress warp direction of first Polarizer the 110, second Polarizer 210 on the contrary can be mutual
Compensate the result of deformation, therefore there are two Polarizers the optical attenuator component 203 of patch is more only had single polarisation
Optical attenuator component 103 deformation quantity of plate is little.
Among some embodiments of the present invention, optical attenuator component can also further include at least one blooming
Sheet, between the first Polarizer 110 and the second Polarizer 210.Such as, refer to Fig. 3 A and Fig. 3 B,
Fig. 3 A is the structural profile signal of a kind of backlight module 300 depicted according to still another embodiment of the invention
Figure.Fig. 3 B is the partial structurtes amplification profile signal according to a kind of optical attenuator component 303 depicted in Fig. 3 A
Figure.Wherein the structure of backlight module 300 is generally similar with the backlight module 200 depicted in Fig. 2 A, poor
Be not only that optical attenuator component 303 also includes one between the first Polarizer 110 and the second Polarizer 210
Individual by diffuser plate (diffuser), brightness enhancement film (Brightness Enhancement Film, BEF), reflective partially
Light brightness enhancement film (Dual Brightness Enhancement Film, DBEF) or above-mentioned combination in any are formed
Blooming piece 312, and respectively by adhesion coating 211 and the first Polarizer 110 and the second Polarizer 210
In conjunction with.
It should be noted that the blooming piece being arranged between the first Polarizer 110 and the second Polarizer 210
If 312 dual brightness enhancement films, its light penetrating shaft T3 palpus essence is inclined with the first Polarizer 110 and second
It is parallel that first light of tabula rasa 210 absorbs axle X1 and the second light absorption axle X2.
Among some embodiments of the present invention, optical attenuator component can also further include at least one blooming
Sheet, be positioned at both the first light emitting module 101 and the second light emitting module 102 one of them with optical attenuator component it
Between.Such as, refer to Fig. 4 A to Fig. 4 C, Fig. 4 A according to depicted in one more embodiment of the present invention
A kind of structural profile schematic diagram of backlight module 400A.Fig. 4 B is the still another embodiment institute according to the present invention
The structural profile schematic diagram of a kind of backlight module 400B illustrated.Fig. 4 C is according to Fig. 4 A and Fig. 4 B institute
The partial structurtes amplification profile schematic diagram of a kind of optical attenuator component 403 illustrated.Wherein backlight module 400A
Structure generally similar with the backlight module 200 depicted in Fig. 2 A, difference is only that optical attenuator component 403
Except including the first Polarizer 110, the most at least include that one is increased by diffuser plate, brightness enhancement film, reflecting type polarizing
The blooming piece 412 that bright film or above-mentioned combination in any are formed, is positioned at and the second light emitting module 102 and
Between one Polarizer 110 (i.e. blooming piece 412 is configured at the top of the first Polarizer 110).Backlight module
The structure of 400B is also similar with backlight module 400A, and difference is only that the configuration mode of optical attenuator component 403
Different from backlight module 400A.In backlight module 400B, the blooming piece 412 of optical attenuator component 403
Be in the first light emitting module 101 and and the first Polarizer 110 between (i.e. blooming piece 412 is configured at first
The lower section of Polarizer 110).
It addition, for the light extraction efficiency increasing by the second light emitting module 102, preferably can be at the second light emitting module 102
And configure between optical attenuator component 103,203 and 303 at least one by diffuser plate 112, brightness enhancement film 113,
The blooming piece 112 that dual brightness enhancement film 114 or above-mentioned combination in any are formed is (such as Figure 1A, figure
Depicted in 2A, Fig. 3 A, Fig. 4 A and Fig. 4 B).In some embodiments of the invention, it is also possible to first
Configure at least one blooming piece between light emitting module 101 and optical attenuator component 103,203 and 303 (not paint
Show).And it should be noted that be arranged between the first light emitting module 101 and the second light emitting module 102 anti-
Penetrating formula brightness enhancement film 114 its light penetrating shaft T1 can essence and the first Polarizer 110 and the second Polarizer 210
The first light absorb axle X1 and the second light to absorb axle X2 parallel.If blooming piece 412 reflecting type polarizing increases
Bright film person, its light penetrating shaft T4 also can essence matter put down with the first light absorption axle X1 and the second light absorption axle X2
OK.
If by above-mentioned backlight module, such as, as a example by backlight module 200, integrated with display floater,
I.e. may make up a display device 50 with Two-dimensional/threimageensional imageensional switchable.Refer to Fig. 5, Fig. 5 is root
Structural profile schematic diagram according to a kind of display device 50 depicted in one embodiment of the invention.Display device
50 include the backlight module 200 depicted in display floater 51 and Fig. 2 A.Display floater 51 can be one
Plant display panels or other suitable display mediums.In this example it is shown that panel 51 can be
A kind of display panels, including liquid crystal layer 51a and the substrate that lays respectively at the upper and lower both sides of liquid crystal layer 51a
(not illustrating), and lower Polarizer 51b relative to each other and upper Polarizer 51c.Lower Polarizer 51b and upper polarisation
Plate 51c is respectively provided with the first mutually orthogonal polarizing axis P1 and the second polarizing axis P2.First light emitting module 101
The lower Polarizer 51b of exiting surface 101a (i.e. the first side 104c of light guide plate) mapping display floater 51；And
First light of the first Polarizer 110 and the second Polarizer 210 absorbs axle X1 and the second light absorb axle X2 with under
The first polarizing axis P1 essence of Polarizer 51b is parallel.
When display device 50 3-dimensional image to be shown, can be by the luminescence unit 108 of the second light emitting module 102
Close, and only lean on the luminescence unit 105 of the first light emitting module 101 to provide light.By luminescence unit 105 institute
The most of light L1a sent, after entering light guide plate 104, by the guiding of light-guide device 106,
With bright dark staggered form by exiting surface 101a (i.e. first side of light guide plate of the first light emitting module 101
Face 104c) derive, directive display floater 51, one part of pixel (not illustrating) in display floater 51 is exported
Left-eye images be sent to the left eye of user, and by another part pixel (not illustrating) on display floater 51
The right-eye image exported is sent to the right eye of user so that two of user can receive respectively to be had
The different images of binocular parallax (binocular parallax), and then allow user be not required to wear auxiliary eyeglasses with regard to energy
With bore hole perception stereoscopic image.
Another part light L1b sent by luminescence unit 105, after entering light guide plate 104, by leading
Second side 104d of tabula rasa 104 derives, directive optical attenuator component 203.Owing to light L1b is non-polarization
First light of light, the most parallel first Polarizer 110 and the second Polarizer 210 absorbs axle X1 and the
Two light absorb the polar biased light L1b1 of axle X2 could pass through optical attenuator component 203.Such as, in the present embodiment,
First Polarizer 110 of attenuating elements 203 and the light transmittance essence of the second Polarizer 210 between 40% to
Between 50%.Therefore, by the polar biased light of optical attenuator component 203 directive the second light emitting module 102 the most again
L1b1, its light intensity can decay about 50%.And the polar biased light L1b1 of directive the second light emitting module 102,
Through diffuser plate 112, brightness enhancement film 113, dual brightness enhancement film 114 and the second light emitting module 102
Light guide plate 107 and reflector plate 109 reflection with scattering after, major part light L1b1 polar biased state
Change can be produced.Therefore, when directive optical attenuator component 203 again, only part is the most parallel first inclined
First light of tabula rasa 110 and the second Polarizer 210 absorbs axle X1 and the polar biased light of the second light absorption axle X2
L1b2 can pass optical attenuator component 203.In other words light intensity can decay about 50% the most again.So,
The configuration of optical attenuator component 203 can be greatly decreased the light L1b sent by luminescence unit 105, by
Two light emitting modules 102 reflect the intensity of the light L1b2 through exiting surface 101a again.Prevent the most straight further
Connect and produced non-on display floater 51 by the light L1b of the exiting surface 101a outgoing of the first light emitting module 101
Intended bright dark staggered image, and produce crosstalk with the stereoscopic image directly through exiting surface 101a,
Reach to promote the effect of the stereoscopic image display quality of display device 50.
In some embodiments of the invention, preferably can also be at optical attenuator component 203 in the face of the first luminous mould
On the exiting surface 101a of block 101, (upper surface of the i.e. first substrate layer 110a) carries out a surface process, so as to
Exiting surface 101a is formed at least one surface treatments 504.This surface treatments 504 is permissible
Including at least one jut, at least one raised line, at least one groove, at least one opening, at least one depressed part or
Above-mentioned combination in any.By the surface treatments 504 scattering to light L1b, directive second can be prevented
The light L1b of light emitting module 102 is directly reflected by optical attenuator component 203, and exists through exiting surface 101a
Unexpected bright dark staggered image is produced, to reduce the generation of folded stricture of vagina on display floater 51.At this
In other embodiments of invention, can also be optionally at the second light emitting module faced by optical attenuator component 203
The surface (lower surface of the i.e. the 4th substrate layer 210b) of the 102 above-mentioned surface treatments 504 of upper formation (is not painted
Show).
When display device 50 bidimensional image to be shown, can be by the luminescence unit 105 of the first light emitting module 101
Close, and only lean on the luminescence unit 108 of the second light emitting module 102 to provide light.By luminescence unit 108
The light L2 gone out entering after light guide plate 107, most light L2a directly through diffuser plate 112,
Brightness enhancement film 113, dual brightness enhancement film 114, optical attenuator component 203 and the first light emitting module 101；Separately
The light L2b of a part then first reflects via reflector plate 109, is then passed through the second light emitting module 102, diffusion
Plate 112, brightness enhancement film 113, dual brightness enhancement film 114, optical attenuator component 203 and the first light emitting module
101, then derived by the exiting surface 101a (the i.e. first side 104c) of the first light emitting module 101, form one
There is the polar biased light L2c of single polarization state, the plane pixel (not illustrating) in display floater 51 exported
Image is sent to the eyes of user.
Due to, the first light of the first Polarizer 110 and the second Polarizer 210 absorbs axle X1 and the second light is inhaled
The the first polarizing axis P1 essence receiving axle X2 and lower Polarizer 51b is parallel.Therefore, almost all of (essence
Between 90% to 98%) polar biased light L2c can pass lower Polarizer 51b.In other words, optical attenuator component
The configuration of 203, the essence light extraction efficiency for the second light emitting module 102 affects little.It addition, in order to mend
The light extraction efficiency of foot the second light emitting module 102, in some embodiments of the invention, in display device 50
During display plane image, also at least some of luminescence unit 105 of the first light emitting module 101 can be opened.
Refer to Fig. 6, Fig. 6 is a kind of display device 60 depicted according to another embodiment of the present invention
Structural profile schematic diagram.Owing to display device 60 has similar knot with the display device 50 depicted in Fig. 5
Structure, therefore identical component structure repeating no more.The difference of display device 60 and display device 50 is light
The structure of attenuating elements 603 is different with configuration.In this example it is shown that device 60 includes display
Panel 51 and backlight module 600.Backlight module 600 include the first light emitting module 101, reflector plate 609,
Second light emitting module 102 and optical attenuator component 603.First light emitting module 101 has an exiting surface 101a,
In the face of display floater 51；Reflector plate 609 is positioned at the opposite side of exiting surface 101a.Second light emitting module 102,
Between the first light emitting module 101 and reflector plate 609.Optical attenuator component 603 include Polarizer 610 with
And polarizer 611.Polarizer 610 has light and absorbs axle X6, and is positioned at the second light emitting module 102 with anti-
Penetrate between sheet 609.Polarizer 611 is between Polarizer 610 and reflector plate 609.The present invention's
In some embodiments, a kind of mirror reflection sheet of reflector plate 609.Polarizer 611 can be four points
One of (λ/4) ripple plate.
When display device 60 3-dimensional image to be shown, can be by the luminescence unit 108 of the second light emitting module 102
Close, the luminescence unit 108 of the second light emitting module 102 can be closed, and only sending out by the first light emitting module
Light unit 105 provides light.The most of light L1a sent by luminescence unit 105, is entering leaded light
After plate 104, by the guiding of light-guide device 106, with bright dark staggered form by the first luminous mould
The exiting surface 101a (i.e. the first side 104c of light guide plate) of block 101 derives, directive display floater 51, will be aobvious
Show that the left-eye images that in panel 51, one part of pixel (not illustrating) is exported is sent to the left eye of user, and will
The right-eye image that on display floater 51, another part pixel (not illustrating) is exported is sent to the right eye of user,
Two that make user can receive the different images with binocular parallax respectively, and then allow user be not required to
Wearing auxiliary eyeglasses just can be with bore hole perception stereoscopic image.
Another part light L1b sent by luminescence unit 105 is after entering light guide plate 104, then by leading
Second side 104d of tabula rasa 104 derives, and directive the second light emitting module 102 also passes the second light emitting module
102 and attenuating elements 603.Owing to light L1b is non-polarization light, therefore, only parallel polarizing plates 610
Light absorb axle X6 could pass through optical attenuator component 603 directive polarizer 611.In the present embodiment, logical
Crossing the polar biased light L1b1 after optical attenuator component 603, its light intensity can decay about 50%.And directive phase contrast
The polar biased light L1b1 of plate 611, can produce the phase place of quarter-wave (λ/4) after by polarizer 611
Difference.After polar biased light L1b1 is by reflector plate 609 mirror reflection, because polarization state changes meeting by Polarizer
610 stop and cannot again pass through the second light emitting module 102, diffuser plate 112, brightness enhancement film 113, reflective
Brightness enhancement film 114 and the first light emitting module 101, derived by exiting surface 101a.So will not be at display surface
Produce unexpected bright dark staggered image on plate 51, can prevent the stereoscopic image of display device 60 from producing
The phenomenon of raw image crosstalk, reaches to promote the effect of the stereoscopic image display quality of display device 60.
When display device 60 bidimensional image to be shown, can be by the luminescence unit 108 of the first light emitting module 101
Close, and only lean on the luminescence unit 105 of the second light emitting module to provide light.Sent by luminescence unit 105
Light L2 entering after light guide plate 107, most light L2a directly through, diffuser plate 112, increase
Bright film 113, dual brightness enhancement film 114 and the first light emitting module 101, by the picture in display floater 51
The bidimensional image that element (not illustrating) is exported is sent to the eyes of user.By luminescence unit 105 send another
The light L2b of a part after entering light guide plate 107, then initially passes through optical attenuator component 603 via reflection
After sheet 609 mirror reflection by and be no longer pass through the second light emitting module 102 and the first light emitting module 101, by going out
Bright finish 101a derives.In some embodiments of the invention, take to supply the light of the second light emitting module 102
Go out rate, when display device 50 shows bidimensional image, can at least some of by the first light emitting module 101
Luminescence unit 105 is opened.
According to above-mentioned, embodiments of the invention be to provide a kind of two-dimensional/three-dimensional switchable type display device and
Backlight module.In some embodiments of the invention, the backlight module of this display device at least includes each other
First light emitting module arranged in parallel and the second light emitting module, can be by the luminous mould of the first light emitting module and second
The switching of block makes for providing at least two kinds of display patterns.Wherein, the first light emitting module has an exiting surface,
And at opposite side one optical attenuator component comprising at least one absorption polarisation version of configuration of exiting surface, come
Prevent from being sent by the first light emitting module and a part of light of directive the second light emitting module, luminous by second
The reflection of module, and produce unexpected bright dark staggered folded stricture of vagina, so prevent this some light with by
First light emitting module sent and directly through exiting surface light produce crosstalk phenomenon.Display dress can be improved
Put display quality when using the first light emitting module, showing when switching to the second display pattern without impact
Show quality.
Although the present invention discloses as above with preferred embodiment, so it is not limited to the present invention, Ren Heben
Skilled person, without departing from the spirit and scope of the present invention, when making a little amendment and perfect,
Therefore protection scope of the present invention is when with being as the criterion that claims are defined.
Claims (20)
1. a backlight module (back light module), including:
One first light emitting module (light emitting module), has an exiting surface；
One second light emitting module, is positioned at the opposite side of this exiting surface；And
One optical attenuator component (attenuator), between this first light emitting module and this second light emitting module；
Wherein, this optical attenuator component includes one first Polarizer, and this first Polarizer has one first light and absorbs
Axle.
2. backlight module as claimed in claim 1, it is characterised in that this first light emitting module includes:
One light guide plate, has at least one incidence surface and one first side relative to each other and one second side；
At least one luminescence unit, this incidence surface adjacent；And
Multiple light-guide devices, are arranged at least one of this first side and this second side.
3. backlight module as claimed in claim 1, it is characterised in that this first Polarizer, including one the
One substrate layer, one second substrate layer and be located between this first substrate layer and this second substrate layer one inclined
Photosphere；The material of this first substrate layer and this second substrate layer is Triafol T (Triacetate
Cellulose, TAC), polyacids methyl ester (Polymethylmethacrylate, PMMA), polyethylene is to benzene two
The group that formic acid esters (Polyethylene Terephthalate, PET) and above-mentioned combination in any are formed；
This polarizing layer material is polyvinyl alcohol (Poly-Vinyl Alcohol, PVA).
4. backlight module as claimed in claim 1, it is characterised in that this optical attenuator component has a surface
Process structure, be positioned at this optical attenuator component on a surface of this first light emitting module；This surface processes knot
Structure is selected from by least one jut (protrusions), at least one raised line, at least one groove (slots), extremely
The family that a few opening (openings), at least one depressed part (recesses) and above-mentioned combination in any are formed
Group.
5. backlight module as claimed in claim 1, it is characterised in that this optical attenuator component also includes having
One second light absorbs one second Polarizer of axle, is positioned at this first light emitting module and this both second light emitting module
Between one of them and this first Polarizer；And this second light absorbs axle and is substantially parallel to the absorption of this first light
Axle.
6. backlight module as claimed in claim 1, it is characterised in that this optical attenuator component also includes at least
One blooming piece, one of them is first inclined with this to be positioned at this first light emitting module and this both second light emitting module
Between tabula rasa；This at least one blooming piece is selected from by a diffuser plate, a brightness enhancement film, a reflecting type polarizing
The group that brightness enhancement film and above-mentioned combination in any are formed.
7. backlight module as claimed in claim 6, it is characterised in that this at least one blooming piece is anti-
Penetrate formula brightness enhancement film, and there is a smooth penetrating shaft be substantially parallel to this first light and absorb axle.
8. a display device, including:
One display floater, including Polarizer on Polarizer once and relative to each other, and is respectively provided with mutually
One first orthogonal polarizing axis and one second polarizing axis；And
One backlight module, including:
One first light emitting module, has an exiting surface, in the face of this lower Polarizer；
One second light emitting module, is positioned at the opposite side of this exiting surface；And
One optical attenuator component, between this first light emitting module and this second light emitting module, including one
First Polarizer, has one first light and absorbs axle, and essence is flat with this first polarizing axis of this lower Polarizer
OK.
9. display device as claimed in claim 8, it is characterised in that this first light emitting module includes:
One light guide plate, has at least one incidence surface and one first side relative to each other and one second side；
At least one luminescence unit, this incidence surface adjacent；And
Multiple light-guide devices, are arranged at least one of this first side and this second side.
10. display device as claimed in claim 8, it is characterised in that this first Polarizer includes one the
One substrate layer, one second substrate layer and be located between this first substrate layer and this second substrate layer one inclined
Photosphere；The material of this first substrate layer and this second substrate layer is Triafol T, polyacids methyl ester, poly-second
The group that alkene terephthalate and above-mentioned combination in any are formed；The material of this polarizing layer is poly-second
Enol.
11. display devices as claimed in claim 8, it is characterised in that this optical attenuator component has a table
Face processes structure, is positioned at this optical attenuator component on a surface of this first light emitting module；This surface processes
Structure is selected from by least one jut, at least one raised line, at least one groove, at least one opening, at least
The group that one depressed part and above-mentioned combination in any are formed.
12. display devices as claimed in claim 8, it is characterised in that this optical attenuator component also includes tool
There is one second light to absorb one second Polarizer of axle, be positioned at this first light emitting module and this second light emitting module two
Between person one of them and this first Polarizer；And this second light absorbs axle and is substantially parallel to the absorption of this first light
Axle.
13. display devices as claimed in claim 8, it is characterised in that this optical attenuator component also include to
A few blooming piece, be positioned at this first light emitting module and this both second light emitting module one of them with this first
Between Polarizer；This at least one blooming piece be selected from by a diffuser plate, a brightness enhancement film, one reflective partially
The group that light brightness enhancement film and above-mentioned combination in any are formed.
14. display devices as claimed in claim 13, it is characterised in that this at least one blooming piece is one
Dual brightness enhancement film, and have a smooth penetrating shaft be substantially parallel to this first light absorb axle.
15. 1 kinds of backlight modules, including:
One first light emitting module, has an exiting surface；
One reflector plate, is positioned at the opposite side of this exiting surface；
One second light emitting module, between this first light emitting module and this reflector plate；And
One optical attenuator component, including:
One Polarizer, has a light and absorbs axle, and between this second light emitting module and this reflector plate；
And
One polarizer, between this Polarizer and this reflector plate.
16. backlight modules as claimed in claim 15, it is characterised in that this first light emitting module includes:
One light guide plate, has at least one incidence surface and one first side relative to each other and one second side；
At least one luminescence unit, this incidence surface adjacent；And
Multiple light-guide devices, are arranged at least one of this first side and this second side.
17. backlight modules as claimed in claim 15, further include at least one blooming piece, be positioned at this first
Between light emitting module and this second light emitting module；This at least one blooming piece be selected from by a diffuser plate, one
The group that brightness enhancement film, a dual brightness enhancement film and above-mentioned combination in any are formed.
18. 1 kinds of display devices, including:
One display floater；And
One backlight module, including:
One first light emitting module, has an exiting surface, in the face of this display floater；
One reflector plate, is positioned at the opposite side of this exiting surface；
One second light emitting module, between this first light emitting module and this reflector plate；And
One optical attenuator component, including:
One Polarizer, has a light and absorbs axle, and be positioned at this second light emitting module and this reflector plate
Between；And
One polarizer, between this Polarizer and this reflector plate.
19. display devices as claimed in claim 18, it is characterised in that this first light emitting module includes:
One light guide plate, has at least one incidence surface and one first side relative to each other and one second side；
At least one luminescence unit, this incidence surface adjacent；And
Multiple light-guide devices, are arranged at least one of this first side and this second side.
20. display devices as claimed in claim 18, also include at least one blooming piece, be positioned at this first
Between light emitting module and this second light emitting module；This at least one blooming piece be selected from by a diffuser plate, one
The group that brightness enhancement film, a dual brightness enhancement film and above-mentioned combination in any are formed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201462092853P | 2014-12-17 | 2014-12-17 | |
| US62/092,853 | 2014-12-17 |
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| Publication Number | Publication Date |
|---|---|
| CN106195726A true CN106195726A (en) | 2016-12-07 |
| CN106195726B CN106195726B (en) | 2018-05-22 |
Family
ID=56984696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510315125.8A Active CN106195726B (en) | 2014-12-17 | 2015-06-10 | Display device and its backlight module |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106195726B (en) |
| TW (1) | TWI575254B (en) |
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| CN107399138A (en) * | 2017-07-05 | 2017-11-28 | 中航华东光电有限公司 | The optical film group of light and thin type |
| CN110609413A (en) * | 2018-06-14 | 2019-12-24 | 夏普株式会社 | Illumination device and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3728941A4 (en) * | 2017-12-18 | 2021-07-28 | LEIA Inc. | Mode-switchable backlight, display, and method |
| CN111090191B (en) | 2018-10-24 | 2022-10-04 | 中强光电股份有限公司 | Light source module and double-screen display device |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201624057A (en) | 2016-07-01 |
| CN106195726B (en) | 2018-05-22 |
| TWI575254B (en) | 2017-03-21 |
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