CN106151960B - Backlight module and its application - Google Patents
Backlight module and its application Download PDFInfo
- Publication number
- CN106151960B CN106151960B CN201510133001.8A CN201510133001A CN106151960B CN 106151960 B CN106151960 B CN 106151960B CN 201510133001 A CN201510133001 A CN 201510133001A CN 106151960 B CN106151960 B CN 106151960B
- Authority
- CN
- China
- Prior art keywords
- several
- substrate
- waveguides
- backlight module
- coloured light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Planar Illumination Modules (AREA)
Abstract
A kind of backlight module (backlight module) includes: at least one light source, several waveguides (wave guide) and several periodic micro structures.Wherein light source can provide several beam coloured light.These Waveguides are coupled to these coloured light, make accordingly to transmit in a waveguide per a branch of coloured light.These periodic micro structure spaced-apart relations are in one of these waveguides, for extracting these coloured light from these waveguides.
Description
Technical field
The invention relates to a kind of backlight module (backlight module) and using the aobvious of this backlight module
Showing device, and in particular to a kind of backlight module with waveguide (wave guide) and using this backlight module
Display device.
Background technique
Current display device, the mostly trend development towards power saving, slimming and high brightness (high luminance).So
And, it is known that display device, such as the liquid crystal display of Fig. 1 is please referred to, after light L1 is emitted by backlight module 100, it is necessary to
Across a variety of optical diaphragms, such as light guide plate 101, polaroid (polarizer) 102, liquid crystal layer 103, colored filter
(color filter) 104, analysis mating plate (analyer) 105 and surface reflection piece (surface reflection) 106 can be by
It is shown.For light after absorbing layer by layer, it is at a fairly low that light draws efficiency (extraction efficiency), opposite
Suitable power consumption, brightness are also difficult to be promoted.
In order to solve the problems, such as this one, industry proposes a kind of micro- comprising single or double prism microstructure using several at present
Type prismatic brightness film (Prism Collimation Film, PCF) 202, color separation diaphragm (prism beam splitter) 203
Diaphragm (beam steering prisms) 206 is aligned with 204 and beam splitting, the light L2 being emitted by backlight module 200 is straight
Light splitting is connect, then is directed at the sub-pixel (sub-pixel) of liquid crystal display panel 205 and is shown (as illustrated in Figure 2).Due to omitting
The configuration of colored filter can promote the utilization rate of light.However, the light that omission colored filter can be promoted draws efficiency still
There is its limit, and be divided using prism microstructure, it is necessary to occupy comparable thickness space, be unfavorable for the slim of display
Change.And prism structure is very high to its wavelength selectivity, so the emergent light angle around injection can be highly relevant with wavelength, this is special
Point be easy to cause the crosstalk of high order diffraction light between different color light, reduces the color saturation of display panel.
Therefore, still a need to a kind of advanced backlight module and the display device using this backlight module are provided, with
Improve known technology problem encountered.
Summary of the invention
Of the invention one includes: at least one light source, several waveguides and number towards a kind of backlight module is related to
A periodic micro structure.Wherein light source can provide several beam coloured light.These Waveguides are coupled to these coloured light, make per a branch of coloured light
Accordingly transmitted in a waveguide.These periodic micro structure spaced-apart relations are used to general in one of these waveguides
These coloured light are extracted from these waveguides.
Of the invention another is towards relating to a kind of display device, including backlight module and connects with backlight module optocoupler
Display panel.Wherein this backlight module includes: at least one light source, several waveguides and several periodic micro structures.Wherein
Light source can provide several beam coloured light.These Waveguides are coupled to these coloured light, make every a branch of coloured light accordingly in a waveguide
Transmission.These periodic micro structure spaced-apart relations are used to these coloured light from these waveguides in one of these waveguides
In extract.Wherein, display panel includes one first transparent substrate, one second transparent substrate, a thin film transistor (TFT) (Thin
Film Transistor, TFT) layer and a liquid crystal layer.First transparent substrate have a first surface and with first surface phase
Pair a second surface, wherein advance in direction of the coloured light being drawn out from first surface to second surface.Second transparent substrate
In face of second surface.Tft layer, between second surface and the second transparent substrate.Liquid crystal layer is located at thin film transistor (TFT)
Between layer and the second transparent substrate.
The light as provided by backlight module has been distinguished into different colours before not yet entering display panel
Coloured light can be precisely directed to the sub-picture element of display panel in addition having specific directive by light beam derived from polarization.Cause
This, can not only omit the setting of colored filter, polaroid and other optical diaphragms for being used to be divided, greatly improve display
Light draw efficiency, achieve the effect that power saving；And more can because of the reduction of optical diaphragm, while reach save cost of material and
The purpose for being thinned display.
Detailed description of the invention
In order to be clearer and more comprehensible to the above embodiment of the present invention and other objects, features and advantages, spy lift it is several compared with
Good embodiment, and cooperate appended attached drawing, it is described in detail below:
Fig. 1 is a kind of part-structure diagrammatic cross-section of liquid crystal display according to depicted in known technology；
Fig. 2 is the part-structure diagrammatic cross-section of the another kind liquid crystal display according to depicted in known technology；
Fig. 3 is a kind of part-structure perspective view of backlight module depicted in an embodiment according to the present invention；
Fig. 4 is a kind of part-structure perspective view of backlight module depicted according to another embodiment of the present invention；
Fig. 5 is the part-structure diagrammatic cross-section along waveguide depicted in the tangent line S4 in Fig. 4；
Fig. 6 is the part-structure perspective view of backlight module depicted according to still another embodiment of the invention；
Fig. 7 is the part-structure diagrammatic cross-section of a cycle micro-structure depicted in tangent line S6 along Fig. 6；
Fig. 8 is the part-structure perspective view of backlight module depicted in another embodiment according to the present invention；
Fig. 9 is the structural profile illustration according to display device depicted in one embodiment of the invention；
Figure 10 is to be painted partially to show picture drawing as provided by Fig. 9 display device；
Figure 11 is the part-structure diagrammatic cross-section of display device depicted according to another embodiment of the present invention；
Figure 12 is the part-structure diagrammatic cross-section of display device depicted according to still another embodiment of the invention；And
Figure 13 is the part-structure diagrammatic cross-section of display device depicted in another embodiment according to the present invention.
Symbol description:
90: display device 11: display device
12: display device 13: display device
100: backlight module 101: light guide plate
102: polaroid 103: liquid crystal layer
104: colored filter 105: analysis mating plate
110: display panel 111: colored filter
112: polaroid 120: display panel
121: colored filter 122: polaroid
130: 131: the first transparent substrate of display panel
The first surface of 131a: the first transparent substrate
The second surface of 131b: the first transparent substrate
133: backlight module 200: backlight module
202: micro-lens brightness enhancement film 203: color separation diaphragm
204: color separation diaphragm 206: beam splitting aligns diaphragm
205: liquid crystal display panel 300: backlight module
301: light source 304: multiple-mode interfence element
302: waveguide 400: backlight module
401a: blue light-emitting diode light source
401b: red light-emitting diode light source
401c: green light LED light source
402a: waveguide 402b: waveguide
402c: waveguide 402a1: transport part
402a2: one ridge 402a3: switching part
403: periodic micro structure 404a: multiple-mode interfence element
404b: multiple-mode interfence element 404c: multiple-mode interfence element
405: substrate 405a: lower substrate
405b: upper substrate 600: backlight module
602: waveguide 602a: one ridge
603: periodic micro structure 603a: strip projected parts portion
604: protective layer
605: substrate 606: metal layer
606a: layer on surface of metal 800: backlight module
802: waveguide 802a: core
805: substrate 900: display panel
900a: 901: the first transparent substrate of sub-pixel
The first surface of 901a: the first transparent substrate
The second surface of 901b: the first transparent substrate
902: the second transparent substrates 903: tft layer
904: liquid crystal layer 905: analysis mating plate
906: barrier layer 906a: opening
L1: light L2: light
L4: light S4: tangent line
S6: tangent line
S6: tangent line
R: feux rouges G: green light
B: blue light: the non-straight angle
The periodic intervals distance of D wire grid construction
H: the thickness in strip projected parts portion
The spacing in the adjacent strip projected parts portion P bis-
H: the thickness of metal layer
Specific embodiment
The present invention is to provide a kind of display device of this backlight module of the backlight module with waveguide and application, can be with
While improvement display device light draws efficiency, achievees the effect that the use for reducing optical diaphragm and save electric power.In turn
Achieve the purpose that save cost of material and is thinned display.In order to the above embodiment of the present invention and other purposes,
Feature and advantage can be clearer and more comprehensible, and several preferred embodiments are cited below particularly, and appended attached drawing is cooperated to elaborate.
But it must be noted that these specific case study on implementation and method, be not intended to limit the invention.The present invention still may be used
It is implemented using other features, element, method and parameter.The it is proposed of preferred embodiment is only of the invention to illustrate
Technical characteristic, the claim being not intended to limit the invention.Have usually intellectual in the technical field, it can be according to following
The description of specification is not departing from scope of the invention, makees impartial modification and variation.In different embodiments and attached drawing
Among, identical element will be indicated with identical component symbol.
Referring to figure 3., Fig. 3 is a kind of part-structure of backlight module 300 depicted in an embodiment according to the present invention
Perspective view.Wherein, backlight module 300 includes that at least one can provide the coloured light of several different colours (for example, feux rouges R, green light
G, and blue light B) light source 301, several waveguides 302 and several periodic micro structures 303.Each waveguide 302 and light source
301 optocouplers connect, and transmit each coloured light accordingly in a wherein waveguide 302.
In some embodiments of the invention, light source 301 can be a white light source, a monochromatic light source or
Composite light source made of as combined by the light source of several different color lights.For example, light source 301 is one white among the present embodiment
Light-emitting diode light source.Wherein, light source 301 by multiple-mode interfence (Multi-module interference) element 304 with
Multiple 302 optocouplers of waveguide connect, and each corresponding waveguide 302 provides a kind of coloured light of different colours respectively.
In detail, one end of white light emitting diode light source 301 connects with 304 optocoupler of multiple-mode interfence element, the energy of light source
There can be feux rouges among each waveguide 302 via multiple-mode interfence element or other optical elements by the equipartition of energy to multiple waveguides
R, the frequency content of green light G, blue light B, and the periodic micro structure 303 in waveguide 302 can be set according to the coloured light of different frequency
Meter, different coloured light can be drawn out from waveguide 302 via periodic micro structure 303, and is controlled its polarization and polarized
The polarization light source of the red, green, blue of highly collimated property is presented in state.
In another example among the present embodiment, light source 301 also can be used it is several can issue different color light respectively shine two
Pole pipe light source replaces.Referring to figure 4., Fig. 4 is a kind of backlight module 400 depicted according to another embodiment of the present invention
Part-structure perspective view.400 structure of backlight module depicted in Fig. 4 is substantially similar with backlight module 300 depicted in Fig. 3, poor
It is not that the light source of backlight module 400 includes at least blue light-emitting diode light source 401a, red light-emitting diode light source 401b
With green light LED light source 401c, the coloured light of three kinds of different colours can be provided respectively.
In addition in the present embodiment, backlight module 400 also includes several multiple-mode interfence element 404a, 404b and 404c.Its
In, each multiple-mode interfence element 404a, 404b and 404c correspond to the LED source that optocoupler connects a different color light, example
Such as blue light-emitting diode light source 401a, red light-emitting diode light source 401b and green light LED light source 401c；Again will
Identical coloured light distributes to waveguide 402a, 402b and 402c that optocoupler corresponding with multiple-mode interfence element 404a, 404b and 404c connects.
Similarly, each multiple-mode interfence element 404a, 404b or 404c can determine to distribute to according to the design requirement of backlight module 400
The coloured light type (feux rouges R, green light G or blue light B) of different waveguide 402a, 402b and 402c and the intensity of the coloured light.
In another embodiment of the invention, monochromatic light source can also be used to provide the coloured light of three kinds of different colours,
E.g. by blue light caused by blue light-emitting diode light source as the exciting light of the phosphor powder (phosphor) of other colors.
And feux rouges and green light are then generated via blue light deexcitation phosphor powder (phosphor).
Referring to figure 5., Fig. 5 is the part-structure diagrammatic cross-section along waveguide 402a depicted in the tangent line S4 in Fig. 4.
Among the present embodiment, waveguide 402a includes the transmission being located among substrate 405 (including lower substrate 405a and upper substrate 405b)
Portion 402a1, one ridge 402a2 and switching part 402a3.Wherein, transport part 402a1 is located among lower substrate 405a, one end with
Multiple-mode interfence element 404a and blue light-emitting diode 401a optocoupler connect.One ridge 402a2 is located on upper substrate 405b.Turn
Socket part 402a3 is by the other end optical coupling of one ridge 402a2 and transport part 402a1.
Among some embodiments of the present invention, waveguide 402a be can be by the material of light-permeable, such as glass, transparent modeling
Change material (such as polymethyl methacrylate (Poly methyl methacrylate, PMMA)), semiconductor (such as silicon), pottery
The combination of porcelain or above-mentioned material is constituted.Substrate 405 (include lower substrate 405a and upper substrate 405b) is also can be (but unlimited
In) material of light-permeable, wherein the refractive index (refractive index) of waveguide 402a is greater than or equal to the refraction of substrate 405
Rate.The light L4 as provided by multiple-mode interfence element 404a can be transmitted to transport part 402a1 via one end of transport part 402a1
The other end, then via switching part 402a3 in a manner of being totally reflected, light L4 is transmitted to one ridge 402a2.Later, by position
It is subject to polarization in several periodic micro structures 403 on the surface one ridge 402a2, and is extracted from waveguide 402a.
It is worth noting that, though waveguide 402a, 402b and 402c depicted in Fig. 4 is all the straight line knot being parallel to each other
Structure, but among some embodiments of the present invention, waveguide 402a, 402b and 402c may include curve or meander line structure, and
There can be branched structure according to the design requirement of backlight module 400.
The explanation of periodic micro structure please refers to Fig. 6, and Fig. 6 is backlight mould depicted according to still another embodiment of the invention
The part-structure perspective view of block 600.For the sake of for a clear description, light source, multimode is omitted in backlight module 600 depicted in Fig. 6
Interference element and other peripheral elements are only painted several waveguides 602 being formed on substrate 605 and several periodic micro structures
603.In Fig. 6 the present embodiment, each waveguide 602 is the one ridge for being convexly equipped in substrate 605, two adjacent waveguides 602 it
Between to be formed with one compared with the surface 602a of one ridge be low channel-shaped portion, several periodic micro structures 603 are then formed in each
On the surface 602a of the one ridge of waveguide 602.
Referring to Fig. 7, the part-structure that Fig. 7 is a cycle micro-structure 603 depicted in tangent line S6 along Fig. 6 cuts open
Face schematic diagram.In some embodiments of the invention, a cycle micro-structure 603 is by being formed in each one ridge table
Several wiregratings (grating) with periodic intervals distance (period) D on the 602a of face are constituted.Wire grid construction includes warp
By, such as nanometer embossing (Nano imprinting lithography, NIL), roll-to-roll process (Roll-to-Roll
Process/R2R), lithographic (photolithography) or other suitable techniques, on the surface of the one ridge of waveguide 602
The strip projected parts portion 603a of several shapes flat each other is formed on 602a, in this way, the surface of those strip projected parts portions 603a with should
The surface 602a of one ridge forms the convex-concave surface of an alternating concave and protrusion under the fixed cycle.
Wherein, each strip projected parts portion 603a all accompanies an angle for being greater than zero with the extending direction of waveguide 602, preferably
It is 90 degree.The shape of strip projected parts portion 603a may include straight line, curve, broken line, dotted line or combinations of the above.The technical field
Middle tool usually intellectual, all can be according to the light beam that is intended to carry out polarization via periodic micro structure 603 and extract not
With polarization state or optical field distribution, to select the shape and size of strip lug boss 603a.
Fig. 7 is please referred to again, and among the present embodiment, periodic micro structure 603 is by the extension side of several vertical waveguides 602
To linear strip projected parts portion 603a constituted.Wherein, the material for constituting strip lug boss 603a can be the modeling of light-permeable
Change material, such as polyethylene terephthalate (Polyethylene Terephthalate, PET).It will be appreciated, however, that
Constitute strip lug boss 603a material be not limited thereto, any refractive index be greater than or equal to substrate 605 condition can be saturating
Luminescent material can be adopted to constitute strip lug boss 603a.
The periodic intervals distance D of wire grid construction is to be started by a starting point of strip projected parts portion 603a, until adjacent strip
The distance between another starting point of lug boss 603a.In some embodiments of the invention, the periodic intervals of wire grid construction
Distance D essence is between 150 nanometers to 800 nanometers.The thickness H of strip projected parts portion 603a, by the surface of 602 one ridge of waveguide
602a is started, and substantially greater than 100 nanometers (nm).
In addition in this embodiment, the wire grid construction of each periodic micro structure 603 in same waveguide 602
In, spacing (pitch) essence of two adjacent strip projected parts portion 603a is equal；And between 150 nanometers to 300 nanometers.But
It is worth noting that, in some implementations of the invention, each periodic micro structure 603 in same waveguide 602
In wire grid construction, the spacing P of two adjacent strip projected parts portion 603a can be unequal.
For example, the uniformity for the beam energy being drawn out in order to balance is located at same in one embodiment of this invention
In the grid structure of same or different a periodic micro structure 603 in waveguide 602, between two adjacent strip projected parts portion 603a
Away from P, gradually become smaller along the direction far from light source.In another example in another embodiment of the invention, being located at same waveguide 602
In the wire grid construction of upper different periodic micro structures 603, the spacing P of two adjacent strip projected parts portion 603a be can also be different, and
Therebetween there are a special ratios.In addition, in the grid structure of each periodic micro structure 603 in different waveguide 602,
Spacing P between two adjacent strip projected parts portion 603a, can also be according to be intended to polarization and the different polarization of the light beam extracted
State or optical field distribution are subject to modulation.
In some embodiments of the invention, periodic micro structure 603 further includes a metal layer 606, is covered in periodicity
On the surface 602a of the one ridge of the strip projected parts portion 603a and waveguide 602 of micro-structure 603, make in each waveguide 602
The coloured light (feux rouges R, green light G or blue light B) of the different colours of transmission, excitating surface plasmon generates after penetrating metallic slit
Resonance, and formed and be limited in the dilatational wave or longitudinal wave (Longitudinal Wave) of 606 surface 606a of metal layer, then from
The shooting angle of 606 surface 606a of vertical metal layer extracts.The material of metal layer 606 is preferably aluminium (Al), silver-colored (Ag), gold
(Au) or other suitable metal or alloy.The thickness h of metal layer 606 is preferably between 30 nanometers to 100 nanometers.
Fig. 8 is please referred to, Fig. 8 is that the part-structure of backlight module 800 depicted in another embodiment according to the present invention is saturating
View.Wherein the structure of backlight module 800 is similar to 600 structure of backlight module depicted in Fig. 6, and difference is only that backlight module
800 several waveguides 802 are to be embedded among the substrate 805 of glass material, and constitute the material of these waveguides 802 and constitute base
The material of material 805 is identical, but has different refractive index therebetween.
Among some embodiments of the present invention, waveguide 802 is via Myocardial revascularization bylaser (laser beam writing) work
The waveguide process of skill or other ion exchanging types, using wavelength be substantially glass baseplate 805 2 times of energy gap (band gap) or
3 times of ultrafast laser light is irradiated substrate 805, uses and forms several among substrate 805, the core of strip
802a, to transmit the coloured light of different colours.Among the present embodiment, the refractive index of core 802a is substantially greater than glass baseplate
805 refractive index.
Referring again to Fig. 6 (and Fig. 8), since the different color light extracted via periodic micro structure 603 is (feux rouges R, green
Light G or blue light B) light beam, the shooting angle of the surface 602a (805 surface of substrate) with vertical waveguide 602 (802) one ridge.
If backlight module 600 and 800 can be made to provide the colourama with light splitting function several suitably arrangements of periodic micro structure 603
Beam array, it is corresponding with the pixel array of display panel, and it is integrally formed a display device, known colorized optical filtering can be omitted
The setting of piece, polaroid and other optical diaphragms for being used to be divided, the light for greatly improving display draw efficiency, reach power saving
Effect.
Fig. 9 is please referred to, Fig. 9 is shown according to the part-structure section of display device 90 depicted in one embodiment of the invention
It is intended to.Display panel 900 of the display device 90 by backlight module 600 and positioned at the side of backlight module 600 is formed, should
Display panel 900 connects with 600 optocoupler of backlight module.Wherein, display panel 900 includes that the first transparent substrate 901, second is transparent
Substrate 902, tft layer 903, liquid crystal layer 904 and analysis mating plate 905, and be not configured colored filter, polaroid and
Other are used to the optical diaphragm being divided.Backlight module 600 includes substrate 605, waveguide 602, periodic micro structure 603 and covering
The protective layer 604 of periodic micro structure 603.Each periodic micro structure 603 of backlight module 600 is directed at display panel 900
A sub-pixel 900a, use provide a kind of different color light of each sub-pixel 900a (feux rouges R, green light G or blue light B), into
And the display picture (please referring to Figure 10) constituted.
In detail, the first transparent substrate 901 has first surface 901a and second table opposite with first surface 901a
Face 901b, and the coloured light being drawn is advanced from first surface 901a to the direction of second surface 901b.Second transparent substrate 902,
In face of second surface 901b.Tft layer 903, between second surface 901b and the second transparent substrate 902.Liquid crystal layer
904 between tft layer 903 and the second transparent substrate 902, via thin-film transistor circuit, can define several times
Pixel 900a.Second transparent substrate 902 is located between liquid crystal layer 904 and analysis mating plate 905.
Figure 10 is please referred to, is to be painted partially to show picture drawing as provided by Fig. 9 display device.In reality of the invention
It applies in example, a barrier layer 906 can be preferably set on the second transparent substrate 902, used on shielding film transistor layer 903
Thin-film transistor circuit, and each sub-pixel unit (sub-pixels) of display panel 90 is surrounded, and in each picture
An opening 906a is formed above plain unit 900a, is accordingly aligned and exposes a cycle micro-structure 603.
In some embodiments of the invention, barrier layer 906 preferably can be for example black matrix" (Black Matrix,
BM), it is exposed to each outer periodic micro structure 603 via barrier layer opening 906a, has and is open much smaller than barrier layer
The size of 906a.Such as the major axis dimension of periodic micro structure 603 extended along the Y direction, about barrier layer opening 906a long
1/3 to the 1/5 of shaft size.The minor axis dimension of periodic micro structure 603 extended along the X direction, about barrier layer opening 906a
1/2 to the 1/3 of minor axis dimension.Among the present embodiment, the major axis dimension essence of periodic micro structure 603 is between 5 microns (μm)
To between 20 microns；The minor axis dimension essence of periodic micro structure 603 is between 3 microns (μm) to 5 microns.
In order to promote the display quality of display device, can also be configured in display panel colored filter, polaroid and
Other are used to the optical diaphragm being divided.Such as Figure 11 and Figure 12 are please referred to, Figure 11 is to be drawn according to another embodiment of the present invention
The part-structure diagrammatic cross-section for the display device 11 shown.The structure of display device 11 substantially with display device depicted in Fig. 9
90 is similar, the difference is that the display panel 110 of display device 110 also includes colored filter 111 and polaroid 112.Wherein,
Colored filter 111 is between the second transparent substrate 902 and liquid crystal layer 904.Polaroid 112 is located at the first transparent substrate 901
First surface 901a and backlight module 600 between.
Figure 12 is the part-structure diagrammatic cross-section of display device 12 depicted according to still another embodiment of the invention.It is aobvious
The structure of showing device 12 is substantially similar with display device 9 depicted in Fig. 9, the difference is that the display panel 120 of display device 12
It also include colored filter 121 and polaroid 122, and display device 12 is using backlight module 800 depicted in the 8th, rather than
Backlight module 600 depicted in 6th.Wherein, colored filter 121 is between first surface 901a and backlight module 600, but
It is not limited thereto, such as colored filter 121 may also be between the second transparent substrate 902 and liquid crystal layer 904.Polaroid
122 are located between the first surface 901a and colored filter 121 of the first transparent substrate 901.
In order to further be thinned display device, the glass in display panel is can be set in waveguide and periodic micro structure
Among substrate.Such as Figure 13 is please referred to, Figure 13 is the part of display device 13 depicted in another embodiment according to the present invention
Structural profile illustration.Compared with the display device 12 depicted in Figure 12, backlight module 133 used by display device 13 is omitted
The substrate 805 of 800 glass material of backlight module, but it is transparent via the first of Myocardial revascularization bylaser technique irradiation display panel 130
Substrate 131 is used and forms the waveguide similar with waveguide 802 of several structures in the first glass substrate 131, to transmit different face
The coloured light (feux rouges R, green light G or blue light B) of color.
Among the present embodiment, tft layer 903 is formed in the of the first glass substrate 131 of display panel 130
Two surface 131b, liquid crystal layer 904 is between second surface 131b and colored filter 121.Periodic micro structure 603 is set to
On the first surface 131a of first glass substrate 131, and the spacing of the wire grid construction via modulation periodic micro structure 603, with
The polarization state or optical field distribution for changing different colours coloured light (feux rouges R, green light G or blue light B), make by the light beam of polarization, by wave
It leads 802 core 802a to extract, and towards the outgoing of the direction of the second surface 131b of the first glass substrate 131.
According to above-mentioned, the embodiment of the present invention is to provide a kind of backlight module with waveguide and applies this backlight mould
The display device of block.Wherein this backlight module includes: at least one light source that can provide several beam coloured light, respectively with several waveguides
Optocoupler connects, and transmits each coloured light accordingly in a wherein waveguide.And it passes through since the periodicity in each waveguide is micro-
The coloured light of different colours is subject to polarization and extracted from different waveguides respectively by structure.
The light as provided by backlight module has been distinguished into different colours before not yet entering display panel
Coloured light can be precisely directed to the sub-picture element of display panel in addition having specific polarization state by the light beam that polarization extracts,
And reduce the light energy loss stopped by black matrix" (BM).Therefore, can not only omit colored filter, polaroid and its
The setting for the optical diaphragm that he is used to be divided, the light for greatly improving display draw efficiency, achieve the effect that power saving；And it more can be because
For the reduction of optical diaphragm, while achieving the purpose that save cost of material and being thinned display.
Although the present invention has been disclosed as a preferred embodiment, however, it is not to limit the invention, any technology neck
Have usually intellectual in domain, without departing from the spirit and scope of the present invention, when can make some changes and embellishment, therefore this
The protection scope of invention is subject to view those as defined in claim.
Claims (8)
1. a kind of backlight module characterized by comprising
An at least light source provides several beam coloured light；
Several waveguides, optocoupler connects several beam coloured light respectively, and each of several beam coloured light is accordingly in several waveguides
Transmission in one, wherein each of several waveguides includes a transport part among a substrate, an one ridge and one
Switching part；The substrate includes substrate on substrate and one；The transport part is located among the lower substrate, and the ridged portion is on this
On substrate；One end of the transport part and the one optocoupler of several beam coloured light connect；The switching part is by the one ridge and the transmission
The other end optical coupling in portion；And
Several periodic micro structures, for spaced-apart relation on one of several waveguides, which will
The coloured light transmitted in one of several waveguides is extracted from several waveguides.
2. backlight module as described in claim 1, which is characterized in that several periodic micro structures are located at the table of the one ridge
On face.
3. backlight module as described in claim 1, which is characterized in that one of several periodic micro structures include:
One wire grid construction is formed on a surface of one of several waveguides；And
One metal layer is covered on the wire grid construction.
4. a kind of display device characterized by comprising
One backlight module, comprising:
An at least light source provides several beam coloured light；
Several waveguides, optocoupler connects several beam coloured light respectively, and each of several beam coloured light is accordingly in several waveguides
One of in transmit, wherein each of several waveguides include a transport part among the substrate, an one ridge and
One switching part；The substrate includes substrate on substrate and one；The transport part is located among the lower substrate, and the ridged portion is in this
On upper substrate；One end of the transport part and the one optocoupler of several beam coloured light connect；The switching part is by the one ridge and the biography
The other end optical coupling in defeated portion；And
Several periodic micro structures, for spaced-apart relation on one of several waveguides, which will
The coloured light transmitted in one of several waveguides is extracted from several waveguides；And
One display panel connects with the backlight module optocoupler, comprising:
One first transparent substrate has a first surface and a second surface opposite with the first surface, wherein be drawn
It advances in direction of the several beam coloured light out from the first surface to the second surface；
One second transparent substrate faces the second surface；
One tft layer, between the second surface and second transparent substrate；And
One liquid crystal layer, between the tft layer and second transparent substrate.
5. display device as claimed in claim 4, which is characterized in that several periodic micro structures are located at the table of the one ridge
On face.
6. display device as claimed in claim 4, which is characterized in that one of several periodic micro structures include:
One wire grid construction is formed on a surface of one of several waveguides；And
One metal layer is covered on the wire grid construction.
7. display device as claimed in claim 4, which is characterized in that the display panel further includes several sub-pixels, this is several
Periodic micro structure respectively corresponds several sub-pixels.
8. display device as claimed in claim 4, which is characterized in that the display panel further includes: a barrier layer, be located at this
On two transparent substrates, and there are several openings, which respectively corresponds several periodic micro structures, and several openings
One of size be greater than the size of one of the periodic micro structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510133001.8A CN106151960B (en) | 2015-03-25 | 2015-03-25 | Backlight module and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510133001.8A CN106151960B (en) | 2015-03-25 | 2015-03-25 | Backlight module and its application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106151960A CN106151960A (en) | 2016-11-23 |
| CN106151960B true CN106151960B (en) | 2019-06-21 |
Family
ID=57339456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510133001.8A Active CN106151960B (en) | 2015-03-25 | 2015-03-25 | Backlight module and its application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106151960B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110136592B (en) * | 2018-02-09 | 2020-07-24 | 京东方科技集团股份有限公司 | Pixel structure, display panel, display device and display method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005317462A (en) * | 2004-04-30 | 2005-11-10 | Rikogaku Shinkokai | Plasma treatment device and plasma treatment method |
| CN1900784A (en) * | 2005-07-20 | 2007-01-24 | 清华大学 | Light conductive plate and back light module |
| CN101346582A (en) * | 2005-12-27 | 2009-01-14 | 松下电器产业株式会社 | Planar lighting device and liquid crystal display device using the same |
| JP2010078795A (en) * | 2008-09-25 | 2010-04-08 | Panasonic Corp | Liquid crystal display device |
| CN102096233A (en) * | 2009-12-14 | 2011-06-15 | 康佳集团股份有限公司 | Light guide plate for liquid crystal display, backlight module, and liquid crystal display device |
| CN102287717A (en) * | 2011-08-25 | 2011-12-21 | 上海交通大学 | Back light system with wave guide structure |
| US8596846B2 (en) * | 2012-03-16 | 2013-12-03 | Nano-Optic Devices, Llc | Frontlight unit for enhancing illumination of a reflective display |
| CN104020896A (en) * | 2014-05-14 | 2014-09-03 | 上海交通大学 | Optical touch control screen based on optical gratings |
| CN104090422A (en) * | 2014-06-18 | 2014-10-08 | 京东方科技集团股份有限公司 | Display device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009116224A1 (en) * | 2008-03-19 | 2009-09-24 | パナソニック株式会社 | Surface light source device |
| US8585268B2 (en) * | 2011-10-21 | 2013-11-19 | Ergophos, Llc | Light-guide panel for display with laser backlight |
-
2015
- 2015-03-25 CN CN201510133001.8A patent/CN106151960B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005317462A (en) * | 2004-04-30 | 2005-11-10 | Rikogaku Shinkokai | Plasma treatment device and plasma treatment method |
| CN1900784A (en) * | 2005-07-20 | 2007-01-24 | 清华大学 | Light conductive plate and back light module |
| CN101346582A (en) * | 2005-12-27 | 2009-01-14 | 松下电器产业株式会社 | Planar lighting device and liquid crystal display device using the same |
| JP2010078795A (en) * | 2008-09-25 | 2010-04-08 | Panasonic Corp | Liquid crystal display device |
| CN102096233A (en) * | 2009-12-14 | 2011-06-15 | 康佳集团股份有限公司 | Light guide plate for liquid crystal display, backlight module, and liquid crystal display device |
| CN102287717A (en) * | 2011-08-25 | 2011-12-21 | 上海交通大学 | Back light system with wave guide structure |
| US8596846B2 (en) * | 2012-03-16 | 2013-12-03 | Nano-Optic Devices, Llc | Frontlight unit for enhancing illumination of a reflective display |
| CN104020896A (en) * | 2014-05-14 | 2014-09-03 | 上海交通大学 | Optical touch control screen based on optical gratings |
| CN104090422A (en) * | 2014-06-18 | 2014-10-08 | 京东方科技集团股份有限公司 | Display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106151960A (en) | 2016-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107238979B (en) | Light guide assembly, preparation method, backlight module and display device | |
| US10663641B2 (en) | Display panel and display device | |
| US7221418B2 (en) | Liquid crystal display device | |
| US9891460B2 (en) | Substrate for display, display panel and display device | |
| JP6148258B2 (en) | Anamorphic Light Guide | |
| KR101218895B1 (en) | Backlight Unit | |
| CN100538408C (en) | A kind of grating and module backlight thereof | |
| US20180348421A1 (en) | Liquid crystal display device | |
| CN107918233A (en) | A kind of display device | |
| KR20120007050A (en) | A light guide apparatus | |
| TWI391708B (en) | Color separation and polarization device | |
| TW201207508A (en) | The backlight unit and the display device having the same | |
| CN107608134A (en) | Light guide structure, down straight aphototropism mode set and display panel | |
| CN102588845B (en) | Back lighting device and liquid crystal display device | |
| JP6151722B2 (en) | Backlight system | |
| US20160320541A1 (en) | Backlight module and display device | |
| JP2008198602A (en) | Polarization light guide plate and its manufacturing method | |
| CN106170720A (en) | There is the asymmetric turning film of multiple light source | |
| CN113721320A (en) | Optical waveguide structure and display device | |
| US20190056548A1 (en) | Light source assembly and display device | |
| CN107167925A (en) | A kind of field sequence three dimensional display of holographic grating backing structure | |
| CN103807672A (en) | Area light source, backlight module and display device | |
| CN106125304B (en) | It can Wearable display device | |
| JP2015507346A (en) | Backlight guide | |
| CN107505773A (en) | Backlight module and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |