CN109143687A - Backlight module, liquid crystal display die set and electronic equipment - Google Patents
Backlight module, liquid crystal display die set and electronic equipment Download PDFInfo
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- CN109143687A CN109143687A CN201811162965.5A CN201811162965A CN109143687A CN 109143687 A CN109143687 A CN 109143687A CN 201811162965 A CN201811162965 A CN 201811162965A CN 109143687 A CN109143687 A CN 109143687A
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- guide structure
- light guide
- backlight module
- prismatic
- light
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a kind of backlight modules, liquid crystal display die set and electronic equipment, in the backlight module, in the periphery of backlight area, prismatic light guide structure is set, a phosphor powder layer is arranged in the outer surface of prismatic light guide structure, it can change the direction of propagation of the light of the outgoing of the LED light-emitting component adjacent with prismatic light guide structure by prismatic light guide structure, to reduce incidence angle of the emergent ray relative to the fluorescent film, so that the light that backlight module is dissipated to periphery is with lesser incident angle incident fluorescence film or vertical incidence fluorescent film, to improve the light intensity of irradiation fluorescent film periphery, fluorescent film periphery is excited to be emitted more white lights.Prismatic light guide structure can avoid the aggregation of periphery blue light by the scattering process of its surface fluorescence powder particles, solve the problems, such as that edge backlight is partially blue.The liquid crystal display die set and electronic equipment include the backlight module, solve the problems, such as that backlight edge is partially blue, improve image displaying quality.
Description
Technical field
The present invention relates to electronic technology fields, more specifically, being related to a kind of backlight module, liquid crystal display die set and electricity
Sub- equipment.
Background technique
With the continuous development of science and technology, more and more electronic equipments having a display function are widely used in
In daily life and work, huge convenience is brought for daily life and work, becomes current
The indispensable important tool of people.Electronic equipment realizes that the main component of display function is display panel.Currently, electronic equipment
A kind of common display panel is liquid crystal display panel.Liquid crystal display panel includes the liquid crystal display die set being oppositely arranged and back
Optical mode group, backlight module do not emit light itself, and are performed image display using the backlight that backlight module provides.
High dynamic range images (High-Dynamic Range, abbreviation HDR) have higher color depth, wider array of dynamic range
With stronger color representation power, the performances such as the high comparison of the liquid crystal display panel of HDR display pattern/highlighted are significantly better than conventional liquid
LCD panel, it might even be possible to which OLED display panel of comparing becomes an important R&D direction of LCD display board industry.
Currently, the liquid crystal display panel of HDR display pattern generally uses down straight aphototropism mode set, down straight aphototropism mode set packet
LED array is included, there are multiple LED light-emitting components.There is edge backlight indigo plant partially, striograph in existing backlight module
As display quality.
Summary of the invention
To solve the above-mentioned problems, technical solution of the present invention provides a kind of backlight module, liquid crystal display panel and electricity
Sub- equipment solves the problems, such as backlight module there are edge backlight indigo plant partially, improves image displaying quality.
To achieve the goals above, the invention provides the following technical scheme:
A kind of backlight module, the backlight module include:
Substrate；
Multiple LED light-emitting components, the LED light-emitting component are arranged in the first surface of the substrate, and with the substrate
It is electrically connected, all LED light-emitting components limit a backlight area；
The light emission side of the LED light-emitting component, and the first surface with the substrate is arranged in fluorescent film, the fluorescent film
It is oppositely arranged；
Prismatic light guide structure, periphery of the prismatic light guide structure setting in the backlight area, the prismatic light guide knot
A phosphor powder layer is arranged in the outer surface of structure；
Wherein, the prismatic light guide structure going out for changing the LED light-emitting component adjacent with the prismatic light guide structure
The direction of propagation for the light penetrated.
Preferably, in above-mentioned backlight module, the LED light-emitting component is emitted blue light, for exciting the fluorescent film to go out
Penetrate white light.
Preferably, in above-mentioned backlight module, the phosphor powder layer includes red fluorescence powder and/or green emitting phosphor.
Preferably, in above-mentioned backlight module, multiple LED light-emitting components are arranged in array, two LEDs adjacent with a line
The prismatic light guide structure is provided between light-emitting component, and/or, between two adjacent LED light-emitting components of same row
It is provided with the prismatic light guide structure.
Preferably, in above-mentioned backlight module, the height of the prismatic light guide structure is greater than the height of the LED light-emitting component
Degree；
On perpendicular to the direction on the substrate, the prismatic light guide structure have towards the substrate first end with
And the second end towards the fluorescent film；
The first end is abutted with the substrate, and/or, the second end is abutted with the fluorescent film.
Preferably, in above-mentioned backlight module, the substrate surface is provided with planarization glue-line, the LED light-emitting component
And the prismatic light guide structure is at least partially disposed in the planarization glue-line.
Preferably, in above-mentioned backlight module, the prismatic light guide structure is triangular prism, and the triangular prism is for leading to
Superrefraction and/or total reflection change the direction of propagation of the light.
Preferably, in above-mentioned backlight module, when the prismatic light guide structure is triangular prism, the triangular prism hangs down
Directly in the section of seamed edge be isosceles acute triangle；
The apex angle of the isosceles acute triangle is arranged towards the substrate, bottom edge towards the fluorescent film, and parallel
In the fluorescent film.
Preferably, in above-mentioned backlight module, when the prismatic light guide structure is triangular prism, the triangular prism hangs down
Directly in the section of seamed edge be isosceles right triangle；
One right-angle side of the isosceles right triangle is arranged towards the fluorescent film, and is parallel to the fluorescent film,
First surface of its another right-angle side perpendicular to the substrate.
Preferably, in above-mentioned backlight module, the prismatic light guide structure is collector lens, and the collector lens is used for will
Incident ray is converged towards the direction perpendicular to the fluorescent film.
Preferably, in above-mentioned backlight module, the collector lens is convex lens, or poly- with multiple raised structures
Optical element.
The present invention also provides a kind of liquid crystal display die set, the liquid crystal display die set includes:
The liquid crystal display panel and backlight module being oppositely arranged；
The backlight module is backlight module described in any of the above embodiments.
The present invention also provides a kind of electronic equipment, the electronic equipment includes above-mentioned liquid crystal display die set.
As can be seen from the above description, in the backlight module that technical solution of the present invention provides, it is arranged in the periphery of backlight area
A phosphor powder layer is arranged in prismatic light guide structure, the outer surface of the prismatic light guide structure, can be with by the prismatic light guide structure
Change the direction of propagation of the light of the outgoing of the LED light-emitting component adjacent with the prismatic light guide structure, to reduce emergent ray
Relative to the incidence angle of the fluorescent film, so that the light that backlight module is dissipated to periphery is with lesser incident angle incident fluorescence
Film or vertical incidence fluorescent film, to improve the light intensity of irradiation fluorescent film periphery, excitation fluorescent film periphery outgoing is more
White light.And the surface of prismatic light guide structure has phosphor powder layer, can avoid week by the scattering process of fluorescent powder grain
The aggregation of edge blue light, therefore, can solve backlight module has edge backlight indigo plant partially, improves image and shows matter
Amount.The liquid crystal display die set and electronic equipment that technical solution of the present invention provides include the backlight module, and then solve back
The partially blue problem in light edge, improves image displaying quality.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the layout top view of LED light-emitting component in a kind of backlight module provided in an embodiment of the present invention；
Fig. 2 is sectional drawing of the Fig. 1 in P-P '；
Fig. 3 is the layout top view of LED light-emitting component in another backlight module provided in an embodiment of the present invention；
Fig. 4 is sectional drawing of the Fig. 3 in P-P '；
Fig. 5 is a kind of optical path adjusting schematic illustration of prismatic light guide structure provided in an embodiment of the present invention；
Fig. 6 is the optical path adjusting schematic illustration of another prismatic light guide structure provided in an embodiment of the present invention；
Fig. 7 is the optical path adjusting schematic illustration of another prismatic light guide structure provided in an embodiment of the present invention；
Fig. 8 is the optical path adjusting schematic illustration of another prismatic light guide structure provided in an embodiment of the present invention；
Fig. 9 is a kind of structural schematic diagram of liquid crystal display die set provided in an embodiment of the present invention；
Figure 10 is the structural schematic diagram of a kind of electronic equipment provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the liquid crystal display panel of existing HDR display pattern, the down straight aphototropism mode set used is generally used remarkably
The Mini LED of blue light is as light-emitting component.Because backlight module periphery (edge) fluorescent film cutting precision is different, lead
The concentration of the fluorescent powder of periphery fluorescent film is caused to have differences；It is on the other hand, larger in the local blue light strength of Mini LED aggregation,
Excitation energy is big, and edge blue light strength is smaller, and excitation energy is small, leads to backlight module asking there are edge backlight indigo plant partially
Topic, imaged image show quality.
To solve the above-mentioned problems, the embodiment of the invention provides a kind of backlight modules, are arranged in the periphery of backlight area
A phosphor powder layer is arranged in the outer surface of prismatic light guide structure, the prismatic light guide structure, is passed by prismatic light guide structure to light
The adjusting in direction and the scattering process of its surface fluorescence powder are broadcast, can solve backlight module, there are edge backlight indigo plants partially
Problem improves image displaying quality.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
With reference to Fig. 1 and Fig. 2, Fig. 1 is that the layout of LED light-emitting component in a kind of backlight module provided in an embodiment of the present invention is bowed
View, Fig. 2 are sectional drawing of the Fig. 1 in P-P ', and shown backlight module is used for liquid crystal display die set, and the backlight module includes: base
Plate 11；Multiple LED light-emitting components 12, multiple LED light-emitting components 12 are arranged in array, multiple LED light-emitting components 12
The first surface 111 of the substrate 11 is set, and is electrically connected with the substrate 11；All LED light-emitting components 12 limit
A fixed backlight area 13.
The backlight module further includes fluorescent film 15 and prismatic light guide structure 14, and the fluorescent film 15 is arranged described
The light emission side of LED light-emitting component 12, and be oppositely arranged with the first surface 111 of the substrate 11；The prismatic light guide structure 14
The periphery of the backlight area is set；A phosphor powder layer 17 is arranged in the outer surface of the prismatic light guide structure 14；Wherein, described
Prismatic light guide structure 14 for changing the light of the outgoing of the LED light-emitting component 12 adjacent with the prismatic light guide structure 14 biography
Broadcast direction.
In order to clearly show the layout of LED light-emitting component 12, fluorescent film 15 and prismatic light guide structure 14 are not shown in Fig. 1
The phosphor powder layer 17 on surface.In order to clearly illustrate different perspectives orientation in attached drawing of the present invention, it is in description of the invention attached drawing
It is reference based on same three-dimensional cartesian coordinate system XYZ, the first surface 111 of substrate 11 is parallel to X/Y plane.
The substrate 11 have opposite first surface 111 and second surface 112, the LED light-emitting component 12 and
The prismatic light guide structure 14 is arranged on the first surface 111 of the substrate 11.
In backlight module described in the embodiment of the present invention, the periphery of the backlight area 13 is provided with prismatic light guide structure 14,
In this way, being provided with multiple prismatic light guide structures 14 in the edge of the backlight area 13, thus it is possible to vary led with the prism
The direction of propagation of the light of the outgoing of the adjacent LED light-emitting component 12 of photo structure 14, to reduce emergent ray relative to described glimmering
The incidence angle of light film 15, so that the light that dissipates to periphery of backlight module is with lesser incident angle incident fluorescence film 15 or hangs down
Straight incident fluorescence film 15, to improve the light intensity for being incident to 15 periphery of fluorescent film, excitation 15 periphery of fluorescent film outgoing is more
White light.
Further, the surface of prismatic light guide structure 14 provided in an embodiment of the present invention has phosphor powder layer 17, Ke Yitong
The scattering process for crossing fluorescent powder grain avoids the aggregation of periphery blue light, and therefore, can solve backlight module, there are edge back
The partially blue problem of light, improves image displaying quality.
Optionally, the LED light-emitting component 12 is emitted blue light, for exciting 15 ejecting white light of fluorescent film.It is described glimmering
Light film 15 includes red fluorescence powder and green emitting phosphor, can be able to is liquid crystal display panel by blue laser ejecting white light
Uniform white backlight is provided.
For the prismatic light guide structure 14, the phosphor powder layer 17 of surface setting include red fluorescence powder and/or
Green emitting phosphor.Phosphor powder layer 17 can be set on 14 surface of prismatic light guide structure by coating process.When only in the backlight
When the prismatic light guide structure 14 is arranged in the periphery in region 13, the phosphor powder layer 17 includes red fluorescence powder and green fluorescence
The blue light of powder, such entrance prism light guide structure 14 can be with 17 ejecting white light of excitated fluorescent powder layer, and then reduces backlight area 13
The blue light of periphery avoids the partially blue problem of periphery.
The back side of LED light-emitting component 12 is bundled on the first surface 11 of substrate 11, and substrate 11 is circuit board, has interconnection
Circuit, for being electrically connected with control chip, two electrodes at 12 back side of LED light-emitting component are electrically connected with interconnection circuit, pass through control
Chip controls LED light-emitting component 12 processed being lighted and closing.
The LED light-emitting component 12 can be Mini LED, and Mini LED refers to LED of the size at 100 μm or more.From system
Seen in journey, Mini LED compared to Micro LED for, yield is high, has special-shaped cutting characteristic, can arrange in pairs or groups soft yieldable
Substrate can also achieve the form of high curved surface backlight or arrange in pairs or groups rigid inflexibility substrate, be designed using local dimming, will be described
Backlight area 13 divides multiple local dimming regions, and each local dimming region includes at least one LED light-emitting component, Ge Geju
The luminance in portion light modulation region can be controlled individually, can be controlled in this way according to the brightness and/or chrominance information of image to be displayed
Make the luminance in each local dimming region so that display image possesses better color rendering, energy band to liquid crystal display panel more
Fine HDR (High-Dynamic Range, high dynamic range images) subregion, and thickness also approaches oled panel, convenient for light
Thinning design, while there is electricity-saving function.In other embodiments, the LED light-emitting component 12 or Micro
LED.Micro LED is LED miniatureization and matrixing technology, is exactly that LED backlight is carried out to filming, small in simple terms
Change, array, LED light-emitting component 12 can be allowed less than 100 microns, can be realized the independent addressing of each pel as OLED,
Luminous (self-luminous) is operated alone.
In the mode shown in Fig. 1 and Fig. 2, the prismatic light guide structure 14 only is set in the periphery of the backlight area 13,
For reducing the polarisation problem of 14 periphery of backlight area.
In backlight module described in the embodiment of the present invention, multiple LED light-emitting components 12 can be arranged in array, in order to
Layout L ED light-emitting component 12, meanwhile, it can be made to be evenly spaced in the first surface of substrate 11 111, with formed uniformity compared with
Good area source.LED light-emitting component 12 is the surface of main emergent ray, surface emergent ray tool away from the top surface of substrate 11
Have certain dispersion angle, side can be emitted the light of some strength, but relative to top surface, emergent ray intensity compared with
It is weak, therefore the emergent ray intensity between adjacent LED is weaker, will lead to backlight area and occurs in corresponding 12 position of LED light-emitting component
White bright spot, and the problem that 12 interstitial site white light of LED light-emitting component is weaker, so that the white brightness of backlight area 12 is uneven
It is even.Therefore in order to improve white light uniformity, the rib can be provided between two adjacent LED light-emitting components 12 of same a line
Mirror light guide structure 14, and/or, 14 knot of prismatic light guide is provided between two adjacent LED light-emitting components 12 of same row
Structure.Wherein, the gap is with the spaced position between a line or same row two adjacent LEDs.
The adjustable light propagation path of prismatic light guide structure, reduce the light relative to the fluorescent film 15
Incidence angle so that the light towards fluorescent film 15 vertical direction converge.Therefore between two adjacent LEDs light-emitting component 12
Prismatic light guide structure 14 is set, light between two 12 gaps of LED light-emitting component can be made towards the gap face
The vertical direction convergence of fluorescence diaphragm area fluorescent film 15 can be excited to be emitted to improve the light luminance between the gap
More blue lights, improve the corresponding white brightness of 12 interstitial site of LED light-emitting component, and the white light for improving backlight area 13 is uniform
Property.
With reference to Fig. 3 and Fig. 4, Fig. 3 is the layout of LED light-emitting component in another backlight module provided in an embodiment of the present invention
Top view, Fig. 4 are sectional drawing of the Fig. 3 in P-P ', and fluorescent film 15 is not shown in Fig. 3, fluorescent film 15 and prism are not shown in Fig. 3
The phosphor powder layer 17 on 14 surface of light guide structure.In which, it is respectively provided between two adjacent LED light-emitting components 12 of same a line
One prismatic light guide structure 14, and a prismatic light guide knot is respectively provided between two adjacent LED light-emitting components 12 of same row
Structure 14 can greatly improve the uniformity of 13 ejecting white light of backlight area.
In other modes, a prism can also be respectively provided between two adjacent LED light-emitting components 12 of same a line and led
Photo structure 14, or, it is respectively provided with a prismatic light guide structure 14 between two adjacent LED light-emitting components 12 of same row, it can also
To improve white light uniformity to a certain extent.
When between LED light-emitting component 12 be arranged prismatic light guide structure 14 when, all 14 surfaces of prismatic light guide structure it is glimmering
A kind of fluorescent powder of color can be only arranged in light bisque 17, can be such as red fluorescence powder or green emitting phosphor, pass through in this way
The solid color fluorescent powder on 14 surface of prismatic light guide structure can increase the ratio of the color light in ejecting white light, improve and use
Comfort level is watched at family, and it includes green emitting phosphor that the phosphor powder layer 17, which such as can be set, only, can uniformly increase white backlight
The ratio of middle green light, green light are eyeshield colors, and it includes red fluorescence powder that the phosphor powder layer 17, which such as can be set, can be uniform
Increase the ratio of feux rouges in white backlight, so that backlight is warm colour backlight.
In backlight module described in the embodiment of the present invention, the height of the prismatic light guide structure 14 is greater than the luminous member of the LED
The height of part 12；On perpendicular to the direction on the substrate 11, the prismatic light guide structure 14 has towards the substrate 11
First end and second end towards the fluorescent film 15；The first end is abutted with the substrate 11, and/or, described
Two ends are abutted with the fluorescent film 15.
In the embodiment of the present invention, it is preferably provided with the first end and is abutted with the substrate 11, in this way since the prism is led
The height of photo structure 14 is greater than the height of the LED light-emitting component 12, and LED light-emitting component 12 can be made to be emitted towards its surrounding
Light can with entrance prism light guide structure 14, and then by prismatic light guide structure 14 adjust exit direction, with it is lesser enter
Firing angle degree incident fluorescence film 15.
When the first end is abutted with the substrate 11, the second end can be abutted with the fluorescent film 15, can also
There is setting spacing with the fluorescent film 15.The first end can be set to abut with the substrate 11, and the second end
It is abutted with the fluorescent film 15, to reduce spacing between fluorescent film 15 and substrate 11, reduces the thickness of backlight module.
Optionally, 11 surface of substrate is provided with planarization glue-line 16, the LED light-emitting component 12 and the prism
Light guide structure 14 is respectively positioned in the planarization glue-line 16.Can LED light-emitting component first be bound in the first surface 111 of substrate 11
12, planarization glue-line 16 then is set on surface, groove is formed in the corresponding position of planarization glue-line 16 after solidification, for placing
Prismatic light guide structure 14.LED light-emitting component 12 first first can also be bound in the first surface of substrate 11, and be fixed temporarily prism
Light guide structure 14 re-forms planarization glue-line 16, and then is completely fixed prismatic light guide structure 14.
In the embodiment of the present invention, the prismatic light guide structure 14 can be triangular prism, and the triangular prism is for passing through
Refraction and/or total reflection change the direction of propagation of the light.
When the prismatic light guide structure 14 is triangular prism, as shown in figure 5, Fig. 5 is provided in an embodiment of the present invention one
The optical path adjusting schematic illustration of kind prismatic light guide structure, shown prismatic light guide structure 14 are triangular prism, the triangular prism
Section perpendicular to seamed edge is isosceles acute triangle；The apex angle of the isosceles acute triangle is towards the substrate, apex angle
It can abut or not abut with substrate 11, bottom edge is arranged towards the fluorescent film 15, and is parallel to the fluorescent film, bottom edge
It can abut or not abut with fluorescent film 15.
In which, the light direction of propagation is as the dotted line arrows, and the one of the isosceles acute triangle section of triangular prism
A waist edge obtains the light of the oblique outgoing of an adjacent LED light-emitting component 12, and total reflection and refractive transmission occurs in another waist edge,
Light after total reflection passes through its bottom edge incident fluorescence film 15, refractive transmission light incident fluorescence film 15, so that total reflection
A part of light and refractive transmission another part light with small incident degree incident fluorescence film 15, change light and propagate
Path improves light uniformity and avoids the partially blue problem in periphery.
For clear diagram light propagation path, it is corresponding that a prismatic light guide structure 14 is only gived in mode shown in Fig. 5
The propagation optical path of one 12 incident ray of LED light-emitting component.
When only when prismatic light guide structure 14 is arranged in 13 periphery of backlight area, each prismatic light guide structure 14 only has a side
The light of face acquisition 14 oblique incidence of adjacent LED light-emitting component.When prismatic light guide structure, and phase is arranged in 13 periphery of backlight area
When being also equipped with prismatic light guide structure 14 between adjacent two LED light-emitting components 12, as shown in figure 5, two adjacent LEDs light-emitting component
A prismatic light guide structure 14 is shared between 12, for the prismatic light guide structure 14 between two adjacent LEDs light-emitting component 12,
The light propagation path of its incident side of two LED light-emitting components adjustable simultaneously.
In other modes, when the prismatic light guide structure is triangular prism, as shown in fig. 6, Fig. 6 is the embodiment of the present invention
The optical path adjusting schematic illustration of another prismatic light guide structure of offer, shown prismatic light guide structure 14 are triangular prism, institute
It is isosceles right triangle that triangular prism, which is stated, perpendicular to the section of seamed edge；One right-angle side direction of the isosceles right triangle
The fluorescent film 15 is arranged, and is parallel to the fluorescent film, first surface of another right-angle side perpendicular to the substrate 11.
In which, the light direction of propagation is as the dotted line arrows, the right-angle side court perpendicular to substrate 11 of triangular prism
To adjacent LED light-emitting component 12, the oblique light of the LED light-emitting component 12 outgoing is obtained, after the transmitting total reflection of its bottom edge,
From another right-angle side incident fluorescence film 15, so that changing light with small incident degree incident fluorescence film 15 and propagating road
Diameter improves light uniformity and avoids the partially blue problem in periphery.
For clear diagram light propagation path, it is corresponding that a prismatic light guide structure 14 is only gived in mode shown in Fig. 6
The propagation optical path of one 12 incident ray of LED light-emitting component.
When only when prismatic light guide structure 14 is arranged in 13 periphery of backlight area, the LED positioned at 13 surrounding of backlight area shines
Element 12 is correspondingly arranged a prismatic light guide structure 14 in the outside of backlight area 13.When in 13 periphery of backlight area setting rib
Mirror light guide structure, and when being also equipped with prismatic light guide structure 14 between two adjacent LEDs light-emitting component 12, as shown in fig. 6, adjacent
Between two LED light-emitting components 12 be arranged two prismatic light guide structures 14, in order to each LED light-emitting component 12 respectively correspond into
A LED light-emitting component is penetrated, is totally reflected.
In the above method, it is illustrated so that prismatic light guide structure 14 is triangular prism as an example, in other modes, institute
Stating prismatic light guide structure 14 can also be collector lens, and the collector lens is used for incident ray towards perpendicular to the fluorescence
It converges in the direction of film.
The collector lens is convex lens, at this point, the structure of the backlight module is as shown in fig. 7, Fig. 7 is that the present invention is implemented
The optical path adjusting schematic illustration for another prismatic light guide structure that example provides, shown prismatic light guide structure 14 are convex lens.It should
In mode, convex lens has the opposite plane of incidence and exit facet, and the plane of incidence is convex surface, and exit facet is opposite with fluorescent film 15
Concave curved surface.In which, the light direction of propagation is as the dotted line arrows,
For clear diagram light propagation path, it is corresponding that a prismatic light guide structure 14 is only gived in mode shown in Fig. 7
The propagation optical path of one 12 incident ray of LED light-emitting component.
When only when prismatic light guide structure 14 is arranged in 13 periphery of backlight area, the LED positioned at 13 surrounding of backlight area shines
Element 12 is correspondingly arranged a prismatic light guide structure 14 in the outside of backlight area 13.When in 13 periphery of backlight area setting rib
Mirror light guide structure, and when being also equipped with prismatic light guide structure 14 between two adjacent LEDs light-emitting component 12, as shown in fig. 7, adjacent
Between two LED light-emitting components 12 be arranged share a prismatic light guide structure 14 when, for two adjacent LEDs light-emitting component 12 it
Between prismatic light guide structure 14, the light propagation path of its incident side of two LED light-emitting components adjustable simultaneously.It should
In mode, the upper end of collector lens is abutted with fluorescent film 15, and lower end can abut with substrate 11 or have setting spacing.
When the prismatic light guide structure 14 is collector lens, the backlight module can be as shown in figure 8, Fig. 8 be originally
The optical path adjusting schematic illustration for another prismatic light guide structure that inventive embodiments provide, which are to gather with Fig. 7 difference
The structure of optical lens is different, and in which, collector lens is similarly convex lens, has the plane of incidence and exit facet, and the plane of incidence is
Convex surface, exit facet are the plane being oppositely arranged in parallel with fluorescent film 15.
When the prismatic light guide structure 14 is collector lens, the prismatic light guide structure 14 be can be with multiple protrusions
The collective optics of structure.Which adjusts the incident angle of light incident fluorescence film 15 also with convex lens concentrating light principles, makes
It is obtained with smaller angle incident fluorescence film, avoids the partially blue problem of 13 periphery of backlight area and raising white light uniformity to realize.
The backlight module further includes the diffusion barrier that the fluorescent film 15 is arranged in and deviates from 12 side of LED light-emitting component
And the brightness enhancement film that the diffusion barrier deviates from 15 side of fluorescent film is set.The diffusion barrier is used to improve outgoing backlight
Uniformity.The brightness enhancement film includes two layers of relatively-stationary prismatic lens, for improving the collimation of emergent ray.Two layers of prism
Piece is adhesively fixed by glue-line, has fluorescent powder in the glue-line, described for improving the uniformity of emergent ray by diffusion
Fluorescent powder color can be set according to demand, such as can be the mixture of red fluorescence powder and green emitting phosphor, or be red
Fluorescent powder, or it is green emitting phosphor.
Backlight module described in the embodiment of the present invention is down straight aphototropism mode set, and all LED light-emitting components 12 are located at same base
The first surface of plate 11 can be emitted area source, can be 13 weeks to avoid backlight area by the way that the prismatic light guide structure 14 is arranged
The partially blue problem of edge and the uniformity for improving ejecting white light.
Based on above-mentioned backlight module embodiment, another embodiment of the present invention additionally provides a kind of liquid crystal display die set, described
Liquid crystal display die set is as shown in figure 9, Fig. 9 is a kind of structural schematic diagram of liquid crystal display die set provided in an embodiment of the present invention, institute
Stating liquid crystal display die set includes: the liquid crystal display panel 52 and backlight module 51 being oppositely arranged；The backlight module 51 is upper
State backlight module described in embodiment.
The liquid crystal display die set is avoided backlight area surrounding indigo plant partially and is asked using backlight module described in above-described embodiment
Topic, improves the uniformity of emergent ray, improves image displaying quality.
It is additionally provided based on above-mentioned backlight module embodiment and liquid crystal display die set embodiment, another embodiment of the present invention
A kind of electronic equipment, the electronic equipment is as shown in Figure 10, and Figure 10 is the knot of a kind of electronic equipment provided in an embodiment of the present invention
Structure schematic diagram, the electronic equipment include liquid crystal display die set 61, and the liquid crystal display die set 61 is liquid described in above-described embodiment
Brilliant display module.
Electronic equipment described in the embodiment of the present invention can be mobile phone, tablet computer, laptop, TV and wearable
The electronic equipment having a display function such as equipment.The electronic equipment is avoided using liquid crystal display die set described in above-described embodiment
The partially blue problem of backlight area surrounding, improves the uniformity of emergent ray, improves image displaying quality.
It should be noted that each embodiment in this specification is described in a progressive manner, each embodiment emphasis is said
Bright is the difference from other embodiments, and the same or similar parts in each embodiment may refer to each other.For reality
For applying liquid crystal display die set and electronic equipment disclosed in example, since it is corresponding with backlight module disclosed in embodiment, institute
To be described relatively simple, related place illustrates referring to the corresponding part of backlight module.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that article or equipment including a series of elements not only include those elements, but also
It including other elements that are not explicitly listed, or further include for this article or the intrinsic element of equipment.Do not having
In the case where more limitations, the element that is limited by sentence "including a ...", it is not excluded that in the article including above-mentioned element
Or there is also other identical elements in equipment.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (13)
1. a kind of backlight module, which is characterized in that the backlight module includes:
Substrate；
Multiple LED light-emitting components, the LED light-emitting component are arranged in the first surface of the substrate, and with the electrical property of substrate
Connection, all LED light-emitting components limit a backlight area；
The light emission side of the LED light-emitting component is arranged in fluorescent film, the fluorescent film, and opposite with the first surface of the substrate
Setting；
Prismatic light guide structure, the prismatic light guide structure setting the backlight area periphery, the prismatic light guide structure
A phosphor powder layer is arranged in outer surface；
Wherein, the prismatic light guide structure for changing the LED light-emitting component adjacent with the prismatic light guide structure outgoing
The direction of propagation of light.
2. backlight module according to claim 1, which is characterized in that the LED light-emitting component is emitted blue light, for exciting
The fluorescent film ejecting white light.
3. backlight module according to claim 1, which is characterized in that the phosphor powder layer include red fluorescence powder and/or
Green emitting phosphor.
4. backlight module according to claim 1, which is characterized in that multiple LED light-emitting components are arranged in array, same to a line
The prismatic light guide structure is provided between two adjacent LED light-emitting components, and/or, the adjacent two LED hair of same row
The prismatic light guide structure is provided between optical element.
5. backlight module according to claim 1, which is characterized in that the height of the prismatic light guide structure is greater than described
The height of LED light-emitting component；
On perpendicular to the direction on the substrate, the prismatic light guide structure has first end and court towards the substrate
To the second end of the fluorescent film；
The first end is abutted with the substrate, and/or, the second end is abutted with the fluorescent film.
6. backlight module according to claim 1, which is characterized in that the substrate surface is provided with planarization glue-line, institute
It states LED light-emitting component and the prismatic light guide structure is at least partially disposed in the planarization glue-line.
7. backlight module according to claim 1-6, which is characterized in that the prismatic light guide structure is triangular prism
Mirror, the triangular prism are used to change by refraction and/or total reflection the direction of propagation of the light.
8. backlight module according to claim 7, which is characterized in that when the prismatic light guide structure is triangular prism,
The triangular prism is isosceles acute triangle perpendicular to the section of seamed edge；
The apex angle of the isosceles acute triangle is arranged towards the substrate, bottom edge towards the fluorescent film, and is parallel to institute
State fluorescent film.
9. backlight module according to claim 7, which is characterized in that when the prismatic light guide structure is triangular prism,
The triangular prism is isosceles right triangle perpendicular to the section of seamed edge；
One right-angle side of the isosceles right triangle is arranged towards the fluorescent film, and is parallel to the fluorescent film, another
First surface of one right-angle side perpendicular to the substrate.
10. backlight module according to claim 1-6, which is characterized in that the prismatic light guide structure is optically focused
Lens, the collector lens are used to converge incident ray towards the direction perpendicular to the fluorescent film.
11. backlight module according to claim 10, which is characterized in that the collector lens is convex lens, or is had
The collective optics of multiple raised structures.
12. a kind of liquid crystal display die set, which is characterized in that the liquid crystal display die set includes:
The liquid crystal display panel and backlight module being oppositely arranged；
The backlight module is such as the described in any item backlight modules of claim 1-11.
13. a kind of electronic equipment, which is characterized in that the electronic equipment includes liquid crystal display mode as claimed in claim 12
Group.
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| CN114236905A (en) * | 2021-12-14 | 2022-03-25 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display device |
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