CN110501844A - A kind of preparation method of backlight module, display device and backlight module - Google Patents
A kind of preparation method of backlight module, display device and backlight module Download PDFInfo
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- CN110501844A CN110501844A CN201910796282.3A CN201910796282A CN110501844A CN 110501844 A CN110501844 A CN 110501844A CN 201910796282 A CN201910796282 A CN 201910796282A CN 110501844 A CN110501844 A CN 110501844A
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- reflection
- plane
- guide plate
- light guide
- micro
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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
-
- 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
- G02F1/133605—Direct backlight including specially adapted reflectors
Abstract
The present invention provides the preparation method of a kind of backlight module, display device and backlight module, and backlight module includes: light guide plate mainboard, and light guide plate mainboard includes opposite first surface and second surface, and the side end face of connection first surface and second surface；First surface is the light-emitting surface of light guide plate mainboard；At least one light source, positioned at at least partly side end face of light guide plate mainboard；Multiple micro-structures, positioned at the second surface of light guide plate mainboard；Micro-structure includes first plane of reflection and second plane of reflection, first plane of reflection connect to form V-structure with second plane of reflection, and first the angle of the plane of reflection and first surface be not equal to the angle of second plane of reflection and first surface, first plane of reflection and the second plane of reflection reflection source expose at least partly light in light guide plate mainboard.The present invention is greater than the visible angular field of view of the other side with the visible angular field of view in the side for realizing display device, to meet peep-proof demand.
Description
Technical field
The present invention relates to the preparations of field of display technology more particularly to a kind of backlight module, display device and backlight module
Method.
Background technique
With the fast development of flat panel display, indication range and application scenarios are constantly being expanded.What peep-proof was shown
Application scenarios come into being, and in such a scenario, peep-proof is shown can provide the viewing experience of enough secrets to observer, significantly
It is improved in the secret display effect in Special display field.
Existing already existing peep-proof display device mostly can only in side as it can be seen that and the other side is completely invisible, can not
Meet the peep-proof demand to become increasingly abundant.
Summary of the invention
The present invention provides the preparation method of a kind of backlight module, display device and backlight module, to realize display device
The visible angular field of view in side is greater than the visible angular field of view of the other side, to meet peep-proof demand.
In a first aspect, the embodiment of the present invention provides a kind of backlight module, comprising:
Light guide plate mainboard, the light guide plate mainboard include opposite first surface and second surface, and connection described the
The side end face on one surface and the second surface；The first surface is the light-emitting surface of the light guide plate mainboard；
At least one light source, positioned at at least partly side end face of light guide plate mainboard；
Multiple micro-structures, positioned at the second surface of the light guide plate mainboard；The micro-structure include first plane of reflection and
Second plane of reflection, first plane of reflection connect to form V-structure with second plane of reflection, and first reflection
The angle of plane and the first surface is not equal to the angle of second plane of reflection and the first surface, and described first is anti-
It penetrates plane and second plane of reflection reflects at least partly light that the light source exposes in the light guide plate mainboard.
Second aspect, the embodiment of the present invention provide a kind of display device, including backlight module described in first aspect, and
Liquid crystal display panel；The liquid crystal display panel is located on the light direction of the backlight module.
The third aspect, the embodiment of the present invention provide a kind of preparation method of backlight module, comprising:
One light guide plate mainboard is provided；
Form multiple micro-structures in the second surface of the light guide plate mainboard, the micro-structure include first plane of reflection and
Second plane of reflection, first plane of reflection connect to form V-structure with second plane of reflection, and first reflection
The angle of plane and first surface is not equal to the angle of second plane of reflection and the first surface；
In at least partly side end face of the light guide plate mainboard, at least one light source is set；
Wherein, the light guide plate mainboard includes the opposite first surface and the second surface, and described in connection
The side end face of first surface and the second surface；The first surface be the light guide plate mainboard light-emitting surface, described first
The plane of reflection and second plane of reflection reflect at least partly light that the light source exposes in the light guide plate mainboard.
Backlight module provided in an embodiment of the present invention includes light source, light guide plate mainboard and multiple micro-structures, what light source issued
Illumination is mapped in light guide plate mainboard, and the micro-structure for being located at the second surface of light guide plate mainboard reflects.Due to the of micro-structure
One plane of reflection and second plane of reflection have a different inclined degrees, thus by after the reflection of first plane of reflection emergent light with
It is different by the shooting angle of the emergent light after the reflection of second plane of reflection, so that the two sides for realizing display device exist centainly
Visible angular field of view, and the visible angular field of view in side of display device be greater than the other side visible angular field of view, to meet
Peep-proof demand.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of backlight module provided in an embodiment of the present invention；
Fig. 2 is the enlarged structure schematic diagram in the region S1 in Fig. 1；
Fig. 3 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention；
Fig. 4 is the enlarged structure schematic diagram in the region S2 in Fig. 3；
Fig. 5 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention；
Fig. 6 is the enlarged structure schematic diagram in the region S3 in Fig. 5；
Fig. 7 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention；
Fig. 9 is the enlarged structure schematic diagram in the region S4 in Fig. 8；
Figure 10 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention；
Figure 11 is a kind of light path schematic diagram of backlight module provided in an embodiment of the present invention；
Figure 12 is the light path schematic diagram of another backlight module provided in an embodiment of the present invention；
Figure 13 is the light path schematic diagram of another backlight module provided in an embodiment of the present invention；
Figure 14 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention；
Figure 15 is a kind of light path schematic diagram of display device provided in an embodiment of the present invention；
Figure 16 is a kind of preparation method flow chart of backlight module provided in an embodiment of the present invention；
Figure 17 is a kind of preparation process schematic diagram of backlight module provided in an embodiment of the present invention；
Figure 18 is the preparation process schematic diagram of another backlight module provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 is a kind of structural schematic diagram of backlight module provided in an embodiment of the present invention, and Fig. 2 is that the region S1 is put in Fig. 1
Big structure schematic diagram, with reference to Fig. 1 and Fig. 2, backlight module 1 includes light guide plate mainboard 11, at least one light source 12 and multiple micro- knots
Structure 13.Light guide plate mainboard 11 includes opposite first surface 111 and second surface 112, and connection first surface 111 and second
The side end face 113 on surface 112 (illustratively illustrates a side end face 113, light guide plate mainboard 11 can have multiple in Fig. 1
Side end face 113).First surface 111 is the light-emitting surface of light guide plate mainboard 11, that is to say, that is incident in light guide plate mainboard 11
Light is emitted to outside light guide plate mainboard 11 by first surface 111, and provides illuminating bundle for display device.At least one light source 12
In at least partly side end face 113 of light guide plate mainboard 11.Multiple micro-structures 13 are located at the second surface 112 of light guide plate mainboard 11,
Micro-structure 13 includes first plane of reflection 1311 and second plane of reflection 1321, first plane of reflection 1311 and second plane of reflection
1321 connections form V-structure, and the angle of first plane of reflection 1311 and first surface 111 is θ1, second plane of reflection
1321 and the angle of first surface 111 are θ2, θ1Not equal to θ2, first plane of reflection 1311 and second plane of reflection 1321 reflect
Light source 12 exposes at least partly light in light guide plate mainboard 11.
Backlight module provided in an embodiment of the present invention includes light source, light guide plate mainboard and multiple micro-structures, what light source issued
Illumination is mapped in light guide plate mainboard, and the micro-structure for being located at the second surface of light guide plate mainboard reflects.Due to the of micro-structure
One plane of reflection and second plane of reflection have a different inclined degrees, thus by after the reflection of first plane of reflection emergent light with
It is different by the shooting angle of the emergent light after the reflection of second plane of reflection, so that the two sides for realizing display device exist centainly
Visible angular field of view, and the visible angular field of view in side of display device be greater than the other side visible angular field of view, to meet
Peep-proof demand.In addition, display device provided in an embodiment of the present invention can also carry out the adjustment at visible visual angle according to actual needs.
Optionally, with reference to Fig. 1 and Fig. 2, micro-structure 13 includes 131 He of the first protruding portion towards 111 protrusion of first surface
Second protruding portion 132, first plane of reflection 1311 are that the first protruding portion 131 closes on 132 side of the second protruding portion and and light guide plate
Mainboard 11 contact surface, second plane of reflection 1321 be the second protruding portion 132 close on 131 side of the first protruding portion and with leaded light
The surface that plate mainboard 11 contacts.First protruding portion 131 and the second protruding portion 132 form V-type groove.It is micro- in the embodiment of the present invention
Structure 13 includes towards the first protruding portion 131 and the second protruding portion 132 of 111 protrusion of first surface, thus what light source 12 issued
Light can shine directly into first plane of reflection 1311 and after the first surface 111 of light guide plate mainboard 11 is totally reflected
On two planes of reflection 1321, and the light reflected by first plane of reflection 1311 and second plane of reflection 1321 can be by the first table
Face 111 is directly emitted to outside light guide plate mainboard 11, since no light absorbing medium exists, improves first plane of reflection 1311 and second
The reflection efficiency of the plane of reflection 1321.
Optionally, with reference to Fig. 1 and Fig. 2, micro-structure 13 further includes connecting with the first protruding portion 131 and the second protruding portion 132
The body part 133 connect, body part 133 include the third plane 1331 far from the first protruding portion 131 and the second protruding portion 132,
Second surface 112 includes the second surface flat part 1120 parallel with first surface 11.Third plane 1331 and second surface are flat
Smooth portion 1120 is concordant.In the embodiment of the present invention, micro-structure 13 is embedded in light guide plate mainboard 11, far from the first table in micro-structure 13
The third plane 1331 of 11 side of face is concordant with second surface flat part 1120, thus make 1 overall flat of backlight module, in order to
With the assembling of other component.
Fig. 3 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention, and Fig. 4 is the region S2 in Fig. 3
Enlarged structure schematic diagram, with reference to Fig. 3 and Fig. 4, micro-structure 13 further includes connecting with the first protruding portion 131 and the second protruding portion 132
The body part 133 connect, body part 133 include the fourth plane 1332 far from the first protruding portion 131 and the second protruding portion 132,
Second surface 112 includes the second surface flat part 1120 parallel with first surface 111.Fourth plane 1332 and first surface
Vertical range between 111 is greater than the vertical range between second surface flat part 1120 and first surface 111.
Illustratively, with reference to Fig. 3 and Fig. 4, the second surface 112 of light guide plate mainboard 11 includes multiple bulge-structures 110.It is convex
Playing structure 110 has the V-arrangement towards the micro-structure raised, and bulge-structure 110 corresponds in insertion micro-structure 13.Namely
It says, the V-arrangement protrusion of bulge-structure 110 is docked one by one with the v-depression of micro-structure 13.
Fig. 5 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention, and Fig. 6 is the region S3 in Fig. 5
Enlarged structure schematic diagram, with reference to Fig. 5 and Fig. 6, micro-structure 13 includes 131 He of the first protruding portion towards 111 protrusion of first surface
Second protruding portion 132, first plane of reflection 1311 are that the first protruding portion 131 closes on 132 side of the second protruding portion and and light guide plate
Mainboard 11 contact surface, second plane of reflection 1321 be the second protruding portion 132 close on 131 side of the first protruding portion and with leaded light
The surface that plate mainboard 11 contacts.First protruding portion 131 and the second protruding portion 132 form V-type groove.First protruding portion 131 includes
The first protruding portion bottom surface 1312 positioned at first plane of reflection 1311 far from 111 side of first surface, second is prominent
Portion 132 includes being located at second protruding portion bottom surface 1322 of second plane of reflection 1321 far from 111 side of first surface,
First protruding portion bottom surface 1312, the second protruding portion bottom surface 1322 and 1120 three of second surface flat part are concordant.
Fig. 7 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention, and with reference to Fig. 7, micro-structure 13 is wrapped
Include solid material.Backlight module 1 further includes being located at micro-structure substrate 14 of multiple micro-structures 13 far from 11 side of light guide plate mainboard,
Multiple micro-structures 13 are connected as one by micro-structure substrate 14.In the embodiment of the present invention, multiple micro-structures 13 are fixed on micro- knot
The same side of structure substrate 14, multiple micro-structures 13 are connected as one by structural substrates 14, to make two neighboring micro-structure 13
Between spacing be not easy to change.It, can be simultaneously to multiple micro- knots when multiple micro-structures 13 are connected as one by structural substrates 14
Structure 13 realizes the operation such as mobile, to simplify the preparation process of backlight module 1 without each individually operated micro-structure 13.
When multiple micro-structures 13 are connected as one by micro-structure substrate 14, micro-structure 13 and micro-structure substrate 14 can use of the same race
Material is formed, and the material of micro-structure 13 and micro-structure substrate 14 may include the material of high reflectance, the material of high reflectance
Material for example may include metal material.The reflectivity of the material of high reflectance can for example be greater than 60%.It is irradiated to adjacent
Light between micro-structure 13 exposes at second surface flat part 1120, thus by micro- at second surface flat part 1120
Structural substrates 14 are reflected towards first surface 111, to increase the light extraction efficiency of backlight module.Illustratively, with reference to Fig. 7,
Multiple micro-structures 13 can use identical material with micro-structure substrate 14.Such as it can be in a thicker micro-structure substrate 14
On perform etching, micro-structure substrate 14 and multiple micro-structures 13 in micro-structure substrate 14 are formed, to simplify back
The preparation process of optical mode group 1.
It should be noted that micro-structure 13 shown in Fig. 1-Fig. 7 includes solid material, in other embodiments mode,
Micro-structure 13 can also include gas material.
Fig. 8 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention, and Fig. 9 is the region S4 in Fig. 8
Enlarged structure schematic diagram, with reference to Fig. 8 and Fig. 9, micro-structure 13 is the engraved structure on light guide plate mainboard 11, and micro-structure 13 is corresponding
Engraved structure can fill the gas materials such as nitrogen or air.First plane of reflection 1311 and second plane of reflection 1321 are
The interface of light guide plate mainboard 11 and gas material.In the embodiment of the present invention, micro-structure 13 is the hollow out on light guide plate mainboard 11
Structure to reduce the material utilization amount of backlight module 1, and alleviates the weight of backlight module 1.
Figure 10 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention, with reference to Figure 10, micro-structure 13
Reflective coating 14 including being set to first plane of reflection 1311 and second plane of reflection 1321.Reflective coating 14 may include
One layer or laminated reflective film, for improving the reflectivity of first plane of reflection 1311 and second plane of reflection 1321.At it
In his embodiment, micro-structure 13 may include metallic reflective material.Metallic reflective material reflectivity with higher, so as to
To improve the reflectivity of first plane of reflection 1311 and second plane of reflection 1321.Metallic reflective material for example may include silver
Or aluminium etc..
Figure 11 is a kind of light path schematic diagram of backlight module provided in an embodiment of the present invention, two neighboring micro- with reference to Figure 11
There are gaps between structure 13.Separate discrete setting between multiple micro-structures 13.Due to first plane of reflection of micro-structure 13
1311 and second the plane of reflection 1321 there is light reflex, it is more if spacing between two neighboring micro-structure 13 is 0
The successively contact arrangement of 13 head and the tail of a micro-structure, no longer there are the gap for allowing light to pass through between two neighboring micro-structure 13, by
It is only capable of being irradiated in micro-structure 13 in the ability for the light that light source 12 issues, and light guide plate main body 11 is reflected by micro-structure 13
Outside, lead to the light that will be unable to obtain sufficient intensity at remote position with light source 12, cause light guide plate main body 11 and light
Exiting light beam intensity is big at the position that source 12 is closer, light guide plate main body 11 and the output intensity at remote position of light source 12
It spends small, causes backlight illumination uneven.In the embodiment of the present invention, by being arranged between two neighboring micro-structure 13, there are gap, In
On the basis of realizing peep-proof effect, the uniformity of backlight illumination ensure that.
Optionally, with reference to Figure 11, the length in the gap between two neighboring micro-structure 13 is L, and L meets:
Wherein, vertical range of the H between first surface 111 and second surface 112, that is, H is first surface 111 and the
Vertical range between two surfaces flat part 1120.N is the refractive index of light guide plate mainboard 11.
Illustratively, with reference to Figure 11, the light that light source 12 issues is irradiated to the incidence of the side end face 113 of light guide plate mainboard 11
Angle is β1, the angle of emergence that the light that light source 12 issues is irradiated to the side end face 113 of light guide plate mainboard 11 is α1, what light source 12 issued
Light is α in the incidence angle of the first surface 111 of light guide plate mainboard 112(light that light source 12 issues is in light guide plate mainboard 11
The transmitting of first surface 111 total reflection), the angle of reflection light and first surface 111 after first surface 111 is totally reflected
For α3.As shown in Figure 11:
It is available by formula (1) and formula (2):
Illustratively, with reference to Figure 11, light source 12 is along being h, the hair of light source 12 perpendicular to the length on 111 direction of first surface
The half of angular is β4, L1For the vertical range between light source 12 and the side end face 113 of light guide plate mainboard 11.As shown in Figure 11:
H < H (4)
Illustratively, β4At=60 °, then
Figure 12 is the light path schematic diagram of another backlight module provided in an embodiment of the present invention, with reference to Figure 12, light source 12
In a side end face 113 of light guide plate mainboard 11.First plane of reflection 1311 is located at second plane of reflection in same micro-structure 13
Between 1321 and light source 12, the angle of first plane of reflection 1311 and first surface 111 is less than second plane of reflection 1321 and the
The angle on one surface 111.In the embodiment of the present invention, the angle of first plane of reflection 1311 and first surface 111 is anti-less than second
Penetrate the angle of plane 1321 Yu first surface 111, i.e. θ1Less than θ2, angular field of view corresponding with first plane of reflection 1311 is less than
Angular field of view corresponding with second plane of reflection 1321.All light sources 12 are also set to light guide plate mainboard by the embodiment of the present invention
11 same side end face 113, it is anti-that the light that light source 12 issues can be irradiated to first after the total reflection of first surface 111
It penetrates in plane 1311, the light that light source 12 issues also needs multiple reflections that could irradiate after the total reflection of first surface 111
Onto second plane of reflection 1321, therefore, the luminous intensity of big angular field of view side is greater than the luminous intensity for neglecting angular region side, i.e.,
There is lesser luminous intensity, view corresponding with second plane of reflection 1321 in angular field of view corresponding with first plane of reflection 1311
There is biggish luminous intensity, consequently facilitating the image shown in big visual angle unilateral observation display device in angular region.
Optionally, with reference to Figure 12, multiple micro-structures 13 are gradually increased with the increase with 12 distance of light source, density of setting.
Bigger with luminous intensity of the light source 12 at more near position, first plane of reflection 1311 and second plane of reflection 1321 are reflexed to and are led
Luminous intensity outside tabula rasa mainboard 11 is bigger；It is smaller with luminous intensity of the light source 12 at more distant positions, first plane of reflection 1311
The luminous intensity reflexed to outside light guide plate mainboard 11 with second plane of reflection 1321 is smaller.In the embodiment of the present invention, multiple micro-structures
13 gradually increase with the increase density of setting with 12 distance of light source, thus increasing at more distant positions with light source 12
The density of setting of one plane of reflection 1311 and second plane of reflection 1321, increases the light intensity being reflected into outside light guide plate mainboard 11
Degree, so that the exiting light beam intensity at each position of light guide plate mainboard 11 is balanced, so as to provide uniform photograph for display device
Mingguang City's beam.
Optionally, with reference to Figure 12,Wherein, n is
The refractive index of light guide plate mainboard 11, θ1For the angle of first plane of reflection 1311 and first surface 111, θ2For second plane of reflection
1321 with the angle of first surface 111, β1Entering for the side end face 113 of light guide plate mainboard 11 is irradiated to for the light that light source 12 issues
Firing angle, β2For the light that is reflected through second plane of reflection 1321 first surface 111 the angle of emergence.
Illustratively, with reference to Figure 12, the light that light source 12 issues is irradiated to the outgoing of the side end face 113 of light guide plate mainboard 11
Angle is α1, the light that light source 12 issues is α in the incidence angle of the first surface 111 of light guide plate mainboard 112(the light that light source 12 issues
Line emits total reflection in the first surface 111 of light guide plate mainboard 11), the reflection light after first surface 111 is totally reflected
Angle with first surface 111 is α3, light is α in the angle of reflection of second plane of reflection 13214, by second plane of reflection 1321
The incidence angle for reflexing to the light of first surface 111 is α5, as shown in Figure 12:
l·sinβ1=nsin α1 (5)
sinα2+sinα3=90 ° (6)
α1=α3 (7)
α3+α4+θ2=90 ° (8)
α1+2α4+θ5=90 ° (9)
n·sinα5=1sin β2 (10)
It is available by formula (5)-formula (10):
Figure 13 is the light path schematic diagram of another backlight module provided in an embodiment of the present invention, with reference to Figure 13,Wherein, n, θ1、θ2、β1And β2Meaning exist
This is repeated no more, β3For the light that is reflected through first plane of reflection 1311 first surface 111 the angle of emergence.
Illustratively, with reference to Figure 13, light is α in the angle of reflection of first plane of reflection 13116, by first plane of reflection
1311 incidence angles for reflexing to the light of first surface 111 are α7, as shown in Figure 13:
α6+90°-α7+θ1=90 ° (11)
α5+2α6+90°-α7=90 ° (12)
n·sinα7=1sin β3 (13)
It is available by formula (11), (12) (13) and formula (5)-formula (10):
Figure 14 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention, and Figure 15 mentions for the embodiment of the present invention
A kind of light path schematic diagram of the display device supplied, with reference to Figure 14 and Figure 15, display device 100 includes in any of the above-described embodiment
Backlight module 1 and liquid crystal display panel 2.Liquid crystal display panel 2 is located on the light direction of backlight module 1.Due to the present invention
The display device 100 that embodiment provides includes the backlight module 1 in any of the above-described embodiment, therefore provided in an embodiment of the present invention
The visible angular field of view in the side of display device 100 is greater than the visible angular field of view of the other side, to meet peep-proof demand.It is exemplary
Ground, the first side view angular region of display device 100 are Z1, and second side angular field of view of display device 100 is Z2.Z1 > Z2.In
In the range of first side view angular region Z1 and second side angular field of view Z2, user is observed that the image that display device 100 is shown,
Outside the range of the first side view angular region Z1 and second side angular field of view Z2, user can not observe that display device 100 is aobvious
The image shown enriches the application scenarios of peep-proof to realize peep-proof.Unlike existing common unilateral peep-proof, this
Peep-proof is realized by the visible visual angle difference of setting opposite sides in inventive embodiments, is had the advantage that in this way: if using
The visible display device in unilateral visual angle in the prior art, due to not showing image under 0 ° of visual angle, and user practises most of the time
It is used to the image (i.e. 0 ° of visual angle) shown in the direction observation display device with 2 place plane of vertical liquid crystal display panel, display
Device is set to user and is accustomed to mismatching, and causes user experience bad.In addition, display device brightness under big visual angle can reduce,
And the phenomenon that being easy to appear big visual angle colour cast.So the embodiment of the present invention provides a kind of new peep-proof design, and is based on this peep-proof
Design provide it is a kind of may be implemented the different display device in the visible visual angle of opposite sides, and there is display device under 0 ° of visual angle to show
Image as it can be seen that the advantages of user's habit is good and brightness is high, without colour cast.
Illustratively, with reference to Figure 14, display device 100 can also include diffusion sheet 3 and prismatic lens 4, diffusion sheet 3 and prism
Piece 4 is between backlight module 1 and liquid crystal display panel 2.Diffusion sheet 3 is between backlight module 1 and prismatic lens 4.
Figure 16 is a kind of preparation method flow chart of backlight module provided in an embodiment of the present invention, and Figure 17 is that the present invention is implemented
A kind of preparation process schematic diagram for backlight module that example provides, Figure 18 are another backlight module provided in an embodiment of the present invention
Preparation process schematic diagram with reference to Figure 16, Figure 17 and Figure 18, and combines and refers to Fig. 1-Figure 13, and the preparation method of backlight module includes:
S110, a light guide plate mainboard 11 is provided.
S120, multiple micro-structures 13 are formed in the second surface 112 of light guide plate mainboard 11.
Micro-structure 13 includes first plane of reflection 1311 and second plane of reflection 1321, first plane of reflection 1311 and second
The connection of the plane of reflection 1321 forms V-structure, and the angle of first plane of reflection 1311 and first surface 111 is anti-not equal to second
Penetrate the angle of plane 1321 Yu first surface 111.
S130, at least one light source 12 is set in at least partly side end face 113 of light guide plate mainboard 11.
Wherein, light guide plate mainboard 11 includes opposite first surface 111 and second surface 112, and connection first surface
111 and second surface 112 side end face 113.First surface 111 is the light-emitting surface of light guide plate mainboard 11, first plane of reflection
1311 and second plane of reflection, 1321 reflection source 12 expose at least partly light in light guide plate mainboard 11.
The preparation method of backlight module provided in an embodiment of the present invention is used to form backlight module in above-described embodiment, thus
With the identical beneficial effect of above-mentioned backlight module, that is, realize that the visible angular field of view in the side of display device is greater than the other side
It can be seen that angular field of view, to meet peep-proof demand.
Optionally, with reference to Figure 17, multiple 13 (i.e. steps of micro-structure are formed in the second surface 112 of light guide plate mainboard 11
S120) include:
S1211, a loading plate 5 is provided, the working face of loading plate 5 is provided with multiple micro-structures 13.
S1212, the second surface 112 that multiple micro-structures 13 are pressed into light guide plate mainboard 11 by loading plate 5, and will carrying
Plate 5 and multiple micro-structures 13 are removed.
Illustratively, the loading plate 5 for being provided with multiple micro-structures 13 can be aligned with light guide plate mainboard 11, and to carrying
Plate 5 heats, by the second surface 112 of multiple micro-structures 13 indentation light guide plate mainboard 11 in a manner of hot pressing.
Optionally, with reference to Figure 18, multiple 13 (i.e. steps of micro-structure are formed in the second surface 112 of light guide plate mainboard 11
S120) include:
S1221, multiple micro-structures 13 are formed in the second surface 112 of light guide plate mainboard 11, bulge-structure 110 corresponds
It is embedded in micro-structure 13.
Wherein, the second surface 112 of light guide plate mainboard 11 includes multiple bulge-structures 13.Illustratively, light guide plate mainboard
Multiple bulge-structures 13 can be formed by means such as etchings on 11 second surface 112.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts, be combined with each other and substitutes without departing from protection scope of the present invention.Therefore, although by above embodiments to this
Invention is described in further detail, but the present invention is not limited to the above embodiments only, is not departing from present inventive concept
In the case of, it can also include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (15)
1. a kind of backlight module characterized by comprising
Light guide plate mainboard, the light guide plate mainboard include opposite first surface and second surface, and connection first table
The side end face in face and the second surface；The first surface is the light-emitting surface of the light guide plate mainboard；
At least one light source, positioned at at least partly side end face of light guide plate mainboard；
Multiple micro-structures, positioned at the second surface of the light guide plate mainboard；The micro-structure includes first plane of reflection and second
The plane of reflection, first plane of reflection connect to form V-structure with second plane of reflection, and first plane of reflection
It is not equal to the angle of second plane of reflection and the first surface with the angle of the first surface, first reflection is flat
Face and second plane of reflection reflect at least partly light that the light source exposes in the light guide plate mainboard.
2. backlight module according to claim 1, which is characterized in that the micro-structure includes convex towards the first surface
The first protruding portion and the second protruding portion risen, first plane of reflection are that first protruding portion closes on second protruding portion
Side and the surface contacted with the light guide plate mainboard, second plane of reflection are that second protruding portion closes on described first
Protruding portion side and the surface contacted with the light guide plate mainboard；First protruding portion and second protruding portion form V-type
Groove.
3. backlight module according to claim 2, which is characterized in that the micro-structure further includes and first protruding portion
And the body part of the second protruding portion connection, the body part include dashing forward far from first protruding portion and described second
The third plane in portion out, the second surface include the second surface flat part parallel with the first surface；The third is flat
Face is concordant with the second surface flat part.
4. backlight module according to claim 2, which is characterized in that the micro-structure further includes and first protruding portion
And the body part of the second protruding portion connection, the body part include dashing forward far from first protruding portion and described second
The fourth plane in portion out, the second surface include the second surface flat part parallel with the first surface；Described Siping City
Vertical range between face and the first surface is greater than vertical between the second surface flat part and the first surface
Distance.
5. backlight module according to claim 1, which is characterized in that there are gaps between the two neighboring micro-structure.
6. backlight module according to claim 5, which is characterized in that the length in the gap between the two neighboring micro-structure
Degree is L, and L meets:
Wherein, vertical range of the H between the first surface and the second surface, n are the refraction of the light guide plate mainboard
Rate.
7. backlight module according to claim 1, which is characterized in that the micro-structure includes solid material；The backlight
Mould group further includes being located at micro-structure substrate of the multiple micro-structure far from light guide plate mainboard side, the multiple micro-structure
It is connected as one by the micro-structure substrate.
8. backlight module according to claim 1, which is characterized in that the micro-structure includes being set to first reflection
The reflective coating of plane and second plane of reflection；Alternatively,
The micro-structure includes metallic reflective material.
9. backlight module according to claim 1, which is characterized in that the light source is located at the side of the light guide plate mainboard
End face；
First plane of reflection is located between second plane of reflection and the light source in the same micro-structure；
The angle of first plane of reflection and the first surface is less than second plane of reflection and the first surface
Angle.
10. backlight module according to claim 9, which is characterized in that multiple micro-structures with the light source away from
From increase, density of setting gradually increases.
11. backlight module according to claim 9, which is characterized in that
Wherein, n is the refractive index of the light guide plate mainboard, θ1For the angle of first plane of reflection and the first surface, θ2
For the angle of second plane of reflection and the first surface, β1The light issued for the light source is irradiated to the light guide plate
The incidence angle of the side end face of mainboard, β2The angle of emergence for being the light that is reflected through second plane of reflection in the first surface, β3
For the light that is reflected through first plane of reflection the first surface the angle of emergence.
12. a kind of display device, which is characterized in that including the described in any item backlight modules of claim 1~11 and liquid crystal
Display panel；The liquid crystal display panel is located on the light direction of the backlight module.
13. a kind of preparation method of backlight module characterized by comprising
One light guide plate mainboard is provided；
Multiple micro-structures are formed in the second surface of the light guide plate mainboard, the micro-structure includes first plane of reflection and second
The plane of reflection, first plane of reflection connect to form V-structure with second plane of reflection, and first plane of reflection
It is not equal to the angle of second plane of reflection and the first surface with the angle of first surface；
In at least partly side end face of the light guide plate mainboard, at least one light source is set；
Wherein, the light guide plate mainboard includes the opposite first surface and the second surface, and connection described first
The side end face on surface and the second surface；The first surface is the light-emitting surface of the light guide plate mainboard, first reflection
Plane and second plane of reflection reflect at least partly light that the light source exposes in the light guide plate mainboard.
14. preparation method according to claim 13, which is characterized in that the second surface in the light guide plate mainboard
Forming multiple micro-structures includes:
A loading plate is provided, the working face of the loading plate is provided with multiple micro-structures；
Multiple micro-structures are pressed into the second surface of the light guide plate mainboard by the loading plate, and by the loading plate
It is removed with multiple micro-structures.
15. preparation method according to claim 13, which is characterized in that the second surface in the light guide plate mainboard
Forming multiple micro-structures includes:
The second surface of the light guide plate mainboard includes multiple bulge-structures；
Multiple micro-structures are formed in the second surface of the light guide plate mainboard, the bulge-structure corresponds insertion micro-structure
It is interior.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910796282.3A CN110501844B (en) | 2019-08-27 | 2019-08-27 | Backlight module, display device and preparation method of backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910796282.3A CN110501844B (en) | 2019-08-27 | 2019-08-27 | Backlight module, display device and preparation method of backlight module |
Publications (2)
| Publication Number | Publication Date |
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| CN110501844A true CN110501844A (en) | 2019-11-26 |
| CN110501844B CN110501844B (en) | 2022-05-17 |
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ID=68589809
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910796282.3A Active CN110501844B (en) | 2019-08-27 | 2019-08-27 | Backlight module, display device and preparation method of backlight module |
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| Country | Link |
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| CN112002217A (en) * | 2020-09-10 | 2020-11-27 | 上海中航光电子有限公司 | Splicing type backlight module and display device |
| WO2024000327A1 (en) * | 2022-06-29 | 2024-01-04 | 京东方科技集团股份有限公司 | Backlight module and display apparatus |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110501844B (en) | 2022-05-17 |
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