CN108646467A - Backlight module, liquid crystal display and virtual reality show the helmet - Google Patents
Backlight module, liquid crystal display and virtual reality show the helmet Download PDFInfo
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- CN108646467A CN108646467A CN201810701117.0A CN201810701117A CN108646467A CN 108646467 A CN108646467 A CN 108646467A CN 201810701117 A CN201810701117 A CN 201810701117A CN 108646467 A CN108646467 A CN 108646467A
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The present invention relates to display screen and technical field of virtual reality, and the helmet is shown in particular to a kind of backlight module, liquid crystal display and virtual reality.The backlight module includes light source module group, the first extension panel, the second extension panel and orientation diffusion module.First extension panel and the second extension panel include it is multiple can thoroughly can antiplane mirror.The collimation or nearly collimated illumination light beam of light source module group offer are respectively after the first extension panel and the second extension panel progress vertically and horizontally are transmitted and extended, it forms collimation angle pencil of ray or closely collimates angle pencil of ray, orientation diffusion module vertically and horizontally controls the emergent light beam angle of output light according to being preset in, to which the efficiency of light energy utilization of backlight module greatly improved, reduce energy consumption and reduce the generation of stray light.The liquid crystal display and virtual reality show that the helmet includes above-mentioned backlight module.
Description
Technical field
The present invention relates to display screen and technical field of virtual reality, in particular to a kind of backlight module, liquid crystal display
Screen and virtual reality show the helmet.
Background technology
The virtual content of the virtual reality display helmet, which is shown, to be mainly made of display screen and optical amplifier microscope group, normal conditions
Under, display screen is generally liquid crystal display.The display effect of liquid crystal display has wide viewing angle characteristics, it can generally reach 160~
170 degree.When the display screen with wide viewing angle shows the helmet for virtual reality, in 30~50 degree of visual angles usually only therein
Light beam can be received by user.As shown in Figure 1, the P1 points and P2 points on liquid crystal display only have the light of A and B area respectively
Light beam can be received by human eye.And the space internal cause that the light beam in remaining visual angle is constituted in display screen and optical amplifier microscope group dissipates
Penetrate, catadioptric acts on forming stray light, influence reception of the user to virtual reality content.Also, the display screen energy of wide viewing angle
The increase of power consumption can be led to by measuring the inefficiencies utilized.
Invention content
In view of this, the backlight module that the purpose of the present invention is to provide a kind of with smaller visible angle, liquid crystal display
Screen and virtual reality show the helmet, to solve the above problems.
To achieve the above object, the present invention provides the following technical solutions：
Present pre-ferred embodiments provide a kind of backlight module, including light source module group, the first extension panel, the second expanding surface
Plate and orientation diffusion module, the first extension panel and the second extension panel include it is multiple can thoroughly can antiplane mirror；
The light source module group is located in the input path that described first extends panel, and the second extension panel is located at described
On the emitting light path of first extension panel, the orientation diffusion module is located on the emitting light path that described second extends panel；
The collimation or nearly collimated illumination light beam that the light source module group provides extend panel and second by described first respectively
Extension panel progress vertically and horizontally is transmitted and after extension, forms collimation angle pencil of ray or closely collimate angle pencil of ray, institute
Orientation diffusion module is stated according to the emergent light beam angle for being preset in vertically and horizontally control output light.
Optionally, described first extension each of panel can thoroughly can the reflected energy of antiplane mirror tend to be identical, and it is described
First extension panel it is all can thoroughly can antiplane mirror reflected energy and tend to light source module group outgoing total light energy, and
Each can thoroughly can antiplane mirror reflectivity and transmittance and be 1.
Optionally, it is described first extension panel be it is multiple can thoroughly can antiplane mirror arrange in the Y direction, second expanding surface
Plate be it is multiple can thoroughly can antiplane mirror arranged in X-direction, then W=(H+He)/2；
Wherein, W be it is two neighboring can thoroughly can be between antiplane mirror spacing along the Y direction；H is first expanding surface
Spacing between the lower planes of plate along the X direction；He be can thoroughly can antiplane mirror effective optics bore height along the X direction
Degree.
Optionally, it is described first extension panel be it is multiple can thoroughly can antiplane mirror arrange in the Y direction, first expanding surface
Plate it is multiple can thoroughly can each in antiplane mirror can thoroughly can the angle of antiplane mirror and Y-direction be 45 degree.
Optionally, it is described first extension panel vertical direction control output light emergent light beam angle be 0 ° to 30 ° it
Between, it is described second extension panel control in the horizontal direction output light emergent light beam angle be 0 ° to 30 ° between.
Optionally, it is described first extension panel vertical direction control output light emergent light beam angle be 0 ° to 20 ° it
Between, it is described second extension panel control in the horizontal direction output light emergent light beam angle be 0 ° to 40 ° between.
Optionally, the orientation diffusion module is bidirectional oriented diffusion barrier, or is orthogonally located bicylinder lens array,
Or it is orthogonally located unidirectional orientation diffusion barrier.
Another preferred embodiment of the present invention provides a kind of liquid crystal display, including liquid crystal display panel and above-mentioned backlight module.
Another preferred embodiment of the present invention provides a kind of virtual reality display helmet, including above-mentioned liquid crystal display.
The backlight module that present pre-ferred embodiments provide passes through to light source module group, the first extension panel, the second expanding surface
The integrated and design of plate and orientation diffusion module, the light that light source module group is exported using the first extension panel and the second extension panel
The extension of Shu Jinhang vertically and horizontally beam sizes of both direction, therefore light source module group is without exporting collimation angle pencil of ray or close accurate
Straight angle pencil of ray so that the optical system structure of light source module group is simpler, meanwhile, output light is controlled using orientation diffusion module
Emergent light beam angle is smaller, to which the efficiency of light energy utilization of backlight module greatly improved, reduce energy consumption and reduce the generation of stray light.
The liquid crystal display and virtual reality that present pre-ferred embodiments provide show that the helmet includes above-mentioned backlight module, because
And there is similar advantageous effect.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described.It should be appreciated that the following drawings illustrates only certain embodiments of the present invention, therefore it is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the wide viewing angle display schematic diagram for the display screen that existing virtual reality shows the helmet.
Fig. 2 is a kind of structural schematic diagram for backlight module that present pre-ferred embodiments provide.
Fig. 3 is a kind of structural schematic diagram for light source module group that present pre-ferred embodiments provide.
Fig. 4 is the structural schematic diagram for another light source module group that present pre-ferred embodiments provide.
Fig. 5 is the schematic diagram that the first extension panel shown in Fig. 2 is transmitted light and extends.
When Fig. 6 is that the first extension panel is unsatisfactory for condition, there are the schematic diagrames of no light zone between the light beam of output.
When Fig. 7 is that the first extension panel is unsatisfactory for condition, there are the schematic diagrames of overlay region between the light beam of output.
Fig. 8 be the first extension panel it is multiple can thoroughly can each in antiplane mirror can thoroughly can antiplane mirror and Y-direction
Angle is non-45 degree of schematic diagram.
Fig. 9 is the optical imagery state that a kind of virtual reality shows the helmet.
Figure 10 is the optical imagery state that another virtual reality shows the helmet.
Figure 11 be first extension each of panel can thoroughly can antiplane mirror and Y-direction angle number figure.
Figure 12 is the optical imagery state that another virtual reality shows the helmet.
Figure 13 is a kind of structural schematic diagram for liquid crystal display that present pre-ferred embodiments provide.
Icon:10- backlight modules；11- light source module groups；13- first extends panel；15- second extends panel；17- is oriented
Spread module；111- lighting sources；113- beam shaping bundling devices；1111- red LED light sources；1112- green LED light sources；
1113- blue led light sources；1131- collimator and extender shaping components；1133- combined beam units；11311- the first collimator and extender shaping lists
Member；11312- the second collimator and extender shaping units；11313- third collimator and extender shaping units；114- light emitting units；115-
Optical collimator；116- combiner devices；117- couples optical fiber；118- collimates microscope group；119- dissipation spot devices；1- liquid crystal displays；
19- liquid crystal display panels.
Specific implementation mode
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 describes.Obviously, described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.It is logical
The component for the embodiment of the present invention being often described and illustrated herein in the accompanying drawings can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiment of the present invention, people in the art
The every other embodiment that member is obtained without making creative work, shall fall within the protection scope of the present invention.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.In description of the invention
In, term " first ", " second ", " third ", " the 4th " etc. are only used for distinguishing description, and should not be understood as only or imply opposite
Importance.
Referring to FIG. 2, Fig. 2 is a kind of schematic diagram for backlight module 10 that present pre-ferred embodiments provide.Such as Fig. 2 institutes
Show, the backlight module 10 includes：Light source module group 11, first extends panel 13, second and extends panel 15 and orientation diffusion module
17。
Light source module group 11 is located in the input path of the first extension panel 13, is that the first extension panel 13 provides collimation or close
Collimated illumination light beam.Light source module group 11 can be mainly by LED (Light Emitting Diode light emitting diodes) light sources or LD
(Laser Diode laser diodes) light source is constituted with collimation lens set, can also be mainly by optical fiber source and collimation lens set
It constitutes.
For example, as shown in figure 3, when light source module group 11 is mainly by LED (Light Emitting Diode light emitting diodes)
When light source is constituted with collimation lens set, light source module group 11 may include lighting source 111 and beam shaping bundling device 113.Illumination
Laser light source, LED light source etc. may be used in light source 111.Optionally, in the present embodiment, which is LED light
Source, the LED light source may include red LED light source 1111, green LED light source 1112 and blue led light source 1113.In another reality
It applies in mode, the color of each LED can be configured according to actual needs in LED light source, to meet the needs of actual conditions,
It is not limited herein.Beam shaping bundling device 113 is set in the light path of lighting source 111, for being sent out to lighting source 111
Light beam carry out collimator and extender shaping, close beam processing.Optionally, in the present embodiment, beam shaping bundling device 113 includes standard
Direct expansion beam shaping component 1131 and combined beam unit 1133.Collimator and extender shaping component 1131 includes the first collimator and extender shaping unit
11311, the second collimator and extender shaping unit 11312 and third collimator and extender shaping unit 11313.Wherein, the first collimator and extender
Shaping unit 11311 is used to carry out collimator and extender Shape correction to the light beam that red LED light source 1111 is sent out.Second collimator and extender
Shaping unit 11312 is used to carry out collimator and extender Shape correction to the light beam that green LED light source 1112 is sent out.Third collimator and extender
Shaping unit 11313 is used to carry out collimator and extender Shape correction to the light beam that blue led light source 1113 is sent out.Under normal conditions,
First collimator and extender shaping unit 11311, the second collimator and extender shaping unit 11312 and third collimator and extender shaping unit
11313 alignment precision may be required in several milliradians.Combined beam unit 1133 will be for that will pass through the first collimator and extender shaping list
First 11311, second collimator and extender shaping unit 11312 and 11313 collimator and extender Shape correction of third collimator and extender shaping unit
Light beam afterwards synthesizes single beam.Optionally, combined beam unit 1133 is x-cube type light-combining prisms.
In another example as shown in figure 4, when light source module group 11 is mainly made of optical fiber source and collimation lens set, light source die
Group 11 may include light emitting unit 114, optical collimator 115, combiner device 116, coupling optical fiber 117 and collimation microscope group 118.Light
Laser light source, LED light source etc. may be used in transmitter unit 114.Optionally, in the present embodiment, which is LD
Laser light source, such as generating device of laser.The laser beam emitting device can wrap fast red laser transmitter unit, green laser transmitting list
Member and blue laser light emission unit.In other embodiments, the color of each laser emission element can in generating device of laser
To be configured according to actual needs, to meet the needs of actual conditions, it is not limited herein.Optical collimator 115 can be selected
It is optical collimation lens in known technology, the angle of divergence for reducing the light beam emitted by generating device of laser.Combiner device
116 can select the light-combining prism in known technology, not illustrate herein.Coupling optical fiber 117 can be multimode fibre or
Single mode optical fiber.The input terminal of coupling optical fiber 117 can melt globe lens, the laser that can be coupled for increasing coupling optical fiber 117
The bore of light beam so that the combined beam light beam after combiner device 116 is easy to be coupled into coupling optical fiber 117.Couple optical fiber 117
Output end can process tapered, the waist radius for reducing output end outgoing beam increases the numerical aperture of outgoing beam
Diameter so that coupling optical fiber 117 exports the light beam of the big angle of emergence of small light spot.Collimate what microscope group 118 was used to export coupling optical fiber 117
The light beam of the big angle of emergence of small light spot is collimated, to obtain the preferable collimated light beam of directionality or nearly collimated light beam.Normal conditions
Under, after collimating microscope group 118, collimated light beam or nearly collimated light beam of the shooting angle within the scope of 0 °~0.5 ° can be obtained.
In specific implementation, the focal plane position or attached with a tight waist for being located at collimation microscope group 118 for the light beam that setting coupling optical fiber 117 exports
Closely, to obtain collimated light beam or nearly collimated light beam.When light emitting unit 114 is laser light source, light source module group 11 can be with
Including dissipation spot device 119.Dissipation spot device 119 is by changing the instantaneous phase of laser to interfere the relevant spy of laser beam
Property, to weaken speckle effect existing for laser so that the beam energy that light source module group 11 provides is more evenly distributed.Dissipation spot device
Part 119 can select liquid crystal phase modulator or vibration phase plate in known technology, not be limited herein.
First extension panel 13 for being extended the light beam transmitted from light source module group 11 in the Y direction.Second expanding surface
Plate 15 is used to be extended the light beam transmitted from the first extension panel 13 in X-direction.Finally, light source module group 11 is by the first extension
Panel 13 and second extends 15 co-extensive of panel for collimation angle pencil of ray or closely collimates angle pencil of ray.
Due to second extension panel 15 with first extension panel 13 it is similar or identical, for saving length, below only with
It illustrates, has for the second extension panel 15 same or analogous with the first extension panel 13 for first extension panel 13
Conclusion.
First extension panel 13 can be by it is multiple can thoroughly can the array element that arranges in the Y direction of antiplane mirror.Individually may be used
Thoroughly can antiplane mirror and Y-direction there is certain angle.It is multiple can thoroughly can antiplane mirror reflectivity it is different, as shown in figure 5,
First extension panel 13 by n can thoroughly can antiplane mirror arrange, can thoroughly can be anti-close to first of 11 side of light source module group
Plane mirror is denoted as 13-1, along Y negative directions sequence note can thoroughly can antiplane mirror be 13-2,13-3 ..., 13-i, the last one
Can thoroughly can antiplane mirror be denoted as 13-n, and 13-i reflectivity is denoted as Ti, transmittance is denoted as Ri, and not considering herein can be saturating
Can antiplane mirror absorption loss, can release 13-i can thoroughly can the reflected energy of antiplane mirror be E1=R1*E, Ei=T1*
T2*……*Ti-1*Ri*E(i≥2).Wherein, E is the total light energy being emitted from light source module group 11, to make the first extension panel
The light beams of 13 outgoing obtain higher uniformities and higher capacity usage ratio, it is multiple can thoroughly can antiplane mirror reflectivity and thoroughly
It penetrates than following condition need to be met：
Ei-Ej → 0, i ≠ j, i=1：N, j=1：n (1)
Ti+Ri=1, i=1：n (3)
In other words, described first extension each of panel 13 can thoroughly can the reflected energy of antiplane mirror tend to be identical, and
It is described first extension panel 13 it is all can thoroughly can antiplane mirror reflected energy and tend to light source module group 11 outgoing total luminous energy
Amount, and each can thoroughly can antiplane mirror reflectivity and transmittance and be 1.
It is multiple can thoroughly can each in antiplane mirror can thoroughly can the angle of antiplane mirror and Y-direction be 45 degree.
In this way, light source module group 11 is extended to a collimation by the first extension panel 13 or closely collimates angle pencil of ray.It is following when meeting
When condition, the light beam that the first extension panel 13 exports after extending has higher optical uniformity and is not in light beam saltus step.
W=(H+He)/2 (4)
Wherein, W be it is two neighboring can thoroughly can be between antiplane mirror spacing along the Y direction；H is the first extension panel 13
The spacing between lower planes along the X direction；He be can thoroughly can antiplane mirror effective optics bore height along the X direction
Degree.
As shown in fig. 6, working as W>(H+He)/2 when, it is two neighboring can thoroughly can antiplane mirror output light beam between there are one
There is the saltus step of light beam in unglazed region.
As shown in fig. 7, working as W<(H+He)/2 when, it is two neighboring can thoroughly can antiplane mirror output light beam between there are one
Overlay region will appear the increase of light energy in this overlay region, the final uniformity for influencing output beam.
As shown in figure 8, the first extension panel 13 it is multiple can thoroughly can each in antiplane mirror can thoroughly can antiplane mirror and Y
The angle in direction can be β 1, and wherein β 1 is non-45 degree and belongs to 0~90 degree of random angle angle value.It at this time can be by around the side Y
To the first extension panel 13 of rotation and 11 certain angle β 2 of light source module group so that the extension light beam that the first extension panel 13 exports is hung down
Directly the second extension panel 15 is incident in the input face of the second extension panel 15.
First extension panel 13 it is multiple can thoroughly can in antiplane mirror individually can thoroughly can the angle of antiplane mirror and Y-direction can
With different.According to display screen, the magnitude relationship of optics display module, virtual reality shows that the optical imagery state of the helmet exists
Three kinds.
As shown in figure 9, the first state, by pixel such as the point P5, point P4 of proximal edge, outgoing can be connect by human eye
Angle α 5, α 4 between central axis L z5, Lz4 of the cone of beam of receipts and the normal Lc of display screen is minimum, can approximately think two
Person is consistent, and under this state, multiple in setting the first extension panel 13 can thoroughly can thoroughly can antiplane mirror and Y in antiplane mirror
The angle in direction is all consistent, and the angle pencil of ray that the second extension panel 15 is emitted is allowed to enter orientation diffusion with vertical or close vertical direction
Module 17, so as to obtain the stray light of high-energy utilization rate and minimum.
As shown in Figure 10, second of state, by pixel such as the point P5, point P4 of proximal edge, outgoing can be by human eye
Angle α 5, α 4 between central axis L z5, Lz4 of the cone of beam of reception and the normal Lc of display screen is bigger, and closer to edge
This angle meeting bigger, the variation from the center of display screen to edge is from low to high.Therefore, it is the profit for preferably improving energy
With efficiency, can be respectively set in the first extension panel 13 it is multiple can thoroughly can in antiplane mirror individually can thoroughly can antiplane mirror with
The angle of Y-direction is different, and multiple in the second extension panel 15 can thoroughly can individually can thoroughly can antiplane mirror and the side X in antiplane mirror
To angle it is different.As shown in figure 11, for the first extension panel 13, first extension each of panel 13 can thoroughly can antiplane
Mirror and the angle of Y-direction carry out number consecutively, by 13-1 can thoroughly can the angle of antiplane mirror and Y-direction be denoted as β 131, will
13-2 can thoroughly can the angle of antiplane mirror and Y-direction be denoted as β 132 ... ..., can thoroughly can be anti-by the last one i.e. 13-n
Plane mirror and the angle of Y-direction are denoted as β 13n.
When n is odd number, then it is intermediate can thoroughly can the number of antiplane mirror beThe angle of itself and Y-direction is denoted asPreferably to improve the utilization ratio of energy, it is each can thoroughly can the angle of antiplane mirror and Y-direction meet following condition：
……
When n is even number, then intermediate two can thoroughly can the number of antiplane mirror be respectivelyWithItself and Y
The angle in direction is denoted asWithPreferably to improve the utilization ratio of energy, it is each can thoroughly can antiplane mirror and the side Y
To angle meet following condition：
……
As shown in figure 12, the third state, it is similar to second of state, by pixel such as the point P5, point P4 of proximal edge,
Outgoing can be compared by angle α 5, the α 4 between central axis L z5, Lz4 of cone of beam that human eye receives and the normal Lc of display screen
It is larger, and closer to this angle of edge meeting bigger, but the numerical symbol of the angle is opposite.Similarly, in the way of Figure 11
In one extension panel 13 it is each can thoroughly can the angle of antiplane mirror and Y-direction be numbered.
When n is odd number, then it is intermediate can thoroughly can the number of antiplane mirror beThe angle of itself and Y-direction is denoted asPreferably to improve the utilization ratio of energy, it is each can thoroughly can the angle of antiplane mirror and Y-direction meet following condition：
……
When n is even number, then intermediate two can thoroughly can the number of antiplane mirror be respectivelyWithItself and Y
The angle in direction is denoted asWithPreferably to improve the utilization ratio of energy, it is each can thoroughly can antiplane mirror and the side Y
To angle meet following condition：
……
Orientation diffusion module 17 is arranged on the emitting light path of the second extension panel 15, to have specific angle to incident beam
Spend the optical film material of diffusion.Orientation diffusion module 17 is for expanding outgoing beam in two mutually orthogonal directions
It dissipating, emergent ray is after orientation diffusion module 17 is spread, between the diffusion angle in vertical direction Y-direction is 0 ° to 30 °,
The diffusion angle in X-direction is 0 ° to 30 ° in the horizontal direction, can also be that diffusion angle in two directions is different, e.g.,
It is bigger in vertical direction Y motion range than pupil in horizontal X direction motion range for pupil of human, orientation diffusion module can be set
17 diffusion angle in vertical direction Y-direction be 0 ° to 20 °, while in the horizontal direction the diffusion angle in X-direction be 0 ° extremely
40°。
Orientation diffusion module 17 can be orthogonally located bicylinder lens array or bidirectional oriented diffusion barrier or orthogonal put
The unidirectional orientation diffusion barrier set.Unidirectional orientation diffusion barrier usually can be have on film substrate in certain fractions distribution or
Sequence is placed with the film of microtrabeculae lens arrangement, and the semicircle bulb diameter of microlens structure can be between a few micrometers to hundred microns.
Bidirectional oriented diffusion barrier is usually that there is in certain fractions distribution or sequence to be placed with microlens structure on film substrate
The semicircle bulb diameter of film, microlens structure can be between a few micrometers to hundred microns.
In order to reduce volume, orientation diffusion module 17 can be bonded with the second extension panel 15.
The backlight module 10 that present pre-ferred embodiments provide to light source module group 11, first by extending panel 13, second
The integrated and design for extending panel 15 and orientation diffusion module 17 extends panel 15 to light using the first extension panel 13 and second
The light beam that source module 11 exports carries out the extension of the vertically and horizontally beam size of both direction, therefore light source module group 11 is without defeated
Going out to collimate angle pencil of ray or closely collimates angle pencil of ray so that the optical system structure of light source module group 11 is simpler, meanwhile, expanded using orientation
The emergent light beam angle for dissipating the control output light of module 17 is smaller, to which the efficiency of light energy utilization, the drop of backlight module 10 greatly improved
Low energy consumption and the generation for reducing stray light.
Please refer to Fig.1 3, another preferred embodiment of the present invention also provides a kind of liquid crystal display 1, including liquid crystal display panel 19 and
Above-mentioned backlight module 10.
Liquid crystal display panel 19 is usually made of polaroid, colored filter, liquid crystal molecule, thin film transistor (TFT) and polaroid.
In order to reduce volume, liquid crystal display panel 19, orientation diffusion module 17 and second extend panel 15 can two-by-two or three
It is bonded to each other.
The liquid crystal display 1 that present pre-ferred embodiments provide includes above-mentioned backlight module 10, thus is had with similar
Beneficial effect.
Liquid crystal display 1 provided in an embodiment of the present invention can be applied in the lower field of field angle to liquid crystal display 1
It closes.For example, virtual reality shows that the liquid crystal display 1 in the helmet does not need higher field angle, thus the liquid crystal display 1 can
The helmet is shown to be applied to virtual reality.
Another preferred embodiment of the present invention also provides a kind of virtual reality display helmet, including above-mentioned liquid crystal display 1.
The virtual reality that present pre-ferred embodiments provide shows that the helmet includes above-mentioned liquid crystal display 1, thus has class
As advantageous effect, that is, improve the efficiency of light energy utilization, reduce energy consumption and reduce stray light generation.
Any feature disclosed in this specification (including any accessory claim, abstract and attached drawing), except non-specifically chatting
It states, can be replaced by other alternative features that are equivalent or have similar purpose.That is, unless specifically stated, each feature is only
It is an example in a series of equivalent or similar characteristics.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of backlight module, which is characterized in that expand including light source module group, the first extension panel, the second extension panel and orientation
Dissipate module, the first extension panel and the second extension panel include it is multiple can thoroughly can antiplane mirror；
The light source module group is located in the input path that described first extends panel, and the second extension panel is located at described first
On the emitting light path for extending panel, the orientation diffusion module is located on the emitting light path that described second extends panel；
The collimation or nearly collimated illumination light beam that the light source module group provides extend panel and the second extension by described first respectively
Panel progress vertically and horizontally is transmitted and after extension, forms collimation angle pencil of ray or closely collimate angle pencil of ray, described fixed
To diffusion module according to the emergent light beam angle for being preset in vertically and horizontally control output light.
2. backlight module according to claim 1, which is characterized in that each of described first extension panel counter can be put down thoroughly
The reflected energy of face mirror tends to be identical, and it is described first extension panel it is all can thoroughly can antiplane mirror reflected energy and become
In light source module group outgoing total light energy, and each can thoroughly can antiplane mirror reflectivity and transmittance and be 1.
3. backlight module according to claim 2, which is characterized in that the first extension panel counter can be put down thoroughly to be multiple
Face mirror arranges in the Y direction, it is described second extension panel be it is multiple can thoroughly can antiplane mirror X-direction arrange, then W=(H+He)/
2；
Wherein, W be it is two neighboring can thoroughly can be between antiplane mirror spacing along the Y direction；H is first extension panel edge
The spacing between the lower planes of X-direction；He be can thoroughly can antiplane mirror effective optics bore height along the X direction.
4. backlight module according to claim 1, which is characterized in that the first extension panel counter can be put down thoroughly to be multiple
Face mirror arranges in the Y direction, the first extension panel it is multiple can thoroughly can each in antiplane mirror can thoroughly can antiplane mirror and Y
The angle in direction is 45 degree.
5. backlight module according to claim 1, which is characterized in that the first extension panel controls defeated in vertical direction
Between the emergent light beam angle for going out light is 0 ° to 30 °, the second extension panel controls the outgoing of output light in the horizontal direction
Between beam angle is 0 ° to 30 °.
6. backlight module according to claim 1, which is characterized in that the first extension panel controls defeated in vertical direction
Between the emergent light beam angle for going out light is 0 ° to 20 °, the second extension panel controls the outgoing of output light in the horizontal direction
Between beam angle is 0 ° to 40 °.
7. according to claim 1-6 any one of them backlight modules, which is characterized in that the orientation diffusion module is two-way fixed
To diffusion barrier, or it is orthogonally located bicylinder lens array, or is orthogonally located unidirectional orientation diffusion barrier.
8. a kind of liquid crystal display, which is characterized in that including liquid crystal display panel and claim 1-7 any one of them backlight moulds
Group.
9. liquid crystal display according to claim 8, which is characterized in that the liquid crystal display panel, orientation diffusion module and the
Two extension panels are bonded to each other.
10. a kind of virtual reality shows the helmet, which is characterized in that including liquid crystal display according to any one of claims 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810701117.0A CN108646467A (en) | 2018-06-29 | 2018-06-29 | Backlight module, liquid crystal display and virtual reality show the helmet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810701117.0A CN108646467A (en) | 2018-06-29 | 2018-06-29 | Backlight module, liquid crystal display and virtual reality show the helmet |
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| CN108646467A true CN108646467A (en) | 2018-10-12 |
Family
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| CN201810701117.0A Pending CN108646467A (en) | 2018-06-29 | 2018-06-29 | Backlight module, liquid crystal display and virtual reality show the helmet |
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