CN108646337A - Side incidence type light guide plate and backlight module - Google Patents
Side incidence type light guide plate and backlight module Download PDFInfo
- Publication number
- CN108646337A CN108646337A CN201810644208.5A CN201810644208A CN108646337A CN 108646337 A CN108646337 A CN 108646337A CN 201810644208 A CN201810644208 A CN 201810644208A CN 108646337 A CN108646337 A CN 108646337A
- Authority
- CN
- China
- Prior art keywords
- guide plate
- light guide
- type
- light
- incidence
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The present invention relates to a kind of side incidence type light guide plates, belong to light guide plate technical field.The side incidence type light guide plate includes incidence surface, dot surface, light-emitting surface, anti-incidence surface and two sides；The light that LED light source is sent out is coupled into the side incidence type light guide plate from the incidence surface, the anti-incidence surface is oppositely arranged with the incidence surface, the dot surface and the light-emitting surface are oppositely arranged, described two sides are oppositely arranged, multiple basic V-type grooves or multiple arcs groove are provided on the incidence surface, and the basic V-type groove or the arc groove are through to the dot surface from the light-emitting surface.The embodiment of the present invention on incidence surface by being arranged multiple basic V-type grooves or multiple arcs groove, the distribution angle after being optically coupled into edge-type light guide plate can be increased, light can be increased and enter the open angle after edge-type light guide plate, and then lamp shadow phenomenon can be weakened.
Description
Technical field
The present invention relates to light guide plate technical field more particularly to a kind of side incidence type light guide plates and backlight module.
Background technology
Planar light source (the backlight module of flat lamp or liquid crystal display (LCD, Liquid Crystal Display)
The major optical component of (BLU, Back Light Unit) is configured to LED light source, light guide plate (LGP, Light Guide
Plate), reflector plate, diffusion sheet or prismatic lens.LED light source is a kind of point light source pattern, need to usually apply plurality of LEDs and arrange
As a straight line, LED quantity is according to depending on different product specification demands, with Catching-rabbits spacing then according to light guide plate light inputting end face length
It is uniformly distributed.Therefore, when two LED apart from it is close when, the light that two point light sources are sent out can mutually overlap, and be optically coupled into leaded light
Light can be evenly distributed after plate；When two LED are apart from too far, the light that two point light sources are sent out does not overlap, and is optically coupled into light guide plate
Afterwards, comparison of light and shade is will produce, that is, will produce lamp shadow phenomenon.Solve the problems, such as that lamp shadow is always the particularly important development skill in this field
Art.
The incidence surface of current side incidence type light guide plate is planar structure, in that case, is used when matched
Two LED in LED light source at a distance of it is distant when, lamp shadow phenomenon is than more serious.
Based on this, the prior art is really to be improved.
Invention content
In order to solve the above technical problems, the present invention provides a kind of side incidence type light guide plate, specific technical solution is as follows：
The present invention provides a kind of side incidence type light guide plate, the side incidence type light guide plate includes incidence surface, dot surface, goes out
Smooth surface, anti-incidence surface and two sides；The light that LED light source is sent out is coupled into the side incidence type light guide plate from the incidence surface,
The anti-incidence surface is oppositely arranged with the incidence surface, and the dot surface and the light-emitting surface are oppositely arranged, described two sides
Be oppositely arranged, be provided with multiple basic V-type grooves or multiple arcs groove on the incidence surface, and the basic V-type groove or
The arc groove is through to the dot surface from the light-emitting surface.
Optionally, be provided with multiple enhancing V-type grooves in the basic V-type groove, the enhancing V-type groove from it is described go out
Smooth surface is through to the dot surface, and the angle of the basis V-type groove is obtuse angle, and the angle of the enhancing V-type groove is acute angle
Or right angle.
Optionally, the angle of the basic V-type groove is 120 ± 10 °, the angle of the enhancing V-type groove is 60 ±
10°。
Optionally, the angle of the basic V-type groove is 120 °, and the angle of the enhancing V-type groove is 90 °.
Optionally, the angle of the basic V-type groove is 135 °, and the angle of the enhancing V-type groove is 60 ° or 90 °.
Optionally, the arc groove includes equal deep arc groove and the depth arc groove such as not.
Optionally, the thickness of the side incidence type light guide plate is 1.5mm, the Curvature varying model for not waiting deep arc groove
It encloses for 0.56-1.15, change in depth ranging from 0.17-0.43mm；The thickness of the side incidence type light guide plate be 2mm, it is described not
Deng the Curvature varying ranging from 0.42-0.86, change in depth ranging from 0.22-0.58mm of deep arc groove；The side incident type
The thickness of light guide plate is 2.5mm, the Curvature varying ranging from 0.33-0.69 for not waiting deep arc groove, change in depth range
For 0.28-0.72mm；The thickness of the side incidence type light guide plate is 3mm, the Curvature varying range for not waiting deep arc groove
For 0.28-0.57, change in depth ranging from 0.33-0.87mm.
Optionally, be provided with multiple sites on the dot surface, dot density from close to one end of the incidence surface to remote
One end from the incidence surface gradually increases.
Optionally, the material of the side incidence type light guide plate is PMMA, COP, PC, MS, PS or PET.
The embodiment of the present invention additionally provides a kind of backlight module, and the backlight module includes above-mentioned side incidence type light guide plate.
According to the above aspect of the present invention, the present invention is on incidence surface by being arranged multiple basic V-type grooves or multiple arcs groove, it can
To increase the distribution angle after being optically coupled into edge-type light guide plate, light can be increased and enter the opening angle after edge-type light guide plate
Degree, can increase can utilize the ratio of light, and then can weaken lamp shadow phenomenon.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, below with presently preferred embodiments of the present invention and after coordinating attached drawing to be described in detail such as.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the present invention.
Fig. 2 is another structural schematic diagram of the present invention.
Fig. 3 is another structural schematic diagram of the present invention.
Fig. 4 is the light distribution and aerial light distribution schematic diagram after light approaching side incidence type light guide plate.
Fig. 5 be light guide plate incidence surface be plane when be coupled into light guide plate light interface state schematic diagram.
Fig. 6 be light guide plate incidence surface be curved surface when be coupled into light guide plate light interface state schematic diagram.
Fig. 7 is the luminous intensity distribution schematic diagram of LED light source.
Fig. 8 is that light enters the light distribution schematic diagram after the incidence type light guide plate of side.
Fig. 9 is the schematic diagram for the enhancing V-type groove that 60 ° are arranged in 120 ° of basic V-type groove.
Figure 10 is that the angle of basic V-type groove is 60 °, 120 ° and 60 ° of enhancing is arranged in 120 ° of basic V-type groove
Light enters the light distribution comparison schematic diagram after light guide plate after V-type groove.
Figure 11 is the schematic diagram for the enhancing V-type groove that 90 ° are arranged in 120 ° of basic V-type groove.
Figure 12 is that the angle of basic V-type groove is 90 °, 120 ° and 90 ° of enhancing is arranged in 120 ° of basic V-type groove
Light enters the light distribution comparison schematic diagram after light guide plate after V-type groove.
Figure 13 is the schematic diagram for the enhancing V-type groove that 60 ° are arranged in 135 ° of basic V-type groove.
Figure 14 is that the angle of basic V-type groove is 60 °, 135 ° and 60 ° of enhancing is arranged in 135 ° of basic V-type groove
Light enters the light distribution comparison schematic diagram after light guide plate after V-type groove.
Figure 15 is the schematic diagram for the enhancing V-type groove that 90 ° are arranged in 135 ° of basic V-type groove.
Figure 16 is that the angle of basic V-type groove is 90 °, 135 ° and 60 ° of enhancing is arranged in 135 ° of basic V-type groove
Light enters the light distribution comparison schematic diagram after light guide plate after V-type groove.
Figure 17 is the relation schematic diagram between apex angle, depth and the light guide plate of not equal deep arc groove.
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.
Referring to Fig. 1 to Fig. 3, side incidence type light guide plate provided in an embodiment of the present invention includes incidence surface 1, dot surface 2, light extraction
Face 3, anti-incidence surface 4 and two sides 5 and 6；The light that LED light source is sent out is coupled into side incidence type light guide plate from incidence surface 1, it is counter enter
Smooth surface 4 is oppositely arranged with incidence surface 1, and dot surface 2 and light-emitting surface 3 are oppositely arranged, and two sides 5 and 6 are oppositely arranged, incidence surface 1
On be provided with multiple basic V-type grooves 7 or multiple arcs groove, and basic V-type groove 1 or arc groove run through from light-emitting surface 3
To dot surface 2.
Wherein, the material of the side incidence type light guide plate can be that (cycloolefin is poly- by PMMA (polymethyl methacrylate), COP
It is fit), PC (makrolon), MS (copolymer of methyl methacrylatestyrene), PS (polystyrene) or PET it is (poly- to benzene two
Formic acid glycol ester).
Further, arc groove can be to wait deep arc groove 8, as shown in Figure 2；Arc groove may be not equal deep
Arc groove 9, as shown in Figure 3.Deng it is deep refer to that the light that is located on same vertical line is equal at a distance from arc groove, it is not equal deep
Refer to be located at same vertical line on light it is unequal at a distance from arc groove.
Specifically, the light that LED light source is sent out is coupled into side incidence type light guide plate after air transmitted from incidence surface 1, should
Optically denser medium is just entered by optically thinner medium in the process, in conjunction with the material of above-mentioned side incidence type light guide plate, the refractive index of PMMA is
The refractive index that the refractive index that the refractive index that 1.491, COP refractive index is 1.535, PC is 1.586, MS is 1.533, PS is
1.59, PET refractive index is 1.655, since the refractive index of these materials is all higher than the refractive index of air, according to geometry
Optical principle and Snell's law (Snell's Law) nASin θ A=nBSin θ B are it is found that after light approaching side incidence type light guide plate
Light distribution is bound to be less than aerial distribution angle, as shown in figure 4, the figure on the left side in Fig. 4 is that light is aerial
Light distribution, the figure on the right is that light enters the light distribution after light guide plate in Fig. 4.That is, light can produce after entering light guide plate
Raw certain distribution angle shrinkage limit.In addition, the light guide plate that light enters different materials will produce different degrees of distribution angle and limit.
The light that LED light source is sent out is coupled into side incidence type light guide plate via air again, enters light when side incidence type light guide plate
When face is plane, the interface state of the light of side incidence type light guide plate is coupled into as shown in figure 5, LED light source sends out incident light, is passed through
Incidence surface reflects refraction light, because the refractive index of side incidence type light guide plate is more than the refractive index of air, it then follows the law of refraction, therefore
Reflect light and normal angle θ L<Incident light and normal angle θ A.When the incidence surface of side incidence type light guide plate is made curved-surface structure
When, the interface state for being coupled into the light of side incidence type light guide plate is as shown in Fig. 6, the coplanar structure of geometrical principle, therefore, refraction
Light and normal angle θ L '<Incident light and normal angle θ A '.Thus, when incident light source is identical, compare plane and song
What face incidence surface reflected enters angular, it is known that angular that curved refractive went out enter enters angular more than what plane refraction went out.
In conjunction with the above, multiple basic V-type grooves 7 are arranged in the embodiment of the present invention on incidence surface 1 or multiple arcs are recessed
Slot increases light and enters the open angle after edge-type light guide plate to increase the distribution angle after being optically coupled into edge-type light guide plate.
As shown in table 1, entering incidence surface 1 for the light distribution of the LED light source according to Experiments of Optics measurement and light includes
Light distribution after the side incidence type light guide plate of multiple basis V-type grooves.As shown in Figure 7 and Figure 8, Fig. 7 is shining for LED light source
Intensity distribution schematic diagram, Fig. 8 are that light enters the light distribution schematic diagram after the incidence type light guide plate of side.It can be obtained by Fig. 8, when side incident type
When the incidence surface 1 of light guide plate is plane (curve 1 in Fig. 8), light enters what the light distribution after the incidence type light guide plate of side was covered
Between angular range is -55-65 °；After upper basic V-type groove is arranged on the incidence surface 1 of side incidence type light guide plate, light enters side and enters
Light distribution after light formula light guide plate significantly increases.(the song in Fig. 8 by taking the angle of basic V-type groove 7 is 120 ° of curve as an example
Line 4), light enters between the angular range that the light distribution after the incidence type light guide plate of side is covered is -68-75 °.Therefore, when in side
After multiple basic V-type grooves are set on the incidence surface 1 of incidence type light guide plate, it is known that light enters the light intensity point after the incidence type light guide plate of side
The angular range that cloth is covered significantly increases.
Table 1
Wherein, the principle of arc groove is identical as the principle of basic V-type groove 7, when entering light in side incidence type light guide plate
After multiple arcs groove is set on face 1, it is known that it is bright that light enters the angular range that the light distribution after the incidence type light guide plate of side is covered
It is aobvious to increase.
To sum up, the embodiment of the present invention on the incidence surface 1 of side incidence type light guide plate by being arranged multiple basic V-type grooves 7
Or multiple arcs groove, angular can be entered with opening side incidence type light guide plate, so as to increase the ratio that can utilize light, into
And lamp shadow phenomenon can be weakened.
Further, the side incident type for entering to be arranged on incidence surface 1 multiple basic V-type grooves 7 according to light shown in Fig. 8 is guide-lighting
Light distribution after plate light guide plate, it is known that compare be suitable as light conduction and dispersion basic V-type groove 7 angle be 120 ° and
135 °, light intensity when 0 ° of visual angle is maximum in this case, and close to half-power, (light enters light guide plate to light intensity peak when visual angle is 20-40 °
Light intensity afterwards is that 0.5), can have both conduction and light extraction application effect, the conducting effect of planar structure is best, but light distribution angle
Light is limited within ± 60 °.To further increase the light distribution range after light enters side incidence type light guide plate, in the another of the present invention
In one embodiment, multiple enhancing V-type grooves are provided in basic V-type groove 7, enhancing V-type groove is through to net from light-emitting surface 3
The angle in point face 2, basic V-type groove 7 is obtuse angle, and the angle for enhancing V-type groove is acute angle or right angle.
Specifically, after basic V-type groove 7 being etched on incidence surface 2, enhancing is further etched in basic V-type groove 7
V-type groove.Since when basic V-type groove 7 is acute angle, the enhancing V-type groove that can be etched in basic V-type groove 7 is very
Limited, therefore, the angle of the basic V-type groove of setting of the embodiment of the present invention 7 is obtuse angle, the angle for enhancing V-type groove be acute angle or
Right angle.Wherein, the angle of the angle of basic V-type groove 7 or enhancing V-type groove refers to basic V-type groove 7 or enhancing V-type groove
The angle formed in same level.
It is obtained by verification experimental verification, after multiple enhancing V-type grooves are set in basic V-type groove 7, is only entering light relatively
The structure of multiple basic V-type grooves 7 is set on face 2, light can be further increased and enter the light distribution after the incidence type light guide plate of side
Angular range.
In another embodiment, the angle of basic V-type groove 7 be 120 ± 10 °, enhance V-type groove angle be 60 ±
10°.As shown in figure 9, its in 120 ° of basic V-type groove be arranged 60 ° enhancing V-type groove schematic diagram, Fig. 9 only with
It is arranged in one 120 ° of basic V-type groove for multiple 60 ° of enhancing V-type groove and is illustrated.As shown in Figure 10,
It is after the angle of basic V-type groove 7 is 60 °, 120 ° and 60 ° of enhancing V-type groove is arranged in 120 ° of basic V-type groove
Light enters the light distribution comparison schematic diagram after light guide plate.As shown in Figure 10, it arranges in pairs or groups 60 ° of enhancing in 120 ° of basic V-type groove 7
V-type groove can make the distribution angle of half light intensity (it is 0.5 that light, which enters light intensity after light guide plate) maximum, and largest light intensity is at 0 °, and in 30-
60 ° of peak values are moderate to drop to semi-gloss strong position in continuous, and light distribution is relatively uniform.
By experiments have shown that, when basic V-type groove 7 angle be 120 ± 10 °, enhance V-type groove angle be 60 ±
At 10 °, the light intensity and distribution angle after light can be made to enter side incidence type light guide plate are maximum.
In another embodiment, the angle of basic V-type groove 7 is 120 °, and the angle for enhancing V-type groove is 90 °.Such as figure
Shown in 11, for the schematic diagram of the enhancing V-type groove of 90 ° of setting in 120 ° of basic V-type groove, Figure 11 is only at one
It is arranged in 120 ° of basic V-type groove 7 for multiple 90 ° of enhancing V-type groove and is illustrated.As shown in figure 12,
Angle for basic V-type groove 7 is 90 °, 120 ° and light after 90 ° of enhancing V-type groove is arranged in 120 ° of basic V-type groove
Enter the light distribution after light guide plate and compares schematic diagram.As shown in Figure 12, the enhancing V-type of 120 ° of 90 ° of basic V-type groove collocation is recessed
Slot can make the distribution angle of half light intensity maximum, and largest light intensity is in continuously to drop to half light intensity position respectively in 30 °, 30-60 ° of peak value
It sets, light distribution is relatively uniform.
In another embodiment, the angle of basic V-type groove 7 be 135 °, enhance V-type groove angle be 60 ° or
90°。
As shown in figure 13, it is the schematic diagram for the enhancing V-type groove that 60 ° are arranged in 135 ° of basic V-type groove, Figure 13
Only illustrated for multiple 60 ° of enhancing V-type groove is set in one 135 ° of basic V-type groove 7.Such as figure
Shown in 14, the angle for being basic V-type groove 7 is 60 °, 135 ° and 60 ° of enhancing V is arranged in 135 ° of basic V-type groove
Light enters the light distribution comparison schematic diagram after light guide plate after type groove.As shown in Figure 14,135 ° of basic V-type groove is arranged in pairs or groups 60 °
Enhancing V-type groove, the distribution angle of half light intensity can be made maximum, for largest light intensity at 0 °, 0-60 ° of peak value is moderate in continuously dropping to
Semi-gloss strong position, light distribution are relatively uniform.
As shown in figure 15, it is the schematic diagram for the enhancing V-type groove that 90 ° are arranged in 135 ° of basic V-type groove, Figure 15
Only illustrated for multiple 90 ° of enhancing V-type groove is set in one 135 ° of basic V-type groove 7.Such as figure
Shown in 16, the angle for being basic V-type groove 7 is 90 °, 135 ° and 60 ° of enhancing V is arranged in 135 ° of basic V-type groove
Light enters the light distribution comparison schematic diagram after light guide plate after type groove.As shown in Figure 16,135 ° of basic V-type groove is arranged in pairs or groups 90 °
Enhancing V-type groove, the distribution angle of half light intensity can be made maximum, for largest light intensity at 20 °, 20-60 ° of peak value is in continuous decline respectively
To semi-gloss strong position, light distribution is relatively uniform.
Further, when the arc groove on incidence surface 1 is not wait deep arc groove 9, when not equal deep arc groove 9
When depth d variations, curvature K also correspondingly changes.In order to obtain relatively good light distribution angular range and make
Light guide plate is relatively applicable in, and the thickness T that side incidence type light guide plate is arranged in the embodiment of the present invention is 1.5-3mm, and correspondingly arc is recessed
The Curvature varying of slot ranging from 0.28-1.15.Wherein, the thickness T of side incidence type light guide plate is between light-emitting surface 3 and dot surface 2
Distance.By experiments have shown that, when the thickness T of side incidence type light guide plate is 1.5-3mm, correspondingly equal deep arc groove 9
When curvature K variation ranges are 0.28-1.15, the open angle that light enters side incidence type light guide plate can be increased obviously, into
And shadow phenomenon can be weakened obviously.
Specifically, the length of the incidence surface of the long respective side incidence type light guide plate of the light-emitting surface of LED light source, the width of LED light source
The thickness T of respective side incidence type light guide plate and be less than or equal to side incidence type light guide plate thickness T, be with light guide plate T
Based on 1.5mm, 2mm, 2.5mm, 3mm, vertex angle theta, depth d and the light guide plate T of the not equal deep arc groove 9 of incidence surface it
Between relationship it is as shown in figure 17, curvature K is as shown in table 2.
Specifically, as shown in figure 17, because when vertex angle theta is 165 °, the depth d of arc groove is too small, causes side incident type
Light guide plate easy tos produce problems of excessive heat close to LED light source, therefore the angular range that the embodiment of the present invention chooses vertex angle theta is 120-
155°。
When side incidence type light guide plate thickness T is 1.5mm, depth d is 0.43mm when vertex angle theta is 120 °, and curvature K is
1.15, it is best angle.When vertex angle theta is 155 °, depth d is 0.17mm, and curvature K is 0.56, can obtain optimum depth.Because of light
Type cooperation is good but luminous intensity can be made to decline from light source is too far, therefore as shown in Table 2, when side incidence type light guide plate thickness T is 1.5mm
When, ranging from the 0.56~1.15 of optimal curvatures K.
When side incidence type light guide plate thickness T is 2mm, depth d is 0.58mm when vertex angle theta is 120 °, and curvature K is 0.86,
For best angle.When vertex angle theta is 155 °, depth d is 0.22mm, and curvature K is 0.42, can obtain optimum depth matching.Because of light
Type cooperation is good but luminous intensity can be made to decline from light source is too far, therefore as shown in Table 2, when side incidence type light guide plate thickness T is 2mm,
Ranging from the 0.42~0.86 of optimal curvatures K.
When side incidence type light guide plate thickness T is 2.5mm, depth d is 0.72mm when vertex angle theta is 120 °, and curvature K is
0.69, it is best angle.When vertex angle theta is 155 °, depth d is 0.28mm, and curvature 0.33 can obtain optimum depth matching.
Because light type cooperation is good but luminous intensity can be made to decline from light source is too far, therefore as shown in Table 2, when side, incidence type light guide plate thickness T is
When 2.5mm, ranging from the 0.33~0.69 of optimal curvatures K.
When side incidence type light guide plate thickness T is 3mm, depth d is 0.87mm when vertex angle theta is 120 °, and curvature K is 0.57,
For best angle.When vertex angle theta is 155 °, depth d is 0.33mm, and curvature K is 0.28, can obtain optimum depth matching.Because of light
Type cooperation is good but luminous intensity can be made to decline from light source is too far, therefore as shown in Table 2, when side incidence type light guide plate thickness T is 3mm,
The ranging from 0.28-0.57 of optimal curvatures K.
Table 2
Optionally, be provided with multiple sites on dot surface 2, dot density from close to one end of incidence surface 1 to far from entering light
The one end in face 1 gradually increases.That is, one end from close to one end of incidence surface 1 to far from incidence surface 1, dot number by
It dredges and is placed on dot surface 2 to gathering.Dot density refers to the quantity for the site being distributed on unit area.Since light enters side incident type
After light guide plate, light intensity can gradually weaken from incidence surface 1 to anti-incidence surface 4, pass through such setting, it is ensured that be dissipated from all directions
The light penetrated is relatively uniform.
The embodiment of the present invention also provides a kind of backlight module, and the backlight module includes that the side provided in the above enters light
Formula light guide plate.About remaining component part of backlight module, content in the related technology is may refer to, about side incident type leaded light
The concrete composition and structure of plate, may refer to the content provided in above-described embodiment, details are not described herein again.
Backlight module provided in an embodiment of the present invention includes above-mentioned side incidence type light guide plate by the way that it is arranged, can increase
The light intensity of backlight module, so as to weaken shadow phenomenon.
Above-mentioned all optionally technical solutions can be combined arbitrarily, and the present invention does not carry out the structure after combining one by one detailed
Explanation.
Embodiment of above is merely to illustrate the present invention, and not limitation of the present invention, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all
Equivalent technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (10)
1. a kind of side incidence type light guide plate, which is characterized in that the side incidence type light guide plate includes incidence surface, dot surface, light extraction
Face, anti-incidence surface and two sides；The light that LED light source is sent out is coupled into the side incidence type light guide plate, institute from the incidence surface
It states anti-incidence surface to be oppositely arranged with the incidence surface, the dot surface and the light-emitting surface are oppositely arranged, described two side phases
To setting, multiple basic V-type grooves or multiple arcs groove, and the basic V-type groove or institute are provided on the incidence surface
It states arc groove and is through to the dot surface from the light-emitting surface.
2. side incidence type light guide plate according to claim 1, which is characterized in that be provided in the basis V-type groove more
A enhancing V-type groove, the enhancing V-type groove are through to the dot surface, the angle of the basis V-type groove from the light-emitting surface
Degree is obtuse angle, and the angle of the enhancing V-type groove is acute angle or right angle.
3. side incidence type light guide plate according to claim 2, which is characterized in that the angle of the basis V-type groove is 120
± 10 °, the angle of the enhancing V-type groove is 60 ± 10 °.
4. side incidence type light guide plate according to claim 2, which is characterized in that it is described basis V-type groove angle be
120 °, the angle of the enhancing V-type groove is 90 °.
5. side incidence type light guide plate according to claim 2, which is characterized in that it is described basis V-type groove angle be
135 °, the angle of the enhancing V-type groove is 60 ° or 90 °.
6. side incidence type light guide plate according to claim 1, which is characterized in that the arc groove includes waiting deep arc recessed
Slot and not etc. deep arc groove.
7. side incidence type light guide plate according to claim 1, which is characterized in that the thickness of the side incidence type light guide plate is
1.5mm, the Curvature varying ranging from 0.56-1.15, change in depth ranging from 0.17-0.43mm of the not equal deep arc groove；
The thickness of the side incidence type light guide plate is 2mm, the Curvature varying ranging from 0.42-0.86 for not waiting deep arc groove, deep
Degree variation range is 0.22-0.58mm；The thickness of the side incidence type light guide plate is 2.5mm, described not wait deep arc groove
Curvature varying ranging from 0.33-0.69, change in depth ranging from 0.28-0.72mm；The thickness of the side incidence type light guide plate is
3mm, the Curvature varying ranging from 0.28-0.57, change in depth ranging from 0.33-0.87mm of the not equal deep arc groove.
8. side incidence type light guide plate according to claim 1, which is characterized in that be provided with multiple nets on the dot surface
Point, the one end of dot density from close to one end of the incidence surface to far from the incidence surface gradually increase.
9. side incidence type light guide plate according to claim 1, which is characterized in that the material of the side incidence type light guide plate is
PMMA, COP, PC, MS, PS or PET.
10. a kind of backlight module, which is characterized in that the backlight module includes in claim 1 to 9 described in any claim
Side incidence type light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810644208.5A CN108646337B (en) | 2018-06-21 | 2018-06-21 | Side light-entering type light guide plate and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810644208.5A CN108646337B (en) | 2018-06-21 | 2018-06-21 | Side light-entering type light guide plate and backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108646337A true CN108646337A (en) | 2018-10-12 |
| CN108646337B CN108646337B (en) | 2020-07-31 |
Family
ID=63753190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810644208.5A Active CN108646337B (en) | 2018-06-21 | 2018-06-21 | Side light-entering type light guide plate and backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108646337B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1797096A (en) * | 2004-12-29 | 2006-07-05 | 鸿富锦精密工业（深圳）有限公司 | Plate for guiding light |
| CN101078795A (en) * | 2006-05-24 | 2007-11-28 | 清华大学 | Light conducting board and backlight module |
| CN201035177Y (en) * | 2007-01-19 | 2008-03-12 | 台湾奈普光电科技股份有限公司 | Improved structure of light conducting plate |
| CN201615441U (en) * | 2009-12-31 | 2010-10-27 | 深圳市山本光电有限公司 | Light guide plate |
| CN101988686A (en) * | 2009-08-03 | 2011-03-23 | 友达光电股份有限公司 | Light guide plate |
| CN102393545A (en) * | 2011-12-09 | 2012-03-28 | 深圳市华星光电技术有限公司 | Light guide plate, and backlight unit and liquid crystal display apparatus possessing the same |
| US8870434B2 (en) * | 2011-09-12 | 2014-10-28 | Skc Haas Display Films Co., Ltd. | Asymmetric serrated edge light guide film having circular base segments |
| CN204666858U (en) * | 2015-05-08 | 2015-09-23 | 东莞市颖锋光电材料有限公司 | A kind of light guide plate improving bright dipping briliancy |
| CN105629370A (en) * | 2016-01-05 | 2016-06-01 | 京东方光科技有限公司 | Light guide plate, backlight module and display device |
| CN107884870A (en) * | 2017-12-27 | 2018-04-06 | 翰博高新材料(合肥)股份有限公司 | A kind of light conducting plate structure for solving the problems, such as lamp shadow and preparation method thereof |
-
2018
- 2018-06-21 CN CN201810644208.5A patent/CN108646337B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1797096A (en) * | 2004-12-29 | 2006-07-05 | 鸿富锦精密工业（深圳）有限公司 | Plate for guiding light |
| CN101078795A (en) * | 2006-05-24 | 2007-11-28 | 清华大学 | Light conducting board and backlight module |
| CN201035177Y (en) * | 2007-01-19 | 2008-03-12 | 台湾奈普光电科技股份有限公司 | Improved structure of light conducting plate |
| CN101988686A (en) * | 2009-08-03 | 2011-03-23 | 友达光电股份有限公司 | Light guide plate |
| CN201615441U (en) * | 2009-12-31 | 2010-10-27 | 深圳市山本光电有限公司 | Light guide plate |
| US8870434B2 (en) * | 2011-09-12 | 2014-10-28 | Skc Haas Display Films Co., Ltd. | Asymmetric serrated edge light guide film having circular base segments |
| CN102393545A (en) * | 2011-12-09 | 2012-03-28 | 深圳市华星光电技术有限公司 | Light guide plate, and backlight unit and liquid crystal display apparatus possessing the same |
| CN204666858U (en) * | 2015-05-08 | 2015-09-23 | 东莞市颖锋光电材料有限公司 | A kind of light guide plate improving bright dipping briliancy |
| CN105629370A (en) * | 2016-01-05 | 2016-06-01 | 京东方光科技有限公司 | Light guide plate, backlight module and display device |
| CN107884870A (en) * | 2017-12-27 | 2018-04-06 | 翰博高新材料(合肥)股份有限公司 | A kind of light conducting plate structure for solving the problems, such as lamp shadow and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108646337B (en) | 2020-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103277739B (en) | A kind of optical lens | |
| CN202469764U (en) | Sidelight type backlight | |
| CN201757335U (en) | LED backlight module, liquid crystal display and display terminal | |
| CN203784831U (en) | Novel reflective lens | |
| CN206429949U (en) | A kind of multi-sheet printed optical sheet | |
| CN106681052B (en) | A kind of backlight module and display device | |
| CN102691936A (en) | Backlight module and liquid crystal display device | |
| TW201024857A (en) | A light guide plate having lateral optical structures and a backlight module having the light guide plate | |
| CN103048727B (en) | LGP (Light Guide Plate), backlight source and LCD (Liquid Crystal Display) device | |
| CN104977648A (en) | Light guide plate, backlight module and display device | |
| CN103196097B (en) | A kind of LED quadric cylinder lens for downward back radiant | |
| KR20200138758A (en) | Wedge light guide | |
| CN108375814A (en) | Novel Microstructure light guide plate and its display module | |
| CN102707371A (en) | Light guide plate | |
| CN202521382U (en) | Light guide plate, backlight module and display device | |
| CN204313107U (en) | A kind of LED light source module, LED lamp bar and down straight aphototropism mode set | |
| CN201662627U (en) | Prism capable of diffusing light beam at single side | |
| CN108646337A (en) | Side incidence type light guide plate and backlight module | |
| CN203771292U (en) | Direct-lit reflecting light lens for ultrathin televisions | |
| CN104035154A (en) | Light guide plate construction | |
| CN202033494U (en) | Light guide plate, back light source and display device | |
| CN102563466A (en) | Backlight module and display device | |
| CN102182968A (en) | Novel LED (light-emitted diode) backlight module | |
| CN104698529A (en) | Light guide board, backlight module and liquid crystal display with light guide board | |
| CN101986019A (en) | Split type light guide plate and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |