CN105954828A - Manufacturing method of light guide plate, light guide plate and backlight source - Google Patents
Manufacturing method of light guide plate, light guide plate and backlight source Download PDFInfo
- Publication number
- CN105954828A CN105954828A CN201610547580.5A CN201610547580A CN105954828A CN 105954828 A CN105954828 A CN 105954828A CN 201610547580 A CN201610547580 A CN 201610547580A CN 105954828 A CN105954828 A CN 105954828A
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- China
- Prior art keywords
- guide plate
- light guide
- incidence surface
- backlight
- light
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Classifications
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- 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
- G02B6/0065—Manufacturing aspects; Material aspects
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a manufacturing method of a light guide plate, the light guide plate and a backlight source. The light guide plate comprises a light incident surface. The manufacturing method comprises the steps that an irregular sawtooth structure is formed on the light incident surface, wherein acquisition of the irregular sawtooth structure comprises the following steps that multiple sampling points of the irregular sawtooth structure are acquired based on calculation of target luminance uniformity of the light guide plate and luminance distribution of light rays emitted by each LED lamp of the backlight source meeting the target luminance uniformity; and a curve of all the sampling points is drawn and connected according to the linear fitting relation between all the sampling points so that the curve is the shape of the irregular sawtooth structure. According to the manufacturing method of the light guide plate, the problems of bright lines of the two sides of the backlight source and bright bands appearing in front of the LED lamps of the backlight source can be solved.
Description
Technical field
The present invention relates to Display Technique field, in particular it relates to the making side of a kind of light guide plate
Method, light guide plate and backlight.
Background technology
For middle control machine backlight and vehicle-mounted backlight, the incidence surface of its light guide plate generally uses
Broached-tooth design, as it is shown in figure 1, be the shape graph of the broached-tooth design of current light guide plate incidence surface.
As seen from the figure, current broached-tooth design is regular, and LED light source is sent by this sawtooth itself
Light can play disperse function, thus contribute to releasing the focus (Hotspot) of LED
Bad phenomenon.
But, the broached-tooth design of rule can increase the weight of the bright line on backlight both sides, and causes
Before the LED of backlight, bright band occurs.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art, it is proposed that
The manufacture method of a kind of light guide plate, light guide plate and backlight, it can solve backlight both sides
Bright line, and the problem that bright band occurs before the LED of backlight.
The manufacture method of a kind of light guide plate, described leaded light are provided for realizing the purpose of the present invention
Plate includes incidence surface, including:
Described incidence surface is formed irregular broached-tooth design；Wherein, described irregular sawtooth
The acquisition of structure comprises the following steps:
The target luminance uniformity based on described light guide plate and meet this target luminance uniformity
In backlight, the briliancy distribution of the light that each LED sends calculates, and obtains described
Multiple sample points of irregular broached-tooth design；
According to the linear fit relation between each sample point, draw and connect each sample point
Curve, described curve is the shape of described irregular broached-tooth design.
Wherein, the described target luminance uniformity based on described light guide plate and meet this target brightness
In the backlight of the degree uniformity, the briliancy distribution of the light that sends of each LED carries out calculating
Formula is:
Wherein, it is perpendicular in the plane of its incidence surface set up rectangular coordinate system at described light guide plate,
Ly is the vertical coordinate of each sample point of described irregular broached-tooth design；The horizontal stroke of described sample point
Coordinate is the position on the length direction of corresponding described incidence surface；
L is any one LED in the backlight meeting the described target luminance uniformity
In the light sent, the length of the light perpendicular with described incidence surface, this length of briliancy etc.
Vertical spacing between high line and described LED, and set L=1；
C is the polar coordinate that any one the light sent with each LED in backlight is set up
The polar angle of system, c is equal to the refraction angle of described light guide plate；
C is variable, carries out value according to the diverse location on the length direction of described incidence surface；
n1For the refractive index of air, n1=1；
n2Refractive index for described light guide plate.
Preferably, the material of described light guide plate is polymethyl methacrylate；n2=1.48.
Preferably, the target luminance uniformity of described light guide plate is arranged to: at described leaded light
On the surface that plate is perpendicular with described incidence surface, the briliancy of central area is 100%；Remaining district
The briliancy in territory is 90%；
Described irregular broached-tooth design includes:
First sawtooth portion, is arranged on the central area of described incidence surface；
Second sawtooth portion, is two, and is separately positioned on described incidence surface and is positioned at described center
The marginal area of both sides, region；
The facewidth in described second sawtooth portion is more than the facewidth in described first sawtooth portion.
As another technical scheme, the present invention also provides for a kind of light guide plate, including incidence surface,
Described incidence surface is provided with irregular broached-tooth design；Wherein, described irregular broached-tooth design
Obtain in the following ways:
The target luminance uniformity based on described light guide plate and meet this target luminance uniformity
In backlight, the briliancy distribution of the light that each LED sends calculates, and obtains described
Multiple sample points of irregular broached-tooth design；
According to the linear fit relation between each sample point, draw and connect each sample point
Curve, described curve is the shape of described irregular broached-tooth design.
Preferably, the described target luminance uniformity based on described light guide plate and meet this target
In the backlight of the briliancy uniformity, the briliancy distribution of the light that each LED sends calculates
Formula be:
Wherein, it is perpendicular in the plane of its incidence surface set up rectangular coordinate system at described light guide plate,
Ly is the vertical coordinate of each sample point of described irregular broached-tooth design；The horizontal stroke of described sample point
Coordinate is on the length direction of the corresponding described incidence surface of light that each described LED sends
Position；
L is any one LED in the backlight meeting the described target luminance uniformity
In the light sent, the brightness of the light perpendicular with described incidence surface, and with this brightness as list
Position brightness, i.e. L=1；
C is the polar coordinate that any one the light sent with each LED in backlight is set up
The polar angle of system, c is equal to the refraction angle of described light guide plate；
C is variable, carries out value according to the diverse location on the length direction of described incidence surface；
n1For the refractive index of air, n1=1；
n2Refractive index for described light guide plate.
Preferably, the material of described light guide plate is polymethyl methacrylate；n2=1.48.
Preferably, the target luminance uniformity of described light guide plate is arranged to: at described leaded light
On the surface that plate is perpendicular with described incidence surface, the briliancy of central area is 100%；Remaining district
The briliancy in territory is 90%；
Described irregular broached-tooth design includes:
First sawtooth portion, is arranged on the central area of described incidence surface；
Second sawtooth portion, is two, and is separately positioned on described incidence surface and is positioned at described center
The marginal area of both sides, region；
The facewidth in described second sawtooth portion is more than the facewidth in described first sawtooth portion.
As another technical scheme, the present invention also provides for a kind of backlight, and it includes this
The above-mentioned light guide plate of bright offer.
Preferably, described backlight is vehicle-mounted backlight or middle control machine backlight.
The method have the advantages that
The manufacture method of the light guide plate that the present invention provides, it is by the incidence surface of light guide plate
Forming irregular broached-tooth design, this irregular broached-tooth design is that target luminance based on light guide plate is equal
Evenness and each LED sends in meeting the backlight of this target luminance uniformity light
Briliancy distribution obtains, such that it is able to avoid the occurrence of the bright line on backlight both sides, and in backlight
The problem that bright band occurs before the LED in source.
The light guide plate that the present invention provides, it is not advised by being provided with on the incidence surface of light guide plate
Then broached-tooth design, this irregular broached-tooth design is that the target luminance uniformity based on light guide plate is with full
The briliancy distribution of the light that in the backlight of this target luminance uniformity of foot, each LED sends
Obtain, such that it is able to avoid the occurrence of the bright line on backlight both sides, and the LED at backlight
The problem that bright band occurs before lamp.
The backlight that the present invention provides, its above-mentioned light guide plate provided by using the present invention,
The bright line on backlight both sides can be avoided the occurrence of, and occur bright before the LED of backlight
The problem of band.
Accompanying drawing explanation
Fig. 1 is the shape graph of the broached-tooth design of current light guide plate incidence surface；
The FB(flow block) of the manufacture method of the light guide plate that Fig. 2 provides for the present invention；
Fig. 3 is the scattergram of the target luminance uniformity that the embodiment of the present invention uses；
Fig. 4 is that the pole that any one the light sent with each LED in backlight is set up is sat
Mark system figure；
Fig. 5 is the schematic diagram drawing the curve connecting each sample point；
The shape graph of the irregular broached-tooth design that Fig. 6 embodiment of the present invention obtains.
Detailed description of the invention
For making those skilled in the art be more fully understood that technical scheme, knot below
Close accompanying drawing manufacture method, light guide plate and the backlight of the light guide plate that the present invention provides are carried out in detail
Thin description.
The manufacture method of the light guide plate that the present invention provides, this light guide plate includes incidence surface, its bag
Include:
Incidence surface is formed irregular broached-tooth design.The light guide plate that Fig. 2 provides for the present invention
The FB(flow block) of manufacture method.Refer to Fig. 2, the acquisition of irregular broached-tooth design include with
Lower step:
S1, the target luminance uniformity based on light guide plate and meet this target luminance uniformity
In backlight, the briliancy distribution of the light that each LED sends calculates, and obtains and do not advise
Then multiple sample points of broached-tooth design.
S2, according to the linear fit relation between each sample point, draws and connects each sampling
The curve of point, this curve is the shape of irregular broached-tooth design.
In step sl, the target luminance uniformity of light guide plate refers to, there is not backlight
The bright line on both sides, and in the case of bright band occurring before the LED of backlight, light guide plate
Briliancy distribution.And the briliancy distribution of the light that each LED sends is basis in backlight
This target luminance uniformity designs.
In step s 2, so-called linear fit relation, refer to portray approx with full curve
Or than the functional relationship between the coordinate represented by discrete point group on quasi-plane.
As long as from the foregoing, it will be observed that meet the target luminance uniformity of light guide plate, the most there is not backlight
The bright line on both sides, source, and the situation of bright band occurs before the LED of backlight, and above-mentioned
The shape of irregular broached-tooth design is the premise bar in the target luminance uniformity meeting light guide plate
Acquisition is calculated, so that entering light with the light guide plate of the shape of this irregular broached-tooth design under part
Face, i.e. can reach the bright line avoiding the occurrence of backlight both sides, and the LED at backlight
The front purpose that bright band occurs.
Below the calculating process of multiple sample points of broached-tooth design irregular in step S1 is carried out
Describe in detail.Specifically, as a example by the scattergram of the target luminance uniformity shown in Fig. 3,
The target luminance uniformity of light guide plate 1 is arranged to: at light guide plate 1 and its incidence surface 101
On perpendicular surface, the briliancy of central area A is 100%；And it is centered around this central area
The briliancy of remaining region B around is 90%.Meet the backlight of the above-mentioned target luminance uniformity
The briliancy equal pitch contour of a plurality of light that any one LED 2 in source sends is curve 201.
Take any one LED 2 in the backlight meeting the above-mentioned target luminance uniformity
Any one light 203 in the light gone out, sets up polar coordinate system.Fig. 4 is with in backlight
The polar coordinate system figure that any one the light that each LED sends is set up.Refer to Fig. 4,
On the incidence surface 101 of light guide plate 1, i.e. the interface shown in Fig. 4, light 203 occurs
Refraction.Wherein, n1For the refractive index of air, n1=1；n2Refractive index for light guide plate 1.Should
The material of light guide plate 1 is usually polymethyl methacrylate, refractive index n of this material2=1.48.
Therefore, the relation of the light generation refraction that each LED 2 sends is:
Thus derive:
Wherein, a is the angle of incidence of light；B is the refraction angle of light.
Because b=c, thus derive:
Wherein, c is the polar angle of above-mentioned polar coordinate system.
Meanwhile, any one LED 2 in the backlight meeting the target luminance uniformity
In the light sent, length L of the light 202 perpendicular with incidence surface 101 is briliancy etc.
Vertical spacing between high line 201 and LED 2, and set this vertical spacing L equal to 1.
And, the angle e between this light 202 and incident ray meets below equation:
E=90 ° of-C
Wherein, C is variable, and it enters according to the diverse location on the length direction of incidence surface 101
Row value.
Fig. 5 is the schematic diagram drawing the curve connecting each sample point.Refer to Fig. 5, leading
Tabula rasa 1 is perpendicular in the plane of its incidence surface 101 set up rectangular coordinate system, at this rectangular coordinate
Fasten the multiple sample points 3 drawing broached-tooth design.Wherein, the abscissa of this sample point 3 is each
Diverse location on the length direction of the light correspondence incidence surface 101 that individual LED 2 sends.
The vertical coordinate Ly of sample point 3 on the basis of above-mentioned formula and derivation, Ke Yigen
Computing formula is descended to obtain according to this:
Then, sample point 3 is drawn in the rectangular coordinate system that figure 5 illustrates, and carries out
Step S2, according to the linear fit relation between each sample point 3, each takes to draw connection
The curve 4 of sampling point, this curve 4 is the shape of irregular broached-tooth design.
The shape of the irregular broached-tooth design finally obtained by above-mentioned calculating is as shown in Figure 6.
As seen from the figure, if the target luminance uniformity of light guide plate 1 is arranged to: light guide plate 1 and its
On the surface that incidence surface 101 is perpendicular, the briliancy of central area A is 100%；And be centered around
The briliancy of remaining region B around this central area is 90%.Meeting, this target luminance is equal
On the premise of evenness, irregular broached-tooth design includes the first sawtooth portion 401 and the second sawtooth portion
402, wherein, the first sawtooth portion 401 is arranged on the central area of incidence surface；Second sawtooth portion
402 is two, and is separately positioned on incidence surface and is positioned at the marginal area of both sides, central area.And
And, the facewidth in the second sawtooth portion 402 is more than the facewidth in the first sawtooth portion 401.This irregularly
The design of sawtooth can avoid the occurrence of the bright line on backlight both sides, and the LED at backlight
The problem that bright band occurs before lamp.
As another technical scheme, the present invention also provides for a kind of light guide plate, including incidence surface,
Being provided with irregular broached-tooth design on this incidence surface, this irregular broached-tooth design uses with lower section
Formula obtains:
The target luminance uniformity based on light guide plate and the backlight meeting this target luminance uniformity
In source, the briliancy distribution of the light that each LED sends calculates, and obtains irregular saw
Multiple sample points of toothing；
According to the linear fit relation between each sample point, draw and connect each sample point
Curve, described curve is the shape of described irregular broached-tooth design.
Owing to the acquisition pattern of above-mentioned irregular broached-tooth design there has been in technique scheme
Describe in detail, do not repeat them here.
The light guide plate that the embodiment of the present invention provides, it is by arranging on the incidence surface of light guide plate
Having irregular broached-tooth design, this irregular broached-tooth design is that target luminance based on light guide plate is uniform
Degree and the brightness of the light that each LED sends in meeting the backlight of this target luminance uniformity
Degree distribution obtains, such that it is able to avoid the occurrence of the bright line on backlight both sides, and at backlight
LED before the problem of bright band occurs.
As another technical scheme, the embodiment of the present invention also provides for a kind of backlight, its bag
Include the above-mentioned light guide plate that the embodiment of the present invention provides.
The backlight that the embodiment of the present invention provides, it provides by using the embodiment of the present invention
Above-mentioned light guide plate, can avoid the occurrence of the bright line on backlight both sides, and the LED at backlight
The problem that bright band occurs before lamp.
Preferably, above-mentioned backlight be applicable to vehicle-mounted backlight or control machine backlight.
It is understood that the principle that is intended to be merely illustrative of the present of embodiment of above and
The illustrative embodiments used, but the invention is not limited in this.For in this area
For those of ordinary skill, without departing from the spirit and substance in the present invention, can do
Going out various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (10)
1. a manufacture method for light guide plate, described light guide plate includes incidence surface, and its feature exists
In, including:
Described incidence surface is formed irregular broached-tooth design；Wherein, described irregular sawtooth
The acquisition of structure comprises the following steps:
The target luminance uniformity based on described light guide plate and meet this target luminance uniformity
In backlight, the briliancy distribution of the light that each LED sends calculates, and obtains described
Multiple sample points of irregular broached-tooth design；
According to the linear fit relation between each sample point, draw and connect each sample point
Curve, described curve is the shape of described irregular broached-tooth design.
The manufacture method of light guide plate the most according to claim 1, it is characterised in that institute
State the target luminance uniformity based on described light guide plate and meet the back of the body of this target luminance uniformity
The formula that in light source, the briliancy distribution of the light that each LED sends carries out calculating is:
Wherein, it is perpendicular in the plane of its incidence surface set up rectangular coordinate system at described light guide plate,
Ly is the vertical coordinate of each sample point of described irregular broached-tooth design；The horizontal stroke of described sample point
Coordinate is the position on the length direction of corresponding described incidence surface；
L is any one LED in the backlight meeting the described target luminance uniformity
In the light sent, the length of the light perpendicular with described incidence surface, this length of briliancy etc.
Vertical spacing between high line and described LED, and set L=1；
C is the polar coordinate that any one the light sent with each LED in backlight is set up
The polar angle of system, c is equal to the refraction angle of described light guide plate；
C is variable, carries out value according to the diverse location on the length direction of described incidence surface；
n1For the refractive index of air, n1=1；
n2Refractive index for described light guide plate.
The manufacture method of light guide plate the most according to claim 2, it is characterised in that institute
The material stating light guide plate is polymethyl methacrylate；n2=1.48.
4., according to the manufacture method of the light guide plate described in claim 1-3 any one, it is special
Levying and be, the target luminance uniformity of described light guide plate is arranged to: in described light guide plate and institute
Stating on the surface that incidence surface is perpendicular, the briliancy of central area is 100%；The brightness in remaining region
Degree is 90%；
Described irregular broached-tooth design includes:
First sawtooth portion, is arranged on the central area of described incidence surface；
Second sawtooth portion, is two, and is separately positioned on described incidence surface and is positioned at described center
The marginal area of both sides, region；
The facewidth in described second sawtooth portion is more than the facewidth in described first sawtooth portion.
5. a light guide plate, including incidence surface, it is characterised in that set on described incidence surface
It is equipped with irregular broached-tooth design；Wherein, described irregular broached-tooth design obtains in the following ways:
The target luminance uniformity based on described light guide plate and meet this target luminance uniformity
In backlight, the briliancy distribution of the light that each LED sends calculates, and obtains described
Multiple sample points of irregular broached-tooth design；
According to the linear fit relation between each sample point, draw and connect each sample point
Curve, described curve is the shape of described irregular broached-tooth design.
Light guide plate the most according to claim 5, it is characterised in that described based on described
The target luminance uniformity of light guide plate and in meeting the backlight of this target luminance uniformity each
The formula that the briliancy distribution of the light that LED sends carries out calculating is:
Wherein, it is perpendicular in the plane of its incidence surface set up rectangular coordinate system at described light guide plate,
Ly is the vertical coordinate of each sample point of described irregular broached-tooth design；The horizontal stroke of described sample point
Coordinate is on the length direction of the corresponding described incidence surface of light that each described LED sends
Position；
L is any one LED in the backlight meeting the described target luminance uniformity
In the light sent, the brightness of the light perpendicular with described incidence surface, and with this brightness as list
Position brightness, i.e. L=1；
C is the polar coordinate that any one the light sent with each LED in backlight is set up
The polar angle of system, c is equal to the refraction angle of described light guide plate；
C is variable, carries out value according to the diverse location on the length direction of described incidence surface；
n1For the refractive index of air, n1=1；
n2Refractive index for described light guide plate.
Light guide plate the most according to claim 6, it is characterised in that described light guide plate
Material is polymethyl methacrylate；n2=1.48.
8. according to the light guide plate described in claim 5-7 any one, it is characterised in that institute
The target luminance uniformity stating light guide plate is arranged to: in described light guide plate and described incidence surface phase
On vertical surface, the briliancy of central area is 100%；The briliancy in remaining region is 90%；
Described irregular broached-tooth design includes:
First sawtooth portion, is arranged on the central area of described incidence surface；
Second sawtooth portion, is two, and is separately positioned on described incidence surface and is positioned at described center
The marginal area of both sides, region；
The facewidth in described second sawtooth portion is more than the facewidth in described first sawtooth portion.
9. a backlight, it is characterised in that include the light guide plate described in claim 5-8.
Backlight the most according to claim 9, it is characterised in that described backlight is
Vehicle-mounted backlight or middle control machine backlight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610547580.5A CN105954828A (en) | 2016-07-12 | 2016-07-12 | Manufacturing method of light guide plate, light guide plate and backlight source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610547580.5A CN105954828A (en) | 2016-07-12 | 2016-07-12 | Manufacturing method of light guide plate, light guide plate and backlight source |
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| Publication Number | Publication Date |
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| CN105954828A true CN105954828A (en) | 2016-09-21 |
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| CN201610547580.5A Pending CN105954828A (en) | 2016-07-12 | 2016-07-12 | Manufacturing method of light guide plate, light guide plate and backlight source |
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| CN201696995U (en) * | 2010-06-10 | 2011-01-05 | 索通发展有限公司 | Backlight device of liquid crystal display |
| CN102052634A (en) * | 2009-11-06 | 2011-05-11 | 上海向隆电子科技有限公司 | Structure for predominating light-emitting brightness or uniformization of light guide plate |
| CN102128416A (en) * | 2010-01-20 | 2011-07-20 | 3M创新有限公司 | Light guide plate assembly and manufacturing method thereof and liquid crystal display containing assembly |
| CN103926645A (en) * | 2013-04-22 | 2014-07-16 | 上海天马微电子有限公司 | Light guiding plate, backlight module and display device |
-
2016
- 2016-07-12 CN CN201610547580.5A patent/CN105954828A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052634A (en) * | 2009-11-06 | 2011-05-11 | 上海向隆电子科技有限公司 | Structure for predominating light-emitting brightness or uniformization of light guide plate |
| CN102128416A (en) * | 2010-01-20 | 2011-07-20 | 3M创新有限公司 | Light guide plate assembly and manufacturing method thereof and liquid crystal display containing assembly |
| CN201696995U (en) * | 2010-06-10 | 2011-01-05 | 索通发展有限公司 | Backlight device of liquid crystal display |
| CN103926645A (en) * | 2013-04-22 | 2014-07-16 | 上海天马微电子有限公司 | Light guiding plate, backlight module and display device |
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