CN204717597U - A kind of diffuser plate, direct-light-type backlight module and display unit - Google Patents
A kind of diffuser plate, direct-light-type backlight module and display unit Download PDFInfo
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- CN204717597U CN204717597U CN201520465772.2U CN201520465772U CN204717597U CN 204717597 U CN204717597 U CN 204717597U CN 201520465772 U CN201520465772 U CN 201520465772U CN 204717597 U CN204717597 U CN 204717597U
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Abstract
The utility model embodiment provides a kind of diffuser plate, direct-light-type backlight module and display unit, relates to Display Technique field, adopts this diffuser plate can improve diffusion uniformity to light source, reduces lamp shadow phenomenon; The low mixed light height of a step-down of going forward side by side, reduces direct-light-type backlight module integral thickness, meets the demand of thin type display device.This diffuser plate comprises: diffuser plate main body; Diffuser plate has the incidence surface and exiting surface that are oppositely arranged; Incidence surface has multiple incident area vertically opposite with light source, incident area has multiple first concave point and/or multiple first salient point; Exiting surface have multiple second concave point and/or multiple second salient point; The aperture area of the first concave point and the second concave point is π (D/2)
2; The base area of the first salient point and the second salient point is π (D/2)
2; π is pi, and D value is 5 ~ 300 μm.For diffuser plate and comprise the direct-light-type backlight module of this diffuser plate and the preparation of display unit.
Description
Technical field
The utility model relates to Display Technique field, particularly relates to a kind of diffuser plate, direct-light-type backlight module and display unit.
Background technology
As shown in Figure 1, direct-light-type backlight module primarily of the light source of lattice arrangement, as LED luminescence chip (Light Emitting Diode, light emitting diode) and be positioned at diffuser plate above light source and form.Wherein, the effect of diffuser plate (Diffusion Plate) is that the spot light injected is diffused as area source.Its structure can be structure as shown in Figure 1, namely on diffuser plate main body 10 top and bottom, arranges multiple raised line 13 arranged in parallel, carries out reflecting the effect of diffusion to play to the light injected.
But, because raised line is row-column arrangement, to the limited efficiency of spot light diffusion, make to adopt the backlight of above-mentioned diffuser plate still to there is the problem of backlight light distribution inequality to a certain degree, cause in backlight source module, occurring obvious lamp shadow phenomenon (namely vertical corresponding high, between light source and light source the adjacent area backlight optical strength of region backlight optical strength of light source is low), affect the picture quality of display floater; Simultaneously, because the mixing uniformity of spot light after diffuser plate is not ideal enough, therefore need the mode by increasing the spacing (i.e. mixed light height) between diffuser plate incidence surface and light source to carry out the difference of weakened points light source optical strength skewness after diffuser plate, the direct-light-type backlight module integral thickness causing prior art to provide is comparatively large, is difficult to meet the demand of existing market to thin type display device further.
Utility model content
Embodiment of the present utility model provides a kind of diffuser plate, direct-light-type backlight module and display unit, adopts this diffuser plate can improve diffusion uniformity to spot light, reduces to occur obvious lamp shadow phenomenon in backlight source module; The low mixed light height of a step-down of going forward side by side, reduces direct-light-type backlight module integral thickness, meets the demand of thin type display device.
For achieving the above object, embodiment of the present utility model adopts following technical scheme:
On the one hand, the utility model embodiment provides a kind of diffuser plate, and described diffuser plate comprises: diffuser plate main body; Described diffuser plate has the incidence surface and exiting surface that are oppositely arranged; Wherein, described incidence surface has multiple incident area vertically opposite with light source, described incident area has multiple first concave point and/or multiple first salient point; Described exiting surface have multiple second concave point and/or multiple second salient point; The aperture area of described first concave point and described second concave point is π (D/2)
2; The base area of described first salient point and described second salient point is π (D/2)
2; π is pi, and D value is 5 ~ 300 μm.
Preferably, described incident area has multiple described first concave point; Described exiting surface has multiple described second concave point.
As the optional mode of one, the shape of described first concave point is conical or hemispherical or semielliptical shape; Wherein, described D is the diameter of described first concave point opening.
Preferred further, the shape of described first concave point is conical, and described conical summit is not overlapping with the center of circle, described conical bottom surface.
Preferred further, the degree of depth of described first concave point is all identical; Or the degree of depth being positioned at the first concave point of described incident area edge is greater than the degree of depth of the first concave point being positioned at described incident area inside.
As the optional mode of another kind, the shape of described second concave point is conical or hemispherical or semielliptical shape; Wherein, described D is the diameter of described second concave point opening.
Preferred further, the shape of described second concave point is conical, and described conical summit is circular arc chamfering structure; Wherein, the angle of described circular arc chamfering is 10 ~ 60 °.
Preferred on the basis of the above, described first concave point or described first salient point are evenly distributed on described incident area; And/or described second concave point or described second salient point are evenly distributed on described exiting surface.
Preferred on the basis of the above, be dispersed with diffusion particle in described diffuser plate main body.
On the other hand, the utility model embodiment still provides a kind of direct-light-type backlight module, and described direct-light-type backlight module comprises: light source and the diffuser plate described in above-mentioned any one.
Preferably, when mixed light height is 10 ~ 20mm, D value is 5 ~ 80 μm; When mixed light height is 5 ~ 10mm, D value is 50 ~ 100 μm; When mixed light height is 0.5 ~ 5mm, D value is 100 ~ 300 μm; Wherein, described mixed light height is the spacing between the incidence surface of described diffuser plate and described light source.
Preferably, described mixed light height is 1.5mm, and described D value is 0.1mm; Or described mixed light height is 0.5mm, described D value is 0.3mm.
One side, the utility model embodiment still provides a kind of display unit again, and described display unit comprises the direct-light-type backlight module described in above-mentioned any one.
Based on this, by the above-mentioned diffuser plate that the utility model embodiment provides, owing to being provided with multiple first concave point and/or first salient point of dispersion on the incident area vertically opposite with light source, relative multiple second concave point being also provided with dispersion on exiting surface and/or the second salient point, thus on incidence surface and exiting surface, define the rough on-plane surface of continuous print, thus the raised line that provides compared to prior art (herein can with reference to figure 1), the degree that continuous print concave point and/or salient point contact with the light that light source sends is higher, therefore larger to the irradiant reflectivity of light source, thus reduce the problem of backlight light distribution inequality, avoid in backlight source module, occurring obvious lamp shadow phenomenon, ensure the picture quality of display floater.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The perspective view of a kind of diffuser plate that Fig. 1 provides for prior art;
The cross-sectional view of a kind of direct-light-type backlight module that Fig. 2 provides for prior art;
A kind of diffuser plate that Fig. 3 provides for the utility model embodiment is along the cross-sectional view perpendicular to direction, plate face;
A kind of diffuser plate that Fig. 4 provides for prior art is to the optical mode graphoid of spot light diffusion effect;
A kind of diffuser plate that Fig. 5 provides for the utility model embodiment is to the optical mode graphoid one of spot light diffusion effect;
A kind of diffuser plate that Fig. 6 provides for the utility model embodiment is to the optical mode graphoid two of spot light diffusion effect;
Fig. 7 is the enlarged diagram one of partial structurtes in Fig. 3;
Fig. 8 is the enlarged diagram two of partial structurtes in Fig. 3.
Reference numeral:
01-diffuser plate; 10-diffuser plate main body; 11-incidence surface; 11a-incident area; 110-first concave point; 12-exiting surface; 120-second concave point; 13-raised line; 02-light source.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
It is pointed out that unless otherwise defined, all terms (comprising technology and scientific terminology) used in the utility model embodiment have the identical meanings jointly understood with the utility model those of ordinary skill in the field.It should also be understood that, those terms such as defined in usual dictionary should be interpreted as having the consistent implication of implication with them in the context of correlation technique, and do not apply idealized or extremely formal meaning explain, unless defined so clearly here.
And, the term that uses in the utility model patent application specification and claims " on ", the orientation of the instruction such as D score or position relationship be for based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
The utility model embodiment provides a kind of diffuser plate 01, and as shown in Figure 3, this diffuser plate 01 comprises: diffuser plate main body 10; This diffuser plate 01 has the incidence surface 11 and exiting surface 12 that are oppositely arranged; Wherein, incidence surface 11 has multiple incident area 11a vertically opposite with light source 02, incident area 11a has multiple first concave point 110 and/or multiple first salient point; Exiting surface 12 have multiple second concave point 120 and/or multiple second salient point; The aperture area of the first concave point 110 and the second concave point 120 is π (D/2)
2; The base area of the first salient point and the second salient point is π (D/2)
2; π is pi, and D value is 5 ~ 300 μm.
It should be noted that, first, diffuser plate main body 10 can adopt the light transmissive polymeric material such as polystyrene (PS), Merlon (PC), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), PETG (PET), acryl (PMMA), acrylic acid (MMA) or synthetic material to form.
Wherein, in diffuser plate main body 10, dispersible diffusion particle (as resin or acrylic sphere) further, to improve the reflectivity to the light injecting diffuser plate main body 10 inside further.
The second, with reference to shown in figure 3, incident area 11a refers to the region in the incidence surface 11 vertically opposite with light source 02, and this region can be identical with the area of light source 02, or be greater than the area of light source 02.
Because the light source 02 be applied in backlight source module is generally LED luminescence chip, its luminescence has certain angular range (be generally 120 ° fan-shaped).Therefore, in order to the light making the first concave point 110 and/or the first salient point send with light source 02 as much as possible contacts, to improve the reflectivity to light, the utility model embodiment is preferably the area of area slightly larger than light source 02 of incident area 11a.
Three, the first above-mentioned concave point 110 and the second concave point 120, the figure of its opening can be circle, ellipse, polygon etc.; The first above-mentioned salient point and the bottom surface figure of the second salient point can be also circle, ellipse, polygon etc., are specifically not construed as limiting.
Example, the various ways such as such as injection moulding, laser dotting, serigraphy can be adopted to form above-mentioned concave point or bump structure.
Here, when opening or bottom surface figure are specially circle, above-mentioned concave point or salient point are then specifically taper shape, hemispherical, semielliptical shape etc.; Wherein, above-mentioned area expression formula: π (D/2)
2in D be the diameter of above-mentioned figure split shed or bottom surface circle.
Further, above-mentioned incident area 11a only can comprise multiple first concave point 110, or only comprises multiple first salient point, also both can include the first concave point 110 and also include the first salient point.
Here, consider that the light that should light source 02 be made as much as possible to inject in diffuser plate 01 is reflected equably, therefore, first concave point 110 or the first salient point are evenly distributed on incident area 11a, namely in above-mentioned incident area 11a, only comprise multiple first concave point 110, or only comprise multiple first salient point.
Same, above-mentioned exiting surface 12 only can comprise multiple second concave point 120, or only comprises multiple second salient point, also both can include the second concave point 120 and also include the second salient point.
Here, consider that the light that should light source 02 be made as much as possible to inject in diffuser plate 01 is reflected equably, therefore, second concave point 120 or the second salient point are evenly distributed on exiting surface 12, namely, in above-mentioned exiting surface 12, only comprise multiple second concave point 120, or only comprise multiple second salient point.
It may be noted that, the quantity of the utility model embodiment to the first concave point 110 and/or the first salient point is not construed as limiting, and should adjust the quantity of the first concave point 110 and/or the first salient point according to the size of light source 02 and the aperture area of the first concave point 110 and/or the base area of the first salient point flexibly.
Same, the utility model embodiment is not construed as limiting the second concave point 120 and/or the second salient point quantity, should adjust the second concave point 120 and/or the second salient point quantity flexibly according to the size of diffuser plate main body 10 and the aperture area of the second concave point 120 and/or the base area of the second salient point.
Based on this, by the above-mentioned diffuser plate 01 that the utility model embodiment provides, owing to being provided with multiple first concave point 110 and/or first salient points of dispersion on the incident area 11a vertically opposite with light source 02, relative multiple second concave point 120 and/or the second salient points being also provided with dispersion on exiting surface 12, thus the rough on-plane surface of continuous print is defined on incidence surface 11 with exiting surface 12, thus the raised line that provides compared to prior art (herein can with reference to figure 1), the degree that continuous print concave point and/or salient point contact with the light that light source 02 sends is higher, therefore larger to the irradiant reflectivity of light source 02, thus reduce the problem of backlight light distribution inequality, avoid in backlight source module, occurring obvious lamp shadow phenomenon, ensure the picture quality of display floater.
And, the mixing uniformity being converted into area source due to the above-mentioned diffuser plate 01 pair of spot light adopting the utility model embodiment to provide is more excellent, therefore the mixed light height that can reduce between diffuser plate 01 incidence surface 11 and light source 02, to reduce the integral thickness of direct-light-type backlight module, the demand of existing market to thin type display device can be met further.
On the basis of the above, draw through optical analog, compare and bump structure, the light reflection effect that concave point structure is injected light source 02 is more excellent.Therefore, further preferably, incident area 11a has multiple the first above-mentioned concave point 110; Exiting surface 12 has multiple the second above-mentioned concave point 120.
Compared to the cord tissue on the diffuser plate top and bottom shown in Fig. 1, continuous print first concave point 110 in the above-mentioned diffuser plate 01 that the utility model embodiment provides and the second concave point 120 have larger surface area, when the light that light source 02 sends is mapped to these concave points surperficial, reflection can be there is and spread to surrounding all angles in light, make light generation diffuse reflection, improve diffuser plate 01 entirety to the reflectivity of light, thus reduce the degree occurring obvious lamp shadow phenomenon from the light of diffuser plate injection.
Further, it also can be in the following manner that the diffuser plate provided due to prior art realizes spot light to be converted into area source, that is: on the incidence surface 11, exiting surface 12 of the upper and lower side of diffuser plate main body 10, be coated with diffusion particle (as acrylic sphere), by spherical diffusion particle, the light injected be diffused as area source.But be limited to the various factors such as the coating processes of diffusion particle, the uniformity that a kind of like this diffuser plate that prior art provides spreads light source is also poor, backlight light distribution also can be caused uneven, occur lamp shadow problem, affect the picture quality of display floater.
And the another kind of diffuser plate that the utility model embodiment provides above-mentioned diffuser plate 01 structure with continuous print first concave point 110 and the second concave point 120 provides compared with the prior art shown in Fig. 2 also has light source 02 and better spreads mixed effect.
Here, in order to diffusion mixed effect that is more clear, that embody above-mentioned diffuser plate 01 pair of light source 02 that the utility model embodiment provides intuitively, two width optical mode graphoids are provided below, optical mode graphoid as shown in Figure 4, a kind of upper and lower surface provided for prior art is coated with the diffuser plate of diffusion particle to the optical mode graphoid of spot light (for LED luminescence chip) diffusion effect; Wherein, test condition is: mixed light height 1.5mm; Light simulation drawing as shown in Figure 5, a kind of diffuser plate provided for the utility model embodiment is to the optical mode graphoid one of spot light diffusion effect; Wherein, test condition is: mixed light height 1.5mm; Be circle for the opening figure of the first concave point 110 and the second concave point 120, wherein, the value of circular diameter D is 100 μm.
In above-mentioned simulation drawing, it is the highest that violet region represents mixed light brightness, is secondly blue region, is finally green area; Violet region and green area distribution more obviously illustrate that the luminance difference that diffuser plate spreads light source is also larger.Can find out, be the same terms of 1.5mm at mixed light height under, after the diffuser plate adopting prior art to provide carries out diffusion mixing to light source, larger corresponding to capacity volume variance between the optical energy of LED luminescence chip position and LED luminescence chip, cause overall optical strength Energy distribution in backlight source module uneven, cause the picture quality of display floater bad; And the above-mentioned diffuser plate 01 pair of light source adopting the utility model embodiment to provide carry out diffusion mixing after, the light that LED luminescence chip sends is diffused plate 01 and reflects 70%, absorb 30%, namely, improve the haze value of corresponding incident area 11a vertical with LED luminescence chip, increase the light penetration between LED luminescence chip, in backlight source module, optical energy distribution is more even, and the picture quality of display is better.
Here, diffuser plate haze value is defined as the ratio of diffusional permeability and total light transmittance; Wherein, total light transmittance is parallel transmitance and diffusional permeability sum.
Further, contrast is carried out to the optical analog effect of above-mentioned Fig. 4 and Fig. 5 known, because the diffusion mixed effect of above-mentioned diffuser plate 01 pair of light source 02 is more excellent, therefore the mixed light height between diffuser plate 01 and light source 02 can suitably be reduced, further reduction direct-light-type backlight module integral thickness, meets the demand of existing market to thin type display device.
Such as, can suitably reduce mixed light height, and regulate the aperture area of the first concave point 110 and the second concave point 120, or the base area of the first salient point and the second salient point (namely regulating D value) reaches the object keeping preferably light mixing effect while reducing mixed light height.
As shown in Figure 6, when mixed light height reduction is 0.5mm, the value of D is correspondingly regulated to be 0.3mm, the light that LED luminescence chip is sent is diffused plate 01 and reflects 80%, absorb 20%, thus make while reducing mixed light height, keep the overall optical energy of direct-light-type backlight module to be evenly distributed.
That is, there is following relational expression in the change of mixed light height and the change of D value: mixed light height often reduces 1mm, and the value of D increases 2 ~ 3 times, and namely when mixed light height reduces, the value of D should correspondingly increase.
Example, when mixed light height is 10 ~ 20mm, D value is 5 ~ 80 μm; When mixed light height is 5 ~ 10mm, D value is 50 ~ 100 μm; When mixed light height is 0.5 ~ 5mm, D value is 100 ~ 300 μm.
On the basis of the above, as shown in Figure 7, when the shape of the first concave point 110 is conical, conical summit (is labeled as O in figure
1) (in figure, be labeled as O with the center of circle, conical bottom surface
2) not overlapping, namely this taper shape is unequal-sided taper shape, to improve the reflex to light further.
Further, shown in figure 3, the degree of depth of the first concave point 110 can be all identical; Or as shown in Figure 8, the degree of depth being positioned at the first concave point 110 of incident area 11a edge is greater than the degree of depth of the first concave point 110 being positioned at incident area 11a inside.
Here, all identical or different luminous intensity according to light source 02 of the degree of depth of the first concave point 110 on incident area 11a is arranged.
When the luminous intensity of light source 02 is stronger, in its light emitting region, the optical strength difference of regional is less, therefore, the degree of depth shown in the programmable reference diagram of the first concave point 110 3 on incident area 11a is all identical, to be reduced in process complexity diffuser plate 01 incidence surface 11 being formed multiple first concave point 110.
When the luminous intensity of light source 02 is more weak, because light source 02 (as LED luminescence chip) self has the characteristic that central area optical strength is large, the fringe region optical strength of surrounding is little, therefore, when its Integral luminous intensity is more weak, in its light emitting region the optical strength difference of regional then embody more obvious.In the case, the degree of depth of the first concave point 110 on incident area 11a can be structure as shown in Figure 8, that is, (figure is labeled as d to be arranged in the degree of depth of the first concave point 110 of incident area 11a edge
1) (figure is labeled as d to be greater than the concave point degree of depth of the first concave point 110 being arranged in incident area 11a inside
2).
So, because the concave point degree of depth being positioned at incident area 11a edge is large, stronger to the reflex of light, can improve the reflection compared with weak-strong test light of the luminous intensity of light source 02; And the luminous intensity of light source 02 center is stronger, thus the concave point degree of depth corresponding to this region is less, thus utilize above-mentioned concave point depth design to improve the difference of the optical strength of luminous intensity more weak light source 02 zones of different, improve the overall optical energy distribution of direct-light-type backlight module further.
It should be noted that, the first concave point 110 being positioned at incident area 11a edge may be a circle, also may be multi-turn; The quantity being positioned at the first concave point 110 of incident area 11a inside may be one, also may be multiple, should adjust flexibly, be specifically not construed as limiting according to the concrete size of incident area 11a and light source 02.
Further, when the shape of the second concave point 120 is conical, shown in figure 7, conical summit is circular arc chamfering structure (being labeled as R in figure); Wherein, the angle of circular arc chamfering is 10 ~ 60 °.
So, because conical summit has circular arc chamfering structure, compared to sharp-pointed conical summit, its surface area is larger, and what contact with light is also more, and then also better to the reflection diffusion effect of light.
Further, the utility model embodiment still provides a kind of direct-light-type backlight module, and shown in figure 3, this direct-light-type backlight module comprises: light source 02 and above-mentioned diffuser plate 01.
Certainly, this direct-light-type backlight module also can comprise the assemblies such as base plate, reflecting plate, center, specifically can continue to use prior art, not repeat them here.
On this basis, adopt the above-mentioned direct-light-type backlight module that the utility model embodiment provides, mixed light height often reduces 1mm, and the value of D increases 2 ~ 3 times, to make the reflectivity of reflecting plate 01 pair of light source 02 improve 20 ~ 40%, thus improves light mixing effect; Wherein, mixed light height is the spacing between the incidence surface 11 of diffuser plate 01 and light source 02.
Concrete, when mixed light height is 10 ~ 20mm, D value is 5 ~ 80 μm; When mixed light height is 5 ~ 10mm, D value is 50 ~ 100 μm; When mixed light height is 0.5 ~ 5mm, D value is 100 ~ 300 μm.
Example, when mixed light height is 1.5mm, aperture is 0.1mm; When mixed light height is reduced to 0.5mm, aperture is also correspondingly increased to 0.3mm.
On the basis of the above, the utility model embodiment further enhances a kind of display unit, and this display unit comprises above-mentioned direct-light-type backlight module.
Certainly, this display unit also comprises the display panels relative with this direct-light-type backlight module.Wherein, above-mentioned display unit can be specifically liquid crystal indicator, can be product or the parts that liquid crystal display, LCD TV, DPF, mobile phone, panel computer etc. have any Presentation Function.
It should be noted that, the utility model institute drawings attached is the simple schematic diagram of above-mentioned diffuser plate and the direct-light-type backlight module comprising this diffuser plate, only for the clear this programme that describes embodies the structure relevant to inventive point, the structure irrelevant with inventive point for other is existing structure, in the accompanying drawings not embodiment or only realizational portion.
The above; be only detailed description of the invention of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; change can be expected easily or replace, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of described claim.
Claims (13)
1. a diffuser plate, described diffuser plate comprises: diffuser plate main body; It is characterized in that, described diffuser plate has the incidence surface and exiting surface that are oppositely arranged;
Wherein, described incidence surface has multiple incident area vertically opposite with light source, described incident area has multiple first concave point and/or multiple first salient point;
Described exiting surface have multiple second concave point and/or multiple second salient point;
The aperture area of described first concave point and described second concave point is π (D/2)
2;
The base area of described first salient point and described second salient point is π (D/2)
2;
π is pi, and D value is 5 ~ 300 μm.
2. diffuser plate according to claim 1, is characterized in that, described incident area has multiple described first concave point; Described exiting surface has multiple described second concave point.
3. diffuser plate according to claim 2, is characterized in that, the shape of described first concave point is conical or hemispherical or semielliptical shape; Wherein, described D is the diameter of described first concave point opening.
4. diffuser plate according to claim 3, is characterized in that, the shape of described first concave point is conical, and described conical summit is not overlapping with the center of circle, described conical bottom surface.
5. diffuser plate according to claim 2, is characterized in that, the degree of depth of described first concave point is all identical; Or the degree of depth being positioned at the first concave point of described incident area edge is greater than the degree of depth of the first concave point being positioned at described incident area inside.
6. diffuser plate according to claim 2, is characterized in that, the shape of described second concave point is conical or hemispherical or semielliptical shape; Wherein, described D is the diameter of described second concave point opening.
7. diffuser plate according to claim 6, is characterized in that, the shape of described second concave point is conical, and described conical summit is circular arc chamfering structure;
Wherein, the angle of described circular arc chamfering is 10 ~ 60 °.
8. the diffuser plate according to any one of claim 1 to 7, is characterized in that, described first concave point or described first salient point are evenly distributed on described incident area; And/or described second concave point or described second salient point are evenly distributed on described exiting surface.
9. the diffuser plate according to any one of claim 1 to 7, is characterized in that, is dispersed with diffusion particle in described diffuser plate main body.
10. a direct-light-type backlight module, is characterized in that, described direct-light-type backlight module comprises: light source and the diffuser plate as described in any one of claim 1 to 9.
11. direct-light-type backlight modules according to claim 10, is characterized in that,
When mixed light height is 10 ~ 20mm, D value is 5 ~ 80 μm;
When mixed light height is 5 ~ 10mm, D value is 50 ~ 100 μm;
When mixed light height is 0.5 ~ 5mm, D value is 100 ~ 300 μm;
Wherein, described mixed light height is the spacing between the incidence surface of described diffuser plate and described light source.
12. direct-light-type backlight modules according to claim 11, is characterized in that,
Described mixed light height is 1.5mm, and described D value is 0.1mm;
Or described mixed light height is 0.5mm, described D value is 0.3mm.
13. 1 kinds of display unit, is characterized in that, described display unit comprises the direct-light-type backlight module as described in any one of claim 10 to 12.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916675A (en) * | 2018-08-28 | 2018-11-30 | 华南理工大学 | A kind of side entering type plant light source of no light guide plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916675A (en) * | 2018-08-28 | 2018-11-30 | 华南理工大学 | A kind of side entering type plant light source of no light guide plate |
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