CN102444835A - Straight-down type backlight module and liquid crystal display module - Google Patents
Straight-down type backlight module and liquid crystal display module Download PDFInfo
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- CN102444835A CN102444835A CN2010105102056A CN201010510205A CN102444835A CN 102444835 A CN102444835 A CN 102444835A CN 2010105102056 A CN2010105102056 A CN 2010105102056A CN 201010510205 A CN201010510205 A CN 201010510205A CN 102444835 A CN102444835 A CN 102444835A
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Abstract
The invention relates to a straight-down type backlight module and a liquid crystal display module. The straight-down type backlight module comprises at least two light emitting elements, at least one diffusion membrane, a reflecting sheet and a diffusion plate. The light emitting elements are arranged on a substrate and these light emitting elements are suitable for respectively providing light beams; the distance between any two adjacent light emitting elements is P; the diffusion membrane is disposed over the light emitting elements and kept away from the light emitting elements at an interval; the light beams from the light emitting elements are suitable for being transferred to the diffusion membrane; the reflecting sheet is disposed on the substrate and positioned at the periphery of the light emitting elements; a distance is retained between the reflecting sheet and the diffusion membrane, wherein the distance is greater than the interval and the distance is H; the diffusion plate is arranged over the diffusion membrane; and the straight-down type backlight module meets the requirement that H/P is greater than or equal to 5% but less than or equal to 60%. Furthermore, the invention provides the liquid crystal display module employing the straight-down type backlight module.
Description
Technical field
The present invention relates to a kind of backlight module, and relate in particular to a kind of direct type backlight module of slimming.
Background technology
In the use of LCD now, increasing application is to be suspended from wall on or outdoor billboard with the wall hanging mode LCD, so lightweight has its certain market trend, and wherein, backlight module is again the key component of LCD.The main member of the backlight module of straight-down negative has optics matrix, diffuser plate, lamp source group and reflector plate etc.; Form in the framework at this; How under the condition that does not increase cost and outgoing light homogeneity, reducing the demand that the spacing between lamp source group and the diffuser plate makes backlight module reach slimming effectively is an important problem in fact.
United States Patent (USP) discloses No. 20080231780 and has disclosed a kind of display assembly that adopts direct type backlight module.Diffusion sheet (diffuser film) is arranged between supporting substrate and the light source, and supporting substrate (supporting substrate) has low light absorptivity and low light scattered power, and wherein supporting substrate is made by light transmissive material.In addition, United States Patent (USP) discloses the different interval relation between diffusion sheet and the supporting substrate that disclosed among Figure 41 A～Figure 41 C of No. 20080231780.In addition, United States Patent (USP) discloses and also discloses its design in No. 20080231780 and have enough light scattering effects covering light source, and can provide than uniform surface light source, and thin optical scattering framework can be provided.
In addition, the U.S. announces No. 7068332 and discloses a direct-type backlight unit, and wherein diffusion barrier (diffusion film) is arranged between diffusion sheet (diffusing sheet) and the lamp.
The novel patent of TaiWan, China M271174 number discloses bottom-lighting type back light module, comprises light source, diffuser plate and is arranged at the slide of diffuser plate below.Slide can be handled through net-point printing, sandblast, etching or atomizing, and the light of light source can evenly be shed through slide earlier.Then, shed by diffuser plate again, the light of light source is evenly shed by liquid crystal panel.In addition, this patent also discloses another embodiment, and it is installed with diffusion sheet for the slide either side or two sides are installed with diffusion sheet, its fixed form can for attaching, sputter, or in diffusion sheet be provided with can with slide chimeric chimeric mechanism each other.
Summary of the invention
The present invention provides a kind of direct type backlight module, and the integral thickness of this direct type backlight module is thinner.
The present invention provides a kind of LCD MODULE, adopts aforesaid direct type backlight module and has the thin advantage of integral thickness of aforementioned direct type backlight module.
Other purpose of the present invention and advantage can further be understood from the technical characterictic that the present invention disclosed.
For reaching above-mentioned one or partly or entirely purpose or other purpose, one embodiment of the invention propose a kind of direct type backlight module, comprising: two light emitting, at least one diffusion barrier sheet, reflector plate and diffuser plate at least.Light-emitting component is disposed in the substrate and these light-emitting components are suitable for providing respectively light beam.The spacing of wantonly two adjacent these light-emitting components is P.Diffusion barrier sheet is disposed at the top of these light-emitting components and keeps a gap with these light-emitting components.Light beam from these light-emitting components is suitable for being passed to diffusion barrier sheet.Reflector plate is disposed in the substrate and is positioned at the periphery of these light-emitting components.Reflector plate and diffusion barrier sheet keep a distance, and wherein distance is H greater than gap and distance.Diffuser plate is disposed at the diffusion barrier sheet top, and backlight module satisfies 5%≤H/P≤60%.
In one embodiment of this invention, the thickness of diffusion barrier sheet is less than 0.8mm.In one embodiment of this invention, the mist degree of diffusion barrier sheet is at least more than or equal to 75%.In one embodiment of this invention, be doped with a plurality of diffusion particles in the diffusion barrier sheet.
In one embodiment of this invention, one of diffusion barrier sheet dispose a plurality of evenly distributed or bulge-structures that random number is arranged on the surface of diffuser plate.In one embodiment of this invention, the one-body molded or moulding separately of bulge-structure and diffusion barrier sheet.
In one embodiment of this invention, the thickness of diffuser plate is more than or equal to 0.8mm.In one embodiment of this invention, dispose a plurality of regularly arranged diffusion micro-structurals on the surface of at least one diffusion barrier sheet dorsad of diffuser plate.In one embodiment of this invention, each diffusion micro-structural is the one of which at least of list structure and dots structure.In one embodiment of this invention, list structure comprises the one of which at least of linearity structure, linearity cross structure, curve-like structure and arc structure.In one embodiment of this invention, list structure comprises the one of which at least of triangular prism, semicolumn and semiellipse post.In one embodiment of this invention, dots structure comprises the one of which at least of hemisphere, semiellipse spheroid, quadrangular pyramid and pyrometric cone.
In one embodiment of this invention, direct type backlight module satisfies 5mm≤H≤20mm.
In one embodiment of this invention, direct type backlight module satisfies 35mm≤P≤100mm.
In one embodiment of this invention, direct type backlight module also comprises optical diaphragm group, is disposed at the top of diffuser plate.In one embodiment of this invention, optical diaphragm group comprises prismatic lens (prismsheet) and brightening piece (brightness enhancement film, one of which at least BEF).
In one embodiment of this invention, direct type backlight module also comprises at least two diffused components, and each diffused component is disposed on each light-emitting component, will be passed to the beam spread of diffusion barrier sheet.
In one embodiment of this invention, these light-emitting components are respectively light-emitting diode.
Another embodiment of the present invention proposes a kind of LCD MODULE, comprises aforesaid direct type backlight module and display panels.Display panels is disposed at the top of direct type backlight module, and direct type backlight module is suitable for providing the backlight of display panels.
In sum; The direct type backlight module of embodiments of the invention and LCD MODULE have following one of them advantage at least: at first; Through above light-emitting component, being sequentially provided with diffusion barrier sheet and diffuser plate, make direct type backlight module that more uniform optical field distribution can be provided.In addition, through the distance between suitable reduction reflector plate and the diffusion barrier sheet, still suitable outgoing light homogeneity can be provided when making the integral thickness attenuation of direct type backlight module.In addition, also can suitably improve the spacing between the light-emitting component, use the usage quantity that reduces light-emitting component, thereby still suitable outgoing light homogeneity can be provided when can reduce the cost of manufacture of direct type backlight module.Embodiments of the invention are for reaching above-mentioned advantage, and direct type backlight module of the present invention satisfies the relational expression of 5%≤H/P≤60%.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and combines accompanying drawing to elaborate as follows.
Description of drawings
Fig. 1 is the partial schematic diagram of the direct type backlight module of one embodiment of the invention;
Fig. 1 ' is the sketch map of the do not share the same light angle of flare degree of light beam outgoing behind diffusion barrier sheet of the direct type backlight module of one embodiment of the invention;
Fig. 2 is the partial schematic diagram of the direct type backlight module of another embodiment of the present invention;
Fig. 3 A and Fig. 3 B illustrate the cutaway view and the stereogram of diffuser plate of the example of Fig. 2 respectively;
Fig. 4 A and Fig. 4 B illustrate the stereogram and the cutaway view of diffuser plate of the example of Fig. 2 respectively;
Fig. 5 A and Fig. 5 B illustrate the cutaway view and the stereogram of diffuser plate of the example of Fig. 2 respectively;
Fig. 6 is the partial schematic diagram of the direct type backlight module of further embodiment of this invention;
Fig. 7 is the partial schematic diagram of the direct type backlight module of yet another embodiment of the invention;
Fig. 8 is the sketch map of the LCD MODULE of one embodiment of the invention.
The specific embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in DETAILED DESCRIPTION OF THE PREFERRED, can clearly appear below in conjunction with accompanying drawing.The direction term of being mentioned in following examples, for example: upper and lower, left and right, front or rear etc. only are the directions with reference to accompanying drawing.Therefore, the direction term of use is to be used for explaining not to be to be used for limiting the present invention.
Fig. 1 is the partial schematic diagram of the direct type backlight module of one embodiment of the invention.With reference to figure 1, the direct type backlight module 100 of present embodiment comprises: the light-emitting component 110 more than at least two, at least one diffusion barrier sheet 120, reflector plate 130 and diffuser plate 140.Light-emitting component 110 is disposed in the substrate 150 and is suitable for providing respectively light beam L1.In addition, the spacing between adjacent these light-emitting components 110 is defined as P.In the present embodiment, light-emitting component 110 with light-emitting diode as implementing example.
In addition, diffusion barrier sheet 120 is disposed at the top of above-mentioned light-emitting component 110 and keeps a gap S1 with these light-emitting components 110, and comes the light beam L1 of self-emission device 110 to be suitable for directly being passed to diffusion barrier sheet 120, and is as shown in Figure 1.In other words, do not have other blooming piece between light-emitting component 110 and the diffusion barrier sheet 120, for example: thickness is thicker and be suitable for the diffuser plate as the usefulness of support.In the present embodiment, the thickness of diffusion barrier sheet 120 is less than 0.8mm basically, uses thicker and be suitable for diffuser plate as the usefulness of support as differentiation with conventional thickness.In addition; Because the thinner thickness of the diffusion barrier sheet 120 of present embodiment; Therefore diffusion barrier sheet 120 itself be except can presenting the deflection shape and being suitable for being applied on the backlight module of different shape or form, and also institute is helpful for the slimming of direct type backlight module 100 integral thickness.
In the present embodiment; The mist degree of above-mentioned diffusion barrier sheet 120 is at least more than or equal to 75%; The light beam L1 that so can make self-emission device 110 is after passing through diffusion barrier sheet 120; Can produce preferable light diffusion effect, meaning is that the distribution of light intensity distribution meeting of light beam L1 outgoing after diffusion barrier sheet 120 is comparatively even.In addition, present embodiment adopts Fig. 1 ' and following formula to calculate to the definition of the mist degree of above-mentioned diffusion barrier sheet 120:
Wherein, Fig. 1 ' illustrates the sketch map of the do not share the same light angle of flare degree of light beam L1 outgoing behind diffusion barrier sheet 120; In Fig. 1 '; It is 5 briliancy that measured when spending that L5 is defined as normal N 1 angle with light-emitting face E1, and it is 20 briliancy that measured when spending that L20 is defined as normal N 1 angle with light-emitting face E1, and it is 70 briliancy that measured when spending that L70 is defined as normal N 1 angle with light-emitting face E1.
Because the mist degree of the diffusion barrier sheet 120 of present embodiment is at least more than or equal to 75%; Therefore light beam L1 is after passing through diffusion barrier sheet 120; Can demonstrate preferable light diffusion effect, thus, on the effect of covering luminance defects (mura), just can have preferable performance.In the embodiment that Fig. 1 illustrated; Diffusion barrier sheet 120 for example is the printing opacity diaphragm; And be doped with a plurality of diffusion particles (not illustrating) in this printing opacity diaphragm; So that light beam L1 is through in the process of diffusion barrier sheet 120, can be effectively by the scattering of diffusion particle institute, and behind diffusion barrier sheet, can demonstrate light field diffusion effect uniformly in outgoing.Yet the example of the diffusion barrier sheet 120 of present embodiment is not limited to Fig. 1 and illustrates, and diffusion barrier sheet 120 also can adopt other possible enforcement aspect, and associated description will be explained in subsequent paragraph.
In addition, diffuser plate 140 is disposed at diffusion barrier sheet 120 tops, and is as shown in Figure 1.In the present embodiment, the thickness of diffuser plate 140 is essentially more than or equal to 0.8mm, uses with aforesaid diffusion barrier sheet 120 conducts and distinguishes.In other words, the diffuser plate 140 of present embodiment is except can be with the light beam L1 through diffusion barrier sheet 120 further the homogenisingization, and diffuser plate 140 also can be used as and supports the usefulness of subsequent optical diaphragm configuration on it.Similarly; In the embodiment that Fig. 1 illustrated, diffuser plate 140 for example is that printing opacity is dull and stereotyped, and also can be doped with a plurality of diffusion particles (not illustrating) in this printing opacity flat board; Thus; When light beam L1 through in the process of diffuser plate 140, just can be effectively by the scattering of diffusion particle institute, use making light beam L1 in outgoing its distribution of light intensity homogenising more behind diffuser plate.Yet the example of the diffuser plate 140 of present embodiment is not limited to Fig. 1 and illustrates, and diffuser plate 140 also can adopt other possible enforcement aspect, and associated description will be explained in subsequent paragraph.
Continuation is with reference to figure 1; Because the light beam L1 that is passed to diffusion barrier sheet 120 is partly in the reflected back substrate 150; Therefore present embodiment is through being disposed at reflector plate 130 in the substrate 150 and being positioned at the periphery of light-emitting component 110; Make light beam L1 be able to be reflected and be passed to diffusion barrier sheet 120 again, thus can promote the utilization rate of light beam L1 effectively and promote simultaneously direct type backlight module whole go out luminous intensity.In the present embodiment, maintain a distance between reflector plate 130 and the diffusion barrier sheet 120, wherein this distance definition is H, and distance H is greater than gap S1.
In detail; Because light-emitting component 110 tops of present embodiment are sequentially provided with above-mentioned diffusion barrier sheet 120 and above-mentioned diffuser plate 140; Therefore; When the light beam L1 that light-emitting component 110 is provided formerly passes through diffusion barrier sheet 120, just can be spread the light intensity distributions of light beam L1, thereby make outgoing distribute comparatively even in the distribution of light intensity of the light beam L1 of diffusion barrier sheet 120 by diffusion barrier sheet 120.Then, can be when being passed to diffuser plate 140 from the light beam L1 of diffusion barrier sheet by inner diffusion particle of diffuser plate 140 or the described micro-structural in the subsequent paragraph, thus can make outgoing in the light intensity distributions of the light beam of diffuser plate 140 homogenising more.In other words, adopt the structure that present embodiment disclosed, can make direct type backlight module 100 that more uniform optical field distribution is provided.
In addition; Because the outgoing light homogeneity of direct type backlight module 100 is relevant with distance H and spacing P, so the relation of designed distance H and spacing P how effectively, make direct type backlight module 100 under the prerequisite of slimming; Still preferable outgoing light homogeneity can be provided, it specifies as follows.
At first; When the distance H between reflector plate 130 and the diffusion barrier sheet 120 is big more; Though can promote the outgoing light homogeneity of direct type backlight module 100, relatively the integral thickness of direct type backlight module 100 just can become greatly, therefore the thinness of unfavorable direct type backlight module 100.Otherwise, if distance H is reduced and when reducing the spacing P between the light-emitting component 110 simultaneously, though can promote the outgoing light homogeneity of direct type backlight module 100, the quantity of the light-emitting component that is relatively adopted just can increase, and so will cause the burden on the cost.
Therefore present embodiment makes direct type backlight module 100 that more uniform optical field distribution can be provided through above light-emitting component 110, being sequentially provided with above-mentioned diffusion barrier sheet 120 and above-mentioned diffuser plate 140, using.And; Can provide at backlight module 100 under the prerequisite of more uniform optical field distribution; Suitably the distance H between micro reflector plate 130 and the diffusion barrier sheet 120 still can provide suitable outgoing light homogeneity when can make the thickness slimming of direct type backlight module 100; Or be; Can provide at backlight module 100 under the prerequisite of more uniform optical field distribution; Suitably improve the spacing P between the light-emitting component 110; Use the usage quantity that reduces light-emitting component, thereby can reduce the cost of manufacture of direct type backlight module 100 and still suitable outgoing light homogeneity can be provided.In other words, the direct type backlight module 100 of present embodiment satisfies the relational expression of 5%≤H/P≤60%, therefore has above-mentioned advantage.
What deserves to be mentioned is; Though the relational expression that direct type backlight module 100 satisfies 5%≤H/P≤60% just can have above-mentioned advantage; Yet on practice, the reflector plate 130 of present embodiment and the distance H between the diffusion barrier sheet 120 are preferably and satisfy relational expression: 5mm≤H≤20mm; Or the spacing P between the light-emitting component 110 of present embodiment preferably satisfies relational expression: 35mm≤P≤100mm.
In the present embodiment, direct type backlight module 100 also can comprise optical diaphragm group 160, is disposed at the top of diffuser plate 140, and is as shown in Figure 1.In the present embodiment, optical diaphragm group 160 can comprise prismatic lens 162 (prism sheet), brightening piece 164 (brightness enhancement film, BEF), the combination in any of other appropriate optical diaphragm or above-mentioned diaphragm.In the present embodiment, optical diaphragm group 160 is the optical characteristics that are used for promoting area source, for example is brightness, the uniformity or its combination of promoting area source.
Fig. 2 is the partial schematic diagram of the direct type backlight module of another embodiment of the present invention.With reference to figure 1 and Fig. 2, the direct type backlight module 200 of present embodiment adopts identical notion with aforesaid backlight module 100 simultaneously, and the two difference is that the diffuser plate 240 of direct type backlight module 200 has a plurality of diffusion micro-structural 240a, illustrates like Fig. 2.In the present embodiment, dispose a plurality of regularly arranged diffusion micro-structural 240a on the surperficial S1 of at least one dorsad diffusion barrier sheet 120 of diffuser plate 240.In addition, each diffusion micro-structural 240a can decide with design according to user's demand, and spreading micro-structural 240a can be the one of which at least that presents list structure and dots structure, below will carry out related description with Fig. 3 A, Fig. 3 B, Fig. 4 A, Fig. 4 B, Fig. 5 A and Fig. 5 B.
In the embodiment that Fig. 3 A and Fig. 3 B are illustrated, diffusion micro-structural 240a presents list structure, and wherein this list structure can be to present the linearity structure arranged that is illustrated like Fig. 3 A and Fig. 3 B, or the structure of curve-like structure and arc structure and so on.In addition, list structure can be triangular prism, semicolumn, semiellipse post or be plane or circular-arc structure like the top that Fig. 3 A and Fig. 3 B are illustrated.
In the embodiment that Fig. 4 A and Fig. 4 B are illustrated; Diffusion micro-structural 240a presents dots structure; Wherein this dots structure can be to present the regularly arranged quadrangular pyramid structure that is illustrated like Fig. 4 A and Fig. 4 B, or the structure of hemisphere, semiellipse spheroid and pyrometric cone and so on.In addition, also can to present the top that is illustrated like Fig. 4 A and Fig. 4 B be plane or circular-arc structure to dots structure.
In addition, in the embodiment that Fig. 5 A and Fig. 5 B are illustrated, diffusion micro-structural 240a presents the linearity cross structure, and wherein this linearity cross structure can be to present the regularly arranged convex/concave structure that is illustrated like Fig. 5 A and Fig. 5 B.
Know based on above-mentioned; Because the direct type backlight module 200 of present embodiment adopts identical notion with aforesaid backlight module 100; The example that is merely diffuser plate 240 is different; Therefore, direct type backlight module 200 likewise has the mentioned advantage of aforesaid backlight module 100, just repeats no more at this.
Fig. 6 is the partial schematic diagram of the direct type backlight module of further embodiment of this invention.Simultaneously with reference to figure 1, Fig. 2 and Fig. 6; The direct type backlight module 300 of present embodiment adopts identical notion with direct type backlight module 100,200; Wherein difference is, the diffusion barrier sheet 320 of direct type backlight module 300 illustrates like Fig. 6 for having a plurality of bulge-structure 320a.In the present embodiment, the bulge-structure 320a that disposes a plurality of evenly distributed or random alignment on the surperficial S2 of diffuser plate 240a of diffusion barrier sheet 320, wherein Fig. 6 be with evenly distributed as illustrating, but do not exceed with accompanying drawing.In the present embodiment, bulge-structure 320a and diffusion barrier sheet 320 can be one-body molded or moulding separately, and present embodiment is to be example with one-body molded, but is not limited thereto.
Likewise; Because the direct type backlight module 300 of present embodiment adopts identical notion with aforesaid backlight module 100,200; Difference is that the example of diffusion barrier sheet 320 is different; Therefore, direct type backlight module 300 likewise has the mentioned advantage of aforesaid backlight module 100,200, just repeats no more at this.
Fig. 7 is the partial schematic diagram of the direct type backlight module of yet another embodiment of the invention.Simultaneously with reference to figure 1 and Fig. 7; The direct type backlight module 400 of present embodiment adopts identical notion with direct type backlight module 100; The two difference is that direct type backlight module 400 also comprises at least two diffused components 470, and each diffused component 470 is disposed on each light-emitting component 110; Light beam diffusion earlier will be passed to diffusion barrier sheet 120 illustrates like Fig. 7.In the present embodiment, diffused component can be lens element or the translucent element that is mixed with diffusion particle, present embodiment be with lens element as illustrating, but be not limited thereto.
Similarly; Because the direct type backlight module 400 of present embodiment adopts identical notion with aforesaid backlight module 100; The two difference is to dispose diffused component 470 on each light-emitting component 110; Therefore, direct type backlight module 400 likewise has the mentioned advantage of aforesaid backlight module 100, just repeats no more at this.
In addition, Fig. 8 is the sketch map of the LCD MODULE of one embodiment of the invention.With reference to figure 8; The LCD MODULE 500 of present embodiment comprises direct type backlight module 510 and display panels 520; Wherein display panels 520 is disposed at the top of direct type backlight module 510, and direct type backlight module 520 is suitable for providing the backlight BL of display panels 510.
In the present embodiment; Display panels 520 for example is non-light-emitting display panel; Display panels 520 can be transluscent display panel, colored filter in the display floater of (color filter onarray) on the active layer, active layer display floater, vertical orientation type (the Vertical Alignment of (array on color filter) on colored filter; VA) display floater, horizontal switch type (In-PlaneSwitching; IPS) display floater, multi-domain perpendicular alignment-type (Multi-domain Vertical Alignment; MVA) display floater, twisted nematic (Twisted Nematic; TN) display floater, super-twist nematic (Super Twisted Nematic; STN) display floater, pattern vertical orientation type (PatternedVertical Alignment, PVA) display floater, super pattern vertical orientation type (Super-PatternedVertical Alignment, S-PVA) display floater, advanced person type (Advanced Super View with great visual angle; ASV) display floater, fringe field switch type (Fringe-Field Switching; FFS) display floater, continuous fireworks shape arrange type (Continuous Pinwheel Alignment, CPA) display floater, axial symmetry arrangement micella type (Axially Symmetric aligned Microcell, ASM) display floater, optical compensation curved arrange type (Optically Compensated Bend; OCB) display floater, super horizontal switch type (Super-In-Plane Switching; S-IPS) display floater, advanced super horizontal switch type (Advanced Super In-Plane Switching, AS-IPS) display floater, extreme edge electric field switch type (Ultra Fringe Field Switching, the UFFS) combination of display floater or above-mentioned panel.
In addition; The direct type backlight module 510 of present embodiment can be the structure that adopts aforementioned direct type backlight module 100,200,300,400; Thus, LCD MODULE 500 is except can providing preferable display frame, and its integral thickness likewise can have the advantage of slimming.
In sum; The direct type backlight module of embodiments of the invention and LCD MODULE have following one of them advantage at least: at first; Embodiments of the invention make direct type backlight module that more uniform optical field distribution can be provided through above light-emitting component, being sequentially provided with diffusion barrier sheet and diffuser plate.In addition, can provide at direct type backlight module under the prerequisite of more uniform optical field distribution,, still suitable outgoing light homogeneity can be provided when making the integral thickness attenuation of direct type backlight module through the distance between suitable reduction reflector plate and the diffusion barrier sheet.In addition; Also can provide under the prerequisite of more uniform optical field distribution at direct type backlight module; Suitably improve the spacing between the light-emitting component; Use the usage quantity that reduces light-emitting component, thereby still suitable outgoing light homogeneity can be provided when can reduce the cost of manufacture of direct type backlight module.Moreover for reaching above-mentioned advantage, the direct type backlight module of embodiments of the invention satisfies the relational expression of 5%≤H/P≤60%.
The above person; Be merely the preferred embodiments of the present invention; When not limiting the scope that the present invention implements with this, the simple equivalent of promptly doing according to claim of the present invention and invention description generally changes and modifies, and all still belongs in the scope that patent of the present invention contains.Arbitrary embodiment of the present invention in addition or claim must not reached whole purposes or advantage or the characteristics that the present invention discloses.In addition, summary part and title only are the usefulness that is used for assisting the patent document search, are not to be used for limiting interest field of the present invention.
Claims (19)
1. direct type backlight module comprises:
At least two light emitting is disposed in the substrate and said two light emitting at least is suitable for providing respectively light beam, and the spacing of wantonly two adjacent said two light emittings at least is P;
At least one diffusion barrier sheet is disposed at the top of said two light emitting at least and keeps a gap with said two light emitting at least, and is suitable for being passed to said at least one diffusion barrier sheet from the said light beam of said two light emitting at least;
Reflector plate is disposed in the said substrate and is positioned at the periphery of said two light emitting at least, and said reflector plate and said at least one diffusion barrier sheet keep a distance, and wherein said distance is greater than said gap, and said distance is H; And
Diffuser plate be disposed at said at least one diffusion barrier sheet top, and said direct type backlight module satisfies 5%≤H/P≤60%.
2. direct type backlight module as claimed in claim 1, the thickness of wherein said at least one diffusion barrier sheet is less than 0.8mm.
3. direct type backlight module as claimed in claim 1, the mist degree of wherein said at least one diffusion barrier sheet is at least more than or equal to 75%.
4. direct type backlight module as claimed in claim 1 is doped with a plurality of diffusion particles in wherein said at least one diffusion barrier sheet.
5. direct type backlight module as claimed in claim 1, the bulge-structure that disposes a plurality of evenly distributed or random alignment on the surface of said diffuser plate of wherein said at least one diffusion barrier sheet.
6. direct type backlight module as claimed in claim 5, wherein said bulge-structure and the one-body molded or moulding separately of said at least one diffusion barrier sheet.
7. direct type backlight module as claimed in claim 1, the thickness of wherein said diffuser plate is more than or equal to 0.8mm.
8. direct type backlight module as claimed in claim 1 disposes a plurality of regularly arranged diffusion micro-structurals on the surface of said at least one diffusion barrier sheet dorsad of wherein said diffuser plate.
9. direct type backlight module as claimed in claim 8, wherein said diffusion micro-structural are the one of which at least of list structure and dots structure.
10. direct type backlight module as claimed in claim 9, wherein said list structure comprise the one of which at least of linearity structure, linearity cross structure, curve-like structure and arc structure.
11. direct type backlight module as claimed in claim 9, wherein said list structure comprise the one of which at least of triangular prism, semicolumn and semiellipse post.
12. direct type backlight module as claimed in claim 9, wherein said dots structure comprise the one of which at least of hemisphere, semiellipse spheroid, quadrangular pyramid and pyrometric cone.
13. direct type backlight module as claimed in claim 1, wherein said direct type backlight module satisfies 5mm≤H≤20mm.
14. direct type backlight module as claimed in claim 1, wherein said direct type backlight module satisfies 35mm≤P≤100mm.
15. direct type backlight module as claimed in claim 1 also comprises optical diaphragm group, is disposed at the top of said diffuser plate.
16. direct type backlight module as claimed in claim 15, wherein said optical diaphragm group comprise the one of which at least of prismatic lens and brightening piece.
17. direct type backlight module as claimed in claim 1 also comprises at least two diffused components, each said diffused component is disposed on each said light-emitting component, will be passed to the said beam spread of said at least one diffusion barrier sheet.
18. direct type backlight module as claimed in claim 1, wherein said two light emitting at least is respectively light-emitting diode.
19. a LCD MODULE comprises:
Direct type backlight module as claimed in claim 1; And
Display panels be disposed at the top of said direct type backlight module, and said direct type backlight module is suitable for providing the backlight of said display panels.
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| CN2010105102056A CN102444835A (en) | 2010-10-11 | 2010-10-11 | Straight-down type backlight module and liquid crystal display module |
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| CN2010105102056A CN102444835A (en) | 2010-10-11 | 2010-10-11 | Straight-down type backlight module and liquid crystal display module |
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| CN105299556A (en) * | 2014-06-30 | 2016-02-03 | 现代摩比斯株式会社 | Lamp design method for automobile |
| CN110133905A (en) * | 2018-02-08 | 2019-08-16 | 中华映管股份有限公司 | Backlight module and head up display |
| CN111830745A (en) * | 2019-04-16 | 2020-10-27 | 中强光电股份有限公司 | Backlight module and display device |
| CN113376900A (en) * | 2021-01-25 | 2021-09-10 | 深圳市隆利科技股份有限公司 | Straight following formula Mini-LED backlight unit that light-emitting is even |
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| CN2802543Y (en) * | 2005-03-25 | 2006-08-02 | 科桥电子股份有限公司 | Improved structure of backlight mould set |
| CN200993714Y (en) * | 2006-12-19 | 2007-12-19 | 科桥电子股份有限公司 | Backlight module structure improvement |
| CN101285902A (en) * | 2007-04-11 | 2008-10-15 | 颖台科技股份有限公司 | Diffusing plate group |
| CN101463957A (en) * | 2009-01-16 | 2009-06-24 | 友达光电股份有限公司 | Backlight module with stipple pattern and its diffusing plate structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105299556A (en) * | 2014-06-30 | 2016-02-03 | 现代摩比斯株式会社 | Lamp design method for automobile |
| CN105299556B (en) * | 2014-06-30 | 2018-12-21 | 现代摩比斯株式会社 | vehicle lamp design method |
| CN110133905A (en) * | 2018-02-08 | 2019-08-16 | 中华映管股份有限公司 | Backlight module and head up display |
| CN111830745A (en) * | 2019-04-16 | 2020-10-27 | 中强光电股份有限公司 | Backlight module and display device |
| CN113376900A (en) * | 2021-01-25 | 2021-09-10 | 深圳市隆利科技股份有限公司 | Straight following formula Mini-LED backlight unit that light-emitting is even |
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Application publication date: 20120509 |