CN2496052Y - Improved, uniform and high efficiency side lighting type back light source - Google Patents
Improved, uniform and high efficiency side lighting type back light source Download PDFInfo
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- CN2496052Y CN2496052Y CN 01219472 CN01219472U CN2496052Y CN 2496052 Y CN2496052 Y CN 2496052Y CN 01219472 CN01219472 CN 01219472 CN 01219472 U CN01219472 U CN 01219472U CN 2496052 Y CN2496052 Y CN 2496052Y
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- guide plate
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Abstract
The utility model relates to an improved uniform and high-efficient side luminescent back light source, which is an improved design of 98201487.2 Chinese patent, to further improve the luminous efficiency. The utility model mainly comprises a light guide plate, a light source positioned on the side of the light guide plate and a reflective coating arranged under the lower surface of the light guide plate. The light guide plate is improved into a single layer body that punctuated and streaky drop pits or bumps are arranged on the upper and the lower plane by the design, the drop pits or the bumps are arranged into an array shape according to the big and small rules. Or the light guide plate is improved into a double-layered or a multi-layered structure body overlapped by two or more than two sub-light guide plates in a combined method, the sub-light guide plate can be a single-sided concavo-convex shape or a double-sided concavo-convex shape, or the combination of the single-sided concavo-convex shape and the double-sided concavo-convex shape.
Description
The utility model relates to a kind of backlight, relates to the luminous backlight of a kind of luminous uniform high-level efficiency side or rather, as is used for the background illumination of monochrome or colour, multi-color LCD LCD display etc.
The applicant is at the Chinese patent 98201487.2 of first to file, " the luminous backlight of the side of uniform high-efficiency ", the luminous backlight of the side that is proposed, comprise light guide plate, be positioned at the luminescence chip and the light source of light guide plate side, with the diffusion barrier and the reflectance coating that lay respectively at light guide plate top and below, the upper surface of light guide plate is minute surface or hair side, the lower surface of light guide plate is provided with the pit or the projection of point-like or strip, light is injected from the light guide plate side, light guide plate lower surface and pit or projection are tangent and become non-parallel or vertical edge folding with source light, reflected light, it is then unglazed to form parallel edge, this structure luminescence efficiency can be brought up to more than 30% and luminous evenly.
Fig. 1 illustrates the combination synoptic diagram by the part-structure of the luminous backlight of side of above-mentioned patented technology design, comprise light guide plate 11, reflectance coating 12, light source 13 and photomask 14, light guide plate 11 only is provided with the concave-convex 111 of arranging according to certain rules on a face, another side then is the hair side (non-male and fomale(M﹠F)) 112 of minute surface or frosted.Arrow is depicted as that light is injected and the folding of light, reflection paths among the figure, light is injected the light guide plate from the side of light guide plate 14, wherein a part penetrates from the male and fomale(M﹠F) folding of light guide plate, the minute surface that reflects and pass light guide plate 14 or hair side (non-male and fomale(M﹠F)) 112, forms luminous uniform background light source.
Along with the development of flat panel display, increasing with the demand of light source for the flat-panel monitor of high brightness low-power consumption, performance requirement is also more and more higher, and wherein, the effective luminescence efficiency that improves light guide plate has become the important topic of this technical field.
The purpose of this utility model is the luminous backlight of a kind of improved uniform high-efficiency rate side of design, on the basis of aforementioned patent technology, by improving the design light guide plate, with effective luminescence efficiency of the luminous backlight of further raising side.
The technical scheme that realizes the utility model purpose is such: the luminous backlight of a kind of improved uniform high-efficiency rate side, comprise light guide plate, light source and reflectance coating, and reflectance coating is arranged on the lower surface of light guide plate, it is characterized in that:
Be equipped with the pit or the projection of point-like or strip on upper and lower two surfaces of described light guide plate, pit or projection are regularly arranged into array-like by size.
Described pit or projection are through hot pressing or injection mo(u)lding on upper and lower two surfaces in a light guide plate.
Described light guide plate by two single faces be provided with pit or the projection first light guide plate and second light guide plate spatially stack combinations constitute, the one side that second light guide plate is provided with pit or projection contacts with the non-male and fomale(M﹠F) of first light guide plate, and the one side that first light guide plate is provided with pit or projection is the lower surface of light guide plate.
Described light guide plate by first light guide plate and second light guide plate spatially stack combinations constitute, upper and lower two the surperficial hot pressing or the injection mo(u)lding of described first light guide plate have pit or projection, the described second light guide plate single face is provided with pit or projection, one side and first light guide plate that second light guide plate is provided with pit or projection is provided with pit or projection arbitrary and contacts, and the another side that first light guide plate is provided with pit or projection is the lower surface of light guide plate.The minute surface of second light guide plate or hair side (non-male and fomale(M﹠F)) are the upper surface of backlight light guide plate.
Described light guide plate by first light guide plate and second light guide plate spatially stack combinations constitute, upper and lower two the surperficial hot pressing or the injection mo(u)lding of described first light guide plate have pit or projection, upper and lower two the surperficial hot pressing or the injection mo(u)lding of described second light guide plate have pit or projection, second light guide plate is provided with pit or projection arbitrary and is provided with pit or projection arbitrary with first light guide plate and contacts, and first light guide plate is provided with pit or protruding another side is the lower surface of light guide plate.
Described light guide plate by first light guide plate, second light guide plate, the 3rd light guide plate spatially stack combinations constitute, hot pressing or injection mo(u)lding have pit or projection on upper and lower two surfaces of described first, second, third light guide plate, second light guide plate is provided with pit or projection arbitrary and is provided with pit or projection arbitrary with first light guide plate and contacts, and the 3rd light guide plate is provided with pit or projection arbitrary and is provided with pit or protruding arbitrary with second light guide plate and contacts.
Described light guide plate comprises lower floor's light guide plate at least, and this lower floor's light guide plate has at least a surface to be provided with pit or projection, and as the lower surface of light guide plate; Also comprise 1 upper strata light guide plate and N middle layer light guide plate, the upper strata light guide plate has at least a surface to be provided with pit or projection, and contacts with described middle layer light guide plate; Have at least a surface to be provided with pit or projection on the light guide plate of described middle layer, and contact with described upper strata light guide plate and lower floor's light guide plate respectively, described N comprises 0 positive integer.
Described point-like pit or raise into circle or triangularity or rectangularity or become bent limit shape or polygon that quadrangularly is above.
Described light source is arranged on side or two sides or three sides or four sides of described light guide plate; Described light source is that single light source or arranged by more than one single light source is provided with.
The thickness of described light guide plate is 0.1mm-20mm, is that transmittance is the transparent rigid or flexibility material of 50%-100%.
The maximum physical dimension of described pit or projection is that 0.01mm is to length that equals described light guide plate or width; The depth capacity of described pit or projection or be that highly 0.001mm is to the thickness that equals described light guide plate.
Also include diffusion barrier, be arranged on the upper surface of described light guide plate; Also include photomask, be arranged on the light source outside.
Also include bright enhancement film or diaphragm, or the stack assemblies of bright enhancement film and diaphragm, or the stack assemblies of diffusion barrier, bright enhancement film and diaphragm, be arranged on the upper surface of described light guide plate.
Described pit or projection, the described light source of distance is near more then more little thin more, and the described light source of distance is far away more then big more close more.
The luminous backlight of the improved uniform high-efficiency rate of the utility model side all is provided with the pit or the projection of arranging according to certain rules on two faces of individual layer light guide plate; Can also form by bilayer or sandwich construction, the upper surface of light guide plate reflects light by concave-convex, the lower surface of light guide plate also can directly reflect light by concave-convex, and reflex on the reflectance coating that is positioned at its below, most reflected light can both pass light guide plate and penetrates from the upper surface of light guide plate on the reflectance coating, thereby improve the luminescence efficiency of light guide plate greatly, under the good situation of light guide plate whole clearing degree, and when the concave-convex of its upper and lower surface had good arrangement design and size design, the optical efficiency of other backlight that optical efficiency is more popular than existing market can improve more than 50%.
Further specify technology of the present utility model below in conjunction with embodiment and accompanying drawing.
Fig. 1 is a Chinese patent 98201487.2, " the luminous backlight of the side of uniform high-efficiency " structural representation.
Fig. 2 is the first example structure synoptic diagram of the luminous backlight of the utility model improved uniform high-efficiency rate side.
Fig. 3 is the second example structure synoptic diagram of the luminous backlight of the utility model improved uniform high-efficiency rate side.
Fig. 4 is the 3rd an example structure synoptic diagram of the luminous backlight of the utility model improved uniform high-efficiency rate side.
Fig. 5 is the 4th an example structure synoptic diagram of the luminous backlight of the utility model improved uniform high-efficiency rate side.
Fig. 6 is the 5th an example structure synoptic diagram of the luminous backlight of the utility model improved uniform high-efficiency rate side.
Addressed before Fig. 1 illustrates and repeated no more.
Among Fig. 2 to Fig. 6,20 is reflectance coating, is positioned at the below of light guide plate 50; 30 is light source, is positioned at the light guide plate side, as the LED luminescence chip, and PCB2 or CCF cold cathode ray tube or incandescent lamp bulb etc.; 40 is photomask, is positioned at the outside of light source 30, and 50 is light guide plate.Omit the diffusion barrier or the diffusion barrier that are positioned at light guide plate top among the figure and added bright enhancement film or any film, as diaphragm, the perhaps combination in any of these films.
The key distinction of Fig. 2 to Fig. 6 embodiment is the composition of light guide plate 50.Arrow illustrates folding, the reflection paths of injecting of light and light among the figure.
Wherein the light guide plate 50 among Fig. 2 embodiment is individual layers that a upper and lower surface is provided with pit or projection, and this pit or projection are through hot pressing or injection mo(u)lding on upper and lower two surfaces in a light guide plate.
The luminous backlight of improved side of the present utility model; lower surface in light guide plate is provided with reflectance coating; upper surface in light guide plate is provided with diffusion barrier; the upper surface of light guide plate also can be provided with diffusion barrier and add bright enhancement film; or increase any film at the upper surface of light guide plate, comprise diffusion barrier, bright enhancement film, diaphragm and their combination in any.
By the foregoing description as can be known, the luminous backlight of improved side of the present utility model, except can be pit or projection that the upper and lower uniform surface body setting of light guide plate is arranged according to certain rules, its light guide plate can also be a kind of by the superimposed layer structure of forming of polylith branch light guide plate.In this minute light guide plate, comprise lower floor's light guide plate at least, this lower floor's light guide plate has at least a surface to be provided with pit or projection, and as the lower surface of light guide plate; Also comprise 1 upper strata light guide plate and N middle layer light guide plate, N comprises 0 positive integer (N is, promptly structure) as shown in Figure 3, Figure 4 at 0 o'clock, and the upper strata light guide plate has at least a surface to be provided with pit or projection, and contacts with described middle layer light guide plate; The upper and lower surface of middle layer light guide plate has at least a surface to be provided with pit or projection, and contacts with upper strata light guide plate and lower floor's light guide plate respectively.
The light guide plate of the luminous backlight of the utility model side can be individual layer, bilayer or multilayer structure making, can improve the luminescence efficiency of light guide plate greatly.Two-sided backlight or the available 2PCS that is made up of the light guide plate of male and fomale(M﹠F) of individual layer has the cancavo-convex light guide plate of single or double to merge stacked use, or has cancavo-convex light guide plate to add 1PCS with the 1PCS single face to have the light guide plate of two-sided concave-convex shape to merge stacked use.Because the concave-convex on the upper and lower surface of light guide plate all can roll over, reflected light, each layer light guide plate reflexes to light on the reflectance coating of below, and reflectance coating reflects wherein most of light and passes light guide plate and from the upper surface ejaculation, make optical efficiency improve 30% at least.If cancavo-convex reasonable in design on the light guide plate, the integral light-transmitting rate of light guide plate is very high, and configures light source, and optical efficiency can improve more than 50%.
In a word, the luminous backlight of the improved side of the utility model, the two-sided optical efficiency that the light guide plate of concave-convex or combination layer structure is arranged, to be much higher than common light guide plate, and luminous visual angle is big, is suitable for making backlight in various LCD flat panel displays, comprises the color LCD flat-panel monitor.
Claims (13)
1. the luminous backlight of improved uniform high-efficiency rate side comprises light guide plate, light source and reflectance coating, and reflectance coating is arranged on the lower surface of light guide plate, it is characterized in that:
Be equipped with the pit or the projection of point-like or strip on upper and lower two surfaces of described light guide plate, pit or projection are regularly arranged into array-like by size.
2. the luminous backlight of a kind of improved uniform high-efficiency rate side according to claim 1 is characterized in that: described pit or projection are through hot pressing or injection mo(u)lding on upper and lower two surfaces in a light guide plate.
3. the luminous backlight of a kind of improved uniform high-efficiency rate side according to claim 1, it is characterized in that: described light guide plate by two single faces be provided with pit or the projection first light guide plate and second light guide plate spatially stack combinations constitute, the one side that second light guide plate is provided with pit or projection contacts with the non-male and fomale(M﹠F) of first light guide plate, and the one side that first light guide plate is provided with pit or projection is the lower surface of light guide plate.
4. the luminous backlight of a kind of improved uniform high-efficiency rate side according to claim 1, it is characterized in that: described light guide plate by first light guide plate and second light guide plate spatially stack combinations constitute, hot pressing or injection mo(u)lding have pit or projection on upper and lower two surfaces of described first light guide plate, the described second light guide plate single face is provided with pit or projection, one side and first light guide plate that second light guide plate is provided with pit or projection is provided with pit or projection arbitrary and contacts, and the another side that first light guide plate is provided with pit or projection is the lower surface of light guide plate.
5. the luminous backlight of a kind of improved uniform high-efficiency rate side according to claim 1, it is characterized in that: described light guide plate by first light guide plate and second light guide plate spatially stack combinations constitute, on described first light guide plate, hot pressing or injection mo(u)lding have pit or projection on following two surfaces, on described second light guide plate, hot pressing or injection mo(u)lding have pit or projection on following two surfaces, second light guide plate is provided with pit or projection arbitrary and is provided with pit or projection arbitrary with first light guide plate and contacts, and first light guide plate is provided with pit or protruding another side is the lower surface of light guide plate.
6. the luminous backlight of a kind of improved uniform high-efficiency rate side according to claim 1, it is characterized in that: described light guide plate is by first light guide plate, second light guide plate, the 3rd light guide plate spatially stack combinations constitutes, described first, second, on the 3rd light guide plate, hot pressing or injection mo(u)lding have pit or projection on following two surfaces, second light guide plate is provided with pit or projection arbitrary and is provided with pit or projection arbitrary with first light guide plate and contacts, and the 3rd light guide plate is provided with pit or projection arbitrary and is provided with pit or protruding arbitrary with second light guide plate and contacts.
7. the luminous backlight of a kind of improved uniform high-efficiency rate side according to claim 1, it is characterized in that: described light guide plate comprises lower floor's light guide plate at least, this lower floor's light guide plate has at least a surface to be provided with pit or projection, and as the lower surface of light guide plate; Also comprise 1 upper strata light guide plate and N middle layer light guide plate, the upper strata light guide plate has at least a surface to be provided with pit or projection, and contacts with described middle layer light guide plate; Have at least a surface to be provided with pit or projection on the light guide plate of described middle layer, and contact with described upper strata light guide plate and lower floor's light guide plate respectively, described N comprises 0 positive integer.
8. the luminous backlight of a kind of improved uniform high-efficiency rate side according to claim 1 is characterized in that: described point-like pit or raise into circle or triangularity or rectangularity or become bent limit shape or polygon that quadrangularly is above.
9. the luminous backlight of a kind of improved uniform high-efficiency rate side according to claim 1 is characterized in that: described light source is arranged on side or two sides or three sides or four sides of described light guide plate; Described light source is that single light source or arranged by more than one single light source is provided with.
10. the luminous backlight of a kind of improved uniform high-efficiency rate side according to claim 1, it is characterized in that: the thickness of described light guide plate is 0.1mm-20mm, is that transmittance is the transparent rigid or flexibility material of 50%-100%.
11. the luminous backlight of a kind of improved uniform high-efficiency rate side according to claim 1 is characterized in that: the maximum physical dimension of described pit or projection is that 0.01mm is to length that equals described light guide plate or width; The depth capacity of described pit or projection or be that highly 0.001mm is to the thickness that equals described light guide plate.
12., it is characterized in that: also include diffusion barrier, be arranged on the upper surface of described light guide plate according to the luminous backlight of the described a kind of improved uniform high-efficiency rate side of claim 1 to 11; Also include photomask, be arranged on the light source outside.
13. according to the luminous backlight of the described a kind of improved uniform high-efficiency rate side of claim 1 to 11; it is characterized in that: also include bright enhancement film or diaphragm; or the stack assemblies of bright enhancement film and diaphragm; or the stack assemblies of diffusion barrier, bright enhancement film and diaphragm, be arranged on the upper surface of described light guide plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01219472 CN2496052Y (en) | 2001-04-13 | 2001-04-13 | Improved, uniform and high efficiency side lighting type back light source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01219472 CN2496052Y (en) | 2001-04-13 | 2001-04-13 | Improved, uniform and high efficiency side lighting type back light source |
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| CN2496052Y true CN2496052Y (en) | 2002-06-19 |
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| CN 01219472 Expired - Lifetime CN2496052Y (en) | 2001-04-13 | 2001-04-13 | Improved, uniform and high efficiency side lighting type back light source |
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