CN1794064A - Matric full image backlight module having optical grating point - Google Patents
Matric full image backlight module having optical grating point Download PDFInfo
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- CN1794064A CN1794064A CN 200610051315 CN200610051315A CN1794064A CN 1794064 A CN1794064 A CN 1794064A CN 200610051315 CN200610051315 CN 200610051315 CN 200610051315 A CN200610051315 A CN 200610051315A CN 1794064 A CN1794064 A CN 1794064A
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- light
- diaphragm
- backlight module
- adds lustre
- supporting body
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Abstract
A back light module with grating points consists of a light source for generating light, a reflecting plate for reflecting light emitted by light source, a light guide plate for guiding lights reflected by reflecting plate and generated by light source and a light intensifying film with multiple spherical micro lens for focusing light emitted by light guide plate.
Description
Technical field
The present invention relates to a kind of backlight liquid crystal display module that is used in, particularly relate to a kind of backlight module with the diaphragm that adds lustre to of sphere micromirror.
Background technology
Backlight module (Back light module) is LCD (Liquid crystal display, LCD) one of key part and component, because liquid crystal itself is not luminous, the function of backlight module promptly is well-off brightness and the light source that is evenly distributed, change into the area source of high brightness and homogeneous briliancy by succinct effectively optical mechanism, so that the display panels back light to be provided.Display panels now has been widely used in the electronic product of tool growth potentiality such as monitor, mobile computer, digital camera and projector, especially with large scales such as mobile computer and LCD monitor panel demand maximum, also therefore grow up also strong day by day for the backlight module demand.
See also Fig. 1, Fig. 1 is the structural representation of existing backlight module 20.Mainly (Brightness Enhancement Film, BEF) assemblies such as 30,32 assemble backlight module 20 by light source (for example cold cathode fluorescent tube, thermic cathode fluorimetric pipe, light emitting diode) 22, reflecting plate (Reflector) 24, light guide plate (Light guide plate) 26, diffusion sheet (Diffusion sheet) 28 and prismatic lens.After the light that light source 22 penetrates enters light guide plate 26, can guide the light source of injecting it is scattered in uniform surface light source, the reflecting plate 24 that is arranged in light guide plate 26 1 sides can prevent that light source from leaking outside with the light reflected back light guide plate 26 of directive reflecting plate 24 directions, to increase the service efficiency of light.The light that is penetrated by light guide plate 26 through the light harvesting effect of equal light action and the prismatic lens 30,32 of diffusion sheet 28, after the brightness and uniformity coefficient of raising light source, launches light in the liquid crystal panel more again.Prismatic lens 30,32 generally is to utilize high energy ultraviolet ray (UV) light that acrylic resin (Acrylic Resin) is hardened into the microscopic prisms structure on polynary fat (polyester) optical thin film of thickness 125 μ m.The Tp of conventional prism sheet 30,32 regular stripe-arrangement, and each prism average headway is 50 μ m, about 90 degree of prism vertex angle.The main function of prismatic lens 30,32 will upwards reflect and be concentrated to positive visual angle (On-axis) direction of degree approximately ± 35 from the light that light guide plate 26 is issued to ghost line from all directions by refraction and inner full-reflection, to improve front face brightness, that is to say, prismatic lens 30 can only be concentrated the component of light on Y-axis, and prismatic lens 32 can only be concentrated the component of light on X-axis.If only use a prismatic lens can make front face brightness improve 1.6 times, if use two prismatic lenses that are homeotropic alignment, then front face brightness can be improved more than 2 times, so in order to reach preferable spotlight effect, generally can use two orthogonal prismatic lenses 30,32 of stripe-arrangement direction.In other words, originally too disperse the screen that shows dull because of light, can be the light of originally dispersing is concentrated to the centre, and 2 times of blasts immediately because of prism, thus, can reduce power consumption and prolong battery service time.
Yet, single prismatic lens can only be concentrated to ghost line from all directions the positive view directions of about ± 35 degree on the single shaft, if the light of X, Y-axis will be concentrated to positive visual angle side, then need two prismatic lenses, two prismatic lenses are to cause the reason of backlight module cost under being in not, and light is by getting over the multi-disc diaphragm, luminous energy meeting loss.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of backlight module, to replace the existing backlight module that needs to use two prismatic lenses, to solve above-mentioned prior art problems with the diaphragm that adds lustre to of a plurality of spherical microlens.
The invention provides a kind of backlight module, it comprises a light source, is used for producing light; One reflector plate is used for reflecting the light that this light source penetrates; One light guide plate is used for assembling the light of this light source generation and the light of this reflector plate reflection; And the diaphragm that adds lustre to, it comprises a plurality of spherical microlens, is used for assembling this light guide plate and penetrates light.
Advantage of the present invention is promptly utilized the diaphragm that adds lustre to, and has a plurality of spherical microlens on this diaphragm that adds lustre to.Because the design of the sphere of spherical microlens, feasible divergent rays from light guide plate can once concentrate on positive view directions.This improvement needs two prismatic lenses out-of-alignment light could be concentrated to the shortcoming of positive visual angle side traditionally.
Description of drawings
Fig. 1 is the structural representation of existing backlight module;
Fig. 2 is the structural representation of backlight module of the present invention;
Fig. 3 is the partial enlarged drawing of first embodiment of the diaphragm that adds lustre to of Fig. 2;
Fig. 4 is the side view of first embodiment of the diaphragm that adds lustre to of Fig. 2;
Fig. 5 is the partial enlarged drawing of second embodiment of the diaphragm that adds lustre to of Fig. 2;
Fig. 6 is the side view of second embodiment of the diaphragm that adds lustre to of Fig. 2;
Fig. 7 is the partial enlarged drawing of the 3rd embodiment of the diaphragm that adds lustre to of Fig. 2;
Fig. 8 is the side view of the 3rd embodiment of the diaphragm that adds lustre to of Fig. 2;
Fig. 9 is the course synoptic diagram of light through add lustre to diaphragm and light guide plate;
Figure 10 A-Figure 10 I is the add lustre to process flow diagram of diaphragm of manufacturing of the present invention;
Figure 11 is first photo-corrosion-resisting agent composition and the external view of second photo-corrosion-resisting agent composition behind hot melt.
The primary clustering symbol description:
20 backlight modules, 22 light sources
24 reflecting plates, 26 light guide plate
28 diffuser plates, 30,32 prismatic lenses
50 backlight modules, 54 reflecting plates
56 light guide plate, 58 diffusion sheets
The 60 diaphragm 62a-62c spherical microlens of adding lustre to
64a-64c supporting body 200 substrates
210 first photo-corrosion-resisting agent compositions, 220 second photo-corrosion-resisting agent compositions
230 thin nickel metal films, 240 nickel cobalt thin films
250 gold medal metallic films, 260 film benevolence
270 metal dies, 280 plastics
Embodiment
See also Fig. 2, Fig. 2 is the structural representation of backlight module 50 of the present invention.Backlight module 50 can be applicable to a LCD.Backlight module 50 comprises a light source 52, a reflecting plate 54, a light guide plate 56 and a diaphragm 60 that adds lustre to.After the light that light source 52 penetrates enters light guide plate 56, can guide the light source of injecting it is scattered in uniform surface light source, in the light reflected back light guide plate 56 of reflecting plate 54 meetings with directive reflecting plate 54 directions, prevent that light source from leaking outside, to increase the service efficiency of light.The light that is penetrated by light guide plate 56 is again through the light harvesting effect of equal light action with the diaphragm 60 that adds lustre to of diffusion sheet 58, improve the brightness and uniformity coefficient of light source after, launch light in the liquid crystal panel again.In Fig. 2, diffusion sheet 58 is arranged at and adds lustre between diaphragm 60 and the light guide plate, yet among other embodiment, diffusion sheet 58 also can place on the diaphragm 60 that adds lustre to, even need not to dispose diffusion sheet and also can.
See also Fig. 3 to Fig. 8.Fig. 3 and Fig. 4 are respectively the partial enlarged drawing and the side view of first embodiment of the diaphragm 60 that adds lustre to of Fig. 2.The diaphragm 60 that adds lustre to comprises a plurality of spherical microlens 62a, and each spherical microlens 62a is formed on the supporting body 64a, between the supporting body 64a for closely adjacent.Supporting body 64a is triangle haply.
See also Fig. 5 and Fig. 6.Fig. 5 and Fig. 6 are respectively the partial enlarged drawing and the side view of second embodiment of the diaphragm 60 that adds lustre to of Fig. 2.The diaphragm 60 that adds lustre to comprises a plurality of spherical microlens 62b, and each spherical microlens 62b is formed on the supporting body 64b, between the supporting body 64b for closely adjacent.Supporting body 64b is rectangle haply.
See also Fig. 7 and Fig. 8.Fig. 7 and Fig. 8 are respectively the partial enlarged drawing and the side view of the 3rd embodiment of the diaphragm 60 that adds lustre to of Fig. 2.The diaphragm 60 that adds lustre to comprises a plurality of spherical microlens 62c, and each spherical microlens 62c is formed on the supporting body 64c, between the supporting body 64c for closely adjacent.Supporting body 64c is sexangle haply.
In order to reach preferable spotlight effect, adjustment supporting body 64a that can be appropriate, the thickness of 64b, 64c are to obtain preferable depth-to-width ratio (h/w).Even can under original supporting body 64a, 64b, 64c, increase one deck supporting body again, with the add lustre to depth-to-width ratio of diaphragm 60 of raising.
See also Fig. 9, Fig. 9 is the synoptic diagram of light through add lustre to diaphragm 60 and light guide plate 56.The spherical microlens 62 of diaphragm 60 is an approximate spheroid owing to add lustre to, so no matter the divergent rays of being injected by light guide plate 56 can see through spherical microlens 62 deviations (refract) and ejaculation up from which angle.
See also Figure 10 A-Figure 10 I, Figure 10 A-Figure 10 I is the add lustre to schematic flow sheet of diaphragm of manufacturing of the present invention.In Figure 10 A, earlier one first photo-corrosion-resisting agent composition (for example AZ9260) 210 evenly coated on the substrate 200 in the mode of spin coating (spin coating).Again one second photo-corrosion-resisting agent composition (for example AZ4620) 220 coated on first photo-corrosion-resisting agent composition 210 in the mode of spin coating.The fusing point that note that first photo-corrosion-resisting agent composition 210 is greater than second photo-corrosion-resisting agent composition 220.Next, in Figure 10 B, with etched mode etching first photo-corrosion-resisting agent composition 210 of gold-tinted and second photo-corrosion-resisting agent composition 220 to form the pattern of array.Then shown in Figure 10 C, be heated to certain high temperature and make win photo-corrosion-resisting agent composition 210 and second photo-corrosion-resisting agent composition, 220 beginning hot melts (reflow).Because the fusing point of first photo-corrosion-resisting agent composition 210 is greater than second photo-corrosion-resisting agent composition 220, thus in the process of heating, second photo-corrosion-resisting agent composition 220 can be earlier hot melt and first photo-corrosion-resisting agent composition 210 does not also have complete hot melt fully.But hot melt becomes the second liquid photo-corrosion-resisting agent composition 220 can be subjected to the influence of self tension force and forms dome shape.Shown in Figure 10 D, after cooling, on second photo-corrosion-resisting agent composition 220 of dome shape and first photo-corrosion-resisting agent composition 210 with mode plating one deck thin nickel metal film 230 of film sputter (sputter).
Next, shown in Figure 10 E, on thin nickel metal film 230, electroplate nickel cobalt (Ni-Co) film 240.Sputter one deck gold metallic film 250 on nickel cobalt thin film 240 more afterwards.Afterwards, shown in Figure 10 F, Figure 10 G, first photo-corrosion-resisting agent composition 210 and second photo-corrosion-resisting agent composition 220 that is coated with metallic film 230,240,250 carried out electroforming (electro-forming), to form a die 260.Last be made into metal die 270 in the mode of secondary electroforming or electrodischarge machining again.Afterwards shown in Figure 10 H and Figure 10 I, can plastics 280 (as polynary fat (polyester) or polycarbonate (polycarbonate)) be formed the diaphragm 60 that adds lustre in the mode of volume productions such as ejection formation or low-grade fever be molded according to metal die 270 with these a plurality of spherical microlens.
Though in Fig. 3, Fig. 5, Fig. 7, desirable spherical microlens 62a, 62b, 62c are roughly a spheroid.But make in the process of metal die 270 in reality, when hot melt first photo-corrosion-resisting agent composition 210 and second photo-corrosion-resisting agent composition 220, fully second photo-corrosion-resisting agent composition 220 of hot melt can be subjected to half hot melt first photo-corrosion-resisting agent composition 210 influence and present as shown in figure 11 shape.So the shape of the spherical microlens on the diaphragm 60 that adds lustre to that metal die 270 is produced also can be similar to the shape of Figure 11.
Be compared to prior art, backlight module of the present invention utilizes one to add lustre to diaphragm to replace the structure of two prismatic lenses of tradition, has a plurality of spherical microlens on this diaphragm that adds lustre to.Because the design of the sphere of spherical microlens, feasible divergent rays from light guide plate can once concentrate on positive view directions.This improvement needs two prismatic lenses out-of-alignment light could be concentrated to the shortcoming of positive visual angle side traditionally.And the diaphragm that adds lustre to of the present invention has light harvesting and equal effects of light concurrently.In such event, use the single diaphragm that adds lustre to not only to reduce cost, and light also no longer needs to penetrate two-layer prismatic lens, also can reduce the loss of luminous energy.
Though disclosed the present invention in conjunction with above preferred embodiment; yet it is not in order to limiting the present invention, anyly is familiar with this operator, without departing from the spirit and scope of the present invention; can do some and change and retouching, so protection scope of the present invention should be with appended being as the criterion that claim was defined.
Claims (14)
1. backlight module comprises:
One light source;
One light guide plate is used for guiding the light that this light source produces; And
One diaphragm that adds lustre to, it comprises a plurality of spherical microlens, is used for assembling the light that this light guide plate penetrates.
2. backlight module as claimed in claim 1 more comprises a reflector plate, is used for reflecting the emitted light of this light source.
3. backlight module as claimed in claim 1, wherein this diaphragm that adds lustre to more comprises a plurality of supporting bodies, each spherical microlens of this diaphragm that adds lustre to is arranged on one of them corresponding supporting body.
4. backlight module as claimed in claim 3, wherein triangular in shape, rectangle of this each supporting body or sexangle.
5. backlight module as claimed in claim 3, wherein between each supporting body for closely adjacent.
6. backlight module as claimed in claim 1 more comprises a diffusion sheet, is arranged at this light guide plate and this adds lustre between the diaphragm.
7. backlight module as claimed in claim 1 more comprises a diffusion sheet, is arranged on this diaphragm that adds lustre to.
8. backlight module as claimed in claim 1, wherein these a plurality of spherical microlens are polynary fat or polycarbonate material.
9. a LCD comprises a backlight module as claimed in claim 1.
10. diaphragm that adds lustre to comprises:
One substrate;
A plurality of first supporting bodies are arranged on this substrate; And
A plurality of spherical microlens, wherein each spherical microlens is arranged on one of them corresponding first supporting body.
11. the matrix that adds lustre to as claimed in claim 10, wherein should each first supporting body triangular in shape, rectangle or sexangle.
12. the matrix that adds lustre to as claimed in claim 10 is wherein closely adjacent between each first supporting body.
13. the matrix that adds lustre to as claimed in claim 10, wherein these a plurality of spherical microlens are polynary fat or polycarbonate material.
14. the matrix that adds lustre to as claimed in claim 10 more comprises a plurality of second supporting bodies, should be arranged on this each second supporting body, in order to increase the depth-to-width ratio of this diaphragm that adds lustre to by each first supporting body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100513154A CN100385316C (en) | 2006-01-05 | 2006-01-05 | Matric full image backlight module having optical grating point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100513154A CN100385316C (en) | 2006-01-05 | 2006-01-05 | Matric full image backlight module having optical grating point |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1794064A true CN1794064A (en) | 2006-06-28 |
| CN100385316C CN100385316C (en) | 2008-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100513154A Active CN100385316C (en) | 2006-01-05 | 2006-01-05 | Matric full image backlight module having optical grating point |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949498A (en) * | 2010-09-07 | 2011-01-19 | 友达光电股份有限公司 | Light-emitting element, backlight module and liquid crystal display device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI426302B (en) | 2010-02-12 | 2014-02-11 | Au Optronics Corp | Display device and light enhancement film of the display device |
| CN101794044A (en) * | 2010-03-12 | 2010-08-04 | 友达光电股份有限公司 | Display device and bright enhancement film thereof |
| CN102305959B (en) * | 2011-09-05 | 2013-09-11 | 上海交通大学 | Focusing system having grating structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3269644B2 (en) * | 1991-08-07 | 2002-03-25 | 大日本印刷株式会社 | Manufacturing method of micro lens |
| US6876408B2 (en) * | 2000-02-14 | 2005-04-05 | Fuji Photo Film Co., Ltd. | Collimating plate, lighting apparatus and liquid crystal display apparatus |
| JP2002214405A (en) * | 2001-01-22 | 2002-07-31 | Omron Corp | Lens array substrate and image display device |
| KR20050083468A (en) * | 2004-02-23 | 2005-08-26 | 엘지전자 주식회사 | Liquid crystal display with backlight device using microlens array sheet and a manufacturing method of microlens array sheet |
| CN1680849A (en) * | 2004-04-08 | 2005-10-12 | 鸿富锦精密工业（深圳）有限公司 | Focusing sheet and backlight modules therewith |
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2006
- 2006-01-05 CN CNB2006100513154A patent/CN100385316C/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949498A (en) * | 2010-09-07 | 2011-01-19 | 友达光电股份有限公司 | Light-emitting element, backlight module and liquid crystal display device |
| CN101949498B (en) * | 2010-09-07 | 2013-09-18 | 友达光电股份有限公司 | Light-emitting element, backlight module and liquid crystal display device |
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| Publication number | Publication date |
|---|---|
| CN100385316C (en) | 2008-04-30 |
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