CN1525219A - Improved type backlight module with straightly-down luminous tube structure - Google Patents
Improved type backlight module with straightly-down luminous tube structure Download PDFInfo
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- CN1525219A CN1525219A CNA031067565A CN03106756A CN1525219A CN 1525219 A CN1525219 A CN 1525219A CN A031067565 A CNA031067565 A CN A031067565A CN 03106756 A CN03106756 A CN 03106756A CN 1525219 A CN1525219 A CN 1525219A
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- backlight module
- light
- tube structure
- lamp tube
- light source
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Abstract
The invention is a modified direct-casting tube structure's backlight module, by the special design for light guide board surface, settling a problem of uneven light strength. It includes: a light source; a reflector plate below the light source to enhance its brightness; and a light guide board above the light source, where the first part of the light guide board's bottom surface over the light source is a plane and the second part of the light guide board's bottom surface not over the light source has many bumps, to gather the light to increase the light strength in the second part.
Description
Technical field
The present invention relates to a kind of large-scale LCD, particularly relate to a kind of large-scale LCD that the backlight module of straight-down negative lamp tube structure is arranged.
Background technology
LCD is not luminous because of liquid crystal itself, need possess a light emitting module and make lyo-luminescence reach a suitable brightness, make when not having light still can video picture on screen.With notebook computer, 70% power supply is consumed by light emitting module.Therefore, improve the brightness of light emitting module, or use the light source of lower-wattage and obtain the efficient that identical brightness all can improve light emitting module, save the consumption of power supply.
Existing application generally is the backlight module 110 based on the full run-down type lamp tube structure in the light emitting module structure of large-scale LCD, please refer to shown in Figure 1ly, and it comprises: a light source 112; One light guide plate 114; One reflector plate 116; One diffusion sheet 118; With a rhombus lens 120.Light source 112 is by a row cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL) form, (light emitting diode, LED) formed matrix replaces aforesaid cold cathode fluorescent lamp (CCFL) by light emitting diode but we also can use.Light guide plate 114, its material are generally acryl, and (polymethylmethacrylate PMMA) or optical plastic (Plastic Division is commonly called as PC material or plastic rubber material), includes 50～80% titania (TiO therein
2) diffusion grain 122, its role is to when penetrating and during towards light guide plate 114 surface ejaculations, running into titania (TiO from the light of light source 112 emissions
2) diffusion grain 122 can be by scattering more equably.Reflector plate 116 places light source 114 belows, reflects back towards light guide plate 114 once more in order to the light that will maybe be reflected downwards when entering light guide plate 114 from the light that light source 112 penetrates downwards, to improve the brightness of backlight module 110.Usually can add diffusion sheet 118 and rhombus lens 120 above light guide plate 114, both numbers are decided on the design of backlight module 110, and diffusion sheet 118 and rhombus lens 120 also are to be used for further improving the brightness and the uniformity coefficient of light emitting module.
Because light has the character of ripple, therefore the light of launching from light source 112 can produce tangible wave interference phenomenon in light guide plate 114 bottom surfaces, as shown in Figure 2.So-called wave interference phenomenon is meant the light that penetrates from Different Light when same position meets, if these light have identical phase place, then light has the addition phenomenon and produces, and promptly this position can seem brighter; On the contrary, when same position met, if these light have opposite phases, then light had the offseting phenomenon generation, and promptly this position can present gloomy state.From Fig. 3, it is the partial enlarged drawing at A place among Fig. 2, and we can be clear that very that light guide plate 114 bottom surfaces have light and dark figure to produce.Similarly, when our use replaces cold cathode fluorescent lamp by the formed matrix of light emitting diode, also have the generation of optical interference phenomenon problem.
In addition, cold cathode fluorescent lamp is a line source, and light emitting diode is a pointolite, the light intensity that both launched all weakens along with the increase of distance, therefore there is maximum brightness (light intensity) at the position of optical plate directly over light source, the shortest because of its distance of advancing, the optical plate not position directly over light source then has less brightness (light intensity), because of its distance of advancing longer.This also causes light from light emitted when entering the optical plate bottom surface, the uneven problem of light intensity.
Summary of the invention
In above-mentioned background of invention, the large-scale LCD of the backlight module of existing straight-down negative lamp tube structure has the uneven problem of intensity when light enters the optical plate bottom surface.The invention provides a kind of backlight module of modified straight-down negative lamp tube structure, avoid said circumstances to produce.
Another object of the present invention is to provide a kind of backlight module of modified straight-down negative lamp tube structure, by the particular design of optical plate bottom surface, to solve the uneven problem of light intensity.
Another purpose of the present invention is to provide a kind of backlight module of modified straight-down negative lamp tube structure, by the particular design in optical plate front, to solve the uneven problem of light intensity.
According to above-described purpose, the invention provides a kind of backlight module of modified straight-down negative lamp tube structure, comprising: a light source; One reflector plate is positioned at this light source below, in order to light is reflected back, to improve this brightness of backlight module; An and light guide plate, be positioned at this light source top, wherein first position of this optical plate bottom surface directly over this light source is the plane, and there are not a plurality of optically focused projections (bump) this optical plate bottom surface in second position directly over this light source, increases the light intensity at this second position in order to collected light.
According to above-mentioned conception, this light source is made up of cold cathode fluorescent lamp (CCFL).
According to above-mentioned conception, this light source is made up of light emitting diode (LED).
According to above-mentioned conception, the material of this light guide plate be acryl (polymethylmethacrylate, PMMA).
According to above-mentioned conception, wherein the material of this light guide plate is optical plastic (Plastic Division).
According to above-mentioned conception, wherein this light guide plate also includes 50～80% titania (TiO
2) the diffusion grain.
According to above-mentioned conception, the backlight module of modified straight-down negative lamp tube structure also comprises a diffusion sheet that is positioned at this light guide plate top.
According to above-mentioned conception, the backlight module of modified straight-down negative lamp tube structure also comprises a rhombus lens that is positioned at this light guide plate top.
According to above-mentioned conception, wherein the plane at this first position of optical plate bottom surface is through cloudy surface or mirror process.
According to above-mentioned conception, wherein this mirror process is that mode with sputter or evaporation is with the plane of a metal-plated at this first position of optical plate bottom surface.
According to above-mentioned conception, wherein this metal is to select from following: aluminium and silver.
According to above-described purpose, the invention provides a kind of backlight module of modified straight-down negative lamp tube structure, comprising: a light source; One reflector plate is positioned at the below of this light source, in order to light is reflected back, to improve this brightness of backlight module; An and light guide plate, be positioned at this light source top, wherein first position of this optical plate front directly over this light source is the plane, and there are not a plurality of optically focused potholes (recess) in this optical plate front in second position directly over this light source, increases the light intensity at this second position in order to collected light.
According to above-mentioned conception, this light source is made up of cold cathode fluorescent lamp (CCFL).
According to above-mentioned conception, this light source is made up of light emitting diode (LED).
According to above-mentioned conception, the material of this light guide plate be acryl (polymethylmethacrylate, PMMA).
According to above-mentioned conception, wherein the material of this light guide plate is optical plastic (Plastic Division).
According to above-mentioned conception, wherein this light guide plate also includes 50～80% titania (TiO
2) the diffusion grain.
According to above-mentioned conception, the backlight module of modified straight-down negative lamp tube structure also comprises a diffusion sheet that is positioned at this light guide plate top.
According to above-mentioned conception, the backlight module of modified straight-down negative lamp tube structure also comprises a rhombus lens that is positioned at this light guide plate top.
According to above-mentioned conception, wherein the plane at this first position in optical plate front is through cloudy surface or mirror process.
According to above-mentioned conception, wherein this mirror process in the mode of sputter or evaporation with the plane of a metal-plated at this first position in optical plate front.
According to above-mentioned conception, wherein this metal is to select from following: aluminium and silver.
Description of drawings
Fig. 1 is the backlight module diagrammatic cross-section of a kind of existing application in the full run-down type lamp tube structure of large-scale LCD;
Fig. 2 is the backlight module schematic perspective view of a kind of existing application in the full run-down type lamp tube structure of large-scale LCD;
Fig. 3 is the enlarged drawing of a-quadrant among Fig. 2;
Fig. 4 is the diagrammatic cross-section of first preferred embodiment of the backlight module of the full run-down type lamp tube structure that is applied to large-scale LCD of the present invention;
Fig. 5 is the partial view of Fig. 4;
Fig. 6 is applied to the local amplification profile synoptic diagram of second preferred embodiment of backlight module of the full run-down type lamp tube structure of large-scale LCD for the present invention.
Embodiment
Some embodiments of the present invention can be described in detail as follows.Yet except describing in detail, the present invention can also be widely implements at other embodiment, and scope of the present invention do not limited, its with after claim be as the criterion.
Please refer to Fig. 4, be the cut-open view of the backlight module 10 of a kind of modified full run-down type of preferred embodiment of the present invention lamp tube structure.It comprises: a light source 12; One light guide plate 14; One reflector plate 16; One diffusion sheet 18; With a rhombus lens 20.Wherein light source 12 is made up of a row cold cathode fluorescent lamp (CCFL), but we also can use by the formed matrix of light emitting diode (LED) and replace aforesaid cold cathode fluorescent lamp (CCFL).Light guide plate 14, its material be generally acryl (polymethylmethacrylate, PMMA) or optical plastic (Plastic Division is commonly called as PC material or plastic rubber material), in comprising the titania (TiO that has 50～80%
2) diffusion grain 22, its role is to when penetrating and during towards light guide plate 14 surface ejaculations, running into titania (TiO from the light of light source 12 emissions
2) diffusion grain 22 can be by scattering more equably.Reflector plate 16 places light source 14 belows, reflects back towards light guide plate 4 once more in order to the light that will maybe be reflected downwards when entering light guide plate 14 from the light that light source 12 penetrates downwards, to improve the brightness of backlight module 10.Usually can add diffusion sheet 18 and rhombus lens 20 above light guide plate 14, both numbers are decided on the design of backlight module 10, and diffusion sheet 18 and rhombus lens 20 also are to be used for further improving the brightness and the uniformity coefficient of light emitting module.
First preferred embodiment of the present invention and existing difference are light guide plate 14 bottom surfaces are changed to by existing whole plane the design on part projection (bump) and part plane, to improve light when light source 12 ejaculations when entering optical plate 14 bottom surfaces, the uneven problem of light intensity.As shown in Figure 5, the position 24 of optical plate 14 of the present invention directly over light source 12 still keeps the plane, the light intensity that is this position remains unchanged, then there are a plurality of projections the optical plate 14 bottom surfaces not position directly over light source 12 26, increase the light intensity at this position in order to collected light, reach the uniformity coefficient of improving incident light guide plate bottom surface light by this mode, and then prevent that light and dark figure from producing.Position 24 except keeping the plane, we in addition cloudy surface or mirror process weaken or reflect the incident light intensity, further reach the uniformity coefficient of improving incident light guide plate bottom surface light.Wherein mirror process can be plated in metallics on the plane at position 24 by the mode of sputter or evaporation, and metallics can be aluminium or silver, and when in lower reflection demand, aluminium is good selection, and when higher reflection demand, we can use silver instead.
Please refer to Fig. 6, be another preferred embodiment of the present invention.The position 28 of optical plate of the present invention 14 fronts directly over light source 12 still keeps the plane, the light intensity that is this position remains unchanged, then there are a plurality of potholes (recess) in the optical plate 14 fronts not position directly over light source 12 30, increase the light intensity at this position in order to collected light, reach the uniformity coefficient of improving incident light guide plate bottom surface light by this mode, and then prevent that light and dark figure from producing.Position 28 except keeping the plane, we in addition cloudy surface or mirror process weaken or reflect the incident light intensity, further reach the uniformity coefficient of improving incident light guide plate bottom surface light.Wherein mirror process can be plated in metallics on the plane at position 28 by the mode of sputter or evaporation, and metallics can be aluminium or silver, and when in lower reflection demand, aluminium is good selection, and when higher reflection demand, we can use silver instead.
Even the present invention describes by enumerating several preferred embodiments, but the present invention is not limited to the embodiment that enumerated.Though the above-mentioned specific embodiment of enumerating and narrating, apparently, other does not break away under the disclosed spirit, and the equivalence of being finished changes or modifies, and all should be included in the claim of the present invention.In addition, all other do not break away under the disclosed spirit, and other that finished are similar and approximate to be changed or modification, also includes in claim of the present invention.Should explain scope of the present invention with the widest definition simultaneously, to comprise all modifications and similar structures.
Claims (16)
1. the backlight module of a modified straight-down negative lamp tube structure comprises:
One light source;
One reflector plate is positioned at this light source below, in order to light is reflected back, to improve this brightness of backlight module; And
One light guide plate, be positioned at this light source top, wherein first position of this optical plate bottom surface directly over this light source is the plane, and there are not a plurality of optically focused projections (bump) this optical plate bottom surface in second position directly over this light source, increases the light intensity at this second position in order to collected light.
2. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 1, wherein this light source is made up of cold cathode fluorescent lamp (CCFL) or light emitting diode (LED).
3. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 1, wherein the material of this light guide plate be acryl (polymethylmethacrylate, PMMA) or optical plastic (PlasticDivision).
4. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 1, wherein this light guide plate also includes 50～80% titania (TiO
2) the diffusion grain.
5. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 1 also comprises a diffusion sheet that is positioned at this light guide plate top.
6. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 1 also comprises a rhombus lens that is positioned at this light guide plate top.
7. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 1, wherein the plane at this first position is through cloudy surface or mirror process.
8. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 7, wherein this mirror process be mode with sputter or evaporation with the plane of a metal-plated at this first position, and this metal is to select from following: aluminium and silver.
9. the backlight module of a modified straight-down negative lamp tube structure comprises:
One light source;
One reflector plate is positioned at this light source below, in order to light is reflected back, to improve this brightness of backlight module; And
One light guide plate, be positioned at this light source top, wherein first position of this optical plate front directly over this light source is the plane, and there are not a plurality of optically focused potholes (recess) in this optical plate front in second position directly over this light source, increases the light intensity at this second position in order to collected light.
10. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 9, wherein this light source is made up of cold cathode fluorescent lamp (CCFL) or light emitting diode (LED).
11. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 9, wherein the material of this light guide plate be acryl (polymethylmethacrylate, PMMA) or optical plastic (PlasticDivision).
12. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 9, wherein this light guide plate also includes 50～80% titania (TiO
2) the diffusion grain.
13. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 9 also comprises a diffusion sheet that is positioned at this light guide plate top.
14. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 9 also comprises a rhombus lens that is positioned at this light guide plate top.
15. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 9, wherein the plane at this first position is through cloudy surface or mirror process.
16. the backlight module of modified straight-down negative lamp tube structure as claimed in claim 15, wherein this mirror process be mode with sputter or evaporation with the plane of a metal-plated at this first position, and this metal is to select from following: aluminium and silver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03106756 CN1280660C (en) | 2003-02-28 | 2003-02-28 | Improved type backlight module with straightly-down luminous tube structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03106756 CN1280660C (en) | 2003-02-28 | 2003-02-28 | Improved type backlight module with straightly-down luminous tube structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1525219A true CN1525219A (en) | 2004-09-01 |
| CN1280660C CN1280660C (en) | 2006-10-18 |
Family
ID=34282799
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03106756 Expired - Fee Related CN1280660C (en) | 2003-02-28 | 2003-02-28 | Improved type backlight module with straightly-down luminous tube structure |
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| Country | Link |
|---|---|
| CN (1) | CN1280660C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1828387B (en) * | 2005-03-05 | 2010-05-05 | 鸿富锦精密工业（深圳）有限公司 | Straight down type backlight module |
| CN103244864A (en) * | 2012-02-13 | 2013-08-14 | 鑫成科技(成都)有限公司 | Backlight module |
| CN103335246A (en) * | 2010-11-04 | 2013-10-02 | 友达光电股份有限公司 | Light source and backlight module with same |
| CN102141215B (en) * | 2010-01-28 | 2014-04-16 | 奇菱光电股份有限公司 | Light source device and backlight module with same |
| US9057806B2 (en) | 2010-11-04 | 2015-06-16 | Au Optronics Corporation | Light source and backlight module having the same |
| CN104714339A (en) * | 2015-04-01 | 2015-06-17 | 京东方科技集团股份有限公司 | Optical aligning device |
| CN108317477A (en) * | 2018-03-09 | 2018-07-24 | 苏州美瑞康医疗科技有限公司 | A kind of surface light source LED lamp light composite module |
| CN108680985A (en) * | 2018-05-22 | 2018-10-19 | 合肥诚辉电子有限公司 | A kind of automobile display screen light guide plate |
| CN109188772A (en) * | 2018-10-30 | 2019-01-11 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
| CN110456564A (en) * | 2019-07-30 | 2019-11-15 | 武汉华星光电技术有限公司 | Backlight module and display device |
-
2003
- 2003-02-28 CN CN 03106756 patent/CN1280660C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1828387B (en) * | 2005-03-05 | 2010-05-05 | 鸿富锦精密工业（深圳）有限公司 | Straight down type backlight module |
| CN102141215B (en) * | 2010-01-28 | 2014-04-16 | 奇菱光电股份有限公司 | Light source device and backlight module with same |
| CN103335246A (en) * | 2010-11-04 | 2013-10-02 | 友达光电股份有限公司 | Light source and backlight module with same |
| US9057806B2 (en) | 2010-11-04 | 2015-06-16 | Au Optronics Corporation | Light source and backlight module having the same |
| CN103335246B (en) * | 2010-11-04 | 2015-07-15 | 友达光电股份有限公司 | Light source and backlight module with same |
| CN103244864A (en) * | 2012-02-13 | 2013-08-14 | 鑫成科技(成都)有限公司 | Backlight module |
| CN104714339A (en) * | 2015-04-01 | 2015-06-17 | 京东方科技集团股份有限公司 | Optical aligning device |
| CN108317477A (en) * | 2018-03-09 | 2018-07-24 | 苏州美瑞康医疗科技有限公司 | A kind of surface light source LED lamp light composite module |
| CN108680985A (en) * | 2018-05-22 | 2018-10-19 | 合肥诚辉电子有限公司 | A kind of automobile display screen light guide plate |
| CN109188772A (en) * | 2018-10-30 | 2019-01-11 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
| CN110456564A (en) * | 2019-07-30 | 2019-11-15 | 武汉华星光电技术有限公司 | Backlight module and display device |
| US11169315B2 (en) | 2019-07-30 | 2021-11-09 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Backlight module and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1280660C (en) | 2006-10-18 |
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