CN100529910C - Light-emitting diode backlight module - Google Patents
Light-emitting diode backlight module Download PDFInfo
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- CN100529910C CN100529910C CNB2006101270111A CN200610127011A CN100529910C CN 100529910 C CN100529910 C CN 100529910C CN B2006101270111 A CNB2006101270111 A CN B2006101270111A CN 200610127011 A CN200610127011 A CN 200610127011A CN 100529910 C CN100529910 C CN 100529910C
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- light
- diffusion sheet
- emitting diode
- backlight module
- led
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- 238000009792 diffusion process Methods 0.000 claims abstract description 51
- 238000004806 packaging method and process Methods 0.000 claims abstract description 25
- 238000009826 distribution Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a light-emitting diode backlight module, which is provided with a module base; the diode array formed by a plurality of red light, blue light and green light diode packaging bodies is fixed on the module base; a light mixing cavity is covered on the module base, and the diode array is sealed in the light mixing cavity. The first diffusion sheet is fixed in the light mixing cavity and parallel to the module base, and light emitted by the diode array is more uniform after passing through the first diffusion sheet. The second diffusion sheet is fixed in the light mixing cavity and is parallel to the first diffusion sheet, and light which has passed through the first diffusion sheet is more uniform after passing through the second diffusion sheet. At least one of the first diffusion sheet and the second diffusion sheet comprises a plurality of arc-shaped recesses positioned on the flat surface.
Description
Technical field
The present invention relates to a kind of backlight module, relating in particular to a kind of is the backlight module of light source with the light emitting diode.
Background technology
LCD Panel is widely used on the products such as mobile phone, PDA(Personal Digital Assistant), desktop PC screen, TV.Tradition LCD screen system uses cold-cathode tube as light source, and using light emitting diode in recent years then is the selection of another kind of backlight.
Use light emitting diode several different designs to be arranged in the prior art as backlight, wherein a kind ofly come excitated fluorescent powder to produce gold-tinted with the blue light that blue chip was sent to constitute white light for using, the major defect of this mode is that the degree of containing of colour gamut is wide inadequately, thereby causes color saturation not enough.In order to make LCD Panel present higher color saturation, a kind of high color saturation or full-color backlight are the demands of various high-quality electronic goods screens.
Except high color saturation, the homogeneity of back light source brightness also is very important characteristic.Because light emitting diode has the directive property emitting characteristics, therefore periodically uneven problem of brightness is arranged easily when constituting whole backlight module.So light intensity distributions evenly is another place that can improve.
Summary of the invention
Therefore, technical matters to be solved by this invention is to provide a kind of light-emitting diode (LED) backlight module, in order to present higher color saturation and more uniform light intensity distributions.
According to above-mentioned and other purpose of the present invention, a kind of light-emitting diode (LED) backlight module is proposed.This backlight module has a module base.The diode array that a plurality of ruddiness, blue light and green diode packaging body are formed is fixed on the module base.One mixed light cavity covers on the module base, and diode array is sealed in it.First diffusion sheet is fixed in the mixed light cavity, and is parallel to the module base, and the light that diode array sent passes through behind first diffusion sheet more even.Second diffusion sheet is fixed in the mixed light cavity, and is parallel to first diffusion sheet, and the light that has passed through this first diffusion sheet passes through behind second diffusion sheet more even.One of them comprises a plurality of arc-shaped recess and is positioned at its flat surfaces at least for above-mentioned first diffusion sheet and second diffusion sheet.A plurality of arc-shaped recess can be formed at a wherein tabular surface or two tabular surfaces of diffusion sheet.The user also can design a plurality of arc-shaped recess in first diffusion sheet and second diffusion sheet on demand simultaneously, perhaps designs in first diffusion sheet or second diffusion sheet.
From the above, use light-emitting diode (LED) backlight module of the present invention, the packaging body that uses ruddiness, blue light and green diode packaging body or comprise three kinds or the three kinds above light emitting diodes of color is as light source, use diffusion sheet simultaneously, make backlight module integral body present higher color saturation and more uniform light intensity distributions with a plurality of arc-shaped recess.
Description of drawings
For above and other objects of the present invention, feature, advantage and embodiment can be become apparent, appended graphic being described in detail as follows:
Fig. 1 is the synoptic diagram according to a kind of light-emitting diode (LED) backlight module of a preferred embodiment of the present invention;
Fig. 2 is the synoptic diagram according to a kind of light-emitting diode (LED) backlight module of another preferred embodiment of the present invention; And
Fig. 3 A and Fig. 3 B are respectively the detail structure enlarged drawing according to two kinds of backlight module diffusion sheets of a preferred embodiment of the present invention.
Wherein, Reference numeral:
10: mixed light cavity 53: the green diode packaging body
20: diffusion sheet 60: lens
30: diffusion sheet 70: diapire
40: module base 72: sidewall
50: LED encapsulation body 80: arc-shaped recess
51: red diodes packaging body 82: arc-shaped recess
52: the blue light diode packaging body
Embodiment
As mentioned above, the invention provides a kind of is the backlight module of light source with the light emitting diode, as the backlight of LCD screen, can present higher color saturation and more uniform light intensity distributions.Below will cooperate preferred embodiment to describe the backlight module of this light emitting diode in detail.
With reference to Fig. 1, it is the synoptic diagram according to a kind of light-emitting diode (LED) backlight module of a preferred embodiment of the present invention.The array that the packaging body of a plurality of red diodes packaging bodies 51, blue light diode packaging body 52 and green diode packaging body 53 is formed is fixed in module base 40 through surface adhering or welding manner.The emission wavelength scope of above-mentioned red diodes packaging body 51 is 580mm～640mm, and the emission wavelength scope of blue light diode packaging body 52 is 430mm～480mm, and the emission wavelength scope of green diode packaging body 53 is 500mm～560mm.Mixed light cavity 10 covers module base 40 by the top, and the array that red diodes packaging body 51 and blue light diode packaging body 52 and green diode packaging body 53 are formed is sealed in it.Because LCD screen needs uniform backlight, so diffusion sheet 20 and diffusion sheet 30 need be arranged in the mixed light cavity 10.Diffusion sheet 20 is fixed in position lower in the mixed light cavity 10 position of module base 40 (comparatively near), and is parallel to module base 40, and the light that ruddiness, blue light and green diode are sent passes through behind the diffusion sheet 20 more even.Diffusion sheet 30 is fixed in positions higher in the mixed light cavity 10 position of module base 40 (away from), and is parallel to diffusion sheet 20, will be more even after the light that has passed through diffusion sheet 20 passes through diffusion sheet 30.For the light that red diodes 51, blue light diode 52 and green diode 53 are sent can more efficiently be utilized, the sidewall 72 of mixed light cavity 20 and the diapire 70 of module base 40 be the reflectivity high surfaces preferably, and for example the surface by plating metal level or tool high reflectance characteristic is to increase reflectivity.
With reference to Fig. 2, it is the synoptic diagram according to a kind of light-emitting diode (LED) backlight module of another preferred embodiment of the present invention.The preferred embodiment difference of this preferred embodiment and Fig. 1 only is that LED encapsulation body 50 is a kind of packaging bodies that comprise three kinds or the three kinds above light emitting diodes of color.Remaining structure is all identical with the preferred embodiment of Fig. 1.
With reference to 3A and 3B figure, it is respectively two kinds of backlight module diffusion sheet structure enlarged drawings according to a preferred embodiment of the present invention.For the light intensity distributions of the backlight module that makes above-mentioned Fig. 1 and Fig. 2 is more even, two kinds of diffusion sheets structures have been designed.In Fig. 3 A, a plurality of arc-shaped recess 80 are formed on diffusion sheet 20 or the 30 smooth sides to light; In Fig. 3 B, a plurality of arc-shaped recess 82 are formed on diffusion sheet 20 or the 30 smooth shady faces.In other words, a plurality of arc-shaped recess can be formed at a wherein tabular surface or two tabular surfaces of diffusion sheet.Certainly, the user also can design a plurality of arc-shaped recess in diffusion sheet 20 and 30 on demand simultaneously, perhaps designs in diffusion sheet 20 or 30.The optical axis of the lens 60 of a plurality of arc-shaped recess 80 or 82 axle center and LED encapsulation body can be aligned to preferable, but is not limited thereto.The light that light emitting diode sent can diffuse to wider scope after passing through arc-shaped recess 80 or 82, makes the light intensity distributions of whole backlight module more even.
By the invention described above preferred embodiment as can be known, use light-emitting diode (LED) backlight module of the present invention, the packaging body that uses ruddiness, blue light and green diode packaging body or comprise three kinds or the three kinds above light emitting diodes of color is as light source, use diffusion sheet simultaneously, make backlight module integral body present higher color saturation and more uniform light intensity distributions with a plurality of arc-shaped recess.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; being familiar with those of ordinary skill in the art ought can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (11)
1. a light-emitting diode (LED) backlight module is characterized in that, comprises at least:
One module base;
One first diffusion sheet and one second diffusion sheet are parallel to this module base, and this first diffusion sheet and this second diffusion sheet and this module base constitute a mixed light cavity;
One diode array is arranged in this mixed light cavity and is fixed on this module base, and this diode array is made up of a plurality of light emitting diode and in order to launch a light beam;
Wherein one of them comprises a plurality of arc-shaped recess and is positioned at its flat surfaces at least for this first diffusion sheet and this second diffusion sheet, and these a plurality of arc-shaped recess are corresponding to these a plurality of light emitting diode settings, so that the light that this light emitting diode sent sees through respectively this arc-shaped recess evenly mixing in this mixed light cavity.
2. light-emitting diode (LED) backlight module according to claim 1 is characterized in that, one of them flat surfaces of this first diffusion sheet has a plurality of arc-shaped recess.
3. light-emitting diode (LED) backlight module according to claim 1 is characterized in that, two flat surfaces of this first diffusion sheet have a plurality of arc-shaped recess.
4. light-emitting diode (LED) backlight module according to claim 1 is characterized in that, one of them flat surfaces of this second diffusion sheet has a plurality of arc-shaped recess.
5. light-emitting diode (LED) backlight module according to claim 1 is characterized in that, two flat surfaces of this second diffusion sheet have a plurality of arc-shaped recess.
6. light-emitting diode (LED) backlight module according to claim 1 is characterized in that, this mixed light cavity also comprises reflective sidewall, and this module base also comprises reflective diapire.
7. light-emitting diode (LED) backlight module according to claim 1 is characterized in that, the emission wavelength scope of this blue light diode packaging body is 430mm～480mm.
8. light-emitting diode (LED) backlight module according to claim 1 is characterized in that, the emission wavelength scope of this green diode packaging body is 500mm～560mm.
9. light-emitting diode (LED) backlight module according to claim 1 is characterized in that, the emission wavelength scope of this red diodes packaging body is 580mm～640mm.
10. light-emitting diode (LED) backlight module according to claim 1 is characterized in that, this diode array is a plurality of packaging bodies that comprise three kinds or the three kinds above light emitting diodes of color.
11. light-emitting diode (LED) backlight module according to claim 1 is characterized in that, this diode array is a plurality of ruddiness, blue light and green diode packaging body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101270111A CN100529910C (en) | 2006-09-19 | 2006-09-19 | Light-emitting diode backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101270111A CN100529910C (en) | 2006-09-19 | 2006-09-19 | Light-emitting diode backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101149514A CN101149514A (en) | 2008-03-26 |
| CN100529910C true CN100529910C (en) | 2009-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101270111A Expired - Fee Related CN100529910C (en) | 2006-09-19 | 2006-09-19 | Light-emitting diode backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100529910C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022628B (en) * | 2009-09-21 | 2012-07-18 | 高基贸易股份有限公司 | LED lighting device |
| CN102064247A (en) * | 2010-11-29 | 2011-05-18 | 苏州纳晶光电有限公司 | Packaging method and packaging structure for embedded light emitting diode |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5684354A (en) * | 1993-10-05 | 1997-11-04 | Tir Technologies, Inc. | Backlighting apparatus for uniformly illuminating a display panel |
| CN1542517A (en) * | 2003-11-05 | 2004-11-03 | 友达光电股份有限公司 | Direct Type Backlight Assembly |
| WO2006068141A1 (en) * | 2004-12-24 | 2006-06-29 | Kabushiki Kaisha Toshiba | White led, backlight using same and liquid crystal display |
-
2006
- 2006-09-19 CN CNB2006101270111A patent/CN100529910C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5684354A (en) * | 1993-10-05 | 1997-11-04 | Tir Technologies, Inc. | Backlighting apparatus for uniformly illuminating a display panel |
| CN1542517A (en) * | 2003-11-05 | 2004-11-03 | 友达光电股份有限公司 | Direct Type Backlight Assembly |
| WO2006068141A1 (en) * | 2004-12-24 | 2006-06-29 | Kabushiki Kaisha Toshiba | White led, backlight using same and liquid crystal display |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101149514A (en) | 2008-03-26 |
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