CN100399149C - Illuminating device and plane light-source module - Google Patents
Illuminating device and plane light-source module Download PDFInfo
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- CN100399149C CN100399149C CNB2005101096676A CN200510109667A CN100399149C CN 100399149 C CN100399149 C CN 100399149C CN B2005101096676 A CNB2005101096676 A CN B2005101096676A CN 200510109667 A CN200510109667 A CN 200510109667A CN 100399149 C CN100399149 C CN 100399149C
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- light source
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Abstract
The invention discloses a luminescent device including the base plate, many light sources and the lens part. The light sources are arrayed on the base plate which is covered by the lens part. The lens part has a saddle type refracting surface on the top of the light source which has a saddle region and two ridge regions. The saddle region is between the ridge region and the light intensity of the ridge is bigger than the saddle region. In otherwise, the invention also discloses a surface light source module which can provide the good-uniformity surface light source. The light ray can be emit from the saddle type refracting surface directly, so it can't loss the energy and improves the luminous efficiency to increase the brightness of the surface light source.
Description
Technical field
The present invention relates to a kind of light-emitting device and modular surface light source, relate in particular to a kind of modular surface light source that goes out the different light-emitting device of light intensity and constituted of all directions.
Background technology
LCD mainly is made of liquid crystal panel and backlight module, and wherein, backlight module is in order to provide liquid crystal panel required area source, so that LCD reaches the effect of demonstration.In general, backlight module can be divided into straight-down negative (Direct-Type) and two kinds of marginal modes haply, and direct type backlight module is applied to the liquid crystal panel of large-size usually.
Figure 1A is the synoptic diagram of existing backlight modular structure, and Figure 1B is the sectional view of Figure 1A.Please refer to Figure 1A and Figure 1B, existing backlight module 100 is a direct type backlight module, and it comprises lamp box 110, a plurality of cathode fluorescent tube (Cold Cathode Fluorescence Lamp, CCFL) 120 and diffuser plate (Diffusion Plate) 130.Wherein, cathode fluorescent tube 120 is disposed in the lamp box 110, goes out optical cross-section 112 and diffuser plate 130 covers lamp boxes 110, is diffused as area source in order to the light 122 that cathode fluorescent tube 120 is sent.At this,, only show local diffusion plate 130 among Figure 1A in order to know the inside of Display Light Box 110.
In existing backlight module 100, because cathode fluorescent tube 120 emits beam toward all directions equably, the light intensity that therefore goes out on the optical cross-section 112 is everywhere decided on the distance of itself and cathode fluorescent tube 120.In other words, the light intensity above cathode fluorescent tube 120 will be greater than the light intensity at other place.So existing backlight module 100 must maintain the spacing between the cathode fluorescent tube 120 about 20mm～30mm, and can't change significantly for comparatively uniform surface light source is provided.
In addition, the light 122 that is incident upon lamp box 110 bottoms needs to pass through the reflection ability incident diffuser plate 130 of lamp box 110 bottoms, but light 122 will lose portion of energy in the process of reflection, thereby the luminescence efficiency of backlight module 100 is reduced.
On the other hand, with (the National Television SystemCommittee of NTSC, NTSC) standard of being formulated is weighed, and utilizes existing backlight module 100 that its color saturation of LCD at most only about about 75% of area source is provided.Moreover the color of cathode fluorescent tube 120 can't be proofreaied and correct, and along with the color and the brightness of the growth cathode fluorescent tube 120 of service time will be morphed, thereby influence the display quality of LCD.In addition, because of cathode fluorescent tube 120 contains mercury, cause environmental pollution easily.
Summary of the invention
In view of the above, the object of the present invention is to provide a kind of light-emitting device, it can provide different light intensities in different directions.
Another object of the present invention provides a kind of modular surface light source, and it can provide homogeneity preferable area source.
Based on described and other purpose, light-emitting device provided by the invention comprises substrate, a plurality of light source and lens section.Wherein, light source is arranged on the substrate, and lens section coats substrate.Lens section has the saddle type plane of refraction that is positioned at the light source top, and the saddle type plane of refraction has a saddle district and two ridge districts.The saddle district is positioned between the two ridge districts, and the ridge district go out the go out light intensity of light intensity greater than the saddle district.
In described light-emitting device, lens section for example can be the linearity lens section.
In described light-emitting device, each light source for example can be light-emitting diode chip for backlight unit (Light EmittingDiode Chip).
In described light-emitting device, for example light source can be arranged on the substrate with the form of the matrix of m * n again, and m, n are positive integer.In addition, the light source of even column for example can correspond respectively between light source adjacent in the odd column.
In described light-emitting device, substrate for example can be rectangle.
The present invention also provides a kind of modular surface light source, and it comprises lamp box and a plurality of described light-emitting device, and wherein, lamp box has the optical cross-section of going out, and light-emitting device is disposed at the lamp box bottom.
In this modular surface light source, the substrate of light-emitting device for example can be rectangle, and light-emitting device for example can be arranged in the lamp box bottom along the bearing of trend of rectangular substrate.
In described modular surface light source, the substrate of light-emitting device for example can be rectangle, and light-emitting device for example can be arranged side by side along the bearing of trend of rectangular substrate in the lamp box bottom.
Described modular surface light source for example also can comprise optical diaphragm group, and it covers the optical cross-section that of lamp box.Wherein, optical diaphragm group for example comprise diffuser plate, brightening piece and prismatic lens at least one of them.
In light-emitting device of the present invention, mainly go out the go out light intensity of light intensity greater than the saddle district by means of what the distinctive appearance of the saddle type plane of refraction of lens section made the ridge district, to overcome the brighter shortcoming of cathode fluorescent tube upper section in the existing area source, therefore modular surface light source of the present invention can provide the light intensity uniform surface light source.
Description of drawings
For described and other purpose, feature and advantage of the present invention can be become apparent, hereinafter in conjunction with the accompanying drawings preferred implementation is elaborated.In the accompanying drawing:
Figure 1A is the synoptic diagram of existing a kind of backlight modular structure;
Figure 1B is the sectional view of Figure 1A;
Fig. 2 A is the structural representation of the modular surface light source of the present invention's one preferred implementation;
Fig. 2 B is the sectional view of Fig. 2 A;
Fig. 3 A is the structural representation of the light-emitting device shown in Fig. 2 A;
Fig. 3 B is the sectional view of Fig. 3 A;
Fig. 4 A and Fig. 4 B are the structural representation of two kinds of light-emitting devices in addition of the present invention.
Description of reference numerals
100 backlight modules
110,210 lamp boxes
112,212 go out optical cross-section
120 cathode fluorescent tubes
122,225 light
130 diffuser plates
200 modular surface light sources
220 light-emitting devices
222 substrates
224 light sources
226 lens sections
227 bottom surfaces
228 saddle type planes of refraction
228a saddle district
228b ridge district
229 bright dipping light shapes
230 optical diaphragm group
250 line sources
Embodiment
Fig. 2 A is the structural representation of the modular surface light source of the present invention's one preferred implementation, and Fig. 2 B is the sectional view of Fig. 2 A.In addition, Fig. 3 A is the structural representation of light-emitting device among Fig. 2 A, and Fig. 3 B is the sectional view of Fig. 3 A.
Please refer to Fig. 2 A, Fig. 2 B, Fig. 3 A and Fig. 3 B, the modular surface light source 200 of present embodiment can be used in the device of requirement uniform area light source, as is applied in the LCD, to provide display panels required area source.Modular surface light source 200 comprises lamp box 210 and a plurality of light-emitting devices 220, and wherein, lamp box 210 has the optical cross-section of going out 212, and light-emitting device 220 is arranged in the bottom of lamp box 210.In addition, each light-emitting device 220 comprises substrate 222, a plurality of light source 224 and lens section 226.Wherein, light source 224 is arranged on the substrate 222, and lens section 226 coats substrate 222.Lens section 226 has the saddle type plane of refraction 228 that is positioned at light source 224 tops, and saddle type plane of refraction 228 has a saddle district 228a and two ridge district 228b.Saddle district 228a between two ridge district 228b, and ridge district 228b go out the go out light intensity of light intensity greater than saddle district 228a.
In modular surface light source 200, the substrate 222 of light-emitting device 220 for example can be a rectangular substrate, and light-emitting device 220 can be arranged side by side in the bottom of lamp box 210 along the bearing of trend (being the Y direction) of rectangular substrate, form a plurality of line sources 250 with the bottom in lamp box 210, these line sources 250 can replace cathode fluorescent tube of the prior art.In addition, each light source 224 of light-emitting device 220 for example can be a light-emitting diode chip for backlight unit, for example can it be arranged side by side on substrate 222 along the Y direction.In addition, lens section 226 can be linearity (being the Y direction) lens section, to simplify its mould and manufacture process.
In the present embodiment, the light 225 that each light source 224 is sent is via the bottom surface 227 incident lens sections 220 of lens section 226, and from saddle type plane of refraction 228 outgoing of lens section 220.Wherein, saddle type plane of refraction 228 is in order to refracted ray 225, to change the bang path of light 225.Because the light 225 after the ridge district of saddle type plane of refraction 228 228b refraction can be assembled, and the light 225 after the saddle district of saddle type plane of refraction 228 228a refraction can be dispersed toward both sides, can make therefore that ridge district 228b's go out the go out light intensity of light intensity greater than saddle district 228a.
In the present embodiment, because ridge district 228b goes out the go out light intensity of light intensity greater than saddle district 228a, make that it is more consistent with the brightness of remainder to be positioned at the brightness partly of line source 250 tops in the area source that modular surface light source 200 provided, so can improve the homogeneity of area source.In addition, because of light 225 need can be directly from 228 outgoing of saddle type plane of refraction through reflection, thus can be because of the reflection off-energy, then can improve the luminescence efficiency of light-emitting device 220, and then increase the brightness of area source.
In order further to improve the homogeneity of the area source that modular surface light source 200 provided, can be in lamp box 210 tops configuration optical diaphragm group 230, what this diaphragm group covered lamp box 210 goes out optical cross-section 212.Wherein, optical diaphragm group 230 one of for example comprises in diffuser plate, brightening piece and the prismatic lens at least.In addition, in order to know Display Light Box 210 inside, only show indicative of local optical diaphragm group 230 in Fig. 2 A, what in fact optical diaphragm group 230 covered whole lamp box 210 goes out optical cross-section 212.
In the light-emitting device 220 of present embodiment, since as the light-emitting diode chip for backlight unit of light source 224 with arrayed, and the spacing between the light-emitting diode chip for backlight unit is less, therefore can effectively eliminate the light-emitting diode chip for backlight unit error in classification, and can increase the mixed light effect of light-emitting diode chip for backlight unit.In addition, can avoid not only as light source with light-emitting diode chip for backlight unit that the mercury in the cold-cathode fluorescence lamp causes environmental pollution problems easily in the prior art, also can improve the color representation of LCD, make color saturation reach about 100% of NTSC standard.
What deserves to be mentioned is, can adjust the bright dipping light shape 229 of light-emitting device 220 in the present embodiment by means of the profile of the saddle type plane of refraction 228 that changes lens section 226.Thus, can under the inhomogeneity prerequisite of influence surface light source not, adjust the spacing of the line source 250 of lamp box 210 bottoms.Therefore, present embodiment can be under the inhomogeneity situation of influence surface light source not, looks demand and adjusts the quantity of the line source 250 in the modular surface light source 200, to change the brightness of area source.
Fig. 4 A and Fig. 4 B are the structural representation of other two kinds of light-emitting devices.Please earlier with reference to Fig. 4 A, in the present embodiment, the light source 224 of light-emitting device 220 also can be arranged on the substrate 222 along the Y direction is single except can being arranged side by side on substrate 222 along the Y direction.In addition, in another embodiment shown in Fig. 4 B, each light source 224 of light-emitting device 220 for example is aligned to the matrix of m * n on substrate 222, and m, n are positive integer.For example, light source 224 for example is to be arranged in 10 * 3 matrix on substrate 222, and the light source 224 of even column (as secondary series) corresponds respectively to 224 of light sources adjacent in the odd column (as first and third row).Certainly, the present invention for the arrangement mode of light source 224 on substrate 222 without limits.
In sum, modular surface light source of the present invention and light-emitting device have the following advantages at least.
1. in light-emitting device, because the distinctive appearance of the saddle type plane of refraction of lens section, what make the ridge district goes out the go out light intensity of light intensity greater than the saddle district, can overcome in the prior art area source in the brighter shortcoming of cathode fluorescent tube upper section, therefore modular surface light source of the present invention can provide homogeneity preferable area source.
2. the present invention can adjust the bright dipping light shape of light-emitting device by means of the profile of the plane of refraction that changes lens section, so that under the inhomogeneity situation of influence surface light source not, adjusts the spacing of line source.Therefore, the visual demand of the present invention and adjust the quantity of line source in the modular surface light source is to change the brightness of area source.
3. can be because of light directly from the outgoing of saddle type plane of refraction, can be because of the reflection off-energy, thus can improve the luminescence efficiency of light-emitting device, and then increase the brightness of area source.
Though the present invention discloses as above with preferred implementation; but it is not with being limitation of the present invention; the any technician in this area is under the prerequisite that does not exceed design of the present invention and scope; can make many changes and retouching, so the scope that protection scope of the present invention should define with appended claim is as the criterion.
Claims (16)
1. light-emitting device comprises:
Substrate;
Be arranged in a plurality of light sources on the described substrate; And
Coat the lens section of described substrate, this lens section has the saddle type plane of refraction that is positioned at described light source top, this saddle type plane of refraction has a saddle district and two ridge districts, wherein, described saddle district is positioned between the described ridge district and is positioned at directly over the described light source, and described ridge district goes out the go out light intensity of light intensity greater than described saddle district.
2. light-emitting device as claimed in claim 1, wherein, described lens section is the linearity lens section.
3. light-emitting device as claimed in claim 1, wherein, each described light source comprises light-emitting diode chip for backlight unit.
4. light-emitting device as claimed in claim 1, wherein, described light source is aligned to the matrix of m * n on described substrate, and m, n are positive integer.
5. light-emitting device as claimed in claim 4, wherein, the even column of described light source corresponds respectively between described light source adjacent in the odd column.
6. light-emitting device as claimed in claim 1, wherein, described substrate is a rectangle.
7. modular surface light source comprises:
Has the lamp box of optical cross-section;
Be disposed at a plurality of light-emitting devices of described lamp box bottom, wherein, each described light-emitting device comprises:
Substrate;
Be arranged in a plurality of light sources on the described substrate; And
Coat the lens section of described substrate, this lens section has the saddle type plane of refraction that is positioned at described light source top, this saddle type plane of refraction has a saddle district and two ridge districts, described saddle district is positioned between the described ridge district and is positioned at directly over the described light source, and described ridge district goes out the go out light intensity of light intensity greater than described saddle district.
8. modular surface light source as claimed in claim 7, wherein, described lens section is the linearity lens section.
9. modular surface light source as claimed in claim 7, wherein, described substrate is a rectangle.
10. modular surface light source as claimed in claim 9, wherein, described light-emitting device is arranged in described lamp box bottom along the bearing of trend of described rectangular substrate.
11. modular surface light source as claimed in claim 9, wherein, described light-emitting device is arranged side by side in described lamp box bottom along the bearing of trend of described rectangular substrate.
12. modular surface light source as claimed in claim 7, wherein, each described light source comprises light-emitting diode chip for backlight unit.
13. modular surface light source as claimed in claim 7, wherein, described light source is aligned to the matrix of m * n on described substrate, and m, n are positive integer.
14. modular surface light source as claimed in claim 13, wherein, the even column of described light source corresponds respectively between described light source adjacent in the odd column.
15. modular surface light source as claimed in claim 7 wherein, also comprises the described optical diaphragm group that goes out optical cross-section that covers described lamp box.
16. modular surface light source as claimed in claim 15, wherein, described optical diaphragm group comprise diffuser plate, brightening piece and prismatic lens at least one of them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101096676A CN100399149C (en) | 2005-09-19 | 2005-09-19 | Illuminating device and plane light-source module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101096676A CN100399149C (en) | 2005-09-19 | 2005-09-19 | Illuminating device and plane light-source module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1936669A CN1936669A (en) | 2007-03-28 |
| CN100399149C true CN100399149C (en) | 2008-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101096676A Expired - Fee Related CN100399149C (en) | 2005-09-19 | 2005-09-19 | Illuminating device and plane light-source module |
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| CN (1) | CN100399149C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102893075A (en) * | 2011-01-25 | 2013-01-23 | 松下电器产业株式会社 | Backlight device and liquid crystal display device |
| CN102645717A (en) * | 2011-02-17 | 2012-08-22 | 一诠精密工业股份有限公司 | Method for fixing optical lens by ultraviolet (UV) adhesive |
| JP5449274B2 (en) * | 2011-03-25 | 2014-03-19 | シャープ株式会社 | Lighting device and display device |
| CN106842708A (en) * | 2017-03-14 | 2017-06-13 | 宜昌景晟科技有限公司 | One kind is applied to down straight aphototropism mode set quantum dot pipe backlight assembly |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6679621B2 (en) * | 2002-06-24 | 2004-01-20 | Lumileds Lighting U.S., Llc | Side emitting LED and lens |
| CN2665747Y (en) * | 2003-06-30 | 2004-12-22 | 财团法人工业技术研究院 | Area source modulation device and module for high visible LED |
| CN1604346A (en) * | 2004-09-17 | 2005-04-06 | 清华大学 | Novel alignment light emitting diode packaging construction |
| CN1645217A (en) * | 2005-02-08 | 2005-07-27 | 友达光电股份有限公司 | Disk lens and dot light source of back light assembly |
-
2005
- 2005-09-19 CN CNB2005101096676A patent/CN100399149C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6679621B2 (en) * | 2002-06-24 | 2004-01-20 | Lumileds Lighting U.S., Llc | Side emitting LED and lens |
| CN2665747Y (en) * | 2003-06-30 | 2004-12-22 | 财团法人工业技术研究院 | Area source modulation device and module for high visible LED |
| CN1604346A (en) * | 2004-09-17 | 2005-04-06 | 清华大学 | Novel alignment light emitting diode packaging construction |
| CN1645217A (en) * | 2005-02-08 | 2005-07-27 | 友达光电股份有限公司 | Disk lens and dot light source of back light assembly |
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| Publication number | Publication date |
|---|---|
| CN1936669A (en) | 2007-03-28 |
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Granted publication date: 20080702 Termination date: 20120919 |