CN201689890U - Tandem type light emitting diode having feedback function - Google Patents
Tandem type light emitting diode having feedback function Download PDFInfo
- Publication number
- CN201689890U CN201689890U CN2010201680654U CN201020168065U CN201689890U CN 201689890 U CN201689890 U CN 201689890U CN 2010201680654 U CN2010201680654 U CN 2010201680654U CN 201020168065 U CN201020168065 U CN 201020168065U CN 201689890 U CN201689890 U CN 201689890U
- Authority
- CN
- China
- Prior art keywords
- electrode
- led chip
- emitting diode
- layer
- feedback function
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000758 substrate Substances 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 230000004888 barrier function Effects 0.000 claims description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical class [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 229910052594 sapphire Inorganic materials 0.000 claims description 4
- 239000010980 sapphire Substances 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- 239000010931 gold Substances 0.000 description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
Images
Abstract
Provided is a tandem type light emitting diode having a feedback function, two or more LED chips are arranged on a substrate by interval in an epitaxial manner, each LED chip is composed of a N-type electrode contact, a light-emitting layer, a P-type electrode contact and a transparent conductive layer, an insulated layer is arranged two neighboring LED chips, and the LED chips are connected in series through metal leads; the conductive layer of the LED chip which is close to an electric input end is connected with a first P electrode; the conductive layer of the LED chip which is close to an electric output end is connected with a second P electrode, the N-type electrode contact of the LED chip close to the electric output end is connected with a N electrode, and a current feedback unit is connected between the second P electrode and the N electrode; in a process of preparing the light emitting diode, the LED chips are connected in series through leads, the LED chip close to the output end is provided with the first P electrode and the N electrode for connecting the current feedback unit, such that the light emitting diode has the feedback function and is operated under a stable current so as to improve operation stability.
Description
[technical field]
The utility model relates to light-emitting diode chip for backlight unit, particularly a kind of tandem light-emitting diode with feedback function.
[background technology]
Light-emitting diode (english abbreviation is LED) is a kind of light emitting semiconductor device that utilizes semi-conductive P-N junction electroluminescence principle to make, make the LED large-scale application in public places such as road lightings, the luminous flux of led light source must reach several thousand even lumen up to ten thousand, and so high light output variable can't realize by single chips; For satisfying so high light output requirement, adopt many led chips of making to connect at present both at home and abroad mostly and satisfy the requirement of highlight illumination by follow-up lead-in wire, this mode has solved the problem of single light-source brightness deficiency to a certain extent; But because the lead-in wire series connection between led chip preparation and the led chip is two independent step, there is not high, big, the shortcoming such as production efficiency is low that takes up room of complex manufacturing process, reliability, limited application and the popularization of led chip to a certain extent in field of semiconductor illumination.
Chinese invention patent application (publication number is CN101276832) is disclosed a kind of by zinc oxide transparent electrode LED chip with micro space connected in series and manufacturing process thereof, it comprises N type gold PAD, transparent current extending, obturator, substrate, P type gold PAD, P type current extending, the contact of P type electrode, luminescent layer, the contact of N type electrode, connects P electrode metal guide pillar, isolating trenches, auxiliary current extension layer, N type gold PAD; Be not used to connect feedback unit but reserve derivable electrode with the light-emitting diode chip for backlight unit that this technology is made, do not possess feedback function, therefore this light-emitting diode chip for backlight unit job stability is relatively poor.
[utility model content]
For solving the existing problem of above-mentioned light-emitting diode chip for backlight unit, the utility model is intended to propose a kind of tandem light-emitting diode with feedback function.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of tandem light-emitting diode with feedback function, in extension interval growth on the substrate the led chip that is made of the contact of N type electrode, luminescent layer, the contact of P type electrode and transparency conducting layer lamination more than two or two is arranged, be provided with insulating barrier between each led chip, by metal lead wire series LED chip; It is characterized in that: on the conductive layer of the led chip at electrical input place, be connected with a P electrode; Be connected with the 2nd P electrode on the conductive layer of the led chip of electricity output, be connected with the N electrode in the N type electrode contact of the led chip of electric output, connect a current feedback unit between the 2nd P electrode and the N electrode.
Substrate of the present utility model is Sapphire Substrate or silicon carbide substrates, and the preferred Sapphire Substrate of substrate of the present utility model is as chip substrate.
Transparency conducting layer of the present utility model is the ITO transparency conducting layer.
Insulating barrier of the present utility model is SiO
2Layer or Ti
2O
3Layer or Ti
3O
5Layer, the preferred SiO of insulating barrier of the present utility model
2As electric insulation layer.
Metal lead wire of the present utility model is selected Cr line, Au line, Ni line, Ti line or Pt line for use, the preferred Au line of metal lead wire of the present utility model.
The beneficial effects of the utility model are: adopt the led chip on the lead-in wire series connection substrate in the light-emitting diode preparation process, on the output led chip, reserve two electric connection points of a P electrode and N electrode and be connected the current feedback unit, make the utility model possess feedback function, be allowed to condition under the condition of current stabilization and work, improve the stability of its work.
[description of drawings]
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 connects the equivalent circuit diagram of feedback unit for the utility model;
Among the figure: 1. substrate; 2.LED chip; A 31. P electrode; 32. the 2nd P electrode; 4.N electrode; 5. go between; 6. insulating barrier; 7. conductive layer; 8. electrical nodes one; 9. electrical nodes two; 10. electrical nodes three; 11. feedback unit.
[embodiment]
Below in conjunction with drawings and Examples the utility model is further specified.
As Fig. 1, Fig. 2 and a kind of tandem light-emitting diode shown in Figure 3 with feedback function, the extension interval growth has six led chips 2 that are made of the contact of N type electrode, luminescent layer, the contact of P type electrode and ITO transparency conducting layer 7 laminations on Sapphire Substrate 1, is provided with SiO between each led chip 2
2Insulating barrier 6, by the Au line as metal lead wire 5 series LED chips 2; As shown in Figures 2 and 3, on the conductive layer 7 of the led chip 2 at electrical input place, be connected with a P electrode 31 as the exposed electrical nodes of reserving 1; Be connected with the 2nd P electrode 32 on the conductive layer 7 of the led chip 2 of electricity output as the exposed electrical nodes of reserving 29, be connected with N electrode 4 as the exposed electrical nodes of reserving 3 10 in the N type electrode contact of the led chip 2 of electricity output, connect a current feedback unit 11 between the 2nd P electrode 32 and the N electrode 4, promptly be connected current feedback unit 11 with electrical nodes 3 10 at electrical nodes 29, when electrical nodes 1 and electrical nodes 3 10 energisings, 11 electric current feedback effects of feedback unit, make operating current of the present utility model be in the current stabilization state, improve the reliability and the useful life of its work.
Above embodiment is only for the usefulness that the utility model is described; but not to restriction of the present utility model; those skilled in the art; under the situation that does not break away from spiritual main idea of the present utility model and scope; the technical scheme of having done various equivalents or variation should belong to protection category of the present utility model, is limited by every claim.
Claims (5)
1. tandem light-emitting diode with feedback function, in extension interval growth on the substrate the led chip that is made of the contact of N type electrode, luminescent layer, the contact of P type electrode and transparency conducting layer lamination more than two or two is arranged, be provided with insulating barrier between each led chip, by metal lead wire series LED chip; It is characterized in that: on the conductive layer of the led chip at electrical input place, be connected with a P electrode; Be connected with the 2nd P electrode on the conductive layer of the led chip of electricity output, be connected with the N electrode in the N type electrode contact of the led chip of electric output, connect a current feedback unit between the 2nd P electrode and the N electrode.
2. a kind of tandem light-emitting diode with feedback function as claimed in claim 1, it is characterized in that: described substrate is Sapphire Substrate or silicon carbide substrates.
3. a kind of tandem light-emitting diode with feedback function as claimed in claim 1, it is characterized in that: described transparency conducting layer is the ITO transparency conducting layer.
4. a kind of tandem light-emitting diode with feedback function as claimed in claim 1, it is characterized in that: described insulating barrier is SiO
2Layer or Ti
2O
3Layer or Ti
3O
5Layer.
5. a kind of tandem light-emitting diode with feedback function as claimed in claim 1, it is characterized in that: described metal lead wire is selected Cr line, Au line, Ni line, Ti line or Pt line for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201680654U CN201689890U (en) | 2010-04-16 | 2010-04-16 | Tandem type light emitting diode having feedback function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201680654U CN201689890U (en) | 2010-04-16 | 2010-04-16 | Tandem type light emitting diode having feedback function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201689890U true CN201689890U (en) | 2010-12-29 |
Family
ID=43378168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201680654U Expired - Lifetime CN201689890U (en) | 2010-04-16 | 2010-04-16 | Tandem type light emitting diode having feedback function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201689890U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106465492A (en) * | 2014-06-20 | 2017-02-22 | 格罗特工业有限公司 | Egress and/or flicker-free lighting device with persistent luminescence |
| CN113066920A (en) * | 2021-03-15 | 2021-07-02 | Tcl华星光电技术有限公司 | LED chip, driving substrate and display panel |
-
2010
- 2010-04-16 CN CN2010201680654U patent/CN201689890U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106465492A (en) * | 2014-06-20 | 2017-02-22 | 格罗特工业有限公司 | Egress and/or flicker-free lighting device with persistent luminescence |
| CN106465492B (en) * | 2014-06-20 | 2019-02-22 | 格罗特工业有限公司 | Evacuation and/or flicker free illuminating device with continuous illumination |
| CN113066920A (en) * | 2021-03-15 | 2021-07-02 | Tcl华星光电技术有限公司 | LED chip, driving substrate and display panel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101229 |