CN109511194A - A kind of LED charactrons esd protection circuit - Google Patents
A kind of LED charactrons esd protection circuit Download PDFInfo
- Publication number
- CN109511194A CN109511194A CN201810561243.0A CN201810561243A CN109511194A CN 109511194 A CN109511194 A CN 109511194A CN 201810561243 A CN201810561243 A CN 201810561243A CN 109511194 A CN109511194 A CN 109511194A
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- led charactrons
- zener diode
- charactron
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- 230000003068 static effect Effects 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 description 4
- 239000011324 bead Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The invention discloses a kind of LED charactrons esd protection circuits; including forming every a line by connection by LED charactrons, each column have the array of several LED charactrons; several Zener diodes of the input terminal reverse parallel connection of charactron in described every a line; several Zener diodes of the input terminal reverse parallel connection of charactron on each column are bridged by intermediate common wire between the Zener diode.Design of the invention former uses 87PCS Zener diode, and 19PCS Zener diode is used only in innovative design, and peripheral circuit is simple, produces first-pass yield and at low cost；JESD22-A114-B the and ESD STM5.1 standard that is all satisfied, 2 grades of ESDS rank requirements under the static discharge mode (HBM) of charged human body can be effectively ensured between charactron row-row/row-column/Lie-column.
Description
Technical field
The invention belongs to digital electric fields, and in particular to a kind of LED charactrons esd protection circuit.
Background technique
LED charactrons play critically important role in terms of human-computer interaction, have small power consumption, empty calory, impact resistance, longevity
The advantages that life is grown, at low cost, in white domestic appliances, automobile, the fields such as Industry Control have a very wide range of applications.
ESD (Electro-Static Discharge, static discharge) is a kind of common phenomenon for us,
However for electronic product, ESD be often it is fatal-that it may cause component internal wiring is impaired, directly affect product
Normal service life, or even cause the damage of product.
Antistatic (anti-static ability is poor) by LED lamp bead itself between existing LED charactrons row and column, ESD will lead to LED
PN junction array performance occurs reducing or damage, and LED lamp bead back discharge will lead to the damage of LED reverse breakdown, leads to LED charactrons
It fails.This design is unable to satisfy JESD22-A114-B and ESD STM5.1 standard, the static discharge mode of charged human body
(HBM) 2 grades of ESDS rank requirements, ESD voltage threshold classification are shown in Fig. 3 under.It is in the both ends LED or LED that existing market, which improves way,
One Zener diode of internal parallel is protected, and sees Fig. 4.The shortcomings that this scheme are as follows: 1, in two pole of the both ends LED parallel connection Zener
Pipe, each LED is both needed to one in parallel, periphery circuit complexity, at high cost (to increase Zener diode cost itself, Zener diode
Manufacturing cost)；2, add Zener at high cost inside one Zener diode of LED internal parallel, LED；In addition Zener is close to LED
Chip has Zener side meeting stop portions optical path, and LED charactrons is caused to show color difference (partially yellow on one side, partially blue on one side).
Summary of the invention
Goal of the invention: in view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of LED charactrons ESD protection
Circuit.
Technical solution: in order to achieve the above object of the invention, what the present invention was specifically performed by: a kind of LED charactrons
Esd protection circuit, including forming every a line by connection by LED charactrons, each column have several LED charactrons
Array, several Zener diodes of input terminal reverse parallel connection of charactron in described every a line, the input of charactron on each column
Several Zener diodes of reverse parallel connection are held, are bridged between the Zener diode by intermediate common wire.
A kind of preferred scheme, 1 Zener diode of input terminal reverse parallel connection of charactron, Mei Yilie in above-mentioned every a line
1 Zener diode of input terminal reverse parallel connection of upper charactron is bridged by intermediate common wire between the Zener diode.
The operation principle of the present invention is that: in the every a line of LED charactrons and each column difference one two pole of Zener of reverse parallel connection
It manages, Zener diode in parallel is bridged with the upper Zener diode in parallel of column by medium line on all rows；Zener diode
VA characteristic curve forward characteristic and general-purpose diode it is similar, when reversely applying electrostatic between column-row, because of Zener
The forward conduction voltage of diode is preferentially flowed through from Zener forward direction far below LED when applying electrostatic；Zener diode
Reverse characteristic be when backward voltage is lower than breakdown reverse voltage, backward resistance is very big, and reverse leakage current is minimum.But when
When backward voltage closes on the critical value of backward voltage, reverse current increases suddenly, referred to as punctures, on this critical breakdown point,
Backward resistance is down to small value suddenly.Although electric current changes within a large range, and the voltage at diode both ends is substantially
Stablize near breakdown voltage, to realize voltage-stabilizing protection function.
The utility model has the advantages that the present invention compared with traditional technology, has the advantage that
1, former design uses 87PCS Zener diode, and 19PCS Zener diode is used only in innovative design, and peripheral circuit is simple, raw
Produce first-pass yield and at low cost；
2, it can be effectively ensured between charactron row-row/row-column/Lie-column and be all satisfied JESD22-A114-B and ESD STM5.1
Standard, 2 grades of ESDS rank requirements under the static discharge mode (HBM) of charged human body.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of conventional protection circuit；
Fig. 2 is schematic structural view of the invention；
Fig. 3 is ESD voltage threshold classification figure；
Fig. 4 is the digital protection of pipe figure after tradition improvement.
Specific embodiment
Embodiment 1:
A kind of LED charactrons esd protection circuit, including by LED charactrons by connection formed every a line, it is each column have
The array of several LED charactrons, several Zener diodes of input terminal reverse parallel connection of charactron, each in described every a line
Several Zener diodes of the input terminal reverse parallel connection of charactron on column are done by intermediate common wire between the Zener diode
Bridge joint.
Embodiment 2:
LED charactrons esd protection circuit as shown in Figure 2, including every a line, each is formed by connection by LED charactrons
Column have the array of several LED charactrons, 1 Zener diode of input terminal reverse parallel connection of charactron in described every a line,
1 Zener diode of the input terminal reverse parallel connection of charactron on each column passes through intermediate common wire between the Zener diode
It bridges.
Claims (2)
1. a kind of LED charactrons esd protection circuit, including every a line, each column are formed by connection by LED charactrons
There is the array of several LED charactrons, which is characterized in that several of the input terminal reverse parallel connection of charactron is neat in described every a line
Receive diode, several Zener diodes of the input terminal reverse parallel connection of charactron on each column lead between the Zener diode
Intermediate common wire is crossed to bridge.
2. LED charactrons esd protection circuit according to claim 1, which is characterized in that charactron in described every a line
1 Zener diode of input terminal reverse parallel connection, 1 Zener diode of input terminal reverse parallel connection of charactron, described on each column
It is bridged between Zener diode by intermediate common wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810561243.0A CN109511194A (en) | 2018-06-04 | 2018-06-04 | A kind of LED charactrons esd protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810561243.0A CN109511194A (en) | 2018-06-04 | 2018-06-04 | A kind of LED charactrons esd protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109511194A true CN109511194A (en) | 2019-03-22 |
Family
ID=65745498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810561243.0A Pending CN109511194A (en) | 2018-06-04 | 2018-06-04 | A kind of LED charactrons esd protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109511194A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108650742A (en) * | 2018-06-21 | 2018-10-12 | 宜兴市旭航电子有限公司 | A kind of LED charactrons esd protection circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005259754A (en) * | 2004-03-09 | 2005-09-22 | Korai Kagi Kofun Yugenkoshi | Light emitting diode device capable of preventing electrostatic discharge damage |
| CN201294654Y (en) * | 2008-11-25 | 2009-08-19 | 石家庄市京华电子实业有限公司 | Sharing type antistatic protection circuit for LED unit matrix |
| CN101593485A (en) * | 2008-05-30 | 2009-12-02 | 北京利亚德电子科技有限公司 | The display device of LED lattice module circuit and composition thereof |
| US20110163352A1 (en) * | 2010-01-04 | 2011-07-07 | California Micro Devices | Monolithic multi-channel esd protection device |
| CN107623963A (en) * | 2017-08-25 | 2018-01-23 | 郑洪均 | The linear constant current driver of indicator lamp in power conservation type high voltage electrified monitoring system |
| CN209419916U (en) * | 2018-06-04 | 2019-09-20 | 宜兴市旭航电子有限公司 | A kind of LED charactrons esd protection circuit |
-
2018
- 2018-06-04 CN CN201810561243.0A patent/CN109511194A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005259754A (en) * | 2004-03-09 | 2005-09-22 | Korai Kagi Kofun Yugenkoshi | Light emitting diode device capable of preventing electrostatic discharge damage |
| CN101593485A (en) * | 2008-05-30 | 2009-12-02 | 北京利亚德电子科技有限公司 | The display device of LED lattice module circuit and composition thereof |
| CN201294654Y (en) * | 2008-11-25 | 2009-08-19 | 石家庄市京华电子实业有限公司 | Sharing type antistatic protection circuit for LED unit matrix |
| US20110163352A1 (en) * | 2010-01-04 | 2011-07-07 | California Micro Devices | Monolithic multi-channel esd protection device |
| CN107623963A (en) * | 2017-08-25 | 2018-01-23 | 郑洪均 | The linear constant current driver of indicator lamp in power conservation type high voltage electrified monitoring system |
| CN209419916U (en) * | 2018-06-04 | 2019-09-20 | 宜兴市旭航电子有限公司 | A kind of LED charactrons esd protection circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108650742A (en) * | 2018-06-21 | 2018-10-12 | 宜兴市旭航电子有限公司 | A kind of LED charactrons esd protection circuit |
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