CN209419917U - A kind of LED charactrons esd protection circuit - Google Patents
A kind of LED charactrons esd protection circuit Download PDFInfo
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- CN209419917U CN209419917U CN201820959532.1U CN201820959532U CN209419917U CN 209419917 U CN209419917 U CN 209419917U CN 201820959532 U CN201820959532 U CN 201820959532U CN 209419917 U CN209419917 U CN 209419917U
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- zener diode
- charactron
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Abstract
The utility model 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; it is characterized in that; the input terminal of charactron parallel diode forward or backwards in described every a line; the input terminal of charactron parallel diode forward or backwards on each column, Zener diode in parallel is bridged with the upper Zener diode in parallel of column by intermediate common wire on the row.The utility model changes former design using 87PCS Zener diode, and 19PCS Zener diode is used only, 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 utility model belongs to digital electric field, 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 as follows under:
Existing market, which improves way, to be protected in one Zener diode in the both ends LED or LED internal parallel, such as Fig. 3.
The shortcomings that this scheme are as follows:
1, in the both ends LED parallel diode, each LED is both needed to one in parallel, periphery circuit complexity, at high cost (to increase
Add Zener diode cost itself, the manufacturing cost of Zener diode)；
2, add Zener at high cost inside one Zener diode of LED internal parallel, LED；In addition Zener is close to LED core
Piece 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: the purpose of this utility model is that in view of the deficiencies of the prior art, providing a kind of LED charactrons ESD
Protect circuit.
Technical solution: in order to achieve the above object of the invention, what the utility model was specifically performed by: a kind of LED number
Code pipe esd protection circuit, including by LED charactrons by connection formed every a line, it is each column have several LED number
The array of pipe, the input terminal of charactron parallel diode forward or backwards in described every a line, charactron on each column
Input terminal parallel diode forward or backwards, Zener diode in parallel and the upper Zener diode in parallel of column on the row
It is bridged by intermediate common wire.
Preferably, on several rows charactron input terminal forward direction parallel diode, charactron on several rows
Input terminal reverse parallel connection Zener diode；The input terminal forward direction parallel diode of charactron, several columns in the several columns
The input terminal reverse parallel connection Zener diode of upper charactron；The Zener diode in parallel Zener two in parallel on column on the row
Pole pipe is bridged by intermediate common wire.
Wherein, the Zener diode number of every row charactron parallel connection is 1.
Wherein, the Zener diode number of each column charactron parallel connection is 1.
Wherein, the Zener diode number of every row charactron parallel connection be greater than 1, between each Zener diode into
Row is in parallel.
Wherein, the Zener diode number of each column charactron parallel connection be greater than 1, between each Zener diode into
Row is in parallel.
The working principle of the utility model are as follows: at the same application Zener diode forward characteristic and reverse characteristic, be expert at
Between column when positive application electrostatic, because the breakdown reverse voltage of Zener diode is higher, the forward voltage of LED is lower, and LED is led
Body, electrostatic are released by LED array circuit；When reversely applying electrostatic between column-row, because of the reverse breakdown electricity of Zener diode
Pressure is far below the breakdown reverse voltage of LED, the preferential reverse breakdown of Zener diode, in reverse breakdown, in certain electric current model
In enclosing (in other words within the scope of certain power loss), end voltage is almost unchanged, shows stabilizing voltage characteristic, and electrostatic is returned by Zener
It releases on road.
The utility model has the advantages that the utility model compared with traditional technology, has the advantage that
1, the utility model meter reaches the effective protection to ESD, peripheral circuit letter by periphery plus a small amount of Zener diode
It is single, 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；
3, in the used time of ESD effective protection, can satisfy the requirement of charactron reverse leakage current testing standard, (charactron is reversed
Leakage current testing standard: applying the backward voltage (VR=5V) of 5V, and reverse leakage current is less than 20uA(IR < 20uA).
Detailed description of the invention
Fig. 1 is the structural schematic diagram of conventional protection circuit；
Fig. 2 is the utility model structure diagram；
Fig. 3 is the schematic diagram of the both ends LED parallel diode.
Specific embodiment
Embodiment 1:
A kind of LED charactrons esd protection circuit, including every a line, Mei Yilie are formed by connection by LED charactrons
There is the array of several LED charactrons, the input terminal forward direction parallel diode of charactron, Mei Yilie in described every a line
The input terminal forward direction parallel diode of upper charactron, Zener diode in parallel and the upper Zener two in parallel of column on the row
Pole pipe is bridged by intermediate common wire.
Embodiment 2:
A kind of LED charactrons esd protection circuit, including every a line, Mei Yilie are formed by connection by LED charactrons
There is the array of several LED charactrons, the input terminal forward direction parallel diode of charactron, Mei Yilie in described every a line
The input terminal reverse parallel connection Zener diode of upper charactron, Zener diode in parallel and the upper Zener two in parallel of column on the row
Pole pipe is bridged by intermediate common wire.
Embodiment 3:
A kind of LED charactrons esd protection circuit, including every a line, Mei Yilie are formed by connection by LED charactrons
There is the array of several LED charactrons, the input terminal reverse parallel connection Zener diode of charactron, Mei Yilie in described every a line
The input terminal forward direction parallel diode of upper charactron, Zener diode in parallel and the upper Zener two in parallel of column on the row
Pole pipe is bridged by intermediate common wire.
Embodiment 4:
A kind of LED charactrons esd protection circuit, including every a line, Mei Yilie are formed by connection by LED charactrons
There is the array of several LED charactrons, the input terminal reverse parallel connection Zener diode of charactron, Mei Yilie in described every a line
The input terminal reverse parallel connection Zener diode of upper charactron, Zener diode in parallel and the upper Zener two in parallel of column on the row
Pole pipe is bridged by intermediate common wire.
Embodiment 5:
A kind of LED charactrons esd protection circuit, including every a line, Mei Yilie are formed by connection by LED charactrons
There is the array of several LED charactrons, the input terminal forward direction parallel diode of charactron, Ruo Ganhang on several rows
The input terminal reverse parallel connection Zener diode of upper charactron；Two pole of the positive Zener in parallel of the input terminal of charactron in the several columns
It manages, the input terminal reverse parallel connection Zener diode of charactron in several columns；On the row on Zener diode and column in parallel simultaneously
The Zener diode of connection is bridged by intermediate common wire.
Embodiment 6:
Reference implementation example 1 ~ 5, the Zener diode number of every row charactron parallel connection are 1.
Embodiment 7:
Reference implementation example 1 ~ 5, the Zener diode number of each column charactron parallel connection are 1.
Embodiment 8:
Reference implementation example 1 ~ 5, the Zener diode number of every row charactron parallel connection are each Zener two greater than 1
It is carried out between pole pipe in parallel.
Embodiment 9:
Reference implementation example 1 ~ 5, the Zener diode number of each column charactron parallel connection are each Zener two greater than 1
It is carried out between pole pipe in parallel.
Claims (5)
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 the input terminal of charactron is in parallel forward or backwards neat in described every a line
Receive diode, the input terminal of charactron parallel diode forward or backwards on each column, Zener two in parallel on the row
Pole pipe is bridged with the upper Zener diode in parallel of column by intermediate common wire.
2. LED charactrons esd protection circuit according to claim 1, which is characterized in that every row charactron parallel connection
Zener diode number is 1.
3. LED charactrons esd protection circuit according to claim 1, which is characterized in that each column charactron parallel connection
Zener diode number is 1.
4. LED charactrons esd protection circuit according to claim 1, which is characterized in that every row charactron parallel connection
Zener diode number is to carry out between each Zener diode in parallel greater than 1.
5. LED charactrons esd protection circuit according to claim 1, which is characterized in that each column charactron parallel connection
Zener diode number is to carry out between each Zener diode in parallel greater than 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820959532.1U CN209419917U (en) | 2018-06-21 | 2018-06-21 | A kind of LED charactrons esd protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820959532.1U CN209419917U (en) | 2018-06-21 | 2018-06-21 | A kind of LED charactrons esd protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209419917U true CN209419917U (en) | 2019-09-20 |
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ID=67929703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820959532.1U Active CN209419917U (en) | 2018-06-21 | 2018-06-21 | A kind of LED charactrons esd protection circuit |
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| CN (1) | CN209419917U (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 |
-
2018
- 2018-06-21 CN CN201820959532.1U patent/CN209419917U/en active Active
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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