CN101359457A - By-pass circuit and electronic device and display panel using the by-pass circuit - Google Patents
By-pass circuit and electronic device and display panel using the by-pass circuit Download PDFInfo
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- CN101359457A CN101359457A CNA200710141336XA CN200710141336A CN101359457A CN 101359457 A CN101359457 A CN 101359457A CN A200710141336X A CNA200710141336X A CN A200710141336XA CN 200710141336 A CN200710141336 A CN 200710141336A CN 101359457 A CN101359457 A CN 101359457A
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- thyratron
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- impedor
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Abstract
The invention discloses a bypass circuit, an electronic device and a display panel which apply the bypass circuit. The bypass circuit can be connected with the electronic element in parallel; wherein, the electronic element is provided with a first end and a second end; the bypass circuit includes a thyristor, a first impedance element and a second impedance element. The thyristor is provided with an anode, a cathode and a gate pole; wherein, the anode is coupled with the first end of the electronic element; the cathode is coupled with the second end of the electronic element; the first impedance element is coupled between the gate pole of the thyristor and the first end of the electronic element; the second impedance element is coupled between the gate pole of the thyristor and the second end of the electronic element. The bypass circuit is adopted for the bypass towards the failure electronic element in the electronic element serial set and enables other electronic elements to operate normally.
Description
Technical field
The invention relates to a kind of design of protection circuit, and particularly have the line design of bypass functionality and use electronic installation and the display panel that this line design is kept normal operation relevant for a kind of.
Background technology
LCD is the main product on the present flat-panel screens market, and it mainly is to come display frame by the display panels backlight that module backlight provided of arranging in pairs or groups.Early stage module backlight adopts fluorescent lamp as light emitting source mostly, weak point, power consumption are difficult for reducing, are subjected to easily shortcomings such as damage but because of there is serviceable life in it, change gradually at present that (Light Emitting Diode LED) is used as the light emitting source of module backlight with light emitting diode.
Module backlight with straight-down negative is an example, is that a plurality of light emitting diodes by array configurations provide an area source.Figure 1A and 1B promptly illustrate the line architecture of existing a kind of module backlight, and wherein shown in Figure 1A, a plurality of light emitting diode 112 series connection constitute a plurality of LED serials 110, and these LED serials 110 form an array side by side.Each LED serial 110 is coupled between booster circuit (BoostCircuit) 120 and the constant-current source circuit (Constant Current Circuit) 130, and is luminous with the light emitting diode 112 on each LED serial 110 of current drives.
Yet, shown in Figure 1B, because existing this kind framework is to connect light emitting diode in the mode of connecting, therefore when one of them light emitting diode 112 ' in a certain LED serial 110 ' lost efficacy (as burning), will relatedly make this LED serial 110 ' form the state of open circuit, and can't normal operation.In other words, the inefficacy of light emitting diode 112 ' will cause other light emitting diodes 112 on this LED serial 110 ' all can't be luminous, and influence the normal demonstration of LCD.
Except module backlight, other use the device of light emitting diode matrixs, for example LED display panel or light emitting diode matrix area source, or use the electronic installation of the electronic element array of other types, all there is above-mentioned problem, and can't effectively promotes its fiduciary level.
Summary of the invention
The present invention can make other electronic component keep normal running the electronic component bypass of losing efficacy in the electronic component tandem about a kind of by-pass line.
The present invention is in addition about a kind of electronic installation of using above-mentioned by-pass line, fiduciary level that can be when this by-pass line improves whole electronic installation running.
The present invention can be by this by-pass line with the display unit bypass of losing efficacy, to keep the running of other normal display units also about a kind of display panel of using above-mentioned by-pass line.
For specifically describing content of the present invention, at this a kind of by-pass line is proposed, it can be in parallel with an electronic component.This electronic component has one first end and one second end, and by-pass line comprises a thyratron (Thyristor), one first impedor and one second impedor.Thyratron has an anode, a negative electrode and a gate, and wherein anode is couple to first end of electronic component, and negative electrode is couple to second end of electronic component.First impedor is coupled between first end of the gate of thyratron and electronic component, and second impedor is coupled between second end of the gate of thyratron and electronic component.
In by-pass line of the present invention, above-mentioned by-pass line also comprises one the 3rd impedor, and it is coupled between the anode of first end of electronic component and thyratron.
In by-pass line of the present invention, above-mentioned thyratron can be thyristor (Silicon ControlledRectifier, SCR), bipolar junction transistor (Bipolar Junction Transistor, BJT) or metal oxide semiconductor field effect tube (Metal Oxide Semiconductor Field Effect Transistor, MOSFET).
In by-pass line of the present invention, above-mentioned electronic component comprises a light emitting diode.
In by-pass line of the present invention, the driving voltage of above-mentioned electronic component is Vf, and the first impedor resistance is R1, and the second impedor resistance is R2, and the critical voltage of thyratron is Vgth, and Vgth≤Vf * R2/ (R1+R2).
At this a kind of electronic installation of using above-mentioned by-pass line is proposed more.This electronic installation has an electronic component tandem at least, and can this by-pass line is in parallel with at least one electronic component in the electronic component tandem, with when this electronic component lost efficacy, the function of bypass is provided, make that other electronic components on the same tandem are kept normal running.
Above-mentioned by-pass line also can be applied in the display panel.This display panel comprises a plurality of display units and at least one by-pass line, and wherein display unit disposes with array way, and the same display unit that lists connects mutually, and wherein each display unit has one first end and one second end.In addition, by-pass line and corresponding display unit parallel connection with when this display unit lost efficacy, provide the function of bypass, so that whole display panel is kept normal running.
Based on above-mentioned, use by-pass line of the present invention and can carry out bypass the electronic component that lost efficacy in the electronic component tandem, make other electronic component keep normal running.So, will help to improve the electronic installation of using this by-pass line, the fiduciary level of device such as module for example backlight, face array light source, display panel.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Figure 1A and 1B promptly illustrate the line architecture of existing a kind of module backlight.
Fig. 2 A and 2B illustrate a kind of light emitting diode matrix with bypass functionality of embodiments of the invention.
Fig. 3 A and 3B illustrate the framework of a kind of by-pass line of embodiments of the invention.
Fig. 4 illustrates the framework of a kind of by-pass line of another embodiment of the present invention.
Embodiment
By-pass line proposed by the invention mainly comprises thyratron, first impedor and second impedor.Thyratron is in parallel with electronic component, and first impedor is with also in parallel with electronic component after second impedor is connected.The gate of thyratron more is couple between first impedor and second impedor, wherein can carry out dividing potential drop to the terminal voltage of electronic component by first impedor and second impedor, as the gate voltage of thyratron.When electronic component lost efficacy and when causing open circuit, its terminal voltage maximum, and the gate voltage after the dividing potential drop can be greater than the critical voltage of thyratron, and then trigger the thyratron conducting.So, originally should will change the thyratron of flowing through into, make that other electronic components on the same tandem can be kept normal running by the electric current of the electronic component that lost efficacy.In addition, when dump, when promptly electric current is zero, then thyratron will cut out once again.
Following embodiment will be an example with the LED serial that adopts this by-pass line, and the enforcement framework that it is concrete is described.It should be noted that following embodiment only for usefulness for example, is not in order to limit the application category of by-pass line of the present invention.In other words, above-mentioned electronic component has extensively comprised light-emitting component, display element or the like, every other have LED display panel, the light emitting diode matrix area source of similar series circuit framework, or the electronic installation of using the electronic element array of other types all can use by-pass line of the present invention, to improve the fiduciary level of whole circuit.
Fig. 2 A and 2B illustrate a kind of light emitting diode matrix with bypass functionality of embodiments of the invention.In the present embodiment, light emitting diode matrix 200 comprises a plurality of mutual LED serials 210 side by side, and each LED serial 210 is to be in series mutually by a plurality of light emitting diodes 212.This light emitting diode matrix 200 for example can be applicable on the products such as backlight liquid crystal display module, general lighting or LED display panel.Each LED serial 210 for example is to be coupled between booster circuit 220 and the constant-current source circuit 230, and is luminous with the light emitting diode 212 on each LED serial 210 of current drives.In addition, in order to realize the function of bypass, each light emitting diode 212 on-off element 240 in parallel.
Shown in Fig. 2 A, if each light emitting diode 212 normal operation on the light emitting diode matrix 200, the on-off element 240 in parallel with it can be in the state of open circuit, makes flow through each light emitting diode 212 on the LED serial 210 of electric current, and driven for emitting lights diode 212 is luminous.In addition, shown in Fig. 2 B, one of them light emitting diode 212 ' inefficacy (as burning) in a certain LED serial 210 ', when forming open circuit, the on-off element 240 ' in parallel with the light emitting diode 212 ' of this inefficacy can conducting, make the electric current on-off element 240 ' of can flowing through, and keep the normal operation of other light emitting diodes 212 on the same LED serial 210 '.
Except above-mentioned application, the light on and off that the foregoing description also can ACTIVE CONTROL light emitting diode 212.More specifically,, still can select to allow the other switch conduction of particular led 212, some specific light emitting diode 212 is extinguished even light emitting diode 212 did not lose efficacy.In other words, this light emitting diode matrix 200 can carry out dynamic driving, can provide dynamic light source when for example being applied to module backlight or lighting, and the effect of dynamic demonstration can be provided during as LED display panel.
Fig. 3 A and 3B further illustrate the framework of a kind of by-pass line of embodiments of the invention, can be used as aforesaid on-off element, to reach aforementioned effect with current bypass.Be illustrated in figure 3 as a LED serial 310 of integrating by-pass line, it for example is to be in series by a plurality of light emitting diodes 312, and is coupled to a voltage source V dc.Each light emitting diode 312 has one first end 312a and one second end 312b, and in order in parallel with by-pass line 340, and by-pass line 340 comprises elements such as thyratron 342, first impedor 344 and second impedor 346.Thyratron 342 has anode 342a, negative electrode 342b and gate 342c, and wherein anode 342a is couple to the first end 312a of its pairing light emitting diode 312, and negative electrode 342b is couple to the second end 312b of its pairing light emitting diode 312.First impedor 344 is coupled between the first end 312a of the gate 342c of thyratron 342 and light emitting diode 312.Second impedor 346 is coupled between the second end 312b of the gate 342c of thyratron 342 and light emitting diode 312.
As shown in Figure 3A, under general state, thyratron 342 is in closing state, the electric current I dc that is provided by voltage source V dc each light emitting diode 312 on the LED serial 310 of can flowing through smoothly.First impedor 344 and second impedor 346 can carry out dividing potential drop to the terminal voltage Vf of light emitting diode 312, as the gate voltage Vg1～Vgn of thyratron 342.
In the present embodiment, can set the critical voltage of thyratron 342, reach the effect of bypass.The resistance of supposing first impedor 344 is R1, and the resistance of second impedor 346 is R2, and the critical voltage of thyratron 342 is Vgth, then the critical voltage Vgth of thyratron 342 can be set at: Vgth≤Vf * R2/ (R1+R2).
More specifically, shown in Fig. 3 B, when light emitting diode 312 ' lost efficacy and when causing open circuit, the gate voltage Vg2 of its terminal voltage Vf after dividing potential drop can be greater than the critical voltage of thyratron 342 ', and then triggers thyratron 342 ' conducting.So, originally should will change the thyratron 342 ' of the by-pass line 340 ' of flowing through into, make that other light emitting diodes 312 on the same tandem can be kept normal running by the electric current of the light emitting diode 312 ' that lost efficacy.It should be noted that, breech lock (latch) characteristic that itself has based on thyratron 342 ', after thyratron 342 ' is switched on, as long as there is electric current to pass through, even gate voltage Vg2 subcritical voltage, the capital makes thyratron 342 ' continue to keep the state of path, and when the electric current I dc that is supplied up to voltage source V dc was zero, thyratron 342 ' just can cut out once again.
In addition, please refer to Fig. 4, it illustrates the framework of a kind of by-pass line of another embodiment of the present invention.Electric current for fear of the thyratron 342 of flowing through is excessive, present embodiment can be further between the anode 342a of thyratron 342 and voltage source V dc configuration the 3rd impedor 348, with the size of current of control by thyratron 342.Other elements of present embodiment are similar to the above embodiments, also can reach similar effect, please refer to the foregoing description about its explanation, repeat no more herein.
The thyratron of being mentioned among aforementioned a plurality of embodiment comprises polytype element, for example, comprise that thyristor, bipolar junction transistor or metal oxide semiconductor field effect tube etc. all are to have breech lock (latch) characteristic, and can reach the element of same effect.In addition, though previous embodiment only illustrates a LED serial as an illustration, however in practical application, can also be side by side with aforesaid LED serial, and constitute light emitting diode matrix shown in Fig. 2 A.
In sum, the by-pass line that the present invention proposes can be used in the various electronic installations, carries out bypass with the electronic component to the inefficacy on the electronic component tandem, makes other electronic component keep normal running.In addition, use the present invention and on module backlight or face array light source (as lighting), not only can improve production reliability, more can produce dynamic light source by the operation of by-pass line.In addition, if this by-pass line is applied on the display panel, also can keeps the normal demonstration of picture, and more various display effect can be provided by the operation of by-pass line.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (11)
1. a by-pass line is in parallel with an electronic component, and this electronic component has one first end and one second end, it is characterized in that this by-pass line comprises:
One thyratron has an anode, a negative electrode and a gate, and wherein this anode is couple to this first end of this electronic component, and this negative electrode is couple to this second end of this electronic component;
One first impedor is coupled between this first end of this gate of this thyratron and this electronic component; And
One second impedor is coupled between this second end of this gate of this thyratron and this electronic component.
2. by-pass line as claimed in claim 1 is characterized in that, also comprises one the 3rd impedor, is coupled between this anode of this first end of this electronic component and this thyratron.
3. by-pass line as claimed in claim 1 is characterized in that this thyratron comprises thyristor, bipolar junction transistor or metal oxide semiconductor field effect tube.
4. by-pass line as claimed in claim 1 is characterized in that this electronic component comprises a light emitting diode.
5. by-pass line as claimed in claim 1 is characterized in that, the driving voltage of this electronic component is Vf, this first impedor resistance is R1, this second impedor resistance is R2, and the critical voltage of this thyratron is Vgth, and Vgth≤Vf * R2/ (R1+R2).
6. the electronic installation with bypass functionality is characterized in that, comprising:
At least one electronic component tandem is in series by a plurality of electronic components, and wherein each electronic component has one first end and one second end;
At least one by-pass line, one of them is in parallel with those electronic components, and this by-pass line comprises:
One thyratron has an anode, a negative electrode and a gate, and wherein this anode is couple to this first end of this electronic component, and this negative electrode is couple to this second end of this electronic component;
One first impedor is coupled between this first end of this gate of this thyratron and this electronic component; And
One second impedor is coupled between this second end of this gate of this thyratron and this electronic component.
7. the electronic installation with bypass functionality as claimed in claim 6 is characterized in that, this by-pass line also comprises one the 3rd impedor, is coupled between this anode of this first end of this electronic component and this thyratron.
8. the electronic installation with bypass functionality as claimed in claim 6 is characterized in that this thyratron comprises thyristor, bipolar junction transistor or metal oxide semiconductor field effect tube.
9. the electronic installation with bypass functionality as claimed in claim 6 is characterized in that each electronic component comprises a light emitting diode.
10. the electronic installation with bypass functionality as claimed in claim 6, it is characterized in that, the driving voltage of each electronic component is Vf, this first impedor resistance is R1, this second impedor resistance is R2, the critical voltage of this thyratron is Vgth, and Vgth≤Vf * R2/ (R1+R2).
11. a display panel is characterized in that, comprising:
A plurality of display units, those display units dispose with array way, and same those display units that list connect mutually, and wherein each display unit has one first end and one second end;
At least one by-pass line, one of them is in parallel with those display units, and this by-pass line comprises:
One thyratron has an anode, a negative electrode and a gate, and wherein this anode is couple to this first end of this display unit, and this negative electrode is couple to this second end of this display unit;
One first impedor is coupled between this first end of this gate of this thyratron and this display unit; And
One second impedor is coupled between this second end of this gate of this thyratron and this display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710141336XA CN101359457A (en) | 2007-08-01 | 2007-08-01 | By-pass circuit and electronic device and display panel using the by-pass circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710141336XA CN101359457A (en) | 2007-08-01 | 2007-08-01 | By-pass circuit and electronic device and display panel using the by-pass circuit |
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| Publication Number | Publication Date |
|---|---|
| CN101359457A true CN101359457A (en) | 2009-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710141336XA Pending CN101359457A (en) | 2007-08-01 | 2007-08-01 | By-pass circuit and electronic device and display panel using the by-pass circuit |
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| CN (1) | CN101359457A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104717803A (en) * | 2009-08-14 | 2015-06-17 | 万斯创新股份有限公司 | Reduction of harmonic distortion for LED loads |
| CN110912073A (en) * | 2018-09-17 | 2020-03-24 | 国网浙江省电力公司 | Observation system for power electronic device damage time evolution law |
| CN113252985A (en) * | 2021-07-16 | 2021-08-13 | 深圳市迅特通信技术股份有限公司 | Measuring device and measuring method for measuring impedance of high-speed signal line in optical module |
-
2007
- 2007-08-01 CN CNA200710141336XA patent/CN101359457A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104717803A (en) * | 2009-08-14 | 2015-06-17 | 万斯创新股份有限公司 | Reduction of harmonic distortion for LED loads |
| CN104717803B (en) * | 2009-08-14 | 2017-09-05 | 万斯创新股份有限公司 | Reduce the method and device of the harmonic distortion of LED load |
| CN110912073A (en) * | 2018-09-17 | 2020-03-24 | 国网浙江省电力公司 | Observation system for power electronic device damage time evolution law |
| CN110912073B (en) * | 2018-09-17 | 2022-04-08 | 国网浙江省电力公司 | Observation system for power electronic device damage time evolution law |
| CN113252985A (en) * | 2021-07-16 | 2021-08-13 | 深圳市迅特通信技术股份有限公司 | Measuring device and measuring method for measuring impedance of high-speed signal line in optical module |
| CN113252985B (en) * | 2021-07-16 | 2021-10-01 | 深圳市迅特通信技术股份有限公司 | Measuring device and measuring method for measuring impedance of high-speed signal line in optical module |
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Open date: 20090204 |