CN206961494U - LED display circuit, LED television and LED display - Google Patents
LED display circuit, LED television and LED display Download PDFInfo
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- CN206961494U CN206961494U CN201720138265.7U CN201720138265U CN206961494U CN 206961494 U CN206961494 U CN 206961494U CN 201720138265 U CN201720138265 U CN 201720138265U CN 206961494 U CN206961494 U CN 206961494U
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Abstract
The utility model discloses a kind of LED display circuit, LED television and LED display.Wherein, the LED display circuit includes：LED lamp bead array；The row that row driving is provided for the lamp bead into LED lamp bead array drive array；The row driving switch array of row driving is provided for the lamp bead into LED lamp bead array；Common cathode leadage circuit, wherein, common cathode leadage circuit and row driving switch array in parallel, wherein, common cathode leadage circuit includes voltage-stabilized power supply and at least one vent unit, and the first side of at least one vent unit is connected to the first side of row driving switch array, second side of at least one vent unit is connected to voltage-stabilized power supply, wherein, voltage-stabilized power supply is used to provide backward voltage to lamp bead array, and the direction of backward voltage is in opposite direction with the operating voltage of lamp bead array.The utility model solves in correlation technique and the technical problem of ghost easily occurs in display using the product of common cathode display circuit.
Description
Technical field
Circuit field is the utility model is related to, is shown in particular to a kind of LED display circuit, LED TVs and LED
Screen.
Background technology
The small spacing LED television of existing market is widely used in various public information display fields, such as transport information is observed
The information bulletin of room, hotel lobby, airport, movie theatre, hospital etc., and corporate image publicity, Cultural relics in museum displaying, meeting
The indoor place such as room, club, market, hall, and the small spacing LED television of a new generation also has begun to develop to family expensesization, such as
Modern small spacing LED television also gradually substitutes LCD TV and is increasingly becoming main flow, and application prospect is quite varied.It is existing at present
The widely used or traditional mode of releasing of LED television product, that is, utilize resistant series voltage-regulator diode mode.Current
In LED television industry, display circuit in LED television from LED lamp bead array, arrange to driving battle array column and row to driving array and biography
The leadage circuit composition of system.LED lamp bead array is responsible for image and shown, arranges and is mainly made up of to driving array constant current IC, is responsible for altogether
The negative electrode pin control of negative electrode LED lamp bead, row are mainly made up of to array NMOS arrays, are responsible for the negative electrode of common cathode LED lamp beads
Antenna array control, traditional leadage circuit are mainly made up of resistant series voltage-regulator diode, are responsible for unnecessary electricity and are released, due to LED
Lamp bead array, which exists, frequently to be opened and closed, and also there is unnecessary electricity on circuit within the period of closing, and this
A little unnecessary electricity will make LED lamp bead maintain certain brightness during LED is turned off, and these unnecessary electricity are for we
It is unwanted, so just need a special circuit come this part electricity of releasing, and traditional way is exactly using electric
The mode for hindering series voltage stabilizing diode forms leadage circuit, completes releasing for unnecessary electricity, so as to lift the display of LED television
Effect.
For small spacing LED shows product, there is following weak point using the existing mode of releasing：Normal condition is opened
Logical LED only forms path over the ground by constant-current source, and existing mode of releasing is after LED short circuits, and the lamp bead of other row is open-minded
During path of releasing can be formed by the short-circuit LED over the ground by voltage-regulator diode and resistance, the electric current ratio that LED lamp bead passes through
Normally big, the brightness of the lamp bead of the row is increased, and makes LED television display abnormal, i.e. our usually said short-circuit caterpillars
Phenomenon.
For applying the product of common cathode display circuit the technical problem of ghost easily occur in display in correlation technique,
Not yet propose effective solution at present.
Utility model content
The utility model embodiment provides a kind of LED display circuit, LED television and LED display, at least to solve phase
Easily there is the technical problem of ghost in display using the product of common cathode display circuit in the technology of pass.
According to the one side of the utility model embodiment, there is provided a kind of LED display circuit, the LED display circuit bag
Include：LED lamp bead array；Row driving array, wherein, the first side of row driving array, to being connected, arranges with the row of LED lamp bead array
The second side joint power supply of array is driven, the lamp bead that row driving array is used for into LED lamp bead array provides row driving；Row driving is opened
Close array, wherein, the first side of row driving switch array and the row of LED lamp bead array to being connected, row driving switch array
Second side joint, the lamp bead that row driving switch array is used for into LED lamp bead array provides row driving；Common cathode leadage circuit, its
In, common cathode leadage circuit and row driving switch array in parallel, wherein, common cathode leadage circuit includes voltage-stabilized power supply and at least one let out
Unit is put, the first side of at least one vent unit is connected to the first side of row driving switch array, at least one vent unit
The second side be connected to voltage-stabilized power supply, wherein, voltage-stabilized power supply be used for lamp bead array provide backward voltage, the direction of backward voltage
It is in opposite direction with the operating voltage of lamp bead array.
Further, LED lamp bead array includes N number of lamp bead row, and row driving switch array includes N switch, N number of switch
For controlling N number of lamp bead row correspondingly.
Further, at least one vent unit includes N number of vent unit, the first side and the N number of lamp bead of N number of vent unit
Row connects one to one.
Further, N number of switch includes first switch, and at least one vent unit includes the first vent unit, and first lets out
Putting unit includes：First resistor, first end are connected to the first end of first switch, wherein, the second end ground connection of first switch；The
One diode, negative pole are connected to the second end of first resistor, and positive pole is connected to voltage-stabilized power supply.
Further, voltage-stabilized power supply is connected by the first side with least one vent unit, the second side of voltage-stabilized power supply
Ground connection.
Further, row driving array is constant current IC arrays.
Further, row driving switch array is NMOS tube array.
Further, voltage-stabilized power supply is controllable voltage-stabilized power supply, and LED display circuit also includes：Controller, with controllable voltage stabilizing electricity
Source is connected, for controlling the output voltage values of controllable voltage-stabilized power supply to be no more than predetermined threshold value.
According to the another aspect of the utility model embodiment, a kind of LED television is additionally provided, the LED TVs are small spacing
LED television and including LED display circuit of the present utility model.
According to the another aspect of the utility model embodiment, a kind of LED display is additionally provided, the LED display includes
LED display circuit of the present utility model.
In the utility model embodiment, let out by common cathode in parallel on the row driving switch array in LED display circuit
Road discharge come unnecessary electricity of releasing, wherein, common cathode leadage circuit includes voltage-stabilized power supply and at least one vent unit, and at least one
First side of individual vent unit is connected to the first side of row driving switch array, and the second side of at least one vent unit is connected to
Voltage-stabilized power supply, solve the technology for ghost easily occur in display using the product of common cathode display circuit in correlation technique and ask
Topic, and then realize the technique effect in LED display circuit.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, forms the part of the application,
Schematic description and description of the present utility model is used to explain the utility model, does not form to of the present utility model improper
Limit.In the accompanying drawings：
Fig. 1 is the schematic diagram according to a kind of optional LED display circuit of the utility model embodiment；
Fig. 2 is the schematic diagram according to a kind of optional common cathode leadage circuit of the utility model embodiment.
Embodiment
In order that those skilled in the art more fully understand the utility model, it is real below in conjunction with the utility model
The accompanying drawing in example is applied, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that be described
Embodiment is only the embodiment of the utility model part, rather than whole embodiments.Based on the reality in the utility model
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all should
When the scope for belonging to the utility model protection.
It should be noted that term " first " in specification and claims of the present utility model and above-mentioned accompanying drawing,
" second " etc. is for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so
The data used can exchange in the appropriate case, so that embodiment of the present utility model described herein can be with except at this
In diagram or description those beyond order implement.In addition, term " comprising " and " having " and their any deformation, meaning
Figure is to cover non-exclusive include.
According to the embodiment of the present application, there is provided a kind of LED display circuit.
Fig. 1 is according to a kind of schematic diagram of optional LED display circuit of the utility model embodiment, as shown in figure 1, should
LED display circuit includes LED lamp bead array 10, row driving array 20, row driving switch array 30 and common cathode leadage circuit 40.
LED lamp bead array includes multiple LED lamp beads of regularly arranged distribution, and multiple LED lamp beads look up point from capable side
Cloth looks up from the side of row at least one lamp bead row and is scattered at least one lamp bead row.LED lamp bead array forms LED and shown
The display portion of circuit.
The lamp bead that row driving array is used for into LED lamp bead array provides row driving, the first side of row driving array and LED
For the row of lamp bead array to being connected, row drive the second side joint power supply of array.
Row driving switch array is used for lamp bead into LED lamp bead array and provides row driving, and the of row driving switch array
The row of side and LED lamp bead array is to being connected, the second side joint of row driving switch array.
Common cathode leadage circuit and row driving switch array in parallel, wherein, common cathode leadage circuit is including voltage-stabilized power supply and at least
One vent unit, the first side of at least one vent unit is connected to the first side of row driving switch array, at least one to let out
The second side for putting unit is connected to voltage-stabilized power supply.Wherein, voltage-stabilized power supply is used to provide backward voltage, backward voltage to lamp bead array
Direction and the operating voltage of lamp bead array it is in opposite direction.Lamp of the common cathode leadage circuit by voltage-stabilized power supply into lamp bead array
The cathode terminal of pearl applies the voltage of opposite direction, can raise the negative electrode terminal voltage of LED lamp bead, reverse charging is provided for equivalent capacity
Path, the electricity released in equivalent capacity, when electricity releases completion, the voltage in equivalent capacity is 0V, and voltage-stabilized power supply is electric
Road continues as equivalent capacity reverse charging, and when being flushed to the magnitude of voltage of voltage-stabilized power supply, the voltage stabilization in equivalent capacity is at this
Magnitude of voltage no longer raises, now one reverse electric capacity of LED lamp beads equivalent parallel, and LED lamp bead enters reverse blocking state.
The embodiment is more to release by common cathode leadage circuit in parallel on the row driving switch array in LED display circuit
Remaining electricity, wherein, common cathode leadage circuit includes voltage-stabilized power supply and at least one vent unit, and the of at least one vent unit
Side is connected to the first side of row driving switch array, and the second side of at least one vent unit is connected to voltage-stabilized power supply, solves
Easily there is the technical problem of ghost in display using the product of common cathode display circuit in correlation technique, and then realize
Technique effect in LED display circuit.
Alternatively, row driving switch array includes multiple switch, the number of switch and the row of the lamp bead row of LED lamp bead array
Number is identical, each switchs a line lamp bead for controlling LED lamp bead array.Specifically, LED lamp bead array includes N number of lamp bead row,
Row driving switch array includes N number of switch, N number of to switch for controlling N number of lamp bead row correspondingly.
Correspondingly, at least one vent unit can include N number of vent unit, the first side and the N number of lamp of N number of vent unit
Pearl row connects one to one, and the second side of N number of vent unit is connected to voltage-stabilized power supply.
N number of switch includes first switch, and at least one vent unit includes the first vent unit, and the first vent unit can be with
Including：First resistor, first end are connected to the first end of first switch, wherein, the second end ground connection of first switch；One or two pole
Pipe, negative pole are connected to the second end of first resistor, and positive pole is connected to voltage-stabilized power supply.Specifically, the electricity of above-mentioned common cathode leadage circuit
Line structure can as shown in Figure 2, and each vent unit includes a resistance and a diode.The first end and switch of resistance
First end be connected, the second end of switch ground connection.The negative pole of diode is connected to the second end of resistance, and the positive pole of diode connects
It is connected to voltage-stabilized power supply 41.Voltage-stabilized power supply 41 is connected by the first side with least one vent unit, and the second of voltage-stabilized power supply 41
Side joint.
Alternatively, row driving array is constant current IC arrays.Constant current IC array portions provide the row driving of LED lamp bead.
Alternatively, row driving switch array is NMOS tube array.NMOS tube array portion provides the row driving of LED lamp bead.
Alternatively, each NMOS tube is a switch, controls the opening and closing of a line LED lamp beads.
Alternatively, voltage-stabilized power supply is controllable voltage-stabilized power supply.Common cathode leadage circuit is released by controllable voltage-stabilized power supply to realize,
It is applied to by stable voltage reversal in LED lamp bead come unnecessary electricity in suppression circuit, is formed and released back by LED lamp bead
Road, so as to realize control of releasing.
LED display circuit can also include controller, and controller is connected with controllable voltage-stabilized power supply, controllable steady for controlling
The output voltage values of voltage source are no more than predetermined threshold value.To be not damaged by lamp bead, controllable voltage-stabilized power supply can be controlled to lamp bead
The reverse voltage restraint of offer makes LED lamp bead reach off state rapidly within 1V, so as to reach the effect for unnecessary electricity of releasing
Fruit, the reliable upper ghost phenomenon for suppressing LED TVs, makes display effect reach good lifting.
Alternatively, controller can also control the service time of LED lamp bead, and LED display circuit passes through controller timesharing wheel
The service time of stream switching LED lamp bead realizes the Dynamic Announce of picture, controls row control NMOS tube to open one's own profession LED in controller
During the display of lamp bead, the row control NMOS tube of lastrow LED lamp bead turns off the lastrow lamp bead, in the process common cathode vent discharge
Road carries out electric discharge suppression to lastrow LED lamp bead, unnecessary electricity is only consumed on the circuit of circuit board, without to LED
Pearl forms path.In the moment that LED is closed, NMOS tube is closed, and feeder ear reaches the anode tap of LED lamp bead by constant-current source, it
Ground level is flowed to by NMOS tube afterwards, now the anode tap of LED lamp bead and cathode terminal are present in circuit there is capacity effect
An equivalent capacity be present in unnecessary electricity, LED lamp bead both ends, if not applying a voltage in the end of oppisite phase of LED lamp bead,
Electricity in equivalent capacity will be discharged by LED lamp bead, LED lamp bead is maintaininged lights state.
It is above-mentioned to control the embodiment of controllable voltage-stabilized power supply flexibly to control leadage circuit by program using controller
Voltage-stabilized power supply circuit output voltage values, adjust its output voltage, zone of reasonableness provided for LED lamp bead
Backward voltage, with the rational discharge and recharge resistance of unification, allow the equivalent capacity of LED lamp bead to realize quick discharge and recharge, reach fast
Speed suppresses the effect of the equivalent capacity both end voltage, LED lamp bead is reached balance during being switched on and off, can be true
LED lamp beads are protected accurately to light and extinguish.By series diode it is possible to prevente effectively from back discharge, while can also make to adopt
It is guaranteed with the efficiency of the LED television of the LED display circuit of the embodiment.The LED display circuit that the embodiment provides is
Through by verification experimental verification, experiment proof is feasible, good application has been obtained on existing product, and can reach fine
Effect of releasing, make using the embodiment provide LED display circuit LED television display effect it is more excellent.
The embodiment of the present application additionally provides a kind of LED television, and the LED television is for small spacing LED TVs and including this practicality
New LED display circuit.
Voltage stabilizing electricity of releasing can be utilized using the small spacing LED television of the common cathode product of the LED display circuit of above-described embodiment
Source circuit eliminates the upper ghost of the small spacing LED television of common cathode product, realizes that automatic discharging, discharge electricity amount are controllable, limit electric discharge side
It is adjustable and the velocity of discharge can adjust to, discharge voltage.
The common cathode leadage circuit for the small spacing LED television that the embodiment provides can reliably suppress LED lamp bead abnormity point
Bright, so that control is more accurate, realization is released, and electricity is controllable, speed of releasing is controllable, discharge voltage value is controllable, by hardware electricity
Automatic discharging is hindered, year-on-year traditional leadage circuit can also reduce the power consumption of leadage circuit, effectively eliminate small spacing LED television
Upper ghost phenomenon, the display effect of small spacing LED television is improved, reach relatively perfect display effect.
The embodiment of the present application additionally provides a kind of LED display, and the LED display is shown including LED of the present utility model
Circuit.
The order of above-mentioned the embodiment of the present application does not represent the quality of embodiment.
In above-described embodiment of the application, the description to each embodiment all emphasizes particularly on different fields, and does not have in some embodiment
The part of detailed description, it may refer to the associated description of other embodiment.In several embodiments provided herein, it should be appreciated that
Arrive, disclosed technology contents, can realize by another way.
Described above is only the preferred embodiment of the application, it is noted that for the ordinary skill people of the art
For member, on the premise of the application principle is not departed from, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as the protection domain of the application.
Claims (10)
- A kind of 1. LED display circuit, it is characterised in that including：LED lamp bead array；Row driving array, wherein, the row of the first side and the LED lamp bead array of the row driving array are described to being connected Second side joint power supply of row driving array, the lamp bead that the row driving array is used for into the LED lamp bead array provide row and driven It is dynamic；Row driving switch array, wherein, the row of the first side of the row driving switch array and the LED lamp bead array is to being connected Connect, the second side joint of the row driving switch array, the row driving switch array is used for into the LED lamp bead array Lamp bead provides row driving；Common cathode leadage circuit, wherein, the common cathode leadage circuit and the row driving switch array in parallel, wherein, the common cathode Leadage circuit includes voltage-stabilized power supply and at least one vent unit, and the first side of at least one vent unit is connected to described First side of row driving switch array, the second side of at least one vent unit are connected to the voltage-stabilized power supply, wherein, institute Voltage-stabilized power supply is stated to be used to provide backward voltage, the direction of the backward voltage and the work of the lamp bead array to the lamp bead array Make the in opposite direction of voltage.
- 2. LED display circuit according to claim 1, it is characterised in that the LED lamp bead array includes N number of lamp bead row, The row driving switch array includes N number of switch, and N number of switch is used to control N number of lamp bead row correspondingly.
- 3. LED display circuit according to claim 2, it is characterised in that at least one vent unit includes N number of let out Unit is put, the first side of N number of vent unit connects one to one with N number of lamp bead row.
- 4. LED display circuit according to claim 3, it is characterised in that N number of switch includes first switch, described At least one vent unit includes the first vent unit, and first vent unit includes：First resistor, first end are connected to the first end of the first switch, wherein, the second end ground connection of the first switch；First diode, negative pole are connected to the second end of the first resistor, and positive pole is connected to the voltage-stabilized power supply.
- 5. LED display circuit according to claim 1, it is characterised in that the voltage-stabilized power supply by the first side with it is described At least one vent unit is connected, the second side joint of the voltage-stabilized power supply.
- 6. LED display circuit according to claim 1, it is characterised in that the row driving array is constant current IC arrays.
- 7. LED display circuit according to claim 1, it is characterised in that the row driving switch array is NMOS tube battle array Row.
- 8. LED display circuit according to claim 1, it is characterised in that the voltage-stabilized power supply is controllable voltage-stabilized power supply, institute Stating LED display circuit also includes：Controller, it is connected with the controllable voltage-stabilized power supply, for controlling the output voltage values of the controllable voltage-stabilized power supply not surpass Cross predetermined threshold value.
- 9. a kind of LED television, it is characterised in that the LED television in claim 1 to 8 for small spacing LED television and including appointing LED display circuit described in one.
- 10. a kind of LED display, it is characterised in that including the LED display circuit any one of claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720138265.7U CN206961494U (en) | 2017-02-15 | 2017-02-15 | LED display circuit, LED television and LED display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720138265.7U CN206961494U (en) | 2017-02-15 | 2017-02-15 | LED display circuit, LED television and LED display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206961494U true CN206961494U (en) | 2018-02-02 |
Family
ID=61376383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720138265.7U Active CN206961494U (en) | 2017-02-15 | 2017-02-15 | LED display circuit, LED television and LED display |
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| Country | Link |
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| CN (1) | CN206961494U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106601186A (en) * | 2017-02-15 | 2017-04-26 | 利亚德光电股份有限公司 | LED display optimization circuit |
| WO2023130772A1 (en) * | 2022-01-07 | 2023-07-13 | 惠州视维新技术有限公司 | Shunt circuit of display device and display device |
-
2017
- 2017-02-15 CN CN201720138265.7U patent/CN206961494U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106601186A (en) * | 2017-02-15 | 2017-04-26 | 利亚德光电股份有限公司 | LED display optimization circuit |
| WO2023130772A1 (en) * | 2022-01-07 | 2023-07-13 | 惠州视维新技术有限公司 | Shunt circuit of display device and display device |
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