CN108140349A - Matrix circuit, display equipment and household electrical appliance for the display equipment of household electrical appliance - Google Patents
Matrix circuit, display equipment and household electrical appliance for the display equipment of household electrical appliance Download PDFInfo
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- CN108140349A CN108140349A CN201680058425.5A CN201680058425A CN108140349A CN 108140349 A CN108140349 A CN 108140349A CN 201680058425 A CN201680058425 A CN 201680058425A CN 108140349 A CN108140349 A CN 108140349A
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- row
- matrix circuit
- supply line
- light emitting
- resistor
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/06—Passive matrix structure, i.e. with direct application of both column and row voltages to the light emitting or modulating elements, other than LCD or OLED
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/04—Display protection
Abstract
The present invention relates to one kind to be used for household electrical appliance（1）Display equipment（2）Matrix circuit（3）, light emitting diode of the matrix circuit with predetermined number（D1 to D9）, the light emitting diode passes through corresponding supply line（LZ, LS）Line by line（Z1, Z2, Z3）And column by column（S1, S2, S3）Connection.Here, the row（S1, S2, S3）With the row（Z1, Z2, Z3）It is respectively provided with controllable switch element（4,6）For switching in the row（S1, S2, S3）Corresponding supply line（LS）With the matrix circuit（3）Supply electric connecting terminal（5）Between be conductively connected and in the row（Z1, Z2, Z3）Corresponding supply line（LZ）With the matrix circuit（3）Grounding connection end（7）Between be conductively connected.The matrix circuit（3）For each row（S1, S2, S3）It is respectively provided with a first resistor（R1）, in order to by corresponding supply line（LS）Electric connecting terminal is supplied with described（5）Electrical connection, the first resistor and corresponding row（S1, S2, S3）Controllable switch element（4）It is connected in parallel.It is alternatively to this place, the matrix circuit（3）For each row（S1, S2, S3）With at least one first resistor（R1）, in order to by corresponding supply line（LS）Electric connecting terminal is supplied with described（5）Electrical connection, at least one first resistor can be with corresponding row（S1, S2, S3）Controllable first switching element（4）It is connected in parallel.In addition, the present invention relates to a kind of display equipment（2）And a kind of household electrical appliance（1）.
Description
Technical field
The present invention relates to a kind of matrix circuit of the display equipment for household electrical appliance, the matrix circuit has in advance really
The light emitting diode being arranged in row and column of fixed number, wherein, in each row, the cathode of the light emitting diode passes through
Supply line is electrically connected, and in each column, the anode of the light emitting diode is electrically connected by supply line, and its
In, each row respectively include a controllable first switching element for switching corresponding supply line and the matrix circuit
For being conductively connected between electric connecting terminal, it is described to there is the first current potential, and one is respectively included per a line for electric connecting terminal
Controllable second switch element is used to switch between corresponding supply line and the grounding connection end of the matrix circuit
It is conductively connected, the grounding connection end has compared to smaller second current potential of first current potential.The present invention additionally relates to one
Display equipment and a kind of household electrical appliance at least one display equipment of the kind with matrix circuit.
Background technology
Matrix circuit has been known from the state of the art and for that can manipulate multiple electrical appliances, example by simple mode
Such as light emitting diode or LED.Light emitting diode is arranged in columns and rows thus, wherein, by the anode of such as light emitting diode
It connects by column and connects the cathode of light emitting diode line by line.Here, these row controllable can be opened by one respectively
Close element, so-called row driver is electrically connected with for electric connecting terminal, and can be controllable by one respectively by these rows
Switch element, so-called line driver are electrically connected with grounding connection end.If one during these are arranged is driven by affiliated row
Dynamic device for electric connecting terminal with connecting and connecting one in these rows with grounding connection end by affiliated line driver, then
Light emitting diode in the intersection point of the row and column connected is run on stream direction or forward direction.Electric current flows through as a result,
Light emitting diode and lumination of light emitting diode or transmitting light.Other light emitting diodes of the matrix arrangements are in cut-off and run
In.Here, blanking voltage is fallen on a light emitting diode and leakage current can be flowed through in the running light emitting diode of cut-off,
The leakage current may damage or destroy light emitting diode.It describes, is provided for matrix electricity in 2,006 258959 A2 of JP
The counter voltage of the light emitting diode on road（Gegenspannung）.
Invention content
The task of the present invention is provide a kind of how to avoid preferably and more simply flowing through the hair of matrix circuit
The solution of the leakage current of optical diode.
According to the present invention, the task is by having the matrix circuit of the feature according to independent claims, display equipment
And household electrical appliance solve.
First matrix circuit of the display equipment according to the present invention for household electrical appliance has predetermined number
The light emitting diode being arranged in row and column, wherein, in each row, the cathode of the light emitting diode passes through supply line's electricity
Connection, and in each column, the anode of the light emitting diode is electrically connected by supply line.Here, each row wrap respectively
A controllable first switching element is included for switching in corresponding supply line with the matrix circuit for electric connecting terminal
Between be conductively connected, it is described to there is the first current potential, and respectively include one controllable second per a line for electric connecting terminal
Switch element is described for switching in being conductively connected between corresponding supply line and the grounding connection end of the matrix circuit
Grounding connection end has compared to smaller second current potential of first current potential.In addition, the matrix circuit distinguishes each row
Tool there are one first resistor, in order to the confession electric connecting terminal of corresponding supply line and the matrix circuit is electrically connected and in order to
Electric current is fed into the supply line from described for electric connecting terminal, the first resistor with it is corresponding arrange controllable the
One switch element is connected in parallel.
Matrix circuit can set the display equipment for household electrical appliance.It can be to the use of household electrical appliance by display equipment
Family shows the information about household electrical appliance, such as the operating status of household electrical appliance.Such display equipment may, for example, be seven sections
Display or LED- displays.Matrix circuit includes the row and column of predetermined number, wherein, divide per a line with each row
It Ju not be there are one supply line.By the corresponding supply line of row, it is arranged in the anode of all light emitting diodes in the row
It is electrically connected to each other.By capable supply line, the cathode of all light emitting diodes in the row is electrically connected to each other.In addition,
Each row are respectively provided with a controllable first switching element or are respectively provided with a row driver, and have respectively per a line
There are one controllable second switch element or it is respectively provided with a line driver.Preferably, it controllable first and second opens
It closes element and is configured to bipolar transistor, the bipolar transistor for example can be by the control device of matrix circuit come open and close of breaking
It closes.In the closed state of one of controllable first switching element, the corresponding supply line of the row is with supplying electric connecting terminal electricity
Connection, and in the state of the disconnection in one of controllable first switching element, affiliated supply line is with supplying electric connecting terminal
Separation is decoupled.In the closed state of one of controllable second switch element, corresponding supply line and the ground connection of the row
Connecting pin is electrically connected, and in the state of the disconnection in one of controllable second switch element, supply line and grounding connection
End separation or decoupled.
It, will be to be shipped by controllable first switching element in order to which such as manipulation one of light emitting diode now emits light
The supply line for the row that capable light emitting diode is located therein connect with for electric connecting terminal.In addition, it is opened by controllable second
Element is closed to connect the row that light emitting diode is located therein with grounding connection end.Therefore, by the sun of light emitting diode to be manipulated
Pole is connected to for being connected on grounding connection end on electric connecting terminal and by the cathode of light emitting diode to be manipulated.Grounding connection
End is located on the reference potential as the second current potential, such as 0V.It is located at for electric connecting terminal and is supplied on electric potential as the first current potential,
Such as 5V.In the power supply electricity for that therefore can be measured between electric connecting terminal and grounding connection end for being powered to light emitting diode
Pressure.By second on the first current potential on the anode of the light emitting diode manipulated and the cathode of light emitting diode manipulated
Difference or difference between current potential, electric current, i.e. before flow through manipulated light emitting diode to light stream and make the light emitting diode send out
Light.
The row being located therein by light emitting diode to be run are connected on electric connecting terminal, positioned at the hair with being manipulated
All anodes of light emitting diode in the identical row of optical diode are also connected on the first current potential.Pass through to be run luminous two
The row that pole pipe is located therein is connected on grounding connection end, in shining in the row identical with the light emitting diode manipulated
There are the second current potentials on all cathodes of diode.It may occur herein：Electricity in leakage current, i.e. inverse direction or cut-off direction
Stream may flow through the light emitting diode not being steered, and the leakage current may lead to the destruction of light emitting diode.
In order to avoid the electric current, equipped with first resistor, wherein, controllable the of a first resistor and row respectively
One switch element connects.By first resistor, corresponding supply line is enduringly electrically connected with for electric connecting terminal, even if when parallel connection
The first switching element of connection is also such when disconnecting.In other words it means that controllable first switching element is controllable
First switching element off-state in bridged by the first resistor that is connected in parallel.Therefore one first resistor of the difference connects
Onto the first current potential or supply voltage.Enduringly forward current is presented with passing through by controllable first switching element as a result,
Enter into the supply line of the row and be therefore fed into all light emitting diodes of matrix circuit, be also fed into and do not grasped
In the light emitting diode of control.In other words, all light emitting diodes of matrix circuit are enduringly run in the forward direction.Institute's feed-in
Forward current for example can draw away grounding connection end by being configured to the second switch element of bipolar transistor.Therefore, may be used
By by preventing the leakage current by light emitting diode in a manner of particularly simple.Here, it is needed only advantageously for each row
One unique first resistor with especially saving component and less expends ground configuration so as to matrix circuit.
It can also set, the cathode of light emitting diode connects line by line, and the anode of light emitting diode connects line by line.
In this case, these rows by controllable switch element be connected on electric connecting terminal and these row pass through it is controllable
Switch element be connected on grounding connection end.
The second matrix circuit according to the present invention for the display equipment of household electrical appliance has predetermined number
The light emitting diode being arranged in row and column, wherein, in each row, the cathode of the light emitting diode passes through supply line's electricity
Connection, and in each column, the anode of the light emitting diode is electrically connected by supply line.Here, each row wrap respectively
A controllable first switching element is included for switching in corresponding supply line with the matrix circuit for electric connecting terminal
Between be conductively connected, it is described to there is the first current potential, and respectively include one controllable second per a line for electric connecting terminal
Switch element is described for switching in being conductively connected between corresponding supply line and the grounding connection end of the matrix circuit
Grounding connection end has compared to smaller second current potential of first current potential.In addition, the matrix circuit has each row
At least one first resistor, in order to corresponding supply line and the matrix circuit are electrically connected for electric connecting terminal and in order to
Electric current is fed into the supply line from described for electric connecting terminal, at least one first resistor can be arranged with corresponding
Controllable first switching element is connected in parallel.
The description of preamble about the second matrix circuit according to the present invention, with reference to the first matrix according to the present invention
The description of the preamble of circuit.The difference of second matrix circuit according to the present invention and the first matrix circuit according to the present invention
It is, first resistor is impermanently connected in parallel with first switching element and forward current impermanently therefore is fed into use
In the supply line of the light emitting diode of matrix circuit.Especially, only when manipulation matrix circuit light emitting diode in extremely
Few one when shine, i.e., only when at least one of controllable first switching element closure, first resistor is just and institute
The controllable first switching element for stating row is connected in parallel.Thus advantages below is obtained：Matrix circuit particularly simply and saves
It constructs with saving energy, because only when needing to avoid leakage current, i.e. only when matrix circuit is in operation and in light emitting diode
At least one manipulation carry out shine when just forward current is applied in light emitting diode.
Thus, it is preferable that at least one first resistor of each row is electrically connected with the corresponding supply line arranged.In order to incite somebody to action
The supply line and the controllable first switching element of corresponding row are connected in parallel, at least one first resistor
It can be electrically connected with described for electric connecting terminal.In other words, which means that the first connecting pin of at least one first resistor of a row
It is enduringly electrically connected with the supply line of the row and the second connection end of at least one first resistor is when needed for feed-in
Forward current and be electrically connected with matrix circuit for electric connecting terminal.Especially when the matrix circuit in operation and controllable
The second connection end of at least one first resistor is just connected to the first electricity during at least one of one switch element closure
On position or supply voltage.
In a kind of expansion scheme of the second matrix circuit according to the present invention, the supply lines of each row passes through corresponding
Difference one in the first resistor of row is electrically connected with the supply line of others row, wherein, the first resistor of a row
In one only when the controllable first switching element of at least one other row be closed and thus the first resistor with
It is described to be just connected in parallel with the controllable first switching element of the row when being connected for electric connecting terminal.In other words, which means that
The supply line of each row is electrically connected by the difference one in the first resistor that arranges accordingly with the supply lines of others row,
Wherein, each in the first resistor of a row is only when the supply line being connect with the first resistor of others row
Controllable first switching element be closed and first switching element that thus first resistor passes through other row
With it is described connect for electric connecting terminal when be just connected in parallel with the controllable first switching elements of the row.Therefore work as matrix circuit
In operation and the controllable first switching element of at least one row be closed when, thus respectively a first resistor with it is described
The controllable first switching element of others row is connected in parallel.Therefore first connecting pin of first resistor is electrically connected with supply line
It connects, and therefore second connection end is connected to by one of first switching element of another supply line on electric connecting terminal.Square
Therefore battle array circuit is particularly simply formed, because not needing to connect first resistor to for the individual behaviour on electric connecting terminal
Control.
Preferably, here, the difference Liang Ge supply lines of the matrix circuit are mutually interconnected by an exactly first resistor
It connects.It is if be therefore closed the first switching element of first row, first resistor is in parallel with the first switching element of secondary series
Connection.If the first switching element of secondary series be closed, by first resistor company in parallel with the first switching element of first row
It connects.The number of first resistor passes through formula k=n herein（n-1）/ 2 calculate, wherein, k is the number of first resistor, and n is
The number of the row of matrix circuit.It is thereby possible to reduce the number of resistance is and at the same time special energy efficient ground structural matrix circuit.
In a kind of expansion scheme according to the present invention, the first resistor is sized to so that from the confession
Electric connecting terminal flow to the light emitting diode by first resistor respectively and flow to described connect from the light emitting diode
The electric current of ground connecting pin is less than predetermined boundary value.In other words, which means that so selecting the resistance value of first resistor,
So that by not causing shining for light emitting diode, in other words, observation matrix from the electric current that first resistor is flowed through for electric connecting terminal
The user of circuit is optically imperceptible or almost imperceptible light emitting diode luminous.First resistor can for example be existed
Resistance value between 100 kilohms and one megohm.Boundary value may, for example, be 1 micromicroampere.Therefore electric current is used only for avoiding
Or prevent leakage current.
Be certified as advantageously, a second resistance be respectively provided with per a line, the second resistance in order to by electric current from
The supply line be directed to the grounding connection end and with the supply line of corresponding row and with the grounding connection end electricity
It connects and is therefore connected with the controllable second switch element in parallel of corresponding row.If such as it is configured as bipolar crystalline substance
The cut-off current of the controllable second switch element of body pipe is too low, respectively can be protected the current potential of cathode by the second resistance
It holds in the lower value of the current potential compared to anode.According to the embodiment, therefore the electric current applied by first resistor leads to respectively
It crosses the second resistance and flows to grounding connection end.Herein, it is preferable that the resistance value of first resistor compares the resistance value of second resistance
Bigger is identical.It may thereby be ensured that electric current passes through first resistor, light emitting diode from for electric connecting terminal in the forward direction
Grounding connection end is flowed to second resistance.
In addition, the present invention relates to a kind of display equipment for household electrical appliance, the display equipment has at least one
According to the matrix circuit of the present invention.The display equipment can for example be configured to seven-segment display or LED- displays.
Household electrical appliance according to the present invention include display equipment according to the present invention.Household electrical appliance can for example be configured as using
In the household electrical appliance of cleaning or dry washing material product, for example it is configured as washing machine or scrubbing-and-drying unit, is configured as preparing food
The household electrical appliance of product are for example configured as cooker or stove, are configured as household electrical appliance, such as configuration for preservation and preserved food products
It is combined for refrigerator, household freezer or refrigerating, is configured as cleaning the household electrical appliance of tableware, being for example configured as dish-washing machine, structure
Type is smoke exhaust ventilator or is configured as full-automatic coffee machine.
The preferred embodiment and its advantage proposed about matrix circuit according to the present invention correspondingly applies to basis
The display equipment of the present invention and household electrical appliance according to the present invention.
The other feature of the present invention is obtained by the description of claim, attached drawing and attached drawing.Previously mention in the description
All features and feature combination and mentioned in attached drawing description below and/or the feature shown separately in the drawings and spy
Sign combination with other combinations or can also can not only be applied with the combination that illustrates respectively and individually, and without departing from this
The range of invention.Therefore the present invention following implementation can also be considered as including and it is disclosed：The implementation is unknown in the accompanying drawings
It really shows and illustrates, but combined by the individual feature of the implementation by being illustrated and cause and can generate.Below implement and
Feature combination can also be considered as disclosed：The implementation and feature combine therefore and will without the original independent right write
All features asked.
Description of the drawings
Herein：
Fig. 1 shows a kind of schematic diagram of embodiment of household electrical appliance according to the present invention；
Fig. 2 shows the schematic diagrames of matrix circuit according to prior art；
Fig. 3 shows schematic diagram of the matrix circuit in the operating status of light emitting diode in Fig. 2；
Fig. 4 shows a kind of schematic diagram of embodiment of matrix circuit according to the present invention；
Fig. 5 shows the schematic diagram of the another embodiment of matrix circuit according to the present invention；With
Fig. 6 shows schematic diagram of the matrix circuit according to the present invention in the operating status of light emitting diode.
In the accompanying drawings, identical and identical function element is equipped with identical reference numeral.
Specific embodiment
Fig. 1 shows household electrical appliance 1 according to the present invention.Household electrical appliance 1 can for example be configured as washing for cleaning or drying
It washs the household electrical appliance of article, be for example configured as washing machine or scrubbing-and-drying unit, be configured as the household for preparation or mulling food
Electric appliance is for example configured as cooker or stove, be configured as the household electrical appliance of preservation and preserved food products, being for example configured as refrigerator,
Household freezer or refrigerating combination, are configured as, for cleaning the household electrical appliance of tableware, being for example configured as dish-washing machine, being configured as pumping
Smoke machine is configured as full-automatic coffee machine.Household electrical appliance 1 have display equipment 2, and the display equipment is for example for for household
The user being not shown on this of electric appliance 1 shows information.Display equipment 2 can for example be configured to seven-segment display.Display equipment 2 has
There is matrix circuit 3.
The matrix circuit 3' being known from the state of the art is shown in FIG. 2.Matrix circuit 3' has herein there are three row S1,
S2, S3 and three rows Z1, Z2, Z3.In addition, matrix circuit 3' has nine light emitting diode D1 to D9 herein, wherein, difference three
A light emitting diode D1 to D9 is arranged in row a S1, S2, S3 and three light emitting diode D1 to D9 are arranged in a row
In Z1, Z2, Z3.Here, in each row S1, in S2, S3, the anode A of light emitting diode D1 to D9 passes through a supply lines respectively
Road LS is electrically connected, and in every a line Z1, Z2, Z3, and the cathode K of light emitting diode D1 to D9 passes through a supply line respectively
LZ is connected with each other.
In addition, each in row S1, S2, S3 is respectively provided with a controllable first switching element 4, described first opens
S1 will be arranged accordingly by closing element 4, and the confession electric connecting terminal 5 of the supply line LS and matrix circuit 3' of S2, S3 are electrically connected and/or by phases
The supply line LS of the row S1, S2, S3 that answer are detached with for electric connecting terminal 5.It is located at the first current potential VCC such as 5V for electric connecting terminal 5
On.In addition, each in row Z1, Z2, Z3 is respectively provided with a controllable second switch element 6, the second switch member
By corresponding row Z1, supply line LZ and the grounding connection end 7 of matrix circuit 3' of Z2, Z3 connect and/or by corresponding rows part 6
The supply line LZ of Z1, Z2, Z3 are detached with grounding connection end 7.Grounding connection end 7 has smaller compared to the first current potential VCC the
Two current potentials.Second current potential is herein the reference potential of matrix circuit 3' and can be such as 0V.The supply lines of row Z1, Z2, Z3
Road LZ is electrically connected respectively by a resistance RZ with controllable second switch element 6.
Fig. 3 shows a partial sector of the matrix circuit 3' in Fig. 2, wherein, light emitting diode D1 is in operation.This meaning
Taste, and light emitting diode D1 is steered to emit light and be supplied with electric energy.In order to manipulate light emitting diode D1, by first row
The controllable first switching element 4 of S1 is closed, thus by the supply line LS of first row S1 with therefore light emitting diode D1's
Anode A is electrically connected with for electric connecting terminal 5.In addition, the controllable second switch element 6 of the first row Z1 is closed, so as to by the
The supply line LZ of a line Z1 and therefore the cathode K of light emitting diode D1 is electrically connected with grounding connection end 7.Controllable first He
Second switch element 4,6 can for example be configured with the bipolar transistor 8 of base stage B, emitter E and collector C.By sending out
The potential difference generated between the anode A of optical diode D1 and cathode K, electric current 9, i.e. before to light stream
（Vorwaertsleuchtstrom）It flows through light emitting diode D1 and makes the lumination of light emitting diode.
It is similarly positioned in first row S1 by light emitting diode D2, by the controllable first switch for being closed first row S1
The anode A of light emitting diode D2 is also electrically connected by element 4 with for electric connecting terminal 5.It is located at and luminous two by light emitting diode D4
In row Z1 identical pole pipe D1, by being closed controllable second switch element 6 also by the cathode K of light emitting diode D4 and ground connection
Connecting pin 7 is electrically connected.Small forward current 10 flows through light emitting diode D2 and D4 as a result,.Pass through light emitting diode D3 and D4
Anode A is located on identical current potential and the cathode K of light emitting diode D2 and D3 are located on identical current potential, light emitting diode D3
In inverted running or cut-off operation, and small leakage current 11 or cut-off current flow through light emitting diode D3.The leakage current
Or cut-off current may damage or destroy light emitting diode D3.In addition, the here, position that small cut-off current 12 passes through the second row Z2
It is flowed up in ending running bipolar transistor 8 in the side at grounding connection end 7.
Fig. 4 shows a kind of embodiment of matrix circuit 3 according to the present invention, can prevent from leaking electricity by the matrix circuit
Stream 11 reverses current through light emitting diode D1 to D9.It shows there, each row S1, S2, S3 are respectively provided with one first
Resistance R1, the first resistor and the corresponding controllable first switching element 4 of affiliated row S1, S2, S3 are connected in parallel.For
This, in each row S1, S2, S3, the supply line LS of first resistor R1 and corresponding row S1, S2, S3 and with for being electrically connected
5 electrical connection of end.First resistor R1 especially high-ohmic resistances, such as with the electricity between 100 kilohms and one megohm
Resistance value.By first resistor R1 by the anode A of diode D1 to D9 it is particularly lasting be connected on supply voltage VCC.Luminous two
The anode A of pole pipe D1 to D9 is maintained at higher electricity based on the small cut-off current 12 by bipolar transistor 8 compared to cathode K
On position.By first resistor R1, in the state of the disconnection of controllable first switching element 4, also by electric current from for being electrically connected
End 5 is fed by first resistor R1 in corresponding supply line LS.The electric current is electric current in the forward direction, so as to make
There is light emitting diode D1 to D9 enduringly to run in the forward direction.The size of first resistor R1 so determines herein so that logical
It crosses and flows through the electric current of light emitting diode D1 to D9 corresponding light emitting diode D1 is not caused to shine to D9 or does not lead to light-emitting diodes
The optically perceptible of pipe D1 to D9 shines.The leakage of the light emitting diode run up in cut-off side should only be avoided passing through
Electric current.The lasting application of forward current can be realized by particularly simple mode using a small amount of resistance R1.
In addition, here, per a line Z1, Z2, Z3 have second resistance R2, the second resistance and corresponding row Z1, Z2, Z3
Controllable second switch element 6 be connected in parallel.Second resistance R2 and corresponding row Z1, the supply line LZ of Z2, Z3 and
It is connect with grounding connection end 7.It, can be by luminous two by second resistance R2 if the cut-off current 12 of bipolar transistor 8 is too low
The cathode K of pole pipe D1 to D9 is maintained at compared to anode A on lower current potential.By second resistance R2, applied by first resistor R1
The electric current added can flow away on the direction at grounding connection end 7.
Fig. 5 shows the another embodiment of matrix circuit 3 according to the present invention.Here, S1 is each arranged, the confession of S2, S3
Electric line LS passes through a first resistor R1 and other row S1, the supply line LS connections of S2, S3 respectively.Here, two row S1,
The difference Liang Ge supply line LS of S2, S3 pass through a first resistor R1 electrical connection respectively.Therefore, the first of first resistor R1 connects
Connect that end is electrically connected with one in supply line LS and the second connection end of first resistor R1 passes through controllable first switch
One of element 4 with for electric connecting terminal 5 can be electrically connected and therefore with the supply line LS being connect with the first connecting pin can
The first switching element 4 of control can be connected in parallel.
If it is closed the controllable first switching element 4 of such as first row S1, the supply lines with first row S1 now
It road LS and is opened with the first resistor R1 that the supply line LS of secondary series S2 is connect and the first of the controllable disconnection of secondary series S2
Element 4 is closed to be connected in parallel.With the supply line LS of first row S1 and the first resistor being connect with the supply line LS of third row S3
R1 and the first switching element 4 of the controllable disconnection of third row S3 are connected in parallel.Second and third row S2, S3 disconnection can
Therefore the first switching element 4 of control is bridged.As a result, by supplying electric connecting terminal 5 by being connected to supply on electric connecting terminal 5 first
Apply electric current in the supply line LS of resistance R1 nematics S2 and S3, which, which flows through, is arranged in that light emitting diode D4, D5,
D3, D6, D8, D7.Advantages below is obtained by the embodiment：Electric current not enduringly flows through light emitting diode D1 to D9, but
It is only such when arranging at least one of S1, the controllable first switching element 4 of S2, S3 closures.In other words, only when matrix electricity
Road 3 in operation when, electric current flows.
Fig. 6 is shown in light emitting diode D1 matrix circuits 3 according to the present invention in operation and in the case of shining
A kind of embodiment.Be electrically connected by first resistor R1 with for electric connecting terminal 5, from for electric connecting terminal 5 by resistance R1 to second
It arranges and applies electric current 13 in the supply line LS of S2, so as to which small forward current 10 equally flows through light emitting diode D3.Therefore pass through
Applying electric current 13 makes light emitting diode D3 run in the forward direction.The electricity that will be flowed away by second resistance R2 from supply line LZ
Stream 14 draws away grounding connection end 7.Therefore it shows, no cut-off current flows through one of light emitting diode D1 to D9.
Reference numerals list
1 household electrical appliance
2 display equipment
3', 3 matrix circuits
4 controllable first switching elements
5 supply electric connecting terminal
6 controllable second switch elements
7 grounding connection ends
8 bipolar transistors
9,10,11,12,13,14 electric currents
The first current potentials of VCC
D1, D2, D3, D4, D5 light emitting diode
D6, D7, D8, D9
A anodes
K cathodes
R1, R2, RZ resistance
LS, LZ supply line
S1, S2, S3 are arranged
Z1, Z2, Z3 row
B base stages
E emitters
C collectors.
Claims (10)
1. for household electrical appliance（1）Display equipment（2）Matrix circuit（3）, the matrix circuit is with predetermined number
Purpose arrangement is expert at（Z1, Z2, Z3）And row（S1, S2, S3）In light emitting diode（D1 to D9）, wherein, in every a line（Z1,
Z2, Z3）In, the light emitting diode（D1 to D9）Cathode（K）Pass through supply line（LZ）Electrical connection, and in each row
（S1, S2, S3）In, the light emitting diode（D1 to D9）Anode（A）Pass through supply line（LS）Electrical connection, and wherein,
Each row（S1, S2, S3）Respectively include a controllable first switching element（4）For switching in corresponding supply line
（LS）With the matrix circuit（3）Supply electric connecting terminal（5）Between be conductively connected, it is described for electric connecting terminal have the first current potential
（VCC）, and per a line（Z1, Z2, Z3）Respectively include a controllable second switch element（6）It is corresponding for switching in
Supply line（LZ）With the matrix circuit（3）Grounding connection end（7）Between be conductively connected, the grounding connection end has
Compared to first current potential（VCC）Smaller second current potential,
It is characterized in that,
The matrix circuit（3）For each row（S1, S2, S3）It is respectively provided with a first resistor（R1）, in order to by the phase
The supply line answered（LS）With the matrix circuit（3）Supply electric connecting terminal（5）It is electrically connected and in order to by electric current（13）From institute
It states for electric connecting terminal（5）It is fed into the supply line（LS）In, the first resistor and corresponding row（S1, S2, S3）Can
The first switching element of control（4）It is connected in parallel.
2. for household electrical appliance（1）Display equipment（2）Matrix circuit（3）, the matrix circuit is with predetermined number
Purpose arrangement is expert at（Z1, Z2, Z3）And row（S1, S2, S3）In light emitting diode（D1 to D9）, wherein, in every a line（Z1,
Z2, Z3）In, the light emitting diode（D1 to D9）Cathode（K）Pass through supply line（LZ）Electrical connection, and in each row
（S1, S2, S3）In, the light emitting diode（D1 to D9）Anode（A）Pass through supply line（LS）Electrical connection, and wherein,
Each row（S1, S2, S3）Respectively include a controllable first switching element（4）For switching in corresponding supply line
（LS）With the matrix circuit（3）Supply electric connecting terminal（5）Between be conductively connected, it is described for electric connecting terminal have the first current potential
（VCC）, and per a line（Z1, Z2, Z3）Respectively include a controllable second switch element（6）It is corresponding for switching in
Supply line（LZ）With the matrix circuit（3）Grounding connection end（7）Between be conductively connected, the grounding connection end has
Compared to first current potential（VCC）Smaller second current potential,
It is characterized in that,
The matrix circuit（3）For each row（S1, S2, S3）With at least one first resistor（R1）, in order to by the phase
The supply line answered（LS）With the matrix circuit（3）Supply electric connecting terminal（5）It is electrically connected and in order to by electric current（13）From institute
It states for electric connecting terminal（5）It is fed into the supply line（LS）In, at least one first resistor can be with corresponding row（S1,
S2, S3）Controllable first switching element（4）It is connected in parallel.
3. matrix circuit according to claim 2（3）,
It is characterized in that,
Each row（S1, S2, S3）At least one first resistor（R1）With corresponding row（S1, S2, S3）Supply line
（LS）It is electrically connected and in order to by the supply line（LS）With corresponding row（S1, S2, S3）Controllable first open
Close element（4）It is connected in parallel and electric connecting terminal can be supplied with described（5）Electrical connection.
4. the matrix circuit according to Claims 2 or 3（3）,
It is characterized in that,
Each row（S1, S2, S3）Supply line（LS）By arranging accordingly（S1, S2, S3）First resistor（R1）In point
Other one arranges with other（S1, S2, S3）Supply line（LS）Electrical connection, wherein, a row（S1, S2, S3）First electricity
Resistance（R1）In one only when at least one other row（S1, S2, S3）Controllable first switching element（4）Be closed and by
This first resistor（R1）Electric connecting terminal is supplied with described（5）Ability and the row during connection（S1, S2, S3）Controllable first switch
Element（4）It is connected in parallel.
5. matrix circuit according to claim 4（3）,
It is characterized in that,
The matrix circuit（3）Difference Liang Ge supply lines（LS）Pass through an exactly first resistor（R1）It is connected with each other.
6. matrix circuit according to any one of the preceding claims（3）,
It is characterized in that,
The first resistor（R1）Be sized to so that from it is described supply electric connecting terminal（5）Pass through first resistor respectively
（R1）To the light emitting diode（D1 to D9）And from the light emitting diode（D1 to D9）To the grounding connection end（7）Stream
Dynamic electric current is less than predetermined boundary value.
7. matrix circuit according to any one of the preceding claims（3）,
It is characterized in that,
Per a line（Z1, Z2, Z3）It is respectively provided with a second resistance（R2）, the second resistance is in order to by electric current（14）From described
Supply line（LZ）It is directed to the grounding connection end（7）And with corresponding row（Z1, Z2, Z3）Supply line（LZ）And with
The grounding connection end（7）Be electrically connected and therefore with corresponding row（Z1, Z2, Z3）The controllable second switch element
（6）It is connected in parallel.
8. matrix circuit according to any one of the preceding claims（3）,
It is characterized in that,
Controllable first and second switch element（4,6）It is configured to bipolar transistor（8）.
9. for household electrical appliance（1）Display equipment（2）, the display equipment is with according to any one of the preceding claims institute
The matrix circuit stated（3）.
10. household electrical appliance（1）, with display equipment according to claim 9（2）.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015219490.6 | 2015-10-08 | ||
| DE102015219490.6A DE102015219490A1 (en) | 2015-10-08 | 2015-10-08 | Matrix circuit for a display device of a household appliance, display device and household appliance |
| PCT/EP2016/072186 WO2017060068A1 (en) | 2015-10-08 | 2016-09-19 | Matrix circuit for a display device of a domestic appliance, display device, and domestic appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108140349A true CN108140349A (en) | 2018-06-08 |
| CN108140349B CN108140349B (en) | 2021-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680058425.5A Active CN108140349B (en) | 2015-10-08 | 2016-09-19 | Matrix circuit for a display device of a household appliance, display device and household appliance |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3360126B1 (en) |
| CN (1) | CN108140349B (en) |
| DE (1) | DE102015219490A1 (en) |
| WO (1) | WO2017060068A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3360126A1 (en) | 2018-08-15 |
| EP3360126B1 (en) | 2019-08-07 |
| WO2017060068A1 (en) | 2017-04-13 |
| CN108140349B (en) | 2021-01-08 |
| DE102015219490A1 (en) | 2017-04-13 |
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