CN102723055A - LED display panel, system and equipment - Google Patents
LED display panel, system and equipment Download PDFInfo
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- CN102723055A CN102723055A CN2012101790041A CN201210179004A CN102723055A CN 102723055 A CN102723055 A CN 102723055A CN 2012101790041 A CN2012101790041 A CN 2012101790041A CN 201210179004 A CN201210179004 A CN 201210179004A CN 102723055 A CN102723055 A CN 102723055A
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Abstract
The invention provides an LED display panel, system and equipment, which are applicable to the field of LED display. Two LED lamps connected with each other in parallel in a phase reversal way are connected between at least two ports of the LED display panel. By using the LED display panel provided by the embodiment of the invention, a row wire and a line wire are shared, so that the port utilization rate can be increased and the pin number of the display panel is reduced.
Description
Technical field
The invention belongs to LED and show the field, relate in particular to a kind of LED display panel, system and equipment.
Background technology
Light emitting diode (Light Emitting Diode; LED) be widely used in multiple occasion as the energy-saving and emission-reduction product, for example little LED panel fields such as electronic scale, table scale, electromagnetic oven, electric heater, air-conditioning, micro-wave oven, washing machine, STB, DVB-S, DVB-T, DVB-C, network machine top box, DTV STB.
The display area of little LED panel is less, and content is less, and the most key parameter request of large LED display panels such as color, refresh rate is lower, but to as how the most reasonably type of drive, optimum cost mode are had relatively high expectations.
What existing LED displaying panel driving method adopted is that ranks separately drive, the mode of scanning constant.As shown in Figure 1, be the LED display panel in the empty frame, form by a plurality of LED lamp lattice arrays.Receive the scanning end with the anode of each LED lamp, it is example that negative electrode is received the data switch end.
Existing LED displaying panel driving method adopts line scanning, and the mode of column selection property switch perhaps adopts column scan, the mode of row selective switch, and each LED in the array controls separately effectively.With column scan; The mode of row selective switch is an example; When port is held in certain scanning in elected (these row NMOS that is about to choose among GRID (the 1) ~ GRID (M) among Fig. 1 manages conducting); These row LED lamp cathode of choosing is all received ground, and the data switch port is optionally opened or closed these row LED lamp, realizes the independent control to the LED lamp.
For example select the LED lamp that SEG (2), SEG (N) locate in GRID (2) row to light, all the other LED of these row close, and then just with the PMOS conducting of SEG (2), SEG (N), all the other PMOS pipes are closed.Select next line LED lamp then.A scan period finishes, and the displaying contents of LED display panel is accomplished, and is reciprocal with this, obtains the lasting demonstration of whole LED display panel.If, get final product through the PMOS switch situation of revising the data switch port to the displaying contents change.
According to above-mentioned knowledge, existing LED display panel is through after integrated, if N*M LED lamp lattice array arranged, then the number of pins of display panel is that (N+M) is individual.
Special, in the LED display panel applications, major part is to adopt eight sections charactrons or seven segment digital tubes.Single 8 sections charactrons are as shown in Figure 2, and single 7 sections charactrons are as shown in Figure 3, and a plurality of 8 sections charactrons are as shown in Figure 4.The internal circuit of 8 sections charactrons such as Fig. 5 and shown in Figure 6, a certain utmost point of each LED lamp and other extremely shared.
The type of drive of such integrated charactron generally is to be that unit drives with single multistage charactron, like Fig. 4, and the forming of this integrated charactron by 68 segment encodes; To be total to anode is example; Each independently the corresponding port of anode of multistage charactron shared (first lamp anode of 68 segment encodes is shared, and second lamp anode is shared ...; The 8th lamp anode is shared), each independently the negative electrode of multistage charactron independently draw.Like this, the pin number of this integrated charactron is 8+6=14.
Therefore, the number of pin of existing integrated multistage charactron is determined by 2 parts: wherein a part is the separate port number of independent multistage charactron, and for example 8 segment encodes have 8, and 7 segment encodes have 7; A part is the number by the multistage charactron in addition, for example 6 among Fig. 6.If by integrated multistage charactron is that 10 8 segment encodes are formed, the number of pin that then needs is 8+10=18.
From the above, the number of pins of existing integrated LED display panel is more, and the port utilization ratio is low.
Summary of the invention
The embodiment of the invention provides a kind of LED display panel, and it is more to be intended to solve the number of pin that has the LED display panel now, the problem that port utilization ratio is low.
The embodiment of the invention is achieved in that a kind of LED display panel, is connected with the LED lamp of 2 parallel connected in reverse phase at least between 2 ports of said LED display panel.
The embodiment of the invention also provides a kind of LED display system, and said LED display system comprises above-mentioned LED display panel.
The embodiment of the invention also provides a kind of electronic equipment, and said electronic equipment comprises above-mentioned LED display system.
LED display panel in the embodiment of the invention is shared with column rule and alignment, can improve port utilization ratio, reduces the number of pin of display panel.
Description of drawings
Fig. 1 is the structural representation of LED display panel in the prior art;
Fig. 2 is that 8 segment encode LED lamp lattice arrays show synoptic diagram in the prior art;
Fig. 3 is that 7 segment encode LED lamp lattice arrays show synoptic diagram in the prior art;
Fig. 4 is that a plurality of 8 segment encode LED lamp lattice arrays show synoptic diagram in the prior art;
Fig. 5 is that the circuit during 8 segment encode LED lamp lattice array common cathode connects synoptic diagram in the prior art;
Fig. 6 is that the circuit during 8 segment encode LED lamp lattice array common anode connects synoptic diagram in the prior art;
Fig. 7 is the structural representation of the LED display panel that provides of the embodiment of the invention;
Fig. 8 is the structural representation of the LED display panel that provides of another embodiment of the present invention;
Fig. 9 is the LED display panel structure synoptic diagram of the N that provides of the embodiment of the invention 8 segment encode;
Figure 10 is the structural representation of the LED display panel that provides of further embodiment of this invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In embodiments of the present invention, the ranks line of LED display panel is shared, and, can improve port utilization ratio with the LED lamp short circuit of ranks line numbering same position.
Fig. 7 shows the structure of the LED display panel that the embodiment of the invention provides, and for the ease of explanation, only shows the part relevant with the embodiment of the invention.
This LED display panel comprises LED lamp lattice array, and the line between the LED lamp, and column rule and alignment are shared, is connected with the LED lamp of 2 parallel connected in reverse phase at least between the LED lamp short circuit of ranks line numbering same position, 2 ports.For example LED1, LED2 parallel connected in reverse phase are meant that the anode of LED1 connects the negative electrode of LED2, and the negative electrode of LED1 connects the anode of LED2.
As one embodiment of the present of invention, per 2 ports in the some or all of port of LED display panel all are connected with the LED lamp of 2 parallel connected in reverse phase.
Each port of this LED display panel is independent, does not directly link to each other.Wherein, certain port of this LED display panel is connected to the anode of all LED lamps of corresponding row, also is connected to the negative electrode of all LED lamps of respective column simultaneously.
As one embodiment of the present of invention; This LED display panel can be to be formed by connecting through line the LED individual devices; Also can be the LED array of display with whole LED individual devices, also can be a plurality of with partial L ED individual devices, the LED array of display that connects through line again.
In embodiments of the present invention, the LED display panel is with the LED lamp, and the integrated packaging body of the connecting line between the LED lamp.
In embodiments of the present invention, shared if the LED display panel has K port through the ranks line, and the LED lamp short circuit of the correspondence position that ranks line numbering is identical, can realize the individual LED dot matrix of K* (K-1) at most, K is a natural number.
In embodiments of the present invention, confirm the corresponding relation of row, row for ease, for the LED lamp lattice array of the capable N row of M (or the capable M row of N), M, N are natural number, and be shared through column rule and alignment:
If M=N, the port number of LED display panel be (M, N)
MAX+ 1;
If M ≠ N, the port number of LED display panel be (M, N)
MAX
Fig. 8 shows the structural representation of the LED display panel that another embodiment of the present invention provides, and all of the port of this LED display panel is divided into 2 types (port a class and port b classes).The port of every type of inside does not have the LED lamp of 2 parallel connected in reverse phase to connect between per 2 ports.There is the LED lamp of 2 parallel connected in reverse phase to be connected between the arbitrary port of port a class and the arbitrary port of port b class.
In embodiments of the present invention, the LED display panel has n k segment encode, with independently altogether anode or common cathode k section charactron be unit, and each charactron or LED can operate simultaneously in each k section charactron, form the LED lamp lattice array of k*n;
When 1≤n≤k, the LED display panel has k+1 port;
As n>during k, the LED display panel has n port;
N, k are natural number.
For example if be unit with 8 segment encodes, then the LED lamp number that connects of column rule or alignment is at least 8, so at least 9 column rules or alignment; With 7 segment encodes is unit, and the LED lamp number that then connects on column rule or the alignment is at least 7, so at least 8 alignments or column rule.
Like this, the LED display panel of n 8 segment encodes being arranged, be unit if require independently to be total to anode or 8 sections charactrons of common cathode, and each charactron (or LED) can be operated simultaneously in each 8 sections charactron, and is then shown in figure 10:
When 1≤n≤8, this LED display panel needs 9 ports;
As n>8 the time, this LED display panel needs n port.
For the LED display panel of n 7 segment encodes, if require with independently altogether anode or 7 sections charactrons of common cathode be unit, and each charactron or LED can operate simultaneously in each 7 sections charactron, then:
When 1≤n≤7, this LED display panel needs 8 ports;
As n>7 the time, this LED display panel needs n port.
N is a natural number.
If with altogether anode or common cathode k section charactron is unit, and each charactron (or LED) can be operated simultaneously in each k section charactron, and the number of the k section charactron that can operate simultaneously is m, then:
The port number of LED display panel is km+1, and k segment encode most number is (km+1) * m, and the LED lamp point number of LED display panel is (km+1) * km;
Wherein, k, m are natural number.
For example, for 8 segment encodes, the port number of this LED display panel is 8m+1, and 8 segment encode most number are (8m+1) * m, and the LED lamp point number of this LED display panel is (8m+1) * 8m.
For 7 segment encodes, the port number of this LED display panel is 7m+1, and 7 segment encode most number are (7m+1) * m, and the LED lamp point number of this LED display panel is (7m+1) * 7m.
Below through concrete embodiment realization of the present invention is elaborated.
Embodiment 1:
Suppose 1 LED display panel that 6 ports are arranged, according to existing control mode, the ranks line separately has following several kinds of array modes:
| Row (perhaps row) | Row (perhaps going) | LED |
| 1 | 5 | 5 |
| 2 | 4 | 8 |
| 3 | 3 | 9 |
| 4 | 2 | 8 |
| 5 | 1 | 5 |
This shows that existing LED display panel drives 9 LED lamp points at most.
The ranks line is shared, as shown in Figure 7, have 6 row, 6 row, but have a LED lamp point position consistent in every row or the row because of column rule, alignment signal, institute thinks long going out.With this lamp point position short circuit, the LED lamp point number of the LED display panel that then obtains altogether is 6*6-6=30.
This shows that be fixed as at port under 6 the situation, existing LED panel only can drive 9 LED lamp points, and adopts the method for the embodiment of the invention can drive 30 lamp points, has greatly promoted port utilization ratio.
Suppose to realize the LED dot matrix of one 10 row 6 row (60 lamp points), according to existing control mode, the LED display panel needs 10+6=16 port.
In embodiments of the present invention, if port utilization ratio is accomplished the highest, can be only with 9 ports because 9 ports can drive 9*8=72 independently lamp point, greater than 60.
The corresponding relation of row, row adopts row, the multiplexing method of alignment for ease, under the unequal situation of the column number of being expert at, can LED display panel port number be set to (M, N)
MAXIn the present embodiment, column rule quantity (10) is greater than alignment quantity (6), and the port of this LED display panel is set to 10.
Connect from circuit, this LED lamp dot matrix is shown 10 row, 7 row.But in 7 row, there is not the LED lamp on the point that ranks connect, so every row has 6 LED lamps; All the other 3 row are because need not the ranks short circuit; So the LED of this place lamp can be controlled separately, but consider that LED panel columns is consistent, so can any 1 the LED lamp in all the other 3 row be removed.Like this, during this circuit connected, every row had 6 LED lamps, had 10 row, had realized the purpose of 10 port driver 10 row 6 row (60 lamp points) LED dot matrix.
Suppose to realize that 1 LED display panel that comprises 48 segment encodes (is equivalent to 4 row, 8 row; The perhaps LED display panel of 8 row 4 row); If do not require that each charactron (or LED) can be operated simultaneously in each 8 sections charactron; Then according in the foregoing description 2, available 8 ports are realized above-mentioned LED display panel.But according to foregoing description, in a complete display cycle, divide and light for 8 times, light 4 LED lamps at every turn, perhaps divide and light for 5 times, wherein light 7 lamps for 4 times, 4 lamps are lighted in another time.
Special, if with independently altogether anode or 8 sections charactrons of common cathode be unit, and each charactron (or LED) can be operated simultaneously in each 8 sections charactron; Promptly need be in a complete display cycle; At any one time, all be that 8 LED lamps are operated simultaneously, the LED display panel of 48 segment encodes; Need to divide and light for 4 times, light 8 LED lamps at every turn.
In embodiments of the present invention, above-mentioned LED display panel is assumed to 4 row, 8 row, then as among Fig. 9, the LED lamp number that every row connects is at least 8, so in circuit connects, need 9 alignments.In elected during certain delegation, need through not with the alignment operation (low level or high-impedance state) of this row short circuit, light or do not work to control 8 LED lamps of this row.
Embodiment 4
Suppose to realize that 1 LED display panel that comprises 10 8 segment encodes (is equivalent to 10 row, 8 row; The perhaps LED display panel of 8 row 10 row); If do not require that each charactron (or LED) can be operated simultaneously in each 8 sections charactron; Then according among the embodiment 2, available 10 ports are realized above-mentioned LED display panel.
If this LED display panel adopts 10 ports, because can guarantee the circuit connecting mode of 10 row, 9 row, thus can guarantee that independently to be total to anode or 8 sections charactrons of common cathode be unit, and 8 LED lamps can be operated simultaneously in each 8 sections charactron.
So just can use 10 ports, under the situation that 8 LED lamps can be operated simultaneously in guaranteeing each 8 segment encode, drive the LED display panel that comprises 10 8 segment encodes.
Embodiment 5
If to be total to anode or common cathode k section charactron is unit, and each charactron (or LED) can be operated simultaneously in each k section charactron, and the number of the k section charactron that can operate simultaneously is m.So:
For 8 segment encodes, the port number of this LED display panel is 8m+1, and 8 segment encode most number are (8m+1) * m, and the LED lamp point number of this LED display panel is (8m+1) * 8m.
For 7 segment encodes, the port number of this LED display panel is: 7m+1, and 7 segment encode most number are (7m+1) * m, the LED lamp point number of this LED display panel is (7m+1) * 7m.
For example, realize 1 LED display panel that comprises 32 8 segment encodes, adopt the mode of operating 28 sections charactrons simultaneously, i.e. m=2.So:
The port number of this LED display panel is 8m+1=17, and 8 segment encode most number are (8m+1) * m=34, and the LED lamp point number of this LED display panel is (8m+1) * 8m==272.
LED display panel in the embodiment of the invention can be widely used in various LED applications; Especially little LED panel field is for example in the display system of equipment such as electronic scale, table scale, electromagnetic oven, electric heater, air-conditioning, micro-wave oven, washing machine, STB, DVB-S, DVB-T, DVB-C, network machine top box, DTV STB.
LED display panel in the embodiment of the invention and drive unit can be the LED display system.
LED display panel in the embodiment of the invention is shared with column rule and alignment, can improve port utilization ratio, reduces the number of pin of display panel.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a LED display panel is characterized in that, is connected with the LED lamp of 2 parallel connected in reverse phase at least between 2 ports of said LED display panel.
2. LED display panel as claimed in claim 1 is characterized in that, per 2 ports in the some or all of port of said LED display panel all are connected with the LED lamp of 2 parallel connected in reverse phase.
3. according to claim 1 or claim 2 LED display panel is characterized in that the port of said LED display panel comprises the first kind port and second generic port;
The LED lamp that does not have 2 parallel connected in reverse phase between the port of said first kind port and second generic port inside is connected;
There is the LED lamp of 2 parallel connected in reverse phase to be connected between the arbitrary port of the arbitrary port of said first kind port and second generic port.
4. according to claim 1 or claim 2 LED display panel is characterized in that, said LED display panel has that M is capable, N row LED lamp lattice array;
If M=N, the port number of said LED display panel be (M, N)
MAX+ 1;
If M ≠ N, the port number of said LED display panel be (M, N)
MAX
M, N are natural number.
5. according to claim 1 or claim 2 LED display panel; It is characterized in that said LED display panel has n k segment encode, so that independently anode or common cathode k section charactron are unit altogether; And each charactron or LED can operate simultaneously in each k section charactron, form the LED lamp lattice array of k*n;
When 1≤n≤k, said LED display panel has k+1 port;
As n>during k, said LED display panel has n port;
N, k are natural number.
6. according to claim 1 or claim 2 LED display panel is characterized in that, is unit with anode or common cathode k section charactron altogether, and each charactron or LED can operate simultaneously in each k section charactron, and the number of the k section charactron that can operate simultaneously is m:
The port number of said LED display panel is km+1, and k segment encode most number is (km+1) * m, and the LED lamp point number of said LED display panel is (km+1) * km;
Wherein, k, m are natural number.
7. according to claim 1 or claim 2 LED display panel is characterized in that said LED display panel is with the LED lamp, and the integrated packaging body of the connecting line between the LED lamp.
8. a LED display system is characterized in that, said LED display system comprises the described LED display panel of claim 1.
9. an electronic equipment is characterized in that, said electronic equipment comprises the described LED display system of claim 8.
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| CN201210179004.1A CN102723055B (en) | 2012-06-01 | 2012-06-01 | LED display panel, system and equipment |
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| CN201210179004.1A CN102723055B (en) | 2012-06-01 | 2012-06-01 | LED display panel, system and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104008708A (en) * | 2014-06-13 | 2014-08-27 | 福州福大海矽微电子有限公司 | Common cathode and common anode compositely-packaged digital tube and control method thereof |
| CN106601186A (en) * | 2017-02-15 | 2017-04-26 | 利亚德光电股份有限公司 | LED display optimization circuit |
| CN107346642A (en) * | 2017-07-26 | 2017-11-14 | 江门吉华光电精密有限公司 | Dot matrix charactron |
| CN108735137A (en) * | 2017-06-07 | 2018-11-02 | 浙江苏泊尔家电制造有限公司 | Circuit system and cooking apparatus for household electrical appliances display screen |
| CN114267305A (en) * | 2021-12-31 | 2022-04-01 | 广东美的厨房电器制造有限公司 | Integrated control chip and electronic device |
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|---|---|
| CN102723055B (en) | 2015-06-24 |
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