CN218631336U - Display screen protection circuit and display screen control system - Google Patents
Display screen protection circuit and display screen control system Download PDFInfo
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- CN218631336U CN218631336U CN202222535705.6U CN202222535705U CN218631336U CN 218631336 U CN218631336 U CN 218631336U CN 202222535705 U CN202222535705 U CN 202222535705U CN 218631336 U CN218631336 U CN 218631336U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The utility model provides a display screen protection circuit and display screen control system relates to display screen technical field, and this display screen protection circuit includes: the LED lamp comprises a common cathode LED lamp group, a filter circuit, a column driving chip circuit and at least two column protection diodes which are arranged in a matrix manner; the cathode of each row of LEDs in the LED lamp group is connected with the anode of one row of protection diodes, and the cathode is connected with the row driving chip circuit; the negative electrode of the column protection diode is connected with the positive voltage output end of the power supply module, and the negative electrode of the column protection diode is grounded through the filter circuit. The utility model provides a technical scheme has realized preventing electrostatic protection of LED display screen, can protect the LED of display screen and LED's driver chip.
Description
Technical Field
The utility model relates to a display screen technical field especially relates to a display screen protection circuit and display screen control system.
Background
A Light-Emitting Diode (LED) display screen is an electronic display screen composed of LED lattices, and can be used to display various information such as text, images, and videos.
Electrostatic Discharge (ESD) refers to the transfer of charge caused by objects having different Electrostatic potentials coming into close proximity or direct contact with each other. For the LED display screen, the charge transfer easily causes damage to the LED display screen, for example, the LED lamp bead or the driving chip can be damaged, so that the display of the LED display screen is abnormal.
SUMMERY OF THE UTILITY MODEL
The utility model provides a display screen protection circuit and display screen control system for LED display screen receives ESD easily and influences and show unusual problem among the solution prior art, realizes preventing electrostatic protection of LED display screen.
According to a first aspect of the present invention, there is provided a display screen protection circuit, comprising a common cathode Light Emitting Diode (LED) lamp set arranged in a matrix, a filter circuit, a column driving chip circuit, and at least two column protection diodes;
the cathode of each column of LEDs in the LED lamp set is connected with the anode of one column of protection diodes, and the cathode is connected with the column driving chip circuit;
the negative electrode of the column protection diode is connected with the positive voltage output end of the power supply module, and the negative electrode of the column protection diode is grounded through the filter circuit.
According to the utility model provides a pair of display screen protection circuit, filter circuit is high pass filter circuit.
According to the utility model provides a display screen protection circuit, filter circuit includes at least one filter capacitor;
and one end of the at least one filter capacitor after being connected in parallel is connected with the cathode of the column protection diode, and the other end of the at least one filter capacitor is grounded.
According to the utility model provides a display screen protection circuit, the row driver chip circuit includes at least one first data output end; one first data output end of the column driving chip circuit is connected with the cathode of one column of LEDs of the LED lamp bank;
the column driving chip circuit is used for providing driving signals in the column line direction for a column of LEDs connected with the first data output end through the first data output end.
According to the utility model provides a display screen protection circuit, also include the line driver chip circuit;
and the anode of each row of LEDs in the LED lamp set is connected with the row driving chip circuit.
According to the utility model provides a display screen protection circuit, still include two at least line protection diodes;
the anode of each line of LEDs in the LED lamp set is connected with the cathode of one line of protection diodes;
the anode of the row protection diode is connected to ground.
According to the utility model provides a display screen protection circuit, the line driver chip circuit includes at least one second data output end; one second data output end of the row driving chip circuit is connected with the anode of one row of LEDs of the LED lamp set;
the row driving chip circuit is used for providing driving signals in a row line direction to a row of LEDs connected with the second data output end through the second data output end.
According to a second aspect of the present invention, there is also provided a display screen protection circuit, comprising a matrix arrangement of light emitting diode LED lamp sets, a line driving chip circuit and at least two line protection diodes;
the anodes of all the LEDs in each row in the LED lamp group are connected together and are connected with the cathode of one row protection diode together, and the anodes are connected with the row driving chip circuit;
the anode of the row protection diode is connected to ground.
According to the utility model provides a display screen protection circuit, the line driver chip circuit includes at least one second data output end; one second data output end of the row driving chip circuit is connected with the anode of one row of LEDs of the LED lamp set;
the row driving chip circuit is used for providing driving signals in a row line direction to a row of LEDs connected with the second data output end through the second data output end.
According to the utility model discloses a third aspect still provides a display screen control system, including treater and as above any kind of first aspect the display screen protection circuit, the treater with be connected with the drive chip circuit of being listed as among the display screen protection circuit.
According to the utility model discloses a fourth aspect still provides a display screen control system, including treater and as above any kind of the second aspect display screen protection circuit, the treater with line driver chip circuit connection among the display screen protection circuit.
The utility model provides a display screen protection circuit and display screen control system connects an one-way column protection diode between the positive voltage output of the common negative pole of every column of LED and power module in the LED banks that the display screen matrix was arranged, and this column protection diode's negative pole is connected with power module's positive voltage output, and the negative pole of the protection diode of being listed as passes through filter circuit ground connection. Therefore, when static electricity is injected from the cathode of the LED, the static electricity is discharged to the filter circuit through the column protection diode, and the LED and the column driving chip circuit cannot be influenced; when static electricity is injected from the anode of the LED, because the display screen is provided with a plurality of rows of LEDs, the LEDs are conducted in the forward direction, the energy of the static electricity can be averaged on each row of LEDs, the static electricity energy flowing through each row of LEDs is small, and the influence on the LEDs and the row driving chips can be ignored. Therefore, the anti-static protection of the LED display screen is realized.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display screen protection circuit according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of a display screen protection circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a filter circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a column driver chip circuit according to an embodiment of the present invention;
fig. 5 is a third schematic structural diagram of a display screen protection circuit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a row driver chip circuit provided in an embodiment of the present invention;
fig. 7 is a fourth schematic structural diagram of a display screen protection circuit according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display screen control system according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that the serial numbers themselves, such as "first", "second", etc., for the components in the present invention are only used for distinguishing the described objects, and do not have any sequence or technical meaning.
For an LED display screen, ESD is a main cause of failure of the LED display screen, and may damage LEDs in the LED display screen, so that the LEDs cannot be turned on after being powered on, or damage a driving chip of the LEDs, and abnormal display of one line or one row of LEDs occurs. Especially, as the LED lamp beads in the LED display screen are more and more dense, the ESD protection of the LED display screen is more important.
Based on this, the utility model provides a display screen protection circuit, including being the common cathode emitting diode LED banks, filter circuit, row driver chip circuit and two at least row protection diodes of matrix arrangement; the cathode of each row of LEDs in the LED lamp group is connected with the anode of one row of protection diodes, and the cathode is connected with the row driving chip circuit; the negative pole of the column protection diode is connected with the positive voltage output end of the power supply module, and the negative pole of the column protection diode is grounded through the filter circuit. Therefore, when electrostatic energy is injected from the cathode of the LED, the electrostatic energy is discharged to the filter circuit through the column protection diode, and the LED and the column driving chip circuit cannot be influenced; when electrostatic energy is injected from the anode of the LED, because the display screen is provided with a plurality of rows of LEDs, the LEDs are conducted in the forward direction, the electrostatic energy can be averaged on each row of LEDs, the electrostatic energy flowing through each row of LEDs is small, and the influence on the LED and the row driving chip circuit can be ignored. Therefore, the anti-static protection of the LED display screen is realized.
Further, for the row line direction of the LED display screen, the anode of each row of LEDs in the LED lamp set may be connected to the cathode of one row protection diode, and the anode of the row protection diode is connected to the ground. In this way, the LED and the row driving chip circuit of the LED display screen can be protected by the row protection diode in the row line direction.
The display screen protection circuit of the present invention is described below with reference to fig. 1 to 7.
Fig. 1 exemplarily shows one of the structural schematic diagrams of the display screen protection circuit provided in the embodiment of the present invention, and as shown in fig. 1, the display screen protection circuit may include a common cathode LED lamp group 10, a filter circuit 20, a column driving chip circuit 30 and at least two column protection diodes arranged in a matrix, a cathode of each column of LEDs in the LED lamp group 10 is commonly connected to an anode of one column protection diode, and a cathode of each column of LEDs is connected to the column driving chip circuit 30; the negative pole of the column protection diode is connected with the positive voltage output end of the power module, and can receive the positive voltage VCC output by the power module, and the negative pole of the column protection diode is connected with the ground GND through the filter circuit 20. The column driver chip circuitry 30 may provide driving signals in the column line direction to the LEDs.
For example, in fig. 1, the LED lamp group 10 is exemplified by an array of 4 × 4, where the cathodes of the LEDs in the first row are commonly connected to the anode of the protection diode D1 in the first row, the cathodes of the LEDs in the second row are commonly connected to the anode of the protection diode D2 in the second row, the cathodes of the LEDs in the third row are commonly connected to the anode of the protection diode D3 in the third row, and the cathodes of the LEDs in the fourth row are commonly connected to the anode of the protection diode D4 in the fourth row. The anode of each row of LEDs of the LED lamp group 10 is commonly connected to a row driving end, such as row driving ends A1, A2, A3, and A4 corresponding to each row in fig. 1, which is used for being connected to the row driving chip circuit and receiving a driving signal in the row line direction output by the row driving chip circuit. The LEDs in the LED lamp group 10 can be turned on and off by the driving signals in the column line direction and the row line direction.
Based on this, the utility model provides a can also include the line driver chip circuit among the display screen protection circuit. For example, taking the LED lamp set 10 as an array of 4 × 4 as an example, fig. 2 exemplarily shows a second schematic structural diagram of the display screen protection circuit provided by the present invention, referring to fig. 2, the display screen protection circuit may further include a row driving chip circuit 40, and an anode of each row of LEDs in the LED lamp set 10 is connected to the row driving chip circuit 40. For example, in fig. 2, the row driving terminals A1, A2, A3 and A4 of the LED lamp group 10 are connected to the row driving chip circuit 40, and can receive the driving signals in the row line direction output by the row driving chip circuit 40.
According to the display screen protection circuit shown in fig. 1 or fig. 2, when the LED display screen normally operates, that is, when the LED lamp group 10 normally operates, the column driving chip circuit 30 outputs a low level signal to the cathode of the LED, the anodes of the column protection diodes D1, D2, D3, and D4 of the respective columns of LEDs are at a low level, and the respective column protection diodes are in a reverse cut-off state, which does not affect the normal operation of the LED lamp group 10.
When static electricity flows in from the cathode of the LED, because the static electricity voltage is much higher than the power voltage VCC, the column protection diodes D1, D2, D3, and D4 are turned on in the forward direction, and the static electricity flows into the filter circuit 20 through the column protection diodes, is absorbed by the energy storage element in the filter circuit 20, and will not affect the LED and the column driver chip circuit 30. When static electricity flows in from the anode of the LED, because the LED lamp group 10 is formed by connecting a plurality of rows of LEDs in parallel, the LEDs are turned on in the forward direction, static electricity can be averaged over each row of LEDs, the static electricity energy flowing through each row of LEDs is very small, and the influence on the LEDs can be ignored.
The embodiment of the utility model provides a display screen protection circuit, through connect an one-way column protection diode who switches on between every column LED's the common negative pole in the LED banks that the display screen matrix was arranged and power module's the positive voltage output, this negative pole of row protection diode is connected with power module's positive voltage output, and the negative pole of row protection diode passes through filter circuit ground connection, the antistatic protection of LED display screen has been realized, the LED that can make the display screen all obtains the protection with a driver chip circuit.
Based on the display screen protection circuit of the corresponding embodiment of fig. 1, in an exemplary embodiment, the filter circuit 30 may be a high-pass filter circuit.
Based on the display screen protection circuit of the corresponding embodiment of fig. 1, in an example embodiment, fig. 3 exemplarily shows one of the structural schematic diagrams of the filter circuit provided by the present invention, referring to fig. 3, the filter circuit 20 may include at least one filter capacitor, one end of the at least one filter capacitor after being connected in parallel is connected to the negative electrodes of all the column protection diodes, and the other end is grounded. In fig. 3, a filter circuit 20 including a first filter capacitor C1, a second filter capacitor C2, and a third filter capacitor C3 is taken as an example for explanation, and with reference to fig. 1, one end of the 3 filter capacitors after being connected in parallel is connected to the negative electrodes of the column protection diodes D1, D2, D3, and D4 in common, that is, connected to the positive voltage VCC, and the other end is connected to the ground GND.
For example, a plurality of filter capacitors are usually connected in parallel in the power supply module of the display screen, and the negative electrode of the column protection diode can be directly connected to the positive voltage output end of the power supply module of the display screen, so that the circuit is simple to implement.
Based on the display screen protection circuit of the corresponding embodiment of fig. 1, the column driver chip circuit 30 may include at least one first data output terminal; a first data output terminal of the column driver chip circuit 30 is connected to the cathodes of a column of LEDs of the LED lamp set 10. The column driver chip circuitry 30 may be arranged to provide a column line direction driving signal via each first data output terminal to a column of LEDs connected to that first data output terminal.
For example, as shown in fig. 1, the column driving chip circuit 30 may include 4 first data output terminals B11, B12, B13, and B14. The first data output end B11 is connected with the cathode of the first row of LEDs and provides a driving signal in the row line direction for the first row of LEDs; the first data output end B12 is connected with the cathode of the second row of LEDs and provides a driving signal in the row line direction for the second row of LEDs; the first data output end B13 is connected to the cathode of the third column of LEDs, and provides a driving signal in the column line direction to the third column of LEDs; the first data output terminal B14 is connected to the cathode of the fourth LED column, and provides a driving signal in the column line direction to the fourth LED column.
Based on the display screen protection circuit of the corresponding embodiment of fig. 1, in an example embodiment, fig. 4 exemplarily shows a schematic structural diagram of the column driver chip circuit provided by the present invention, and referring to fig. 4, the column driver chip circuit 30 may include a column driver chip 31 and a first capacitor C4. The power supply terminal of the column driver chip circuit 30 is configured to receive a positive voltage VCC of the power supply module, and the power supply terminal is connected to ground GND through a first capacitor C4, where the first capacitor C4 may stabilize the positive voltage VCC input to the column driver chip 31; the ground terminal of the column driving chip 31 is connected to ground GND, and the input terminal IN1 is used for being connected to a control device such as a processor or a controller and receiving a control signal of the control device; the data output terminal of the column driving chip 31, which is used as the first data output terminal of the column driving chip circuit 30, may include, for example, 4 data output terminals B11, B12, B13, and B14, where the 4 data output terminals may be respectively connected to cathodes of four columns of LEDs of the LED lamp group 10 IN fig. 1 IN a one-to-one correspondence manner, and the column driving chip 31 may output a driving signal IN a column line direction to the LED lamp group 10 based on a control signal received by the input terminal IN 1.
Illustratively, the column driver chip 31 may be, for example, a driver chip with model number ICND2065 AP.
Based on the display screen protection circuit of the corresponding embodiment of fig. 1, in an exemplary embodiment, fig. 5 exemplarily shows a third schematic structural diagram of the display screen protection circuit provided by the embodiment of the present invention, referring to fig. 5, the display screen protection circuit may further include a line driving chip circuit 40 and at least two line protection diodes, an anode of each line of LEDs in the LED lamp group 10 is commonly connected to a cathode of one line protection diode, and the anode is connected to the line driving chip circuit 40; the anode of the row protection diode is connected to ground GND.
For example, in fig. 5, taking the LED lamp group 10 as an array of 4 × 4 as an example, anodes of the LEDs in the first row are commonly connected to a cathode of the protection diode D5 in the first row, anodes of the LEDs in the second row are commonly connected to a cathode of the protection diode D6 in the second row, anodes of the LEDs in the third row are commonly connected to a cathode of the protection diode D7 in the third row, anodes of the LEDs in the fourth row are commonly connected to a cathode of the protection diode D8 in the fourth row, and anodes of the protection diodes D5, D6, D7 and D8 in the rows are commonly connected to the ground GND. The row driving chip circuit 40 may provide a driving signal in a row line direction to the LEDs in each row, and the LEDs in the LED lamp set 10 may be turned on or off under the driving of the driving signals in the column line direction and the row line direction.
According to the display screen protection circuit shown in fig. 5, when the LED display screen normally works, that is, when the LED lamp group 10 normally works, the line protection diodes D5, D6, D7, and D8 are in the cut-off state, and the line control of the LEDs is not affected.
When forward static electricity flows in from the anodes of the LEDs, the LEDs are forward turned on, the turn-on voltage of the LEDs is clamped at a certain voltage, for example, 1V, and the anodes of the LEDs in each row are connected together, so that the energy of the forward static electricity is dispersed to each column, the influence on the LEDs is small, the LEDs cannot be damaged, and the row driver chip circuit 40 and the column driver chip circuit 30 cannot be damaged.
When negative static electricity flows in from the anode of the LED, the LED is turned off, and the negative static electricity does not flow to the column driving chip circuit 30 through the LED, so that the LED and the column driving chip circuit 30 are not damaged. Moreover, at this time, the row protection diodes D5, D6, D7 and D8 are turned on, and negative static electricity is discharged to the ground through the row protection diodes D5, D6, D7 and D8, so that the row driving chip circuit 40 is not damaged.
When forward static electricity flows from the cathode of the LED, the LED is turned off in the reverse direction, and then the forward static electricity flows in the direction of the column driving chip circuit 30, and the forward static electricity easily damages the column driving chip circuit 30, such as breaking down a pin, etc., and may also break down the LED in the reverse direction, without adding the column protection diodes D1, D2, D3, and D4. After the column protection diodes D1, D2, D3, and D4 are added, the column protection diodes D1, D2, D3, and D4 are turned on by the forward static electricity, so that the energy of the forward static electricity flows to the filter circuit 20 along the column protection diodes D1, D2, D3, and D4, and the energy storage element, such as a capacitor, of the filter circuit 20 can absorb the energy of the forward static electricity. Thus, the LED can be protected from reverse breakdown, and the column driver chip circuit 30 can also be protected from overcurrent breakdown. Meanwhile, for the row driving chip circuit 40, since the LEDs are turned off in the reverse direction, static electricity does not flow into the row driving chip circuit 40, and the row driving chip circuit 40 is not damaged.
When negative static electricity flows in from the cathodes of the LEDs, the LEDs are turned on, and since the anodes of the LEDs in each row of the LED lamp group 10 are connected together and the cathodes of the LEDs in each column are connected together, the negative static electricity can be averaged over the LEDs in each row, the static electricity flowing through the LEDs in each row has very small energy, which can cause negligible influence on the LEDs and can not cause influence on the row driving chip circuit 40 and the column driving chip circuit 30.
The embodiment of the utility model provides a display screen protection circuit, on the one hand, through each line set up a unidirectional flux's line protection diode in display screen LED banks, set up a unidirectional flux's a protection diode at each row, can prevent that the static from causing the damage to LED, line driver chip circuit and a driver chip circuit, play antistatic protection's effect. On the other hand, the row driving chip circuit can be subjected to anti-static protection only by arranging one unidirectional-conduction row protection diode in each row, and the column driving chip circuit can be subjected to anti-static protection only by arranging one unidirectional-conduction column protection diode in each column. Moreover, when the column protection diode is in overcurrent short circuit, the cathode of the LED is forcibly pulled up to the power supply voltage VCC, the LED in the column where the column protection diode is located is cut off in the reverse direction, so that the LED in the column is in a non-bright state, maintenance personnel can quickly position the corresponding column protection diode according to the phenomenon, and the maintenance efficiency is improved.
Based on the display screen protection circuit of the corresponding embodiment of fig. 5, in an exemplary embodiment, the row driver chip circuit 40 may include at least one second data output terminal; a second data output terminal of the row driver chip circuit 40 is connected to the anodes of a row of LEDs of the LED lamp set 10. The row driver chip circuit 40 may be configured to provide a row-wise driving signal via each second data output terminal to a row of LEDs connected to the second data output terminal.
For example, as shown in fig. 5, the row driving chip circuit 40 may include 4 second data output terminals B21, B22, B23, and B24. The second data output end B21 is connected with the anodes of the LEDs in the first row and provides driving signals in the row line direction for the LEDs in the first row; the second data output end B22 is connected with the anodes of the LEDs in the second row and provides driving signals in the row line direction for the LEDs in the second row; the second data output end B23 is connected with the anode of the third row of LEDs and provides a driving signal in the row line direction for the third row of LEDs; the second data output terminal B24 is connected to the anode of the fourth row of LEDs, and provides a driving signal in the row direction to the fourth row of LEDs.
Based on the display screen protection circuit corresponding to the embodiment in fig. 5, in an example embodiment, fig. 6 exemplarily shows a schematic structural diagram of a line driver chip circuit provided by the embodiment of the present invention, and referring to fig. 6, the line driver chip circuit 40 may include a line driver chip 41, a second capacitor C5, and a third capacitor C6. The power supply end of the row driving chip circuit 40 is configured to receive a positive voltage VCC of the power supply module, the power supply end is connected to ground GND through a second capacitor C5 and a third capacitor C6 that are connected in parallel, and the second capacitor C5 and the third capacitor C6 can stabilize the positive voltage VCC input to the row driving chip 41; the ground terminal of the row driving chip 41 is connected to ground GND, and the input terminal IN2 is used for being connected to a control device such as a processor or a controller and receiving a control signal of the control device; the data output terminal of the row driving chip 41, which is used as the second data output terminal of the row driving chip circuit 40, may include 4 data output terminals B21, B22, B23, and B24, for example, and the row driving chip 41 may output a driving signal IN a row line direction to the LED lamp group 10 based on the control signal received by the input terminal IN 2.
Illustratively, the row driver chip 41 may be, for example, a driver chip with model number ICND2018 AP.
Based on the same conception, fig. 7 illustrates the fourth schematic structural diagram of the display screen protection circuit provided by the embodiment of the present invention, and as shown in fig. 7, the display screen protection circuit may include the light emitting diode LED lamp group 10, the row driving chip circuit 40 and at least two row protection diodes which are arranged in a matrix. Wherein, the anodes of each row of LEDs in the LED lamp set 10 are connected together, and the anodes are connected together with the cathode of a row protection diode, and the anodes are connected with the row driving chip circuit 40; the anode of the row protection diode is connected to ground GND. The row driving chip circuit 40 may provide a driving signal in a row line direction to the LEDs.
For example, in fig. 7, the LED lamp group 10 is exemplified by an array of 4 × 4, in which the anodes of the LEDs in the first row are connected to the cathode of the protection diode D5 in the first row in common, the anodes of the LEDs in the second row are connected to the cathode of the protection diode D6 in the second row in common, the anodes of the LEDs in the third row are connected to the cathode of the protection diode D7 in the third row in common, and the anodes of the LEDs in the fourth row are connected to the cathode of the protection diode D8 in the fourth row in common. The anodes of the row protection diodes D5, D6, D7 and D8 are connected in common to ground GND. The cathodes of the columns of the LED lamp groups 10 may be used to connect with the 4 first data output terminals B11, B12, B13 and B14 of the column driving chip circuit 30, respectively.
The principle of the anti-static protection of the display screen protection circuit shown in fig. 7 can be described with reference to the embodiment of fig. 5, and is not described herein again.
Based on the display screen protection circuit of the corresponding embodiment of fig. 7, in an exemplary embodiment, the row driver chip circuit 40 may include at least one second data output terminal; a second data output of the row driver chip circuit 40 is connected to the anodes of a row of LEDs of the LED lamp set 10. The row driving chip circuit 40 is configured to provide a driving signal in a row line direction to a row of LEDs connected to each second data output terminal through each second data output terminal.
Based on the utility model discloses display screen protection circuit, fig. 8 exemplarily shows the utility model provides a display screen control system's schematic structure diagram, it is shown with reference to fig. 8 to refer to, and display screen control system 80 can include treater 81 and the display screen protection circuit 82 of being connected with treater 81. The display screen protection circuit 82 may be the display screen protection circuit described in any embodiment corresponding to fig. 1 to 6, and the processor 81 may be connected to the column driver chip circuit 30 in the display screen protection circuit.
Illustratively, the display screen protection circuit 82 may be a display screen protection circuit as described in the corresponding embodiment of fig. 7, and the processor 81 may be connected to the row driver chip circuit 40 in the display screen protection circuit.
It can be understood that, when the column driver chip circuit 30 and the row driver chip circuit 40 are included in the display screen protection circuit provided by the embodiment of the present invention, the processor 81 is connected to the column driver chip circuit 30 and the row driver chip circuit 40 respectively.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A display screen protection circuit is characterized by comprising a common cathode Light Emitting Diode (LED) lamp group, a filter circuit, a column driving chip circuit and at least two column protection diodes, wherein the common cathode LED lamp group, the filter circuit, the column driving chip circuit and the at least two column protection diodes are arranged in a matrix;
the cathode of each row of LEDs in the LED lamp set is connected with the anode of one row of protection diodes, and the cathode is connected with the row driving chip circuit;
the negative electrode of the column protection diode is connected with the positive voltage output end of the power supply module, and the negative electrode of the column protection diode is grounded through the filter circuit.
2. The display screen protection circuit of claim 1, wherein the filter circuit comprises at least one filter capacitor;
and one end of the at least one filter capacitor after being connected in parallel is connected with the cathode of the column protection diode, and the other end of the at least one filter capacitor is grounded.
3. The display screen protection circuit of claim 1, wherein the column driver chip circuit comprises at least one first data output terminal; one first data output end of the column driving chip circuit is connected with the cathode of one column of LEDs of the LED lamp set;
the column driving chip circuit is used for providing driving signals in a column line direction to a column of LEDs connected with the first data output end through the first data output end.
4. A display screen protection circuit according to any one of claims 1 to 3, further comprising a row driver chip circuit;
and the anode of each row of LEDs in the LED lamp set is connected with the row driving chip circuit.
5. The display screen protection circuit of claim 4, further comprising at least two row protection diodes;
the anode of each line of LEDs in the LED lamp set is connected with the cathode of one line of protection diodes;
the anode of the row protection diode is connected to ground.
6. The display screen protection circuit of claim 4, wherein the row driver chip circuit comprises at least one second data output; one second data output end of the row driving chip circuit is connected with the anode of one row of LEDs of the LED lamp set;
the row driving chip circuit is used for providing driving signals in a row line direction to a row of LEDs connected with the second data output end through the second data output end.
7. A display screen protection circuit is characterized by comprising Light Emitting Diode (LED) lamp groups arranged in a matrix manner, a row driving chip circuit and at least two row protection diodes;
the anodes of all the rows of LEDs in the LED lamp set are connected together and are connected with the cathode of one row of protection diodes, and the anodes are connected with the row driving chip circuit;
the anode of the row protection diode is connected to ground.
8. The display screen protection circuit of claim 7, wherein the row driver chip circuit comprises at least one second data output; one second data output end of the row driving chip circuit is connected with the anode of one row of LEDs of the LED lamp set;
the row driving chip circuit is used for providing a driving signal in a row line direction for a row of LEDs connected with the second data output end through the second data output end.
9. A display screen control system, characterized by comprising a processor and the display screen protection circuit of any one of claims 1 to 6, wherein the processor is in circuit connection with the column driving chips in the display screen protection circuit.
10. A display control system comprising a processor and the display protection circuit of claim 7 or 8, wherein the processor is in circuit connection with the row driver chips in the display protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222535705.6U CN218631336U (en) | 2022-09-22 | 2022-09-22 | Display screen protection circuit and display screen control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222535705.6U CN218631336U (en) | 2022-09-22 | 2022-09-22 | Display screen protection circuit and display screen control system |
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| Publication Number | Publication Date |
|---|---|
| CN218631336U true CN218631336U (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222535705.6U Active CN218631336U (en) | 2022-09-22 | 2022-09-22 | Display screen protection circuit and display screen control system |
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| Country | Link |
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| CN (1) | CN218631336U (en) |
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