CN111798790B - Display control card and display system - Google Patents
Display control card and display system Download PDFInfo
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- CN111798790B CN111798790B CN201910278846.4A CN201910278846A CN111798790B CN 111798790 B CN111798790 B CN 111798790B CN 201910278846 A CN201910278846 A CN 201910278846A CN 111798790 B CN111798790 B CN 111798790B
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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]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The embodiment of the invention discloses a display control card and a display system. The display control card comprises: a circuit board; the alternating current-to-direct current power supply circuit is arranged on the circuit board; the power supply control circuit is arranged on the circuit board and comprises a microcontroller and a switch circuit connected with the microcontroller, and the microcontroller and the switch circuit are respectively connected with an alternating current-to-direct current power supply circuit; the detection circuit is arranged on the circuit board and is connected with the microcontroller; the image signal input interface is arranged on the circuit board; the image signal processing circuit is positioned on the circuit board, and the image signal processing circuit is connected with the switching circuit and the image signal input interface; the image signal output interface is arranged on the circuit board and connected with the image signal processing circuit; and the lamp panel power output interface is arranged on the circuit board and is connected with the switch circuit. The embodiment of the invention can realize real-time monitoring of the working condition of the display system and intelligent control of the power supply.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display control card and a display system.
Background
Along with the high-speed development of the LED display technology, the number of lamp panels needing to be loaded by a display control card is more and more, in addition, the LED display screen is complex in structure and severe in working environment, so that the abnormity of voltage, temperature, humidity and the like on the display control card is caused, and the failure rate of the LED display screen is higher. Although the current display control card has the functions of detecting voltage, temperature, humidity and the like, the current display control card cannot intelligently control a power supply according to various working conditions so as to protect the whole display system.
Disclosure of Invention
Therefore, the embodiment of the invention provides a display control card and a display system, which can realize real-time monitoring of the working condition of the display system and intelligent control of a power supply.
In one aspect, an embodiment of the present invention provides a display control card, including: a circuit board; the alternating current-to-direct current power supply circuit is arranged on the circuit board; the power supply control circuit is arranged on the circuit board and comprises a microcontroller and a switch circuit connected with the microcontroller, and the microcontroller and the switch circuit are respectively connected with the AC-to-DC power supply circuit; the detection circuit is arranged on the circuit board and is connected with the microcontroller; the image signal input interface is arranged on the circuit board; the image signal processing circuit is positioned on the circuit board, and the image signal processing circuit is connected with the switching circuit and the image signal input interface; the image signal output interface is arranged on the circuit board and connected with the image signal processing circuit; and the lamp panel power output interface is arranged on the circuit board and connected with the switch circuit.
In one embodiment of the present invention, the detection circuit includes a voltage detection circuit, a temperature detection circuit, a humidity detection circuit, and/or a light intensity detection circuit, which are respectively connected to the microcontroller.
In one embodiment of the present invention, the image signal processing circuit includes: the programmable logic device, the second microcontroller, the Ethernet physical layer transceiver and the DC-to-DC power supply circuit; the Ethernet physical layer transceiver is connected between the image signal input interface and the programmable logic device, the second microcontroller is connected with the programmable logic device, and the direct current-to-direct current power circuit is connected with the programmable logic device, the second microcontroller, the Ethernet physical layer transceiver and the switch circuit.
In one embodiment of the present invention, the image signal processing circuit includes: the device comprises a programmable logic device, an Ethernet physical layer transceiver and a direct current-to-direct current power supply circuit; the Ethernet physical layer transceiver is connected between the image signal input interface and the programmable logic device, the programmable logic device is connected with the microcontroller, and the direct current-to-direct current power circuit is connected with the programmable logic device, the Ethernet physical layer transceiver and the switch circuit.
In an embodiment of the present invention, the display control card includes a core board, the circuit board is provided with a connector, and the core board is plugged into the connector; the image signal processing circuit is disposed on the core board.
In one embodiment of the invention, the switch circuit comprises a single switch unit, and the single switch unit is connected with the lamp panel power supply output interface and the image signal processing circuit.
In one embodiment of the invention, the single switching unit is a relay.
In one embodiment of the invention, the lamp panel power supply output interfaces are multiple; the power control circuit further comprises a second switch circuit, the second switch circuit is connected with the single switch unit and the microcontroller, the second switch circuit comprises a plurality of second switch units, and the plurality of second switch units are connected with the plurality of lamp panel power output interfaces in a one-to-one correspondence mode.
In an embodiment of the present invention, the switch circuit includes a plurality of switch units, and the lamp panel power output interface and the image signal processing circuit are respectively connected to the plurality of switch units in a one-to-one correspondence.
In another aspect, an embodiment of the present invention provides a display system, including: the display control card as described above; and the LED lamp panel is connected with the lamp panel power output interface and the image signal output interface of the display control card.
One of the above technical solutions has the following advantages or beneficial effects: the embodiment of the invention can detect various working conditions of the display system in real time and automatically carry out corresponding intelligent control on the power supply by arranging the circuits such as the power supply control circuit, the detection circuit and the like on the circuit board of the display control card, thereby effectively reducing the failure rate of the display control card and the display system and improving the product quality.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display control card according to a first embodiment of the present invention.
Fig. 2 is another schematic structural diagram of a display control card according to a first embodiment of the present invention.
Fig. 3 is a schematic diagram of a connection relationship between the dc-to-dc power circuit and other elements in the image signal processing circuit shown in fig. 2.
Fig. 4a to 4c are schematic diagrams of three structures of the power control circuit shown in fig. 2.
Fig. 5 is a schematic structural diagram of another core board of a display control card according to another embodiment of the present invention.
Fig. 6 is a schematic structural diagram of each component on the circuit board of the display control card shown in fig. 5.
Fig. 7 is a schematic structural diagram of another display control card according to another embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a display system according to a second embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
[ first embodiment ] A method for manufacturing a semiconductor device
As shown in fig. 1, a display control card 100 according to a first embodiment of the present invention is provided. The display control card 100 provided in this embodiment can be used for connecting a display lamp panel such as an LED lamp panel, for example, to provide a working power signal and display data and a control signal to the LED lamp panel, thereby lighting the LED lamp panel and controlling the brightness of each LED display pixel on the LED lamp panel.
The display control card 100 includes, for example, a circuit board 110, an ac-dc power circuit 120, a lamp panel power output interface 130, an image signal output interface 140, an image signal processing circuit 150, an image signal input interface 160, a power control circuit 170, and a detection circuit 180.
The Circuit Board 100 is, for example, a Printed Circuit Board (PCB), and has the characteristics of high wiring density, light weight, thin thickness, and the like.
The ac-to-dc power supply circuit 120 is disposed on the circuit board 110. The ac-to-dc power supply circuit 120 includes, for example, a rectifier filter circuit for converting an input ac power into a dc power, for example, 220V ac power into 5V and 3.3V dc power for supplying power to other electric components. The dc output voltage of the ac-to-dc power circuit 120 can be adjusted according to actual needs. It should be noted that the AC-DC power circuit 120 of the present embodiment can be constructed by using similar electronic components in a commercially available AC-DC power supply, and therefore, the specific circuit structure thereof is not described herein again.
The power control circuit 170 is disposed on the circuit board 110. Specifically, as shown in fig. 1, the power supply control circuit 170 includes, for example, a microcontroller 171 and a switch circuit 173. The microcontroller 171 and the switch circuit 173 are connected to the ac-dc power supply circuit 120, respectively. The microcontroller 171 is also connected to a switching circuit 173. The switch circuit 173 is also connected to the lamp panel power output interface 130 and the image signal processing circuit 150. The microcontroller 171 is a controller such as an MCU, a DSP, an ARM, or the like. The microcontroller 171 is connected to the ac-to-dc power circuit 120 to obtain power, and simultaneously sends out a corresponding control command to control the ac-to-dc power circuit 120 to perform dc output voltage adjustment when receiving a relevant signal. The switch circuit 173 disconnects or closes the connection between the ac-dc power supply 120 and the lamp panel power output interface 130 and/or the image signal processing circuit 150 under the control of the microcontroller 171 to realize power-off and power-on.
The detection circuit 180 is disposed on the circuit board 110. The detection circuit 180 is configured to detect relevant parameters of the display control card 100 and the display lamp panel connected thereto, such as operating voltage, operating temperature, humidity, and ambient light intensity, and output the detected signals to the microcontroller 171 of the power control circuit 170, so that the microcontroller 171 controls the operations of the switch circuit 173 and the ac-to-dc power supply circuit 120.
Specifically, as shown in fig. 2, the detection circuit 180 includes, for example, a voltage detection circuit 181, a temperature detection circuit 183, a humidity detection circuit 185, and/or a light intensity detection circuit 187. The voltage detection circuit 181, the temperature detection circuit 183, the humidity detection circuit 185, and/or the light intensity detection circuit 187 are connected to the microcontroller 171, respectively.
The voltage detection circuit 181 includes, for example, a voltage sampling circuit commonly used in the prior art, and is configured to collect the working voltage on the display control card 100 or the display lamp panel and output the collected result to the microcontroller 171 for detecting whether the working voltage is abnormal. When an operating voltage anomaly (short circuit) is detected, the microcontroller 171 issues a control command to control the switch circuit 173 to open, so as to avoid greater damage caused by the anomaly.
The temperature detection circuit 183 includes a temperature sensor such as a thermistor, for example, and is configured to collect an operating temperature of the display control card 100 and/or the display lamp panel and provide the collected result to the microcontroller 171 for detecting the operating temperature of the display lamp panel. When the temperature anomaly (overheating) is detected, the microcontroller 171 can send a control instruction to the ac-to-dc power supply circuit 120 to reduce the output voltage, and adjust the display brightness or the display effect of the display lamp panel to make the display lamp panel enter a low power consumption working mode. When the temperature is detected to reach the overheat protection point, the microcontroller 171 issues a control command to control the switch circuit 173 to be turned off, so as to prevent the abnormality from causing further damage.
The humidity detection circuit 185 includes a humidity sensor such as a humidity sensor, for example, a humidity sensor, which is used to collect the humidity of the external environment and provide the collected result to the microcontroller 171 for performing corresponding control processing. For example, when it is detected that the humidity of the external environment is high, the microcontroller 171 sends a control instruction to control the ac-to-dc power supply circuit 120 to increase the output voltage, so as to improve the display brightness of the display lamp panel, thereby increasing the heat productivity of the display lamp panel and achieving the purpose of dehumidification.
The light intensity detecting circuit 187 includes, for example, an illumination sensor, which is used to collect the illumination intensity of the external environment at the display lamp panel and provide the collected result to the microcontroller 171 for the microcontroller 171 to perform corresponding control processing. When detecting that the illumination intensity of the external environment is strong, the microcontroller 171 sends a control instruction to control the ac-to-dc power supply circuit 120 to increase the output voltage, so as to improve the display brightness of the display lamp panel to adapt to the external environment. When the light intensity of the external environment is detected to be weak, the microcontroller 171 sends a control instruction to control the ac-to-dc power supply circuit 120 to reduce the output voltage, and the display brightness of the display lamp panel is reduced to adapt to the external environment.
It should be noted here that only a part or all of the voltage detection circuit 181, the temperature detection circuit 183, the humidity detection circuit 185, and the light intensity detection circuit 187 may be provided on the display control card 100. In addition, part or all of the voltage detection circuit 181, the temperature detection circuit 183, the humidity detection circuit 185, and the light intensity detection circuit 187 may be integrated into one circuit and connected to the microcontroller 171.
Lamp panel power output interface 130 is disposed on circuit board 110. The panel power output interface 130 is connected to the switch circuit 173 of the power control circuit 170 to supply power from the ac-dc power circuit 120 and provide dc power with a voltage of, for example, not higher than 5V, such as about 4.8V, to the display panel connected thereto. The number of the lamp panel power output interfaces 130 may be one (see fig. 1) or multiple (see fig. 2). The power output interface 130 of the single lamp panel can be connected with one display lamp panel or a plurality of display lamp panels. A plurality of lamp plate power output interfaces 130 are for example the connector respectively to the user shows the power cord of lamp plate through quick plug-in connection, and the line is convenient. Of course, the lamp panel power output interface 130 may also be other types of connectors, such as a screw interface, and the embodiment of the invention is not limited thereto.
The image signal output interface 140 is disposed on the circuit board 110 and connected to the LED lamp panel, and provides display data and a control signal to the LED lamp panel to display a corresponding picture on the LED lamp panel. The image signal output interface 140 includes, for example, display data output pins such as red (R), green (G), and blue (B) signals, and related control signal output pins such as an enable signal (OE), a blank signal (CTRL), a clock signal (CLK), and the like. The number of the image signal output interfaces 140 may be one or more. Each image signal output interface 140 is, for example, a connector, such as a 16-pin or 26-pin header, so that the image signal output interface 140 and the display panel can be connected by a flexible flat cable. Of course, the image signal output interface 140 may also be other types of connectors, and the embodiment of the invention is not limited thereto. One image signal output interface 140 may be connected to one LED lamp panel or to a plurality of LED lamp panels.
The image signal input interface 160 is provided on the circuit board 110. The image signal input interface 160 is used to connect an image signal transmitting apparatus such as a transmitting card, for example, to acquire an image signal from the transmitting card and transmit the image signal to the image signal processing circuit 150. The image signal input interface 160 is, for example, an ethernet interface such as an RJ45 network port. The image signal input interface 160 may also be other types of signal interfaces such as other signal interfaces suitable for long-distance signal transmission.
The image signal processing circuit 150 is disposed on the circuit board 110. As shown in fig. 1, the image signal processing circuit 150 is connected to the switch circuit 173 to take power from the ac-dc power supply circuit 120 through the switch circuit 173. The image signal processing circuit 150 is also connected to the image signal input interface 160 and the image signal output interface 140. The image signal processing circuit 150 obtains the image signal from the image signal input interface 160 and processes the image signal to obtain the display data and the control signal required by the display lamp panel, and outputs the display data and the control signal to the carried display lamp panel through the image signal output interface 140 for image display.
As described above, as shown in fig. 2, the image signal processing circuit 150 includes a programmable logic device 152, a microcontroller 154, an ethernet physical layer transceiver 153, and a dc-to-dc power supply circuit 151. The programmable logic device 152 is, for example, a Field Programmable Gate Array (FPGA) device, and is mainly used for processing an image signal to generate display data and a control signal for a display panel. The microcontroller 154 is, for example, an MCU, which is mainly used to load the programmable logic device 152 and the like. The ethernet physical layer transceiver 153 is connected between the image signal input interface 160, e.g., an ethernet interface, and the programmable logic device 152. The microcontroller 154 is connected to the programmable logic device 152. The dc-dc power supply circuit 151 is connected to the switch circuit 173. The dc-to-dc power supply circuit 151 is also connected to a programmable logic device 152, a microcontroller 154 and an ethernet physical layer transceiver 153. The ac-to-dc power circuit 120 outputs dc power to the dc-to-dc power circuit 151 through the power control circuit 170, and the dc-to-dc power circuit 151 converts the voltage of the input dc power and outputs the converted dc power to the programmable logic device 152, the microcontroller 154, and the ethernet physical layer transceiver 153.
In addition, as shown in fig. 2, the image signal processing circuit 150 further includes a nonvolatile memory 155 such as FLASH. The non-volatile memory 155 is used for storing data of the display control card 100, so as to prevent data loss after the display control card 100 is powered down. Furthermore, the image signal processing circuit 150 further includes a volatile memory 156 such as an SDRAM, and the volatile memory 156 is used to provide a data buffer space. The dc-dc power supply circuit 151 also connects the nonvolatile memory 155 and the volatile memory 156 to supply power to the nonvolatile memory 155 and the volatile memory 156.
More specifically, as shown in fig. 3, the dc-dc power supply circuit 151 converts the dc power having a voltage not higher than 5V output from the switch circuit 173, for example, into dc power having voltages of, for example, 3.3V and 1.2V, and supplies power to the programmable logic device 152, the ethernet physical layer transceiver 153, the microcontroller 154, the nonvolatile memory 155, and the volatile memory 156.
Further, as shown in fig. 2, the display control card 100 further includes a signal driving chip 143. The signal driving chip 143 is located on the circuit board 110. The signal driving chip 143 is connected to the switch circuit 173 to obtain the dc operating voltage. The signal driving chip 143 is connected between the image signal output interface 140 and the image signal processing circuit 150.
Furthermore, as shown in fig. 2, the display control card 100 may further include a network transformer chip 190. Network transformer chip 190 is disposed on circuit board 110. The network transformer chip 190 is connected between the image signal input interface 160 and the ethernet physical layer transceiver 153.
Further, the switch circuit 173 includes a switch unit 1731. The switch unit 1731 is, for example, a relay or other electronic components having similar functions.
Specifically, as shown in fig. 4a, the switch circuit 173 includes a single switch unit 1731. The lamp panel power output interface 130 and the image signal processing circuit 150 are connected to the single switch unit 1731. The single switching unit 1731 is also connected to the microcontroller 171. Here, the number of the lamp panel power output interfaces 130 may be one or more. In this way, the power supply of all the lamp panel power output interfaces 130 and the image signal processing circuit 150 can be controlled by one switch unit 1731. For example, when the voltage is abnormal, the microcontroller 171 may control the single switch unit 1731 to be turned off to avoid causing a larger loss.
Further, as shown in fig. 4b, the switch circuit 173 includes a plurality of switch units 1731. The lamp panel power output interface 130 and the image signal processing circuit 150 are respectively connected to the plurality of switch units 1731 in a one-to-one correspondence manner. The plurality of switching units 1731 are also respectively connected to the microcontroller 171. Here, the number of the lamp panel power output interfaces 130 may be one or more. In this way, any one of the switch units 1731 can be independently controlled to be turned on or off according to actual needs, and even the output voltage of any one of the switch units 1731 can be independently adjusted, so that the control is flexible. For example, when the display system is powered on, the microcontroller 171 can control the turn-on sequence of the switch units 1731 according to the cascade condition of the display lamp panel and the display control card, and can realize one-by-one power-on or selective power-on of the display lamp panels connected to the display control card 100, so as to reduce the influence of the instantaneous heavy load (instantaneous current and voltage stress) on the power supply, and further effectively protect the whole display system while realizing the power supply control.
Further, as shown in fig. 4c, the switch circuit 173 includes a single switch unit 1731. The power control circuit 170 further includes a switching circuit 175. The switching circuit 175 connects the single switching unit 1731 and the microcontroller 171. The switching circuit 175 includes a plurality of switching units 1751. The switch units 1751 are connected with the lamp panel power output interfaces 130 in a one-to-one correspondence manner. Thus, the unified control and the individual control of all lamp panel power output interfaces 130 can be realized. Certainly, a switch unit 1751 may be disposed between the switch unit 1731 and the image signal processing circuit 150 to implement unified control and independent control of the image signal processing circuit 150, so as to provide a higher control flexibility for a user, thereby not only improving the control efficiency, but also improving the user experience.
In summary, the power control circuit, the detection circuit and other circuits are arranged on the circuit board of the display control card, so that various working conditions of the display system can be detected in real time, the power supply can be automatically and intelligently controlled correspondingly, the failure rate of the display control card and the display system is effectively reduced, and the product quality is improved. Firstly, by arranging a single switch unit 1731 in the switch circuit 173, the unified control of all the lamp panel power output interfaces 130 and the image signal processing circuit 150 is realized; by arranging a plurality of switch units 1731 in the switch circuit 173, all the lamp panel power output interfaces 130 and the image signal processing circuit 150 are independently controlled; a plurality of switch units 1751 of switch circuit 175 are added on the basis of switch circuit 173, so that unified control and independent control of all lamp panel power output interfaces 130 and image signal processing circuit lines are realized, higher control flexibility is provided for users, and control efficiency and customer experience are improved.
In addition, in other embodiments of the present invention, as shown in fig. 5, the display control card 100 further includes a core board 500. The image signal processing circuit 150 located on the circuit board 110 in fig. 1 and 2 is provided on the core board 500, not directly on the circuit board 110. Specifically, the image signal processing circuit 150 on the circuit board 110 in fig. 1, for example, is replaced with a connector 113 (see fig. 6). The core board 500 is plugged to the connector 113 on the circuit board 110. In addition, the switch circuit 173 provided on the circuit board 110 is connected to the dc-to-dc power supply circuit 151 of the image signal processing circuit 150 provided on the core board 500 through the connector 113. The network transformer chip 190 provided on the circuit board 110 is connected to the ethernet physical layer transceiver 153 of the image signal processing circuit 150 provided on the core board 500 through the connector 113. Therefore, by reserving the connection interface on the circuit board 110, flexible replacement and later-stage function expansion and upgrade of the core board 500 are facilitated. In addition, the connectors 113 are, for example, connectors such as row female connectors arranged in pairs, and the core board 500 is also provided with connectors 510 such as row pin connectors arranged in pairs, which are matched with the connectors 113, so that the core board 500 can be quickly plugged onto the circuit board 110. Of course, other circuit and/or electronic components on the circuit board 110, such as the network transformer chip 190, may also be selectively disposed on the core board 500 according to the actual application.
Further, in other embodiments of the present invention, as shown in fig. 7, the image signal processing circuit 150 and the power control circuit 170 share one microcontroller, such as the microcontroller 171 of the power control circuit 170. For example, the programmable logic device 152, the nonvolatile memory 155, and the volatile memory 156 in the image signal processing circuit 150 are connected to the microcontroller 171 of the power supply control circuit 170, that is, the microcontroller 171 also has the function of the microcontroller 154. Therefore, the number of the microcontrollers can be reduced, the circuit structure is simplified, the product cost is reduced, and the product competitiveness is improved. It should be noted that the image signal processing circuit 150 (without the microcontroller 154) may also be disposed on the core board independently and connected to the circuit board 110 of the display control card 100 through a connector, such as a fast connector, similar to fig. 5 and 6, and will not be described herein again.
[ second embodiment ]
As shown in fig. 8, a second embodiment of the present invention provides a display system 10. The display system 10 includes, for example, a display control card 100 and an LED lamp panel 200.
Specifically, the display control card 100 includes, for example, a lamp panel power output interface 130, an image signal output interface 140, and a power control circuit 170. The power control circuit 170 is connected to the lamp panel power output interface 130. Of course, the display control card 100 may adopt the display control card 100 provided in the foregoing first embodiment of the present invention.
The LED lamp panel 200 is connected to the lamp panel power output interface 130 to obtain the operating voltage from the display control card 100. The LED lamp panel 200 is connected to the image signal output interface 140 to obtain display data and control signals from the display control card 100 to realize image display.
For the specific implementation process and technical effects of the embodiment of the present invention, reference is made to the description of the first embodiment of the present invention, and details are not repeated here.
In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present invention, and the technical solutions of the embodiments can be arbitrarily combined and collocated without conflict between technical features and structural contradictions, which do not violate the purpose of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and the actual implementation may have another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A display control card, comprising:
a circuit board;
the alternating current-to-direct current power supply circuit is arranged on the circuit board;
the power supply control circuit is arranged on the circuit board and comprises a microcontroller and a switch circuit connected with the microcontroller, and the microcontroller and the switch circuit are respectively connected with the AC-to-DC power supply circuit;
the detection circuit is arranged on the circuit board and comprises a voltage detection circuit, a temperature detection circuit, a humidity detection circuit and/or a light intensity detection circuit which are respectively connected with the microcontroller;
the image signal input interface is arranged on the circuit board;
the image signal processing circuit is positioned on the circuit board, and the image signal processing circuit is connected with the switching circuit and the image signal input interface;
the image signal output interface is arranged on the circuit board and connected with the image signal processing circuit; and
the lamp panel power supply output interface is arranged on the circuit board and connected with the switch circuit;
the voltage detection circuit, the temperature detection circuit, the humidity detection circuit and/or the light intensity detection circuit respectively detect working voltage, working temperature, humidity and/or external light intensity of the display control card and a display lamp panel connected with the display control card so as to obtain detection signals and output the detection signals to the microcontroller of the power supply control circuit, and the microcontroller determines working condition states based on the detection signals and controls the action of the switching circuit and the alternating current-to-direct current power supply circuit based on the working condition states;
the voltage detection circuit is specifically used for collecting working voltage on the display control card or the display lamp panel and outputting a collection result to the microcontroller so as to detect whether the working voltage is abnormal or not, and when the working voltage is detected to be abnormal, the microcontroller sends a control instruction to control the switching circuit to be switched off;
the temperature detection circuit comprises a temperature sensor, and is specifically used for collecting the working temperature of the display control card and/or the display lamp panel and outputting a collection result to the microcontroller so as to detect the working temperature of the display lamp panel, when abnormal temperature is detected, the microcontroller sends a control instruction to the AC-to-DC power supply circuit to reduce output voltage, and adjusts the display brightness or display effect of the display lamp panel so as to enable the display lamp panel to enter a low power consumption mode, and when the temperature is detected to reach an overheat protection point, the microcontroller sends a control instruction to control the switching circuit to be switched off;
the humidity detection circuit comprises a humidity sensor, and is specifically used for acquiring the humidity of the external environment and outputting an acquisition result to the microcontroller so as to control the output voltage of the display lamp panel to adjust the humidity of the external environment;
wherein, light intensity detection circuit includes light intensity sensor, specifically is used for gathering the external environment's of demonstration lamp plate department illumination intensity and output extremely microcontroller is in order to supply control the output voltage of demonstration lamp plate is in order to adjust the illumination intensity of the demonstration luminance of demonstration lamp plate in order to adapt to external environment.
2. The display control card of claim 1, wherein the image signal processing circuit comprises: the programmable logic device, the second microcontroller, the Ethernet physical layer transceiver and the DC-to-DC power supply circuit; the Ethernet physical layer transceiver is connected between the image signal input interface and the programmable logic device, the second microcontroller is connected with the programmable logic device, and the direct current-to-direct current power circuit is connected with the programmable logic device, the second microcontroller, the Ethernet physical layer transceiver and the switch circuit.
3. The display control card of claim 2, wherein the display control card comprises a core board, the circuit board is provided with a connector, and the core board is plugged into the connector; the image signal processing circuit is disposed on the core board.
4. The display control card of claim 1, wherein the image signal processing circuit comprises: the device comprises a programmable logic device, an Ethernet physical layer transceiver and a direct current-to-direct current power supply circuit; the Ethernet physical layer transceiver is connected between the image signal input interface and the programmable logic device, the programmable logic device is connected with the microcontroller, and the direct current-to-direct current power circuit is connected with the programmable logic device, the Ethernet physical layer transceiver and the switch circuit.
5. The display control card of claim 1, wherein the switch circuit comprises a single switch unit, and the single switch unit is connected with the lamp panel power output interface and the image signal processing circuit.
6. The display control card of claim 5, wherein the single switch unit is a relay.
7. The display control card of claim 5, wherein the lamp panel power supply output interfaces are plural; the power control circuit further comprises a second switch circuit, the second switch circuit is connected with the single switch unit and the microcontroller, the second switch circuit comprises a plurality of second switch units, and the plurality of second switch units are connected with the plurality of lamp panel power output interfaces in a one-to-one correspondence mode.
8. The display control card of claim 1, wherein the switch circuit comprises a plurality of switch units, and the lamp panel power output interface and the image signal processing circuit are respectively connected to the plurality of switch units in a one-to-one correspondence.
9. A display system, comprising:
a display control card according to any of claims 1 to 8; and
and the LED lamp panel is connected with the lamp panel power output interface and the image signal output interface of the display control card.
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