CN215956040U - Display power supply system and display equipment - Google Patents
Display power supply system and display equipmentDownload PDFInfo
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- CN215956040U CN215956040UCN202120892807.6UCN202120892807UCN215956040UCN 215956040 UCN215956040 UCN 215956040UCN 202120892807 UCN202120892807 UCN 202120892807UCN 215956040 UCN215956040 UCN 215956040U
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Abstract
Translated fromChinese
Description
Technical Field
The application relates to the technical field of circuits, in particular to a display screen power supply system and display equipment.
Background
At present, the power supply voltage required by different models of display screens is also different, for example, the power supply voltage of a display screen may be 5 volts (V), 12V, and the like. The mainboard is connected with the display screen, and the power supply circuit in the mainboard supplies power to the display screen. However, when the model of the display screen is not determined, the mainboard supplies power to the display screen by mistake, and the display screen can be burnt.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a display screen power supply system, which can accurately supply power to a display screen, thereby avoiding burning the display screen. The technical scheme is as follows:
the system comprises a mainboard and a display screen, wherein the display screen comprises a power supply pin, at least one tested pin and each signal circuit corresponding to the tested pin, the mainboard comprises each detection pin corresponding to the tested pin, a system-on-chip, a power supply pin and at least two power supply circuits, and the system comprises:
each tested pin is respectively connected with a signal circuit corresponding to each tested pin and a detection pin corresponding to each tested pin;
the system-on-chip is respectively connected with the tested pins and the power supply circuits;
the power supply pins are respectively connected with the power supply circuits and the power supply pins;
the system-on-chip determines a target power supply circuit in the at least two power supply circuits based on the first control signal and generates a second control signal to the target power supply circuit, and the power supply voltage output by the target power supply circuit is triggered to be transmitted to the power supply pin through the power supply pin.
The beneficial effects brought by the technical scheme provided by some embodiments of the application at least comprise:
in one or more embodiments of the present application, a display screen power supply system includes a motherboard and a display screen, the display screen includes a power pin, at least one tested pin and a signal circuit corresponding to each tested pin, the motherboard includes a detection pin corresponding to each tested pin, a system-on-chip, a power supply pin and at least two power supply circuits, wherein: each tested pin is respectively connected with the signal circuit corresponding to each tested pin and the detection pin corresponding to each tested pin; the system-on-chip is respectively connected with each tested pin and each power supply circuit; the power supply pins are respectively connected with the power supply circuits and the power supply pins; the system-on-chip determines a target power supply circuit in at least two power supply circuits based on the first control signal and generates a second control signal to the target power supply circuit, and the power supply voltage output by the target power supply circuit is triggered to be transmitted to the power supply pin through the power supply pin. The structure of the display screen is formed by the power supply pin, at least one tested pin and the signal circuit corresponding to each tested pin, the structure of the mainboard is formed by the power supply pin, at least one tested pin and the signal circuit corresponding to each tested pin, and the structure of the display screen power supply system is formed by the display screen and the mainboard.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a scene of a power supply system for a display screen according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a display screen power supply system according to an embodiment of the present application;
fig. 3 is a topology circuit diagram of a pull-up circuit involved in a power supply system for a display screen according to an embodiment of the present application;
fig. 4 is a topology circuit diagram of a pull-up circuit involved in a power supply system for a display screen according to an embodiment of the present application;
FIG. 5 is a schematic structural diagram of another power supply system for a display screen according to an embodiment of the present disclosure;
FIG. 6 is a schematic structural diagram of another power supply system for a display screen according to an embodiment of the present disclosure;
FIG. 7 is a schematic structural diagram of another power supply system for a display screen according to an embodiment of the present disclosure;
fig. 8 is a topology circuit diagram of a power supply circuit related to a power supply system for a display screen according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of another display screen power supply system provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present application, it is noted that, unless explicitly stated or limited otherwise, "including" and "having" and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The display screen power supply system in the embodiment of the present application can be applied to display devices, for example: a cathode ray tube display (CR), a light-emitting diode display (LED), an electronic ink panel, a Liquid Crystal Display (LCD), a Plasma Display Panel (PDP), and the like. The display device is installed on the electronic device, so that a user can view information such as displayed characters, images and videos by using the display device on the electronic device, wherein the electronic device can be a smart phone, a tablet computer, a game device, an Augmented Reality (AR) device, an automobile, a data storage device, an audio playing device, a video playing device, a notebook, a desktop computing device, a wearable device such as an electronic watch, electronic glasses, an electronic helmet, an electronic bracelet, an electronic necklace, electronic clothes and the like. The display equipment comprises a mainboard and a display screen, wherein multiple power supply sources are arranged in the mainboard, the type of the power supply voltage required by the display screen can be determined through a first control signal sent by a signal circuit in the display screen, so that the corresponding power supply sources are selected from the multiple power supply sources, and the power supply voltage is output to the display screen through the power supply sources.
According to some embodiments, fig. 1 shows a scene schematic diagram of a display screen power supply system, where the display screen power supply system includes a main board and a display screen a, where the main board includes a power supply circuit a and a power supply circuit B, a voltage output by the power supply circuit a is a power supply voltage of the display screen a, a voltage output by the power supply circuit B is a power supply voltage of the display screen B, the main board is connected to the display screen a in the display screen power supply system, and a first control signal a output by the display screen a is transmitted to the main board to enable the main board to determine the power supply circuit a corresponding to the display screen a, so as to output a second control signal
The present application will be described in detail with reference to specific examples.
In this embodiment of the present application, fig. 2 shows a schematic structural diagram of a display screen power supply system provided in this embodiment of the present application, a display screen power supply system 1 includes a motherboard 11 and a display screen 12, the display screen 12 includes a power pin 121, at least one tested pin 122, and a signal circuit 123 corresponding to each tested pin 122, the motherboard 11 includes a detection pin 111 corresponding to each tested pin 122, an on-chip system chip 112, a power supply pin 113, and at least two power supply circuits 114, where:
each tested pin 122 is respectively connected with the signal circuit 123 corresponding to each tested pin 122 and the detection pin 111 corresponding to each tested pin 122, the soc chip 112 is respectively connected with each tested pin 122 and each power supply circuit 114, and the power supply pin 113 is respectively connected with each power supply circuit 114 and the power supply pin 121;
the first control signal output by each signal circuit 123 is transmitted to the soc chip 112 through the tested pin 122 corresponding to each signal circuit 123 and the detection pin 111 corresponding to each tested pin 122, so that the soc chip 112 determines a target power supply circuit of the at least two power supply circuits 123 based on the first control signal and generates a second control signal to be transmitted to the target power supply circuit, and the second control signal triggers the power supply voltage output by the target power supply circuit to be transmitted to the power supply pin 121 through the power supply pin 114.
Specifically, the main board 11 refers to a circuit board provided with a main circuit system in the display power supply system, and the main circuit system may be a system-on-chip 112. In the embodiment of the present application, the motherboard 11 includes a detection pin 111, a power supply circuit 114, and a power supply pin 113. It is understood that a System On Chip (SOC) chip 112 refers to a chip integrated with a complete system and grouping all or part of necessary electronic circuits, wherein the complete system may include a Central Processing Unit (CPU), a memory, and peripheral circuits.
The detection pin 111 is a pin for connecting with the tested pin 122 of the display 12 and receiving a first control signal output by the tested pin 122, and meanwhile, the detection pin 111 is connected with the system-on-chip 112, and the first control signal can be transmitted to the system-on-chip 112 through the detection pin 111.
The power supply pin 113 is a pin for connecting with the power supply pin 121 of the display 12 and sending a power supply voltage to the power supply pin 121, and meanwhile, the power supply pin 113 is connected with the power supply circuit 114 and can receive the power supply voltage output by the power supply circuit 114 through the power supply pin.
The power supply circuit 114 is a circuit used for supplying power to a preset display screen in the motherboard 11, where the preset display screen is a display screen of a power supply model corresponding to the power supply voltage of each power supply circuit in the motherboard circuit, for example, two power supply circuits are provided in the motherboard, where one power supply circuit outputs a 5V power supply voltage, and the other power supply circuit outputs a 12V power supply voltage, and then the preset display screen includes a display screen of which the power supply specification is 5V and a display screen of which the power supply specification is 12V. It will be readily appreciated that the predetermined display comprises the display 12.
It should be noted that the display 12 refers to a display connected to the motherboard 11 in displays of different power supply models, and the motherboard can supply power to the display 12. The power pin 121 may be connected to the power pin 113, so that the power pin 113 transmits the power voltage to the display 12 via the power pin 121.
The tested pin 122 is a pin for connecting with the signal circuit 123 of the display 12 and receiving the first control signal output by the signal circuit 123, and meanwhile, the tested pin 122 is connected with the detection pin 111, and the first control signal can be transmitted to the detection pin 111 through the tested pin 122.
The signal circuit 123 is a circuit capable of outputting a first control signal to the detected pin 122. The first control signal is a signal for controlling the soc chip 112 to select the power supply circuit corresponding to the first control signal, and may be a high level signal or a low level signal, or may be multiple high level signals and/or multiple low levels.
In the embodiment of the present application, the signal circuit may be a pull-up circuit or a pull-down circuit. The pull-up circuit is a circuit which clamps an output signal at a high level through a pull-up resistor, so that a first control signal of the high-level signal can be output. The pull-down circuit is a circuit that clamps an output signal at a low level through a pull-down resistor, and is a first control signal that can output a high-level signal.
Fig. 3 shows a topological circuit diagram of a pull-up circuit related to a display screen power supply system according to an embodiment of the present application, and as shown in fig. 3, the pull-up circuit includes a signal power supply and a pull-up resistor, where an output terminal of the signal power supply is connected to one end of the pull-up resistor, and the other end of the pull-up resistor is connected to a corresponding tested pin of the pull-up circuit.
Fig. 4 shows a topology circuit diagram of a pull-down circuit related to a power supply system for a display screen according to an embodiment of the present application, where, as shown in fig. 4, the pull-down circuit includes a pull-down resistor, where:
one end of the pull-down resistor is connected with a tested pin corresponding to the pull-down circuit, and the other end of the pull-down resistor is grounded.
According to some embodiments, the method for the soc chip 112 to select the power supply circuit corresponding to the first control signal may include: setting corresponding relations between different types of the first control signals and the power supply circuits, determining the target type of the first control signals when the first control signals are received, and determining the power supply circuits corresponding to the first control signals according to the target type and the corresponding relations.
Illustratively, when the motherboard 11 includes two power supply circuits 114 (power supply circuit 114A, power supply circuit 114B), the correspondence between the first control signal and the power supply circuit may be as shown in the following table:
| a first control signal | Power supply circuit |
| Low level signal | Power supply circuit 114A |
| High level signal | Power supply circuit 114B |
When the soc chip receives the first control signal corresponding to the low level signal, it may be determined that the power supply circuit is the power supply circuit 114A; when the soc chip receives the first control signal corresponding to the high level signal, it may be determined that the power supply circuit is the power supply circuit 114B. It should be noted that the display 12 includes a signal circuit 123 and a tested pin 122, and the main board 11 includes a testing pin 111. When the power supply voltage of the display screen 12 is the output voltage of the power supply circuit 114A, the signal circuit 123 is a pull-down circuit; when the supply voltage of the display screen 12 is the output voltage of the supply circuit, the signal circuit 123 is a pull-up circuit.
Illustratively, when the motherboard 11 includes three power supply circuits 114 (power supply circuit 114A, power supply circuit 114B, and power supply circuit 114C), the motherboard 11 may include two detection pins 113 (detection pin 113A, detection pin 113B), and the soc chip 112 receives the first control signal through the detection pin 113A and the detection pin 113B, so that the corresponding relationship between the first control signal and the power supply circuit may be as shown in the above table.
When the soc chip receives the first control signal corresponding to the low level signal, the power supply circuit may be determined to be the power supply circuit 114A; when the soc chip receives the first control signal corresponding to the low level signal and the high level signal, the power supply circuit may be determined to be the power supply circuit 114B; when the soc chip receives the first control signal corresponding to the high level signal, the power supply circuit may be determined as the power supply circuit 114C.
It should be noted that the display 12 includes two signal circuits 123 (a signal circuit 123A and a signal circuit 123B) and two pins 122 to be tested (a pin 122A to be tested and a pin 122B to be tested), and the main board 11 includes two detection pins 111 (a detection pin 111A and a detection pin 111B, where the detection pin 111A corresponds to the pin 122A to be tested and the detection pin 111B corresponds to the pin 122B to be tested). As shown in fig. 5, a possible configuration diagram of the display panel power supply system is that, when the power supply voltage of the display panel 12 is the output voltage of the power supply circuit 114A, the signal circuit 123A is a pull-down circuit and the signal circuit 123B is a pull-down circuit, so that the detection pin 111A detects a low level signal through the detected pin 122A, and the detection pin 111B detects a low level signal through the detected pin 122B, thereby receiving a first control signal corresponding to a low level signal-a low level signal.
As shown in fig. 6, a schematic structure of a possible power supply system for a display panel is shown, when the power supply voltage of the display panel 12 is the output voltage of the power supply circuit 114B, the signal circuit 123A is a pull-down circuit and the signal circuit 123B is a pull-down circuit, so that the detection pin 111A detects a low level signal through the detected pin 122A, and the detection pin 111B detects a high level signal through the detected pin 122A, thereby receiving a first control signal corresponding to the low level signal and the high level signal.
When the power supply voltage of the display panel 12 is the output voltage of the power supply circuit 114C, the signal circuit 123A is a pull-down circuit and the signal circuit 123B is a pull-up circuit, so that the detection pin 111A detects a low level signal through the detected pin 122A, and the detection pin 111B detects a high level signal through the detected pin 122B, thereby receiving the first control signal corresponding to the high level signal and the high level signal, as shown in fig. 7, a schematic structural diagram of a possible display panel power supply system.
According to some embodiments, when the target power supply circuit in the power supply circuit 114 can be determined according to the first control signal, in particular, as shown in fig. 8, the power supply circuit 114 includes a power supply VCC, a first resistor R1, a second resistor R3, a transistor Q1, and a PMOS transistor Q2, wherein:
the output end of the power supply VCC is connected with one end of a first resistor R1 and the source electrode of a PMOS tube Q2, the other end of the first resistor R1 is connected with one end of a second resistor R2 and the collector electrode of a triode Q1, the base electrode of the triode Q1 is connected with the system-on-chip 112, one end of the emitter electrode of the triode Q1 is grounded, the other end of the second resistor R2 is connected with the gate electrode of the PMOS tube Q2, and the drain electrode of the PMOS tube Q2 is connected with the power supply pin 113.
Specifically, in the case that the power supply circuit 114 is controlled not to supply power, the soc chip 112 does not output the second control signal to the power supply circuit; in case of controlling the power supply circuit to supply power, the soc chip 112 outputs a second control signal to the power supply circuit.
It should be noted that the second control signal may be a high level signal, when the soc chip 112 does not output the high level signal to the power supply circuit, a base of the transistor Q1 in the power supply circuit is at a low level and cannot meet the turn-on requirement, and the transistor Q1 is in a cut-off state, so that a source voltage of the PMOS transistor is equal to a drain voltage and cannot meet the turn-on requirement, and the PMOS transistor Q1 is in the cut-off state, and thus the power supply cannot output the power supply voltage.
When the soc chip 112 outputs the high level signal to the power supply circuit, the base of the transistor Q1 in the power supply circuit is at a high level to satisfy the conduction requirement, the transistor Q1 is in a conduction state, so that the source voltage of the PMOS transistor is greater than the drain voltage to satisfy the conduction requirement, and the PMOS transistor is in a conduction state, so that the power supply can output the power supply voltage through the PMOS transistor.
The working principle of the power supply system for a display screen provided by the embodiment of the present application is described in a complete way with reference to fig. 6.
The display panel 12 includes a signal circuit 123A (pull-down circuit), a signal circuit 123B (pull-up circuit), the signal circuit 123A can output a high level signal to the pin 122A under test, the signal circuit 123B can output a low level signal to the pin 122B under test, wherein the first control signal includes a high level signal-low level signal, the detection pin 111A receives the high level signal output by the pin 122B under test and transmits the high level signal to the system-on-chip 112, the detection pin 111B receives the low level signal output by the pin 122B under test and transmits the low level signal to the system-on-chip 112, so that the system-on-chip receives the high level signal-low level signal (first control signal) and determines a target power supply circuit (power supply circuit 114B) in the power supply circuit 114 based on the high level signal-low level signal, and outputs a high level signal (a second control signal) to the power supply circuit 114B, so that the transistor Q1 in the power supply circuit 114B is turned on, and the transistor Q1 is turned on to turn on the PMOS transistor Q2, so that the power supply voltage output by the power supply in the power supply circuit 114B is transmitted to the power supply pin 113 via the PMOS transistor Q2, and then transmitted to the display 12 via the power supply pin 113 and the power supply pin 121.
Optionally, as shown in fig. 9, the motherboard further includes a filter capacitor C, wherein one end of the filter capacitor C is connected to the power supply pin 113, and the other end of the filter capacitor C is grounded, so that interferences such as noise clutter in the circuit can be filtered.
In the embodiment of the application, the power pin, at least one tested pin and the signal circuit corresponding to each tested pin form the structure of the display screen, the power pin, at least one tested pin and the signal circuit corresponding to each tested pin form the structure of the mainboard, and then the display screen and the mainboard form the structure of the display screen power supply system. Furthermore, a filter capacitor is arranged in the mainboard, so that interference such as noise clutter and the like in the circuit can be filtered
The embodiment of the application also provides a display device, and the electronic device comprises the display screen power supply system. The display device may be a cathode ray tube display, a light emitting diode display, an ion display panel, or the like. The display equipment with the display screen power supply system can determine the type of the power supply voltage required by the display screen through the first control signal sent by the signal circuit in the display screen, so that the corresponding power supply source is selected from multiple power supply sources, and the power supply voltage is output to the display screen through the power supply source.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.
Claims (10)
Translated fromChinesePriority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120892807.6UCN215956040U (en) | 2021-04-27 | 2021-04-27 | Display power supply system and display equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120892807.6UCN215956040U (en) | 2021-04-27 | 2021-04-27 | Display power supply system and display equipment |
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| Publication Number | Publication Date |
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| CN215956040Utrue CN215956040U (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120892807.6UActiveCN215956040U (en) | 2021-04-27 | 2021-04-27 | Display power supply system and display equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119673078A (en)* | 2024-11-18 | 2025-03-21 | 厦门天马显示科技有限公司 | Power supply control system and display device |
- 2021
- 2021-04-27CNCN202120892807.6Upatent/CN215956040U/enactiveActive
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119673078A (en)* | 2024-11-18 | 2025-03-21 | 厦门天马显示科技有限公司 | Power supply control system and display device |
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