LED all-in-one machine

Abstract

The utility model provides an LED all-in-one machine. The LED all-in-one machine comprises a power supply layer, a signal processing layer, a driving layer and an LED unit, the input of the power supply layer is used for being connected with a power supply; the output end of the power supply layer is connected with the power supply input end of the signal processing layer; the signal input end of the signal processing layer is used for inputting a switching signal, and the output end of the signal processing layer is in gating connection with the input end of the driving layer according to the switching signal; and the output end of the driving layer is connected with the LED unit. After a signal input end of a signal processing layer obtains a switching signal, a driving layer is gated; in the standby state, only power supply to the LED unit and the driving layer is cut off, so that most of circuit power consumption is reduced, and standby power consumption is reduced; but power supply of the power supply layer is not cut off, the signal processing layer still operates; therefore, data loading does not need to be carried out during awakening, the response is fast, the awakening pictures are kept synchronous, and the problem of picture asynchronization is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of LED control, in particular to an LED all-in-one machine. Background Art

[0002] In order to reduce the power consumption of LED all-in-one machines, a standby mode is usually set in the prior art. Standby mode means that the screen does not display any content temporarily and can be awakened by a remote control or other tool when needed.

[0003] Currently, there are several methods for achieving standby mode: 1. Displaying a black screen without actually turning off the display; however, the energy consumption of displaying a black screen on an all-in-one LED display or LED direct-display TV is comparable to that of playing a video, so standby mode consumes a significant amount of energy. 2. Turning off the power to all assembled LED cabinets during standby mode; while this method achieves low-power standby, it requires the internal signal processing chips to be powered on again after being woken up by a remote control, which takes a long time to reset. Furthermore, it is difficult to synchronize the startup of the internal signal processing chips between cabinets, resulting in inconsistent startup screens and image gaps. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an LED all-in-one machine, which reduces the standby power consumption of the LED all-in-one machine and avoids the problem of asynchronous startup screen.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] An all-in-one LED device comprises a power supply layer, a signal processing layer, a drive layer and an LED unit; the input of the power supply layer is used to connect to a power supply; the output end of the power supply layer is connected to the power input end of the signal processing layer; the signal input end of the signal processing layer is used to input a switching signal, and the output end of the signal processing layer is strobed and connected to the input end of the drive layer according to the switching signal; the output end of the drive layer is connected to the LED unit.

[0007] Furthermore, the signal processing layer includes a signal decoding unit, a state detection unit and an electronic switch unit; the input end of the signal decoding unit is used to receive the switching signal; the output end of the signal decoding unit is connected to the state input end of the state detection unit; the output end of the state detection unit is connected to the control input end of the electronic switch; the power input end of the electronic switch unit is connected to the output end of the power layer; and the output end of the electronic switch unit is strobed connected to the input end of the driving layer.

[0008] Furthermore, the electronic switch unit includes a first MOS tube and a second MOS tube; the gate of the first MOS tube is connected to the output end of the state detection unit; the drain of the first MOS tube is connected to the gate of the second MOS tube and the output end of the power supply layer; the drain of the second MOS tube is connected to the input end of the driving layer; the source of the first MOS tube and the source of the second MOS tube are grounded respectively.

[0009] Furthermore, the electronic switch unit also includes a first resistor, a second resistor and a third resistor; one end of the first resistor is connected to the output end of the state detection unit, and the other end of the first resistor is connected to the gate of the first MOS tube; one end of the second resistor is connected to the output end of the power supply layer, and the other end of the second resistor is respectively connected to one end of the third resistor, the drain of the first MOS tube and the gate of the second MOS tube; the other end of the third resistor is grounded.

[0010] Furthermore, the LED unit includes light sources of different voltage types; the power supply layer includes sub-voltage output terminals corresponding to the number of light source types; the signal processing layer includes electronic switch units corresponding to the number of light source types; each of the electronic switch units is respectively connected to the sub-voltage output terminal and the light source.

[0011] Furthermore, the signal processing layer further includes a test switch unit; the test switch unit is connected to the test input terminal of the state detection unit, and the test switch unit is used to generate the switch signal to turn on the electronic switch unit.

[0012] Furthermore, the test switch includes a switch element, a fourth resistor and a fifth resistor; the fixed end of the switch element is respectively connected to the test input end of the state detection unit, one end of the fourth resistor and one end of the fifth resistor; the other end of the fourth resistor is connected to the output end of the power supply layer; the other end of the fifth resistor and the toggle end of the switch element are respectively grounded.

[0013] Furthermore, the driving layer includes a row driver, a column driver, and a signal and power interface; the input end of the signal and power interface is connected to the output end of the signal processing layer; the output end of the signal and power interface is connected to the input end of the row driver and the input end of the column driver respectively; the output end of the row driver and the output end of the column driver are connected to the row input and column input of the LED unit respectively.

[0014] Furthermore, it also includes a standby button; the standby button is used to generate the switch signal and send it to the signal input end of the signal processing layer.

[0015] Furthermore, it also includes a remote control receiving unit; the remote control receiving unit is used to receive the switch signal generated by the external device and send it to the signal input end of the signal processing layer.

[0016] The beneficial effects of the present invention are: the driving layer is selected after obtaining the switching signal from the signal input end of the signal processing layer; that is, in the standby state, only the power supply to the LED unit and the driving layer is cut off, thereby reducing most of the circuit power consumption and lowering the standby power consumption; but the power supply to the power supply layer is not cut off, and the signal processing layer is still running; therefore, data loading is not required when waking up, and the fast response enables the wake-up screen to remain synchronized, avoiding the problem of screen asynchrony. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a display module in an LED all-in-one machine according to an embodiment of the present invention;

[0018] Figure 2 This is a circuit diagram of a signal processing layer in an LED all-in-one machine according to an embodiment of the present invention;

[0019] Figure 3 This is a structural diagram of an LED all-in-one machine in an embodiment of the present utility model;

[0020] Figure 4 This is a flowchart of the standby mode steps of an LED all-in-one machine in an embodiment of the present utility model;

[0021] Figure 5 This is a flowchart of the wake-up mode steps of an LED all-in-one machine in an embodiment of the present utility model;

[0022] Description of labels:

[0023] 1. Power supply layer; 2. Signal processing layer; 3. Drive layer; 4. LED unit; Q1, first MOS tube; Q2, second MOS tube; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; S1, switch. DETAILED DESCRIPTION

[0024] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

[0025] Please refer to Figure 1, an LED all-in-one machine, including a power supply layer, a signal processing layer, a driving layer and an LED unit; the input of the power supply layer is used to connect to the power supply; the output end of the power supply layer is connected to the power input end of the signal processing layer; the signal input end of the signal processing layer is used to input a switching signal, and the output end of the signal processing layer is connected to the input end of the driving layer according to the switching signal; the output end of the driving layer is connected to the LED unit.

[0026] From the above description, it can be seen that the beneficial effects of the present invention are: the driving layer is selected after obtaining the switching signal from the signal input end of the signal processing layer; that is, in the standby state, only the power supply to the LED unit and the driving layer is cut off, thereby reducing most of the circuit power consumption and reducing the standby power consumption; but the power supply to the power supply layer is not cut off, and the signal processing layer is still running; therefore, data loading is not required during wake-up, and the fast response keeps the wake-up screen synchronized, avoiding the problem of screen asynchrony.

[0027] Furthermore, the signal processing layer includes a signal decoding unit, a state detection unit and an electronic switch unit; the input end of the signal decoding unit is used to receive the switching signal; the output end of the signal decoding unit is connected to the state input end of the state detection unit; the output end of the state detection unit is connected to the control input end of the electronic switch; the power input end of the electronic switch unit is connected to the output end of the power layer; and the output end of the electronic switch unit is strobed connected to the input end of the driving layer.

[0028] From the above description, it can be seen that the signal processing unit is composed of a signal decoding unit, a state detection unit and an electronic switch unit. The decoding unit obtains the switching signal and outputs it to the state detection unit for controlling the switching state of the electronic switch unit, thereby realizing power supply control of the driving layer and the LED unit.

[0029] Furthermore, the electronic switch unit includes a first MOS tube and a second MOS tube; the gate of the first MOS tube is connected to the output end of the state detection unit; the drain of the first MOS tube is connected to the gate of the second MOS tube and the output end of the power supply layer; the drain of the second MOS tube is connected to the input end of the driving layer; the source of the first MOS tube and the source of the second MOS tube are grounded respectively.

[0030] From the above description, it can be seen that the electronic switch unit is composed of the first MOS tube and the second MOS tube, so that the power supply switch control of the driving layer and the LED unit can be achieved by controlling the on or off state of the first MOS tube and the second MOS tube.

[0031] Furthermore, the electronic switch unit also includes a first resistor, a second resistor and a third resistor; one end of the first resistor is connected to the output end of the state detection unit, and the other end of the first resistor is connected to the gate of the first MOS tube; one end of the second resistor is connected to the output end of the power supply layer, and the other end of the second resistor is respectively connected to one end of the third resistor, the drain of the first MOS tube and the gate of the second MOS tube; the other end of the third resistor is grounded.

[0032] It can be seen from the above description that by providing the first resistor, the second resistor and the third resistor, the power supply and switch control effects of the circuit on the first MOS transistor and the second MOS transistor are more stable.

[0033] Furthermore, the LED unit includes light sources of different voltage types; the power supply layer includes sub-voltage output terminals corresponding to the number of light source types; the signal processing layer includes electronic switch units corresponding to the number of light source types; each of the electronic switch units is respectively connected to the sub-voltage output terminal and the light source.

[0034] It can be seen from the above description that by providing corresponding electronic switch units for light sources of different voltage types, the switching states of different light sources can be effectively controlled.

[0035] Furthermore, the signal processing layer further includes a test switch unit; the test switch unit is connected to the test input terminal of the state detection unit, and the test switch unit is used to generate the switch signal to turn on the electronic switch unit.

[0036] From the above description, it can be seen that by setting up a test switch unit, it can be used for quality inspection during production operations, such as for testing a single cabinet that has not yet been cascaded and spliced. By turning on the test switch, the power supply of the LED unit and the driver layer can be turned on even when there is no video signal.

[0037] Furthermore, the test switch includes a switch element, a fourth resistor and a fifth resistor; the fixed end of the switch element is respectively connected to the test input end of the state detection unit, one end of the fourth resistor and one end of the fifth resistor; the other end of the fourth resistor is connected to the output end of the power supply layer; the other end of the fifth resistor and the toggle end of the switch element are respectively grounded.

[0038] It can be seen from the above description that the test switch composed of the switch element, the fourth resistor and the fifth resistor can generate a corresponding test signal according to actual needs.

[0039] Furthermore, the driving layer includes a row driver, a column driver, and a signal and power interface; the input end of the signal and power interface is connected to the output end of the signal processing layer; the output end of the signal and power interface is connected to the input end of the row driver and the input end of the column driver respectively; the output end of the row driver and the output end of the column driver are connected to the row input and column input of the LED unit respectively.

[0040] It can be seen from the above description that by arranging the row driver and the column driver to power the LED unit, the LED unit can realize a predetermined display mode.

[0041] Furthermore, it also includes a standby button; the standby button is used to generate the switch signal and send it to the signal input end of the signal processing layer.

[0042] As can be seen from the above description, by setting a standby button, the standby and wake-up control of the LED all-in-one machine can be achieved through button operation.

[0043] Furthermore, it also includes a remote control receiving unit; the remote control receiving unit is used to receive the switch signal generated by the external device and send it to the signal input end of the signal processing layer.

[0044] It can be seen from the above description that by providing a remote control receiving unit, the standby and wake-up control of the LED all-in-one machine can be achieved through remote control.

[0045] The LED all-in-one machine provided by the present invention can be applied to LED all-in-one machines based on LED direct display splicing screen technology, and can also be applied to products such as LED TVs. The following is an explanation of the specific implementation methods:

[0046] Example 1

[0047] Please refer to Figure 1An all-in-one LED device includes a power supply layer 1, a signal processing layer 2, a driver layer 3, and LED units 4. The input of the power supply layer 1 is used to connect to a power source, converting the input mains electricity into the direct current required by each module to achieve AC-DC conversion. For example, the LED unit 4 includes a 2.8V-powered red LED lamp bead / chip and a 3.8V-powered green and blue lamp bead / chip. The DC output of the power supply layer 1 includes two outputs, one 3.8V and one 2.8V, to accommodate common-cathode drive of the LED lamp beads, thereby achieving energy conservation. The output end of the power supply layer 1 is connected to the power input end of the signal processing layer 2; the signal input end of the signal processing layer 2 is used to input a switching signal, and the output end of the signal processing layer 2 is connected to the input end of the driver layer 3 according to the switching signal; the output end of the driver layer 3 is connected to the LED unit 4. Among them, the driving layer 3 includes a signal and power interface, a row driver and a column driver; the input end of the signal and power interface is connected to the output end of the signal processing layer 2; the output end of the signal and power interface is connected to the input end of the row driver and the input end of the column driver respectively; the output end of the row driver and the output end of the column driver are connected to the row input and column input of the LED unit 4 respectively.

[0048] Please refer to Figure 2 The signal processing layer 2 includes a signal decoding unit, a state detection unit, an electronic switch unit, a test switch unit, and a signal and power interface. The input of the signal decoding unit is used to receive a switch signal. The output of the signal decoding unit is connected to the state input of the state detection unit. The output of the state detection unit is connected to the control input of the electronic switch. The power input of the electronic switch unit is connected to the output of the power layer 1. The output of the electronic switch unit is strobed and connected to the input of the driver layer 3. Specifically, the signal decoding unit outputs a state signal based on the presence or absence of a video signal. The state detection unit obtains the corresponding state signal. The state detection unit detects the video output signal and, when the presence or absence of a video signal is detected, outputs a control signal to control the opening or closing of the electronic switch, thereby connecting and disconnecting the DC power supply. Simultaneously, the signal decoding unit is responsible for decoding the video signal. The decoded signal is provided to the next-level LED unit 4 and driver layer 3 through an interface. This signal, based on the wiring arrangement of the LED driver chip, can directly provide a drive signal for the LED constant current driver. The signal and power interface is a physical connector hard-connected interface, which serves to connect the signal and power supply of the LED unit 4 and the driving layer 3, and also serves to locate the position of the LED unit 4.

[0049] In an optional embodiment, the electronic switch unit includes a first MOS transistor Q1, a second MOS transistor Q2, a first resistor R1, a second resistor R2 and a third resistor R3; one end of the first resistor R1 is connected to the output end of the state detection unit, and the other end of the first resistor R1 is connected to the gate of the first MOS transistor Q1; one end of the second resistor R2 is connected to the output end of the power supply layer 1, and the other end of the second resistor R2 is respectively connected to one end of the third resistor R3, the drain of the first MOS transistor Q1 and the gate of the second MOS transistor Q2; the other end of the third resistor R3 is grounded; the drain of the second MOS transistor Q2 is connected to the input end of the driving layer 3; the source of the first MOS transistor Q1 and the source of the second MOS transistor Q2 are respectively grounded; the signal processing layer 2 includes electronic switch units corresponding to the number of light source types; each electronic switch unit is respectively connected to the sub-voltage output end and the light source. Figure 2 As shown, it includes two groups of electronic switch units, one for 3.8V output and the other for 2.8V output.

[0050] The test switch unit is connected to the test input of the status detection unit and is used to generate a switch signal to turn on the electronic switch unit. It is used for quality inspection during production operations, typically for testing individual cabinets that have not yet been cascaded. Turning on the test switch can also turn on the power to the LED unit 4 and the driver layer 3 even when there is no video signal. Specifically, the test switch includes a switch element S1, a fourth resistor R4, and a fifth resistor R5. The fixed end of the switch element S1 is respectively connected to the test input of the status detection unit, one end of the fourth resistor R4, and one end of the fifth resistor R5. The other end of the fourth resistor R4 is connected to the output of the power layer 1. The other end of the fifth resistor R5 is grounded.

[0051] In an alternative embodiment, please refer to Figure 3The aforementioned all-in-one LED device includes a control module and a display module; the display module includes an LED housing composed of the aforementioned power supply layer 1, signal processing layer 2, driver layer 3, and LED units 4; the LED housings can be connected to each other. During standby mode, the control module and the LED housing's power supply layer 1 and signal processing layer 2 remain powered, while the LED units 4 and driver layer 3 are disconnected from the power supply. During wakeup, all power supplies are connected. The difference between an all-in-one LED device and an LED display screen is that the LED all-in-one's OPS (Open Pluggable Specification) or Android interface is integrated into the product, while an LED display screen requires an external connection. This technical solution is also applicable to LED displays, requiring only a computer or other terminal to set the standby mode to disable video outputs such as HDMI. In other words, in this embodiment, there is no need to set a dedicated data line for commands; only the HDMI image signal line is utilized. The HDMI output is disabled during standby mode, and the signal processing provided in the back-end housing automatically detects the presence of HDMI signals, thereby intelligently controlling the on / off of the LED lamp beads and the constant current driver. In other words, standby mode / wakeup mode is achieved by controlling the HDMI signal output status via Android / OPS.

[0052] The standby command can be implemented through the standby button on the machine or the remote control. The specific working principle is as follows:

[0053] Please refer to Figure 4 In standby mode, the control module of the LED all-in-one machine shuts down the HDMI video signal output, and no video signal reaches the LED display through the network cable. At this point, the decoding result of the decoding unit indicates no video signal, and no data is distributed to the LED unit 4 and the driver layer 3. Simultaneously, the video decoder outputs status information indicating no video signal, and outputs level information indicating no video signal via the State pin (outputting a low level three times every 0.5 seconds). The state detection unit's input pin PC5 is connected to the State output pin, and reads the level information of the State pin in real time. If the detected state is a low level input three times every 0.5 seconds, it is identified as a state without an HDMI video signal. At this point, a power shutdown control signal is output via pin PB5, which controls the shutdown of the first MOS transistor Q1 and, therefore, the DC power supply. This embodiment simultaneously controls the shutdown of both electronic switch units, cutting off both the 3.8V and 2.8V outputs.

[0054] Please refer to Figure 5In wake-up mode, the LED all-in-one control module will output an HDMI video signal. The decoding unit distributes the decoded video data to the LED unit 4 and the driver layer 3. The video decoder also outputs information about the presence of a video signal. The status detection unit detects a low-level input every second, indicating the presence of an HDMI video signal. Pin PB5 of the status detection unit then outputs a power-on control signal, thereby turning on the DC power supply and enabling both the 3.8V and 2.8V outputs.

[0055] In test mode: When the test switch is closed, the PC2 pin (test input) of the status detection unit detects this signal. At this point, the status detection unit output pin PB5 outputs a power-on control signal, turning on the MOS tubes of the electronic switch unit, thereby enabling both the 3.8V and 2.8V outputs. At the same time, the test switch is located on the periphery of the status detection unit, allowing the test mode to maintain continuous power supply during the production testing of independent boxes.

[0056] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. An LED all-in-one machine, characterized in that: Including power supply layer, signal processing layer, driver layer and LED unit; The input of the power layer is used to connect to a power source; The output end of the power supply layer is connected to the power input end of the signal processing layer; The signal input end of the signal processing layer is used to input a switching signal, and the output end of the signal processing layer is strobed and connected to the input end of the driving layer according to the switching signal; The output end of the driving layer is connected to the LED unit.

2. The LED all-in-one machine according to claim 1, characterized in that: The signal processing layer includes a signal decoding unit, a state detection unit and an electronic switch unit; The input end of the signal decoding unit is used to receive the switching signal; The output terminal of the signal decoding unit is connected to the state input terminal of the state detection unit; The output end of the state detection unit is connected to the control input end of the electronic switch; The power input terminal of the electronic switch unit is connected to the output terminal of the power layer; The output end of the electronic switch unit is strobed connected to the input end of the driving layer.

3. The LED all-in-one machine according to claim 2, characterized in that: The electronic switch unit includes a first MOS tube and a second MOS tube; The gate of the first MOS transistor is connected to the output end of the state detection unit; The drain of the first MOS transistor is connected to the gate of the second MOS transistor and the output end of the power supply layer; The drain of the second MOS tube is connected to the input end of the driving layer; The source of the first MOS transistor and the source of the second MOS transistor are grounded respectively.

4. The LED all-in-one machine according to claim 3, characterized in that: The electronic switch unit further includes a first resistor, a second resistor and a third resistor; One end of the first resistor is connected to the output end of the state detection unit, and the other end of the first resistor is connected to the gate of the first MOS transistor; One end of the second resistor is connected to the output end of the power supply layer, and the other end of the second resistor is respectively connected to one end of the third resistor, the drain of the first MOS transistor, and the gate of the second MOS transistor; The other end of the third resistor is grounded.

5. The LED all-in-one machine according to claim 2, characterized in that: The LED unit includes light sources of different voltage types; The power supply layer includes sub-voltage output terminals corresponding to the number of light source types; The signal processing layer includes electronic switch units corresponding in number to the types of light sources; Each of the electronic switch units is connected to the sub-voltage output terminal and the light source respectively.

6. The LED all-in-one machine according to claim 2, characterized in that: The signal processing layer also includes a test switch unit; The test switch unit is connected to the test input terminal of the state detection unit, and the test switch unit is used to generate the switch signal to turn on the electronic switch unit.

7. The LED all-in-one machine according to claim 6, characterized in that: The test switch includes a switch element, a fourth resistor and a fifth resistor; The fixed end of the switch element is respectively connected to the test input end of the state detection unit, one end of the fourth resistor and one end of the fifth resistor; The other end of the fourth resistor is connected to the output end of the power supply layer; The other end of the fifth resistor and the toggle end of the switch are grounded respectively.

8. The LED all-in-one machine according to claim 1, characterized in that: The driving layer includes row driving, column driving, and signal and power supply interfaces; The input end of the signal and power interface is strobed connected to the output end of the signal processing layer; The output end of the signal and power interface is connected to the input end of the row driver and the input end of the column driver respectively; The row driver output terminal and the column driver output terminal are connected to the row input terminal and the column input terminal of the LED unit respectively.

9. The LED all-in-one machine according to claim 1, characterized in that: Also includes a standby button; The standby button is used to generate the switch signal and send it to the signal input end of the signal processing layer.

10. The LED all-in-one machine according to claim 1, characterized in that: Also includes a remote control receiving unit; The remote control receiving unit is used to receive the switch signal generated by the external device and send it to the signal input end of the signal processing layer.

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