Display device

Abstract

The utility model provides a display device, a power supply control circuit and a sampling circuit are arranged in the display device, the sampling circuit samples the operation voltage and the operation current of the display device, and the power supply control circuit determines the power supply condition of a power supply adapter circuit and the power consumption condition of the display device based on the operation voltage and the operation current. Therefore, the brightness of the light source can be regulated and controlled in time through the main control circuit and the light source driving circuit so as to adjust the power consumption condition of the display equipment, the power consumption condition is matched with the power supply condition of the power supply adaptation circuit, it is guaranteed that the display equipment cannot be powered down due to mismatching of power consumption and power supply, and stable operation of the display equipment is guaranteed.

Description

Technical Field

[0001] Embodiments of the present application relate to display technology. More specifically, it relates to a display device. Background Art

[0002] The display device is connected to the mains power supply through a power adapter circuit. The power adapter circuit converts the mains electrical signal provided by the mains power supply into a power supply electrical signal to supply power to the display device.

[0003] When the mains fluctuates or the power adapter does not match, the power consumption of the display device will affect the voltage value of the mains electrical signal output by the power adapter circuit, affecting the stable operation of the display device.

[0004] How to ensure the power supply stability of the display device has become the focus of research. Summary of the Utility Model

[0005] Embodiments of the present application provide a display device, aiming to solve the above technical problems.

[0006] The present application provides a display device. The display device is electrically connected to the mains power supply through a power adapter circuit. The power adapter circuit is configured to obtain a mains electrical signal and output a power supply electrical signal;

[0007] The display device includes:

[0008] A main control circuit, electrically connected to the power adapter circuit, configured to obtain the power supply electrical signal and output a first control signal;

[0009] A light source driving circuit, electrically connected to the power adapter circuit and the main control circuit, configured to obtain the power supply electrical signal and the first control signal and output a first driving signal;

[0010] A light source, electrically connected to the light source driving circuit, configured to receive the first driving signal and emit light of a first brightness; the light source includes a laser light source or a backlight assembly;

[0011] A display component, configured to obtain the light provided by the light source and display a picture;

[0012] The display device further includes:

[0013] A sampling circuit, electrically connected to the power adapter circuit, the light source driving circuit, and the main control circuit, configured to obtain the power supply electrical signal and output a sampling electrical signal. The sampling electrical signal includes at least one of a sampling voltage and a sampling current;

[0014] A power supply control circuit, electrically connected to the main control circuit and the sampling circuit, configured to obtain the sampling electrical signal and output a second control signal;

[0015] The main control circuit is further configured to obtain the second control signal and the power supply signal, and output a third control signal;

[0016] The light source driving circuit is further configured to obtain the third control signal and output a second driving signal;

[0017] The light source is further configured to obtain the second driving signal and emit light with a second brightness; the second brightness is different from the first brightness.

[0018] In some possible embodiments, the display device further includes an energy storage circuit, the energy storage circuit includes a battery pack, and an output end of the energy storage circuit is electrically connected to the sampling circuit;

[0019] A first interface is provided at an input end of the display device, a second interface is provided at an output end of the power supply adaptation circuit, and the energy storage circuit is electrically connected to the first interface;

[0020] The power supply adaptation circuit is configured to obtain the power supply signal and a first trigger signal when the first interface and the second interface are electrically connected, and output the power supply signal provided by the power supply adaptation circuit;

[0021] The energy storage circuit is further configured to obtain a second trigger signal and output the power supply signal provided by the battery pack when the first interface and the second interface are disconnected.

[0022] In some possible embodiments, the energy storage circuit includes:

[0023] A battery control circuit, which is electrically connected to the first interface of the energy storage circuit and is configured to output a fourth control signal from its first output end when obtaining the first trigger signal;

[0024] It is further configured to output a fifth control signal from its first output end when obtaining the second trigger signal;

[0025] A switching circuit, which is electrically connected to the first interface, the battery control circuit, and is coupled to the main control circuit, and is configured to output the power supply signal when obtaining the power supply signal and the fourth control signal;

[0026] When obtaining the power supply signal and the fifth control signal, the power supply signal is not output.

[0027] In some possible embodiments, the energy storage circuit further includes a charging control circuit;

[0028] The second output terminal and the third output terminal of the battery control circuit are electrically connected to the charging control circuit, and are configured to output a sixth control signal from the second output terminal and a seventh control signal from the third output terminal when the first trigger signal is obtained, until the second trigger signal is obtained;

[0029] The charging control circuit is further electrically connected to the output terminal of the first switch and the battery pack, and is configured to output a charging signal to charge the battery pack when the sixth control signal, the seventh control signal, and the power supply signal are obtained.

[0030] In some feasible embodiments, the power supply control circuit is electrically connected to the battery control circuit and is configured to output a first configuration signal;

[0031] The battery control circuit is configured to output the sixth control signal and the seventh control signal when the first configuration signal and the first trigger signal are obtained.

[0032] In some feasible embodiments, the charging control circuit includes:

[0033] A first transistor, whose first end is electrically connected to the output terminal of the switch circuit, and whose control end is electrically connected to the second output terminal of the battery control circuit;

[0034] A second transistor, whose first end is electrically connected to the second end of the first transistor, and whose control end is electrically connected to the third output terminal of the battery control circuit;

[0035] An inductor, whose first end is electrically connected to the second end of the first transistor, and whose second end is electrically connected to the battery pack.

[0036] In some feasible embodiments, the energy storage circuit further includes a discharge control circuit;

[0037] The fourth output terminal of the battery control circuit is electrically connected to the discharge control circuit, and is configured to output an eighth control signal from the fourth output terminal when the second trigger signal is obtained;

[0038] The discharge control circuit is further electrically connected to the battery pack and the output terminal of the energy storage circuit, and is configured to obtain a battery electrical signal from the battery pack and output the power supply signal when the eighth control signal is obtained.

[0039] In some feasible embodiments, the battery pack is electrically connected to the power supply control circuit and is configured to output the state signal of the battery pack;

[0040] The power supply control circuit is electrically connected to the battery control circuit and is configured to obtain the state signal of the battery pack and output a second configuration signal;

[0041] The battery control circuit is configured to output the eighth control signal when obtaining the second configuration signal and the second trigger signal.

[0042] In some possible embodiments, the discharge control circuit includes:

[0043] A third transistor, whose first end is electrically connected to the output end of the switch circuit, whose control end is electrically connected to the fourth output end of the battery control circuit, and whose second end is electrically connected to the battery pack.

[0044] In some possible embodiments, a chopper circuit is electrically connected between the energy storage circuit and the main control circuit.

[0045] The present application provides a display device. A power supply control circuit and a sampling circuit are provided in the display device. The sampling circuit samples the operating voltage and operating current of the display device. The power supply control circuit determines the power supply situation of the power supply adaptation circuit and the power consumption situation of the display device based on the operating voltage and operating current. Thus, the brightness of the light source can be regulated in a timely manner through the main control circuit and the light source driving circuit to adjust the power consumption situation of the display device and match it with the power supply situation of the power supply adaptation circuit, ensuring that the display device will not lose power due to mismatched power consumption and power supply, and ensuring the stable operation of the display device. Description of the Drawings

[0046] To more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0047] Figure 1 It is an application scenario diagram of a projection device according to some embodiments;

[0048] Figure 2 It is a schematic structural diagram of a display device according to some embodiments;

[0049] Figure 3 It is a schematic structural diagram of a display device according to some other embodiments;

[0050] Figure 4 It is a schematic flowchart of a control method for a display device according to some embodiments;

[0051] Figure 5 It is a schematic flowchart of a control method for a display device according to some other embodiments;

[0052] Figure 6 It is a schematic structural diagram of a display device according to some other embodiments;

[0053] Figure 7 Schematic structural diagram of a display device according to some other embodiments;

[0054] Figure 8 Schematic structural diagram of a display device according to some other embodiments;

[0055] Figure 9 Schematic flowchart of a charging control method for an energy storage circuit according to some other embodiments;

[0056] Figure 10 Schematic flowchart of a discharging control method for an energy storage circuit according to some other embodiments.

[0057] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0058] Description of reference numerals:

[0059] 00 - Mains power supply; 10 - Power adapter circuit; 11 - Display device; 1001 - Laser projection device; 1002 - Projection screen; 1003 - Intelligent device; 1004 - Server; 1005 - Control device; 01 - Main control circuit; 02 - Light source drive circuit; 03 - Light source; 04 - Display component; 20 - Power supply control circuit; 30 - Sampling circuit; 40 - Energy storage circuit; 41 - Switching circuit; 42 - Battery control circuit; 43 - Charging control circuit; 44 - Discharging control circuit; 45 - Battery pack; L1 - Inductor; R1 - First resistor; R2 - Second resistor; R3 - Third resistor; A - First voltage sampling point; B - Second voltage sampling point; C - Voltage sampling terminal; D - First interface; E - First output terminal; F - Second output terminal; G - Third output terminal; H - Fourth output terminal; 50 - Chopper circuit; Q1 - First transistor; Q2 - Second transistor; Q3 - Third transistor; Q4 - Fourth transistor; Q5 - Fifth transistor. Detailed description of specific embodiments

[0060] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0061] It should be noted that in this document, the terms "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined based on their explanations in the specific embodiments or further in combination with the context of the specific embodiments. It should be further understood that the terms "including" and "comprising" indicate the presence of features, steps, operations, elements, components, items, types, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups.

[0062] In the description of the present disclosure, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, the meaning of "a plurality of" is two or more unless otherwise specifically defined. The terms "or" and "and / or" are interpreted inclusively and mean any one or any combination. Thus, "A, B or C" or "A, B and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B and C". An exception to this definition occurs only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way.

[0063] To make the objectives, implementation manners and advantages of the present application clearer, the following will clearly and completely describe the exemplary implementation manners of the present application with reference to the accompanying drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0064] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the implementation manners described hereinafter, and is not intended to limit the implementation manners of the present application. Unless otherwise specified, these terms should be understood in their ordinary and general meanings.

[0065] Figure 1 The following is an application scenario diagram of a display device provided by the present application according to an exemplary embodiment, as Figure 1As shown, the user can operate the display device 11 through the smart device 1003 or the control device 1005, so that the display device 11 displays images or videos.

[0066] In some embodiments, the display device 11 may be a liquid crystal display device, including a liquid crystal display panel and a backlight panel. The backlight provided by the backlight panel is projected onto the liquid crystal display panel and passes through the liquid crystal molecules with a preset rotation angle on the liquid crystal display panel to display images or videos.

[0067] In some embodiments, the display device 11 may be a direct display device, including a plurality of pixels and corresponding pixel driving circuits. The pixel driving circuits drive the pixels to emit light to display images or videos. Among them, the pixels include light emitting diodes.

[0068] In some embodiments, the display device 11 may be a laser display device, including a laser projection device 1001 and a curtain 1002. The user can operate the laser projection device 1001 through the smart device 1003 or the control device 1005 to project images or videos onto the curtain 1002 for display.

[0069] In some embodiments, the number of laser projection devices 1001 may be multiple. When the laser projection system projects a projection image onto the curtain 1002, each laser projection device 1001 projects a part of the projection picture of the projection image onto the curtain 1002, and an overlapping area is set in adjacent two images to display the same image to achieve the connection of the images. The complete projection image is formed by splicing multiple projection pictures on the curtain 1002.

[0070] In some embodiments, the control device 1005 may be a remote control. The communication between the remote control and the display device 11 includes infrared protocol communication or Bluetooth protocol communication, and other short-distance communication methods, and the display device 11 is controlled in a wireless or wired manner. The user can input user instructions through buttons on the remote control, voice input, control panel input, etc. to control the display device 11.

[0071] In some embodiments, the smart device 1003 (such as a mobile terminal, a tablet computer, a computer, a laptop, etc.) can also be used to control the display device 11. For example, an application program running on the smart device 1003 is used to control the display device 11.

[0072] In some embodiments, the display device 11 may not receive instructions using the above-mentioned smart device 1003 or control device 1005, but receive user control through gestures, etc.

[0073] In some embodiments, the display device 11 can also be controlled in ways other than the control device 1005 and the smart device 1003. For example, it can directly receive the user's voice commands for control through a module for obtaining voice commands configured inside the display device 11, or receive the user's voice commands for control through a voice control device externally provided for the laser projection device 1001.

[0074] In some embodiments, the display device 11 also communicates with the server 1004. The display device 11 is allowed to communicate and connect through a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 1004 can provide various contents and interactions to the display device 11. The server 1004 can be a cluster or multiple clusters, and can include one or more types of server devices.

[0075] Figure 2 As a schematic structural diagram of a display device according to some embodiments, as Figure 2 shown, the display device 11 is electrically connected to the mains power supply 00 through the power adapter circuit 10. The power adapter circuit 10 is configured to obtain the mains electrical signal and output a power supply electrical signal;

[0076] Among them, the power adapter circuit 10 includes an AC-DC conversion circuit. The mains electrical signal is an alternating current signal, and the power supply electrical signal is a direct current signal.

[0077] In some embodiments, the display device 11 may include a main control circuit 01. The main control circuit 01 is electrically connected to the power adapter circuit 10 and is configured to obtain the power supply electrical signal and output a first control signal;

[0078] Among them, the main control circuit 01 is a circuit for running the system of the display device 11, which can obtain display data and convert the display data into driving data; the first control signal includes driving data;

[0079] The main control circuit 01 can also process the obtained voice signals and gesture signals, configure each input / output interface, and manage the signals transmitted by each input / output interface.

[0080] In some embodiments, the display device 11 may include a light source driving circuit 02, which is electrically connected to the power adapter circuit 10 and the main control circuit 01, and is configured to obtain the power supply electrical signal and the first control signal and output a first driving signal;

[0081] In some embodiments, the display device 11 may include a light source 03, which is electrically connected to the light source driving circuit 02 and is configured to receive the first driving signal and emit light of a first brightness; among them, the first driving signal includes a signal for adjusting the brightness of the light source 03.

[0082] Among them, the light source 03 includes a laser light source or a backlight assembly;

[0083] In some embodiments, the display device 11 may include a display component 04, configured to obtain the light provided by the light source 03 and display a picture;

[0084] When the light source 03 is a laser light source and the display device 11 is a laser projection device 1001, the display component 04 includes a light valve and a projection lens. Among them, the light valve is a device that regulates the projection angle of laser data, thereby adjusting the light intensity passing through the projection lens. In some embodiments, the light valve includes a digital micro-mirror device (DMD).

[0085] When the light source 03 is a backlight assembly and the display device 11 is a liquid crystal display device, the display component 04 includes a liquid crystal display panel. The liquid crystal display panel includes a plurality of liquid crystal molecules. By adjusting the deflection angle of the liquid crystal molecules, the intensity of the passing backlight is adjusted to adjust the brightness of the displayed picture.

[0086] During the power-on process of the above-mentioned display device 11, the voltage value of the power supply electrical signal output by the power supply adaptation circuit 10 is affected by the voltage value of the mains electrical signal it obtains, the power consumption of the display device 11, and also by its own operating conditions. When there are mains fluctuations or the power adapter is not matched, the power consumption situation of the display device 11 will affect the voltage value of the mains electrical signal output by the power supply adaptation circuit 10, affecting the stable operation of the display device 11.

[0087] How to ensure the power supply stability of the display device has become the focus of research.

[0088] To solve the above technical problems, the present application provides a display device. The technical concept of the present application is: a power supply control circuit and a sampling circuit are provided in the display device. The sampling circuit samples the operating voltage and operating current of the display device. The power supply control circuit determines the power supply situation of the power supply adaptation circuit and the power consumption situation of the display device based on the operating voltage and operating current, so as to timely regulate the brightness of the light source through the main control circuit and the light source drive circuit, thereby adjusting the power consumption situation of the display device to match the power supply situation of the power supply adaptation circuit, ensuring that the display device will not lose power due to mismatched power consumption and power supply, and ensuring the stable operation of the display device.

[0089] Figure 3 For the structural schematic diagram of the display device according to some embodiments, the following will refer to Figure 3 , and explain the circuit structure of the display device provided by the present application.

[0090] In some embodiments, the display device 11 may include a main control circuit 01, electrically connected to the power supply adaptation circuit 10, configured to obtain a power supply electrical signal and output a first control signal;

[0091] Among them, the main control circuit 01 includes circuit structures such as a main control board, a video processing circuit, and an audio processing circuit. Among them, the main control board includes a main control chip, and the main control chip is a chip that runs the device control system.

[0092] The power supply electrical signal is the voltage value after the voltage conversion of the power supply adaptation circuit 10 is completed;

[0093] The first control signal is a signal for the power supply adaptation circuit 10 to regulate the light source driving circuit 02 to drive the light source 03 to emit light.

[0094] In some embodiments, the projection device may include a light source driving circuit 02, which is electrically connected to the power supply adaptation circuit 10 and the main control circuit 01, and is configured to obtain a power supply electrical signal and a first control signal, and output a first driving signal;

[0095] In some embodiments, the projection device may include a light source 03, which is electrically connected to the light source driving circuit 02, and is configured to receive the first driving signal and emit light of a first brightness; the light source 03 includes a laser light source or a backlight assembly;

[0096] In some embodiments, the projection device may include a display component 04, which is configured to obtain the light provided by the light source 03 and display a picture;

[0097] Among them, the light source driving circuit 02 is a circuit for driving the light source 03 to emit light. The first driving signal is a signal for adjusting the brightness of the light source 03.

[0098] In some embodiments, the light source 03 is a laser light source, and the light source driving circuit 02 is a laser light source driving circuit, which is configured to regulate the brightness of the laser beam generated by the laser light source.

[0099] In some embodiments, the light source 03 is a backlight assembly on the backlight board, the backlight assembly includes light-emitting diodes, and the light source driving circuit 02 is a backlight driver on the backlight board, which is configured to regulate the brightness of the backlight generated by the backlight assembly.

[0100] In some embodiments, the projection device may include a sampling circuit 30, which is electrically connected to the power supply adaptation circuit 10, the light source driving circuit 02, and the main control circuit 01, and is configured to obtain a power supply electrical signal and output a sampling electrical signal, and the sampling electrical signal includes at least one of a sampling voltage and a sampling current;

[0101] Among them, the sampling current is the sum of the power consumption currents of the power-consuming components in the display device 11, and the power-consuming components in the display device 11 include the main control circuit 01 and the light source driving circuit 02.

[0102] The sampling voltage is the power supply voltage for the main control circuit 01 and the light source drive circuit 02 in the display device 11. Among them, the power supply voltage of the main control circuit 01 is the same as that of the light source drive circuit 02.

[0103] In some embodiments, the projection device may include a power supply control circuit 20, which is electrically connected to the main control circuit 01 and the sampling circuit 30, and is configured to obtain a sampling electrical signal and output a second control signal;

[0104] Among them, the second control signal includes a control signal for controlling the main control circuit 01 to adjust the brightness of the light source 03;

[0105] In some embodiments, the second control signal includes a control signal for reducing the brightness of the light source 03.

[0106] In some embodiments, the main control circuit 01 is further configured to obtain the second control signal and the power supply electrical signal and output a third control signal;

[0107] Among them, the third control signal includes a signal for regulating the light emission brightness data of the light source drive circuit 02.

[0108] In some embodiments, the light source drive circuit 02 is further configured to obtain the third control signal and output a second drive signal;

[0109] Among them, the second drive signal is a signal for driving the light emission brightness of the light source 03.

[0110] In some embodiments, the second drive signal includes an adjusted drive current value.

[0111] In some embodiments, the light source 03 is further configured to obtain the second drive signal and emit light of a second brightness; the second brightness is different from the first brightness.

[0112] In the above circuit structure, the display device samples the operating voltage and operating current of the display device by setting a sampling circuit, and also sets a power supply control circuit, so that the power supply control circuit determines the power supply situation of the power supply adaptation circuit and the power consumption situation of the display device based on the operating voltage and operating current. Thus, the brightness of the light source can be regulated in a timely manner through the main control circuit and the light source drive circuit to adjust the power consumption situation of the display device and match it with the power supply situation of the power supply adaptation circuit, ensuring that the display device will not lose power due to mismatched power consumption and power supply, and ensuring the stable operation of the display device.

[0113] Next, based on Figure 3 the circuit structure shown, the operation process of the display device 11 will be explained.

[0114] When the power supply control circuit 20 regulates the brightness of the light source 03 based on the sampling voltage, its control method is as Figure 4 shown, and the steps of the control method include:

[0115] S101. Obtain a sampled voltage.

[0116] Among them, the sampled voltage is the power supply voltage of the main control circuit 01 and the light source driving circuit 02.

[0117] In some embodiments, multiple sampled voltage values within a historical period including the current moment can be averaged to prevent misoperation caused by interference signals in the electrical signal or unstable power supply of the mains power supply 00.

[0118] In some embodiments, the circuit structure of the sampled voltage can refer to Figure 3 the circuit structure shown, including a second resistor R2 and a third resistor R3. The first end of the second resistor R2 is electrically connected to the output end of the power supply adaptation circuit 10. The first end of the third resistor R3 is electrically connected to the second end of the second resistor R2. The second end of the third resistor R3 is grounded. The first end of the third resistor R3 is electrically connected to the voltage sampling terminal C of the power supply control circuit 20. The power supply control circuit 20 is used to obtain a sampled voltage value through the voltage sampling terminal C. Among them, the ratio of the sampled voltage value to the voltage value at the output end of the power supply adaptation circuit 10 is the ratio of the third resistor R3 to the sum of the two resistors.

[0119] S102. Determine whether the sampled voltage is less than a first preset voltage threshold.

[0120] When the sampled voltage is less than the first preset voltage threshold, the power supply voltage of the main control circuit 01 and the light source driving circuit 02 is relatively low and is not sufficient to support the luminous brightness of the light source 03, thus affecting the stable operation of the device.

[0121] If the sampled voltage is less than the first preset voltage threshold, proceed to step S103; otherwise, proceed to step S104.

[0122] S103. Reduce the brightness level of the light source.

[0123] In some embodiments, the brightness of the light source 03 can be adjusted by adjusting the drive current value of the light source 03. The darker the brightness of the light source 03, the smaller the drive current value.

[0124] The brightness level of the light source 03 corresponds to the drive current value. Different brightness levels of the light source 03 correspond to different drive current values.

[0125] S104. Control the light source to emit light according to the current brightness level.

[0126] When the power supply control circuit 20 adjusts the brightness of the light source 03 based on the sampled current, its control method is as Figure 5 shown, and the steps of the control method include:

[0127] S201. Obtain a sampled current.

[0128] The sampled current is the sum of the operating currents of the main control circuit 01, the light source driving circuit 02, and the electrical devices electrically connected to their respective back ends.

[0129] In some embodiments, multiple sampled current values within a historical period including the current moment can be averaged to prevent misoperation caused by interference signals in the electrical signal or unstable power supply of the mains power supply 00.

[0130] In some embodiments, the circuit structure for sampling the voltage can refer to Figure 3 the circuit structure shown, including a first resistor R1, and the resistance value of the first resistor R1 is much smaller than the equivalent resistances generated by the main control circuit 01, the light source driving circuit 02, and their respective subsequent circuits.

[0131] The first resistor R1 is serially electrically connected between the power supply adaptation circuit 10 and the main control circuit 01. The first end of the first resistor R1 is electrically connected to the first voltage sampling point A of the power supply control circuit 20, and the second end is electrically connected to the second voltage sampling point B of the power supply control circuit 20. The power supply control circuit 20 is configured to determine the current value for supplying power to the main control circuit 01 and the light source driving circuit 02 based on the voltage difference between the first voltage sampling point A and the second voltage sampling point B and the resistance value of the first resistor R1.

[0132] S202. Determine whether the sampled current is greater than a preset current threshold.

[0133] When the sampled current is greater than the first preset voltage threshold, the power consumption of the main control circuit 01 and the light source driving circuit 02 is high, and the power consumption current is large, which may cause the power supply adaptation circuit 10 to perform circuit protection, resulting in power loss of the display device 11.

[0134] If the sampled current is greater than the preset current threshold, go to step S203; otherwise, go to step S204.

[0135] S203. Reduce the level of the light source brightness.

[0136] S204. Control the light source to emit light according to the current brightness level.

[0137] In some embodiments, the current and voltage can also be measured simultaneously and regulated simultaneously, and the control logic is the same as the above control method.

[0138] In some embodiments, the display device 11 further includes an energy storage circuit 40. The circuit structure of the energy storage circuit 40 will be explained below with reference to Figure 6 and Figure 7 .

[0139] In some embodiments, the energy storage circuit 40 includes a battery pack 45, and the output terminal of the energy storage circuit 40 is electrically connected to the sampling circuit 30;

[0140] The battery pack 45 can be charged using the power supply electrical signal after the power supply adaptation circuit 10 outputs the power supply electrical signal, and can also discharge after the power supply adaptation circuit 10 is abnormal or disconnected and does not output the power supply electrical signal, to supply power to the main control circuit 01, the light source driving circuit 02, and subsequent components.

[0141] In some embodiments, a first interface D is provided at the input end of the display device 11, a second interface is provided at the output end of the power supply adaptation circuit 10, and the energy storage circuit 40 is electrically connected to the first interface D;

[0142] The power supply adaptation circuit 10 is configured to obtain a power supply electrical signal and a first trigger signal and output the power supply electrical signal provided by the power supply adaptation circuit 10 when the first interface D and the second interface are electrically connected;

[0143] The energy storage circuit 40 is further configured to obtain a second trigger signal and output the power supply electrical signal provided by the battery pack 45 when the first interface D and the second interface are disconnected.

[0144] Wherein, the first interface D and the second interface can be electrically connected by plugging.

[0145] In some embodiments, the first trigger signal is a signal generated after the second interface of the power supply adaptation circuit 10 is inserted.

[0146] In some other embodiments, the first trigger signal is a signal sent by the power supply control circuit 20 when the sampled voltage value by the sampling circuit 30 is greater than the power-on voltage threshold. Wherein, the power supply control circuit 20 is electrically connected to the energy storage circuit 40.

[0147] In some embodiments, the energy storage circuit 40 includes:

[0148] A battery control circuit 42, which is electrically connected to the first interface D of the energy storage circuit 40 and is configured to output a fourth control signal from its first output terminal E when obtaining the first trigger signal;

[0149] It is further configured to output a fifth control signal from its first output terminal E when obtaining the second trigger signal;

[0150] Wherein, the fourth control signal is a control signal for controlling the conduction of the circuit between the power supply adaptation circuit 10 and the sampling circuit 30, and the fifth control signal is a control signal for controlling the disconnection of the circuit between the power supply adaptation circuit 10 and the sampling circuit 30.

[0151] In some embodiments, the energy storage circuit 40 includes:

[0152] The switch circuit 41 is electrically connected to the first interface D and the battery control circuit 42, and is coupled to the main control circuit 01. When the power supply electrical signal and the fourth control signal are obtained, the power supply electrical signal is output.

[0153] When the power supply electrical signal and the fifth control signal are obtained, the power supply electrical signal is not output.

[0154] Then the fourth control signal is the control signal for turning on the switch circuit 41, and the fifth control signal is the control signal for turning off the switch circuit 41.

[0155] In some embodiments, the switch circuit 41 includes a Buck switching power supply circuit.

[0156] In some embodiments, the switch circuit 41 includes a first switch component and a second switch component connected in series.

[0157] The first switch component includes a first controllable switch device, the second switch component includes a second controllable switch device, and a diode is anti-parallel connected to the second controllable switch device.

[0158] The control terminals of the first controllable switch device and the second controllable switch device are both electrically connected to the first output terminal E of the power supply control circuit, and the conduction directions of the first controllable switch device and the second controllable switch device are opposite.

[0159] In some embodiments, the first controllable switch device includes a fourth transistor Q4, the second controllable switch device includes a fifth transistor Q5, and two diodes are anti-parallel connected between the gate and source electrodes of the two transistors. The conduction direction of the fourth transistor Q4 is the same as the transmission direction of the system power signal, and is opposite to the conduction direction of the fifth transistor Q5. The above two controllable switch devices can define the transmission direction of the power supply electrical signal during the power supply process and prevent voltage backflow when the battery pack 45 supplies power.

[0160] In some embodiments, the energy storage circuit 40 further includes a charging control circuit 43.

[0161] The second output terminal F and the third output terminal G of the battery control circuit 42 are electrically connected to the charging control circuit 43. When the first trigger signal is obtained, the sixth control signal is output from the second output terminal F, and the seventh control signal is output from the third output terminal G until the second trigger signal is obtained.

[0162] The charging control circuit 43 is also electrically connected to the output terminal of the first switch and the battery pack 45, and is configured to output a charging signal to charge the battery pack 45 when the sixth control signal, the seventh control signal, and the power supply electrical signal are obtained.

[0163] In some embodiments, the charging control circuit 43 includes:

[0164] A first transistor Q1, having its first end electrically connected to the output end of a switching circuit 41 and its control end electrically connected to a second output end F of a battery control circuit 42;

[0165] A second transistor Q2, having its first end electrically connected to the second end of the first transistor Q1 and its control end electrically connected to a third output end G of the battery control circuit 42;

[0166] An inductor L1, having its first end electrically connected to the second end of the first transistor Q1 and its second end electrically connected to a battery pack 45.

[0167] During the energy storage stage of the charging process, after the first transistor Q1 obtains a sixth control signal, it conducts, and the second transistor Q2 turns off. The first transistor Q1 and the inductor L1 construct a charging path between the power supply adaptation circuit 10 and the battery pack 45 to charge the battery pack 45, and at the same time store energy in the inductor L1.

[0168] During the freewheeling stage of the charging process, the first transistor Q1 turns off, and the second transistor Q2 conducts. The energy-storing inductor L1, the battery pack 45, and the second transistor Q2 construct a freewheeling loop to continue charging the battery pack 45 along the current direction of the energy storage stage.

[0169] In some embodiments, a power supply control circuit 20 is electrically connected to the battery control circuit 42 and is configured to output a first configuration signal;

[0170] The battery control circuit 42 is configured to output a sixth control signal and a seventh control signal when obtaining the first configuration signal and a first trigger signal.

[0171] Wherein, the first configuration signal is a signal for regulating the magnitude of the charging current value of the power supply control circuit 20.

[0172] In some embodiments, the battery control circuit 42 can regulate the conduction duration of the first transistor Q1 and the second transistor Q2 by adjusting the duration of the sixth control signal and the seventh control signal it outputs, so as to adjust the charging current value.

[0173] In some embodiments, the energy storage circuit 40 further includes a discharge control circuit 44;

[0174] A fourth output end H of the battery control circuit 42 is electrically connected to the discharge control circuit 44 and is configured to output an eighth control signal from the fourth output end H when obtaining a second trigger signal;

[0175] The discharge control circuit 44 is further electrically connected to the battery pack 45 and the output end of the energy storage circuit 40 and is configured to obtain a battery electrical signal from the battery pack 45 and output a power supply electrical signal when obtaining the eighth control signal.

[0176] Among them, the eighth control signal is a signal for controlling the conduction of the battery discharge control circuit 44.

[0177] In some embodiments, the battery pack 45 is electrically connected to the power supply control circuit 20 and is configured to output a status signal of the battery pack 45;

[0178] The power supply control circuit 20 is electrically connected to the battery control circuit 42 and is configured to obtain the status signal of the battery pack 45 and output a second configuration signal;

[0179] The battery control circuit 42 is configured to output an eighth control signal when obtaining the second configuration signal and the second trigger signal.

[0180] Among them, the second configuration signal is a signal for regulating the battery discharge condition.

[0181] In some embodiments, the discharge control circuit 44 includes:

[0182] A third transistor Q3, whose first end is electrically connected to the output end of the switch circuit 41, whose control end is electrically connected to the fourth output end H of the battery control circuit 42, and whose second end is electrically connected to the battery pack 45, is configured to conduct when obtaining the eighth control signal and otherwise turn off.

[0183] In some embodiments, a chopper circuit 50 is electrically connected between the energy storage circuit 40 and the main control circuit 01, as Figure 8 shown.

[0184] Among them, the chopper circuit 50 is a Buck - Boost circuit and is configured to output a stable voltage signal. Regardless of whether the battery voltage is higher than the system power supply voltage or lower than the power supply voltage at this time, the Buck - Boost output voltage maintains a stable value.

[0185] The charge - discharge control method of the energy storage circuit 40 will be specifically explained below.

[0186] Figure 9 FIG. is a schematic flowchart of the charging control method of the energy storage circuit according to some other embodiments, as Figure 9 shown, and includes:

[0187] S301. After the first interface of the power supply adaptation circuit is electrically connected to the second interface of the energy storage circuit, the battery control circuit obtains a first trigger signal.

[0188] This first trigger signal indicates that the power supply adaptation circuit 10 is inserted into the display device 11.

[0189] S302. The battery control circuit outputs a sixth control signal and a seventh control signal based on the first trigger signal to control the charging of the battery pack by the charging control circuit.

[0190] S303. The power supply control circuit sends a first configuration signal to the battery control circuit, so that the battery control circuit controls the charging current of the charging control circuit to be a preset current based on the first configuration signal.

[0191] In some embodiments, the preset current is the minimum charging current.

[0192] S304. The power supply control circuit obtains a sampled voltage and a sampled current.

[0193] In some embodiments, the power supply control circuit 20 starts to obtain the sampled voltage and the sampled current only after the initialization of the display device 11 is completed.

[0194] S305. The power supply control circuit determines whether the sum of the sampled current and the preset charging current is less than the load current.

[0195] In some embodiments, the load current is the drawn current measured and determined by the power adapter circuit 10, and is less than the rated output current of the power adapter circuit 10.

[0196] If so, it means that the power consumption current of the display device 11 and the charging current of the battery pack 45 have not reached the load upper limit of the power adapter circuit 10, and proceed to step S307; otherwise, proceed to step S306.

[0197] S306. The power supply control circuit determines whether the sampled voltage is greater than a first preset voltage threshold.

[0198] If so, it means that the current system power supply voltage has not reached the standard for the system to drive the light source 03 to emit light according to the preset brightness, and it is necessary to proceed to step S308 to reduce the charging current and use more current for the system operation of driving the display device 11 and the light source 03 to emit light; otherwise, proceed to step S309.

[0199] S307. Gradually increase the charging current to the preset charging current.

[0200] In some embodiments, the value of the charging current increased each time is a preset current difference. For example: 500 mA.

[0201] After increasing the charging current by one level, proceed to step S304 to perform the next round of current monitoring until the condition in step S306 is met.

[0202] S308. Charge with the current charging current.

[0203] S309. Gradually reduce the charging current.

[0204] After reducing the charging current by one level, proceed to step S304 to perform the next round of current monitoring until the condition in step S306 is met.

[0205] Figure 10 Schematic diagram of the discharge control method of the energy storage circuit according to some other embodiments, as Figure 10 shown, including:

[0206] S401. After the first interface of the voltage regulating circuit and the second interface of the energy storage circuit are disconnected, a second trigger signal is output.

[0207] This second trigger signal represents the signal that the power supply adaptation circuit 10 is disconnected from the display device 11.

[0208] S402. The battery control circuit outputs an eighth control signal based on the second trigger signal to control the discharge control circuit 44 to output the electrical signal stored in the battery pack.

[0209] That is, after the power supply adaptation circuit 10 is disconnected, the battery pack 45 is switched to supply power to the main control circuit 01 and the light source driving circuit 02.

[0210] S403. The power supply control circuit obtains the battery pack power.

[0211] S404. Determine whether the battery pack power is greater than a preset power threshold.

[0212] If so, go to step S405; otherwise, go to step S406.

[0213] S405. Keep the current light source emission brightness unchanged.

[0214] Since the power of the battery pack 45 is greater than the preset power threshold, it means that the power of the battery pack 45 can support the light source 03 to emit light according to the user-set parameters.

[0215] S406. The power supply control circuit obtains the battery pack voltage.

[0216] When the battery power is relatively low, due to the existence of the battery internal resistance, the load change of the system (such as operations like the user adjusting the brightness to the maximum and the sound to the maximum) will suddenly pull down the battery voltage, resulting in system power-off, and the power will not change suddenly, causing the display device 11 to detect the power-off situation inaccurately. Therefore, the power-off situation is determined by detecting the voltage of the battery pack 45.

[0217] S407. The power supply control circuit controls the light source driving circuit through the main control circuit to adjust the light source brightness corresponding to the preset voltage range where the battery pack voltage is located.

[0218] In some embodiments, battery voltage thresholds Vbth1, Vbth2, Vbth3, etc. are set, corresponding to different brightness levels respectively. For example, when it is detected that the battery voltage ≤ Vbth1, the brightness level is set to 9, and when the battery voltage > Vbth1 and the battery voltage ≤ Vbth2, the brightness level is set to 8. Among them, the larger the threshold value, the larger the current value.

[0219] S408. Determine whether the battery pack voltage is less than the second preset voltage threshold.

[0220] If so, proceed to step S409; otherwise, proceed to step S406 to continue monitoring the voltage change of the battery pack 45.

[0221] S409. The power supply control circuit sends indication information so that the main control circuit controls the display device to shut down after outputting the stored data.

[0222] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0223] For the sake of convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A display device (11), the display device (11) being electrically connected to a mains power supply (00) via a power adapter circuit (10), the power adapter circuit (10) being configured to obtain a mains power signal and output a power supply signal; The display device (11) comprises: A main control circuit (01) is electrically connected to the power adapter circuit (10) and is configured to obtain the power supply electrical signal and output a first control signal; The light source driving circuit (02) is electrically connected to the power adapter circuit (10) and the main control circuit (01), and is configured to obtain the power supply electrical signal and the first control signal, and output a first driving signal; A light source (03) is electrically connected to the light source driving circuit (02) and is configured to receive the first driving signal and emit light of a first brightness; the light source (03) comprises a laser light source or a backlight assembly; A display component (04) is configured to obtain light provided by the light source (03) and display a picture; Characterized in that the display device (11) further comprises: A sampling circuit (30) is electrically connected to the power adapter circuit (10), the light source driving circuit (02), and the main control circuit (01), and is configured to obtain the power supply electrical signal and output a sampling electrical signal, wherein the sampling electrical signal includes at least one of a sampling voltage and a sampling current; A power supply control circuit (20) is electrically connected to the main control circuit (01) and the sampling circuit (30), and is configured to obtain the sampled electrical signal and output a second control signal; The main control circuit (01) is further configured to obtain the second control signal and the power supply signal, and output a third control signal; The light source driving circuit (02) is further configured to obtain the third control signal and output a second driving signal; The light source (03) is further configured to receive the second driving signal and emit light of a second brightness; the second brightness is different from the first brightness.

2. The display device (11) according to claim 1, characterized in that The display device (11) further comprises an energy storage circuit (40), the energy storage circuit (40) comprises a battery pack (45), and an output end of the energy storage circuit (40) is electrically connected to the sampling circuit (30); The input end of the display device (11) is provided with a first interface (D), the output end of the power adapter circuit (10) is provided with a second interface, and the energy storage circuit (40) is electrically connected to the first interface (D); The power adapter circuit (10) is configured to obtain the power supply electrical signal and the first trigger signal when the first interface (D) and the second interface are electrically connected, and output the power supply electrical signal provided by the power adapter circuit (10); The energy storage circuit (40) is further configured to obtain a second trigger signal and output a power supply electrical signal provided by the battery pack (45) when the first interface (D) and the second interface are disconnected.

3. The display device (11) according to claim 2, characterized in that The energy storage circuit (40) comprises: A battery control circuit (42) is electrically connected to the first interface (D) of the energy storage circuit (40), and is configured to output a fourth control signal from its first output terminal (E) when receiving the first trigger signal; is also configured to output a fifth control signal from its first output terminal (E) when the second trigger signal is obtained; A switch circuit (41) is electrically connected to the first interface (D) and the battery control circuit (42), coupled to the main control circuit (01), and configured to output the power supply signal when obtaining the power supply signal and the fourth control signal; When the power supply electrical signal and the fifth control signal are obtained, the power supply electrical signal is not output.

4. The display device (11) according to claim 3, characterized in that The energy storage circuit (40) further includes a charging control circuit (43); The second output terminal (F) and the third output terminal (G) of the battery control circuit (42) are electrically connected to the charging control circuit (43), and are configured to output a sixth control signal from the second output terminal (F) and a seventh control signal from the third output terminal (G) when the first trigger signal is obtained, until the second trigger signal is obtained; The charging control circuit (43) is also electrically connected to the output end of the first switch and the battery pack (45), and is configured to output a charging signal to charge the battery pack (45) when the sixth control signal, the seventh control signal and the power supply signal are obtained.

5. The display device (11) according to claim 4, characterized in that The power supply control circuit (20) is electrically connected to the battery control circuit (42) and is configured to output a first configuration signal; The battery control circuit (42) is configured to output the sixth control signal and the seventh control signal when the first configuration signal and the first trigger signal are obtained.

6. The display device (11) according to claim 4 or 5, characterized in that The charging control circuit (43) comprises: A first transistor (Q1), a first end of which is electrically connected to the output end of the switch circuit (41), and a control end of which is electrically connected to the second output end (F) of the battery control circuit (42); a second transistor (Q2), a first end of which is electrically connected to the second end of the first transistor (Q1), and a control end of which is electrically connected to a third output end (G) of the battery control circuit (42); An inductor (L1), a first end of which is electrically connected to the second end of the first transistor (Q1), and a second end of which is electrically connected to the battery pack (45).

7. The display device (11) according to claim 4, characterized in that The energy storage circuit (40) further includes a discharge control circuit (44); The fourth output terminal (H) of the battery control circuit (42) is electrically connected to the discharge control circuit (44), and is configured to output an eighth control signal from the fourth output terminal (H) when the second trigger signal is obtained; The discharge control circuit (44) is also electrically connected to the battery pack (45) and the output end of the energy storage circuit (40), and is configured to obtain a battery electrical signal from the battery pack (45) and output the power supply electrical signal when the eighth control signal is obtained.

8. The display device (11) according to claim 7, characterized in that The battery pack (45) is electrically connected to the power supply control circuit (20) and is configured to output a status signal of the battery pack (45); The power supply control circuit (20) is electrically connected to the battery control circuit (42), and is configured to obtain a status signal of the battery pack (45) and output a second configuration signal; The battery control circuit (42) is configured to output the eighth control signal when the second configuration signal and the second trigger signal are obtained.

9. The display device (11) according to claim 7 or 8, characterized in that The discharge control circuit (44) comprises: A third transistor (Q3) has a first end electrically connected to the output end of the switch circuit (41), a control end electrically connected to the fourth output end (H) of the battery control circuit (42), and a second end electrically connected to the battery pack (45).

10. The display device (11) according to any one of claims 2 to 5, or any one of claims 7 to 8, characterized in that: A chopper circuit (50) is electrically connected between the energy storage circuit (40) and the main control circuit (01).

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