Infrared signal receiving device, display panel and air conditioner

Abstract

The utility model discloses an infrared signal receiving device, a display panel and an air conditioner, and belongs to the technical field of air conditioners. The infrared signal receiving device comprises an infrared receiver; the switching circuit is arranged in a power supply loop of the infrared receiver; the photosensitive infrared detection circuit is configured to output a wake-up signal under the condition that infrared light is detected; the control unit is respectively connected with the switching circuit and the photosensitive infrared detection circuit, and is configured to receive the wake-up signal and send a power supply signal to the switching circuit; wherein under the condition that the infrared signal receiving device is in a standby state, the switching circuit is in an off state. The infrared receiver does not work when the infrared signal receiving device is in a standby state, and the infrared signal receiving device is awakened by adopting the photosensitive infrared detection circuit, so that the power consumption of the infrared signal receiving device in the standby state is reduced, and meanwhile, reliable awakening can be ensured.

Description

Technical Field

[0001] This application belongs to the field of air conditioning technology, and in particular relates to an infrared signal receiving device, a display panel, and an air conditioner. Background Technology

[0002] Energy saving in air conditioning is an industry trend, and standby energy saving is a key aspect. Air conditioners are typically equipped with infrared signal receivers to receive control signals from devices such as remote controls. Currently, these infrared signal receivers still consume some power in standby mode, making it impossible to achieve ultra-low standby power consumption for the entire air conditioner. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes an infrared signal receiving device, a display panel, and an air conditioner, wherein the infrared receiver does not work when the infrared signal receiving device is in standby mode, thereby reducing the power consumption of the infrared signal receiving device in standby mode.

[0004] In a first aspect, this application provides an infrared signal receiving device, comprising:

[0005] Infrared receiver;

[0006] A switching circuit is installed in the power supply circuit of the infrared receiver;

[0007] The photosensitive infrared detection circuit is configured to output a wake-up signal when infrared light is detected.

[0008] The control unit is connected to the switching circuit and the photosensitive infrared detection circuit respectively, and is configured to receive a wake-up signal and send a power supply signal to the switching circuit.

[0009] When the infrared signal receiving device is in standby mode, the switching circuit is in the off state.

[0010] According to one embodiment of this application, the photosensitive infrared detection circuit includes:

[0011] A photosensitive infrared switch circuit is configured to output a sensing signal when infrared light is detected.

[0012] An amplifier circuit is connected to both the photosensitive infrared switch circuit and the control unit, and is configured to amplify the sensing signal to provide a wake-up signal.

[0013] According to one embodiment of this application, the photosensitive infrared switch circuit includes:

[0014] A photosensitive infrared switch has a first electrode and a second electrode. The first electrode is connected to a first reference voltage node, and the second electrode of the photosensitive infrared switch is used to provide a sensing signal.

[0015] According to one embodiment of this application, the amplifier circuit includes a transistor, the collector of which is connected to a second reference voltage node, the base of which is connected to the second terminal of a photosensitive infrared switch, and the emitter of which is used to provide a wake-up signal.

[0016] According to one embodiment of this application, the amplifier circuit includes multiple stages of transistors, the collector of each transistor is connected to a third reference voltage node, the base of each transistor is connected to the emitter of the previous stage transistor, the base of the first stage transistor is connected to the second terminal of a photosensitive infrared switch, and the emitter of the last stage transistor is used to provide a wake-up signal.

[0017] According to one embodiment of this application, the photosensitive infrared switch is a photosensitive infrared diode or a photosensitive infrared transistor.

[0018] According to one embodiment of this application, the switching circuit includes a switching transistor, a first terminal of which is connected to a power supply node, a second terminal of which is connected to a power supply node of an infrared receiver, and a control terminal of which is connected to a control unit.

[0019] According to one embodiment of this application, the control unit includes an MCU, and the MCU has a built-in reset circuit.

[0020] Secondly, this application provides a display panel, which includes a communication circuit, an LED scanning circuit, and an infrared signal receiving device according to the aforementioned method. The infrared signal receiving device is connected to the communication circuit and the LED scanning circuit respectively.

[0021] When the infrared signal receiving device is in standby mode, both the communication circuit and the LED scanning circuit are in sleep mode.

[0022] Thirdly, this application provides an air conditioner, which includes the aforementioned display panel. According to the infrared signal receiving device, display panel, and air conditioner of this application, the infrared receiver does not operate when the infrared signal receiving device is in standby mode. A photosensitive infrared detection circuit is used to wake up the infrared signal receiving device, thereby reducing the power consumption of the infrared signal receiving device in standby mode while ensuring reliable wake-up.

[0023] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a schematic diagram of the structure of the infrared signal receiving device provided in the embodiments of this application;

[0026] Figure 2 This is a circuit topology diagram of the switching circuit provided in the embodiments of this application;

[0027] Figure 3 This is one of the topologies of the photosensitive infrared detection circuit provided in the embodiments of this application;

[0028] Figure 4 This is the second topology of the photosensitive infrared detection circuit provided in the embodiments of this application;

[0029] Figure 5 This is the third topology of the photosensitive infrared detection circuit provided in the embodiments of this application;

[0030] Figure 6 This is a schematic diagram of the structure of the air conditioner display panel provided in the embodiment of this application.

[0031] Figure label:

[0032] Infrared receiver 10, switching circuit 20, photosensitive infrared detection circuit 30, control unit 40, communication circuit 50, LED scanning circuit 60, photosensitive infrared diode D1, photosensitive infrared transistor J1, first to fourth transistors Q1 to Q4, first to second resistors R1 to R2. Detailed Implementation

[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0034] In the following description, a "circuit" refers to a conductive loop consisting of at least one element or sub-circuit connected by an electrical or electromagnetic link. When an element or circuit is said to be "coupled to" or "connected to" another element, or when an element / circuit is said to be "coupled at" or "connected at" two nodes, it can be directly coupled to or connected to the other element, or there may be intermediate elements. The connection between elements can be physical, logical, or a combination thereof. Conversely, when an element is said to be "directly coupled to" or "directly connected to" another element, it means that there are no intermediate elements between them.

[0035] In the description, the terms "first," "second," etc., are used to distinguish similar objects, not to describe a specific order or sequence. It should be understood that such numerical descriptors can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0036] Furthermore, the use of terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] Infrared signal receiving devices typically use infrared receivers to receive infrared signals to obtain operating commands and display relevant information. These devices can enter standby mode after a period of no infrared signal input, and will also shut down some circuit units to reduce power consumption. The infrared signals can be emitted by devices such as remote controls.

[0038] In related technologies, infrared signal receiving devices need to receive infrared signals through an infrared receiver to be woken up. Therefore, when the infrared signal receiving device is in standby mode, the infrared receiver is still in working mode. Because the infrared receiver includes signal structure circuits and signal demodulation circuits, its standby power is still relatively high, typically around 0.1W to 0.3W.

[0039] This application proposes an infrared signal receiving device and an air conditioner. The infrared receiver does not work when the infrared signal receiving device is in standby mode. A photosensitive infrared detection circuit is used to wake up the infrared signal receiving device, which reduces the power consumption of the infrared signal receiving device in standby mode and ensures reliable wake-up.

[0040] Reference Figure 1 , Figure 1The structure of an infrared signal receiving device is shown. One embodiment of this application proposes an infrared signal receiving device. In this embodiment, the infrared signal receiving device includes an infrared receiver 10, a switching circuit 20, a photosensitive infrared detection circuit 30, and a control unit 40. The switching circuit 20 is disposed in the power supply circuit of the infrared receiver 10; the photosensitive infrared detection circuit 30 is configured to output a wake-up signal when infrared light is detected; the control unit 40 is connected to both the switching circuit 20 and the photosensitive infrared detection circuit 30, and is configured to receive the wake-up signal and send a power supply signal to the switching circuit 20; wherein, when the infrared signal receiving device is in standby mode, the switching circuit 20 is in an off state.

[0041] The control unit 40 may include a controller, which may be implemented using an MCU (Microcontroller Unit) chip; or it may be implemented based on a DSP (Digital Signal Processor) chip, an FPGA (Field-Programmable Gate Array), or a custom controller chip; the embodiments of this application do not limit the specific hardware implementation of the controller.

[0042] As an example, the control unit uses an MCU with a built-in reset circuit. Infrared signal receivers typically require a reset circuit to enable restarting. This could involve generating a reset signal upon power-up to clear residual data from the MCU's internal registers, preventing interference from the previous operating state during the startup process, and could also include voltage anomaly protection or anti-interference recovery functions.

[0043] This embodiment integrates the reset function within the MCU, reducing the need for external circuitry and further lowering the power consumption of the infrared signal receiver. The MCU can implement the reset circuit based on built-in hardware such as voltage detection and watchdog timer. Mature technologies already exist for the specific structure of the reset circuit, and will not be elaborated upon here.

[0044] The switching circuit 20 is switched between an on state and an off state under the control of the control unit 40. When the switching circuit 20 is on, the power supply circuit of the infrared receiver 10 is powered, and the infrared receiver 10 works normally; when the switching circuit 20 is off, the power supply circuit of the infrared receiver 10 is not powered, the infrared receiver 10 does not work, and there is no power consumption.

[0045] When the infrared signal receiver enters standby mode, the control unit 40 can send a shutdown signal to the switching circuit 20, causing the switching circuit 20 to enter the off state, cutting off the infrared receiver and reducing power consumption. When the infrared signal receiver is woken up, the control unit 40 sends a power supply signal to the switching circuit 20, causing the switching circuit 20 to enter the conduction state, enabling the infrared receiver to work normally.

[0046] In some embodiments, the switching circuit 20 includes a switching transistor K, the first end of which is connected to a power supply node, the second end of which is connected to a power supply node of the infrared receiver 10, and the control terminal of which is connected to a control unit 40.

[0047] The switching transistor K can be a transistor, a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), or an IGBT (Insulated Gate Bipolar Transistor), etc. When the switching transistor K is turned on, the infrared receiver 10 is powered on; when the switching transistor K is turned off, the infrared receiver 10 is powered off.

[0048] Reference Figure 2 , Figure 2 A switching circuit topology is illustrated. As an example, the switching transistor is a bipolar junction transistor (BJT), the base of which is connected to the control unit 40. The power supply nodes of the infrared receiver 10 may include a positive node and a negative node, and the power supply nodes include a voltage node VCC and a ground node. The collector of the BJT is connected to the negative node, the emitter is connected to the ground node, and the positive node of the infrared receiver 10 is connected to the voltage node VCC. Of course, the switching transistor can also be positioned between the positive node and the voltage node VCC of the infrared receiver 10.

[0049] It should be noted that the infrared light sensed by the photosensitive infrared detection circuit 30 can also be the infrared signal emitted by devices such as remote controls. However, the photosensitive infrared detection circuit 30 does not perform signal processing; it only generates a wake-up signal in response to light. Therefore, the structure of the photosensitive infrared detection circuit 30 is simpler than that of the infrared receiver 10, resulting in lower power consumption. Using the photosensitive infrared detection circuit 30 instead of the infrared receiver 10 for wake-up reduces the power consumption of the infrared signal receiving device in standby mode to below 3mW.

[0050] In some embodiments, the photosensitive infrared detection circuit 30 may include a photosensitive infrared switch circuit and an amplification circuit. The photosensitive infrared switch circuit is configured to output a sensing signal when infrared light is detected. The amplification circuit is connected to the photosensitive infrared switch circuit and the control unit 40 respectively, and is configured to amplify the sensing signal to provide a wake-up signal.

[0051] The photosensitive infrared switch circuit can use a photosensitive infrared device to generate a sensing signal in response to light. This sensing signal can be a current signal or a voltage signal. The amplifier circuit amplifies the sensing signal, such as current amplification or voltage amplification, thereby improving the response sensitivity of the photosensitive infrared detection circuit 30 to infrared light.

[0052] As an example, a photosensitive infrared switch circuit may include a photosensitive infrared switch transistor having a first electrode and a second electrode, the first electrode being connected to a first reference voltage node, and the second electrode of the photosensitive infrared switch transistor being used to provide a sensing signal.

[0053] The photosensitive infrared switch turns on when it senses infrared light, and current flows out from the first reference voltage node through the photosensitive infrared switch. The degree of conduction of the photosensitive infrared switch is affected by the intensity of the infrared light; the greater the degree of conduction, the greater the current; the smaller the degree of conduction, the smaller the current. For example, the stronger the infrared light, the greater the current of the sensed signal; the weaker the infrared light, the smaller the current of the sensed signal.

[0054] In some embodiments, the amplifier circuit includes a transistor, the collector of which is connected to a second reference voltage node, the base of which is connected to the second terminal of a photosensitive infrared switch, and the emitter of which is used to provide a wake-up signal.

[0055] The first and second reference voltage nodes can be the same voltage node. The sensing signal is transmitted to the base of the transistor, and the emitter of the transistor outputs the amplified wake-up signal. The amplification factor of the transistor can be set according to requirements.

[0056] In some embodiments, the amplifier circuit includes multiple stages of transistors, with the collector of each transistor connected to a third reference voltage node, the base of each transistor connected to the emitter of the previous stage transistor, the base of the first stage transistor connected to the second terminal of a photosensitive infrared switch, and the emitter of the last stage transistor used to provide a wake-up signal.

[0057] The emitter of the pre-stage transistor is connected to the base of the subsequent stage transistor. The amplified current output from the emitter of the pre-stage transistor is then amplified again by the subsequent stage transistor. The higher the amplification factor of a single-stage transistor, the stronger the interference it introduces. Therefore, using multi-stage transistors for amplification can achieve a higher amplification factor and less interference.

[0058] Reference Figure 3 , Figure 3A topology of a photosensitive infrared detection circuit 30 is shown. As an example, the photosensitive infrared switch is a photosensitive infrared diode D1. The photosensitive infrared detection circuit 30 also includes a first transistor Q1, a second transistor Q2, and a first resistor R1. The cathode of the photosensitive infrared diode D1, the collector of the first transistor Q1, and the collector of the second transistor Q2 are all connected to the voltage node VCC. The anode of the photosensitive infrared diode D1 is connected to the base of the first transistor Q1, the emitter of the first transistor Q1 is connected to the base of the second transistor Q2, the emitter of the second transistor Q2 is connected to the first terminal of the first resistor R1, and the second terminal of the first resistor R1 is connected to the ground node.

[0059] The emitter of the second transistor Q2 is used to output the wake-up signal. When the photosensitive infrared diode D1 senses infrared light, it conducts, and current flows through the base of the first transistor Q1, forming a circuit. The current then flows through the base of the second transistor Q2, turning it on. Finally, the current passes through the first resistor R1, generating a voltage drop that forms the wake-up signal VOUT. The wake-up signal VOUT can be connected to the MCU's external interrupt pin, allowing the MCU to be woken up via an external interrupt.

[0060] In this example, the first transistor Q1 and the second transistor Q2 form a two-stage amplification, resulting in a greater amplification factor and less interference, and also improving the sensitivity of the photosensitive infrared detection circuit 30.

[0061] Reference Figure 4 , Figure 4 A topology of a photosensitive infrared detection circuit 30 is shown. As an example, the photosensitive infrared switch is a photosensitive infrared transistor J1, and the photosensitive infrared detection circuit 30 also includes a third transistor Q3 and a second resistor R2. The collectors of both the photosensitive infrared transistor J1 and the third transistor Q3 are connected to the voltage node VCC. The emitter of the photosensitive infrared transistor J1 is connected to the base of the third transistor Q3. The emitter of the third transistor Q3 is connected to the first terminal of the second resistor R2, and the second terminal of the second resistor R2 is connected to the ground node.

[0062] The emitter of the third transistor Q3 is used to output a wake-up signal. When the photosensitive infrared transistor J1 senses infrared light, it turns on, and current flows through the base of the third transistor Q3, turning on Q3. The current flows through the second resistor R2, generating a voltage drop that forms the wake-up signal VOUT. The wake-up signal VOUT can be connected to the MCU's external interrupt pin, allowing the MCU to be woken up via an external interrupt.

[0063] Reference Figure 5 , Figure 5 A topology of a photosensitive infrared detection circuit 30 is shown. As an example, Figure 5 exist Figure 4The circuit structure shown adds an additional amplification stage. The photosensitive infrared detection circuit 30 also includes a fourth transistor Q4. The collector of the fourth transistor Q4 is connected to the voltage node VCC. The emitter of the third transistor Q3 is connected to the base of the fourth transistor Q4. The emitter of the fourth transistor Q4 is connected to the first terminal of the second resistor R2, and the second terminal of the second resistor R2 is connected to the ground node. The third transistor Q3 and the fourth transistor Q4 form a two-stage amplification, achieving a greater amplification factor and less interference, and also improving the sensitivity of the photosensitive infrared detection circuit 30.

[0064] Reference Figure 6 , Figure 6 The structure of a display panel is shown. One embodiment of this application also provides a display panel including a communication circuit 50 and an LED scanning circuit 60. Both the communication circuit 50 and the LED scanning circuit 60 are connected to a control unit 40. When the infrared signal receiving device is in standby mode, both the communication circuit 50 and the LED scanning circuit 60 are in sleep mode.

[0065] The communication circuit 50 is used to connect the display board to an external device to obtain display data sent by the external device. As an example, the display board is located in an air conditioner, and the communication circuit 50 can connect to the air conditioner's main control board via protocols such as UART, SPI, or I2C to achieve real-time communication between the air conditioner's display board and the main control board. For example, it can transmit user-set temperature, fan speed, and mode (cooling / heating) to the main control board.

[0066] The LED scanning circuit 60 is connected to the LED panel. It receives display data sent by the control unit 40, and outputs display signals to scan each LED unit in the LED panel to display corresponding information by parsing the display data. For example, it can display temperature, fan speed, mode (cooling / heating), etc.

[0067] A switch can also be installed on the power supply circuits of the communication circuit 50 and the LED scanning circuit 60, and this switch is connected to the control unit 40. When the display panel enters standby mode, the infrared signal receiver also enters standby mode, and at the same time, the control unit 40 controls the switch to open, shutting down the communication circuit 50 and the LED scanning circuit 60, thereby reducing the standby power consumption of the display panel.

[0068] One embodiment of this application also provides an air conditioner, which includes the display panel as described above. The structure and principle of the display panel can be referred to the foregoing embodiments, and it also has the corresponding technical effects, which will not be repeated here. Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An infrared signal receiving apparatus characterized by comprising: include: Infrared receiver; A switching circuit is provided in the power supply circuit of the infrared receiver; The photosensitive infrared detection circuit is configured to output a wake-up signal when infrared light is detected. The control unit is connected to the switching circuit and the photosensitive infrared detection circuit respectively, and is configured to receive the wake-up signal and send a power supply signal to the switching circuit; When the infrared signal receiving device is in standby mode, the switching circuit is in the off state.

2. The infrared signal receiving apparatus according to claim 1, characterized by The photosensitive infrared detection circuit includes: A photosensitive infrared switch circuit is configured to output a sensing signal when infrared light is detected. An amplification circuit is connected to both the photosensitive infrared switch circuit and the control unit, and is configured to amplify the sensing signal to provide the wake-up signal.

3. The infrared signal receiving apparatus according to claim 2, wherein The photosensitive infrared switch circuit includes: A photosensitive infrared switch has a first electrode and a second electrode. The first electrode is connected to a first reference voltage node, and the second electrode of the photosensitive infrared switch is used to provide the sensing signal.

4. The infrared signal receiving apparatus according to claim 3, wherein The amplifier circuit includes a transistor, the collector of which is connected to a second reference voltage node, the base of which is connected to the second terminal of the photosensitive infrared switch, and the emitter of which is used to provide the wake-up signal.

5. The infrared signal receiving apparatus according to claim 3, wherein The amplifier circuit includes multiple stages of transistors. The collector of each transistor is connected to a third reference voltage node, the base of each transistor is connected to the emitter of the transistor in the previous stage, the base of the first stage transistor is connected to the second terminal of the photosensitive infrared switch, and the emitter of the last stage transistor is used to provide the wake-up signal.

6. The infrared signal receiving apparatus according to claim 3, wherein The photosensitive infrared switch is a photosensitive infrared diode or a photosensitive infrared triode.

7. The infrared signal receiving apparatus according to any one of claims 1 to 6, characterized by The switching circuit includes a switching transistor, the first end of which is connected to a power supply node, the second end of which is connected to a power supply node of the infrared receiver, and the control terminal of which is connected to the control unit.

8. The infrared signal receiving apparatus according to any one of claims 1 to 6, characterized by The control unit includes an MCU, which has a built-in reset circuit.

9. A display panel, characterized by The display panel includes a communication circuit, an LED scanning circuit, and an infrared signal receiving device according to any one of claims 1-8, wherein the infrared signal receiving device is connected to the communication circuit and the LED scanning circuit respectively. When the infrared signal receiving device is in standby mode, both the communication circuit and the LED scanning circuit are in sleep mode.

10. An air conditioner characterized by comprising: The air conditioner includes the display panel according to claim 9.

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