Low-power-consumption optical receiving device

Abstract

The invention discloses an optical receiving device with low power consumption, which comprises an infrared receiving part used for receiving an infrared signal and a standby power saving part electrically connected with the infrared receiving part, so that the infrared receiving part performs closing control in a standby mode, and the power consumption is reduced. In a standby power saving unit, a reference clock signal generator generates a reference clock signal from a received infrared signal; the closing control module generates a closing control signal according to the reference clock signal; the EN / DIS operation module enables the infrared receiver to be in a starting or closing state according to the closing control signal; the output signal detection module detects the existence of the operation control signal, so that the state of the infrared receiver is kept in a starting state. Thus, by sensing whether to receive the infrared signal from the remote controller and generating the off control signal, the operation of the infrared receiving unit receiving the infrared signal is controlled, thereby reducing the consumed standby power, and smoothly switching from the standby state to the operating state during operation.

Description

Technical Field

[0001] The invention belongs to the field of optical receiving devices, and in particular relates to a low-power optical receiving device. Background Art

[0002] Due to the impact of high oil prices, global warming, and resource depletion, the development of energy-saving technologies for electronic devices is being actively carried out. In particular, for home appliances used in homes or companies, it is particularly necessary to reduce power consumption or standby power. Among them, standby power is the power consumed when the electronic device is connected to an external power source and does not perform the main function of the device or waits for internal or external start signals.

[0003] At present, in order to reduce the consumption of standby power, the existing technology has an automatic power saving system and a standby power cutting device for cutting off the standby power at a long distance. Each electrical product is installed between the plug and the socket, and senses whether the related electrical product is using electricity. If it is not in use at this time, it occupies the standby power. The occupied power is converted into an internal switch, and an adapter that cuts off the standby power is started.

[0004] However, in the case of the above-mentioned prior art, from the standpoint of consumers, a separate product must be purchased, and there are many inconveniences in use, so it has not been widely popularized. And because the photocurrent signal received by the infrared receiving device such as home appliances using a remote control through a photodiode is very weak, the gain value for amplifying the signal is quite large (e.g., 170 dB to 180 dB). In addition, in order to suppress the noise signal caused by interference light (e.g., incandescent lamp, fluorescent lamp, three-wavelength, LED lamp, TV backlight, etc.), the operation of the automatic gain control unit (AGC Control) also increases the power consumption.

[0005] In order to reduce standby power, the prior art can also reduce the power consumption by an external forced shutdown method. However, in this case, the user must release the shutdown state externally and start the system with a remote controller for normal operation.

[0006] Therefore, for the infrared receiving device of the remote controller of conventional household appliances, it is necessary to provide a low-power optical receiving device that can minimize power consumption when in standby mode and can smoothly switch from standby mode to operating mode during operation. Summary of the invention

[0007] The object of the present invention is to provide a low-power optical receiving device, which can minimize power consumption when in a standby state and can smoothly switch from the standby state to the operating state during operation. The technical solution is as follows:

[0008] A low-power optical receiving device, the low-power optical receiving device comprising:

[0009] An infrared receiving unit, used for receiving infrared signals, processing the infrared signals and outputting operation control signals;

[0010] a standby power saving unit, electrically connected to the infrared receiving unit, for generating a shutdown control signal to shut down the infrared receiving unit when the infrared receiving unit is in a standby mode, so as to reduce power consumption;

[0011] Wherein, the standby power saving unit includes a reference clock signal generator, a shutdown control module, an EN / DIS operation module and an output signal detection module which are electrically connected to each other;

[0012] The reference clock signal generator is used to generate a reference clock signal according to the received infrared signal;

[0013] The shutdown control module is used to generate a shutdown control signal for periodically shutting down the infrared receiving unit in the standby mode according to the reference clock signal; wherein the shutdown control signal includes a shutdown period and a start period, and the shutdown period is longer than the start period;

[0014] The EN / DIS operation module is used to enable or disable the infrared receiver according to the shutdown control signal received from the shutdown control module;

[0015] The output signal detection module is used to detect the operation control signal output by the infrared receiving unit; when the operation control signal is detected, the shutdown control module controls the EN / DIS operation module to keep the state of the infrared receiver in the activated state.

[0016] As a further illustration of the present invention, preferably, the infrared receiving unit comprises an infrared signal receiving module, an ultra-short amplification module, an automatic gain adjustment amplification module, a limiting amplifier module, a bandpass filter module, an automatic gain control module and a demodulation and Schmidt output module which are electrically connected to each other;

[0017] Among them, the infrared signal receiving module is used to receive infrared signals and convert the infrared signals into current signals; the ultra-short amplification module is used to receive the converted current signals and amplify the current signals into voltage signals; the automatic gain adjustment amplification module is used to amplify the voltage signals according to the set gain value; the limiting amplifier module is used to limit the amplified voltage signals to a preset size to prevent the voltage signals from being distorted;

[0018] The bandpass filter module is used to receive the voltage signal output by the limiting amplifier module and allow the bandpass signal of a specific frequency band to pass through; the bandpass signal passing through the bandpass filter module is input into the automatic gain adjustment module; the bandpass signal passing through the bandpass filter module is also input into the demodulation and Schmidt output module, which is used to remove the carrier signal and shape the signal, and output the operation control signal.

[0019] As a further illustration of the present invention, preferably, the automatic gain adjustment module is used to adjust the gain value of the automatic gain adjustment amplification module according to the type of the bandpass signal.

[0020] As a further illustration of the present invention, preferably, the output signal detection module is used to detect the operation control signal output by the demodulation and Schmidt output module.

[0021] The low-power optical receiving device provided by the present invention comprises an infrared receiving unit and a standby power saving unit electrically connected to each other; the infrared receiving unit is used to receive infrared signals and output an operation control signal after processing the infrared signals; the standby power saving unit is used to generate a shutdown control signal to shut down the infrared receiving unit when the infrared receiving unit is in standby mode, so as to reduce power consumption; wherein the standby power saving unit comprises a reference clock signal generator, a shutdown control module, an EN / DIS operation module and an output signal detection module electrically connected to each other; the reference clock signal generator is used to generate a reference clock signal according to the received infrared signal; the shutdown control module The module is used to generate a shutdown control signal that periodically performs shutdown control on the infrared receiving unit in the standby mode according to the reference clock signal; wherein the cycle of the shutdown control signal includes a shutdown cycle and a startup cycle, and the amplitude of the shutdown cycle is greater than the startup cycle; the EN / DIS operation module is used to make the state of the infrared receiver in the startup or shutdown state according to the shutdown control signal received from the shutdown control module; the output signal detection module is used to detect the operation control signal output by the infrared receiving unit; when the operation control signal is detected, the shutdown control module controls the EN / DIS operation module to keep the state of the infrared receiver in the startup state. In this way, the present invention can reduce the standby power consumption by sensing whether the infrared signal is received from the remote control and generating a shutdown control signal to control the action of the infrared receiving unit that receives the infrared signal, so that the power consumption of the infrared receiving unit is minimized when it is in the standby state, and it can also smoothly switch from the standby state to the operating state during the operation of the low-power optical receiving device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is one of the structural schematic diagrams of a low-power optical receiving device according to an embodiment of the present invention;

[0024] Figure 2 This is one of the structural schematic diagrams of the standby power saving unit of an embodiment of the present invention;

[0025] Figure 3 This is one of the waveform diagrams of the closing control signal according to an embodiment of the present invention;

[0026] Figure 4 FIG2 is a second waveform diagram of a closing control signal according to an embodiment of the present invention;

[0027] Figure 5 This is one of the structural schematic diagrams of the infrared receiving unit of an embodiment of the present invention;

[0028] Figure 6 This is the second structural schematic diagram of the low-power optical receiving device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work, using similar structures and similar changes of the present invention, should be included in the protection scope of the present invention.

[0030] See also Figures 1 to 4 , Figure 1 This is one of the structural schematic diagrams of a low-power optical receiving device according to an embodiment of the present invention; Figure 2 This is one of the structural schematic diagrams of the standby power saving unit of an embodiment of the present invention; Figure 3 This is one of the waveform diagrams of the closing control signal according to an embodiment of the present invention; Figure 4 FIG. 2 is a second waveform diagram of a closing control signal according to an embodiment of the present invention.

[0031] like Figure 1 As shown, the low power consumption optical receiving device 100 includes an infrared receiving unit 10 and a standby power saving unit 20 which are electrically connected to each other.

[0032] The infrared receiving unit 10 is used to receive infrared signals, process the infrared signals and output operation control signals.

[0033] The standby power saving unit 20 is electrically connected to the infrared receiving unit 10 and is used to generate a shutdown control signal to shut down the infrared receiving unit 10 when the infrared receiving unit 10 is in the standby mode, so as to reduce power consumption.

[0034] The present invention is a low-power optical receiving device suitable for a remote controller of a conventional household appliance. Since the infrared receiving unit 10 can communicate with the remote controller by infrared, which is a known technical means, this embodiment will not be repeated here. The present invention can sense whether an infrared signal is received from a remote controller (not shown in the figure) and generate a shutdown control signal to control the action of the infrared receiving unit 20 that receives the infrared signal, thereby reducing the consumed standby power. In this way, when the low-power optical receiving device 100 is in a standby state, the power consumption is minimized, and the low-power optical receiving device 100 can also smoothly switch from the standby state to the operating state during operation.

[0035] like Figure 2 As shown, the standby power saving unit 20 includes a reference clock signal generator 210, a shutdown control module 220, an EN / DIS operation module 230 and an output signal detection module 240 which are electrically connected to each other.

[0036] The reference clock signal generator 210 is used to generate a reference clock signal according to the received infrared signal. Specifically, the reference clock signal generator 210 can generate a reference clock signal according to a signal from a remote controller to set the period and amplitude of the shutdown control signal.

[0037] The shutdown control module 220 is used to generate a shutdown control signal for periodically shutting down the infrared receiving unit 10 in the standby mode according to the reference clock signal. The shutdown control signal includes a shutdown period and a start period, and the shutdown period is longer than the start period. Figure 3 As shown, the period of the shutdown control signal can be set according to the reference clock signal, so that the shutdown period of the infrared receiving unit 10 is longer than the startup period. It should be noted that, Figure 3 The a in the figure indicates the shutdown cycle, and the b indicates the startup cycle.

[0038] The start-up cycle is to make the infrared receiving unit 10 work normally again when the infrared receiving unit 10 is in the standby mode, that is, to be in the start-up state for a certain period of time (such as Figure 3b shown is a start-up cycle), therefore, the shutdown control signal generated in the shutdown control module 220 can make the infrared receiving unit 10 in a normal working state during the shutdown control signal start-up cycle.

[0039] Generally speaking, there is no international standard for the signal output from the remote control, and the signal form is very diverse. Usually, when it is an NEC code or a Toshiba code, its period is about 100msec. That is to say, one frame period of the signal is about 100 milliseconds (msec), of which the actual remote signal is about 50%. Therefore, the present invention can set the period of the shutdown control signal to about 50 milliseconds, and can arbitrarily set the actual activation time according to actual needs, such as 1 / 5, 1 / 10 and 1 / 20. For example, when the activation time is set to 1 / 10, since the period of the shutdown control signal is 50msec, only during the actual 10% of the 5msec period, the infrared receiving unit 10 can be activated and in an enabled state, and the rest of the time can be turned off. This means that in standby mode, the current consumption value can be reduced by about 1 / 10 by turning off the control signal.

[0040] Specifically, the EN / DIS operation module 230 is used to enable the infrared receiver 10 to be in an on or off state according to the off control signal received from the off control module 220 .

[0041] In this way, the standby power saving unit 20 of the present invention can sense whether an infrared signal is received from a remote control (not shown in the figure) through the reference clock signal generator 210, the shutdown control module 220 and the EN / DIS operation module 230, and generate a shutdown control signal to control the action of the infrared receiving unit 20 that receives the infrared signal, thereby reducing the standby power consumption.

[0042] Of course, even if the infrared receiving part 10 is in standby mode and the power is reduced by about 1 / 10 by shutting down, when the remote control is working normally (for example, when the power button is pressed), in order to make the infrared receiving part 10 work normally, the output signal detection module 240 can detect the operation control signal output by the infrared receiving part 10. When the operation control signal is detected, the shutdown control module 220 can control the EN / DIS operation module 230 to keep the state of the infrared receiver 10 in the started state. That is to say, during the shutdown cycle, only 1 / 10 of the infrared receiving part 10 is in the enabled state. Therefore, if an operation control signal appears during this period, the shutdown control module 220 can control the EN / DIS operation module 230, so that it can be turned on as shown in the figure. Figure 4 As shown, b is a startup cycle, which controls the state of the infrared receiver 10 to maintain the startup state.

[0043] In this way, while the low power consumption optical receiving device 100 of the present invention can minimize power consumption when in the standby state, the low power consumption optical receiving device 100 can also smoothly switch from the standby state to the operating state during operation.

[0044] It is understandable that if the output signal detection module 240 no longer detects the operation control signal output by the infrared receiving unit 10 within a certain period of time, the shutdown control module 220 will generate the original periodic shutdown control signal again, thereby reducing standby power consumption.

[0045] The low-power optical receiving device provided by the present invention comprises an infrared receiving unit and a standby power saving unit electrically connected to each other; the infrared receiving unit is used to receive infrared signals and output an operation control signal after processing the infrared signals; the standby power saving unit is used to generate a shutdown control signal to shut down the infrared receiving unit when the infrared receiving unit is in standby mode, so as to reduce power consumption; wherein the standby power saving unit comprises a reference clock signal generator, a shutdown control module, an EN / DIS operation module and an output signal detection module electrically connected to each other; the reference clock signal generator is used to generate a reference clock signal according to the received infrared signal; the shutdown control module The module is used to generate a shutdown control signal that periodically performs shutdown control on the infrared receiving unit in the standby mode according to the reference clock signal; wherein the cycle of the shutdown control signal includes a shutdown cycle and a startup cycle, and the amplitude of the shutdown cycle is greater than the startup cycle; the EN / DIS operation module is used to make the state of the infrared receiver in the startup or shutdown state according to the shutdown control signal received from the shutdown control module; the output signal detection module is used to detect the operation control signal output by the infrared receiving unit; when the operation control signal is detected, the shutdown control module controls the EN / DIS operation module to keep the state of the infrared receiver in the startup state. In this way, the present invention can reduce the standby power consumption by sensing whether the infrared signal is received from the remote control and generating a shutdown control signal to control the action of the infrared receiving unit that receives the infrared signal, so that the power consumption of the infrared receiving unit is minimized when it is in the standby state, and it can also smoothly switch from the standby state to the operating state during the operation of the low-power optical receiving device.

[0046] In addition, the infrared receiving unit 10 can be installed on electronic devices such as conventional household appliances to receive infrared signals generated from a remote controller, and output an operation control signal when receiving the infrared signal containing an operation command.

[0047] Please combine Figure 5 and Figure 6 , Figure 5 This is one of the structural schematic diagrams of the infrared receiving unit of an embodiment of the present invention; Figure 6 This is the second structural schematic diagram of the low-power optical receiving device according to an embodiment of the present invention.

[0048] like Figures 5 to 6 As shown, the infrared receiving unit includes an infrared signal receiving module 110, an ultra-short amplification module 120, an automatic gain adjustment amplification module 130, a limiting amplifier module 140, a bandpass filter module 150, an automatic gain control module 160 and a demodulation and Schmidt output module 170 which are electrically connected to each other.

[0049] The infrared signal receiving module 110 is used to receive an infrared signal including an operation command sent from a remote controller, and convert the infrared signal into a fine current signal.

[0050] The ultra-short amplification module 120 is used to receive the converted current signal and amplify the current signal into a voltage signal.

[0051] The automatic gain adjustment amplification module 130 is used to amplify the voltage signal according to a set gain value.

[0052] The limiting amplifier module 140 is used to limit the amplified voltage signal to a preset value, that is, it cannot exceed a set gain value, so as to prevent the voltage signal from being distorted.

[0053] The bandpass filter module 150 is used to receive the voltage signal output by the limiting amplifier module 140 and allow the bandpass signal of a specific frequency band to pass through. Specifically, in the bandpass filter module 150 that receives the voltage signal output by the limiting amplifier module 140, filtering can be performed with a set frequency band. This is to improve the communication sensitivity of the infrared signal generated by the remote control and increase the receiving distance, using specific carrier signals with frequencies of 32kHz, 36kHz, 38kHz, 40kHz and 56kHz. Therefore, the bandpass filter module 150 can be set to only allow the bandpass signal of a specific frequency band to pass through.

[0054] On the one hand, the bandpass signal passing through the bandpass filtering module 150 is input to the automatic gain adjustment module 160. The automatic gain adjustment module 160 is used to adjust the gain value of the automatic gain adjustment amplification module 130 according to the category of the bandpass signal. Specifically, in order to adjust the gain value of the automatic gain adjustment amplification module 130, it is possible to distinguish whether it is a normal signal generated from a remote controller or a noise signal caused by interference light through the existing technology, and when it is a noise signal, the gain value of the automatic gain adjustment amplification module 130 can be reduced.

[0055] On the other hand, the bandpass signal after filtering, i.e., passing through the bandpass filtering module 150, is also input into the demodulation and Schmidt output module 170, and is output as an operation control signal by removing the carrier signal and shaping the signal. The operation control signal is used to operate and control a microcomputer or other control IC (not shown) connected to the low-power optical receiving device 100.

[0056] In addition, in some optional embodiments, the output signal detection module 240 is specifically used to detect the operation control signal output by the demodulation and Schmidt output module 170.

[0057] It is understandable that the cycle of the shutdown control signal controlled by the shutdown control module 220 and the duration contained in one cycle of the shutdown control signal can also be arbitrarily set by the user's signal form, such as by time period, usage mode, etc., and this embodiment does not limit this.

[0058] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0059] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations 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 one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A low-power optical receiving device, characterized in that: The low-power optical receiving device comprises: An infrared receiving unit (10) is used to receive infrared signals and process the infrared signals to output operation control signals; A standby power saving unit (20) is electrically connected to the infrared receiving unit (10) and is used to generate a shutdown control signal to shut down the infrared receiving unit (10) when the infrared receiving unit (10) is in a standby mode, so as to reduce power consumption; The standby power saving unit (20) comprises a reference clock signal generator (210), a shutdown control module (220), an EN / DIS operation module (230) and an output signal detection module (240) which are electrically connected to each other; The reference clock signal generator (210) is used to generate a reference clock signal according to the received infrared signal; The shutdown control module (220) is used to generate a shutdown control signal for periodically performing shutdown control on the infrared receiving unit (10) in a standby mode according to the reference clock signal; wherein the shutdown control signal includes a shutdown period and a startup period, and the shutdown period is longer than the startup period; The EN / DIS operation module (230) is used to enable the infrared receiver (10) to be in an activated state or a deactivated state according to a deactivation control signal received from the deactivation control module (220); The output signal detection module (240) is used to detect the operation control signal output by the infrared receiving unit (10); when the operation control signal is detected, the shutdown control module (220) controls the EN / DIS operation module (230) to keep the state of the infrared receiver (10) in an activated state.

2. The low-power optical receiving device according to claim 1, characterized in that: The infrared receiving unit (10) comprises an infrared signal receiving module (110), an ultra-short amplification module (120), an automatic gain adjustment amplification module (130), a limiting amplifier module (140), a bandpass filter module (150), an automatic gain control module (160), and a demodulation and Schmidt output module (170) which are electrically connected to each other; The infrared signal receiving module (110) is used to receive infrared signals and convert the infrared signals into current signals; the ultra-short amplification module (120) is used to receive the converted current signals and amplify the current signals into voltage signals; the automatic gain adjustment amplification module (130) is used to amplify the voltage signals according to a set gain value; and the limiting amplifier module (140) is used to limit the amplified voltage signals to a preset value to prevent the voltage signals from being distorted; The bandpass filter module (150) is used to receive the voltage signal output by the limiting amplifier module (140) and allow a bandpass signal of a specific frequency band to pass through; the bandpass signal passing through the bandpass filter module (150) is input into the automatic gain adjustment module (160); the bandpass signal passing through the bandpass filter module (150) is also input into the demodulation and Schmidt output module (170) for removing carrier signals and shaping the signals, and outputting operation control signals.

3. The low-power optical receiving device according to claim 2, characterized in that: The automatic gain adjustment module (160) is used to adjust the gain value of the automatic gain adjustment amplification module (130) according to the type of the bandpass signal.

4. The low-power optical receiving device according to claim 1, characterized in that: The output signal detection module (240) is used to detect the operation control signal output by the demodulation and Schmidt output module (170).

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