CN216697783U - Backlight adjusting circuit and remote controller - Google Patents
Backlight adjusting circuit and remote controller Download PDFInfo
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- CN216697783U CN216697783U CN202123040124.7U CN202123040124U CN216697783U CN 216697783 U CN216697783 U CN 216697783U CN 202123040124 U CN202123040124 U CN 202123040124U CN 216697783 U CN216697783 U CN 216697783U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The application discloses a backlight adjusting circuit and a remote controller, wherein the backlight adjusting circuit comprises a light induction module, a main control module and a backlight driving module, and the backlight driving module is provided with a backlight source; the light sensing module is used for generating a voltage signal according to the real-time sensed ambient light signal and sending the voltage signal to the main control module; the main control module is used for obtaining a corresponding control signal according to the voltage signal and sending the control signal to the backlight driving module; the backlight driving module is used for adjusting the backlight brightness of the backlight source according to the control signal. The backlight brightness of the backlight source can be adjusted according to the ambient light signal, the problem that power consumption is serious due to the fact that the backlight brightness is fixed in the prior art is solved, electric quantity and energy are saved, and the service life of the power supply is prolonged.
Description
Technical Field
The application relates to the technical field of electronics, in particular to a backlight adjusting circuit and a remote controller.
Background
With the improvement of the life quality of people, the remote controller matched with the electrical equipment becomes an indispensable article in daily life.
In order to enable a user to see clearly the information displayed on the display screen of the remote control in the dark at night, remote controls with backlighting are available on the market.
However, most of the backlight brightness of the existing remote controllers with backlight is fixed, and the fixed backlight brightness not only easily causes discomfort to eyes of users, but also has serious power consumption.
SUMMERY OF THE UTILITY MODEL
The application provides a backlight adjusting circuit and a remote controller, and aims to solve the problem that power consumption of the remote controller is serious due to the fact that backlight brightness of the remote controller is fixed in the prior art.
In a first aspect, the present application provides a backlight adjusting circuit, which includes a light sensing module, a main control module and a backlight driving module, wherein the main control module is electrically connected to the light sensing module and the backlight driving module, and the backlight driving module is configured with a backlight source;
the light sensing module is used for generating a voltage signal according to the real-time sensed ambient light signal and sending the voltage signal to the main control module;
the main control module is used for obtaining a corresponding control signal according to the voltage signal and sending the control signal to the backlight driving module;
and the backlight driving module is used for adjusting the backlight brightness of the backlight source according to the control signal.
In a possible implementation manner of the present application, the control signal is configured with a duty ratio parameter, and the backlight driving module is configured to adjust the on-time of the backlight source according to the duty ratio parameter of the control signal, so as to adjust the backlight brightness of the backlight source.
In one possible implementation manner of the present application, the control signal includes a high level signal and a low level signal, and the duty cycle parameter is used to represent a duration of the high level signal in one period;
when the control signal is a high level signal, the backlight source is conducted to emit light; when the control signal is a low level signal, the backlight source is cut off and does not emit light.
In one possible implementation manner of the present application, the backlight source is a light emitting diode, the backlight driving module includes a first triode and a second triode, the main control module is connected to a base of the first triode, an emitter of the first triode is connected to a base of the second triode, an emitter of the second diode is grounded, a collector of the second triode is connected to a cathode of the light emitting diode, and an anode of the light emitting diode is connected to a power supply.
In one possible implementation manner of the application, the light sensing module includes a light sensing unit and a voltage dividing unit, the light sensing unit is electrically connected with the voltage dividing unit, and a joint of the light sensing unit and the voltage dividing unit is electrically connected with the main control module;
the photosensitive unit is used for sensing an ambient light signal in real time and converting the ambient light signal into a corresponding current signal;
and the voltage division unit is used for generating a voltage signal according to the current signal and sending the voltage signal to the main control module.
In this application a possible implementation, the sensitization unit is photosensitive sensor, and the partial pressure unit is first resistance, and photosensitive sensor's first end is connected with the power, and photosensitive sensor's second end is connected with the first end and the host system of first resistance respectively, and the second end ground connection of first resistance.
In one possible implementation manner of the present application, the light sensing module further includes a current limiting unit, and a connection portion between the light sensing unit and the voltage dividing unit is electrically connected to the main control module through the current limiting unit;
and the current limiting unit is used for limiting the current of the current signal flowing into the main control module.
In a possible implementation manner of the present application, the current limiting unit is a second resistor, a first end of the second resistor is connected to the main control module, and a second end of the second resistor is connected to a junction between the photosensitive unit and the voltage dividing unit.
In a second aspect, the present application further provides a remote controller including the backlight adjusting circuit of the first aspect.
In one possible implementation manner of the application, a brightness adjusting key is arranged on the remote controller, the brightness adjusting key is electrically connected with the main control module, and the brightness adjusting key is used for adjusting the duty ratio parameter of the control signal.
From the above, the present application has the following advantageous effects:
in the application, the ambient light signal is sensed through the light sensing module and the voltage signal is generated, then the main control module obtains the control signal corresponding to the voltage signal according to the voltage signal, so that the backlight driving module adjusts the backlight brightness of the backlight source according to the control signal, the backlight brightness of the backlight source can be adjusted according to the ambient light signal, the problem that power consumption is serious due to the fact that the backlight brightness is fixed in the prior art is solved, electric quantity and energy are saved, and the service life of the power supply is prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the present application, the drawings that are needed to be used in the description of the present application will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a backlight adjusting circuit provided in an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a backlight driving module provided in an embodiment of the present application;
fig. 3 is a schematic circuit diagram of a light sensing module provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a master control module provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a remote controller provided in the embodiment of the present application.
Detailed Description
The technical solutions in the present application will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The backlight adjusting circuit and the remote controller provided by the present application will be described in detail below.
First, referring to fig. 1, fig. 1 is a schematic structural diagram of a backlight adjusting circuit provided in an embodiment of the present application. The backlight adjusting circuit may include a light sensing module 100, a main control module 200 and a backlight driving module 300, wherein the main control module 200 is electrically connected to the light sensing module 100 and the backlight driving module 300, respectively, and the backlight driving module 300 is configured with a backlight source 301; the light sensing module 100 may be configured to generate a voltage signal according to a real-time sensed ambient light signal, and send the voltage signal to the main control module 200; the main control module 200 may be configured to obtain a corresponding control signal according to the voltage signal, and send the control signal to the backlight driving module 300; the backlight driving module 300 may be configured to adjust the backlight brightness of the backlight source 301 according to the control signal.
Backlight is a form of illumination in the electronics industry that differs from front light in that it is illuminated from the side or back, while front light is illuminated from the front as the name suggests. Backlights may be used to increase illumination and display brightness in low light environments.
It is understood that the backlight adjusting circuit is an application circuit capable of adjusting the backlight brightness, and can be applied to any display screen with a display function, such as a remote controller display screen, a computer display, a liquid crystal screen, and the like.
The backlight may be any one of Light source devices such as an incandescent bulb, an electro-optic panel, a Light-Emitting Diode (LED), a Cold Cathode Fluorescent Lamp (CCFL), and the like.
In this embodiment, the light sensing module 100 may be configured to generate a voltage signal according to the real-time sensed ambient light signal, and send the generated voltage signal to the main control module 200. It can be understood that, since the light sensing module 100 can generate the voltage signal according to the ambient light signal sensed in real time, the light sensing module 100 can receive the ambient light signal, where the ambient light signal can be a signal representing the ambient light brightness in the current environment, that is, the ambient light signal is a signal that can indicate the intensity of the ambient light brightness.
Since the ambient light signal when the ambient light brightness is relatively strong is different from the ambient light signal when the ambient light brightness is relatively weak, the voltage signal generated by the light sensing module 100 is also different for different ambient light signals, and correspondingly, the control signal obtained by the main control module 200 according to the voltage signal should also be different.
In order to enable the main control module 200 to output the control signal corresponding to the received voltage signal, in this embodiment of the application, a signal matching table may be configured for the main control module 200, and the signal matching table may record a corresponding relationship between the voltage signal and the control signal in advance, for example, the signal matching table may record a corresponding relationship between a voltage value of the voltage signal and a signal parameter of the control signal.
When the main control module 200 receives the voltage signal, it may search inside the signal matching table according to the voltage value of the voltage signal, find a signal parameter corresponding to the voltage value, generate a corresponding control signal according to the signal parameter, and output the control signal to the backlight driving module 300.
After receiving the control signal, the backlight driving module 300 may adjust the backlight brightness of the backlight source 301 according to the control signal.
In the embodiment of the present application, the light sensing module 100 senses an ambient light signal and generates a voltage signal, and then the main control module 200 obtains a control signal corresponding to the voltage signal according to the voltage signal, so that the backlight driving module 300 adjusts the backlight brightness of the backlight source 301 according to the control signal.
Referring to fig. 1, in some embodiments of the present disclosure, the photo sensing module 100 may include a photo sensing unit 101 and a voltage dividing unit 102, where the photo sensing unit 101 is electrically connected to the voltage dividing unit 102, and a connection portion between the photo sensing unit 101 and the voltage dividing unit 102 is electrically connected to the main control module 200; the light sensing unit 101 may be configured to sense an ambient light signal in real time and convert the ambient light signal into a corresponding current signal; the voltage dividing unit 102 may be configured to generate a voltage signal according to the current signal and send the voltage signal to the main control module 200.
It is understood that the light sensing unit 101 may be a sensing device having a response or conversion function to an ambient light signal, in this embodiment, the light sensing unit 101 may be any one of existing photosensitive sensors, including but not limited to a photo transistor, a photo resistor, a photodiode, a photo transistor, a photo coupler, and the like, and the specific details are not limited herein.
The light sensing unit 101 may be a device made by using a photoelectric effect of a semiconductor, in which a resistance value changes with intensity of incident light, and when an ambient light signal is strong, that is, when ambient light brightness is bright, the resistance value of the light sensing unit 101 decreases, and at this time, a current signal increases; in contrast, when the ambient light signal is weak, that is, the ambient light brightness is low, the resistance value of the light sensing unit 101 increases, and accordingly, the current signal decreases.
In the embodiment of the present application, the voltage dividing unit 102 may be an electronic device with a fixed resistance value, and is connected in series with the light sensing unit 101, when the ambient light signal is stronger and the resistance value of the light sensing unit 101 decreases, the current signal increases, and the voltage signals at two ends of the voltage dividing unit 102 connected in series with the light sensing unit 101 also increase; conversely, when the ambient light signal is weak and the resistance of the light sensing unit 101 increases, the current signal decreases, and the voltage signal across the voltage dividing unit 102 connected in series with the light sensing unit 101 also decreases.
As shown in fig. 3, fig. 3 is a schematic circuit diagram of a photo sensing module provided in an embodiment of the present application, in some embodiments of the present application, a photo sensing unit 101 is a photo sensor PSR1, a voltage dividing unit 102 is a first resistor R1, and a circuit structure of the photo sensing module 100 specifically includes:
a +5V power supply is connected to a first end, i.e., an anode, of the photosensitive sensor PSR1, a second end, i.e., a cathode, of the photosensitive sensor PSR1 is connected to a first end of a first resistor R1, a second end, i.e., a cathode, of the first resistor R1 is connected to ground, i.e., the photosensitive sensor PSR1 is connected in series to the first resistor R1, the second end of which is connected to ground, and the cathode of the photosensitive sensor PSR1 is further connected to any Input/Output (I/O) port of the main control module 200 through an Output terminal PSR, so as to transmit a voltage signal to the main control module 200 through the Output terminal PSR.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a main control module provided in the embodiment of the present application, the main control module 200 may be a main chip U1 with a model SH77P1651, and an output terminal PSR of the light sensing module 100 may be connected to any I/O port of the main chip U1, for example, the P0.6 port shown in fig. 4, i.e., the 37 th pin.
The photosensitive sensor PSR1 senses the change of the ambient light brightness in real time, the resistance value of the photosensitive sensor PSR1 changes along with the change of the ambient light brightness, when the ambient light brightness is bright, the resistance value of the photosensitive sensor PSR1 is reduced along with the change of the ambient light brightness, the current of the photosensitive sensor PSR1 is increased along with the decrease of the resistance value, and the partial pressure of the first resistor R1 is increased along with the increase of the current; when the ambient light becomes dark, the resistance of the photo sensor PSR1 increases, the current of the photo sensor PSR1 decreases, and the voltage division of the first resistor R1 decreases.
As shown in fig. 1, in some embodiments of the present application, the light sensing module 100 may further include a current limiting unit 103, and a connection between the light sensing unit 101 and the voltage dividing unit 102 is electrically connected to the main control module 200 through the current limiting unit 103; the current limiting unit 103 may be used to limit a current signal flowing into the main control module 200.
Specifically, as shown in fig. 3, the current limiting unit 103 is a second resistor R2, a first end of the second resistor R2 is connected to the main control module 200 through the output terminal PSR, a second end of the second resistor R2 is connected to a connection between the photosensitive sensor PSR1 and the first resistor R1, or it can be considered that a second end of the second resistor R2 is connected to a cathode of the photosensitive sensor PSR1, or a second end of the second resistor R2 is connected to a first end of the first resistor R1.
In the embodiment of the present application, in order to prevent the main chip U1 from being damaged due to an excessively large current signal transmitted to the main chip U1, the current signal may be limited by the second resistor R2 to protect the main chip U1.
In some embodiments of the present application, the control signal may be configured with a duty ratio parameter, and the backlight driving module 300 may be configured to adjust the on-time of the backlight 301 according to the duty ratio parameter of the control signal, so as to adjust the backlight brightness of the backlight 301.
After the main control module 200 receives the voltage signal, it outputs a control signal corresponding to the voltage signal to the backlight driving module 300, specifically, the main control module 200 may find a duty ratio parameter associated with the voltage signal according to the voltage signal, and then outputs a corresponding control signal based on the duty ratio parameter, so that the backlight driving module 300 may adjust the on-time of the backlight 301 according to the control signal of the duty ratio parameter.
It will be appreciated that the control signal may comprise a high level signal and a low level signal and the duty cycle parameter may be used to characterise the duration of the high level signal within a period, where a period may be considered to be the sum of the duration of a high level signal and the duration of a low level signal.
The backlight driving module 300 adjusts the on-time of the backlight 301, and may be that when the control signal is a high level signal, the backlight 301 is turned on to emit light; when the control signal is a low level signal, the backlight 301 is turned off and does not emit light.
Referring to fig. 2, fig. 2 is a schematic circuit diagram of a backlight driving module provided in an embodiment of the present application, in some embodiments of the present application, a backlight source 301 is a light emitting diode LED, the backlight driving module 300 may include a first transistor Q1 and a second transistor Q2, and a circuit structure of the backlight driving module 300 is:
the P0.5 port, i.e., the 38 th pin, of the main chip U1 shown in fig. 4 may be connected to the input port BLLED of the backlight driving module 300, the input port BLLED is connected to the first end of the third resistor R3, the second end of the third resistor R3 is connected to the base of the first transistor Q1, the collector of the first transistor Q1 is connected to the power VCC through the fourth resistor R4, the emitter of the first transistor Q1 is connected to the base of the second transistor Q2 through the sixth resistor R6, the emitter of the first transistor Q1 is further connected to the fifth resistor R5, which is grounded at the second end, the emitter of the second diode Q2 is grounded, the collector of the second transistor Q2 is connected to the cathode of the light emitting diode LED, and the anode of the light emitting diode LED is connected to the power VCC.
It can be understood that the power source VCC may be a power source of a remote controller or a display applied by the backlight adjusting circuit, and may provide a voltage of 5V or 3V, and it should be noted that a voltage value provided by the power source VCC may be set according to an actual application scenario, and is not limited herein.
In the embodiment of the application, when a high level signal is output from the P0.5 port of the main chip U1, the first triode Q1 is turned on, and the second triode Q2 is also turned on, at this time, the light emitting diode LED is turned on to emit light; on the contrary, when the P0.5 port of the main chip U1 outputs a low level signal, the first transistor Q1 is turned off, the second transistor Q2 is also turned off, and the light emitting diode LED is turned off and does not emit light.
When the duty ratio parameter of the control signal is larger, the proportion of the high level signal in one period is larger, namely the output time of the high level signal is longer, and at the moment, the longer the light emitting time of the Light Emitting Diode (LED) is, the brighter the backlight brightness is; in contrast, when the duty ratio parameter of the control signal is smaller, the proportion of the high level signal in one period is smaller, that is, the output time of the high level signal is shorter, and at this time, the shorter the light emitting time of the light emitting diode LED is, the lower the backlight brightness is.
Referring to fig. 2, the collector of the second transistor Q2 is further connected to a first end of a seventh resistor R7, and a second end of the seventh resistor R7 is connected to a cathode of the light emitting diode LED, it can be understood that the seventh resistor R7 can be used as a current limiting resistor to protect the light emitting diode LED, so as to prevent the light emitting diode LED from being damaged due to an excessive current flowing to the light emitting diode LED.
As shown in fig. 5, fig. 5 is a schematic structural diagram of a remote controller provided in the embodiment of the present application. On the basis of the foregoing embodiments, the present application further provides a remote controller 500, and the remote controller 500 may include the backlight adjusting circuit of any of the foregoing embodiments. The backlight brightness of the display area of the remote controller, such as a display screen, can be adjusted in real time according to the ambient light brightness through the backlight adjusting circuit.
In a specific implementation, the backlight adjusting circuit is applied to the remote controller, when the ambient light brightness is brighter, the voltage signal is larger, the duty ratio parameter of the control signal corresponding to the larger voltage signal is also larger, and the backlight brightness is brighter, so that a user can quickly find the remote controller according to the brighter backlight brightness of the display screen in the daytime.
When the ambient light brightness is darker, the smaller the voltage signal is, the smaller the duty ratio parameter of the control signal corresponding to the smaller voltage signal is, and the darker the backlight brightness is, so that a user can see the display screen clearly when the light is weaker, the display screen is not irradiated by strong light, discomfort is not caused to eyes, and the user experience is improved.
Referring to fig. 5, in some embodiments of the present application, a brightness adjustment button 501 is disposed on the remote controller 500, the brightness adjustment button 501 is electrically connected to the main control module 200, and the brightness adjustment button 501 may be used to adjust a duty ratio parameter of the control signal.
In the embodiment of the present application, the backlight brightness of the display screen of the remote controller 500 can be automatically adjusted along with the ambient light brightness, and can also be manually adjusted through the brightness adjustment key 501.
Specifically, the main control module 200 may preset an association record table of duty ratio parameters and backlight brightness, and the association record table may record a plurality of corresponding relationships between the duty ratio parameters and the backlight brightness in an association manner, for example, when the backlight brightness is 100%, the duty ratio parameters may be corresponding to "10: 1 ", where 10 corresponds to the output duration of the high level signal, and 1 corresponds to the output duration of the low level signal; a backlight brightness of 50% may correspond to duty cycle parameters such as "5: 1 ", likewise, 5 corresponds to the output period of the high level signal, and 1 corresponds to the output period of the low level signal.
A user can select the backlight brightness of the display screen desired by the user through the brightness adjusting key 501, and the main control module 200 can find the corresponding duty ratio parameter according to the backlight brightness selected by the user, so as to output a control signal to the backlight driving module 300 based on the duty ratio parameter, so as to adjust the backlight brightness of the backlight source 301.
It is understood that the remote controller 500 may further be provided with a selection key for selecting a brightness adjustment mode, and through the selection key, the user may select automatic adjustment or manual adjustment of the backlight brightness according to actual requirements.
In addition, when the ambient light brightness is bright or the battery of the remote controller is insufficient, the user can adjust the backlight brightness to be 0% through the brightness adjusting key 501, that is, the backlight 301 is turned off, so as to reduce energy loss and prolong the service life of the battery, and therefore, in the embodiment of the application, the backlight brightness adjustment of the display screen in the brightness change interval of 0% -100% can be realized through the brightness adjusting key 501.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, which are not described herein again.
In a specific implementation, each unit or structure may be implemented as an independent entity, or may be combined arbitrarily to be implemented as one or several entities, and the specific implementation of each unit or structure may refer to the foregoing embodiments, which are not described herein again.
The backlight adjusting circuit and the remote controller provided by the present application are introduced in detail, and a specific example is applied in the present application to explain the principle and the implementation of the present application, and the above description is only used to help understand the circuit and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A backlight adjusting circuit is characterized by comprising a light induction module, a main control module and a backlight driving module, wherein the main control module is respectively and electrically connected with the light induction module and the backlight driving module, and the backlight driving module is provided with a backlight source;
the light sensing module is used for generating a voltage signal according to a real-time sensed ambient light signal and sending the voltage signal to the main control module;
the main control module is used for obtaining a corresponding control signal according to the voltage signal and sending the control signal to the backlight driving module;
and the backlight driving module is used for adjusting the backlight brightness of the backlight source according to the control signal.
2. The backlight adjusting circuit of claim 1, wherein the control signal is configured with a duty cycle parameter, and the backlight driving module is configured to adjust the on-time of the backlight source according to the duty cycle parameter of the control signal to adjust the backlight brightness of the backlight source.
3. The backlight adjusting circuit of claim 2, wherein the control signal comprises a high level signal and a low level signal, and the duty cycle parameter is used to characterize a duration of the high level signal in one period;
when the control signal is the high level signal, the backlight source is conducted to emit light; and when the control signal is the low level signal, the backlight source is cut off and does not emit light.
4. The backlight adjusting circuit according to claim 3, wherein the backlight source is a light emitting diode, the backlight driving module comprises a first transistor and a second transistor, the main control module is connected to a base of the first transistor, an emitter of the first transistor is connected to a base of the second transistor, an emitter of the second transistor is grounded, a collector of the second transistor is connected to a cathode of the light emitting diode, and an anode of the light emitting diode is connected to a power supply.
5. The backlight adjusting circuit of claim 1, wherein the light sensing module comprises a light sensing unit and a voltage dividing unit, the light sensing unit is electrically connected to the voltage dividing unit, and a connection between the light sensing unit and the voltage dividing unit is electrically connected to the main control module;
the photosensitive unit is used for sensing the ambient light signal in real time and converting the ambient light signal into a corresponding current signal;
the voltage division unit is used for generating the voltage signal according to the current signal and sending the voltage signal to the main control module.
6. The backlight adjusting circuit of claim 5, wherein the light sensing unit is a light sensor, the voltage dividing unit is a first resistor, a first end of the light sensor is connected to a power supply, a second end of the light sensor is respectively connected to the first end of the first resistor and the main control module, and a second end of the first resistor is grounded.
7. The backlight adjusting circuit of claim 5, wherein the light sensing module further comprises a current limiting unit, and a connection between the light sensing unit and the voltage dividing unit is electrically connected to the main control module through the current limiting unit;
and the current limiting unit is used for limiting the current of the current signal flowing into the main control module.
8. The backlight adjusting circuit of claim 7, wherein the current limiting unit is a second resistor, a first end of the second resistor is connected to the main control module, and a second end of the second resistor is connected to a connection between the light sensing unit and the voltage dividing unit.
9. A remote control characterized in that the remote control comprises the backlight adjusting circuit of any one of claims 1 to 8.
10. The remote controller according to claim 9, wherein a brightness adjustment key is disposed on the remote controller, the brightness adjustment key is electrically connected to the main control module, and the brightness adjustment key is used for adjusting a duty ratio parameter of the control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123040124.7U CN216697783U (en) | 2021-12-02 | 2021-12-02 | Backlight adjusting circuit and remote controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123040124.7U CN216697783U (en) | 2021-12-02 | 2021-12-02 | Backlight adjusting circuit and remote controller |
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| Publication Number | Publication Date |
|---|---|
| CN216697783U true CN216697783U (en) | 2022-06-07 |
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| CN202123040124.7U Active CN216697783U (en) | 2021-12-02 | 2021-12-02 | Backlight adjusting circuit and remote controller |
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| CN (1) | CN216697783U (en) |
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2021
- 2021-12-02 CN CN202123040124.7U patent/CN216697783U/en active Active
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