CN222047647U

CN222047647U - LED table lamp with stable and adjustable illuminance

Info

Publication number: CN222047647U
Application number: CN202420283588.5U
Authority: CN
Inventors: 林炳炎; 侯麦笛; 吴邦辉; 刘英琪; 林力
Original assignee: Fujian Polytechnic of Information Technology
Current assignee: Fujian Polytechnic of Information Technology
Priority date: 2024-02-06
Filing date: 2024-02-06
Publication date: 2024-11-22
Anticipated expiration: 2034-02-06

Abstract

The utility model relates to an illumination stable and adjustable LED table lamp, which comprises a microcontroller, an illumination sensor, a DAC module, an LED lamp panel, a matrix keyboard, a liquid crystal display module and a power module, wherein the microcontroller is electrically connected with the illumination sensor, and is also electrically connected with the LED lamp panel through the DAC module so as to self-adaptively adjust the brightness of the LED lamp panel by detecting the illumination intensity of the surrounding environment; the matrix keyboard is electrically connected with the microcontroller to switch the automatic brightness adjustment mode and the manual brightness adjustment mode; the microcontroller is connected with the liquid crystal display module to display an automatically detected illuminance value and a manually set brightness value; the power module is used for being connected with commercial power and supplying power for the whole LED desk lamp. The LED table lamp is simple in structure and easy to realize, and can provide stable and adjustable illuminance in different environments.

Description

LED table lamp with stable and adjustable illuminance

Technical Field

The utility model relates to an LED table lamp with stable and adjustable illuminance.

Background

The traditional desk lamp has single adjusting function, and can only realize simple adjustment of illuminance according to gears. Along with the development of technology, people also put forward higher requirements on the intellectualization and functionalization of the desk lamp. In the prior art, there are a plurality of LED table lamps capable of performing electrodeless dimming or with remote control, and although the adjusting effect or the using convenience of the LED table lamps are improved, the brightness of the table lamps can not be adaptively adjusted according to the illumination condition of the surrounding environment. At present, some LED table lamps capable of intelligently adjusting illuminance according to ambient illuminance also appear on the market, but some of the products are poor in adjusting effect, some of the products are inconvenient in mode switching, and some of the products do not have corresponding display functions so as to intuitively display the current environment and working condition of the LED table lamp.

Disclosure of Invention

The utility model aims to provide an LED table lamp with stable and adjustable illuminance, which has a simple structure, is easy to realize and can provide stable and adjustable illuminance in different environments.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a stable adjustable LED desk lamp of illuminance, includes microcontroller, illuminance sensor, DAC module, LED lamp plate, matrix keyboard, liquid crystal display module and power module, microcontroller and illuminance sensor electric connection, microcontroller still passes through DAC module and LED lamp plate electric connection to through detecting surrounding environment illumination intensity self-adaptation adjustment LED lamp plate's luminance; the matrix keyboard is electrically connected with the microcontroller to switch the automatic brightness adjustment mode and the manual brightness adjustment mode; the microcontroller is connected with the liquid crystal display module to display an automatically detected illuminance value and a manually set brightness value; the power module is used for being connected with commercial power and supplying power for the whole LED desk lamp.

Further, the microcontroller adopts a C8051F560 singlechip to realize PWM dimming control and flexibly adjust the brightness of the LED lamp panel, so that the desk lamp can provide stable and adjustable illuminance in different environments.

Further, the illuminance sensor adopts a BH1750 digital illuminance sensor so as to realize high-precision perception of the illuminance intensity of the surrounding environment; the SCL pin of BH1750 is connected with the I2C clock line of the microcontroller, and the SDA pin of BH1750 is connected with the I2C data line of the microcontroller; the microcontroller reads the measurement result in the BH1750 register through the I2C and analyzes the measurement result into an actual illuminance value.

Further, the DAC module is provided with a PWM control pin for receiving PWM signals, the PWM control pin of the DAC module is connected with a PWM output pin of the microcontroller, and the output of the DAC module is connected with the LED lamp panel.

Further, the liquid crystal display module adopts an LCD1602 liquid crystal display module, and the LCD1602 liquid crystal display module includes 16 pins, specifically:

VSS: a ground pin connected to ground of the power supply;

VDD: i.e. a power supply pin, connected to the positive pole of the power supply;

V0: namely a contrast adjusting pin which is used for adjusting the contrast of display and is connected with a potentiometer;

RS: i.e. a register select pin for controlling whether data or command is input; the high level is data, the low level is command;

RW: i.e., a read/write select pin, for selecting whether to read or write; low level when reading data, high level when writing data;

EN: even an enable pin for enabling a signal to trigger the LCD1602 to accept data or commands on a rising or falling edge;

D0 to D7: i.e., a parallel data bit pin for transmitting 8 bits of data;

a: i.e., a backlight anode pin, connected to the anode of the backlight;

K: i.e. the backlight cathode lead, is connected to the negative electrode of the backlight.

Further, the power supply module has voltage adaptability, so that when the input voltage changes between 10V and 15V, the brightness of the LED desk lamp is kept stable and is not influenced by power supply fluctuation.

Compared with the prior art, the utility model has the following beneficial effects: the utility model provides an LED table lamp with stable and adjustable illuminance, which combines various technologies such as illuminance detection, PWM dimming, information interaction and the like, can adaptively adjust the brightness of an LED lamp panel according to the ambient environment illuminance intensity, can flexibly switch an automatic mode and a manual mode and flexibly set the brightness, can display the illuminance detection and the manual setting result in real time, and realizes providing stable and adjustable illuminance in different environments.

Drawings

FIG. 1 is a schematic block diagram of an LED table lamp with stable and adjustable illuminance according to an embodiment of the present utility model;

FIG. 2 is a circuit diagram of a microcontroller in an embodiment of the utility model;

FIG. 3 is a circuit diagram of an illuminance sensor in an embodiment of the present utility model;

FIG. 4 is a circuit diagram of a DAC module in an embodiment of the utility model;

fig. 5 is a circuit diagram of a liquid crystal display module according to an embodiment of the utility model.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

As shown in fig. 1, the embodiment provides an LED desk lamp with stable and adjustable illuminance, which comprises a microcontroller, an illuminance sensor, a DAC module, an LED lamp panel, a matrix keyboard, a liquid crystal display module and a power module, wherein the microcontroller is electrically connected with the illuminance sensor, and is also electrically connected with the LED lamp panel through the DAC module, so as to adaptively adjust the brightness of the LED lamp panel by detecting the illuminance intensity of the surrounding environment; the matrix keyboard is electrically connected with the microcontroller to switch the automatic brightness adjustment mode and the manual brightness adjustment mode; the microcontroller is connected with the liquid crystal display module to display an automatically detected illuminance value and a manually set brightness value; the power module is used for being connected with commercial power and supplying power for the whole LED desk lamp.

As shown in fig. 2, the microcontroller adopts a C8051F560 singlechip to realize PWM dimming control, and flexibly adjust the brightness of the LED lamp panel, so that the desk lamp can provide stable and adjustable illuminance in different environments.

The C8051F560 microcontroller is an 8-bit MCU which is proposed by Silicon Labs company, is based on an 8051 kernel, and is suitable for various embedded systems. The MCU supports operating frequencies up to 25MHz, providing a rich peripheral interface including a communication interface (UART, SPI, I C), analog peripherals (ADC, DAC), etc. A developer may write a C language or assembly language program through an integrated development environment and store it through a Flash memory. In design, external equipment needs to be connected, power management and low power consumption design are considered, and system functions are realized through interrupt processing, debugging tools and communication protocols. In general, C8051F560 provides a simple, flexible solution, suitable for a wide range of embedded applications.

As shown in fig. 3, the illuminance sensor adopts a BH1750 digital illuminance sensor to realize high-precision sensing of the illuminance intensity of the surrounding environment. BH1750 typically communicates over an I2C interface. BH1750 typically operates in the range of 2.4V to 3.6V. When the power supply is connected, the voltage is ensured to be within a specified range. The SCL pin of BH1750 is connected with the I2C clock line of the microcontroller, and the SDA pin of BH1750 is connected with the I2C data line of the microcontroller; the microcontroller reads the measurement result in the BH1750 register through the I2C and analyzes the measurement result into an actual illuminance value.

As shown in fig. 4, the DAC module has a PWM control pin, which is configured to receive a PWM signal, the PWM control pin of the DAC module is connected to a PWM output pin of the microcontroller, and an output of the DAC module is connected to the LED lamp panel. The frequency of the PWM is set as required, typically between several kilohertz and tens of kilohertz. By adjusting the PWM duty cycle, a PWM signal is sent to control the intensity of the LED.

The matrix keyboard is used as a user interaction tool, so that a user can conveniently switch between an automatic adjustment mode and a manual adjustment mode, and personalized lighting experience is customized.

The LCD1602 liquid crystal display module serves as a user interface for displaying automatically detected illumination values and real-time adjusted brightness settings, providing intuitive feedback information. As shown in fig. 5, the LCD1602 liquid crystal display module is adopted as the liquid crystal display module, and the LCD1602 liquid crystal display module includes 16 pins including a power pin, a control pin and a data pin, and the following are specific pin configurations:

VSS: a ground pin connected to ground of the power supply;

D0 to D7: i.e., a parallel data bit pin for transmitting 8 bits of data;

a: i.e., a backlight anode pin, connected to the anode of the backlight;

The power supply module has voltage adaptability, so that when the input voltage changes between 10V and 15V, the brightness of the LED desk lamp is kept stable and is not influenced by power supply fluctuation.

The LED table lamp with stable and adjustable illuminance provided by the utility model introduces advanced elements such as a BH1750 sensor, a PWM dimming technology, an LCD1602 display screen, a matrix keyboard and the like, and has the following innovation:

Intelligent perception and adaptive dimming: the intelligent LED lamp panel has the advantages that the accurate perception of the illuminance of the surrounding environment is realized, the illuminance information is obtained in real time through the BH1750 sensor, and the illuminance of the LED lamp panel can be intelligently and adaptively adjusted, so that the work or living area is always in an optimal illumination state.

Humanized manual adjustment: the matrix keyboard has the advantages that the selection of manually adjusting the brightness of a user is provided, the convenient operation is realized through the matrix keyboard, the user can adjust the illumination brightness level at any time according to personal requirements, and personalized illumination experience is realized.

Information display and interaction: the LCD1602 display screen is introduced to clearly display the illuminance value of the current environment, providing intuitive information feedback for the user. Through the interactive design of the matrix keyboard, a user can easily realize manual adjustment and mode switching.

Stability and efficiency: through adopting PWM technique of adjusting luminance, realize the steady dimming to the LED lamp plate, avoid stroboscopic phenomenon, ensure the stability and the high efficiency of illumination, provide more healthy and comfortable lighting environment for the user.

Through integrating the perception technology, the dimming technology, the interaction design and the power supply adaptability, the utility model provides an innovative intelligent lighting product, which has the following effects:

1. Intelligent perception: through introducing advanced light sensor, realize the accurate perception to surrounding environment illuminance, make the desk lamp can intelligent regulation illumination intensity, provide the illuminating effect who accords with the service scene more.

2. Flexible dimming: by adopting the PWM dimming technology, a user can easily adjust the brightness of the LED lamp panel in an automatic adjustment or manual setting mode, personalized lighting experience is realized, and the control right of the user on the illumination environment is improved.

3. And (3) information interaction: an LCD1602 display module is introduced to intuitively and clearly display the automatically detected illuminance value and the manually adjusted real-time illuminance value, and provide a convenient information feedback and interaction interface for a user.

4. Power supply adaptability: the design possesses voltage adaptability for when input voltage was changed between 10V and 15V, the luminance of LED desk lamp can remain stable, does not receive the fluctuation of power to influence, promotes the reliability of product.

5. User health protection: in the brightness adjustment process, through special design, the LED desk lamp is ensured not to generate stroboscopic, potential influence on visual health of a user is effectively reduced, and more comfortable illumination experience is provided.

The working method of the LED table lamp with stable and adjustable illuminance comprises the following steps: the user first operates the matrix keypad to monitor and display the current ambient illuminance value in real time through the embedded LCD1602 module. The desk lamp is provided with an illumination sensor BH1750, and the singlechip outputs variable PWM waves to the LED lamp panel through sensing ambient illuminance so as to automatically or manually adjust each brightness. The matrix keyboard arrangement enables the user to easily switch between automatically adjusting the brightness and manually adjusting the brightness.

The whole device not only has the functions of intelligent perception and self-adaptive illuminance adjustment, but also adopts a stroboscopic-free design, and the stimulation to eyes of a user is effectively reduced. More importantly, the change of the input voltage between 10V and 15V does not affect the brightness performance of the desk lamp, and more stable and reliable illumination experience is provided for users.

Through the interaction of the matrix keyboard and the LCD1602 module, a user can realize manual setting of the desk lamp and real-time working state of the monitoring device. The design of the two-way communication ensures that the user fully controls the intelligent home device. The frame of the whole device enables a user to control illuminance more conveniently and intelligently.

In an actual application scene, the LED table lamp with stable and adjustable illuminance provides excellent illumination experience for users through intelligent design and humanized operation. The user simply turns on the power supply during use, the whole device is instantly started, and ambient illuminance is sensed. By accurate sensing of the BH1750 sensor, the device can respond quickly, ensuring that the working area remains at a comfortable level of illumination at all times.

In the automatic mode, the LED lamp panel intelligently realizes the self-adaptive adjustment of illuminance by adjusting PWM waves. The intelligent dimming mode not only can ensure the stability of ambient lighting, but also can dynamically adjust the illumination intensity according to the change of the surrounding environment, thereby providing more comfortable lighting environment which meets the actual demands for users.

In addition, the user can also select to manually adjust the brightness, and the operation is performed through the matrix keyboard on the desk lamp. This design takes into account the difference in the user's individual lighting needs, and by simple key operation, the user can adjust the brightness level according to his own needs at any time. The LCD1602 display clearly reflects the current illumination value, enabling the user to intuitively understand the current illumination state.

The design concept of the whole device aims at providing an intelligent, convenient and personalized lighting solution for users. By adopting the advanced induction technology, the intelligent dimming scheme and the humanized operation interface, the LED table lamp with stable and adjustable illuminance not only meets the high requirement of a user on the lighting effect, but also simplifies the use flow of the user, and adds convenience and comfort for modern intelligent home life.

The above description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. The LED table lamp is characterized by comprising a microcontroller, an illuminance sensor, a DAC module, an LED lamp panel, a matrix keyboard, a liquid crystal display module and a power module, wherein the microcontroller is electrically connected with the illuminance sensor, and the microcontroller is also electrically connected with the LED lamp panel through the DAC module so as to self-adaptively adjust the brightness of the LED lamp panel by detecting the illuminance intensity of surrounding environment; the matrix keyboard is electrically connected with the microcontroller to switch the automatic brightness adjustment mode and the manual brightness adjustment mode; the microcontroller is connected with the liquid crystal display module to display an automatically detected illuminance value and a manually set brightness value; the power module is used for being connected with commercial power and supplying power for the whole LED desk lamp.

2. The stable and adjustable illuminance LED table lamp of claim 1 wherein the microcontroller uses a C8051F560 single chip microcomputer to implement PWM dimming control.

3. The stable and adjustable illuminance LED desk lamp of claim 1 wherein the illuminance sensor is a BH1750 digital illuminance sensor to realize high accuracy sensing of the illuminance intensity of the surrounding environment; the SCL pin of BH1750 is connected with the I2C clock line of the microcontroller, and the SDA pin of BH1750 is connected with the I2C data line of the microcontroller; the microcontroller reads the measurement result in the BH1750 register through the I2C and analyzes the measurement result into an actual illuminance value.

4. The stable and adjustable illuminance LED table lamp of claim 1, wherein the DAC module has a PWM control pin for receiving a PWM signal, the PWM control pin of the DAC module is connected to a PWM output pin of the microcontroller, and the output of the DAC module is connected to the LED lamp panel.

5. The LED desk lamp with stable and adjustable illuminance according to claim 1, wherein the liquid crystal display module is an LCD1602 liquid crystal display module, and the LCD1602 liquid crystal display module comprises 16 pins, specifically:

VSS: a ground pin connected to ground of the power supply;

D0 to D7: i.e., a parallel data bit pin for transmitting 8 bits of data;

a: i.e., a backlight anode pin, connected to the anode of the backlight;

6. The LED desk lamp of claim 1, wherein the power module has voltage adaptability such that the brightness of the LED desk lamp remains stable and is not affected by power supply fluctuations when the input voltage varies between 10V and 15V.