CN202629882U - Light-emitting diode (LED) multifunctional intelligent table lamp - Google Patents

Abstract

An LED multifunctional intelligent desk lamp comprises a lampshade, a lamp holder, a curved arm, a power cord, a light emitting unit, a circuit board, a battery, a display digital tube, and function keys. The circuit board and the battery are fixed in the lamp holder, and the characteristics are as follows: the single-chip microcomputer is used as the control core, there is a small hole on the left side of the front of the lamp holder, which can detect external light and infrared rays of the human body, and there is a digital tube display in the middle of the front end of the lamp holder, which can display the brightness level and timing Time, there are two function buttons on the right side of the front of the lamp base, which can adjust the brightness and timing of the lamp, and can still illuminate after power off.

Description

A kind of LED multifunctional intelligent desk lamp

technical field

The utility model relates to a desk lamp, in particular to an LED multifunctional intelligent desk lamp which reminds a user to turn on the lamp when the external light is weak.

Background technique

The desk lamps currently used in the market cannot remind the user to turn on the light when the external light is weak, so users often forget to turn on the light, which is not good for the eyes, and the desk lamp itself does not have dimming and timing functions, and the power consumption is large. Cannot illuminate the user.

Contents of the invention

The purpose of this utility model is to avoid the deficiency that ordinary desk lamps cannot remind the user to turn on the light, and provide a multifunctional LED that reminds the user to turn on the light when the external light is weak, has dimming and timing functions, and can still illuminate after power failure. Smart desk lamp.

The technical solution adopted by the utility model to solve the technical problem is: the circuit board and the battery are fixed in the lamp holder, and the single-chip microcomputer is used as the control core. There is a small hole on the left side of the front end of the lamp holder, which can detect external light and infrared rays of the human body. There is a digital tube display in the middle of the front end of the lamp holder, which can display the brightness level and timing time. There are two function buttons on the right side of the front end of the lamp holder, which can adjust the brightness and timing of the desk lamp, and the battery is used for lighting after power failure.

The circuit board includes a switching power supply circuit, a voltage stabilizing circuit, a display circuit, a light detection circuit, a human body infrared detection circuit, and a button circuit.

In this design, the 220V voltage is stepped down by the switching power supply, one way supplies power to the light-emitting unit, and the other way supplies power to the microcontroller and other circuits through the voltage regulator circuit. When a person sits in front of the desk lamp, the infrared detection circuit of the human body sends the detected signal to the single chip microcomputer. When the external light intensity is weak, the desk lamp will send out an alarm sound to remind the user to turn on the desk lamp. The desk lamp can be turned on or off by adjusting the two-function buttons on the front of the desk lamp base, or the brightness and timing of the desk lamp can be set. There is a digital tube display in the middle of the front of the lamp base, which can display the brightness level and timing time. There is a battery inside the desk lamp base, which can still illuminate after power failure .

The beneficial effect of this design is: there is a human body infrared detection circuit, when the external light intensity is weak, the desk lamp will send out an alarm sound to remind the user to turn on the desk lamp; the desk lamp can be switched on and off or the brightness of the desk lamp can be set by adjusting the two function buttons at the front end of the desk lamp base and timing time; there is a digital tube display in the middle of the front end of the lamp holder, which can display the brightness level and timing time; there is a battery inside the base of the desk lamp, which can still illuminate after power failure; the light-emitting unit adopts LED array, which has low power consumption.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the schematic circuit diagram of the utility model.

In Figure 1, 1, lampshade; 2, light-emitting unit; 3, brightness level display tube; 6, timing time display tube; 4, human body infrared detection hole; 5, light detection hole; 7, switch button; 8, timing button ; 9, curved arm; 10, power cord; 11, base; 12, circuit board.

In Figure 2, 1, switching power supply; 2, voltage stabilizing circuit; 3, light-emitting unit; 4, single-chip microcomputer; 5, light detection circuit; 6, human body infrared detection circuit; 7, field effect tube; 8, digital tube; 9 , digital tube driving circuit; 10, switch button; 11, timing button; 12, battery; 13, buzzer; 14, triode.

Detailed ways

Referring to Fig. 1 to further describe this table lamp, the light-emitting unit (2) is embedded in the lampshade (1), one end of the curved arm (9) is connected to the lampshade (1), the other end is connected to the base (11), and the human body infrared detection hole (4) and The light detection hole (5) is on the left side of the base (11), the brightness level display tube (3) and the timing display tube (6) are set in the middle of the base (11), the switch button (7) and the timing button (8 ) is located on the right side of the base (11), and the circuit board (12) is fixed inside the base (11).

Refer to Figure 2 to further describe the lamp circuit, the positive output terminal of the switching power supply (1) is connected to the positive pole of the light-emitting unit (3) and the input terminal in of the voltage stabilizing circuit (2), and the negative pole is grounded; the ground terminal of the voltage stabilizing circuit (2) Gnd is grounded, the output terminal out outputs 5V voltage; the positive pole of the light detection circuit (5) is connected to 5V, the negative pole is grounded, and the output terminal o is connected to the ADC1 of the single-chip MCU; the positive pole D of the human body infrared detection circuit (6) is connected to 5V, and the negative pole G is grounded. The output terminal S is connected to ADC2 of the single-chip MCU; the switch button (10) is connected to P3.3 of the single-chip MCU; the timing button (11) is connected to P3.2 of the single-chip MCU; the digital tube drive circuit (9) is connected to P3.5, P3.6, P3.7; the digital tube (8) is connected to the output terminal of the digital tube drive circuit (9); the drain D of the field effect tube (7) is connected to the negative pole of the light-emitting unit (3), and the grid G is connected to the MCU of the single-chip microcomputer P3.4, the source S is grounded; the positive pole of the battery (12) is connected to the positive output terminal of the switching power supply, and the negative pole is grounded; the positive pole of the buzzer (13) is connected to 5V, and the negative pole is connected to the collector c of the triode (14); the triode (14) ) The base b is connected to the P3.1 of the MCU, and the emitter e is grounded.

The working principle of the present invention is as follows:

The 220V mains supplies power to the light-emitting unit (3) and charges the battery (12) through the switching power supply, and at the same time supplies power to other circuits through the voltage stabilizing circuit (2). The human body infrared detection circuit (6) detects the human body infrared output terminal The voltage of S changes; if the light changes, the voltage of the output terminal o of the light detection circuit (5) will change; if the MCU detects that someone is sitting in front of the lamp, and the external light is lower than the set value, P3.1 becomes high level, the triode (14) is turned on, and the buzzer (13) sounds an alarm to remind the user to turn on the light. If there is no one in front of the desk lamp, even if the external light is lower than the set value, the desk lamp will not alarm.

The user can switch the desk lamp and adjust the brightness level of the desk lamp through the button (10), and set the turn-on time of the desk lamp through the button (11), and the brightness level and timing time are displayed on the digital tube (8); the brightness of the desk lamp is determined by the PWM If the ratio is adjusted, the duty cycle is different, and the brightness of the desk lamp is different, so as to achieve the purpose of dimming. The timing function is accomplished by using the internal timer of the single-chip microcomputer. After the set time, P3.4 is pulled low, and the desk lamp goes out.

When the power grid is cut off, the battery (12) inside the desk lamp base continues to supply power to the desk lamp, thereby providing lighting for users.

Claims (2)

1. LED multifunctional intellectual desk lamp; With the single-chip microcomputer is the control core; It is characterized in that: the lamp socket front end left side has human body infrared detection hole and illumination to detect the hole; Gray scale display tube and timing display tube are arranged in the middle of the lamp socket front end, and there are switch key and timing button in lamp socket front end the right, and circuit board is fixed on base inside.

2. intelligent desk lamp according to claim 1 is characterized in that: luminescence unit adopts led array, and there is battery base inside.

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