CN201377726Y

CN201377726Y - LED dimming desk lamp

Info

Publication number: CN201377726Y
Application number: CN200920146861U
Authority: CN
Inventors: 卫家宣
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-30
Filing date: 2009-03-30
Publication date: 2010-01-06
Anticipated expiration: 2019-03-30

Abstract

The utility model discloses an LED dimming desk lamp. A mounting plate and a reflecting shade are arranged below a strip type lampshade and fixed by a countersunk screw. The mounting plate is provided with a plurality of rows of high-brightness white light-emitting LED pipes as illuminating light sources, an illuminating power source is supplied by a voltage regulator, a transformer, a rectifier and a current limiting resistor that are electrically connected. The illuminating power source is separated from electric supply after the transformer reduces voltage to ensure the safety when the human body touches the power source. The illuminating brightness can be adjusted according to needs in virtue of a dimming knob of the voltage regulator to meet the illuminating requirements of writing, reading, etc.

Description

The LED lamp dimmer

Affiliated technical field

The utility model belongs to ligthing paraphernalia, relates to a kind of LED lamp dimmer.

Background technology

1, the LED desk lamp of commercially available employing direct current supply, its power supply are general dry battery or rechargeable battery, are saves energy, and the effective amount of LED is few, and brightness is limited can't be regulated, and can not satisfy the needs of highlight illumination requirement.

2, the LED desk lamp of commercially available employing Alternating Current Power Supply, adopt civil power to supply with for saving its power supply of cost through the resistance-capacitance depressurization circuit, the effective amount of LED is many, brightness is big, but needs the low-light level illumination time can't regulate, and not only reactive loss is big for this step-down mode, line-to-earth voltage is still the 220V civil power in galvanization simultaneously, can bring certain hidden danger to the personal safety meeting when damaging if any fluorescent tube.

Summary of the invention

For overcoming the deficiency that commercially available AC and DC LED desk lamp can't light modulation, the utility model provides a kind of LED lamp dimmer.

The technical scheme that its technical problem that solves the utility model adopts is: the LED lamp dimmer, be under a semicircular bar shaped lampshade, the reflection shield of an installing plate and arc is set, and be fixed on the bar shaped lampshade through countersunk head screw, installing plate is provided with the white emitting led pipe of number row's high brightness and makes lighting source, bar shaped lampshade top is provided with a screwed pipe, the screwed pipe two ends are connected with the lamp socket of bar shaped lampshade and rectangle box body respectively, about the screwed pipe energy, crooked up and down, lamp socket is provided with the light modulation turn-knob, and the pressure regulator after being electrically connected is installed in the lamp socket, transformer, rectifier, current-limiting resistance.

The mains lighting supply of the white emitting led pipe of high brightness by the 220V city by through pressure regulator, transformer, rectifier, after being electrically connected, current-limiting resistance supplies with, pressure regulator is by electric capacity, resistance, potentiometer W behind polyphone again with bidirectional triode thyristor and connect, resistance links to each other with an end of bidirectional trigger diode with the junction of electric capacity, the other end of bidirectional trigger diode links to each other with the T1 of bidirectional triode thyristor end, one end of the coaxial switch of potentiometer W is connected as power switch with city's power supply, one end of the primary coil of transformer is connected with pressure regulator one end, the other end links to each other with civil power, the secondary coil of transformer and the input of rectifier also connect, link to each other with the positive pole of the white emitting led pipe of high brightness behind the positive pole of output and the current-limiting resistance polyphone, negative pole links to each other with the rectifier negative pole again.

Its operation principle is, after 220V electric main source enters regulator circuit, electric current is just carrying out electric capacity by resistance, reverse charging, when the charging voltage on the electric capacity is higher than the bidirectional trigger diode break over voltage, the bidirectional trigger diode conducting, and triggering bidirectional triode thyristor conducting, the resistance size of potentiometer in the regulating circuit, can change the speed of electric capacity charging, the silicon controlled angle of flow is changed, enter the supply voltage of transformer thereby change, on transformer time coil, also obtain a corresponding low-tension supply simultaneously, this power supply is through rectification, after the current limliting, provide the mains lighting supply of a white emitting led pipe of high brightness, the resistance size of regulator potentiometer just can change brightness of illumination.

Characteristics such as high brightness white hair optical diode has the high and low energy consumption of brightness, the life-span is long, response speed is fast, volume is little, civil power is after the transformer step-down, isolate with the mains lighting supply of high brightness white hair optical diode, this power supply is in the low-voltage DC supply state, guarantee the safety that human body contacts with it, light modulation turn-knob by pressure regulator can be regulated brightness of illumination on demand easily, can satisfy and write, reads and the needs of other illuminations.

The beneficial effects of the utility model are: adopt pressure regulator after being electrically connected to be provided after, transformer, rectifier, current-limiting resistance current limliting, civil power is after the transformer step-down, the mains lighting supply of the white emitting led pipe of high brightness and mains isolation, guarantee the safety that human body contacts with it, light modulation turn-knob by pressure regulator can be regulated brightness of illumination on demand, can satisfy and write, reads and the needs of other illuminations.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the circuit theory diagrams of the utility model embodiment.

Fig. 2 is the basic schematic diagram of the utility model embodiment.

1. transformers among the figure, 2. primary coil, 3. secondary coil, 4. pressure regulator, 5. capacitor C, 6. resistance R 1,7. potentiometer W, 8. switch, 9. bidirectional trigger diode, 10. bidirectional triode thyristor, 11. rectifiers, 12. current-limiting resistance R2, the white emitting led pipe of 13. high brightness, 14. bar shaped lampshades, 15. installing plate, 16. reflection shields, 17. countersunk head screws, 18. screwed pipe, 19. lamp sockets, 20. light modulation turn-knobs.

The specific embodiment

In Fig. 1, mains lighting supply is supplied with after being electrically connected by pressure regulator (4), transformer (1), rectifier (11), current-limiting resistance R2 (12) by the 220V civil power.

Pressure regulator (4) is by capacitor C (5), resistance R 1 (6), potentiometer W (7) behind polyphone again with bidirectional triode thyristor (10) and connect, resistance R 1 (6), link to each other with an end of bidirectional trigger diode (9) with the junction of capacitor C (5), the other end links to each other with the T1 end of bidirectional triode thyristor (10), one end of the coaxial switch (8) of potentiometer W (7) is connected with city's power supply, one end of the primary coil (2) of transformer (1) is connected with pressure regulator (4) one ends, the other end links to each other with civil power, the secondary coil (3) of transformer (1) and the input of rectifier (11) also connect, link to each other with the positive pole of the white emitting led pipe of high brightness (13) behind the positive pole of output and current-limiting resistance R2 (12) polyphone, negative pole links to each other with the negative pole of rectifier (11) again.

In Fig. 2, the LED lamp dimmer, be under bar shaped lampshade (14), an installing plate (15) and reflection shield (16) are set, and be fixed on the bar shaped lampshade (14) through countersunk head screw (17), installing plate (15) is provided with the white emitting led pipe of high brightness (13) and makes lighting source, the top of bar shaped lampshade (14) is provided with a screwed pipe (18), screwed pipe (18) two ends are connected with the lamp socket (19) of bar shaped lampshade (14) and rectangle box body respectively, lamp socket (19) is provided with light modulation turn-knob (20), and the pressure regulator (4) after being electrically connected is installed in the lamp socket (19), transformer (1), rectifier (11), current-limiting resistance R2 (12).

Claims

1, a kind of LED lamp dimmer, divide at the bar shaped lampshade and to put an installing plate and reflection shield, and fix through countersunk head screw, installing plate is provided with the white emitting led pipe of number row's high brightness and makes lighting source, its mains lighting supply by pressure regulator, transformer, rectifier, current-limiting resistance after being electrically connected, supply with, it is characterized in that: under the bar shaped lampshade (14), an installing plate (15) and reflection shield (16) are set, and be fixed on the bar shaped lampshade through countersunk head screw (17), installing plate is provided with the white emitting led pipe of high brightness (13) and makes lighting source.

2, the described LED lamp dimmer of root a tree name claim 1 is characterized in that: the mains lighting supply of the white emitting led pipe of high brightness, supply with by pressure regulator (4), transformer (1), rectifier (11), current-limiting resistance R2 (12) back that is electrically connected.

Pressure regulator is by capacitor C (5), resistance R 1 (6), potentiometer W (7) behind polyphone again with bidirectional triode thyristor (10) and connect, resistance R 1, link to each other with an end of bidirectional trigger diode (9) with the junction of capacitor C, the other end links to each other with the T1 end of bidirectional triode thyristor, one end of the coaxial switch of potentiometer W (8) is connected with city's power supply, one end of the primary coil of transformer (2) is connected with pressure regulator one end, the other end links to each other with civil power, the input of secondary coil of transformer (3) and rectifier also connects, link to each other with the positive pole of the white emitting led pipe of high brightness behind the positive pole of output and the current-limiting resistance R2 polyphone, negative pole links to each other with the negative pole of rectifier again.