CN201344408Y

CN201344408Y - AC/DC LED double light source desk lamp

Info

Publication number: CN201344408Y
Application number: CNU2009200024960U
Authority: CN
Inventors: 卫家宣
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-30
Filing date: 2009-01-30
Publication date: 2009-11-11
Anticipated expiration: 2019-01-30

Abstract

The utility model provides a two light source desk lamps of two LED of AC-DC dual-purpose, by the transformer, the rectifier, current limiting resistor, AC-DC change over switch, and by the AC-DC power after LED pipe, current limiting resistor, rechargeable battery electricity links, select the main light source of illumination that comprises the white luminous LED pipe of hi-lite through the light source switch, or the auxiliary light source that comprises the green luminous LED pipe of hi-lite, can the using electricity wisely, reduce the battery and consume, do not influence the illumination during the power failure, can satisfy the illumination needs of writing, reading, green light source is favorable to alleviating eye fatigue and adjusting indoor atmosphere, the nickel-hydrogen battery is small, large capacity, do not contain toxic element, can increase illumination time, be favorable to health and environmental protection.

Description

AC/DC LED double light source desk lamp

Technical Field

The utility model relates to a two light source desk lamps of two dual-purpose LED of straight.

Background

The LED table lamp sold in the market adopts a high-brightness white light-emitting LED tube as a light source, the light source is single, most of power supplies of the LED table lamp adopt disposable batteries, such as a zinc-manganese battery and an alkaline battery, the power supply is single, the battery consumption is large, the cost is high, meanwhile, the batteries contain heavy metals harmful to human health and causing environmental pollution, such as mercury, lead and other substances, along with the improvement of living standard, health and environmental awareness, the current LED table lamp with the single light source and the battery containing the harmful substances cannot meet the requirement of using the table lamp for illumination in daily life of people.

Disclosure of Invention

For solving current LED table lamp light source singleness, the power is single, contains the not enough of harmful substance in the battery, the utility model provides a two light source table lamps of dual-purpose LED of AC and DC.

The utility model provides a technical scheme that its technical problem adopted is: one end of a primary coil of a 220V transformer is connected with a power switch in series, two ends of a secondary coil are connected with a rectifier consisting of LED tubes, the anode of the rectifier is connected with a current-limiting resistor R1 in series and then connected with one end of an AC-DC conversion switch, the AC-DC conversion switch is connected with a light source switch, one end of the light source switch is connected with a high-brightness white light-emitting LED tube, the other end of the light source switch is connected with a current-limiting resistor R2 in series and then connected with a high-brightness green light-emitting LED tube, and the cathode of the high-brightness white light-emitting LED tube and the cathode of the high-brightness green light-emitting LED tube are connected with the cathode of the rectifier; one end of the secondary coil is connected with the LED tube and the current-limiting resistor R4 in series, the current-limiting resistor R5 is connected with the red light-emitting LED tube in series and then connected with the current-limiting resistor R4 in parallel, and then connected with the anode of the rechargeable battery, the red light-emitting LED tube is a charging indicator lamp, the cathode of the rechargeable battery is connected with the cathode of the rectifier, the anode of the rechargeable battery is connected with the current-limiting resistor R3 in series and then connected with one end of the AC-DC conversion switch, and the DC power supply serves as a DC power supply for the high-brightness white light-emitting LED tube and the high-brightness green light-emitting LED tube.

LED double-light source desk lamp, be under a semicircular bar lamp shade, set up an curved reflector and mounting panel, and fix on bar lamp shade through countersunk screw, be provided with several rows of white luminous LED of hi-lite and the green luminous LED pipe of hi-lite on the mounting panel, bar lamp shade top is provided with a screwed pipe, the screwed pipe both ends are connected with the lamp stand of bar lamp shade and rectangle box body respectively, the screwed pipe can the left and right sides, the upper and lower bending, be provided with switch on the lamp stand, AC-DC change-over switch, the light source switch, the charge indicator, install the transformer in the lamp stand, the rectifier, current-limiting resistor, rechargeable battery.

The high-brightness white light-emitting LED tube is used as a main light source for reading, writing and working illumination, and the green light source of the high-brightness green light-emitting LED tube is beneficial to relieving eye fatigue and adjusting indoor environment atmosphere and is used as an auxiliary light source for rest after work fatigue and indoor general life illumination.

The rechargeable battery adopts a nickel-hydrogen battery, the battery does not contain toxic elements such as cadmium, lead, mercury and the like, does not cause harm to health and environment, has small volume and large capacity, and can prolong the illumination time when direct current is used.

The working principle is that a power switch is switched on, when 220V alternating current mains supply passes through a primary transformer, a low-voltage alternating current power supply is obtained at a secondary transformer, the power supply is output in two paths, one path of the low-voltage alternating current power supply is rectified by a rectifier consisting of LED tubes to obtain a direct current power supply, and the direct current power supply is used as an alternating current power supply of the table lamp after current limiting; another way gets a pulsation DC power supply after LED pipe half-wave rectification, is as rechargeable battery's charging source after the current-limiting, and rechargeable battery is as desk lamp's DC power supply, for keeping apart two powers, be provided with single-pole double-throw's AC-DC change-over switch in the circuit, can select according to needs when using, and the light source switch is used for selecting high brightness white luminous LED pipe or the illumination of high brightness green luminous LED pipe.

After the voltage is reduced by the power transformer, the mains supply is isolated from the power supply for the lamp, so that the voltage is in a low-voltage direct-current power supply state, the safety of the contact of a human body with the lamp is ensured, and meanwhile, because the ratio of the mains voltage to the working voltage is larger, the influence of the change of the mains voltage on the working voltage is small, so that the illumination brightness is ensured, the requirements of writing, reading and indoor illumination are met, and the alternating-direct dual-purpose power supply is adopted, so that the power consumption is saved, the battery consumption is reduced, and the illumination cannot be influenced during power failure.

The LED lamp adopts 40 high-brightness white light-emitting LED tubes which are assembled on an installation plate in two rows to serve as a main lighting source, each LED tube has the current of 15mA, the voltage of 3V and the power of less than 2W, the brightness is greater than that of an 8W energy-saving lamp, 20 high-brightness green light-emitting LED tubes are assembled between the two rows of high-brightness white light-emitting LED tubes, each LED tube has the current of 15mA, the voltage of 3V and the power of less than 1W, all objects in a room can be seen clearly, 4 AA type nickel-hydrogen batteries are adopted, the charging current is 80-100mA, the voltage of 6V and the power of less than 1W are used alternately by main lighting and auxiliary lighting, and the total power consumption (including transformer loss) is less than 4W.

The utility model has the advantages that: the dual-purpose power supply of alternating current and direct current is adopted, the power consumption can be saved, the battery consumption is reduced, the illumination is not influenced during the power failure, the dual-light source desk lamp can meet the requirements of writing and reading illumination, the green light source is beneficial to relieving the eye fatigue and adjusting the indoor gas dispute, the nickel-hydrogen battery has small volume and large capacity, does not contain toxic elements, can increase the illumination time, and is beneficial to health and environmental protection.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic circuit diagram of an embodiment of the present invention.

Fig. 2 is a basic schematic diagram of an embodiment of the present invention.

In the figure; 1. the LED lamp comprises a power switch, 2 a transformer, 3 a primary coil, 4 a secondary coil, 5 a rectifier, 6 a current-limiting resistor R1, R2, R3, R4, R5,7 an AC-DC conversion switch, 8 a light source switch, 9 a high-brightness white light-emitting LED tube, 10 a high-brightness green light-emitting LED tube, 11 an LED tube, 12 a charging indicator lamp, 13 a charging battery, 14 a bar-shaped lampshade, 15 an installation plate, 16 a reflector, 17 a countersunk head screw, 18 a threaded tube and 19 a lamp holder.

Detailed Description

In fig. 1, one end of a primary coil (3) of a transformer (2) is connected with a power switch (1), two ends of a secondary coil (4) are connected with a rectifier (5), the anode of the rectifier (5) is connected with a current limiting resistor R1 (6) in series and then connected with one end of an ac-dc conversion switch (7), the ac-dc conversion switch (7) is connected with a light source switch (8), one end of the light source switch (8) is connected with a high-brightness white light-emitting LED tube (9), the other end of the light source switch is connected with a current limiting resistor R2 (6) in series and then connected with a high-brightness green light-emitting LED tube (10), and the cathodes of the high-brightness white light-emitting LED tube (9) and the high-brightness green light-emitting LED tube (10) are connected with the cathode of the rectifier (5); one end of the secondary coil (4) is connected with the LED tube (11) and the current-limiting resistor R4 (6) in series, the current-limiting resistor R5 (6) is connected with the charging indicator lamp (12) in series and then connected with the current-limiting resistor R4 (6) in parallel, and then connected with the anode of the charging battery (13), the anode is connected with the current-limiting resistor R3 (6) in series and then connected with one end of the AC-DC conversion switch (7), and the cathode is connected with the cathode of the rectifier (5).

In fig. 2, a reflector (16) and a mounting plate (15) are arranged below a bar-shaped lampshade (14) and fixed on the bar-shaped lampshade (14) through a countersunk screw (17), a high-brightness white light-emitting LED tube (9) and a high-brightness green light-emitting LED tube (10) are arranged on the mounting plate (15), a screwed tube (18) is arranged at the top of the bar-shaped lampshade (14), two ends of the screwed tube are respectively connected with the bar-shaped lampshade (14) and a lamp holder (19), a power switch (1), an alternating-direct conversion switch (7), a light source switch (8) and a charging indicator lamp (12) are arranged on the lamp holder (18), and a transformer (2), a rectifier (5), a current-limiting resistor (6) and a charging battery (13) are arranged in the lamp holder (18).

Claims

The AC/DC dual-purpose LED double-light-source desk lamp is characterized in that a main lighting light source consisting of high-brightness white light-emitting LED tubes or an auxiliary light source consisting of high-brightness green light-emitting LED tubes is selected through a light source switch by a transformer, a rectifier, a current-limiting resistor, an AC/DC conversion switch and an AC/DC power supply which is electrically connected by LED tubes, the current-limiting resistor and a rechargeable battery; two ends of the secondary coil (4) are connected with a rectifier (5), and the anode of the rectifier is connected with a current-limiting resistor R1 (6) in series and then connected with one end of an AC-DC conversion switch (7); one end of the secondary coil is connected with the LED tube (11) and the current-limiting resistor R4 (6) in series, the current-limiting resistor R5 (6) is connected with the charging indicator lamp (12) in series and then connected with the current-limiting resistor R4 in parallel, and then connected with the anode of the rechargeable battery (13), the cathode of the rechargeable battery is connected with the cathode of the rectifier, the anode of the rechargeable battery is connected with the current-limiting resistor R3 (6) in series and then connected with one end of the AC-DC change-over switch, and the AC-DC change-over switch is connected with the light source switch (8).
The AC/DC LED table lamp of claim 1, wherein: one end of the light source switch is connected with the high-brightness white light-emitting LED tube (9), and the other end of the light source switch is connected with the high-brightness green light-emitting LED tube (10) after being connected with the current limiting resistor R2 (6) in series.