CN201787417U - Adjustable led desk lamp - Google Patents
Adjustable led desk lamp Download PDFInfo
- Publication number
- CN201787417U CN201787417U CN201020284317XU CN201020284317U CN201787417U CN 201787417 U CN201787417 U CN 201787417U CN 201020284317X U CN201020284317X U CN 201020284317XU CN 201020284317 U CN201020284317 U CN 201020284317U CN 201787417 U CN201787417 U CN 201787417U
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- Prior art keywords
- led
- voltage regulator
- terminal voltage
- lamp
- desk lamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Y02B20/42—
Abstract
The utility model discloses an adjustable LED desk lamp which comprises a lamp holder (1) and a lamp shade (2) arranged on the lamp holder (1), and is characterized in that an LED (3) mounted on the lamp holder (1) is arranged in the lamp shade (2) and a control circuit connected with the LED (3) are arranged on the lamp holder (1). The utility model adopts the DC voltage of 2.5 V to 3.5 V as an input power supply, thereby achieving lower working voltage; since the LED is adopted as the light source, the light efficiency is higher, the energy consumption is lower, and the service life is longer (the service life reaches more than fifty thousand hours); besides, as the cost of one LED is about a few cents, the use cost is lower.
Description
Technical field
The utility model relates to a kind of light fixture, particularly a kind of adjustable LED desk lamp.
Background technology
At present, the light source of existing desk lamp (being bulb) often adopts tungsten filament lamp for general service, fluorescent tube or fluorescent lamp, but the tungsten filament lamp for general service energy input is bigger, and luminous efficiency is low, does not economize on electricity; Though fluorescent tube has power savings, service life is shorter; Fluorescent lamp luminous efficiency height, but price is expensive, and the life-span is also restricted.
The utility model content
The purpose of this utility model is, a kind of adjustable LED desk lamp is provided.The utlity model has that operating voltage is low, luminous efficiency is high, service life is long and the lower characteristics of use cost.
The technical solution of the utility model: the adjustable LED desk lamp, comprise lamp socket and the lampshade that is located on the lamp socket, it is characterized in that: be provided with the LED that is installed on the lamp socket in lampshade, lamp socket is provided with the control circuit that connects LED.
In the above-mentioned adjustable LED desk lamp, described control circuit comprises the input power supply, and the input power supply connects three-terminal voltage regulator IC, adjustable resistance R1 and LED successively, and the input of three-terminal voltage regulator IC and output all are connected with the filter capacitor of 1 μ F.。
In the aforesaid adjustable LED desk lamp, described three-terminal voltage regulator is LM317 three-terminal voltage regulator or LM117 three-terminal voltage regulator.
In the aforesaid adjustable LED desk lamp, the DC voltage of described input power supply is 2.5V～3.5V.
Compared with prior art, the utility model passes through the DC voltage of 2.5V～3.5V as the input power supply, makes operating voltage lower; Because adopt LED as light source, not only luminous efficiency is higher, and energy input is lower, the life-span can reach more than 50,000 hours, and service life is longer; How much the cost of a LED is about, and use cost is lower.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the control circuit schematic diagram.
Being labeled as in the accompanying drawing: 1-lamp socket, 2-lampshade, 3-LED.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described, but not as the foundation to the utility model restriction.
Embodiment.The adjustable LED desk lamp constitutes as illustrated in fig. 1 and 2, comprises lamp socket 1 and the lampshade 2 that is located on the lamp socket 1, and characteristics are: be provided with the LED3 that is installed on the lamp socket 1 in lampshade 2, lamp socket 1 is provided with the control circuit that connects LED3; Described control circuit comprises the input power supply, and the input power supply connects three-terminal voltage regulator IC, adjustable resistance R1 and LED successively, and the input of three-terminal voltage regulator IC and output all are connected with the filter capacitor of 1 μ F; Described three-terminal voltage regulator is LM317 three-terminal voltage regulator or LM117 three-terminal voltage regulator; Described input power source voltage is 2.5V～3.5V.
Operation principle is as follows: the input power supply input of 2.5V～3.5V, the positive pole of input power supply is connected with the voltage input end of three-terminal voltage regulator IC, the controlled end of three-terminal voltage regulator IC is connected with the negative pole of input power supply behind adjustable resistance R1, and the controlled end of three-terminal voltage regulator IC also is connected with the output of three-terminal voltage regulator IC by divider resistance R2; The voltage of exporting behind the input power supply process three-terminal voltage regulator IC is more stable, and the output of three-terminal voltage regulator IC is connected with the positive pole of LED, and the negative pole of input power supply is connected with the negative pole of LED.Present embodiment can change the output voltage values of three-terminal voltage regulator IC by regulating the resistance value of adjustable resistance R1, thereby changes the brightness of LED3; Can obtain comparatively stable voltage behind the filter capacitor C1 in parallel between the positive pole of importing power supply and the negative pole; Between the negative pole of the output of three-terminal voltage regulator IC and input power supply and be connected to filter capacitor C2, can obtain stable output voltage more.
In the above embodiments, input voltage is 2.5V～3.5V, and the specification of filter capacitor C1 and filter capacitor C2 all is electrochemical capacitors of 1 μ F, and the specification of adjustable resistance is 2K Ω, the specification of divider resistance is 2.4K Ω, and three-terminal voltage regulator IC adopts LM317 or LM117 chip.
Claims (4)
1. adjustable LED desk lamp comprises lamp socket (1) and is located at lampshade (2) on the lamp socket (1) that it is characterized in that: be provided with the LED (3) that is installed on the lamp socket (1) in lampshade (2), lamp socket (1) is provided with the control circuit that connects LED (3).
2. adjustable LED desk lamp according to claim 1, it is characterized in that: described control circuit comprises the input power supply, the input power supply connects three-terminal voltage regulator IC, adjustable resistance R1 and LED successively, and the input of three-terminal voltage regulator IC and output all are connected with the filter capacitor of 1 μ F.
3. adjustable LED desk lamp according to claim 2 is characterized in that: described three-terminal voltage regulator IC is LM317 three-terminal voltage regulator or LM117 three-terminal voltage regulator.
4. adjustable LED desk lamp according to claim 2 is characterized in that: described input power source voltage is 2.5V～3.5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020284317XU CN201787417U (en) | 2010-08-06 | 2010-08-06 | Adjustable led desk lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020284317XU CN201787417U (en) | 2010-08-06 | 2010-08-06 | Adjustable led desk lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201787417U true CN201787417U (en) | 2011-04-06 |
Family
ID=43819379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020284317XU Expired - Fee Related CN201787417U (en) | 2010-08-06 | 2010-08-06 | Adjustable led desk lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201787417U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330931A (en) * | 2011-07-21 | 2012-01-25 | 苏州晶雷光电照明科技有限公司 | Color-changing LED (light-emitting diode) recessed lamp |
| CN102665329A (en) * | 2011-09-27 | 2012-09-12 | 周胜祥 | Alternating-direct current highly-energy-saving environment-friendly current-regulating brightness-control LED indoor and outdoor illuminating lamp |
| CN104968071A (en) * | 2015-06-01 | 2015-10-07 | 上思县东岽电子科技有限责任公司 | LED street lamp capable of automatic light modulation and electronic heat radiation |
| CN105188187A (en) * | 2015-07-30 | 2015-12-23 | 安徽中杰信息科技有限公司 | Drive circuit of ultraviolet lamp |
-
2010
- 2010-08-06 CN CN201020284317XU patent/CN201787417U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330931A (en) * | 2011-07-21 | 2012-01-25 | 苏州晶雷光电照明科技有限公司 | Color-changing LED (light-emitting diode) recessed lamp |
| CN102665329A (en) * | 2011-09-27 | 2012-09-12 | 周胜祥 | Alternating-direct current highly-energy-saving environment-friendly current-regulating brightness-control LED indoor and outdoor illuminating lamp |
| CN104968071A (en) * | 2015-06-01 | 2015-10-07 | 上思县东岽电子科技有限责任公司 | LED street lamp capable of automatic light modulation and electronic heat radiation |
| CN105188187A (en) * | 2015-07-30 | 2015-12-23 | 安徽中杰信息科技有限公司 | Drive circuit of ultraviolet lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20110806 |