CN205331923U - LED (Light emitting diode) desk lamp - Google Patents

Abstract

The utility model relates to a LED (Light emitting diode) desk lamp, including curved lens and LED light source, the LED light source install on curved lens, curved lens's back central point put set up fluted for installation LED light source, the LED light source connect by LED drive module drive, LED drive module's input is connected with the DC output of ACDC module is electrodeless, the AC input of ACDC module connects alternating current power supply, LED drive module include LED driver chip and bridge type rectifier circuit, bridge type rectifier circuit become by four graetz connection's diode cluster. LED (Light emitting diode) desk lamp carry out LED drive module electrodeless the connection with the ACDC module, guarantee circuit module's commonality to improve the convenience of maintenance and installation, it must be corresponding totally to solve the present positive negative pole of LED (Light emitting diode) desk lamp circuit module, installation, the inconvenient problem of maintenance.

Description

A kind of LED desk lamp

Technical field

This utility model relates to desk lamp technical field, specifically a kind of LED desk lamp。

Background technology

LED is environmental protection light source, has that voltage is low, life-span length, responds fast and energy-efficient feature, only needs 3-5 watt of power just can meet desk lamp lighting requirement, be the good light source making desk lamp。

At present, the circuit module of LED desk lamp is all directly driven LED light source by a driving chip, and in installation process, it is necessary to assure the both positive and negative polarity of power supply is connected correctly with the both positive and negative polarity of circuit module, this causes certain inconvenience to installing。

Utility model content

The purpose of this utility model is to provide a kind of LED desk lamp, LED drive module is carried out electrodeless connection with AC/DC module by described LED desk lamp, ensure the versatility of circuit module, improve maintenance and the convenience installed, must be completely corresponding for solving existing LED desk lamp circuit module both positive and negative polarity, the problem of installation, maintenance inconvenience。

For achieving the above object, scheme of the present utility model is: a kind of LED desk lamp, described LED desk lamp includes toroidal lens and LED light source, described toroidal lens is arranged on the shell of LED desk lamp lamp body, described LED light source is arranged on toroidal lens, the center, the back side of described toroidal lens offers groove, for installing LED light source, described LED light source is driven by LED drive module and connects, the input of described LED drive module is electrodeless with the DC output end of AC/DC module to be connected, the ac input end of described AC/DC module connects alternating current power supply, described LED drive module includes LED drive chip and bridge rectifier, the diode that described bridge rectifier is connected by four bridge-types forms。

Further, according to LED desk lamp described in the utility model, described LED light source is made up of LED chip and metal fin, and described LED chip is arranged on metal diffusion sheet。

Further, according to LED desk lamp described in the utility model, described toroidal lens is provided with installation limit, and described toroidal lens is fixed on the shell of LED desk lamp lamp body by installing limit。

Further, according to LED desk lamp described in the utility model, described toroidal lens adopts glass material。

Further, according to LED desk lamp described in the utility model, the lateral surface of described toroidal lens scribbles anti-reflection film。

Further, according to LED desk lamp described in the utility model, the base of described LED desk lamp being embedded with PCB, described PCB is provided with USB interface, described USB interface connects USB fan。

Further, according to LED desk lamp described in the utility model, the base of described LED desk lamp is embedded with intervalometer。

The beneficial effect that this utility model reaches: LED drive module is carried out electrodeless connection with AC/DC module by described LED desk lamp, it is ensured that the versatility of circuit module, improves maintenance and the convenience installed。

This utility model is lowered the temperature by arranging USB fan, saves the energy, meanwhile, this utility model by arranging intervalometer, make consumer can timing working, when timing arrives, just there is sound, remind consumer to have a rest。

Accompanying drawing explanation

Fig. 1 is the circuit module schematic diagram of this utility model LED desk lamp。

Detailed description of the invention

Below in conjunction with accompanying drawing and specific embodiment, this utility model is described in further detail。

LED desk lamp of the present utility model includes toroidal lens and LED light source, described toroidal lens is arranged on the shell of LED desk lamp lamp body, described LED light source is arranged on toroidal lens, and the center, the back side of described toroidal lens offers groove, is used for installing LED light source。

As shown in Figure 1, described LED light source is driven by LED drive module and connects, the input of described LED drive module is electrodeless with the DC output end of AC/DC module to be connected, the ac input end of described AC/DC module connects alternating current power supply, described LED drive module includes LED drive chip and bridge rectifier, and diode D1, D2, D3, D4 that described bridge rectifier is connected by four bridge-types form。

At the positive half cycle of alternating voltage, D1, D3 turn on, and D2, D4 end, and electric current is returned to AC/DC lower end by AC/DC upper end through D1 → LED driving → D3, obtain a half wave rectified voltage on LED drives；At the negative half period of alternating voltage, D1, D3 end, and D2, D4 turn on, and electric current is returned to AC/DC upper end by the lower end of AC/DC through D2 → LED driving → D4, obtain another half wave rectified voltage on LED drives。So, no matter how both positive and negative polarity connects, and does not affect LED drive module and obtains electric, it is achieved AC/DC module is connected with the electrodeless of LED drive module。

The present embodiment is embedded with PCB on the base of LED desk lamp, and described PCB is provided with USB interface, and described USB interface connects USB fan, is lowered the temperature by USB fan, saves the energy。

Toroidal lens described in the utility model is ellipsoid shape, and cross section is kidney-shaped, described toroidal lens includes plane of refraction and light distribution curved surface, described plane of refraction is as a whole with light distribution curved surface combination, and plane of refraction is positioned at the back side of toroidal lens, light distribution curved surface is positioned at the front of toroidal lens, and the middle part of described plane of refraction arranges the refraction hemisphere face caved inward, and described LED light source is arranged on the hemispherical sphere center position of refraction。

Refraction hemisphere face is the hemisphere face of spill, is positioned at lens centre, reflects the hemispherical centre of sphere and overlap with plane of refraction, and LED light source is placed on the centre of sphere, it may ensure that the light of LED emission enters lens and reduces reflection loss。Light distribution curved surface adopts glass material, utilizes the refraction principle of glass, designs free form surface according to lighting requirement, and the utilization rate that its feature is light is high, dazzle is completely eliminated, reaches the purpose of eye protection。

The present embodiment is also provided with installing limit, and described limit of installing is arranged at the periphery of plane of refraction, utilizes installation limit to be fixed on by toroidal lens on the shell of desk lamp lamp body, can adjust the relative position of LED light source and lens simultaneously。

The needs of demoulding when producing in a large number for guarantee toroidal lens, the toroidal lens of the present embodiment is also provided with technique curved surface。And the LED light source adopted is made up of LED chip and metal fin, described LED chip is arranged on metal diffusion sheet。

LED drive module is carried out electrodeless connection with AC/DC module by this utility model, it is ensured that the versatility of circuit module, improves maintenance and the convenience installed。And the LED desk lamp maintaining uniform illumination adopting the toroidal lens of this utility model structure to design, completely eliminates dazzle, and eye also without dazzle, makes human eye be protected below desk lamp。It addition, this utility model by installing USB fan on Desk lamp feet, by fan for cooling, save the energy。

Claims (7)

1. a LED desk lamp, described LED desk lamp includes toroidal lens and LED light source, described toroidal lens is arranged on the shell of LED desk lamp lamp body, described LED light source is arranged on toroidal lens, it is characterized in that: the center, the back side of described toroidal lens offers groove, for installing LED light source, described LED light source is driven by LED drive module and connects, the input of described LED drive module is electrodeless with the DC output end of AC/DC module to be connected, the ac input end of described AC/DC module connects alternating current power supply, described LED drive module includes LED drive chip and bridge rectifier, the diode that described bridge rectifier is connected by four bridge-types forms。

2. LED desk lamp according to claim 1, it is characterised in that described LED light source is made up of LED chip and metal fin, described LED chip is arranged on metal diffusion sheet。

3. LED desk lamp according to claim 1, it is characterised in that described toroidal lens is provided with installation limit, described toroidal lens is fixed on the shell of LED desk lamp lamp body by installing limit。

4. LED desk lamp according to claim 1, it is characterised in that described toroidal lens adopts glass material。

5. LED desk lamp according to claim 1, it is characterised in that the lateral surface of described toroidal lens scribbles anti-reflection film。

6. LED desk lamp according to claim 1, it is characterised in that be embedded with PCB on the base of described LED desk lamp, described PCB is provided with USB interface, and described USB interface connects USB fan。

7. LED desk lamp according to claim 1, it is characterised in that be embedded with intervalometer on the base of described LED desk lamp。