Cold cathode desk lamp

Abstract

The invention relates to a cold cathode desk lamp which comprises a lamp cap, a lamp holder, a switch and a power line, wherein a rotating device is arranged on the lamp holder; the lamp cap is connected with the lamp holder through the rotating device; a light source fixing plate is arranged in the lamp cap; a cold cathode lamp and an inverter are fixed on the light source fixing plate; a reflective material is arranged on the light source fixing plate; the caliber of the cold cathode lamp is 2.4mm-8.0mm, and the cold cathode lamp is an M-shaped lamp, a U-shaped lamp, an MU-shaped lamp or a straight lamp; an intelligent IC half-bridge driven control chip is adopted by the inverter; and a touch switch is adopted. The cold cathode desk lamp of the invention has stable light rays, frequent switching resistance and good color rendering, does not have stroboscopic and flickering phenomena, can effectively protect the vision and effectively improve the lighting effect, has long service life, and is favorable for environmental protection.

Description

technical field [0001] The invention relates to a civil lighting fixture, in particular to a cold cathode desk lamp. Background technique [0002] The tubes used in traditional desk lamps are mainly compact fluorescent tubes, which use tungsten wires as electrodes, which have the following disadvantages: [0003] 1. When starting, the filament needs to be preheated to start, and the starting speed is slow and there are stroboscopic flashes; [0004] 2. During the working process, the tungsten wire is always in a high temperature state, which is prone to volatilization and loss, and blackheads appear in the lamp tube; if it is switched frequently, the [0005] It will accelerate the loss of the lamp tube and seriously shorten the service life of the lamp tube; [0006] 3. The diameter of the lamp tube is relatively large. T5 / T4 lamp tubes are generally used, and the powder coating area is large. In addition, due to cost considerations, the tube wall is mostly coated with lo...

AI Technical Summary

Problems solved by technology

[0003] 1. When starting, the filament needs to be preheated to start, and the starting speed is slow and there are stroboscopic flashes;

[0004] 2. During the working process, the tungsten wire is always in a high temperature state, which is prone to volatilization and loss, and blackheads appear in the lamp tube; if it is switched frequently, the

[0005] It will accelerate the loss of the lamp tube and seriously shorten the service life of the lamp tube;

[0006] 3. The diameter of the lamp tube is relatively large. Generally, T5 / T4 lamp tubes are used, and the powder coating area is large. Moreover, due to cost considerations, most of the lamp tube walls are coated with low-cost halogen phosphors, and the light decays quickly.

After 2000 hours of lighting, the brightness decreases significantly, and the luminous efficiency is low, generally only reaching 45lm / W, and the color rendering is poor, and the color rendering index cannot reach the nominal 80Ra;

[0007] 4. The mercury (mercury) content in the lamp tube is relatively high, reaching about 10mg, causing pollution to the environment;

[0008] 5. Can not have dimming function

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