Led desk lamps are generally used in office or learning places such as reading, writing, design, and review. For those who work on the desktop, ensuring a good visual environment in the work area is of great benefit to improving the quality of study and office work, improving work efficiency, and protecting health.

In line with the concept of energy saving

We know that the shortage of electricity supply will inevitably lead to an increase in electricity prices and the hot sale of energy-saving electrical products. One of the most important features of LED environmentally friendly and energy-saving desk lamps, one that has contributed to the hot sale is its low power consumption and power saving performance.

Different structures of LED lighting desk lamps

LED environmental protection and energy-saving desk lamps are used for local lighting such as reading and writing. The required illuminance and uniformity of illuminance are relatively high. It is necessary to connect many light-emitting diodes in series or a combination of series and parallel, which involves the distribution of light sources. According to the characteristics of LED luminous intensity, luminous angle and small size, multiple LEDs can be integrated on a proper circuit board according to a certain array, and then installed in the corresponding modeling structure. From the surface, the entire plane forms one The light-emitting surface, so such a flat-panel structure with LEDs is called an LED light-emitting panel.

LED is a low-voltage DC device with a typical forward voltage of 3.0V～4.0V and a drive current of 20mA. As a current type device, LED can be known according to the volt-ampere characteristics of LED. In order to make the LED work normally in a stable and reliable state, a constant current must be provided for the LED.

The biggest difference between the structure of the LED desk lamp and the traditional desk lamp is the light redistribution component. Traditional lighting sources are incandescent lamps or fluorescent lamps, etc., whose luminous characteristic is that light radiation occupies almost the entire space. Therefore, a reflector is required to collect light in other directions and project it to the required area. Usually, a parabolic reflector is used to form an approximately parallel beam. However, LED desk lamps often have several to dozens of LEDs distributed in them according to the luminous intensity of the LEDs. Since the light emitted by the LED is concentrated in a small solid angle range, it can already meet the needs of local lighting in some places, but if a larger illumination range is required, the light generated by these LEDs must pass through a system lens , And produce the light distribution we require.