Application of LED light source in film and television industry and stage lighting

First. Overview of LED light sources

LED (Light Emitting Diode) is a solid-state semiconductor device that can directly convert electricity into light. The heart of the LED is a semiconductor chip. One end of the chip is attached to a bracket, one end is the negative electrode, and the other end is connected to the positive electrode of the power supply. The entire chip is encapsulated by epoxy resin.

It is a new generation of solid cold light source with the advantages of high light efficiency, low power consumption, long life, easy control, maintenance-free, safety and environmental protection. , more power saving, higher brightness, farther light projection and better light projection performance than tube-shaped energy-saving lamps.

Second, LED light source characteristics and advantages

1. High efficiency and energy saving: only a few kWh of electricity per 1,000 hours (ordinary 60W incandescent lamps consume 1 kWh of electricity for 17 hours, and ordinary 10W energy-saving lamps consume 1 kWh of electricity for 100 hours).

2. Super long life: semiconductor chips emit light, no filament, no glass bubbles, not afraid of vibration, not easy to break, and the service life can reach 50,000 hours (the service life of ordinary incandescent lamps is only 1,000 hours, and the service life of ordinary energy-saving lamps is only 8 in hours.).

3. It can work at high speed. If the energy-saving lamp is frequently started or turned off, the filament will quickly turn black and break down.

4. Solid state package: It belongs to the type of cold light source. Therefore, it is very convenient to transport and install, and can be installed in any miniature and closed equipment. It is not afraid of vibration and basically does not need to consider heat dissipation.

5. LED technology is progressing with each passing day, its luminous efficiency is making an amazing breakthrough, and the price is constantly decreasing.

6. It is beneficial to human health: the light does not contain ultraviolet rays and infrared rays, and does not produce radiation (the ordinary light rays contain ultraviolet rays and infrared rays).

7. Green and environmental protection: It does not contain harmful elements such as mercury and xenon, which is conducive to recycling and disassembly, and will not generate electromagnetic interference (common lamps contain elements such as mercury and lead, and the electronic ballast in energy-saving lamps will generate electromagnetic interference. ).

8. The light distribution technology expands the LED point light source into a surface light source, increases the luminous surface, eliminates glare, sublimates visual effects, and eliminates visual fatigue.

9. Integrated design of lens and lampshade: The lens has the functions of focusing and protection at the same time, which avoids the repeated waste of light, and makes the product more concise and beautiful.

10. The high-power LED flat cluster package and the integrated design of the radiator and the lamp holder fully guarantee the heat dissipation requirements and service life of the LED, and fundamentally satisfy the arbitrary design of the structure and shape of the LED lamp, which has the distinctive characteristics of the LED lamp. .

11. Protection of eyesight: DC drive, no stroboscopic (ordinary lights are AC-driven, it will inevitably produce stroboscopic).

12. High light efficiency: low heat generation, 90% of the electric energy is converted into visible light (80% of the electric energy of ordinary incandescent lamps is converted into heat energy, and only 20% of the electric energy is converted into light energy).

13. Impact resistance, strong lightning resistance: no filament and glass shell, no traditional lamp fragmentation problem, no harm to human body.

14. High safety factor: The required voltage and current are small, the heat generation is small, and there is no potential safety hazard. It is suitable for high-risk places such as mines.

15. Strong environmental adaptability and great market potential: low-voltage, DC power supply, battery, solar power supply, suitable for remote mountainous areas and outdoor lighting and other places lacking electricity and low electricity.

16. It is safe and reliable to work under low thermal voltage: the surface temperature is less than or equal to 60°C (when the ambient temperature is Ta=25°C).

17. Wide voltage range, universal use: 85V ~ 264VAC full voltage range constant current, to ensure that life and brightness are not affected by voltage fluctuations.

18. Using PWM (pulse width modulation) constant current technology, high efficiency, low heat and high constant current precision.

19. Reduce line loss, no pollution to power grid: power factor ≥ 0.9, harmonic distortion ≤ 20%, EMI conforms to global indicators, reduces power loss of power supply lines and avoids high-frequency interference pollution to power grid.

20. Universal standard lamp holder, which can directly replace the existing halogen lamps, incandescent lamps and fluorescent lamps.

21. The luminous efficiency can be as high as 80lm/W, a variety of color temperatures can be selected, the color rendering index is high, and the color rendering is good.

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