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LED secondary reflection and IGBT (insulated gate bipolar transistor) control drive technology

A technology of secondary reflection and secondary optics, applied in reflectors, energy-saving control technology, medical lighting, etc., can solve the problems of high color rendering index of shadowless lamps, poor color rendering of light sources, good color rendering of light sources, etc. , to achieve the effect of less color distortion, high color rendering index and low temperature

Inactive Publication Date: 2012-09-12
上海航安机场设备有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The color rendering index is high, the color distortion is less, that is, the color rendering of the light source is good; and the lower the color rendering index, the more serious the distortion, that is, the color rendering of the light source is not good
[0006] But the shadowless lamp has high requirements on the color rendering index

Method used

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  • LED secondary reflection and IGBT (insulated gate bipolar transistor) control drive technology
  • LED secondary reflection and IGBT (insulated gate bipolar transistor) control drive technology
  • LED secondary reflection and IGBT (insulated gate bipolar transistor) control drive technology

Examples

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Effect test

Embodiment 1

[0049] The invention relates to an LED secondary reflection and IGBT control drive, which is used for color rendering of shadowless lamps by combining LED color mixing technology or white light technology with secondary optical reflection, wherein,

[0050] The LED color mixing technology is as follows: arrange different numbers of red, green, white, and yellow LEDs in sequence with a microprocessor for real-time adjustment of the proportional relationship, focus through an optical lens, integrate them into nearly parallel spectra, and then pass Secondary optical reflection, color mixing of these four primary colors of LEDs, and finally at a distance of 1 meter from the light emitting surface of the shadowless lamp, a spot with a diameter of 220mm+ / -20mm is formed, and the rated light intensity Ec at the center of the spot is above 140,000lux.

[0051] Such as image 3 IGBT As shown in the driving schematic diagram, IGBT is used to control the drive, and a light sensor is in...

Embodiment 2

[0069] Others are all identical with embodiment 1, just as Figure 7 As shown, in order to remove the aluminum plate under the LED light board, it is directly connected to the heat sink mechanism.

Embodiment 3

[0071] The structure is the same as that of Example 2, the LED is monochromatic white light, and the monochromatic white light LEDs with a color temperature limited to 4000-4500K are arranged in sequence, focused by an optical lens, integrated into a nearly parallel spectrum, and then through secondary optical reflection, Finally, at a distance of 1 meter from the light emitting surface of the shadowless lamp, a spot with a diameter of 220mm+ / -20mm is formed, the rated light intensity Ec at the center of the spot is not less than 140,000lux, and the color rendering index of the light output is not less than 92%.

[0072] If it is a white LED, there is no need to adjust the color temperature, but the color temperature of the white LED used must be limited between (4000-4500K). Therefore, the price is cheaper than that of Embodiment 1 and Embodiment 2, and is applicable to hospitals with poor basic equipment and insufficient funds.

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Abstract

The invention relates to LED secondary reflection and IGBT (insulated gate bipolar transistor) control drive technology. LED color mixing technology or white light technology and secondary optical reflection are combined to be used for color development of a shadowless lamp, wherein the LED color mixing technology includes that red LEDs, green LEDs, white LEDs and yellow LEDs are orderly arrayed, the quantity of the red LEDs, the quantity of the green LEDs, the quantity of the white LEDs and the quantity of the white LEDs are different, the proportional relation of the red LEDs, the green LEDs, the white LEDs and the yellow LEDs are instantly adjusted by a microprocessor, an approximately spectrum is integrated by the aid of focusing of optical lenses, colors of the LEDs with the primary colors are mixed via secondary optical reflection, IGBT control drive is adopted, a sensor is mounted in a light emergent direction, and LED current is controlled by a feedback circuit; and alternately, the white light technology includes that monochromatic white light LEDs are orderly arrayed, the color temperature of each monochromatic white light LED is limited within the range from 4000K to 45000K, and an approximately parallel spectrum is integrated by the aid of focusing of optical lenses and then is in secondary optical reflection. The LED secondary reflection and IGBT control drive technology has the advantages of high color developing index, low color distortion, zero pollution, low temperature and power consumption and long service life.

Description

technical field [0001] The invention relates to LED secondary reflection and IGBT control drive, which is used in medical shadowless lamps and used as lighting in operations. LEDs are used as light sources, and the required color temperature and color rendering index can be obtained through white light technology or color mixing technology to meet the use requirements. . Background technique [0002] Surgical shadowless lamps are routine and necessary equipment in hospital operating rooms, and the use of surgical shadowless lamps is a necessary working condition and prerequisite for many surgical and medical operations. At present, the shadowless lamp used in the operating room of the hospital is composed of a halogen bulb to form a whole lamp head. It has many shortcomings in design and application, such as high temperature, uneven brightness at the center spot, high power, large color difference, no technical requirements for color fidelity, small range of motion, and is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/00F21V7/10H05B37/02F21W131/205F21Y101/02F21Y115/10
CPCY02B20/40
Inventor 吴光烈沈家钦
Owner 上海航安机场设备有限公司
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