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| [5050LED] The implementation method and advantages and disadvantages of the whit |
| Time:2022-10-09 00:00:00 | view： |
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At present, there are three main methods for achieving white light for 5050LED lamp beads: 1. Three -base color multi -chipset and glowing white light through LED lamp beads red and green blue. Advantages: high efficiency, controllable color temperature, good color rendering. Disadvantages: Different color decay of three -basal color leads to unstable color temperature, complicated control circuits, and higher costs.2. Blu -ray LED lamp bead chip stimulates yellow fluorescent powder. The yellow and green light from the LED blue light and fluorescent powder synthesize white light. In order to improve the color rendering performance, you can add a small amount of red fluorescent powder or add an appropriate amount of green, red fluorescent powder at the same time. Essence Advantages: High efficiency, simple preparation, good temperature stability, and good coloring. Disadvantages: Poor nature and change with the angle of color temperature. 3. UV light LED chip stimulates fluorescent powder to emit three -based color synthesis white light. Advantages: good coloring and simple preparation. Disadvantages: At present, the 5050LED chip is relatively low efficiency, with the problem of ultraviolet light leakage, and the problem of fluorescent powder temperature stability needs to be resolved. Uvled+RGB three -color fluorescence scheme Features Advantages: 1) The white coordinate point is only determined by the fluorescent powder itself, which has nothing to do with the inspiration chip (which can tolerate the discreteness of LED chips). 2) It can achieve extremely high color restore index RI. 3) Theoretically is the simplest manufacturing solution. 4) The stability of the color light only depends on the fluorescent powder, which can be stable. 1) The leaky ultraviolet light will destroy the LED glue, causing the life of the device. 2) Light conversion efficiency is not high, self -absorption, light transmission, etc.5050LED lamp bead white light 5050LED lamp beads RGB Challenge: 1) So far, there is no successful test. 2) fluorescence powder that can stimulate blue light yet. 3) The color will change with the angle of observation. 4) The seal must be able to resist ultraviolet destruction. 5) The stability of RGB fluorescent powder needs to be further improved. 5050LED (Blue)+fluorescent powder (YELLOW) scheme characteristics Advantages: 1) There is only a single fluorescent powder, which is relatively simple. 2) The fluorescent powder with blue light is mature and abundant. 3) The color reducing color of the white light is moderate (RI? 75%). 4) The stability of fluorescent powder can meet the requirements of color reduction. 1) The light conversion efficiency is not high, self -absorption, light transmission, etc. 2) The degree of color reduction is not high enough. 3) The stability of the color is greatly affected by temperature and driving current. 4) The color will change with the perspective of observation.5050RGB Triangular color LED mixed color scheme Advantages: 1) The highest photoelectric efficiency is the highest. From the perspective of long -term development, this plan will be the mainstream plan. 2) Random color adjustment can be achieved. 3) Excellent color rendering (RI). 4) Very wide color gamut range. 1) Require complex color light feedback control, compensation for the characteristics of the LED5050 material characteristics changes with temperature changes, and the light decay characteristics of LED. 2) The adjustment of the color is very strange. to achieve the implementation method of 5050LED lamp bead white light. |
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