A white light LED and its making method
An LED chip, white light technology, applied in electrical components, circuits, semiconductor devices, etc., can solve the problems of high peak wavelength requirements, low excitation efficiency and high production cost of blue LED chips
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example 1
[0020] Example 1, using a blue LED chip 2 with an excitation wavelength of 460.0-462.5nm, a phosphor 3 composed of glue 31, a yellow phosphor 32 stimulated to produce 555nm, and an orange phosphor 33 excited to produce 590nm, the yellow phosphor 32 occupies The phosphor weight ratio is 6.65%, the orange phosphor 33 accounts for 1.33% of the phosphor 3 weight ratio, and the rest is glue. The above phosphor 3 is stirred evenly, injected into the cavity 1, and then dried to form a white LED. spectrum Figure 5 shown. Its color temperature is about 4800K, display index Ra is greater than 80, and its excitation efficiency is higher than that of yellow phosphor, reaching 49LM / W.
[0021] Compared with the color temperature of the previous blue LED to excite the yellow phosphor is 4800K spectrum Figure 4 As shown, there are only two peaks, one is the blue LED peak; the other is the peak after the yellow phosphor is excited, which is near 555nm, and the peak is high. The color ren...
example 2
[0022] Example 2, using a blue LED chip 2 with an excitation wavelength of 460.0-462.5nm, a phosphor 3 composed of glue 31, a yellow phosphor 32 stimulated to produce 555nm, and an orange phosphor 33 excited to produce 590nm, the yellow phosphor 32 occupies The phosphor weight ratio is 6.55%, the orange phosphor 33 accounts for 2.62% of the phosphor 3 weight ratio, and the rest is colloid. The above phosphor 3 is stirred evenly, injected into the cavity 1, and then dried to form a white LED. spectrum Image 6 shown. Its color temperature is around 3800K, and its excitation efficiency reaches 52LM / W.
example 3
[0023] Example 3, using a blue LED chip 2 with an excitation wavelength of 460.0-462.5nm, a phosphor 3 composed of glue 31, a yellow phosphor powder 32 stimulated to produce 555nm, and an orange phosphor powder 33 excited to produce 590nm, the yellow phosphor powder 32 occupies The phosphor weight ratio is 6.47%, the orange phosphor powder 33 accounts for 3.88% of the phosphor 3 weight ratio, and the rest is glue. The above phosphor 3 is stirred evenly, injected into the cavity 1, and then dried to form a white LED. spectrum Figure 7 shown. Its color temperature is around 3300K, and its excitation efficiency reaches 54LM / W.
[0024] The above tests show that as the weight ratio of the orange phosphor 33 to the phosphor 3 increases, the color temperature of the white LED of the present invention decreases, but the brightness increases. Under the same color temperature, the color rendering index of the white LED of the present invention is higher than that of the previous blu...
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