Semiconductor light-emitting diode chip and light-emitting device with the chip
A technology of light-emitting diodes and light-emitting devices, applied in semiconductor devices, lighting devices, optics, etc., can solve the problems of increasing the thickness of display panels, increasing manufacturing costs, and disadvantages
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Embodiment 1
[0127] Prepare the structure with figure 1 The illustrated semiconductor light emitting device is structurally similar to the semiconductor light emitting device. As a semiconductor LED chip, a semiconductor LED chip having a peak wavelength of 450 nm was prepared, and as a light distribution adjustment layer, a DBR layer (total thickness: about 712 nm) satisfying the conditions of Table 1 below was formed on the surface of the sapphire substrate of the chip. As a wiring board on which a chip is mounted, a package board whose surface is coated with a silver (Ag) film is used.
[0128] [Table 1]
[0129] serial number Material Thickness (nm) 1 TiO 2
Embodiment 2
[0131] A semiconductor light emitting device using a semiconductor LED chip including a light distribution adjusting layer similar to that of Example 1 was manufactured. However, after installing the chip, with Figure 8 The structure shown is similar, with the addition of a laterally reflective portion formed using a resin containing TiO2 white powder.
Embodiment 3 and comparative example 3
[0140] Preparation of LED package FCOM as an actual commercial product TM . In Example 3, a DBR layer (total thickness: about 712 nm) satisfying the conditions of Table 1 was formed on the surface of the sapphire substrate of the chip. In Comparative Example 3, the same product without the light distribution adjusting layer was used.
[0141] The packages of Example 3 and Comparative Example 3 were operated under the same driving conditions (100 mA / 3.27 V), and the color coordinates, beam angles, and amounts of light emitted therefrom were measured. The light distribution of the package is shown in a two-dimensional (2D) graph ( Figure 10A and Figure 10B ) and polar plots ( Figure 11A and Figure 11B ) shown.
[0142] It can be seen that features such as actual color coordinates hardly change, while beam angle and light distribution change significantly. Specifically, the beam angle of Comparative Example 3 is only 140.5° ( Figure 10B and Figure 11B ), and the be...
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Abstract
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