Light emitting device
A technology of light-emitting devices and light-emitting diodes, which is applied in the direction of electric solid-state devices, semiconductor devices, electrical components, etc., to achieve the effect of improving long-term reliability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
no. 1 approach
[0032] Fig. 1A is a longitudinal cross-sectional view showing a surface-mounted light-emitting device in a first preferred embodiment of the present invention, Fig. 1B is a longitudinal cross-sectional view showing a light-emitting element, and Fig. 1C is an enlarged cross-sectional view showing a light emitting device in Fig. 1A lead part.
[0033] The light-emitting device 1 includes an LED element 2 formed by crystal growth of a GaN-based semiconductor layer on a sapphire substrate, a housing portion 3 formed of light-reflective white resin or ceramics, and an opening portion of the housing portion 3 in which the LED element 2 is placed is sealed. The resin sealing part 4 of the housing part 3 feeds electric power to the lead part 5 of the LED element 2 placed in the housing part 3, and the lead part 5 includes a silver plating layer formed on its surface as a reflective layer and on the surface of the reflective layer An organic thin film 50 formed of an organic compound a...
no. 2 approach
[0047] Fig. 2 is a longitudinal cross-sectional view showing a surface mount type light emitting device in a second preferred embodiment of the present invention.
[0048] The light-emitting device 1 of the second preferred embodiment differs from the device of the first preferred embodiment in that the device 1 comprises a reflective surface 30 inclined to the inside of the housing part 3, so that by reflecting light emitted from the LED element 2 and based on the angle of inclination The direction of the light entering the reflective surface 30 improves the output efficiency.
[0049] In addition, a light reflective film including a light reflective material such as aluminum (Al) may be formed on the light reflective surface 30 .
[0050] Advantages of the second embodiment
[0051] According to the second preferred embodiment of the present invention as described above, in addition to the advantageous advantages of the first preferred embodiment, the blue light emitted fro...
no. 3 approach
[0053] Fig. 3 is a longitudinal cross-sectional view showing a bullet-shaped light emitting device in a third preferred embodiment of the present invention.
[0054] The light emitting device 1 in the third preferred embodiment comprises lead parts 5A, 5B comprising a copper alloy excellent in thermal conductivity, the blue-emitting LED element 2 fixed to the cup-shaped part 56 formed on the lead part 5B by an embossing method, electrically connected The lead wires 6 of the electrode and lead parts 5A, 5B of the LED element 2 include a coating resin 560 containing siloxane of a phosphor 561 to emit yellow light when excited by blue light, and the coating resin 560 is sealed therein. The cup-shaped portion 56 of the LED element, and the resin sealing portion 4 comprising transparent and colorless epoxy resin, which integrally seal the lead portions 5A, 5B and the wire 6 .
[0055] The cup portion 56 includes a side wall portion 57 formed obliquely so as to reflect blue light em...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More