The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2025
Filed:
Dec. 12, 2023
Citizen Electronics Co., Ltd., Fujiyoshida, JP;
Citizen Watch Co., Ltd., Nishitokyo, JP;
Kiyokazu Watanabe, Fujiyoshida, JP;
Katsuya Aoshima, Fujiyoshida, JP;
Citizen Electronics Co., Ltd., Fujiyoshida, JP;
Citizen Watch Co., Ltd., Nishitokyo, JP;
Abstract
A light-emitting device includes a dam member disposed around an LED element. The dam member includes a base resin, a first-particle-size filler, and a second-particle-size filler. The dam member contains 10 to 50 wt % of the first-particle-size filler with respect to the base resin. The first-particle-size filler has an average particle size of 1 to 100 μm. The dam member contains 4 to 15 wt % of the second-particle-size filler with respect to the base resin. The second-particle-size filler has an average particle size of 1 to 500 nm. The dam member has a side surface made by dicing.