High luminous-efficacy linear lighting device

Abstract

A high luminous-efficacy linear lighting device includes a tubular light cover, a support plate and a light source board. The tubular light cover has a light-emitting portion and a light-shielding portion. The light-emitting surface of the light-emitting portion is a curved surface. The bottom of the light-emitting portion has a lower opening. The top of the light-shielding portion has an upper opening. The bottom of the light-emitting portion is connected to the top of the light-shielding portion. The width of the bottom of the light-emitting portion is greater than the width of the top of the light-shielding portion. The support plate is disposed within the light-shielding portion and adjacent to the upper opening. The light source board is disposed on one side of the support plate and faces the light-emitting portion.

Dependencies are inferred from the claim text.