Invention Grant
- Patent Title: Lighting device with omnidirectional light distribution
- Patent Title (中): 照明装置全方位配光
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Application No.: US14352034Application Date: 2012-10-19
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Publication No.: US08946978B2Publication Date: 2015-02-03
- Inventor: Johannes Petrus Maria Ansems , Joris Hubertus Antonius Hagelaar , Peter Johannes Martinus Bukkems , Vincent Stefan David Gielen , Reinier Imre Anton Den Boer , Shi Bei He
- Applicant: Koninklijke Philips N.V.
- Applicant Address: NL Eindhoven
- Assignee: Koninklijke Philips N.V.
- Current Assignee: Koninklijke Philips N.V.
- Current Assignee Address: NL Eindhoven
- Agent Yuliya Mathis
- International Application: PCT/CN2012/001405 WO 20121019
- International Announcement: WO2013/056516 WO 20130425
- Main IPC: H01J5/00
- IPC: H01J5/00 ; F21V5/00 ; F21V3/04 ; F21K99/00 ; F21V3/00
Abstract:
A lighting device (2) comprises a light source (210) having a main forward emission direction (20), and an envelope (220) in which the light source (210) is arranged. The envelope (220) comprises an upper portion (225) having scattering properties and being arranged to reflect a part of the light from the light source (210) laterally and backwardly relative to the main forward emission direction (20) and transmit a part of the light from the light source (210). The light intensity distribution of the lighting device (2) is more uniform, as backward and lateral light intensity is increased while the light in the main forward emission direction (20) is still admitted.
Public/Granted literature
- US20140252942A1 Lighting device with omnidirectional light distribution Public/Granted day:2014-09-11
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