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AssigneePhilips Lighting Holding B.V.
InventorsShitao Deng, Xiaoyan Zhu, Ingrid Emilienne Joanna Rita Heynderickx, Ans Van Den Broek-Cools
Estimating the term…
The invention discloses an outdoor luminaire. The outdoor luminaire comprises a light module comprising at least one LED unit; wherein said light module is configured such that the light emitted by the light module has a first luminous intensity value no less than 10 cd/klm at a first angle (γi), which is a vertical angle of 90 degrees above a direction pointing directly downward from the luminaire. In this way, the luminous intensity of the outdoor luminaire at a vertical angle of 90 degrees is guaranteed to be no less than 10 cd/klm Since the end user sees the light emitted at a vertical angle of 90 degrees no matter how far away he is from the outdoor luminaire, the end user always perceives a certain level of brightness. Such “certain level of brightness” is helpful in increasing the adaptation level of the end user, and can effectively reduce the end user's perception of glare.
An outdoor luminaire comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers: light sources comprising…
Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers: optical arrangements…
Of high-built type, e.g. street light: with lighting device attached sideways of the standard, e.g. for roads and highways
Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00: using crossed laminae or strips , e.g. grid-shaped louvers; using lattices…
About 6 years 5 months of term left · ends 22 Mar 2033 (estimated)
This application is the U.S. National Phase application under 35 U.S.C. §371 of International Application No. PCT/IB2012/057118, filed on Dec. 10, 2012, which claims the benefit of Chinese Patent Application No. PCT/CN2011/084584, filed on Dec. 23, 2011. These applications are hereby incorporated by reference herein.
The present invention relates to lighting, particularly to an outdoor LED luminaire.
For outdoor luminaires, it is important to solve the problem of glare, because glare causes many road safety problems. Currently, the glare effect of outdoor luminaires such as road luminaires is controlled by limiting the luminous intensity in certain directions. For example, the luminous intensity is limited to remain below a certain level at large emission angles, e.g. emission angles larger than 80 degrees. The emission angle is defined as a vertical angle above the direction pointing directly downward from the outdoor luminaire. Hereinafter, a vertical angle above the direction pointing directly downward from the luminaire is also referred to as vertical angle for short.
Other features, purposes and advantages of the present invention will become more apparent from the following detailed description of non-limiting exemplary embodiments taken in conjunction with the accompanying drawings.
FIG. 1 illustrates a diagram for a typical outdoor LED luminaire in accordance with the prior art;
FIG. 2 illustrates a diagram for an outdoor LED luminaire according to an embodiment of the present invention;
Identical or similar reference signs indicate identical or similar devices (modules).
A detailed description of the present invention is given below in connection with the accompanying drawings.
FIG. 2 illustrates a diagram for an outdoor LED luminaire according to an embodiment of the present invention.