EP 3312502 A1 20180425 - REFLECTOR FOR LIGHTING SOURCE AND LIGHTING DEVICE COMPRISING THE SAME

Title (en)

REFLECTOR FOR LIGHTING SOURCE AND LIGHTING DEVICE COMPRISING THE SAME

Title (de)

REFLEKTOR FÜR BELEUCHTUNGSQUELLE UND BELEUCHTUNGSVORRICHTUNG DAMIT

Title (fr)

RÉFLECTEUR POUR LA SOURCE LUMINEUSE ET DISPOSITIF D'ÉCLAIRAGE LE COMPRENANT

Publication

EP 3312502 A1 20180425 (EN)

Application

EP 17275096 A 20170703

Priority

CN 201610906236 A 20161018

Abstract (en)

The present invention provides a reflector (100, 400) intended for lighting source comprising a reflector body (110) having reflective side walls (130A, 130B, 130C, 130D, 430A, 430B, 430C, 430D), a top opening (120, 420) and a bottom opening (140, 440). An inner surface of the side wall (130A, 130B, 130C, 130D, 430A, 430B, 430C, 430D) is configured to be a light-reflective parabolic surface (432), a parabola of the light-reflective parabolic surface (432) having two end points and a parabola vertex, the parabola vertex being closer to the top opening (120, 420) with respect to the bottom opening (140, 440), a height between a connection line connecting the two end points of the parabola and the parabola vertex being a height H of the parabola. A ratio h/L of a height h of the side walls (130A, 130B, 130C, 130D, 430A, 430B, 430C, 430D) to a length L of the bottom opening (140, 440) is between 0.4 and 0.7, a ratio h/H of the height h of the side walls (130A, 130B, 130C, 130D, 430A, 430B, 430C, 430D) to the height H of the parabola is between 0.55 and 0.75, and a ratio h/ l of the height h of the side walls (130A, 130B, 130C, 130D, 430A, 430B, 430C, 430D) to a length l of the top opening (120, 420) is between 0.3 and 0.55. The present invention also provides a lighting device (500) comprising the above reflector (100, 400), which is able to reduce the Unified Glaring Rating (UGR) while maintaining high luminous efficiency.

IPC 8 full level

F21V 7/00 (2006.01); F21V 7/06 (2006.01)

CPC (source: CN EP)

F21V 7/0083 (2013.01 - EP); F21V 7/06 (2013.01 - EP); F21V 7/09 (2013.01 - EP); F21V 7/22 (2013.01 - CN); F21V 17/14 (2013.01 - CN); F21V 19/002 (2013.01 - CN); F21V 29/503 (2015.01 - CN); F21Y 2103/00 (2013.01 - EP); F21Y 2115/10 (2016.07 - EP)

Citation (applicant)

CN 201280040123 A 20120726
CN 201110299984 A 20110929

Citation (search report)

[XI] US 2009231856 A1 20090917 - HOUSEHOLDER JOHN R [US], et al
[IY] JP 2011129405 A 20110630 - MITSUBISHI ELECTRIC CORP, et al
[YA] DE 202011107052 U1 20120102 - SONG HAO [CN]
[I] AU 496079 B2 19760930
[A] EP 2312201 A2 20110420 - ERCO GMBH [DE]
[I] US 8845129 B1 20140930 - HOLDER RONALD G [US], et al
[I] EP 2354642 A2 20110810 - PANASONIC ELEC WORKS CO LTD [JP]
[I] DE 102009047493 A1 20110609 - OSRAM GMBH [DE]
[IY] DE 102011004683 A1 20120830 - OKTALITE LICHTTECHNIK GMBH [DE]
[YA] EP 2713094 A1 20140402 - TOSHIBA LIGHTING & TECHNOLOGY [JP]

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3312502 A1 20180425; EP 3312502 B1 20201111; CN 107965680 A 20180427

DOCDB simple family (application)

EP 17275096 A 20170703; CN 201610906236 A 20161018