An optical article for directing and distributing light including an optically transmissive layer having one or more arrays of TIR channels and a light diffusing element disposed in optical communication with the optically transmissive layer. The TIR channels define reflective surfaces extending perpendicular or near-perpendicular to a prevailing plane of the optically transmissive layer. The TIR channels and the light diffusing element operate concurrently to redirect and redistribute a beam of light received from a light source such as daylight or an LED over a broad angular range.

A light-emitting diode (LED) display module including a back panel substantially formed of a material having a thermal expansion that is less than plastic used in injection molding, a housing that frames the back panel comprised of one or more plastic molded parts, and a front face having a louver is disclosed.

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.

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.

Generally, this disclosure enables various technologies for directed illumination. For example, this disclosure enables a sign (e.g., an electronic billboard) having a louver board with a plurality of brims and a plurality of channel groups, where the brims one-to-one shade the channel groups.

Generally, this disclosure enables various technologies for directed illumination. For example, this disclosure enables a sign (e.g., an electronic billboard) having a louver board with a plurality of brims and a plurality of channel groups, where the brims one-to-one shade the channel groups.

The present disclosure is directed to a direct-light generator (10) for sun-sky-imitating illumination devices (100) configured for generating natural light similar to that from the sun and the sky, comprising a first emitting surface (22) and an array of light-emitting devices (21) configured to generate from a primary light a direct light (13) which exits the first emitting surface (22) along a direct light direction (15), wherein the direct light (13) exiting the first emitting surface (22) has a luminance profile (Ldirect(x, y, θ, φ)) which has a narrow peak (14) in the angular distribution around the direct-light direction (15) and is uniform across the first emitting surface (22), wherein each light-emitting device (21) comprises a light emitter (24) having an emitting surface and at least a pair of collimation lenses (25,27) illuminated by the light emitter (24), each pair of collimation lenses (25,27) comprising a pre-collimation lens (27) comprising a light inlet surface (27a) facing the light emitter (24) emitting surface and a light outlet surface (27b), the pre-collimation lens (27) being positioned proximal to the light emitter (24) and a collimation lens (25) comprising a light input surface (25a) and a light output surface (25b), the collimation lens (25) being positioned distal from the light emitter (24), the light emitter (24) and the pre-collimation lens (27) being housed in a hollow housing (26) which is internally coated or made of light absorbing material and has at least an aperture where the collimation lens (25) is positioned, wherein the pre-collimation lens (27) of each pair of collimation lenses (25,27) is configured to emit with a substantially angularly constant intensity and to uniformly illuminate a whole light input surface (25a) of the collimation lens (25) of the pair of collimation lenses (25,27) wherein, with the pre-collimation lens having a pre-collimation lens height (b2), and a base of the input surface (25a) of the collimation lens (25) being spaced apart from a base of the inlet surface (27a) of the pre-collimation lens (27) of a lenses distance (h), the ratio (b2/h) between the pre-collimation lens height (b2) and the lenses distance (h) is comprised in the range of 0.2-0.8, more preferably in the range between 0.25-0.75 and even more preferably in the range be

The present disclosure is directed to a direct-light generator (10) for sun-sky-imitating illumination devices (100) configured for generating natural light similar to that from the sun and the sky, comprising a first emitting surface (22) and an array of light-emitting devices (21) configured to generate from a primary light a direct light (13) which exits the first emitting surface (22) along a direct light direction (15), wherein the direct light (13) exiting the first emitting surface (22) has a luminance profile (Ldirect(x, y, θ, φ)) which has a narrow peak (14) in the angular distribution around the direct-light direction (15) and is uniform across the first emitting surface (22), wherein each light-emitting device (21) comprises a light emitter (24) having an emitting surface and at least a pair of collimation lenses (25,27) illuminated by the light emitter (24), each pair of collimation lenses (25,27) comprising a pre-collimation lens (27) comprising a light inlet surface (27a) facing the light emitter (24) emitting surface and a light outlet surface (27b), the pre-collimation lens (27) being positioned proximal to the light emitter (24) and a collimation lens (25) comprising a light input surface (25a) and a light output surface (25b), the collimation lens (25) being positioned distal from the light emitter (24), the light emitter (24) and the pre-collimation lens (27) being housed in a hollow housing (26) which is internally coated or made of light absorbing material and has at least an aperture where the collimation lens (25) is positioned, wherein the pre-collimation lens (27) of each pair of collimation lenses (25,27) is configured to emit with a substantially angularly constant intensity and to uniformly illuminate a whole light input surface (25a) of the collimation lens (25) of the pair of collimation lenses (25,27) wherein, with the pre-collimation lens having a pre-collimation lens height (b2), and a base of the input surface (25a) of the collimation lens (25) being spaced apart from a base of the inlet surface (27a) of the pre-collimation lens (27) of a lenses distance (h), the ratio (b2/h) between the pre-collimation lens height (b2) and the lenses distance (h) is comprised in the range of 0.2-0.8, more preferably in the range between 0.25-0.75 and even more preferably in the range be

According to at least one aspect, a lighting system is provided. The lighting system comprises a strip lighting device including a circuit board, a light emitting diode (LED) mounted to the circuit board, a lens disposed over the LED and configured to receive the light emitted from the LED and change at least one characteristic of the light received from the LED, and an elastomer encapsulating at least part of the circuit board. The lighting system further comprises a fixture configured to receive the strip lighting device and mount to a structure and a lighting accessory configured to removably couple to the fixture over the strip lighting device and change at least one characteristic of the light from the strip lighting device.

According to at least one aspect, a lighting system is provided. The lighting system comprises a strip lighting device including a circuit board, a light emitting diode (LED) mounted to the circuit board, a lens disposed over the LED and configured to receive the light emitted from the LED and change at least one characteristic of the light received from the LED, and an elastomer encapsulating at least part of the circuit board. The lighting system further comprises a fixture configured to receive the strip lighting device and mount to a structure and a lighting accessory configured to removably couple to the fixture over the strip lighting device and change at least one characteristic of the light from the strip lighting device.