摘要:
Controlling an arrangement of semiconductors of which different semiconductors emit light of different distinct colors is disclosed, whereby a feed forward control part, which is dependent on a junction temperature of semiconductors for each color, is operated with first intervals and is adjusted dependent on measure light output for each color with much longer second intervals.
摘要:
A luminaire arrangement for providing a luminous flux in a target direction (z) comprising a light guide (101), multiple light sources (103) arranged at said light guide for emitting light into said light guide, out coupling means (106) arranged at said light guide and adapted to direct light out from said light guide; and a cover layer (102) arranged in front of said light guide at the side where light it to be directed out, said cover layer being provided with at least one optically transparent area (104) such that light directed out from said light guide is allowed to pass said cover layer. The cover layer allows for use of the same or similar light guide, light sources and out coupling means in a number of different luminaire applications, where each application may have different requirements on e.g. appearance, and/or collimation and/or directivity of the luminous flux.
摘要:
The present invention relates to a light emitting diode (LED) module (10) comprising a substrate (12) having plural indents (14) and flattish portions (20) in between the indents, and LEDs (16) mounted in the indents. The LED module is characterized by at least one of sensors (22) and additional LEDs (32) provided at the flattish portions. This allows increased sensor detection accuracy and/or color compensation.The present invention also relates to a method for the manufacturing of such an LED module.
摘要:
A method, for controlling color output of a variable color lighting system (1) capable of emitting light within a color gamut, comprising the steps of receiving (10) a request for a target color (T), converting the target color (T) to a set of lighting system control parameters, and applying (15) the set of lighting system control parameters, thereby controlling the color output of the lighting system (1). The step of converting comprises the steps of determining (11) a target set (DT) of lighting system control parameters corresponding to the target color (T), evaluating (12) the target set (Dτ) of lighting system control parameters with respect to a range of allowable control parameters, thereby determining whether the target color (T) is outside the color gamut, and, when the target color (T) is outside the color gamut, determining (14) an approximation set (DA) of control parameters, the approximation set corresponding to an output color (A1; A2) within the color gamut, the output color (A1; A2) being an approximation of the target color (T).
摘要翻译:一种用于控制能够在色域内发光的可变彩色照明系统(1)的颜色输出的方法,包括以下步骤:接收(10)对目标色彩(T)的请求,转换目标色彩(T) 一组照明系统控制参数,并应用(15)该组照明系统控制参数,从而控制照明系统(1)的颜色输出。 转换步骤包括以下步骤:确定(11)对应于目标颜色(T)的照明系统控制参数的目标集(DT),评估(12)照明系统控制参数的目标集合(Dtau)相对于 允许的控制参数的范围,从而确定目标色(T)是否在色域之外,并且当目标色(T)在色域之外时,确定(14)控制参数的近似集(DA) ,对应于色域内的输出颜色(A 1; A 2)的近似集,输出颜色(A 1; A 2)是目标颜色(T)的近似值。
摘要:
The present invention relates to a control system (10; 30; 50) for a LED luminary (12) including a plurality of LED light sources of multiple colors for producing a mixed color light. The control system comprises means (22) for controlling the LED light sources in accordance with a difference between set point values representing a desired light output and first control data provided by at least one optical sensor (14; 32) responsive to a property of the light produced by the LED light sources. The control system is characterized by means (26; 38) for compensating said set point values in accordance with second control data provided by a temperature sensor (24) responsive to the temperature of the optical sensor(s) (14; 32). The additional temperature sensor makes it possible to compensate for changes in the spectral sensitivity of the optical sensor(s), whereby the color stability of the LED luminary with integrated optical sensors can be increased. The invention also relates to a corresponding control method.
摘要:
A lighting assembly (100) configured to be mechanically and electrically connected to a socket (150), the lighting assembly comprising a lighting module (102) comprising a light source (106), electrical contacting means (108) electrically connected to the light source and a heat spreader (110) in thermal contact with the light source; and a connector (104) being rotatable in relation to the lighting module (102). The connector comprises connector locking means (119) for locking the lighting assembly to a socket through interaction with receiving locking means comprised in the socket when the lighting module is axially inserted into the socket and the connector is rotated relative to the lighting module and the socket, thereby bringing the electrical contacting means (108) into contact with corresponding receiving contacting means (122) comprised in the socket. Hereby, the space required for electrical contacting means in the lighting assembly and in the socket may be reduced as no space is reserved in the socket for rotation of the electrical connecting means.
摘要:
A method is disclosed of controlling a LED, comprising driving the LED with a DC current for a first time, interrupting the DC current for a second time such that the first time and the second time sum to a period, determining at least one characteristic of the LED while the DC current is interrupted, and controlling the DC current during a subsequent period in dependence on the at least one characteristic. The invention thus benefits from the simplicity of DC operation. By operating at the LED in a DC mode, rather than say in a PWM mode, the requirement to be able to adjust the duty cycle is avoided. By including interruptions to the DC current, it is possible to utilize the LED itself to act as a sensor in order to determine a characteristic of the LED. The need for additional sensors is thereby avoided.
摘要:
A lighting assembly (100) configured to be mechanically and electrically connected to a socket (150), the lighting assembly comprising a lighting module (102) comprising a light source (106), electrical contacting means (108) electrically connected to the light source and a heat spreader (110) in thermal contact with the light source; and a connector (104) being rotatable in relation to the lighting module (102). The connector comprises connector locking means (119) for locking the lighting assembly to a socket through interaction with receiving locking means comprised in the socket when the lighting module is axially inserted into the socket and the connector is rotated relative to the lighting module and the socket, thereby bringing the electrical contacting means (108) into contact with corresponding receiving contacting means (122) comprised in the socket. Hereby, the space required for electrical contacting means in the lighting assembly and in the socket may be reduced as no space is reserved in the socket for rotation of the electrical connecting means.
摘要:
A surge protection circuit is disclosed for an electrical Load which may be for instance an LED load which is directly connected to a supply such as mains supply, and comprises a plurality of switches which are distributed across a plurality of semiconductor die. A surge detector detects the start of a spike in the supply, which results from, for example the commencement or interruption of a nearby inductive load, and opens all the switches. By distributing the switches across multiple die the peak voltage across each is reduced relative to using a single die; thereby each die can stay within the absolute maximum voltage capacity. Each die may have its own surge detector; alternatively, a single surge detector may be used which communicates with the switches on each of the die. In an extension the bridge rectifier may be integrated into the circuit distributed across the die. In this embodiment additional inter-die clamping diodes are required to prevent unsafe floating of the edge connections of each die.
摘要:
A lighting module (1) having a connection end (2) for connection to a lamp holder (3), and a light output end (4) for outputting light, wherein the lighting module (1), at the light output end (4), is provided with a mechanical interface comprising first (6) and second (7) protrusions extending in a direction parallel with a longitudinal axis (13) of the lighting module and being configured to interact with corresponding protrusions (6′,7′) on an identical mechanical interface to transfer at least one of a rotational force and a pulling force to the lighting module (1), so that a device (1′) provided with such an identical mechanical interface can be used as a tool for connecting/disconnecting the lighting module (1). An advantage is that it is possible to utilize one lighting module as a tool to connect/disconnect another lighting module from a lamp holder.