摘要:
A compact backlight system has a light-emitting panel (1) with a front wall (2), a rear wall (3) situated opposite thereto, a first edge surface (4) and, opposite thereto, a second edge surface (5) . A first light source (6) is associated with the first edge surface (4) which is light-transmitting. The light-emitting panel (1) widens over a widening section (100) from the first edge surface (4) in a direction towards the second edge surface (5), and the rear wall (3) is provided over the widening section (100) with a multiplicity of steps (13, 13′, . . . ) each having a surface (17) facing the front wall (2) which is substantially parallel to the front wall (2).
摘要:
The invention relates to a light panel (12), comprising: a light guide having a front surface defining a viewing window (11), a back surface and sides (3, 4) between the front and back surfaces; and a patterned array of light sources (8, 9, 10) of at least two types, which types are distinguished by the color of light emitted by the light sources of said at least two types, said array being arranged along at least one of the sides. Each light source generates in use a divergent light beam of a color into the panel to, in combination, color the panel. Further, the array comprises complementary sub-arrays (8, 9, 8, 9 & 9, 10, 9, 10) of light sources along at least two of the sides. Since the sub-arrays are complementary, in that by all light sources of the different types the same amount of light is emitted into the light guide as in prior art single array configurations (the same number of light sources), but from two or more sides while maintaining the general light source pitch, the average distance or pitch between light sources of one of the types, can be decreased. Therewith also the required distance or colors for color mixing is lessened and the viewing window is enlarged.
摘要:
A backlight system includes at least first and second light-emitting panels (1; 11) having a front wall (2; 12), an opposing rear wall (3; 13) and opposite edge surfaces (4, 14; 5, 15). At least one of the edge surfaces (4; 14) is light-transmitting and associated with a light source (6; 16). Light originating from the light source is diffused in the light-emitting panels and coupled out of the light-emitting panels in the direction of a display device (25), preferably a LCD device. The light source associated with the first light-emitting panel (1) has clusters of red and blue or red and green LEDs. The light source (16) associated with the second light-emitting panel (11) has clusters of blue and green LEDs or only green LEDs.
摘要:
A backlight system comprises at least two light-emitting panels (1; 11) having a front wall (2; 12), an opposing rear wall (3; 13) and opposite edge surfaces (4, 14; 5, 15). At least one of the edge surfaces (4; 14) is light-transmitting and associated with a plurality of light sources (6, 16). Light originating from the light sources (6; 16) is diffused in the panel (1; 11). Sub-surfaces (8, 18) of the rear walls (3, 13) are provided with means for extracting light from the panel (1, 11). In operation, said sub-surfaces (8, 18) project light on areas (9, 19) of an (imaginary) plane (40) which is positioned parallel to the light-emitting panels (1, 11). Said projected areas (9, 19) in the plane (40) are substantially contiguous. Preferably, said sub-surfaces (8, 18) are remote from the light-transmitting edge surfaces (4; 14). Preferably, each of said sub-surfaces (8, 18) forms a single surface covering half the front wall (2, 12) of the light-emitting panel (1, 11). Alternatively, the sub-surfaces encompass a substantial area of the rear walls, the distribution of the means for extracting light from the panel being such that the amount of extracted light changes as a function of the distance to the light-transmitting edge surfaces. Preferably, the light source comprises a plurality of red, green, blue (and amber) LEDs, each preferably having a luminous flux of at least 5 lumen.
摘要:
A backlight system for illuminating a display device comprises a light-emitting panel (1) having a front wall, an opposing rear wall and edge areas (4). At least one of the edge areas (4) is light-transmitting and associated with a light source. The light source associated with the light-transmitting edge areas (4) of the light-emitting panel (1) comprises symmetric clusters (C) of light-emitting diodes having three mutually different light emission wavelengths, for example symmetric clusters (C) of blue, green and red LEDs (6G, 6B, 6R, 6B′, 6G′; 6G, 6B, 6R, 6B′, 6G′; . . . ).
摘要:
An illumination system for illuminating a display device (3) comprises a light-emitting panel (1) having a light-emission window (2) and at least one edge surface (4) for coupling light into the light-emitting panel (1). The illumination system further comprises a light mixing chamber (5) provided with a light source (6). The light mixing chamber (5) is associated with the edge surface (4). According to the invention, the light source (6) comprises a plurality of clusters of light-emitting diodes (LEDs) having different light-emission wavelengths, the clusters being arranged at a pitch P with respect to each other. The ratio of the height H of the light mixing chamber (5) to the pitch P of the clusters meets the relation 0.1≦H/P≦10, preferably 0.2≦H/P≦2. Preferably, each cluster comprises one blue, one green and one red LED, or one blue, two green and one red LEDs. Preferably, each LED has a luminous flux of at least 5 lumen. The illumination system according to the invention has a very uniform light distribution, so that the display device is uniformly illuminated.
摘要翻译:用于照明显示装置(3)的照明系统包括具有发光窗(2)的发光面板(1)和用于将光耦合到发光面板(1)中的至少一个边缘表面(4) 。 照明系统还包括设有光源(6)的光混合室(5)。 光混合室(5)与边缘表面(4)相关联。 根据本发明,光源(6)包括具有不同发光波长的多个发光二极管(LED)簇,所述簇以相对于彼此的间距P布置。 光混合室(5)的高度H与簇的间距P的比例满足关系式0.1 <= H / P <= 10,优选为0.2 <= H / P <= 2。 优选地,每个簇包括一个蓝色,一个绿色和一个红色LED,或一个蓝色,两个绿色和一个红色LED。 优选地,每个LED具有至少5流明的光通量。 根据本发明的照明系统具有非常均匀的光分布,使得显示装置被均匀地照明。
摘要:
An electrical interface module (EIM) is provided between an LED illumination device and a light fixture. The EIM includes an arrangement of contacts that are adapted to be coupled to an LED illumination device and a second arrangement of contacts that are adapted to be coupled to the light fixture and may include a power converter. Additionally, an LED selection module may be included to selectively turn on or off LEDs. A communication port may be included to transmit information associated with the LED illumination device, such as identification, indication of lifetime, flux, etc. The lifetime of the LED illumination device may be measured and communicated, e.g., by an RF signal, IR signal, wired signal or by controlling the light output of the LED illumination device. An optic that is replaceably mounted to the LED illumination device may include, e.g., a flux sensor that is connected to the electrical interface.
摘要:
An illumination module includes a color conversion cavity with a first interior surface having a first wavelength converting material and a second interior surface having a second wavelength converting material. A first LED is configured to receive a first current and to emit light that preferentially illuminates the first interior surface. A second LED is configured to receive a second current and emit light that preferentially illuminates the second interior surface. The first current and the second current are selectable to achieve a range of correlated color temperature (CCT) of light output by the LED based illumination device.
摘要:
An illumination module includes a plurality of Light Emitting Diodes (LEDs). The illumination module includes a reflective mask cover plate disposed over the LEDs. The reflective mask includes a patterned reflective layer with an opening area aligned with the active die area of the LEDs. The reflective mask may be a patterned reflective layer disposed between the plurality of LEDs and a lens element, wherein a void in the patterned reflective layer is filled with a material that mechanically and optically couples the plurality of LEDs and the lens element. The illumination module may include a color conversion cavity that envelopes a lens element that may include a dichroic filter. The lens element may have different surface profiles over different groups of LEDs.
摘要:
An illumination module includes a color conversion cavity with multiple interior surfaces, such as sidewalls and an output window. A shaped reflector is disposed above a mounting board upon which are mounted LEDs. The shaped reflector includes a first plurality of reflective surfaces that preferentially direct light emitted from a first LED to a first interior surface of the color conversion cavity and a second plurality of reflective surfaces that preferentially direct light emitted from a second LED to a second interior surface. The illumination module may further include a second color conversion cavity.