Illumination device
View Patent ↗An illumination device comprising an LED ( 14 ) mounted on a rear of a PCB ( 12 ), and a light pipe ( 16 ) to direct light from the LED through an aperture ( 18 ) in the PCB to illuminate a legend ( 10 ) on the front of the PCB, the light pipe diffusing the light so as to prevent uneven illumination of the legend.
1. An illumination device, mounted on a rear side of a printed circuit board said device comprising:
at least one light source ( 14 );
directing means ( 16 ) for directing light emitted from at least one light source ( 14 ) along a path to a regions ( 10 ) to be illuminated;
said light being directed from said rear side, through an aperture in the printed circuit board, to the other side of the printed circuit board, said aperture being surrounded by one or more regions comprising touch sensitive button or switches; and
wherein the light is diffused by the directing means ( 16 ) as it moves along the path.
2. The illumination device according to claim 1 wherein said at least one light source is located remotely from said region to be illuminated.
3. The illumination device according to claim 1 wherein said printed circuit board forms part of a display panel.
4. The illumination device according to claim 3 wherein the regions to be illuminated forms part of a front of said display panel.
5. The illumination device according to claim 4 wherein said region includes a legend representing a mode or providing information.
6. The illumination device according to claim 5 wherein said directing means transmits light to a rear surface of said legend in said display panel to illuminate the display panel.
7. The illumination device according to claim 6 wherein said directing means diffuses the light to substantially prevent said legend from being illuminated unevenly.
8. The illumination device according to claim 1 wherein said region is touch sensitive.
9. The illumination device according to claim 1 wherein light from said at least one light source having one color can be mixed evenly together with a different color of said at least one light source via the directing means to achieve other light colors.
10. A broadcast data receiver ( 20 ), said receiver comprising:
a display panel ( 2 ) having a printed circuit board:
an illumination device mounted on a rear side of said printed circuit board, said illumination device further including
at least one light source ( 14 ),
directing means ( 16 ) for directing light emitted from at least one light source ( 14 ) along a path to a region ( 10 ) to be illuminated;
said region forming part of a front of said display panel has one or more touch-sensitive button or switching portions;
said light being directed from said rear side of the printed circuit board, through an aperture in the printed circuit board, to a rear surface of said region in said display panel; and
and wherein the light is diffused by the directing means ( 16 ) as it moves along the path.
11. Electrical apparatus, said apparatus comprising:
a display panel ( 2 );
a printed circuit board ( 6 ) and a fascia ( 4 ) being provided on said display panel;
one or more touch-sensitive button or switching portions ( 8 ) provided with said fascia;
one or more legends ( 10 ) associated with the touch-sensitive button or switching portions;
one or more openings ( 18 ) in the printed circuit board corresponding to the one or more legends and/or touch-sensitive button or switching portions;
one or more light sources ( 14 ) mounted on a rear of the printed circuit board; and
wherein directing means ( 16 ) being provided to direct the light from at least one light source to at least one legend via an opening in the printed circuit board and to diffuse the light to illuminate the legend substantially evenly.