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Disk pointer instrument cluster Disclosure Number: IPCOM000027969D
Original Publication Date: 2004-May-25
Included in the Prior Art Database: 2004-May-25

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Most instrument panels in automobiles contain an additional dot matrix to inform the driver (e.g. of the temperature of the passenger cab, etc.). Therefor at least two construction elements equipped with light sources (e.g. LED) are required. One for the illumination of the dial with the disk pointer (used to display the speed), and one for the background illumination of the dot matrix. The here proposed solution requires just one construction element equipped with light sources to illuminate both, the disk pointer/dial and the dot matrix (display). It is proposed to use a setup as shown in Fig. 1. Just one construction element is equipped with light sources (LED). The emitted light travels through the disk illuminating the disk pointer and leaves the disk at its edge illuminating the dial. Also the light illuminates the dot matrix (display). Fig. 2 illustrates the rays of light from the LEDs through the disk to the disk pointer. The disk pointer can be applied with a light absorbing film/layer (Fig. 2) to highlight the pointer's edge. The lower part of Fig. 2 shows an alternative way constructing the disk and arranging the LEDs. Fig. 3 shows an embodiment of the proposed solution.