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US 6,854,416 B2Granted
Display instrument
AssigneeSiemens Aktiengesellschaft
InventorsHerbert Breinich, Bertram Eschenbach, Karl-Heinz Mittenbühler, Sabine Vorberg
Life of this patent
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Abstract
A display instrument with two illuminated pointers, in which instrument the illuminated pointers (4, 6) are supplied with light via a light splitter (10). The latter has a frustum-shaped depression (21) so that a portion of the light is radiated in the axial direction and passes into the upper illuminated pointer (4). A further portion is scattered radially at the generated surface (24) of the frustum (23) and passes into the lower illuminated pointer (6).
Claims15
A display instrument comprising
- at least two illuminated pointers which are located one on top of the other, each composed of a head and a pointer lug and rotatable independently of one another about a common display axis, the illuminated pointers being composed of a light-guiding material and each having a light entry face and light injected there exiting on a side of the pointer lugs facing a viewer,
- a drive unit (3), the drive unit (3) driving an upper pointer (4) of said pointers, a lower pointer (6) of said pointers being located, or moveable, between the drive unit (3) and the upper pointer (4), wherein for at least two of the illuminated pointers (4, 6) there is a common light source, and light is fed to the illuminated pointers (4, 6) via a light splitter (10), wherein a drive shaft (7) of the upper pointer (4) serves as a light guide and a portion of the drive shaft (7) is embodied as the light splitter (10), and the light is led from the drive shaft (7) of the upper pointer (4) via the light splitter (10) to a generated surface (32) of the lower pointer (6), and
- light from the light source enters a bottom portion of the drive shaft, and is conducted via the drive shaft (7) through the drive unit (3) to the light splitter (10).
A display instrument comprising:
- at least two illuminated pointers which are located one on top of the other, each composed of a head and a pointer lug, the illuminated pointers being rotatable independently of one another about a common display axis, the pointers being composed of a light-guiding material and each having a light entry face wherein light injected at the entry face exits on a side of the pointer lugs facing a viewer;
- a drive unit (3), the drive unit (3) driving an upper pointer (4) of said pointers, a lower pointer (6) of said pointers being located for movement between the drive unit (3) and the upper pointer (4), wherein for at least two of the illuminated pointers (4, 6) there is a common light source on a side of the drive unit opposite the pointers, and light is fed to the illuminated pointers (4, 6) via a light splitter (10), wherein a drive shaft (7) of the upper pointer (4) serves as a light guide and a portion of the drive shaft (7) is embodied as the light splitter (10), and the light is led from the light source via the drive shaft (7) of the upper pointer (4) through the drive unit to the light splitter (10) and via the light splitter to a generated surface (32) of the lower pointer (6);
- and
- wherein the light splitter 10 has a frustum-shaped coaxial depression located on an axis of the drive shaft (7) of the upper pointer for directing rays of a portion of the light from the light source toward the upper pointer and further rays from a further portion of the light from the light source toward the lower pointer.
1 more element
A display instrument comprising:
- at least two illuminated pointers which are located one on top of the other, each composed of a head and a pointer lug, the illuminated pointers being rotatable independently of one another about a common display axis, the pointers being composed of a light-guiding material and each having a light entry face wherein light injected at the entry face exits on a side of the pointer lugs facing a viewer;
- a drive unit (3), the drive unit (3) driving an upper pointer (4) of said pointers, a lower pointer (6) of said pointers being located for movement between the drive unit (3) and the upper pointer (4), wherein for at least two of the illuminated pointers (4, 6) there is a common light source, and light is fed to the illuminated pointers (4, 6) via a light splitter (10), wherein a drive shaft (7) of the upper pointer (4) serves as a light guide and a portion of the drive shaft (7) is embodied as the light splitter (10), and the light is led from the light source via the drive shaft (7) of the upper pointer (4) to the light splitter (10) and via the light splitter to a generated surface (32) of the lower pointer (6);
- and
- wherein the light splitter 10 has a frustum-shaped coaxial depression located on an axis of the drive shaft (7) of the upper pointer for directing rays of a portion of the light from the light source toward the upper pointer and further rays from a further portion of the light from the light source toward the lower pointer.
1 more element
Dependencies are inferred from the claim text.