US 11,506,523 B2Granted

Light guide pointer and light emitting pointer device

AssigneeYazaki Corporation

InventorsYasufumi Mochizuki, Terukazu Kuboyama, Ami Shibahara

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Abstract

In a light guide pointer, a vertex portion of a light control space is located on a sub-pointer portion side with respect to a center axis of a light entrance shaft, providing appropriate luminance balance between a main pointer portion and the sub-pointer portion. The light control space includes a circular arc portion, thereby broadening diffusion range of light that has passed through the light control space and preventing attenuation of light traveling along inclined portions. A center of the circular arc portion is located on the main pointer portion side with respect to the center axis, allowing strong light that has entered the light control space from the vertex portion to be diffused more. Local focusing and/or attenuation of light can be prevented, while providing appropriate luminance balance between the main pointer portion side and the sub-pointer portion side, thereby reducing luminance unevenness at the light emitting face.

Claims12

Dependent claims

A light guide pointer comprising:

a light entrance shaft arranged coaxially with respect to a light guide member on a light source side;
a main pointer portion extending to a first side in an intersecting direction intersecting the light entrance shaft;
a sub-pointer portion extending to a second side in the intersecting direction and having a length shorter than a length of the main pointer portion;
a light emitting face formed on faces of the main pointer portion and the sub-pointer portion opposite to the light entrance shaft;
and
a light control space formed between the light entrance shaft and the light emitting face, the light control space being formed by:
a vertex portion located on the second side with respect to a center axis of the light entrance shaft;
a circular arc portion formed protruding with respect to the vertex portion toward the light emitting face and having a center located on the first side with respect to the center axis of the light entrance shaft;
and
a pair of inclined portions connecting both ends of the circular arc portion and the vertex portion,
wherein the center axis of the light entrance shaft passes through one of the pair of inclined portions.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/912,980Filed 26 Jun 2020
Priority: JP JP2019-14096331 Jul 2019
Published: US 2021/0033432 A14 Feb 2021
Granted: 22 Nov 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

G01D 11/28
Component parts of measuring arrangements not specially adapted for a specific variable: structurally-combined illuminating devices
G01D 13/265
Adapted to perform a further operation, e.g. making electrical contact: pointers which conduct light
B60K 35/21
Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor: using visual output, e.g.…
B60K 35/60
Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles: instruments characterised by their location or relative…