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Instrument lighting device

A lighting device and instrument technology, applied in the direction of instrument panel lighting equipment, instrument arrangement, measuring device, etc.

Active Publication Date: 2012-04-11
NIPPON SEIKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As such an instrument lighting device, in Patent Document 1, Patent Document 2, etc., without using a light guide or the like, the irradiation light from the light source is irradiated to the reflective surface through a reflective wall constituting a part of the instrument case, and by configuring the instrument The light reflected by the reflective surface of a part of the case illuminates the index portion provided on the display panel

Method used

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Embodiment Construction

[0030] Figure 1 to Figure 13 Embodiments of the present invention are shown, and a case where the embodiments of the present invention are applied to, for example, a meter lighting device mounted on an indicator meter of an automobile will be described below with reference to these drawings.

[0031] In this figure, the instrument lighting device in the pointer-type indicating instrument of this embodiment is composed of the following components: a circuit board 1; The pointer 4 is installed on the front end side of the drive shaft 2; the display panel 6 is arranged between the pointer 4 and the circuit board 1, and has an index portion 5 corresponding to at least the indication of the pointer 4; the light source 7 is installed On the front side of the above-mentioned circuit board 1, at least the above-mentioned indicator part 5 is illuminated through transmission; the instrument case 8 is arranged between the display panel 6 and the circuit board 1; The light from the ligh...

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Abstract

An instrument lighting device configured in such a manner that even index marks disposed away from the light sources can achieve sufficient luminance using a reduced number of light sources. An instrument lighting device comprising: a pointer needle (4) mounted to a drive shaft (2) of an instrument body (3); a display panel (6) having index marks (5); a light source (7b) for lighting the index marks (5); a reflecting surface section (9) for applying the light from the light source (7b) to the display panel (6); and a reflecting wall section (10) for guiding the light from the light source (7b) toward the reflecting surface section (9). The reflecting wall section (10) comprises a circular conical first reflecting wall section (10a) for mainly lighting index marks (5) which are present in a first index mark region (N) located close to the light source (7b), and also comprises a second reflecting wall section (10b) consisting of a curved surface or a flat sloped surface for mainly lighting index marks (5) which are present in a second index mark region (F) located farther away from the light source (7b) than the first index mark region (N). The instrument lighting device can illuminate the index marks (5) on the display panel (6) by transmitted light with substantially uniform luminance.

Description

technical field [0001] The present invention relates to an instrument lighting device that irradiates with illumination light from a light source from the back surface of a display panel of a light-transmitting indicating instrument, and performs transmitted illumination display on an index portion and the like. Background technique [0002] As such an instrument lighting device, there is known a type in which an instrument body with a drive shaft protruding from it is mounted on a circuit board, a pointer is mounted on the front end of the drive shaft, and behind the pointer, along the rotation track of the pointer, A display panel is provided with a light-transmitting indicator portion such as scales and characters, and the indicator portion and pointer of the display panel are illuminated by a light source arranged behind the display panel. As such an instrument lighting device, in Patent Document 1, Patent Document 2, etc., without using a light guide or the like, the ir...

Claims

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Application Information

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IPC IPC(8): G01D11/28
CPCG01D13/28G01D11/28B60K2360/336B60Q3/10B60K35/60
Inventor 友野浩一小川宪弘
Owner NIPPON SEIKI CO LTD
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