CN203464175U - Automobile meter light guide lighting device - Google Patents

Abstract

The utility model discloses an automobile meter light guide lighting device which comprises a light source, light guide rings and a bracket, wherein the light source is positioned right below the light guide rings; the light guide rings with radians are arranged and positioned on the bracket; a plurality of notches are formed in the light guide rings. By adopting the automobile meter light guide lighting device, the light of two light emitting diodes can be uniformly radiated to a scale disc through the light guide rings, and the light can be uniformly distributed, so that the cost is greatly lowered, and the requirements in light brightness testing are met.

Description

A kind of automobile instrument light-guiding illuminating device

Technical field

The utility model relates to automobile instrument back lighting technology, particularly relevant about a kind of automobile instrument light-guiding illuminating device.

Background technology

Traditional instrument backlight illuminating system is the mode that adopts the straight photograph of light emitting diode provides back lighting for instrument.

At present a lot of instrument all adopt this mode to provide back lighting for instrument, and its pluses and minuses are obvious.Advantage is: instrument structure simplicity of design, see Fig. 1, and instrument framework only need be dodged the position of LED lamp 10.Shortcoming is: 1, cost is high, needs a plurality of LED lamp 10 illuminations.2, backlight inhomogeneous, reason is that the luminous energy of light emitting diode on the diametric plane such as grade centered by light emitting source is identical, from light emitting source more away from, luminous energy is less, therefore light emitting diode impinges upon on dial, directly over must be the brightest, along with the expansion of radius, brightness also slowly reduces, and is reflected in and on dial, just there will be bright dark clearly demarcated region.

In order to solve the generation of this phenomenon, traditional method has two kinds: 1, increase LED lamp quantity again and improve uniformity.2, be to provide uniformity by dial back up site.But two kinds of methods have shortcoming, automobile instrument industry competition is now in perfervid state, and cost can not be ignored.A kind of front method, the increase of light emitting diode quantity will inevitably cause the rising of cost, makes product lose competitiveness.In addition, dial illumination effect is different according to the demand of producer, and the color of light emitting diode is also different.If adopting the cold light source such as white, green, blue is back lighting, can face larger pressure so on cost.A kind of rear method, or need certain light emitting diode quantity, could illuminate completely, on cost, do not save most.And the site printing additional is can be descried, sacrificed to a certain extent the illuminating effect of instrument.

Car load factory is more and more stricter to the requirement of combination instrument illumination at present, such as the large car load factories such as upper vapour, general five water chestnuts have proposed combination instrument light testing standard one after another, whether judgement illumination meets the requirements is not only to weigh by subjective naked eyes, but will test to judge by lamplight brightness.

Given this, I study intensively process, and use the powerful light simulation softward of high-touch feature, design a kind of automobile instrument light-guiding illuminating device.

Utility model content

The purpose of this utility model is to provide a kind of automobile instrument light-guiding illuminating device, and simple in structure, cost is low, and illuminating effect is good.

In order to achieve the above object, technical solution of the present utility model is:

Automobile instrument light-guiding illuminating device, comprises lamp source, light guide ring and support; Lamp source is positioned under light guide ring, with the rack-mount location of light guide ring of radian, offers some breach on light guide ring.

Described breach, nearer apart from lamp source, breach distribution density is less, notch geometry is less.Described breach is distributed on the inner ring surface and outer ring surface of light guide ring.

Described light guide ring comprises two light-guiding pillars of arc, and two column caps that light-guiding pillar two ends are connected to form.

Described column cap can extend to light guide ring is outside.

Described column cap also can extend to light guide ring is inner.

Described light guide ring is the integrative-structure of ring-type.

Described support, forms bowl-shape groove at the position that light guide ring is installed.

Described lamp source is positioned under column cap end face.

Compared with the prior art the utility model, has the following advantages and good effect:

Adopt after such scheme, the utility model can be irradiated to the light of two light emitting diodes on whole dial by light guide ring uniformly, and intensity of illumination distribution is even.So not only reduce greatly cost, also can meet lamplight brightness test request.

Accompanying drawing explanation

Fig. 1 is automobile instrument light-guiding illuminating device in prior art;

Fig. 2 is light guide ring schematic perspective view in the utility model preferred embodiment;

Fig. 3 is light guide ring floor map in the utility model preferred embodiment;

Fig. 4 is the utility model preferred embodiment scheme of installation one;

Fig. 5 is the utility model preferred embodiment scheme of installation two;

Fig. 6 is light guide ring assembling side schematic view in the utility model preferred embodiment;

Fig. 7 is light guide ring schematic perspective view in another preferred embodiment of the utility model;

Fig. 8 is light guide ring floor map in another preferred embodiment of the utility model;

Fig. 9 is another preferred embodiment scheme of installation one of the utility model.

The specific embodiment

By reference to the accompanying drawings, to the utility model, preferred embodiment is described in further details.

Automobile instrument light-guiding illuminating device, comprises lamp source 1, light guide ring 2 and support 3.

Light guide ring 2 as shown in Figure 2, comprises that 21, two light-guiding pillar 21 two ends of two light-guiding pillars of arc are in conjunction with forming column cap 22.Column cap 22 can be as shown in Figure 2 to light guide ring 2 extensions, also can be as shown in Figure 6, and to the interior extension of light guide ring 2.Extend internally and can reduce the shared area of light guide ring 2.

Light guide ring 2 in the present embodiment is integral structures, the good water white transparency PC of its material selection leaded light performance and physical property.The mould of making light guide ring 2 needs finishing polish, and especially light-guiding pillar 21 planes of light incidence, need to make mirror effect.Light-guiding pillar 21 need to be designed to radian by calculating according to the folding of light, principle of reflection, is more constantly simulated and optimized curvature by optical simulation software lighttools, guarantees light light guide ring 2 inside that are imported into as much as possible.

In the present embodiment, on the inner ring surface of light guide ring 2 and outer ring surface, offering some breach 4, is also by calculating and light board design, to go out size and the distribution density of different breach 4, makes light can be irradiated to uniformly whole gauge outfit region.The design principle of breach 4 is, is arranged on the both sides of light guide ring 2, and breach is for astigmatism, from light source more close to, light is just stronger, the shape of breach 4 designs will be less, density is also less.By optical simulation software lighttools, constantly simulate again and optimize breach 4 designs.

In addition, lamp source 1 to select the impact on whole illuminating effect be also very large, to different light emitting diodes, need to distribute according to light emitting diode energy curve, by lighttools, revise simulation, the design of adjustment light guide ring 2.As shown in Figure 5, lamp source 1 is fixed on circuit board 5 in the installation site in lamp source 1, and lamp source 1 is positioned under the end face of light guide ring 2 column caps 22.

Support 3 is parts of instrument housing, in the position that light guide ring 2 is installed, to lower recess, forms bowl-shape groove 31.Major function is used for fixedly light guide ring 2, guarantees position accurately and can not become flexible.Bowl-shape groove 31 needs high-precision polishing, is conducive to like this improve the problem of brightness uniformity.Wherein the radian of bowl-shape reflective surface, needs optical simulation software lighttools simulate and optimize.

During the utility model work, the brightest and the darkest difference of combination instrument probably can be controlled at 10cd/m ²in scope, naked eyes are to be difficult to find out bright dark variation, very evenly.

Above-described embodiment is only for the inventive concept of the present utility model of explaining, but not restriction to the utility model rights protection, allly utilizes this design to carry out the change of unsubstantiality to the utility model, all should fall into protection domain of the present utility model.

Claims (9)

1. automobile instrument light-guiding illuminating device, is characterized in that: comprise lamp source, light guide ring and support; Lamp source is positioned under light guide ring, with the rack-mount location of light guide ring of radian, offers some breach on light guide ring.

2. automobile instrument light-guiding illuminating device as claimed in claim 1, is characterized in that: described breach, nearer apart from lamp source, breach distribution density is less, notch geometry is less.

3. automobile instrument light-guiding illuminating device as claimed in claim 1, is characterized in that: described breach is distributed on the inner ring surface and outer ring surface of light guide ring.

4. automobile instrument light-guiding illuminating device as claimed in claim 1, is characterized in that: described light guide ring comprises two light-guiding pillars of arc, and two column caps that light-guiding pillar two ends are connected to form.

5. automobile instrument light-guiding illuminating device as claimed in claim 4, is characterized in that: described column cap extends to light guide ring is outside.

6. automobile instrument light-guiding illuminating device as claimed in claim 4, is characterized in that: described column cap extends to light guide ring is inner.

7. the automobile instrument light-guiding illuminating device as described in claim 1,6 or 7, is characterized in that: the integrative-structure that described light guide ring is ring-type.

8. automobile instrument light-guiding illuminating device as claimed in claim 1, is characterized in that: described support, forms bowl-shape groove at the position that light guide ring is installed.

9. automobile instrument light-guiding illuminating device as claimed in claim 4, is characterized in that: described lamp source is positioned under column cap end face.

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