CN2178377Y - Electroluminescence lighting meter for car - Google Patents

Abstract

The utility model discloses an electroluminescence lighting meter for a car, which adopts that a luminous display screen which is made of luminescent materials replaces an incandescent lamp for lighting; besides, the utility model utilizes an electronic loop which is composed of a signal source, an electronic control circuit, a current transformer and a power supply to replace the existing circuit system which is composed of a lamp holder and a printed circuit board; light conducting elements and shading elements are omitted; therefore, the structure is simple; the defects that an incandescent lamp is easy to damage, owing to high heat, when used for lighting. The utility model has the advantages of good lighting effect, reliable performance, long service life, simple structure and convenient assembly.

Description

Electroluminescence lighting meter for car

The utility model relates to a kind of automobile instrument of electroluminescence lighting, specifically is a kind of automobile instrument that adopts electroluminescent material to make instrument panel.

Existing automobile instrument adopts through mode plastics table board in a large number, and various warnings and signal display piece are made instrument panel and demonstrated various parameters and signal, and its lighting engineering is to adopt traditional incandescent miniature bulb, and this traditional illumination component exists following shortcoming.One, illumination is uneven.Because incandescent miniature bulb is a kind of pointolite, on instrument panel, cause light inhomogeneous, not soft, so the dress part is equipped with a large amount of light guide structure spares outside, and the technology of repeatedly blocking of employing table board also, complex process, effect is not good enough.Two, assembling is complicated.Incandescent lamp bulb is mounted on the lamp socket, and lamp socket is installed in again on the wiring board of circuit complexity, and repeatedly Jie Chu electrically conducting manner has increased the complicacy of assembling, and adds various leaded lights and shading element, makes that more assembly technology is complicated.Three, performance quality shakiness, the life-span is short.This is because incandescent lamp bulb sends a large amount of heat when using, easily make the instrument element distortion aging, and, very easily fracture during galloping because filament is very thin, add that repeatedly loose contact appears in the electrically conducting manner of contact easily, these have all caused instrument function qualitative unreliable.

The purpose of this utility model just is to provide a kind of to be had illumination and evenly and not generates heat, and the automobile instrument that can cancel lamp socket and leaded light shield element overcomes the deficiency of existing automobile instrument.

The utility model utilizes illumination effect good, the cold light source that the complete AC electroluminescence material of colour code is made--and electroluminescent display panel replaces incandescent lamp and lamp socket and leaded light shield element; Because the AC electroluminescence material is could stimulated luminescence under the alternating current state of high voltagehigh frequency, and what all be equipped with on the automobile is direct supply, therefore is equipped with convertor circuit on automobile instrument, thereby makes the utility model realize its purpose, and its detailed structure is as follows:

Various table boards on the light emitting display formed automobile instrument panel of making by the AC electroluminescence material, luminescence units such as warning and signal display piece, form convertor circuit by signal source, electronic control circuit, transducer element, the light emitting display unit is by applying one deck electroluminescent material in the middle of the two-layer transparent plastic film, and draws two electrodes and constitute; Wherein the output terminal of electrode and DC-AC transducer links to each other, the output terminal of another root electrode and electronic control circuit links to each other, direct supply links to each other with DC-AC transducer input end, the input end of electronic control circuit links to each other with signal source, direct supply is also told two-way and is linked to each other with signal source and electronic control circuit in addition, to they power supplies.Direct supply, the DC-AC transducer, light emitting display, electronic control circuit, signal source is formed the convertor circuit loop successively.Signal source is sent signal, and when the control by electronic control circuit was input to light emitting display, light emitting display was promptly luminous.

Signal sources such as sensing of using on the automobile and warning all directly are coupled with power supply, for high pressure, AC power that they and light emitting display are used isolated, adopt in the circuit by controllable silicon, the independent electronic switch in parallel that resistance and Sheffer stroke gate are formed becomes electronic control circuit, or the Electronic Switching System of above-mentioned functions is integrated into integrated package.Each is corresponding a kind of signal source, the light emitting display of the corresponding connection of output terminal of connecting of electronic switch input end independently.According to the needs of signal source, the electronic switch branch is just triggering and is bearing the two kinds of situations that trigger, and this realizes by Sheffer stroke gate in the electronic switch.Because the direct supply voltage fluctuation is very big on the automobile, therefore on the transducer input end, add the wave filter of forming by electric capacity, resistance, voltage dependent resistor (VDR).In the DC-AC transducer, add instantaneous pressure pulse protective device in addition.

Comparing with prior art, be that the electroluminescence cold light source has replaced original incandescent lamp owing to what adopt, thereby illuminating effect is better, the richer reality of color, and electricity consumption more economizes, and is more durable in use than incandescent lamp.Electroluminescent material just entered the half life period more than 10,000 hours in addition, and electric current can be luminous after connecting, thereby be easy to find out fault when instrument breaks down, and made things convenient for maintenance.Because electroluminescent material does not generate heat, and has improved meter life, and the instrument function quality is further enhanced.And electroluminescent display panel does not need the required lamp socket of conventional incandescent, support, light-guide device, shield element, therefore can thoroughly change the outward appearance of existing instrument, again because the electroluminescence lighting circuit is very simple, make printed-wiring board (PWB) obtain basic simplification, changed the repeatedly electrically conducting manner of contact, in generation, connect with connector, therefore outward appearance greatly simplified, and makes assembling simpler again.

Also in conjunction with the accompanying drawings the utility model is described further below by embodiment.

Fig. 1 is an Isuzu Motors combination instrument screen board synoptic diagram.

Fig. 2 is the electroluminescent display panel structural representation.

Fig. 3 is electroluminescent display panel convertor circuit figure.

Fig. 4 is an electroluminescent display panel convertor circuit block scheme.

Speedometer table board 1 among Fig. 1, oil mass and water-thermometer board 2, vehicle condition warning and signal display plate 3 are combined into the screen board of instrument, 18 bulbs of minimum in the prior art needs, these bulbs are inserted on the lamp socket, lamp socket is connected with printed-wiring board (PWB) by conductive plane again, and screen board 3 various signals will show that this needs the various leaded lights and the element that is in the light again with different colours.

Now cancel incandescent lamp bulb and inner light guide structure spare behind the screen board 3, cause the light emitting display unit combination that luminescent material makes with the different alternating current of colour code and become screen board 3, as shown in Figure 2, wherein A figure is the electroluminescence screen sectional schematic diagram, 4 is electroluminescent display panel, each light emitting display 4 adopts the different AC electroluminescence material 5 of colour code as required, luminescent material 5 is by thick plastic sheeting 6 hot sealings of 0.1mm, from electroluminescent material 5, draw two electrodes 7, wherein one is connected with DC-AC converter output terminal line 8, and another root links to each other with signal source B by the electronic switch in the electronic control circuit.

Among Fig. 3, adopted in the circuit by controllable silicon K ₀, K ₁K _n, resistance R and Sheffer stroke gate I ₁, I ₂I _m, the march-past electronic switch of composition constitutes electronic control circuit 9, and increases C ₂Load compensation electric capacity.The 4th, each electroluminescent display panel S _n, S _nBeing combined into screen board 3,10 is the DC-AC transducer, capacitor C ₁, voltage dependent resistor (VDR) D and resistance R _NForm wave filter 11,12nd, signal source.

The annexation of each element is as shown in Figure 4 among Fig. 3:

Direct supply divides three the tunnel to give signal source 12 respectively, electronic control circuit 9 and give light emitting display 4 power supplies through DC-AC transducer 10, and 12V or 24V direct supply are transformed into AC power by the DC-AC transducer on the automobile.An electrode 7 by power lead 8 and light emitting display 4 links to each other; the output terminal of signal source 12 links to each other with the electronic switch input end; an electrode 7 of electronic switch output terminal and light emitting display 4 links to each other; add wave filter 11 at DC-AC transducer 10 input ends, and in transducer 10, add instantaneous pressure pulse protective device.

Claims (3)

1, the automobile instrument of electroluminescence lighting, comprise the various table boards on light emitting display (4) the formed automobile instrument panel of making by AC electroluminescence material (5) (3), luminescence units such as warning and signal display piece, and by signal source (12), electronic control circuit (9), the convertor circuit that transducer element (10) is formed is characterized in that:

Light emitting display unit (4) is by applying one deck electroluminescent material (5) in the middle of the two-layer transparent plastic film (6), and draw two electrodes (7) and constitute, wherein an electrode (7) links to each other with the output terminal of DC-AC transducer (10), and the output terminal of another root electrode (7) and electronic control circuit (9) links to each other.

2, according to wanting the sharp automobile instrument that requires 1 described electroluminescence lighting, it is characterized in that:

By controllable silicon Kn, the independent electronic switch in parallel that resistance R and Sheffer stroke gate Im form becomes electronic control circuit (9).

3, the automobile instrument of electroluminescence lighting according to claim 1 is characterized in that:

Input end at transducer (10) adds by capacitor C ₁, resistance R _n, the wave filter (11) that voltage dependent resistor (VDR) D forms adds instantaneous pressure pulse protective device in addition in DC-AC transducer (10).

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