CN2210126Y - Automobile licence plate with semi-conductor automatic lighting - Google Patents

Abstract

The utility model relates to a motorcar license plate with photoelectric automatic luminescence, which can automatically display bright words under insufficient light, and the visual range is obviously extended. The license plate is of an integral structure and is mainly composed of a base plate (1) of the license plate, concave or hollow word slots (2) on the base plate, semiconductor luminescence words (3) inlaid in the word slots, word crests (4) of the luminescence words, an automatic photoelectric switch module (5) and a photoelectric receiving head (6) on the module. The license plate can replace the traditional license plate and can dispense with original license plate lamps, and the words of the license plate are automatically luminescent or extinct and are not affected by manual control. A headstock on which the luminescence license plate is assembled is convenient in use, and the luminescence license plate is in favor of the management of the headstock.

Description

Automobile licence plate with semi-conductor automatic lighting

The utility model relates to luminous license plate of car, particularly a kind of can be when illumination be not enough, the automatic guidance licence plate is luminous, is applicable to the license plate with luminous that self-propelled vehiclees such as passenger vehicle and car use.

Existing license plate is to go out the convex character code on thin plate, coats colored paint again and makes.When illumination was not enough, visiblity descended, so automobile all is provided with tailstock registration mark light to throw light on.But registration mark light is limited by the installation site, and the light projector oblique angle is bigger than normal, so effect is not good enough.Particularly the registration mark light switch is controlled by the people, forgets that the situation of turning on light even deliberately not turning on light happens occasionally, especially with the crime vehicle for very.And the headstock licence plate more is subjected to condition restriction, at all with regard to unlicensed illuminator illumination.This is very unfavorable to transport administration.Recently people are with fluorescent paint coated licence plate base plate, to strengthen the night vision effect.But licence plate still be unable to do without exterior illumination, and writing is still uncertain, so produce little effect.

Chinese patent 90200911.7 proposes to patch in the jack on licence plate, with solution night vision problem with luminous type.Because this character code is the type structure of plug-in type, can choose a plurality of types easily and arbitrarily be inserted in arbitrary jack on the licence plate, so the specific layout of licence plate character code can not be guaranteed, that is be to adapt sign indicating number arbitrarily, this will cause the licence plate coding chaotic, and this is that traffic control department is receptible anything but.In addition, this character code front by the transparent cover plate monoblock cover, appearance is the plane, this is unfavorable for watching.This licence plate also no matter ambient light according to strong and weak, total as long as electric switch does not cut off the power supply, licence plate is promptly long brightly not to go out, this is unfavorable for energy-conservation.

The purpose of this utility model is to provide a kind of luminous character code by the photoelectricity automatic switch control, promptly by day, licence plate extinguishes automatically, at night, licence plate is lighted automatically, and licence plate is also glittering automatically in the process of automobile variable speed, and the licence plate character code is luminous clear eye-catching, and character code is once the automatic license plate with luminous of determining just can't change of self-propelled vehicle quartz conductor.

The purpose of this utility model is to realize by such technical scheme, be that the utility model comprises licence plate substrate and luminous character code, it is characterized in that: on the licence plate substrate, have the word groove of settling luminous character code, embed semiconductor light emitting character code entity in the word groove, the electrode leads to client of luminous character code links to each other with the mouth of photoelectricity automatic switch.

The embodiment of the indefiniteness that said structure of the present utility model can provide by accompanying drawing further specifies.

The utility model has following accompanying drawing:

Accompanying drawing 1 is " 0 " character code cutaway view of concave pattern groove on the substrate;

Accompanying drawing 2 is outline letters groove " a 0 " character code cutaway view on the substrate;

Accompanying drawing 3 is the electrical block diagram of photoelectricity automatic switch;

Accompanying drawing 4 is the structural representation of mercury switch;

Accompanying drawing 5 is license plate with luminous power-supply system figure;

Accompanying drawing 6 is the structural representation of license plate with luminous.

Referring to Fig. 1, directly process concave pattern groove 2 on the licence plate substrate 1, it is embedded in luminous character code entity 3, is " 0 " character code entity shown in the figure, and its display surface is a prefix 4.

Referring to Fig. 2, directly process the outline letters groove on the licence plate substrate 1, it is embedded in luminous character code entity 3, is " 0 " character code entity shown in the figure, and its display surface is a prefix 4.

Referring to Fig. 3, in the circuit embodiments of this photoelectricity automatic switch, mainly by the photoelectricity input circuit, voltage comparator, Darlington output loop, the moving circuit of sudden turn of events speed flash and protective circuit are formed.

Wherein: T1, R0, R1, R7, C1 form comparator end of oppisite phase photoelectricity input circuit.T1 is photo-transistor or other photosensors, and R0, R1 are the photosensitive tube load resistors.Signal level rises during light intensity, descends when light is weak.R0 is a NTC resister, and it makes temperature compensating to T1, with stable operation.Particularly design the compensating action of R0 greatlyyer here, to form overcompensation to T1.In summer, the strong temperature of illumination is also high, and the R0 resistance descends, and this just makes the illumination critical value of comparator action suitably improve, to adapt to the general higher situation of illumination in summer.In the winter time, the weak temperature of illumination is also low, and the R0 resistance increases, and this just makes the illumination critical value of comparator action suitably reduce, to adapt to the general situation on the low side of illumination in winter.This design utilizes the correlativity of illumination and temperature, can change the action illumination value of photoelectric switch automatically, to adapt to the visual characteristic of human eye under the illumination of summer in winter differs bigger situation.C1, R7 constitute the integration passage, disturb in order to the filtering stray illumination.

A1 is an integrated voltage comparator, and R4, R5 dividing potential drop obtain comparator reference voltage.Regulating R4 promptly is to set the comparator operating value.Conventional comparator attonity return difference when the input analog signal fluctuates, will cause the frequent saltus step of output near operating value.This comparator is introduced positive feed back by R6, makes VREF (Voltage Reference) be divided into the set upper threshold value and the lower threshold value that resets, to form an amount of return difference.When illumination by weak enhancing, when comparator inverting input signal level rise to surpass lower threshold value, comparator was failure to actuate; When illumination further strengthens, when signal level surpassed upper threshold value, comparator just moved output low level.When being reduced to upper threshold value under the illumination attenuated signal level, comparator is failure to actuate; When the further attenuated signal of illumination is lower than lower threshold value, comparator action output high level.So R6 has strengthened the ability of the anti-illumination fluctuation of circuit, has stablized circuit working.

T2, T3 form Darlington power output loop, and signal mainly attracts through R8.The character code load is connected between mouth OUT and the positive supply V+.When comparator was output as low level, T2, T3 ended, and OUT is a high level, and the character code outage is extinguished.When comparator is output as high level, T2, T3 conducting, OUT is a low level, the character code energising is lighted.D2 can be when output loop inserts inductive load, and T2, T3 be not by over-voltage breakdown in protection.R13 is the output pull-up resistor, to make things convenient for no load test.

The moving circuit of sudden turn of events speed flash by mercury switch S1, memory capacitor C 2, discharge and recharge resistance R 7 and form, memory capacitor C 2 is passed through resistance R 7 and is linked to each other with the mouth of comparator A1, mercury switch S1 one termination C2, the other end links to each other with the input end of comparator A1.When automobile urgent brake car or anxious starting, S1 all moves once.By day, the inverting input I of A1 is a high level, and the mouth Y of A1 is a low level then, and licence plate extinguishes.At this moment C2 is discharged to low level through R7, and what the memory licence plate was current extinguishes state.The S1 closing of contact when sudden turn of events speed, because the C2 both end voltage can not be suddenlyd change, so force I end level step-down, the Y end is then high, licence plate is temporarily lighted.Along with speed change is slowed down the S1 contact open, the I end recovers high level, and licence plate extinguishes as before then.At night, the I end is low level, and Y holds then high level, and licence plate is lighted.At this moment C2 charges to high level through R7, the current illuminating state of memory licence plate.S1 closure when sudden turn of events speed, because the C2 both end voltage can not be suddenlyd change, so force I end level to uprise, the Y end is then low, licence plate temporarily extinguishes.Slow down S1 with speed change and disconnect, the I end recovers low level, and licence plate is lighted as before.R3 is an isolation resistance, and the antiglare signal is close to the road by C1.Like this, no matter licence plate was bright at that time not, all flash once when all chance sudden turns of events are fast.When automobile has an accident, often with anxious parking; After having an accident, there is the situation of driving to flee the scene fast to take place again.See clearly that registration number is even more important this moment, but people might wilfully ignore this problem at this moment.Because licence plate flashes than stable state is easier and causes vision response, so this licence plate can be brought into play the special function that reminds people is paid close attention to registration number in good time.

T4, R12 form photoelectric switch overload current-limiting protection circuit.When load is overweight when making the T3 outgoing current surpass certain value, the R12 pressure drop increases, and T4 begins conducting, and the drive current that flows through R8 is shunted by T4, and the T2 electric current reduces, thereby the T3 electric current is limited in certain limit.

D3, R10, R11 form short circuit current cutting off protection circuit.Wherein D3 is the sampling stabilivolt, and R10 is a current-limiting resistance, and R11 is an isolation resistance.When output short-circuit, OUT current potential rising convergence V+, D3 punctures conducting, and T4 is saturated, and the electric current that flows through R8 is by the T4 short circuit, and T2, T3 end, thereby effectively protect the unlikely overcurrent of output circuit to burn.

R9 is a starting resistance.After normal or short circuit was eliminated when load, the limited base flow that R9 provides to T3 made T3 have a collector current that limits to flow through.This electric current forces the OUT current potential to descend by loaded impedance, so the D3 blocking-up, T4 ends, and recovers the power supply of R8 to T2.The T2 conducting, T3 is saturated, the circuit normal operation.So this circuit has short trouble to eliminate the ability that the back is recovered normal operation automatically.

D1, R14 form the prime mu balanced circuit.One can stablize the work of A1, and two can prevent the impact of automobile power source big ups and downs to prime.D4 makes polarity protection, and anti-power supply connects anti-back and damages photoelectric switch.

Referring to Fig. 4, the miniature mercury switch of sudden turn of events speed is by shell 10 in the slope of the interior end, lower end inner core 11 in the slope; Inner core is packed into behind the shell at the skewed slot 12 that forms between the two, inserts skewed slot and can be along the globule 13 of (upper and lower) motion before and after the groove; Preforming has gas guide groove 14 on inner core, the air pressure of front and back when moving with the balance globule; Two electrode outlet lines 15 of switch are embedded in the lead-in wire groove of inner core both sides, and head stretches into skewed slot and makes the switch break back contact, and middle bending is to be convenient to the location; Seal 16 after the switch assembling.Globule 13 is subjected to the force of inertia effect in automobile sudden turn of events speed process, overcome gravity and go upward to the break back contact place along skewed slot, with contacting.Inertia weakens horizontal reset under the globule of back, contact open.If want brish acceleration and anxious the deceleration that on-off signal output is all arranged, only need to get final product with two mercury switch reverse parallel connections.The thickness of mercury switch should reduce as far as possible, so that be encapsulated in the photoelectric switch module, thickness is generally answered≤6mm.

Referring to Fig. 5, E is an automobile power source among the figure.A3 is the license plate with luminous assembly, and wherein RL is the equivalent circuit of character code load, and S3 is the equivalent circuit of photoelectricity automatic switch.A2 is an operator's compartment, and wherein S0 is the total electric switch of automobile, and S2 is the licence plate try cock, also does the reserve of S3, and II is an indicator lamp, does the licence plate light on and off and shows.

Referring to Fig. 6, among the figure, the 1st, the licence plate substrate, the 2nd, concave pattern groove (or empty core word groove), the 3rd, luminous character code entity, the 4th, the prefix of luminous character code entity, the 5th, the photoelectric switch module, the 6th, the photoelectricity that stretches out module receives head, the 7th, mounting screw, the 8th, packing ring, the 9th, cover plate.

Because this licence plate has adopted technique scheme, so have following advantage:

(1) the total power consumption 4～6W of license plate with luminous compares economize on electricity more than 50% with former license plate lamp.

(2) LED tube core luminescent lifetime is tens thousand of hours, is 100 times of former licence plate bulb life approximately.

(3) license plate with luminous night visual range is 2 times of conventional licence plate night visual range greater than 40m.

(4) license plate with luminous has the moving prompt facility of sudden turn of events speed flash concurrently, and is noticeable.

(5) license plate with luminous is avoided manual operation, is not subjected to man's activity.

(6) license plate with luminous no matter illumination how, clear all the time display board is according to content.

(7) license plate with luminous does not produce dazzle, does not need exterior illumination yet.Behind the headstock equipment, solved the difficulty of seeing license number when unglazed in vehicle front clearly.This brings convenience to use, and is also favourable to traffic control.

Claims (7)

1, the automatic luminous automobile licence plate of a kind of quartz conductor, comprise licence plate substrate (1) and luminous character code, it is characterized in that having the word groove (2) of settling luminous character code on the licence plate substrate (1), embed semiconductor light emitting character code entity (3) in the word groove, the electrode leads to client of luminous character code links to each other with the mouth of photoelectricity automatic switch.

2, the automatic luminous automobile licence plate of quartz conductor according to claim 1 is characterized in that directly being processed with several the concave pattern grooves of settling luminous character code or empty core word groove (2) on monoblock licence plate substrate (1).

3, the automatic luminous automobile licence plate of quartz conductor according to claim 1 is characterized in that the independent font structure of semiconductor light emitting character code entity (3) for being made up of luminous die and transparent material; After the character code entity embedded word groove (2), its display part exceeded the licence plate base plan and forms prefix (4).

4, the automatic luminous automobile licence plate of quartz conductor according to claim 1; it is characterized in that the photoelectricity automatic switch moves circuit by photoelectricity input circuit, voltage comparator, Darlington output loop, sudden turn of events speed flash and protective circuit is formed; the photoelectricity automatic switch makes the integral structure of modular, and photoelectricity receives head (6) and stretches out the module surface.

5, according to the automatic luminous automobile licence plate of the described quartz conductor of claim 4, it is characterized in that the moving circuit of sudden turn of events speed flash by mercury switch S1, memory capacitor C 2, discharge and recharge resistance R 7 and form, memory capacitor C 2 links to each other with the mouth of comparator A1 by resistance R 7, mercury switch S1 one termination C2, the other end links to each other with the input end of comparator A1.

6, the automatic luminous automobile licence plate of quartz conductor according to claim 5, the structure that it is characterized in that mercury switch is that a skewed slot (12) is arranged in housing, a globule (13) is arranged in the skewed slot and stretch into the electrode (15) of skewed slot.

7, the automatic luminous automobile licence plate of quartz conductor according to claim 4 is characterized in that having inserted thermally dependent resistor R0 in the electro-optical tubes load circuit in the photoelectricity input circuit.

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