Brake light controller with functions of sparkling and making sound to alert filament disconnection

Abstract

The invention relates to a brake light controller with functions of sparkling and making sound to alert filament disconnection. The brake light controller comprises three functional modules, namely an oscillation circuit, a timing circuit and a drive and sound alert circuit. The oscillation circuit is controlled by logic level signals of the timing circuit to determine to output square waves or fixed level signals to the drive and sound alert circuit. The timing circuit uses an internal delay circuit for timing, outputs a logic level to the oscillation circuit to allow the same to output square signals before timing ends, and outputs an inverted logic level to the oscillation circuit to allow the same to output fixed level signals after timing ends. The drive and sound alert circuit determines to allow the brake light body to be on or off according to the logic level output by the oscillation circuit and makes no alert sound when a filament is in good condition and allows the circuit to make alert sound when the filament is disconnected. By adopting the brake light controller, the brake light sparkles before constantly lights up when a brake pedal is pressed, a driver in a car behind can be alerted, and alert sound is made when the filament is disconnected.

Description

technical field [0001] The invention relates to a brake light controller for a motor vehicle, in particular to a brake light controller with functions of flickering light and reminding filament disconnection with sound. Background technique [0002] Car rear-end collision is a high traffic accident, so brake lights are particularly important for the warning function of the rear car. The warning function of brake lights includes warning effect (or efficiency) and the driver's timely knowledge of the failure of the car's brake lights. Prior patents have proposed some solutions for this. [0003] Chinese patent application number is that the file of 97246593.6 has announced a kind of automobile brake light device, on the automobile brake light that is made up of brake pedal 1, brake switch K1, red brake tail light L1, on brake pedal 1 device, a A secondary vehicle brake light device consisting of a pre-brake micro-sensor switch K2, a yellow pre-brake light L2 and a control cir...

AI Technical Summary

Problems solved by technology

The disadvantage is that it is not convenient to install the light-emitting diodes described in the document on the finalized car, and it does not include the brake light damage warning function; by the way, it is pointed out that the details of the technical solution published in the patent document are not true, such as IC (that is, 555 time base circuit) The pin number is incorrect, and the freewheeling diode is not connected to both ends of the relay coil

[0009] The Chinese patent application number is 200520112630.4, which discloses an intelligent car brake light changing device, which can effectively distinguish between normal braking and emergency braking. During emergency braking, the brake light is flashing, and the emergency braking signal is from the anti-lock braking system circuit. Extracted, the disadvantage is that more components are used, even up to three IC integrated circuits, which reduces the reliability of the circuit, and the device does not include a brake light damage warning function

However, the brake light should not flash continuously for a long time, otherwise it will easily cause visual fatigue to the driver behind. Therefore, it is advisable to use the method that the brake light changes from a short flash to a constant light after the brake pedal is stepped on until the brake light is off after the brake pedal is released. Frequent switching is easy to damage the filament, so the brake light failure alarm function to remind the driver to replace the bulb is extremely important for safe driving

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