Stable high-brightness high-mount stop lamp

Abstract

The invention discloses a stable and high-brightness high-mount stop lamp which comprises a lamp shell, a lampshade, a light guide, a PCBA and a driving circuit board. According to the stable and high-brightness high-mount stop lamp adopting the technical scheme, by arranging the strip-shaped upper reflecting surface and the strip-shaped lower reflecting surface, more light generated by diffuse reflection of the light guide tooth strip can be concentrated to the strip-shaped light emitting surface to be emitted outwards, the light utilization rate is greatly improved, LED lamp beads with small power can be adopted, the manufacturing cost is reduced, and the stable and high-brightness high-mount stop lamp is suitable for large-scale popularization and application. The light guide uses fewer materials compared with a traditional structure, so that the manufacturing cost is further reduced; and moreover, the PCBA is directly mounted on the light guide positioning plates at the two ends of the light guide, so that an intermediate link is eliminated, the tolerance is greatly reduced, and the accuracy of the relative position of the LED lamp bead and the light inlet end surface of the light guide is high, thereby improving the optical stability of the high-mount stop lamp, reducing the requirement on assembly precision and improving the assembly efficiency.

Description

technical field [0001] The invention relates to the technical field of automobile lamps, in particular to a stable and bright high-position brake lamp. Background technique [0002] The high-mounted brake light is installed on the upper part of the rear of the car to warn the following vehicles, so as to avoid rear-end collisions. At present, the mainstream high-mount brake lights are LED lamps. [0003] See figure 1 , the axial cross-section of the light guide of the existing high-mounted stop lamp is usually circular, but whether it is the national standard GB, or the European standard ECE or the American standard FMVSS, it is stipulated that the light-emitting angle of the high-mounted stop lamp is 10° above the horizontal line to 5° below the horizontal line °, and because the axial cross-section of the existing high-mounted brake light is circular, a large amount of light generated by the diffuse reflection of the light guide teeth will be emitted beyond the range req...

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Problems solved by technology

[0003] See figure 1 , the axial cross-section of the light guide of the existing high-mounted stop lamp is usually circular, but whether it is the national standard GB, or the European standard ECE or the American standard FMVSS, it is stipulated that the light-emitting angle of the high-mounted stop lamp is 10° above the horizontal line to 5° below the horizontal line °, and because the axial cross-section of the existing high-mounted brake light is circular, a large amount of light generated by the diffuse reflection of the light guide teeth will be emitted beyond the range required by the regulations, resulting in a large amount of waste of light, and the utilization of light The low efficiency can only be compensated by increasing the power of LED lamp beads, which increases the manufacturing cost

[0004] Moreover, the light guide and PCBA of the existing high-mounted brake light are installed on the housing. Therefore, there are two links in the position tolerance of the LED lamp beads on the PCBA relative to the light guide, namely: the cooperation between the light guide and the housing and the coordination between the PCBA and the light guide. There are tolerances in the fit of the shell, and the cumulative tolerance of the two links is large, which will lead to poor control of the position of the LED lamp bead relative to the light guide in subsequent actual production, and poor optical stability

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