CZ280915B6 - Signal lamp - Google Patents

Abstract

The lamp reflector (1) is composed of axially offset paraboloidal reflective segments (11, 12, 14, 15), of which the lower segments (12, 14) are interconnected by a cylindrical or conical reflecting surface (13), with focal points (F.sub. 1.n., F.sub.2, F.sub.5, of the reflection segments (11, 12, 15) coincide with a light source (4), and a focus (F.sub.4.n) ) of the segment (14) is on the apex side of the reflector (1) at a distance (df) and the internal refractor (2) is provided with a Fresnel lens (21) and the external refractor (3) is dispersing elements (31).

Description

Signal lamp

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a signal lamp, in particular for motor vehicles, in which a reduction in its color contrast and an increase in light efficiency and lateral visibility are provided.

BACKGROUND OF THE INVENTION

Conventional lamps use a color optical signal, which is provided by a colored outer cover, to provide signaling of the direction of change or acceleration of the vehicle. However, its color does not generally have to be coordinated with the color of the vehicle body and, in particular when mounted near the headlamp, can produce a high color contrast and thus impair visual comfort. The reflector of conventional lamps is in the form of a continuous paraboloid, which in a certain mounting space reduces the lateral visibility of the signal lamp and its luminous efficiency.

SUMMARY OF THE INVENTION

These drawbacks are eliminated in the signal lantern according to the invention, the reflector of which is composed of axially offset paraboloid segments with different focal length values, which allow an increase in luminous efficiency and improved lateral visibility of the illuminating surface of the lantern. The color filter consists of an internal refractor equipped with a Fresnel lens, and the color mismatch is suppressed by an external colorless refractor. The refractor is provided with spherical-shaped diffusing elements which create the width of the light signal beam and return the light coming from the outside to the signal lamp, thereby reducing the saturation of the color tone of the outer surface of such a lamp. It also suppresses phantom return images that could reduce the speed and likelihood of identifying the correct lamp signaling.

Overview of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical cross-sectional view of the signal lamp; FIG. 2 is a horizontal cross-section of the lamp; and FIG. 3 is a front view of the lamp.

DETAILED DESCRIPTION OF THE INVENTION

In Figs. 1, 2 and 3 there is a signal lamp composed of a reflector 1, a colored inner refractor 2, a colorless outer refractor 3 and a light source 4. The reflecting surface of the reflector 1 is composed of axially offset paraboloid segments 11, 12, 14, 11 15 with a common axis of rotation forming a curve from the upper paraboloid segment 11, the lower left paraboloid segment 12 and the lower right paraboloid segment 14, which are connected by a cylindrical or conical surface 13, and the lateral paraboloid segment 15, which is axially at least raised, thereby ensuring good lateral visibility of the lamp. The cylindrical or conical surface 13 reflects light on the upper paraboloid segment 11 that is

-1GB 280915 B6 directs into a useful working area, thereby increasing the luminous efficiency of the lamp.

For the focal lengths of the upper paraboloid segment 11, the focal length f _{2 of the} lower left paraboloid segment 12, the focal length f _{4 of the} right lower paraboloid segment 14, and the focal length f _{5 of the} side paraboloid segment 15 of the reflector 1 is ^f 4 ^<f 2 ^<f l ^<f 5 '

The upper paraboloidal segment 11 and bottom paraboloidal segment 12 of the left, right bottom paraboloidal segment 14 and side paraboloidal segment 15 are thereby defined by radial planes successive axis x of the lamp and forming an angle with the horizontal of 2 ° θι ~ ^vell bone 30 ° to 60 °. The foci of the upper paraboloid segment 11, the focal point F _{2 of the} lower left paraboloid segment 12 and the focal point F _{5 of the} side paraboloid segment 15 coincide with the center of gravity of the light source 6 and the focal point F _{4 of the} right lower paraboloid segment 14 is df, from the light source 4 defined in the viewing direction, the external colorless refractor 4 - the light source 4 - the reflector 6, where the distance df is equal (0.25 to 0.75). f ₄ .

The beam of light from the lower right paraboloid segment 14 is thus raised and is not shielded by vehicle body mounts or fixtures that may be located on the underside of the lamp.

In this example, the inner color refractor 2 is provided with a Fresnel lens 21 on the side facing the light source 6 in the central region about the x-axis of the lamp, which directs direct light coming from the light source 6 to the useful working space of the lamp. The colorless outer refractor 6 is provided with spherical diffuser elements 31 of radius R whose width T is equal to (0.3 to 3). R and the height H is equal to (0.1 to 1). R.

Industrial applicability

The signal lantern according to the invention can be used in motor vehicle lighting systems, in particular in front direction indicator lamps for automobiles.

Claims (4)

PATENT CLAIMS Signal lantern composed of a reflector, an internal and an external refractor and a light source, characterized in that the reflector (1) has a reflecting surface composed of an upper paraboloid segment (11) with a focal length (ff) of the left lower paraboloid segment (12) focal length (f ₂ ), right lower paraboloid segment (14) with focal length (f ₄ ), and lateral paraboloid segment (15) with focal length (f ₅ ), the lower paraboloid segments (12, 14) being connected by a cylindrical or conical a reflective surface (13) and for focal lengths (f _lr f ₂ , f ₄ f ₅ ) of the paraboloid segments (11, 12, 14, 15) of the reflector (1), f ₄ <f ₂ < ^f i <f ₅ a the paraboloid segments (11, 12, 14, 15) are radially delimited by planes passing the axis (x) of the lamp and enclosing an angle (θ ^ ₂ ) of magnitude (θ ^ ₂ ) with the horizontal (z) 30 ° to 60 °, the inner refractor (2) being colored and the outer refractor (3) being colorless. Signal lantern according to claim 1, characterized in that the focus (Ff) of the upper paraboloid segment (11), the focus (F ₂ ) of the left lower paraboloid segment (12) and the focus (F ₅ ) of the side paraboloid segment (15) of the reflector (1) ) coincide with the center of gravity of the light source (4) and the focal point (F ₄ ) of the right lower paraboloid segment (14) is at the top of the reflector (1) at a distance (df) from the light source (4) (df) is equal (0.25 to 0.75). f ₄ . Signal lantern according to claim 1, characterized in that the inner color refractor (2) is provided with a Fresnel lens (21) in the central region around the axis (x) of the lantern. Signal lantern according to claim 1, characterized in that the external colorless refractor (3) is provided with scattering elements (31) of spherical shape, their width (T) being equal to -3GB 280915 B6 (0.3 to 3). R and height (H) is equal to (0.1 to 1). R de (R) is the sphere radius of the scattering elements (31).