CS205523B1 - Headlight diffuser for motor vehicles - Google Patents

Description

The present invention relates to a headlamp diffuser for motor vehicles comprising a reflector, a diffuser and an electric light source. In this diffuser, the prism and lens system is solved such that the light and dark boundary of the light beam from the axially placed spiral of the bulb in the reflector is horizontal at the level of the arotg (0.01) above the horizontal and the intersection of the optical axis with the horizontal connected at 45 °.

Existing headlamps have a boundary of light and darkness and a light beam generally on the side of the proximal edge of the road raised from the horizontal at an angle of 15 °. The nominal vertical inclination of the headlamp thus partially reduces the visibility range, especially for distances longer than 40 m, and also creates the possibility of some dazzling the oncoming driver when cornering in the direction of the nearer edge of the road at a distance of less than 50 m.

These drawbacks are solved with the headlamp diffuser according to the invention, which is characterized in that the headlamp has three diffuser areas. The first scattering region, defined in a front view against the direction of light odu oh j j j j ý j stranu j j j j j j j j j j j j j based on 05 523

209 523 at the refracting angle is located on the side of the diffuser edge. The second scattering area delimited by the curves K ^ (R, ψ) and Kg (R, y) contains concentric wedges with a center in the center of the scattering, or with a center horizontally displaced to the side of the distal edge of the roadway. The third scattering area scattered, limited by straight lines from its center upwards at an angle of - 30 ° from the vertical, is divided radially into a series of concentric wedge-shaped zones facing upwards and provided with vertical belt wedges with bases on the proximal side of the road

The advantage of this solution is to reduce the glare of the semi-observer when driving the vehicle into a curve in the direction of the proximal edge of the road at a spacing of less than 50 m due to the horizontal reduction of the light beam 1 on the proximal edge of the road. Furthermore, this solution provides a greater geometric and photometrical distance of visibility in the direction of the nearer edge of the road, which is the main orientation element of the driver while driving, especially for distances longer than 40 m.

An illustration of the regions and its scattering elements is shown in the accompanying drawings, in which Fig. 1 is a front view of the headlight and its vertical section, and Fig. 2 is cross-sectional views A-A, B-B, C-C of the diffuser regions.

The headlamp is composed of a diffuser 2 of the reflector 2, of a bulb 6 with a filament 6 shielded by an inner lamp 2 of the bulb 2 as a source of the beam of passing light. The fiber diameter of the replacement £ Valo D is mounted in the reflector 2 before the focus so that a proximal face £ fibers from this focus is at a distance of 1 ^and ₂ face away Uruha 1 ^ ·

The front surface of the diffuser 2d® is described by the polar angle relative to the vertical of the diffuser and the polar radius R, which is determined by the angle between the headlamp axis and the focal line with the reflector point £. the inner surface of the diffuser 1 on the headlamp axis.

The first tread region Q is defined by a straight line passing through the center of the diffuser to the far side of the road at an angle of 15 ° below the horizontal of the diffuser and a curve k ^ (R,,) given by »k _x - 4 (Ε, ψ _χ )

l.sinip where R _x ((f>, 1, L) - 2f, tg (- $) - L. L + 1 _χ .οοβ ψ

... (2)

... (1)

D / 2

J3 + 1 _χ · οοβ) - arotg (arctgO

J) + I 10 OOS1

1, .in in arotgC '')

J) + 1 _χ .οοβ if)

... (3)

0.02 ψ ΐ (Ψ, 1 _χ ) - 105 ° + arosine (--——

1 _χ · β1η

IN

205 S23 where

2f + cos reflector focal length

Second tannic area

Og is determined by the curve kj and the curve kg:

kg kgCRg, φ ^l 2 ^ain ?

Eg '2f tg 1

J) + lgoos ψ2 and 90 ° - aroain

D

J) + lgooa

... (3)

... (5)

... (6)

The third tane region 0 ^ 3® is delimited by lines extending from the center of the diffuser 1 within the angles ψψ-30 °. The entire third region 0 ^ is divided into a series of concentric zones with extreme radii R ^, R ^ ^ ^. Each of the zones is vertically or radially wedged toward the upper edge of the diffuser 1 and has a refracting angle θ ^which , depending on the outer radius of the zone, is given by:

(0i -½ ^sin ^ ir 2f tg p * -l. ¹¹¹ * ³¹ 12 ¹ 0 _i + l ₂ coe (p _i

1 _? sin and arotg) + 0, pi + laooeyi? ⁰⁰⁸ Ý i ý i ⁺ lgoos y> _±

... (6)

... (7)

The first region 0 'is covered by belt wedges inclined to the vertical at an angle of 15 °, the base of which lies on the side of the edge of the glass and whose minimum breaking angle _m1lt is given as their distance from the center of the diffuser as:

r 1 _χ sin jp ^min - arotg (-) - arotg 0.0773 ... (9)

0 + 1 ^ oos ψ

The second region Og is provided with wedges concentric to the center of the diffuser 1, which have bases on the edge of the diffuser 1 and whose minimum breaking angle γ / g, depending on the polar radius Rg, is given by:

£ 2min arotg () - 0.02

... (10)

1 ₂ sin Τ 'p + igeos

For headlamps of relatively smaller exit diameter and a large reflector focal length, the center of the concentric wedges in the region Og is displaced from the center of the diffuser 1 to the far edge of the road.

In the third region 10, the individual zones 2a are provided with vertical belt wedges which have bases on the side of the proximal edge of the road and their fracture angles. are given by:

IT IS, O, O25 - £ _3vi . sin γ (12)

Claims (2)

P R fi D MEASURE OF THE INVENTION Dispersing the headlamp for a motor vehicle forming a horizontally bounded beam of light from the filament lamp axially positioned in front of the focal point of the reflector screened by the inner lamp head, characterized in that in the first area (Ο _χ ) delimited by 15 ° and the curve k _x k ^ (R ^, _χ ), where R _x (1f, 1 _χ , L) - 2f.tg (- ~ -) 1 _χ .β1η + 1 _χ .βοβ D / 2 _ P + 1- .oos Ψ 0.02. (ψ, 1.) 105 ° + arosine (—- ft .-- 2-) - arotg (-—— ¹ l ¹ lsin (p l..sin (/ 'arotg (π X) arotgCi - ) +1 _χ .οοβ (^> J) + 1 _{χ .οοβ} a strap wedges inclined at 15 ° to the vertical diffuser, the bases on the side edges of the diffuser and a minimum jejiohž frangible angle ^t ^ l ^ min ^E * 1 min 1 i - arotgC l * ^aln ΐ _} γ + 1 _χ .οοβ arotg (0.0773) in the second region (Og) of the diffuser defined by the curve k ^ í R ^, ^ _χ ) and the curve kg where kg (Rg, g ) R, «f, 1> 2 <? ψ lg.sin (/ 1 (L) - 2f.tg (- * -) - L. —S-L ² 2 0+ lg.oos ψ 25.D lg) 90-arosine (R + lg · oos) 205 523 is provided with concentric wedges centered on its center, or centered horizontally on the side of the far side of the road, with bases on the side of the adjacent edge of the diffuser (1) and a minimum breaking angle (£ / g _min ) min arctg (- lg. sin / ¹ + lg 0.02 and in the third region (0 ^) delimited by lines extending upwards from its center at an angle of 30 ° with respect to the vertical, divided by radii (R ^) into a series of conoentricular zones (0 ^) whose bases are dispersed at the upper edge (1) and breaking angle (63 ^) arotg (lg.sin ıi + ^ .OOS ^) + 0,01 D / 2.COS ýi ⁺ is provided with vertical belt wedges with bases on the side of the proximal edge of the road with breaking angle (63) ^) _0.025- ? _3vl.sin ^ where φ? H ^ 2D L * i »2.3 62 & 3vl & 3Hi polar angle relative to the diffuser vertical (1) headlamp and focal line angle and reflection point Q reflector angle (2) distance of filament front (4) from reflector focus (2) distance of proximal filament front (4) from reflector focus ( 2) diameter of the filament replacement body (4) of the bulb (3) projection of the connector (QS) of the reflector point of the reflector (2) with the refractive diffuser point (1) the polar diffuser radius (1) 1) refracting angle of prism in region (Og) of diffuser (1) refracting angle of vertical i-th conoentric zone in region (0 ^) of diffuser (1) refracting angle of vertical prism in region (0 ^) of diffuser (1) ² 2 drawings 205 523 RE2 Q-Q Q Q -> Giant. and REZ A-A REZ 8-B REZ C-C Giant. of REPAIR description of the invention to the author's certificate S. 205 525 Int. Cl? B 60 Q 1/24 In the description of the invention for the author's certificate No. 205 523, several reference numerals have been misprinted. Correct: pages 5,2 and 2> - relationship (2) _Λ V Λ l.sin ^ f W (1): (III) -L. y- ₊ ---- _{a (f} page 4, line 6 ..... with reflector shaded .... page 4, order 9 k- ^ = k ₁ ( INVENTORY AND DISCOVERY OFFICE