TW201706535A - Car lamp with brightness contrast lighting pattern capable of providing larger brightness contract for projected lighting pattern - Google Patents

Abstract

The present invention discloses a car lamp with brightness contrast lighting pattern, which comprises a light guide tube having two ends formed thereon a light input plate and a light output portion, wherein the light guide tube is provided with a light refraction groove formed on one side of the bottom in front of the light output portion and the light refraction groove is provided with a long inclined plane and a short inclined plane; a projection lens having a light input plane opposite to the light output portion of the light guide tube and a curved light output surface; and a light emitting body for projecting an initial light source on the light input plate opposite to the light guide tube. The light guide tube guides a portion of the light to the projection lens for projecting the lighting pattern with a brightness cut-off line, and the long inclined plane of the refraction groove guides another portion of the light to a partial area of the lighting pattern for overlapping and irradiation. Thus, without losing the existed light energy, the present invention enlarges the brightness contract of the left and right bright areas of the lighting pattern so as to satisfy more severe regulation requirement and avoid the assembly complexity of car lamp parts and the increase of weight, thereby achieving multi-progress for light-weight structure effect.

Description

Headlights with light and dark contrast

The invention relates to the technical field of a lamp, in particular to an innovative inventor of a lamp having a concave structure on a light pipe to achieve a large light-dark contrast of the projected light shape.

Recently, in order to improve driving safety, the illumination light shape design of automobile lamps is gradually required to improve the contrast of illumination; generally, the design of the reflection surface can gather the light spots to the side, so that it can be overcome, but the light guiding technology using the light guide tube It will be more uniform, and it is not easy to achieve the effect that the light shape is not bright, and it is difficult to meet the regulatory requirements, even the internal rules of the lamp factory.

For example, the Republic of China Announcement No. I338637, and the new patent of "Lights" of No. 97151169, whose structure is as described in the abstract: the vehicle lamp uses a light-emitting element as an initial light source and a light guiding element to calculate the initial light source. a diverging angle and a light emitting area of the divergence angle, and a lens element for improving light extraction efficiency of the light emitting element for generating a light source having a predetermined light shape and high light extraction efficiency, and then lifting the light source through a projection element The light contrast allows the headlight to project a high contrast cut-off line. In addition, since one of the light-emitting surfaces of the light-emitting element can be designed to have a predetermined shape, a light beam having a predetermined shape can be projected without using other optical elements, thereby effectively improving the light utilization efficiency of the light.

However, as shown in the fifth figure, according to the aforementioned I338637 "car A light path diagram of the light-emitting element and the light-guiding element of the lamp, that is, the light-incident surface of the light-guiding element of the reference is connected to the light-emitting surface of the light-emitting element, and after receiving the initial light source, the light-guiding element passes through the light collection and the rule The guiding of the sex is still an average outward projection. Although the light guiding element enhances the light utilization efficiency, it does not change its light shape and light and dark contrast.

As shown in the sixth figure, the illumination light shape a projected by the light guiding path of the light guiding element and the light intensity distribution curve b of the horizontal dimension are shown, although the illumination light shape a of the sixth figure is visually ugly. What is the difference between the left and right light and dark, but the light intensity distribution curve b of the horizontal dimension in the figure shows a gentle curve distribution, showing that the contrast between the left and right light and dark of the illumination light shape a is small, and cannot meet the stricter regulatory requirements.

Although the design of the lamp can be matched with a specific shape of the light shielding sheet, the light emitted by the light emitting element is blocked by the light shielding film, and only part of the light is projected from the projection lens in parallel to a section conforming to the regulations. The beam of shape. However, as a result of the visor, the overall light utilization efficiency will be lowered, which is one of the disadvantages of the conventional lamp structure.

Moreover, the additional light shielding sheet on the existing structure of the lamp further causes structural and assembly complexity, and the weight is increased, which is the second disadvantage.

Therefore, how to use the visor structure for the conventional lamp structure to reduce the light energy loss and reduce the light utilization efficiency, and further increase the complexity and weight of the structure, and the use of the conduit to improve the light utilization efficiency, but it is difficult to modulate the energy distribution. Innovative inventors are the difficult points to solve in this case.

The main object of the present invention is to provide a light and dark contrast light shape The headlights can widen the contrast between the left and right bright areas of the projected light shape without losing the energy of the existing light, in order to meet the stricter regulatory requirements and achieve better progress.

A second object of the present invention is to provide a lamp having a light-dark contrast light shape, which provides a refractive microstructure through the surface of the light guide body, thereby avoiding an increase in the complexity and weight of the assembly of the lamp, and having a lightweight structure. The winner.

In order to achieve the above objects and effects, the present invention has a light-dark contrast light-shaped lamp, which mainly comprises: a light guide tube having a light-incident surface at both ends and a light-emitting portion, the light guide tube is on the bottom surface before the light-emitting portion One side of the light-receiving groove has a long inclined surface and a short inclined surface, and the long inclined surface is located on a side adjacent to the light-incident surface.

A projection lens has a light incident surface and an arc light exit surface, and the light incident surface is opposite to the light exit portion of the light guide tube.

And an illuminant projecting an initial light source on the light incident surface of the light guide tube, the light guide tube guiding part of the light to the projection lens to project an illumination light shape having a cut-off line, and the long inclined surface of the light-refractive groove Another part of the light is directed to the partial area of the illumination light, and the left and right brightness of the illumination shape is contrasted.

A further technical feature of the present invention is that the light guiding tube includes a light guiding portion and is connected to the light emitting portion, and the opposite end of the light guiding portion that is connected to the light emitting portion is the light incident surface, and the peripheral side of the light guiding portion has an upper portion a light guiding surface, a lower light guiding surface, and two side light guiding surfaces connecting the upper light guiding surface and the lower light guiding surface, wherein the light guiding groove is located at one side of the lower light guiding surface, and the lower light guiding surface is on the side of the light guiding groove a light guiding rib is disposed, and a light guiding slope is disposed between the other side of the light folding groove and the light guiding surface of the one side, the light guiding inclined surface makes the cutoff line of the illumination light shape more flat, and the light guiding rib makes The cut-off line has a slanted section.

A further technical feature of the present invention is that the refracting groove of the illuminant is The distance between the light exiting portions is greater than 0.5 mm, the depth of the light reflecting groove is less than two thirds of the thickness of the light guiding portion, and the length of the long inclined surface of the light reflecting groove is larger than the short inclined surface.

A further technical feature of the present invention is that the light exiting portion has a hemispherical structure and has a spherical light emitting surface.

A further technical feature of the present invention is that the projection lens is provided with two light guiding grooves on the light incident surface, and the two light guiding grooves make the cutoff line of the illumination light shape more flat.

[study]

a‧‧‧Lighting shape

b‧‧‧Light intensity distribution curve in horizontal dimension

〔this invention〕

(1) ‧‧‧Light pipe

(11)‧‧‧Into the glossy surface

(12) ‧‧‧Lighting Department

(121)‧‧‧Spherical glazing

(13) ‧ ‧ refracting groove

(131)‧‧‧Long bevel

(132)‧‧‧Short bevel

(14) ‧‧‧Light Guide

(141) ‧‧‧Upper glossy

(142) ‧ ‧ lower light guide

(143)‧‧‧ Side light guide

(144)‧‧‧Light guide ribs

(145)‧‧‧Light guiding bevel

(2) ‧ ‧ illuminators

(3)‧‧‧Projection lens

(31)‧‧‧Into the glossy surface

(32)‧‧‧Arc-shaped illuminating surface

(33)‧‧‧Light guide groove

(A) ‧‧‧Lighting patterns

(A1) ‧ ‧ cut-off line

(A2) ‧ ‧ sloping section

(B) ‧‧‧Light intensity distribution curve in horizontal dimension

(C) ‧‧‧Distance between the refracting groove and the light exiting part

(D) ‧ ‧ thickness of light pipe

The first figure is an exploded perspective view of the present invention.

The second figure is a schematic cross-sectional view of the light pipe of the present invention.

The third figure is a schematic diagram of the light guiding path of the light guiding tube of the present invention.

The fourth figure is the illumination light shape (A) projected by the light guiding path of the light guide tube of the present invention. Schematic diagram of the light intensity distribution curve (B) of the horizontal dimension.

The fifth figure is a schematic diagram of the light path shown by the light-emitting element and the light-guiding element of the "light" of the aforementioned I338637.

The sixth figure is a schematic diagram of the illumination light shape a projected by the light guiding path of the light guiding element and the light intensity distribution curve b of the horizontal dimension.

In order to achieve the above objects and effects, and the technical means and configurations employed, the features and effects of the embodiments of the present invention are described in detail with reference to the accompanying drawings.

Please refer to the first and second figures for an exploded perspective view of the present invention and a schematic cross-sectional view of the light guide tube of the present invention. The present invention has a light-dark contrast light-shaped vehicle lamp, including: A light guide tube (1) has a light incident surface (11) at both ends and a light exiting portion (12). The light guide tube (1) is provided with a light-reducing groove on the bottom surface side before the light exit portion (12) ( 13) The refractive groove (13) has a long inclined surface (131) and a short inclined surface (132), and the long inclined surface (131) is located on a side adjacent to the light incident surface (11).

A projection lens (3) has a light incident surface (31) and an arcuate light exit surface (32), and the light incident surface (31) is opposite to the light exit portion (12) of the light guide tube (1).

And an illuminant (2), projecting an initial light source on the light incident surface (11) of the opposite light pipe (1), and guiding the light to the projection lens (3) through the light guide tube (1) to project a cutoff The illumination shape of the line (A, see the fourth figure), and the long bevel (131) of the refractive groove (13) guides another part of the light to be superimposed and irradiated toward a partial area of the illumination light to make the illumination shape The brightness forms a large contrast between light and dark.

In the above first figure, the projection lens (3) of the present invention is provided with two light guiding grooves (33) on the light incident surface (31), and the two light guiding grooves (33) make the illumination light shape (A, see The cut-off line (A1, see figure 4) of the fourth picture) is more flat. In addition, the light guiding tube (1) includes a light guiding portion (14) and is connected to the light emitting portion (12), and the opposite end of the light guiding portion (14) that is connected to the light emitting portion (12) is the light incident surface (11). The light guide portion (14) has an upper light guiding surface (141), a lower light guiding surface (142), and two sides connecting the upper light guiding surface (141) and the lower light guiding surface (142). The light guiding surface (143) is located on one side of the lower light guiding surface (142), and the lower light guiding surface (142) is provided with a light guiding rib on the side of the light folding groove (13). And a light guiding slope (145) is disposed between the other side of the light-receiving groove (13) and the one side light guiding surface (143), and the light guiding inclined surface (145) cuts the brightness of the illumination light shape (A) The line (A1) is flatter, and the light guiding rib (144) causes the cut-off line (A1) to have a sloped section (A2, see figure 4). As shown in the second figure, the distance (C) between the light-receiving groove (13) of the illuminant (2) and the light-emitting portion (12) is greater than 0.5 mm; in addition, the depth of the refracting groove (13) is smaller than the light guide. Two-thirds of the thickness (D) of the portion (14); and, the refraction The length of the long inclined surface (131) of the groove (13) is larger than the short inclined surface (132), so that the light does not directly leak from the refractive groove (13) to cause loss of light energy or cause stray light. Further, the light exiting portion (12) has a hemispherical structure and has a spherical light emitting surface (121).

The third figure is a schematic diagram of the light guiding path of the light guiding tube of the present invention, that is, the light incident surface (11) of the light guiding tube (1) of the present invention is introduced into the initial light source projected by the illuminant (2), and the light guiding tube (1) is guided. A part of the light is led to the light exiting portion (12), and then guided to the projection lens (3), and an illumination light shape (A) having a cut-off line (A1) is projected (as shown in the fourth figure). The illumination light shape can be obtained by guiding the two light guiding grooves (33) provided on the light incident surface (31) with the light guiding inclined surface (145) of the light guiding portion (14) by the projection lens (3). The light-off cut-off line (A1) is flatter; and the light-guiding rib (144) causes the cut-off line (A1) to have a slope change of the inclined section (A2) to meet regulatory requirements (15 degrees or 45 degrees). Moreover, the long bevel (131) of the light-reducing groove (13) guides another portion of the light to be superimposed and irradiated toward a partial area of the illumination light shape (A), so that the left and right brightness of the illumination light shape (A) form a large light and dark. Contrast; that is, the creation structure can enlarge the gap between the left and right bright areas of the projected light shape without losing the existing light energy, in order to meet the stricter regulatory requirements and achieve better progress.

As shown in the fourth figure, the illumination light shape (A) projected by the light guiding path of the light guide tube and the light intensity distribution curve (B) of the horizontal dimension are shown in the figure, and the illumination light shape (A) shown in the figure can already be Visually, the difference between left and right light and dark is seen, and the light intensity distribution curve (B) of the horizontal dimension displayed by the lower side presents a steep curve distribution, and the left and right contrast ratios of the illumination light shape (A) are larger.

As described above, the light guide tube (1) of the present invention guides a part of the light of the initial light source to the light exit portion (12) to project an illumination light shape (A); and the light guide tube (1) is on the bottom side. The microstructure of the long bevel (131) of the refractive groove (13) is arranged to guide another portion of the light to be superimposed and irradiated toward a partial region of the illumination light shape (A) without losing the existing light energy. The left and right brightness of the illumination light shape (A) is formed to have a large contrast between light and dark to meet stricter regulatory requirements, and the complexity and weight of the assembly of the lamp parts can be avoided, and the structure lightweight effect can be achieved multiple times. Progressive achiever.

The above is only a preferred embodiment for explaining the present invention, and is not intended to limit the invention in any way, so that any modifications relating to the present invention are made in the spirit of the same invention. And the changer, other types that can be implemented and have the same effect, should still be included in the scope of the intention of the present invention.

In summary, the "lights of the light and dark contrast light" of the present invention is practically and cost-effectively required to fully meet the needs of industrial development, and the disclosed structural invention is also an unprecedented innovative structure. Therefore, its "novelty" should be undoubtedly considered, and the invention can be more effective than the conventional structure, and therefore has "progressiveness", which fully complies with the requirements of the application requirements of the invention patents of the Chinese Patent Law. File a patent application and ask the bureau to review it early and give it affirmation.

(1) ‧‧‧Light pipe

(11)‧‧‧Into the glossy surface

(12) ‧‧‧Lighting Department

(121)‧‧‧Spherical glazing

(13) ‧ ‧ refracting groove

(131)‧‧‧Long bevel

(132)‧‧‧Short bevel

(14) ‧‧‧Light Guide

(141) ‧‧‧Upper glossy

(142) ‧ ‧ lower light guide

(143)‧‧‧ Side light guide

(144)‧‧‧Light guide ribs

(145)‧‧‧Light guiding bevel

(2) ‧ ‧ illuminators

(3)‧‧‧Projection lens

(31)‧‧‧Into the glossy surface

(32)‧‧‧Arc-shaped illuminating surface

(33)‧‧‧Light guide groove

Claims (5)

A light having a light-dark contrast light shape, comprising: a light guide tube having a light-incident surface at both ends and a light-emitting portion, wherein the light-guiding tube is provided with a light-receiving groove on a bottom surface side before the light-emitting portion, the light-receiving groove The utility model has a long inclined surface and a short inclined surface, the long inclined surface is located on a side adjacent to the light incident surface; a projection lens has a light incident surface and an arc light exit surface, and the light incident surface is opposite to the light exit portion of the light guide tube; And an illuminant projecting an initial light source on the light incident surface of the light guide tube, the light guide tube guiding part of the light to the projection lens to project an illumination light shape having a cut-off line, and the long inclined surface of the light-refractive groove Another part of the light is directed to the partial area of the illumination light, and the left and right brightness of the illumination shape is contrasted. The illuminating light having a light-dark contrast light shape according to claim 1, wherein the light guiding tube includes a light guiding portion and is coupled to the light-emitting portion, and the opposite end of the light guiding portion connecting the light-emitting portion is the light-incident surface. The peripheral side of the light guiding portion has an upper light guiding surface, a lower light guiding surface, and two side light guiding surfaces that are connected to the upper light guiding surface and the lower light guiding surface, and the light folding groove is located at one side of the lower light guiding surface, The lower light guiding surface is provided with a light guiding rib on the side of the light folding groove, and a light guiding slope is arranged between the other side of the light folding groove and the light guiding surface of one side, and the light guiding slope makes the light and dark cutoff line of the illumination light shape It is flatter, and the light guiding ribs have a slanted section for the cut-off line. The light having a light-dark contrast light shape according to claim 2, wherein a distance between the light-receiving groove of the illuminant and the light-emitting portion is greater than 0.5 mm, and the depth of the light-receiving groove is less than two-thirds of the thickness of the light guide portion. And the length of the long slope of the light-refractive groove is larger than the short slope. A light having a light-dark contrast light shape according to claim 1, wherein the light-emitting portion has a hemispherical structure and has a spherical light-emitting surface. A lamp having a light-dark contrast light shape according to any one of claims 1 to 4, The projection lens is provided with two light guiding grooves on the light incident surface, and the two light guiding grooves make the cutoff line of the illumination light shape more flat.