CN-117006440-B - Car light device

Abstract

A vehicle lamp device comprises a substrate unit, a light-emitting unit and a light guide element. The light-emitting unit is arranged on the substrate unit and can project light to the left. The light guide element comprises a light emitting part and a light reflecting part which are arranged in front of each other, and a light entering part which is connected between the light emitting part and the light reflecting part and faces the light emitting unit. The light emergent portion is provided with a plurality of light emergent surfaces which are arranged left and right and are backwards convex. Each light-emitting surface defines a real focus located in front of the light-reflecting portion. The light reflecting portion is formed with a plurality of light reflecting surfaces which are arranged left and right and protrude toward the inner side of the light guiding element. Each reflecting surface defines a virtual focus overlapping with a corresponding real focus, and can make the extension line of the light rays meet at the virtual focus and reflect back towards the corresponding light emitting surface. The invention forms the virtual light source positioned at the real focus of the corresponding light emergent surface by each light reflecting surface, and has the characteristic of being capable of concentrating light in the light distribution effective area.

Inventors

• SHI MINGZHI

Assignees

• 堤维西交通工业股份有限公司

Dates

Publication Date

20260512

Application Date

20220429

Claims (9)

1. 1. The car lamp device is suitable for projecting light backwards and comprises a substrate unit, a light emitting unit arranged on the substrate unit and a light guiding element, wherein the light emitting unit can provide light projected in the left-right direction, the light guiding element comprises a light guiding body extending leftwards and rightwards, the light guiding body comprises a light emitting part and a light reflecting part which are arranged backwards and forwards, and a light entering part which is connected between the light emitting part and the light reflecting part and faces the light emitting unit, the light emitting part is provided with a plurality of left-right arranged light emitting surfaces, each light emitting surface can be used for allowing light to be emitted backwards from the light guiding body of the light guiding element, and the light guiding element is characterized in that the convex surface of each light emitting surface faces backwards and defines a real focus which is positioned in front of the light reflecting part, the light reflecting part is provided with a plurality of light reflecting surfaces which are arranged leftwards and rightwards and are arranged towards the inner side of the light guiding element, each light reflecting surface is positioned in front of a corresponding light emitting surface, and defines a virtual focus which is overlapped with a corresponding light emitting surface and can be reflected backwards and is formed towards the virtual focus of the light guiding element.
2. 2. The lamp device according to claim 1, wherein the light-emitting portion includes a first light-emitting segment extending obliquely from front to back away from the light-reflecting portion, and a second light-emitting segment extending obliquely from back to front toward the light-reflecting portion from the first light-emitting segment, the light-emitting surface being formed on the first light-emitting segment and the second light-emitting segment, and the light-reflecting portion being connected to the second light-emitting segment extending obliquely from front to back toward the second light-emitting segment from the light-incident portion.
3. 3. The lamp device according to claim 1, wherein the width direction of each light-emitting surface is in the same direction as the left-right direction, the length direction of each light-emitting surface is in the same direction as the up-down direction, the convex surface of each light-emitting surface protrudes backward from the outside of the light guide element, the length direction of each reflecting surface is in the same direction as the up-down direction, the width direction of each reflecting surface is in the same direction as the oblique direction, the oblique direction and the front-back direction define an oblique angle of 35-70 degrees, and each reflecting surface protrudes inward of the light guide element along the protruding direction intersecting the oblique direction, and the protruding direction and the front-back direction define an oblique angle of 35-70 degrees.
4. 4. The lamp device defined in any one of claims 1-3, wherein each of the reflective surfaces is a total internal reflection surface and defines a respective one of the virtual foci.
5. 5. The lamp device of claim 4, wherein the virtual foci are aligned in a line.
6. 6. The lamp device of claim 1, wherein the light guide member further comprises two light guide wings protruding from upper and lower sides of the light guide body in opposite directions, respectively, each of the light guide wings comprising a front facing saw tooth surface and a rear facing plane.
7. 7. The lamp device of claim 6, wherein the light guide member further comprises two cover bodies respectively covering the outside of the light guide side wings in the up-down direction, each of the cover bodies comprises a main cover portion covering a corresponding one of the light guide side wings in a left-right extending manner, and an extending portion extending forward from a central portion of the main cover portion, each of the extending portions has a V-shape opening toward the other extending portion, and extends forward to the front of one of the light reflecting surfaces.
8. 8. The lamp device according to claim 1, wherein the light-incident portion is formed with two light-collecting structures arranged in a front-to-rear direction and facing the light-emitting unit, and the light-emitting unit includes two light sources arranged in a front-to-rear direction on the substrate unit, each of the light sources being capable of providing light incident on a respective one of the light-collecting structures.
9. 9. The vehicle lamp device according to claim 1, wherein: the light emitting unit comprises two light sources arranged on the substrate unit in a front-back arrangement, the light emitting part comprises a first light emitting section which extends obliquely from front to back and away from the light reflecting part, and a second light emitting section which extends obliquely from back to front and towards the light reflecting part, the light emitting surfaces are formed on the first light emitting section and the second light emitting section, the width direction of each light emitting surface is the same as the left-right direction, the length direction of each light emitting surface is the same as the up-down direction, the convex surface of each light emitting surface protrudes from front to back towards the outer side of the light guiding element, one real focus is defined, the light reflecting part extends obliquely from front to back towards the second light emitting section from the light entering part and is connected with the second light emitting section, the length direction of each reflecting surface is in the same direction as the up-down direction, the width direction of each reflecting surface is in the same direction as the oblique extending direction, the oblique extending direction and the front-back direction define an oblique extending included angle of 35-70 degrees, each reflecting surface is a total internal reflecting surface and extends towards the inner side of the light guide element along the extending direction crossing the oblique extending direction, and defines a respective virtual focus, the extending direction and the front-back direction define an extending included angle of 35-70 degrees, each virtual focus overlaps a respective corresponding real focus and is matched and arranged with other virtual focuses to form a straight line, the light inlet part is provided with two light collecting structures which are arranged front-back and respectively extend towards the light sources of the light emitting units, each light collecting structure can be used for allowing light generated by a respective corresponding light source to enter, the light guide element further comprises two light guide side wings which are respectively protruded from the upper side and the lower side of the light guide body along the vertical direction in opposite directions, and two cover bodies which are respectively covered outside the light guide side wings along the vertical direction, wherein each light guide side wing comprises a saw tooth surface facing the front direction and a plane facing the rear direction, each cover body comprises a main cover part which covers one corresponding light guide side wing in a left-right extending manner, and an extending part which extends forwards from the central part of the main cover part, and each extending part is V-shaped with an opening towards the other extending part and extends forwards to the front of one of the light reflecting surfaces.

Description

Car light device Technical Field The present invention relates to a vehicle member, and more particularly to a lamp device suitable for use as a brake lamp. Background Referring to fig. 1 to 3, a conventional side entry light device includes a substrate unit 11, a light emitting unit 12 disposed on the substrate unit 11, and a light guiding element 13 disposed on the substrate unit 11 and extending laterally. The light emitting unit 12 includes three light sources 121 arranged one behind the other and located between the substrate unit 11 and the light guiding element 13. The light source 121 can provide light traveling in the left-right direction. The light guide element 13 includes a light emitting portion 14 and a light reflecting portion 15 arranged in front of and behind each other, and a light incident portion 16 connected between the light emitting portion 14 and the light reflecting portion 15 and facing the light emitting unit 12. The light-emitting portion 14 has a light-emitting surface 141 with a plane. The light reflecting portion 15 extends obliquely from front to back, and includes a plurality of light reflecting surfaces 151 arranged right and left and being planar. Each of the reflective surfaces 151 reflects light traveling in a substantially horizontal direction toward the light-emitting portion 14, so that the light is emitted from the light-emitting surface 141 and forms a light shape as shown in fig. 3. The light incident portion 16 is formed with three light collecting structures 161 protruding toward the light source 121. Such a conventional lamp device is suitable for use as a brake light to warn a vehicle coming backward, however, in the case of the brake light, the light distribution effective area 180 specified by regulations is located in the central zone only as shown in fig. 3, but in the case of the isochronic circle consisting of the same candelas (cd) in fig. 3, the first isochronic circle 181, the second isochronic circle 182, and the third isochronic circle 183, which are counted from the center outward, are generally in the shape of an upright ellipse or rectangle having the same length direction as the up-down direction, and the second isochronic circle 182 and the third isochronic circle 183 protrude from the light distribution effective area 180 in the up-down direction except that the first isochronic circle 181 is located in the light distribution effective area 180, so that it is known that the conventional lamp device has a large portion wasted outside the light distribution effective area 180 and needs improvement. Disclosure of Invention The object of the present invention is to provide a lamp device which ameliorates at least one of the disadvantages of the prior art. The invention provides a car lamp device, which is suitable for projecting light backwards and comprises a substrate unit, a light emitting unit arranged on the substrate unit and a light guiding element, wherein the light emitting unit can provide light projected along the left-right direction, the light guiding element comprises a light guiding body extending leftwards and rightwards, the light guiding body comprises a light emitting part and a light reflecting part which are arranged backwards and forwards and a light entering part which is connected between the light emitting part and the light reflecting part and faces the light emitting unit, the light emitting part is provided with a plurality of left-right arranged light emitting surfaces, each light emitting surface can be used for emitting light backwards from the light guiding body of the light guiding element, the convex surface of each light emitting surface faces backwards and defines a real focus which is positioned in front of the light reflecting part, the light reflecting part is provided with a plurality of light reflecting surfaces which are arranged leftwards and rightwards and are arranged towards the inner side of the light guiding element, each light reflecting surface is positioned in front of a corresponding light emitting surface, each light emitting surface is formed to overlap a corresponding real focus, each light emitting surface can be virtually reflected towards an extension line after the light emitting element. The light emitting part comprises a first light emitting section and a second light emitting section, wherein the first light emitting section obliquely extends from front to back away from the light reflecting part, the second light emitting section obliquely extends from back to front towards the light reflecting part, the light emitting surface is formed on the first light emitting section and the second light emitting section, and the light reflecting part is obliquely connected with the second light emitting section from front to back towards the second light emitting section. In the car light device of the invention, the width direction of each light emitting surface is in the same direction as the l