Vehicle lighting devices

Abstract

A vehicle lighting device includes a compound lens unit, a first reflector, a second reflector, a shield and a light-emitting unit. The compound lens unit includes a first lens and a lens group. The first lens has a first light incident surface, a first light exit surface and an upper focus, and the lens group has a second light incident surface, a second light exit surface and a lower focus. The first reflector includes a first reflective surface with a first focus and a second focus. The second reflector includes a second reflective surface with a third focus and a fourth focus. The light-emitting unit includes a first light source and a second light source. When the first light source is turned on, the light enters the first lens after reflection and projects a low-light beam from the first light exit surface. When the second light source is turned on, the light enters the lens group and projects a high-light beam. The high-light and low-light beams are switched by the switch of the light source, and the switching speed is faster.

Description

Technical Field

[0001] The present invention relates to a vehicle lighting device, and in particular to a vehicle lighting device with low beam and high beam functions. Background Art

[0002] An existing high and low beam switching device as disclosed in Taiwan Patent Certificate No. TWM248960 is applicable to a vehicle lamp, wherein the vehicle lamp comprises a light-emitting component, a reflector disposed on one side of the light-emitting component, and a projection lens disposed on the side of the light-emitting component opposite to the reflector. The high and low beam switching device is disposed between the light-emitting component and the projection lens, and comprises a fixing plate, a solenoid valve fixed to the fixing plate, and a shading plate that can be raised and lowered by the solenoid valve. The light emitted by the light-emitting component of the vehicle lamp is reflected by the reflector and then projected into a light shape through the projection lens. The solenoid valve can control the movement of the shading plate and move the shading plate between an upper position and a lower position relative to the light-emitting component. When in the upper position, the shading plate intercepts light between the light-emitting component and the projection lens, and after interception, the light passes through the projection lens and projects a low beam spot with a clear light cutoff line. When in the lower position, the shading plate moves out of the path of the light, so the light is not blocked and a high beam light pattern is projected through the projection lens.

[0003] The existing high and low beam switching device can realize the switching of high and low beam shapes by controlling the up and down movement of the shading plate by the solenoid valve. However, the solenoid valve has a slow response speed and is easy to be damaged. Once damaged, the function of switching high and low beam shapes is lost. Summary of the invention

[0004] The object of the present invention is to provide a vehicle lighting device without a solenoid valve structure and capable of simultaneously realizing and switching between low beam and high beam functions.

[0005] The vehicle lighting device of the present invention comprises a compound lens unit, a first reflector, a second reflector, a shield, and a light-emitting unit. The compound lens unit comprises a first lens arranged along a low-light beam axis, and a lens group located below the first lens, wherein the first lens has a first light-entry surface and a first light-exit surface arranged opposite to the low-light beam axis, and an upper focus corresponding to the first light-entry surface, and the lens group comprises a plurality of second lenses, a second light-entry surface formed by the second lenses and located on the same side as the first light-entry surface along the extension direction of the low-light beam axis and arranged with a step difference with the first light-entry surface, a second light-exit surface formed by the second lenses and opposite to the second light-entry surface, and a lower focus corresponding to the second light-entry surface. The first reflector is located on a side of the compound lens unit corresponding to the first light-entry surface along the low-light beam axis, and comprises a first reflector surface which can reflect light toward the first light-entry surface and is in an arc shape. The first reflector surface has a first focus away from the first light-entry surface, and a second focus adjacent to the first light-entry surface, and the position of the first reflector makes the second focus coincide with the upper focus of the first lens. The second reflector is arranged on a side of the composite lens unit corresponding to the second light incident surface along a high beam light axis, and includes a second reflector surface that can reflect light toward the second light incident surface and is in an arc shape. The second reflector surface has a third focus away from the second light incident surface, and a fourth focus arranged on a side of the third focus adjacent to the second light incident surface along the high beam light axis, and the position of the second reflector makes the fourth focus coincide with the lower focus of the lens group. The shield corresponds to the second focus of the first reflector and extends downward. The light-emitting unit includes a first light source arranged at a first focus adjacent to the first reflector, and a second light source arranged at a third focus adjacent to the second reflector. When the first light source is turned on, the light emitted by the first light source is reflected by the first reflector, and part of the light is shielded by the shield, and the remaining light enters the first lens from the first light incident surface, and a low beam light shape is projected from the first light exit surface. When the second light source is turned on, the light emitted by the second light source is reflected by the second reflector and incident on the second light incident surface, and a high beam light shape is projected from the second light exit surface.

[0006] In the vehicle lighting device of the present invention, the low light axis and the high light axis intersect at an angle.

[0007] In the vehicle lighting device of the present invention, the angle between the low light axis and the high light axis is between 0 degrees and 60 degrees.

[0008] In the vehicle lighting device of the present invention, the first light incident surface is located in front of the second light incident surface along an extending direction parallel to the light axis of the low beam.

[0009] In the vehicle lighting device of the present invention, the distance between the first light incident surface and the second light incident surface is between 1 mm and 30 mm.

[0010] In the vehicle lighting device of the present invention, the second light emitting surface has a first section located below the low beam light axis, and two second sections arranged on the left and right opposite sides of the first section and arranged with a difference from the first section along the extending direction of the low beam light axis.

[0011] In the vehicle lighting device of the present invention, the lens group has four second lenses, two of the second lenses together form the first segment, and the other two of the second lenses respectively form the second segment.

[0012] In the vehicle lighting device of the present invention, the first lens and the lens group of the compound lens unit are formed integrally.

[0013] In the vehicle lighting device of the present invention, the first light source and the second light source of the light emitting unit are light emitting diodes formed by at least one semiconductor chip.

[0014] The vehicle lighting device of the present invention further comprises a base, and the first reflector, the second reflector, the light-emitting unit and the shielding plate are arranged on the base.

[0015] The beneficial effect of the present invention is that the low light and high light are switched by switching the first light source and the second light source, and the switching speed is faster than that of the existing solenoid valve structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional diagram of an embodiment of the vehicle lighting device of the present invention;

[0017] Figure 2 is along Figure 1 A cross-sectional view taken along line II-II;

[0018] Figure 3 is along Figure 2 A cross-sectional view taken along line III-III;

[0019] Figure 4 The embodiment and Figure 2 A schematic diagram of the light path at the same viewing angle;

[0020] Figure 5 is a light shape gradient diagram of a low beam lamp of the embodiment; and

[0021] Figure 6 It is a light shape gradient diagram of a high beam lamp of the embodiment. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0023] See also Figure 1 , 2 3. The vehicle lighting device of the present invention comprises a base 2, a lens bracket 3, a compound lens unit 4, a first reflector 5, a second reflector 6, a shield 7, a heat sink 8, and a light-emitting unit 9.

[0024] The base 2 is used to mount the first reflector 5 , the second reflector 6 , the shield 7 , the heat sink 8 , and the light emitting unit 9 .

[0025] The lens bracket 3 connects the base 2 and the compound lens unit 4 and is used for setting the compound lens unit 4 .

[0026] The compound lens unit 4 includes a first lens 41 disposed along a low beam light axis A, and a lens group 42 located below the first lens 41. In this embodiment, the first lens 41 and the lens group 42 are integrally formed and clamped in the lens holder 3.

[0027] The first lens 41 has a first light incident surface 411 and a first light emitting surface 412 disposed opposite to each other along the low beam light axis A, and an upper focus 413 corresponding to the first light incident surface 411. The lens group 42 has a plurality of second lenses 421, a second light incident surface 422 formed by the second lenses 421 and located on the same side as the first light incident surface 411 along the extending direction of the low beam light axis A and disposed at a step with the first light incident surface 411, a second light emitting surface 423 formed by the second lenses 421 and opposite to the second light incident surface 422, and a lower focus 424 corresponding to the second light incident surface 422. The first light incident surface 411 is located in front of the second light incident surface 422 along a front-to-rear direction X parallel to the low beam light axis A.

[0028] The second light emitting surface 423 has a first section 425 located below the low beam light axis A, and two second sections 426 disposed on opposite sides of the first section 425 along a left-right direction Y perpendicular to the front-back direction X, and the second section 426 is disposed at a height difference from the first section 425 along the front-back direction X. In this embodiment, the lens group 42 has four second lenses 421, two of which together form the first section 425, and the other two of which respectively form the second sections 426. In this embodiment, the first lens 41 and the plurality of second lenses 421 of the lens group 42 are all plano-convex lenses.

[0029] The first reflector 5 is disposed on the base 2 and is located on a side of the compound lens unit 4 corresponding to the first light incident surface 411 along the low light axis A. The first reflector 5 includes a first reflective surface 51 in an arc shape that can reflect light toward the first light incident surface 411. The first reflective surface 51 has a first focus 511 away from the first light incident surface 411 and a second focus 512 adjacent to the first light incident surface 411. The position of the first reflector 5 makes the second focus 512 coincide with the upper focus 413 of the first lens 41.

[0030] The second reflector 6 is disposed on a side of the base 2 opposite to the first reflector 5, and is located on a side of the compound lens unit 4 corresponding to the second light incident surface 422 along a high light axis B. The second reflector 6 includes a second reflective surface 61 in an arc shape that can reflect light toward the second light incident surface 422. The second reflective surface 61 has a third focus 611 away from the second light incident surface 422, and a fourth focus 612 disposed on a side of the third focus 611 adjacent to the second light incident surface 422 along the high light axis B. The position of the second reflector 6 makes the fourth focus 612 coincide with the lower focus 424 of the lens group 42.

[0031] In this embodiment, the low light beam axis A intersects with the high light beam axis B at an angle θ, and the angle θ is between 0 degrees and 60 degrees.

[0032] The shielding plate 7 is disposed above the base 2 , corresponds to the second focus 512 of the first reflector 5 and extends downward, and is used to shield part of the light from the first reflector 5 and form a light-dark cutoff line.

[0033] The light emitting unit 9 includes a first light source 91 disposed at a first focal point 511 adjacent to the first reflector 5, and a second light source 92 disposed at a third focal point 611 adjacent to the second reflector 6. The first light source 91 and the second light source 92 are light emitting diodes (not shown) formed by at least one semiconductor chip.

[0034] See also Figure 4 , 5 6. When the first light source 91 is turned on, the light of the first light source 91 is emitted from the first focus 511 of the first reflector 5, and after being reflected by the first reflective surface 51, passes through the second focus 512, part of the light is shielded by the shielding plate 7, and the remaining light enters the first lens 41 from the first light incident surface 411, and projects a low-light beam shape from the first light emitting surface 412. When the second light source 92 is turned on, the light emitted by the second light source 92 is emitted from the third focus 611 of the second reflector 6, passes through the fourth focus 612 after being reflected by the second reflective surface 61, and enters the lens group 42 from the second light incident surface 422, and then projects a high-light beam shape from the second light emitting surface 423.

[0035] See also Figure 3 , 4 , 6, the second reflector 6 can improve the efficiency of collecting and focusing the light of the second light source 92. The first section 425 and the second section 426 of the second light emitting surface 423 are curved surfaces set along the front-to-back direction X with a drop, so that the curvatures of the first section 425 and the second section 426 of the plurality of second lenses 421 can be adjusted respectively during manufacturing, and the path of light travel can be controlled by adjusting the curvature, and the focusing effect when projecting the high-beam light shape can be improved. By controlling the curvatures of the first section 425 and the second section 426 respectively, the position of the high-beam light projection can also be directly controlled, so that when the second light source 92 is lit alone, the present invention can have a complete high-beam light shape without the need for superposition of light shapes, so it can also effectively reduce the power loss of turning on the first light source 91 at the same time. In this case, the second reflector 6 is used in combination with the first section 425 and the second section 426 of the lens group 42 with a drop setting, which can increase the light distribution intensity of the high beam and make the light shape more concentrated.

[0036] It is worth mentioning that the first light incident surface 411 is disposed in front of the second light incident surface 422 along the front-to-back direction X, so as to prevent the low-lamp light from being projected forward by the second light incident surface 422 of the lens assembly 42, thereby reducing the influence of stray light. In this embodiment, the distance between the first light incident surface 411 and the second light incident surface 422 is between 1 mm and 30 mm.

[0037] In summary, the vehicle lighting device of the present invention directly controls and switches the switches of the first light source 91 and the second light source 92 to switch between low beam and high beam, thereby providing a vehicle lighting device without a solenoid valve structure but capable of simultaneously realizing and switching between low beam and high beam functions. In addition to having a faster switching speed, it is also less prone to damage, thereby avoiding the shortcomings of slow response speed and easier damage as described in the previous case, thereby improving the reliability and life of the vehicle lighting device, and thus can truly achieve the purpose of the present invention.

Claims

1. A vehicle lighting device, comprising a compound lens unit, a first reflector, a shield, and a light-emitting unit, wherein the compound lens unit comprises a first lens arranged along a low-light beam axis, the first lens having a first light incident surface and a first light emitting surface arranged opposite to the low-light beam axis, and an upper focus corresponding to the first light incident surface, the first reflector is located on a side of the compound lens unit corresponding to the first light incident surface along the low-light beam axis, and comprises a first arc-shaped reflective surface capable of reflecting light toward the first light incident surface, the first reflector has a first focus away from the first light incident surface, and a second focus adjacent to the first light incident surface, the first reflector is positioned so that the second focus coincides with the upper focus of the first lens, the shield corresponds to the second focus of the first reflector and extends downward, the light-emitting unit comprises a first light source arranged adjacent to the first focus of the first reflector, characterized in that: The vehicle lighting device also includes a second reflector, and the compound lens unit also includes a lens group located below the first lens, the lens group having a plurality of second lenses, a second light incident surface formed by the second lenses and located on the same side as the first light incident surface along the extension direction of the low light beam axis and arranged at a step difference with the first light incident surface, a second light emitting surface formed by the second lenses and opposite to the second light incident surface, and a lower focus corresponding to the second light incident surface, the second light emitting surface has a first section located below the low light beam axis, and two second sections arranged on the left and right opposite sides of the first section and arranged at a step difference with the first section along the extension direction of the low light beam axis, the second reflector is arranged on a side of the compound lens unit corresponding to the second light incident surface along a high light beam axis, and includes a second reflective surface that can reflect light toward the second light incident surface and is in an arc shape, the second reflective surface has a first section away from the first light incident surface The lens group comprises a third focus of two light incident surfaces, and a fourth focus arranged on a side of the third focus adjacent to the second light incident surface along the axis of the high light. The position of the second reflector makes the fourth focus coincide with the lower focus of the lens group. The light-emitting unit also includes a second light source arranged at the third focus adjacent to the second reflector. When the first light source is turned on, the light emitted by the first light source is reflected by the first reflector, and part of the light is shielded by the shielding plate, and the remaining light enters the first lens from the first light incident surface and projects a low light beam shape from the first light emitting surface. When the second light source is turned on, the light emitted by the second light source is reflected by the second reflector and incident on the second light incident surface, and projects a high light beam shape from the second light emitting surface. The lens group has four second lenses, two of which together form the first segment, and the other two of which respectively form the second segment.

2. The vehicle lighting device according to claim 1, characterized in that: The low light beam axis intersects with the high light beam axis at an angle.

3. The vehicle lighting device according to claim 2, characterized in that: The angle between the low light axis and the high light axis is between 0 degrees and 60 degrees.

4. The vehicle lighting device according to claim 1, characterized in that: The first light incident surface is located in front of the second light incident surface along an extending direction parallel to the light axis of the low beam.

5. The vehicle lighting device according to claim 4, characterized in that: The distance between the first light incident surface and the second light incident surface is between 1 mm and 30 mm.

6. The vehicle lighting device according to claim 1, characterized in that: The first lens of the compound lens unit is formed integrally with the lens group.

7. The vehicle lighting device according to claim 1, characterized in that: The first light source and the second light source of the light emitting unit are light emitting diodes formed by at least one semiconductor chip.

8. The vehicle lighting device according to claim 1, characterized in that: The vehicle lighting device further comprises a base, and the first reflector, the second reflector, the light emitting unit and the shielding plate are arranged on the base.

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