Lens array, vehicle-lamp lens group using lens array, and vehicle-lamp assembly using vehicle-lamp lens group

A vehicle-lamp lens group, comprising:

• a lens array disposed on a substrate and comprising:
• a plurality of converging lenses configured to project light beams and arranged along a first direction, wherein two of the light beams respectively converged by adjacent two of the converging lenses at least partially overlap with each other by geometry of the adjacent two converging lenses, a distance between the adjacent two converging lenses, or a combination thereof, wherein each of the converging lenses has an illuminating surface facing away from the substrate and having a first central point and a first optical axis, the first optical axis passes through the first central point, and a curvature of the illuminating surface measured along a direction perpendicular to the first direction satisfies:
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• wherein 1<R1<10 and −2<K1<0, and y is a distance from any point on the illuminating surface to the first central point measured along a direction parallel to the first optical axis, x is a distance from the point on the illuminating surface to the first optical axis measured along a direction perpendicular to the first optical axis;
• a light-source array disposed on the substrate and between the substrate and the lens array, wherein the light-source array comprises a plurality of light sources disposed on the substrate and arranged at least along the first direction, and the lens array is configure to project at least one light beam provided by the light-source array;
• and
• a projection lens covering the lens array.

A vehicle-lamp assembly, comprising:

• a vehicle-lamp lens group, comprising:
• a lens array disposed on a substrate and comprising:
• a plurality of converging lenses configured to project light beams and arranged along a first direction, wherein two of the light beams respectively converged by adjacent two of the converging lenses at least partially overlap with each other by geometry of the adjacent two converging lenses, a distance between the adjacent two converging lenses, or a combination thereof, wherein each of the converging lenses has an illuminating surface facing away from the substrate and having a first central point and a first optical axis, the first optical axis passes through the first central point, and a curvature of the illuminating surface measured along a direction perpendicular to the first direction satisfies:
• y
• =
• (
• x
• 2
• R
• ⁢
• ⁢
• 1
• )
• /
• 1
• +
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• 1
• -
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• 1
• +
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• wherein 1<R1<10 and −2<K1<0, and y is a distance from any point on the illuminating surface to the first central point measured along a direction parallel to the first optical axis, x is a distance from the point on the illuminating surface to the first optical axis measured along a direction perpendicular to the first optical axis;
• a light-source array disposed on the substrate and between the substrate and the lens array, wherein the light-source array comprises a plurality of light sources disposed on the substrate and arranged at least along the first direction, and the lens array is configure to project at least one light beam provided by the light-source array;
• and
• a projection lens covering the lens array;
• a fixed frame having an opening therein, wherein the projection lens is disposed within the fixed frame through the opening;
• a heat-dissipation base having at least one heat-dissipation fin, wherein the fixed frame is disposed on the heat-dissipation base, the light-source array is disposed in the heat-dissipation base, and the light-source array and the lens array are located between the heat-dissipation base and the projection lens;
• a heat-dissipation device connected with the heat-dissipation base and configured to generate an airflow traveling toward the heat-dissipation fin;
• and
• a switch device disposed between the light-source array and the projection lens and having at least one light-blocking plate, wherein the projection lens, the switch device, and the light-source array are assembled along an arranging direction, and the light-blocking plate is movable in a switch direction which intersects the arranging direction.