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Lighting device and vehicle headlamp

A technology for lighting devices and headlights, which is applied to lighting devices, lighting device parts, headlights, etc., can solve problems such as decreased efficiency, and achieve the effects of preventing the generation of stray light, good design, and improving optical efficiency.

Active Publication Date: 2022-02-15
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is a problem that efficiency decreases when miniaturization

Method used

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  • Lighting device and vehicle headlamp
  • Lighting device and vehicle headlamp
  • Lighting device and vehicle headlamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0086] Figure 1 to Figure 5 The first lighting device L1 according to Embodiment 1 of the present invention is shown.

[0087] figure 1 (a) shows a side view of the first lighting device L1, figure 2 (a) shows its top view.

[0088] This lighting device includes: a light emitting element 1; a first lens 2 that takes in light generated by the light emitting element 1 and emits it; direction shot. exist image 3 The shapes of the first lens 2 are shown in (a) to (d).

[0089] In the first lens 2 , a first lens inlet 4 through which light generated by the light emitting element 1 enters is formed on the base end side B of one side of the light emitting element 1 . The first lens entrance 4 has a concave shape surrounding the light emitting element 1 , and has a first entrance surface 4 a as a bottom surface of the concave shape and a second entrance surface 4 b as a side surface of the concave shape.

[0090] On the front end side F of the first lens 2 , there is formed...

Embodiment approach 2

[0106] Figure 6 ~ Figure 9 The second lighting device L2 according to Embodiment 2 of the present invention is shown.

[0107] Image 6 (a) shows a side view of the second lighting device L2, Image 6 (b) shows a longitudinal sectional view of the second lighting device L2, Figure 7 shows a horizontal sectional view of the second lighting device L2, Figure 8 Shows its front view.

[0108] The second lighting device L2 includes a first lens 2a and a second lens 3a. The second reflective surface 6b of the first lens 2 in Embodiment 1 includes two surfaces, the horizontal plane 10 and the inclined surface 11, while the second reflective surface 6b of the first lens 2a in Embodiment 2 only includes the horizontal plane 10. different.

[0109] The second lens 3 a of Embodiment 2 is a thin lens whose thickness in the left-right direction is smaller than the thickness in the up-down direction. The second lens 3 a is different from the second lens 3 according to the first em...

Embodiment approach 3

[0113] Figure 10 ~ Figure 13 A third lighting device L3 according to Embodiment 3 of the present invention is shown.

[0114] Figure 10 (a) shows a side view of the third lighting device L3, Figure 10 (b) shows a longitudinal sectional view of the third lighting device L3, Figure 11 (a) shows a top view of the third lighting device L3, Figure 11 (b) shows a horizontal cross-sectional view of the third lighting device L3, Figure 12 Shows its front view.

[0115] The third lighting device L3 includes a first lens 2b and a second lens 3b. The first lens 2b is the same as the first lens 2a of the second embodiment.

[0116] The second lens 3b is a thin lens whose thickness in the horizontal direction is smaller than that in the vertical direction. The second lens 3b is different from the second lens 3a in the second embodiment in the shape of the horizontal incident surface 12b and the shape of the horizontal output surface 13b.

[0117] Specifically, the up-down dir...

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Abstract

A lighting device and a headlamp for a vehicle are small and thin, high in efficiency, and good in design. The lighting device of the present invention comprises: a first lens (2), which takes in the light generated by the light-emitting element (1) and emits it; and a second lens (3), which takes in the emitted light from the first lens (2) and takes it in. and emit, the second lens (3) is an anamorphic lens with different curvatures in the up-down direction and the left-right direction, and the center (14) of the up-down direction of the lens surface of the second lens (3) is smaller than the optical axis of the first lens (2) (9) More upward direction. A vehicle headlamp equipped with a plurality of such lighting devices can illuminate central light distribution, middle light distribution, and wide-width light distribution by changing the shape of the second lens, and can illuminate the center and the left and right lamps in the horizontal direction respectively. The light is superimposed to form the light distribution of the dipped beam.

Description

technical field [0001] The present invention relates to a lighting device and a vehicle headlamp using the lighting device. Background technique [0002] For vehicle headlights, so-called crossing headlights of headlights, in order not to dazzle oncoming vehicles and pedestrians, the following luminosity distribution is required for the low beam, that is, to cut off the light above the horizontal line, Furthermore, the front of the road surface in the direction of travel of the vehicle is bright, the direction of travel of the vehicle is near the front, and the brightness in the lateral direction is lower than that in the center of the direction of travel of the vehicle so that the road surface will not be dazzling. [0003] In order to realize such light distribution, for example, the lighting device described in Patent Document 1 is used. exist Figure 20 The lighting device is shown in . [0004] This lighting device is a so-called multi-eye lamp, which includes three c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S41/25F21V5/00F21V5/04
CPCF21S41/25F21V5/008F21V5/045F21S41/285F21S41/24F21S41/255F21S41/27F21S41/322F21Y2115/20F21Y2115/10F21S41/143F21S41/26F21S41/275
Inventor 松田孝司笠野真弘
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD