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Lens, light guide cover with the lens and lighting device using the lens

A lens and light guide plate technology, applied in the field of optics, can solve problems such as weak light output and uneven light field distribution, and achieve the effect of enhanced light field intensity and uniform light field distribution

Active Publication Date: 2019-05-28
CHAMP TECH OPTICAL FOSHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the light field distribution of this lighting device, the light emitted from the center of the lighting device is stronger and the light emitted from both sides is weaker, and the distribution of the entire light field is not uniform.

Method used

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  • Lens, light guide cover with the lens and lighting device using the lens
  • Lens, light guide cover with the lens and lighting device using the lens
  • Lens, light guide cover with the lens and lighting device using the lens

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Embodiment Construction

[0017] see figure 1 with figure 2 , the light guide cover 1 a according to an embodiment of the present invention includes a light guide plate 200 and a plurality of lenses 100 located on the light guide plate 200 . The lenses 100 are arranged in an array on the light guide plate 200 . In this embodiment, the lenses 100 and the light guide plate 200 are integrally formed by injection molding. The light guide cover 1 a is made of PMMA (polymethyl methacrylate) or PC (polycarbonate) material with high light transmittance, which can effectively reduce light loss and improve light emission efficiency. Understandably, in other embodiments, the plurality of lenses 100 and the light guide plate 200 can be molded separately, and then these lenses 100 are installed and fixed on the light guide plate 200 by an adhesive to form the light guide cover 1a.

[0018] The light guide plate 200 is rectangular in shape. The light guide plate 200 has an upper surface 201 and a lower surface ...

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Abstract

A lens is used for adjusting optical field distribution of a light-emitting diode light source and comprises a light entering surface and a light exiting surface, wherein light emitted from light-emitting diodes enters the lens via the light entering surface and exits from the lens via the light exiting surface; the light entering surface is an inwards concave spherical surface; the light exiting surface is an outwards convex aspherical surface; the light exiting surface and the light entering surface are centrosymmetric surfaces; and the central axis of the light entering surface is coincident with the central axis of the light exiting surface. The light entering surface of the lens is the spherical surface, the light exiting surface is the outwards convex aspherical surface, the light entering surface and the light exiting surface of the lens are matched with each other, and after the light emitted from the light source is refracted by the lens, the light field intensities of two sides of the lens are improved, so that uniform optical field distribution is acquired. The invention also relates to a light guiding cover with the lens and an illuminating device comprising the lens.

Description

technical field [0001] The invention relates to the field of optics, in particular to a lens, a light guide cover with the lens and an illuminating device using the lens. Background technique [0002] Light emitting diode (light emitting diode, LED), as a high-efficiency light source, has many characteristics such as environmental protection, power saving, and long life, and has been widely used in lighting equipment. [0003] In order to meet the actual lighting requirements, generally a reflector is installed in the light emitting direction of the LED light source, so as to distribute the light emitted by the LED light source reasonably and effectively. However, in the light field distribution of this lighting device, the light emitted from the center of the lighting device is stronger and the light emitted from the two sides is weaker, and the distribution of the entire light field is not uniform. Contents of the invention [0004] In view of this, it is necessary to p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21V5/04F21V8/00F21V19/00
Inventor 陈庆仲谯胜杰
Owner CHAMP TECH OPTICAL FOSHAN
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