CN114746921A

CN114746921A - Anti-glare lens unit and LED light source system

Info

Publication number: CN114746921A
Application number: CN201980102681.3A
Authority: CN
Inventors: 赵海天; 张兵
Original assignee: Shenzhen University
Current assignee: Shenzhen University
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2022-07-12
Also published as: WO2021127838A1

Abstract

An anti-glare lens unit (30) and an LED light source system (100) comprising the anti-glare lens unit (30), the anti-glare lens unit (30) comprising: a condenser lens (40) for condensing and emitting light; and a beam splitting lens assembly (50), the beam splitting lens assembly (50) is formed on the light emitting side of the condensing lens (40), the beam splitting lens assembly (50) is provided with light emitting surfaces in at least two light emitting directions, and the beam splitting lens assembly (50) It is used to change the direction of the light emitted from the condensing lens (40) and then emit it along at least two predetermined light-emitting directions.

Description

PCT国内申请，说明书已公开。PCT domestic application, the description has been published.

Claims

An anti-glare lens unit, comprising:

the condensing lens is used for condensing and emitting light rays; and

the light splitting lens assembly is formed on the light emitting side of the condenser lens, light emitting surfaces are arranged on the light splitting lens assembly in at least two light emitting directions, and the light splitting lens assembly is used for changing the direction of light emitted from the condenser lens and then emitting the light along at least two preset light emitting directions.
The anti-glare lens unit of claim 1, wherein the beam splitting lens assembly comprises first and second light emitting surfaces, first and second reflecting surfaces; and part of the light emitted from the condenser lens is reflected by the first reflecting surface and then emitted from the first light emitting surface, and the other part of the light emitted from the condenser lens is reflected by the second reflecting surface and then emitted from the second light emitting surface.
The anti-glare lens unit according to claim 2, wherein the first light-emitting surface and the second light-emitting surface are parallel to and opposite to each other, and the first light-emitting surface and the second light-emitting surface extend in the same direction as the light-emitting direction of the condenser lens.
An anti-glare lens unit according to claim 3, wherein the beam splitter lens assembly comprises a first beam splitter lens and a second beam splitter lens which are disposed to be opposed; the first light splitting lens is in a triangular prism shape, and the first reflecting surface and the first light emitting surface are formed on the first light splitting lens; the second light splitting lens is also triangular prism-shaped, and the second reflecting surface and the second light emitting surface are formed on the second light splitting lens.
The anti-glare lens unit according to claim 1, wherein the light splitting lens assembly is an integral structure including a light exit surface and a reflection surface; the reflecting surface is a conical surface, and the conical tip of the reflecting surface faces the condenser lens; the light emitting surface surrounds the reflecting surface; the light rays emitted from the condensing lens are reflected by the reflecting surface and then are emitted from the light emitting surface in an annular shape.
The anti-glare lens unit according to claim 5, wherein the light exit surface is a cylindrical surface or a draft cone surface.
The anti-glare lens unit according to claim 1, further comprising a sawtooth lens formed on the light exit surface; the sawtooth lens is used for adjusting the direction of the light emitted from the light emitting surface.
The anti-glare lens unit according to claim 1, wherein the condenser lens comprises:

the lens comprises a lens body, a lens cover and a lens, wherein the lens body is provided with an upper surface, a lower surface and an outer peripheral surface which are opposite, and the outer peripheral surface of the lens body is a total reflection surface;

the first concave structure is formed by inwards concave the middle part of the lower surface of the lens body and comprises a first arc-shaped bottom surface; and

the second concave structure is formed by inwards concave the middle part of the upper surface of the lens body and comprises a second arc-shaped bottom surface;

the lens body between the first arc-shaped bottom surface and the second arc-shaped bottom surface forms a biconvex lens;

the light rays incident from the first arc-shaped bottom surface are collimated by the double convex lens and then are emitted from the second arc-shaped bottom surface; and the light rays incident to the lens body from the side surface of the first concave structure are reflected by the total reflection surface and then are emitted from the upper surface of the lens body.
An anti-glare lens unit according to claim 7, wherein the outer circumferential surface of the lens body is a cone-like surface formed by a plurality of planes that are joined and surrounded; the side surfaces of the first concave structure and the second concave structure are cylindrical surfaces or drawing conical surfaces.
An LED light source system comprising a substrate, an LED chip formed on the substrate, and the anti-glare lens unit according to any one of claims 1 to 9 provided over a light emitting surface of the LED chip; the light emitted by the LED chip is converged by the condenser lens and then emitted to the light splitting lens assembly, and the direction of the light split lens assembly is changed and then emitted along at least two preset light emitting directions.