CN114063207A - Light guide piece, light guide system and lamp - Google Patents

Light guide piece, light guide system and lamp Download PDF

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Publication number
CN114063207A
CN114063207A CN202111279441.6A CN202111279441A CN114063207A CN 114063207 A CN114063207 A CN 114063207A CN 202111279441 A CN202111279441 A CN 202111279441A CN 114063207 A CN114063207 A CN 114063207A
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Prior art keywords
light
light guide
starting end
thickness
starting
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CN202111279441.6A
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CN114063207B (en
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古念松
伍德生
吴海生
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NVC Lighting Technology Corp
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NVC Lighting Technology Corp
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/0015—Fastening arrangements intended to retain light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The application provides a light guide part, which comprises a starting end, a terminal end and a light guide part positioned between the starting end and the terminal end; the thickness of the light guide part is gradually reduced from the starting end to the terminal end; the terminal end is connected with the starting end, so that the light guide part forms a closed annular structure; the starting end is provided with a light inlet part in a cross-sectional surface at the joint with the terminal end, the bottom surface of the light guide part is a light outlet part, and the light outlet part is provided with a light outlet structure. The invention also provides a light guide system and a lamp comprising the light guide piece, so as to solve the problems of large volume and uneven light emission of the traditional light guide system.

Description

Light guide piece, light guide system and lamp
Technical Field
The invention relates to the technical field of lighting devices, in particular to a light guide piece, a light guide system and a lamp.
Background
The light guide is an optical member that converts a point light source or a line light source into a surface light source. The existing light guide member is often used in combination with more than two light emitting elements, and the light emitting elements are guided by the annular light guide member to form a bright light ring. In some auxiliary lighting, a point light source or a line light source is also used together with a light guide, and the space occupied by the optical structure needs to be as small as possible. The light guides have separate input and illumination ends and, in addition to the annular portion of the body, must also be towed to a longer tail end for collecting light and guiding light. However, this results in the light guide becoming larger in overall size, thereby occupying a larger space in the main luminaire and being disadvantageous for placing other components of the luminaire.
Moreover, the light guide member used with a plurality of light emitting elements has a high brightness at the bottom opposite to the incident position and a low brightness at the peripheral part, i.e. the problem of uneven illumination is easily caused at the bottom and the peripheral part opposite to the incident position.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a light guide part which is provided with a light guide part with gradually reduced thickness, can form an integral structure with a light source, and has small product size and uniform bottom light emission. The invention also provides a light guide system and a lamp comprising the light guide piece, so as to solve the problems of large volume and uneven light emission of the traditional light guide system.
In order to achieve the purpose, the invention provides the following technical scheme:
the light guide part comprises a starting end, a terminal end and a light guide part positioned between the starting end and the terminal end;
the thickness of the light guide part is gradually reduced from the starting end to the terminal end;
the terminal end is connected with the starting end, so that the light guide part forms a closed annular structure;
the starting end is provided with a light inlet part in a cross-sectional surface at the joint with the terminal end, the bottom surface of the light guide part is a light outlet part, and the light outlet part is provided with a light outlet structure.
In the light guide member, the light guide portion extends from the starting end and then gradually decreases in thickness to the final end; the terminal end is connected with the starting end to form a closed annular structure, so that the light guide part has a single-turn spiral structure; and the starting end is provided with a light inlet part with a cross-section surface at the connection part of the terminal end, and the light inlet part is used for guiding the light source, and is emitted from the bottom of the light guide member after being processed by the light guide part.
Preferably, the light-emitting structure is a frosted surface, and the frosting degree of the frosted surface gradually increases from the starting end to the terminal end.
Preferably, the light exit structure is a first light exit hole formed in the light exit portion, and an opening size of the first light exit hole gradually increases from the starting end to the ending end.
Preferably, the opening depth of the first light emitting hole gradually increases from the starting end to the ending end.
Preferably, the first light outlet hole is circular, elliptical or regular polygonal.
Preferably, the light exit structure is a second light exit hole formed in the light exit portion, and the opening depth of the second light exit hole gradually increases from the starting end to the ending end.
Preferably, the thickness of the starting end is a, and the thickness of the final end is b; in the light guide part, the thickness of an extension end which is at a distance x from the starting end is c;
the thickness c of the extension end, the thickness a of the starting end and the thickness b of the terminal end have the following relations:
Figure BDA0003327113030000021
the x is the distance between the extension end and the starting end;
the R1 is the inner diameter of the light guide and the R2 is the outer diameter of the light guide.
Preferably, the light flux density Ex of the extension end and the cross-sectional light flux x of the extension end have the following relationship:
Figure BDA0003327113030000022
preferably, the width R of the light guide, and the inner diameter R1 of the light guide, and the outer diameter R2 of the light guide have the following relationships:
R＝(R2-R1)/2；
the difference between the thickness a of the starting end and the thickness b of the terminal end is a thread pitch L, and the thread pitch L and the width R of the light guide member have the following relational expression:
L＝2R。
the invention provides a light guide system, which comprises a light source part and the light guide part, wherein the light source part is arranged on the light inlet part.
Preferably, the light source is located at a central position of the light incident portion.
In the light guide system, the light source part and the light guide part are tightly connected to form a module structure, so that the structural space of the whole light guide system is saved, and the installation is convenient.
The invention also provides a lamp which comprises the light guide part or the light guide system.
In the lamp, the light source part is attached to the light inlet part of the light guide part, and the light source part and the light inlet part form an integral structure, so that the whole size of the light guide system can be reduced; and the effect of multi-light source input can be achieved by adopting single light source input, and the cost can be effectively reduced.
Based on the technical scheme, the invention has the following technical effects:
(1) according to the light guide member provided by the invention, the light inlet part in a cross-section surface is arranged at the joint of the starting end and the tail end and used for placing the light source member, light enters from the light inlet part and is emitted from the light outlet part at the bottom of the light guide member through the light guide part in a single-turn spiral structure, the light outlet part is subjected to light outlet structure treatment in a frosted or perforated mode, the total reflection condition is destroyed, the light outlet is uniform, and the light outlet efficiency and the light outlet uniformity are improved.
(2) The lamp provided by the invention adopts the light guide system in which the light source part and the light guide part are tightly connected, so that the overall size of the light guide system is reduced, the effect of multi-light-source input can be obtained through single-light-source input, and the cost is effectively reduced.
Drawings
Fig. 1 is a schematic structural view of a light guide member according to the present invention.
FIG. 2 is a schematic view of the light guide member of the present invention for processing light.
FIG. 3 is a top view of a light guide of the present invention.
FIG. 4 is an expanded cross-sectional view of a light guide of the present invention.
Fig. 5 is an expanded bottom view of the light emitting structure of the light guide member of the present invention being a frosted surface.
Fig. 6 is an expanded bottom view of the light exit structure of the light guide member of the present invention, which is the first light exit hole.
FIG. 7 is an expanded side view of the light exit structure of the light guide member of the present invention being a second light exit hole.
Fig. 8 is an exploded view of a light guide system of the present invention.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the accompanying drawings and specific examples. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1
Fig. 1 shows a schematic structural diagram of a light guide member of this embodiment, as shown in fig. 1, a light guide member 1 has a ring structure, the light guide member 1 includes a starting end 11, a terminal end 12, and a light guide portion 13, wherein the light guide portion 13 is located between the starting end 11 and the terminal end 12, and the light guide portion 13 extends from the starting end 11 to the terminal end 12, and a thickness of the light guide portion 13 gradually decreases. That is, the thickness of the light guide portion 13 spirally decreases from the starting end 11 to the terminal end 12, and then the terminal end 12 is connected to the starting end 11, so that the light guide portion 13 also has a spiral loop structure of a single turn. The spiral light guide structure can achieve higher light emitting efficiency and higher light emitting uniformity.
As shown in fig. 1, the start end 11 and the end 12 are of a seamless integral structure, and at the joint of the start end 11 and the end 12, the thickness of the start end 11 is larger than that of the end 12, so that the start end 11 forms a smooth cross-sectional surface at the joint, the cross-sectional surface is the light incident portion 101 of the light guide 1, and the light source cooperating with the light guide 1 is disposed on the light incident portion 101.
In the present embodiment, the flat bottom surface of the light guide member 1 forms the light exit portion 102.
Fig. 2 is a schematic view of the light guide member according to the present embodiment, and as shown in fig. 2, light emitted from the light source member 2 enters from the light incident portion 101 of the light guide member 1, and is processed by the light guide portion 13 and then exits from the light exiting portion 102 on the bottom surface of the light guide member 1. Since the light-emitting portion 102 of the present embodiment is provided with the light-emitting structures 103, the light-emitting structures 103 are for destroying the total reflection structure of the light-emitting portion 102, so that most of the light can be emitted from the light-emitting portion 102; wherein, the top surface of the light guide member 1 can perform total reflection on the light.
The material of the light guide member can adopt optical-grade PMMA, and also can be optical-grade materials such as high-transmittance PC, silica gel or high-transmittance glass, and the light guide member 1 is prepared by adopting optical-grade PMMA through an injection molding process.
Through configuration optimization, the light guide member 1 of the embodiment can simultaneously improve the light emitting efficiency and the light emitting illuminance uniformity of the light source member.
Specifically, the optimal design of the light guide member of the present embodiment on the size is as follows:
as shown in fig. 3As shown, the light guide 1 has a ring-shaped structure with an inner diameter (inside diameter) of R1And an outer diameter (outside diameter) of R2The width of the light guide member is R, R ═ R (R)2-R1)/2。
Fig. 4 is an expanded cross-sectional view of the light guide of the present embodiment, and as shown in fig. 4, the light guide of the present embodiment is expanded into a planar structure and is illustrated by cutting a cross section, where a thickness of the starting end 11 on the left side is a, and a thickness of the terminating end 12 on the right side is b. In the light guide portion 13, the thickness gradually decreases from the starting end 11 to the final end 12.
It can be seen that the thickness a of the starting end 11 is the largest and the thickness b of the ending end 12 is the smallest throughout the light guide 1. The pitch L of the light guide 1 is the difference between the thickness a at the start end and the thickness b at the end, i.e., L is a-b.
In this embodiment, it is preferable that the thickness a of the starting end is 3R, and the thickness b of the terminating end is R, and then L is 2R. Of course, the thickness and width values can also be adjusted according to the light guide effect and the size of the whole light guide.
In the light guide part 13, the thickness c of the extension 130 having a distance x from the start end, the thickness c of the extension 130, the thickness a of the start end, and the thickness b of the end are set to have the following relationships:
Figure BDA0003327113030000051
and x is the distance between the extension end and the starting end.
In order to ensure uniform light emission from the light emitting part, the luminous flux density at the cross section corresponding to the extension end 130 having the distance x from the starting end 11 should be the same, and the cross-sectional luminous flux passing through the extension end 130 in the light guide part 13 is set to be φxThe luminous flux density Ex of the extension end 130 and the cross-sectional luminous flux phi of the extension endxHas the following relation:
Figure BDA0003327113030000052
based on the above-mentioned relational expression, it is possible to ensure that the optical density of each cross section of the light guide portion is the same, which is one of the conditions for ensuring that the optical density in the light guide member is the same and the illuminance of the light emitting portion is uniform.
It should be noted that, in the light guide member 1 of the present embodiment, the light exit structure 103 is further added at the light exit portion 102 to destroy the total reflection condition of the bottom surface of the light guide member 1, so that the light can be emitted from the light exit surface of the light exit portion 102 after being guided by the light guide portion 13.
In some embodiments, the light exit structure 103 of the light guide 1 is a frosted surface. As shown in fig. 5, the frosting degree of the frosted surface gradually increases from the starting end to the ending end. Namely, the frosting degree is lightest at the starting end; the farther the frosted surface at the bottom of the light guide part is away from the starting end (light source end), the heavier the frosting degree is, and the frosting degree is changed linearly; at the end, the sanding was heaviest.
In some embodiments, the light exit structure 103 of the light guide 1 is a first light exit hole 104 formed on the light exit portion 102, as shown in fig. 6, an opening size of the first light exit hole 104 gradually increases from the starting end 11 to the ending end 12. Namely, the opening size of the first light outlet hole is the smallest at the starting end; the farther away from the starting end (light source end), the larger the opening size of the first light outlet hole is, and the size changes linearly; at the terminal end, the opening size of the first light exit opening is largest. At this time, the opening depth of the first light emitting hole is kept unchanged, and the opening depth is smaller than 1 mm.
The first light outlet 104 may be a circle, an ellipse, or a regular polygon, such as a square, a regular pentagon, or a regular hexagon, and the like, and the first light outlet of these structures may destroy the total reflection structure of the light outlet portion.
In some embodiments, the opening depth of the first light exiting hole 104 gradually increases from the beginning to the end, that is, the opening depth and the opening size of the first light exiting hole 104 are the same as the opening size, and gradually increase as going away from the beginning to the end, and at the end, the opening depth of the first light exiting hole is the deepest.
Fig. 7 is an expanded side view of the light exit structure of the light guide member of the present embodiment being a second light exit hole, and as shown in fig. 7, in some embodiments, the light exit structure 103 of the light guide member 1 is a second light exit hole 105 formed on the light exit portion 102. The second light emitting hole 105 only adjusts the opening depth, and the opening size remains the same. That is, the opening depth of the second light emitting hole 105 gradually increases from the starting end to the ending end. At the starting end, the opening depth of the second light outlet hole is the minimum; the farther away from the starting end (light source end), the greater the opening depth of the second light outlet hole is, and the depth changes linearly; at the terminal end, the opening depth of the second light outlet hole is the largest.
In other embodiments, the total reflection structure of the light-emitting part may be damaged by laser dotting or silk-screen printing.
The light-emitting part is provided with a light-emitting structure which destroys the total reflection condition, and the light-emitting structure is the second condition for ensuring the uniform illumination of the light-emitting part.
The leaded light spare of this embodiment sets up the portion of lighting into that is the fault plane in the junction of initiating terminal and terminal for place light source spare, light from the portion of lighting into the incidence after, through the light guide part processing of the helical structure of single circle, from the light-emitting part outgoing of leaded light spare bottom, light-emitting part has carried out the light-emitting structure processing of dull polish or trompil, destroys the total reflection condition, makes the bottom light-emitting even, and no fault dark space has promoted luminous efficiency and light-emitting degree of consistency.
Example 2
Fig. 8 is an exploded view of the light guide system of the present embodiment, and as shown in fig. 8, a light guide system 100 includes a light guide member 1 and a light source member 2, wherein the light source member is attached and fixed to a light incident portion 101 of the light guide member 1. In the light guide system 100, the light source 2 and the light guide 1 are tightly connected to form a module structure, so that the structural space of the whole light guide system is saved, and the installation is facilitated.
The light source element 2 is a single light source, and the light source element 2 is fixed to the center of the light entrance portion 101, and the emitted light is guided by the light guide portion 13 of the light guide element 1 and then emitted from the light exit portion 13. The light guide system 100 uses a single light source input, which saves space and cost over conventional dual or triple light source light guide systems. And light source 2 can be as an organic whole structure with the coupling of leaded light spare 1, effectively dwindles the structure size.
The special single-circle spiral annular structure of the light guide piece of the light guide system enables the light emitting efficiency and the light emitting illuminance uniformity to be remarkably increased, and through testing, the light emitting efficiency of the light guide system reaches more than 75%, and the illuminance uniformity can reach more than 90%.
Example 3
A luminaire having the light guide of embodiment 1, or having the light guide system of embodiment 2. In the lamp, the light source part is attached to the light inlet part of the light guide part, and the light source part and the light inlet part form an integral structure, so that the whole size of the light guide system can be reduced; and the effect of multi-light source output can be achieved by adopting single light source input, and the production cost of the lamp can be effectively reduced. In addition, the light guide piece is arranged outside the main lamps of some lamps, so that the effect of atmosphere light can be achieved.
The foregoing is merely exemplary and illustrative of the structures of the present invention, which are described in some detail and detail, and are not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.

Claims (12)

1. A light guide member comprising a starting end, a terminal end, and a light guide portion between the starting end and the terminal end;
the thickness of the light guide part is gradually reduced from the starting end to the terminal end;
the terminal end is connected with the starting end, so that the light guide part forms a closed annular structure;
the starting end is provided with a light inlet part in a cross-sectional surface at the joint with the terminal end, the bottom surface of the light guide part is a light outlet part, and the light outlet part is provided with a light outlet structure.
2. The light guide of claim 1, wherein the light exit structure is a frosted surface, and the frosted surface has a frosting degree that gradually increases from the starting end to the ending end.
3. A light guide member as claimed in claim 1, wherein the light exit structure is a first light exit hole formed in the light exit portion, and an opening size of the first light exit hole gradually increases from the starting end to the terminating end.
4. The light guide of claim 3, wherein the opening depth of the first light outlet hole gradually increases from the starting end to the ending end.
5. A light guide as claimed in claim 3, wherein the first light exit hole is circular, elliptical or regular polygonal.
6. A light guide member as claimed in claim 1, wherein the light exit structure is a second light exit hole formed in the light exit portion, and a depth of the second light exit hole increases gradually from the start end to the end.
7. The light guide of claim 1, wherein the starting end has a thickness a and the terminating end has a thickness b; in the light guide part, the thickness of an extension end which is at a distance x from the starting end is c;
the thickness c of the extension end, the thickness a of the starting end and the thickness b of the terminal end have the following relations:
Figure FDA0003327113020000011
the x is the distance between the extension end and the starting end;
the R is1Is the inner diameter of the light guide member, R2Is the outer diameter of the light guide.
8. The light guide of claim 7, wherein the extended end has a luminous flux density Ex and a cross-sectional luminous flux ΦxHas the following relation:
Figure FDA0003327113020000012
9. the light guide of claim 7, wherein the width R of the light guide and the inner diameter R of the light guide are substantially equal to each other1And an outer diameter R of the light guide member2Has the following relation:
R＝(R2-R1)/2；
the difference between the thickness a of the starting end and the thickness b of the terminal end is a thread pitch L, and the thread pitch L and the width R of the light guide member have the following relational expression:
L＝2R。
10. a light guide system comprising a light source member and the light guide member according to any one of claims 1 to 9, wherein the light source member is provided on the light incident portion.
11. A light guide system according to claim 10, wherein the light source element is located at a central position of the light incident portion.
12. Luminaire comprising a light guide according to any of claims 1-9 or comprising a light guiding system according to any of claims 10-11.
CN202111279441.6A 2021-10-28 2021-10-28 Light guide piece, light guide system and lamp Active CN114063207B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004014122A (en) * 2002-06-03 2004-01-15 Bridgestone Corp Ring-shaped light-emitting body
JP2004246295A (en) * 2003-02-17 2004-09-02 Nippon Leiz Co Ltd Optical coupler
JP2006100009A (en) * 2004-09-28 2006-04-13 Toyoda Gosei Co Ltd Ring-shaped light-emitting substance
CN102109129A (en) * 2009-12-29 2011-06-29 鸿富锦精密工业（深圳）有限公司 Annular light guide structure and backlight module using same
CN103697388A (en) * 2012-09-28 2014-04-02 重庆长安汽车股份有限公司 Light guide lamp for automobile
CN207318769U (en) * 2017-09-13 2018-05-04 深圳市汇晨光学有限公司 A kind of circle light guide structure
CN210323449U (en) * 2019-05-28 2020-04-14 东莞朗勤电子科技有限公司 Light guide structure and backlight source module

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004014122A (en) * 2002-06-03 2004-01-15 Bridgestone Corp Ring-shaped light-emitting body
JP2004246295A (en) * 2003-02-17 2004-09-02 Nippon Leiz Co Ltd Optical coupler
JP2006100009A (en) * 2004-09-28 2006-04-13 Toyoda Gosei Co Ltd Ring-shaped light-emitting substance
CN102109129A (en) * 2009-12-29 2011-06-29 鸿富锦精密工业（深圳）有限公司 Annular light guide structure and backlight module using same
CN103697388A (en) * 2012-09-28 2014-04-02 重庆长安汽车股份有限公司 Light guide lamp for automobile
CN207318769U (en) * 2017-09-13 2018-05-04 深圳市汇晨光学有限公司 A kind of circle light guide structure
CN210323449U (en) * 2019-05-28 2020-04-14 东莞朗勤电子科技有限公司 Light guide structure and backlight source module

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