CN112762412A - Lens for flat lamp and flat lamp comprising lens - Google Patents
Lens for flat lamp and flat lamp comprising lens Download PDFInfo
- Publication number
- CN112762412A CN112762412A CN202110110822.5A CN202110110822A CN112762412A CN 112762412 A CN112762412 A CN 112762412A CN 202110110822 A CN202110110822 A CN 202110110822A CN 112762412 A CN112762412 A CN 112762412A
- Authority
- CN
- China
- Prior art keywords
- lens
- light
- guide plate
- light guide
- panel lamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- F21V5/04—Refractors for light sources of lens shape
-
- 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
- F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
本发明公开了一种平板灯用透镜及含该透镜的平板灯，其中透镜具有入光面和出光面，入光面为凸面，出光面为凹面，入光面的宽度大于出光面的宽度；光源发出的光线经入光面射入透镜，并经透镜汇聚最后经出光面平行射出；平板灯包括LED光源、导光板、反射层和背板。本发明通过在LED光源和导光板的侧面之间设置透镜，提高加大宽度的LED光源发出的光线的汇聚效果，使得光源发出的光在不浪费且有足够光线强度的情况下，导光板变得更轻薄，符合平板灯日趋轻薄化的发展趋势，大大降低导光板的成本。
The invention discloses a lens for a panel lamp and a panel lamp containing the lens, wherein the lens has a light incident surface and a light exit surface, the light entrance surface is a convex surface, the light exit surface is a concave surface, and the width of the light entrance surface is greater than the width of the light exit surface; The light emitted by the light source enters the lens through the light incident surface, and is condensed by the lens and finally exits in parallel through the light emitting surface; the flat panel lamp includes an LED light source, a light guide plate, a reflective layer and a back plate. By arranging a lens between the LED light source and the side surface of the light guide plate, the invention improves the convergence effect of the light emitted by the enlarged width LED light source, so that the light emitted by the light source is not wasted and has sufficient light intensity. It is lighter and thinner, which is in line with the development trend of flat panel lamps becoming thinner and lighter, and greatly reduces the cost of light guide plates.
Description
Technical Field
The invention belongs to the technical field of optical modules, and particularly relates to a lens for a flat lamp and the flat lamp with the lens.
Background
The LED plane lamp is a high-grade indoor lighting lamp, the outer frame of the LED plane lamp is generally made of aluminum alloy, heat dissipation is facilitated, the light source is an LED, the whole lamp is attractive and concise in design and luxurious, a good lighting effect is achieved, and the feeling of beauty is brought to people. The LED plane lamp is unique in design, an even plane light-emitting effect is formed after light passes through the light guide plate with high light transmittance, the illumination uniformity is good, light is soft and comfortable without brightness loss, and eyestrain can be effectively relieved. The LED plane lamp is free of radiation and cannot stimulate the skin of pregnant women, old people and children. The LED plane lamp also has the advantages of being ultrathin, simple in structure, easy to integrate in a suspended ceiling, not easy to damage, incapable of storing dirt and the like. Based on the advantages, the LED flat lamp is more and more widely applied.
However, in order to fully utilize the light emitted from the LED light source, the thickness of the light guide plate needs to be at least greater than that of the LED light source, otherwise the light emitted from the LED light source is wasted outside the light guide plate. In this case, the light guide plate is necessarily thicker, which increases the cost of the light guide plate; and secondly, the thickness and the weight of the LED flat lamp are increased, which is not in line with the development trend that the flat lamp becomes lighter and thinner day by day.
Therefore, it is necessary to develop an LED flat lamp capable of overcoming the above characteristics.
Disclosure of Invention
The invention mainly solves the technical problem of providing a lens for a flat lamp and the flat lamp, wherein the lens is arranged between an LED light source and the side surface of a light guide plate, so that the convergence effect of light rays emitted by the LED light source with enlarged width is improved, the light guide plate becomes thinner under the condition that the light emitted by the light source is not wasted and has enough light ray intensity, the development trend that the flat lamp becomes thinner and thinner day by day is met, and the cost of the light guide plate is greatly reduced.
In order to solve the technical problems, the invention adopts a technical scheme that: providing a lens for a flat lamp, wherein the lens is provided with a light incident surface and a light emergent surface, the light incident surface is a convex surface, the light emergent surface is a concave surface, and the width of the light incident surface is greater than that of the light emergent surface;
light rays emitted by the light source are emitted into the lens through the light incident surface, are converged by the lens and are emitted in parallel through the light emitting surface.
Further, the lens is an integral lens made of the same material with the same refractive index.
The lens comprises a first lens and a second lens, the light incident surface of the first lens is a convex surface, the light emergent surface of the second lens is a concave surface, and the light emergent surface of the first lens and the light incident surface of the second lens are spliced together.
Further, the light emitting surface of the first lens and the light emitting surface of the second lens are both vertical planes, inclined planes or cambered surfaces.
Further, the first lens and the second lens are lenses made of materials having different refractive indices.
Further, the lens is a transparent plastic lens, a glass lens or a silicone lens.
Further, the first lens and the second lens are simultaneously injection molded;
or the first lens and the second lens are adhered into a whole.
The invention also provides a flat lamp with the lens, which comprises an LED light source, a light guide plate, a reflecting layer and a back plate, wherein the back plate, the reflecting layer and the light guide plate are sequentially stacked, the LED light source is positioned on the side surface of the light guide plate, the lens is positioned between the LED light source and the light guide plate, the light incident surface of the lens is close to the LED light source, and the light emergent surface is close to the light guide plate.
The light guide plate comprises a substrate, wherein the substrate is provided with two opposite surfaces which are respectively a front surface and a back surface, the front surface is defined as a light-emitting surface, the back surface is a frosted surface with a light diffusion function, the frosted surface is an uneven rough surface formed by concave parts and convex parts, and the front surface is a hardened hard surface;
the inside of base plate has a plurality of leaded light points.
Further, the thickness of the light incident surface of the lens is defined as D1 and the approximate curvature radius R1, the thickness of the light emergent surface of the lens is defined as D2 and the approximate curvature radius R2, the length of the lens is defined as L, and the thickness of the light guide plate is defined as D3;
the thickness of the light guide plate D3 ═ DI/R1+ (1+ K1) D2/R2 }/(K2X L)
In the formula, K1 is a correction coefficient with the value range of 0.6-0.8, and K2 is a correction coefficient with the value range of 0.2-0.4.
The invention has the beneficial effects that:
the LED light source of the flat lamp is positioned on the side face of the light guide plate, the lens is positioned between the LED light source and the side face of the light guide plate, the lens is provided with a light incoming face and a light outgoing face, the light incoming face is a convex face, the light outgoing face is a concave face, and the width of the light incoming face is larger than that of the light outgoing face; the light emitted by the light source enters the lens through the light entrance surface, is converged by the lens and is emitted in parallel through the light exit surface, and the converging effect of the light emitted by the LED light source with the increased width is improved by arranging the lens between the LED light source and the side surface of the light guide plate, so that the light guide plate becomes thinner and lighter under the conditions that the light emitted by the light source is not wasted and has enough light intensity, and the development trend that the flat lamp becomes thinner and lighter is met; secondly, the weight of the light guide plate is reduced, and the cost of the light guide plate is reduced;
moreover, the back of the light guide plate can be a frosted surface, so that the light guide plate has double functions of light guide and diffusion, a linear light source can be converted into a surface light source, and the light can be emitted more uniformly and softly;
the light guide plate is generally an optical acrylic plate, the surface of the light guide plate is easily scratched and abraded, the original LED flat lamp structure is that the diffusion plate is arranged on the front face of the light guide plate, the diffusion plate plays a role in protecting the front face of the light guide plate besides a diffusion function, the flat lamp provided by the invention is not provided with the diffusion plate, the cost is saved, and the front face of the light guide plate is a hardened hard face under the condition that the light guide plate has a light guiding function and a diffusion function, so that the abrasion or scratch and the like caused by the fact that the front face of the light guide plate is not directly exposed to the outside due to the fact that an extra protection structure is not arranged on the front face of the light guide plate can be avoided.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is one of the schematic structural views of example 1 (the lens is monolithic);
FIG. 2 is a second schematic view of the structure of embodiment 1 (the lens includes a first lens and a second lens as an example);
FIG. 3 is a schematic structural view of embodiment 2 (taking a lens including a first lens and a second lens as an example);
fig. 4 is a schematic structural view of the light guide plate of embodiment 3;
the parts in the drawings are marked as follows:
the light source module comprises a lens 1, a light incident surface 11, a light emitting surface 12, a light source 2, a first lens 13, a second lens 14, an LED light source 3, a light guide plate 4, a substrate 41, a front surface 411, a back surface 412, a light guide point 413, a reflecting layer 5 and a back plate 7.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and the present invention will be described in detail with reference to the accompanying drawings. The invention may be embodied in other different forms, i.e. it is capable of various modifications and changes without departing from the scope of the invention as disclosed.
Example 1: as shown in fig. 1 and 2, the lens 1 has a light incident surface 11 and a light emitting surface 12, the light incident surface is a convex surface, the light emitting surface is a concave surface, and the width of the light incident surface is greater than that of the light emitting surface;
light rays emitted by the light source 2 enter the lens through the light incident surface, are converged by the lens and are emitted in parallel through the light emitting surface.
As shown in fig. 1, the lens is a monolithic lens made of the same material with the same refractive index.
As shown in fig. 2, the lenses include a first lens 13 and a second lens 14, the light incident surface of the first lens is a convex surface, the light emergent surface of the second lens is a concave surface, and the light emergent surface of the first lens and the light incident surface of the second lens are spliced together.
The light-emitting surface of the first lens and the light-emitting surface of the second lens are vertical planes, inclined planes or cambered surfaces.
The first lens and the second lens are lenses made of materials having different refractive indices. Preferably, the refractive index of the first lens is larger than the refractive index of the second lens.
The lens is a transparent plastic lens, a glass lens or a silicone lens, but not limited thereto, in this embodiment, it is preferable that the refractive indexes of the first lens and the second lens are different, and the first lens and the second lens are simultaneously injection-molded by using silicone rubber with different refractive indexes (for example, by changing the formula of the silicone rubber).
The first lens and the second lens are simultaneously injection molded;
or the first lens and the second lens are bonded into a whole, but not limited thereto.
Example 2: the utility model provides a lens for flat lamp, as shown in fig. 3, a flat lamp with lens, flat lamp includes LED light source 3, light guide plate 4, reflection stratum 5 and backplate 7, the backplate the reflection stratum with the light guide plate stacks in proper order, the LED light source is located the side of light guide plate, lens are located the LED light source with between the light guide plate, just the income plain noodles of lens is close to the LED light source, go out the plain noodles and be close to the light guide plate.
In this embodiment, the flat lamp further includes a diffusion layer 6 on the side of the light guide plate away from the reflective layer.
Defining the thickness of the light incident surface of the lens as D1 and approximate curvature radius R1, the thickness of the light emergent surface of the lens as D2 and approximate curvature radius R2, the length of the lens as L and the thickness of the light guide plate as D3;
the thickness of the light guide plate D3 ═ DI/R1+ (1+ K1) D2/R2 }/(K2X L)
In the formula, K1 is a correction coefficient with the value range of 0.6-0.8, and K2 is a correction coefficient with the value range of 0.2-0.4.
The correction coefficients K1 and K2 are measured by statistical models (such as LLSF, SVM) after a large number of limited tests by the applicant.
The formula is calculated according to the characteristics of the lens, and is corrected through multi-measurement calculation, practice effect and the like of an actual product, and finally the lens is obtained.
Example 3: as shown in fig. 4, the structure is similar to that of embodiment 2, except that: the flat lamp of this embodiment does not include a diffusion layer, and the light guide plate includes a substrate 41, the substrate has two opposite surfaces, namely a front surface 411 and a back surface 412, and defines the front surface as a light-emitting surface, the back surface as a frosted surface having a light diffusion function, the frosted surface is an uneven rough surface formed by concave portions and convex portions, and the front surface is a hard surface subjected to a hardening treatment (the treatment is a prior art, such as surface coating or soaking, and thus, is not described herein);
the substrate has a plurality of light guide points 413 inside, and in this embodiment, the light guide points are located inside the substrate and on the side close to the frosting surface.
Preferably, the depth of the light guide point is greater than the depth of the recess.
The frosted surface is formed when the frosted surface is extruded with the substrate;
or the frosted surface is formed on the back surface of the substrate through hot pressing;
or the frosted surface is formed by polishing the back surface of the substrate.
The light guide point is formed in the substrate by laser inner carving.
The substrate is an acrylic board or a PC (polycarbonate) board, but is not limited thereto.
In the embodiment, the back surface of the light guide plate is a frosted surface, so that the light guide plate has double functions of light guide and diffusion, a linear light source can be converted into a surface light source, and the light can be emitted more uniformly and softly;
because the light guide plate is generally an optical-grade acrylic plate, the surface is easily scratched and abraded, the original LED flat lamp structure is that a diffusion plate or a diffusion layer is arranged on the front surface of the light guide plate, the diffusion plate can play a role in protecting the front surface of the light guide plate besides playing a role in diffusion, the flat lamp of the invention saves cost without the diffusion plate, and the front surface of the light guide plate is a hard surface subjected to hardening treatment under the condition that the light guide plate has light guiding and diffusing functions, so that the abrasion or scratch and the like caused by the fact that no extra protection structure is directly exposed to the outside on the front surface of the light guide plate can be avoided, and the service life of the light guide plate or the flat lamp is prolonged;
the light guide points of the light guide plate are positioned in the substrate, and the depth of the light guide points is greater than that of the concave parts of the frosted surface, so that the light guide points are isolated from the outside, the light guide points are effectively protected, the light guide points are not easy to wear, damage and the like, and the service life of the flat lamp is prolonged
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the specification and the drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110110822.5A CN112762412A (en) | 2021-01-27 | 2021-01-27 | Lens for flat lamp and flat lamp comprising lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110110822.5A CN112762412A (en) | 2021-01-27 | 2021-01-27 | Lens for flat lamp and flat lamp comprising lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112762412A true CN112762412A (en) | 2021-05-07 |
Family
ID=75706107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110110822.5A Pending CN112762412A (en) | 2021-01-27 | 2021-01-27 | Lens for flat lamp and flat lamp comprising lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112762412A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113238317A (en) * | 2021-07-09 | 2021-08-10 | 昆山市诚泰电气股份有限公司 | Light guide plate, flat lamp with light guide plate and installation method of flat lamp |
| CN114517907A (en) * | 2022-03-18 | 2022-05-20 | 安徽博悦光学科技有限公司 | Light and thin flat lamp |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006114239A (en) * | 2004-10-12 | 2006-04-27 | Fujikura Ltd | Light guide for planar light source and manufacturing method thereof, planar light source, illumination device, signboard, and liquid crystal display device |
| KR20070017202A (en) * | 2005-01-21 | 2007-02-08 | 마일스톤 가부시키가이샤 | Imaging lens |
| CN202837583U (en) * | 2012-05-04 | 2013-03-27 | 深圳安嵘光电产品有限公司 | Combined type light guide plate and illuminating lamp |
| CN204479790U (en) * | 2015-03-23 | 2015-07-15 | 陈杰勇 | A kind of 3D composite light guide plate |
| CN204573911U (en) * | 2014-12-06 | 2015-08-19 | 深圳市俄菲照明有限公司 | Oval luminous intensity distribution wall lamp lens |
| KR20150128421A (en) * | 2014-05-09 | 2015-11-18 | 주식회사 엘지화학 | Edge type backlight unit improved vertical brightness |
| CN207502764U (en) * | 2017-11-28 | 2018-06-15 | 合肥泰沃达智能装备有限公司 | A kind of backlight module of light leakage light guide plate |
| CN210921264U (en) * | 2019-10-31 | 2020-07-03 | 昆山市诚泰电气股份有限公司 | Optical module and dull and stereotyped lamp with spotlight effect |
| CN214664216U (en) * | 2021-01-27 | 2021-11-09 | 昆山市诚泰电气股份有限公司 | A kind of lens for flat panel lamp and panel lamp containing the lens |
-
2021
- 2021-01-27 CN CN202110110822.5A patent/CN112762412A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006114239A (en) * | 2004-10-12 | 2006-04-27 | Fujikura Ltd | Light guide for planar light source and manufacturing method thereof, planar light source, illumination device, signboard, and liquid crystal display device |
| KR20070017202A (en) * | 2005-01-21 | 2007-02-08 | 마일스톤 가부시키가이샤 | Imaging lens |
| CN202837583U (en) * | 2012-05-04 | 2013-03-27 | 深圳安嵘光电产品有限公司 | Combined type light guide plate and illuminating lamp |
| KR20150128421A (en) * | 2014-05-09 | 2015-11-18 | 주식회사 엘지화학 | Edge type backlight unit improved vertical brightness |
| CN204573911U (en) * | 2014-12-06 | 2015-08-19 | 深圳市俄菲照明有限公司 | Oval luminous intensity distribution wall lamp lens |
| CN204479790U (en) * | 2015-03-23 | 2015-07-15 | 陈杰勇 | A kind of 3D composite light guide plate |
| CN207502764U (en) * | 2017-11-28 | 2018-06-15 | 合肥泰沃达智能装备有限公司 | A kind of backlight module of light leakage light guide plate |
| CN210921264U (en) * | 2019-10-31 | 2020-07-03 | 昆山市诚泰电气股份有限公司 | Optical module and dull and stereotyped lamp with spotlight effect |
| CN214664216U (en) * | 2021-01-27 | 2021-11-09 | 昆山市诚泰电气股份有限公司 | A kind of lens for flat panel lamp and panel lamp containing the lens |
Non-Patent Citations (1)
| Title |
|---|
| 黄碧云;林志贤;陈恩果;徐胜;: "侧入式LED背光模组中光耦合模块的设计与实现", 光学学报, no. 02, 10 February 2016 (2016-02-10), pages 195 - 202 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113238317A (en) * | 2021-07-09 | 2021-08-10 | 昆山市诚泰电气股份有限公司 | Light guide plate, flat lamp with light guide plate and installation method of flat lamp |
| CN114517907A (en) * | 2022-03-18 | 2022-05-20 | 安徽博悦光学科技有限公司 | Light and thin flat lamp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5686965B2 (en) | Backlight assembly using flexible light guide film and liquid crystal display module including the same | |
| CN109031512B (en) | Light guide film assembly, front light source and reflective display device | |
| US5860722A (en) | Flat and transparent front-lighting system using microprisms | |
| JP2692025B2 (en) | Planar light emitter device | |
| TWI428646B (en) | Light guide plate and light emitting apparatus | |
| US6592233B1 (en) | Lighting device for non-emissive displays | |
| US7758229B2 (en) | Light source assembly and backlight module having the same | |
| US20090091935A1 (en) | Light fixture with an efficiency-optimized optical reflection structure | |
| WO2017088237A1 (en) | Backlight module and reflecting layer thereof | |
| CN214664216U (en) | A kind of lens for flat panel lamp and panel lamp containing the lens | |
| CN112762412A (en) | Lens for flat lamp and flat lamp comprising lens | |
| US20170254947A1 (en) | Light guide plate and display device | |
| WO2019153390A1 (en) | Led light strip | |
| TW202326264A (en) | Front light module and eletrophoretic display | |
| KR20010098683A (en) | Reflection type screen illumination apparatus | |
| JP2003202568A (en) | Light guide and method of manufacturing the same, planar light source device, and display device | |
| CN109254345B (en) | Light guide plate and manufacturing method thereof, backlight module, display module and terminal | |
| US20050157518A1 (en) | Small-angled, specifically-positioned and specifically-orientated light emitting device of backlight module of liquid crystal display | |
| JP2012238552A (en) | Mirror with lighting | |
| CN100353239C (en) | Backlight module | |
| TW201502582A (en) | Lens and ligth source module using the same | |
| CN210776108U (en) | Lens for television backlight module | |
| TWI386685B (en) | Optical element, backlight module and display apparatus | |
| KR101488382B1 (en) | Side emitting light emitting diode lens, back light unit and display device including the same | |
| CN112904473A (en) | Light guide plate, backlight module and head-mounted display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20250912 |
|
| AD01 | Patent right deemed abandoned |